Adding upstream version 0.3.3.upstream/0.3.3upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

118 files changed, 20159 insertions, 0 deletions

diff --git a/.github_changelog_generator b/.github_changelog_generator
new file mode 100644
index 0000000..08d2a83
--- /dev/null
+++ b/.github_changelog_generator
@@ -0,0 +1,2 @@
+user=Icinga
+project=icingaweb2-module-toplevelview
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..2dfe791
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,16 @@
+# Exclude editor files
+.*.sw[op]
+*~
+/.idea/
+
+# Except those related to git
+!.git*
+
+# Docker
+/docker-compose.yml
+
+# Artifacts from vendor parts in testing
+/*.phar
+/Icinga
+/Zend
+/vendor
diff --git a/.mailmap b/.mailmap
new file mode 100644
index 0000000..144dd8e
--- /dev/null
+++ b/.mailmap
@@ -0,0 +1,2 @@
+<markus.frosch@icinga.com> <markus.frosch@netways.de>
+<markus.frosch@icinga.com> <markus@lazyfrosch.de>
diff --git a/AUTHORS b/AUTHORS
new file mode 100644
index 0000000..5d81000
--- /dev/null
+++ b/AUTHORS
@@ -0,0 +1,4 @@
+Johannes Meyer <johannes.meyer@icinga.com>
+Markus Frosch <markus.frosch@icinga.com>
+[.::MDT::.] <micheledallatorre@users.noreply.github.com>
+sklaes <sklaes@gmx.de>
diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..650b595
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,104 @@
+# Changelog
+
+## [v0.3.2](https://github.com/Icinga/icingaweb2-module-toplevelview/tree/v0.3.2) (2021-03-19)
+
+[Full Changelog](https://github.com/Icinga/icingaweb2-module-toplevelview/compare/v0.3.1...v0.3.2)
+
+**Implemented enhancements:**
+
+- legacy: Add cleanup and IDO migration tool [\#43](https://github.com/Icinga/icingaweb2-module-toplevelview/pull/43) ([lazyfrosch](https://github.com/lazyfrosch))
+
+**Merged pull requests:**
+
+- Fix typos [\#39](https://github.com/Icinga/icingaweb2-module-toplevelview/pull/39) ([sklaes](https://github.com/sklaes))
+- Update 02-Behavior.md [\#38](https://github.com/Icinga/icingaweb2-module-toplevelview/pull/38) ([micheledallatorre](https://github.com/micheledallatorre))
+
+## [v0.3.1](https://github.com/Icinga/icingaweb2-module-toplevelview/tree/v0.3.1) (2019-03-06)
+
+[Full Changelog](https://github.com/Icinga/icingaweb2-module-toplevelview/compare/v0.3.0...v0.3.1)
+
+**Fixed bugs:**
+
+- Implement Notification Period ignoring for TLVServiceNode [\#36](https://github.com/Icinga/icingaweb2-module-toplevelview/pull/36) ([lazyfrosch](https://github.com/lazyfrosch))
+- HostgroupsummaryQuery: Ignore hostgroups that are empty [\#35](https://github.com/Icinga/icingaweb2-module-toplevelview/pull/35) ([lazyfrosch](https://github.com/lazyfrosch))
+
+## [v0.3.0](https://github.com/Icinga/icingaweb2-module-toplevelview/tree/v0.3.0) (2019-02-28)
+
+[Full Changelog](https://github.com/Icinga/icingaweb2-module-toplevelview/compare/v0.2.1...v0.3.0)
+
+**Implemented enhancements:**
+
+- Allow ignoring a list of notification periods for handled problems [\#34](https://github.com/Icinga/icingaweb2-module-toplevelview/pull/34) ([lazyfrosch](https://github.com/lazyfrosch))
+
+**Closed issues:**
+
+- You need the PHP extension "yaml" in order to use TopLevelView \(rh-php71\) [\#33](https://github.com/Icinga/icingaweb2-module-toplevelview/issues/33)
+
+## [v0.2.1](https://github.com/Icinga/icingaweb2-module-toplevelview/tree/v0.2.1) (2018-02-13)
+
+[Full Changelog](https://github.com/Icinga/icingaweb2-module-toplevelview/compare/v0.2.0...v0.2.1)
+
+**Fixed bugs:**
+
+- UTC timeperiod calculation is wrong [\#29](https://github.com/Icinga/icingaweb2-module-toplevelview/issues/29)
+
+**Merged pull requests:**
+
+- Don't use UTC timestamps for calculating timeperiods [\#30](https://github.com/Icinga/icingaweb2-module-toplevelview/pull/30) ([lazyfrosch](https://github.com/lazyfrosch))
+
+## [v0.2.0](https://github.com/Icinga/icingaweb2-module-toplevelview/tree/v0.2.0) (2018-01-25)
+
+[Full Changelog](https://github.com/Icinga/icingaweb2-module-toplevelview/compare/v0.1.0...v0.2.0)
+
+**Implemented enhancements:**
+
+- style: Update handled colors with material design [\#28](https://github.com/Icinga/icingaweb2-module-toplevelview/pull/28) ([lazyfrosch](https://github.com/lazyfrosch))
+
+**Fixed bugs:**
+
+- Undefined index: unknown coming from TLVServiceNode [\#22](https://github.com/Icinga/icingaweb2-module-toplevelview/issues/22)
+
+**Closed issues:**
+
+- Apply monitoring filter to views [\#25](https://github.com/Icinga/icingaweb2-module-toplevelview/issues/25)
+- Document requirement for Icingaweb2 \>= 2.5.0 [\#23](https://github.com/Icinga/icingaweb2-module-toplevelview/issues/23)
+- You need the PHP extension "yaml" in order to use TopLevelView [\#21](https://github.com/Icinga/icingaweb2-module-toplevelview/issues/21)
+
+## [v0.1.0](https://github.com/Icinga/icingaweb2-module-toplevelview/tree/v0.1.0) (2017-10-17)
+
+[Full Changelog](https://github.com/Icinga/icingaweb2-module-toplevelview/compare/a7bf9bee8ea768a7ba7afe7191f11f221475f1b1...v0.1.0)
+
+**Implemented enhancements:**
+
+- Add documentation [\#15](https://github.com/Icinga/icingaweb2-module-toplevelview/issues/15)
+- Add badges [\#8](https://github.com/Icinga/icingaweb2-module-toplevelview/issues/8)
+- Activate auto-reload and show counter [\#6](https://github.com/Icinga/icingaweb2-module-toplevelview/issues/6)
+- Add caching layer [\#3](https://github.com/Icinga/icingaweb2-module-toplevelview/issues/3)
+- Integrate notification\_period behavior [\#2](https://github.com/Icinga/icingaweb2-module-toplevelview/issues/2)
+- Add documentation [\#19](https://github.com/Icinga/icingaweb2-module-toplevelview/pull/19) ([lazyfrosch](https://github.com/lazyfrosch))
+- Add caching layer [\#9](https://github.com/Icinga/icingaweb2-module-toplevelview/pull/9) ([lazyfrosch](https://github.com/lazyfrosch))
+
+**Fixed bugs:**
+
+- host\_never\_unhandled should affect service\_handled [\#20](https://github.com/Icinga/icingaweb2-module-toplevelview/issues/20)
+- Host down should be visible [\#7](https://github.com/Icinga/icingaweb2-module-toplevelview/issues/7)
+- Auto create missing config dir [\#5](https://github.com/Icinga/icingaweb2-module-toplevelview/issues/5)
+
+**Closed issues:**
+
+- Make notification\_period an option [\#18](https://github.com/Icinga/icingaweb2-module-toplevelview/issues/18)
+- Fix single services in convert [\#17](https://github.com/Icinga/icingaweb2-module-toplevelview/issues/17)
+- Add de\_DE translation [\#16](https://github.com/Icinga/icingaweb2-module-toplevelview/issues/16)
+- Config option for host handled [\#14](https://github.com/Icinga/icingaweb2-module-toplevelview/issues/14)
+- Add docker test and dev environment [\#13](https://github.com/Icinga/icingaweb2-module-toplevelview/issues/13)
+- Config Files should be created with group write permission [\#12](https://github.com/Icinga/icingaweb2-module-toplevelview/issues/12)
+- SOFT states should be ignored [\#11](https://github.com/Icinga/icingaweb2-module-toplevelview/issues/11)
+- Convert in downtime and notifications disabled to a downtime state [\#10](https://github.com/Icinga/icingaweb2-module-toplevelview/issues/10)
+
+**Merged pull requests:**
+
+- Add CLI convert tool for sqlite database [\#1](https://github.com/Icinga/icingaweb2-module-toplevelview/pull/1) ([lazyfrosch](https://github.com/lazyfrosch))
+
+
+
+\* *This Changelog was automatically generated by [github_changelog_generator](https://github.com/github-changelog-generator/github-changelog-generator)*
diff --git a/COPYING b/COPYING
new file mode 100644
index 0000000..d159169
--- /dev/null
+++ b/COPYING
@@ -0,0 +1,339 @@
+                    GNU GENERAL PUBLIC LICENSE
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diff --git a/README.md b/README.md
new file mode 100644
index 0000000..89d3884
--- /dev/null
+++ b/README.md
@@ -0,0 +1,59 @@
+Top Level View for Icinga Web 2
+===============================
+
+![Top Level View screenshot](doc/screenshots/tiles.png)
+
+Top Level View is a hierarchy based status view for Icinga Web 2.
+
+You can define a hierarchical structure containing hosts, services and hostgroups.
+And the view presents you an overview of the overall status of the sub-hierarchies.
+
+With a caching layer, this view can aggregate thousands of status objects and make
+them easily available for overview and drill down.
+
+This view extends the status logic and behavior of Icinga Web 2 a bit,
+please see the documentation on details.
+
+## Requirements
+
+* Icinga Web 2 >= 2.5.0
+  * and its monitoring module
+
+Also see [Introduction in docs](doc/01-Introduction.md).
+
+## Documentation
+
+All documentation can be found inside the [doc](doc/) directory.
+
+Also available inside Icinga Web 2 with the doc module.
+
+## Development Environment
+
+    ./test/setup_vendor.sh
+    
+    cp docker-compose.dev.yml docker-compose.yml
+    # adjust to your needs
+    
+    docker-compose up -d
+    
+Then access [http://localhost:8080](http://localhost:8080).
+
+Default admin user is `icingaadmin` with password `icinga`.
+
+## License
+
+    Copyright (C) 2017 Icinga Development Team <info@icinga.com>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with this program; if not, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
diff --git a/RELEASE.md b/RELEASE.md
new file mode 100644
index 0000000..70a593e
--- /dev/null
+++ b/RELEASE.md
@@ -0,0 +1,58 @@
+# Release Workflow
+
+Specify the release version.
+
+```
+VERSION=0.3.3
+```
+
+## Issues
+
+Check issues at https://github.com/Icinga/icingaweb2-module-toplevelview/issues
+
+## Authors
+
+Update the [.mailmap](.mailmap) and [AUTHORS](AUTHORS) files:
+
+```
+git checkout master
+git log --use-mailmap | grep ^Author: | cut -f2- -d' ' | sort | uniq > AUTHORS
+```
+
+## Update metadata
+
+Edit and update [module.info](module.info).
+
+## Changelog
+
+Update the [CHANGELOG.md](CHANGELOG.md) file.
+
+Uses [github_changelog_generator](https://github.com/skywinder/github-changelog-generator)
+
+```
+export CHANGELOG_GITHUB_TOKEN=xxx
+github_changelog_generator --future-release v$VERSION
+```
+
+Check if the file has been updated correctly.
+
+## Git Tag
+
+Commit these changes to the "master" branch:
+
+```
+git commit -v -a -m "Release version $VERSION"
+git push origin master
+```
+
+And tag it with a signed tag:
+
+```
+git tag -s -m "Version $VERSION" v$VERSION
+```
+
+Push the tag.
+
+```
+git push --tags
+```
diff --git a/application/clicommands/ConvertCommand.php b/application/clicommands/ConvertCommand.php
new file mode 100644
index 0000000..a05538b
--- /dev/null
+++ b/application/clicommands/ConvertCommand.php
@@ -0,0 +1,104 @@
+<?php
+/* TopLevelView module for Icingaweb2 - Copyright (c) 2017 Icinga Development Team <info@icinga.com> */
+
+namespace Icinga\Module\Toplevelview\Clicommands;
+
+use Icinga\Exception\ConfigurationError;
+use Icinga\Module\Toplevelview\Command;
+use Icinga\Module\Toplevelview\Config\ConfigEmitter;
+use Icinga\Module\Toplevelview\Legacy\LegacyDbHelper;
+use Icinga\Module\Toplevelview\ViewConfig;
+use Zend_Db_Adapter_Pdo_Sqlite;
+
+/**
+ * Converts a TopLevelView database into the new YAML configuration format
+ */
+class ConvertCommand extends Command
+{
+    protected $dbConnections = array();
+
+    public function init()
+    {
+        parent::init();
+
+        if (! extension_loaded('pdo_sqlite')) {
+            throw new ConfigurationError('You need the PHP extension "pdo_sqlite" in order to convert TopLevelView');
+        }
+    }
+
+    /**
+     * List all hierarchies in the database
+     *
+     * Arguments:
+     *   --db <file>  SQLite3 data from from old TopLevelView module
+     */
+    public function listAction()
+    {
+        $dbFile = $this->params->getRequired('db');
+        $db = $this->sqlite($dbFile);
+
+        $helper = new LegacyDbHelper($db);
+        foreach ($helper->fetchHierarchies() as $root) {
+            printf("[%d] %s\n", $root['id'], $root['name']);
+        }
+    }
+
+    /**
+     * Generate a YAML config file for Icinga Web 2 module
+     *
+     * Arguments:
+     *   --db <file>      SQLite3 data from from old TopLevelView module
+     *   --id <id>        Database id to export (see list)
+     *   --output <file>  Write to file (default '-' for stdout)
+     *   --name <name>    If name is specified instead of file,
+     *                    config is saved under that name
+     */
+    public function convertAction()
+    {
+        $dbFile = $this->params->getRequired('db');
+        $db = $this->sqlite($dbFile);
+
+        $id = $this->params->getRequired('id');
+
+        $output = $this->params->get('output', null);
+        $name = $this->params->get('name', null);
+        $format = $this->params->get('format', 'yaml');
+
+        $helper = new LegacyDbHelper($db, $this->monitoringBackend());
+        $tree = $helper->fetchTree($id);
+
+        $emitter = ConfigEmitter::fromLegacyTree($tree);
+
+        if ($name !== null and $output === null) {
+            $viewConfig = new ViewConfig();
+            $viewConfig->setConfigDir();
+            $viewConfig->setFormat(ViewConfig::FORMAT_YAML);
+            $viewConfig->setName($name);
+            $viewConfig->setText($emitter->emitYAML($format));
+            $viewConfig->store();
+            printf("Saved as config %s\n", $name);
+            exit(0);
+        }
+
+        $text = $emitter->emit($format);
+        if ($output === null || $output === '-') {
+            echo $text;
+        } else {
+            file_put_contents($output, $text);
+        }
+    }
+
+    /**
+     * Sets up the Zend PDO resource for SQLite
+     *
+     * @param string $file
+     *
+     * @return Zend_Db_Adapter_Pdo_Sqlite
+     */
+    protected function sqlite($file)
+    {
+        return new Zend_Db_Adapter_Pdo_Sqlite(array(
+            'dbname' => $file,
+        ));
+    }
+}
diff --git a/application/clicommands/LegacyCommand.php b/application/clicommands/LegacyCommand.php
new file mode 100644
index 0000000..f9784be
--- /dev/null
+++ b/application/clicommands/LegacyCommand.php
@@ -0,0 +1,92 @@
+<?php
+/* TopLevelView module for Icingaweb2 - Copyright (c) 2021 Icinga Development Team <info@icinga.com> */
+
+namespace Icinga\Module\Toplevelview\Clicommands;
+
+use Icinga\Exception\ConfigurationError;
+use Icinga\Module\Monitoring\Backend\MonitoringBackend;
+use Icinga\Module\Toplevelview\Command;
+use Icinga\Module\Toplevelview\Legacy\LegacyDbHelper;
+use Zend_Db_Adapter_Pdo_Sqlite;
+
+/**
+ * Tools for the legacy DB
+ */
+class LegacyCommand extends Command
+{
+    public function init()
+    {
+        parent::init();
+
+        if (! extension_loaded('pdo_sqlite')) {
+            throw new ConfigurationError('You need the PHP extension "pdo_sqlite" in order to convert TopLevelView');
+        }
+    }
+
+    /**
+     * Delete unreferenced objects from the database
+     *
+     * Arguments:
+     *   --db <file>  SQLite3 data from from old TopLevelView module
+     *   --noop       Only show counts, don't delete
+     */
+    public function cleanupAction()
+    {
+        $dbFile = $this->params->getRequired('db');
+        $noop = $this->params->shift('noop');
+        $db = $this->sqlite($dbFile);
+
+        $helper = new LegacyDbHelper($db);
+
+        $result = $helper->cleanupUnreferencedObjects($noop);
+        foreach ($result as $type => $c) {
+            printf("%s: %d\n", $type, $c);
+        }
+    }
+
+    /**
+     * Migrate database ids from an IDO to another IDO
+     *
+     * Arguments:
+     *   --db <file>      SQLite3 data from from old TopLevelView module
+     *   --target <file>  Target database path (will be overwritten)
+     *   --old <backend>  OLD IDO backend (configured in monitoring module)
+     *   --new <backend>  New IDO backend (configured in monitoring module) (optional)
+     *   --purge          Remove unresolvable data during update (see log)
+     */
+    public function idomigrateAction()
+    {
+        $dbFile = $this->params->getRequired('db');
+        $old = $this->params->getRequired('old');
+        $target = $this->params->getRequired('target');
+        $new = $this->params->get('new');
+        $purge = $this->params->shift('purge');
+
+        $db = $this->sqlite($dbFile);
+
+        $helper = new LegacyDbHelper($db, MonitoringBackend::instance($new));
+        $helper->setOldBackend(MonitoringBackend::instance($old));
+
+        // Use the copy as db
+        $helper->setDb($helper->copySqliteDb($db, $target));
+
+        $result = $helper->migrateObjectIds(false, $purge);
+        foreach ($result as $type => $c) {
+            printf("%s: %d\n", $type, $c);
+        }
+    }
+
+    /**
+     * Sets up the Zend PDO resource for SQLite
+     *
+     * @param string $file
+     *
+     * @return Zend_Db_Adapter_Pdo_Sqlite
+     */
+    protected function sqlite($file)
+    {
+        return new Zend_Db_Adapter_Pdo_Sqlite(array(
+            'dbname' => $file,
+        ));
+    }
+}
diff --git a/application/controllers/EditController.php b/application/controllers/EditController.php
new file mode 100644
index 0000000..b91255c
--- /dev/null
+++ b/application/controllers/EditController.php
@@ -0,0 +1,92 @@
+<?php
+/* Icinga Web 2 | (c) 2016 Icinga Development Team | GPLv2+ */
+
+namespace Icinga\Module\Toplevelview\Controllers;
+
+use Icinga\Module\Toplevelview\Forms\EditForm;
+use Icinga\Module\Toplevelview\ViewConfig;
+use Icinga\Module\Toplevelview\Web\Controller;
+use Icinga\Web\Url;
+
+class EditController extends Controller
+{
+    public function init()
+    {
+        $this->assertPermission('toplevelview/edit');
+
+        $tabs = $this->getTabs();
+
+        if ($name = $this->getParam('name')) {
+            $tabs->add(
+                'tiles',
+                array(
+                    'title' => $this->translate('Tiles'),
+                    'url'   => Url::fromPath('toplevelview/show', array(
+                        'name' => $name
+                    ))
+                )
+            );
+
+            $tabs->add(
+                'index',
+                array(
+                    'title' => $this->translate('Edit'),
+                    'url'   => Url::fromPath('toplevelview/edit', array(
+                        'name' => $name
+                    ))
+                )
+            );
+        }
+
+
+        $action = $this->getRequest()->getActionName();
+        if ($tab = $tabs->get($action)) {
+            $tab->setActive();
+        }
+    }
+
+    public function indexAction()
+    {
+        $action = $this->getRequest()->getActionName();
+        if ($action === 'add') {
+            $this->view->title = sprintf(
+                '%s Top Level View',
+                $this->translate('Add')
+            );
+            $view = new ViewConfig();
+            $view->setConfigDir();
+        } elseif ($action === 'clone') {
+            $name = $this->params->getRequired('name');
+            $this->view->title = sprintf(
+                '%s Top Level View',
+                $this->translate('Clone')
+            );
+            $view = clone ViewConfig::loadByName($name);
+        } else {
+            $this->view->name = $name = $this->params->getRequired('name');
+            $this->view->title = sprintf(
+                '%s Top Level View: %s',
+                $this->translate('Edit'),
+                $this->params->getRequired('name')
+            );
+            $view = ViewConfig::loadByName($name);
+        }
+
+        $this->view->form = $form = new EditForm();
+        $view->setFormat(ViewConfig::FORMAT_YAML);
+        $form->setViewConfig($view);
+        $form->handleRequest();
+
+        $this->setViewScript('edit/index');
+    }
+
+    public function addAction()
+    {
+        $this->indexAction();
+    }
+
+    public function cloneAction()
+    {
+        $this->indexAction();
+    }
+}
diff --git a/application/controllers/IndexController.php b/application/controllers/IndexController.php
new file mode 100644
index 0000000..e1353f3
--- /dev/null
+++ b/application/controllers/IndexController.php
@@ -0,0 +1,24 @@
+<?php
+/* Copyright (C) 2017 Icinga Development Team <info@icinga.com> */
+
+namespace Icinga\Module\Toplevelview\Controllers;
+
+use Icinga\Module\Toplevelview\ViewConfig;
+use Icinga\Module\Toplevelview\Web\Controller;
+
+class IndexController extends Controller
+{
+    public function indexAction()
+    {
+        $this->getTabs()->add(
+            'index',
+            array(
+                'title' => 'Top Level View',
+                'url'   => 'toplevelview',
+            )
+        )->activate('index');
+        $this->view->views = ViewConfig::loadAll();
+
+        $this->setAutorefreshInterval(30);
+    }
+}
diff --git a/application/controllers/ShowController.php b/application/controllers/ShowController.php
new file mode 100644
index 0000000..d0560f2
--- /dev/null
+++ b/application/controllers/ShowController.php
@@ -0,0 +1,93 @@
+<?php
+/* Icinga Web 2 | (c) 2016 Icinga Development Team | GPLv2+ */
+
+namespace Icinga\Module\Toplevelview\Controllers;
+
+use Icinga\Module\Toplevelview\ViewConfig;
+use Icinga\Module\Toplevelview\Web\Controller;
+use Icinga\Web\Url;
+use Icinga\Web\Widget\Tab;
+
+class ShowController extends Controller
+{
+    public function init()
+    {
+        $tabs = $this->getTabs();
+
+        $tiles = Url::fromPath('toplevelview/show', array(
+            'name' => $this->params->getRequired('name')
+        ));
+
+        $tabs->add(
+            'index',
+            array(
+                'title' => $this->translate('Tiles'),
+                'url'   => $tiles
+            )
+        );
+
+        if (($id = $this->getParam('id')) !== null) {
+            $tabs->add(
+                'tree',
+                array(
+                    'title' => $this->translate('Tree'),
+                    'url'   => Url::fromPath('toplevelview/show/tree', array(
+                        'name' => $this->params->getRequired('name'),
+                        'id'   => $id
+                    ))
+                )
+            );
+        }
+
+        $fullscreen = new Tab(array(
+            'title' => $this->translate('Go Fullscreen'),
+            'icon'  => 'dashboard',
+            'url'   => ((string) $tiles) . '&view=compact&showFullscreen'
+        ));
+        $fullscreen->setTargetBlank();
+        $tabs->addAsDropdown('fullscreen', $fullscreen);
+
+        $action = $this->getRequest()->getActionName();
+        if ($tab = $tabs->get($action)) {
+            $tab->setActive();
+        }
+    }
+
+    public function indexAction()
+    {
+        $this->view->name = $name = $this->params->getRequired('name');
+        $this->view->view = $view = ViewConfig::loadByName($name);
+        $tree = $view->getTree();
+        $tree->setBackend($this->monitoringBackend());
+
+        if (($lifetime = $this->getParam('cache')) !== null) {
+            $tree->setCacheLifetime($lifetime);
+        }
+
+        $this->setAutorefreshInterval(30);
+    }
+
+    public function treeAction()
+    {
+        $this->view->name = $name = $this->params->getRequired('name');
+        $this->view->view = $view = ViewConfig::loadByName($name);
+        $tree = $view->getTree();
+        $this->view->node = $tree->getById($this->params->getRequired('id'));
+        $tree->setBackend($this->monitoringBackend());
+
+        if (($lifetime = $this->getParam('cache')) !== null) {
+            $tree->setCacheLifetime($lifetime);
+        }
+
+        $this->setAutorefreshInterval(30);
+    }
+
+    public function sourceAction()
+    {
+        $this->view->name = $name = $this->params->getRequired('name');
+        $this->view->view = $view = ViewConfig::loadByName($name);
+
+        $this->view->text = $view->getText();
+        $this->setViewScript('index', 'text');
+    }
+}
diff --git a/application/forms/EditForm.php b/application/forms/EditForm.php
new file mode 100644
index 0000000..86e7880
--- /dev/null
+++ b/application/forms/EditForm.php
@@ -0,0 +1,176 @@
+<?php
+/* Icinga Web 2 | (c) 2014 Icinga Development Team | GPLv2+ */
+
+namespace Icinga\Module\Toplevelview\Forms;
+
+use Exception;
+use Icinga\Module\Toplevelview\ViewConfig;
+use Icinga\Web\Form;
+use Icinga\Web\Notification;
+use Icinga\Web\Url;
+
+class EditForm extends Form
+{
+    /**
+     * @var ViewConfig
+     */
+    protected $viewConfig;
+
+    /**
+     * {@inheritdoc}
+     */
+    public function init()
+    {
+        $this->setName('form_toplevelview_edit');
+    }
+
+    public function setViewConfig(ViewConfig $viewConfig)
+    {
+        $this->viewConfig = $viewConfig;
+        return $this;
+    }
+
+    /**
+     * @see Form::onSuccess()
+     */
+    public function onSuccess()
+    {
+        try {
+            $this->viewConfig->setName($this->getValue('name'));
+            $this->viewConfig->setText($this->getValue('config'));
+
+            // ensure config can be parsed...
+            $this->viewConfig->getMetaData();
+            $this->viewConfig->getTree();
+
+            $this->viewConfig->storeToSession();
+
+            $cancel = $this->getElement('btn_submit_cancel');
+            $delete = $this->getElement('btn_submit_delete');
+
+            if ($this->getElement('btn_submit_save_file')->getValue() !== null) {
+                $this->viewConfig->store();
+                Notification::success($this->translate('Top Level View successfully saved'));
+            } elseif ($cancel !== null && $cancel->getValue() !== null) {
+                $this->viewConfig->clearSession();
+                Notification::success($this->translate('Top Level View restored from disk'));
+            } elseif ($delete != null && $delete->getValue() !== null) {
+                $this->viewConfig->delete();
+                $this->setRedirectUrl('toplevelview');
+                Notification::success($this->translate('Top Level View successfully deleted'));
+            } else {
+                Notification::success($this->translate('Top Level View successfully saved for the current session'));
+            }
+            return true;
+        } catch (Exception $e) {
+            $this->addError(sprintf('Could not save config: %s', $e->getMessage()));
+            return false;
+        }
+    }
+
+    public function getRedirectUrl()
+    {
+        if ($this->redirectUrl === null && ($name = $this->viewConfig->getName()) !== null) {
+            $this->redirectUrl = Url::fromPath('toplevelview/show', array('name' => $name));
+        }
+        return parent::getRedirectUrl();
+    }
+
+    /**
+     * Populate form
+     *
+     * @see Form::onRequest()
+     */
+    public function onRequest()
+    {
+        $values = array();
+        $values['name'] = $this->viewConfig->getName();
+        $values['config'] = $this->viewConfig->getText();
+
+        $this->populate($values);
+    }
+
+    /**
+     * @see Form::createElements()
+     */
+    public function createElements(array $formData)
+    {
+        if ($this->viewConfig->hasBeenLoadedFromSession()) {
+            $this->warning(
+                $this->translate(
+                    'This config is only stored in your session!'
+                    . ' Make sure to save it to disk once your work is complete!'
+                ),
+                false
+            );
+        }
+
+        $this->addElement(
+            'text',
+            'name',
+            array(
+                'label'    => $this->translate('File name'),
+                'required' => true
+            )
+        );
+        $this->addElement(
+            'textarea',
+            'config',
+            array(
+                //'required'             => true,
+                'label'                => $this->translate('YAML Config'),
+                'class'                => 'code-editor codemirror',
+                'decorators'           => array(
+                    array('Label', array('tag'=>'div', 'separator' => '')),
+                    array('HtmlTag', array('tag' => 'div')),
+                    'ViewHelper'
+                ),
+                'data-codemirror-mode' => 'yaml'
+            )
+        );
+
+        $this->addElement(
+            'submit',
+            'btn_submit_save_session',
+            array(
+                'ignore'     => true,
+                'label'      => $this->translate('Save for the current Session'),
+                'decorators' => array('ViewHelper')
+            )
+        );
+
+        $this->addElement(
+            'submit',
+            'btn_submit_save_file',
+            array(
+                'ignore'     => true,
+                'label'      => $this->translate('Save to config file'),
+                'decorators' => array('ViewHelper')
+            )
+        );
+
+        if ($this->viewConfig->hasBeenLoadedFromSession()) {
+            $this->addElement(
+                'submit',
+                'btn_submit_cancel',
+                array(
+                    'ignore'     => true,
+                    'label'      => $this->translate('Cancel editing'),
+                    'decorators' => array('ViewHelper')
+                )
+            );
+        }
+
+        if ($this->viewConfig->hasBeenLoaded()) {
+            $this->addElement(
+                'submit',
+                'btn_submit_delete',
+                array(
+                    'ignore'     => true,
+                    'label'      => $this->translate('Delete config'),
+                    'decorators' => array('ViewHelper')
+                )
+            );
+        }
+    }
+}
diff --git a/application/locale/de_DE/LC_MESSAGES/toplevelview.mo b/application/locale/de_DE/LC_MESSAGES/toplevelview.mo
new file mode 100644
index 0000000..9964d3f
--- /dev/null
+++ b/application/locale/de_DE/LC_MESSAGES/toplevelview.mo
diff --git a/application/locale/de_DE/LC_MESSAGES/toplevelview.po b/application/locale/de_DE/LC_MESSAGES/toplevelview.po
new file mode 100644
index 0000000..d562ff3
--- /dev/null
+++ b/application/locale/de_DE/LC_MESSAGES/toplevelview.po
@@ -0,0 +1,163 @@
+# Icinga Web 2 - Head for multiple monitoring backends.
+# Copyright (C) 2017 Icinga Development Team
+# This file is distributed under the same license as Toplevelview Module.
+# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: Toplevelview Module (0.0.0)\n"
+"Report-Msgid-Bugs-To: dev@icinga.com\n"
+"POT-Creation-Date: 2017-10-13 11:53+0000\n"
+"PO-Revision-Date: 2017-10-13 14:00+0200\n"
+"Language: de_DE\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Plural-Forms: nplurals=2; plural=(n != 1);\n"
+"X-Poedit-Basepath: .\n"
+"Last-Translator: Markus Frosch <markus.frosch@icinga.com>\n"
+"Language-Team: \n"
+"X-Generator: Poedit 1.8.11\n"
+"X-Poedit-SearchPath-0: .\n"
+
+#: ../../../../modules/toplevelview/application/views/helpers/Tree.php:58
+#, php-format
+msgid "%s host"
+msgid_plural "%s hosts"
+msgstr[0] "%s Host"
+msgstr[1] "%s Hosts"
+
+#: ../../../../modules/toplevelview/application/views/helpers/Tree.php:54
+#, php-format
+msgid "%s unhandled host"
+msgid_plural "%s unhandled hosts"
+msgstr[0] "%s unbehandelte Problem"
+msgstr[1] "%s unbehandelte Probleme"
+
+#: ../../../../modules/toplevelview/application/views/scripts/index/index.phtml:13
+#: ../../../../modules/toplevelview/application/controllers/EditController.php:53
+msgid "Add"
+msgstr "Hinzufügen"
+
+#: ../../../../modules/toplevelview/configuration.php:9
+msgid "Allow the user to edit Top Level Views"
+msgstr "Erlauben dass Benutzer Top Level Views ändern"
+
+#: ../../../../modules/toplevelview/application/forms/EditForm.php:157
+msgid "Cancel editing"
+msgstr "Bearbeitung abbrechen"
+
+#: ../../../../modules/toplevelview/application/views/scripts/show/actions.phtml:19
+#: ../../../../modules/toplevelview/application/controllers/EditController.php:60
+msgid "Clone"
+msgstr "Klonen"
+
+#: ../../../../modules/toplevelview/application/forms/EditForm.php:169
+msgid "Delete config"
+msgstr "Konfiguration löschen"
+
+#: ../../../../modules/toplevelview/application/views/scripts/index/index.phtml:38
+#: ../../../../modules/toplevelview/application/views/scripts/show/actions.phtml:9
+#: ../../../../modules/toplevelview/application/controllers/EditController.php:33
+#: ../../../../modules/toplevelview/application/controllers/EditController.php:66
+msgid "Edit"
+msgstr "Bearbeiten"
+
+#: ../../../../modules/toplevelview/application/views/scripts/edit/index.phtml:9
+msgid "Editor Help"
+msgstr "Editor Hilfe"
+
+#: ../../../../modules/toplevelview/application/forms/EditForm.php:111
+msgid "File name"
+msgstr "Dateiname"
+
+#: ../../../../modules/toplevelview/application/views/scripts/edit/index.phtml:17
+msgid "Find next"
+msgstr "Nächster Treffer"
+
+#: ../../../../modules/toplevelview/application/views/scripts/edit/index.phtml:21
+msgid "Find previous"
+msgstr "Vorheriger Treffer"
+
+#: ../../../../modules/toplevelview/application/controllers/ShowController.php:43
+msgid "Go Fullscreen"
+msgstr "Zur Vollbildansicht"
+
+#: ../../../../modules/toplevelview/application/views/scripts/edit/index.phtml:33
+msgid "Jump to line"
+msgstr "Zu Zeile springen"
+
+#: ../../../../modules/toplevelview/application/views/scripts/show/tree.phtml:16
+#: ../../../../modules/toplevelview/application/views/scripts/show/index.phtml:14
+msgid "Last update"
+msgstr "Letzte Aktualisierung"
+
+#: ../../../../modules/toplevelview/application/views/scripts/edit/index.phtml:13
+msgid ""
+"Persistent search (dialog doesn't autoclose, enter to find next, Shift-Enter "
+"to find previous)"
+msgstr ""
+"Dauerhafte Suche (Dialog schließt nicht automatisch, Enter für nächsten "
+"Treffer, Shift-Enter für Vorherigen)"
+
+#: ../../../../modules/toplevelview/application/views/scripts/edit/index.phtml:25
+msgid "Replace"
+msgstr "Ersetzen"
+
+#: ../../../../modules/toplevelview/application/views/scripts/edit/index.phtml:29
+msgid "Replace all"
+msgstr "Alle Ersetzen"
+
+#: ../../../../modules/toplevelview/application/forms/EditForm.php:136
+msgid "Save for the current Session"
+msgstr "Für die aktuelle Sitzung speichern"
+
+#: ../../../../modules/toplevelview/application/forms/EditForm.php:146
+msgid "Save to config file"
+msgstr "Speichern in Konfigurationsdatei"
+
+#: ../../../../modules/toplevelview/application/views/scripts/show/actions.phtml:30
+msgid "Source"
+msgstr "Quelle"
+
+#: ../../../../modules/toplevelview/application/views/scripts/show/actions.phtml:39
+#: ../../../../modules/toplevelview/application/forms/EditForm.php:101
+msgid ""
+"This config is only stored in your session! Make sure to save it to disk "
+"once your work is complete!"
+msgstr ""
+"Diese Konfiguration ist nur in Ihrer Sitzung gespeichert! Stellen Sie sicher "
+"sie in eine Datei zu speichern wenn Ihre Änderung fertig ist!"
+
+#: ../../../../modules/toplevelview/application/controllers/ShowController.php:24
+#: ../../../../modules/toplevelview/application/controllers/EditController.php:23
+msgid "Tiles"
+msgstr "Kacheln"
+
+#: ../../../../modules/toplevelview/application/forms/EditForm.php:56
+msgid "Top Level View restored from disk"
+msgstr "Top Level View von Speicher wiederhergestellt"
+
+#: ../../../../modules/toplevelview/application/forms/EditForm.php:60
+msgid "Top Level View successfully deleted"
+msgstr "Top Level View erfolgreich gelöscht"
+
+#: ../../../../modules/toplevelview/application/forms/EditForm.php:53
+msgid "Top Level View successfully saved"
+msgstr "Top Level View erfolgreich gespeichert"
+
+#: ../../../../modules/toplevelview/application/forms/EditForm.php:62
+msgid "Top Level View successfully saved for the current session"
+msgstr "Top Level View erfolgreich für Ihre Sitzung gespeichert"
+
+#: ../../../../modules/toplevelview/application/controllers/ShowController.php:33
+msgid "Tree"
+msgstr "Baum"
+
+#: ../../../../modules/toplevelview/application/views/scripts/index/index.phtml:32
+msgid "Unsaved changes!"
+msgstr "Nicht-Gespeicherte Änderungen!"
+
+#: ../../../../modules/toplevelview/application/forms/EditForm.php:120
+msgid "YAML Config"
+msgstr "YAML Konfiguration"
diff --git a/application/views/helpers/Badges.php b/application/views/helpers/Badges.php
new file mode 100644
index 0000000..6066a72
--- /dev/null
+++ b/application/views/helpers/Badges.php
@@ -0,0 +1,49 @@
+<?php
+/* Icinga Web 2 Top Level View | (c) 2017 Icinga Development Team | GPLv2+ */
+
+use Icinga\Module\Toplevelview\Tree\TLVStatus;
+use Icinga\Web\Url;
+
+class Zend_View_Helper_Badges extends Zend_View_Helper_Abstract
+{
+    /** @var \Icinga\Web\View */
+    public $view;
+
+    protected function prettyTitle($identifier)
+    {
+        $s = '';
+        foreach (preg_split('/[\.\-_\s]+/', $identifier) as $p) {
+            $s .= ' ' . ucfirst($p);
+        }
+        return trim($s);
+    }
+
+    public function badges(TLVStatus $status, $problemsOnly = true, $showTotal = false)
+    {
+        $htm = '';
+
+        $values = false;
+        $htm .= '<div class="badges">';
+        foreach ($status->getProperties() as $key => $value) {
+            if ($problemsOnly === true && ($key === 'ok' || $key === 'downtime_active')
+                || ($key === 'total' && $showTotal !== true)
+            ) {
+                continue;
+            }
+            if ($value !== null && $value > 0) {
+                $values = true;
+                $title = $value . ' ' . $this->prettyTitle($key);
+                $class = 'tlv-status-tile ' . str_replace('_', ' ', $key);
+                $htm .= sprintf(
+                    '<div class="badge status-badge %s" title="%s">%s</div>',
+                    $class,
+                    $title,
+                    $value
+                );
+            }
+        }
+        $htm .= '</div>';
+
+        return $values ? $htm : '';
+    }
+}
diff --git a/application/views/helpers/Breadcrumb.php b/application/views/helpers/Breadcrumb.php
new file mode 100644
index 0000000..3263712
--- /dev/null
+++ b/application/views/helpers/Breadcrumb.php
@@ -0,0 +1,32 @@
+<?php
+/* Icinga Web 2 | (c) 2016 Icinga Development Team | GPLv2+ */
+
+use Icinga\Module\Toplevelview\Tree\TLVTreeNode;
+
+class Zend_View_Helper_Breadcrumb extends Zend_View_Helper_Abstract
+{
+    /** @var \Icinga\Web\View */
+    public $view;
+
+    /**
+     * @param TLVTreeNode[] $breadcrumb
+     *
+     * @return string
+     */
+    public function breadcrumb($breadcrumb, $config_name)
+    {
+        $htm = '<ul class="breadcrumb">';
+        foreach ($breadcrumb as $crumb) {
+            $htm .= '<li>' . $this->view->qlink(
+                $crumb->getTitle(),
+                'toplevelview/show/tree',
+                array(
+                        'name' => $config_name,
+                        'id'   => $crumb->getFullId()
+                    )
+            ) . '</li>';
+        }
+        $htm .= '</ul>';
+        return $htm;
+    }
+}
diff --git a/application/views/helpers/Tiles.php b/application/views/helpers/Tiles.php
new file mode 100644
index 0000000..dcefbfe
--- /dev/null
+++ b/application/views/helpers/Tiles.php
@@ -0,0 +1,55 @@
+<?php
+/* Icinga Web 2 Top Level View | (c) 2017 Icinga Development Team | GPLv2+ */
+
+use Icinga\Module\Toplevelview\Tree\TLVTreeNode;
+
+class Zend_View_Helper_Tiles extends Zend_View_Helper_Abstract
+{
+    /** @var \Icinga\Web\View */
+    public $view;
+
+    public function tiles(TLVTreeNode $node, $levels = 2, $classes = array())
+    {
+        $htm = '';
+        $title = $this->view->escape($node->getTitle());
+
+        $status = $node->getStatus();
+        if ($levels > 1) {
+            $statusClass = 'tlv-status-section';
+        } else {
+            $statusClass = 'tlv-status-tile';
+        }
+        $statusClasses = array($statusClass, $status->getOverall());
+
+        $htm .= sprintf(
+            '<div class="tlv-tile %s" title="%s" data-base-target="_next">' . "\n",
+            join(' ', $classes + $statusClasses),
+            $title
+        );
+        $badges = $this->view->badges($status);
+
+        $htm .= $this->view->qlink(
+            $title . $badges,
+            'toplevelview/show/tree',
+            array(
+                'name' => $node->getRoot()->getConfig()->getName(),
+                'id'   => $node->getFullId()
+            ),
+            array(
+                'class' => 'tlv-tile-title'
+            ),
+            false
+        );
+
+        if ($levels > 1 && $node->hasChildren()) {
+            $htm .= '<div class="tlv-tiles">';
+            foreach ($node->getChildren() as $child) {
+                $htm .= $this->tiles($child, $levels - 1, $classes);
+            }
+            $htm .= '</div>';
+        }
+
+        $htm .= "</div>\n";
+        return $htm;
+    }
+}
diff --git a/application/views/helpers/Tree.php b/application/views/helpers/Tree.php
new file mode 100644
index 0000000..a016b68
--- /dev/null
+++ b/application/views/helpers/Tree.php
@@ -0,0 +1,110 @@
+<?php
+/* Icinga Web 2 Top Level View | (c) 2017 Icinga Development Team | GPLv2+ */
+
+use Icinga\Module\Toplevelview\Tree\TLVTreeNode;
+use Icinga\Web\Url;
+
+class Zend_View_Helper_Tree extends Zend_View_Helper_Abstract
+{
+    /** @var \Icinga\Web\View */
+    public $view;
+
+    public function tree(TLVTreeNode $node, $classes = array(), $level = 0)
+    {
+        $htm = '';
+        $htmExtra = '';
+        $title = $node->getTitle();
+        $type = $node->getType();
+
+        $cssClasses = join(' ', $classes);
+
+        $status = $node->getStatus();
+        $statusClass = $status->getOverall();
+
+        if ($type === 'host') {
+            $icon = 'host';
+            $url = Url::fromPath(
+                'monitoring/host/show',
+                array(
+                    'host' => $node->get('host')
+                )
+            );
+        } elseif ($type === 'service') {
+            $icon = 'service';
+            $url = Url::fromPath(
+                'monitoring/service/show',
+                array(
+                    'host'    => $node->get('host'),
+                    'service' => $node->get('service')
+                )
+            );
+        } elseif ($type === 'hostgroup') {
+            $icon = 'cubes';
+            $url = Url::fromPath(
+                'monitoring/list/services',
+                array(
+                    'hostgroup' => $node->get('hostgroup'),
+                    'sort'      => 'service_severity',
+                    'dir'       => 'desc',
+                )
+            );
+
+            if (($h = $status->getMeta('hosts_unhandled')) > 0) {
+                $hostTitle = '(<strong>'
+                    . sprintf($this->view->translatePlural('%s unhandled host', '%s unhandled hosts', $h), $h)
+                    . '</strong>)';
+            } else {
+                $h = $status->getMeta('hosts_total');
+                $hostTitle = '(' . sprintf($this->view->translatePlural('%s host', '%s hosts', $h), $h) . ')';
+            }
+
+            $htmExtra .= ' ' . $this->view->qlink(
+                $hostTitle,
+                'monitoring/list/hosts',
+                array(
+                    'hostgroup' => $node->get('hostgroup'),
+                    'sort'      => 'host_severity',
+                    'dir'       => 'desc',
+                ),
+                null,
+                false
+            );
+        } else {
+            $icon = null;
+            $url = Url::fromPath(
+                'toplevelview/show/tree',
+                array(
+                    'name' => $node->getRoot()->getConfig()->getName(),
+                    'id'   => $node->getFullId()
+                )
+            );
+        }
+
+        if ($type !== 'node') {
+            $htm .= "<div class=\"tlv-node-icinga tlv-node-\$type tlv-status-tile action $statusClass $cssClasses\""
+                . " data-base-target=\"_next\" href=\"$url\">";
+            $htm .= $this->view->icon($icon) . ' ';
+            $htm .= $this->view->qlink($title, $url);
+            $htm .= $htmExtra;
+            $htm .= ' ' . $this->view->badges($status, false);
+            $htm .= '</div>';
+        } else {
+            $htm .= "<div class=\"tlv-tree-node tlv-status-section tlv-collapsible $statusClass $cssClasses\"";
+            $htm .= " title=\"$title\">";
+            $htm .= '<div class="tlv-tree-title">';
+            $htm .= $this->view->badges($status, false, $level === 0 ? true : false);
+            $htm .= '<i class="icon icon-bycss tlv-collapse-handle"></i> ';
+            $htm .= $this->view->qlink($title, $url);
+            $htm .= $htmExtra;
+            $htm .= '</div>';
+            if ($node->hasChildren()) {
+                foreach ($node->getChildren() as $child) {
+                    $htm .= $this->tree($child, $classes, $level + 1);
+                }
+            }
+            $htm .= '</div>';
+        }
+
+        return $htm;
+    }
+}
diff --git a/application/views/scripts/edit/index.phtml b/application/views/scripts/edit/index.phtml
new file mode 100644
index 0000000..614e962
--- /dev/null
+++ b/application/views/scripts/edit/index.phtml
@@ -0,0 +1,36 @@
+<?php if (! $this->compact): ?>
+<div class="controls">
+    <?= $this->tabs ?>
+</div>
+<?php endif ?>
+<div class="content full-form">
+    <h1><?= $title ?></h1>
+    <?= $form ?>
+    <h2><?= $this->translate('Editor Help') ?></h2>
+    <table class="name-value-table">
+        <tr>
+            <th>Ctrl-F / Cmd-F</th>
+            <td><?= $this->translate('Persistent search (dialog doesn\'t autoclose, enter to find next, Shift-Enter to find previous)') ?></td>
+        </tr>
+        <tr>
+            <th>Ctrl-G / Cmd-G</th>
+            <td><?= $this->translate('Find next') ?></td>
+        </tr>
+        <tr>
+            <th>Shift-Ctrl-G / Shift-Cmd-G</th>
+            <td><?= $this->translate('Find previous') ?></td>
+        </tr>
+        <tr>
+            <th>Shift-Ctrl-F / Cmd-Option-F</th>
+            <td><?= $this->translate('Replace') ?></td>
+        </tr>
+        <tr>
+            <th>Shift-Ctrl-R / Shift-Cmd-Option-F</th>
+            <td><?= $this->translate('Replace all') ?></td>
+        </tr>
+        <tr>
+            <th>Alt-G</th>
+            <td><?= $this->translate('Jump to line') ?></td>
+        </tr>
+    </table>
+</div>
diff --git a/application/views/scripts/index/index.phtml b/application/views/scripts/index/index.phtml
new file mode 100644
index 0000000..3797583
--- /dev/null
+++ b/application/views/scripts/index/index.phtml
@@ -0,0 +1,51 @@
+<?php
+/** @var array $views */
+
+if (! $this->compact): ?>
+    <div class="controls">
+        <?= $this->tabs ?>
+    </div>
+<?php endif ?>
+<div class="content">
+    <div class="tlv-overview-tiles">
+        <div class="action-links">
+            <?= $this->qlink(
+                $this->translate('Add'),
+                'toplevelview/edit/add',
+                array(),
+                array(
+                    'class' => 'action-link',
+                    'icon'  => 'plus',
+                )
+            ) ?>
+        </div>
+
+        <?php
+        foreach ($views as $name => $view):
+            /** @var \Icinga\Module\Toplevelview\ViewConfig $view */
+            $url = $this->url('toplevelview/show', array('name' => $name));
+            ?>
+            <div class="tlv-overview-tile">
+                <div class="tlv-title"><?= $this->qlink($view->getMeta('name'), $url) ?></div>
+                <div class="tlv-name"><?= $name ?></div>
+                <?php if ($view->hasBeenLoadedFromSession()): ?>
+                    <div class="unsaved"><?= $this->translate('Unsaved changes!') ?></div>
+                <?php endif; ?>
+
+                <?php if (! $this->compact && $this->hasPermission('toplevelview/edit')): ?>
+                    <div class="action-links">
+                        <?= $this->qlink(
+                            $this->translate('Edit'),
+                            'toplevelview/edit',
+                            array('name' => $view->getName()),
+                            array(
+                                'class' => 'action-link',
+                                'icon'  => 'edit',
+                            )
+                        ) ?>
+                    </div>
+                <?php endif; ?>
+            </div>
+        <?php endforeach; ?>
+    </div>
+</div>
diff --git a/application/views/scripts/show/actions.phtml b/application/views/scripts/show/actions.phtml
new file mode 100644
index 0000000..c72d5a6
--- /dev/null
+++ b/application/views/scripts/show/actions.phtml
@@ -0,0 +1,43 @@
+<?php
+/** @var \Icinga\Module\Toplevelview\ViewConfig $view */
+?>
+<div class="action-links">
+    <?php
+    if (! $this->compact) {
+        if ($this->hasPermission('toplevelview/edit')) {
+            echo $this->qlink(
+                $this->translate('Edit'),
+                'toplevelview/edit',
+                array('name' => $view->getName()),
+                array(
+                    'class'            => 'action-link',
+                    'icon'             => 'edit',
+                    'data-base-target' => '_next'
+                )
+            );
+            echo $this->qlink(
+                $this->translate('Clone'),
+                'toplevelview/edit/clone',
+                array('name' => $view->getName()),
+                array(
+                    'class'            => 'action-link',
+                    'icon'             => 'rewind',
+                    'data-base-target' => '_next'
+                )
+            );
+        } else {
+            echo $this->qlink(
+                $this->translate('Source'),
+                'toplevelview/show/source',
+                array('name' => $view->getName())
+            );
+        }
+    }
+    ?>
+    <?php if ($view->hasBeenLoadedFromSession()): ?>
+        <div class="warning-note">
+            <?= $this->translate('This config is only stored in your session!'
+                . ' Make sure to save it to disk once your work is complete!') ?>
+        </div>
+    <?php endif; ?>
+</div>
diff --git a/application/views/scripts/show/index.phtml b/application/views/scripts/show/index.phtml
new file mode 100644
index 0000000..8278ae4
--- /dev/null
+++ b/application/views/scripts/show/index.phtml
@@ -0,0 +1,23 @@
+<?php
+/** @var \Icinga\Web\View $this */
+/** @var \Icinga\Module\Toplevelview\ViewConfig $view */
+$tree = $view->getTree();
+if (! $this->compact):
+?>
+<div class="controls">
+    <?= $this->tabs ?>
+</div>
+<?php endif ?>
+<div class="content tlv-content">
+    <div class="tlv-header">
+        <?= $this->badges($tree->getStatus(), false, true) ?>
+        <h1><?= $view->getMeta('name') ?></h1>
+        <?= $this->partial('show/actions.phtml', $this) ?>
+        <div class="last-refresh"><?= $this->timeAgo($tree->getFetchTime()) ?></div>
+    </div>
+    <div class="tlv-view-tiles">
+        <?php foreach ($tree->getChildren() as $topTile): ?>
+            <?= $this->tiles($topTile) ?>
+        <?php endforeach; ?>
+    </div>
+</div>
diff --git a/application/views/scripts/show/tree.phtml b/application/views/scripts/show/tree.phtml
new file mode 100644
index 0000000..52e4f80
--- /dev/null
+++ b/application/views/scripts/show/tree.phtml
@@ -0,0 +1,22 @@
+<?php
+/** @var \Icinga\Module\Toplevelview\ViewConfig $view */
+/** @var \Icinga\Module\Toplevelview\Tree\TLVTreeNode $node */
+
+$tree = $view->getTree();
+
+if (! $this->compact):
+?>
+<div class="controls">
+    <?= $this->tabs ?>
+</div>
+<?php endif ?>
+<div class="content tlv-view-tree">
+    <div class="tlv-header">
+        <?= $this->badges($tree->getStatus(), false, true) ?>
+        <h1><?= $view->getMeta('name') ?></h1>
+        <?= $this->partial('show/actions.phtml', $this) ?>
+        <div class="last-refresh"><?= $this->timeAgo($tree->getFetchTime()) ?></div>
+    </div>
+    <?= $this->breadcrumb($node->getBreadCrumb(), $view->getName()) ?>
+    <?= $this->tree($node) ?>
+</div>
diff --git a/application/views/scripts/text/index.phtml b/application/views/scripts/text/index.phtml
new file mode 100644
index 0000000..82b8ee8
--- /dev/null
+++ b/application/views/scripts/text/index.phtml
@@ -0,0 +1,11 @@
+<?php
+/** @var \Icinga\Module\Toplevelview\ViewConfig $view */
+if (! $this->compact):
+?>
+<div class="controls">
+    <?= $this->tabs ?>
+</div>
+<?php endif ?>
+<div class="content">
+    <pre><?= $this->text ?></pre>
+</div>
diff --git a/configuration.php b/configuration.php
new file mode 100644
index 0000000..af09d2f
--- /dev/null
+++ b/configuration.php
@@ -0,0 +1,45 @@
+<?php
+/* Copyright (C) 2017 Icinga Development Team <info@icinga.com> */
+
+/** @var \Icinga\Application\Modules\Module $this */
+
+use Icinga\Module\Toplevelview\ViewConfig;
+use Icinga\Web\Url;
+
+$this->providePermission('toplevelview/edit', $this->translate('Allow the user to edit Top Level Views'));
+
+/** @var \Icinga\Web\Navigation\NavigationItem $section */
+$section = $this->menuSection('toplevelview');
+$section
+    ->setLabel('Top Level View')
+    ->setUrl('toplevelview')
+    ->setIcon('sitemap')
+    ->setPriority(20);
+
+try {
+    if (extension_loaded('yaml')) {
+        /** @var \Icinga\Application\Modules\MenuItemContainer $section */
+        $views = ViewConfig::loadAll();
+
+        foreach ($views as $name => $viewConfig) {
+            $section->add($name, array(
+                'label' => $viewConfig->getMeta('name'),
+                'url'   => Url::fromPath('toplevelview/show', array('name' => $name)),
+            ));
+        }
+    }
+} catch (Exception $e) {
+    // don't fail here...
+}
+
+$this->provideJsFile('vendor/codemirror/codemirror.js');
+$this->provideJsFile('vendor/codemirror/mode/yaml.js');
+$this->provideJsFile('vendor/codemirror/addon/dialog/dialog.js');
+$this->provideJsFile('vendor/codemirror/addon/search/searchcursor.js');
+$this->provideJsFile('vendor/codemirror/addon/search/search.js');
+$this->provideJsFile('vendor/codemirror/addon/search/matchesonscrollbar.js');
+$this->provideJsFile('vendor/codemirror/addon/search/jump-to-line.js');
+
+$this->provideCssFile('vendor/codemirror/codemirror.css');
+$this->provideCssFile('vendor/codemirror/addon/dialog/dialog.css');
+$this->provideCssFile('vendor/codemirror/addon/search/matchesonscrollbar.css');
diff --git a/contrib/README.md b/contrib/README.md
new file mode 100644
index 0000000..5595960
--- /dev/null
+++ b/contrib/README.md
@@ -0,0 +1,16 @@
+TopLevelView contrib files
+==========================
+
+## php-pecl-yaml
+
+No official package is available for RedHat SCL packages. You can use the SPEC file provided here, but make sure to install requirements and enable the SCL repositories.
+
+```
+$ sudo yum install -y centos-release-scl
+or
+$ sudo subscription-manager repos --enable rhel-7-server-optional-rpms --enable rhel-server-rhscl-7-rpms
+
+$ sudo yum install -y rpm-build rpmdevtools scl-utils scl-utils-build
+
+$ rpmbuild -ba SPECS/php-pecl-yaml.spec --define 'scl rh-php71'
+```
diff --git a/contrib/php-pecl-yaml.spec b/contrib/php-pecl-yaml.spec
new file mode 100644
index 0000000..b2d7480
--- /dev/null
+++ b/contrib/php-pecl-yaml.spec
@@ -0,0 +1,226 @@
+%global pecl_name yaml
+%global ini_name  40-%{pecl_name}.ini
+
+%{?scl:%scl_package php-pecl-yaml}
+%{!?scl:%global pkg_name %{name}}
+
+Name:           %{?scl_prefix}php-pecl-yaml
+Version:        2.0.2
+Release:        2%{?dist}
+Summary:        Support for YAML 1.1 serialization using the LibYAML library
+Group:          Development/Languages
+
+License:        MIT
+URL:            http://pecl.php.net/package/yaml
+Source0:        http://pecl.php.net/get/%{pecl_name}-%{version}%{?prever}.tgz
+
+BuildRequires:  %{?scl_prefix}php-devel >= 7
+BuildRequires:  %{?scl_prefix}php-pear
+BuildRequires:  libyaml-devel
+%{?scl:Requires: %scl_runtime}
+%if 0%{?scl:1}
+BuildRequires: scl-utils-build
+Requires: %scl_require %{scl}
+
+# We need some basic system macros
+# Note: Other SCL php packages don't do this, I don't know why -mfrosch
+BuildRequires:  php-devel
+BuildRequires:  php-pear
+%global scl_shortname %(echo "%{scl}" | cut -d- -f2-)
+%global php_inidir %{%{scl_shortname}_php_inidir}
+%global php_core_api %{%{scl_shortname}_php_core_api}
+%global php_zend_api %{%{scl_shortname}_php_zend_api}
+%endif
+
+Requires:       %{?scl_prefix}php(zend-abi) = %{php_zend_api}
+Requires:       %{?scl_prefix}php(api) = %{php_core_api}
+
+Provides:       %{?scl_prefix}php-%{pecl_name} = %{version}
+Provides:       %{?scl_prefix}php-%{pecl_name}%{?_isa} = %{version}
+Provides:       %{?scl_prefix}php-pecl(%{pecl_name}) = %{version}
+Provides:       %{?scl_prefix}php-pecl(%{pecl_name})%{?_isa} = %{version}
+
+
+%description
+The YAML PHP Extension provides a wrapper to the LibYAML library. It gives the
+user the ability to parse YAML document streams into PHP constructs and emit PHP
+constructs as valid YAML 1.1 documents.
+
+Package built for PHP %(%{__php} -r 'echo PHP_MAJOR_VERSION.".".PHP_MINOR_VERSION;')%{?scl: as Software Collection (%{scl} by %{?scl_vendor}%{!?scl_vendor:rh})}.
+
+%prep
+%setup -q -c
+
+pushd %{pecl_name}-%{version}%{?prever}
+popd
+
+# Remove test file to avoid regsitration (pecl list-files yaml)
+sed -e 's/role="test"/role="src"/' \
+    -e '/LICENSE/s/role="doc"/role="src"/' \
+    package.xml >%{pecl_name}-%{version}%{?prever}/package.xml
+
+
+%build
+cd %{pecl_name}-%{version}%{?prever}
+%{_bindir}/phpize
+%configure \
+  --with-php-config=%{_bindir}/php-config
+make %{?_smp_mflags}
+
+
+%check
+cd %{pecl_name}-%{version}%{?prever}
+make test NO_INTERACTION=1 REPORT_EXIT_STATUS=1
+
+: Minimal load test for NTS extension
+%{__php} --no-php-ini \
+    $modules \
+    --define extension=%{buildroot}%{php_extdir}/%{pecl_name}.so \
+    --modules | grep %{pecl_name}
+
+%install
+cd %{pecl_name}-%{version}%{?prever}
+make install INSTALL_ROOT=%{buildroot}
+
+# Basic configuration
+mkdir -p %{buildroot}%{php_inidir}
+cat > %{buildroot}%{php_inidir}/%{ini_name} << 'EOF'
+; Enable %{pecl_name} extension module
+extension=%{pecl_name}.so
+
+; %{pecl_name} extension configuration
+; see http://www.php.net/manual/en/yaml.configuration.php
+
+; Decode entities which have the explicit tag "tag:yaml.org,2002:binary"
+yaml.decode_binary = 0
+; Controls the decoding of "tag:yaml.org,2002:timestamp"
+; 0 will not apply any decoding.
+; 1 will use strtotime().
+; 2 will use date_create().
+yaml.decode_timestamp = 0
+; Cause canonical form output.
+yaml.output_canonical = 0
+; Number of spaces to indent sections. Value should be between 1 and 10.
+yaml.output_indent = 2
+; Set the preferred line width. -1 means unlimited.
+yaml.output_width = 80
+; Enable/disable serialized php object processing.
+yaml.decode_php = 0
+EOF
+
+# Package info
+mkdir -p %{buildroot}%{pecl_xmldir}
+install -p -m 644 package.xml %{buildroot}%{pecl_xmldir}/%{name}.xml
+
+# Documentation
+for i in $(grep 'role="doc"' package.xml | sed -e 's/^.*name="//;s/".*$//')
+do install -Dpm 644 $i %{buildroot}%{pecl_docdir}/%{pecl_name}/$i
+done
+
+
+%files
+%license %{pecl_name}-%{version}%{?prever}/LICENSE
+%doc %{pecl_docdir}/%{pecl_name}
+%config(noreplace) %{php_inidir}/%{ini_name}
+%{php_extdir}/%{pecl_name}.so
+%{pecl_xmldir}/%{name}.xml
+
+
+%changelog
+* Mon Jan 29 2018 Markus Frosch <markus.frosch@netways.de> - 2.0.2-2
+- Add SCL support
+
+* Tue Oct  3 2017 Remi Collet <remi@fedoraproject.org> - 2.0.2-1
+- update to 2.0.2
+
+* Thu Aug 03 2017 Fedora Release Engineering <releng@fedoraproject.org> - 2.0.0-5
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_27_Binutils_Mass_Rebuild
+
+* Thu Jul 27 2017 Fedora Release Engineering <releng@fedoraproject.org> - 2.0.0-4
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_27_Mass_Rebuild
+
+* Wed Mar 29 2017 Remi Collet <remi@fedoraproject.org> - 2.0.0-3
+- add upstream patch to fix FTBFS with 7.1.4RC1, reported by Koschei
+
+* Sat Feb 11 2017 Fedora Release Engineering <releng@fedoraproject.org> - 2.0.0-2
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_26_Mass_Rebuild
+
+* Mon Nov 14 2016 Remi Collet <remi@fedoraproject.org> - 2.0.0-1
+- upate to 2.0.0
+- fix project URL
+
+* Mon Jun 27 2016 Remi Collet <remi@fedoraproject.org> - 2.0.0-0.1.RC8
+- upate to 2.0.0RC8
+- rebuild for https://fedoraproject.org/wiki/Changes/php70
+- fix license installation
+
+* Thu Mar 10 2016 Remi Collet <remi@fedoraproject.org> - 1.2.0-2
+- enable test suite for Koschei
+- drop 1 known to fail test
+
+* Tue Mar 08 2016 Theodore Lee <theo148@gmail.com> - 1.2.0-1
+- Update to upstream 1.2.0 release
+- Disable test suite until datetime handling is fixed
+
+* Thu Feb 04 2016 Fedora Release Engineering <releng@fedoraproject.org> - 1.1.1-7
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_24_Mass_Rebuild
+
+* Thu Jun 18 2015 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 1.1.1-6
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_23_Mass_Rebuild
+
+* Fri Aug 29 2014 Remi Collet <remi@fedoraproject.org> - 1.1.1-5
+- provides php-yaml
+- install doc in pecl_docdir
+- cleanup
+
+* Sun Aug 17 2014 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 1.1.1-4
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_21_22_Mass_Rebuild
+
+* Thu Jun 19 2014 Remi Collet <rcollet@redhat.com> - 1.1.1-3
+- rebuild for https://fedoraproject.org/wiki/Changes/Php56
+- add numerical prefix to extension configuration file
+
+* Sat Jun 07 2014 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 1.1.1-2
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_21_Mass_Rebuild
+
+* Wed Nov 20 2013 Theodore Lee <theo148@gmail.com> - 1.1.1-1
+- Update to upstream 1.1.1 release
+
+* Sun Aug 04 2013 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 1.1.0-5
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_20_Mass_Rebuild
+
+* Fri Mar 22 2013 Remi Collet <rcollet@redhat.com> - 1.1.0-4
+- rebuild for http://fedoraproject.org/wiki/Features/Php55
+
+* Thu Feb 14 2013 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 1.1.0-3
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_19_Mass_Rebuild
+
+* Sat Jul 21 2012 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 1.1.0-2
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_18_Mass_Rebuild
+
+* Fri Apr 20 2012 Theodore Lee <theo148@gmail.com> - 1.1.0-1
+- Update to upstream 1.1.0 release
+- Drop upstreamed cflags patch
+
+* Thu Jan 19 2012 Remi Collet <remi@fedoraproject.org> - 1.0.1-6
+- build against php 5.4
+- fix filters
+
+* Sat Jan 14 2012 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 1.0.1-5
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_17_Mass_Rebuild
+
+* Fri May 13 2011 Theodore Lee <theo148@gmail.com> - 1.0.1-4
+- Fix commenting in module configuration
+
+* Thu May 12 2011 Theodore Lee <theo148@gmail.com> - 1.0.1-3
+- Remove unused php_apiver macro
+- Specify version in php-devel requires
+- Note upstream report for CFLAGS patch
+- Add check section
+- Document options in default config file
+
+* Wed May 04 2011 Theodore Lee <theo148@gmail.com> - 1.0.1-2
+- Update patch to preserve original compiler flags
+
+* Tue May 03 2011 Theodore Lee <theo148@gmail.com> - 1.0.1-1
+- Initial package
diff --git a/doc/01-Introduction.md b/doc/01-Introduction.md
new file mode 100644
index 0000000..84d9661
--- /dev/null
+++ b/doc/01-Introduction.md
@@ -0,0 +1,51 @@
+Introduction
+============
+
+Top Level View is a hierarchy based status view for Icinga Web 2.
+
+You can define a hierarchical structure containing hosts, services and hostgroups.
+And the view presents you an overview of the overall status of the sub-hierarchies.
+
+With a caching layer, this view can aggregate thousands of status objects and make
+them easily available for overview and drill down.
+
+This view extends the status logic and behavior of Icinga Web 2 a bit,
+please see later chapters on details.
+
+## Requirements
+
+* Icinga Web 2 >= 2.5.0
+  * and its monitoring module
+
+## Installation
+
+The view is a simple module for Icinga Web 2, and can be installed via git or a tarball.
+
+Only other requirement is PHP YAML (which is needed for the configuration format), make
+sure to reload your web server after installing the module.
+
+    # on RHEL and compatible
+    yum install php-pecl-yaml
+    systemctl reload httpd.service
+
+    # on Debian / Ubuntu
+    apt-get install php-yaml
+    systemctl reload apache2.service
+
+You should download the latest released tarball from [GitHub](https://github.com/Icinga/icingaweb2-module-toplevelview/releases).
+
+    tar xf icingaweb2-module-toplevelview-0.x.x.tar.gz
+    mv icingaweb2-module-toplevelview-0.x.x/ /usr/share/icingaweb2/modules/toplevelview
+
+Or if you prefer use git.
+
+    git clone https://github.com/Icinga/icingaweb2-module-toplevelview.git \
+      /usr/share/icingaweb2/modules/toplevelview
+
+Enable the module in the web interface, or via CLI:
+
+    icingacli module enable toplevelview
+
+## Permissions
+
+TODO
diff --git a/doc/02-Behavior.md b/doc/02-Behavior.md
new file mode 100644
index 0000000..ae2444b
--- /dev/null
+++ b/doc/02-Behavior.md
@@ -0,0 +1,101 @@
+Behavior
+========
+
+Top Level View uses additional status logic for it's views.
+
+This does not affect the overall status behavior of Icinga 2 or Icinga Web 2,
+but it is important to understand the differences.
+
+## Worst status on top
+
+The main responsibility of TLV is to show you the worst status on top.
+
+Worst status is defined in the following order:
+
+* critical_unhandled
+* warning_unhandled
+* unknown_unhandled
+* critical_handled
+* warning_handled
+* unknown_handled
+* ok
+* downtime_handled
+* missing
+
+In addition counter badges will present you indepth details over the
+status below a tile or tree element.
+
+Similar to Icinga Web 2 you can easily see unhandled problems by the strength of color.
+
+![Unhandled problems](screenshots/colors-unhandled.png)
+![Handled problems](screenshots/colors-handled.png)
+
+## SOFT states
+
+While the normal monitoring views will always show you all current states,
+the Top Level Views will only show hard states.
+
+Which means, as long as the object doesn't have reached a hard state, the
+node should be OK and green.
+
+## Handled and Unhandled
+
+Icinga Web 2 introduced an handled state to every host and service.
+
+By default handled would be true if:
+
+* Problem has been acknowledged
+* Object is in downtime
+
+In Top Level View, a few things are different:
+
+* Downtimes are handled special (see next topic)
+* Notification settings can influence a status (see next topic)
+* Flapping means the state is handled
+
+## Downtime and Notification Periods 
+
+Since downtime and notification settings are essential for alerting,
+Top Level Views tries to integrate these into its status logic.
+
+The following behaviors will trigger the downtime logic:
+
+* Host or Service is in an active downtime
+* Notifications are disabled for the host or service
+* Host or Service is out of its notification period
+
+If those conditions are met:
+
+* TLV counts the service as `downtime_active`
+* TLV ignored non-OK states and marks them as `downtime_handled`
+
+## Additional Features
+
+Some features can be enabled by view, and control some additional behavior.
+
+### Host always handled
+
+Option `host_never_unhandled`
+ 
+Every host problem is set to unhandled by default.
+
+This helps when alerting is mostly based on service states, and the host
+is only a container.
+
+This was a behavior of the old Top Level View, and is enabled on convert.  
+
+### Enabling notification period
+
+Option `notification_periods`
+
+Checks the configured notification_period and handles "out of period" as downtime active state.
+
+This was a behavior of the old Top Level View, and is enabled on convert.  
+
+Also see [limitations](90-Limits.md) for this setting.
+
+### Ignoring certain notification periods
+
+Option `ignored_notification_periods`
+
+This notification periods will be ignored for "out of period" checking, see above.
diff --git a/doc/10-User-Guide.md b/doc/10-User-Guide.md
new file mode 100644
index 0000000..29d7917
--- /dev/null
+++ b/doc/10-User-Guide.md
@@ -0,0 +1,65 @@
+User Guide
+==========
+
+This guide wants to help you understand the basic usage of the module.
+And how to access its data quickly.
+
+To understand the status behavior, see the [chapter about behavior](02-Behavior.md).
+
+## Finding problems
+
+Unhandled problems can be identified based on color saturation of the tiles.
+
+In addition counters show you how many states of what kind lay below.  
+
+![Unhandled colors](screenshots/colors-unhandled.png)
+
+![Handled colors](screenshots/colors-handled.png)
+
+## Drilling down
+
+When you click on tiles in the topmost tile view, you drill down into a
+tree view of that tile.
+
+The tree view is collapsing everything that is in an OK state. So you the
+problems first.
+
+![](screenshots/tiles-tree-problems.png)
+
+In this view everything can be expanded via the arrow handle or a click
+on the title area.
+
+Deeper branches can be opened in a new view by clicking on the title text, but
+this is only needed to filter the shown data.
+
+Every Icinga status object, a host, service or hostgroup is a single tile
+here.
+
+Counters are meant to give you an indication about how many problems, or
+even objects are there. 
+
+## Viewing Icinga details
+
+By clicking on an Icinga tile you get dropped into the Monitoring module,
+which allows you to see all details and interact with the object (e.g. for
+acknowledging the problem).
+
+Clicking on a service ![tile](screenshots/tile-service.png) will bring you
+service detail view, same goes for hosts.
+
+![](screenshots/tree-service.png)
+
+The hostgroup ![tile](screenshots/tile-hostgroup.png) gives 2 options,
+default will take you to a service overview for that hostgroup, sorted by problems.
+
+While clicking on the `X hosts` link in the tile brings you an overview
+over hosts in that group.
+
+![](screenshots/tree-hostgroup.png)
+
+## Note about caching
+
+Please be aware that the data display in Top Level View is cached, for 60
+seconds by default.
+
+Latest state changes will only be reflected after that caching time.
diff --git a/doc/20-Editor.md b/doc/20-Editor.md
new file mode 100644
index 0000000..28dd5c2
--- /dev/null
+++ b/doc/20-Editor.md
@@ -0,0 +1,26 @@
+Config Editor
+=============
+
+The module ships a very basic configuration editor,
+which allows to to edit the bare YAML configuration within the web interface.
+
+Please also see the [chapter on config format](21-Config-Format.md).
+
+## Saving
+
+You have 2 options on saving:
+
+* Save to session - so you can test and review your edit
+* Save to disk - it is stored to disk and visible for everyone
+
+When you have saved changes to your session, but not yet disk, the interface
+reminds you of that.
+
+Also you can cancel an edit with a button below the editor, and return to disk state.
+
+## History
+
+Config history is saved to disk, so it can be restored manually. 
+But there is not interface yet.
+
+See `/etc/icingaweb2/modules/toplevelview/views/<name>/*.yml`.
diff --git a/doc/21-Config-Format.md b/doc/21-Config-Format.md
new file mode 100644
index 0000000..33236e5
--- /dev/null
+++ b/doc/21-Config-Format.md
@@ -0,0 +1,192 @@
+Configuration Format
+====================
+
+The configuration format is based on YAML.
+
+    YAML is a human friendly data serialization standard for all programming languages.
+
+It is an easy way to define data in a hierarchy, and still being able to view and modify it as a human.
+
+For details on the format see [yaml.org](http://yaml.org/).
+
+The configuration is structured in a hierarchical object structure like:
+
+    root object -> children (array) -> objects -> more children 
+
+Every node is unique in the tree, but names can be repeated. An Icinga objects can be inserted multiple times.
+
+## Example
+
+Best to understand it is to start with an example.
+
+```yaml
+name: View Name
+children:
+- name: Section 1
+  children:
+  - name: Tile 1
+    children:
+    - host: localhost
+    - host: localhost
+      service: disk
+    - host: localhost
+      service: ssh
+  - name: Tile 2
+    - hostgroup: linux-servers
+  - name: Tile 3
+- name: Section 2
+  - name: Tile 1
+  - name: Tile 2
+  - name: 'Tile 3: The return of long names' # some values should be quoted
+```
+
+## Layers
+
+The first three layers have a special meaning for the view.
+
+1. Root Node - defines the name of the view
+2. Sections - defines the sections in the tile view
+3. Tiles - builds tiles in the tile view
+
+Everything below is only visible via the tree view, and every Icinga node should be below the 3rd level.
+
+## Nodes
+
+Every node is an object in YAML, while the object attribute `children` is an array of all children objects
+for that node.
+
+Indention does matter as far as it defines the levels and structure of the objects. (Please use no soft tabs!)
+
+Every node can have multiple attributes, they are partially validated, and unknown keys just get ignored.
+
+### Name nodes
+
+Default node type is a simple named node that gets status from deeper nodes.
+
+The root node itself has also only a name, but can contain options mentioned below.
+
+Attributes:
+* `name: Test` user readable name of the object
+
+### Icinga Host
+
+Brings in the host state of an individual Icinga host.
+
+Attributes:
+* `host: localhost` hostname in Icinga
+* `type: host` (optional - detected by key attribute)
+
+### Icinga Service
+
+Brings in the service state of an individual Icinga service.
+
+Attributes:
+* `host: localhost` hostname in Icinga
+* `service: servicename` servicename in Icinga
+* `type: service` (optional - detected by key attribute)
+
+### Icinga Hostgroup
+
+Brings in the hostgroup summary state.
+
+Attributes:
+* `hostgroup: linux-servers` hostname in Icinga
+* `type: hostgroup` (optional - detected by key attribute)
+
+## Options
+
+Additional options are available to control status behavior of
+the respective view.
+
+* `host_never_unhandled` (boolean) Controls the host not being displayed as an unhandled problem. See [behavior](02-Behavior.md#host-always-handled) (Default: false)
+* `notification_periods` (boolean) Controls checking notification_period to be in_period. See [behavior](02-Behavior.md#enabling-notification-period) (Default: false)
+
+These options are just set on the root node:
+
+```yaml
+name: Test Config with Options
+host_never_unhandled: true
+children:
+- name: Section 1
+```
+
+## Examples
+
+Here is a longer example from a testing configuration
+
+```yaml
+name: Test
+children:
+- name: Single Objects
+  children:
+  - name: OK
+    children:
+    - host: host_ok
+    - host: host_ok
+      service: s_ok
+    - host: host_s_soft
+    - host: host_s_soft
+      service: s_critical_soft
+  - name: DOWN
+    children:
+    - host: host_down
+    - host: host_down
+      service: s_critical
+  - name: CRITICAL
+    children:
+    - host: host_s_critical
+    - host: host_s_critical
+      service: s_critical
+  - name: WARNING
+    children:
+    - host: host_s_warning
+    - host: host_s_warning
+      service: s_warning
+- name: Single Objects Handled
+  children:
+  - name: CRITICAL handled
+    children:
+    - host: host_s_critical_handled
+    - host: host_s_critical_handled
+      service: s_critical_handled
+  - name: WARNING handled
+    children:
+    - host: host_s_warning_handled
+    - host: host_s_warning_handled
+      service: s_warning_handled
+- name: Hostgroups
+  children:
+  - name: OK
+    children:
+    - hostgroup: HG_OK
+    - hostgroup: HG_SOFT
+  - name: DOWN
+    children:
+    - hostgroup: HG_DOWN
+  - name: CRITICAL
+    children:
+    - hostgroup: HG_CRITICAL
+  - name: WARNING
+    children:
+    - hostgroup: HG_WARNING
+- name: TLV Missing
+  children:
+  - name: Partially missing
+    children:
+    - host: host_ok
+    - name: missing
+  - name: Missing with problems
+    children:
+    - host: host_down
+    - name: missing
+  - name: Missing with handled
+    children:
+    - host: host_down_handled
+    - name: missing
+  - name: Empty
+    children:
+    - name: nothing here
+  - name: Notexisting Object
+    children:
+    - host: notexisting
+```
\ No newline at end of file
diff --git a/doc/90-Limits.md b/doc/90-Limits.md
new file mode 100644
index 0000000..60dc2c7
--- /dev/null
+++ b/doc/90-Limits.md
@@ -0,0 +1,27 @@
+Limits of this module
+=====================
+
+A few notes about compatibility to Icinga 2.
+
+## Notification Period
+
+Currently Icinga 2 does not publish `notification_period` to the IDO, due
+to the new notification logic.
+
+When `notification_period` is `NULL`, TLV will treat the object as **in period**
+to avoid problems here.
+
+This feature is disabled by default, see [config format](21-Config-Format.md#options) and
+[behavior](02-Behavior.md#enabling-notification-period).
+
+### Period ranges in Icinga 2
+
+The publishing of the individual ranges is buggy in Icinga 2 and can not be used here!
+
+See [Icinga2 #4659](https://github.com/Icinga/icinga2/issues/4659).
+
+### Period ranges in general
+
+Not all types of ranges are published to IDO.
+
+**Only the very basic range type is supported:** Weekday start and end time
diff --git a/doc/91-Custom-Styling.md b/doc/91-Custom-Styling.md
new file mode 100644
index 0000000..f9bb494
--- /dev/null
+++ b/doc/91-Custom-Styling.md
@@ -0,0 +1,48 @@
+Custom Styling
+==============
+
+With a custom theme you can change style and colors of the Top Level View.
+
+Here are a few examples.
+
+## Blinking unhandled
+
+So that unhandled problems are more visible.
+
+```less
+.container.icinga-module.module-toplevelview {
+  .tlv-status-tile.unhandled {
+    animation: blinker 1.5s linear infinite;
+  }
+}
+
+@keyframes blinker {
+  50% {
+    opacity: 0.2;
+  }
+}
+```
+
+## Dark fullscreen
+
+When you open the TLV in fullscreen mode, background will be dark.
+
+```less
+.fullscreen-layout {
+  .container.icinga-module.module-toplevelview {
+    color: #eee;
+    a:visited {
+      color: inherit;
+    }
+    background: #333;
+
+    .controls {
+      background: inherit;
+
+      .active {
+        color: #333;
+      }
+    }
+  }
+}
+```
diff --git a/doc/99-Screenshots.md b/doc/99-Screenshots.md
new file mode 100644
index 0000000..04a7cda
--- /dev/null
+++ b/doc/99-Screenshots.md
@@ -0,0 +1,30 @@
+Screenshots
+===========
+
+Tile view with lots of objects:
+
+![](screenshots/tiles.png)
+
+Tile and Tree view with problems:
+
+![](screenshots/tiles-tree-problems.png)
+
+Tree view with no problems (all collapsed):
+
+![](screenshots/tiles-tree-noproblems.png)
+
+Tree view with no problems (expanded by user):
+
+![](screenshots/tiles-tree-noproblems-expanded.png)
+
+Tree view problems on a hostgroup, and the hostgroup details:
+
+![](screenshots/tree-hostgroup.png)
+
+Tree view problems on services, and the service details:
+
+![](screenshots/tree-service.png)
+
+Overview over all defined views, and the open editor:
+
+![](screenshots/overview-and-editor.png)
diff --git a/doc/screenshots/colors-handled.png b/doc/screenshots/colors-handled.png
new file mode 100644
index 0000000..2256dd7
--- /dev/null
+++ b/doc/screenshots/colors-handled.png
diff --git a/doc/screenshots/colors-unhandled.png b/doc/screenshots/colors-unhandled.png
new file mode 100644
index 0000000..5becad5
--- /dev/null
+++ b/doc/screenshots/colors-unhandled.png
diff --git a/doc/screenshots/overview-and-editor.png b/doc/screenshots/overview-and-editor.png
new file mode 100644
index 0000000..e81a203
--- /dev/null
+++ b/doc/screenshots/overview-and-editor.png
diff --git a/doc/screenshots/tile-hostgroup.png b/doc/screenshots/tile-hostgroup.png
new file mode 100644
index 0000000..d8e9ca5
--- /dev/null
+++ b/doc/screenshots/tile-hostgroup.png
diff --git a/doc/screenshots/tile-service.png b/doc/screenshots/tile-service.png
new file mode 100644
index 0000000..adee05d
--- /dev/null
+++ b/doc/screenshots/tile-service.png
diff --git a/doc/screenshots/tiles-tree-noproblems-expanded.png b/doc/screenshots/tiles-tree-noproblems-expanded.png
new file mode 100644
index 0000000..5ec6c9d
--- /dev/null
+++ b/doc/screenshots/tiles-tree-noproblems-expanded.png
diff --git a/doc/screenshots/tiles-tree-noproblems.png b/doc/screenshots/tiles-tree-noproblems.png
new file mode 100644
index 0000000..b3e1145
--- /dev/null
+++ b/doc/screenshots/tiles-tree-noproblems.png
diff --git a/doc/screenshots/tiles-tree-problems.png b/doc/screenshots/tiles-tree-problems.png
new file mode 100644
index 0000000..921a700
--- /dev/null
+++ b/doc/screenshots/tiles-tree-problems.png
diff --git a/doc/screenshots/tiles.png b/doc/screenshots/tiles.png
new file mode 100644
index 0000000..e94557f
--- /dev/null
+++ b/doc/screenshots/tiles.png
diff --git a/doc/screenshots/tree-hostgroup.png b/doc/screenshots/tree-hostgroup.png
new file mode 100644
index 0000000..6d327f2
--- /dev/null
+++ b/doc/screenshots/tree-hostgroup.png
diff --git a/doc/screenshots/tree-service.png b/doc/screenshots/tree-service.png
new file mode 100644
index 0000000..ae185f6
--- /dev/null
+++ b/doc/screenshots/tree-service.png
diff --git a/docker-compose.dev.yml b/docker-compose.dev.yml
new file mode 100644
index 0000000..4b3cc4f
--- /dev/null
+++ b/docker-compose.dev.yml
@@ -0,0 +1,30 @@
+version: '2'
+
+services:
+  web:
+    image: lazyfrosch/icingaweb2:sqlite
+    build: test/docker/
+    ports:
+      - 8080:80
+    links:
+      - db
+    volumes:
+      - ./test/config:/etc/icingaweb2
+      - ./vendor/icingaweb2:/usr/share/icingaweb2
+      - .:/usr/share/icingaweb2/modules/toplevelview
+
+  db:
+    image: mariadb
+    volumes:
+      - db_data:/var/lib/mysql
+      - ./test/docker/docker-entrypoint-initdb.d:/docker-entrypoint-initdb.d
+    ports:
+      - 3310:3306
+    environment:
+      MYSQL_ROOT_PASSWORD: onlyforadmin
+      MYSQL_DATABASE: icingaweb2
+      MYSQL_USER: icingaweb2
+      MYSQL_PASSWORD: rosebud
+
+volumes:
+  db_data:
diff --git a/library/Toplevelview/Command.php b/library/Toplevelview/Command.php
new file mode 100644
index 0000000..95fb47b
--- /dev/null
+++ b/library/Toplevelview/Command.php
@@ -0,0 +1,44 @@
+<?php
+/* Copyright (C) 2017 Icinga Development Team <info@icinga.com> */
+
+namespace Icinga\Module\Toplevelview;
+
+use Icinga\Application\Icinga;
+use Icinga\Exception\ConfigurationError;
+use Icinga\Exception\IcingaException;
+use Icinga\Module\Monitoring\Backend\MonitoringBackend;
+use Icinga\Cli\Command as IcingaCommand;
+
+class Command extends IcingaCommand
+{
+    /** @var  MonitoringBackend */
+    protected $monitoringBackend;
+
+    public function init()
+    {
+        parent::init();
+
+        if (! extension_loaded('yaml')) {
+            throw new ConfigurationError('You need the PHP extension "yaml" in order to use TopLevelView');
+        }
+    }
+
+    /**
+     * Retrieves the Icinga MonitoringBackend
+     *
+     * @param string|null $name
+     *
+     * @return MonitoringBackend
+     * @throws IcingaException When monitoring is not enabled
+     */
+    protected function monitoringBackend($name = null)
+    {
+        if ($this->monitoringBackend === null) {
+            if (! Icinga::app()->getModuleManager()->hasEnabled('monitoring')) {
+                throw new IcingaException('The module "monitoring" must be enabled and configured!');
+            }
+            $this->monitoringBackend = MonitoringBackend::instance($name);
+        }
+        return $this->monitoringBackend;
+    }
+}
diff --git a/library/Toplevelview/Config/ConfigEmitter.php b/library/Toplevelview/Config/ConfigEmitter.php
new file mode 100644
index 0000000..b8caff9
--- /dev/null
+++ b/library/Toplevelview/Config/ConfigEmitter.php
@@ -0,0 +1,72 @@
+<?php
+/* TopLevelView module for Icingaweb2 - Copyright (c) 2017 Icinga Development Team <info@icinga.com> */
+
+namespace Icinga\Module\Toplevelview\Config;
+
+use Icinga\Exception\NotImplementedError;
+use stdClass;
+
+class ConfigEmitter
+{
+    /** @var array */
+    protected $config;
+
+    public function __construct($config)
+    {
+        $this->config = $config;
+    }
+
+    public static function classToArray($obj)
+    {
+        $arr = array();
+        foreach (get_object_vars($obj) as $k => $v) {
+            if ($k !== 'children') {
+                $arr[$k] = $v;
+            }
+        }
+
+        // handle children last for visibility
+        if (property_exists($obj, 'children')) {
+            $arr['children'] = array();
+            foreach ($obj->children as $child) {
+                // convert each child to an array
+                $arr['children'][] = static::classToArray($child);
+            }
+        }
+
+        return $arr;
+    }
+
+    public static function fromLegacyTree(stdClass $tree)
+    {
+        return new static(static::classToArray($tree));
+    }
+
+    public function emitJSON(&$contentType = null)
+    {
+        $contentType = 'application/json';
+        return json_encode($this->config);
+    }
+
+    public function emitYAML(&$contentType = null)
+    {
+        $contentType = 'application/yaml';
+        return yaml_emit($this->config, YAML_UTF8_ENCODING, YAML_LN_BREAK);
+    }
+
+    public function emitEXPORT(&$contentType = null)
+    {
+        $contentType = 'text/plain';
+        return var_export($this->config, true);
+    }
+
+    public function emit($format, &$contentType = null)
+    {
+        $funcName = 'emit' . strtoupper($format);
+        if (method_exists($this, $funcName)) {
+            return $this->$funcName($contentType);
+        } else {
+            throw new NotImplementedError('format "%s" is not implemented to emit!', $format);
+        }
+    }
+}
diff --git a/library/Toplevelview/Legacy/LegacyDbHelper.php b/library/Toplevelview/Legacy/LegacyDbHelper.php
new file mode 100644
index 0000000..ae50256
--- /dev/null
+++ b/library/Toplevelview/Legacy/LegacyDbHelper.php
@@ -0,0 +1,525 @@
+<?php
+/* TopLevelView module for Icingaweb2 - Copyright (c) 2017 Icinga Development Team <info@icinga.com> */
+
+namespace Icinga\Module\Toplevelview\Legacy;
+
+use Icinga\Application\Benchmark;
+use Icinga\Application\Logger;
+use Icinga\Exception\IcingaException;
+use Icinga\Exception\NotFoundError;
+use Icinga\Exception\ProgrammingError;
+use Icinga\Module\Monitoring\Backend\MonitoringBackend;
+use stdClass;
+use Zend_Db_Adapter_Pdo_Abstract;
+use Zend_Db_Adapter_Pdo_Sqlite;
+
+class LegacyDbHelper
+{
+    /** @var Zend_Db_Adapter_Pdo_Abstract */
+    protected $db;
+
+    /** @var MonitoringBackend */
+    protected $backend;
+
+    /** @var MonitoringBackend */
+    protected $oldBackend;
+
+    protected static $idoObjectIds = [
+        'host'      => 1,
+        'service'   => 2,
+        'hostgroup' => 3,
+    ];
+
+    public function __construct(Zend_Db_Adapter_Pdo_Abstract $db, MonitoringBackend $backend = null)
+    {
+        $this->db = $db;
+        $this->backend = $backend;
+    }
+
+    public function fetchHierarchies()
+    {
+        $query = $this->db->select()
+            ->from('toplevelview_view_hierarchy AS h', array(
+                'id',
+            ))
+            ->joinLeft('toplevelview_view AS v', 'v.id = h.view_id', array(
+                'name',
+                'display_name',
+            ))
+            ->where('h.level = ?', 0)
+            ->where('h.root_id = h.id');
+
+        return $this->db->fetchAll($query);
+    }
+
+    /**
+     * Purges stale object references from the database
+     *
+     * Apparently the original editor replaces the tree data,
+     * but leaves unreferenced objects where the view_id has
+     * no referenced row in toplevelview_view.
+     *
+     * @param bool $noop Only check but don't delete
+     *
+     * @return array object types with counts cleaned up
+     */
+    public function cleanupUnreferencedObjects($noop = false)
+    {
+        $results = [
+            'host'      => 0,
+            'hostgroup' => 0,
+            'service'   => 0
+        ];
+
+        foreach (array_keys($results) as $type) {
+            $query = $this->db->select()
+                ->from("toplevelview_${type} AS o", ['id'])
+                ->joinLeft('toplevelview_view AS v', 'v.id = o.view_id', [])
+                ->where('v.id IS NULL');
+
+            Logger::debug("searching for unreferenced %s objects: %s", $type, (string) $query);
+
+            $ids = $this->db->fetchCol($query);
+            $results[$type] = count($ids);
+
+            if (! $noop) {
+                Logger::debug("deleting unreferenced %s objects: %s", $type, json_encode($ids));
+                $this->db->delete("toplevelview_${type}", sprintf('id IN (%s)', join(', ', $ids)));
+            }
+        }
+
+        return $results;
+    }
+
+    /**
+     * Migrate object ids from an old MonitoringBackend to a new one
+     *
+     * Since data is not stored as names, we need to lookup a name for each id,
+     * and get the new id from the other backend.
+     *
+     * @param bool $noop          Do not update the database
+     * @param bool $removeUnknown Remove objects that are unknown in (new) IDO DB
+     *
+     * @return int[]
+     * @throws IcingaException
+     * @throws \Zend_Db_Adapter_Exception
+     */
+    public function migrateObjectIds($noop = false, $removeUnknown = false)
+    {
+        $result = [
+            'host'      => 0,
+            'service'   => 0,
+            'hostgroup' => 0,
+        ];
+
+        foreach (array_keys($result) as $type) {
+            $query = $this->db->select()
+                ->from("toplevelview_${type}", ['id', "${type}_object_id AS object_id"]);
+
+            Logger::debug("querying stored objects of type %s: %s", $type, (string) $query);
+
+            $objects = [];
+
+            // Load objects indexed by object_id
+            foreach ($this->db->fetchAll($query) as $row) {
+                $objects[$row['object_id']] = (object) $row;
+            }
+
+            // Load names from old DB
+            $idoObjects = $this->oldBackend->getResource()->select()
+                ->from('icinga_objects', ['object_id', 'name1', 'name2'])
+                ->where('objecttype_id', self::$idoObjectIds[$type]);
+
+            // Amend objects with names from old DB
+            foreach ($idoObjects->fetchAll() as $row) {
+                $id = $row->object_id;
+                if (array_key_exists($id, $objects)) {
+                    $idx = $row->name1;
+                    if ($row->name2 !== null) {
+                        $idx .= '!' . $row->name2;
+                    }
+
+                    $objects[$id]->name = $idx;
+                }
+            }
+
+            // Load names from new DB and index by name
+            $newObjects = [];
+            foreach ($this->backend->getResource()->fetchAll($idoObjects) as $row) {
+                $idx = $row->name1;
+                if ($row->name2 !== null) {
+                    $idx .= '!' . $row->name2;
+                }
+
+                $newObjects[$idx] = $row;
+            }
+
+            // Process all objects and store new id
+            $errors = 0;
+            foreach ($objects as $object) {
+                if (! property_exists($object, 'name')) {
+                    Logger::error("object %s %d has not been found in old IDO", $type, $object->object_id);
+                    $errors++;
+                } else if (! array_key_exists($object->name, $newObjects)) {
+                    Logger::error("object %s %d '%s' has not been found in new IDO",
+                        $type, $object->object_id, $object->name);
+                    $errors++;
+                } else {
+                    $object->new_object_id = $newObjects[$object->name]->object_id;
+                    $result[$type]++;
+                }
+            }
+
+            if (! $removeUnknown && $errors > 0) {
+                throw new IcingaException("errors have occurred during IDO id migration - see log");
+            }
+
+            if (! $noop) {
+                foreach ($objects as $object) {
+                    if (property_exists($object, 'new_object_id')) {
+                        $this->db->update(
+                            "toplevelview_${type}",
+                            ["${type}_object_id" => $object->new_object_id],
+                            ["${type}_object_id = ?" => $object->object_id]
+                        );
+                    } else if ($removeUnknown) {
+                        $this->db->delete(
+                            "toplevelview_${type}",
+                            ["${type}_object_id = ?" => $object->object_id]
+                        );
+                    }
+                }
+            }
+        }
+
+        return $result;
+    }
+
+    /**
+     * @param Zend_Db_Adapter_Pdo_Sqlite $db
+     * @param string                     $target
+     *
+     * @return Zend_Db_Adapter_Pdo_Sqlite
+     */
+    public function copySqliteDb(Zend_Db_Adapter_Pdo_Sqlite $db, $target)
+    {
+        // Lock database for copy
+        $db->query('PRAGMA locking_mode = EXCLUSIVE');
+        $db->query('BEGIN EXCLUSIVE');
+
+        $file = $db->getConfig()['dbname'];
+        if (! copy($file, $target)) {
+            throw new IcingaException("could not copy '%s' to '%s'", $file, $target);
+        }
+
+        $db->query('COMMIT');
+        $db->query('PRAGMA locking_mode = NORMAL');
+
+        return new Zend_Db_Adapter_Pdo_Sqlite([
+            'dbname' => $target,
+        ]);
+    }
+
+    protected function fetchDatabaseHierarchy($root_id)
+    {
+        $query = $this->db->select()
+            ->from('toplevelview_view_hierarchy AS p', array())
+            ->joinInner(
+                'toplevelview_view_hierarchy AS n',
+                'n.root_id = p.root_id AND (n.lft BETWEEN p.lft AND p.rgt) AND n.level >= p.level',
+                array('id', 'level')
+            )->joinInner(
+                'toplevelview_view AS v',
+                'v.id = n.view_id',
+                array('name', 'display_name')
+            )->joinLeft(
+                'toplevelview_host AS h',
+                'h.view_id = v.id',
+                array('h.host_object_id')
+            )->joinLeft(
+                'toplevelview_service AS s',
+                's.view_id = v.id',
+                array('s.service_object_id')
+            )->joinLeft(
+                'toplevelview_hostgroup AS hg',
+                'hg.view_id = v.id',
+                array('hg.hostgroup_object_id')
+            )->where(
+                'p.id = ?',
+                $root_id
+            )->group(array(
+                'n.root_id',
+                'n.lft',
+                // 'n.id',
+                'h.host_object_id',
+                's.service_object_id',
+                'hg.hostgroup_object_id',
+            ))->order(array(
+                'n.lft',
+                'hg.hostgroup_object_id',
+                'h.host_object_id',
+                's.service_object_id',
+            ));
+
+        $nodes = $this->db->fetchAll($query);
+
+        if (empty($nodes)) {
+            throw new NotFoundError('Could not find tree for root_id %d', $root_id);
+        }
+
+        return $nodes;
+    }
+
+    protected function buildTree($root_id, $nodes, &$hosts, &$services, &$hostgroups)
+    {
+        /** @var stdClass $tree */
+        $tree = null;
+        /** @var stdClass $currentParent */
+        $currentParent = null;
+        $currentNode = null;
+        $currentLevel = null;
+        $currentId = null;
+        $chain = array();
+
+        $currentHostId = null;
+
+        $hosts = array();
+        $hostgroups = array();
+        $services = array();
+
+        foreach ($nodes as $node) {
+            $node = (object) $node;
+            $node->id = (int) $node->id;
+            $node->level = (int) $node->level;
+
+            if ($currentId === null || $currentId !== $node->id) {
+                // only add the node once (all hosts, services and hostgroups are attached on the same node)
+                $chain[$node->level] = $node;
+
+                if ($tree === null || $node->id === $root_id) {
+                    $currentParent = $tree = $node;
+
+                    // minor tweak: remove "top level view" from title
+                    $newTitle = preg_replace('/^Top\s*Level\s*View\s*/i', '', $tree->name);
+                    if (strlen($newTitle) > 4) {
+                        $tree->name = $tree->display_name = $newTitle;
+                    }
+
+                    // add old default behavior for status
+                    $tree->host_never_unhandled = true;
+                    $tree->notification_periods = true;
+                    $tree->ignored_notification_periods = ['notification_none']; // migration for Director
+                } elseif ($node->level > $currentLevel) {
+                    // level down
+                    $currentParent = $chain[$node->level - 1];
+
+                    if (! property_exists($currentParent, 'children')) {
+                        $currentParent->children = array();
+                    }
+                    $currentParent->children[] = $node;
+                } elseif ($node->level === $currentLevel) {
+                    // same level
+                    $currentParent->children[] = $node;
+                } elseif ($node->level < $currentLevel) {
+                    // level up
+                    $currentParent = $chain[$node->level - 1];
+                    $currentParent->children[] = $node;
+                }
+
+                if ($node->name === $node->display_name) {
+                    unset($node->display_name);
+                }
+
+                $currentId = $node->id;
+                $currentNode = $node;
+
+                // clear current host when node changes
+                $currentHostId = null;
+
+                // remove unused values
+                unset($node->id);
+                unset($node->level);
+            }
+
+            if (property_exists($node, 'host_object_id')
+                && $node->host_object_id !== null
+                && $currentHostId !== $node->host_object_id
+            ) {
+                $currentHostId = $node->host_object_id;
+
+                $host = new stdClass;
+                $host->host = 'UNKNOWN_HOST_' . $node->host_object_id;
+                $host->type = 'host';
+                $host->object_id = $node->host_object_id;
+
+                if (! property_exists($currentNode, 'children')) {
+                    $currentNode->children = array();
+                }
+
+                $currentNode->children['host_' . $node->host_object_id] = $host;
+                $hosts[$node->host_object_id][] = $host;
+            }
+            unset($currentNode->host_object_id);
+
+            if (property_exists($node, 'service_object_id') && $node->service_object_id !== null) {
+                $service = new stdClass;
+                $service->host = 'UNKNOWN_HOST';
+                $service->service = 'UNKNOWN_SERVICE_' . $node->service_object_id;
+                $service->type = 'service';
+                $service->object_id = $node->service_object_id;
+
+                if (! property_exists($currentNode, 'children')) {
+                    $currentNode->children = array();
+                }
+                $currentNode->children['hostservice_' . $node->service_object_id] = $service;
+                $services[$node->service_object_id][] = $service;
+            }
+            unset($currentNode->service_object_id);
+
+            if (property_exists($node, 'hostgroup_object_id') && $node->hostgroup_object_id !== null) {
+                $hostgroup = new stdClass;
+                $hostgroup->hostgroup = 'UNKNOWN_HOSTGROUP_' . $node->hostgroup_object_id;
+                $hostgroup->type = 'hostgroup';
+                $hostgroup->object_id = $node->hostgroup_object_id;
+
+                if (! property_exists($currentNode, 'children')) {
+                    $currentNode->children = array();
+                }
+                $currentNode->children['hostgroup_' . $node->hostgroup_object_id] = $hostgroup;
+                $hostgroups[$node->hostgroup_object_id][] = $hostgroup;
+            }
+            unset($currentNode->hostgroup_object_id);
+        }
+
+        return $tree;
+    }
+
+    public function fetchTree($root_id)
+    {
+        Benchmark::measure('fetchTree: begin');
+
+        $nodes = $this->fetchDatabaseHierarchy($root_id);
+
+        Benchmark::measure('fetchTree: fetchAll done');
+
+        $tree = $this->buildTree($root_id, $nodes, $hosts, $services, $hostgroups);
+
+        Benchmark::measure('fetchTree: done building tree');
+
+        if (! empty($hosts)) {
+            $hostNames = $this->fetchHosts(array_keys($hosts));
+            foreach ($hosts as $objectId => $nodes) {
+                if (array_key_exists($objectId, $hostNames)) {
+                    foreach ($nodes as $node) {
+                        $node->host = $hostNames[$objectId];
+                    }
+                }
+            }
+        }
+
+        Benchmark::measure('fetchTree: done getting host info');
+
+        if (! empty($services)) {
+            $icingaServices = $this->fetchServices(array_keys($services));
+            foreach ($services as $objectId => $nodes) {
+                if (array_key_exists($objectId, $icingaServices)) {
+                    foreach ($nodes as $node) {
+                        $s = $icingaServices[$objectId];
+                        $node->host = $s->host_name;
+                        $node->service = $s->service_name;
+                    }
+                }
+            }
+        }
+
+        Benchmark::measure('fetchTree: done getting service info');
+
+        if (! empty($hostgroups)) {
+            $icingaHostgroups = $this->fetchHostgroups(array_keys($hostgroups));
+            foreach ($hostgroups as $objectId => $nodes) {
+                if (array_key_exists($objectId, $icingaHostgroups)) {
+                    foreach ($nodes as $node) {
+                        $node->hostgroup = $icingaHostgroups[$objectId];
+                    }
+                }
+            }
+        }
+
+        Benchmark::measure('fetchTree: done getting service info');
+
+        return $tree;
+    }
+
+    protected function fetchHosts($ids)
+    {
+        return $this->monitoringBackend()->getResource()->select()
+            ->from('icinga_objects', array(
+                'object_id',
+                'name1',
+            ))
+            ->where('object_id', $ids)
+            ->where('objecttype_id', 1)
+            ->fetchPairs();
+    }
+
+    protected function fetchServices($ids)
+    {
+        $rows = $this->monitoringBackend()->getResource()->select()
+            ->from('icinga_objects', array(
+                'object_id'    => 'object_id',
+                'host_name'    => 'name1',
+                'service_name' => 'name2',
+            ))
+            ->where('object_id', $ids)
+            ->where('objecttype_id', 2)
+            ->fetchAll();
+
+        $services = array();
+        foreach ($rows as $row) {
+            $services[$row->object_id] = $row;
+        }
+        return $services;
+    }
+
+    protected function fetchHostgroups($ids)
+    {
+        return $this->monitoringBackend()->getResource()->select()
+            ->from('icinga_objects', array(
+                'object_id',
+                'name1',
+            ))
+            ->where('object_id', $ids)
+            ->where('objecttype_id', 3)
+            ->fetchPairs();
+    }
+
+    protected function monitoringBackend()
+    {
+        if ($this->backend === null) {
+            throw new ProgrammingError('monitoringBackend has not been set at runtime!');
+        }
+        return $this->backend;
+    }
+
+    /**
+     * @param MonitoringBackend $oldBackend
+     *
+     * @return LegacyDbHelper
+     */
+    public function setOldBackend(MonitoringBackend $oldBackend)
+    {
+        $this->oldBackend = $oldBackend;
+        return $this;
+    }
+
+    /**
+     * @param Zend_Db_Adapter_Pdo_Sqlite $db
+     *
+     * @return $this
+     */
+    public function setDb($db)
+    {
+        $this->db = $db;
+        return $this;
+    }
+}
diff --git a/library/Toplevelview/Monitoring/HostgroupQuery.php b/library/Toplevelview/Monitoring/HostgroupQuery.php
new file mode 100644
index 0000000..62cc014
--- /dev/null
+++ b/library/Toplevelview/Monitoring/HostgroupQuery.php
@@ -0,0 +1,132 @@
+<?php
+/* Copyright (C) 2017 Icinga Development Team <info@icinga.com> */
+
+namespace Icinga\Module\Toplevelview\Monitoring;
+
+use Icinga\Module\Monitoring\Backend\Ido\Query\HostgroupQuery as IcingaHostgroupQuery;
+
+/**
+ * Patched version of HostgroupQuery
+ */
+class HostgroupQuery extends IcingaHostgroupQuery
+{
+    use IgnoredNotificationPeriods;
+    use Options;
+
+    public function __construct($ds, $columns = null, $options = null)
+    {
+        $this->setOptions($options);
+        parent::__construct($ds, $columns);
+    }
+
+    public function init()
+    {
+        if (($periods = $this->getOption('ignored_notification_periods')) !== null) {
+            $this->ignoreNotificationPeriods($periods);
+        }
+
+        $patchedColumnMap = array(
+            'servicestatus'             => array(
+                'service_notifications_enabled' => 'ss.notifications_enabled',
+                'service_is_flapping'           => 'ss.is_flapping',
+                'service_state'                 => '
+                    CASE WHEN ss.has_been_checked = 0 OR ss.has_been_checked IS NULL
+                        THEN 99
+                        ELSE CASE WHEN ss.state_type = 1
+                            THEN ss.current_state
+                            ELSE ss.last_hard_state
+                        END
+                    END',
+                'service_handled'               => '
+                    CASE WHEN (ss.problem_has_been_acknowledged + COALESCE(hs.current_state, 0)) > 0
+                        THEN 1
+                        ELSE 0
+                    END',
+                'service_handled_wo_host'       => '
+                    CASE WHEN ss.problem_has_been_acknowledged > 0
+                        THEN 1 
+                        ELSE 0 
+                    END',
+                'service_in_downtime'           => '
+                    CASE WHEN (ss.scheduled_downtime_depth = 0)
+                        THEN 0
+                        ELSE 1
+                    END',
+            ),
+            'hoststatus'                => array(
+                'host_notifications_enabled' => 'hs.notifications_enabled',
+                'host_is_flapping'           => 'hs.is_flapping',
+                'host_state'                 => '
+                    CASE WHEN hs.has_been_checked = 0 OR hs.has_been_checked IS NULL
+                        THEN 99
+                        ELSE CASE WHEN hs.state_type = 1
+                            THEN hs.current_state
+                            ELSE hs.last_hard_state 
+                        END 
+                    END',
+                'host_handled'               => '
+                    CASE WHEN hs.problem_has_been_acknowledged > 0
+                        THEN 1
+                        ELSE 0 
+                    END',
+                'host_in_downtime'           => '
+                    CASE WHEN (hs.scheduled_downtime_depth = 0)
+                        THEN 0
+                        ELSE 1
+                    END',
+            ),
+            'servicenotificationperiod' => array(
+                'service_notification_period'    => 'ntpo.name1',
+                'service_in_notification_period' => '
+                    CASE WHEN ntpo.object_id IS NULL
+                        THEN 1 
+                        ELSE CASE WHEN ntpr.timeperiod_id IS NOT NULL
+                            THEN 1
+                            ELSE 0 
+                        END 
+                    END',
+            ),
+        );
+
+        foreach ($patchedColumnMap as $table => $columns) {
+            foreach ($columns as $k => $v) {
+                $this->columnMap[$table][$k] = $v;
+            }
+        }
+
+        parent::init();
+    }
+
+    protected function joinServicenotificationperiod()
+    {
+        $extraJoinCond = '';
+
+        if ($this->hasIgnoredNotifications()) {
+            $extraJoinCond .= $this->db->quoteInto(
+                ' AND ntpo.name1 NOT IN (?)',
+                $this->getIgnoredNotificationPeriods()
+            );
+        }
+
+        $this->select->joinLeft(
+            ['ntp' => $this->prefix . 'timeperiods'],
+            'ntp.timeperiod_object_id = s.notification_timeperiod_object_id'
+            . ' AND ntp.config_type = 1 AND ntp.instance_id = s.instance_id',
+            []
+        );
+        $this->select->joinLeft(
+            ['ntpo' => $this->prefix . 'objects'],
+            'ntpo.object_id = s.notification_timeperiod_object_id' . $extraJoinCond,
+            []
+        );
+        $this->select->joinLeft(
+            ['ntpr' => $this->prefix . 'timeperiod_timeranges'],
+            "ntpr.timeperiod_id = ntp.timeperiod_id
+                AND ntpr.day = DAYOFWEEK(CURRENT_DATE()) - 1
+                AND ntpr.start_sec <= UNIX_TIMESTAMP() - UNIX_TIMESTAMP(CURRENT_DATE())
+                AND ntpr.end_sec >= UNIX_TIMESTAMP() - UNIX_TIMESTAMP(CURRENT_DATE())
+            ",
+            []
+        );
+    }
+}
diff --git a/library/Toplevelview/Monitoring/Hostgroupsummary.php b/library/Toplevelview/Monitoring/Hostgroupsummary.php
new file mode 100644
index 0000000..c89f09c
--- /dev/null
+++ b/library/Toplevelview/Monitoring/Hostgroupsummary.php
@@ -0,0 +1,33 @@
+<?php
+/* Copyright (C) 2017 Icinga Development Team <info@icinga.com> */
+
+namespace Icinga\Module\Toplevelview\Monitoring;
+
+use Icinga\Data\ConnectionInterface;
+use Icinga\Module\Monitoring\Backend\MonitoringBackend;
+use Icinga\Module\Monitoring\DataView\Hostgroupsummary as IcingaHostgroupsummary;
+
+/**
+ * Patched version of Hostgroupsummary
+ *
+ * Just to load a patched version of HostgroupsummaryQuery
+ */
+class Hostgroupsummary extends IcingaHostgroupsummary
+{
+    /** @noinspection PhpMissingParentConstructorInspection */
+    /**
+     * @param ConnectionInterface $connection
+     * @param array|null          $columns
+     * @param array|null          $options
+     * @noinspection PhpMissingParentConstructorInspection
+     */
+    public function __construct(
+        ConnectionInterface $connection,
+        array $columns = null,
+        $options = null
+    ) {
+        /** @var MonitoringBackend $connection */
+        $this->connection = $connection;
+        $this->query = new HostgroupsummaryQuery($connection->getResource(), $columns, $options);
+    }
+}
diff --git a/library/Toplevelview/Monitoring/HostgroupsummaryQuery.php b/library/Toplevelview/Monitoring/HostgroupsummaryQuery.php
new file mode 100644
index 0000000..5390613
--- /dev/null
+++ b/library/Toplevelview/Monitoring/HostgroupsummaryQuery.php
@@ -0,0 +1,157 @@
+<?php
+/* Copyright (C) 2017 Icinga Development Team <info@icinga.com> */
+
+namespace Icinga\Module\Toplevelview\Monitoring;
+
+use Icinga\Data\Filter\Filter;
+use Icinga\Module\Monitoring\Backend\Ido\Query\HostgroupsummaryQuery as IcingaHostgroupsummaryQuery;
+use Zend_Db_Expr;
+use Zend_Db_Select;
+
+/**
+ * Patched version of HostgroupsummaryQuery
+ */
+class HostgroupsummaryQuery extends IcingaHostgroupsummaryQuery
+{
+    use Options;
+
+    public function __construct($ds, $columns = null, $options = null)
+    {
+        $this->setOptions($options);
+        parent::__construct($ds, $columns);
+    }
+
+    public function init()
+    {
+        if ($this->getOption('notification_periods') === true) {
+            $serviceOutDowntime =#
+                'service_notifications_enabled = 1 AND service_in_downtime = 0 AND service_in_notification_period = 1';
+            $serviceInDowntime =
+                '(service_notifications_enabled = 0 OR service_in_downtime = 1 OR service_in_notification_period = 0)';
+        } else {
+            $serviceOutDowntime = 'service_notifications_enabled = 1 AND service_in_downtime = 0';
+            $serviceInDowntime = '(service_notifications_enabled = 0 OR service_in_downtime = 1)';
+        }
+
+        $hostOutDowntime = 'host_notifications_enabled = 1 AND host_in_downtime = 0';
+        $hostInDowntime = '(host_notifications_enabled = 0 OR host_in_downtime = 1)';
+
+        if ($this->getOption('host_never_unhandled') === true) {
+            $patchServicesHandled = "(service_handled_wo_host = 1 OR service_is_flapping = 1) AND $serviceOutDowntime";
+            $patchServicesUnhandled = "service_handled_wo_host = 0 AND service_is_flapping = 0 AND $serviceOutDowntime";
+        } else {
+            $patchServicesHandled = "(service_handled = 1 OR service_is_flapping = 1) AND $serviceOutDowntime";
+            $patchServicesUnhandled = "service_handled = 0 AND service_is_flapping = 0 AND $serviceOutDowntime";
+        }
+
+        $patchHostsHandled = "(host_handled = 1 OR host_is_flapping = 1) AND $hostOutDowntime";
+        $patchHostsUnhandled = "host_handled = 0 AND host_is_flapping = 0 AND $hostOutDowntime";
+
+        $patchedColumnMap = array(
+            'hostgroupsummary' => array(
+                'hosts_down_handled'          =>
+                    "SUM(CASE WHEN host_state = 1 AND $patchHostsHandled THEN 1 ELSE 0 END)",
+                'hosts_down_unhandled'        =>
+                    "SUM(CASE WHEN host_state = 1 AND $patchHostsUnhandled THEN 1 ELSE 0 END)",
+                'hosts_unreachable_handled'   =>
+                    "SUM(CASE WHEN host_state = 2 AND $patchHostsHandled THEN 1 ELSE 0 END)",
+                'hosts_unreachable_unhandled' =>
+                    "SUM(CASE WHEN host_state = 2 AND $patchHostsUnhandled THEN 1 ELSE 0 END)",
+                'hosts_downtime_handled'      =>
+                    "SUM(CASE WHEN host_state != 0 AND $hostInDowntime THEN 1 ELSE 0 END)",
+                'hosts_downtime_active'       =>
+                    "SUM(CASE WHEN $hostInDowntime THEN 1 ELSE 0 END)",
+                'services_critical_handled'   =>
+                    "SUM(CASE WHEN service_state = 2 AND $patchServicesHandled THEN 1 ELSE 0 END)",
+                'services_critical_unhandled' =>
+                    "SUM(CASE WHEN service_state = 2 AND $patchServicesUnhandled THEN 1 ELSE 0 END)",
+                'services_unknown_handled'    =>
+                    "SUM(CASE WHEN service_state = 3 AND $patchServicesHandled THEN 1 ELSE 0 END)",
+                'services_unknown_unhandled'  =>
+                    "SUM(CASE WHEN service_state = 3 AND $patchServicesUnhandled THEN 1 ELSE 0 END)",
+                'services_warning_handled'    =>
+                    "SUM(CASE WHEN service_state = 1 AND $patchServicesHandled THEN 1 ELSE 0 END)",
+                'services_warning_unhandled'  =>
+                    "SUM(CASE WHEN service_state = 1 AND $patchServicesUnhandled THEN 1 ELSE 0 END)",
+                'services_downtime_handled'   =>
+                    "SUM(CASE WHEN service_state != 0 AND $serviceInDowntime THEN 1 ELSE 0 END)",
+                'services_downtime_active'    =>
+                    "SUM(CASE WHEN $serviceInDowntime THEN 1 ELSE 0 END)",
+            )
+        );
+
+        foreach ($patchedColumnMap as $table => $columns) {
+            foreach ($columns as $k => $v) {
+                $this->columnMap[$table][$k] = $v;
+            }
+        }
+        parent::init();
+    }
+
+    protected function createSubQuery($queryName, $columns = array())
+    {
+        if ($queryName === 'Hostgroup') {
+            // use locally patched query
+            return new HostgroupQuery($this->ds, $columns, $this->options);
+        } else {
+            return parent::createSubQuery($queryName, $columns);
+        }
+    }
+
+    protected function joinBaseTables()
+    {
+        $this->countQuery = $this->createSubQuery(
+            'Hostgroup',
+            array()
+        );
+        $hostColumns = array(
+            'hostgroup_alias',
+            'hostgroup_name',
+            'host_handled',
+            'host_notifications_enabled',
+            'host_state',
+            'host_is_flapping',
+            'host_in_downtime',
+            'service_handled'               => new Zend_Db_Expr('NULL'),
+            'service_handled_wo_host'       => new Zend_Db_Expr('NULL'),
+            'service_state'                 => new Zend_Db_Expr('NULL'),
+            'service_notifications_enabled' => new Zend_Db_Expr('NULL'),
+            'service_is_flapping'           => new Zend_Db_Expr('NULL'),
+            'service_in_downtime'           => new Zend_Db_Expr('NULL'),
+        );
+
+        $serviceColumns = array(
+            'hostgroup_alias',
+            'hostgroup_name',
+            'host_handled'               => new Zend_Db_Expr('NULL'),
+            'host_state'                 => new Zend_Db_Expr('NULL'),
+            'host_notifications_enabled' => new Zend_Db_Expr('NULL'),
+            'host_is_flapping'           => new Zend_Db_Expr('NULL'),
+            'host_in_downtime'           => new Zend_Db_Expr('NULL'),
+            'service_handled',
+            'service_handled_wo_host',
+            'service_state',
+            'service_notifications_enabled',
+            'service_is_flapping',
+            'service_in_downtime',
+        );
+
+        if ($this->getOption('notification_periods') === true) {
+            $hostColumns['service_in_notification_period'] = new Zend_Db_Expr('NULL');
+            $serviceColumns['service_in_notification_period'] = 'service_in_notification_period';
+        }
+
+        $hosts = $this->createSubQuery('Hostgroup', $hostColumns);
+        // ignore empty hostgroups in this subquery
+        $hosts->setFilter(Filter::expression('ho.object_id', '>', 0));
+        $this->subQueries[] = $hosts;
+        $services = $this->createSubQuery('Hostgroup', $serviceColumns);
+        // ignore empty hostgroups in this subquery
+        $services->setFilter(Filter::expression('ho.object_id', '>', 0));
+        $this->subQueries[] = $services;
+        $this->summaryQuery = $this->db->select()->union(array($hosts, $services), Zend_Db_Select::SQL_UNION_ALL);
+        $this->select->from(array('hostgroupsummary' => $this->summaryQuery), array());
+        $this->group(array('hostgroup_name', 'hostgroup_alias'));
+        $this->joinedVirtualTables['hostgroupsummary'] = true;
+    }
+}
diff --git a/library/Toplevelview/Monitoring/IgnoredNotificationPeriods.php b/library/Toplevelview/Monitoring/IgnoredNotificationPeriods.php
new file mode 100644
index 0000000..4b9e94c
--- /dev/null
+++ b/library/Toplevelview/Monitoring/IgnoredNotificationPeriods.php
@@ -0,0 +1,49 @@
+<?php
+/* Copyright (C) 2019 Icinga Development Team <info@icinga.com> */
+
+namespace Icinga\Module\Toplevelview\Monitoring;
+
+trait IgnoredNotificationPeriods
+{
+    protected $ignoredNotificationPeriods = [];
+
+    public function ignoreNotificationPeriod($name)
+    {
+        $this->ignoredNotificationPeriods[$name] = true;
+        return $this;
+    }
+
+    /**
+     * @param string|array|iterable $list
+     *
+     * @return $this
+     */
+    public function ignoreNotificationPeriods($list)
+    {
+        if (is_string($list)) {
+            /** @var string $list */
+            $this->ignoredNotificationPeriods[$list] = true;
+        } else {
+            foreach ($list as $i) {
+                $this->ignoredNotificationPeriods[$i] = true;
+            }
+        }
+
+        return $this;
+    }
+
+    public function getIgnoredNotificationPeriods()
+    {
+        return array_keys($this->ignoredNotificationPeriods);
+    }
+
+    public function resetIgnoredNotificationPeriods()
+    {
+        $this->ignoredNotificationPeriods = [];
+    }
+
+    public function hasIgnoredNotifications()
+    {
+        return ! empty($this->ignoredNotificationPeriods);
+    }
+}
diff --git a/library/Toplevelview/Monitoring/Options.php b/library/Toplevelview/Monitoring/Options.php
new file mode 100644
index 0000000..75f739f
--- /dev/null
+++ b/library/Toplevelview/Monitoring/Options.php
@@ -0,0 +1,33 @@
+<?php
+/* Copyright (C) 2019 Icinga Development Team <info@icinga.com> */
+
+namespace Icinga\Module\Toplevelview\Monitoring;
+
+trait Options
+{
+    protected $options = [];
+
+    public function getOption($key)
+    {
+        if (array_key_exists($key, $this->options)) {
+            return $this->options[$key];
+        }
+
+        return null;
+    }
+
+    public function setOptions($options, $flush = false)
+    {
+        if ($flush) {
+            $this->options = [];
+        }
+
+        if (! empty($options)) {
+            foreach ($options as $k => $v) {
+                $this->options[$k] = $v;
+            }
+        }
+
+        return $this;
+    }
+}
diff --git a/library/Toplevelview/Monitoring/Servicestatus.php b/library/Toplevelview/Monitoring/Servicestatus.php
new file mode 100644
index 0000000..e43572f
--- /dev/null
+++ b/library/Toplevelview/Monitoring/Servicestatus.php
@@ -0,0 +1,38 @@
+<?php
+/* Copyright (C) 2017 Icinga Development Team <info@icinga.com> */
+
+namespace Icinga\Module\Toplevelview\Monitoring;
+
+use Icinga\Data\ConnectionInterface;
+use Icinga\Module\Monitoring\Backend\MonitoringBackend;
+use Icinga\Module\Monitoring\DataView\Servicestatus as IcingaServiceStatus;
+
+class Servicestatus extends IcingaServiceStatus
+{
+    /** @noinspection PhpMissingParentConstructorInspection */
+    /**
+     * @param ConnectionInterface $connection
+     * @param array|null          $columns
+     * @noinspection PhpMissingParentConstructorInspection
+     */
+    public function __construct(ConnectionInterface $connection, array $columns = null, $options = null)
+    {
+        /** @var MonitoringBackend $connection */
+        $this->connection = $connection;
+        $this->query = new ServicestatusQuery($connection->getResource(), $columns, $options);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getColumns()
+    {
+        return array_merge(
+            parent::getColumns(),
+            array(
+                //'service_in_notification_period',
+                'service_notification_period',
+            )
+        );
+    }
+}
diff --git a/library/Toplevelview/Monitoring/ServicestatusQuery.php b/library/Toplevelview/Monitoring/ServicestatusQuery.php
new file mode 100644
index 0000000..addee2f
--- /dev/null
+++ b/library/Toplevelview/Monitoring/ServicestatusQuery.php
@@ -0,0 +1,87 @@
+<?php
+/* Copyright (C) 2017 Icinga Development Team <info@icinga.com> */
+
+namespace Icinga\Module\Toplevelview\Monitoring;
+
+use Icinga\Module\Monitoring\Backend\Ido\Query\ServicestatusQuery as IcingaServicestatusQuery;
+
+/**
+ * Patched version of ServicestatusQuery
+ */
+class ServicestatusQuery extends IcingaServicestatusQuery
+{
+    use IgnoredNotificationPeriods;
+    use Options;
+
+    public function __construct($ds, $columns = null, $options = null)
+    {
+        $this->setOptions($options);
+        parent::__construct($ds, $columns);
+    }
+
+    public function init()
+    {
+        if (($periods = $this->getOption('ignored_notification_periods')) !== null) {
+            $this->ignoreNotificationPeriods($periods);
+        }
+
+        $patchedColumnMap = array(
+            'servicestatus'             => array(
+                'service_handled_wo_host' => 'CASE WHEN ss.problem_has_been_acknowledged > 0 THEN 1 ELSE 0 END',
+            ),
+            'servicenotificationperiod' => array(
+                'service_notification_period'    => 'ntpo.name1',
+                'service_in_notification_period' => '
+                    CASE WHEN ntpo.name1 IS NULL
+                        THEN 1
+                        ELSE CASE WHEN ntpr.timeperiod_id IS NOT NULL
+                            THEN 1
+                            ELSE 0
+                        END
+                    END',
+            ),
+        );
+
+        foreach ($patchedColumnMap as $table => $columns) {
+            foreach ($columns as $k => $v) {
+                $this->columnMap[$table][$k] = $v;
+            }
+        }
+
+        parent::init();
+    }
+
+    protected function joinServicenotificationperiod()
+    {
+        $extraJoinCond = '';
+
+        if ($this->hasIgnoredNotifications()) {
+            $extraJoinCond .= $this->db->quoteInto(
+                ' AND ntpo.name1 NOT IN (?)',
+                $this->getIgnoredNotificationPeriods()
+            );
+        }
+
+        $this->select->joinLeft(
+            ["ntp" => $this->prefix . 'timeperiods'],
+            'ntp.timeperiod_object_id = s.notification_timeperiod_object_id'
+            . ' AND ntp.config_type = 1 AND ntp.instance_id = s.instance_id',
+            []
+        );
+        $this->select->joinLeft(
+            ['ntpo' => $this->prefix . 'objects'],
+            'ntpo.object_id = s.notification_timeperiod_object_id'
+            . $extraJoinCond,
+            []
+        );
+        $this->select->joinLeft(
+            ['ntpr' => $this->prefix . 'timeperiod_timeranges'],
+            'ntpr.timeperiod_id = ntp.timeperiod_id
+                AND ntpr.day = DAYOFWEEK(CURRENT_DATE()) - 1
+                AND ntpr.start_sec < UNIX_TIMESTAMP() - UNIX_TIMESTAMP(CURRENT_DATE())
+                AND ntpr.end_sec > UNIX_TIMESTAMP() - UNIX_TIMESTAMP(CURRENT_DATE())
+            ',
+            []
+        );
+    }
+}
diff --git a/library/Toplevelview/Tree/TLVHostGroupNode.php b/library/Toplevelview/Tree/TLVHostGroupNode.php
new file mode 100644
index 0000000..a6dc7e4
--- /dev/null
+++ b/library/Toplevelview/Tree/TLVHostGroupNode.php
@@ -0,0 +1,134 @@
+<?php
+/* Copyright (C) 2017 Icinga Development Team <info@icinga.com> */
+
+namespace Icinga\Module\Toplevelview\Tree;
+
+use Icinga\Application\Benchmark;
+use Icinga\Exception\NotFoundError;
+use Icinga\Module\Toplevelview\Monitoring\Hostgroupsummary;
+
+class TLVHostGroupNode extends TLVIcingaNode
+{
+    protected $type = 'hostgroup';
+
+    protected $key = 'hostgroup';
+
+    protected static $titleKey = 'hostgroup';
+
+    public static function fetch(TLVTree $root)
+    {
+        Benchmark::measure('Begin fetching hostgroups');
+
+        if (! array_key_exists('hostgroup', $root->registeredObjects) or empty($root->registeredObjects['hostgroup'])) {
+            throw new NotFoundError('No hostgroups registered to fetch!');
+        }
+
+        $names = array_keys($root->registeredObjects['hostgroup']);
+
+        $options = [];
+        foreach (['notification_periods', 'host_never_unhandled', 'ignored_notification_periods'] as $opt) {
+            $options[$opt] = $root->get($opt);
+        }
+
+        // Note: this uses a patched version of Hostsgroupsummary / HostgroupsummaryQuery !
+        $hostgroups = new Hostgroupsummary(
+            $root->getBackend(),
+            array(
+                'hostgroup_name',
+                'hosts_down_handled',
+                'hosts_down_unhandled',
+                'hosts_total',
+                'hosts_unreachable_handled',
+                'hosts_unreachable_unhandled',
+                'hosts_downtime_handled',
+                'hosts_downtime_active',
+                'hosts_up',
+                'services_critical_handled',
+                'services_critical_unhandled',
+                'services_ok',
+                'services_total',
+                'services_unknown_handled',
+                'services_unknown_unhandled',
+                'services_warning_handled',
+                'services_warning_unhandled',
+                'services_downtime_handled',
+                'services_downtime_active',
+            ),
+            $options
+        );
+
+        $hostgroups->where('hostgroup_name', $names);
+
+        foreach ($hostgroups as $hostgroup) {
+            $root->registeredObjects['hostgroup'][$hostgroup->hostgroup_name] = $hostgroup;
+        }
+
+        Benchmark::measure('Finished fetching hostgroups');
+    }
+
+    public function getStatus()
+    {
+        if ($this->status === null) {
+            $this->status = $status = new TLVStatus();
+            $key = $this->getKey();
+
+            if (($data = $this->root->getFetched($this->type, $key)) !== null) {
+                $status->set('total', $data->hosts_total + $data->services_total);
+                $status->set('ok', $data->hosts_up + $data->services_ok);
+
+                $status->set('critical_handled', $data->services_critical_handled);
+                $status->set('critical_unhandled', $data->services_critical_unhandled);
+
+                if ($this->getRoot()->get('host_never_unhandled') === true) {
+                    $status->add(
+                        'critical_handled',
+                        $data->hosts_down_handled
+                        + $data->hosts_unreachable_handled
+                        + $data->hosts_down_unhandled
+                        + $data->hosts_unreachable_unhandled
+                    );
+                } else {
+                    $status->add(
+                        'critical_handled',
+                        $data->hosts_down_handled
+                        + $data->hosts_unreachable_handled
+                    );
+                    $status->add(
+                        'critical_unhandled',
+                        $data->hosts_down_unhandled
+                        + $data->hosts_unreachable_unhandled
+                    );
+                }
+
+                $status->set('warning_handled', $data->services_warning_handled);
+                $status->set('warning_unhandled', $data->services_warning_unhandled);
+                $status->set('unknown_handled', $data->services_unknown_handled);
+                $status->set('unknown_unhandled', $data->services_unknown_unhandled);
+
+                $status->set(
+                    'downtime_handled',
+                    $data->hosts_downtime_handled
+                    + $data->services_downtime_handled
+                );
+                $status->set(
+                    'downtime_active',
+                    $data->hosts_downtime_active
+                    + $data->services_downtime_active
+                );
+
+                // extra metadata for view
+                $status->setMeta('hosts_total', $data->hosts_total);
+                $status->setMeta(
+                    'hosts_unhandled',
+                    $data->hosts_down_unhandled
+                    + $data->hosts_unreachable_unhandled
+                );
+
+                $status->set('missing', 0);
+            } else {
+                $status->add('missing', 1);
+            }
+        }
+        return $this->status;
+    }
+}
diff --git a/library/Toplevelview/Tree/TLVHostNode.php b/library/Toplevelview/Tree/TLVHostNode.php
new file mode 100644
index 0000000..f03ae47
--- /dev/null
+++ b/library/Toplevelview/Tree/TLVHostNode.php
@@ -0,0 +1,81 @@
+<?php
+/* Copyright (C) 2017 Icinga Development Team <info@icinga.com> */
+
+namespace Icinga\Module\Toplevelview\Tree;
+
+use Icinga\Application\Benchmark;
+use Icinga\Exception\NotFoundError;
+
+class TLVHostNode extends TLVIcingaNode
+{
+    protected $type = 'host';
+
+    protected $key = 'host';
+
+    protected static $titleKey = 'host';
+
+    public static function fetch(TLVTree $root)
+    {
+        Benchmark::measure('Begin fetching hosts');
+
+        if (! array_key_exists('host', $root->registeredObjects) or empty($root->registeredObjects['host'])) {
+            throw new NotFoundError('No hosts registered to fetch!');
+        }
+
+        $names = array_keys($root->registeredObjects['host']);
+
+        $hosts = $root->getBackend()->select()
+            ->from('hoststatus', array(
+                'host_name',
+                'host_hard_state',
+                'host_handled',
+                'host_in_downtime',
+                'host_notifications_enabled',
+            ))
+            ->where('host_name', $names);
+
+        foreach ($hosts as $host) {
+            $root->registeredObjects['host'][$host->host_name] = $host;
+        }
+
+        Benchmark::measure('Finished fetching hosts');
+    }
+
+    public function getStatus()
+    {
+        if ($this->status === null) {
+            $this->status = $status = new TLVStatus();
+            $key = $this->getKey();
+
+            if (($data = $this->root->getFetched($this->type, $key)) !== null) {
+                $status->zero();
+                $status->add('total');
+
+                $state = $data->host_hard_state;
+
+                if ($data->host_in_downtime > 0 || $data->host_notifications_enabled === '0') {
+                    $status->add('downtime_active');
+                    $state = '10';
+                    $handled = '';
+                } elseif ($data->host_handled === '1' || $this->getRoot()->get('host_never_unhandled') === true) {
+                    $handled = '_handled';
+                } else {
+                    $handled = '_unhandled';
+                }
+
+                if ($state === '0') {
+                    $status->add('ok');
+                } elseif ($state === '1' || $state === '2') {
+                    $status->add('critical' . $handled);
+                } elseif ($state === '10') {
+                    $status->add('downtime_handled');
+                } else {
+                    $status->add('unknown_handled');
+                }
+            } else {
+                $status->add('missing', 1);
+            }
+        }
+        return $this->status;
+    }
+}
diff --git a/library/Toplevelview/Tree/TLVIcingaNode.php b/library/Toplevelview/Tree/TLVIcingaNode.php
new file mode 100644
index 0000000..82779b0
--- /dev/null
+++ b/library/Toplevelview/Tree/TLVIcingaNode.php
@@ -0,0 +1,25 @@
+<?php
+/* Copyright (C) 2017 Icinga Development Team <info@icinga.com> */
+
+namespace Icinga\Module\Toplevelview\Tree;
+
+use Icinga\Exception\NotImplementedError;
+
+class TLVIcingaNode extends TLVTreeNode
+{
+    protected static $canHaveChildren = false;
+
+    /**
+     * Interface to fetch data for the implementation
+     *
+     * Needs to be extended / replaced by class
+     *
+     * @param $root
+     *
+     * @throws NotImplementedError
+     */
+    public static function fetch(/** @noinspection PhpUnusedParameterInspection */ TLVTree $root)
+    {
+        throw new NotImplementedError('fetch() has not been implemented for %s', get_class(new static));
+    }
+}
diff --git a/library/Toplevelview/Tree/TLVServiceNode.php b/library/Toplevelview/Tree/TLVServiceNode.php
new file mode 100644
index 0000000..2036714
--- /dev/null
+++ b/library/Toplevelview/Tree/TLVServiceNode.php
@@ -0,0 +1,143 @@
+<?php
+/* Copyright (C) 2017 Icinga Development Team <info@icinga.com> */
+
+namespace Icinga\Module\Toplevelview\Tree;
+
+use Icinga\Application\Benchmark;
+use Icinga\Exception\NotFoundError;
+use Icinga\Module\Toplevelview\Monitoring\Servicestatus;
+
+class TLVServiceNode extends TLVIcingaNode
+{
+    protected $type = 'service';
+
+    protected $key = '{host}!{service}';
+
+    public function getTitle()
+    {
+        return sprintf(
+            '%s: %s',
+            $this->get('host'),
+            $this->get('service')
+        );
+    }
+
+    public function register()
+    {
+        // also register host, because that's what we fetch data with
+        $hostDummy = new TLVHostNode();
+        $this->root->registerObject($hostDummy->getType(), $this->get('host'), get_class($hostDummy));
+
+        // register myself
+        return parent::register();
+    }
+
+    public function getKey()
+    {
+        return sprintf('%s!%s', $this->properties['host'], $this->properties['service']);
+    }
+
+    public static function fetch(TLVTree $root)
+    {
+        Benchmark::measure('Begin fetching services');
+
+        if (! array_key_exists('service', $root->registeredObjects) or empty($root->registeredObjects['service'])) {
+            throw new NotFoundError('No services registered to fetch!');
+        }
+
+        $names = array_keys($root->registeredObjects['host']);
+
+        $columns = array(
+            'host_name',
+            'service_description',
+            'service_hard_state',
+            'service_handled',
+            'service_handled_wo_host',
+            'service_notifications_enabled',
+            'service_notification_period',
+            'service_is_flapping',
+            'service_in_downtime',
+        );
+
+        $options = [];
+        foreach (['notification_periods', 'host_never_unhandled', 'ignored_notification_periods'] as $opt) {
+            $options[$opt] = $root->get($opt);
+        }
+
+        if ($root->get('notification_periods') === true) {
+            $columns[] = 'service_in_notification_period';
+        }
+
+        // Note: this uses a patched version of Servicestatus / ServicestatusQuery !
+        $services = new Servicestatus($root->getBackend(), $columns, $options);
+        $services->where('host_name', $names);
+
+        foreach ($services as $service) {
+            $key = sprintf('%s!%s', $service->host_name, $service->service_description);
+            if (array_key_exists($key, $root->registeredObjects['service'])) {
+                $root->registeredObjects['service'][$key] = $service;
+            }
+        }
+
+        Benchmark::measure('Finished fetching services');
+    }
+
+    public function getStatus()
+    {
+        if ($this->status === null) {
+            $this->status = $status = new TLVStatus();
+            $key = $this->getKey();
+
+            if (($data = $this->root->getFetched($this->type, $key)) !== null) {
+                $status->zero();
+                $status->add('total');
+
+                $state = $data->service_hard_state;
+
+                if ($this->getRoot()->get('notification_periods') === true) {
+                    $notInPeriod = $data->service_in_notification_period === '0';
+                } else {
+                    $notInPeriod = false;
+                }
+
+                if ($this->getRoot()->get('host_never_unhandled') === true) {
+                    $isHandled = $data->service_handled_wo_host === '1';
+                } else {
+                    $isHandled = $data->service_handled === '1';
+                }
+                $isHandled = $isHandled || $data->service_is_flapping === '1';
+
+                if ($data->service_in_downtime > 0
+                    || $data->service_notifications_enabled === '0'
+                    || $notInPeriod
+                ) {
+                    $status->add('downtime_active');
+                    if ($state !== '0') {
+                        $state = '10';
+                    }
+                }
+
+                if ($isHandled) {
+                    $handled = '_handled';
+                } else {
+                    $handled = '_unhandled';
+                }
+
+                if ($state === '0' || $state === '99') {
+                    $status->add('ok', 1);
+                } elseif ($state === '1') {
+                    $status->add('warning' . $handled, 1);
+                } elseif ($state === '2') {
+                    $status->add('critical' . $handled, 1);
+                } elseif ($state === '10') {
+                    $status->add('downtime_handled');
+                } else {
+                    $status->add('unknown' . $handled, 1);
+                }
+            } else {
+                $status->add('missing', 1);
+            }
+        }
+        return $this->status;
+    }
+}
diff --git a/library/Toplevelview/Tree/TLVStatus.php b/library/Toplevelview/Tree/TLVStatus.php
new file mode 100644
index 0000000..afecc1e
--- /dev/null
+++ b/library/Toplevelview/Tree/TLVStatus.php
@@ -0,0 +1,115 @@
+<?php
+/* Copyright (C) 2017 Icinga Development Team <info@icinga.com> */
+
+namespace Icinga\Module\Toplevelview\Tree;
+
+class TLVStatus
+{
+    protected $properties = array(
+        'critical_unhandled' => null,
+        'critical_handled'   => null,
+        'warning_unhandled'  => null,
+        'warning_handled'    => null,
+        'unknown_unhandled'  => null,
+        'unknown_handled'    => null,
+        'downtime_handled'   => null,
+        'downtime_active'    => null,
+        'ok'                 => null,
+        'missing'            => null,
+        'total'              => null,
+    );
+
+    protected static $statusPriority = array(
+        'critical_unhandled',
+        'warning_unhandled',
+        'unknown_unhandled', // Note: old TLV ignored UNKNOWN basically
+        'critical_handled',
+        'warning_handled',
+        'unknown_handled',
+        'ok',
+        'downtime_handled',
+        'missing',
+    );
+
+    protected $meta = array();
+
+    public function merge(TLVStatus $status)
+    {
+        $properties = $status->getProperties();
+        foreach (array_keys($this->properties) as $key) {
+            if ($this->properties[$key] === null) {
+                $this->properties[$key] = $properties[$key];
+            } else {
+                $this->properties[$key] += $properties[$key];
+            }
+        }
+        return $this;
+    }
+
+    public function get($key)
+    {
+        return $this->properties[$key];
+    }
+
+    public function set($key, $value)
+    {
+        $this->properties[$key] = (int) $value;
+        return $this;
+    }
+
+    public function getProperties()
+    {
+        return $this->properties;
+    }
+
+    public function add($key, $value = 1)
+    {
+        if ($this->properties[$key] === null) {
+            $this->properties[$key] = 0;
+        }
+        $this->properties[$key] += (int) $value;
+        return $this;
+    }
+
+    public function zero()
+    {
+        foreach (array_keys($this->properties) as $key) {
+            $this->properties[$key] = 0;
+        }
+        return $this;
+    }
+
+    public function getOverall()
+    {
+        foreach (static::$statusPriority as $key) {
+            if ($this->properties[$key] !== null && $this->properties[$key] > 0) {
+                return $this->cssFriendly($key);
+            }
+        }
+        return 'missing';
+    }
+
+    protected function cssFriendly($key)
+    {
+        return str_replace('_', ' ', $key);
+    }
+
+    public function getMeta($key)
+    {
+        if (array_key_exists($key, $this->meta)) {
+            return $this->meta[$key];
+        } else {
+            return null;
+        }
+    }
+
+    public function getAllMeta()
+    {
+        return $this->meta;
+    }
+
+    public function setMeta($key, $value)
+    {
+        $this->meta[$key] = $value;
+    }
+}
diff --git a/library/Toplevelview/Tree/TLVTree.php b/library/Toplevelview/Tree/TLVTree.php
new file mode 100644
index 0000000..817d52c
--- /dev/null
+++ b/library/Toplevelview/Tree/TLVTree.php
@@ -0,0 +1,251 @@
+<?php
+/* Copyright (C) 2017 Icinga Development Team <info@icinga.com> */
+
+namespace Icinga\Module\Toplevelview\Tree;
+
+use Icinga\Application\Logger;
+use Icinga\Exception\IcingaException;
+use Icinga\Exception\NotFoundError;
+use Icinga\Exception\ProgrammingError;
+use Icinga\Module\Monitoring\Backend\MonitoringBackend;
+use Icinga\Module\Toplevelview\Util\Json;
+use Icinga\Module\Toplevelview\ViewConfig;
+use Icinga\Web\FileCache;
+use stdClass;
+
+class TLVTree extends TLVTreeNode
+{
+    protected static $titleKey = 'name';
+
+    public $registeredTypes = array();
+
+    public $registeredObjects = array();
+
+    protected $fetchedData = array();
+
+    protected $fetched = false;
+
+    protected $fetchTime;
+
+    protected $cacheLifetime = 60;
+
+    /**
+     * @var MonitoringBackend
+     */
+    protected $backend;
+
+    /**
+     * @var ViewConfig
+     */
+    protected $config;
+
+    public function getById($id)
+    {
+        $ids = explode('-', $id);
+        $currentNode = $this;
+
+        foreach ($ids as $i) {
+            $children = $currentNode->getChildren();
+            if (! empty($children) && array_key_exists($i, $children)) {
+                $currentNode = $children[$i];
+            } else {
+                throw new NotFoundError(
+                    'Could not find ID %s after %s for path %s',
+                    $i,
+                    $currentNode->getFullId(),
+                    $id
+                );
+            }
+        }
+
+        return $currentNode;
+    }
+
+    /**
+     * @return ViewConfig
+     */
+    public function getConfig()
+    {
+        return $this->config;
+    }
+
+    /**
+     * @param ViewConfig $config
+     *
+     * @return $this
+     */
+    public function setConfig(ViewConfig $config)
+    {
+        $this->config = $config;
+        return $this;
+    }
+
+    public function registerObject($type, $name, $class)
+    {
+        if (array_key_exists($type, $this->registeredTypes) && $this->registeredTypes[$type] !== $class) {
+            throw new ProgrammingError(
+                'Tried to register the same type by multiple classes: %s - %s - %s',
+                $type,
+                $this->registeredTypes[$type],
+                $class
+            );
+        }
+
+        $this->registeredTypes[$type] = $class;
+        $this->registeredObjects[$type][$name] = null;
+    }
+
+    protected function getCacheName()
+    {
+        $config = $this->getConfig();
+        return sprintf(
+            '%s-%s.json',
+            $config->getName(),
+            $config->getTextChecksum()
+        );
+    }
+
+    protected function loadCache()
+    {
+        if (($lifetime = $this->getCacheLifetime()) <= 0) {
+            return;
+        }
+
+        $cacheName = $this->getCacheName();
+        try {
+            $cache = FileCache::instance('toplevelview');
+            $currentTime = time();
+            $newerThan = $currentTime - $lifetime;
+
+            if ($cache->has($cacheName)) {
+                $cachedData = Json::decode($cache->get($cacheName));
+
+                if (property_exists($cachedData, 'data')
+                    && $cachedData->data !== null
+                    && property_exists($cachedData, 'ts')
+                    && $cachedData->ts <= $currentTime // too new maybe
+                    && $cachedData->ts > $newerThan // too old
+                ) {
+                    foreach ($cachedData->data as $type => $objects) {
+                        $this->registeredObjects[$type] = (array) $objects;
+                        $this->fetchedData[$type] = true;
+                    }
+
+                    $this->fetchTime = $cachedData->ts;
+                    $this->fetched = true;
+                }
+            }
+        } catch (IcingaException $e) {
+            Logger::error('Could not load from toplevelview cache %s: %s', $cacheName, $e->getMessage());
+        }
+    }
+
+    protected function storeCache()
+    {
+        if (($lifetime = $this->getCacheLifetime()) <= 0) {
+            return;
+        }
+
+        $cacheName = $this->getCacheName();
+        try {
+            $cache = FileCache::instance('toplevelview');
+
+            $cachedData = new stdClass;
+            $cachedData->ts = $this->fetchTime;
+            $cachedData->data = $this->registeredObjects;
+
+            $cache->store($cacheName, Json::encode($cachedData));
+        } catch (IcingaException $e) {
+            Logger::error('Could not store to toplevelview cache %s: %s', $cacheName, $e->getMessage());
+        }
+    }
+
+    protected function fetchType($type)
+    {
+        if (! array_key_exists($type, $this->registeredTypes)) {
+            throw new ProgrammingError('Type %s has not been registered', $type);
+        }
+
+        if (! array_key_exists($type, $this->fetchedData)) {
+            /** @var TLVIcingaNode $class */
+            $class = $this->registeredTypes[$type];
+            $class::fetch($this);
+            $this->fetchedData[$type] = true;
+        }
+
+        return $this;
+    }
+
+    protected function ensureFetched()
+    {
+        if ($this->fetched !== true) {
+            $this->loadCache();
+
+            if ($this->fetched !== true) {
+                foreach (array_keys($this->registeredTypes) as $type) {
+                    $this->fetchType($type);
+                }
+
+                $this->fetchTime = time();
+                $this->fetched = true;
+
+                $this->storeCache();
+            }
+        }
+
+        return $this;
+    }
+
+    public function getFetched($type, $key)
+    {
+        $this->ensureFetched();
+
+        if (array_key_exists($key, $this->registeredObjects[$type])
+            && $this->registeredObjects[$type][$key] !== null
+        ) {
+            return $this->registeredObjects[$type][$key];
+        } else {
+            return null;
+        }
+    }
+
+    public function getBackend()
+    {
+        return $this->backend;
+    }
+
+    public function setBackend(MonitoringBackend $backend)
+    {
+        $this->backend = $backend;
+        return $this;
+    }
+
+    /**
+     * @return int time
+     */
+    public function getFetchTime()
+    {
+        $this->ensureFetched();
+
+        return $this->fetchTime;
+    }
+
+    /**
+     * @return int seconds
+     */
+    public function getCacheLifetime()
+    {
+        return $this->cacheLifetime;
+    }
+
+    /**
+     * @param int $cacheLifetime In seconds
+     *
+     * @return $this
+     */
+    public function setCacheLifetime($cacheLifetime)
+    {
+        $this->cacheLifetime = $cacheLifetime;
+        return $this;
+    }
+}
diff --git a/library/Toplevelview/Tree/TLVTreeNode.php b/library/Toplevelview/Tree/TLVTreeNode.php
new file mode 100644
index 0000000..fd70e49
--- /dev/null
+++ b/library/Toplevelview/Tree/TLVTreeNode.php
@@ -0,0 +1,334 @@
+<?php
+/* Copyright (C) 2017 Icinga Development Team <info@icinga.com> */
+
+namespace Icinga\Module\Toplevelview\Tree;
+
+use Icinga\Application\Benchmark;
+use Icinga\Data\Tree\TreeNode;
+use Icinga\Exception\ConfigurationError;
+use Icinga\Exception\NotImplementedError;
+use Icinga\Exception\ProgrammingError;
+
+class TLVTreeNode extends TreeNode
+{
+    /**
+     * @var string
+     */
+    protected $type = 'node';
+
+    protected $key = null;
+
+    /**
+     * @var TLVTree
+     */
+    protected $root;
+
+    /**
+     * @var TLVTreeNode
+     */
+    protected $parent;
+
+    /**
+     * @var string
+     */
+    protected $fullId;
+
+    /**
+     * @var TLVStatus
+     */
+    protected $status;
+
+    /**
+     * @var array
+     */
+    protected $properties = array();
+
+    protected static $canHaveChildren = true;
+
+    /**
+     * The key which represents the display title
+     *
+     * @var string
+     */
+    protected static $titleKey = 'name';
+
+    /**
+     * Mapping types to its implementation class
+     *
+     * @var array
+     */
+    protected static $typeMap = array(
+        'host'      => 'Icinga\\Module\\Toplevelview\\Tree\\TLVHostNode',
+        'service'   => 'Icinga\\Module\\Toplevelview\\Tree\\TLVServiceNode',
+        'hostgroup' => 'Icinga\\Module\\Toplevelview\\Tree\\TLVHostGroupNode',
+    );
+
+    /**
+     * Mapping keys to a type
+     *
+     * Warning: order is important when keys overlap!
+     *
+     * @var array
+     */
+    protected static $typeKeyMap = array(
+        'service'   => array('host', 'service'),
+        'host'      => 'host',
+        'hostgroup' => 'hostgroup',
+    );
+
+    /**
+     * @param                  $array
+     * @param TLVTreeNode|null $parent
+     * @param TLVTree          $root
+     *
+     * @return static
+     *
+     * @throws NotImplementedError
+     * @throws ProgrammingError
+     */
+    public static function fromArray($array, TLVTreeNode $parent = null, TLVTree $root = null)
+    {
+        if ($root === null) {
+            Benchmark::measure('Begin loading TLVTree from array');
+        }
+
+        // try to detect type
+        if (! array_key_exists('type', $array)) {
+            foreach (self::$typeKeyMap as $type => $keys) {
+                if (! is_array($keys)) {
+                    $keys = array($keys);
+                }
+                $matched = false;
+                foreach ($keys as $k) {
+                    if (array_key_exists($k, $array)) {
+                        $matched = true;
+                    } else {
+                        continue 2;
+                    }
+                }
+                // if all keys are present
+                if ($matched === true) {
+                    $array['type'] = $type;
+                    break;
+                }
+            }
+        }
+
+        if (array_key_exists('type', $array)) {
+            $type = $array['type'];
+            if (array_key_exists($type, self::$typeMap)) {
+                $node = new self::$typeMap[$type];
+                $node->type = $type;
+            } else {
+                throw new NotImplementedError('Could not find type "%s" for %s', $type, var_export($array, true));
+            }
+        } elseif ($root === null) {
+            $node = new static;
+        } else {
+            $node = new self;
+        }
+
+        if ($root === null) {
+            $node->root = true; // is root
+            $node->parent = null;
+            $root = $parent = $node;
+        } elseif ($parent === null) {
+            throw new ProgrammingError('You must specify the direct parent!');
+        } else {
+            $node->root = $root;
+            $node->parent = $parent;
+        }
+
+        foreach ($array as $key => $value) {
+            if ($key !== 'children') {
+                $node->properties[$key] = $value;
+            } elseif (is_array($value)) { // only array values for children
+                foreach ($value as $i => $child) {
+                    $childNode = self::fromArray($child, $node, $root);
+                    $childNode->id = $i;
+                    $node->appendChild($childNode);
+                }
+            }
+        }
+
+        $node->register();
+
+        if ($root === $node) {
+            Benchmark::measure('Finished loading TLVTree from array');
+        }
+
+        return $node;
+    }
+
+    /**
+     * Retrieve all objects as breadcrumb
+     *
+     * @param array $list for recursion
+     *
+     * @return TLVTreeNode[]
+     */
+    public function getBreadCrumb(&$list = array())
+    {
+        array_unshift($list, $this);
+        if ($this->parent !== $this->root) {
+            $this->parent->getBreadCrumb($list);
+        }
+        return $list;
+    }
+
+    /**
+     *
+     * @return mixed|string
+     */
+    public function getFullId()
+    {
+        if ($this->fullId === null) {
+            $id = (string) $this->id;
+            if ($this->parent !== $this->root) {
+                $this->fullId = $this->parent->getFullId() . '-' . $id;
+            } else {
+                $this->fullId = $id;
+            }
+        }
+        return $this->fullId;
+    }
+
+    /**
+     * @return mixed
+     */
+    public function getType()
+    {
+        return $this->type;
+    }
+
+    public function getProperties()
+    {
+        return $this->properties;
+    }
+
+    public function setProperties($array)
+    {
+        $this->properties = $array;
+        return $this;
+    }
+
+    public function get($key)
+    {
+        if (array_key_exists($key, $this->properties)) {
+            return $this->properties[$key];
+        } else {
+            return null;
+        }
+    }
+
+    public function set($key, $value)
+    {
+        $this->properties[$key] = $value;
+        return $this;
+    }
+
+    public function getTitle()
+    {
+        if (array_key_exists(static::$titleKey, $this->properties)) {
+            return $this->properties[static::$titleKey];
+        } else {
+            return null;
+        }
+    }
+
+    public function getKey()
+    {
+        if ($this->key === null) {
+            throw new ProgrammingError('Can not get key for %s', get_class($this));
+        }
+
+        if (array_key_exists($this->key, $this->properties)) {
+            return $this->properties[$this->key];
+        } else {
+            throw new ProgrammingError(
+                'Can not retrieve key for %s in %s',
+                $this->key,
+                get_class($this)
+            );
+        }
+    }
+
+    /**
+     * @return TLVTree
+     */
+    public function getRoot()
+    {
+        return $this->root;
+    }
+
+    /**
+     * @return TLVTreeNode
+     */
+    public function getParent()
+    {
+        return $this->parent;
+    }
+
+    /**
+     * @return TLVTreeNode[]
+     */
+    public function getChildren()
+    {
+        return parent::getChildren();
+    }
+
+    /**
+     * Append a child node as the last child of this node
+     *
+     * @param   TreeNode $child The child to append
+     *
+     * @return $this
+     *
+     * @throws ConfigurationError When node does not allow children
+     */
+    public function appendChild(TreeNode $child)
+    {
+        if (static::$canHaveChildren === true) {
+            $this->children[] = $child;
+        } else {
+            throw new ConfigurationError('Can not add children below type %s', $this->type);
+        }
+        return $this;
+    }
+
+    protected function register()
+    {
+        if ($this->type !== 'node') {
+            $this->root->registerObject($this->type, $this->getKey(), get_class($this));
+        }
+        return $this;
+    }
+
+    /**
+     * @return TLVStatus
+     * @throws ProgrammingError
+     */
+    public function getStatus()
+    {
+        if (static::$canHaveChildren === true) {
+            if ($this->status === null) {
+                $this->status = new TLVStatus;
+
+                $missed = true;
+                foreach ($this->getChildren() as $child) {
+                    $this->status->merge($child->getStatus());
+                    $missed = false;
+                }
+
+                // Note: old TLV does not count an empty branch as missing...
+                if ($missed) {
+                    $this->status->add('missing', 1);
+                }
+            }
+
+            return $this->status;
+        } else {
+            throw new ProgrammingError('getStatus() needs to be implemented for %s', get_class($this));
+        }
+    }
+}
diff --git a/library/Toplevelview/Util/Json.php b/library/Toplevelview/Util/Json.php
new file mode 100644
index 0000000..cad6b3e
--- /dev/null
+++ b/library/Toplevelview/Util/Json.php
@@ -0,0 +1,34 @@
+<?php
+
+namespace Icinga\Module\Toplevelview\Util;
+
+use Icinga\Exception\Json\JsonEncodeException;
+use Icinga\Util\Json as IcingaJson;
+
+class Json extends IcingaJson
+{
+    /**
+     * {@link json_encode()} wrapper
+     *
+     * @param   mixed   $value
+     * @param   int     $options
+     * @param   int     $depth
+     *
+     * @return  string
+     * @throws  JsonEncodeException
+     */
+    public static function encode($value, $options = 0, $depth = 512)
+    {
+        if (version_compare(phpversion(), '5.4.0', '<')) {
+            $encoded = json_encode($value);
+        } elseif (version_compare(phpversion(), '5.5.0', '<')) {
+            $encoded = json_encode($value, $options);
+        } else {
+            $encoded = json_encode($value, $options, $depth);
+        }
+        if (json_last_error() !== JSON_ERROR_NONE) {
+            throw new JsonEncodeException('%s: %s', static::lastErrorMsg(), var_export($value, true));
+        }
+        return $encoded;
+    }
+}
diff --git a/library/Toplevelview/ViewConfig.php b/library/Toplevelview/ViewConfig.php
new file mode 100644
index 0000000..dc73b7f
--- /dev/null
+++ b/library/Toplevelview/ViewConfig.php
@@ -0,0 +1,488 @@
+<?php
+/* Copyright (C) 2017 Icinga Development Team <info@icinga.com> */
+
+namespace Icinga\Module\Toplevelview;
+
+use Icinga\Application\Benchmark;
+use Icinga\Application\Icinga;
+use Icinga\Exception\InvalidPropertyException;
+use Icinga\Exception\NotImplementedError;
+use Icinga\Exception\NotReadableError;
+use Icinga\Exception\NotWritableError;
+use Icinga\Exception\ProgrammingError;
+use Icinga\Module\Toplevelview\Tree\TLVTree;
+use Icinga\Util\DirectoryIterator;
+use Icinga\Web\Session;
+
+class ViewConfig
+{
+    const FORMAT_YAML = 'yml';
+    const SESSION_PREFIX = 'toplevelview_view_';
+
+    protected $config_dir;
+
+    protected $name;
+
+    protected $format;
+
+    protected $file_path;
+
+    protected $view;
+
+    protected $raw;
+
+    protected $tree;
+
+    protected $hasBeenLoaded = false;
+    protected $hasBeenLoadedFromSession = false;
+
+    /**
+     * Content of the file
+     *
+     * @var string
+     */
+    protected $text;
+
+    protected $textChecksum;
+
+    /**
+     * @param             $name
+     * @param string|null $config_dir
+     * @param string      $format
+     *
+     * @return static
+     */
+    public static function loadByName($name, $config_dir = null, $format = self::FORMAT_YAML)
+    {
+        $object = new static;
+        $object
+            ->setName($name)
+            ->setConfigDir($config_dir)
+            ->setFormat($format)
+            ->load();
+
+        return $object;
+    }
+
+    /**
+     * @param string|null $config_dir
+     * @param string      $format
+     *
+     * @return static[]
+     */
+    public static function loadAll($config_dir = null, $format = self::FORMAT_YAML)
+    {
+        $suffix = '.' . $format;
+
+        $config_dir = static::configDir($config_dir);
+        $directory = new DirectoryIterator($config_dir, $suffix);
+
+        $views = array();
+        foreach ($directory as $name => $path) {
+            if (is_dir($path)) {
+                // no not descend and ignore directories
+                continue;
+            }
+            $name = basename($name, $suffix);
+            $views[$name] = static::loadByName($name, $config_dir, $format);
+        }
+
+        // try to load from session
+        $len = strlen(self::SESSION_PREFIX);
+        foreach (static::session()->getAll() as $k => $v) {
+            if (substr($k, 0, $len) === self::SESSION_PREFIX) {
+                $name = substr($k, $len);
+                if (! array_key_exists($name, $views)) {
+                    $views[$name] = static::loadByName($name, $config_dir, $format);
+                }
+            }
+        }
+
+        ksort($views);
+
+        return $views;
+    }
+
+    /**
+     * @return string
+     */
+    public function getFilePath()
+    {
+        if ($this->file_path === null) {
+            if ($this->format === null) {
+                throw new ProgrammingError('format not set!');
+            }
+            $this->file_path = $this->getConfigDir() . DIRECTORY_SEPARATOR . $this->name . '.' . $this->format;
+        }
+        return $this->file_path;
+    }
+
+    /**
+     * @param string $file_path
+     *
+     * @return $this
+     */
+    public function setFilePath($file_path)
+    {
+        $this->file_path = $file_path;
+        return $this;
+    }
+
+    /**
+     * @return $this
+     */
+    public function load()
+    {
+        if ($this->text === null) {
+            $this->loadFromSession();
+        }
+        if ($this->text === null) {
+            $this->loadFromFile();
+        }
+        return $this;
+    }
+
+    public function loadFromFile()
+    {
+        $file_path = $this->getFilePath();
+        $this->text = file_get_contents($file_path);
+        if ($this->text === false) {
+            throw new NotReadableError('Could not read file %s', $file_path);
+        }
+        $this->view = null;
+        $this->hasBeenLoadedFromSession = false;
+        $this->hasBeenLoaded = true;
+        return $this;
+    }
+
+    /**
+     * @return string
+     */
+    public function getText()
+    {
+        return $this->text;
+    }
+
+    public function getTextChecksum()
+    {
+        if ($this->textChecksum === null) {
+            $this->textChecksum = sha1($this->text);
+        }
+        return $this->textChecksum;
+    }
+
+    /**
+     * @param $text
+     *
+     * @return $this
+     */
+    public function setText($text)
+    {
+        $this->text = $text;
+        $this->textChecksum = null;
+        $this->raw = null;
+        $this->tree = null;
+        return $this;
+    }
+
+    protected function writeFile($path, $content, $mode = '0660')
+    {
+        $existing = file_exists($path);
+        if (file_put_contents($path, $content) === false) {
+            throw new NotWritableError('Could not save to %s', $path);
+        }
+
+        if ($existing === false) {
+            $octalMode = intval($mode, 8);
+            if ($mode !== null && false === @chmod($path, $octalMode)) {
+                throw new NotWritableError('Failed to set file mode "%s" on file "%s"', $mode, $path);
+            }
+        }
+    }
+
+    protected function storeBackup($force = false)
+    {
+        $backupDir = $this->getConfigBackupDir();
+
+        $this->ensureConfigDir($backupDir);
+
+        $ts = (string) time();
+        $backup = $backupDir . DIRECTORY_SEPARATOR . $ts . '.' . $this->format;
+
+        if (file_exists($backup)) {
+            throw new ProgrammingError('History file with timestamp already present: %s', $backup);
+        }
+
+        $existingFile = $this->getFilePath();
+        $oldText = file_get_contents($existingFile);
+        if ($oldText === false) {
+            throw new NotReadableError('Could not read file %s', $existingFile);
+        }
+
+        // only save backup if changed or forced
+        if ($force || $oldText !== $this->text) {
+            $this->writeFile($backup, $oldText);
+        }
+    }
+
+    public function store()
+    {
+        $config_dir = $this->getConfigDir();
+        $file_path = $this->getFilePath();
+
+        $this->ensureConfigDir($config_dir);
+
+        // ensure to save history
+        if (file_exists($file_path)) {
+            $this->storeBackup();
+        }
+
+        $this->writeFile($file_path, $this->text);
+
+        $this->clearSession();
+        return $this;
+    }
+
+    /**
+     * @return string
+     * @throws ProgrammingError When dir is not yet set
+     */
+    public function getConfigDir()
+    {
+        if ($this->config_dir === null) {
+            throw new ProgrammingError('config_dir not yet set!');
+        }
+        return $this->config_dir;
+    }
+
+    /**
+     * @return string
+     */
+    public function getConfigBackupDir()
+    {
+        return $this->getConfigDir() . DIRECTORY_SEPARATOR . $this->name;
+    }
+
+    /**
+     * @param string $config_dir
+     *
+     * @return $this
+     * @throws NotReadableError
+     */
+    public function setConfigDir($config_dir = null)
+    {
+        $this->config_dir = static::configDir($config_dir);
+        $this->file_path = null;
+        return $this;
+    }
+
+    protected static function ensureConfigDir($path, $mode = '2770')
+    {
+        if (! file_exists($path)) {
+            if (mkdir($path) !== true) {
+                throw new NotWritableError(
+                    'Config path did not exit, and it could not be created: %s',
+                    $path
+                );
+            }
+
+            $octalMode = intval($mode, 8);
+            if ($mode !== null && false === @chmod($path, $octalMode)) {
+                throw new NotWritableError('Failed to set file mode "%s" on file "%s"', $mode, $path);
+            }
+        }
+    }
+
+    public static function configDir($config_dir = null)
+    {
+        $config_dir_module = Icinga::app()->getModuleManager()->getModule('toplevelview')->getConfigDir();
+        if ($config_dir === null) {
+            $config_dir = $config_dir_module . DIRECTORY_SEPARATOR . 'views';
+        }
+
+        static::ensureConfigDir($config_dir_module);
+        static::ensureConfigDir($config_dir);
+
+        return $config_dir;
+    }
+
+    /**
+     * @return mixed
+     */
+    public function getName()
+    {
+        return $this->name;
+    }
+
+    /**
+     * @param mixed $name
+     *
+     * @return $this
+     */
+    public function setName($name)
+    {
+        $this->name = $name;
+        $this->file_path = null;
+        return $this;
+    }
+
+    /**
+     * @return string
+     */
+    public function getFormat()
+    {
+        return $this->format;
+    }
+
+    /**
+     * @param string $format
+     *
+     * @return $this
+     */
+    public function setFormat($format)
+    {
+        $this->format = $format;
+        $this->file_path = null;
+        return $this;
+    }
+
+    public function getMeta($key)
+    {
+        $this->ensureParsed();
+        if ($key !== 'children' && array_key_exists($key, $this->raw)) {
+            return $this->raw[$key];
+        } else {
+            return null;
+        }
+    }
+
+    public function setMeta($key, $value)
+    {
+        if ($key === 'children') {
+            throw new ProgrammingError('You can not edit children here!');
+        }
+        $this->raw[$key] = $value;
+        return $this;
+    }
+
+    public function getMetaData()
+    {
+        $this->ensureParsed();
+        $data = array();
+        foreach ($this->raw as $key => $value) {
+            if ($key !== 'children') {
+                $data[$key] = $value;
+            }
+        }
+        return $data;
+    }
+
+    protected function ensureParsed()
+    {
+        if ($this->raw === null) {
+            Benchmark::measure('Begin parsing YAML document');
+
+            $text = $this->getText();
+            if ($text === null) {
+                // new ViewConfig
+                $this->raw = array();
+            } elseif ($this->format == self::FORMAT_YAML) {
+                // TODO: use stdClass instead of Array?
+                $this->raw = yaml_parse($text);
+                if (! is_array($this->raw)) {
+                    throw new InvalidPropertyException('Could not parse YAML config!');
+                }
+            } else {
+                throw new NotImplementedError("Unknown format '%s'", $this->format);
+            }
+
+            Benchmark::measure('Finished parsing YAML document');
+        }
+    }
+
+    /**
+     * Loads the Tree for this configuration
+     *
+     * @return TLVTree
+     */
+    public function getTree()
+    {
+        if ($this->tree === null) {
+            $this->ensureParsed();
+            $this->tree = $tree = TLVTree::fromArray($this->raw);
+            $tree->setConfig($this);
+        }
+        return $this->tree;
+    }
+
+    protected function getSessionVarName()
+    {
+        return self::SESSION_PREFIX . $this->name;
+    }
+
+    public static function session()
+    {
+        // TODO: is this CLI safe?
+        return Session::getSession();
+    }
+
+    public function loadFromSession()
+    {
+        if (($sessionConfig = $this->session()->get($this->getSessionVarName())) !== null) {
+            $this->text = $sessionConfig;
+            $this->hasBeenLoadedFromSession = true;
+            $this->hasBeenLoaded = true;
+        }
+        return $this;
+    }
+
+    public function clearSession()
+    {
+        $this->session()->delete($this->getSessionVarName());
+    }
+
+    public function storeToSession()
+    {
+        $this->session()->set($this->getSessionVarName(), $this->text);
+    }
+
+    /**
+     * @return bool
+     */
+    public function hasBeenLoadedFromSession()
+    {
+        return $this->hasBeenLoadedFromSession;
+    }
+
+    /**
+     * @return bool
+     */
+    public function hasBeenLoaded()
+    {
+        return $this->hasBeenLoaded;
+    }
+
+    public function __clone()
+    {
+        $this->name = null;
+        $this->raw = null;
+        $this->tree = null;
+
+        $this->hasBeenLoaded = false;
+        $this->hasBeenLoadedFromSession = false;
+    }
+
+    public function delete()
+    {
+        $file_path = $this->getFilePath();
+
+        $this->clearSession();
+
+        if (file_exists($file_path)) {
+            $this->storeBackup(true);
+            unlink($file_path);
+        }
+
+        return $this;
+    }
+}
diff --git a/library/Toplevelview/Web/Controller.php b/library/Toplevelview/Web/Controller.php
new file mode 100644
index 0000000..c010cd7
--- /dev/null
+++ b/library/Toplevelview/Web/Controller.php
@@ -0,0 +1,53 @@
+<?php
+/* Copyright (C) 2017 Icinga Development Team <info@icinga.com> */
+
+namespace Icinga\Module\Toplevelview\Web;
+
+use Icinga\Application\Icinga;
+use Icinga\Exception\ConfigurationError;
+use Icinga\Exception\IcingaException;
+use Icinga\Module\Monitoring\Backend\MonitoringBackend;
+use Icinga\Web\Controller as IcingaController;
+
+class Controller extends IcingaController
+{
+    /** @var  MonitoringBackend */
+    protected $monitoringBackend;
+
+    public function init()
+    {
+        parent::init();
+
+        if (! extension_loaded('yaml')) {
+            throw new ConfigurationError('You need the PHP extension "yaml" in order to use TopLevelView');
+        }
+    }
+
+    /**
+     * Retrieves the Icinga MonitoringBackend
+     *
+     * @param string|null $name
+     *
+     * @return MonitoringBackend
+     * @throws IcingaException When monitoring is not enabled
+     */
+    protected function monitoringBackend($name = null)
+    {
+        if ($this->monitoringBackend === null) {
+            if (! Icinga::app()->getModuleManager()->hasEnabled('monitoring')) {
+                throw new IcingaException('The module "monitoring" must be enabled and configured!');
+            }
+            $this->monitoringBackend = MonitoringBackend::instance($name);
+        }
+        return $this->monitoringBackend;
+    }
+
+    protected function setViewScript($name, $controller = null)
+    {
+        if ($controller !== null) {
+            $name = sprintf('%s/%s', $controller, $name);
+        }
+        $this->_helper->viewRenderer->setNoController(true);
+        $this->_helper->viewRenderer->setScriptAction($name);
+    }
+}
diff --git a/module.info b/module.info
new file mode 100644
index 0000000..c41b8a4
--- /dev/null
+++ b/module.info
@@ -0,0 +1,9 @@
+Module: toplevelview
+Version: 0.3.3
+Depends: monitoring>=2.5.0
+Description: Top Level View
+ Top Level View is a hierarchy based status view for Icinga Web 2.
+
+ You can define a hierarchical structure containing hosts, services and
+ hostgroups. And the view presents you an overview of the overall status
+ of the sub-hierarchies.
diff --git a/phpcs.xml b/phpcs.xml
new file mode 100644
index 0000000..1513449
--- /dev/null
+++ b/phpcs.xml
@@ -0,0 +1,42 @@
+<?xml version="1.0"?>
+<ruleset name="PHP_CodeSniffer">
+    <description>Sniff our code a while</description>
+
+    <file>configuration.php</file>
+    <!--<file>run.php</file>-->
+    <file>application/</file>
+    <file>library/</file>
+
+    <exclude-pattern>vendor/*</exclude-pattern>
+
+    <arg value="wps"/>
+    <arg name="colors" />
+    <arg name="report-width" value="auto" />
+    <arg name="report-full" />
+    <arg name="report-gitblame" />
+    <arg name="report-summary" />
+    <arg name="encoding" value="UTF-8" />
+
+    <!--
+    <rule ref="PEAR"/>
+    -->
+
+    <rule ref="PSR2">
+        <exclude name="PEAR.Commenting.FileComment.Missing"/>
+        <exclude name="PEAR.Commenting.ClassComment.Missing"/>
+        <exclude name="PEAR.Commenting.FunctionComment.Missing"/>
+    </rule>
+
+    <rule ref="PSR1.Classes.ClassDeclaration.MissingNamespace">
+        <exclude-pattern>*/application/views/helpers/*</exclude-pattern>
+    </rule>
+    <rule ref="Squiz.Classes.ValidClassName.NotCamelCaps">
+        <exclude-pattern>*/application/views/helpers/*</exclude-pattern>
+    </rule>
+
+    <rule ref="Generic.Files.LineLength">
+        <properties>
+            <property name="lineLimit" value="120"/>
+        </properties>
+    </rule>
+</ruleset>
diff --git a/public/css/module.less b/public/css/module.less
new file mode 100644
index 0000000..659984d
--- /dev/null
+++ b/public/css/module.less
@@ -0,0 +1,537 @@
+/* Copyright (C) 2017 Icinga Development Team <info@icinga.com> */
+
+.tlv-overview-tiles .tlv-overview-tile {
+  display: block;
+
+  float: left;
+
+  padding: 1em;
+  margin: 1em;
+
+  position: relative;
+
+  width: 20em;
+  height: 10em;
+
+  border: 1px solid @gray;
+
+  text-decoration: none;
+
+  .tlv-title {
+    font-weight: bold;
+    font-size: 1.3em;
+  }
+
+  .tlv-name {
+    color: @gray;
+  }
+
+  .action-links {
+    position: absolute;
+    right: 0;
+    bottom: 1em;
+  }
+
+  .unsaved {
+    display: inline-block;
+    padding: 0.2em;
+
+    font-weight: bold;
+
+    background: @tlv-color-warning-bg;
+    color: @tlv-color-warning-fg;
+  }
+}
+
+// see Icinga Web 2: public/css/icinga/base.less
+//@import '../../vendor/icingaweb2/public/css/icinga/base.less';
+@tlv-color-critical-bg: @color-critical;
+@tlv-color-critical-fg: white;
+@tlv-color-critical-handled-bg: #FFCCBC; // Material Design Deep Orange 100
+@tlv-color-critical-handled-fg: #6d4148;
+@tlv-color-warning-bg: @color-warning;
+@tlv-color-warning-fg: #6d572b;
+@tlv-color-warning-handled-bg: #FFF9C4; // Material Design Yellow 100
+@tlv-color-warning-handled-fg: #6d572b;
+@tlv-color-unknown-bg: @color-unknown;
+@tlv-color-unknown-fg: white;
+@tlv-color-unknown-handled-bg: #E1BEE7; // Material Design Purple 100
+@tlv-color-unknown-handled-fg: #57326d;
+@tlv-color-ok-bg: @color-ok;
+@tlv-color-ok-fg: white;
+@tlv-color-downtime-bg: @color-ok;
+@tlv-color-downtime-fg: #333;
+@tlv-color-downtime-handled-bg: @color-ok;
+@tlv-color-downtime-handled-fg: #ffff00;
+@tlv-color-pending-bg: @color-pending;
+@tlv-color-pending-fg: #32486d;
+@tlv-color-missing-bg: #ccc;
+@tlv-color-missing-fg: #333;
+
+.tlv-status-tile {
+  &.critical, &.down {
+    background-color: @tlv-color-critical-bg;
+    color: @tlv-color-critical-fg;
+  }
+  &.critical.handled, &.down.handled {
+    background-color: @tlv-color-critical-handled-bg;
+    color: @tlv-color-critical-handled-fg;
+  }
+  &.unknown, &.unreachable {
+    background-color: @tlv-color-unknown-bg;
+    color: @tlv-color-unknown-fg;
+  }
+  &.unknown.handled, &.unreachable.handled {
+    background-color: @tlv-color-unknown-handled-bg;
+    color: @tlv-color-unknown-handled-fg;
+  }
+  &.warning {
+    background-color: @tlv-color-warning-bg;
+    color: @tlv-color-warning-fg;
+  }
+  &.warning.handled {
+    background-color: @tlv-color-warning-handled-bg;
+    color: @tlv-color-warning-handled-fg;
+  }
+  &.ok, &.up {
+    background-color: @tlv-color-ok-bg;
+    color: @tlv-color-ok-fg;
+  }
+  &.downtime.active {
+    background-color: @tlv-color-downtime-bg;
+    color: @tlv-color-downtime-fg;
+  }
+  &.downtime.handled {
+    background-color: @tlv-color-downtime-handled-bg;
+    color: @tlv-color-downtime-handled-fg;
+  }
+  &.pending {
+    background-color: @tlv-color-pending-bg;
+    color: @tlv-color-pending-fg;
+  }
+  &.missing {
+    background-color: @tlv-color-missing-bg;
+    color: @tlv-color-missing-fg;
+  }
+  &.total {
+    background-color: @icinga-blue;
+    color: @text-color-on-icinga-blue;
+  }
+}
+
+.tlv-status-section {
+  &.critical, &.down {
+    border-color: @tlv-color-critical-bg;
+  }
+  &.critical.handled, &.down.handled {
+    border-color: @tlv-color-critical-handled-bg;
+  }
+  &.unknown, &.unreachable {
+    border-color: @tlv-color-unknown-bg;
+  }
+  &.unknown.handled, &.unreachable.handled {
+    border-color: @tlv-color-unknown-handled-bg;
+  }
+  &.warning {
+    border-color: @tlv-color-warning-bg;
+  }
+  &.warning.handled {
+    border-color: @tlv-color-warning-handled-bg;
+  }
+  &.ok, &.up {
+    border-color: @tlv-color-ok-bg;
+  }
+  &.pending {
+    border-color: @tlv-color-pending-bg;
+  }
+  &.missing {
+    border-color: @tlv-color-missing-bg;
+  }
+}
+
+.tlv-content {
+  position: relative;
+  width: 100%;
+  height: 100%;
+
+  padding-right: 0 !important;
+  padding-left: 0 !important;
+
+  .tlv-header {
+    margin: 0 12px;
+    z-index: 99;
+  }
+}
+
+.tlv-header {
+  position: relative;
+
+  line-height: 2em;
+  height: 2em;
+
+  h1 {
+    display: inline-block;
+    border: none;
+    margin: 0 0.5em 0 0;
+  }
+
+  .last-refresh {
+    display: inline-block;
+    font-weight: bold;
+    margin: 0 0.5em;
+  }
+
+  .action-links {
+    display: inline-block;
+    margin: 0 0.5em;
+  }
+
+  .badges {
+    display: inline-block;
+    position: absolute;
+    right: 0;
+
+    font-size: 1.2em;
+
+    .badge {
+      margin-left: 0.2em;
+    }
+  }
+}
+
+.tlv-view-tiles {
+  position: relative;
+
+  clear: both;
+  display: flex;
+  flex-wrap: wrap;
+  align-content: stretch;
+
+  height: 100%;
+
+  margin-top: -2em;
+  padding-top: 2em;
+
+  .tlv-tiles {
+    display: flex;
+    flex-wrap: wrap;
+    align-content: stretch;
+    flex-grow: 1;
+
+    width: 100%;
+    height: 100%;
+
+    margin-top: -2.3em; // - padding title - margin tile
+    padding-top: 2.3em; // + padding title + margin tile
+  }
+
+  .tlv-tile {
+    margin: 0.1em;
+    flex-grow: 1;
+
+    overflow: hidden;
+
+    .badges {
+      display: inline-block;
+
+      font-weight: normal;
+      margin-left: 0.2em;
+
+      .badge {
+        font-size: 0.7em;
+
+        border: 0.1em solid white;
+        margin-left: 0.2em;
+      }
+    }
+  }
+
+  .tlv-tile-title {
+    display: inline-block;
+    height: 1.8em;
+    width: 100%;
+
+    padding: 0.1em;
+  }
+
+  > .tlv-tile { // first level
+    min-width: 40%;
+
+    border-style: solid;
+    border-width: 1px 1px 1px 4px;
+
+    padding: 0.1em;
+    margin: 0.3em 0.5em;
+
+    > .tlv-tile-title {
+      font-weight: bold;
+
+      > .badges {
+        float: right;
+      }
+    }
+
+    > .tlv-tiles > .tlv-tile { // second level
+      min-width: 10%;
+
+      > .tlv-tile-title {
+        height: 100%;
+        text-align: center;
+
+        .badge {
+          margin-top: -0.3em;
+        }
+
+        &:before {
+          content: "";
+          display: inline-block;
+          height: 100%;
+          vertical-align: middle;
+        }
+      }
+    }
+  }
+}
+
+#layout.wide-layout .tlv-view-tiles .tlv-tile-title {
+  font-size: 1.3em;
+}
+
+#layout.wide-layout.twocols .tlv-view-tiles .tlv-tile-title {
+  font-size: 1.1em;
+}
+
+.tlv-view-tree {
+  .tlv-tree-node {
+    display: flex;
+    flex-wrap: wrap;
+    flex-grow: 1;
+
+    width: 100%;
+
+    &.tlv-collapsed {
+      width: auto;
+    }
+
+    background: none;
+    border-style: solid;
+
+    border-width: 2px 0 0 5px;
+
+    padding: 0.2em 0 0 1em;
+
+    &.tlv-collapsed {
+      > .tlv-tree-node, > .tlv-node-icinga {
+        display: none;
+      }
+    }
+
+    .badges {
+      display: inline-block;
+      font-size: 0.9em;
+
+      .badge {
+        border: 0.1em solid white;
+        margin-left: 0.2em;
+      }
+    }
+  }
+
+  > .tlv-tree-node {
+    border-right-width: 2px;
+
+    &:last-of-type {
+      border-bottom-width: 2px;
+    }
+  }
+
+  .tlv-tree-title {
+    display: block;
+    width: 100%;
+    white-space: nowrap;
+    margin: -0.2em 0 0 -1em;
+    padding: 0.3em 0.3em 0.3em 0.3em;
+
+    .badges {
+      float: right;
+    }
+  }
+
+  .tlv-node-icinga {
+    flex-grow: 1;
+
+    margin: 0.2em;
+    padding: 0.2em 1em;
+    white-space: nowrap;
+
+    border-radius: 0.5em;
+
+    font-size: 0.9em;
+  }
+}
+
+.tlv-collapsible {
+  .icon.tlv-collapse-handle::before {
+    font-size: 1.3em;
+    content: '\e81d';
+  }
+
+  .collapsed {
+    .icon.tlv-collapse-handle::before {
+      content: '\e820';
+    }
+  }
+}
+
+/** BEGIN of breadcrumb **/
+.breadcrumb {
+  list-style: none;
+  overflow: hidden;
+  padding: 0;
+
+  .badges {
+    display: inline-block;
+    padding: 0 0 0 0.5em;
+    .badge {
+      line-height: 1.25em;
+      font-size: 0.8em;
+      border: 1px solid white;
+      margin: -0.25em 1px 0 0;
+    }
+  }
+}
+
+.breadcrumb:after {
+  content: '';
+  display: block;
+  clear: both;
+}
+
+.breadcrumb li {
+  float: left;
+  cursor: pointer;
+  user-select: none;
+  -webkit-user-select: none;
+  -moz-user-select: none;
+  -ms-user-select: none;
+
+}
+
+.breadcrumb li a {
+  color: white;
+  margin: 0;
+  font-size: 1.2em;
+  text-decoration: none;
+  padding-left: 2em;
+  line-height: 2.5em;
+  background: @icinga-blue;
+  position: relative;
+  display: block;
+  float: left;
+  &:focus {
+    outline: none;
+  }
+}
+
+.breadcrumb li a:before, .breadcrumb li a:after {
+  content: " ";
+  display: block;
+  width: 0;
+  height: 0;
+  border-top: 1.3em solid transparent;
+  border-bottom: 1.2em solid transparent;
+  position: absolute;
+  margin-top: -1.2em;
+  top: 50%;
+  left: 100%;
+}
+
+.breadcrumb li a:before {
+  border-left: 1.2em solid white;
+  margin-left: 1px;
+  z-index: 1;
+}
+
+.breadcrumb li a:after {
+  border-left: 1.2em solid @icinga-blue;
+  z-index: 2;
+}
+
+.breadcrumb li:first-child a {
+  padding-left: 1em;
+  padding-right: 0.5em;
+}
+
+.breadcrumb li:last-child a {
+  cursor: default;
+}
+
+.breadcrumb li:last-child a:hover {
+
+}
+
+.breadcrumb li:not(:last-child) a:hover {
+  background: @text-color;
+  color: white;
+}
+
+.breadcrumb li:not(:last-child) a:hover:after {
+  border-left-color: @text-color;
+}
+
+.breadcrumb li a:focus {
+  text-decoration: underline;
+}
+
+#layout.twocols, #layout.layout-minimal, div.compact {
+  .breadcrumb {
+    font-size: 0.833em;
+  }
+}
+
+/** END of breadcrumb **/
+
+.action-links {
+  .action-link {
+    margin-right: 1em;
+  }
+}
+
+.warning-note {
+  display: inline-block;
+
+  padding: 1px 5px;
+  background: @tlv-color-warning-bg;
+  color: @tlv-color-warning-fg
+}
+
+textarea.code-editor {
+  min-height: 45em;
+  width: 100%;
+}
+
+.CodeMirror {
+  min-height: 60em;
+  width: 100%;
+
+  margin-bottom: 1em;
+
+  border: 1px solid @gray-light;
+
+  pre {
+    font-family: @font-family-fixed;
+    font-size: 1.2em;
+  }
+}
+
+div[href].action.active {
+  border-left-color: @icinga-blue;
+}
+
+div[href].action:hover {
+  cursor: pointer;
+
+  a[href]:first-of-type {
+    text-decoration: underline;
+  }
+}
diff --git a/public/css/vendor/codemirror/addon/dialog/dialog.css b/public/css/vendor/codemirror/addon/dialog/dialog.css
new file mode 100644
index 0000000..677c078
--- /dev/null
+++ b/public/css/vendor/codemirror/addon/dialog/dialog.css
@@ -0,0 +1,32 @@
+.CodeMirror-dialog {
+  position: absolute;
+  left: 0; right: 0;
+  background: inherit;
+  z-index: 15;
+  padding: .1em .8em;
+  overflow: hidden;
+  color: inherit;
+}
+
+.CodeMirror-dialog-top {
+  border-bottom: 1px solid #eee;
+  top: 0;
+}
+
+.CodeMirror-dialog-bottom {
+  border-top: 1px solid #eee;
+  bottom: 0;
+}
+
+.CodeMirror-dialog input {
+  border: none;
+  outline: none;
+  background: transparent;
+  width: 20em;
+  color: inherit;
+  font-family: monospace;
+}
+
+.CodeMirror-dialog button {
+  font-size: 70%;
+}
diff --git a/public/css/vendor/codemirror/addon/search/matchesonscrollbar.css b/public/css/vendor/codemirror/addon/search/matchesonscrollbar.css
new file mode 100644
index 0000000..77932cc
--- /dev/null
+++ b/public/css/vendor/codemirror/addon/search/matchesonscrollbar.css
@@ -0,0 +1,8 @@
+.CodeMirror-search-match {
+  background: gold;
+  border-top: 1px solid orange;
+  border-bottom: 1px solid orange;
+  -moz-box-sizing: border-box;
+  box-sizing: border-box;
+  opacity: .5;
+}
diff --git a/public/css/vendor/codemirror/codemirror.css b/public/css/vendor/codemirror/codemirror.css
new file mode 100644
index 0000000..9d8ff0c
--- /dev/null
+++ b/public/css/vendor/codemirror/codemirror.css
@@ -0,0 +1,341 @@
+/* BASICS */
+
+.CodeMirror {
+  /* Set height, width, borders, and global font properties here */
+  font-family: monospace;
+  height: 300px;
+  color: black;
+  direction: ltr;
+}
+
+/* PADDING */
+
+.CodeMirror-lines {
+  padding: 4px 0; /* Vertical padding around content */
+}
+.CodeMirror pre {
+  padding: 0 4px; /* Horizontal padding of content */
+}
+
+.CodeMirror-scrollbar-filler, .CodeMirror-gutter-filler {
+  background-color: white; /* The little square between H and V scrollbars */
+}
+
+/* GUTTER */
+
+.CodeMirror-gutters {
+  border-right: 1px solid #ddd;
+  background-color: #f7f7f7;
+  white-space: nowrap;
+}
+.CodeMirror-linenumbers {}
+.CodeMirror-linenumber {
+  padding: 0 3px 0 5px;
+  min-width: 20px;
+  text-align: right;
+  color: #999;
+  white-space: nowrap;
+}
+
+.CodeMirror-guttermarker { color: black; }
+.CodeMirror-guttermarker-subtle { color: #999; }
+
+/* CURSOR */
+
+.CodeMirror-cursor {
+  border-left: 1px solid black;
+  border-right: none;
+  width: 0;
+}
+/* Shown when moving in bi-directional text */
+.CodeMirror div.CodeMirror-secondarycursor {
+  border-left: 1px solid silver;
+}
+.cm-fat-cursor .CodeMirror-cursor {
+  width: auto;
+  border: 0 !important;
+  background: #7e7;
+}
+.cm-fat-cursor div.CodeMirror-cursors {
+  z-index: 1;
+}
+
+.cm-animate-fat-cursor {
+  width: auto;
+  border: 0;
+  -webkit-animation: blink 1.06s steps(1) infinite;
+  -moz-animation: blink 1.06s steps(1) infinite;
+  animation: blink 1.06s steps(1) infinite;
+  background-color: #7e7;
+}
+@-moz-keyframes blink {
+  0% {}
+  50% { background-color: transparent; }
+  100% {}
+}
+@-webkit-keyframes blink {
+  0% {}
+  50% { background-color: transparent; }
+  100% {}
+}
+@keyframes blink {
+  0% {}
+  50% { background-color: transparent; }
+  100% {}
+}
+
+/* Can style cursor different in overwrite (non-insert) mode */
+.CodeMirror-overwrite .CodeMirror-cursor {}
+
+.cm-tab { display: inline-block; text-decoration: inherit; }
+
+.CodeMirror-rulers {
+  position: absolute;
+  left: 0; right: 0; top: -50px; bottom: -20px;
+  overflow: hidden;
+}
+.CodeMirror-ruler {
+  border-left: 1px solid #ccc;
+  top: 0; bottom: 0;
+  position: absolute;
+}
+
+/* DEFAULT THEME */
+
+.cm-s-default .cm-header {color: blue;}
+.cm-s-default .cm-quote {color: #090;}
+.cm-negative {color: #d44;}
+.cm-positive {color: #292;}
+.cm-header, .cm-strong {font-weight: bold;}
+.cm-em {font-style: italic;}
+.cm-link {text-decoration: underline;}
+.cm-strikethrough {text-decoration: line-through;}
+
+.cm-s-default .cm-keyword {color: #708;}
+.cm-s-default .cm-atom {color: #219;}
+.cm-s-default .cm-number {color: #164;}
+.cm-s-default .cm-def {color: #00f;}
+.cm-s-default .cm-variable,
+.cm-s-default .cm-punctuation,
+.cm-s-default .cm-property,
+.cm-s-default .cm-operator {}
+.cm-s-default .cm-variable-2 {color: #05a;}
+.cm-s-default .cm-variable-3, .cm-s-default .cm-type {color: #085;}
+.cm-s-default .cm-comment {color: #a50;}
+.cm-s-default .cm-string {color: #a11;}
+.cm-s-default .cm-string-2 {color: #f50;}
+.cm-s-default .cm-meta {color: #555;}
+.cm-s-default .cm-qualifier {color: #555;}
+.cm-s-default .cm-builtin {color: #30a;}
+.cm-s-default .cm-bracket {color: #997;}
+.cm-s-default .cm-tag {color: #170;}
+.cm-s-default .cm-attribute {color: #00c;}
+.cm-s-default .cm-hr {color: #999;}
+.cm-s-default .cm-link {color: #00c;}
+
+.cm-s-default .cm-error {color: #f00;}
+.cm-invalidchar {color: #f00;}
+
+.CodeMirror-composing { border-bottom: 2px solid; }
+
+/* Default styles for common addons */
+
+div.CodeMirror span.CodeMirror-matchingbracket {color: #0f0;}
+div.CodeMirror span.CodeMirror-nonmatchingbracket {color: #f22;}
+.CodeMirror-matchingtag { background: rgba(255, 150, 0, .3); }
+.CodeMirror-activeline-background {background: #e8f2ff;}
+
+/* STOP */
+
+/* The rest of this file contains styles related to the mechanics of
+   the editor. You probably shouldn't touch them. */
+
+.CodeMirror {
+  position: relative;
+  overflow: hidden;
+  background: white;
+}
+
+.CodeMirror-scroll {
+  overflow: scroll !important; /* Things will break if this is overridden */
+  /* 30px is the magic margin used to hide the element's real scrollbars */
+  /* See overflow: hidden in .CodeMirror */
+  margin-bottom: -30px; margin-right: -30px;
+  padding-bottom: 30px;
+  height: 100%;
+  outline: none; /* Prevent dragging from highlighting the element */
+  position: relative;
+}
+.CodeMirror-sizer {
+  position: relative;
+  border-right: 30px solid transparent;
+}
+
+/* The fake, visible scrollbars. Used to force redraw during scrolling
+   before actual scrolling happens, thus preventing shaking and
+   flickering artifacts. */
+.CodeMirror-vscrollbar, .CodeMirror-hscrollbar, .CodeMirror-scrollbar-filler, .CodeMirror-gutter-filler {
+  position: absolute;
+  z-index: 6;
+  display: none;
+}
+.CodeMirror-vscrollbar {
+  right: 0; top: 0;
+  overflow-x: hidden;
+  overflow-y: scroll;
+}
+.CodeMirror-hscrollbar {
+  bottom: 0; left: 0;
+  overflow-y: hidden;
+  overflow-x: scroll;
+}
+.CodeMirror-scrollbar-filler {
+  right: 0; bottom: 0;
+}
+.CodeMirror-gutter-filler {
+  left: 0; bottom: 0;
+}
+
+.CodeMirror-gutters {
+  position: absolute; left: 0; top: 0;
+  min-height: 100%;
+  z-index: 3;
+}
+.CodeMirror-gutter {
+  white-space: normal;
+  height: 100%;
+  display: inline-block;
+  vertical-align: top;
+  margin-bottom: -30px;
+}
+.CodeMirror-gutter-wrapper {
+  position: absolute;
+  z-index: 4;
+  background: none !important;
+  border: none !important;
+}
+.CodeMirror-gutter-background {
+  position: absolute;
+  top: 0; bottom: 0;
+  z-index: 4;
+}
+.CodeMirror-gutter-elt {
+  position: absolute;
+  cursor: default;
+  z-index: 4;
+}
+.CodeMirror-gutter-wrapper ::selection { background-color: transparent }
+.CodeMirror-gutter-wrapper ::-moz-selection { background-color: transparent }
+
+.CodeMirror-lines {
+  cursor: text;
+  min-height: 1px; /* prevents collapsing before first draw */
+}
+.CodeMirror pre {
+  /* Reset some styles that the rest of the page might have set */
+  -moz-border-radius: 0; -webkit-border-radius: 0; border-radius: 0;
+  border-width: 0;
+  background: transparent;
+  font-family: inherit;
+  font-size: inherit;
+  margin: 0;
+  white-space: pre;
+  word-wrap: normal;
+  line-height: inherit;
+  color: inherit;
+  z-index: 2;
+  position: relative;
+  overflow: visible;
+  -webkit-tap-highlight-color: transparent;
+  -webkit-font-variant-ligatures: contextual;
+  font-variant-ligatures: contextual;
+}
+.CodeMirror-wrap pre {
+  word-wrap: break-word;
+  white-space: pre-wrap;
+  word-break: normal;
+}
+
+.CodeMirror-linebackground {
+  position: absolute;
+  left: 0; right: 0; top: 0; bottom: 0;
+  z-index: 0;
+}
+
+.CodeMirror-linewidget {
+  position: relative;
+  z-index: 2;
+  overflow: auto;
+}
+
+.CodeMirror-widget {}
+
+.CodeMirror-rtl pre { direction: rtl; }
+
+.CodeMirror-code {
+  outline: none;
+}
+
+/* Force content-box sizing for the elements where we expect it */
+.CodeMirror-scroll,
+.CodeMirror-sizer,
+.CodeMirror-gutter,
+.CodeMirror-gutters,
+.CodeMirror-linenumber {
+  -moz-box-sizing: content-box;
+  box-sizing: content-box;
+}
+
+.CodeMirror-measure {
+  position: absolute;
+  width: 100%;
+  height: 0;
+  overflow: hidden;
+  visibility: hidden;
+}
+
+.CodeMirror-cursor {
+  position: absolute;
+  pointer-events: none;
+}
+.CodeMirror-measure pre { position: static; }
+
+div.CodeMirror-cursors {
+  visibility: hidden;
+  position: relative;
+  z-index: 3;
+}
+div.CodeMirror-dragcursors {
+  visibility: visible;
+}
+
+.CodeMirror-focused div.CodeMirror-cursors {
+  visibility: visible;
+}
+
+.CodeMirror-selected { background: #d9d9d9; }
+.CodeMirror-focused .CodeMirror-selected { background: #d7d4f0; }
+.CodeMirror-crosshair { cursor: crosshair; }
+.CodeMirror-line::selection, .CodeMirror-line > span::selection, .CodeMirror-line > span > span::selection { background: #d7d4f0; }
+.CodeMirror-line::-moz-selection, .CodeMirror-line > span::-moz-selection, .CodeMirror-line > span > span::-moz-selection { background: #d7d4f0; }
+
+.cm-searching {
+  background-color: #ffa;
+  background-color: rgba(255, 255, 0, .4);
+}
+
+/* Used to force a border model for a node */
+.cm-force-border { padding-right: .1px; }
+
+@media print {
+  /* Hide the cursor when printing */
+  .CodeMirror div.CodeMirror-cursors {
+    visibility: hidden;
+  }
+}
+
+/* See issue #2901 */
+.cm-tab-wrap-hack:after { content: ''; }
+
+/* Help users use markselection to safely style text background */
+span.CodeMirror-selectedtext { background: none; }
diff --git a/public/js/module.js b/public/js/module.js
new file mode 100644
index 0000000..49816bd
--- /dev/null
+++ b/public/js/module.js
@@ -0,0 +1,91 @@
+;(function (Icinga) {
+
+    var Toplevelview = function (module) {
+        this.module = module;
+        this.initialize();
+    };
+
+    Toplevelview.prototype = {
+        initialize: function () {
+            var addCSSRule = function (sheet, selector, rules, index) {
+                if ('insertRule' in sheet) {
+                    sheet.insertRule(selector + '{' + rules + '}', index);
+                } else if ('addRule' in sheet) {
+                    sheet.addRule(selector, rules, index);
+                } else {
+                    Icinga.module.icinga.logger.debug('Can\'t insert CSS rule');
+                }
+            };
+
+            var sheet = (function () {
+                var style = document.createElement('style');
+                // WebKit hack
+                style.appendChild(document.createTextNode(''));
+                document.head.appendChild(style);
+                return style.sheet;
+            })();
+
+            addCSSRule(
+                sheet,
+                '#layout.twocols.wide-layout #col1.module-toplevelview,'
+                + '#layout.twocols.wide-layout #col1.module-toplevelview ~ #col2',
+                'width: 50%',
+                0
+            );
+
+            this.module.on('click', '.tlv-view-tree .tlv-tree-node', this.processTreeNodeClick);
+            this.module.on('click', 'div[href].action', this.buttonClick, this);
+            this.module.on('rendered', this.rendered);
+        },
+
+        rendered: function (ev) {
+            this.collapseOnLoad(ev);
+            var $container = $(ev.currentTarget);
+            $container.find('.codemirror').each(function (i, el) {
+                var mode = el.getAttribute('data-codemirror-mode');
+                var editor = CodeMirror.fromTextArea(el, {
+                    lineNumbers: true,
+                    mode: mode
+                });
+                // avoid entering tab chars
+                editor.setOption('extraKeys', {
+                    Tab: function(cm) {
+                        var spaces = new Array(cm.getOption('indentUnit') + 1).join(' ');
+                        cm.replaceSelection(spaces);
+                    },
+                    'Ctrl-F': 'findPersistent'
+                });
+            });
+        },
+
+        processTreeNodeClick: function (event) {
+            event.stopPropagation();
+            var $el = $(event.currentTarget);
+            var $parent = $el.parents('.tlv-tree-node');
+            var $all = $el.find('.tlv-tree-node');
+            if (($parent.length === 0 && $all.hasClass('tlv-collapsed')) || $el.hasClass('tlv-collapsed')) {
+                $el.removeClass('tlv-collapsed');
+                $all.removeClass('tlv-collapsed');
+            } else {
+                $el.addClass('tlv-collapsed');
+                $all.addClass('tlv-collapsed');
+            }
+        },
+
+        collapseOnLoad: function (event) {
+            var $el = $(event.currentTarget);
+            $el.find('.tlv-view-tree .tlv-tree-node.tlv-collapsible.ok').addClass('tlv-collapsed');
+        },
+
+        buttonClick: function (event) {
+            event.stopPropagation();
+            var $el = $(event.currentTarget);
+            var $links = $el.find('a[href]');
+            if ($links.length > 0) {
+                $links[0].click();
+            }
+        }
+    };
+
+    Icinga.availableModules.toplevelview = Toplevelview;
+}(Icinga));
diff --git a/public/js/vendor/codemirror/LICENSE b/public/js/vendor/codemirror/LICENSE
new file mode 100644
index 0000000..ff7db4b
--- /dev/null
+++ b/public/js/vendor/codemirror/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (C) 2017 by Marijn Haverbeke <marijnh@gmail.com> and others
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/public/js/vendor/codemirror/SOURCE b/public/js/vendor/codemirror/SOURCE
new file mode 100644
index 0000000..988f797
--- /dev/null
+++ b/public/js/vendor/codemirror/SOURCE
@@ -0,0 +1 @@
+https://github.com/codemirror/codemirror
diff --git a/public/js/vendor/codemirror/VERSION b/public/js/vendor/codemirror/VERSION
new file mode 100644
index 0000000..148cf61
--- /dev/null
+++ b/public/js/vendor/codemirror/VERSION
@@ -0,0 +1 @@
+5.30.0
diff --git a/public/js/vendor/codemirror/addon/dialog/dialog.js b/public/js/vendor/codemirror/addon/dialog/dialog.js
new file mode 100644
index 0000000..f10bb5b
--- /dev/null
+++ b/public/js/vendor/codemirror/addon/dialog/dialog.js
@@ -0,0 +1,157 @@
+// CodeMirror, copyright (c) by Marijn Haverbeke and others
+// Distributed under an MIT license: http://codemirror.net/LICENSE
+
+// Open simple dialogs on top of an editor. Relies on dialog.css.
+
+(function(mod) {
+  if (typeof exports == "object" && typeof module == "object") // CommonJS
+    mod(require("../../lib/codemirror"));
+  else if (typeof define == "function" && define.amd) // AMD
+    define(["../../lib/codemirror"], mod);
+  else // Plain browser env
+    mod(CodeMirror);
+})(function(CodeMirror) {
+  function dialogDiv(cm, template, bottom) {
+    var wrap = cm.getWrapperElement();
+    var dialog;
+    dialog = wrap.appendChild(document.createElement("div"));
+    if (bottom)
+      dialog.className = "CodeMirror-dialog CodeMirror-dialog-bottom";
+    else
+      dialog.className = "CodeMirror-dialog CodeMirror-dialog-top";
+
+    if (typeof template == "string") {
+      dialog.innerHTML = template;
+    } else { // Assuming it's a detached DOM element.
+      dialog.appendChild(template);
+    }
+    return dialog;
+  }
+
+  function closeNotification(cm, newVal) {
+    if (cm.state.currentNotificationClose)
+      cm.state.currentNotificationClose();
+    cm.state.currentNotificationClose = newVal;
+  }
+
+  CodeMirror.defineExtension("openDialog", function(template, callback, options) {
+    if (!options) options = {};
+
+    closeNotification(this, null);
+
+    var dialog = dialogDiv(this, template, options.bottom);
+    var closed = false, me = this;
+    function close(newVal) {
+      if (typeof newVal == 'string') {
+        inp.value = newVal;
+      } else {
+        if (closed) return;
+        closed = true;
+        dialog.parentNode.removeChild(dialog);
+        me.focus();
+
+        if (options.onClose) options.onClose(dialog);
+      }
+    }
+
+    var inp = dialog.getElementsByTagName("input")[0], button;
+    if (inp) {
+      inp.focus();
+
+      if (options.value) {
+        inp.value = options.value;
+        if (options.selectValueOnOpen !== false) {
+          inp.select();
+        }
+      }
+
+      if (options.onInput)
+        CodeMirror.on(inp, "input", function(e) { options.onInput(e, inp.value, close);});
+      if (options.onKeyUp)
+        CodeMirror.on(inp, "keyup", function(e) {options.onKeyUp(e, inp.value, close);});
+
+      CodeMirror.on(inp, "keydown", function(e) {
+        if (options && options.onKeyDown && options.onKeyDown(e, inp.value, close)) { return; }
+        if (e.keyCode == 27 || (options.closeOnEnter !== false && e.keyCode == 13)) {
+          inp.blur();
+          CodeMirror.e_stop(e);
+          close();
+        }
+        if (e.keyCode == 13) callback(inp.value, e);
+      });
+
+      if (options.closeOnBlur !== false) CodeMirror.on(inp, "blur", close);
+    } else if (button = dialog.getElementsByTagName("button")[0]) {
+      CodeMirror.on(button, "click", function() {
+        close();
+        me.focus();
+      });
+
+      if (options.closeOnBlur !== false) CodeMirror.on(button, "blur", close);
+
+      button.focus();
+    }
+    return close;
+  });
+
+  CodeMirror.defineExtension("openConfirm", function(template, callbacks, options) {
+    closeNotification(this, null);
+    var dialog = dialogDiv(this, template, options && options.bottom);
+    var buttons = dialog.getElementsByTagName("button");
+    var closed = false, me = this, blurring = 1;
+    function close() {
+      if (closed) return;
+      closed = true;
+      dialog.parentNode.removeChild(dialog);
+      me.focus();
+    }
+    buttons[0].focus();
+    for (var i = 0; i < buttons.length; ++i) {
+      var b = buttons[i];
+      (function(callback) {
+        CodeMirror.on(b, "click", function(e) {
+          CodeMirror.e_preventDefault(e);
+          close();
+          if (callback) callback(me);
+        });
+      })(callbacks[i]);
+      CodeMirror.on(b, "blur", function() {
+        --blurring;
+        setTimeout(function() { if (blurring <= 0) close(); }, 200);
+      });
+      CodeMirror.on(b, "focus", function() { ++blurring; });
+    }
+  });
+
+  /*
+   * openNotification
+   * Opens a notification, that can be closed with an optional timer
+   * (default 5000ms timer) and always closes on click.
+   *
+   * If a notification is opened while another is opened, it will close the
+   * currently opened one and open the new one immediately.
+   */
+  CodeMirror.defineExtension("openNotification", function(template, options) {
+    closeNotification(this, close);
+    var dialog = dialogDiv(this, template, options && options.bottom);
+    var closed = false, doneTimer;
+    var duration = options && typeof options.duration !== "undefined" ? options.duration : 5000;
+
+    function close() {
+      if (closed) return;
+      closed = true;
+      clearTimeout(doneTimer);
+      dialog.parentNode.removeChild(dialog);
+    }
+
+    CodeMirror.on(dialog, 'click', function(e) {
+      CodeMirror.e_preventDefault(e);
+      close();
+    });
+
+    if (duration)
+      doneTimer = setTimeout(close, duration);
+
+    return close;
+  });
+});
diff --git a/public/js/vendor/codemirror/addon/search/jump-to-line.js b/public/js/vendor/codemirror/addon/search/jump-to-line.js
new file mode 100644
index 0000000..8b599cb
--- /dev/null
+++ b/public/js/vendor/codemirror/addon/search/jump-to-line.js
@@ -0,0 +1,49 @@
+// CodeMirror, copyright (c) by Marijn Haverbeke and others
+// Distributed under an MIT license: http://codemirror.net/LICENSE
+
+// Defines jumpToLine command. Uses dialog.js if present.
+
+(function(mod) {
+  if (typeof exports == "object" && typeof module == "object") // CommonJS
+    mod(require("../../lib/codemirror"), require("../dialog/dialog"));
+  else if (typeof define == "function" && define.amd) // AMD
+    define(["../../lib/codemirror", "../dialog/dialog"], mod);
+  else // Plain browser env
+    mod(CodeMirror);
+})(function(CodeMirror) {
+  "use strict";
+
+  function dialog(cm, text, shortText, deflt, f) {
+    if (cm.openDialog) cm.openDialog(text, f, {value: deflt, selectValueOnOpen: true});
+    else f(prompt(shortText, deflt));
+  }
+
+  var jumpDialog =
+      'Jump to line: <input type="text" style="width: 10em" class="CodeMirror-search-field"/> <span style="color: #888" class="CodeMirror-search-hint">(Use line:column or scroll% syntax)</span>';
+
+  function interpretLine(cm, string) {
+    var num = Number(string)
+    if (/^[-+]/.test(string)) return cm.getCursor().line + num
+    else return num - 1
+  }
+
+  CodeMirror.commands.jumpToLine = function(cm) {
+    var cur = cm.getCursor();
+    dialog(cm, jumpDialog, "Jump to line:", (cur.line + 1) + ":" + cur.ch, function(posStr) {
+      if (!posStr) return;
+
+      var match;
+      if (match = /^\s*([\+\-]?\d+)\s*\:\s*(\d+)\s*$/.exec(posStr)) {
+        cm.setCursor(interpretLine(cm, match[1]), Number(match[2]))
+      } else if (match = /^\s*([\+\-]?\d+(\.\d+)?)\%\s*/.exec(posStr)) {
+        var line = Math.round(cm.lineCount() * Number(match[1]) / 100);
+        if (/^[-+]/.test(match[1])) line = cur.line + line + 1;
+        cm.setCursor(line - 1, cur.ch);
+      } else if (match = /^\s*\:?\s*([\+\-]?\d+)\s*/.exec(posStr)) {
+        cm.setCursor(interpretLine(cm, match[1]), cur.ch);
+      }
+    });
+  };
+
+  CodeMirror.keyMap["default"]["Alt-G"] = "jumpToLine";
+});
diff --git a/public/js/vendor/codemirror/addon/search/match-highlighter.js b/public/js/vendor/codemirror/addon/search/match-highlighter.js
new file mode 100644
index 0000000..73ba0e0
--- /dev/null
+++ b/public/js/vendor/codemirror/addon/search/match-highlighter.js
@@ -0,0 +1,165 @@
+// CodeMirror, copyright (c) by Marijn Haverbeke and others
+// Distributed under an MIT license: http://codemirror.net/LICENSE
+
+// Highlighting text that matches the selection
+//
+// Defines an option highlightSelectionMatches, which, when enabled,
+// will style strings that match the selection throughout the
+// document.
+//
+// The option can be set to true to simply enable it, or to a
+// {minChars, style, wordsOnly, showToken, delay} object to explicitly
+// configure it. minChars is the minimum amount of characters that should be
+// selected for the behavior to occur, and style is the token style to
+// apply to the matches. This will be prefixed by "cm-" to create an
+// actual CSS class name. If wordsOnly is enabled, the matches will be
+// highlighted only if the selected text is a word. showToken, when enabled,
+// will cause the current token to be highlighted when nothing is selected.
+// delay is used to specify how much time to wait, in milliseconds, before
+// highlighting the matches. If annotateScrollbar is enabled, the occurences
+// will be highlighted on the scrollbar via the matchesonscrollbar addon.
+
+(function(mod) {
+  if (typeof exports == "object" && typeof module == "object") // CommonJS
+    mod(require("../../lib/codemirror"), require("./matchesonscrollbar"));
+  else if (typeof define == "function" && define.amd) // AMD
+    define(["../../lib/codemirror", "./matchesonscrollbar"], mod);
+  else // Plain browser env
+    mod(CodeMirror);
+})(function(CodeMirror) {
+  "use strict";
+
+  var defaults = {
+    style: "matchhighlight",
+    minChars: 2,
+    delay: 100,
+    wordsOnly: false,
+    annotateScrollbar: false,
+    showToken: false,
+    trim: true
+  }
+
+  function State(options) {
+    this.options = {}
+    for (var name in defaults)
+      this.options[name] = (options && options.hasOwnProperty(name) ? options : defaults)[name]
+    this.overlay = this.timeout = null;
+    this.matchesonscroll = null;
+    this.active = false;
+  }
+
+  CodeMirror.defineOption("highlightSelectionMatches", false, function(cm, val, old) {
+    if (old && old != CodeMirror.Init) {
+      removeOverlay(cm);
+      clearTimeout(cm.state.matchHighlighter.timeout);
+      cm.state.matchHighlighter = null;
+      cm.off("cursorActivity", cursorActivity);
+      cm.off("focus", onFocus)
+    }
+    if (val) {
+      var state = cm.state.matchHighlighter = new State(val);
+      if (cm.hasFocus()) {
+        state.active = true
+        highlightMatches(cm)
+      } else {
+        cm.on("focus", onFocus)
+      }
+      cm.on("cursorActivity", cursorActivity);
+    }
+  });
+
+  function cursorActivity(cm) {
+    var state = cm.state.matchHighlighter;
+    if (state.active || cm.hasFocus()) scheduleHighlight(cm, state)
+  }
+
+  function onFocus(cm) {
+    var state = cm.state.matchHighlighter
+    if (!state.active) {
+      state.active = true
+      scheduleHighlight(cm, state)
+    }
+  }
+
+  function scheduleHighlight(cm, state) {
+    clearTimeout(state.timeout);
+    state.timeout = setTimeout(function() {highlightMatches(cm);}, state.options.delay);
+  }
+
+  function addOverlay(cm, query, hasBoundary, style) {
+    var state = cm.state.matchHighlighter;
+    cm.addOverlay(state.overlay = makeOverlay(query, hasBoundary, style));
+    if (state.options.annotateScrollbar && cm.showMatchesOnScrollbar) {
+      var searchFor = hasBoundary ? new RegExp("\\b" + query + "\\b") : query;
+      state.matchesonscroll = cm.showMatchesOnScrollbar(searchFor, false,
+        {className: "CodeMirror-selection-highlight-scrollbar"});
+    }
+  }
+
+  function removeOverlay(cm) {
+    var state = cm.state.matchHighlighter;
+    if (state.overlay) {
+      cm.removeOverlay(state.overlay);
+      state.overlay = null;
+      if (state.matchesonscroll) {
+        state.matchesonscroll.clear();
+        state.matchesonscroll = null;
+      }
+    }
+  }
+
+  function highlightMatches(cm) {
+    cm.operation(function() {
+      var state = cm.state.matchHighlighter;
+      removeOverlay(cm);
+      if (!cm.somethingSelected() && state.options.showToken) {
+        var re = state.options.showToken === true ? /[\w$]/ : state.options.showToken;
+        var cur = cm.getCursor(), line = cm.getLine(cur.line), start = cur.ch, end = start;
+        while (start && re.test(line.charAt(start - 1))) --start;
+        while (end < line.length && re.test(line.charAt(end))) ++end;
+        if (start < end)
+          addOverlay(cm, line.slice(start, end), re, state.options.style);
+        return;
+      }
+      var from = cm.getCursor("from"), to = cm.getCursor("to");
+      if (from.line != to.line) return;
+      if (state.options.wordsOnly && !isWord(cm, from, to)) return;
+      var selection = cm.getRange(from, to)
+      if (state.options.trim) selection = selection.replace(/^\s+|\s+$/g, "")
+      if (selection.length >= state.options.minChars)
+        addOverlay(cm, selection, false, state.options.style);
+    });
+  }
+
+  function isWord(cm, from, to) {
+    var str = cm.getRange(from, to);
+    if (str.match(/^\w+$/) !== null) {
+        if (from.ch > 0) {
+            var pos = {line: from.line, ch: from.ch - 1};
+            var chr = cm.getRange(pos, from);
+            if (chr.match(/\W/) === null) return false;
+        }
+        if (to.ch < cm.getLine(from.line).length) {
+            var pos = {line: to.line, ch: to.ch + 1};
+            var chr = cm.getRange(to, pos);
+            if (chr.match(/\W/) === null) return false;
+        }
+        return true;
+    } else return false;
+  }
+
+  function boundariesAround(stream, re) {
+    return (!stream.start || !re.test(stream.string.charAt(stream.start - 1))) &&
+      (stream.pos == stream.string.length || !re.test(stream.string.charAt(stream.pos)));
+  }
+
+  function makeOverlay(query, hasBoundary, style) {
+    return {token: function(stream) {
+      if (stream.match(query) &&
+          (!hasBoundary || boundariesAround(stream, hasBoundary)))
+        return style;
+      stream.next();
+      stream.skipTo(query.charAt(0)) || stream.skipToEnd();
+    }};
+  }
+});
diff --git a/public/js/vendor/codemirror/addon/search/matchesonscrollbar.js b/public/js/vendor/codemirror/addon/search/matchesonscrollbar.js
new file mode 100644
index 0000000..8d19228
--- /dev/null
+++ b/public/js/vendor/codemirror/addon/search/matchesonscrollbar.js
@@ -0,0 +1,97 @@
+// CodeMirror, copyright (c) by Marijn Haverbeke and others
+// Distributed under an MIT license: http://codemirror.net/LICENSE
+
+(function(mod) {
+  if (typeof exports == "object" && typeof module == "object") // CommonJS
+    mod(require("../../lib/codemirror"), require("./searchcursor"), require("../scroll/annotatescrollbar"));
+  else if (typeof define == "function" && define.amd) // AMD
+    define(["../../lib/codemirror", "./searchcursor", "../scroll/annotatescrollbar"], mod);
+  else // Plain browser env
+    mod(CodeMirror);
+})(function(CodeMirror) {
+  "use strict";
+
+  CodeMirror.defineExtension("showMatchesOnScrollbar", function(query, caseFold, options) {
+    if (typeof options == "string") options = {className: options};
+    if (!options) options = {};
+    return new SearchAnnotation(this, query, caseFold, options);
+  });
+
+  function SearchAnnotation(cm, query, caseFold, options) {
+    this.cm = cm;
+    this.options = options;
+    var annotateOptions = {listenForChanges: false};
+    for (var prop in options) annotateOptions[prop] = options[prop];
+    if (!annotateOptions.className) annotateOptions.className = "CodeMirror-search-match";
+    this.annotation = cm.annotateScrollbar(annotateOptions);
+    this.query = query;
+    this.caseFold = caseFold;
+    this.gap = {from: cm.firstLine(), to: cm.lastLine() + 1};
+    this.matches = [];
+    this.update = null;
+
+    this.findMatches();
+    this.annotation.update(this.matches);
+
+    var self = this;
+    cm.on("change", this.changeHandler = function(_cm, change) { self.onChange(change); });
+  }
+
+  var MAX_MATCHES = 1000;
+
+  SearchAnnotation.prototype.findMatches = function() {
+    if (!this.gap) return;
+    for (var i = 0; i < this.matches.length; i++) {
+      var match = this.matches[i];
+      if (match.from.line >= this.gap.to) break;
+      if (match.to.line >= this.gap.from) this.matches.splice(i--, 1);
+    }
+    var cursor = this.cm.getSearchCursor(this.query, CodeMirror.Pos(this.gap.from, 0), this.caseFold);
+    var maxMatches = this.options && this.options.maxMatches || MAX_MATCHES;
+    while (cursor.findNext()) {
+      var match = {from: cursor.from(), to: cursor.to()};
+      if (match.from.line >= this.gap.to) break;
+      this.matches.splice(i++, 0, match);
+      if (this.matches.length > maxMatches) break;
+    }
+    this.gap = null;
+  };
+
+  function offsetLine(line, changeStart, sizeChange) {
+    if (line <= changeStart) return line;
+    return Math.max(changeStart, line + sizeChange);
+  }
+
+  SearchAnnotation.prototype.onChange = function(change) {
+    var startLine = change.from.line;
+    var endLine = CodeMirror.changeEnd(change).line;
+    var sizeChange = endLine - change.to.line;
+    if (this.gap) {
+      this.gap.from = Math.min(offsetLine(this.gap.from, startLine, sizeChange), change.from.line);
+      this.gap.to = Math.max(offsetLine(this.gap.to, startLine, sizeChange), change.from.line);
+    } else {
+      this.gap = {from: change.from.line, to: endLine + 1};
+    }
+
+    if (sizeChange) for (var i = 0; i < this.matches.length; i++) {
+      var match = this.matches[i];
+      var newFrom = offsetLine(match.from.line, startLine, sizeChange);
+      if (newFrom != match.from.line) match.from = CodeMirror.Pos(newFrom, match.from.ch);
+      var newTo = offsetLine(match.to.line, startLine, sizeChange);
+      if (newTo != match.to.line) match.to = CodeMirror.Pos(newTo, match.to.ch);
+    }
+    clearTimeout(this.update);
+    var self = this;
+    this.update = setTimeout(function() { self.updateAfterChange(); }, 250);
+  };
+
+  SearchAnnotation.prototype.updateAfterChange = function() {
+    this.findMatches();
+    this.annotation.update(this.matches);
+  };
+
+  SearchAnnotation.prototype.clear = function() {
+    this.cm.off("change", this.changeHandler);
+    this.annotation.clear();
+  };
+});
diff --git a/public/js/vendor/codemirror/addon/search/search.js b/public/js/vendor/codemirror/addon/search/search.js
new file mode 100644
index 0000000..4059ccd
--- /dev/null
+++ b/public/js/vendor/codemirror/addon/search/search.js
@@ -0,0 +1,252 @@
+// CodeMirror, copyright (c) by Marijn Haverbeke and others
+// Distributed under an MIT license: http://codemirror.net/LICENSE
+
+// Define search commands. Depends on dialog.js or another
+// implementation of the openDialog method.
+
+// Replace works a little oddly -- it will do the replace on the next
+// Ctrl-G (or whatever is bound to findNext) press. You prevent a
+// replace by making sure the match is no longer selected when hitting
+// Ctrl-G.
+
+(function(mod) {
+  if (typeof exports == "object" && typeof module == "object") // CommonJS
+    mod(require("../../lib/codemirror"), require("./searchcursor"), require("../dialog/dialog"));
+  else if (typeof define == "function" && define.amd) // AMD
+    define(["../../lib/codemirror", "./searchcursor", "../dialog/dialog"], mod);
+  else // Plain browser env
+    mod(CodeMirror);
+})(function(CodeMirror) {
+  "use strict";
+
+  function searchOverlay(query, caseInsensitive) {
+    if (typeof query == "string")
+      query = new RegExp(query.replace(/[\-\[\]\/\{\}\(\)\*\+\?\.\\\^\$\|]/g, "\\$&"), caseInsensitive ? "gi" : "g");
+    else if (!query.global)
+      query = new RegExp(query.source, query.ignoreCase ? "gi" : "g");
+
+    return {token: function(stream) {
+      query.lastIndex = stream.pos;
+      var match = query.exec(stream.string);
+      if (match && match.index == stream.pos) {
+        stream.pos += match[0].length || 1;
+        return "searching";
+      } else if (match) {
+        stream.pos = match.index;
+      } else {
+        stream.skipToEnd();
+      }
+    }};
+  }
+
+  function SearchState() {
+    this.posFrom = this.posTo = this.lastQuery = this.query = null;
+    this.overlay = null;
+  }
+
+  function getSearchState(cm) {
+    return cm.state.search || (cm.state.search = new SearchState());
+  }
+
+  function queryCaseInsensitive(query) {
+    return typeof query == "string" && query == query.toLowerCase();
+  }
+
+  function getSearchCursor(cm, query, pos) {
+    // Heuristic: if the query string is all lowercase, do a case insensitive search.
+    return cm.getSearchCursor(query, pos, {caseFold: queryCaseInsensitive(query), multiline: true});
+  }
+
+  function persistentDialog(cm, text, deflt, onEnter, onKeyDown) {
+    cm.openDialog(text, onEnter, {
+      value: deflt,
+      selectValueOnOpen: true,
+      closeOnEnter: false,
+      onClose: function() { clearSearch(cm); },
+      onKeyDown: onKeyDown
+    });
+  }
+
+  function dialog(cm, text, shortText, deflt, f) {
+    if (cm.openDialog) cm.openDialog(text, f, {value: deflt, selectValueOnOpen: true});
+    else f(prompt(shortText, deflt));
+  }
+
+  function confirmDialog(cm, text, shortText, fs) {
+    if (cm.openConfirm) cm.openConfirm(text, fs);
+    else if (confirm(shortText)) fs[0]();
+  }
+
+  function parseString(string) {
+    return string.replace(/\\(.)/g, function(_, ch) {
+      if (ch == "n") return "\n"
+      if (ch == "r") return "\r"
+      return ch
+    })
+  }
+
+  function parseQuery(query) {
+    var isRE = query.match(/^\/(.*)\/([a-z]*)$/);
+    if (isRE) {
+      try { query = new RegExp(isRE[1], isRE[2].indexOf("i") == -1 ? "" : "i"); }
+      catch(e) {} // Not a regular expression after all, do a string search
+    } else {
+      query = parseString(query)
+    }
+    if (typeof query == "string" ? query == "" : query.test(""))
+      query = /x^/;
+    return query;
+  }
+
+  var queryDialog =
+    '<span class="CodeMirror-search-label">Search:</span> <input type="text" style="width: 10em" class="CodeMirror-search-field"/> <span style="color: #888" class="CodeMirror-search-hint">(Use /re/ syntax for regexp search)</span>';
+
+  function startSearch(cm, state, query) {
+    state.queryText = query;
+    state.query = parseQuery(query);
+    cm.removeOverlay(state.overlay, queryCaseInsensitive(state.query));
+    state.overlay = searchOverlay(state.query, queryCaseInsensitive(state.query));
+    cm.addOverlay(state.overlay);
+    if (cm.showMatchesOnScrollbar) {
+      if (state.annotate) { state.annotate.clear(); state.annotate = null; }
+      state.annotate = cm.showMatchesOnScrollbar(state.query, queryCaseInsensitive(state.query));
+    }
+  }
+
+  function doSearch(cm, rev, persistent, immediate) {
+    var state = getSearchState(cm);
+    if (state.query) return findNext(cm, rev);
+    var q = cm.getSelection() || state.lastQuery;
+    if (q instanceof RegExp && q.source == "x^") q = null
+    if (persistent && cm.openDialog) {
+      var hiding = null
+      var searchNext = function(query, event) {
+        CodeMirror.e_stop(event);
+        if (!query) return;
+        if (query != state.queryText) {
+          startSearch(cm, state, query);
+          state.posFrom = state.posTo = cm.getCursor();
+        }
+        if (hiding) hiding.style.opacity = 1
+        findNext(cm, event.shiftKey, function(_, to) {
+          var dialog
+          if (to.line < 3 && document.querySelector &&
+              (dialog = cm.display.wrapper.querySelector(".CodeMirror-dialog")) &&
+              dialog.getBoundingClientRect().bottom - 4 > cm.cursorCoords(to, "window").top)
+            (hiding = dialog).style.opacity = .4
+        })
+      };
+      persistentDialog(cm, queryDialog, q, searchNext, function(event, query) {
+        var keyName = CodeMirror.keyName(event)
+        var extra = cm.getOption('extraKeys'), cmd = (extra && extra[keyName]) || CodeMirror.keyMap[cm.getOption("keyMap")][keyName]
+        if (cmd == "findNext" || cmd == "findPrev" ||
+          cmd == "findPersistentNext" || cmd == "findPersistentPrev") {
+          CodeMirror.e_stop(event);
+          startSearch(cm, getSearchState(cm), query);
+          cm.execCommand(cmd);
+        } else if (cmd == "find" || cmd == "findPersistent") {
+          CodeMirror.e_stop(event);
+          searchNext(query, event);
+        }
+      });
+      if (immediate && q) {
+        startSearch(cm, state, q);
+        findNext(cm, rev);
+      }
+    } else {
+      dialog(cm, queryDialog, "Search for:", q, function(query) {
+        if (query && !state.query) cm.operation(function() {
+          startSearch(cm, state, query);
+          state.posFrom = state.posTo = cm.getCursor();
+          findNext(cm, rev);
+        });
+      });
+    }
+  }
+
+  function findNext(cm, rev, callback) {cm.operation(function() {
+    var state = getSearchState(cm);
+    var cursor = getSearchCursor(cm, state.query, rev ? state.posFrom : state.posTo);
+    if (!cursor.find(rev)) {
+      cursor = getSearchCursor(cm, state.query, rev ? CodeMirror.Pos(cm.lastLine()) : CodeMirror.Pos(cm.firstLine(), 0));
+      if (!cursor.find(rev)) return;
+    }
+    cm.setSelection(cursor.from(), cursor.to());
+    cm.scrollIntoView({from: cursor.from(), to: cursor.to()}, 20);
+    state.posFrom = cursor.from(); state.posTo = cursor.to();
+    if (callback) callback(cursor.from(), cursor.to())
+  });}
+
+  function clearSearch(cm) {cm.operation(function() {
+    var state = getSearchState(cm);
+    state.lastQuery = state.query;
+    if (!state.query) return;
+    state.query = state.queryText = null;
+    cm.removeOverlay(state.overlay);
+    if (state.annotate) { state.annotate.clear(); state.annotate = null; }
+  });}
+
+  var replaceQueryDialog =
+    ' <input type="text" style="width: 10em" class="CodeMirror-search-field"/> <span style="color: #888" class="CodeMirror-search-hint">(Use /re/ syntax for regexp search)</span>';
+  var replacementQueryDialog = '<span class="CodeMirror-search-label">With:</span> <input type="text" style="width: 10em" class="CodeMirror-search-field"/>';
+  var doReplaceConfirm = '<span class="CodeMirror-search-label">Replace?</span> <button>Yes</button> <button>No</button> <button>All</button> <button>Stop</button>';
+
+  function replaceAll(cm, query, text) {
+    cm.operation(function() {
+      for (var cursor = getSearchCursor(cm, query); cursor.findNext();) {
+        if (typeof query != "string") {
+          var match = cm.getRange(cursor.from(), cursor.to()).match(query);
+          cursor.replace(text.replace(/\$(\d)/g, function(_, i) {return match[i];}));
+        } else cursor.replace(text);
+      }
+    });
+  }
+
+  function replace(cm, all) {
+    if (cm.getOption("readOnly")) return;
+    var query = cm.getSelection() || getSearchState(cm).lastQuery;
+    var dialogText = '<span class="CodeMirror-search-label">' + (all ? 'Replace all:' : 'Replace:') + '</span>';
+    dialog(cm, dialogText + replaceQueryDialog, dialogText, query, function(query) {
+      if (!query) return;
+      query = parseQuery(query);
+      dialog(cm, replacementQueryDialog, "Replace with:", "", function(text) {
+        text = parseString(text)
+        if (all) {
+          replaceAll(cm, query, text)
+        } else {
+          clearSearch(cm);
+          var cursor = getSearchCursor(cm, query, cm.getCursor("from"));
+          var advance = function() {
+            var start = cursor.from(), match;
+            if (!(match = cursor.findNext())) {
+              cursor = getSearchCursor(cm, query);
+              if (!(match = cursor.findNext()) ||
+                  (start && cursor.from().line == start.line && cursor.from().ch == start.ch)) return;
+            }
+            cm.setSelection(cursor.from(), cursor.to());
+            cm.scrollIntoView({from: cursor.from(), to: cursor.to()});
+            confirmDialog(cm, doReplaceConfirm, "Replace?",
+                          [function() {doReplace(match);}, advance,
+                           function() {replaceAll(cm, query, text)}]);
+          };
+          var doReplace = function(match) {
+            cursor.replace(typeof query == "string" ? text :
+                           text.replace(/\$(\d)/g, function(_, i) {return match[i];}));
+            advance();
+          };
+          advance();
+        }
+      });
+    });
+  }
+
+  CodeMirror.commands.find = function(cm) {clearSearch(cm); doSearch(cm);};
+  CodeMirror.commands.findPersistent = function(cm) {clearSearch(cm); doSearch(cm, false, true);};
+  CodeMirror.commands.findPersistentNext = function(cm) {doSearch(cm, false, true, true);};
+  CodeMirror.commands.findPersistentPrev = function(cm) {doSearch(cm, true, true, true);};
+  CodeMirror.commands.findNext = doSearch;
+  CodeMirror.commands.findPrev = function(cm) {doSearch(cm, true);};
+  CodeMirror.commands.clearSearch = clearSearch;
+  CodeMirror.commands.replace = replace;
+  CodeMirror.commands.replaceAll = function(cm) {replace(cm, true);};
+});
diff --git a/public/js/vendor/codemirror/addon/search/searchcursor.js b/public/js/vendor/codemirror/addon/search/searchcursor.js
new file mode 100644
index 0000000..eccd81a
--- /dev/null
+++ b/public/js/vendor/codemirror/addon/search/searchcursor.js
@@ -0,0 +1,289 @@
+// CodeMirror, copyright (c) by Marijn Haverbeke and others
+// Distributed under an MIT license: http://codemirror.net/LICENSE
+
+(function(mod) {
+  if (typeof exports == "object" && typeof module == "object") // CommonJS
+    mod(require("../../lib/codemirror"))
+  else if (typeof define == "function" && define.amd) // AMD
+    define(["../../lib/codemirror"], mod)
+  else // Plain browser env
+    mod(CodeMirror)
+})(function(CodeMirror) {
+  "use strict"
+  var Pos = CodeMirror.Pos
+
+  function regexpFlags(regexp) {
+    var flags = regexp.flags
+    return flags != null ? flags : (regexp.ignoreCase ? "i" : "")
+      + (regexp.global ? "g" : "")
+      + (regexp.multiline ? "m" : "")
+  }
+
+  function ensureGlobal(regexp) {
+    return regexp.global ? regexp : new RegExp(regexp.source, regexpFlags(regexp) + "g")
+  }
+
+  function maybeMultiline(regexp) {
+    return /\\s|\\n|\n|\\W|\\D|\[\^/.test(regexp.source)
+  }
+
+  function searchRegexpForward(doc, regexp, start) {
+    regexp = ensureGlobal(regexp)
+    for (var line = start.line, ch = start.ch, last = doc.lastLine(); line <= last; line++, ch = 0) {
+      regexp.lastIndex = ch
+      var string = doc.getLine(line), match = regexp.exec(string)
+      if (match)
+        return {from: Pos(line, match.index),
+                to: Pos(line, match.index + match[0].length),
+                match: match}
+    }
+  }
+
+  function searchRegexpForwardMultiline(doc, regexp, start) {
+    if (!maybeMultiline(regexp)) return searchRegexpForward(doc, regexp, start)
+
+    regexp = ensureGlobal(regexp)
+    var string, chunk = 1
+    for (var line = start.line, last = doc.lastLine(); line <= last;) {
+      // This grows the search buffer in exponentially-sized chunks
+      // between matches, so that nearby matches are fast and don't
+      // require concatenating the whole document (in case we're
+      // searching for something that has tons of matches), but at the
+      // same time, the amount of retries is limited.
+      for (var i = 0; i < chunk; i++) {
+        var curLine = doc.getLine(line++)
+        string = string == null ? curLine : string + "\n" + curLine
+      }
+      chunk = chunk * 2
+      regexp.lastIndex = start.ch
+      var match = regexp.exec(string)
+      if (match) {
+        var before = string.slice(0, match.index).split("\n"), inside = match[0].split("\n")
+        var startLine = start.line + before.length - 1, startCh = before[before.length - 1].length
+        return {from: Pos(startLine, startCh),
+                to: Pos(startLine + inside.length - 1,
+                        inside.length == 1 ? startCh + inside[0].length : inside[inside.length - 1].length),
+                match: match}
+      }
+    }
+  }
+
+  function lastMatchIn(string, regexp) {
+    var cutOff = 0, match
+    for (;;) {
+      regexp.lastIndex = cutOff
+      var newMatch = regexp.exec(string)
+      if (!newMatch) return match
+      match = newMatch
+      cutOff = match.index + (match[0].length || 1)
+      if (cutOff == string.length) return match
+    }
+  }
+
+  function searchRegexpBackward(doc, regexp, start) {
+    regexp = ensureGlobal(regexp)
+    for (var line = start.line, ch = start.ch, first = doc.firstLine(); line >= first; line--, ch = -1) {
+      var string = doc.getLine(line)
+      if (ch > -1) string = string.slice(0, ch)
+      var match = lastMatchIn(string, regexp)
+      if (match)
+        return {from: Pos(line, match.index),
+                to: Pos(line, match.index + match[0].length),
+                match: match}
+    }
+  }
+
+  function searchRegexpBackwardMultiline(doc, regexp, start) {
+    regexp = ensureGlobal(regexp)
+    var string, chunk = 1
+    for (var line = start.line, first = doc.firstLine(); line >= first;) {
+      for (var i = 0; i < chunk; i++) {
+        var curLine = doc.getLine(line--)
+        string = string == null ? curLine.slice(0, start.ch) : curLine + "\n" + string
+      }
+      chunk *= 2
+
+      var match = lastMatchIn(string, regexp)
+      if (match) {
+        var before = string.slice(0, match.index).split("\n"), inside = match[0].split("\n")
+        var startLine = line + before.length, startCh = before[before.length - 1].length
+        return {from: Pos(startLine, startCh),
+                to: Pos(startLine + inside.length - 1,
+                        inside.length == 1 ? startCh + inside[0].length : inside[inside.length - 1].length),
+                match: match}
+      }
+    }
+  }
+
+  var doFold, noFold
+  if (String.prototype.normalize) {
+    doFold = function(str) { return str.normalize("NFD").toLowerCase() }
+    noFold = function(str) { return str.normalize("NFD") }
+  } else {
+    doFold = function(str) { return str.toLowerCase() }
+    noFold = function(str) { return str }
+  }
+
+  // Maps a position in a case-folded line back to a position in the original line
+  // (compensating for codepoints increasing in number during folding)
+  function adjustPos(orig, folded, pos, foldFunc) {
+    if (orig.length == folded.length) return pos
+    for (var min = 0, max = pos + Math.max(0, orig.length - folded.length);;) {
+      if (min == max) return min
+      var mid = (min + max) >> 1
+      var len = foldFunc(orig.slice(0, mid)).length
+      if (len == pos) return mid
+      else if (len > pos) max = mid
+      else min = mid + 1
+    }
+  }
+
+  function searchStringForward(doc, query, start, caseFold) {
+    // Empty string would match anything and never progress, so we
+    // define it to match nothing instead.
+    if (!query.length) return null
+    var fold = caseFold ? doFold : noFold
+    var lines = fold(query).split(/\r|\n\r?/)
+
+    search: for (var line = start.line, ch = start.ch, last = doc.lastLine() + 1 - lines.length; line <= last; line++, ch = 0) {
+      var orig = doc.getLine(line).slice(ch), string = fold(orig)
+      if (lines.length == 1) {
+        var found = string.indexOf(lines[0])
+        if (found == -1) continue search
+        var start = adjustPos(orig, string, found, fold) + ch
+        return {from: Pos(line, adjustPos(orig, string, found, fold) + ch),
+                to: Pos(line, adjustPos(orig, string, found + lines[0].length, fold) + ch)}
+      } else {
+        var cutFrom = string.length - lines[0].length
+        if (string.slice(cutFrom) != lines[0]) continue search
+        for (var i = 1; i < lines.length - 1; i++)
+          if (fold(doc.getLine(line + i)) != lines[i]) continue search
+        var end = doc.getLine(line + lines.length - 1), endString = fold(end), lastLine = lines[lines.length - 1]
+        if (end.slice(0, lastLine.length) != lastLine) continue search
+        return {from: Pos(line, adjustPos(orig, string, cutFrom, fold) + ch),
+                to: Pos(line + lines.length - 1, adjustPos(end, endString, lastLine.length, fold))}
+      }
+    }
+  }
+
+  function searchStringBackward(doc, query, start, caseFold) {
+    if (!query.length) return null
+    var fold = caseFold ? doFold : noFold
+    var lines = fold(query).split(/\r|\n\r?/)
+
+    search: for (var line = start.line, ch = start.ch, first = doc.firstLine() - 1 + lines.length; line >= first; line--, ch = -1) {
+      var orig = doc.getLine(line)
+      if (ch > -1) orig = orig.slice(0, ch)
+      var string = fold(orig)
+      if (lines.length == 1) {
+        var found = string.lastIndexOf(lines[0])
+        if (found == -1) continue search
+        return {from: Pos(line, adjustPos(orig, string, found, fold)),
+                to: Pos(line, adjustPos(orig, string, found + lines[0].length, fold))}
+      } else {
+        var lastLine = lines[lines.length - 1]
+        if (string.slice(0, lastLine.length) != lastLine) continue search
+        for (var i = 1, start = line - lines.length + 1; i < lines.length - 1; i++)
+          if (fold(doc.getLine(start + i)) != lines[i]) continue search
+        var top = doc.getLine(line + 1 - lines.length), topString = fold(top)
+        if (topString.slice(topString.length - lines[0].length) != lines[0]) continue search
+        return {from: Pos(line + 1 - lines.length, adjustPos(top, topString, top.length - lines[0].length, fold)),
+                to: Pos(line, adjustPos(orig, string, lastLine.length, fold))}
+      }
+    }
+  }
+
+  function SearchCursor(doc, query, pos, options) {
+    this.atOccurrence = false
+    this.doc = doc
+    pos = pos ? doc.clipPos(pos) : Pos(0, 0)
+    this.pos = {from: pos, to: pos}
+
+    var caseFold
+    if (typeof options == "object") {
+      caseFold = options.caseFold
+    } else { // Backwards compat for when caseFold was the 4th argument
+      caseFold = options
+      options = null
+    }
+
+    if (typeof query == "string") {
+      if (caseFold == null) caseFold = false
+      this.matches = function(reverse, pos) {
+        return (reverse ? searchStringBackward : searchStringForward)(doc, query, pos, caseFold)
+      }
+    } else {
+      query = ensureGlobal(query)
+      if (!options || options.multiline !== false)
+        this.matches = function(reverse, pos) {
+          return (reverse ? searchRegexpBackwardMultiline : searchRegexpForwardMultiline)(doc, query, pos)
+        }
+      else
+        this.matches = function(reverse, pos) {
+          return (reverse ? searchRegexpBackward : searchRegexpForward)(doc, query, pos)
+        }
+    }
+  }
+
+  SearchCursor.prototype = {
+    findNext: function() {return this.find(false)},
+    findPrevious: function() {return this.find(true)},
+
+    find: function(reverse) {
+      var result = this.matches(reverse, this.doc.clipPos(reverse ? this.pos.from : this.pos.to))
+
+      // Implements weird auto-growing behavior on null-matches for
+      // backwards-compatiblity with the vim code (unfortunately)
+      while (result && CodeMirror.cmpPos(result.from, result.to) == 0) {
+        if (reverse) {
+          if (result.from.ch) result.from = Pos(result.from.line, result.from.ch - 1)
+          else if (result.from.line == this.doc.firstLine()) result = null
+          else result = this.matches(reverse, this.doc.clipPos(Pos(result.from.line - 1)))
+        } else {
+          if (result.to.ch < this.doc.getLine(result.to.line).length) result.to = Pos(result.to.line, result.to.ch + 1)
+          else if (result.to.line == this.doc.lastLine()) result = null
+          else result = this.matches(reverse, Pos(result.to.line + 1, 0))
+        }
+      }
+
+      if (result) {
+        this.pos = result
+        this.atOccurrence = true
+        return this.pos.match || true
+      } else {
+        var end = Pos(reverse ? this.doc.firstLine() : this.doc.lastLine() + 1, 0)
+        this.pos = {from: end, to: end}
+        return this.atOccurrence = false
+      }
+    },
+
+    from: function() {if (this.atOccurrence) return this.pos.from},
+    to: function() {if (this.atOccurrence) return this.pos.to},
+
+    replace: function(newText, origin) {
+      if (!this.atOccurrence) return
+      var lines = CodeMirror.splitLines(newText)
+      this.doc.replaceRange(lines, this.pos.from, this.pos.to, origin)
+      this.pos.to = Pos(this.pos.from.line + lines.length - 1,
+                        lines[lines.length - 1].length + (lines.length == 1 ? this.pos.from.ch : 0))
+    }
+  }
+
+  CodeMirror.defineExtension("getSearchCursor", function(query, pos, caseFold) {
+    return new SearchCursor(this.doc, query, pos, caseFold)
+  })
+  CodeMirror.defineDocExtension("getSearchCursor", function(query, pos, caseFold) {
+    return new SearchCursor(this, query, pos, caseFold)
+  })
+
+  CodeMirror.defineExtension("selectMatches", function(query, caseFold) {
+    var ranges = []
+    var cur = this.getSearchCursor(query, this.getCursor("from"), caseFold)
+    while (cur.findNext()) {
+      if (CodeMirror.cmpPos(cur.to(), this.getCursor("to")) > 0) break
+      ranges.push({anchor: cur.from(), head: cur.to()})
+    }
+    if (ranges.length)
+      this.setSelections(ranges, 0)
+  })
+});
diff --git a/public/js/vendor/codemirror/codemirror.js b/public/js/vendor/codemirror/codemirror.js
new file mode 100644
index 0000000..2f90d18
--- /dev/null
+++ b/public/js/vendor/codemirror/codemirror.js
@@ -0,0 +1,9622 @@
+// CodeMirror, copyright (c) by Marijn Haverbeke and others
+// Distributed under an MIT license: http://codemirror.net/LICENSE
+
+// This is CodeMirror (http://codemirror.net), a code editor
+// implemented in JavaScript on top of the browser's DOM.
+//
+// You can find some technical background for some of the code below
+// at http://marijnhaverbeke.nl/blog/#cm-internals .
+
+(function (global, factory) {
+  typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
+  typeof define === 'function' && define.amd ? define(factory) :
+  (global.CodeMirror = factory());
+}(this, (function () { 'use strict';
+
+// Kludges for bugs and behavior differences that can't be feature
+// detected are enabled based on userAgent etc sniffing.
+var userAgent = navigator.userAgent
+var platform = navigator.platform
+
+var gecko = /gecko\/\d/i.test(userAgent)
+var ie_upto10 = /MSIE \d/.test(userAgent)
+var ie_11up = /Trident\/(?:[7-9]|\d{2,})\..*rv:(\d+)/.exec(userAgent)
+var edge = /Edge\/(\d+)/.exec(userAgent)
+var ie = ie_upto10 || ie_11up || edge
+var ie_version = ie && (ie_upto10 ? document.documentMode || 6 : +(edge || ie_11up)[1])
+var webkit = !edge && /WebKit\//.test(userAgent)
+var qtwebkit = webkit && /Qt\/\d+\.\d+/.test(userAgent)
+var chrome = !edge && /Chrome\//.test(userAgent)
+var presto = /Opera\//.test(userAgent)
+var safari = /Apple Computer/.test(navigator.vendor)
+var mac_geMountainLion = /Mac OS X 1\d\D([8-9]|\d\d)\D/.test(userAgent)
+var phantom = /PhantomJS/.test(userAgent)
+
+var ios = !edge && /AppleWebKit/.test(userAgent) && /Mobile\/\w+/.test(userAgent)
+var android = /Android/.test(userAgent)
+// This is woefully incomplete. Suggestions for alternative methods welcome.
+var mobile = ios || android || /webOS|BlackBerry|Opera Mini|Opera Mobi|IEMobile/i.test(userAgent)
+var mac = ios || /Mac/.test(platform)
+var chromeOS = /\bCrOS\b/.test(userAgent)
+var windows = /win/i.test(platform)
+
+var presto_version = presto && userAgent.match(/Version\/(\d*\.\d*)/)
+if (presto_version) { presto_version = Number(presto_version[1]) }
+if (presto_version && presto_version >= 15) { presto = false; webkit = true }
+// Some browsers use the wrong event properties to signal cmd/ctrl on OS X
+var flipCtrlCmd = mac && (qtwebkit || presto && (presto_version == null || presto_version < 12.11))
+var captureRightClick = gecko || (ie && ie_version >= 9)
+
+function classTest(cls) { return new RegExp("(^|\\s)" + cls + "(?:$|\\s)\\s*") }
+
+var rmClass = function(node, cls) {
+  var current = node.className
+  var match = classTest(cls).exec(current)
+  if (match) {
+    var after = current.slice(match.index + match[0].length)
+    node.className = current.slice(0, match.index) + (after ? match[1] + after : "")
+  }
+}
+
+function removeChildren(e) {
+  for (var count = e.childNodes.length; count > 0; --count)
+    { e.removeChild(e.firstChild) }
+  return e
+}
+
+function removeChildrenAndAdd(parent, e) {
+  return removeChildren(parent).appendChild(e)
+}
+
+function elt(tag, content, className, style) {
+  var e = document.createElement(tag)
+  if (className) { e.className = className }
+  if (style) { e.style.cssText = style }
+  if (typeof content == "string") { e.appendChild(document.createTextNode(content)) }
+  else if (content) { for (var i = 0; i < content.length; ++i) { e.appendChild(content[i]) } }
+  return e
+}
+// wrapper for elt, which removes the elt from the accessibility tree
+function eltP(tag, content, className, style) {
+  var e = elt(tag, content, className, style)
+  e.setAttribute("role", "presentation")
+  return e
+}
+
+var range
+if (document.createRange) { range = function(node, start, end, endNode) {
+  var r = document.createRange()
+  r.setEnd(endNode || node, end)
+  r.setStart(node, start)
+  return r
+} }
+else { range = function(node, start, end) {
+  var r = document.body.createTextRange()
+  try { r.moveToElementText(node.parentNode) }
+  catch(e) { return r }
+  r.collapse(true)
+  r.moveEnd("character", end)
+  r.moveStart("character", start)
+  return r
+} }
+
+function contains(parent, child) {
+  if (child.nodeType == 3) // Android browser always returns false when child is a textnode
+    { child = child.parentNode }
+  if (parent.contains)
+    { return parent.contains(child) }
+  do {
+    if (child.nodeType == 11) { child = child.host }
+    if (child == parent) { return true }
+  } while (child = child.parentNode)
+}
+
+function activeElt() {
+  // IE and Edge may throw an "Unspecified Error" when accessing document.activeElement.
+  // IE < 10 will throw when accessed while the page is loading or in an iframe.
+  // IE > 9 and Edge will throw when accessed in an iframe if document.body is unavailable.
+  var activeElement
+  try {
+    activeElement = document.activeElement
+  } catch(e) {
+    activeElement = document.body || null
+  }
+  while (activeElement && activeElement.shadowRoot && activeElement.shadowRoot.activeElement)
+    { activeElement = activeElement.shadowRoot.activeElement }
+  return activeElement
+}
+
+function addClass(node, cls) {
+  var current = node.className
+  if (!classTest(cls).test(current)) { node.className += (current ? " " : "") + cls }
+}
+function joinClasses(a, b) {
+  var as = a.split(" ")
+  for (var i = 0; i < as.length; i++)
+    { if (as[i] && !classTest(as[i]).test(b)) { b += " " + as[i] } }
+  return b
+}
+
+var selectInput = function(node) { node.select() }
+if (ios) // Mobile Safari apparently has a bug where select() is broken.
+  { selectInput = function(node) { node.selectionStart = 0; node.selectionEnd = node.value.length } }
+else if (ie) // Suppress mysterious IE10 errors
+  { selectInput = function(node) { try { node.select() } catch(_e) {} } }
+
+function bind(f) {
+  var args = Array.prototype.slice.call(arguments, 1)
+  return function(){return f.apply(null, args)}
+}
+
+function copyObj(obj, target, overwrite) {
+  if (!target) { target = {} }
+  for (var prop in obj)
+    { if (obj.hasOwnProperty(prop) && (overwrite !== false || !target.hasOwnProperty(prop)))
+      { target[prop] = obj[prop] } }
+  return target
+}
+
+// Counts the column offset in a string, taking tabs into account.
+// Used mostly to find indentation.
+function countColumn(string, end, tabSize, startIndex, startValue) {
+  if (end == null) {
+    end = string.search(/[^\s\u00a0]/)
+    if (end == -1) { end = string.length }
+  }
+  for (var i = startIndex || 0, n = startValue || 0;;) {
+    var nextTab = string.indexOf("\t", i)
+    if (nextTab < 0 || nextTab >= end)
+      { return n + (end - i) }
+    n += nextTab - i
+    n += tabSize - (n % tabSize)
+    i = nextTab + 1
+  }
+}
+
+var Delayed = function() {this.id = null};
+Delayed.prototype.set = function (ms, f) {
+  clearTimeout(this.id)
+  this.id = setTimeout(f, ms)
+};
+
+function indexOf(array, elt) {
+  for (var i = 0; i < array.length; ++i)
+    { if (array[i] == elt) { return i } }
+  return -1
+}
+
+// Number of pixels added to scroller and sizer to hide scrollbar
+var scrollerGap = 30
+
+// Returned or thrown by various protocols to signal 'I'm not
+// handling this'.
+var Pass = {toString: function(){return "CodeMirror.Pass"}}
+
+// Reused option objects for setSelection & friends
+var sel_dontScroll = {scroll: false};
+var sel_mouse = {origin: "*mouse"};
+var sel_move = {origin: "+move"};
+// The inverse of countColumn -- find the offset that corresponds to
+// a particular column.
+function findColumn(string, goal, tabSize) {
+  for (var pos = 0, col = 0;;) {
+    var nextTab = string.indexOf("\t", pos)
+    if (nextTab == -1) { nextTab = string.length }
+    var skipped = nextTab - pos
+    if (nextTab == string.length || col + skipped >= goal)
+      { return pos + Math.min(skipped, goal - col) }
+    col += nextTab - pos
+    col += tabSize - (col % tabSize)
+    pos = nextTab + 1
+    if (col >= goal) { return pos }
+  }
+}
+
+var spaceStrs = [""]
+function spaceStr(n) {
+  while (spaceStrs.length <= n)
+    { spaceStrs.push(lst(spaceStrs) + " ") }
+  return spaceStrs[n]
+}
+
+function lst(arr) { return arr[arr.length-1] }
+
+function map(array, f) {
+  var out = []
+  for (var i = 0; i < array.length; i++) { out[i] = f(array[i], i) }
+  return out
+}
+
+function insertSorted(array, value, score) {
+  var pos = 0, priority = score(value)
+  while (pos < array.length && score(array[pos]) <= priority) { pos++ }
+  array.splice(pos, 0, value)
+}
+
+function nothing() {}
+
+function createObj(base, props) {
+  var inst
+  if (Object.create) {
+    inst = Object.create(base)
+  } else {
+    nothing.prototype = base
+    inst = new nothing()
+  }
+  if (props) { copyObj(props, inst) }
+  return inst
+}
+
+var nonASCIISingleCaseWordChar = /[\u00df\u0587\u0590-\u05f4\u0600-\u06ff\u3040-\u309f\u30a0-\u30ff\u3400-\u4db5\u4e00-\u9fcc\uac00-\ud7af]/
+function isWordCharBasic(ch) {
+  return /\w/.test(ch) || ch > "\x80" &&
+    (ch.toUpperCase() != ch.toLowerCase() || nonASCIISingleCaseWordChar.test(ch))
+}
+function isWordChar(ch, helper) {
+  if (!helper) { return isWordCharBasic(ch) }
+  if (helper.source.indexOf("\\w") > -1 && isWordCharBasic(ch)) { return true }
+  return helper.test(ch)
+}
+
+function isEmpty(obj) {
+  for (var n in obj) { if (obj.hasOwnProperty(n) && obj[n]) { return false } }
+  return true
+}
+
+// Extending unicode characters. A series of a non-extending char +
+// any number of extending chars is treated as a single unit as far
+// as editing and measuring is concerned. This is not fully correct,
+// since some scripts/fonts/browsers also treat other configurations
+// of code points as a group.
+var extendingChars = /[\u0300-\u036f\u0483-\u0489\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u0610-\u061a\u064b-\u065e\u0670\u06d6-\u06dc\u06de-\u06e4\u06e7\u06e8\u06ea-\u06ed\u0711\u0730-\u074a\u07a6-\u07b0\u07eb-\u07f3\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0900-\u0902\u093c\u0941-\u0948\u094d\u0951-\u0955\u0962\u0963\u0981\u09bc\u09be\u09c1-\u09c4\u09cd\u09d7\u09e2\u09e3\u0a01\u0a02\u0a3c\u0a41\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a70\u0a71\u0a75\u0a81\u0a82\u0abc\u0ac1-\u0ac5\u0ac7\u0ac8\u0acd\u0ae2\u0ae3\u0b01\u0b3c\u0b3e\u0b3f\u0b41-\u0b44\u0b4d\u0b56\u0b57\u0b62\u0b63\u0b82\u0bbe\u0bc0\u0bcd\u0bd7\u0c3e-\u0c40\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0cbc\u0cbf\u0cc2\u0cc6\u0ccc\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0d3e\u0d41-\u0d44\u0d4d\u0d57\u0d62\u0d63\u0dca\u0dcf\u0dd2-\u0dd4\u0dd6\u0ddf\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0eb1\u0eb4-\u0eb9\u0ebb\u0ebc\u0ec8-\u0ecd\u0f18\u0f19\u0f35\u0f37\u0f39\u0f71-\u0f7e\u0f80-\u0f84\u0f86\u0f87\u0f90-\u0f97\u0f99-\u0fbc\u0fc6\u102d-\u1030\u1032-\u1037\u1039\u103a\u103d\u103e\u1058\u1059\u105e-\u1060\u1071-\u1074\u1082\u1085\u1086\u108d\u109d\u135f\u1712-\u1714\u1732-\u1734\u1752\u1753\u1772\u1773\u17b7-\u17bd\u17c6\u17c9-\u17d3\u17dd\u180b-\u180d\u18a9\u1920-\u1922\u1927\u1928\u1932\u1939-\u193b\u1a17\u1a18\u1a56\u1a58-\u1a5e\u1a60\u1a62\u1a65-\u1a6c\u1a73-\u1a7c\u1a7f\u1b00-\u1b03\u1b34\u1b36-\u1b3a\u1b3c\u1b42\u1b6b-\u1b73\u1b80\u1b81\u1ba2-\u1ba5\u1ba8\u1ba9\u1c2c-\u1c33\u1c36\u1c37\u1cd0-\u1cd2\u1cd4-\u1ce0\u1ce2-\u1ce8\u1ced\u1dc0-\u1de6\u1dfd-\u1dff\u200c\u200d\u20d0-\u20f0\u2cef-\u2cf1\u2de0-\u2dff\u302a-\u302f\u3099\u309a\ua66f-\ua672\ua67c\ua67d\ua6f0\ua6f1\ua802\ua806\ua80b\ua825\ua826\ua8c4\ua8e0-\ua8f1\ua926-\ua92d\ua947-\ua951\ua980-\ua982\ua9b3\ua9b6-\ua9b9\ua9bc\uaa29-\uaa2e\uaa31\uaa32\uaa35\uaa36\uaa43\uaa4c\uaab0\uaab2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uabe5\uabe8\uabed\udc00-\udfff\ufb1e\ufe00-\ufe0f\ufe20-\ufe26\uff9e\uff9f]/
+function isExtendingChar(ch) { return ch.charCodeAt(0) >= 768 && extendingChars.test(ch) }
+
+// Returns a number from the range [`0`; `str.length`] unless `pos` is outside that range.
+function skipExtendingChars(str, pos, dir) {
+  while ((dir < 0 ? pos > 0 : pos < str.length) && isExtendingChar(str.charAt(pos))) { pos += dir }
+  return pos
+}
+
+// Returns the value from the range [`from`; `to`] that satisfies
+// `pred` and is closest to `from`. Assumes that at least `to`
+// satisfies `pred`. Supports `from` being greater than `to`.
+function findFirst(pred, from, to) {
+  // At any point we are certain `to` satisfies `pred`, don't know
+  // whether `from` does.
+  var dir = from > to ? -1 : 1
+  for (;;) {
+    if (from == to) { return from }
+    var midF = (from + to) / 2, mid = dir < 0 ? Math.ceil(midF) : Math.floor(midF)
+    if (mid == from) { return pred(mid) ? from : to }
+    if (pred(mid)) { to = mid }
+    else { from = mid + dir }
+  }
+}
+
+// The display handles the DOM integration, both for input reading
+// and content drawing. It holds references to DOM nodes and
+// display-related state.
+
+function Display(place, doc, input) {
+  var d = this
+  this.input = input
+
+  // Covers bottom-right square when both scrollbars are present.
+  d.scrollbarFiller = elt("div", null, "CodeMirror-scrollbar-filler")
+  d.scrollbarFiller.setAttribute("cm-not-content", "true")
+  // Covers bottom of gutter when coverGutterNextToScrollbar is on
+  // and h scrollbar is present.
+  d.gutterFiller = elt("div", null, "CodeMirror-gutter-filler")
+  d.gutterFiller.setAttribute("cm-not-content", "true")
+  // Will contain the actual code, positioned to cover the viewport.
+  d.lineDiv = eltP("div", null, "CodeMirror-code")
+  // Elements are added to these to represent selection and cursors.
+  d.selectionDiv = elt("div", null, null, "position: relative; z-index: 1")
+  d.cursorDiv = elt("div", null, "CodeMirror-cursors")
+  // A visibility: hidden element used to find the size of things.
+  d.measure = elt("div", null, "CodeMirror-measure")
+  // When lines outside of the viewport are measured, they are drawn in this.
+  d.lineMeasure = elt("div", null, "CodeMirror-measure")
+  // Wraps everything that needs to exist inside the vertically-padded coordinate system
+  d.lineSpace = eltP("div", [d.measure, d.lineMeasure, d.selectionDiv, d.cursorDiv, d.lineDiv],
+                    null, "position: relative; outline: none")
+  var lines = eltP("div", [d.lineSpace], "CodeMirror-lines")
+  // Moved around its parent to cover visible view.
+  d.mover = elt("div", [lines], null, "position: relative")
+  // Set to the height of the document, allowing scrolling.
+  d.sizer = elt("div", [d.mover], "CodeMirror-sizer")
+  d.sizerWidth = null
+  // Behavior of elts with overflow: auto and padding is
+  // inconsistent across browsers. This is used to ensure the
+  // scrollable area is big enough.
+  d.heightForcer = elt("div", null, null, "position: absolute; height: " + scrollerGap + "px; width: 1px;")
+  // Will contain the gutters, if any.
+  d.gutters = elt("div", null, "CodeMirror-gutters")
+  d.lineGutter = null
+  // Actual scrollable element.
+  d.scroller = elt("div", [d.sizer, d.heightForcer, d.gutters], "CodeMirror-scroll")
+  d.scroller.setAttribute("tabIndex", "-1")
+  // The element in which the editor lives.
+  d.wrapper = elt("div", [d.scrollbarFiller, d.gutterFiller, d.scroller], "CodeMirror")
+
+  // Work around IE7 z-index bug (not perfect, hence IE7 not really being supported)
+  if (ie && ie_version < 8) { d.gutters.style.zIndex = -1; d.scroller.style.paddingRight = 0 }
+  if (!webkit && !(gecko && mobile)) { d.scroller.draggable = true }
+
+  if (place) {
+    if (place.appendChild) { place.appendChild(d.wrapper) }
+    else { place(d.wrapper) }
+  }
+
+  // Current rendered range (may be bigger than the view window).
+  d.viewFrom = d.viewTo = doc.first
+  d.reportedViewFrom = d.reportedViewTo = doc.first
+  // Information about the rendered lines.
+  d.view = []
+  d.renderedView = null
+  // Holds info about a single rendered line when it was rendered
+  // for measurement, while not in view.
+  d.externalMeasured = null
+  // Empty space (in pixels) above the view
+  d.viewOffset = 0
+  d.lastWrapHeight = d.lastWrapWidth = 0
+  d.updateLineNumbers = null
+
+  d.nativeBarWidth = d.barHeight = d.barWidth = 0
+  d.scrollbarsClipped = false
+
+  // Used to only resize the line number gutter when necessary (when
+  // the amount of lines crosses a boundary that makes its width change)
+  d.lineNumWidth = d.lineNumInnerWidth = d.lineNumChars = null
+  // Set to true when a non-horizontal-scrolling line widget is
+  // added. As an optimization, line widget aligning is skipped when
+  // this is false.
+  d.alignWidgets = false
+
+  d.cachedCharWidth = d.cachedTextHeight = d.cachedPaddingH = null
+
+  // Tracks the maximum line length so that the horizontal scrollbar
+  // can be kept static when scrolling.
+  d.maxLine = null
+  d.maxLineLength = 0
+  d.maxLineChanged = false
+
+  // Used for measuring wheel scrolling granularity
+  d.wheelDX = d.wheelDY = d.wheelStartX = d.wheelStartY = null
+
+  // True when shift is held down.
+  d.shift = false
+
+  // Used to track whether anything happened since the context menu
+  // was opened.
+  d.selForContextMenu = null
+
+  d.activeTouch = null
+
+  input.init(d)
+}
+
+// Find the line object corresponding to the given line number.
+function getLine(doc, n) {
+  n -= doc.first
+  if (n < 0 || n >= doc.size) { throw new Error("There is no line " + (n + doc.first) + " in the document.") }
+  var chunk = doc
+  while (!chunk.lines) {
+    for (var i = 0;; ++i) {
+      var child = chunk.children[i], sz = child.chunkSize()
+      if (n < sz) { chunk = child; break }
+      n -= sz
+    }
+  }
+  return chunk.lines[n]
+}
+
+// Get the part of a document between two positions, as an array of
+// strings.
+function getBetween(doc, start, end) {
+  var out = [], n = start.line
+  doc.iter(start.line, end.line + 1, function (line) {
+    var text = line.text
+    if (n == end.line) { text = text.slice(0, end.ch) }
+    if (n == start.line) { text = text.slice(start.ch) }
+    out.push(text)
+    ++n
+  })
+  return out
+}
+// Get the lines between from and to, as array of strings.
+function getLines(doc, from, to) {
+  var out = []
+  doc.iter(from, to, function (line) { out.push(line.text) }) // iter aborts when callback returns truthy value
+  return out
+}
+
+// Update the height of a line, propagating the height change
+// upwards to parent nodes.
+function updateLineHeight(line, height) {
+  var diff = height - line.height
+  if (diff) { for (var n = line; n; n = n.parent) { n.height += diff } }
+}
+
+// Given a line object, find its line number by walking up through
+// its parent links.
+function lineNo(line) {
+  if (line.parent == null) { return null }
+  var cur = line.parent, no = indexOf(cur.lines, line)
+  for (var chunk = cur.parent; chunk; cur = chunk, chunk = chunk.parent) {
+    for (var i = 0;; ++i) {
+      if (chunk.children[i] == cur) { break }
+      no += chunk.children[i].chunkSize()
+    }
+  }
+  return no + cur.first
+}
+
+// Find the line at the given vertical position, using the height
+// information in the document tree.
+function lineAtHeight(chunk, h) {
+  var n = chunk.first
+  outer: do {
+    for (var i$1 = 0; i$1 < chunk.children.length; ++i$1) {
+      var child = chunk.children[i$1], ch = child.height
+      if (h < ch) { chunk = child; continue outer }
+      h -= ch
+      n += child.chunkSize()
+    }
+    return n
+  } while (!chunk.lines)
+  var i = 0
+  for (; i < chunk.lines.length; ++i) {
+    var line = chunk.lines[i], lh = line.height
+    if (h < lh) { break }
+    h -= lh
+  }
+  return n + i
+}
+
+function isLine(doc, l) {return l >= doc.first && l < doc.first + doc.size}
+
+function lineNumberFor(options, i) {
+  return String(options.lineNumberFormatter(i + options.firstLineNumber))
+}
+
+// A Pos instance represents a position within the text.
+function Pos(line, ch, sticky) {
+  if ( sticky === void 0 ) sticky = null;
+
+  if (!(this instanceof Pos)) { return new Pos(line, ch, sticky) }
+  this.line = line
+  this.ch = ch
+  this.sticky = sticky
+}
+
+// Compare two positions, return 0 if they are the same, a negative
+// number when a is less, and a positive number otherwise.
+function cmp(a, b) { return a.line - b.line || a.ch - b.ch }
+
+function equalCursorPos(a, b) { return a.sticky == b.sticky && cmp(a, b) == 0 }
+
+function copyPos(x) {return Pos(x.line, x.ch)}
+function maxPos(a, b) { return cmp(a, b) < 0 ? b : a }
+function minPos(a, b) { return cmp(a, b) < 0 ? a : b }
+
+// Most of the external API clips given positions to make sure they
+// actually exist within the document.
+function clipLine(doc, n) {return Math.max(doc.first, Math.min(n, doc.first + doc.size - 1))}
+function clipPos(doc, pos) {
+  if (pos.line < doc.first) { return Pos(doc.first, 0) }
+  var last = doc.first + doc.size - 1
+  if (pos.line > last) { return Pos(last, getLine(doc, last).text.length) }
+  return clipToLen(pos, getLine(doc, pos.line).text.length)
+}
+function clipToLen(pos, linelen) {
+  var ch = pos.ch
+  if (ch == null || ch > linelen) { return Pos(pos.line, linelen) }
+  else if (ch < 0) { return Pos(pos.line, 0) }
+  else { return pos }
+}
+function clipPosArray(doc, array) {
+  var out = []
+  for (var i = 0; i < array.length; i++) { out[i] = clipPos(doc, array[i]) }
+  return out
+}
+
+// Optimize some code when these features are not used.
+var sawReadOnlySpans = false;
+var sawCollapsedSpans = false;
+function seeReadOnlySpans() {
+  sawReadOnlySpans = true
+}
+
+function seeCollapsedSpans() {
+  sawCollapsedSpans = true
+}
+
+// TEXTMARKER SPANS
+
+function MarkedSpan(marker, from, to) {
+  this.marker = marker
+  this.from = from; this.to = to
+}
+
+// Search an array of spans for a span matching the given marker.
+function getMarkedSpanFor(spans, marker) {
+  if (spans) { for (var i = 0; i < spans.length; ++i) {
+    var span = spans[i]
+    if (span.marker == marker) { return span }
+  } }
+}
+// Remove a span from an array, returning undefined if no spans are
+// left (we don't store arrays for lines without spans).
+function removeMarkedSpan(spans, span) {
+  var r
+  for (var i = 0; i < spans.length; ++i)
+    { if (spans[i] != span) { (r || (r = [])).push(spans[i]) } }
+  return r
+}
+// Add a span to a line.
+function addMarkedSpan(line, span) {
+  line.markedSpans = line.markedSpans ? line.markedSpans.concat([span]) : [span]
+  span.marker.attachLine(line)
+}
+
+// Used for the algorithm that adjusts markers for a change in the
+// document. These functions cut an array of spans at a given
+// character position, returning an array of remaining chunks (or
+// undefined if nothing remains).
+function markedSpansBefore(old, startCh, isInsert) {
+  var nw
+  if (old) { for (var i = 0; i < old.length; ++i) {
+    var span = old[i], marker = span.marker
+    var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= startCh : span.from < startCh)
+    if (startsBefore || span.from == startCh && marker.type == "bookmark" && (!isInsert || !span.marker.insertLeft)) {
+      var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= startCh : span.to > startCh)
+      ;(nw || (nw = [])).push(new MarkedSpan(marker, span.from, endsAfter ? null : span.to))
+    }
+  } }
+  return nw
+}
+function markedSpansAfter(old, endCh, isInsert) {
+  var nw
+  if (old) { for (var i = 0; i < old.length; ++i) {
+    var span = old[i], marker = span.marker
+    var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= endCh : span.to > endCh)
+    if (endsAfter || span.from == endCh && marker.type == "bookmark" && (!isInsert || span.marker.insertLeft)) {
+      var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= endCh : span.from < endCh)
+      ;(nw || (nw = [])).push(new MarkedSpan(marker, startsBefore ? null : span.from - endCh,
+                                            span.to == null ? null : span.to - endCh))
+    }
+  } }
+  return nw
+}
+
+// Given a change object, compute the new set of marker spans that
+// cover the line in which the change took place. Removes spans
+// entirely within the change, reconnects spans belonging to the
+// same marker that appear on both sides of the change, and cuts off
+// spans partially within the change. Returns an array of span
+// arrays with one element for each line in (after) the change.
+function stretchSpansOverChange(doc, change) {
+  if (change.full) { return null }
+  var oldFirst = isLine(doc, change.from.line) && getLine(doc, change.from.line).markedSpans
+  var oldLast = isLine(doc, change.to.line) && getLine(doc, change.to.line).markedSpans
+  if (!oldFirst && !oldLast) { return null }
+
+  var startCh = change.from.ch, endCh = change.to.ch, isInsert = cmp(change.from, change.to) == 0
+  // Get the spans that 'stick out' on both sides
+  var first = markedSpansBefore(oldFirst, startCh, isInsert)
+  var last = markedSpansAfter(oldLast, endCh, isInsert)
+
+  // Next, merge those two ends
+  var sameLine = change.text.length == 1, offset = lst(change.text).length + (sameLine ? startCh : 0)
+  if (first) {
+    // Fix up .to properties of first
+    for (var i = 0; i < first.length; ++i) {
+      var span = first[i]
+      if (span.to == null) {
+        var found = getMarkedSpanFor(last, span.marker)
+        if (!found) { span.to = startCh }
+        else if (sameLine) { span.to = found.to == null ? null : found.to + offset }
+      }
+    }
+  }
+  if (last) {
+    // Fix up .from in last (or move them into first in case of sameLine)
+    for (var i$1 = 0; i$1 < last.length; ++i$1) {
+      var span$1 = last[i$1]
+      if (span$1.to != null) { span$1.to += offset }
+      if (span$1.from == null) {
+        var found$1 = getMarkedSpanFor(first, span$1.marker)
+        if (!found$1) {
+          span$1.from = offset
+          if (sameLine) { (first || (first = [])).push(span$1) }
+        }
+      } else {
+        span$1.from += offset
+        if (sameLine) { (first || (first = [])).push(span$1) }
+      }
+    }
+  }
+  // Make sure we didn't create any zero-length spans
+  if (first) { first = clearEmptySpans(first) }
+  if (last && last != first) { last = clearEmptySpans(last) }
+
+  var newMarkers = [first]
+  if (!sameLine) {
+    // Fill gap with whole-line-spans
+    var gap = change.text.length - 2, gapMarkers
+    if (gap > 0 && first)
+      { for (var i$2 = 0; i$2 < first.length; ++i$2)
+        { if (first[i$2].to == null)
+          { (gapMarkers || (gapMarkers = [])).push(new MarkedSpan(first[i$2].marker, null, null)) } } }
+    for (var i$3 = 0; i$3 < gap; ++i$3)
+      { newMarkers.push(gapMarkers) }
+    newMarkers.push(last)
+  }
+  return newMarkers
+}
+
+// Remove spans that are empty and don't have a clearWhenEmpty
+// option of false.
+function clearEmptySpans(spans) {
+  for (var i = 0; i < spans.length; ++i) {
+    var span = spans[i]
+    if (span.from != null && span.from == span.to && span.marker.clearWhenEmpty !== false)
+      { spans.splice(i--, 1) }
+  }
+  if (!spans.length) { return null }
+  return spans
+}
+
+// Used to 'clip' out readOnly ranges when making a change.
+function removeReadOnlyRanges(doc, from, to) {
+  var markers = null
+  doc.iter(from.line, to.line + 1, function (line) {
+    if (line.markedSpans) { for (var i = 0; i < line.markedSpans.length; ++i) {
+      var mark = line.markedSpans[i].marker
+      if (mark.readOnly && (!markers || indexOf(markers, mark) == -1))
+        { (markers || (markers = [])).push(mark) }
+    } }
+  })
+  if (!markers) { return null }
+  var parts = [{from: from, to: to}]
+  for (var i = 0; i < markers.length; ++i) {
+    var mk = markers[i], m = mk.find(0)
+    for (var j = 0; j < parts.length; ++j) {
+      var p = parts[j]
+      if (cmp(p.to, m.from) < 0 || cmp(p.from, m.to) > 0) { continue }
+      var newParts = [j, 1], dfrom = cmp(p.from, m.from), dto = cmp(p.to, m.to)
+      if (dfrom < 0 || !mk.inclusiveLeft && !dfrom)
+        { newParts.push({from: p.from, to: m.from}) }
+      if (dto > 0 || !mk.inclusiveRight && !dto)
+        { newParts.push({from: m.to, to: p.to}) }
+      parts.splice.apply(parts, newParts)
+      j += newParts.length - 3
+    }
+  }
+  return parts
+}
+
+// Connect or disconnect spans from a line.
+function detachMarkedSpans(line) {
+  var spans = line.markedSpans
+  if (!spans) { return }
+  for (var i = 0; i < spans.length; ++i)
+    { spans[i].marker.detachLine(line) }
+  line.markedSpans = null
+}
+function attachMarkedSpans(line, spans) {
+  if (!spans) { return }
+  for (var i = 0; i < spans.length; ++i)
+    { spans[i].marker.attachLine(line) }
+  line.markedSpans = spans
+}
+
+// Helpers used when computing which overlapping collapsed span
+// counts as the larger one.
+function extraLeft(marker) { return marker.inclusiveLeft ? -1 : 0 }
+function extraRight(marker) { return marker.inclusiveRight ? 1 : 0 }
+
+// Returns a number indicating which of two overlapping collapsed
+// spans is larger (and thus includes the other). Falls back to
+// comparing ids when the spans cover exactly the same range.
+function compareCollapsedMarkers(a, b) {
+  var lenDiff = a.lines.length - b.lines.length
+  if (lenDiff != 0) { return lenDiff }
+  var aPos = a.find(), bPos = b.find()
+  var fromCmp = cmp(aPos.from, bPos.from) || extraLeft(a) - extraLeft(b)
+  if (fromCmp) { return -fromCmp }
+  var toCmp = cmp(aPos.to, bPos.to) || extraRight(a) - extraRight(b)
+  if (toCmp) { return toCmp }
+  return b.id - a.id
+}
+
+// Find out whether a line ends or starts in a collapsed span. If
+// so, return the marker for that span.
+function collapsedSpanAtSide(line, start) {
+  var sps = sawCollapsedSpans && line.markedSpans, found
+  if (sps) { for (var sp = (void 0), i = 0; i < sps.length; ++i) {
+    sp = sps[i]
+    if (sp.marker.collapsed && (start ? sp.from : sp.to) == null &&
+        (!found || compareCollapsedMarkers(found, sp.marker) < 0))
+      { found = sp.marker }
+  } }
+  return found
+}
+function collapsedSpanAtStart(line) { return collapsedSpanAtSide(line, true) }
+function collapsedSpanAtEnd(line) { return collapsedSpanAtSide(line, false) }
+
+// Test whether there exists a collapsed span that partially
+// overlaps (covers the start or end, but not both) of a new span.
+// Such overlap is not allowed.
+function conflictingCollapsedRange(doc, lineNo, from, to, marker) {
+  var line = getLine(doc, lineNo)
+  var sps = sawCollapsedSpans && line.markedSpans
+  if (sps) { for (var i = 0; i < sps.length; ++i) {
+    var sp = sps[i]
+    if (!sp.marker.collapsed) { continue }
+    var found = sp.marker.find(0)
+    var fromCmp = cmp(found.from, from) || extraLeft(sp.marker) - extraLeft(marker)
+    var toCmp = cmp(found.to, to) || extraRight(sp.marker) - extraRight(marker)
+    if (fromCmp >= 0 && toCmp <= 0 || fromCmp <= 0 && toCmp >= 0) { continue }
+    if (fromCmp <= 0 && (sp.marker.inclusiveRight && marker.inclusiveLeft ? cmp(found.to, from) >= 0 : cmp(found.to, from) > 0) ||
+        fromCmp >= 0 && (sp.marker.inclusiveRight && marker.inclusiveLeft ? cmp(found.from, to) <= 0 : cmp(found.from, to) < 0))
+      { return true }
+  } }
+}
+
+// A visual line is a line as drawn on the screen. Folding, for
+// example, can cause multiple logical lines to appear on the same
+// visual line. This finds the start of the visual line that the
+// given line is part of (usually that is the line itself).
+function visualLine(line) {
+  var merged
+  while (merged = collapsedSpanAtStart(line))
+    { line = merged.find(-1, true).line }
+  return line
+}
+
+function visualLineEnd(line) {
+  var merged
+  while (merged = collapsedSpanAtEnd(line))
+    { line = merged.find(1, true).line }
+  return line
+}
+
+// Returns an array of logical lines that continue the visual line
+// started by the argument, or undefined if there are no such lines.
+function visualLineContinued(line) {
+  var merged, lines
+  while (merged = collapsedSpanAtEnd(line)) {
+    line = merged.find(1, true).line
+    ;(lines || (lines = [])).push(line)
+  }
+  return lines
+}
+
+// Get the line number of the start of the visual line that the
+// given line number is part of.
+function visualLineNo(doc, lineN) {
+  var line = getLine(doc, lineN), vis = visualLine(line)
+  if (line == vis) { return lineN }
+  return lineNo(vis)
+}
+
+// Get the line number of the start of the next visual line after
+// the given line.
+function visualLineEndNo(doc, lineN) {
+  if (lineN > doc.lastLine()) { return lineN }
+  var line = getLine(doc, lineN), merged
+  if (!lineIsHidden(doc, line)) { return lineN }
+  while (merged = collapsedSpanAtEnd(line))
+    { line = merged.find(1, true).line }
+  return lineNo(line) + 1
+}
+
+// Compute whether a line is hidden. Lines count as hidden when they
+// are part of a visual line that starts with another line, or when
+// they are entirely covered by collapsed, non-widget span.
+function lineIsHidden(doc, line) {
+  var sps = sawCollapsedSpans && line.markedSpans
+  if (sps) { for (var sp = (void 0), i = 0; i < sps.length; ++i) {
+    sp = sps[i]
+    if (!sp.marker.collapsed) { continue }
+    if (sp.from == null) { return true }
+    if (sp.marker.widgetNode) { continue }
+    if (sp.from == 0 && sp.marker.inclusiveLeft && lineIsHiddenInner(doc, line, sp))
+      { return true }
+  } }
+}
+function lineIsHiddenInner(doc, line, span) {
+  if (span.to == null) {
+    var end = span.marker.find(1, true)
+    return lineIsHiddenInner(doc, end.line, getMarkedSpanFor(end.line.markedSpans, span.marker))
+  }
+  if (span.marker.inclusiveRight && span.to == line.text.length)
+    { return true }
+  for (var sp = (void 0), i = 0; i < line.markedSpans.length; ++i) {
+    sp = line.markedSpans[i]
+    if (sp.marker.collapsed && !sp.marker.widgetNode && sp.from == span.to &&
+        (sp.to == null || sp.to != span.from) &&
+        (sp.marker.inclusiveLeft || span.marker.inclusiveRight) &&
+        lineIsHiddenInner(doc, line, sp)) { return true }
+  }
+}
+
+// Find the height above the given line.
+function heightAtLine(lineObj) {
+  lineObj = visualLine(lineObj)
+
+  var h = 0, chunk = lineObj.parent
+  for (var i = 0; i < chunk.lines.length; ++i) {
+    var line = chunk.lines[i]
+    if (line == lineObj) { break }
+    else { h += line.height }
+  }
+  for (var p = chunk.parent; p; chunk = p, p = chunk.parent) {
+    for (var i$1 = 0; i$1 < p.children.length; ++i$1) {
+      var cur = p.children[i$1]
+      if (cur == chunk) { break }
+      else { h += cur.height }
+    }
+  }
+  return h
+}
+
+// Compute the character length of a line, taking into account
+// collapsed ranges (see markText) that might hide parts, and join
+// other lines onto it.
+function lineLength(line) {
+  if (line.height == 0) { return 0 }
+  var len = line.text.length, merged, cur = line
+  while (merged = collapsedSpanAtStart(cur)) {
+    var found = merged.find(0, true)
+    cur = found.from.line
+    len += found.from.ch - found.to.ch
+  }
+  cur = line
+  while (merged = collapsedSpanAtEnd(cur)) {
+    var found$1 = merged.find(0, true)
+    len -= cur.text.length - found$1.from.ch
+    cur = found$1.to.line
+    len += cur.text.length - found$1.to.ch
+  }
+  return len
+}
+
+// Find the longest line in the document.
+function findMaxLine(cm) {
+  var d = cm.display, doc = cm.doc
+  d.maxLine = getLine(doc, doc.first)
+  d.maxLineLength = lineLength(d.maxLine)
+  d.maxLineChanged = true
+  doc.iter(function (line) {
+    var len = lineLength(line)
+    if (len > d.maxLineLength) {
+      d.maxLineLength = len
+      d.maxLine = line
+    }
+  })
+}
+
+// BIDI HELPERS
+
+function iterateBidiSections(order, from, to, f) {
+  if (!order) { return f(from, to, "ltr", 0) }
+  var found = false
+  for (var i = 0; i < order.length; ++i) {
+    var part = order[i]
+    if (part.from < to && part.to > from || from == to && part.to == from) {
+      f(Math.max(part.from, from), Math.min(part.to, to), part.level == 1 ? "rtl" : "ltr", i)
+      found = true
+    }
+  }
+  if (!found) { f(from, to, "ltr") }
+}
+
+var bidiOther = null
+function getBidiPartAt(order, ch, sticky) {
+  var found
+  bidiOther = null
+  for (var i = 0; i < order.length; ++i) {
+    var cur = order[i]
+    if (cur.from < ch && cur.to > ch) { return i }
+    if (cur.to == ch) {
+      if (cur.from != cur.to && sticky == "before") { found = i }
+      else { bidiOther = i }
+    }
+    if (cur.from == ch) {
+      if (cur.from != cur.to && sticky != "before") { found = i }
+      else { bidiOther = i }
+    }
+  }
+  return found != null ? found : bidiOther
+}
+
+// Bidirectional ordering algorithm
+// See http://unicode.org/reports/tr9/tr9-13.html for the algorithm
+// that this (partially) implements.
+
+// One-char codes used for character types:
+// L (L):   Left-to-Right
+// R (R):   Right-to-Left
+// r (AL):  Right-to-Left Arabic
+// 1 (EN):  European Number
+// + (ES):  European Number Separator
+// % (ET):  European Number Terminator
+// n (AN):  Arabic Number
+// , (CS):  Common Number Separator
+// m (NSM): Non-Spacing Mark
+// b (BN):  Boundary Neutral
+// s (B):   Paragraph Separator
+// t (S):   Segment Separator
+// w (WS):  Whitespace
+// N (ON):  Other Neutrals
+
+// Returns null if characters are ordered as they appear
+// (left-to-right), or an array of sections ({from, to, level}
+// objects) in the order in which they occur visually.
+var bidiOrdering = (function() {
+  // Character types for codepoints 0 to 0xff
+  var lowTypes = "bbbbbbbbbtstwsbbbbbbbbbbbbbbssstwNN%%%NNNNNN,N,N1111111111NNNNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNbbbbbbsbbbbbbbbbbbbbbbbbbbbbbbbbb,N%%%%NNNNLNNNNN%%11NLNNN1LNNNNNLLLLLLLLLLLLLLLLLLLLLLLNLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLN"
+  // Character types for codepoints 0x600 to 0x6f9
+  var arabicTypes = "nnnnnnNNr%%r,rNNmmmmmmmmmmmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmmmmmmmmmmmmmmmnnnnnnnnnn%nnrrrmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmnNmmmmmmrrmmNmmmmrr1111111111"
+  function charType(code) {
+    if (code <= 0xf7) { return lowTypes.charAt(code) }
+    else if (0x590 <= code && code <= 0x5f4) { return "R" }
+    else if (0x600 <= code && code <= 0x6f9) { return arabicTypes.charAt(code - 0x600) }
+    else if (0x6ee <= code && code <= 0x8ac) { return "r" }
+    else if (0x2000 <= code && code <= 0x200b) { return "w" }
+    else if (code == 0x200c) { return "b" }
+    else { return "L" }
+  }
+
+  var bidiRE = /[\u0590-\u05f4\u0600-\u06ff\u0700-\u08ac]/
+  var isNeutral = /[stwN]/, isStrong = /[LRr]/, countsAsLeft = /[Lb1n]/, countsAsNum = /[1n]/
+
+  function BidiSpan(level, from, to) {
+    this.level = level
+    this.from = from; this.to = to
+  }
+
+  return function(str, direction) {
+    var outerType = direction == "ltr" ? "L" : "R"
+
+    if (str.length == 0 || direction == "ltr" && !bidiRE.test(str)) { return false }
+    var len = str.length, types = []
+    for (var i = 0; i < len; ++i)
+      { types.push(charType(str.charCodeAt(i))) }
+
+    // W1. Examine each non-spacing mark (NSM) in the level run, and
+    // change the type of the NSM to the type of the previous
+    // character. If the NSM is at the start of the level run, it will
+    // get the type of sor.
+    for (var i$1 = 0, prev = outerType; i$1 < len; ++i$1) {
+      var type = types[i$1]
+      if (type == "m") { types[i$1] = prev }
+      else { prev = type }
+    }
+
+    // W2. Search backwards from each instance of a European number
+    // until the first strong type (R, L, AL, or sor) is found. If an
+    // AL is found, change the type of the European number to Arabic
+    // number.
+    // W3. Change all ALs to R.
+    for (var i$2 = 0, cur = outerType; i$2 < len; ++i$2) {
+      var type$1 = types[i$2]
+      if (type$1 == "1" && cur == "r") { types[i$2] = "n" }
+      else if (isStrong.test(type$1)) { cur = type$1; if (type$1 == "r") { types[i$2] = "R" } }
+    }
+
+    // W4. A single European separator between two European numbers
+    // changes to a European number. A single common separator between
+    // two numbers of the same type changes to that type.
+    for (var i$3 = 1, prev$1 = types[0]; i$3 < len - 1; ++i$3) {
+      var type$2 = types[i$3]
+      if (type$2 == "+" && prev$1 == "1" && types[i$3+1] == "1") { types[i$3] = "1" }
+      else if (type$2 == "," && prev$1 == types[i$3+1] &&
+               (prev$1 == "1" || prev$1 == "n")) { types[i$3] = prev$1 }
+      prev$1 = type$2
+    }
+
+    // W5. A sequence of European terminators adjacent to European
+    // numbers changes to all European numbers.
+    // W6. Otherwise, separators and terminators change to Other
+    // Neutral.
+    for (var i$4 = 0; i$4 < len; ++i$4) {
+      var type$3 = types[i$4]
+      if (type$3 == ",") { types[i$4] = "N" }
+      else if (type$3 == "%") {
+        var end = (void 0)
+        for (end = i$4 + 1; end < len && types[end] == "%"; ++end) {}
+        var replace = (i$4 && types[i$4-1] == "!") || (end < len && types[end] == "1") ? "1" : "N"
+        for (var j = i$4; j < end; ++j) { types[j] = replace }
+        i$4 = end - 1
+      }
+    }
+
+    // W7. Search backwards from each instance of a European number
+    // until the first strong type (R, L, or sor) is found. If an L is
+    // found, then change the type of the European number to L.
+    for (var i$5 = 0, cur$1 = outerType; i$5 < len; ++i$5) {
+      var type$4 = types[i$5]
+      if (cur$1 == "L" && type$4 == "1") { types[i$5] = "L" }
+      else if (isStrong.test(type$4)) { cur$1 = type$4 }
+    }
+
+    // N1. A sequence of neutrals takes the direction of the
+    // surrounding strong text if the text on both sides has the same
+    // direction. European and Arabic numbers act as if they were R in
+    // terms of their influence on neutrals. Start-of-level-run (sor)
+    // and end-of-level-run (eor) are used at level run boundaries.
+    // N2. Any remaining neutrals take the embedding direction.
+    for (var i$6 = 0; i$6 < len; ++i$6) {
+      if (isNeutral.test(types[i$6])) {
+        var end$1 = (void 0)
+        for (end$1 = i$6 + 1; end$1 < len && isNeutral.test(types[end$1]); ++end$1) {}
+        var before = (i$6 ? types[i$6-1] : outerType) == "L"
+        var after = (end$1 < len ? types[end$1] : outerType) == "L"
+        var replace$1 = before == after ? (before ? "L" : "R") : outerType
+        for (var j$1 = i$6; j$1 < end$1; ++j$1) { types[j$1] = replace$1 }
+        i$6 = end$1 - 1
+      }
+    }
+
+    // Here we depart from the documented algorithm, in order to avoid
+    // building up an actual levels array. Since there are only three
+    // levels (0, 1, 2) in an implementation that doesn't take
+    // explicit embedding into account, we can build up the order on
+    // the fly, without following the level-based algorithm.
+    var order = [], m
+    for (var i$7 = 0; i$7 < len;) {
+      if (countsAsLeft.test(types[i$7])) {
+        var start = i$7
+        for (++i$7; i$7 < len && countsAsLeft.test(types[i$7]); ++i$7) {}
+        order.push(new BidiSpan(0, start, i$7))
+      } else {
+        var pos = i$7, at = order.length
+        for (++i$7; i$7 < len && types[i$7] != "L"; ++i$7) {}
+        for (var j$2 = pos; j$2 < i$7;) {
+          if (countsAsNum.test(types[j$2])) {
+            if (pos < j$2) { order.splice(at, 0, new BidiSpan(1, pos, j$2)) }
+            var nstart = j$2
+            for (++j$2; j$2 < i$7 && countsAsNum.test(types[j$2]); ++j$2) {}
+            order.splice(at, 0, new BidiSpan(2, nstart, j$2))
+            pos = j$2
+          } else { ++j$2 }
+        }
+        if (pos < i$7) { order.splice(at, 0, new BidiSpan(1, pos, i$7)) }
+      }
+    }
+    if (order[0].level == 1 && (m = str.match(/^\s+/))) {
+      order[0].from = m[0].length
+      order.unshift(new BidiSpan(0, 0, m[0].length))
+    }
+    if (lst(order).level == 1 && (m = str.match(/\s+$/))) {
+      lst(order).to -= m[0].length
+      order.push(new BidiSpan(0, len - m[0].length, len))
+    }
+
+    return direction == "rtl" ? order.reverse() : order
+  }
+})()
+
+// Get the bidi ordering for the given line (and cache it). Returns
+// false for lines that are fully left-to-right, and an array of
+// BidiSpan objects otherwise.
+function getOrder(line, direction) {
+  var order = line.order
+  if (order == null) { order = line.order = bidiOrdering(line.text, direction) }
+  return order
+}
+
+// EVENT HANDLING
+
+// Lightweight event framework. on/off also work on DOM nodes,
+// registering native DOM handlers.
+
+var noHandlers = []
+
+var on = function(emitter, type, f) {
+  if (emitter.addEventListener) {
+    emitter.addEventListener(type, f, false)
+  } else if (emitter.attachEvent) {
+    emitter.attachEvent("on" + type, f)
+  } else {
+    var map = emitter._handlers || (emitter._handlers = {})
+    map[type] = (map[type] || noHandlers).concat(f)
+  }
+}
+
+function getHandlers(emitter, type) {
+  return emitter._handlers && emitter._handlers[type] || noHandlers
+}
+
+function off(emitter, type, f) {
+  if (emitter.removeEventListener) {
+    emitter.removeEventListener(type, f, false)
+  } else if (emitter.detachEvent) {
+    emitter.detachEvent("on" + type, f)
+  } else {
+    var map = emitter._handlers, arr = map && map[type]
+    if (arr) {
+      var index = indexOf(arr, f)
+      if (index > -1)
+        { map[type] = arr.slice(0, index).concat(arr.slice(index + 1)) }
+    }
+  }
+}
+
+function signal(emitter, type /*, values...*/) {
+  var handlers = getHandlers(emitter, type)
+  if (!handlers.length) { return }
+  var args = Array.prototype.slice.call(arguments, 2)
+  for (var i = 0; i < handlers.length; ++i) { handlers[i].apply(null, args) }
+}
+
+// The DOM events that CodeMirror handles can be overridden by
+// registering a (non-DOM) handler on the editor for the event name,
+// and preventDefault-ing the event in that handler.
+function signalDOMEvent(cm, e, override) {
+  if (typeof e == "string")
+    { e = {type: e, preventDefault: function() { this.defaultPrevented = true }} }
+  signal(cm, override || e.type, cm, e)
+  return e_defaultPrevented(e) || e.codemirrorIgnore
+}
+
+function signalCursorActivity(cm) {
+  var arr = cm._handlers && cm._handlers.cursorActivity
+  if (!arr) { return }
+  var set = cm.curOp.cursorActivityHandlers || (cm.curOp.cursorActivityHandlers = [])
+  for (var i = 0; i < arr.length; ++i) { if (indexOf(set, arr[i]) == -1)
+    { set.push(arr[i]) } }
+}
+
+function hasHandler(emitter, type) {
+  return getHandlers(emitter, type).length > 0
+}
+
+// Add on and off methods to a constructor's prototype, to make
+// registering events on such objects more convenient.
+function eventMixin(ctor) {
+  ctor.prototype.on = function(type, f) {on(this, type, f)}
+  ctor.prototype.off = function(type, f) {off(this, type, f)}
+}
+
+// Due to the fact that we still support jurassic IE versions, some
+// compatibility wrappers are needed.
+
+function e_preventDefault(e) {
+  if (e.preventDefault) { e.preventDefault() }
+  else { e.returnValue = false }
+}
+function e_stopPropagation(e) {
+  if (e.stopPropagation) { e.stopPropagation() }
+  else { e.cancelBubble = true }
+}
+function e_defaultPrevented(e) {
+  return e.defaultPrevented != null ? e.defaultPrevented : e.returnValue == false
+}
+function e_stop(e) {e_preventDefault(e); e_stopPropagation(e)}
+
+function e_target(e) {return e.target || e.srcElement}
+function e_button(e) {
+  var b = e.which
+  if (b == null) {
+    if (e.button & 1) { b = 1 }
+    else if (e.button & 2) { b = 3 }
+    else if (e.button & 4) { b = 2 }
+  }
+  if (mac && e.ctrlKey && b == 1) { b = 3 }
+  return b
+}
+
+// Detect drag-and-drop
+var dragAndDrop = function() {
+  // There is *some* kind of drag-and-drop support in IE6-8, but I
+  // couldn't get it to work yet.
+  if (ie && ie_version < 9) { return false }
+  var div = elt('div')
+  return "draggable" in div || "dragDrop" in div
+}()
+
+var zwspSupported
+function zeroWidthElement(measure) {
+  if (zwspSupported == null) {
+    var test = elt("span", "\u200b")
+    removeChildrenAndAdd(measure, elt("span", [test, document.createTextNode("x")]))
+    if (measure.firstChild.offsetHeight != 0)
+      { zwspSupported = test.offsetWidth <= 1 && test.offsetHeight > 2 && !(ie && ie_version < 8) }
+  }
+  var node = zwspSupported ? elt("span", "\u200b") :
+    elt("span", "\u00a0", null, "display: inline-block; width: 1px; margin-right: -1px")
+  node.setAttribute("cm-text", "")
+  return node
+}
+
+// Feature-detect IE's crummy client rect reporting for bidi text
+var badBidiRects
+function hasBadBidiRects(measure) {
+  if (badBidiRects != null) { return badBidiRects }
+  var txt = removeChildrenAndAdd(measure, document.createTextNode("A\u062eA"))
+  var r0 = range(txt, 0, 1).getBoundingClientRect()
+  var r1 = range(txt, 1, 2).getBoundingClientRect()
+  removeChildren(measure)
+  if (!r0 || r0.left == r0.right) { return false } // Safari returns null in some cases (#2780)
+  return badBidiRects = (r1.right - r0.right < 3)
+}
+
+// See if "".split is the broken IE version, if so, provide an
+// alternative way to split lines.
+var splitLinesAuto = "\n\nb".split(/\n/).length != 3 ? function (string) {
+  var pos = 0, result = [], l = string.length
+  while (pos <= l) {
+    var nl = string.indexOf("\n", pos)
+    if (nl == -1) { nl = string.length }
+    var line = string.slice(pos, string.charAt(nl - 1) == "\r" ? nl - 1 : nl)
+    var rt = line.indexOf("\r")
+    if (rt != -1) {
+      result.push(line.slice(0, rt))
+      pos += rt + 1
+    } else {
+      result.push(line)
+      pos = nl + 1
+    }
+  }
+  return result
+} : function (string) { return string.split(/\r\n?|\n/); }
+
+var hasSelection = window.getSelection ? function (te) {
+  try { return te.selectionStart != te.selectionEnd }
+  catch(e) { return false }
+} : function (te) {
+  var range
+  try {range = te.ownerDocument.selection.createRange()}
+  catch(e) {}
+  if (!range || range.parentElement() != te) { return false }
+  return range.compareEndPoints("StartToEnd", range) != 0
+}
+
+var hasCopyEvent = (function () {
+  var e = elt("div")
+  if ("oncopy" in e) { return true }
+  e.setAttribute("oncopy", "return;")
+  return typeof e.oncopy == "function"
+})()
+
+var badZoomedRects = null
+function hasBadZoomedRects(measure) {
+  if (badZoomedRects != null) { return badZoomedRects }
+  var node = removeChildrenAndAdd(measure, elt("span", "x"))
+  var normal = node.getBoundingClientRect()
+  var fromRange = range(node, 0, 1).getBoundingClientRect()
+  return badZoomedRects = Math.abs(normal.left - fromRange.left) > 1
+}
+
+var modes = {};
+var mimeModes = {};
+// Extra arguments are stored as the mode's dependencies, which is
+// used by (legacy) mechanisms like loadmode.js to automatically
+// load a mode. (Preferred mechanism is the require/define calls.)
+function defineMode(name, mode) {
+  if (arguments.length > 2)
+    { mode.dependencies = Array.prototype.slice.call(arguments, 2) }
+  modes[name] = mode
+}
+
+function defineMIME(mime, spec) {
+  mimeModes[mime] = spec
+}
+
+// Given a MIME type, a {name, ...options} config object, or a name
+// string, return a mode config object.
+function resolveMode(spec) {
+  if (typeof spec == "string" && mimeModes.hasOwnProperty(spec)) {
+    spec = mimeModes[spec]
+  } else if (spec && typeof spec.name == "string" && mimeModes.hasOwnProperty(spec.name)) {
+    var found = mimeModes[spec.name]
+    if (typeof found == "string") { found = {name: found} }
+    spec = createObj(found, spec)
+    spec.name = found.name
+  } else if (typeof spec == "string" && /^[\w\-]+\/[\w\-]+\+xml$/.test(spec)) {
+    return resolveMode("application/xml")
+  } else if (typeof spec == "string" && /^[\w\-]+\/[\w\-]+\+json$/.test(spec)) {
+    return resolveMode("application/json")
+  }
+  if (typeof spec == "string") { return {name: spec} }
+  else { return spec || {name: "null"} }
+}
+
+// Given a mode spec (anything that resolveMode accepts), find and
+// initialize an actual mode object.
+function getMode(options, spec) {
+  spec = resolveMode(spec)
+  var mfactory = modes[spec.name]
+  if (!mfactory) { return getMode(options, "text/plain") }
+  var modeObj = mfactory(options, spec)
+  if (modeExtensions.hasOwnProperty(spec.name)) {
+    var exts = modeExtensions[spec.name]
+    for (var prop in exts) {
+      if (!exts.hasOwnProperty(prop)) { continue }
+      if (modeObj.hasOwnProperty(prop)) { modeObj["_" + prop] = modeObj[prop] }
+      modeObj[prop] = exts[prop]
+    }
+  }
+  modeObj.name = spec.name
+  if (spec.helperType) { modeObj.helperType = spec.helperType }
+  if (spec.modeProps) { for (var prop$1 in spec.modeProps)
+    { modeObj[prop$1] = spec.modeProps[prop$1] } }
+
+  return modeObj
+}
+
+// This can be used to attach properties to mode objects from
+// outside the actual mode definition.
+var modeExtensions = {}
+function extendMode(mode, properties) {
+  var exts = modeExtensions.hasOwnProperty(mode) ? modeExtensions[mode] : (modeExtensions[mode] = {})
+  copyObj(properties, exts)
+}
+
+function copyState(mode, state) {
+  if (state === true) { return state }
+  if (mode.copyState) { return mode.copyState(state) }
+  var nstate = {}
+  for (var n in state) {
+    var val = state[n]
+    if (val instanceof Array) { val = val.concat([]) }
+    nstate[n] = val
+  }
+  return nstate
+}
+
+// Given a mode and a state (for that mode), find the inner mode and
+// state at the position that the state refers to.
+function innerMode(mode, state) {
+  var info
+  while (mode.innerMode) {
+    info = mode.innerMode(state)
+    if (!info || info.mode == mode) { break }
+    state = info.state
+    mode = info.mode
+  }
+  return info || {mode: mode, state: state}
+}
+
+function startState(mode, a1, a2) {
+  return mode.startState ? mode.startState(a1, a2) : true
+}
+
+// STRING STREAM
+
+// Fed to the mode parsers, provides helper functions to make
+// parsers more succinct.
+
+var StringStream = function(string, tabSize, lineOracle) {
+  this.pos = this.start = 0
+  this.string = string
+  this.tabSize = tabSize || 8
+  this.lastColumnPos = this.lastColumnValue = 0
+  this.lineStart = 0
+  this.lineOracle = lineOracle
+};
+
+StringStream.prototype.eol = function () {return this.pos >= this.string.length};
+StringStream.prototype.sol = function () {return this.pos == this.lineStart};
+StringStream.prototype.peek = function () {return this.string.charAt(this.pos) || undefined};
+StringStream.prototype.next = function () {
+  if (this.pos < this.string.length)
+    { return this.string.charAt(this.pos++) }
+};
+StringStream.prototype.eat = function (match) {
+  var ch = this.string.charAt(this.pos)
+  var ok
+  if (typeof match == "string") { ok = ch == match }
+  else { ok = ch && (match.test ? match.test(ch) : match(ch)) }
+  if (ok) {++this.pos; return ch}
+};
+StringStream.prototype.eatWhile = function (match) {
+  var start = this.pos
+  while (this.eat(match)){}
+  return this.pos > start
+};
+StringStream.prototype.eatSpace = function () {
+    var this$1 = this;
+
+  var start = this.pos
+  while (/[\s\u00a0]/.test(this.string.charAt(this.pos))) { ++this$1.pos }
+  return this.pos > start
+};
+StringStream.prototype.skipToEnd = function () {this.pos = this.string.length};
+StringStream.prototype.skipTo = function (ch) {
+  var found = this.string.indexOf(ch, this.pos)
+  if (found > -1) {this.pos = found; return true}
+};
+StringStream.prototype.backUp = function (n) {this.pos -= n};
+StringStream.prototype.column = function () {
+  if (this.lastColumnPos < this.start) {
+    this.lastColumnValue = countColumn(this.string, this.start, this.tabSize, this.lastColumnPos, this.lastColumnValue)
+    this.lastColumnPos = this.start
+  }
+  return this.lastColumnValue - (this.lineStart ? countColumn(this.string, this.lineStart, this.tabSize) : 0)
+};
+StringStream.prototype.indentation = function () {
+  return countColumn(this.string, null, this.tabSize) -
+    (this.lineStart ? countColumn(this.string, this.lineStart, this.tabSize) : 0)
+};
+StringStream.prototype.match = function (pattern, consume, caseInsensitive) {
+  if (typeof pattern == "string") {
+    var cased = function (str) { return caseInsensitive ? str.toLowerCase() : str; }
+    var substr = this.string.substr(this.pos, pattern.length)
+    if (cased(substr) == cased(pattern)) {
+      if (consume !== false) { this.pos += pattern.length }
+      return true
+    }
+  } else {
+    var match = this.string.slice(this.pos).match(pattern)
+    if (match && match.index > 0) { return null }
+    if (match && consume !== false) { this.pos += match[0].length }
+    return match
+  }
+};
+StringStream.prototype.current = function (){return this.string.slice(this.start, this.pos)};
+StringStream.prototype.hideFirstChars = function (n, inner) {
+  this.lineStart += n
+  try { return inner() }
+  finally { this.lineStart -= n }
+};
+StringStream.prototype.lookAhead = function (n) {
+  var oracle = this.lineOracle
+  return oracle && oracle.lookAhead(n)
+};
+
+var SavedContext = function(state, lookAhead) {
+  this.state = state
+  this.lookAhead = lookAhead
+};
+
+var Context = function(doc, state, line, lookAhead) {
+  this.state = state
+  this.doc = doc
+  this.line = line
+  this.maxLookAhead = lookAhead || 0
+};
+
+Context.prototype.lookAhead = function (n) {
+  var line = this.doc.getLine(this.line + n)
+  if (line != null && n > this.maxLookAhead) { this.maxLookAhead = n }
+  return line
+};
+
+Context.prototype.nextLine = function () {
+  this.line++
+  if (this.maxLookAhead > 0) { this.maxLookAhead-- }
+};
+
+Context.fromSaved = function (doc, saved, line) {
+  if (saved instanceof SavedContext)
+    { return new Context(doc, copyState(doc.mode, saved.state), line, saved.lookAhead) }
+  else
+    { return new Context(doc, copyState(doc.mode, saved), line) }
+};
+
+Context.prototype.save = function (copy) {
+  var state = copy !== false ? copyState(this.doc.mode, this.state) : this.state
+  return this.maxLookAhead > 0 ? new SavedContext(state, this.maxLookAhead) : state
+};
+
+
+// Compute a style array (an array starting with a mode generation
+// -- for invalidation -- followed by pairs of end positions and
+// style strings), which is used to highlight the tokens on the
+// line.
+function highlightLine(cm, line, context, forceToEnd) {
+  // A styles array always starts with a number identifying the
+  // mode/overlays that it is based on (for easy invalidation).
+  var st = [cm.state.modeGen], lineClasses = {}
+  // Compute the base array of styles
+  runMode(cm, line.text, cm.doc.mode, context, function (end, style) { return st.push(end, style); },
+          lineClasses, forceToEnd)
+  var state = context.state
+
+  // Run overlays, adjust style array.
+  var loop = function ( o ) {
+    var overlay = cm.state.overlays[o], i = 1, at = 0
+    context.state = true
+    runMode(cm, line.text, overlay.mode, context, function (end, style) {
+      var start = i
+      // Ensure there's a token end at the current position, and that i points at it
+      while (at < end) {
+        var i_end = st[i]
+        if (i_end > end)
+          { st.splice(i, 1, end, st[i+1], i_end) }
+        i += 2
+        at = Math.min(end, i_end)
+      }
+      if (!style) { return }
+      if (overlay.opaque) {
+        st.splice(start, i - start, end, "overlay " + style)
+        i = start + 2
+      } else {
+        for (; start < i; start += 2) {
+          var cur = st[start+1]
+          st[start+1] = (cur ? cur + " " : "") + "overlay " + style
+        }
+      }
+    }, lineClasses)
+  };
+
+  for (var o = 0; o < cm.state.overlays.length; ++o) loop( o );
+  context.state = state
+
+  return {styles: st, classes: lineClasses.bgClass || lineClasses.textClass ? lineClasses : null}
+}
+
+function getLineStyles(cm, line, updateFrontier) {
+  if (!line.styles || line.styles[0] != cm.state.modeGen) {
+    var context = getContextBefore(cm, lineNo(line))
+    var resetState = line.text.length > cm.options.maxHighlightLength && copyState(cm.doc.mode, context.state)
+    var result = highlightLine(cm, line, context)
+    if (resetState) { context.state = resetState }
+    line.stateAfter = context.save(!resetState)
+    line.styles = result.styles
+    if (result.classes) { line.styleClasses = result.classes }
+    else if (line.styleClasses) { line.styleClasses = null }
+    if (updateFrontier === cm.doc.highlightFrontier)
+      { cm.doc.modeFrontier = Math.max(cm.doc.modeFrontier, ++cm.doc.highlightFrontier) }
+  }
+  return line.styles
+}
+
+function getContextBefore(cm, n, precise) {
+  var doc = cm.doc, display = cm.display
+  if (!doc.mode.startState) { return new Context(doc, true, n) }
+  var start = findStartLine(cm, n, precise)
+  var saved = start > doc.first && getLine(doc, start - 1).stateAfter
+  var context = saved ? Context.fromSaved(doc, saved, start) : new Context(doc, startState(doc.mode), start)
+
+  doc.iter(start, n, function (line) {
+    processLine(cm, line.text, context)
+    var pos = context.line
+    line.stateAfter = pos == n - 1 || pos % 5 == 0 || pos >= display.viewFrom && pos < display.viewTo ? context.save() : null
+    context.nextLine()
+  })
+  if (precise) { doc.modeFrontier = context.line }
+  return context
+}
+
+// Lightweight form of highlight -- proceed over this line and
+// update state, but don't save a style array. Used for lines that
+// aren't currently visible.
+function processLine(cm, text, context, startAt) {
+  var mode = cm.doc.mode
+  var stream = new StringStream(text, cm.options.tabSize, context)
+  stream.start = stream.pos = startAt || 0
+  if (text == "") { callBlankLine(mode, context.state) }
+  while (!stream.eol()) {
+    readToken(mode, stream, context.state)
+    stream.start = stream.pos
+  }
+}
+
+function callBlankLine(mode, state) {
+  if (mode.blankLine) { return mode.blankLine(state) }
+  if (!mode.innerMode) { return }
+  var inner = innerMode(mode, state)
+  if (inner.mode.blankLine) { return inner.mode.blankLine(inner.state) }
+}
+
+function readToken(mode, stream, state, inner) {
+  for (var i = 0; i < 10; i++) {
+    if (inner) { inner[0] = innerMode(mode, state).mode }
+    var style = mode.token(stream, state)
+    if (stream.pos > stream.start) { return style }
+  }
+  throw new Error("Mode " + mode.name + " failed to advance stream.")
+}
+
+var Token = function(stream, type, state) {
+  this.start = stream.start; this.end = stream.pos
+  this.string = stream.current()
+  this.type = type || null
+  this.state = state
+};
+
+// Utility for getTokenAt and getLineTokens
+function takeToken(cm, pos, precise, asArray) {
+  var doc = cm.doc, mode = doc.mode, style
+  pos = clipPos(doc, pos)
+  var line = getLine(doc, pos.line), context = getContextBefore(cm, pos.line, precise)
+  var stream = new StringStream(line.text, cm.options.tabSize, context), tokens
+  if (asArray) { tokens = [] }
+  while ((asArray || stream.pos < pos.ch) && !stream.eol()) {
+    stream.start = stream.pos
+    style = readToken(mode, stream, context.state)
+    if (asArray) { tokens.push(new Token(stream, style, copyState(doc.mode, context.state))) }
+  }
+  return asArray ? tokens : new Token(stream, style, context.state)
+}
+
+function extractLineClasses(type, output) {
+  if (type) { for (;;) {
+    var lineClass = type.match(/(?:^|\s+)line-(background-)?(\S+)/)
+    if (!lineClass) { break }
+    type = type.slice(0, lineClass.index) + type.slice(lineClass.index + lineClass[0].length)
+    var prop = lineClass[1] ? "bgClass" : "textClass"
+    if (output[prop] == null)
+      { output[prop] = lineClass[2] }
+    else if (!(new RegExp("(?:^|\s)" + lineClass[2] + "(?:$|\s)")).test(output[prop]))
+      { output[prop] += " " + lineClass[2] }
+  } }
+  return type
+}
+
+// Run the given mode's parser over a line, calling f for each token.
+function runMode(cm, text, mode, context, f, lineClasses, forceToEnd) {
+  var flattenSpans = mode.flattenSpans
+  if (flattenSpans == null) { flattenSpans = cm.options.flattenSpans }
+  var curStart = 0, curStyle = null
+  var stream = new StringStream(text, cm.options.tabSize, context), style
+  var inner = cm.options.addModeClass && [null]
+  if (text == "") { extractLineClasses(callBlankLine(mode, context.state), lineClasses) }
+  while (!stream.eol()) {
+    if (stream.pos > cm.options.maxHighlightLength) {
+      flattenSpans = false
+      if (forceToEnd) { processLine(cm, text, context, stream.pos) }
+      stream.pos = text.length
+      style = null
+    } else {
+      style = extractLineClasses(readToken(mode, stream, context.state, inner), lineClasses)
+    }
+    if (inner) {
+      var mName = inner[0].name
+      if (mName) { style = "m-" + (style ? mName + " " + style : mName) }
+    }
+    if (!flattenSpans || curStyle != style) {
+      while (curStart < stream.start) {
+        curStart = Math.min(stream.start, curStart + 5000)
+        f(curStart, curStyle)
+      }
+      curStyle = style
+    }
+    stream.start = stream.pos
+  }
+  while (curStart < stream.pos) {
+    // Webkit seems to refuse to render text nodes longer than 57444
+    // characters, and returns inaccurate measurements in nodes
+    // starting around 5000 chars.
+    var pos = Math.min(stream.pos, curStart + 5000)
+    f(pos, curStyle)
+    curStart = pos
+  }
+}
+
+// Finds the line to start with when starting a parse. Tries to
+// find a line with a stateAfter, so that it can start with a
+// valid state. If that fails, it returns the line with the
+// smallest indentation, which tends to need the least context to
+// parse correctly.
+function findStartLine(cm, n, precise) {
+  var minindent, minline, doc = cm.doc
+  var lim = precise ? -1 : n - (cm.doc.mode.innerMode ? 1000 : 100)
+  for (var search = n; search > lim; --search) {
+    if (search <= doc.first) { return doc.first }
+    var line = getLine(doc, search - 1), after = line.stateAfter
+    if (after && (!precise || search + (after instanceof SavedContext ? after.lookAhead : 0) <= doc.modeFrontier))
+      { return search }
+    var indented = countColumn(line.text, null, cm.options.tabSize)
+    if (minline == null || minindent > indented) {
+      minline = search - 1
+      minindent = indented
+    }
+  }
+  return minline
+}
+
+function retreatFrontier(doc, n) {
+  doc.modeFrontier = Math.min(doc.modeFrontier, n)
+  if (doc.highlightFrontier < n - 10) { return }
+  var start = doc.first
+  for (var line = n - 1; line > start; line--) {
+    var saved = getLine(doc, line).stateAfter
+    // change is on 3
+    // state on line 1 looked ahead 2 -- so saw 3
+    // test 1 + 2 < 3 should cover this
+    if (saved && (!(saved instanceof SavedContext) || line + saved.lookAhead < n)) {
+      start = line + 1
+      break
+    }
+  }
+  doc.highlightFrontier = Math.min(doc.highlightFrontier, start)
+}
+
+// LINE DATA STRUCTURE
+
+// Line objects. These hold state related to a line, including
+// highlighting info (the styles array).
+var Line = function(text, markedSpans, estimateHeight) {
+  this.text = text
+  attachMarkedSpans(this, markedSpans)
+  this.height = estimateHeight ? estimateHeight(this) : 1
+};
+
+Line.prototype.lineNo = function () { return lineNo(this) };
+eventMixin(Line)
+
+// Change the content (text, markers) of a line. Automatically
+// invalidates cached information and tries to re-estimate the
+// line's height.
+function updateLine(line, text, markedSpans, estimateHeight) {
+  line.text = text
+  if (line.stateAfter) { line.stateAfter = null }
+  if (line.styles) { line.styles = null }
+  if (line.order != null) { line.order = null }
+  detachMarkedSpans(line)
+  attachMarkedSpans(line, markedSpans)
+  var estHeight = estimateHeight ? estimateHeight(line) : 1
+  if (estHeight != line.height) { updateLineHeight(line, estHeight) }
+}
+
+// Detach a line from the document tree and its markers.
+function cleanUpLine(line) {
+  line.parent = null
+  detachMarkedSpans(line)
+}
+
+// Convert a style as returned by a mode (either null, or a string
+// containing one or more styles) to a CSS style. This is cached,
+// and also looks for line-wide styles.
+var styleToClassCache = {};
+var styleToClassCacheWithMode = {};
+function interpretTokenStyle(style, options) {
+  if (!style || /^\s*$/.test(style)) { return null }
+  var cache = options.addModeClass ? styleToClassCacheWithMode : styleToClassCache
+  return cache[style] ||
+    (cache[style] = style.replace(/\S+/g, "cm-$&"))
+}
+
+// Render the DOM representation of the text of a line. Also builds
+// up a 'line map', which points at the DOM nodes that represent
+// specific stretches of text, and is used by the measuring code.
+// The returned object contains the DOM node, this map, and
+// information about line-wide styles that were set by the mode.
+function buildLineContent(cm, lineView) {
+  // The padding-right forces the element to have a 'border', which
+  // is needed on Webkit to be able to get line-level bounding
+  // rectangles for it (in measureChar).
+  var content = eltP("span", null, null, webkit ? "padding-right: .1px" : null)
+  var builder = {pre: eltP("pre", [content], "CodeMirror-line"), content: content,
+                 col: 0, pos: 0, cm: cm,
+                 trailingSpace: false,
+                 splitSpaces: (ie || webkit) && cm.getOption("lineWrapping")}
+  lineView.measure = {}
+
+  // Iterate over the logical lines that make up this visual line.
+  for (var i = 0; i <= (lineView.rest ? lineView.rest.length : 0); i++) {
+    var line = i ? lineView.rest[i - 1] : lineView.line, order = (void 0)
+    builder.pos = 0
+    builder.addToken = buildToken
+    // Optionally wire in some hacks into the token-rendering
+    // algorithm, to deal with browser quirks.
+    if (hasBadBidiRects(cm.display.measure) && (order = getOrder(line, cm.doc.direction)))
+      { builder.addToken = buildTokenBadBidi(builder.addToken, order) }
+    builder.map = []
+    var allowFrontierUpdate = lineView != cm.display.externalMeasured && lineNo(line)
+    insertLineContent(line, builder, getLineStyles(cm, line, allowFrontierUpdate))
+    if (line.styleClasses) {
+      if (line.styleClasses.bgClass)
+        { builder.bgClass = joinClasses(line.styleClasses.bgClass, builder.bgClass || "") }
+      if (line.styleClasses.textClass)
+        { builder.textClass = joinClasses(line.styleClasses.textClass, builder.textClass || "") }
+    }
+
+    // Ensure at least a single node is present, for measuring.
+    if (builder.map.length == 0)
+      { builder.map.push(0, 0, builder.content.appendChild(zeroWidthElement(cm.display.measure))) }
+
+    // Store the map and a cache object for the current logical line
+    if (i == 0) {
+      lineView.measure.map = builder.map
+      lineView.measure.cache = {}
+    } else {
+      ;(lineView.measure.maps || (lineView.measure.maps = [])).push(builder.map)
+      ;(lineView.measure.caches || (lineView.measure.caches = [])).push({})
+    }
+  }
+
+  // See issue #2901
+  if (webkit) {
+    var last = builder.content.lastChild
+    if (/\bcm-tab\b/.test(last.className) || (last.querySelector && last.querySelector(".cm-tab")))
+      { builder.content.className = "cm-tab-wrap-hack" }
+  }
+
+  signal(cm, "renderLine", cm, lineView.line, builder.pre)
+  if (builder.pre.className)
+    { builder.textClass = joinClasses(builder.pre.className, builder.textClass || "") }
+
+  return builder
+}
+
+function defaultSpecialCharPlaceholder(ch) {
+  var token = elt("span", "\u2022", "cm-invalidchar")
+  token.title = "\\u" + ch.charCodeAt(0).toString(16)
+  token.setAttribute("aria-label", token.title)
+  return token
+}
+
+// Build up the DOM representation for a single token, and add it to
+// the line map. Takes care to render special characters separately.
+function buildToken(builder, text, style, startStyle, endStyle, title, css) {
+  if (!text) { return }
+  var displayText = builder.splitSpaces ? splitSpaces(text, builder.trailingSpace) : text
+  var special = builder.cm.state.specialChars, mustWrap = false
+  var content
+  if (!special.test(text)) {
+    builder.col += text.length
+    content = document.createTextNode(displayText)
+    builder.map.push(builder.pos, builder.pos + text.length, content)
+    if (ie && ie_version < 9) { mustWrap = true }
+    builder.pos += text.length
+  } else {
+    content = document.createDocumentFragment()
+    var pos = 0
+    while (true) {
+      special.lastIndex = pos
+      var m = special.exec(text)
+      var skipped = m ? m.index - pos : text.length - pos
+      if (skipped) {
+        var txt = document.createTextNode(displayText.slice(pos, pos + skipped))
+        if (ie && ie_version < 9) { content.appendChild(elt("span", [txt])) }
+        else { content.appendChild(txt) }
+        builder.map.push(builder.pos, builder.pos + skipped, txt)
+        builder.col += skipped
+        builder.pos += skipped
+      }
+      if (!m) { break }
+      pos += skipped + 1
+      var txt$1 = (void 0)
+      if (m[0] == "\t") {
+        var tabSize = builder.cm.options.tabSize, tabWidth = tabSize - builder.col % tabSize
+        txt$1 = content.appendChild(elt("span", spaceStr(tabWidth), "cm-tab"))
+        txt$1.setAttribute("role", "presentation")
+        txt$1.setAttribute("cm-text", "\t")
+        builder.col += tabWidth
+      } else if (m[0] == "\r" || m[0] == "\n") {
+        txt$1 = content.appendChild(elt("span", m[0] == "\r" ? "\u240d" : "\u2424", "cm-invalidchar"))
+        txt$1.setAttribute("cm-text", m[0])
+        builder.col += 1
+      } else {
+        txt$1 = builder.cm.options.specialCharPlaceholder(m[0])
+        txt$1.setAttribute("cm-text", m[0])
+        if (ie && ie_version < 9) { content.appendChild(elt("span", [txt$1])) }
+        else { content.appendChild(txt$1) }
+        builder.col += 1
+      }
+      builder.map.push(builder.pos, builder.pos + 1, txt$1)
+      builder.pos++
+    }
+  }
+  builder.trailingSpace = displayText.charCodeAt(text.length - 1) == 32
+  if (style || startStyle || endStyle || mustWrap || css) {
+    var fullStyle = style || ""
+    if (startStyle) { fullStyle += startStyle }
+    if (endStyle) { fullStyle += endStyle }
+    var token = elt("span", [content], fullStyle, css)
+    if (title) { token.title = title }
+    return builder.content.appendChild(token)
+  }
+  builder.content.appendChild(content)
+}
+
+function splitSpaces(text, trailingBefore) {
+  if (text.length > 1 && !/  /.test(text)) { return text }
+  var spaceBefore = trailingBefore, result = ""
+  for (var i = 0; i < text.length; i++) {
+    var ch = text.charAt(i)
+    if (ch == " " && spaceBefore && (i == text.length - 1 || text.charCodeAt(i + 1) == 32))
+      { ch = "\u00a0" }
+    result += ch
+    spaceBefore = ch == " "
+  }
+  return result
+}
+
+// Work around nonsense dimensions being reported for stretches of
+// right-to-left text.
+function buildTokenBadBidi(inner, order) {
+  return function (builder, text, style, startStyle, endStyle, title, css) {
+    style = style ? style + " cm-force-border" : "cm-force-border"
+    var start = builder.pos, end = start + text.length
+    for (;;) {
+      // Find the part that overlaps with the start of this text
+      var part = (void 0)
+      for (var i = 0; i < order.length; i++) {
+        part = order[i]
+        if (part.to > start && part.from <= start) { break }
+      }
+      if (part.to >= end) { return inner(builder, text, style, startStyle, endStyle, title, css) }
+      inner(builder, text.slice(0, part.to - start), style, startStyle, null, title, css)
+      startStyle = null
+      text = text.slice(part.to - start)
+      start = part.to
+    }
+  }
+}
+
+function buildCollapsedSpan(builder, size, marker, ignoreWidget) {
+  var widget = !ignoreWidget && marker.widgetNode
+  if (widget) { builder.map.push(builder.pos, builder.pos + size, widget) }
+  if (!ignoreWidget && builder.cm.display.input.needsContentAttribute) {
+    if (!widget)
+      { widget = builder.content.appendChild(document.createElement("span")) }
+    widget.setAttribute("cm-marker", marker.id)
+  }
+  if (widget) {
+    builder.cm.display.input.setUneditable(widget)
+    builder.content.appendChild(widget)
+  }
+  builder.pos += size
+  builder.trailingSpace = false
+}
+
+// Outputs a number of spans to make up a line, taking highlighting
+// and marked text into account.
+function insertLineContent(line, builder, styles) {
+  var spans = line.markedSpans, allText = line.text, at = 0
+  if (!spans) {
+    for (var i$1 = 1; i$1 < styles.length; i$1+=2)
+      { builder.addToken(builder, allText.slice(at, at = styles[i$1]), interpretTokenStyle(styles[i$1+1], builder.cm.options)) }
+    return
+  }
+
+  var len = allText.length, pos = 0, i = 1, text = "", style, css
+  var nextChange = 0, spanStyle, spanEndStyle, spanStartStyle, title, collapsed
+  for (;;) {
+    if (nextChange == pos) { // Update current marker set
+      spanStyle = spanEndStyle = spanStartStyle = title = css = ""
+      collapsed = null; nextChange = Infinity
+      var foundBookmarks = [], endStyles = (void 0)
+      for (var j = 0; j < spans.length; ++j) {
+        var sp = spans[j], m = sp.marker
+        if (m.type == "bookmark" && sp.from == pos && m.widgetNode) {
+          foundBookmarks.push(m)
+        } else if (sp.from <= pos && (sp.to == null || sp.to > pos || m.collapsed && sp.to == pos && sp.from == pos)) {
+          if (sp.to != null && sp.to != pos && nextChange > sp.to) {
+            nextChange = sp.to
+            spanEndStyle = ""
+          }
+          if (m.className) { spanStyle += " " + m.className }
+          if (m.css) { css = (css ? css + ";" : "") + m.css }
+          if (m.startStyle && sp.from == pos) { spanStartStyle += " " + m.startStyle }
+          if (m.endStyle && sp.to == nextChange) { (endStyles || (endStyles = [])).push(m.endStyle, sp.to) }
+          if (m.title && !title) { title = m.title }
+          if (m.collapsed && (!collapsed || compareCollapsedMarkers(collapsed.marker, m) < 0))
+            { collapsed = sp }
+        } else if (sp.from > pos && nextChange > sp.from) {
+          nextChange = sp.from
+        }
+      }
+      if (endStyles) { for (var j$1 = 0; j$1 < endStyles.length; j$1 += 2)
+        { if (endStyles[j$1 + 1] == nextChange) { spanEndStyle += " " + endStyles[j$1] } } }
+
+      if (!collapsed || collapsed.from == pos) { for (var j$2 = 0; j$2 < foundBookmarks.length; ++j$2)
+        { buildCollapsedSpan(builder, 0, foundBookmarks[j$2]) } }
+      if (collapsed && (collapsed.from || 0) == pos) {
+        buildCollapsedSpan(builder, (collapsed.to == null ? len + 1 : collapsed.to) - pos,
+                           collapsed.marker, collapsed.from == null)
+        if (collapsed.to == null) { return }
+        if (collapsed.to == pos) { collapsed = false }
+      }
+    }
+    if (pos >= len) { break }
+
+    var upto = Math.min(len, nextChange)
+    while (true) {
+      if (text) {
+        var end = pos + text.length
+        if (!collapsed) {
+          var tokenText = end > upto ? text.slice(0, upto - pos) : text
+          builder.addToken(builder, tokenText, style ? style + spanStyle : spanStyle,
+                           spanStartStyle, pos + tokenText.length == nextChange ? spanEndStyle : "", title, css)
+        }
+        if (end >= upto) {text = text.slice(upto - pos); pos = upto; break}
+        pos = end
+        spanStartStyle = ""
+      }
+      text = allText.slice(at, at = styles[i++])
+      style = interpretTokenStyle(styles[i++], builder.cm.options)
+    }
+  }
+}
+
+
+// These objects are used to represent the visible (currently drawn)
+// part of the document. A LineView may correspond to multiple
+// logical lines, if those are connected by collapsed ranges.
+function LineView(doc, line, lineN) {
+  // The starting line
+  this.line = line
+  // Continuing lines, if any
+  this.rest = visualLineContinued(line)
+  // Number of logical lines in this visual line
+  this.size = this.rest ? lineNo(lst(this.rest)) - lineN + 1 : 1
+  this.node = this.text = null
+  this.hidden = lineIsHidden(doc, line)
+}
+
+// Create a range of LineView objects for the given lines.
+function buildViewArray(cm, from, to) {
+  var array = [], nextPos
+  for (var pos = from; pos < to; pos = nextPos) {
+    var view = new LineView(cm.doc, getLine(cm.doc, pos), pos)
+    nextPos = pos + view.size
+    array.push(view)
+  }
+  return array
+}
+
+var operationGroup = null
+
+function pushOperation(op) {
+  if (operationGroup) {
+    operationGroup.ops.push(op)
+  } else {
+    op.ownsGroup = operationGroup = {
+      ops: [op],
+      delayedCallbacks: []
+    }
+  }
+}
+
+function fireCallbacksForOps(group) {
+  // Calls delayed callbacks and cursorActivity handlers until no
+  // new ones appear
+  var callbacks = group.delayedCallbacks, i = 0
+  do {
+    for (; i < callbacks.length; i++)
+      { callbacks[i].call(null) }
+    for (var j = 0; j < group.ops.length; j++) {
+      var op = group.ops[j]
+      if (op.cursorActivityHandlers)
+        { while (op.cursorActivityCalled < op.cursorActivityHandlers.length)
+          { op.cursorActivityHandlers[op.cursorActivityCalled++].call(null, op.cm) } }
+    }
+  } while (i < callbacks.length)
+}
+
+function finishOperation(op, endCb) {
+  var group = op.ownsGroup
+  if (!group) { return }
+
+  try { fireCallbacksForOps(group) }
+  finally {
+    operationGroup = null
+    endCb(group)
+  }
+}
+
+var orphanDelayedCallbacks = null
+
+// Often, we want to signal events at a point where we are in the
+// middle of some work, but don't want the handler to start calling
+// other methods on the editor, which might be in an inconsistent
+// state or simply not expect any other events to happen.
+// signalLater looks whether there are any handlers, and schedules
+// them to be executed when the last operation ends, or, if no
+// operation is active, when a timeout fires.
+function signalLater(emitter, type /*, values...*/) {
+  var arr = getHandlers(emitter, type)
+  if (!arr.length) { return }
+  var args = Array.prototype.slice.call(arguments, 2), list
+  if (operationGroup) {
+    list = operationGroup.delayedCallbacks
+  } else if (orphanDelayedCallbacks) {
+    list = orphanDelayedCallbacks
+  } else {
+    list = orphanDelayedCallbacks = []
+    setTimeout(fireOrphanDelayed, 0)
+  }
+  var loop = function ( i ) {
+    list.push(function () { return arr[i].apply(null, args); })
+  };
+
+  for (var i = 0; i < arr.length; ++i)
+    loop( i );
+}
+
+function fireOrphanDelayed() {
+  var delayed = orphanDelayedCallbacks
+  orphanDelayedCallbacks = null
+  for (var i = 0; i < delayed.length; ++i) { delayed[i]() }
+}
+
+// When an aspect of a line changes, a string is added to
+// lineView.changes. This updates the relevant part of the line's
+// DOM structure.
+function updateLineForChanges(cm, lineView, lineN, dims) {
+  for (var j = 0; j < lineView.changes.length; j++) {
+    var type = lineView.changes[j]
+    if (type == "text") { updateLineText(cm, lineView) }
+    else if (type == "gutter") { updateLineGutter(cm, lineView, lineN, dims) }
+    else if (type == "class") { updateLineClasses(cm, lineView) }
+    else if (type == "widget") { updateLineWidgets(cm, lineView, dims) }
+  }
+  lineView.changes = null
+}
+
+// Lines with gutter elements, widgets or a background class need to
+// be wrapped, and have the extra elements added to the wrapper div
+function ensureLineWrapped(lineView) {
+  if (lineView.node == lineView.text) {
+    lineView.node = elt("div", null, null, "position: relative")
+    if (lineView.text.parentNode)
+      { lineView.text.parentNode.replaceChild(lineView.node, lineView.text) }
+    lineView.node.appendChild(lineView.text)
+    if (ie && ie_version < 8) { lineView.node.style.zIndex = 2 }
+  }
+  return lineView.node
+}
+
+function updateLineBackground(cm, lineView) {
+  var cls = lineView.bgClass ? lineView.bgClass + " " + (lineView.line.bgClass || "") : lineView.line.bgClass
+  if (cls) { cls += " CodeMirror-linebackground" }
+  if (lineView.background) {
+    if (cls) { lineView.background.className = cls }
+    else { lineView.background.parentNode.removeChild(lineView.background); lineView.background = null }
+  } else if (cls) {
+    var wrap = ensureLineWrapped(lineView)
+    lineView.background = wrap.insertBefore(elt("div", null, cls), wrap.firstChild)
+    cm.display.input.setUneditable(lineView.background)
+  }
+}
+
+// Wrapper around buildLineContent which will reuse the structure
+// in display.externalMeasured when possible.
+function getLineContent(cm, lineView) {
+  var ext = cm.display.externalMeasured
+  if (ext && ext.line == lineView.line) {
+    cm.display.externalMeasured = null
+    lineView.measure = ext.measure
+    return ext.built
+  }
+  return buildLineContent(cm, lineView)
+}
+
+// Redraw the line's text. Interacts with the background and text
+// classes because the mode may output tokens that influence these
+// classes.
+function updateLineText(cm, lineView) {
+  var cls = lineView.text.className
+  var built = getLineContent(cm, lineView)
+  if (lineView.text == lineView.node) { lineView.node = built.pre }
+  lineView.text.parentNode.replaceChild(built.pre, lineView.text)
+  lineView.text = built.pre
+  if (built.bgClass != lineView.bgClass || built.textClass != lineView.textClass) {
+    lineView.bgClass = built.bgClass
+    lineView.textClass = built.textClass
+    updateLineClasses(cm, lineView)
+  } else if (cls) {
+    lineView.text.className = cls
+  }
+}
+
+function updateLineClasses(cm, lineView) {
+  updateLineBackground(cm, lineView)
+  if (lineView.line.wrapClass)
+    { ensureLineWrapped(lineView).className = lineView.line.wrapClass }
+  else if (lineView.node != lineView.text)
+    { lineView.node.className = "" }
+  var textClass = lineView.textClass ? lineView.textClass + " " + (lineView.line.textClass || "") : lineView.line.textClass
+  lineView.text.className = textClass || ""
+}
+
+function updateLineGutter(cm, lineView, lineN, dims) {
+  if (lineView.gutter) {
+    lineView.node.removeChild(lineView.gutter)
+    lineView.gutter = null
+  }
+  if (lineView.gutterBackground) {
+    lineView.node.removeChild(lineView.gutterBackground)
+    lineView.gutterBackground = null
+  }
+  if (lineView.line.gutterClass) {
+    var wrap = ensureLineWrapped(lineView)
+    lineView.gutterBackground = elt("div", null, "CodeMirror-gutter-background " + lineView.line.gutterClass,
+                                    ("left: " + (cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth) + "px; width: " + (dims.gutterTotalWidth) + "px"))
+    cm.display.input.setUneditable(lineView.gutterBackground)
+    wrap.insertBefore(lineView.gutterBackground, lineView.text)
+  }
+  var markers = lineView.line.gutterMarkers
+  if (cm.options.lineNumbers || markers) {
+    var wrap$1 = ensureLineWrapped(lineView)
+    var gutterWrap = lineView.gutter = elt("div", null, "CodeMirror-gutter-wrapper", ("left: " + (cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth) + "px"))
+    cm.display.input.setUneditable(gutterWrap)
+    wrap$1.insertBefore(gutterWrap, lineView.text)
+    if (lineView.line.gutterClass)
+      { gutterWrap.className += " " + lineView.line.gutterClass }
+    if (cm.options.lineNumbers && (!markers || !markers["CodeMirror-linenumbers"]))
+      { lineView.lineNumber = gutterWrap.appendChild(
+        elt("div", lineNumberFor(cm.options, lineN),
+            "CodeMirror-linenumber CodeMirror-gutter-elt",
+            ("left: " + (dims.gutterLeft["CodeMirror-linenumbers"]) + "px; width: " + (cm.display.lineNumInnerWidth) + "px"))) }
+    if (markers) { for (var k = 0; k < cm.options.gutters.length; ++k) {
+      var id = cm.options.gutters[k], found = markers.hasOwnProperty(id) && markers[id]
+      if (found)
+        { gutterWrap.appendChild(elt("div", [found], "CodeMirror-gutter-elt",
+                                   ("left: " + (dims.gutterLeft[id]) + "px; width: " + (dims.gutterWidth[id]) + "px"))) }
+    } }
+  }
+}
+
+function updateLineWidgets(cm, lineView, dims) {
+  if (lineView.alignable) { lineView.alignable = null }
+  for (var node = lineView.node.firstChild, next = (void 0); node; node = next) {
+    next = node.nextSibling
+    if (node.className == "CodeMirror-linewidget")
+      { lineView.node.removeChild(node) }
+  }
+  insertLineWidgets(cm, lineView, dims)
+}
+
+// Build a line's DOM representation from scratch
+function buildLineElement(cm, lineView, lineN, dims) {
+  var built = getLineContent(cm, lineView)
+  lineView.text = lineView.node = built.pre
+  if (built.bgClass) { lineView.bgClass = built.bgClass }
+  if (built.textClass) { lineView.textClass = built.textClass }
+
+  updateLineClasses(cm, lineView)
+  updateLineGutter(cm, lineView, lineN, dims)
+  insertLineWidgets(cm, lineView, dims)
+  return lineView.node
+}
+
+// A lineView may contain multiple logical lines (when merged by
+// collapsed spans). The widgets for all of them need to be drawn.
+function insertLineWidgets(cm, lineView, dims) {
+  insertLineWidgetsFor(cm, lineView.line, lineView, dims, true)
+  if (lineView.rest) { for (var i = 0; i < lineView.rest.length; i++)
+    { insertLineWidgetsFor(cm, lineView.rest[i], lineView, dims, false) } }
+}
+
+function insertLineWidgetsFor(cm, line, lineView, dims, allowAbove) {
+  if (!line.widgets) { return }
+  var wrap = ensureLineWrapped(lineView)
+  for (var i = 0, ws = line.widgets; i < ws.length; ++i) {
+    var widget = ws[i], node = elt("div", [widget.node], "CodeMirror-linewidget")
+    if (!widget.handleMouseEvents) { node.setAttribute("cm-ignore-events", "true") }
+    positionLineWidget(widget, node, lineView, dims)
+    cm.display.input.setUneditable(node)
+    if (allowAbove && widget.above)
+      { wrap.insertBefore(node, lineView.gutter || lineView.text) }
+    else
+      { wrap.appendChild(node) }
+    signalLater(widget, "redraw")
+  }
+}
+
+function positionLineWidget(widget, node, lineView, dims) {
+  if (widget.noHScroll) {
+    ;(lineView.alignable || (lineView.alignable = [])).push(node)
+    var width = dims.wrapperWidth
+    node.style.left = dims.fixedPos + "px"
+    if (!widget.coverGutter) {
+      width -= dims.gutterTotalWidth
+      node.style.paddingLeft = dims.gutterTotalWidth + "px"
+    }
+    node.style.width = width + "px"
+  }
+  if (widget.coverGutter) {
+    node.style.zIndex = 5
+    node.style.position = "relative"
+    if (!widget.noHScroll) { node.style.marginLeft = -dims.gutterTotalWidth + "px" }
+  }
+}
+
+function widgetHeight(widget) {
+  if (widget.height != null) { return widget.height }
+  var cm = widget.doc.cm
+  if (!cm) { return 0 }
+  if (!contains(document.body, widget.node)) {
+    var parentStyle = "position: relative;"
+    if (widget.coverGutter)
+      { parentStyle += "margin-left: -" + cm.display.gutters.offsetWidth + "px;" }
+    if (widget.noHScroll)
+      { parentStyle += "width: " + cm.display.wrapper.clientWidth + "px;" }
+    removeChildrenAndAdd(cm.display.measure, elt("div", [widget.node], null, parentStyle))
+  }
+  return widget.height = widget.node.parentNode.offsetHeight
+}
+
+// Return true when the given mouse event happened in a widget
+function eventInWidget(display, e) {
+  for (var n = e_target(e); n != display.wrapper; n = n.parentNode) {
+    if (!n || (n.nodeType == 1 && n.getAttribute("cm-ignore-events") == "true") ||
+        (n.parentNode == display.sizer && n != display.mover))
+      { return true }
+  }
+}
+
+// POSITION MEASUREMENT
+
+function paddingTop(display) {return display.lineSpace.offsetTop}
+function paddingVert(display) {return display.mover.offsetHeight - display.lineSpace.offsetHeight}
+function paddingH(display) {
+  if (display.cachedPaddingH) { return display.cachedPaddingH }
+  var e = removeChildrenAndAdd(display.measure, elt("pre", "x"))
+  var style = window.getComputedStyle ? window.getComputedStyle(e) : e.currentStyle
+  var data = {left: parseInt(style.paddingLeft), right: parseInt(style.paddingRight)}
+  if (!isNaN(data.left) && !isNaN(data.right)) { display.cachedPaddingH = data }
+  return data
+}
+
+function scrollGap(cm) { return scrollerGap - cm.display.nativeBarWidth }
+function displayWidth(cm) {
+  return cm.display.scroller.clientWidth - scrollGap(cm) - cm.display.barWidth
+}
+function displayHeight(cm) {
+  return cm.display.scroller.clientHeight - scrollGap(cm) - cm.display.barHeight
+}
+
+// Ensure the lineView.wrapping.heights array is populated. This is
+// an array of bottom offsets for the lines that make up a drawn
+// line. When lineWrapping is on, there might be more than one
+// height.
+function ensureLineHeights(cm, lineView, rect) {
+  var wrapping = cm.options.lineWrapping
+  var curWidth = wrapping && displayWidth(cm)
+  if (!lineView.measure.heights || wrapping && lineView.measure.width != curWidth) {
+    var heights = lineView.measure.heights = []
+    if (wrapping) {
+      lineView.measure.width = curWidth
+      var rects = lineView.text.firstChild.getClientRects()
+      for (var i = 0; i < rects.length - 1; i++) {
+        var cur = rects[i], next = rects[i + 1]
+        if (Math.abs(cur.bottom - next.bottom) > 2)
+          { heights.push((cur.bottom + next.top) / 2 - rect.top) }
+      }
+    }
+    heights.push(rect.bottom - rect.top)
+  }
+}
+
+// Find a line map (mapping character offsets to text nodes) and a
+// measurement cache for the given line number. (A line view might
+// contain multiple lines when collapsed ranges are present.)
+function mapFromLineView(lineView, line, lineN) {
+  if (lineView.line == line)
+    { return {map: lineView.measure.map, cache: lineView.measure.cache} }
+  for (var i = 0; i < lineView.rest.length; i++)
+    { if (lineView.rest[i] == line)
+      { return {map: lineView.measure.maps[i], cache: lineView.measure.caches[i]} } }
+  for (var i$1 = 0; i$1 < lineView.rest.length; i$1++)
+    { if (lineNo(lineView.rest[i$1]) > lineN)
+      { return {map: lineView.measure.maps[i$1], cache: lineView.measure.caches[i$1], before: true} } }
+}
+
+// Render a line into the hidden node display.externalMeasured. Used
+// when measurement is needed for a line that's not in the viewport.
+function updateExternalMeasurement(cm, line) {
+  line = visualLine(line)
+  var lineN = lineNo(line)
+  var view = cm.display.externalMeasured = new LineView(cm.doc, line, lineN)
+  view.lineN = lineN
+  var built = view.built = buildLineContent(cm, view)
+  view.text = built.pre
+  removeChildrenAndAdd(cm.display.lineMeasure, built.pre)
+  return view
+}
+
+// Get a {top, bottom, left, right} box (in line-local coordinates)
+// for a given character.
+function measureChar(cm, line, ch, bias) {
+  return measureCharPrepared(cm, prepareMeasureForLine(cm, line), ch, bias)
+}
+
+// Find a line view that corresponds to the given line number.
+function findViewForLine(cm, lineN) {
+  if (lineN >= cm.display.viewFrom && lineN < cm.display.viewTo)
+    { return cm.display.view[findViewIndex(cm, lineN)] }
+  var ext = cm.display.externalMeasured
+  if (ext && lineN >= ext.lineN && lineN < ext.lineN + ext.size)
+    { return ext }
+}
+
+// Measurement can be split in two steps, the set-up work that
+// applies to the whole line, and the measurement of the actual
+// character. Functions like coordsChar, that need to do a lot of
+// measurements in a row, can thus ensure that the set-up work is
+// only done once.
+function prepareMeasureForLine(cm, line) {
+  var lineN = lineNo(line)
+  var view = findViewForLine(cm, lineN)
+  if (view && !view.text) {
+    view = null
+  } else if (view && view.changes) {
+    updateLineForChanges(cm, view, lineN, getDimensions(cm))
+    cm.curOp.forceUpdate = true
+  }
+  if (!view)
+    { view = updateExternalMeasurement(cm, line) }
+
+  var info = mapFromLineView(view, line, lineN)
+  return {
+    line: line, view: view, rect: null,
+    map: info.map, cache: info.cache, before: info.before,
+    hasHeights: false
+  }
+}
+
+// Given a prepared measurement object, measures the position of an
+// actual character (or fetches it from the cache).
+function measureCharPrepared(cm, prepared, ch, bias, varHeight) {
+  if (prepared.before) { ch = -1 }
+  var key = ch + (bias || ""), found
+  if (prepared.cache.hasOwnProperty(key)) {
+    found = prepared.cache[key]
+  } else {
+    if (!prepared.rect)
+      { prepared.rect = prepared.view.text.getBoundingClientRect() }
+    if (!prepared.hasHeights) {
+      ensureLineHeights(cm, prepared.view, prepared.rect)
+      prepared.hasHeights = true
+    }
+    found = measureCharInner(cm, prepared, ch, bias)
+    if (!found.bogus) { prepared.cache[key] = found }
+  }
+  return {left: found.left, right: found.right,
+          top: varHeight ? found.rtop : found.top,
+          bottom: varHeight ? found.rbottom : found.bottom}
+}
+
+var nullRect = {left: 0, right: 0, top: 0, bottom: 0}
+
+function nodeAndOffsetInLineMap(map, ch, bias) {
+  var node, start, end, collapse, mStart, mEnd
+  // First, search the line map for the text node corresponding to,
+  // or closest to, the target character.
+  for (var i = 0; i < map.length; i += 3) {
+    mStart = map[i]
+    mEnd = map[i + 1]
+    if (ch < mStart) {
+      start = 0; end = 1
+      collapse = "left"
+    } else if (ch < mEnd) {
+      start = ch - mStart
+      end = start + 1
+    } else if (i == map.length - 3 || ch == mEnd && map[i + 3] > ch) {
+      end = mEnd - mStart
+      start = end - 1
+      if (ch >= mEnd) { collapse = "right" }
+    }
+    if (start != null) {
+      node = map[i + 2]
+      if (mStart == mEnd && bias == (node.insertLeft ? "left" : "right"))
+        { collapse = bias }
+      if (bias == "left" && start == 0)
+        { while (i && map[i - 2] == map[i - 3] && map[i - 1].insertLeft) {
+          node = map[(i -= 3) + 2]
+          collapse = "left"
+        } }
+      if (bias == "right" && start == mEnd - mStart)
+        { while (i < map.length - 3 && map[i + 3] == map[i + 4] && !map[i + 5].insertLeft) {
+          node = map[(i += 3) + 2]
+          collapse = "right"
+        } }
+      break
+    }
+  }
+  return {node: node, start: start, end: end, collapse: collapse, coverStart: mStart, coverEnd: mEnd}
+}
+
+function getUsefulRect(rects, bias) {
+  var rect = nullRect
+  if (bias == "left") { for (var i = 0; i < rects.length; i++) {
+    if ((rect = rects[i]).left != rect.right) { break }
+  } } else { for (var i$1 = rects.length - 1; i$1 >= 0; i$1--) {
+    if ((rect = rects[i$1]).left != rect.right) { break }
+  } }
+  return rect
+}
+
+function measureCharInner(cm, prepared, ch, bias) {
+  var place = nodeAndOffsetInLineMap(prepared.map, ch, bias)
+  var node = place.node, start = place.start, end = place.end, collapse = place.collapse
+
+  var rect
+  if (node.nodeType == 3) { // If it is a text node, use a range to retrieve the coordinates.
+    for (var i$1 = 0; i$1 < 4; i$1++) { // Retry a maximum of 4 times when nonsense rectangles are returned
+      while (start && isExtendingChar(prepared.line.text.charAt(place.coverStart + start))) { --start }
+      while (place.coverStart + end < place.coverEnd && isExtendingChar(prepared.line.text.charAt(place.coverStart + end))) { ++end }
+      if (ie && ie_version < 9 && start == 0 && end == place.coverEnd - place.coverStart)
+        { rect = node.parentNode.getBoundingClientRect() }
+      else
+        { rect = getUsefulRect(range(node, start, end).getClientRects(), bias) }
+      if (rect.left || rect.right || start == 0) { break }
+      end = start
+      start = start - 1
+      collapse = "right"
+    }
+    if (ie && ie_version < 11) { rect = maybeUpdateRectForZooming(cm.display.measure, rect) }
+  } else { // If it is a widget, simply get the box for the whole widget.
+    if (start > 0) { collapse = bias = "right" }
+    var rects
+    if (cm.options.lineWrapping && (rects = node.getClientRects()).length > 1)
+      { rect = rects[bias == "right" ? rects.length - 1 : 0] }
+    else
+      { rect = node.getBoundingClientRect() }
+  }
+  if (ie && ie_version < 9 && !start && (!rect || !rect.left && !rect.right)) {
+    var rSpan = node.parentNode.getClientRects()[0]
+    if (rSpan)
+      { rect = {left: rSpan.left, right: rSpan.left + charWidth(cm.display), top: rSpan.top, bottom: rSpan.bottom} }
+    else
+      { rect = nullRect }
+  }
+
+  var rtop = rect.top - prepared.rect.top, rbot = rect.bottom - prepared.rect.top
+  var mid = (rtop + rbot) / 2
+  var heights = prepared.view.measure.heights
+  var i = 0
+  for (; i < heights.length - 1; i++)
+    { if (mid < heights[i]) { break } }
+  var top = i ? heights[i - 1] : 0, bot = heights[i]
+  var result = {left: (collapse == "right" ? rect.right : rect.left) - prepared.rect.left,
+                right: (collapse == "left" ? rect.left : rect.right) - prepared.rect.left,
+                top: top, bottom: bot}
+  if (!rect.left && !rect.right) { result.bogus = true }
+  if (!cm.options.singleCursorHeightPerLine) { result.rtop = rtop; result.rbottom = rbot }
+
+  return result
+}
+
+// Work around problem with bounding client rects on ranges being
+// returned incorrectly when zoomed on IE10 and below.
+function maybeUpdateRectForZooming(measure, rect) {
+  if (!window.screen || screen.logicalXDPI == null ||
+      screen.logicalXDPI == screen.deviceXDPI || !hasBadZoomedRects(measure))
+    { return rect }
+  var scaleX = screen.logicalXDPI / screen.deviceXDPI
+  var scaleY = screen.logicalYDPI / screen.deviceYDPI
+  return {left: rect.left * scaleX, right: rect.right * scaleX,
+          top: rect.top * scaleY, bottom: rect.bottom * scaleY}
+}
+
+function clearLineMeasurementCacheFor(lineView) {
+  if (lineView.measure) {
+    lineView.measure.cache = {}
+    lineView.measure.heights = null
+    if (lineView.rest) { for (var i = 0; i < lineView.rest.length; i++)
+      { lineView.measure.caches[i] = {} } }
+  }
+}
+
+function clearLineMeasurementCache(cm) {
+  cm.display.externalMeasure = null
+  removeChildren(cm.display.lineMeasure)
+  for (var i = 0; i < cm.display.view.length; i++)
+    { clearLineMeasurementCacheFor(cm.display.view[i]) }
+}
+
+function clearCaches(cm) {
+  clearLineMeasurementCache(cm)
+  cm.display.cachedCharWidth = cm.display.cachedTextHeight = cm.display.cachedPaddingH = null
+  if (!cm.options.lineWrapping) { cm.display.maxLineChanged = true }
+  cm.display.lineNumChars = null
+}
+
+function pageScrollX() {
+  // Work around https://bugs.chromium.org/p/chromium/issues/detail?id=489206
+  // which causes page_Offset and bounding client rects to use
+  // different reference viewports and invalidate our calculations.
+  if (chrome && android) { return -(document.body.getBoundingClientRect().left - parseInt(getComputedStyle(document.body).marginLeft)) }
+  return window.pageXOffset || (document.documentElement || document.body).scrollLeft
+}
+function pageScrollY() {
+  if (chrome && android) { return -(document.body.getBoundingClientRect().top - parseInt(getComputedStyle(document.body).marginTop)) }
+  return window.pageYOffset || (document.documentElement || document.body).scrollTop
+}
+
+function widgetTopHeight(lineObj) {
+  var height = 0
+  if (lineObj.widgets) { for (var i = 0; i < lineObj.widgets.length; ++i) { if (lineObj.widgets[i].above)
+    { height += widgetHeight(lineObj.widgets[i]) } } }
+  return height
+}
+
+// Converts a {top, bottom, left, right} box from line-local
+// coordinates into another coordinate system. Context may be one of
+// "line", "div" (display.lineDiv), "local"./null (editor), "window",
+// or "page".
+function intoCoordSystem(cm, lineObj, rect, context, includeWidgets) {
+  if (!includeWidgets) {
+    var height = widgetTopHeight(lineObj)
+    rect.top += height; rect.bottom += height
+  }
+  if (context == "line") { return rect }
+  if (!context) { context = "local" }
+  var yOff = heightAtLine(lineObj)
+  if (context == "local") { yOff += paddingTop(cm.display) }
+  else { yOff -= cm.display.viewOffset }
+  if (context == "page" || context == "window") {
+    var lOff = cm.display.lineSpace.getBoundingClientRect()
+    yOff += lOff.top + (context == "window" ? 0 : pageScrollY())
+    var xOff = lOff.left + (context == "window" ? 0 : pageScrollX())
+    rect.left += xOff; rect.right += xOff
+  }
+  rect.top += yOff; rect.bottom += yOff
+  return rect
+}
+
+// Coverts a box from "div" coords to another coordinate system.
+// Context may be "window", "page", "div", or "local"./null.
+function fromCoordSystem(cm, coords, context) {
+  if (context == "div") { return coords }
+  var left = coords.left, top = coords.top
+  // First move into "page" coordinate system
+  if (context == "page") {
+    left -= pageScrollX()
+    top -= pageScrollY()
+  } else if (context == "local" || !context) {
+    var localBox = cm.display.sizer.getBoundingClientRect()
+    left += localBox.left
+    top += localBox.top
+  }
+
+  var lineSpaceBox = cm.display.lineSpace.getBoundingClientRect()
+  return {left: left - lineSpaceBox.left, top: top - lineSpaceBox.top}
+}
+
+function charCoords(cm, pos, context, lineObj, bias) {
+  if (!lineObj) { lineObj = getLine(cm.doc, pos.line) }
+  return intoCoordSystem(cm, lineObj, measureChar(cm, lineObj, pos.ch, bias), context)
+}
+
+// Returns a box for a given cursor position, which may have an
+// 'other' property containing the position of the secondary cursor
+// on a bidi boundary.
+// A cursor Pos(line, char, "before") is on the same visual line as `char - 1`
+// and after `char - 1` in writing order of `char - 1`
+// A cursor Pos(line, char, "after") is on the same visual line as `char`
+// and before `char` in writing order of `char`
+// Examples (upper-case letters are RTL, lower-case are LTR):
+//     Pos(0, 1, ...)
+//     before   after
+// ab     a|b     a|b
+// aB     a|B     aB|
+// Ab     |Ab     A|b
+// AB     B|A     B|A
+// Every position after the last character on a line is considered to stick
+// to the last character on the line.
+function cursorCoords(cm, pos, context, lineObj, preparedMeasure, varHeight) {
+  lineObj = lineObj || getLine(cm.doc, pos.line)
+  if (!preparedMeasure) { preparedMeasure = prepareMeasureForLine(cm, lineObj) }
+  function get(ch, right) {
+    var m = measureCharPrepared(cm, preparedMeasure, ch, right ? "right" : "left", varHeight)
+    if (right) { m.left = m.right; } else { m.right = m.left }
+    return intoCoordSystem(cm, lineObj, m, context)
+  }
+  var order = getOrder(lineObj, cm.doc.direction), ch = pos.ch, sticky = pos.sticky
+  if (ch >= lineObj.text.length) {
+    ch = lineObj.text.length
+    sticky = "before"
+  } else if (ch <= 0) {
+    ch = 0
+    sticky = "after"
+  }
+  if (!order) { return get(sticky == "before" ? ch - 1 : ch, sticky == "before") }
+
+  function getBidi(ch, partPos, invert) {
+    var part = order[partPos], right = part.level == 1
+    return get(invert ? ch - 1 : ch, right != invert)
+  }
+  var partPos = getBidiPartAt(order, ch, sticky)
+  var other = bidiOther
+  var val = getBidi(ch, partPos, sticky == "before")
+  if (other != null) { val.other = getBidi(ch, other, sticky != "before") }
+  return val
+}
+
+// Used to cheaply estimate the coordinates for a position. Used for
+// intermediate scroll updates.
+function estimateCoords(cm, pos) {
+  var left = 0
+  pos = clipPos(cm.doc, pos)
+  if (!cm.options.lineWrapping) { left = charWidth(cm.display) * pos.ch }
+  var lineObj = getLine(cm.doc, pos.line)
+  var top = heightAtLine(lineObj) + paddingTop(cm.display)
+  return {left: left, right: left, top: top, bottom: top + lineObj.height}
+}
+
+// Positions returned by coordsChar contain some extra information.
+// xRel is the relative x position of the input coordinates compared
+// to the found position (so xRel > 0 means the coordinates are to
+// the right of the character position, for example). When outside
+// is true, that means the coordinates lie outside the line's
+// vertical range.
+function PosWithInfo(line, ch, sticky, outside, xRel) {
+  var pos = Pos(line, ch, sticky)
+  pos.xRel = xRel
+  if (outside) { pos.outside = true }
+  return pos
+}
+
+// Compute the character position closest to the given coordinates.
+// Input must be lineSpace-local ("div" coordinate system).
+function coordsChar(cm, x, y) {
+  var doc = cm.doc
+  y += cm.display.viewOffset
+  if (y < 0) { return PosWithInfo(doc.first, 0, null, true, -1) }
+  var lineN = lineAtHeight(doc, y), last = doc.first + doc.size - 1
+  if (lineN > last)
+    { return PosWithInfo(doc.first + doc.size - 1, getLine(doc, last).text.length, null, true, 1) }
+  if (x < 0) { x = 0 }
+
+  var lineObj = getLine(doc, lineN)
+  for (;;) {
+    var found = coordsCharInner(cm, lineObj, lineN, x, y)
+    var merged = collapsedSpanAtEnd(lineObj)
+    var mergedPos = merged && merged.find(0, true)
+    if (merged && (found.ch > mergedPos.from.ch || found.ch == mergedPos.from.ch && found.xRel > 0))
+      { lineN = lineNo(lineObj = mergedPos.to.line) }
+    else
+      { return found }
+  }
+}
+
+function wrappedLineExtent(cm, lineObj, preparedMeasure, y) {
+  y -= widgetTopHeight(lineObj)
+  var end = lineObj.text.length
+  var begin = findFirst(function (ch) { return measureCharPrepared(cm, preparedMeasure, ch - 1).bottom <= y; }, end, 0)
+  end = findFirst(function (ch) { return measureCharPrepared(cm, preparedMeasure, ch).top > y; }, begin, end)
+  return {begin: begin, end: end}
+}
+
+function wrappedLineExtentChar(cm, lineObj, preparedMeasure, target) {
+  if (!preparedMeasure) { preparedMeasure = prepareMeasureForLine(cm, lineObj) }
+  var targetTop = intoCoordSystem(cm, lineObj, measureCharPrepared(cm, preparedMeasure, target), "line").top
+  return wrappedLineExtent(cm, lineObj, preparedMeasure, targetTop)
+}
+
+// Returns true if the given side of a box is after the given
+// coordinates, in top-to-bottom, left-to-right order.
+function boxIsAfter(box, x, y, left) {
+  return box.bottom <= y ? false : box.top > y ? true : (left ? box.left : box.right) > x
+}
+
+function coordsCharInner(cm, lineObj, lineNo, x, y) {
+  // Move y into line-local coordinate space
+  y -= heightAtLine(lineObj)
+  var preparedMeasure = prepareMeasureForLine(cm, lineObj)
+  // When directly calling `measureCharPrepared`, we have to adjust
+  // for the widgets at this line.
+  var widgetHeight = widgetTopHeight(lineObj)
+  var begin = 0, end = lineObj.text.length, ltr = true
+
+  var order = getOrder(lineObj, cm.doc.direction)
+  // If the line isn't plain left-to-right text, first figure out
+  // which bidi section the coordinates fall into.
+  if (order) {
+    var part = (cm.options.lineWrapping ? coordsBidiPartWrapped : coordsBidiPart)
+                 (cm, lineObj, lineNo, preparedMeasure, order, x, y)
+    ltr = part.level != 1
+    // The awkward -1 offsets are needed because findFirst (called
+    // on these below) will treat its first bound as inclusive,
+    // second as exclusive, but we want to actually address the
+    // characters in the part's range
+    begin = ltr ? part.from : part.to - 1
+    end = ltr ? part.to : part.from - 1
+  }
+
+  // A binary search to find the first character whose bounding box
+  // starts after the coordinates. If we run across any whose box wrap
+  // the coordinates, store that.
+  var chAround = null, boxAround = null
+  var ch = findFirst(function (ch) {
+    var box = measureCharPrepared(cm, preparedMeasure, ch)
+    box.top += widgetHeight; box.bottom += widgetHeight
+    if (!boxIsAfter(box, x, y, false)) { return false }
+    if (box.top <= y && box.left <= x) {
+      chAround = ch
+      boxAround = box
+    }
+    return true
+  }, begin, end)
+
+  var baseX, sticky, outside = false
+  // If a box around the coordinates was found, use that
+  if (boxAround) {
+    // Distinguish coordinates nearer to the left or right side of the box
+    var atLeft = x - boxAround.left < boxAround.right - x, atStart = atLeft == ltr
+    ch = chAround + (atStart ? 0 : 1)
+    sticky = atStart ? "after" : "before"
+    baseX = atLeft ? boxAround.left : boxAround.right
+  } else {
+    // (Adjust for extended bound, if necessary.)
+    if (!ltr && (ch == end || ch == begin)) { ch++ }
+    // To determine which side to associate with, get the box to the
+    // left of the character and compare it's vertical position to the
+    // coordinates
+    sticky = ch == 0 ? "after" : ch == lineObj.text.length ? "before" :
+      (measureCharPrepared(cm, preparedMeasure, ch - (ltr ? 1 : 0)).bottom + widgetHeight <= y) == ltr ?
+      "after" : "before"
+    // Now get accurate coordinates for this place, in order to get a
+    // base X position
+    var coords = cursorCoords(cm, Pos(lineNo, ch, sticky), "line", lineObj, preparedMeasure)
+    baseX = coords.left
+    outside = y < coords.top || y >= coords.bottom
+  }
+
+  ch = skipExtendingChars(lineObj.text, ch, 1)
+  return PosWithInfo(lineNo, ch, sticky, outside, x - baseX)
+}
+
+function coordsBidiPart(cm, lineObj, lineNo, preparedMeasure, order, x, y) {
+  // Bidi parts are sorted left-to-right, and in a non-line-wrapping
+  // situation, we can take this ordering to correspond to the visual
+  // ordering. This finds the first part whose end is after the given
+  // coordinates.
+  var index = findFirst(function (i) {
+    var part = order[i], ltr = part.level != 1
+    return boxIsAfter(cursorCoords(cm, Pos(lineNo, ltr ? part.to : part.from, ltr ? "before" : "after"),
+                                   "line", lineObj, preparedMeasure), x, y, true)
+  }, 0, order.length - 1)
+  var part = order[index]
+  // If this isn't the first part, the part's start is also after
+  // the coordinates, and the coordinates aren't on the same line as
+  // that start, move one part back.
+  if (index > 0) {
+    var ltr = part.level != 1
+    var start = cursorCoords(cm, Pos(lineNo, ltr ? part.from : part.to, ltr ? "after" : "before"),
+                             "line", lineObj, preparedMeasure)
+    if (boxIsAfter(start, x, y, true) && start.top > y)
+      { part = order[index - 1] }
+  }
+  return part
+}
+
+function coordsBidiPartWrapped(cm, lineObj, _lineNo, preparedMeasure, order, x, y) {
+  // In a wrapped line, rtl text on wrapping boundaries can do things
+  // that don't correspond to the ordering in our `order` array at
+  // all, so a binary search doesn't work, and we want to return a
+  // part that only spans one line so that the binary search in
+  // coordsCharInner is safe. As such, we first find the extent of the
+  // wrapped line, and then do a flat search in which we discard any
+  // spans that aren't on the line.
+  var ref = wrappedLineExtent(cm, lineObj, preparedMeasure, y);
+  var begin = ref.begin;
+  var end = ref.end;
+  var part = null, closestDist = null
+  for (var i = 0; i < order.length; i++) {
+    var p = order[i]
+    if (p.from >= end || p.to <= begin) { continue }
+    var ltr = p.level != 1
+    var endX = measureCharPrepared(cm, preparedMeasure, ltr ? Math.min(end, p.to) - 1 : Math.max(begin, p.from)).right
+    // Weigh against spans ending before this, so that they are only
+    // picked if nothing ends after
+    var dist = endX < x ? x - endX + 1e9 : endX - x
+    if (!part || closestDist > dist) {
+      part = p
+      closestDist = dist
+    }
+  }
+  if (!part) { part = order[order.length - 1] }
+  // Clip the part to the wrapped line.
+  if (part.from < begin) { part = {from: begin, to: part.to, level: part.level} }
+  if (part.to > end) { part = {from: part.from, to: end, level: part.level} }
+  return part
+}
+
+var measureText
+// Compute the default text height.
+function textHeight(display) {
+  if (display.cachedTextHeight != null) { return display.cachedTextHeight }
+  if (measureText == null) {
+    measureText = elt("pre")
+    // Measure a bunch of lines, for browsers that compute
+    // fractional heights.
+    for (var i = 0; i < 49; ++i) {
+      measureText.appendChild(document.createTextNode("x"))
+      measureText.appendChild(elt("br"))
+    }
+    measureText.appendChild(document.createTextNode("x"))
+  }
+  removeChildrenAndAdd(display.measure, measureText)
+  var height = measureText.offsetHeight / 50
+  if (height > 3) { display.cachedTextHeight = height }
+  removeChildren(display.measure)
+  return height || 1
+}
+
+// Compute the default character width.
+function charWidth(display) {
+  if (display.cachedCharWidth != null) { return display.cachedCharWidth }
+  var anchor = elt("span", "xxxxxxxxxx")
+  var pre = elt("pre", [anchor])
+  removeChildrenAndAdd(display.measure, pre)
+  var rect = anchor.getBoundingClientRect(), width = (rect.right - rect.left) / 10
+  if (width > 2) { display.cachedCharWidth = width }
+  return width || 10
+}
+
+// Do a bulk-read of the DOM positions and sizes needed to draw the
+// view, so that we don't interleave reading and writing to the DOM.
+function getDimensions(cm) {
+  var d = cm.display, left = {}, width = {}
+  var gutterLeft = d.gutters.clientLeft
+  for (var n = d.gutters.firstChild, i = 0; n; n = n.nextSibling, ++i) {
+    left[cm.options.gutters[i]] = n.offsetLeft + n.clientLeft + gutterLeft
+    width[cm.options.gutters[i]] = n.clientWidth
+  }
+  return {fixedPos: compensateForHScroll(d),
+          gutterTotalWidth: d.gutters.offsetWidth,
+          gutterLeft: left,
+          gutterWidth: width,
+          wrapperWidth: d.wrapper.clientWidth}
+}
+
+// Computes display.scroller.scrollLeft + display.gutters.offsetWidth,
+// but using getBoundingClientRect to get a sub-pixel-accurate
+// result.
+function compensateForHScroll(display) {
+  return display.scroller.getBoundingClientRect().left - display.sizer.getBoundingClientRect().left
+}
+
+// Returns a function that estimates the height of a line, to use as
+// first approximation until the line becomes visible (and is thus
+// properly measurable).
+function estimateHeight(cm) {
+  var th = textHeight(cm.display), wrapping = cm.options.lineWrapping
+  var perLine = wrapping && Math.max(5, cm.display.scroller.clientWidth / charWidth(cm.display) - 3)
+  return function (line) {
+    if (lineIsHidden(cm.doc, line)) { return 0 }
+
+    var widgetsHeight = 0
+    if (line.widgets) { for (var i = 0; i < line.widgets.length; i++) {
+      if (line.widgets[i].height) { widgetsHeight += line.widgets[i].height }
+    } }
+
+    if (wrapping)
+      { return widgetsHeight + (Math.ceil(line.text.length / perLine) || 1) * th }
+    else
+      { return widgetsHeight + th }
+  }
+}
+
+function estimateLineHeights(cm) {
+  var doc = cm.doc, est = estimateHeight(cm)
+  doc.iter(function (line) {
+    var estHeight = est(line)
+    if (estHeight != line.height) { updateLineHeight(line, estHeight) }
+  })
+}
+
+// Given a mouse event, find the corresponding position. If liberal
+// is false, it checks whether a gutter or scrollbar was clicked,
+// and returns null if it was. forRect is used by rectangular
+// selections, and tries to estimate a character position even for
+// coordinates beyond the right of the text.
+function posFromMouse(cm, e, liberal, forRect) {
+  var display = cm.display
+  if (!liberal && e_target(e).getAttribute("cm-not-content") == "true") { return null }
+
+  var x, y, space = display.lineSpace.getBoundingClientRect()
+  // Fails unpredictably on IE[67] when mouse is dragged around quickly.
+  try { x = e.clientX - space.left; y = e.clientY - space.top }
+  catch (e) { return null }
+  var coords = coordsChar(cm, x, y), line
+  if (forRect && coords.xRel == 1 && (line = getLine(cm.doc, coords.line).text).length == coords.ch) {
+    var colDiff = countColumn(line, line.length, cm.options.tabSize) - line.length
+    coords = Pos(coords.line, Math.max(0, Math.round((x - paddingH(cm.display).left) / charWidth(cm.display)) - colDiff))
+  }
+  return coords
+}
+
+// Find the view element corresponding to a given line. Return null
+// when the line isn't visible.
+function findViewIndex(cm, n) {
+  if (n >= cm.display.viewTo) { return null }
+  n -= cm.display.viewFrom
+  if (n < 0) { return null }
+  var view = cm.display.view
+  for (var i = 0; i < view.length; i++) {
+    n -= view[i].size
+    if (n < 0) { return i }
+  }
+}
+
+function updateSelection(cm) {
+  cm.display.input.showSelection(cm.display.input.prepareSelection())
+}
+
+function prepareSelection(cm, primary) {
+  if ( primary === void 0 ) primary = true;
+
+  var doc = cm.doc, result = {}
+  var curFragment = result.cursors = document.createDocumentFragment()
+  var selFragment = result.selection = document.createDocumentFragment()
+
+  for (var i = 0; i < doc.sel.ranges.length; i++) {
+    if (!primary && i == doc.sel.primIndex) { continue }
+    var range = doc.sel.ranges[i]
+    if (range.from().line >= cm.display.viewTo || range.to().line < cm.display.viewFrom) { continue }
+    var collapsed = range.empty()
+    if (collapsed || cm.options.showCursorWhenSelecting)
+      { drawSelectionCursor(cm, range.head, curFragment) }
+    if (!collapsed)
+      { drawSelectionRange(cm, range, selFragment) }
+  }
+  return result
+}
+
+// Draws a cursor for the given range
+function drawSelectionCursor(cm, head, output) {
+  var pos = cursorCoords(cm, head, "div", null, null, !cm.options.singleCursorHeightPerLine)
+
+  var cursor = output.appendChild(elt("div", "\u00a0", "CodeMirror-cursor"))
+  cursor.style.left = pos.left + "px"
+  cursor.style.top = pos.top + "px"
+  cursor.style.height = Math.max(0, pos.bottom - pos.top) * cm.options.cursorHeight + "px"
+
+  if (pos.other) {
+    // Secondary cursor, shown when on a 'jump' in bi-directional text
+    var otherCursor = output.appendChild(elt("div", "\u00a0", "CodeMirror-cursor CodeMirror-secondarycursor"))
+    otherCursor.style.display = ""
+    otherCursor.style.left = pos.other.left + "px"
+    otherCursor.style.top = pos.other.top + "px"
+    otherCursor.style.height = (pos.other.bottom - pos.other.top) * .85 + "px"
+  }
+}
+
+function cmpCoords(a, b) { return a.top - b.top || a.left - b.left }
+
+// Draws the given range as a highlighted selection
+function drawSelectionRange(cm, range, output) {
+  var display = cm.display, doc = cm.doc
+  var fragment = document.createDocumentFragment()
+  var padding = paddingH(cm.display), leftSide = padding.left
+  var rightSide = Math.max(display.sizerWidth, displayWidth(cm) - display.sizer.offsetLeft) - padding.right
+
+  function add(left, top, width, bottom) {
+    if (top < 0) { top = 0 }
+    top = Math.round(top)
+    bottom = Math.round(bottom)
+    fragment.appendChild(elt("div", null, "CodeMirror-selected", ("position: absolute; left: " + left + "px;\n                             top: " + top + "px; width: " + (width == null ? rightSide - left : width) + "px;\n                             height: " + (bottom - top) + "px")))
+  }
+
+  function drawForLine(line, fromArg, toArg) {
+    var lineObj = getLine(doc, line)
+    var lineLen = lineObj.text.length
+    var start, end
+    function coords(ch, bias) {
+      return charCoords(cm, Pos(line, ch), "div", lineObj, bias)
+    }
+
+    var order = getOrder(lineObj, doc.direction)
+    iterateBidiSections(order, fromArg || 0, toArg == null ? lineLen : toArg, function (from, to, dir, i) {
+      var fromPos = coords(from, dir == "ltr" ? "left" : "right")
+      var toPos = coords(to - 1, dir == "ltr" ? "right" : "left")
+      if (dir == "ltr") {
+        var fromLeft = fromArg == null && from == 0 ? leftSide : fromPos.left
+        var toRight = toArg == null && to == lineLen ? rightSide : toPos.right
+        if (toPos.top - fromPos.top <= 3) { // Single line
+          add(fromLeft, toPos.top, toRight - fromLeft, toPos.bottom)
+        } else { // Multiple lines
+          add(fromLeft, fromPos.top, null, fromPos.bottom)
+          if (fromPos.bottom < toPos.top) { add(leftSide, fromPos.bottom, null, toPos.top) }
+          add(leftSide, toPos.top, toPos.right, toPos.bottom)
+        }
+      } else if (from < to) { // RTL
+        var fromRight = fromArg == null && from == 0 ? rightSide : fromPos.right
+        var toLeft = toArg == null && to == lineLen ? leftSide : toPos.left
+        if (toPos.top - fromPos.top <= 3) { // Single line
+          add(toLeft, toPos.top, fromRight - toLeft, toPos.bottom)
+        } else { // Multiple lines
+          var topLeft = leftSide
+          if (i) {
+            var topEnd = wrappedLineExtentChar(cm, lineObj, null, from).end
+            // The coordinates returned for an RTL wrapped space tend to
+            // be complete bogus, so try to skip that here.
+            topLeft = coords(topEnd - (/\s/.test(lineObj.text.charAt(topEnd - 1)) ? 2 : 1), "left").left
+          }
+          add(topLeft, fromPos.top, fromRight - topLeft, fromPos.bottom)
+          if (fromPos.bottom < toPos.top) { add(leftSide, fromPos.bottom, null, toPos.top) }
+          var botWidth = null
+          if (i < order.length  - 1 || true) {
+            var botStart = wrappedLineExtentChar(cm, lineObj, null, to).begin
+            botWidth = coords(botStart, "right").right - toLeft
+          }
+          add(toLeft, toPos.top, botWidth, toPos.bottom)
+        }
+      }
+
+      if (!start || cmpCoords(fromPos, start) < 0) { start = fromPos }
+      if (cmpCoords(toPos, start) < 0) { start = toPos }
+      if (!end || cmpCoords(fromPos, end) < 0) { end = fromPos }
+      if (cmpCoords(toPos, end) < 0) { end = toPos }
+    })
+    return {start: start, end: end}
+  }
+
+  var sFrom = range.from(), sTo = range.to()
+  if (sFrom.line == sTo.line) {
+    drawForLine(sFrom.line, sFrom.ch, sTo.ch)
+  } else {
+    var fromLine = getLine(doc, sFrom.line), toLine = getLine(doc, sTo.line)
+    var singleVLine = visualLine(fromLine) == visualLine(toLine)
+    var leftEnd = drawForLine(sFrom.line, sFrom.ch, singleVLine ? fromLine.text.length + 1 : null).end
+    var rightStart = drawForLine(sTo.line, singleVLine ? 0 : null, sTo.ch).start
+    if (singleVLine) {
+      if (leftEnd.top < rightStart.top - 2) {
+        add(leftEnd.right, leftEnd.top, null, leftEnd.bottom)
+        add(leftSide, rightStart.top, rightStart.left, rightStart.bottom)
+      } else {
+        add(leftEnd.right, leftEnd.top, rightStart.left - leftEnd.right, leftEnd.bottom)
+      }
+    }
+    if (leftEnd.bottom < rightStart.top)
+      { add(leftSide, leftEnd.bottom, null, rightStart.top) }
+  }
+
+  output.appendChild(fragment)
+}
+
+// Cursor-blinking
+function restartBlink(cm) {
+  if (!cm.state.focused) { return }
+  var display = cm.display
+  clearInterval(display.blinker)
+  var on = true
+  display.cursorDiv.style.visibility = ""
+  if (cm.options.cursorBlinkRate > 0)
+    { display.blinker = setInterval(function () { return display.cursorDiv.style.visibility = (on = !on) ? "" : "hidden"; },
+      cm.options.cursorBlinkRate) }
+  else if (cm.options.cursorBlinkRate < 0)
+    { display.cursorDiv.style.visibility = "hidden" }
+}
+
+function ensureFocus(cm) {
+  if (!cm.state.focused) { cm.display.input.focus(); onFocus(cm) }
+}
+
+function delayBlurEvent(cm) {
+  cm.state.delayingBlurEvent = true
+  setTimeout(function () { if (cm.state.delayingBlurEvent) {
+    cm.state.delayingBlurEvent = false
+    onBlur(cm)
+  } }, 100)
+}
+
+function onFocus(cm, e) {
+  if (cm.state.delayingBlurEvent) { cm.state.delayingBlurEvent = false }
+
+  if (cm.options.readOnly == "nocursor") { return }
+  if (!cm.state.focused) {
+    signal(cm, "focus", cm, e)
+    cm.state.focused = true
+    addClass(cm.display.wrapper, "CodeMirror-focused")
+    // This test prevents this from firing when a context
+    // menu is closed (since the input reset would kill the
+    // select-all detection hack)
+    if (!cm.curOp && cm.display.selForContextMenu != cm.doc.sel) {
+      cm.display.input.reset()
+      if (webkit) { setTimeout(function () { return cm.display.input.reset(true); }, 20) } // Issue #1730
+    }
+    cm.display.input.receivedFocus()
+  }
+  restartBlink(cm)
+}
+function onBlur(cm, e) {
+  if (cm.state.delayingBlurEvent) { return }
+
+  if (cm.state.focused) {
+    signal(cm, "blur", cm, e)
+    cm.state.focused = false
+    rmClass(cm.display.wrapper, "CodeMirror-focused")
+  }
+  clearInterval(cm.display.blinker)
+  setTimeout(function () { if (!cm.state.focused) { cm.display.shift = false } }, 150)
+}
+
+// Read the actual heights of the rendered lines, and update their
+// stored heights to match.
+function updateHeightsInViewport(cm) {
+  var display = cm.display
+  var prevBottom = display.lineDiv.offsetTop
+  for (var i = 0; i < display.view.length; i++) {
+    var cur = display.view[i], height = (void 0)
+    if (cur.hidden) { continue }
+    if (ie && ie_version < 8) {
+      var bot = cur.node.offsetTop + cur.node.offsetHeight
+      height = bot - prevBottom
+      prevBottom = bot
+    } else {
+      var box = cur.node.getBoundingClientRect()
+      height = box.bottom - box.top
+    }
+    var diff = cur.line.height - height
+    if (height < 2) { height = textHeight(display) }
+    if (diff > .005 || diff < -.005) {
+      updateLineHeight(cur.line, height)
+      updateWidgetHeight(cur.line)
+      if (cur.rest) { for (var j = 0; j < cur.rest.length; j++)
+        { updateWidgetHeight(cur.rest[j]) } }
+    }
+  }
+}
+
+// Read and store the height of line widgets associated with the
+// given line.
+function updateWidgetHeight(line) {
+  if (line.widgets) { for (var i = 0; i < line.widgets.length; ++i)
+    { line.widgets[i].height = line.widgets[i].node.parentNode.offsetHeight } }
+}
+
+// Compute the lines that are visible in a given viewport (defaults
+// the the current scroll position). viewport may contain top,
+// height, and ensure (see op.scrollToPos) properties.
+function visibleLines(display, doc, viewport) {
+  var top = viewport && viewport.top != null ? Math.max(0, viewport.top) : display.scroller.scrollTop
+  top = Math.floor(top - paddingTop(display))
+  var bottom = viewport && viewport.bottom != null ? viewport.bottom : top + display.wrapper.clientHeight
+
+  var from = lineAtHeight(doc, top), to = lineAtHeight(doc, bottom)
+  // Ensure is a {from: {line, ch}, to: {line, ch}} object, and
+  // forces those lines into the viewport (if possible).
+  if (viewport && viewport.ensure) {
+    var ensureFrom = viewport.ensure.from.line, ensureTo = viewport.ensure.to.line
+    if (ensureFrom < from) {
+      from = ensureFrom
+      to = lineAtHeight(doc, heightAtLine(getLine(doc, ensureFrom)) + display.wrapper.clientHeight)
+    } else if (Math.min(ensureTo, doc.lastLine()) >= to) {
+      from = lineAtHeight(doc, heightAtLine(getLine(doc, ensureTo)) - display.wrapper.clientHeight)
+      to = ensureTo
+    }
+  }
+  return {from: from, to: Math.max(to, from + 1)}
+}
+
+// Re-align line numbers and gutter marks to compensate for
+// horizontal scrolling.
+function alignHorizontally(cm) {
+  var display = cm.display, view = display.view
+  if (!display.alignWidgets && (!display.gutters.firstChild || !cm.options.fixedGutter)) { return }
+  var comp = compensateForHScroll(display) - display.scroller.scrollLeft + cm.doc.scrollLeft
+  var gutterW = display.gutters.offsetWidth, left = comp + "px"
+  for (var i = 0; i < view.length; i++) { if (!view[i].hidden) {
+    if (cm.options.fixedGutter) {
+      if (view[i].gutter)
+        { view[i].gutter.style.left = left }
+      if (view[i].gutterBackground)
+        { view[i].gutterBackground.style.left = left }
+    }
+    var align = view[i].alignable
+    if (align) { for (var j = 0; j < align.length; j++)
+      { align[j].style.left = left } }
+  } }
+  if (cm.options.fixedGutter)
+    { display.gutters.style.left = (comp + gutterW) + "px" }
+}
+
+// Used to ensure that the line number gutter is still the right
+// size for the current document size. Returns true when an update
+// is needed.
+function maybeUpdateLineNumberWidth(cm) {
+  if (!cm.options.lineNumbers) { return false }
+  var doc = cm.doc, last = lineNumberFor(cm.options, doc.first + doc.size - 1), display = cm.display
+  if (last.length != display.lineNumChars) {
+    var test = display.measure.appendChild(elt("div", [elt("div", last)],
+                                               "CodeMirror-linenumber CodeMirror-gutter-elt"))
+    var innerW = test.firstChild.offsetWidth, padding = test.offsetWidth - innerW
+    display.lineGutter.style.width = ""
+    display.lineNumInnerWidth = Math.max(innerW, display.lineGutter.offsetWidth - padding) + 1
+    display.lineNumWidth = display.lineNumInnerWidth + padding
+    display.lineNumChars = display.lineNumInnerWidth ? last.length : -1
+    display.lineGutter.style.width = display.lineNumWidth + "px"
+    updateGutterSpace(cm)
+    return true
+  }
+  return false
+}
+
+// SCROLLING THINGS INTO VIEW
+
+// If an editor sits on the top or bottom of the window, partially
+// scrolled out of view, this ensures that the cursor is visible.
+function maybeScrollWindow(cm, rect) {
+  if (signalDOMEvent(cm, "scrollCursorIntoView")) { return }
+
+  var display = cm.display, box = display.sizer.getBoundingClientRect(), doScroll = null
+  if (rect.top + box.top < 0) { doScroll = true }
+  else if (rect.bottom + box.top > (window.innerHeight || document.documentElement.clientHeight)) { doScroll = false }
+  if (doScroll != null && !phantom) {
+    var scrollNode = elt("div", "\u200b", null, ("position: absolute;\n                         top: " + (rect.top - display.viewOffset - paddingTop(cm.display)) + "px;\n                         height: " + (rect.bottom - rect.top + scrollGap(cm) + display.barHeight) + "px;\n                         left: " + (rect.left) + "px; width: " + (Math.max(2, rect.right - rect.left)) + "px;"))
+    cm.display.lineSpace.appendChild(scrollNode)
+    scrollNode.scrollIntoView(doScroll)
+    cm.display.lineSpace.removeChild(scrollNode)
+  }
+}
+
+// Scroll a given position into view (immediately), verifying that
+// it actually became visible (as line heights are accurately
+// measured, the position of something may 'drift' during drawing).
+function scrollPosIntoView(cm, pos, end, margin) {
+  if (margin == null) { margin = 0 }
+  var rect
+  if (!cm.options.lineWrapping && pos == end) {
+    // Set pos and end to the cursor positions around the character pos sticks to
+    // If pos.sticky == "before", that is around pos.ch - 1, otherwise around pos.ch
+    // If pos == Pos(_, 0, "before"), pos and end are unchanged
+    pos = pos.ch ? Pos(pos.line, pos.sticky == "before" ? pos.ch - 1 : pos.ch, "after") : pos
+    end = pos.sticky == "before" ? Pos(pos.line, pos.ch + 1, "before") : pos
+  }
+  for (var limit = 0; limit < 5; limit++) {
+    var changed = false
+    var coords = cursorCoords(cm, pos)
+    var endCoords = !end || end == pos ? coords : cursorCoords(cm, end)
+    rect = {left: Math.min(coords.left, endCoords.left),
+            top: Math.min(coords.top, endCoords.top) - margin,
+            right: Math.max(coords.left, endCoords.left),
+            bottom: Math.max(coords.bottom, endCoords.bottom) + margin}
+    var scrollPos = calculateScrollPos(cm, rect)
+    var startTop = cm.doc.scrollTop, startLeft = cm.doc.scrollLeft
+    if (scrollPos.scrollTop != null) {
+      updateScrollTop(cm, scrollPos.scrollTop)
+      if (Math.abs(cm.doc.scrollTop - startTop) > 1) { changed = true }
+    }
+    if (scrollPos.scrollLeft != null) {
+      setScrollLeft(cm, scrollPos.scrollLeft)
+      if (Math.abs(cm.doc.scrollLeft - startLeft) > 1) { changed = true }
+    }
+    if (!changed) { break }
+  }
+  return rect
+}
+
+// Scroll a given set of coordinates into view (immediately).
+function scrollIntoView(cm, rect) {
+  var scrollPos = calculateScrollPos(cm, rect)
+  if (scrollPos.scrollTop != null) { updateScrollTop(cm, scrollPos.scrollTop) }
+  if (scrollPos.scrollLeft != null) { setScrollLeft(cm, scrollPos.scrollLeft) }
+}
+
+// Calculate a new scroll position needed to scroll the given
+// rectangle into view. Returns an object with scrollTop and
+// scrollLeft properties. When these are undefined, the
+// vertical/horizontal position does not need to be adjusted.
+function calculateScrollPos(cm, rect) {
+  var display = cm.display, snapMargin = textHeight(cm.display)
+  if (rect.top < 0) { rect.top = 0 }
+  var screentop = cm.curOp && cm.curOp.scrollTop != null ? cm.curOp.scrollTop : display.scroller.scrollTop
+  var screen = displayHeight(cm), result = {}
+  if (rect.bottom - rect.top > screen) { rect.bottom = rect.top + screen }
+  var docBottom = cm.doc.height + paddingVert(display)
+  var atTop = rect.top < snapMargin, atBottom = rect.bottom > docBottom - snapMargin
+  if (rect.top < screentop) {
+    result.scrollTop = atTop ? 0 : rect.top
+  } else if (rect.bottom > screentop + screen) {
+    var newTop = Math.min(rect.top, (atBottom ? docBottom : rect.bottom) - screen)
+    if (newTop != screentop) { result.scrollTop = newTop }
+  }
+
+  var screenleft = cm.curOp && cm.curOp.scrollLeft != null ? cm.curOp.scrollLeft : display.scroller.scrollLeft
+  var screenw = displayWidth(cm) - (cm.options.fixedGutter ? display.gutters.offsetWidth : 0)
+  var tooWide = rect.right - rect.left > screenw
+  if (tooWide) { rect.right = rect.left + screenw }
+  if (rect.left < 10)
+    { result.scrollLeft = 0 }
+  else if (rect.left < screenleft)
+    { result.scrollLeft = Math.max(0, rect.left - (tooWide ? 0 : 10)) }
+  else if (rect.right > screenw + screenleft - 3)
+    { result.scrollLeft = rect.right + (tooWide ? 0 : 10) - screenw }
+  return result
+}
+
+// Store a relative adjustment to the scroll position in the current
+// operation (to be applied when the operation finishes).
+function addToScrollTop(cm, top) {
+  if (top == null) { return }
+  resolveScrollToPos(cm)
+  cm.curOp.scrollTop = (cm.curOp.scrollTop == null ? cm.doc.scrollTop : cm.curOp.scrollTop) + top
+}
+
+// Make sure that at the end of the operation the current cursor is
+// shown.
+function ensureCursorVisible(cm) {
+  resolveScrollToPos(cm)
+  var cur = cm.getCursor()
+  cm.curOp.scrollToPos = {from: cur, to: cur, margin: cm.options.cursorScrollMargin}
+}
+
+function scrollToCoords(cm, x, y) {
+  if (x != null || y != null) { resolveScrollToPos(cm) }
+  if (x != null) { cm.curOp.scrollLeft = x }
+  if (y != null) { cm.curOp.scrollTop = y }
+}
+
+function scrollToRange(cm, range) {
+  resolveScrollToPos(cm)
+  cm.curOp.scrollToPos = range
+}
+
+// When an operation has its scrollToPos property set, and another
+// scroll action is applied before the end of the operation, this
+// 'simulates' scrolling that position into view in a cheap way, so
+// that the effect of intermediate scroll commands is not ignored.
+function resolveScrollToPos(cm) {
+  var range = cm.curOp.scrollToPos
+  if (range) {
+    cm.curOp.scrollToPos = null
+    var from = estimateCoords(cm, range.from), to = estimateCoords(cm, range.to)
+    scrollToCoordsRange(cm, from, to, range.margin)
+  }
+}
+
+function scrollToCoordsRange(cm, from, to, margin) {
+  var sPos = calculateScrollPos(cm, {
+    left: Math.min(from.left, to.left),
+    top: Math.min(from.top, to.top) - margin,
+    right: Math.max(from.right, to.right),
+    bottom: Math.max(from.bottom, to.bottom) + margin
+  })
+  scrollToCoords(cm, sPos.scrollLeft, sPos.scrollTop)
+}
+
+// Sync the scrollable area and scrollbars, ensure the viewport
+// covers the visible area.
+function updateScrollTop(cm, val) {
+  if (Math.abs(cm.doc.scrollTop - val) < 2) { return }
+  if (!gecko) { updateDisplaySimple(cm, {top: val}) }
+  setScrollTop(cm, val, true)
+  if (gecko) { updateDisplaySimple(cm) }
+  startWorker(cm, 100)
+}
+
+function setScrollTop(cm, val, forceScroll) {
+  val = Math.min(cm.display.scroller.scrollHeight - cm.display.scroller.clientHeight, val)
+  if (cm.display.scroller.scrollTop == val && !forceScroll) { return }
+  cm.doc.scrollTop = val
+  cm.display.scrollbars.setScrollTop(val)
+  if (cm.display.scroller.scrollTop != val) { cm.display.scroller.scrollTop = val }
+}
+
+// Sync scroller and scrollbar, ensure the gutter elements are
+// aligned.
+function setScrollLeft(cm, val, isScroller, forceScroll) {
+  val = Math.min(val, cm.display.scroller.scrollWidth - cm.display.scroller.clientWidth)
+  if ((isScroller ? val == cm.doc.scrollLeft : Math.abs(cm.doc.scrollLeft - val) < 2) && !forceScroll) { return }
+  cm.doc.scrollLeft = val
+  alignHorizontally(cm)
+  if (cm.display.scroller.scrollLeft != val) { cm.display.scroller.scrollLeft = val }
+  cm.display.scrollbars.setScrollLeft(val)
+}
+
+// SCROLLBARS
+
+// Prepare DOM reads needed to update the scrollbars. Done in one
+// shot to minimize update/measure roundtrips.
+function measureForScrollbars(cm) {
+  var d = cm.display, gutterW = d.gutters.offsetWidth
+  var docH = Math.round(cm.doc.height + paddingVert(cm.display))
+  return {
+    clientHeight: d.scroller.clientHeight,
+    viewHeight: d.wrapper.clientHeight,
+    scrollWidth: d.scroller.scrollWidth, clientWidth: d.scroller.clientWidth,
+    viewWidth: d.wrapper.clientWidth,
+    barLeft: cm.options.fixedGutter ? gutterW : 0,
+    docHeight: docH,
+    scrollHeight: docH + scrollGap(cm) + d.barHeight,
+    nativeBarWidth: d.nativeBarWidth,
+    gutterWidth: gutterW
+  }
+}
+
+var NativeScrollbars = function(place, scroll, cm) {
+  this.cm = cm
+  var vert = this.vert = elt("div", [elt("div", null, null, "min-width: 1px")], "CodeMirror-vscrollbar")
+  var horiz = this.horiz = elt("div", [elt("div", null, null, "height: 100%; min-height: 1px")], "CodeMirror-hscrollbar")
+  place(vert); place(horiz)
+
+  on(vert, "scroll", function () {
+    if (vert.clientHeight) { scroll(vert.scrollTop, "vertical") }
+  })
+  on(horiz, "scroll", function () {
+    if (horiz.clientWidth) { scroll(horiz.scrollLeft, "horizontal") }
+  })
+
+  this.checkedZeroWidth = false
+  // Need to set a minimum width to see the scrollbar on IE7 (but must not set it on IE8).
+  if (ie && ie_version < 8) { this.horiz.style.minHeight = this.vert.style.minWidth = "18px" }
+};
+
+NativeScrollbars.prototype.update = function (measure) {
+  var needsH = measure.scrollWidth > measure.clientWidth + 1
+  var needsV = measure.scrollHeight > measure.clientHeight + 1
+  var sWidth = measure.nativeBarWidth
+
+  if (needsV) {
+    this.vert.style.display = "block"
+    this.vert.style.bottom = needsH ? sWidth + "px" : "0"
+    var totalHeight = measure.viewHeight - (needsH ? sWidth : 0)
+    // A bug in IE8 can cause this value to be negative, so guard it.
+    this.vert.firstChild.style.height =
+      Math.max(0, measure.scrollHeight - measure.clientHeight + totalHeight) + "px"
+  } else {
+    this.vert.style.display = ""
+    this.vert.firstChild.style.height = "0"
+  }
+
+  if (needsH) {
+    this.horiz.style.display = "block"
+    this.horiz.style.right = needsV ? sWidth + "px" : "0"
+    this.horiz.style.left = measure.barLeft + "px"
+    var totalWidth = measure.viewWidth - measure.barLeft - (needsV ? sWidth : 0)
+    this.horiz.firstChild.style.width =
+      Math.max(0, measure.scrollWidth - measure.clientWidth + totalWidth) + "px"
+  } else {
+    this.horiz.style.display = ""
+    this.horiz.firstChild.style.width = "0"
+  }
+
+  if (!this.checkedZeroWidth && measure.clientHeight > 0) {
+    if (sWidth == 0) { this.zeroWidthHack() }
+    this.checkedZeroWidth = true
+  }
+
+  return {right: needsV ? sWidth : 0, bottom: needsH ? sWidth : 0}
+};
+
+NativeScrollbars.prototype.setScrollLeft = function (pos) {
+  if (this.horiz.scrollLeft != pos) { this.horiz.scrollLeft = pos }
+  if (this.disableHoriz) { this.enableZeroWidthBar(this.horiz, this.disableHoriz, "horiz") }
+};
+
+NativeScrollbars.prototype.setScrollTop = function (pos) {
+  if (this.vert.scrollTop != pos) { this.vert.scrollTop = pos }
+  if (this.disableVert) { this.enableZeroWidthBar(this.vert, this.disableVert, "vert") }
+};
+
+NativeScrollbars.prototype.zeroWidthHack = function () {
+  var w = mac && !mac_geMountainLion ? "12px" : "18px"
+  this.horiz.style.height = this.vert.style.width = w
+  this.horiz.style.pointerEvents = this.vert.style.pointerEvents = "none"
+  this.disableHoriz = new Delayed
+  this.disableVert = new Delayed
+};
+
+NativeScrollbars.prototype.enableZeroWidthBar = function (bar, delay, type) {
+  bar.style.pointerEvents = "auto"
+  function maybeDisable() {
+    // To find out whether the scrollbar is still visible, we
+    // check whether the element under the pixel in the bottom
+    // right corner of the scrollbar box is the scrollbar box
+    // itself (when the bar is still visible) or its filler child
+    // (when the bar is hidden). If it is still visible, we keep
+    // it enabled, if it's hidden, we disable pointer events.
+    var box = bar.getBoundingClientRect()
+    var elt = type == "vert" ? document.elementFromPoint(box.right - 1, (box.top + box.bottom) / 2)
+        : document.elementFromPoint((box.right + box.left) / 2, box.bottom - 1)
+    if (elt != bar) { bar.style.pointerEvents = "none" }
+    else { delay.set(1000, maybeDisable) }
+  }
+  delay.set(1000, maybeDisable)
+};
+
+NativeScrollbars.prototype.clear = function () {
+  var parent = this.horiz.parentNode
+  parent.removeChild(this.horiz)
+  parent.removeChild(this.vert)
+};
+
+var NullScrollbars = function () {};
+
+NullScrollbars.prototype.update = function () { return {bottom: 0, right: 0} };
+NullScrollbars.prototype.setScrollLeft = function () {};
+NullScrollbars.prototype.setScrollTop = function () {};
+NullScrollbars.prototype.clear = function () {};
+
+function updateScrollbars(cm, measure) {
+  if (!measure) { measure = measureForScrollbars(cm) }
+  var startWidth = cm.display.barWidth, startHeight = cm.display.barHeight
+  updateScrollbarsInner(cm, measure)
+  for (var i = 0; i < 4 && startWidth != cm.display.barWidth || startHeight != cm.display.barHeight; i++) {
+    if (startWidth != cm.display.barWidth && cm.options.lineWrapping)
+      { updateHeightsInViewport(cm) }
+    updateScrollbarsInner(cm, measureForScrollbars(cm))
+    startWidth = cm.display.barWidth; startHeight = cm.display.barHeight
+  }
+}
+
+// Re-synchronize the fake scrollbars with the actual size of the
+// content.
+function updateScrollbarsInner(cm, measure) {
+  var d = cm.display
+  var sizes = d.scrollbars.update(measure)
+
+  d.sizer.style.paddingRight = (d.barWidth = sizes.right) + "px"
+  d.sizer.style.paddingBottom = (d.barHeight = sizes.bottom) + "px"
+  d.heightForcer.style.borderBottom = sizes.bottom + "px solid transparent"
+
+  if (sizes.right && sizes.bottom) {
+    d.scrollbarFiller.style.display = "block"
+    d.scrollbarFiller.style.height = sizes.bottom + "px"
+    d.scrollbarFiller.style.width = sizes.right + "px"
+  } else { d.scrollbarFiller.style.display = "" }
+  if (sizes.bottom && cm.options.coverGutterNextToScrollbar && cm.options.fixedGutter) {
+    d.gutterFiller.style.display = "block"
+    d.gutterFiller.style.height = sizes.bottom + "px"
+    d.gutterFiller.style.width = measure.gutterWidth + "px"
+  } else { d.gutterFiller.style.display = "" }
+}
+
+var scrollbarModel = {"native": NativeScrollbars, "null": NullScrollbars}
+
+function initScrollbars(cm) {
+  if (cm.display.scrollbars) {
+    cm.display.scrollbars.clear()
+    if (cm.display.scrollbars.addClass)
+      { rmClass(cm.display.wrapper, cm.display.scrollbars.addClass) }
+  }
+
+  cm.display.scrollbars = new scrollbarModel[cm.options.scrollbarStyle](function (node) {
+    cm.display.wrapper.insertBefore(node, cm.display.scrollbarFiller)
+    // Prevent clicks in the scrollbars from killing focus
+    on(node, "mousedown", function () {
+      if (cm.state.focused) { setTimeout(function () { return cm.display.input.focus(); }, 0) }
+    })
+    node.setAttribute("cm-not-content", "true")
+  }, function (pos, axis) {
+    if (axis == "horizontal") { setScrollLeft(cm, pos) }
+    else { updateScrollTop(cm, pos) }
+  }, cm)
+  if (cm.display.scrollbars.addClass)
+    { addClass(cm.display.wrapper, cm.display.scrollbars.addClass) }
+}
+
+// Operations are used to wrap a series of changes to the editor
+// state in such a way that each change won't have to update the
+// cursor and display (which would be awkward, slow, and
+// error-prone). Instead, display updates are batched and then all
+// combined and executed at once.
+
+var nextOpId = 0
+// Start a new operation.
+function startOperation(cm) {
+  cm.curOp = {
+    cm: cm,
+    viewChanged: false,      // Flag that indicates that lines might need to be redrawn
+    startHeight: cm.doc.height, // Used to detect need to update scrollbar
+    forceUpdate: false,      // Used to force a redraw
+    updateInput: null,       // Whether to reset the input textarea
+    typing: false,           // Whether this reset should be careful to leave existing text (for compositing)
+    changeObjs: null,        // Accumulated changes, for firing change events
+    cursorActivityHandlers: null, // Set of handlers to fire cursorActivity on
+    cursorActivityCalled: 0, // Tracks which cursorActivity handlers have been called already
+    selectionChanged: false, // Whether the selection needs to be redrawn
+    updateMaxLine: false,    // Set when the widest line needs to be determined anew
+    scrollLeft: null, scrollTop: null, // Intermediate scroll position, not pushed to DOM yet
+    scrollToPos: null,       // Used to scroll to a specific position
+    focus: false,
+    id: ++nextOpId           // Unique ID
+  }
+  pushOperation(cm.curOp)
+}
+
+// Finish an operation, updating the display and signalling delayed events
+function endOperation(cm) {
+  var op = cm.curOp
+  finishOperation(op, function (group) {
+    for (var i = 0; i < group.ops.length; i++)
+      { group.ops[i].cm.curOp = null }
+    endOperations(group)
+  })
+}
+
+// The DOM updates done when an operation finishes are batched so
+// that the minimum number of relayouts are required.
+function endOperations(group) {
+  var ops = group.ops
+  for (var i = 0; i < ops.length; i++) // Read DOM
+    { endOperation_R1(ops[i]) }
+  for (var i$1 = 0; i$1 < ops.length; i$1++) // Write DOM (maybe)
+    { endOperation_W1(ops[i$1]) }
+  for (var i$2 = 0; i$2 < ops.length; i$2++) // Read DOM
+    { endOperation_R2(ops[i$2]) }
+  for (var i$3 = 0; i$3 < ops.length; i$3++) // Write DOM (maybe)
+    { endOperation_W2(ops[i$3]) }
+  for (var i$4 = 0; i$4 < ops.length; i$4++) // Read DOM
+    { endOperation_finish(ops[i$4]) }
+}
+
+function endOperation_R1(op) {
+  var cm = op.cm, display = cm.display
+  maybeClipScrollbars(cm)
+  if (op.updateMaxLine) { findMaxLine(cm) }
+
+  op.mustUpdate = op.viewChanged || op.forceUpdate || op.scrollTop != null ||
+    op.scrollToPos && (op.scrollToPos.from.line < display.viewFrom ||
+                       op.scrollToPos.to.line >= display.viewTo) ||
+    display.maxLineChanged && cm.options.lineWrapping
+  op.update = op.mustUpdate &&
+    new DisplayUpdate(cm, op.mustUpdate && {top: op.scrollTop, ensure: op.scrollToPos}, op.forceUpdate)
+}
+
+function endOperation_W1(op) {
+  op.updatedDisplay = op.mustUpdate && updateDisplayIfNeeded(op.cm, op.update)
+}
+
+function endOperation_R2(op) {
+  var cm = op.cm, display = cm.display
+  if (op.updatedDisplay) { updateHeightsInViewport(cm) }
+
+  op.barMeasure = measureForScrollbars(cm)
+
+  // If the max line changed since it was last measured, measure it,
+  // and ensure the document's width matches it.
+  // updateDisplay_W2 will use these properties to do the actual resizing
+  if (display.maxLineChanged && !cm.options.lineWrapping) {
+    op.adjustWidthTo = measureChar(cm, display.maxLine, display.maxLine.text.length).left + 3
+    cm.display.sizerWidth = op.adjustWidthTo
+    op.barMeasure.scrollWidth =
+      Math.max(display.scroller.clientWidth, display.sizer.offsetLeft + op.adjustWidthTo + scrollGap(cm) + cm.display.barWidth)
+    op.maxScrollLeft = Math.max(0, display.sizer.offsetLeft + op.adjustWidthTo - displayWidth(cm))
+  }
+
+  if (op.updatedDisplay || op.selectionChanged)
+    { op.preparedSelection = display.input.prepareSelection() }
+}
+
+function endOperation_W2(op) {
+  var cm = op.cm
+
+  if (op.adjustWidthTo != null) {
+    cm.display.sizer.style.minWidth = op.adjustWidthTo + "px"
+    if (op.maxScrollLeft < cm.doc.scrollLeft)
+      { setScrollLeft(cm, Math.min(cm.display.scroller.scrollLeft, op.maxScrollLeft), true) }
+    cm.display.maxLineChanged = false
+  }
+
+  var takeFocus = op.focus && op.focus == activeElt()
+  if (op.preparedSelection)
+    { cm.display.input.showSelection(op.preparedSelection, takeFocus) }
+  if (op.updatedDisplay || op.startHeight != cm.doc.height)
+    { updateScrollbars(cm, op.barMeasure) }
+  if (op.updatedDisplay)
+    { setDocumentHeight(cm, op.barMeasure) }
+
+  if (op.selectionChanged) { restartBlink(cm) }
+
+  if (cm.state.focused && op.updateInput)
+    { cm.display.input.reset(op.typing) }
+  if (takeFocus) { ensureFocus(op.cm) }
+}
+
+function endOperation_finish(op) {
+  var cm = op.cm, display = cm.display, doc = cm.doc
+
+  if (op.updatedDisplay) { postUpdateDisplay(cm, op.update) }
+
+  // Abort mouse wheel delta measurement, when scrolling explicitly
+  if (display.wheelStartX != null && (op.scrollTop != null || op.scrollLeft != null || op.scrollToPos))
+    { display.wheelStartX = display.wheelStartY = null }
+
+  // Propagate the scroll position to the actual DOM scroller
+  if (op.scrollTop != null) { setScrollTop(cm, op.scrollTop, op.forceScroll) }
+
+  if (op.scrollLeft != null) { setScrollLeft(cm, op.scrollLeft, true, true) }
+  // If we need to scroll a specific position into view, do so.
+  if (op.scrollToPos) {
+    var rect = scrollPosIntoView(cm, clipPos(doc, op.scrollToPos.from),
+                                 clipPos(doc, op.scrollToPos.to), op.scrollToPos.margin)
+    maybeScrollWindow(cm, rect)
+  }
+
+  // Fire events for markers that are hidden/unidden by editing or
+  // undoing
+  var hidden = op.maybeHiddenMarkers, unhidden = op.maybeUnhiddenMarkers
+  if (hidden) { for (var i = 0; i < hidden.length; ++i)
+    { if (!hidden[i].lines.length) { signal(hidden[i], "hide") } } }
+  if (unhidden) { for (var i$1 = 0; i$1 < unhidden.length; ++i$1)
+    { if (unhidden[i$1].lines.length) { signal(unhidden[i$1], "unhide") } } }
+
+  if (display.wrapper.offsetHeight)
+    { doc.scrollTop = cm.display.scroller.scrollTop }
+
+  // Fire change events, and delayed event handlers
+  if (op.changeObjs)
+    { signal(cm, "changes", cm, op.changeObjs) }
+  if (op.update)
+    { op.update.finish() }
+}
+
+// Run the given function in an operation
+function runInOp(cm, f) {
+  if (cm.curOp) { return f() }
+  startOperation(cm)
+  try { return f() }
+  finally { endOperation(cm) }
+}
+// Wraps a function in an operation. Returns the wrapped function.
+function operation(cm, f) {
+  return function() {
+    if (cm.curOp) { return f.apply(cm, arguments) }
+    startOperation(cm)
+    try { return f.apply(cm, arguments) }
+    finally { endOperation(cm) }
+  }
+}
+// Used to add methods to editor and doc instances, wrapping them in
+// operations.
+function methodOp(f) {
+  return function() {
+    if (this.curOp) { return f.apply(this, arguments) }
+    startOperation(this)
+    try { return f.apply(this, arguments) }
+    finally { endOperation(this) }
+  }
+}
+function docMethodOp(f) {
+  return function() {
+    var cm = this.cm
+    if (!cm || cm.curOp) { return f.apply(this, arguments) }
+    startOperation(cm)
+    try { return f.apply(this, arguments) }
+    finally { endOperation(cm) }
+  }
+}
+
+// Updates the display.view data structure for a given change to the
+// document. From and to are in pre-change coordinates. Lendiff is
+// the amount of lines added or subtracted by the change. This is
+// used for changes that span multiple lines, or change the way
+// lines are divided into visual lines. regLineChange (below)
+// registers single-line changes.
+function regChange(cm, from, to, lendiff) {
+  if (from == null) { from = cm.doc.first }
+  if (to == null) { to = cm.doc.first + cm.doc.size }
+  if (!lendiff) { lendiff = 0 }
+
+  var display = cm.display
+  if (lendiff && to < display.viewTo &&
+      (display.updateLineNumbers == null || display.updateLineNumbers > from))
+    { display.updateLineNumbers = from }
+
+  cm.curOp.viewChanged = true
+
+  if (from >= display.viewTo) { // Change after
+    if (sawCollapsedSpans && visualLineNo(cm.doc, from) < display.viewTo)
+      { resetView(cm) }
+  } else if (to <= display.viewFrom) { // Change before
+    if (sawCollapsedSpans && visualLineEndNo(cm.doc, to + lendiff) > display.viewFrom) {
+      resetView(cm)
+    } else {
+      display.viewFrom += lendiff
+      display.viewTo += lendiff
+    }
+  } else if (from <= display.viewFrom && to >= display.viewTo) { // Full overlap
+    resetView(cm)
+  } else if (from <= display.viewFrom) { // Top overlap
+    var cut = viewCuttingPoint(cm, to, to + lendiff, 1)
+    if (cut) {
+      display.view = display.view.slice(cut.index)
+      display.viewFrom = cut.lineN
+      display.viewTo += lendiff
+    } else {
+      resetView(cm)
+    }
+  } else if (to >= display.viewTo) { // Bottom overlap
+    var cut$1 = viewCuttingPoint(cm, from, from, -1)
+    if (cut$1) {
+      display.view = display.view.slice(0, cut$1.index)
+      display.viewTo = cut$1.lineN
+    } else {
+      resetView(cm)
+    }
+  } else { // Gap in the middle
+    var cutTop = viewCuttingPoint(cm, from, from, -1)
+    var cutBot = viewCuttingPoint(cm, to, to + lendiff, 1)
+    if (cutTop && cutBot) {
+      display.view = display.view.slice(0, cutTop.index)
+        .concat(buildViewArray(cm, cutTop.lineN, cutBot.lineN))
+        .concat(display.view.slice(cutBot.index))
+      display.viewTo += lendiff
+    } else {
+      resetView(cm)
+    }
+  }
+
+  var ext = display.externalMeasured
+  if (ext) {
+    if (to < ext.lineN)
+      { ext.lineN += lendiff }
+    else if (from < ext.lineN + ext.size)
+      { display.externalMeasured = null }
+  }
+}
+
+// Register a change to a single line. Type must be one of "text",
+// "gutter", "class", "widget"
+function regLineChange(cm, line, type) {
+  cm.curOp.viewChanged = true
+  var display = cm.display, ext = cm.display.externalMeasured
+  if (ext && line >= ext.lineN && line < ext.lineN + ext.size)
+    { display.externalMeasured = null }
+
+  if (line < display.viewFrom || line >= display.viewTo) { return }
+  var lineView = display.view[findViewIndex(cm, line)]
+  if (lineView.node == null) { return }
+  var arr = lineView.changes || (lineView.changes = [])
+  if (indexOf(arr, type) == -1) { arr.push(type) }
+}
+
+// Clear the view.
+function resetView(cm) {
+  cm.display.viewFrom = cm.display.viewTo = cm.doc.first
+  cm.display.view = []
+  cm.display.viewOffset = 0
+}
+
+function viewCuttingPoint(cm, oldN, newN, dir) {
+  var index = findViewIndex(cm, oldN), diff, view = cm.display.view
+  if (!sawCollapsedSpans || newN == cm.doc.first + cm.doc.size)
+    { return {index: index, lineN: newN} }
+  var n = cm.display.viewFrom
+  for (var i = 0; i < index; i++)
+    { n += view[i].size }
+  if (n != oldN) {
+    if (dir > 0) {
+      if (index == view.length - 1) { return null }
+      diff = (n + view[index].size) - oldN
+      index++
+    } else {
+      diff = n - oldN
+    }
+    oldN += diff; newN += diff
+  }
+  while (visualLineNo(cm.doc, newN) != newN) {
+    if (index == (dir < 0 ? 0 : view.length - 1)) { return null }
+    newN += dir * view[index - (dir < 0 ? 1 : 0)].size
+    index += dir
+  }
+  return {index: index, lineN: newN}
+}
+
+// Force the view to cover a given range, adding empty view element
+// or clipping off existing ones as needed.
+function adjustView(cm, from, to) {
+  var display = cm.display, view = display.view
+  if (view.length == 0 || from >= display.viewTo || to <= display.viewFrom) {
+    display.view = buildViewArray(cm, from, to)
+    display.viewFrom = from
+  } else {
+    if (display.viewFrom > from)
+      { display.view = buildViewArray(cm, from, display.viewFrom).concat(display.view) }
+    else if (display.viewFrom < from)
+      { display.view = display.view.slice(findViewIndex(cm, from)) }
+    display.viewFrom = from
+    if (display.viewTo < to)
+      { display.view = display.view.concat(buildViewArray(cm, display.viewTo, to)) }
+    else if (display.viewTo > to)
+      { display.view = display.view.slice(0, findViewIndex(cm, to)) }
+  }
+  display.viewTo = to
+}
+
+// Count the number of lines in the view whose DOM representation is
+// out of date (or nonexistent).
+function countDirtyView(cm) {
+  var view = cm.display.view, dirty = 0
+  for (var i = 0; i < view.length; i++) {
+    var lineView = view[i]
+    if (!lineView.hidden && (!lineView.node || lineView.changes)) { ++dirty }
+  }
+  return dirty
+}
+
+// HIGHLIGHT WORKER
+
+function startWorker(cm, time) {
+  if (cm.doc.highlightFrontier < cm.display.viewTo)
+    { cm.state.highlight.set(time, bind(highlightWorker, cm)) }
+}
+
+function highlightWorker(cm) {
+  var doc = cm.doc
+  if (doc.highlightFrontier >= cm.display.viewTo) { return }
+  var end = +new Date + cm.options.workTime
+  var context = getContextBefore(cm, doc.highlightFrontier)
+  var changedLines = []
+
+  doc.iter(context.line, Math.min(doc.first + doc.size, cm.display.viewTo + 500), function (line) {
+    if (context.line >= cm.display.viewFrom) { // Visible
+      var oldStyles = line.styles
+      var resetState = line.text.length > cm.options.maxHighlightLength ? copyState(doc.mode, context.state) : null
+      var highlighted = highlightLine(cm, line, context, true)
+      if (resetState) { context.state = resetState }
+      line.styles = highlighted.styles
+      var oldCls = line.styleClasses, newCls = highlighted.classes
+      if (newCls) { line.styleClasses = newCls }
+      else if (oldCls) { line.styleClasses = null }
+      var ischange = !oldStyles || oldStyles.length != line.styles.length ||
+        oldCls != newCls && (!oldCls || !newCls || oldCls.bgClass != newCls.bgClass || oldCls.textClass != newCls.textClass)
+      for (var i = 0; !ischange && i < oldStyles.length; ++i) { ischange = oldStyles[i] != line.styles[i] }
+      if (ischange) { changedLines.push(context.line) }
+      line.stateAfter = context.save()
+      context.nextLine()
+    } else {
+      if (line.text.length <= cm.options.maxHighlightLength)
+        { processLine(cm, line.text, context) }
+      line.stateAfter = context.line % 5 == 0 ? context.save() : null
+      context.nextLine()
+    }
+    if (+new Date > end) {
+      startWorker(cm, cm.options.workDelay)
+      return true
+    }
+  })
+  doc.highlightFrontier = context.line
+  doc.modeFrontier = Math.max(doc.modeFrontier, context.line)
+  if (changedLines.length) { runInOp(cm, function () {
+    for (var i = 0; i < changedLines.length; i++)
+      { regLineChange(cm, changedLines[i], "text") }
+  }) }
+}
+
+// DISPLAY DRAWING
+
+var DisplayUpdate = function(cm, viewport, force) {
+  var display = cm.display
+
+  this.viewport = viewport
+  // Store some values that we'll need later (but don't want to force a relayout for)
+  this.visible = visibleLines(display, cm.doc, viewport)
+  this.editorIsHidden = !display.wrapper.offsetWidth
+  this.wrapperHeight = display.wrapper.clientHeight
+  this.wrapperWidth = display.wrapper.clientWidth
+  this.oldDisplayWidth = displayWidth(cm)
+  this.force = force
+  this.dims = getDimensions(cm)
+  this.events = []
+};
+
+DisplayUpdate.prototype.signal = function (emitter, type) {
+  if (hasHandler(emitter, type))
+    { this.events.push(arguments) }
+};
+DisplayUpdate.prototype.finish = function () {
+    var this$1 = this;
+
+  for (var i = 0; i < this.events.length; i++)
+    { signal.apply(null, this$1.events[i]) }
+};
+
+function maybeClipScrollbars(cm) {
+  var display = cm.display
+  if (!display.scrollbarsClipped && display.scroller.offsetWidth) {
+    display.nativeBarWidth = display.scroller.offsetWidth - display.scroller.clientWidth
+    display.heightForcer.style.height = scrollGap(cm) + "px"
+    display.sizer.style.marginBottom = -display.nativeBarWidth + "px"
+    display.sizer.style.borderRightWidth = scrollGap(cm) + "px"
+    display.scrollbarsClipped = true
+  }
+}
+
+function selectionSnapshot(cm) {
+  if (cm.hasFocus()) { return null }
+  var active = activeElt()
+  if (!active || !contains(cm.display.lineDiv, active)) { return null }
+  var result = {activeElt: active}
+  if (window.getSelection) {
+    var sel = window.getSelection()
+    if (sel.anchorNode && sel.extend && contains(cm.display.lineDiv, sel.anchorNode)) {
+      result.anchorNode = sel.anchorNode
+      result.anchorOffset = sel.anchorOffset
+      result.focusNode = sel.focusNode
+      result.focusOffset = sel.focusOffset
+    }
+  }
+  return result
+}
+
+function restoreSelection(snapshot) {
+  if (!snapshot || !snapshot.activeElt || snapshot.activeElt == activeElt()) { return }
+  snapshot.activeElt.focus()
+  if (snapshot.anchorNode && contains(document.body, snapshot.anchorNode) && contains(document.body, snapshot.focusNode)) {
+    var sel = window.getSelection(), range = document.createRange()
+    range.setEnd(snapshot.anchorNode, snapshot.anchorOffset)
+    range.collapse(false)
+    sel.removeAllRanges()
+    sel.addRange(range)
+    sel.extend(snapshot.focusNode, snapshot.focusOffset)
+  }
+}
+
+// Does the actual updating of the line display. Bails out
+// (returning false) when there is nothing to be done and forced is
+// false.
+function updateDisplayIfNeeded(cm, update) {
+  var display = cm.display, doc = cm.doc
+
+  if (update.editorIsHidden) {
+    resetView(cm)
+    return false
+  }
+
+  // Bail out if the visible area is already rendered and nothing changed.
+  if (!update.force &&
+      update.visible.from >= display.viewFrom && update.visible.to <= display.viewTo &&
+      (display.updateLineNumbers == null || display.updateLineNumbers >= display.viewTo) &&
+      display.renderedView == display.view && countDirtyView(cm) == 0)
+    { return false }
+
+  if (maybeUpdateLineNumberWidth(cm)) {
+    resetView(cm)
+    update.dims = getDimensions(cm)
+  }
+
+  // Compute a suitable new viewport (from & to)
+  var end = doc.first + doc.size
+  var from = Math.max(update.visible.from - cm.options.viewportMargin, doc.first)
+  var to = Math.min(end, update.visible.to + cm.options.viewportMargin)
+  if (display.viewFrom < from && from - display.viewFrom < 20) { from = Math.max(doc.first, display.viewFrom) }
+  if (display.viewTo > to && display.viewTo - to < 20) { to = Math.min(end, display.viewTo) }
+  if (sawCollapsedSpans) {
+    from = visualLineNo(cm.doc, from)
+    to = visualLineEndNo(cm.doc, to)
+  }
+
+  var different = from != display.viewFrom || to != display.viewTo ||
+    display.lastWrapHeight != update.wrapperHeight || display.lastWrapWidth != update.wrapperWidth
+  adjustView(cm, from, to)
+
+  display.viewOffset = heightAtLine(getLine(cm.doc, display.viewFrom))
+  // Position the mover div to align with the current scroll position
+  cm.display.mover.style.top = display.viewOffset + "px"
+
+  var toUpdate = countDirtyView(cm)
+  if (!different && toUpdate == 0 && !update.force && display.renderedView == display.view &&
+      (display.updateLineNumbers == null || display.updateLineNumbers >= display.viewTo))
+    { return false }
+
+  // For big changes, we hide the enclosing element during the
+  // update, since that speeds up the operations on most browsers.
+  var selSnapshot = selectionSnapshot(cm)
+  if (toUpdate > 4) { display.lineDiv.style.display = "none" }
+  patchDisplay(cm, display.updateLineNumbers, update.dims)
+  if (toUpdate > 4) { display.lineDiv.style.display = "" }
+  display.renderedView = display.view
+  // There might have been a widget with a focused element that got
+  // hidden or updated, if so re-focus it.
+  restoreSelection(selSnapshot)
+
+  // Prevent selection and cursors from interfering with the scroll
+  // width and height.
+  removeChildren(display.cursorDiv)
+  removeChildren(display.selectionDiv)
+  display.gutters.style.height = display.sizer.style.minHeight = 0
+
+  if (different) {
+    display.lastWrapHeight = update.wrapperHeight
+    display.lastWrapWidth = update.wrapperWidth
+    startWorker(cm, 400)
+  }
+
+  display.updateLineNumbers = null
+
+  return true
+}
+
+function postUpdateDisplay(cm, update) {
+  var viewport = update.viewport
+
+  for (var first = true;; first = false) {
+    if (!first || !cm.options.lineWrapping || update.oldDisplayWidth == displayWidth(cm)) {
+      // Clip forced viewport to actual scrollable area.
+      if (viewport && viewport.top != null)
+        { viewport = {top: Math.min(cm.doc.height + paddingVert(cm.display) - displayHeight(cm), viewport.top)} }
+      // Updated line heights might result in the drawn area not
+      // actually covering the viewport. Keep looping until it does.
+      update.visible = visibleLines(cm.display, cm.doc, viewport)
+      if (update.visible.from >= cm.display.viewFrom && update.visible.to <= cm.display.viewTo)
+        { break }
+    }
+    if (!updateDisplayIfNeeded(cm, update)) { break }
+    updateHeightsInViewport(cm)
+    var barMeasure = measureForScrollbars(cm)
+    updateSelection(cm)
+    updateScrollbars(cm, barMeasure)
+    setDocumentHeight(cm, barMeasure)
+    update.force = false
+  }
+
+  update.signal(cm, "update", cm)
+  if (cm.display.viewFrom != cm.display.reportedViewFrom || cm.display.viewTo != cm.display.reportedViewTo) {
+    update.signal(cm, "viewportChange", cm, cm.display.viewFrom, cm.display.viewTo)
+    cm.display.reportedViewFrom = cm.display.viewFrom; cm.display.reportedViewTo = cm.display.viewTo
+  }
+}
+
+function updateDisplaySimple(cm, viewport) {
+  var update = new DisplayUpdate(cm, viewport)
+  if (updateDisplayIfNeeded(cm, update)) {
+    updateHeightsInViewport(cm)
+    postUpdateDisplay(cm, update)
+    var barMeasure = measureForScrollbars(cm)
+    updateSelection(cm)
+    updateScrollbars(cm, barMeasure)
+    setDocumentHeight(cm, barMeasure)
+    update.finish()
+  }
+}
+
+// Sync the actual display DOM structure with display.view, removing
+// nodes for lines that are no longer in view, and creating the ones
+// that are not there yet, and updating the ones that are out of
+// date.
+function patchDisplay(cm, updateNumbersFrom, dims) {
+  var display = cm.display, lineNumbers = cm.options.lineNumbers
+  var container = display.lineDiv, cur = container.firstChild
+
+  function rm(node) {
+    var next = node.nextSibling
+    // Works around a throw-scroll bug in OS X Webkit
+    if (webkit && mac && cm.display.currentWheelTarget == node)
+      { node.style.display = "none" }
+    else
+      { node.parentNode.removeChild(node) }
+    return next
+  }
+
+  var view = display.view, lineN = display.viewFrom
+  // Loop over the elements in the view, syncing cur (the DOM nodes
+  // in display.lineDiv) with the view as we go.
+  for (var i = 0; i < view.length; i++) {
+    var lineView = view[i]
+    if (lineView.hidden) {
+    } else if (!lineView.node || lineView.node.parentNode != container) { // Not drawn yet
+      var node = buildLineElement(cm, lineView, lineN, dims)
+      container.insertBefore(node, cur)
+    } else { // Already drawn
+      while (cur != lineView.node) { cur = rm(cur) }
+      var updateNumber = lineNumbers && updateNumbersFrom != null &&
+        updateNumbersFrom <= lineN && lineView.lineNumber
+      if (lineView.changes) {
+        if (indexOf(lineView.changes, "gutter") > -1) { updateNumber = false }
+        updateLineForChanges(cm, lineView, lineN, dims)
+      }
+      if (updateNumber) {
+        removeChildren(lineView.lineNumber)
+        lineView.lineNumber.appendChild(document.createTextNode(lineNumberFor(cm.options, lineN)))
+      }
+      cur = lineView.node.nextSibling
+    }
+    lineN += lineView.size
+  }
+  while (cur) { cur = rm(cur) }
+}
+
+function updateGutterSpace(cm) {
+  var width = cm.display.gutters.offsetWidth
+  cm.display.sizer.style.marginLeft = width + "px"
+}
+
+function setDocumentHeight(cm, measure) {
+  cm.display.sizer.style.minHeight = measure.docHeight + "px"
+  cm.display.heightForcer.style.top = measure.docHeight + "px"
+  cm.display.gutters.style.height = (measure.docHeight + cm.display.barHeight + scrollGap(cm)) + "px"
+}
+
+// Rebuild the gutter elements, ensure the margin to the left of the
+// code matches their width.
+function updateGutters(cm) {
+  var gutters = cm.display.gutters, specs = cm.options.gutters
+  removeChildren(gutters)
+  var i = 0
+  for (; i < specs.length; ++i) {
+    var gutterClass = specs[i]
+    var gElt = gutters.appendChild(elt("div", null, "CodeMirror-gutter " + gutterClass))
+    if (gutterClass == "CodeMirror-linenumbers") {
+      cm.display.lineGutter = gElt
+      gElt.style.width = (cm.display.lineNumWidth || 1) + "px"
+    }
+  }
+  gutters.style.display = i ? "" : "none"
+  updateGutterSpace(cm)
+}
+
+// Make sure the gutters options contains the element
+// "CodeMirror-linenumbers" when the lineNumbers option is true.
+function setGuttersForLineNumbers(options) {
+  var found = indexOf(options.gutters, "CodeMirror-linenumbers")
+  if (found == -1 && options.lineNumbers) {
+    options.gutters = options.gutters.concat(["CodeMirror-linenumbers"])
+  } else if (found > -1 && !options.lineNumbers) {
+    options.gutters = options.gutters.slice(0)
+    options.gutters.splice(found, 1)
+  }
+}
+
+var wheelSamples = 0;
+var wheelPixelsPerUnit = null;
+// Fill in a browser-detected starting value on browsers where we
+// know one. These don't have to be accurate -- the result of them
+// being wrong would just be a slight flicker on the first wheel
+// scroll (if it is large enough).
+if (ie) { wheelPixelsPerUnit = -.53 }
+else if (gecko) { wheelPixelsPerUnit = 15 }
+else if (chrome) { wheelPixelsPerUnit = -.7 }
+else if (safari) { wheelPixelsPerUnit = -1/3 }
+
+function wheelEventDelta(e) {
+  var dx = e.wheelDeltaX, dy = e.wheelDeltaY
+  if (dx == null && e.detail && e.axis == e.HORIZONTAL_AXIS) { dx = e.detail }
+  if (dy == null && e.detail && e.axis == e.VERTICAL_AXIS) { dy = e.detail }
+  else if (dy == null) { dy = e.wheelDelta }
+  return {x: dx, y: dy}
+}
+function wheelEventPixels(e) {
+  var delta = wheelEventDelta(e)
+  delta.x *= wheelPixelsPerUnit
+  delta.y *= wheelPixelsPerUnit
+  return delta
+}
+
+function onScrollWheel(cm, e) {
+  var delta = wheelEventDelta(e), dx = delta.x, dy = delta.y
+
+  var display = cm.display, scroll = display.scroller
+  // Quit if there's nothing to scroll here
+  var canScrollX = scroll.scrollWidth > scroll.clientWidth
+  var canScrollY = scroll.scrollHeight > scroll.clientHeight
+  if (!(dx && canScrollX || dy && canScrollY)) { return }
+
+  // Webkit browsers on OS X abort momentum scrolls when the target
+  // of the scroll event is removed from the scrollable element.
+  // This hack (see related code in patchDisplay) makes sure the
+  // element is kept around.
+  if (dy && mac && webkit) {
+    outer: for (var cur = e.target, view = display.view; cur != scroll; cur = cur.parentNode) {
+      for (var i = 0; i < view.length; i++) {
+        if (view[i].node == cur) {
+          cm.display.currentWheelTarget = cur
+          break outer
+        }
+      }
+    }
+  }
+
+  // On some browsers, horizontal scrolling will cause redraws to
+  // happen before the gutter has been realigned, causing it to
+  // wriggle around in a most unseemly way. When we have an
+  // estimated pixels/delta value, we just handle horizontal
+  // scrolling entirely here. It'll be slightly off from native, but
+  // better than glitching out.
+  if (dx && !gecko && !presto && wheelPixelsPerUnit != null) {
+    if (dy && canScrollY)
+      { updateScrollTop(cm, Math.max(0, scroll.scrollTop + dy * wheelPixelsPerUnit)) }
+    setScrollLeft(cm, Math.max(0, scroll.scrollLeft + dx * wheelPixelsPerUnit))
+    // Only prevent default scrolling if vertical scrolling is
+    // actually possible. Otherwise, it causes vertical scroll
+    // jitter on OSX trackpads when deltaX is small and deltaY
+    // is large (issue #3579)
+    if (!dy || (dy && canScrollY))
+      { e_preventDefault(e) }
+    display.wheelStartX = null // Abort measurement, if in progress
+    return
+  }
+
+  // 'Project' the visible viewport to cover the area that is being
+  // scrolled into view (if we know enough to estimate it).
+  if (dy && wheelPixelsPerUnit != null) {
+    var pixels = dy * wheelPixelsPerUnit
+    var top = cm.doc.scrollTop, bot = top + display.wrapper.clientHeight
+    if (pixels < 0) { top = Math.max(0, top + pixels - 50) }
+    else { bot = Math.min(cm.doc.height, bot + pixels + 50) }
+    updateDisplaySimple(cm, {top: top, bottom: bot})
+  }
+
+  if (wheelSamples < 20) {
+    if (display.wheelStartX == null) {
+      display.wheelStartX = scroll.scrollLeft; display.wheelStartY = scroll.scrollTop
+      display.wheelDX = dx; display.wheelDY = dy
+      setTimeout(function () {
+        if (display.wheelStartX == null) { return }
+        var movedX = scroll.scrollLeft - display.wheelStartX
+        var movedY = scroll.scrollTop - display.wheelStartY
+        var sample = (movedY && display.wheelDY && movedY / display.wheelDY) ||
+          (movedX && display.wheelDX && movedX / display.wheelDX)
+        display.wheelStartX = display.wheelStartY = null
+        if (!sample) { return }
+        wheelPixelsPerUnit = (wheelPixelsPerUnit * wheelSamples + sample) / (wheelSamples + 1)
+        ++wheelSamples
+      }, 200)
+    } else {
+      display.wheelDX += dx; display.wheelDY += dy
+    }
+  }
+}
+
+// Selection objects are immutable. A new one is created every time
+// the selection changes. A selection is one or more non-overlapping
+// (and non-touching) ranges, sorted, and an integer that indicates
+// which one is the primary selection (the one that's scrolled into
+// view, that getCursor returns, etc).
+var Selection = function(ranges, primIndex) {
+  this.ranges = ranges
+  this.primIndex = primIndex
+};
+
+Selection.prototype.primary = function () { return this.ranges[this.primIndex] };
+
+Selection.prototype.equals = function (other) {
+    var this$1 = this;
+
+  if (other == this) { return true }
+  if (other.primIndex != this.primIndex || other.ranges.length != this.ranges.length) { return false }
+  for (var i = 0; i < this.ranges.length; i++) {
+    var here = this$1.ranges[i], there = other.ranges[i]
+    if (!equalCursorPos(here.anchor, there.anchor) || !equalCursorPos(here.head, there.head)) { return false }
+  }
+  return true
+};
+
+Selection.prototype.deepCopy = function () {
+    var this$1 = this;
+
+  var out = []
+  for (var i = 0; i < this.ranges.length; i++)
+    { out[i] = new Range(copyPos(this$1.ranges[i].anchor), copyPos(this$1.ranges[i].head)) }
+  return new Selection(out, this.primIndex)
+};
+
+Selection.prototype.somethingSelected = function () {
+    var this$1 = this;
+
+  for (var i = 0; i < this.ranges.length; i++)
+    { if (!this$1.ranges[i].empty()) { return true } }
+  return false
+};
+
+Selection.prototype.contains = function (pos, end) {
+    var this$1 = this;
+
+  if (!end) { end = pos }
+  for (var i = 0; i < this.ranges.length; i++) {
+    var range = this$1.ranges[i]
+    if (cmp(end, range.from()) >= 0 && cmp(pos, range.to()) <= 0)
+      { return i }
+  }
+  return -1
+};
+
+var Range = function(anchor, head) {
+  this.anchor = anchor; this.head = head
+};
+
+Range.prototype.from = function () { return minPos(this.anchor, this.head) };
+Range.prototype.to = function () { return maxPos(this.anchor, this.head) };
+Range.prototype.empty = function () { return this.head.line == this.anchor.line && this.head.ch == this.anchor.ch };
+
+// Take an unsorted, potentially overlapping set of ranges, and
+// build a selection out of it. 'Consumes' ranges array (modifying
+// it).
+function normalizeSelection(ranges, primIndex) {
+  var prim = ranges[primIndex]
+  ranges.sort(function (a, b) { return cmp(a.from(), b.from()); })
+  primIndex = indexOf(ranges, prim)
+  for (var i = 1; i < ranges.length; i++) {
+    var cur = ranges[i], prev = ranges[i - 1]
+    if (cmp(prev.to(), cur.from()) >= 0) {
+      var from = minPos(prev.from(), cur.from()), to = maxPos(prev.to(), cur.to())
+      var inv = prev.empty() ? cur.from() == cur.head : prev.from() == prev.head
+      if (i <= primIndex) { --primIndex }
+      ranges.splice(--i, 2, new Range(inv ? to : from, inv ? from : to))
+    }
+  }
+  return new Selection(ranges, primIndex)
+}
+
+function simpleSelection(anchor, head) {
+  return new Selection([new Range(anchor, head || anchor)], 0)
+}
+
+// Compute the position of the end of a change (its 'to' property
+// refers to the pre-change end).
+function changeEnd(change) {
+  if (!change.text) { return change.to }
+  return Pos(change.from.line + change.text.length - 1,
+             lst(change.text).length + (change.text.length == 1 ? change.from.ch : 0))
+}
+
+// Adjust a position to refer to the post-change position of the
+// same text, or the end of the change if the change covers it.
+function adjustForChange(pos, change) {
+  if (cmp(pos, change.from) < 0) { return pos }
+  if (cmp(pos, change.to) <= 0) { return changeEnd(change) }
+
+  var line = pos.line + change.text.length - (change.to.line - change.from.line) - 1, ch = pos.ch
+  if (pos.line == change.to.line) { ch += changeEnd(change).ch - change.to.ch }
+  return Pos(line, ch)
+}
+
+function computeSelAfterChange(doc, change) {
+  var out = []
+  for (var i = 0; i < doc.sel.ranges.length; i++) {
+    var range = doc.sel.ranges[i]
+    out.push(new Range(adjustForChange(range.anchor, change),
+                       adjustForChange(range.head, change)))
+  }
+  return normalizeSelection(out, doc.sel.primIndex)
+}
+
+function offsetPos(pos, old, nw) {
+  if (pos.line == old.line)
+    { return Pos(nw.line, pos.ch - old.ch + nw.ch) }
+  else
+    { return Pos(nw.line + (pos.line - old.line), pos.ch) }
+}
+
+// Used by replaceSelections to allow moving the selection to the
+// start or around the replaced test. Hint may be "start" or "around".
+function computeReplacedSel(doc, changes, hint) {
+  var out = []
+  var oldPrev = Pos(doc.first, 0), newPrev = oldPrev
+  for (var i = 0; i < changes.length; i++) {
+    var change = changes[i]
+    var from = offsetPos(change.from, oldPrev, newPrev)
+    var to = offsetPos(changeEnd(change), oldPrev, newPrev)
+    oldPrev = change.to
+    newPrev = to
+    if (hint == "around") {
+      var range = doc.sel.ranges[i], inv = cmp(range.head, range.anchor) < 0
+      out[i] = new Range(inv ? to : from, inv ? from : to)
+    } else {
+      out[i] = new Range(from, from)
+    }
+  }
+  return new Selection(out, doc.sel.primIndex)
+}
+
+// Used to get the editor into a consistent state again when options change.
+
+function loadMode(cm) {
+  cm.doc.mode = getMode(cm.options, cm.doc.modeOption)
+  resetModeState(cm)
+}
+
+function resetModeState(cm) {
+  cm.doc.iter(function (line) {
+    if (line.stateAfter) { line.stateAfter = null }
+    if (line.styles) { line.styles = null }
+  })
+  cm.doc.modeFrontier = cm.doc.highlightFrontier = cm.doc.first
+  startWorker(cm, 100)
+  cm.state.modeGen++
+  if (cm.curOp) { regChange(cm) }
+}
+
+// DOCUMENT DATA STRUCTURE
+
+// By default, updates that start and end at the beginning of a line
+// are treated specially, in order to make the association of line
+// widgets and marker elements with the text behave more intuitive.
+function isWholeLineUpdate(doc, change) {
+  return change.from.ch == 0 && change.to.ch == 0 && lst(change.text) == "" &&
+    (!doc.cm || doc.cm.options.wholeLineUpdateBefore)
+}
+
+// Perform a change on the document data structure.
+function updateDoc(doc, change, markedSpans, estimateHeight) {
+  function spansFor(n) {return markedSpans ? markedSpans[n] : null}
+  function update(line, text, spans) {
+    updateLine(line, text, spans, estimateHeight)
+    signalLater(line, "change", line, change)
+  }
+  function linesFor(start, end) {
+    var result = []
+    for (var i = start; i < end; ++i)
+      { result.push(new Line(text[i], spansFor(i), estimateHeight)) }
+    return result
+  }
+
+  var from = change.from, to = change.to, text = change.text
+  var firstLine = getLine(doc, from.line), lastLine = getLine(doc, to.line)
+  var lastText = lst(text), lastSpans = spansFor(text.length - 1), nlines = to.line - from.line
+
+  // Adjust the line structure
+  if (change.full) {
+    doc.insert(0, linesFor(0, text.length))
+    doc.remove(text.length, doc.size - text.length)
+  } else if (isWholeLineUpdate(doc, change)) {
+    // This is a whole-line replace. Treated specially to make
+    // sure line objects move the way they are supposed to.
+    var added = linesFor(0, text.length - 1)
+    update(lastLine, lastLine.text, lastSpans)
+    if (nlines) { doc.remove(from.line, nlines) }
+    if (added.length) { doc.insert(from.line, added) }
+  } else if (firstLine == lastLine) {
+    if (text.length == 1) {
+      update(firstLine, firstLine.text.slice(0, from.ch) + lastText + firstLine.text.slice(to.ch), lastSpans)
+    } else {
+      var added$1 = linesFor(1, text.length - 1)
+      added$1.push(new Line(lastText + firstLine.text.slice(to.ch), lastSpans, estimateHeight))
+      update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0))
+      doc.insert(from.line + 1, added$1)
+    }
+  } else if (text.length == 1) {
+    update(firstLine, firstLine.text.slice(0, from.ch) + text[0] + lastLine.text.slice(to.ch), spansFor(0))
+    doc.remove(from.line + 1, nlines)
+  } else {
+    update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0))
+    update(lastLine, lastText + lastLine.text.slice(to.ch), lastSpans)
+    var added$2 = linesFor(1, text.length - 1)
+    if (nlines > 1) { doc.remove(from.line + 1, nlines - 1) }
+    doc.insert(from.line + 1, added$2)
+  }
+
+  signalLater(doc, "change", doc, change)
+}
+
+// Call f for all linked documents.
+function linkedDocs(doc, f, sharedHistOnly) {
+  function propagate(doc, skip, sharedHist) {
+    if (doc.linked) { for (var i = 0; i < doc.linked.length; ++i) {
+      var rel = doc.linked[i]
+      if (rel.doc == skip) { continue }
+      var shared = sharedHist && rel.sharedHist
+      if (sharedHistOnly && !shared) { continue }
+      f(rel.doc, shared)
+      propagate(rel.doc, doc, shared)
+    } }
+  }
+  propagate(doc, null, true)
+}
+
+// Attach a document to an editor.
+function attachDoc(cm, doc) {
+  if (doc.cm) { throw new Error("This document is already in use.") }
+  cm.doc = doc
+  doc.cm = cm
+  estimateLineHeights(cm)
+  loadMode(cm)
+  setDirectionClass(cm)
+  if (!cm.options.lineWrapping) { findMaxLine(cm) }
+  cm.options.mode = doc.modeOption
+  regChange(cm)
+}
+
+function setDirectionClass(cm) {
+  ;(cm.doc.direction == "rtl" ? addClass : rmClass)(cm.display.lineDiv, "CodeMirror-rtl")
+}
+
+function directionChanged(cm) {
+  runInOp(cm, function () {
+    setDirectionClass(cm)
+    regChange(cm)
+  })
+}
+
+function History(startGen) {
+  // Arrays of change events and selections. Doing something adds an
+  // event to done and clears undo. Undoing moves events from done
+  // to undone, redoing moves them in the other direction.
+  this.done = []; this.undone = []
+  this.undoDepth = Infinity
+  // Used to track when changes can be merged into a single undo
+  // event
+  this.lastModTime = this.lastSelTime = 0
+  this.lastOp = this.lastSelOp = null
+  this.lastOrigin = this.lastSelOrigin = null
+  // Used by the isClean() method
+  this.generation = this.maxGeneration = startGen || 1
+}
+
+// Create a history change event from an updateDoc-style change
+// object.
+function historyChangeFromChange(doc, change) {
+  var histChange = {from: copyPos(change.from), to: changeEnd(change), text: getBetween(doc, change.from, change.to)}
+  attachLocalSpans(doc, histChange, change.from.line, change.to.line + 1)
+  linkedDocs(doc, function (doc) { return attachLocalSpans(doc, histChange, change.from.line, change.to.line + 1); }, true)
+  return histChange
+}
+
+// Pop all selection events off the end of a history array. Stop at
+// a change event.
+function clearSelectionEvents(array) {
+  while (array.length) {
+    var last = lst(array)
+    if (last.ranges) { array.pop() }
+    else { break }
+  }
+}
+
+// Find the top change event in the history. Pop off selection
+// events that are in the way.
+function lastChangeEvent(hist, force) {
+  if (force) {
+    clearSelectionEvents(hist.done)
+    return lst(hist.done)
+  } else if (hist.done.length && !lst(hist.done).ranges) {
+    return lst(hist.done)
+  } else if (hist.done.length > 1 && !hist.done[hist.done.length - 2].ranges) {
+    hist.done.pop()
+    return lst(hist.done)
+  }
+}
+
+// Register a change in the history. Merges changes that are within
+// a single operation, or are close together with an origin that
+// allows merging (starting with "+") into a single event.
+function addChangeToHistory(doc, change, selAfter, opId) {
+  var hist = doc.history
+  hist.undone.length = 0
+  var time = +new Date, cur
+  var last
+
+  if ((hist.lastOp == opId ||
+       hist.lastOrigin == change.origin && change.origin &&
+       ((change.origin.charAt(0) == "+" && doc.cm && hist.lastModTime > time - doc.cm.options.historyEventDelay) ||
+        change.origin.charAt(0) == "*")) &&
+      (cur = lastChangeEvent(hist, hist.lastOp == opId))) {
+    // Merge this change into the last event
+    last = lst(cur.changes)
+    if (cmp(change.from, change.to) == 0 && cmp(change.from, last.to) == 0) {
+      // Optimized case for simple insertion -- don't want to add
+      // new changesets for every character typed
+      last.to = changeEnd(change)
+    } else {
+      // Add new sub-event
+      cur.changes.push(historyChangeFromChange(doc, change))
+    }
+  } else {
+    // Can not be merged, start a new event.
+    var before = lst(hist.done)
+    if (!before || !before.ranges)
+      { pushSelectionToHistory(doc.sel, hist.done) }
+    cur = {changes: [historyChangeFromChange(doc, change)],
+           generation: hist.generation}
+    hist.done.push(cur)
+    while (hist.done.length > hist.undoDepth) {
+      hist.done.shift()
+      if (!hist.done[0].ranges) { hist.done.shift() }
+    }
+  }
+  hist.done.push(selAfter)
+  hist.generation = ++hist.maxGeneration
+  hist.lastModTime = hist.lastSelTime = time
+  hist.lastOp = hist.lastSelOp = opId
+  hist.lastOrigin = hist.lastSelOrigin = change.origin
+
+  if (!last) { signal(doc, "historyAdded") }
+}
+
+function selectionEventCanBeMerged(doc, origin, prev, sel) {
+  var ch = origin.charAt(0)
+  return ch == "*" ||
+    ch == "+" &&
+    prev.ranges.length == sel.ranges.length &&
+    prev.somethingSelected() == sel.somethingSelected() &&
+    new Date - doc.history.lastSelTime <= (doc.cm ? doc.cm.options.historyEventDelay : 500)
+}
+
+// Called whenever the selection changes, sets the new selection as
+// the pending selection in the history, and pushes the old pending
+// selection into the 'done' array when it was significantly
+// different (in number of selected ranges, emptiness, or time).
+function addSelectionToHistory(doc, sel, opId, options) {
+  var hist = doc.history, origin = options && options.origin
+
+  // A new event is started when the previous origin does not match
+  // the current, or the origins don't allow matching. Origins
+  // starting with * are always merged, those starting with + are
+  // merged when similar and close together in time.
+  if (opId == hist.lastSelOp ||
+      (origin && hist.lastSelOrigin == origin &&
+       (hist.lastModTime == hist.lastSelTime && hist.lastOrigin == origin ||
+        selectionEventCanBeMerged(doc, origin, lst(hist.done), sel))))
+    { hist.done[hist.done.length - 1] = sel }
+  else
+    { pushSelectionToHistory(sel, hist.done) }
+
+  hist.lastSelTime = +new Date
+  hist.lastSelOrigin = origin
+  hist.lastSelOp = opId
+  if (options && options.clearRedo !== false)
+    { clearSelectionEvents(hist.undone) }
+}
+
+function pushSelectionToHistory(sel, dest) {
+  var top = lst(dest)
+  if (!(top && top.ranges && top.equals(sel)))
+    { dest.push(sel) }
+}
+
+// Used to store marked span information in the history.
+function attachLocalSpans(doc, change, from, to) {
+  var existing = change["spans_" + doc.id], n = 0
+  doc.iter(Math.max(doc.first, from), Math.min(doc.first + doc.size, to), function (line) {
+    if (line.markedSpans)
+      { (existing || (existing = change["spans_" + doc.id] = {}))[n] = line.markedSpans }
+    ++n
+  })
+}
+
+// When un/re-doing restores text containing marked spans, those
+// that have been explicitly cleared should not be restored.
+function removeClearedSpans(spans) {
+  if (!spans) { return null }
+  var out
+  for (var i = 0; i < spans.length; ++i) {
+    if (spans[i].marker.explicitlyCleared) { if (!out) { out = spans.slice(0, i) } }
+    else if (out) { out.push(spans[i]) }
+  }
+  return !out ? spans : out.length ? out : null
+}
+
+// Retrieve and filter the old marked spans stored in a change event.
+function getOldSpans(doc, change) {
+  var found = change["spans_" + doc.id]
+  if (!found) { return null }
+  var nw = []
+  for (var i = 0; i < change.text.length; ++i)
+    { nw.push(removeClearedSpans(found[i])) }
+  return nw
+}
+
+// Used for un/re-doing changes from the history. Combines the
+// result of computing the existing spans with the set of spans that
+// existed in the history (so that deleting around a span and then
+// undoing brings back the span).
+function mergeOldSpans(doc, change) {
+  var old = getOldSpans(doc, change)
+  var stretched = stretchSpansOverChange(doc, change)
+  if (!old) { return stretched }
+  if (!stretched) { return old }
+
+  for (var i = 0; i < old.length; ++i) {
+    var oldCur = old[i], stretchCur = stretched[i]
+    if (oldCur && stretchCur) {
+      spans: for (var j = 0; j < stretchCur.length; ++j) {
+        var span = stretchCur[j]
+        for (var k = 0; k < oldCur.length; ++k)
+          { if (oldCur[k].marker == span.marker) { continue spans } }
+        oldCur.push(span)
+      }
+    } else if (stretchCur) {
+      old[i] = stretchCur
+    }
+  }
+  return old
+}
+
+// Used both to provide a JSON-safe object in .getHistory, and, when
+// detaching a document, to split the history in two
+function copyHistoryArray(events, newGroup, instantiateSel) {
+  var copy = []
+  for (var i = 0; i < events.length; ++i) {
+    var event = events[i]
+    if (event.ranges) {
+      copy.push(instantiateSel ? Selection.prototype.deepCopy.call(event) : event)
+      continue
+    }
+    var changes = event.changes, newChanges = []
+    copy.push({changes: newChanges})
+    for (var j = 0; j < changes.length; ++j) {
+      var change = changes[j], m = (void 0)
+      newChanges.push({from: change.from, to: change.to, text: change.text})
+      if (newGroup) { for (var prop in change) { if (m = prop.match(/^spans_(\d+)$/)) {
+        if (indexOf(newGroup, Number(m[1])) > -1) {
+          lst(newChanges)[prop] = change[prop]
+          delete change[prop]
+        }
+      } } }
+    }
+  }
+  return copy
+}
+
+// The 'scroll' parameter given to many of these indicated whether
+// the new cursor position should be scrolled into view after
+// modifying the selection.
+
+// If shift is held or the extend flag is set, extends a range to
+// include a given position (and optionally a second position).
+// Otherwise, simply returns the range between the given positions.
+// Used for cursor motion and such.
+function extendRange(range, head, other, extend) {
+  if (extend) {
+    var anchor = range.anchor
+    if (other) {
+      var posBefore = cmp(head, anchor) < 0
+      if (posBefore != (cmp(other, anchor) < 0)) {
+        anchor = head
+        head = other
+      } else if (posBefore != (cmp(head, other) < 0)) {
+        head = other
+      }
+    }
+    return new Range(anchor, head)
+  } else {
+    return new Range(other || head, head)
+  }
+}
+
+// Extend the primary selection range, discard the rest.
+function extendSelection(doc, head, other, options, extend) {
+  if (extend == null) { extend = doc.cm && (doc.cm.display.shift || doc.extend) }
+  setSelection(doc, new Selection([extendRange(doc.sel.primary(), head, other, extend)], 0), options)
+}
+
+// Extend all selections (pos is an array of selections with length
+// equal the number of selections)
+function extendSelections(doc, heads, options) {
+  var out = []
+  var extend = doc.cm && (doc.cm.display.shift || doc.extend)
+  for (var i = 0; i < doc.sel.ranges.length; i++)
+    { out[i] = extendRange(doc.sel.ranges[i], heads[i], null, extend) }
+  var newSel = normalizeSelection(out, doc.sel.primIndex)
+  setSelection(doc, newSel, options)
+}
+
+// Updates a single range in the selection.
+function replaceOneSelection(doc, i, range, options) {
+  var ranges = doc.sel.ranges.slice(0)
+  ranges[i] = range
+  setSelection(doc, normalizeSelection(ranges, doc.sel.primIndex), options)
+}
+
+// Reset the selection to a single range.
+function setSimpleSelection(doc, anchor, head, options) {
+  setSelection(doc, simpleSelection(anchor, head), options)
+}
+
+// Give beforeSelectionChange handlers a change to influence a
+// selection update.
+function filterSelectionChange(doc, sel, options) {
+  var obj = {
+    ranges: sel.ranges,
+    update: function(ranges) {
+      var this$1 = this;
+
+      this.ranges = []
+      for (var i = 0; i < ranges.length; i++)
+        { this$1.ranges[i] = new Range(clipPos(doc, ranges[i].anchor),
+                                   clipPos(doc, ranges[i].head)) }
+    },
+    origin: options && options.origin
+  }
+  signal(doc, "beforeSelectionChange", doc, obj)
+  if (doc.cm) { signal(doc.cm, "beforeSelectionChange", doc.cm, obj) }
+  if (obj.ranges != sel.ranges) { return normalizeSelection(obj.ranges, obj.ranges.length - 1) }
+  else { return sel }
+}
+
+function setSelectionReplaceHistory(doc, sel, options) {
+  var done = doc.history.done, last = lst(done)
+  if (last && last.ranges) {
+    done[done.length - 1] = sel
+    setSelectionNoUndo(doc, sel, options)
+  } else {
+    setSelection(doc, sel, options)
+  }
+}
+
+// Set a new selection.
+function setSelection(doc, sel, options) {
+  setSelectionNoUndo(doc, sel, options)
+  addSelectionToHistory(doc, doc.sel, doc.cm ? doc.cm.curOp.id : NaN, options)
+}
+
+function setSelectionNoUndo(doc, sel, options) {
+  if (hasHandler(doc, "beforeSelectionChange") || doc.cm && hasHandler(doc.cm, "beforeSelectionChange"))
+    { sel = filterSelectionChange(doc, sel, options) }
+
+  var bias = options && options.bias ||
+    (cmp(sel.primary().head, doc.sel.primary().head) < 0 ? -1 : 1)
+  setSelectionInner(doc, skipAtomicInSelection(doc, sel, bias, true))
+
+  if (!(options && options.scroll === false) && doc.cm)
+    { ensureCursorVisible(doc.cm) }
+}
+
+function setSelectionInner(doc, sel) {
+  if (sel.equals(doc.sel)) { return }
+
+  doc.sel = sel
+
+  if (doc.cm) {
+    doc.cm.curOp.updateInput = doc.cm.curOp.selectionChanged = true
+    signalCursorActivity(doc.cm)
+  }
+  signalLater(doc, "cursorActivity", doc)
+}
+
+// Verify that the selection does not partially select any atomic
+// marked ranges.
+function reCheckSelection(doc) {
+  setSelectionInner(doc, skipAtomicInSelection(doc, doc.sel, null, false))
+}
+
+// Return a selection that does not partially select any atomic
+// ranges.
+function skipAtomicInSelection(doc, sel, bias, mayClear) {
+  var out
+  for (var i = 0; i < sel.ranges.length; i++) {
+    var range = sel.ranges[i]
+    var old = sel.ranges.length == doc.sel.ranges.length && doc.sel.ranges[i]
+    var newAnchor = skipAtomic(doc, range.anchor, old && old.anchor, bias, mayClear)
+    var newHead = skipAtomic(doc, range.head, old && old.head, bias, mayClear)
+    if (out || newAnchor != range.anchor || newHead != range.head) {
+      if (!out) { out = sel.ranges.slice(0, i) }
+      out[i] = new Range(newAnchor, newHead)
+    }
+  }
+  return out ? normalizeSelection(out, sel.primIndex) : sel
+}
+
+function skipAtomicInner(doc, pos, oldPos, dir, mayClear) {
+  var line = getLine(doc, pos.line)
+  if (line.markedSpans) { for (var i = 0; i < line.markedSpans.length; ++i) {
+    var sp = line.markedSpans[i], m = sp.marker
+    if ((sp.from == null || (m.inclusiveLeft ? sp.from <= pos.ch : sp.from < pos.ch)) &&
+        (sp.to == null || (m.inclusiveRight ? sp.to >= pos.ch : sp.to > pos.ch))) {
+      if (mayClear) {
+        signal(m, "beforeCursorEnter")
+        if (m.explicitlyCleared) {
+          if (!line.markedSpans) { break }
+          else {--i; continue}
+        }
+      }
+      if (!m.atomic) { continue }
+
+      if (oldPos) {
+        var near = m.find(dir < 0 ? 1 : -1), diff = (void 0)
+        if (dir < 0 ? m.inclusiveRight : m.inclusiveLeft)
+          { near = movePos(doc, near, -dir, near && near.line == pos.line ? line : null) }
+        if (near && near.line == pos.line && (diff = cmp(near, oldPos)) && (dir < 0 ? diff < 0 : diff > 0))
+          { return skipAtomicInner(doc, near, pos, dir, mayClear) }
+      }
+
+      var far = m.find(dir < 0 ? -1 : 1)
+      if (dir < 0 ? m.inclusiveLeft : m.inclusiveRight)
+        { far = movePos(doc, far, dir, far.line == pos.line ? line : null) }
+      return far ? skipAtomicInner(doc, far, pos, dir, mayClear) : null
+    }
+  } }
+  return pos
+}
+
+// Ensure a given position is not inside an atomic range.
+function skipAtomic(doc, pos, oldPos, bias, mayClear) {
+  var dir = bias || 1
+  var found = skipAtomicInner(doc, pos, oldPos, dir, mayClear) ||
+      (!mayClear && skipAtomicInner(doc, pos, oldPos, dir, true)) ||
+      skipAtomicInner(doc, pos, oldPos, -dir, mayClear) ||
+      (!mayClear && skipAtomicInner(doc, pos, oldPos, -dir, true))
+  if (!found) {
+    doc.cantEdit = true
+    return Pos(doc.first, 0)
+  }
+  return found
+}
+
+function movePos(doc, pos, dir, line) {
+  if (dir < 0 && pos.ch == 0) {
+    if (pos.line > doc.first) { return clipPos(doc, Pos(pos.line - 1)) }
+    else { return null }
+  } else if (dir > 0 && pos.ch == (line || getLine(doc, pos.line)).text.length) {
+    if (pos.line < doc.first + doc.size - 1) { return Pos(pos.line + 1, 0) }
+    else { return null }
+  } else {
+    return new Pos(pos.line, pos.ch + dir)
+  }
+}
+
+function selectAll(cm) {
+  cm.setSelection(Pos(cm.firstLine(), 0), Pos(cm.lastLine()), sel_dontScroll)
+}
+
+// UPDATING
+
+// Allow "beforeChange" event handlers to influence a change
+function filterChange(doc, change, update) {
+  var obj = {
+    canceled: false,
+    from: change.from,
+    to: change.to,
+    text: change.text,
+    origin: change.origin,
+    cancel: function () { return obj.canceled = true; }
+  }
+  if (update) { obj.update = function (from, to, text, origin) {
+    if (from) { obj.from = clipPos(doc, from) }
+    if (to) { obj.to = clipPos(doc, to) }
+    if (text) { obj.text = text }
+    if (origin !== undefined) { obj.origin = origin }
+  } }
+  signal(doc, "beforeChange", doc, obj)
+  if (doc.cm) { signal(doc.cm, "beforeChange", doc.cm, obj) }
+
+  if (obj.canceled) { return null }
+  return {from: obj.from, to: obj.to, text: obj.text, origin: obj.origin}
+}
+
+// Apply a change to a document, and add it to the document's
+// history, and propagating it to all linked documents.
+function makeChange(doc, change, ignoreReadOnly) {
+  if (doc.cm) {
+    if (!doc.cm.curOp) { return operation(doc.cm, makeChange)(doc, change, ignoreReadOnly) }
+    if (doc.cm.state.suppressEdits) { return }
+  }
+
+  if (hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm, "beforeChange")) {
+    change = filterChange(doc, change, true)
+    if (!change) { return }
+  }
+
+  // Possibly split or suppress the update based on the presence
+  // of read-only spans in its range.
+  var split = sawReadOnlySpans && !ignoreReadOnly && removeReadOnlyRanges(doc, change.from, change.to)
+  if (split) {
+    for (var i = split.length - 1; i >= 0; --i)
+      { makeChangeInner(doc, {from: split[i].from, to: split[i].to, text: i ? [""] : change.text, origin: change.origin}) }
+  } else {
+    makeChangeInner(doc, change)
+  }
+}
+
+function makeChangeInner(doc, change) {
+  if (change.text.length == 1 && change.text[0] == "" && cmp(change.from, change.to) == 0) { return }
+  var selAfter = computeSelAfterChange(doc, change)
+  addChangeToHistory(doc, change, selAfter, doc.cm ? doc.cm.curOp.id : NaN)
+
+  makeChangeSingleDoc(doc, change, selAfter, stretchSpansOverChange(doc, change))
+  var rebased = []
+
+  linkedDocs(doc, function (doc, sharedHist) {
+    if (!sharedHist && indexOf(rebased, doc.history) == -1) {
+      rebaseHist(doc.history, change)
+      rebased.push(doc.history)
+    }
+    makeChangeSingleDoc(doc, change, null, stretchSpansOverChange(doc, change))
+  })
+}
+
+// Revert a change stored in a document's history.
+function makeChangeFromHistory(doc, type, allowSelectionOnly) {
+  if (doc.cm && doc.cm.state.suppressEdits && !allowSelectionOnly) { return }
+
+  var hist = doc.history, event, selAfter = doc.sel
+  var source = type == "undo" ? hist.done : hist.undone, dest = type == "undo" ? hist.undone : hist.done
+
+  // Verify that there is a useable event (so that ctrl-z won't
+  // needlessly clear selection events)
+  var i = 0
+  for (; i < source.length; i++) {
+    event = source[i]
+    if (allowSelectionOnly ? event.ranges && !event.equals(doc.sel) : !event.ranges)
+      { break }
+  }
+  if (i == source.length) { return }
+  hist.lastOrigin = hist.lastSelOrigin = null
+
+  for (;;) {
+    event = source.pop()
+    if (event.ranges) {
+      pushSelectionToHistory(event, dest)
+      if (allowSelectionOnly && !event.equals(doc.sel)) {
+        setSelection(doc, event, {clearRedo: false})
+        return
+      }
+      selAfter = event
+    }
+    else { break }
+  }
+
+  // Build up a reverse change object to add to the opposite history
+  // stack (redo when undoing, and vice versa).
+  var antiChanges = []
+  pushSelectionToHistory(selAfter, dest)
+  dest.push({changes: antiChanges, generation: hist.generation})
+  hist.generation = event.generation || ++hist.maxGeneration
+
+  var filter = hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm, "beforeChange")
+
+  var loop = function ( i ) {
+    var change = event.changes[i]
+    change.origin = type
+    if (filter && !filterChange(doc, change, false)) {
+      source.length = 0
+      return {}
+    }
+
+    antiChanges.push(historyChangeFromChange(doc, change))
+
+    var after = i ? computeSelAfterChange(doc, change) : lst(source)
+    makeChangeSingleDoc(doc, change, after, mergeOldSpans(doc, change))
+    if (!i && doc.cm) { doc.cm.scrollIntoView({from: change.from, to: changeEnd(change)}) }
+    var rebased = []
+
+    // Propagate to the linked documents
+    linkedDocs(doc, function (doc, sharedHist) {
+      if (!sharedHist && indexOf(rebased, doc.history) == -1) {
+        rebaseHist(doc.history, change)
+        rebased.push(doc.history)
+      }
+      makeChangeSingleDoc(doc, change, null, mergeOldSpans(doc, change))
+    })
+  };
+
+  for (var i$1 = event.changes.length - 1; i$1 >= 0; --i$1) {
+    var returned = loop( i$1 );
+
+    if ( returned ) return returned.v;
+  }
+}
+
+// Sub-views need their line numbers shifted when text is added
+// above or below them in the parent document.
+function shiftDoc(doc, distance) {
+  if (distance == 0) { return }
+  doc.first += distance
+  doc.sel = new Selection(map(doc.sel.ranges, function (range) { return new Range(
+    Pos(range.anchor.line + distance, range.anchor.ch),
+    Pos(range.head.line + distance, range.head.ch)
+  ); }), doc.sel.primIndex)
+  if (doc.cm) {
+    regChange(doc.cm, doc.first, doc.first - distance, distance)
+    for (var d = doc.cm.display, l = d.viewFrom; l < d.viewTo; l++)
+      { regLineChange(doc.cm, l, "gutter") }
+  }
+}
+
+// More lower-level change function, handling only a single document
+// (not linked ones).
+function makeChangeSingleDoc(doc, change, selAfter, spans) {
+  if (doc.cm && !doc.cm.curOp)
+    { return operation(doc.cm, makeChangeSingleDoc)(doc, change, selAfter, spans) }
+
+  if (change.to.line < doc.first) {
+    shiftDoc(doc, change.text.length - 1 - (change.to.line - change.from.line))
+    return
+  }
+  if (change.from.line > doc.lastLine()) { return }
+
+  // Clip the change to the size of this doc
+  if (change.from.line < doc.first) {
+    var shift = change.text.length - 1 - (doc.first - change.from.line)
+    shiftDoc(doc, shift)
+    change = {from: Pos(doc.first, 0), to: Pos(change.to.line + shift, change.to.ch),
+              text: [lst(change.text)], origin: change.origin}
+  }
+  var last = doc.lastLine()
+  if (change.to.line > last) {
+    change = {from: change.from, to: Pos(last, getLine(doc, last).text.length),
+              text: [change.text[0]], origin: change.origin}
+  }
+
+  change.removed = getBetween(doc, change.from, change.to)
+
+  if (!selAfter) { selAfter = computeSelAfterChange(doc, change) }
+  if (doc.cm) { makeChangeSingleDocInEditor(doc.cm, change, spans) }
+  else { updateDoc(doc, change, spans) }
+  setSelectionNoUndo(doc, selAfter, sel_dontScroll)
+}
+
+// Handle the interaction of a change to a document with the editor
+// that this document is part of.
+function makeChangeSingleDocInEditor(cm, change, spans) {
+  var doc = cm.doc, display = cm.display, from = change.from, to = change.to
+
+  var recomputeMaxLength = false, checkWidthStart = from.line
+  if (!cm.options.lineWrapping) {
+    checkWidthStart = lineNo(visualLine(getLine(doc, from.line)))
+    doc.iter(checkWidthStart, to.line + 1, function (line) {
+      if (line == display.maxLine) {
+        recomputeMaxLength = true
+        return true
+      }
+    })
+  }
+
+  if (doc.sel.contains(change.from, change.to) > -1)
+    { signalCursorActivity(cm) }
+
+  updateDoc(doc, change, spans, estimateHeight(cm))
+
+  if (!cm.options.lineWrapping) {
+    doc.iter(checkWidthStart, from.line + change.text.length, function (line) {
+      var len = lineLength(line)
+      if (len > display.maxLineLength) {
+        display.maxLine = line
+        display.maxLineLength = len
+        display.maxLineChanged = true
+        recomputeMaxLength = false
+      }
+    })
+    if (recomputeMaxLength) { cm.curOp.updateMaxLine = true }
+  }
+
+  retreatFrontier(doc, from.line)
+  startWorker(cm, 400)
+
+  var lendiff = change.text.length - (to.line - from.line) - 1
+  // Remember that these lines changed, for updating the display
+  if (change.full)
+    { regChange(cm) }
+  else if (from.line == to.line && change.text.length == 1 && !isWholeLineUpdate(cm.doc, change))
+    { regLineChange(cm, from.line, "text") }
+  else
+    { regChange(cm, from.line, to.line + 1, lendiff) }
+
+  var changesHandler = hasHandler(cm, "changes"), changeHandler = hasHandler(cm, "change")
+  if (changeHandler || changesHandler) {
+    var obj = {
+      from: from, to: to,
+      text: change.text,
+      removed: change.removed,
+      origin: change.origin
+    }
+    if (changeHandler) { signalLater(cm, "change", cm, obj) }
+    if (changesHandler) { (cm.curOp.changeObjs || (cm.curOp.changeObjs = [])).push(obj) }
+  }
+  cm.display.selForContextMenu = null
+}
+
+function replaceRange(doc, code, from, to, origin) {
+  if (!to) { to = from }
+  if (cmp(to, from) < 0) { var assign;
+    (assign = [to, from], from = assign[0], to = assign[1], assign) }
+  if (typeof code == "string") { code = doc.splitLines(code) }
+  makeChange(doc, {from: from, to: to, text: code, origin: origin})
+}
+
+// Rebasing/resetting history to deal with externally-sourced changes
+
+function rebaseHistSelSingle(pos, from, to, diff) {
+  if (to < pos.line) {
+    pos.line += diff
+  } else if (from < pos.line) {
+    pos.line = from
+    pos.ch = 0
+  }
+}
+
+// Tries to rebase an array of history events given a change in the
+// document. If the change touches the same lines as the event, the
+// event, and everything 'behind' it, is discarded. If the change is
+// before the event, the event's positions are updated. Uses a
+// copy-on-write scheme for the positions, to avoid having to
+// reallocate them all on every rebase, but also avoid problems with
+// shared position objects being unsafely updated.
+function rebaseHistArray(array, from, to, diff) {
+  for (var i = 0; i < array.length; ++i) {
+    var sub = array[i], ok = true
+    if (sub.ranges) {
+      if (!sub.copied) { sub = array[i] = sub.deepCopy(); sub.copied = true }
+      for (var j = 0; j < sub.ranges.length; j++) {
+        rebaseHistSelSingle(sub.ranges[j].anchor, from, to, diff)
+        rebaseHistSelSingle(sub.ranges[j].head, from, to, diff)
+      }
+      continue
+    }
+    for (var j$1 = 0; j$1 < sub.changes.length; ++j$1) {
+      var cur = sub.changes[j$1]
+      if (to < cur.from.line) {
+        cur.from = Pos(cur.from.line + diff, cur.from.ch)
+        cur.to = Pos(cur.to.line + diff, cur.to.ch)
+      } else if (from <= cur.to.line) {
+        ok = false
+        break
+      }
+    }
+    if (!ok) {
+      array.splice(0, i + 1)
+      i = 0
+    }
+  }
+}
+
+function rebaseHist(hist, change) {
+  var from = change.from.line, to = change.to.line, diff = change.text.length - (to - from) - 1
+  rebaseHistArray(hist.done, from, to, diff)
+  rebaseHistArray(hist.undone, from, to, diff)
+}
+
+// Utility for applying a change to a line by handle or number,
+// returning the number and optionally registering the line as
+// changed.
+function changeLine(doc, handle, changeType, op) {
+  var no = handle, line = handle
+  if (typeof handle == "number") { line = getLine(doc, clipLine(doc, handle)) }
+  else { no = lineNo(handle) }
+  if (no == null) { return null }
+  if (op(line, no) && doc.cm) { regLineChange(doc.cm, no, changeType) }
+  return line
+}
+
+// The document is represented as a BTree consisting of leaves, with
+// chunk of lines in them, and branches, with up to ten leaves or
+// other branch nodes below them. The top node is always a branch
+// node, and is the document object itself (meaning it has
+// additional methods and properties).
+//
+// All nodes have parent links. The tree is used both to go from
+// line numbers to line objects, and to go from objects to numbers.
+// It also indexes by height, and is used to convert between height
+// and line object, and to find the total height of the document.
+//
+// See also http://marijnhaverbeke.nl/blog/codemirror-line-tree.html
+
+function LeafChunk(lines) {
+  var this$1 = this;
+
+  this.lines = lines
+  this.parent = null
+  var height = 0
+  for (var i = 0; i < lines.length; ++i) {
+    lines[i].parent = this$1
+    height += lines[i].height
+  }
+  this.height = height
+}
+
+LeafChunk.prototype = {
+  chunkSize: function chunkSize() { return this.lines.length },
+
+  // Remove the n lines at offset 'at'.
+  removeInner: function removeInner(at, n) {
+    var this$1 = this;
+
+    for (var i = at, e = at + n; i < e; ++i) {
+      var line = this$1.lines[i]
+      this$1.height -= line.height
+      cleanUpLine(line)
+      signalLater(line, "delete")
+    }
+    this.lines.splice(at, n)
+  },
+
+  // Helper used to collapse a small branch into a single leaf.
+  collapse: function collapse(lines) {
+    lines.push.apply(lines, this.lines)
+  },
+
+  // Insert the given array of lines at offset 'at', count them as
+  // having the given height.
+  insertInner: function insertInner(at, lines, height) {
+    var this$1 = this;
+
+    this.height += height
+    this.lines = this.lines.slice(0, at).concat(lines).concat(this.lines.slice(at))
+    for (var i = 0; i < lines.length; ++i) { lines[i].parent = this$1 }
+  },
+
+  // Used to iterate over a part of the tree.
+  iterN: function iterN(at, n, op) {
+    var this$1 = this;
+
+    for (var e = at + n; at < e; ++at)
+      { if (op(this$1.lines[at])) { return true } }
+  }
+}
+
+function BranchChunk(children) {
+  var this$1 = this;
+
+  this.children = children
+  var size = 0, height = 0
+  for (var i = 0; i < children.length; ++i) {
+    var ch = children[i]
+    size += ch.chunkSize(); height += ch.height
+    ch.parent = this$1
+  }
+  this.size = size
+  this.height = height
+  this.parent = null
+}
+
+BranchChunk.prototype = {
+  chunkSize: function chunkSize() { return this.size },
+
+  removeInner: function removeInner(at, n) {
+    var this$1 = this;
+
+    this.size -= n
+    for (var i = 0; i < this.children.length; ++i) {
+      var child = this$1.children[i], sz = child.chunkSize()
+      if (at < sz) {
+        var rm = Math.min(n, sz - at), oldHeight = child.height
+        child.removeInner(at, rm)
+        this$1.height -= oldHeight - child.height
+        if (sz == rm) { this$1.children.splice(i--, 1); child.parent = null }
+        if ((n -= rm) == 0) { break }
+        at = 0
+      } else { at -= sz }
+    }
+    // If the result is smaller than 25 lines, ensure that it is a
+    // single leaf node.
+    if (this.size - n < 25 &&
+        (this.children.length > 1 || !(this.children[0] instanceof LeafChunk))) {
+      var lines = []
+      this.collapse(lines)
+      this.children = [new LeafChunk(lines)]
+      this.children[0].parent = this
+    }
+  },
+
+  collapse: function collapse(lines) {
+    var this$1 = this;
+
+    for (var i = 0; i < this.children.length; ++i) { this$1.children[i].collapse(lines) }
+  },
+
+  insertInner: function insertInner(at, lines, height) {
+    var this$1 = this;
+
+    this.size += lines.length
+    this.height += height
+    for (var i = 0; i < this.children.length; ++i) {
+      var child = this$1.children[i], sz = child.chunkSize()
+      if (at <= sz) {
+        child.insertInner(at, lines, height)
+        if (child.lines && child.lines.length > 50) {
+          // To avoid memory thrashing when child.lines is huge (e.g. first view of a large file), it's never spliced.
+          // Instead, small slices are taken. They're taken in order because sequential memory accesses are fastest.
+          var remaining = child.lines.length % 25 + 25
+          for (var pos = remaining; pos < child.lines.length;) {
+            var leaf = new LeafChunk(child.lines.slice(pos, pos += 25))
+            child.height -= leaf.height
+            this$1.children.splice(++i, 0, leaf)
+            leaf.parent = this$1
+          }
+          child.lines = child.lines.slice(0, remaining)
+          this$1.maybeSpill()
+        }
+        break
+      }
+      at -= sz
+    }
+  },
+
+  // When a node has grown, check whether it should be split.
+  maybeSpill: function maybeSpill() {
+    if (this.children.length <= 10) { return }
+    var me = this
+    do {
+      var spilled = me.children.splice(me.children.length - 5, 5)
+      var sibling = new BranchChunk(spilled)
+      if (!me.parent) { // Become the parent node
+        var copy = new BranchChunk(me.children)
+        copy.parent = me
+        me.children = [copy, sibling]
+        me = copy
+     } else {
+        me.size -= sibling.size
+        me.height -= sibling.height
+        var myIndex = indexOf(me.parent.children, me)
+        me.parent.children.splice(myIndex + 1, 0, sibling)
+      }
+      sibling.parent = me.parent
+    } while (me.children.length > 10)
+    me.parent.maybeSpill()
+  },
+
+  iterN: function iterN(at, n, op) {
+    var this$1 = this;
+
+    for (var i = 0; i < this.children.length; ++i) {
+      var child = this$1.children[i], sz = child.chunkSize()
+      if (at < sz) {
+        var used = Math.min(n, sz - at)
+        if (child.iterN(at, used, op)) { return true }
+        if ((n -= used) == 0) { break }
+        at = 0
+      } else { at -= sz }
+    }
+  }
+}
+
+// Line widgets are block elements displayed above or below a line.
+
+var LineWidget = function(doc, node, options) {
+  var this$1 = this;
+
+  if (options) { for (var opt in options) { if (options.hasOwnProperty(opt))
+    { this$1[opt] = options[opt] } } }
+  this.doc = doc
+  this.node = node
+};
+
+LineWidget.prototype.clear = function () {
+    var this$1 = this;
+
+  var cm = this.doc.cm, ws = this.line.widgets, line = this.line, no = lineNo(line)
+  if (no == null || !ws) { return }
+  for (var i = 0; i < ws.length; ++i) { if (ws[i] == this$1) { ws.splice(i--, 1) } }
+  if (!ws.length) { line.widgets = null }
+  var height = widgetHeight(this)
+  updateLineHeight(line, Math.max(0, line.height - height))
+  if (cm) {
+    runInOp(cm, function () {
+      adjustScrollWhenAboveVisible(cm, line, -height)
+      regLineChange(cm, no, "widget")
+    })
+    signalLater(cm, "lineWidgetCleared", cm, this, no)
+  }
+};
+
+LineWidget.prototype.changed = function () {
+    var this$1 = this;
+
+  var oldH = this.height, cm = this.doc.cm, line = this.line
+  this.height = null
+  var diff = widgetHeight(this) - oldH
+  if (!diff) { return }
+  updateLineHeight(line, line.height + diff)
+  if (cm) {
+    runInOp(cm, function () {
+      cm.curOp.forceUpdate = true
+      adjustScrollWhenAboveVisible(cm, line, diff)
+      signalLater(cm, "lineWidgetChanged", cm, this$1, lineNo(line))
+    })
+  }
+};
+eventMixin(LineWidget)
+
+function adjustScrollWhenAboveVisible(cm, line, diff) {
+  if (heightAtLine(line) < ((cm.curOp && cm.curOp.scrollTop) || cm.doc.scrollTop))
+    { addToScrollTop(cm, diff) }
+}
+
+function addLineWidget(doc, handle, node, options) {
+  var widget = new LineWidget(doc, node, options)
+  var cm = doc.cm
+  if (cm && widget.noHScroll) { cm.display.alignWidgets = true }
+  changeLine(doc, handle, "widget", function (line) {
+    var widgets = line.widgets || (line.widgets = [])
+    if (widget.insertAt == null) { widgets.push(widget) }
+    else { widgets.splice(Math.min(widgets.length - 1, Math.max(0, widget.insertAt)), 0, widget) }
+    widget.line = line
+    if (cm && !lineIsHidden(doc, line)) {
+      var aboveVisible = heightAtLine(line) < doc.scrollTop
+      updateLineHeight(line, line.height + widgetHeight(widget))
+      if (aboveVisible) { addToScrollTop(cm, widget.height) }
+      cm.curOp.forceUpdate = true
+    }
+    return true
+  })
+  signalLater(cm, "lineWidgetAdded", cm, widget, typeof handle == "number" ? handle : lineNo(handle))
+  return widget
+}
+
+// TEXTMARKERS
+
+// Created with markText and setBookmark methods. A TextMarker is a
+// handle that can be used to clear or find a marked position in the
+// document. Line objects hold arrays (markedSpans) containing
+// {from, to, marker} object pointing to such marker objects, and
+// indicating that such a marker is present on that line. Multiple
+// lines may point to the same marker when it spans across lines.
+// The spans will have null for their from/to properties when the
+// marker continues beyond the start/end of the line. Markers have
+// links back to the lines they currently touch.
+
+// Collapsed markers have unique ids, in order to be able to order
+// them, which is needed for uniquely determining an outer marker
+// when they overlap (they may nest, but not partially overlap).
+var nextMarkerId = 0
+
+var TextMarker = function(doc, type) {
+  this.lines = []
+  this.type = type
+  this.doc = doc
+  this.id = ++nextMarkerId
+};
+
+// Clear the marker.
+TextMarker.prototype.clear = function () {
+    var this$1 = this;
+
+  if (this.explicitlyCleared) { return }
+  var cm = this.doc.cm, withOp = cm && !cm.curOp
+  if (withOp) { startOperation(cm) }
+  if (hasHandler(this, "clear")) {
+    var found = this.find()
+    if (found) { signalLater(this, "clear", found.from, found.to) }
+  }
+  var min = null, max = null
+  for (var i = 0; i < this.lines.length; ++i) {
+    var line = this$1.lines[i]
+    var span = getMarkedSpanFor(line.markedSpans, this$1)
+    if (cm && !this$1.collapsed) { regLineChange(cm, lineNo(line), "text") }
+    else if (cm) {
+      if (span.to != null) { max = lineNo(line) }
+      if (span.from != null) { min = lineNo(line) }
+    }
+    line.markedSpans = removeMarkedSpan(line.markedSpans, span)
+    if (span.from == null && this$1.collapsed && !lineIsHidden(this$1.doc, line) && cm)
+      { updateLineHeight(line, textHeight(cm.display)) }
+  }
+  if (cm && this.collapsed && !cm.options.lineWrapping) { for (var i$1 = 0; i$1 < this.lines.length; ++i$1) {
+    var visual = visualLine(this$1.lines[i$1]), len = lineLength(visual)
+    if (len > cm.display.maxLineLength) {
+      cm.display.maxLine = visual
+      cm.display.maxLineLength = len
+      cm.display.maxLineChanged = true
+    }
+  } }
+
+  if (min != null && cm && this.collapsed) { regChange(cm, min, max + 1) }
+  this.lines.length = 0
+  this.explicitlyCleared = true
+  if (this.atomic && this.doc.cantEdit) {
+    this.doc.cantEdit = false
+    if (cm) { reCheckSelection(cm.doc) }
+  }
+  if (cm) { signalLater(cm, "markerCleared", cm, this, min, max) }
+  if (withOp) { endOperation(cm) }
+  if (this.parent) { this.parent.clear() }
+};
+
+// Find the position of the marker in the document. Returns a {from,
+// to} object by default. Side can be passed to get a specific side
+// -- 0 (both), -1 (left), or 1 (right). When lineObj is true, the
+// Pos objects returned contain a line object, rather than a line
+// number (used to prevent looking up the same line twice).
+TextMarker.prototype.find = function (side, lineObj) {
+    var this$1 = this;
+
+  if (side == null && this.type == "bookmark") { side = 1 }
+  var from, to
+  for (var i = 0; i < this.lines.length; ++i) {
+    var line = this$1.lines[i]
+    var span = getMarkedSpanFor(line.markedSpans, this$1)
+    if (span.from != null) {
+      from = Pos(lineObj ? line : lineNo(line), span.from)
+      if (side == -1) { return from }
+    }
+    if (span.to != null) {
+      to = Pos(lineObj ? line : lineNo(line), span.to)
+      if (side == 1) { return to }
+    }
+  }
+  return from && {from: from, to: to}
+};
+
+// Signals that the marker's widget changed, and surrounding layout
+// should be recomputed.
+TextMarker.prototype.changed = function () {
+    var this$1 = this;
+
+  var pos = this.find(-1, true), widget = this, cm = this.doc.cm
+  if (!pos || !cm) { return }
+  runInOp(cm, function () {
+    var line = pos.line, lineN = lineNo(pos.line)
+    var view = findViewForLine(cm, lineN)
+    if (view) {
+      clearLineMeasurementCacheFor(view)
+      cm.curOp.selectionChanged = cm.curOp.forceUpdate = true
+    }
+    cm.curOp.updateMaxLine = true
+    if (!lineIsHidden(widget.doc, line) && widget.height != null) {
+      var oldHeight = widget.height
+      widget.height = null
+      var dHeight = widgetHeight(widget) - oldHeight
+      if (dHeight)
+        { updateLineHeight(line, line.height + dHeight) }
+    }
+    signalLater(cm, "markerChanged", cm, this$1)
+  })
+};
+
+TextMarker.prototype.attachLine = function (line) {
+  if (!this.lines.length && this.doc.cm) {
+    var op = this.doc.cm.curOp
+    if (!op.maybeHiddenMarkers || indexOf(op.maybeHiddenMarkers, this) == -1)
+      { (op.maybeUnhiddenMarkers || (op.maybeUnhiddenMarkers = [])).push(this) }
+  }
+  this.lines.push(line)
+};
+
+TextMarker.prototype.detachLine = function (line) {
+  this.lines.splice(indexOf(this.lines, line), 1)
+  if (!this.lines.length && this.doc.cm) {
+    var op = this.doc.cm.curOp
+    ;(op.maybeHiddenMarkers || (op.maybeHiddenMarkers = [])).push(this)
+  }
+};
+eventMixin(TextMarker)
+
+// Create a marker, wire it up to the right lines, and
+function markText(doc, from, to, options, type) {
+  // Shared markers (across linked documents) are handled separately
+  // (markTextShared will call out to this again, once per
+  // document).
+  if (options && options.shared) { return markTextShared(doc, from, to, options, type) }
+  // Ensure we are in an operation.
+  if (doc.cm && !doc.cm.curOp) { return operation(doc.cm, markText)(doc, from, to, options, type) }
+
+  var marker = new TextMarker(doc, type), diff = cmp(from, to)
+  if (options) { copyObj(options, marker, false) }
+  // Don't connect empty markers unless clearWhenEmpty is false
+  if (diff > 0 || diff == 0 && marker.clearWhenEmpty !== false)
+    { return marker }
+  if (marker.replacedWith) {
+    // Showing up as a widget implies collapsed (widget replaces text)
+    marker.collapsed = true
+    marker.widgetNode = eltP("span", [marker.replacedWith], "CodeMirror-widget")
+    if (!options.handleMouseEvents) { marker.widgetNode.setAttribute("cm-ignore-events", "true") }
+    if (options.insertLeft) { marker.widgetNode.insertLeft = true }
+  }
+  if (marker.collapsed) {
+    if (conflictingCollapsedRange(doc, from.line, from, to, marker) ||
+        from.line != to.line && conflictingCollapsedRange(doc, to.line, from, to, marker))
+      { throw new Error("Inserting collapsed marker partially overlapping an existing one") }
+    seeCollapsedSpans()
+  }
+
+  if (marker.addToHistory)
+    { addChangeToHistory(doc, {from: from, to: to, origin: "markText"}, doc.sel, NaN) }
+
+  var curLine = from.line, cm = doc.cm, updateMaxLine
+  doc.iter(curLine, to.line + 1, function (line) {
+    if (cm && marker.collapsed && !cm.options.lineWrapping && visualLine(line) == cm.display.maxLine)
+      { updateMaxLine = true }
+    if (marker.collapsed && curLine != from.line) { updateLineHeight(line, 0) }
+    addMarkedSpan(line, new MarkedSpan(marker,
+                                       curLine == from.line ? from.ch : null,
+                                       curLine == to.line ? to.ch : null))
+    ++curLine
+  })
+  // lineIsHidden depends on the presence of the spans, so needs a second pass
+  if (marker.collapsed) { doc.iter(from.line, to.line + 1, function (line) {
+    if (lineIsHidden(doc, line)) { updateLineHeight(line, 0) }
+  }) }
+
+  if (marker.clearOnEnter) { on(marker, "beforeCursorEnter", function () { return marker.clear(); }) }
+
+  if (marker.readOnly) {
+    seeReadOnlySpans()
+    if (doc.history.done.length || doc.history.undone.length)
+      { doc.clearHistory() }
+  }
+  if (marker.collapsed) {
+    marker.id = ++nextMarkerId
+    marker.atomic = true
+  }
+  if (cm) {
+    // Sync editor state
+    if (updateMaxLine) { cm.curOp.updateMaxLine = true }
+    if (marker.collapsed)
+      { regChange(cm, from.line, to.line + 1) }
+    else if (marker.className || marker.title || marker.startStyle || marker.endStyle || marker.css)
+      { for (var i = from.line; i <= to.line; i++) { regLineChange(cm, i, "text") } }
+    if (marker.atomic) { reCheckSelection(cm.doc) }
+    signalLater(cm, "markerAdded", cm, marker)
+  }
+  return marker
+}
+
+// SHARED TEXTMARKERS
+
+// A shared marker spans multiple linked documents. It is
+// implemented as a meta-marker-object controlling multiple normal
+// markers.
+var SharedTextMarker = function(markers, primary) {
+  var this$1 = this;
+
+  this.markers = markers
+  this.primary = primary
+  for (var i = 0; i < markers.length; ++i)
+    { markers[i].parent = this$1 }
+};
+
+SharedTextMarker.prototype.clear = function () {
+    var this$1 = this;
+
+  if (this.explicitlyCleared) { return }
+  this.explicitlyCleared = true
+  for (var i = 0; i < this.markers.length; ++i)
+    { this$1.markers[i].clear() }
+  signalLater(this, "clear")
+};
+
+SharedTextMarker.prototype.find = function (side, lineObj) {
+  return this.primary.find(side, lineObj)
+};
+eventMixin(SharedTextMarker)
+
+function markTextShared(doc, from, to, options, type) {
+  options = copyObj(options)
+  options.shared = false
+  var markers = [markText(doc, from, to, options, type)], primary = markers[0]
+  var widget = options.widgetNode
+  linkedDocs(doc, function (doc) {
+    if (widget) { options.widgetNode = widget.cloneNode(true) }
+    markers.push(markText(doc, clipPos(doc, from), clipPos(doc, to), options, type))
+    for (var i = 0; i < doc.linked.length; ++i)
+      { if (doc.linked[i].isParent) { return } }
+    primary = lst(markers)
+  })
+  return new SharedTextMarker(markers, primary)
+}
+
+function findSharedMarkers(doc) {
+  return doc.findMarks(Pos(doc.first, 0), doc.clipPos(Pos(doc.lastLine())), function (m) { return m.parent; })
+}
+
+function copySharedMarkers(doc, markers) {
+  for (var i = 0; i < markers.length; i++) {
+    var marker = markers[i], pos = marker.find()
+    var mFrom = doc.clipPos(pos.from), mTo = doc.clipPos(pos.to)
+    if (cmp(mFrom, mTo)) {
+      var subMark = markText(doc, mFrom, mTo, marker.primary, marker.primary.type)
+      marker.markers.push(subMark)
+      subMark.parent = marker
+    }
+  }
+}
+
+function detachSharedMarkers(markers) {
+  var loop = function ( i ) {
+    var marker = markers[i], linked = [marker.primary.doc]
+    linkedDocs(marker.primary.doc, function (d) { return linked.push(d); })
+    for (var j = 0; j < marker.markers.length; j++) {
+      var subMarker = marker.markers[j]
+      if (indexOf(linked, subMarker.doc) == -1) {
+        subMarker.parent = null
+        marker.markers.splice(j--, 1)
+      }
+    }
+  };
+
+  for (var i = 0; i < markers.length; i++) loop( i );
+}
+
+var nextDocId = 0
+var Doc = function(text, mode, firstLine, lineSep, direction) {
+  if (!(this instanceof Doc)) { return new Doc(text, mode, firstLine, lineSep, direction) }
+  if (firstLine == null) { firstLine = 0 }
+
+  BranchChunk.call(this, [new LeafChunk([new Line("", null)])])
+  this.first = firstLine
+  this.scrollTop = this.scrollLeft = 0
+  this.cantEdit = false
+  this.cleanGeneration = 1
+  this.modeFrontier = this.highlightFrontier = firstLine
+  var start = Pos(firstLine, 0)
+  this.sel = simpleSelection(start)
+  this.history = new History(null)
+  this.id = ++nextDocId
+  this.modeOption = mode
+  this.lineSep = lineSep
+  this.direction = (direction == "rtl") ? "rtl" : "ltr"
+  this.extend = false
+
+  if (typeof text == "string") { text = this.splitLines(text) }
+  updateDoc(this, {from: start, to: start, text: text})
+  setSelection(this, simpleSelection(start), sel_dontScroll)
+}
+
+Doc.prototype = createObj(BranchChunk.prototype, {
+  constructor: Doc,
+  // Iterate over the document. Supports two forms -- with only one
+  // argument, it calls that for each line in the document. With
+  // three, it iterates over the range given by the first two (with
+  // the second being non-inclusive).
+  iter: function(from, to, op) {
+    if (op) { this.iterN(from - this.first, to - from, op) }
+    else { this.iterN(this.first, this.first + this.size, from) }
+  },
+
+  // Non-public interface for adding and removing lines.
+  insert: function(at, lines) {
+    var height = 0
+    for (var i = 0; i < lines.length; ++i) { height += lines[i].height }
+    this.insertInner(at - this.first, lines, height)
+  },
+  remove: function(at, n) { this.removeInner(at - this.first, n) },
+
+  // From here, the methods are part of the public interface. Most
+  // are also available from CodeMirror (editor) instances.
+
+  getValue: function(lineSep) {
+    var lines = getLines(this, this.first, this.first + this.size)
+    if (lineSep === false) { return lines }
+    return lines.join(lineSep || this.lineSeparator())
+  },
+  setValue: docMethodOp(function(code) {
+    var top = Pos(this.first, 0), last = this.first + this.size - 1
+    makeChange(this, {from: top, to: Pos(last, getLine(this, last).text.length),
+                      text: this.splitLines(code), origin: "setValue", full: true}, true)
+    if (this.cm) { scrollToCoords(this.cm, 0, 0) }
+    setSelection(this, simpleSelection(top), sel_dontScroll)
+  }),
+  replaceRange: function(code, from, to, origin) {
+    from = clipPos(this, from)
+    to = to ? clipPos(this, to) : from
+    replaceRange(this, code, from, to, origin)
+  },
+  getRange: function(from, to, lineSep) {
+    var lines = getBetween(this, clipPos(this, from), clipPos(this, to))
+    if (lineSep === false) { return lines }
+    return lines.join(lineSep || this.lineSeparator())
+  },
+
+  getLine: function(line) {var l = this.getLineHandle(line); return l && l.text},
+
+  getLineHandle: function(line) {if (isLine(this, line)) { return getLine(this, line) }},
+  getLineNumber: function(line) {return lineNo(line)},
+
+  getLineHandleVisualStart: function(line) {
+    if (typeof line == "number") { line = getLine(this, line) }
+    return visualLine(line)
+  },
+
+  lineCount: function() {return this.size},
+  firstLine: function() {return this.first},
+  lastLine: function() {return this.first + this.size - 1},
+
+  clipPos: function(pos) {return clipPos(this, pos)},
+
+  getCursor: function(start) {
+    var range = this.sel.primary(), pos
+    if (start == null || start == "head") { pos = range.head }
+    else if (start == "anchor") { pos = range.anchor }
+    else if (start == "end" || start == "to" || start === false) { pos = range.to() }
+    else { pos = range.from() }
+    return pos
+  },
+  listSelections: function() { return this.sel.ranges },
+  somethingSelected: function() {return this.sel.somethingSelected()},
+
+  setCursor: docMethodOp(function(line, ch, options) {
+    setSimpleSelection(this, clipPos(this, typeof line == "number" ? Pos(line, ch || 0) : line), null, options)
+  }),
+  setSelection: docMethodOp(function(anchor, head, options) {
+    setSimpleSelection(this, clipPos(this, anchor), clipPos(this, head || anchor), options)
+  }),
+  extendSelection: docMethodOp(function(head, other, options) {
+    extendSelection(this, clipPos(this, head), other && clipPos(this, other), options)
+  }),
+  extendSelections: docMethodOp(function(heads, options) {
+    extendSelections(this, clipPosArray(this, heads), options)
+  }),
+  extendSelectionsBy: docMethodOp(function(f, options) {
+    var heads = map(this.sel.ranges, f)
+    extendSelections(this, clipPosArray(this, heads), options)
+  }),
+  setSelections: docMethodOp(function(ranges, primary, options) {
+    var this$1 = this;
+
+    if (!ranges.length) { return }
+    var out = []
+    for (var i = 0; i < ranges.length; i++)
+      { out[i] = new Range(clipPos(this$1, ranges[i].anchor),
+                         clipPos(this$1, ranges[i].head)) }
+    if (primary == null) { primary = Math.min(ranges.length - 1, this.sel.primIndex) }
+    setSelection(this, normalizeSelection(out, primary), options)
+  }),
+  addSelection: docMethodOp(function(anchor, head, options) {
+    var ranges = this.sel.ranges.slice(0)
+    ranges.push(new Range(clipPos(this, anchor), clipPos(this, head || anchor)))
+    setSelection(this, normalizeSelection(ranges, ranges.length - 1), options)
+  }),
+
+  getSelection: function(lineSep) {
+    var this$1 = this;
+
+    var ranges = this.sel.ranges, lines
+    for (var i = 0; i < ranges.length; i++) {
+      var sel = getBetween(this$1, ranges[i].from(), ranges[i].to())
+      lines = lines ? lines.concat(sel) : sel
+    }
+    if (lineSep === false) { return lines }
+    else { return lines.join(lineSep || this.lineSeparator()) }
+  },
+  getSelections: function(lineSep) {
+    var this$1 = this;
+
+    var parts = [], ranges = this.sel.ranges
+    for (var i = 0; i < ranges.length; i++) {
+      var sel = getBetween(this$1, ranges[i].from(), ranges[i].to())
+      if (lineSep !== false) { sel = sel.join(lineSep || this$1.lineSeparator()) }
+      parts[i] = sel
+    }
+    return parts
+  },
+  replaceSelection: function(code, collapse, origin) {
+    var dup = []
+    for (var i = 0; i < this.sel.ranges.length; i++)
+      { dup[i] = code }
+    this.replaceSelections(dup, collapse, origin || "+input")
+  },
+  replaceSelections: docMethodOp(function(code, collapse, origin) {
+    var this$1 = this;
+
+    var changes = [], sel = this.sel
+    for (var i = 0; i < sel.ranges.length; i++) {
+      var range = sel.ranges[i]
+      changes[i] = {from: range.from(), to: range.to(), text: this$1.splitLines(code[i]), origin: origin}
+    }
+    var newSel = collapse && collapse != "end" && computeReplacedSel(this, changes, collapse)
+    for (var i$1 = changes.length - 1; i$1 >= 0; i$1--)
+      { makeChange(this$1, changes[i$1]) }
+    if (newSel) { setSelectionReplaceHistory(this, newSel) }
+    else if (this.cm) { ensureCursorVisible(this.cm) }
+  }),
+  undo: docMethodOp(function() {makeChangeFromHistory(this, "undo")}),
+  redo: docMethodOp(function() {makeChangeFromHistory(this, "redo")}),
+  undoSelection: docMethodOp(function() {makeChangeFromHistory(this, "undo", true)}),
+  redoSelection: docMethodOp(function() {makeChangeFromHistory(this, "redo", true)}),
+
+  setExtending: function(val) {this.extend = val},
+  getExtending: function() {return this.extend},
+
+  historySize: function() {
+    var hist = this.history, done = 0, undone = 0
+    for (var i = 0; i < hist.done.length; i++) { if (!hist.done[i].ranges) { ++done } }
+    for (var i$1 = 0; i$1 < hist.undone.length; i$1++) { if (!hist.undone[i$1].ranges) { ++undone } }
+    return {undo: done, redo: undone}
+  },
+  clearHistory: function() {this.history = new History(this.history.maxGeneration)},
+
+  markClean: function() {
+    this.cleanGeneration = this.changeGeneration(true)
+  },
+  changeGeneration: function(forceSplit) {
+    if (forceSplit)
+      { this.history.lastOp = this.history.lastSelOp = this.history.lastOrigin = null }
+    return this.history.generation
+  },
+  isClean: function (gen) {
+    return this.history.generation == (gen || this.cleanGeneration)
+  },
+
+  getHistory: function() {
+    return {done: copyHistoryArray(this.history.done),
+            undone: copyHistoryArray(this.history.undone)}
+  },
+  setHistory: function(histData) {
+    var hist = this.history = new History(this.history.maxGeneration)
+    hist.done = copyHistoryArray(histData.done.slice(0), null, true)
+    hist.undone = copyHistoryArray(histData.undone.slice(0), null, true)
+  },
+
+  setGutterMarker: docMethodOp(function(line, gutterID, value) {
+    return changeLine(this, line, "gutter", function (line) {
+      var markers = line.gutterMarkers || (line.gutterMarkers = {})
+      markers[gutterID] = value
+      if (!value && isEmpty(markers)) { line.gutterMarkers = null }
+      return true
+    })
+  }),
+
+  clearGutter: docMethodOp(function(gutterID) {
+    var this$1 = this;
+
+    this.iter(function (line) {
+      if (line.gutterMarkers && line.gutterMarkers[gutterID]) {
+        changeLine(this$1, line, "gutter", function () {
+          line.gutterMarkers[gutterID] = null
+          if (isEmpty(line.gutterMarkers)) { line.gutterMarkers = null }
+          return true
+        })
+      }
+    })
+  }),
+
+  lineInfo: function(line) {
+    var n
+    if (typeof line == "number") {
+      if (!isLine(this, line)) { return null }
+      n = line
+      line = getLine(this, line)
+      if (!line) { return null }
+    } else {
+      n = lineNo(line)
+      if (n == null) { return null }
+    }
+    return {line: n, handle: line, text: line.text, gutterMarkers: line.gutterMarkers,
+            textClass: line.textClass, bgClass: line.bgClass, wrapClass: line.wrapClass,
+            widgets: line.widgets}
+  },
+
+  addLineClass: docMethodOp(function(handle, where, cls) {
+    return changeLine(this, handle, where == "gutter" ? "gutter" : "class", function (line) {
+      var prop = where == "text" ? "textClass"
+               : where == "background" ? "bgClass"
+               : where == "gutter" ? "gutterClass" : "wrapClass"
+      if (!line[prop]) { line[prop] = cls }
+      else if (classTest(cls).test(line[prop])) { return false }
+      else { line[prop] += " " + cls }
+      return true
+    })
+  }),
+  removeLineClass: docMethodOp(function(handle, where, cls) {
+    return changeLine(this, handle, where == "gutter" ? "gutter" : "class", function (line) {
+      var prop = where == "text" ? "textClass"
+               : where == "background" ? "bgClass"
+               : where == "gutter" ? "gutterClass" : "wrapClass"
+      var cur = line[prop]
+      if (!cur) { return false }
+      else if (cls == null) { line[prop] = null }
+      else {
+        var found = cur.match(classTest(cls))
+        if (!found) { return false }
+        var end = found.index + found[0].length
+        line[prop] = cur.slice(0, found.index) + (!found.index || end == cur.length ? "" : " ") + cur.slice(end) || null
+      }
+      return true
+    })
+  }),
+
+  addLineWidget: docMethodOp(function(handle, node, options) {
+    return addLineWidget(this, handle, node, options)
+  }),
+  removeLineWidget: function(widget) { widget.clear() },
+
+  markText: function(from, to, options) {
+    return markText(this, clipPos(this, from), clipPos(this, to), options, options && options.type || "range")
+  },
+  setBookmark: function(pos, options) {
+    var realOpts = {replacedWith: options && (options.nodeType == null ? options.widget : options),
+                    insertLeft: options && options.insertLeft,
+                    clearWhenEmpty: false, shared: options && options.shared,
+                    handleMouseEvents: options && options.handleMouseEvents}
+    pos = clipPos(this, pos)
+    return markText(this, pos, pos, realOpts, "bookmark")
+  },
+  findMarksAt: function(pos) {
+    pos = clipPos(this, pos)
+    var markers = [], spans = getLine(this, pos.line).markedSpans
+    if (spans) { for (var i = 0; i < spans.length; ++i) {
+      var span = spans[i]
+      if ((span.from == null || span.from <= pos.ch) &&
+          (span.to == null || span.to >= pos.ch))
+        { markers.push(span.marker.parent || span.marker) }
+    } }
+    return markers
+  },
+  findMarks: function(from, to, filter) {
+    from = clipPos(this, from); to = clipPos(this, to)
+    var found = [], lineNo = from.line
+    this.iter(from.line, to.line + 1, function (line) {
+      var spans = line.markedSpans
+      if (spans) { for (var i = 0; i < spans.length; i++) {
+        var span = spans[i]
+        if (!(span.to != null && lineNo == from.line && from.ch >= span.to ||
+              span.from == null && lineNo != from.line ||
+              span.from != null && lineNo == to.line && span.from >= to.ch) &&
+            (!filter || filter(span.marker)))
+          { found.push(span.marker.parent || span.marker) }
+      } }
+      ++lineNo
+    })
+    return found
+  },
+  getAllMarks: function() {
+    var markers = []
+    this.iter(function (line) {
+      var sps = line.markedSpans
+      if (sps) { for (var i = 0; i < sps.length; ++i)
+        { if (sps[i].from != null) { markers.push(sps[i].marker) } } }
+    })
+    return markers
+  },
+
+  posFromIndex: function(off) {
+    var ch, lineNo = this.first, sepSize = this.lineSeparator().length
+    this.iter(function (line) {
+      var sz = line.text.length + sepSize
+      if (sz > off) { ch = off; return true }
+      off -= sz
+      ++lineNo
+    })
+    return clipPos(this, Pos(lineNo, ch))
+  },
+  indexFromPos: function (coords) {
+    coords = clipPos(this, coords)
+    var index = coords.ch
+    if (coords.line < this.first || coords.ch < 0) { return 0 }
+    var sepSize = this.lineSeparator().length
+    this.iter(this.first, coords.line, function (line) { // iter aborts when callback returns a truthy value
+      index += line.text.length + sepSize
+    })
+    return index
+  },
+
+  copy: function(copyHistory) {
+    var doc = new Doc(getLines(this, this.first, this.first + this.size),
+                      this.modeOption, this.first, this.lineSep, this.direction)
+    doc.scrollTop = this.scrollTop; doc.scrollLeft = this.scrollLeft
+    doc.sel = this.sel
+    doc.extend = false
+    if (copyHistory) {
+      doc.history.undoDepth = this.history.undoDepth
+      doc.setHistory(this.getHistory())
+    }
+    return doc
+  },
+
+  linkedDoc: function(options) {
+    if (!options) { options = {} }
+    var from = this.first, to = this.first + this.size
+    if (options.from != null && options.from > from) { from = options.from }
+    if (options.to != null && options.to < to) { to = options.to }
+    var copy = new Doc(getLines(this, from, to), options.mode || this.modeOption, from, this.lineSep, this.direction)
+    if (options.sharedHist) { copy.history = this.history
+    ; }(this.linked || (this.linked = [])).push({doc: copy, sharedHist: options.sharedHist})
+    copy.linked = [{doc: this, isParent: true, sharedHist: options.sharedHist}]
+    copySharedMarkers(copy, findSharedMarkers(this))
+    return copy
+  },
+  unlinkDoc: function(other) {
+    var this$1 = this;
+
+    if (other instanceof CodeMirror) { other = other.doc }
+    if (this.linked) { for (var i = 0; i < this.linked.length; ++i) {
+      var link = this$1.linked[i]
+      if (link.doc != other) { continue }
+      this$1.linked.splice(i, 1)
+      other.unlinkDoc(this$1)
+      detachSharedMarkers(findSharedMarkers(this$1))
+      break
+    } }
+    // If the histories were shared, split them again
+    if (other.history == this.history) {
+      var splitIds = [other.id]
+      linkedDocs(other, function (doc) { return splitIds.push(doc.id); }, true)
+      other.history = new History(null)
+      other.history.done = copyHistoryArray(this.history.done, splitIds)
+      other.history.undone = copyHistoryArray(this.history.undone, splitIds)
+    }
+  },
+  iterLinkedDocs: function(f) {linkedDocs(this, f)},
+
+  getMode: function() {return this.mode},
+  getEditor: function() {return this.cm},
+
+  splitLines: function(str) {
+    if (this.lineSep) { return str.split(this.lineSep) }
+    return splitLinesAuto(str)
+  },
+  lineSeparator: function() { return this.lineSep || "\n" },
+
+  setDirection: docMethodOp(function (dir) {
+    if (dir != "rtl") { dir = "ltr" }
+    if (dir == this.direction) { return }
+    this.direction = dir
+    this.iter(function (line) { return line.order = null; })
+    if (this.cm) { directionChanged(this.cm) }
+  })
+})
+
+// Public alias.
+Doc.prototype.eachLine = Doc.prototype.iter
+
+// Kludge to work around strange IE behavior where it'll sometimes
+// re-fire a series of drag-related events right after the drop (#1551)
+var lastDrop = 0
+
+function onDrop(e) {
+  var cm = this
+  clearDragCursor(cm)
+  if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e))
+    { return }
+  e_preventDefault(e)
+  if (ie) { lastDrop = +new Date }
+  var pos = posFromMouse(cm, e, true), files = e.dataTransfer.files
+  if (!pos || cm.isReadOnly()) { return }
+  // Might be a file drop, in which case we simply extract the text
+  // and insert it.
+  if (files && files.length && window.FileReader && window.File) {
+    var n = files.length, text = Array(n), read = 0
+    var loadFile = function (file, i) {
+      if (cm.options.allowDropFileTypes &&
+          indexOf(cm.options.allowDropFileTypes, file.type) == -1)
+        { return }
+
+      var reader = new FileReader
+      reader.onload = operation(cm, function () {
+        var content = reader.result
+        if (/[\x00-\x08\x0e-\x1f]{2}/.test(content)) { content = "" }
+        text[i] = content
+        if (++read == n) {
+          pos = clipPos(cm.doc, pos)
+          var change = {from: pos, to: pos,
+                        text: cm.doc.splitLines(text.join(cm.doc.lineSeparator())),
+                        origin: "paste"}
+          makeChange(cm.doc, change)
+          setSelectionReplaceHistory(cm.doc, simpleSelection(pos, changeEnd(change)))
+        }
+      })
+      reader.readAsText(file)
+    }
+    for (var i = 0; i < n; ++i) { loadFile(files[i], i) }
+  } else { // Normal drop
+    // Don't do a replace if the drop happened inside of the selected text.
+    if (cm.state.draggingText && cm.doc.sel.contains(pos) > -1) {
+      cm.state.draggingText(e)
+      // Ensure the editor is re-focused
+      setTimeout(function () { return cm.display.input.focus(); }, 20)
+      return
+    }
+    try {
+      var text$1 = e.dataTransfer.getData("Text")
+      if (text$1) {
+        var selected
+        if (cm.state.draggingText && !cm.state.draggingText.copy)
+          { selected = cm.listSelections() }
+        setSelectionNoUndo(cm.doc, simpleSelection(pos, pos))
+        if (selected) { for (var i$1 = 0; i$1 < selected.length; ++i$1)
+          { replaceRange(cm.doc, "", selected[i$1].anchor, selected[i$1].head, "drag") } }
+        cm.replaceSelection(text$1, "around", "paste")
+        cm.display.input.focus()
+      }
+    }
+    catch(e){}
+  }
+}
+
+function onDragStart(cm, e) {
+  if (ie && (!cm.state.draggingText || +new Date - lastDrop < 100)) { e_stop(e); return }
+  if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e)) { return }
+
+  e.dataTransfer.setData("Text", cm.getSelection())
+  e.dataTransfer.effectAllowed = "copyMove"
+
+  // Use dummy image instead of default browsers image.
+  // Recent Safari (~6.0.2) have a tendency to segfault when this happens, so we don't do it there.
+  if (e.dataTransfer.setDragImage && !safari) {
+    var img = elt("img", null, null, "position: fixed; left: 0; top: 0;")
+    img.src = "data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="
+    if (presto) {
+      img.width = img.height = 1
+      cm.display.wrapper.appendChild(img)
+      // Force a relayout, or Opera won't use our image for some obscure reason
+      img._top = img.offsetTop
+    }
+    e.dataTransfer.setDragImage(img, 0, 0)
+    if (presto) { img.parentNode.removeChild(img) }
+  }
+}
+
+function onDragOver(cm, e) {
+  var pos = posFromMouse(cm, e)
+  if (!pos) { return }
+  var frag = document.createDocumentFragment()
+  drawSelectionCursor(cm, pos, frag)
+  if (!cm.display.dragCursor) {
+    cm.display.dragCursor = elt("div", null, "CodeMirror-cursors CodeMirror-dragcursors")
+    cm.display.lineSpace.insertBefore(cm.display.dragCursor, cm.display.cursorDiv)
+  }
+  removeChildrenAndAdd(cm.display.dragCursor, frag)
+}
+
+function clearDragCursor(cm) {
+  if (cm.display.dragCursor) {
+    cm.display.lineSpace.removeChild(cm.display.dragCursor)
+    cm.display.dragCursor = null
+  }
+}
+
+// These must be handled carefully, because naively registering a
+// handler for each editor will cause the editors to never be
+// garbage collected.
+
+function forEachCodeMirror(f) {
+  if (!document.getElementsByClassName) { return }
+  var byClass = document.getElementsByClassName("CodeMirror")
+  for (var i = 0; i < byClass.length; i++) {
+    var cm = byClass[i].CodeMirror
+    if (cm) { f(cm) }
+  }
+}
+
+var globalsRegistered = false
+function ensureGlobalHandlers() {
+  if (globalsRegistered) { return }
+  registerGlobalHandlers()
+  globalsRegistered = true
+}
+function registerGlobalHandlers() {
+  // When the window resizes, we need to refresh active editors.
+  var resizeTimer
+  on(window, "resize", function () {
+    if (resizeTimer == null) { resizeTimer = setTimeout(function () {
+      resizeTimer = null
+      forEachCodeMirror(onResize)
+    }, 100) }
+  })
+  // When the window loses focus, we want to show the editor as blurred
+  on(window, "blur", function () { return forEachCodeMirror(onBlur); })
+}
+// Called when the window resizes
+function onResize(cm) {
+  var d = cm.display
+  if (d.lastWrapHeight == d.wrapper.clientHeight && d.lastWrapWidth == d.wrapper.clientWidth)
+    { return }
+  // Might be a text scaling operation, clear size caches.
+  d.cachedCharWidth = d.cachedTextHeight = d.cachedPaddingH = null
+  d.scrollbarsClipped = false
+  cm.setSize()
+}
+
+var keyNames = {
+  3: "Enter", 8: "Backspace", 9: "Tab", 13: "Enter", 16: "Shift", 17: "Ctrl", 18: "Alt",
+  19: "Pause", 20: "CapsLock", 27: "Esc", 32: "Space", 33: "PageUp", 34: "PageDown", 35: "End",
+  36: "Home", 37: "Left", 38: "Up", 39: "Right", 40: "Down", 44: "PrintScrn", 45: "Insert",
+  46: "Delete", 59: ";", 61: "=", 91: "Mod", 92: "Mod", 93: "Mod",
+  106: "*", 107: "=", 109: "-", 110: ".", 111: "/", 127: "Delete",
+  173: "-", 186: ";", 187: "=", 188: ",", 189: "-", 190: ".", 191: "/", 192: "`", 219: "[", 220: "\\",
+  221: "]", 222: "'", 63232: "Up", 63233: "Down", 63234: "Left", 63235: "Right", 63272: "Delete",
+  63273: "Home", 63275: "End", 63276: "PageUp", 63277: "PageDown", 63302: "Insert"
+}
+
+// Number keys
+for (var i = 0; i < 10; i++) { keyNames[i + 48] = keyNames[i + 96] = String(i) }
+// Alphabetic keys
+for (var i$1 = 65; i$1 <= 90; i$1++) { keyNames[i$1] = String.fromCharCode(i$1) }
+// Function keys
+for (var i$2 = 1; i$2 <= 12; i$2++) { keyNames[i$2 + 111] = keyNames[i$2 + 63235] = "F" + i$2 }
+
+var keyMap = {}
+
+keyMap.basic = {
+  "Left": "goCharLeft", "Right": "goCharRight", "Up": "goLineUp", "Down": "goLineDown",
+  "End": "goLineEnd", "Home": "goLineStartSmart", "PageUp": "goPageUp", "PageDown": "goPageDown",
+  "Delete": "delCharAfter", "Backspace": "delCharBefore", "Shift-Backspace": "delCharBefore",
+  "Tab": "defaultTab", "Shift-Tab": "indentAuto",
+  "Enter": "newlineAndIndent", "Insert": "toggleOverwrite",
+  "Esc": "singleSelection"
+}
+// Note that the save and find-related commands aren't defined by
+// default. User code or addons can define them. Unknown commands
+// are simply ignored.
+keyMap.pcDefault = {
+  "Ctrl-A": "selectAll", "Ctrl-D": "deleteLine", "Ctrl-Z": "undo", "Shift-Ctrl-Z": "redo", "Ctrl-Y": "redo",
+  "Ctrl-Home": "goDocStart", "Ctrl-End": "goDocEnd", "Ctrl-Up": "goLineUp", "Ctrl-Down": "goLineDown",
+  "Ctrl-Left": "goGroupLeft", "Ctrl-Right": "goGroupRight", "Alt-Left": "goLineStart", "Alt-Right": "goLineEnd",
+  "Ctrl-Backspace": "delGroupBefore", "Ctrl-Delete": "delGroupAfter", "Ctrl-S": "save", "Ctrl-F": "find",
+  "Ctrl-G": "findNext", "Shift-Ctrl-G": "findPrev", "Shift-Ctrl-F": "replace", "Shift-Ctrl-R": "replaceAll",
+  "Ctrl-[": "indentLess", "Ctrl-]": "indentMore",
+  "Ctrl-U": "undoSelection", "Shift-Ctrl-U": "redoSelection", "Alt-U": "redoSelection",
+  fallthrough: "basic"
+}
+// Very basic readline/emacs-style bindings, which are standard on Mac.
+keyMap.emacsy = {
+  "Ctrl-F": "goCharRight", "Ctrl-B": "goCharLeft", "Ctrl-P": "goLineUp", "Ctrl-N": "goLineDown",
+  "Alt-F": "goWordRight", "Alt-B": "goWordLeft", "Ctrl-A": "goLineStart", "Ctrl-E": "goLineEnd",
+  "Ctrl-V": "goPageDown", "Shift-Ctrl-V": "goPageUp", "Ctrl-D": "delCharAfter", "Ctrl-H": "delCharBefore",
+  "Alt-D": "delWordAfter", "Alt-Backspace": "delWordBefore", "Ctrl-K": "killLine", "Ctrl-T": "transposeChars",
+  "Ctrl-O": "openLine"
+}
+keyMap.macDefault = {
+  "Cmd-A": "selectAll", "Cmd-D": "deleteLine", "Cmd-Z": "undo", "Shift-Cmd-Z": "redo", "Cmd-Y": "redo",
+  "Cmd-Home": "goDocStart", "Cmd-Up": "goDocStart", "Cmd-End": "goDocEnd", "Cmd-Down": "goDocEnd", "Alt-Left": "goGroupLeft",
+  "Alt-Right": "goGroupRight", "Cmd-Left": "goLineLeft", "Cmd-Right": "goLineRight", "Alt-Backspace": "delGroupBefore",
+  "Ctrl-Alt-Backspace": "delGroupAfter", "Alt-Delete": "delGroupAfter", "Cmd-S": "save", "Cmd-F": "find",
+  "Cmd-G": "findNext", "Shift-Cmd-G": "findPrev", "Cmd-Alt-F": "replace", "Shift-Cmd-Alt-F": "replaceAll",
+  "Cmd-[": "indentLess", "Cmd-]": "indentMore", "Cmd-Backspace": "delWrappedLineLeft", "Cmd-Delete": "delWrappedLineRight",
+  "Cmd-U": "undoSelection", "Shift-Cmd-U": "redoSelection", "Ctrl-Up": "goDocStart", "Ctrl-Down": "goDocEnd",
+  fallthrough: ["basic", "emacsy"]
+}
+keyMap["default"] = mac ? keyMap.macDefault : keyMap.pcDefault
+
+// KEYMAP DISPATCH
+
+function normalizeKeyName(name) {
+  var parts = name.split(/-(?!$)/)
+  name = parts[parts.length - 1]
+  var alt, ctrl, shift, cmd
+  for (var i = 0; i < parts.length - 1; i++) {
+    var mod = parts[i]
+    if (/^(cmd|meta|m)$/i.test(mod)) { cmd = true }
+    else if (/^a(lt)?$/i.test(mod)) { alt = true }
+    else if (/^(c|ctrl|control)$/i.test(mod)) { ctrl = true }
+    else if (/^s(hift)?$/i.test(mod)) { shift = true }
+    else { throw new Error("Unrecognized modifier name: " + mod) }
+  }
+  if (alt) { name = "Alt-" + name }
+  if (ctrl) { name = "Ctrl-" + name }
+  if (cmd) { name = "Cmd-" + name }
+  if (shift) { name = "Shift-" + name }
+  return name
+}
+
+// This is a kludge to keep keymaps mostly working as raw objects
+// (backwards compatibility) while at the same time support features
+// like normalization and multi-stroke key bindings. It compiles a
+// new normalized keymap, and then updates the old object to reflect
+// this.
+function normalizeKeyMap(keymap) {
+  var copy = {}
+  for (var keyname in keymap) { if (keymap.hasOwnProperty(keyname)) {
+    var value = keymap[keyname]
+    if (/^(name|fallthrough|(de|at)tach)$/.test(keyname)) { continue }
+    if (value == "...") { delete keymap[keyname]; continue }
+
+    var keys = map(keyname.split(" "), normalizeKeyName)
+    for (var i = 0; i < keys.length; i++) {
+      var val = (void 0), name = (void 0)
+      if (i == keys.length - 1) {
+        name = keys.join(" ")
+        val = value
+      } else {
+        name = keys.slice(0, i + 1).join(" ")
+        val = "..."
+      }
+      var prev = copy[name]
+      if (!prev) { copy[name] = val }
+      else if (prev != val) { throw new Error("Inconsistent bindings for " + name) }
+    }
+    delete keymap[keyname]
+  } }
+  for (var prop in copy) { keymap[prop] = copy[prop] }
+  return keymap
+}
+
+function lookupKey(key, map, handle, context) {
+  map = getKeyMap(map)
+  var found = map.call ? map.call(key, context) : map[key]
+  if (found === false) { return "nothing" }
+  if (found === "...") { return "multi" }
+  if (found != null && handle(found)) { return "handled" }
+
+  if (map.fallthrough) {
+    if (Object.prototype.toString.call(map.fallthrough) != "[object Array]")
+      { return lookupKey(key, map.fallthrough, handle, context) }
+    for (var i = 0; i < map.fallthrough.length; i++) {
+      var result = lookupKey(key, map.fallthrough[i], handle, context)
+      if (result) { return result }
+    }
+  }
+}
+
+// Modifier key presses don't count as 'real' key presses for the
+// purpose of keymap fallthrough.
+function isModifierKey(value) {
+  var name = typeof value == "string" ? value : keyNames[value.keyCode]
+  return name == "Ctrl" || name == "Alt" || name == "Shift" || name == "Mod"
+}
+
+function addModifierNames(name, event, noShift) {
+  var base = name
+  if (event.altKey && base != "Alt") { name = "Alt-" + name }
+  if ((flipCtrlCmd ? event.metaKey : event.ctrlKey) && base != "Ctrl") { name = "Ctrl-" + name }
+  if ((flipCtrlCmd ? event.ctrlKey : event.metaKey) && base != "Cmd") { name = "Cmd-" + name }
+  if (!noShift && event.shiftKey && base != "Shift") { name = "Shift-" + name }
+  return name
+}
+
+// Look up the name of a key as indicated by an event object.
+function keyName(event, noShift) {
+  if (presto && event.keyCode == 34 && event["char"]) { return false }
+  var name = keyNames[event.keyCode]
+  if (name == null || event.altGraphKey) { return false }
+  return addModifierNames(name, event, noShift)
+}
+
+function getKeyMap(val) {
+  return typeof val == "string" ? keyMap[val] : val
+}
+
+// Helper for deleting text near the selection(s), used to implement
+// backspace, delete, and similar functionality.
+function deleteNearSelection(cm, compute) {
+  var ranges = cm.doc.sel.ranges, kill = []
+  // Build up a set of ranges to kill first, merging overlapping
+  // ranges.
+  for (var i = 0; i < ranges.length; i++) {
+    var toKill = compute(ranges[i])
+    while (kill.length && cmp(toKill.from, lst(kill).to) <= 0) {
+      var replaced = kill.pop()
+      if (cmp(replaced.from, toKill.from) < 0) {
+        toKill.from = replaced.from
+        break
+      }
+    }
+    kill.push(toKill)
+  }
+  // Next, remove those actual ranges.
+  runInOp(cm, function () {
+    for (var i = kill.length - 1; i >= 0; i--)
+      { replaceRange(cm.doc, "", kill[i].from, kill[i].to, "+delete") }
+    ensureCursorVisible(cm)
+  })
+}
+
+function moveCharLogically(line, ch, dir) {
+  var target = skipExtendingChars(line.text, ch + dir, dir)
+  return target < 0 || target > line.text.length ? null : target
+}
+
+function moveLogically(line, start, dir) {
+  var ch = moveCharLogically(line, start.ch, dir)
+  return ch == null ? null : new Pos(start.line, ch, dir < 0 ? "after" : "before")
+}
+
+function endOfLine(visually, cm, lineObj, lineNo, dir) {
+  if (visually) {
+    var order = getOrder(lineObj, cm.doc.direction)
+    if (order) {
+      var part = dir < 0 ? lst(order) : order[0]
+      var moveInStorageOrder = (dir < 0) == (part.level == 1)
+      var sticky = moveInStorageOrder ? "after" : "before"
+      var ch
+      // With a wrapped rtl chunk (possibly spanning multiple bidi parts),
+      // it could be that the last bidi part is not on the last visual line,
+      // since visual lines contain content order-consecutive chunks.
+      // Thus, in rtl, we are looking for the first (content-order) character
+      // in the rtl chunk that is on the last line (that is, the same line
+      // as the last (content-order) character).
+      if (part.level > 0) {
+        var prep = prepareMeasureForLine(cm, lineObj)
+        ch = dir < 0 ? lineObj.text.length - 1 : 0
+        var targetTop = measureCharPrepared(cm, prep, ch).top
+        ch = findFirst(function (ch) { return measureCharPrepared(cm, prep, ch).top == targetTop; }, (dir < 0) == (part.level == 1) ? part.from : part.to - 1, ch)
+        if (sticky == "before") { ch = moveCharLogically(lineObj, ch, 1) }
+      } else { ch = dir < 0 ? part.to : part.from }
+      return new Pos(lineNo, ch, sticky)
+    }
+  }
+  return new Pos(lineNo, dir < 0 ? lineObj.text.length : 0, dir < 0 ? "before" : "after")
+}
+
+function moveVisually(cm, line, start, dir) {
+  var bidi = getOrder(line, cm.doc.direction)
+  if (!bidi) { return moveLogically(line, start, dir) }
+  if (start.ch >= line.text.length) {
+    start.ch = line.text.length
+    start.sticky = "before"
+  } else if (start.ch <= 0) {
+    start.ch = 0
+    start.sticky = "after"
+  }
+  var partPos = getBidiPartAt(bidi, start.ch, start.sticky), part = bidi[partPos]
+  if (cm.doc.direction == "ltr" && part.level % 2 == 0 && (dir > 0 ? part.to > start.ch : part.from < start.ch)) {
+    // Case 1: We move within an ltr part in an ltr editor. Even with wrapped lines,
+    // nothing interesting happens.
+    return moveLogically(line, start, dir)
+  }
+
+  var mv = function (pos, dir) { return moveCharLogically(line, pos instanceof Pos ? pos.ch : pos, dir); }
+  var prep
+  var getWrappedLineExtent = function (ch) {
+    if (!cm.options.lineWrapping) { return {begin: 0, end: line.text.length} }
+    prep = prep || prepareMeasureForLine(cm, line)
+    return wrappedLineExtentChar(cm, line, prep, ch)
+  }
+  var wrappedLineExtent = getWrappedLineExtent(start.sticky == "before" ? mv(start, -1) : start.ch)
+
+  if (cm.doc.direction == "rtl" || part.level == 1) {
+    var moveInStorageOrder = (part.level == 1) == (dir < 0)
+    var ch = mv(start, moveInStorageOrder ? 1 : -1)
+    if (ch != null && (!moveInStorageOrder ? ch >= part.from && ch >= wrappedLineExtent.begin : ch <= part.to && ch <= wrappedLineExtent.end)) {
+      // Case 2: We move within an rtl part or in an rtl editor on the same visual line
+      var sticky = moveInStorageOrder ? "before" : "after"
+      return new Pos(start.line, ch, sticky)
+    }
+  }
+
+  // Case 3: Could not move within this bidi part in this visual line, so leave
+  // the current bidi part
+
+  var searchInVisualLine = function (partPos, dir, wrappedLineExtent) {
+    var getRes = function (ch, moveInStorageOrder) { return moveInStorageOrder
+      ? new Pos(start.line, mv(ch, 1), "before")
+      : new Pos(start.line, ch, "after"); }
+
+    for (; partPos >= 0 && partPos < bidi.length; partPos += dir) {
+      var part = bidi[partPos]
+      var moveInStorageOrder = (dir > 0) == (part.level != 1)
+      var ch = moveInStorageOrder ? wrappedLineExtent.begin : mv(wrappedLineExtent.end, -1)
+      if (part.from <= ch && ch < part.to) { return getRes(ch, moveInStorageOrder) }
+      ch = moveInStorageOrder ? part.from : mv(part.to, -1)
+      if (wrappedLineExtent.begin <= ch && ch < wrappedLineExtent.end) { return getRes(ch, moveInStorageOrder) }
+    }
+  }
+
+  // Case 3a: Look for other bidi parts on the same visual line
+  var res = searchInVisualLine(partPos + dir, dir, wrappedLineExtent)
+  if (res) { return res }
+
+  // Case 3b: Look for other bidi parts on the next visual line
+  var nextCh = dir > 0 ? wrappedLineExtent.end : mv(wrappedLineExtent.begin, -1)
+  if (nextCh != null && !(dir > 0 && nextCh == line.text.length)) {
+    res = searchInVisualLine(dir > 0 ? 0 : bidi.length - 1, dir, getWrappedLineExtent(nextCh))
+    if (res) { return res }
+  }
+
+  // Case 4: Nowhere to move
+  return null
+}
+
+// Commands are parameter-less actions that can be performed on an
+// editor, mostly used for keybindings.
+var commands = {
+  selectAll: selectAll,
+  singleSelection: function (cm) { return cm.setSelection(cm.getCursor("anchor"), cm.getCursor("head"), sel_dontScroll); },
+  killLine: function (cm) { return deleteNearSelection(cm, function (range) {
+    if (range.empty()) {
+      var len = getLine(cm.doc, range.head.line).text.length
+      if (range.head.ch == len && range.head.line < cm.lastLine())
+        { return {from: range.head, to: Pos(range.head.line + 1, 0)} }
+      else
+        { return {from: range.head, to: Pos(range.head.line, len)} }
+    } else {
+      return {from: range.from(), to: range.to()}
+    }
+  }); },
+  deleteLine: function (cm) { return deleteNearSelection(cm, function (range) { return ({
+    from: Pos(range.from().line, 0),
+    to: clipPos(cm.doc, Pos(range.to().line + 1, 0))
+  }); }); },
+  delLineLeft: function (cm) { return deleteNearSelection(cm, function (range) { return ({
+    from: Pos(range.from().line, 0), to: range.from()
+  }); }); },
+  delWrappedLineLeft: function (cm) { return deleteNearSelection(cm, function (range) {
+    var top = cm.charCoords(range.head, "div").top + 5
+    var leftPos = cm.coordsChar({left: 0, top: top}, "div")
+    return {from: leftPos, to: range.from()}
+  }); },
+  delWrappedLineRight: function (cm) { return deleteNearSelection(cm, function (range) {
+    var top = cm.charCoords(range.head, "div").top + 5
+    var rightPos = cm.coordsChar({left: cm.display.lineDiv.offsetWidth + 100, top: top}, "div")
+    return {from: range.from(), to: rightPos }
+  }); },
+  undo: function (cm) { return cm.undo(); },
+  redo: function (cm) { return cm.redo(); },
+  undoSelection: function (cm) { return cm.undoSelection(); },
+  redoSelection: function (cm) { return cm.redoSelection(); },
+  goDocStart: function (cm) { return cm.extendSelection(Pos(cm.firstLine(), 0)); },
+  goDocEnd: function (cm) { return cm.extendSelection(Pos(cm.lastLine())); },
+  goLineStart: function (cm) { return cm.extendSelectionsBy(function (range) { return lineStart(cm, range.head.line); },
+    {origin: "+move", bias: 1}
+  ); },
+  goLineStartSmart: function (cm) { return cm.extendSelectionsBy(function (range) { return lineStartSmart(cm, range.head); },
+    {origin: "+move", bias: 1}
+  ); },
+  goLineEnd: function (cm) { return cm.extendSelectionsBy(function (range) { return lineEnd(cm, range.head.line); },
+    {origin: "+move", bias: -1}
+  ); },
+  goLineRight: function (cm) { return cm.extendSelectionsBy(function (range) {
+    var top = cm.cursorCoords(range.head, "div").top + 5
+    return cm.coordsChar({left: cm.display.lineDiv.offsetWidth + 100, top: top}, "div")
+  }, sel_move); },
+  goLineLeft: function (cm) { return cm.extendSelectionsBy(function (range) {
+    var top = cm.cursorCoords(range.head, "div").top + 5
+    return cm.coordsChar({left: 0, top: top}, "div")
+  }, sel_move); },
+  goLineLeftSmart: function (cm) { return cm.extendSelectionsBy(function (range) {
+    var top = cm.cursorCoords(range.head, "div").top + 5
+    var pos = cm.coordsChar({left: 0, top: top}, "div")
+    if (pos.ch < cm.getLine(pos.line).search(/\S/)) { return lineStartSmart(cm, range.head) }
+    return pos
+  }, sel_move); },
+  goLineUp: function (cm) { return cm.moveV(-1, "line"); },
+  goLineDown: function (cm) { return cm.moveV(1, "line"); },
+  goPageUp: function (cm) { return cm.moveV(-1, "page"); },
+  goPageDown: function (cm) { return cm.moveV(1, "page"); },
+  goCharLeft: function (cm) { return cm.moveH(-1, "char"); },
+  goCharRight: function (cm) { return cm.moveH(1, "char"); },
+  goColumnLeft: function (cm) { return cm.moveH(-1, "column"); },
+  goColumnRight: function (cm) { return cm.moveH(1, "column"); },
+  goWordLeft: function (cm) { return cm.moveH(-1, "word"); },
+  goGroupRight: function (cm) { return cm.moveH(1, "group"); },
+  goGroupLeft: function (cm) { return cm.moveH(-1, "group"); },
+  goWordRight: function (cm) { return cm.moveH(1, "word"); },
+  delCharBefore: function (cm) { return cm.deleteH(-1, "char"); },
+  delCharAfter: function (cm) { return cm.deleteH(1, "char"); },
+  delWordBefore: function (cm) { return cm.deleteH(-1, "word"); },
+  delWordAfter: function (cm) { return cm.deleteH(1, "word"); },
+  delGroupBefore: function (cm) { return cm.deleteH(-1, "group"); },
+  delGroupAfter: function (cm) { return cm.deleteH(1, "group"); },
+  indentAuto: function (cm) { return cm.indentSelection("smart"); },
+  indentMore: function (cm) { return cm.indentSelection("add"); },
+  indentLess: function (cm) { return cm.indentSelection("subtract"); },
+  insertTab: function (cm) { return cm.replaceSelection("\t"); },
+  insertSoftTab: function (cm) {
+    var spaces = [], ranges = cm.listSelections(), tabSize = cm.options.tabSize
+    for (var i = 0; i < ranges.length; i++) {
+      var pos = ranges[i].from()
+      var col = countColumn(cm.getLine(pos.line), pos.ch, tabSize)
+      spaces.push(spaceStr(tabSize - col % tabSize))
+    }
+    cm.replaceSelections(spaces)
+  },
+  defaultTab: function (cm) {
+    if (cm.somethingSelected()) { cm.indentSelection("add") }
+    else { cm.execCommand("insertTab") }
+  },
+  // Swap the two chars left and right of each selection's head.
+  // Move cursor behind the two swapped characters afterwards.
+  //
+  // Doesn't consider line feeds a character.
+  // Doesn't scan more than one line above to find a character.
+  // Doesn't do anything on an empty line.
+  // Doesn't do anything with non-empty selections.
+  transposeChars: function (cm) { return runInOp(cm, function () {
+    var ranges = cm.listSelections(), newSel = []
+    for (var i = 0; i < ranges.length; i++) {
+      if (!ranges[i].empty()) { continue }
+      var cur = ranges[i].head, line = getLine(cm.doc, cur.line).text
+      if (line) {
+        if (cur.ch == line.length) { cur = new Pos(cur.line, cur.ch - 1) }
+        if (cur.ch > 0) {
+          cur = new Pos(cur.line, cur.ch + 1)
+          cm.replaceRange(line.charAt(cur.ch - 1) + line.charAt(cur.ch - 2),
+                          Pos(cur.line, cur.ch - 2), cur, "+transpose")
+        } else if (cur.line > cm.doc.first) {
+          var prev = getLine(cm.doc, cur.line - 1).text
+          if (prev) {
+            cur = new Pos(cur.line, 1)
+            cm.replaceRange(line.charAt(0) + cm.doc.lineSeparator() +
+                            prev.charAt(prev.length - 1),
+                            Pos(cur.line - 1, prev.length - 1), cur, "+transpose")
+          }
+        }
+      }
+      newSel.push(new Range(cur, cur))
+    }
+    cm.setSelections(newSel)
+  }); },
+  newlineAndIndent: function (cm) { return runInOp(cm, function () {
+    var sels = cm.listSelections()
+    for (var i = sels.length - 1; i >= 0; i--)
+      { cm.replaceRange(cm.doc.lineSeparator(), sels[i].anchor, sels[i].head, "+input") }
+    sels = cm.listSelections()
+    for (var i$1 = 0; i$1 < sels.length; i$1++)
+      { cm.indentLine(sels[i$1].from().line, null, true) }
+    ensureCursorVisible(cm)
+  }); },
+  openLine: function (cm) { return cm.replaceSelection("\n", "start"); },
+  toggleOverwrite: function (cm) { return cm.toggleOverwrite(); }
+}
+
+
+function lineStart(cm, lineN) {
+  var line = getLine(cm.doc, lineN)
+  var visual = visualLine(line)
+  if (visual != line) { lineN = lineNo(visual) }
+  return endOfLine(true, cm, visual, lineN, 1)
+}
+function lineEnd(cm, lineN) {
+  var line = getLine(cm.doc, lineN)
+  var visual = visualLineEnd(line)
+  if (visual != line) { lineN = lineNo(visual) }
+  return endOfLine(true, cm, line, lineN, -1)
+}
+function lineStartSmart(cm, pos) {
+  var start = lineStart(cm, pos.line)
+  var line = getLine(cm.doc, start.line)
+  var order = getOrder(line, cm.doc.direction)
+  if (!order || order[0].level == 0) {
+    var firstNonWS = Math.max(0, line.text.search(/\S/))
+    var inWS = pos.line == start.line && pos.ch <= firstNonWS && pos.ch
+    return Pos(start.line, inWS ? 0 : firstNonWS, start.sticky)
+  }
+  return start
+}
+
+// Run a handler that was bound to a key.
+function doHandleBinding(cm, bound, dropShift) {
+  if (typeof bound == "string") {
+    bound = commands[bound]
+    if (!bound) { return false }
+  }
+  // Ensure previous input has been read, so that the handler sees a
+  // consistent view of the document
+  cm.display.input.ensurePolled()
+  var prevShift = cm.display.shift, done = false
+  try {
+    if (cm.isReadOnly()) { cm.state.suppressEdits = true }
+    if (dropShift) { cm.display.shift = false }
+    done = bound(cm) != Pass
+  } finally {
+    cm.display.shift = prevShift
+    cm.state.suppressEdits = false
+  }
+  return done
+}
+
+function lookupKeyForEditor(cm, name, handle) {
+  for (var i = 0; i < cm.state.keyMaps.length; i++) {
+    var result = lookupKey(name, cm.state.keyMaps[i], handle, cm)
+    if (result) { return result }
+  }
+  return (cm.options.extraKeys && lookupKey(name, cm.options.extraKeys, handle, cm))
+    || lookupKey(name, cm.options.keyMap, handle, cm)
+}
+
+// Note that, despite the name, this function is also used to check
+// for bound mouse clicks.
+
+var stopSeq = new Delayed
+function dispatchKey(cm, name, e, handle) {
+  var seq = cm.state.keySeq
+  if (seq) {
+    if (isModifierKey(name)) { return "handled" }
+    stopSeq.set(50, function () {
+      if (cm.state.keySeq == seq) {
+        cm.state.keySeq = null
+        cm.display.input.reset()
+      }
+    })
+    name = seq + " " + name
+  }
+  var result = lookupKeyForEditor(cm, name, handle)
+
+  if (result == "multi")
+    { cm.state.keySeq = name }
+  if (result == "handled")
+    { signalLater(cm, "keyHandled", cm, name, e) }
+
+  if (result == "handled" || result == "multi") {
+    e_preventDefault(e)
+    restartBlink(cm)
+  }
+
+  if (seq && !result && /\'$/.test(name)) {
+    e_preventDefault(e)
+    return true
+  }
+  return !!result
+}
+
+// Handle a key from the keydown event.
+function handleKeyBinding(cm, e) {
+  var name = keyName(e, true)
+  if (!name) { return false }
+
+  if (e.shiftKey && !cm.state.keySeq) {
+    // First try to resolve full name (including 'Shift-'). Failing
+    // that, see if there is a cursor-motion command (starting with
+    // 'go') bound to the keyname without 'Shift-'.
+    return dispatchKey(cm, "Shift-" + name, e, function (b) { return doHandleBinding(cm, b, true); })
+        || dispatchKey(cm, name, e, function (b) {
+             if (typeof b == "string" ? /^go[A-Z]/.test(b) : b.motion)
+               { return doHandleBinding(cm, b) }
+           })
+  } else {
+    return dispatchKey(cm, name, e, function (b) { return doHandleBinding(cm, b); })
+  }
+}
+
+// Handle a key from the keypress event
+function handleCharBinding(cm, e, ch) {
+  return dispatchKey(cm, "'" + ch + "'", e, function (b) { return doHandleBinding(cm, b, true); })
+}
+
+var lastStoppedKey = null
+function onKeyDown(e) {
+  var cm = this
+  cm.curOp.focus = activeElt()
+  if (signalDOMEvent(cm, e)) { return }
+  // IE does strange things with escape.
+  if (ie && ie_version < 11 && e.keyCode == 27) { e.returnValue = false }
+  var code = e.keyCode
+  cm.display.shift = code == 16 || e.shiftKey
+  var handled = handleKeyBinding(cm, e)
+  if (presto) {
+    lastStoppedKey = handled ? code : null
+    // Opera has no cut event... we try to at least catch the key combo
+    if (!handled && code == 88 && !hasCopyEvent && (mac ? e.metaKey : e.ctrlKey))
+      { cm.replaceSelection("", null, "cut") }
+  }
+
+  // Turn mouse into crosshair when Alt is held on Mac.
+  if (code == 18 && !/\bCodeMirror-crosshair\b/.test(cm.display.lineDiv.className))
+    { showCrossHair(cm) }
+}
+
+function showCrossHair(cm) {
+  var lineDiv = cm.display.lineDiv
+  addClass(lineDiv, "CodeMirror-crosshair")
+
+  function up(e) {
+    if (e.keyCode == 18 || !e.altKey) {
+      rmClass(lineDiv, "CodeMirror-crosshair")
+      off(document, "keyup", up)
+      off(document, "mouseover", up)
+    }
+  }
+  on(document, "keyup", up)
+  on(document, "mouseover", up)
+}
+
+function onKeyUp(e) {
+  if (e.keyCode == 16) { this.doc.sel.shift = false }
+  signalDOMEvent(this, e)
+}
+
+function onKeyPress(e) {
+  var cm = this
+  if (eventInWidget(cm.display, e) || signalDOMEvent(cm, e) || e.ctrlKey && !e.altKey || mac && e.metaKey) { return }
+  var keyCode = e.keyCode, charCode = e.charCode
+  if (presto && keyCode == lastStoppedKey) {lastStoppedKey = null; e_preventDefault(e); return}
+  if ((presto && (!e.which || e.which < 10)) && handleKeyBinding(cm, e)) { return }
+  var ch = String.fromCharCode(charCode == null ? keyCode : charCode)
+  // Some browsers fire keypress events for backspace
+  if (ch == "\x08") { return }
+  if (handleCharBinding(cm, e, ch)) { return }
+  cm.display.input.onKeyPress(e)
+}
+
+var DOUBLECLICK_DELAY = 400
+
+var PastClick = function(time, pos, button) {
+  this.time = time
+  this.pos = pos
+  this.button = button
+};
+
+PastClick.prototype.compare = function (time, pos, button) {
+  return this.time + DOUBLECLICK_DELAY > time &&
+    cmp(pos, this.pos) == 0 && button == this.button
+};
+
+var lastClick;
+var lastDoubleClick;
+function clickRepeat(pos, button) {
+  var now = +new Date
+  if (lastDoubleClick && lastDoubleClick.compare(now, pos, button)) {
+    lastClick = lastDoubleClick = null
+    return "triple"
+  } else if (lastClick && lastClick.compare(now, pos, button)) {
+    lastDoubleClick = new PastClick(now, pos, button)
+    lastClick = null
+    return "double"
+  } else {
+    lastClick = new PastClick(now, pos, button)
+    lastDoubleClick = null
+    return "single"
+  }
+}
+
+// A mouse down can be a single click, double click, triple click,
+// start of selection drag, start of text drag, new cursor
+// (ctrl-click), rectangle drag (alt-drag), or xwin
+// middle-click-paste. Or it might be a click on something we should
+// not interfere with, such as a scrollbar or widget.
+function onMouseDown(e) {
+  var cm = this, display = cm.display
+  if (signalDOMEvent(cm, e) || display.activeTouch && display.input.supportsTouch()) { return }
+  display.input.ensurePolled()
+  display.shift = e.shiftKey
+
+  if (eventInWidget(display, e)) {
+    if (!webkit) {
+      // Briefly turn off draggability, to allow widgets to do
+      // normal dragging things.
+      display.scroller.draggable = false
+      setTimeout(function () { return display.scroller.draggable = true; }, 100)
+    }
+    return
+  }
+  if (clickInGutter(cm, e)) { return }
+  var pos = posFromMouse(cm, e), button = e_button(e), repeat = pos ? clickRepeat(pos, button) : "single"
+  window.focus()
+
+  // #3261: make sure, that we're not starting a second selection
+  if (button == 1 && cm.state.selectingText)
+    { cm.state.selectingText(e) }
+
+  if (pos && handleMappedButton(cm, button, pos, repeat, e)) { return }
+
+  if (button == 1) {
+    if (pos) { leftButtonDown(cm, pos, repeat, e) }
+    else if (e_target(e) == display.scroller) { e_preventDefault(e) }
+  } else if (button == 2) {
+    if (pos) { extendSelection(cm.doc, pos) }
+    setTimeout(function () { return display.input.focus(); }, 20)
+  } else if (button == 3) {
+    if (captureRightClick) { onContextMenu(cm, e) }
+    else { delayBlurEvent(cm) }
+  }
+}
+
+function handleMappedButton(cm, button, pos, repeat, event) {
+  var name = "Click"
+  if (repeat == "double") { name = "Double" + name }
+  else if (repeat == "triple") { name = "Triple" + name }
+  name = (button == 1 ? "Left" : button == 2 ? "Middle" : "Right") + name
+
+  return dispatchKey(cm,  addModifierNames(name, event), event, function (bound) {
+    if (typeof bound == "string") { bound = commands[bound] }
+    if (!bound) { return false }
+    var done = false
+    try {
+      if (cm.isReadOnly()) { cm.state.suppressEdits = true }
+      done = bound(cm, pos) != Pass
+    } finally {
+      cm.state.suppressEdits = false
+    }
+    return done
+  })
+}
+
+function configureMouse(cm, repeat, event) {
+  var option = cm.getOption("configureMouse")
+  var value = option ? option(cm, repeat, event) : {}
+  if (value.unit == null) {
+    var rect = chromeOS ? event.shiftKey && event.metaKey : event.altKey
+    value.unit = rect ? "rectangle" : repeat == "single" ? "char" : repeat == "double" ? "word" : "line"
+  }
+  if (value.extend == null || cm.doc.extend) { value.extend = cm.doc.extend || event.shiftKey }
+  if (value.addNew == null) { value.addNew = mac ? event.metaKey : event.ctrlKey }
+  if (value.moveOnDrag == null) { value.moveOnDrag = !(mac ? event.altKey : event.ctrlKey) }
+  return value
+}
+
+function leftButtonDown(cm, pos, repeat, event) {
+  if (ie) { setTimeout(bind(ensureFocus, cm), 0) }
+  else { cm.curOp.focus = activeElt() }
+
+  var behavior = configureMouse(cm, repeat, event)
+
+  var sel = cm.doc.sel, contained
+  if (cm.options.dragDrop && dragAndDrop && !cm.isReadOnly() &&
+      repeat == "single" && (contained = sel.contains(pos)) > -1 &&
+      (cmp((contained = sel.ranges[contained]).from(), pos) < 0 || pos.xRel > 0) &&
+      (cmp(contained.to(), pos) > 0 || pos.xRel < 0))
+    { leftButtonStartDrag(cm, event, pos, behavior) }
+  else
+    { leftButtonSelect(cm, event, pos, behavior) }
+}
+
+// Start a text drag. When it ends, see if any dragging actually
+// happen, and treat as a click if it didn't.
+function leftButtonStartDrag(cm, event, pos, behavior) {
+  var display = cm.display, moved = false
+  var dragEnd = operation(cm, function (e) {
+    if (webkit) { display.scroller.draggable = false }
+    cm.state.draggingText = false
+    off(document, "mouseup", dragEnd)
+    off(document, "mousemove", mouseMove)
+    off(display.scroller, "dragstart", dragStart)
+    off(display.scroller, "drop", dragEnd)
+    if (!moved) {
+      e_preventDefault(e)
+      if (!behavior.addNew)
+        { extendSelection(cm.doc, pos, null, null, behavior.extend) }
+      // Work around unexplainable focus problem in IE9 (#2127) and Chrome (#3081)
+      if (webkit || ie && ie_version == 9)
+        { setTimeout(function () {document.body.focus(); display.input.focus()}, 20) }
+      else
+        { display.input.focus() }
+    }
+  })
+  var mouseMove = function(e2) {
+    moved = moved || Math.abs(event.clientX - e2.clientX) + Math.abs(event.clientY - e2.clientY) >= 10
+  }
+  var dragStart = function () { return moved = true; }
+  // Let the drag handler handle this.
+  if (webkit) { display.scroller.draggable = true }
+  cm.state.draggingText = dragEnd
+  dragEnd.copy = !behavior.moveOnDrag
+  // IE's approach to draggable
+  if (display.scroller.dragDrop) { display.scroller.dragDrop() }
+  on(document, "mouseup", dragEnd)
+  on(document, "mousemove", mouseMove)
+  on(display.scroller, "dragstart", dragStart)
+  on(display.scroller, "drop", dragEnd)
+
+  delayBlurEvent(cm)
+  setTimeout(function () { return display.input.focus(); }, 20)
+}
+
+function rangeForUnit(cm, pos, unit) {
+  if (unit == "char") { return new Range(pos, pos) }
+  if (unit == "word") { return cm.findWordAt(pos) }
+  if (unit == "line") { return new Range(Pos(pos.line, 0), clipPos(cm.doc, Pos(pos.line + 1, 0))) }
+  var result = unit(cm, pos)
+  return new Range(result.from, result.to)
+}
+
+// Normal selection, as opposed to text dragging.
+function leftButtonSelect(cm, event, start, behavior) {
+  var display = cm.display, doc = cm.doc
+  e_preventDefault(event)
+
+  var ourRange, ourIndex, startSel = doc.sel, ranges = startSel.ranges
+  if (behavior.addNew && !behavior.extend) {
+    ourIndex = doc.sel.contains(start)
+    if (ourIndex > -1)
+      { ourRange = ranges[ourIndex] }
+    else
+      { ourRange = new Range(start, start) }
+  } else {
+    ourRange = doc.sel.primary()
+    ourIndex = doc.sel.primIndex
+  }
+
+  if (behavior.unit == "rectangle") {
+    if (!behavior.addNew) { ourRange = new Range(start, start) }
+    start = posFromMouse(cm, event, true, true)
+    ourIndex = -1
+  } else {
+    var range = rangeForUnit(cm, start, behavior.unit)
+    if (behavior.extend)
+      { ourRange = extendRange(ourRange, range.anchor, range.head, behavior.extend) }
+    else
+      { ourRange = range }
+  }
+
+  if (!behavior.addNew) {
+    ourIndex = 0
+    setSelection(doc, new Selection([ourRange], 0), sel_mouse)
+    startSel = doc.sel
+  } else if (ourIndex == -1) {
+    ourIndex = ranges.length
+    setSelection(doc, normalizeSelection(ranges.concat([ourRange]), ourIndex),
+                 {scroll: false, origin: "*mouse"})
+  } else if (ranges.length > 1 && ranges[ourIndex].empty() && behavior.unit == "char" && !behavior.extend) {
+    setSelection(doc, normalizeSelection(ranges.slice(0, ourIndex).concat(ranges.slice(ourIndex + 1)), 0),
+                 {scroll: false, origin: "*mouse"})
+    startSel = doc.sel
+  } else {
+    replaceOneSelection(doc, ourIndex, ourRange, sel_mouse)
+  }
+
+  var lastPos = start
+  function extendTo(pos) {
+    if (cmp(lastPos, pos) == 0) { return }
+    lastPos = pos
+
+    if (behavior.unit == "rectangle") {
+      var ranges = [], tabSize = cm.options.tabSize
+      var startCol = countColumn(getLine(doc, start.line).text, start.ch, tabSize)
+      var posCol = countColumn(getLine(doc, pos.line).text, pos.ch, tabSize)
+      var left = Math.min(startCol, posCol), right = Math.max(startCol, posCol)
+      for (var line = Math.min(start.line, pos.line), end = Math.min(cm.lastLine(), Math.max(start.line, pos.line));
+           line <= end; line++) {
+        var text = getLine(doc, line).text, leftPos = findColumn(text, left, tabSize)
+        if (left == right)
+          { ranges.push(new Range(Pos(line, leftPos), Pos(line, leftPos))) }
+        else if (text.length > leftPos)
+          { ranges.push(new Range(Pos(line, leftPos), Pos(line, findColumn(text, right, tabSize)))) }
+      }
+      if (!ranges.length) { ranges.push(new Range(start, start)) }
+      setSelection(doc, normalizeSelection(startSel.ranges.slice(0, ourIndex).concat(ranges), ourIndex),
+                   {origin: "*mouse", scroll: false})
+      cm.scrollIntoView(pos)
+    } else {
+      var oldRange = ourRange
+      var range = rangeForUnit(cm, pos, behavior.unit)
+      var anchor = oldRange.anchor, head
+      if (cmp(range.anchor, anchor) > 0) {
+        head = range.head
+        anchor = minPos(oldRange.from(), range.anchor)
+      } else {
+        head = range.anchor
+        anchor = maxPos(oldRange.to(), range.head)
+      }
+      var ranges$1 = startSel.ranges.slice(0)
+      ranges$1[ourIndex] = bidiSimplify(cm, new Range(clipPos(doc, anchor), head))
+      setSelection(doc, normalizeSelection(ranges$1, ourIndex), sel_mouse)
+    }
+  }
+
+  var editorSize = display.wrapper.getBoundingClientRect()
+  // Used to ensure timeout re-tries don't fire when another extend
+  // happened in the meantime (clearTimeout isn't reliable -- at
+  // least on Chrome, the timeouts still happen even when cleared,
+  // if the clear happens after their scheduled firing time).
+  var counter = 0
+
+  function extend(e) {
+    var curCount = ++counter
+    var cur = posFromMouse(cm, e, true, behavior.unit == "rectangle")
+    if (!cur) { return }
+    if (cmp(cur, lastPos) != 0) {
+      cm.curOp.focus = activeElt()
+      extendTo(cur)
+      var visible = visibleLines(display, doc)
+      if (cur.line >= visible.to || cur.line < visible.from)
+        { setTimeout(operation(cm, function () {if (counter == curCount) { extend(e) }}), 150) }
+    } else {
+      var outside = e.clientY < editorSize.top ? -20 : e.clientY > editorSize.bottom ? 20 : 0
+      if (outside) { setTimeout(operation(cm, function () {
+        if (counter != curCount) { return }
+        display.scroller.scrollTop += outside
+        extend(e)
+      }), 50) }
+    }
+  }
+
+  function done(e) {
+    cm.state.selectingText = false
+    counter = Infinity
+    e_preventDefault(e)
+    display.input.focus()
+    off(document, "mousemove", move)
+    off(document, "mouseup", up)
+    doc.history.lastSelOrigin = null
+  }
+
+  var move = operation(cm, function (e) {
+    if (!e_button(e)) { done(e) }
+    else { extend(e) }
+  })
+  var up = operation(cm, done)
+  cm.state.selectingText = up
+  on(document, "mousemove", move)
+  on(document, "mouseup", up)
+}
+
+// Used when mouse-selecting to adjust the anchor to the proper side
+// of a bidi jump depending on the visual position of the head.
+function bidiSimplify(cm, range) {
+  var anchor = range.anchor;
+  var head = range.head;
+  var anchorLine = getLine(cm.doc, anchor.line)
+  if (cmp(anchor, head) == 0 && anchor.sticky == head.sticky) { return range }
+  var order = getOrder(anchorLine)
+  if (!order) { return range }
+  var index = getBidiPartAt(order, anchor.ch, anchor.sticky), part = order[index]
+  if (part.from != anchor.ch && part.to != anchor.ch) { return range }
+  var boundary = index + ((part.from == anchor.ch) == (part.level != 1) ? 0 : 1)
+  if (boundary == 0 || boundary == order.length) { return range }
+
+  // Compute the relative visual position of the head compared to the
+  // anchor (<0 is to the left, >0 to the right)
+  var leftSide
+  if (head.line != anchor.line) {
+    leftSide = (head.line - anchor.line) * (cm.doc.direction == "ltr" ? 1 : -1) > 0
+  } else {
+    var headIndex = getBidiPartAt(order, head.ch, head.sticky)
+    var dir = headIndex - index || (head.ch - anchor.ch) * (part.level == 1 ? -1 : 1)
+    if (headIndex == boundary - 1 || headIndex == boundary)
+      { leftSide = dir < 0 }
+    else
+      { leftSide = dir > 0 }
+  }
+
+  var usePart = order[boundary + (leftSide ? -1 : 0)]
+  var from = leftSide == (usePart.level == 1)
+  var ch = from ? usePart.from : usePart.to, sticky = from ? "after" : "before"
+  return anchor.ch == ch && anchor.sticky == sticky ? range : new Range(new Pos(anchor.line, ch, sticky), head)
+}
+
+
+// Determines whether an event happened in the gutter, and fires the
+// handlers for the corresponding event.
+function gutterEvent(cm, e, type, prevent) {
+  var mX, mY
+  if (e.touches) {
+    mX = e.touches[0].clientX
+    mY = e.touches[0].clientY
+  } else {
+    try { mX = e.clientX; mY = e.clientY }
+    catch(e) { return false }
+  }
+  if (mX >= Math.floor(cm.display.gutters.getBoundingClientRect().right)) { return false }
+  if (prevent) { e_preventDefault(e) }
+
+  var display = cm.display
+  var lineBox = display.lineDiv.getBoundingClientRect()
+
+  if (mY > lineBox.bottom || !hasHandler(cm, type)) { return e_defaultPrevented(e) }
+  mY -= lineBox.top - display.viewOffset
+
+  for (var i = 0; i < cm.options.gutters.length; ++i) {
+    var g = display.gutters.childNodes[i]
+    if (g && g.getBoundingClientRect().right >= mX) {
+      var line = lineAtHeight(cm.doc, mY)
+      var gutter = cm.options.gutters[i]
+      signal(cm, type, cm, line, gutter, e)
+      return e_defaultPrevented(e)
+    }
+  }
+}
+
+function clickInGutter(cm, e) {
+  return gutterEvent(cm, e, "gutterClick", true)
+}
+
+// CONTEXT MENU HANDLING
+
+// To make the context menu work, we need to briefly unhide the
+// textarea (making it as unobtrusive as possible) to let the
+// right-click take effect on it.
+function onContextMenu(cm, e) {
+  if (eventInWidget(cm.display, e) || contextMenuInGutter(cm, e)) { return }
+  if (signalDOMEvent(cm, e, "contextmenu")) { return }
+  cm.display.input.onContextMenu(e)
+}
+
+function contextMenuInGutter(cm, e) {
+  if (!hasHandler(cm, "gutterContextMenu")) { return false }
+  return gutterEvent(cm, e, "gutterContextMenu", false)
+}
+
+function themeChanged(cm) {
+  cm.display.wrapper.className = cm.display.wrapper.className.replace(/\s*cm-s-\S+/g, "") +
+    cm.options.theme.replace(/(^|\s)\s*/g, " cm-s-")
+  clearCaches(cm)
+}
+
+var Init = {toString: function(){return "CodeMirror.Init"}}
+
+var defaults = {}
+var optionHandlers = {}
+
+function defineOptions(CodeMirror) {
+  var optionHandlers = CodeMirror.optionHandlers
+
+  function option(name, deflt, handle, notOnInit) {
+    CodeMirror.defaults[name] = deflt
+    if (handle) { optionHandlers[name] =
+      notOnInit ? function (cm, val, old) {if (old != Init) { handle(cm, val, old) }} : handle }
+  }
+
+  CodeMirror.defineOption = option
+
+  // Passed to option handlers when there is no old value.
+  CodeMirror.Init = Init
+
+  // These two are, on init, called from the constructor because they
+  // have to be initialized before the editor can start at all.
+  option("value", "", function (cm, val) { return cm.setValue(val); }, true)
+  option("mode", null, function (cm, val) {
+    cm.doc.modeOption = val
+    loadMode(cm)
+  }, true)
+
+  option("indentUnit", 2, loadMode, true)
+  option("indentWithTabs", false)
+  option("smartIndent", true)
+  option("tabSize", 4, function (cm) {
+    resetModeState(cm)
+    clearCaches(cm)
+    regChange(cm)
+  }, true)
+  option("lineSeparator", null, function (cm, val) {
+    cm.doc.lineSep = val
+    if (!val) { return }
+    var newBreaks = [], lineNo = cm.doc.first
+    cm.doc.iter(function (line) {
+      for (var pos = 0;;) {
+        var found = line.text.indexOf(val, pos)
+        if (found == -1) { break }
+        pos = found + val.length
+        newBreaks.push(Pos(lineNo, found))
+      }
+      lineNo++
+    })
+    for (var i = newBreaks.length - 1; i >= 0; i--)
+      { replaceRange(cm.doc, val, newBreaks[i], Pos(newBreaks[i].line, newBreaks[i].ch + val.length)) }
+  })
+  option("specialChars", /[\u0000-\u001f\u007f-\u009f\u00ad\u061c\u200b-\u200f\u2028\u2029\ufeff]/g, function (cm, val, old) {
+    cm.state.specialChars = new RegExp(val.source + (val.test("\t") ? "" : "|\t"), "g")
+    if (old != Init) { cm.refresh() }
+  })
+  option("specialCharPlaceholder", defaultSpecialCharPlaceholder, function (cm) { return cm.refresh(); }, true)
+  option("electricChars", true)
+  option("inputStyle", mobile ? "contenteditable" : "textarea", function () {
+    throw new Error("inputStyle can not (yet) be changed in a running editor") // FIXME
+  }, true)
+  option("spellcheck", false, function (cm, val) { return cm.getInputField().spellcheck = val; }, true)
+  option("rtlMoveVisually", !windows)
+  option("wholeLineUpdateBefore", true)
+
+  option("theme", "default", function (cm) {
+    themeChanged(cm)
+    guttersChanged(cm)
+  }, true)
+  option("keyMap", "default", function (cm, val, old) {
+    var next = getKeyMap(val)
+    var prev = old != Init && getKeyMap(old)
+    if (prev && prev.detach) { prev.detach(cm, next) }
+    if (next.attach) { next.attach(cm, prev || null) }
+  })
+  option("extraKeys", null)
+  option("configureMouse", null)
+
+  option("lineWrapping", false, wrappingChanged, true)
+  option("gutters", [], function (cm) {
+    setGuttersForLineNumbers(cm.options)
+    guttersChanged(cm)
+  }, true)
+  option("fixedGutter", true, function (cm, val) {
+    cm.display.gutters.style.left = val ? compensateForHScroll(cm.display) + "px" : "0"
+    cm.refresh()
+  }, true)
+  option("coverGutterNextToScrollbar", false, function (cm) { return updateScrollbars(cm); }, true)
+  option("scrollbarStyle", "native", function (cm) {
+    initScrollbars(cm)
+    updateScrollbars(cm)
+    cm.display.scrollbars.setScrollTop(cm.doc.scrollTop)
+    cm.display.scrollbars.setScrollLeft(cm.doc.scrollLeft)
+  }, true)
+  option("lineNumbers", false, function (cm) {
+    setGuttersForLineNumbers(cm.options)
+    guttersChanged(cm)
+  }, true)
+  option("firstLineNumber", 1, guttersChanged, true)
+  option("lineNumberFormatter", function (integer) { return integer; }, guttersChanged, true)
+  option("showCursorWhenSelecting", false, updateSelection, true)
+
+  option("resetSelectionOnContextMenu", true)
+  option("lineWiseCopyCut", true)
+  option("pasteLinesPerSelection", true)
+
+  option("readOnly", false, function (cm, val) {
+    if (val == "nocursor") {
+      onBlur(cm)
+      cm.display.input.blur()
+    }
+    cm.display.input.readOnlyChanged(val)
+  })
+  option("disableInput", false, function (cm, val) {if (!val) { cm.display.input.reset() }}, true)
+  option("dragDrop", true, dragDropChanged)
+  option("allowDropFileTypes", null)
+
+  option("cursorBlinkRate", 530)
+  option("cursorScrollMargin", 0)
+  option("cursorHeight", 1, updateSelection, true)
+  option("singleCursorHeightPerLine", true, updateSelection, true)
+  option("workTime", 100)
+  option("workDelay", 100)
+  option("flattenSpans", true, resetModeState, true)
+  option("addModeClass", false, resetModeState, true)
+  option("pollInterval", 100)
+  option("undoDepth", 200, function (cm, val) { return cm.doc.history.undoDepth = val; })
+  option("historyEventDelay", 1250)
+  option("viewportMargin", 10, function (cm) { return cm.refresh(); }, true)
+  option("maxHighlightLength", 10000, resetModeState, true)
+  option("moveInputWithCursor", true, function (cm, val) {
+    if (!val) { cm.display.input.resetPosition() }
+  })
+
+  option("tabindex", null, function (cm, val) { return cm.display.input.getField().tabIndex = val || ""; })
+  option("autofocus", null)
+  option("direction", "ltr", function (cm, val) { return cm.doc.setDirection(val); }, true)
+}
+
+function guttersChanged(cm) {
+  updateGutters(cm)
+  regChange(cm)
+  alignHorizontally(cm)
+}
+
+function dragDropChanged(cm, value, old) {
+  var wasOn = old && old != Init
+  if (!value != !wasOn) {
+    var funcs = cm.display.dragFunctions
+    var toggle = value ? on : off
+    toggle(cm.display.scroller, "dragstart", funcs.start)
+    toggle(cm.display.scroller, "dragenter", funcs.enter)
+    toggle(cm.display.scroller, "dragover", funcs.over)
+    toggle(cm.display.scroller, "dragleave", funcs.leave)
+    toggle(cm.display.scroller, "drop", funcs.drop)
+  }
+}
+
+function wrappingChanged(cm) {
+  if (cm.options.lineWrapping) {
+    addClass(cm.display.wrapper, "CodeMirror-wrap")
+    cm.display.sizer.style.minWidth = ""
+    cm.display.sizerWidth = null
+  } else {
+    rmClass(cm.display.wrapper, "CodeMirror-wrap")
+    findMaxLine(cm)
+  }
+  estimateLineHeights(cm)
+  regChange(cm)
+  clearCaches(cm)
+  setTimeout(function () { return updateScrollbars(cm); }, 100)
+}
+
+// A CodeMirror instance represents an editor. This is the object
+// that user code is usually dealing with.
+
+function CodeMirror(place, options) {
+  var this$1 = this;
+
+  if (!(this instanceof CodeMirror)) { return new CodeMirror(place, options) }
+
+  this.options = options = options ? copyObj(options) : {}
+  // Determine effective options based on given values and defaults.
+  copyObj(defaults, options, false)
+  setGuttersForLineNumbers(options)
+
+  var doc = options.value
+  if (typeof doc == "string") { doc = new Doc(doc, options.mode, null, options.lineSeparator, options.direction) }
+  this.doc = doc
+
+  var input = new CodeMirror.inputStyles[options.inputStyle](this)
+  var display = this.display = new Display(place, doc, input)
+  display.wrapper.CodeMirror = this
+  updateGutters(this)
+  themeChanged(this)
+  if (options.lineWrapping)
+    { this.display.wrapper.className += " CodeMirror-wrap" }
+  initScrollbars(this)
+
+  this.state = {
+    keyMaps: [],  // stores maps added by addKeyMap
+    overlays: [], // highlighting overlays, as added by addOverlay
+    modeGen: 0,   // bumped when mode/overlay changes, used to invalidate highlighting info
+    overwrite: false,
+    delayingBlurEvent: false,
+    focused: false,
+    suppressEdits: false, // used to disable editing during key handlers when in readOnly mode
+    pasteIncoming: false, cutIncoming: false, // help recognize paste/cut edits in input.poll
+    selectingText: false,
+    draggingText: false,
+    highlight: new Delayed(), // stores highlight worker timeout
+    keySeq: null,  // Unfinished key sequence
+    specialChars: null
+  }
+
+  if (options.autofocus && !mobile) { display.input.focus() }
+
+  // Override magic textarea content restore that IE sometimes does
+  // on our hidden textarea on reload
+  if (ie && ie_version < 11) { setTimeout(function () { return this$1.display.input.reset(true); }, 20) }
+
+  registerEventHandlers(this)
+  ensureGlobalHandlers()
+
+  startOperation(this)
+  this.curOp.forceUpdate = true
+  attachDoc(this, doc)
+
+  if ((options.autofocus && !mobile) || this.hasFocus())
+    { setTimeout(bind(onFocus, this), 20) }
+  else
+    { onBlur(this) }
+
+  for (var opt in optionHandlers) { if (optionHandlers.hasOwnProperty(opt))
+    { optionHandlers[opt](this$1, options[opt], Init) } }
+  maybeUpdateLineNumberWidth(this)
+  if (options.finishInit) { options.finishInit(this) }
+  for (var i = 0; i < initHooks.length; ++i) { initHooks[i](this$1) }
+  endOperation(this)
+  // Suppress optimizelegibility in Webkit, since it breaks text
+  // measuring on line wrapping boundaries.
+  if (webkit && options.lineWrapping &&
+      getComputedStyle(display.lineDiv).textRendering == "optimizelegibility")
+    { display.lineDiv.style.textRendering = "auto" }
+}
+
+// The default configuration options.
+CodeMirror.defaults = defaults
+// Functions to run when options are changed.
+CodeMirror.optionHandlers = optionHandlers
+
+// Attach the necessary event handlers when initializing the editor
+function registerEventHandlers(cm) {
+  var d = cm.display
+  on(d.scroller, "mousedown", operation(cm, onMouseDown))
+  // Older IE's will not fire a second mousedown for a double click
+  if (ie && ie_version < 11)
+    { on(d.scroller, "dblclick", operation(cm, function (e) {
+      if (signalDOMEvent(cm, e)) { return }
+      var pos = posFromMouse(cm, e)
+      if (!pos || clickInGutter(cm, e) || eventInWidget(cm.display, e)) { return }
+      e_preventDefault(e)
+      var word = cm.findWordAt(pos)
+      extendSelection(cm.doc, word.anchor, word.head)
+    })) }
+  else
+    { on(d.scroller, "dblclick", function (e) { return signalDOMEvent(cm, e) || e_preventDefault(e); }) }
+  // Some browsers fire contextmenu *after* opening the menu, at
+  // which point we can't mess with it anymore. Context menu is
+  // handled in onMouseDown for these browsers.
+  if (!captureRightClick) { on(d.scroller, "contextmenu", function (e) { return onContextMenu(cm, e); }) }
+
+  // Used to suppress mouse event handling when a touch happens
+  var touchFinished, prevTouch = {end: 0}
+  function finishTouch() {
+    if (d.activeTouch) {
+      touchFinished = setTimeout(function () { return d.activeTouch = null; }, 1000)
+      prevTouch = d.activeTouch
+      prevTouch.end = +new Date
+    }
+  }
+  function isMouseLikeTouchEvent(e) {
+    if (e.touches.length != 1) { return false }
+    var touch = e.touches[0]
+    return touch.radiusX <= 1 && touch.radiusY <= 1
+  }
+  function farAway(touch, other) {
+    if (other.left == null) { return true }
+    var dx = other.left - touch.left, dy = other.top - touch.top
+    return dx * dx + dy * dy > 20 * 20
+  }
+  on(d.scroller, "touchstart", function (e) {
+    if (!signalDOMEvent(cm, e) && !isMouseLikeTouchEvent(e) && !clickInGutter(cm, e)) {
+      d.input.ensurePolled()
+      clearTimeout(touchFinished)
+      var now = +new Date
+      d.activeTouch = {start: now, moved: false,
+                       prev: now - prevTouch.end <= 300 ? prevTouch : null}
+      if (e.touches.length == 1) {
+        d.activeTouch.left = e.touches[0].pageX
+        d.activeTouch.top = e.touches[0].pageY
+      }
+    }
+  })
+  on(d.scroller, "touchmove", function () {
+    if (d.activeTouch) { d.activeTouch.moved = true }
+  })
+  on(d.scroller, "touchend", function (e) {
+    var touch = d.activeTouch
+    if (touch && !eventInWidget(d, e) && touch.left != null &&
+        !touch.moved && new Date - touch.start < 300) {
+      var pos = cm.coordsChar(d.activeTouch, "page"), range
+      if (!touch.prev || farAway(touch, touch.prev)) // Single tap
+        { range = new Range(pos, pos) }
+      else if (!touch.prev.prev || farAway(touch, touch.prev.prev)) // Double tap
+        { range = cm.findWordAt(pos) }
+      else // Triple tap
+        { range = new Range(Pos(pos.line, 0), clipPos(cm.doc, Pos(pos.line + 1, 0))) }
+      cm.setSelection(range.anchor, range.head)
+      cm.focus()
+      e_preventDefault(e)
+    }
+    finishTouch()
+  })
+  on(d.scroller, "touchcancel", finishTouch)
+
+  // Sync scrolling between fake scrollbars and real scrollable
+  // area, ensure viewport is updated when scrolling.
+  on(d.scroller, "scroll", function () {
+    if (d.scroller.clientHeight) {
+      updateScrollTop(cm, d.scroller.scrollTop)
+      setScrollLeft(cm, d.scroller.scrollLeft, true)
+      signal(cm, "scroll", cm)
+    }
+  })
+
+  // Listen to wheel events in order to try and update the viewport on time.
+  on(d.scroller, "mousewheel", function (e) { return onScrollWheel(cm, e); })
+  on(d.scroller, "DOMMouseScroll", function (e) { return onScrollWheel(cm, e); })
+
+  // Prevent wrapper from ever scrolling
+  on(d.wrapper, "scroll", function () { return d.wrapper.scrollTop = d.wrapper.scrollLeft = 0; })
+
+  d.dragFunctions = {
+    enter: function (e) {if (!signalDOMEvent(cm, e)) { e_stop(e) }},
+    over: function (e) {if (!signalDOMEvent(cm, e)) { onDragOver(cm, e); e_stop(e) }},
+    start: function (e) { return onDragStart(cm, e); },
+    drop: operation(cm, onDrop),
+    leave: function (e) {if (!signalDOMEvent(cm, e)) { clearDragCursor(cm) }}
+  }
+
+  var inp = d.input.getField()
+  on(inp, "keyup", function (e) { return onKeyUp.call(cm, e); })
+  on(inp, "keydown", operation(cm, onKeyDown))
+  on(inp, "keypress", operation(cm, onKeyPress))
+  on(inp, "focus", function (e) { return onFocus(cm, e); })
+  on(inp, "blur", function (e) { return onBlur(cm, e); })
+}
+
+var initHooks = []
+CodeMirror.defineInitHook = function (f) { return initHooks.push(f); }
+
+// Indent the given line. The how parameter can be "smart",
+// "add"/null, "subtract", or "prev". When aggressive is false
+// (typically set to true for forced single-line indents), empty
+// lines are not indented, and places where the mode returns Pass
+// are left alone.
+function indentLine(cm, n, how, aggressive) {
+  var doc = cm.doc, state
+  if (how == null) { how = "add" }
+  if (how == "smart") {
+    // Fall back to "prev" when the mode doesn't have an indentation
+    // method.
+    if (!doc.mode.indent) { how = "prev" }
+    else { state = getContextBefore(cm, n).state }
+  }
+
+  var tabSize = cm.options.tabSize
+  var line = getLine(doc, n), curSpace = countColumn(line.text, null, tabSize)
+  if (line.stateAfter) { line.stateAfter = null }
+  var curSpaceString = line.text.match(/^\s*/)[0], indentation
+  if (!aggressive && !/\S/.test(line.text)) {
+    indentation = 0
+    how = "not"
+  } else if (how == "smart") {
+    indentation = doc.mode.indent(state, line.text.slice(curSpaceString.length), line.text)
+    if (indentation == Pass || indentation > 150) {
+      if (!aggressive) { return }
+      how = "prev"
+    }
+  }
+  if (how == "prev") {
+    if (n > doc.first) { indentation = countColumn(getLine(doc, n-1).text, null, tabSize) }
+    else { indentation = 0 }
+  } else if (how == "add") {
+    indentation = curSpace + cm.options.indentUnit
+  } else if (how == "subtract") {
+    indentation = curSpace - cm.options.indentUnit
+  } else if (typeof how == "number") {
+    indentation = curSpace + how
+  }
+  indentation = Math.max(0, indentation)
+
+  var indentString = "", pos = 0
+  if (cm.options.indentWithTabs)
+    { for (var i = Math.floor(indentation / tabSize); i; --i) {pos += tabSize; indentString += "\t"} }
+  if (pos < indentation) { indentString += spaceStr(indentation - pos) }
+
+  if (indentString != curSpaceString) {
+    replaceRange(doc, indentString, Pos(n, 0), Pos(n, curSpaceString.length), "+input")
+    line.stateAfter = null
+    return true
+  } else {
+    // Ensure that, if the cursor was in the whitespace at the start
+    // of the line, it is moved to the end of that space.
+    for (var i$1 = 0; i$1 < doc.sel.ranges.length; i$1++) {
+      var range = doc.sel.ranges[i$1]
+      if (range.head.line == n && range.head.ch < curSpaceString.length) {
+        var pos$1 = Pos(n, curSpaceString.length)
+        replaceOneSelection(doc, i$1, new Range(pos$1, pos$1))
+        break
+      }
+    }
+  }
+}
+
+// This will be set to a {lineWise: bool, text: [string]} object, so
+// that, when pasting, we know what kind of selections the copied
+// text was made out of.
+var lastCopied = null
+
+function setLastCopied(newLastCopied) {
+  lastCopied = newLastCopied
+}
+
+function applyTextInput(cm, inserted, deleted, sel, origin) {
+  var doc = cm.doc
+  cm.display.shift = false
+  if (!sel) { sel = doc.sel }
+
+  var paste = cm.state.pasteIncoming || origin == "paste"
+  var textLines = splitLinesAuto(inserted), multiPaste = null
+  // When pasing N lines into N selections, insert one line per selection
+  if (paste && sel.ranges.length > 1) {
+    if (lastCopied && lastCopied.text.join("\n") == inserted) {
+      if (sel.ranges.length % lastCopied.text.length == 0) {
+        multiPaste = []
+        for (var i = 0; i < lastCopied.text.length; i++)
+          { multiPaste.push(doc.splitLines(lastCopied.text[i])) }
+      }
+    } else if (textLines.length == sel.ranges.length && cm.options.pasteLinesPerSelection) {
+      multiPaste = map(textLines, function (l) { return [l]; })
+    }
+  }
+
+  var updateInput
+  // Normal behavior is to insert the new text into every selection
+  for (var i$1 = sel.ranges.length - 1; i$1 >= 0; i$1--) {
+    var range = sel.ranges[i$1]
+    var from = range.from(), to = range.to()
+    if (range.empty()) {
+      if (deleted && deleted > 0) // Handle deletion
+        { from = Pos(from.line, from.ch - deleted) }
+      else if (cm.state.overwrite && !paste) // Handle overwrite
+        { to = Pos(to.line, Math.min(getLine(doc, to.line).text.length, to.ch + lst(textLines).length)) }
+      else if (lastCopied && lastCopied.lineWise && lastCopied.text.join("\n") == inserted)
+        { from = to = Pos(from.line, 0) }
+    }
+    updateInput = cm.curOp.updateInput
+    var changeEvent = {from: from, to: to, text: multiPaste ? multiPaste[i$1 % multiPaste.length] : textLines,
+                       origin: origin || (paste ? "paste" : cm.state.cutIncoming ? "cut" : "+input")}
+    makeChange(cm.doc, changeEvent)
+    signalLater(cm, "inputRead", cm, changeEvent)
+  }
+  if (inserted && !paste)
+    { triggerElectric(cm, inserted) }
+
+  ensureCursorVisible(cm)
+  cm.curOp.updateInput = updateInput
+  cm.curOp.typing = true
+  cm.state.pasteIncoming = cm.state.cutIncoming = false
+}
+
+function handlePaste(e, cm) {
+  var pasted = e.clipboardData && e.clipboardData.getData("Text")
+  if (pasted) {
+    e.preventDefault()
+    if (!cm.isReadOnly() && !cm.options.disableInput)
+      { runInOp(cm, function () { return applyTextInput(cm, pasted, 0, null, "paste"); }) }
+    return true
+  }
+}
+
+function triggerElectric(cm, inserted) {
+  // When an 'electric' character is inserted, immediately trigger a reindent
+  if (!cm.options.electricChars || !cm.options.smartIndent) { return }
+  var sel = cm.doc.sel
+
+  for (var i = sel.ranges.length - 1; i >= 0; i--) {
+    var range = sel.ranges[i]
+    if (range.head.ch > 100 || (i && sel.ranges[i - 1].head.line == range.head.line)) { continue }
+    var mode = cm.getModeAt(range.head)
+    var indented = false
+    if (mode.electricChars) {
+      for (var j = 0; j < mode.electricChars.length; j++)
+        { if (inserted.indexOf(mode.electricChars.charAt(j)) > -1) {
+          indented = indentLine(cm, range.head.line, "smart")
+          break
+        } }
+    } else if (mode.electricInput) {
+      if (mode.electricInput.test(getLine(cm.doc, range.head.line).text.slice(0, range.head.ch)))
+        { indented = indentLine(cm, range.head.line, "smart") }
+    }
+    if (indented) { signalLater(cm, "electricInput", cm, range.head.line) }
+  }
+}
+
+function copyableRanges(cm) {
+  var text = [], ranges = []
+  for (var i = 0; i < cm.doc.sel.ranges.length; i++) {
+    var line = cm.doc.sel.ranges[i].head.line
+    var lineRange = {anchor: Pos(line, 0), head: Pos(line + 1, 0)}
+    ranges.push(lineRange)
+    text.push(cm.getRange(lineRange.anchor, lineRange.head))
+  }
+  return {text: text, ranges: ranges}
+}
+
+function disableBrowserMagic(field, spellcheck) {
+  field.setAttribute("autocorrect", "off")
+  field.setAttribute("autocapitalize", "off")
+  field.setAttribute("spellcheck", !!spellcheck)
+}
+
+function hiddenTextarea() {
+  var te = elt("textarea", null, null, "position: absolute; bottom: -1em; padding: 0; width: 1px; height: 1em; outline: none")
+  var div = elt("div", [te], null, "overflow: hidden; position: relative; width: 3px; height: 0px;")
+  // The textarea is kept positioned near the cursor to prevent the
+  // fact that it'll be scrolled into view on input from scrolling
+  // our fake cursor out of view. On webkit, when wrap=off, paste is
+  // very slow. So make the area wide instead.
+  if (webkit) { te.style.width = "1000px" }
+  else { te.setAttribute("wrap", "off") }
+  // If border: 0; -- iOS fails to open keyboard (issue #1287)
+  if (ios) { te.style.border = "1px solid black" }
+  disableBrowserMagic(te)
+  return div
+}
+
+// The publicly visible API. Note that methodOp(f) means
+// 'wrap f in an operation, performed on its `this` parameter'.
+
+// This is not the complete set of editor methods. Most of the
+// methods defined on the Doc type are also injected into
+// CodeMirror.prototype, for backwards compatibility and
+// convenience.
+
+function addEditorMethods(CodeMirror) {
+  var optionHandlers = CodeMirror.optionHandlers
+
+  var helpers = CodeMirror.helpers = {}
+
+  CodeMirror.prototype = {
+    constructor: CodeMirror,
+    focus: function(){window.focus(); this.display.input.focus()},
+
+    setOption: function(option, value) {
+      var options = this.options, old = options[option]
+      if (options[option] == value && option != "mode") { return }
+      options[option] = value
+      if (optionHandlers.hasOwnProperty(option))
+        { operation(this, optionHandlers[option])(this, value, old) }
+      signal(this, "optionChange", this, option)
+    },
+
+    getOption: function(option) {return this.options[option]},
+    getDoc: function() {return this.doc},
+
+    addKeyMap: function(map, bottom) {
+      this.state.keyMaps[bottom ? "push" : "unshift"](getKeyMap(map))
+    },
+    removeKeyMap: function(map) {
+      var maps = this.state.keyMaps
+      for (var i = 0; i < maps.length; ++i)
+        { if (maps[i] == map || maps[i].name == map) {
+          maps.splice(i, 1)
+          return true
+        } }
+    },
+
+    addOverlay: methodOp(function(spec, options) {
+      var mode = spec.token ? spec : CodeMirror.getMode(this.options, spec)
+      if (mode.startState) { throw new Error("Overlays may not be stateful.") }
+      insertSorted(this.state.overlays,
+                   {mode: mode, modeSpec: spec, opaque: options && options.opaque,
+                    priority: (options && options.priority) || 0},
+                   function (overlay) { return overlay.priority; })
+      this.state.modeGen++
+      regChange(this)
+    }),
+    removeOverlay: methodOp(function(spec) {
+      var this$1 = this;
+
+      var overlays = this.state.overlays
+      for (var i = 0; i < overlays.length; ++i) {
+        var cur = overlays[i].modeSpec
+        if (cur == spec || typeof spec == "string" && cur.name == spec) {
+          overlays.splice(i, 1)
+          this$1.state.modeGen++
+          regChange(this$1)
+          return
+        }
+      }
+    }),
+
+    indentLine: methodOp(function(n, dir, aggressive) {
+      if (typeof dir != "string" && typeof dir != "number") {
+        if (dir == null) { dir = this.options.smartIndent ? "smart" : "prev" }
+        else { dir = dir ? "add" : "subtract" }
+      }
+      if (isLine(this.doc, n)) { indentLine(this, n, dir, aggressive) }
+    }),
+    indentSelection: methodOp(function(how) {
+      var this$1 = this;
+
+      var ranges = this.doc.sel.ranges, end = -1
+      for (var i = 0; i < ranges.length; i++) {
+        var range = ranges[i]
+        if (!range.empty()) {
+          var from = range.from(), to = range.to()
+          var start = Math.max(end, from.line)
+          end = Math.min(this$1.lastLine(), to.line - (to.ch ? 0 : 1)) + 1
+          for (var j = start; j < end; ++j)
+            { indentLine(this$1, j, how) }
+          var newRanges = this$1.doc.sel.ranges
+          if (from.ch == 0 && ranges.length == newRanges.length && newRanges[i].from().ch > 0)
+            { replaceOneSelection(this$1.doc, i, new Range(from, newRanges[i].to()), sel_dontScroll) }
+        } else if (range.head.line > end) {
+          indentLine(this$1, range.head.line, how, true)
+          end = range.head.line
+          if (i == this$1.doc.sel.primIndex) { ensureCursorVisible(this$1) }
+        }
+      }
+    }),
+
+    // Fetch the parser token for a given character. Useful for hacks
+    // that want to inspect the mode state (say, for completion).
+    getTokenAt: function(pos, precise) {
+      return takeToken(this, pos, precise)
+    },
+
+    getLineTokens: function(line, precise) {
+      return takeToken(this, Pos(line), precise, true)
+    },
+
+    getTokenTypeAt: function(pos) {
+      pos = clipPos(this.doc, pos)
+      var styles = getLineStyles(this, getLine(this.doc, pos.line))
+      var before = 0, after = (styles.length - 1) / 2, ch = pos.ch
+      var type
+      if (ch == 0) { type = styles[2] }
+      else { for (;;) {
+        var mid = (before + after) >> 1
+        if ((mid ? styles[mid * 2 - 1] : 0) >= ch) { after = mid }
+        else if (styles[mid * 2 + 1] < ch) { before = mid + 1 }
+        else { type = styles[mid * 2 + 2]; break }
+      } }
+      var cut = type ? type.indexOf("overlay ") : -1
+      return cut < 0 ? type : cut == 0 ? null : type.slice(0, cut - 1)
+    },
+
+    getModeAt: function(pos) {
+      var mode = this.doc.mode
+      if (!mode.innerMode) { return mode }
+      return CodeMirror.innerMode(mode, this.getTokenAt(pos).state).mode
+    },
+
+    getHelper: function(pos, type) {
+      return this.getHelpers(pos, type)[0]
+    },
+
+    getHelpers: function(pos, type) {
+      var this$1 = this;
+
+      var found = []
+      if (!helpers.hasOwnProperty(type)) { return found }
+      var help = helpers[type], mode = this.getModeAt(pos)
+      if (typeof mode[type] == "string") {
+        if (help[mode[type]]) { found.push(help[mode[type]]) }
+      } else if (mode[type]) {
+        for (var i = 0; i < mode[type].length; i++) {
+          var val = help[mode[type][i]]
+          if (val) { found.push(val) }
+        }
+      } else if (mode.helperType && help[mode.helperType]) {
+        found.push(help[mode.helperType])
+      } else if (help[mode.name]) {
+        found.push(help[mode.name])
+      }
+      for (var i$1 = 0; i$1 < help._global.length; i$1++) {
+        var cur = help._global[i$1]
+        if (cur.pred(mode, this$1) && indexOf(found, cur.val) == -1)
+          { found.push(cur.val) }
+      }
+      return found
+    },
+
+    getStateAfter: function(line, precise) {
+      var doc = this.doc
+      line = clipLine(doc, line == null ? doc.first + doc.size - 1: line)
+      return getContextBefore(this, line + 1, precise).state
+    },
+
+    cursorCoords: function(start, mode) {
+      var pos, range = this.doc.sel.primary()
+      if (start == null) { pos = range.head }
+      else if (typeof start == "object") { pos = clipPos(this.doc, start) }
+      else { pos = start ? range.from() : range.to() }
+      return cursorCoords(this, pos, mode || "page")
+    },
+
+    charCoords: function(pos, mode) {
+      return charCoords(this, clipPos(this.doc, pos), mode || "page")
+    },
+
+    coordsChar: function(coords, mode) {
+      coords = fromCoordSystem(this, coords, mode || "page")
+      return coordsChar(this, coords.left, coords.top)
+    },
+
+    lineAtHeight: function(height, mode) {
+      height = fromCoordSystem(this, {top: height, left: 0}, mode || "page").top
+      return lineAtHeight(this.doc, height + this.display.viewOffset)
+    },
+    heightAtLine: function(line, mode, includeWidgets) {
+      var end = false, lineObj
+      if (typeof line == "number") {
+        var last = this.doc.first + this.doc.size - 1
+        if (line < this.doc.first) { line = this.doc.first }
+        else if (line > last) { line = last; end = true }
+        lineObj = getLine(this.doc, line)
+      } else {
+        lineObj = line
+      }
+      return intoCoordSystem(this, lineObj, {top: 0, left: 0}, mode || "page", includeWidgets || end).top +
+        (end ? this.doc.height - heightAtLine(lineObj) : 0)
+    },
+
+    defaultTextHeight: function() { return textHeight(this.display) },
+    defaultCharWidth: function() { return charWidth(this.display) },
+
+    getViewport: function() { return {from: this.display.viewFrom, to: this.display.viewTo}},
+
+    addWidget: function(pos, node, scroll, vert, horiz) {
+      var display = this.display
+      pos = cursorCoords(this, clipPos(this.doc, pos))
+      var top = pos.bottom, left = pos.left
+      node.style.position = "absolute"
+      node.setAttribute("cm-ignore-events", "true")
+      this.display.input.setUneditable(node)
+      display.sizer.appendChild(node)
+      if (vert == "over") {
+        top = pos.top
+      } else if (vert == "above" || vert == "near") {
+        var vspace = Math.max(display.wrapper.clientHeight, this.doc.height),
+        hspace = Math.max(display.sizer.clientWidth, display.lineSpace.clientWidth)
+        // Default to positioning above (if specified and possible); otherwise default to positioning below
+        if ((vert == 'above' || pos.bottom + node.offsetHeight > vspace) && pos.top > node.offsetHeight)
+          { top = pos.top - node.offsetHeight }
+        else if (pos.bottom + node.offsetHeight <= vspace)
+          { top = pos.bottom }
+        if (left + node.offsetWidth > hspace)
+          { left = hspace - node.offsetWidth }
+      }
+      node.style.top = top + "px"
+      node.style.left = node.style.right = ""
+      if (horiz == "right") {
+        left = display.sizer.clientWidth - node.offsetWidth
+        node.style.right = "0px"
+      } else {
+        if (horiz == "left") { left = 0 }
+        else if (horiz == "middle") { left = (display.sizer.clientWidth - node.offsetWidth) / 2 }
+        node.style.left = left + "px"
+      }
+      if (scroll)
+        { scrollIntoView(this, {left: left, top: top, right: left + node.offsetWidth, bottom: top + node.offsetHeight}) }
+    },
+
+    triggerOnKeyDown: methodOp(onKeyDown),
+    triggerOnKeyPress: methodOp(onKeyPress),
+    triggerOnKeyUp: onKeyUp,
+    triggerOnMouseDown: methodOp(onMouseDown),
+
+    execCommand: function(cmd) {
+      if (commands.hasOwnProperty(cmd))
+        { return commands[cmd].call(null, this) }
+    },
+
+    triggerElectric: methodOp(function(text) { triggerElectric(this, text) }),
+
+    findPosH: function(from, amount, unit, visually) {
+      var this$1 = this;
+
+      var dir = 1
+      if (amount < 0) { dir = -1; amount = -amount }
+      var cur = clipPos(this.doc, from)
+      for (var i = 0; i < amount; ++i) {
+        cur = findPosH(this$1.doc, cur, dir, unit, visually)
+        if (cur.hitSide) { break }
+      }
+      return cur
+    },
+
+    moveH: methodOp(function(dir, unit) {
+      var this$1 = this;
+
+      this.extendSelectionsBy(function (range) {
+        if (this$1.display.shift || this$1.doc.extend || range.empty())
+          { return findPosH(this$1.doc, range.head, dir, unit, this$1.options.rtlMoveVisually) }
+        else
+          { return dir < 0 ? range.from() : range.to() }
+      }, sel_move)
+    }),
+
+    deleteH: methodOp(function(dir, unit) {
+      var sel = this.doc.sel, doc = this.doc
+      if (sel.somethingSelected())
+        { doc.replaceSelection("", null, "+delete") }
+      else
+        { deleteNearSelection(this, function (range) {
+          var other = findPosH(doc, range.head, dir, unit, false)
+          return dir < 0 ? {from: other, to: range.head} : {from: range.head, to: other}
+        }) }
+    }),
+
+    findPosV: function(from, amount, unit, goalColumn) {
+      var this$1 = this;
+
+      var dir = 1, x = goalColumn
+      if (amount < 0) { dir = -1; amount = -amount }
+      var cur = clipPos(this.doc, from)
+      for (var i = 0; i < amount; ++i) {
+        var coords = cursorCoords(this$1, cur, "div")
+        if (x == null) { x = coords.left }
+        else { coords.left = x }
+        cur = findPosV(this$1, coords, dir, unit)
+        if (cur.hitSide) { break }
+      }
+      return cur
+    },
+
+    moveV: methodOp(function(dir, unit) {
+      var this$1 = this;
+
+      var doc = this.doc, goals = []
+      var collapse = !this.display.shift && !doc.extend && doc.sel.somethingSelected()
+      doc.extendSelectionsBy(function (range) {
+        if (collapse)
+          { return dir < 0 ? range.from() : range.to() }
+        var headPos = cursorCoords(this$1, range.head, "div")
+        if (range.goalColumn != null) { headPos.left = range.goalColumn }
+        goals.push(headPos.left)
+        var pos = findPosV(this$1, headPos, dir, unit)
+        if (unit == "page" && range == doc.sel.primary())
+          { addToScrollTop(this$1, charCoords(this$1, pos, "div").top - headPos.top) }
+        return pos
+      }, sel_move)
+      if (goals.length) { for (var i = 0; i < doc.sel.ranges.length; i++)
+        { doc.sel.ranges[i].goalColumn = goals[i] } }
+    }),
+
+    // Find the word at the given position (as returned by coordsChar).
+    findWordAt: function(pos) {
+      var doc = this.doc, line = getLine(doc, pos.line).text
+      var start = pos.ch, end = pos.ch
+      if (line) {
+        var helper = this.getHelper(pos, "wordChars")
+        if ((pos.sticky == "before" || end == line.length) && start) { --start; } else { ++end }
+        var startChar = line.charAt(start)
+        var check = isWordChar(startChar, helper)
+          ? function (ch) { return isWordChar(ch, helper); }
+          : /\s/.test(startChar) ? function (ch) { return /\s/.test(ch); }
+          : function (ch) { return (!/\s/.test(ch) && !isWordChar(ch)); }
+        while (start > 0 && check(line.charAt(start - 1))) { --start }
+        while (end < line.length && check(line.charAt(end))) { ++end }
+      }
+      return new Range(Pos(pos.line, start), Pos(pos.line, end))
+    },
+
+    toggleOverwrite: function(value) {
+      if (value != null && value == this.state.overwrite) { return }
+      if (this.state.overwrite = !this.state.overwrite)
+        { addClass(this.display.cursorDiv, "CodeMirror-overwrite") }
+      else
+        { rmClass(this.display.cursorDiv, "CodeMirror-overwrite") }
+
+      signal(this, "overwriteToggle", this, this.state.overwrite)
+    },
+    hasFocus: function() { return this.display.input.getField() == activeElt() },
+    isReadOnly: function() { return !!(this.options.readOnly || this.doc.cantEdit) },
+
+    scrollTo: methodOp(function (x, y) { scrollToCoords(this, x, y) }),
+    getScrollInfo: function() {
+      var scroller = this.display.scroller
+      return {left: scroller.scrollLeft, top: scroller.scrollTop,
+              height: scroller.scrollHeight - scrollGap(this) - this.display.barHeight,
+              width: scroller.scrollWidth - scrollGap(this) - this.display.barWidth,
+              clientHeight: displayHeight(this), clientWidth: displayWidth(this)}
+    },
+
+    scrollIntoView: methodOp(function(range, margin) {
+      if (range == null) {
+        range = {from: this.doc.sel.primary().head, to: null}
+        if (margin == null) { margin = this.options.cursorScrollMargin }
+      } else if (typeof range == "number") {
+        range = {from: Pos(range, 0), to: null}
+      } else if (range.from == null) {
+        range = {from: range, to: null}
+      }
+      if (!range.to) { range.to = range.from }
+      range.margin = margin || 0
+
+      if (range.from.line != null) {
+        scrollToRange(this, range)
+      } else {
+        scrollToCoordsRange(this, range.from, range.to, range.margin)
+      }
+    }),
+
+    setSize: methodOp(function(width, height) {
+      var this$1 = this;
+
+      var interpret = function (val) { return typeof val == "number" || /^\d+$/.test(String(val)) ? val + "px" : val; }
+      if (width != null) { this.display.wrapper.style.width = interpret(width) }
+      if (height != null) { this.display.wrapper.style.height = interpret(height) }
+      if (this.options.lineWrapping) { clearLineMeasurementCache(this) }
+      var lineNo = this.display.viewFrom
+      this.doc.iter(lineNo, this.display.viewTo, function (line) {
+        if (line.widgets) { for (var i = 0; i < line.widgets.length; i++)
+          { if (line.widgets[i].noHScroll) { regLineChange(this$1, lineNo, "widget"); break } } }
+        ++lineNo
+      })
+      this.curOp.forceUpdate = true
+      signal(this, "refresh", this)
+    }),
+
+    operation: function(f){return runInOp(this, f)},
+    startOperation: function(){return startOperation(this)},
+    endOperation: function(){return endOperation(this)},
+
+    refresh: methodOp(function() {
+      var oldHeight = this.display.cachedTextHeight
+      regChange(this)
+      this.curOp.forceUpdate = true
+      clearCaches(this)
+      scrollToCoords(this, this.doc.scrollLeft, this.doc.scrollTop)
+      updateGutterSpace(this)
+      if (oldHeight == null || Math.abs(oldHeight - textHeight(this.display)) > .5)
+        { estimateLineHeights(this) }
+      signal(this, "refresh", this)
+    }),
+
+    swapDoc: methodOp(function(doc) {
+      var old = this.doc
+      old.cm = null
+      attachDoc(this, doc)
+      clearCaches(this)
+      this.display.input.reset()
+      scrollToCoords(this, doc.scrollLeft, doc.scrollTop)
+      this.curOp.forceScroll = true
+      signalLater(this, "swapDoc", this, old)
+      return old
+    }),
+
+    getInputField: function(){return this.display.input.getField()},
+    getWrapperElement: function(){return this.display.wrapper},
+    getScrollerElement: function(){return this.display.scroller},
+    getGutterElement: function(){return this.display.gutters}
+  }
+  eventMixin(CodeMirror)
+
+  CodeMirror.registerHelper = function(type, name, value) {
+    if (!helpers.hasOwnProperty(type)) { helpers[type] = CodeMirror[type] = {_global: []} }
+    helpers[type][name] = value
+  }
+  CodeMirror.registerGlobalHelper = function(type, name, predicate, value) {
+    CodeMirror.registerHelper(type, name, value)
+    helpers[type]._global.push({pred: predicate, val: value})
+  }
+}
+
+// Used for horizontal relative motion. Dir is -1 or 1 (left or
+// right), unit can be "char", "column" (like char, but doesn't
+// cross line boundaries), "word" (across next word), or "group" (to
+// the start of next group of word or non-word-non-whitespace
+// chars). The visually param controls whether, in right-to-left
+// text, direction 1 means to move towards the next index in the
+// string, or towards the character to the right of the current
+// position. The resulting position will have a hitSide=true
+// property if it reached the end of the document.
+function findPosH(doc, pos, dir, unit, visually) {
+  var oldPos = pos
+  var origDir = dir
+  var lineObj = getLine(doc, pos.line)
+  function findNextLine() {
+    var l = pos.line + dir
+    if (l < doc.first || l >= doc.first + doc.size) { return false }
+    pos = new Pos(l, pos.ch, pos.sticky)
+    return lineObj = getLine(doc, l)
+  }
+  function moveOnce(boundToLine) {
+    var next
+    if (visually) {
+      next = moveVisually(doc.cm, lineObj, pos, dir)
+    } else {
+      next = moveLogically(lineObj, pos, dir)
+    }
+    if (next == null) {
+      if (!boundToLine && findNextLine())
+        { pos = endOfLine(visually, doc.cm, lineObj, pos.line, dir) }
+      else
+        { return false }
+    } else {
+      pos = next
+    }
+    return true
+  }
+
+  if (unit == "char") {
+    moveOnce()
+  } else if (unit == "column") {
+    moveOnce(true)
+  } else if (unit == "word" || unit == "group") {
+    var sawType = null, group = unit == "group"
+    var helper = doc.cm && doc.cm.getHelper(pos, "wordChars")
+    for (var first = true;; first = false) {
+      if (dir < 0 && !moveOnce(!first)) { break }
+      var cur = lineObj.text.charAt(pos.ch) || "\n"
+      var type = isWordChar(cur, helper) ? "w"
+        : group && cur == "\n" ? "n"
+        : !group || /\s/.test(cur) ? null
+        : "p"
+      if (group && !first && !type) { type = "s" }
+      if (sawType && sawType != type) {
+        if (dir < 0) {dir = 1; moveOnce(); pos.sticky = "after"}
+        break
+      }
+
+      if (type) { sawType = type }
+      if (dir > 0 && !moveOnce(!first)) { break }
+    }
+  }
+  var result = skipAtomic(doc, pos, oldPos, origDir, true)
+  if (equalCursorPos(oldPos, result)) { result.hitSide = true }
+  return result
+}
+
+// For relative vertical movement. Dir may be -1 or 1. Unit can be
+// "page" or "line". The resulting position will have a hitSide=true
+// property if it reached the end of the document.
+function findPosV(cm, pos, dir, unit) {
+  var doc = cm.doc, x = pos.left, y
+  if (unit == "page") {
+    var pageSize = Math.min(cm.display.wrapper.clientHeight, window.innerHeight || document.documentElement.clientHeight)
+    var moveAmount = Math.max(pageSize - .5 * textHeight(cm.display), 3)
+    y = (dir > 0 ? pos.bottom : pos.top) + dir * moveAmount
+
+  } else if (unit == "line") {
+    y = dir > 0 ? pos.bottom + 3 : pos.top - 3
+  }
+  var target
+  for (;;) {
+    target = coordsChar(cm, x, y)
+    if (!target.outside) { break }
+    if (dir < 0 ? y <= 0 : y >= doc.height) { target.hitSide = true; break }
+    y += dir * 5
+  }
+  return target
+}
+
+// CONTENTEDITABLE INPUT STYLE
+
+var ContentEditableInput = function(cm) {
+  this.cm = cm
+  this.lastAnchorNode = this.lastAnchorOffset = this.lastFocusNode = this.lastFocusOffset = null
+  this.polling = new Delayed()
+  this.composing = null
+  this.gracePeriod = false
+  this.readDOMTimeout = null
+};
+
+ContentEditableInput.prototype.init = function (display) {
+    var this$1 = this;
+
+  var input = this, cm = input.cm
+  var div = input.div = display.lineDiv
+  disableBrowserMagic(div, cm.options.spellcheck)
+
+  on(div, "paste", function (e) {
+    if (signalDOMEvent(cm, e) || handlePaste(e, cm)) { return }
+    // IE doesn't fire input events, so we schedule a read for the pasted content in this way
+    if (ie_version <= 11) { setTimeout(operation(cm, function () { return this$1.updateFromDOM(); }), 20) }
+  })
+
+  on(div, "compositionstart", function (e) {
+    this$1.composing = {data: e.data, done: false}
+  })
+  on(div, "compositionupdate", function (e) {
+    if (!this$1.composing) { this$1.composing = {data: e.data, done: false} }
+  })
+  on(div, "compositionend", function (e) {
+    if (this$1.composing) {
+      if (e.data != this$1.composing.data) { this$1.readFromDOMSoon() }
+      this$1.composing.done = true
+    }
+  })
+
+  on(div, "touchstart", function () { return input.forceCompositionEnd(); })
+
+  on(div, "input", function () {
+    if (!this$1.composing) { this$1.readFromDOMSoon() }
+  })
+
+  function onCopyCut(e) {
+    if (signalDOMEvent(cm, e)) { return }
+    if (cm.somethingSelected()) {
+      setLastCopied({lineWise: false, text: cm.getSelections()})
+      if (e.type == "cut") { cm.replaceSelection("", null, "cut") }
+    } else if (!cm.options.lineWiseCopyCut) {
+      return
+    } else {
+      var ranges = copyableRanges(cm)
+      setLastCopied({lineWise: true, text: ranges.text})
+      if (e.type == "cut") {
+        cm.operation(function () {
+          cm.setSelections(ranges.ranges, 0, sel_dontScroll)
+          cm.replaceSelection("", null, "cut")
+        })
+      }
+    }
+    if (e.clipboardData) {
+      e.clipboardData.clearData()
+      var content = lastCopied.text.join("\n")
+      // iOS exposes the clipboard API, but seems to discard content inserted into it
+      e.clipboardData.setData("Text", content)
+      if (e.clipboardData.getData("Text") == content) {
+        e.preventDefault()
+        return
+      }
+    }
+    // Old-fashioned briefly-focus-a-textarea hack
+    var kludge = hiddenTextarea(), te = kludge.firstChild
+    cm.display.lineSpace.insertBefore(kludge, cm.display.lineSpace.firstChild)
+    te.value = lastCopied.text.join("\n")
+    var hadFocus = document.activeElement
+    selectInput(te)
+    setTimeout(function () {
+      cm.display.lineSpace.removeChild(kludge)
+      hadFocus.focus()
+      if (hadFocus == div) { input.showPrimarySelection() }
+    }, 50)
+  }
+  on(div, "copy", onCopyCut)
+  on(div, "cut", onCopyCut)
+};
+
+ContentEditableInput.prototype.prepareSelection = function () {
+  var result = prepareSelection(this.cm, false)
+  result.focus = this.cm.state.focused
+  return result
+};
+
+ContentEditableInput.prototype.showSelection = function (info, takeFocus) {
+  if (!info || !this.cm.display.view.length) { return }
+  if (info.focus || takeFocus) { this.showPrimarySelection() }
+  this.showMultipleSelections(info)
+};
+
+ContentEditableInput.prototype.showPrimarySelection = function () {
+  var sel = window.getSelection(), cm = this.cm, prim = cm.doc.sel.primary()
+  var from = prim.from(), to = prim.to()
+
+  if (cm.display.viewTo == cm.display.viewFrom || from.line >= cm.display.viewTo || to.line < cm.display.viewFrom) {
+    sel.removeAllRanges()
+    return
+  }
+
+  var curAnchor = domToPos(cm, sel.anchorNode, sel.anchorOffset)
+  var curFocus = domToPos(cm, sel.focusNode, sel.focusOffset)
+  if (curAnchor && !curAnchor.bad && curFocus && !curFocus.bad &&
+      cmp(minPos(curAnchor, curFocus), from) == 0 &&
+      cmp(maxPos(curAnchor, curFocus), to) == 0)
+    { return }
+
+  var view = cm.display.view
+  var start = (from.line >= cm.display.viewFrom && posToDOM(cm, from)) ||
+      {node: view[0].measure.map[2], offset: 0}
+  var end = to.line < cm.display.viewTo && posToDOM(cm, to)
+  if (!end) {
+    var measure = view[view.length - 1].measure
+    var map = measure.maps ? measure.maps[measure.maps.length - 1] : measure.map
+    end = {node: map[map.length - 1], offset: map[map.length - 2] - map[map.length - 3]}
+  }
+
+  if (!start || !end) {
+    sel.removeAllRanges()
+    return
+  }
+
+  var old = sel.rangeCount && sel.getRangeAt(0), rng
+  try { rng = range(start.node, start.offset, end.offset, end.node) }
+  catch(e) {} // Our model of the DOM might be outdated, in which case the range we try to set can be impossible
+  if (rng) {
+    if (!gecko && cm.state.focused) {
+      sel.collapse(start.node, start.offset)
+      if (!rng.collapsed) {
+        sel.removeAllRanges()
+        sel.addRange(rng)
+      }
+    } else {
+      sel.removeAllRanges()
+      sel.addRange(rng)
+    }
+    if (old && sel.anchorNode == null) { sel.addRange(old) }
+    else if (gecko) { this.startGracePeriod() }
+  }
+  this.rememberSelection()
+};
+
+ContentEditableInput.prototype.startGracePeriod = function () {
+    var this$1 = this;
+
+  clearTimeout(this.gracePeriod)
+  this.gracePeriod = setTimeout(function () {
+    this$1.gracePeriod = false
+    if (this$1.selectionChanged())
+      { this$1.cm.operation(function () { return this$1.cm.curOp.selectionChanged = true; }) }
+  }, 20)
+};
+
+ContentEditableInput.prototype.showMultipleSelections = function (info) {
+  removeChildrenAndAdd(this.cm.display.cursorDiv, info.cursors)
+  removeChildrenAndAdd(this.cm.display.selectionDiv, info.selection)
+};
+
+ContentEditableInput.prototype.rememberSelection = function () {
+  var sel = window.getSelection()
+  this.lastAnchorNode = sel.anchorNode; this.lastAnchorOffset = sel.anchorOffset
+  this.lastFocusNode = sel.focusNode; this.lastFocusOffset = sel.focusOffset
+};
+
+ContentEditableInput.prototype.selectionInEditor = function () {
+  var sel = window.getSelection()
+  if (!sel.rangeCount) { return false }
+  var node = sel.getRangeAt(0).commonAncestorContainer
+  return contains(this.div, node)
+};
+
+ContentEditableInput.prototype.focus = function () {
+  if (this.cm.options.readOnly != "nocursor") {
+    if (!this.selectionInEditor())
+      { this.showSelection(this.prepareSelection(), true) }
+    this.div.focus()
+  }
+};
+ContentEditableInput.prototype.blur = function () { this.div.blur() };
+ContentEditableInput.prototype.getField = function () { return this.div };
+
+ContentEditableInput.prototype.supportsTouch = function () { return true };
+
+ContentEditableInput.prototype.receivedFocus = function () {
+  var input = this
+  if (this.selectionInEditor())
+    { this.pollSelection() }
+  else
+    { runInOp(this.cm, function () { return input.cm.curOp.selectionChanged = true; }) }
+
+  function poll() {
+    if (input.cm.state.focused) {
+      input.pollSelection()
+      input.polling.set(input.cm.options.pollInterval, poll)
+    }
+  }
+  this.polling.set(this.cm.options.pollInterval, poll)
+};
+
+ContentEditableInput.prototype.selectionChanged = function () {
+  var sel = window.getSelection()
+  return sel.anchorNode != this.lastAnchorNode || sel.anchorOffset != this.lastAnchorOffset ||
+    sel.focusNode != this.lastFocusNode || sel.focusOffset != this.lastFocusOffset
+};
+
+ContentEditableInput.prototype.pollSelection = function () {
+  if (this.readDOMTimeout != null || this.gracePeriod || !this.selectionChanged()) { return }
+  var sel = window.getSelection(), cm = this.cm
+  // On Android Chrome (version 56, at least), backspacing into an
+  // uneditable block element will put the cursor in that element,
+  // and then, because it's not editable, hide the virtual keyboard.
+  // Because Android doesn't allow us to actually detect backspace
+  // presses in a sane way, this code checks for when that happens
+  // and simulates a backspace press in this case.
+  if (android && chrome && this.cm.options.gutters.length && isInGutter(sel.anchorNode)) {
+    this.cm.triggerOnKeyDown({type: "keydown", keyCode: 8, preventDefault: Math.abs})
+    this.blur()
+    this.focus()
+    return
+  }
+  if (this.composing) { return }
+  this.rememberSelection()
+  var anchor = domToPos(cm, sel.anchorNode, sel.anchorOffset)
+  var head = domToPos(cm, sel.focusNode, sel.focusOffset)
+  if (anchor && head) { runInOp(cm, function () {
+    setSelection(cm.doc, simpleSelection(anchor, head), sel_dontScroll)
+    if (anchor.bad || head.bad) { cm.curOp.selectionChanged = true }
+  }) }
+};
+
+ContentEditableInput.prototype.pollContent = function () {
+  if (this.readDOMTimeout != null) {
+    clearTimeout(this.readDOMTimeout)
+    this.readDOMTimeout = null
+  }
+
+  var cm = this.cm, display = cm.display, sel = cm.doc.sel.primary()
+  var from = sel.from(), to = sel.to()
+  if (from.ch == 0 && from.line > cm.firstLine())
+    { from = Pos(from.line - 1, getLine(cm.doc, from.line - 1).length) }
+  if (to.ch == getLine(cm.doc, to.line).text.length && to.line < cm.lastLine())
+    { to = Pos(to.line + 1, 0) }
+  if (from.line < display.viewFrom || to.line > display.viewTo - 1) { return false }
+
+  var fromIndex, fromLine, fromNode
+  if (from.line == display.viewFrom || (fromIndex = findViewIndex(cm, from.line)) == 0) {
+    fromLine = lineNo(display.view[0].line)
+    fromNode = display.view[0].node
+  } else {
+    fromLine = lineNo(display.view[fromIndex].line)
+    fromNode = display.view[fromIndex - 1].node.nextSibling
+  }
+  var toIndex = findViewIndex(cm, to.line)
+  var toLine, toNode
+  if (toIndex == display.view.length - 1) {
+    toLine = display.viewTo - 1
+    toNode = display.lineDiv.lastChild
+  } else {
+    toLine = lineNo(display.view[toIndex + 1].line) - 1
+    toNode = display.view[toIndex + 1].node.previousSibling
+  }
+
+  if (!fromNode) { return false }
+  var newText = cm.doc.splitLines(domTextBetween(cm, fromNode, toNode, fromLine, toLine))
+  var oldText = getBetween(cm.doc, Pos(fromLine, 0), Pos(toLine, getLine(cm.doc, toLine).text.length))
+  while (newText.length > 1 && oldText.length > 1) {
+    if (lst(newText) == lst(oldText)) { newText.pop(); oldText.pop(); toLine-- }
+    else if (newText[0] == oldText[0]) { newText.shift(); oldText.shift(); fromLine++ }
+    else { break }
+  }
+
+  var cutFront = 0, cutEnd = 0
+  var newTop = newText[0], oldTop = oldText[0], maxCutFront = Math.min(newTop.length, oldTop.length)
+  while (cutFront < maxCutFront && newTop.charCodeAt(cutFront) == oldTop.charCodeAt(cutFront))
+    { ++cutFront }
+  var newBot = lst(newText), oldBot = lst(oldText)
+  var maxCutEnd = Math.min(newBot.length - (newText.length == 1 ? cutFront : 0),
+                           oldBot.length - (oldText.length == 1 ? cutFront : 0))
+  while (cutEnd < maxCutEnd &&
+         newBot.charCodeAt(newBot.length - cutEnd - 1) == oldBot.charCodeAt(oldBot.length - cutEnd - 1))
+    { ++cutEnd }
+  // Try to move start of change to start of selection if ambiguous
+  if (newText.length == 1 && oldText.length == 1 && fromLine == from.line) {
+    while (cutFront && cutFront > from.ch &&
+           newBot.charCodeAt(newBot.length - cutEnd - 1) == oldBot.charCodeAt(oldBot.length - cutEnd - 1)) {
+      cutFront--
+      cutEnd++
+    }
+  }
+
+  newText[newText.length - 1] = newBot.slice(0, newBot.length - cutEnd).replace(/^\u200b+/, "")
+  newText[0] = newText[0].slice(cutFront).replace(/\u200b+$/, "")
+
+  var chFrom = Pos(fromLine, cutFront)
+  var chTo = Pos(toLine, oldText.length ? lst(oldText).length - cutEnd : 0)
+  if (newText.length > 1 || newText[0] || cmp(chFrom, chTo)) {
+    replaceRange(cm.doc, newText, chFrom, chTo, "+input")
+    return true
+  }
+};
+
+ContentEditableInput.prototype.ensurePolled = function () {
+  this.forceCompositionEnd()
+};
+ContentEditableInput.prototype.reset = function () {
+  this.forceCompositionEnd()
+};
+ContentEditableInput.prototype.forceCompositionEnd = function () {
+  if (!this.composing) { return }
+  clearTimeout(this.readDOMTimeout)
+  this.composing = null
+  this.updateFromDOM()
+  this.div.blur()
+  this.div.focus()
+};
+ContentEditableInput.prototype.readFromDOMSoon = function () {
+    var this$1 = this;
+
+  if (this.readDOMTimeout != null) { return }
+  this.readDOMTimeout = setTimeout(function () {
+    this$1.readDOMTimeout = null
+    if (this$1.composing) {
+      if (this$1.composing.done) { this$1.composing = null }
+      else { return }
+    }
+    this$1.updateFromDOM()
+  }, 80)
+};
+
+ContentEditableInput.prototype.updateFromDOM = function () {
+    var this$1 = this;
+
+  if (this.cm.isReadOnly() || !this.pollContent())
+    { runInOp(this.cm, function () { return regChange(this$1.cm); }) }
+};
+
+ContentEditableInput.prototype.setUneditable = function (node) {
+  node.contentEditable = "false"
+};
+
+ContentEditableInput.prototype.onKeyPress = function (e) {
+  if (e.charCode == 0) { return }
+  e.preventDefault()
+  if (!this.cm.isReadOnly())
+    { operation(this.cm, applyTextInput)(this.cm, String.fromCharCode(e.charCode == null ? e.keyCode : e.charCode), 0) }
+};
+
+ContentEditableInput.prototype.readOnlyChanged = function (val) {
+  this.div.contentEditable = String(val != "nocursor")
+};
+
+ContentEditableInput.prototype.onContextMenu = function () {};
+ContentEditableInput.prototype.resetPosition = function () {};
+
+ContentEditableInput.prototype.needsContentAttribute = true
+
+function posToDOM(cm, pos) {
+  var view = findViewForLine(cm, pos.line)
+  if (!view || view.hidden) { return null }
+  var line = getLine(cm.doc, pos.line)
+  var info = mapFromLineView(view, line, pos.line)
+
+  var order = getOrder(line, cm.doc.direction), side = "left"
+  if (order) {
+    var partPos = getBidiPartAt(order, pos.ch)
+    side = partPos % 2 ? "right" : "left"
+  }
+  var result = nodeAndOffsetInLineMap(info.map, pos.ch, side)
+  result.offset = result.collapse == "right" ? result.end : result.start
+  return result
+}
+
+function isInGutter(node) {
+  for (var scan = node; scan; scan = scan.parentNode)
+    { if (/CodeMirror-gutter-wrapper/.test(scan.className)) { return true } }
+  return false
+}
+
+function badPos(pos, bad) { if (bad) { pos.bad = true; } return pos }
+
+function domTextBetween(cm, from, to, fromLine, toLine) {
+  var text = "", closing = false, lineSep = cm.doc.lineSeparator()
+  function recognizeMarker(id) { return function (marker) { return marker.id == id; } }
+  function close() {
+    if (closing) {
+      text += lineSep
+      closing = false
+    }
+  }
+  function addText(str) {
+    if (str) {
+      close()
+      text += str
+    }
+  }
+  function walk(node) {
+    if (node.nodeType == 1) {
+      var cmText = node.getAttribute("cm-text")
+      if (cmText != null) {
+        addText(cmText || node.textContent.replace(/\u200b/g, ""))
+        return
+      }
+      var markerID = node.getAttribute("cm-marker"), range
+      if (markerID) {
+        var found = cm.findMarks(Pos(fromLine, 0), Pos(toLine + 1, 0), recognizeMarker(+markerID))
+        if (found.length && (range = found[0].find(0)))
+          { addText(getBetween(cm.doc, range.from, range.to).join(lineSep)) }
+        return
+      }
+      if (node.getAttribute("contenteditable") == "false") { return }
+      var isBlock = /^(pre|div|p)$/i.test(node.nodeName)
+      if (isBlock) { close() }
+      for (var i = 0; i < node.childNodes.length; i++)
+        { walk(node.childNodes[i]) }
+      if (isBlock) { closing = true }
+    } else if (node.nodeType == 3) {
+      addText(node.nodeValue)
+    }
+  }
+  for (;;) {
+    walk(from)
+    if (from == to) { break }
+    from = from.nextSibling
+  }
+  return text
+}
+
+function domToPos(cm, node, offset) {
+  var lineNode
+  if (node == cm.display.lineDiv) {
+    lineNode = cm.display.lineDiv.childNodes[offset]
+    if (!lineNode) { return badPos(cm.clipPos(Pos(cm.display.viewTo - 1)), true) }
+    node = null; offset = 0
+  } else {
+    for (lineNode = node;; lineNode = lineNode.parentNode) {
+      if (!lineNode || lineNode == cm.display.lineDiv) { return null }
+      if (lineNode.parentNode && lineNode.parentNode == cm.display.lineDiv) { break }
+    }
+  }
+  for (var i = 0; i < cm.display.view.length; i++) {
+    var lineView = cm.display.view[i]
+    if (lineView.node == lineNode)
+      { return locateNodeInLineView(lineView, node, offset) }
+  }
+}
+
+function locateNodeInLineView(lineView, node, offset) {
+  var wrapper = lineView.text.firstChild, bad = false
+  if (!node || !contains(wrapper, node)) { return badPos(Pos(lineNo(lineView.line), 0), true) }
+  if (node == wrapper) {
+    bad = true
+    node = wrapper.childNodes[offset]
+    offset = 0
+    if (!node) {
+      var line = lineView.rest ? lst(lineView.rest) : lineView.line
+      return badPos(Pos(lineNo(line), line.text.length), bad)
+    }
+  }
+
+  var textNode = node.nodeType == 3 ? node : null, topNode = node
+  if (!textNode && node.childNodes.length == 1 && node.firstChild.nodeType == 3) {
+    textNode = node.firstChild
+    if (offset) { offset = textNode.nodeValue.length }
+  }
+  while (topNode.parentNode != wrapper) { topNode = topNode.parentNode }
+  var measure = lineView.measure, maps = measure.maps
+
+  function find(textNode, topNode, offset) {
+    for (var i = -1; i < (maps ? maps.length : 0); i++) {
+      var map = i < 0 ? measure.map : maps[i]
+      for (var j = 0; j < map.length; j += 3) {
+        var curNode = map[j + 2]
+        if (curNode == textNode || curNode == topNode) {
+          var line = lineNo(i < 0 ? lineView.line : lineView.rest[i])
+          var ch = map[j] + offset
+          if (offset < 0 || curNode != textNode) { ch = map[j + (offset ? 1 : 0)] }
+          return Pos(line, ch)
+        }
+      }
+    }
+  }
+  var found = find(textNode, topNode, offset)
+  if (found) { return badPos(found, bad) }
+
+  // FIXME this is all really shaky. might handle the few cases it needs to handle, but likely to cause problems
+  for (var after = topNode.nextSibling, dist = textNode ? textNode.nodeValue.length - offset : 0; after; after = after.nextSibling) {
+    found = find(after, after.firstChild, 0)
+    if (found)
+      { return badPos(Pos(found.line, found.ch - dist), bad) }
+    else
+      { dist += after.textContent.length }
+  }
+  for (var before = topNode.previousSibling, dist$1 = offset; before; before = before.previousSibling) {
+    found = find(before, before.firstChild, -1)
+    if (found)
+      { return badPos(Pos(found.line, found.ch + dist$1), bad) }
+    else
+      { dist$1 += before.textContent.length }
+  }
+}
+
+// TEXTAREA INPUT STYLE
+
+var TextareaInput = function(cm) {
+  this.cm = cm
+  // See input.poll and input.reset
+  this.prevInput = ""
+
+  // Flag that indicates whether we expect input to appear real soon
+  // now (after some event like 'keypress' or 'input') and are
+  // polling intensively.
+  this.pollingFast = false
+  // Self-resetting timeout for the poller
+  this.polling = new Delayed()
+  // Used to work around IE issue with selection being forgotten when focus moves away from textarea
+  this.hasSelection = false
+  this.composing = null
+};
+
+TextareaInput.prototype.init = function (display) {
+    var this$1 = this;
+
+  var input = this, cm = this.cm
+
+  // Wraps and hides input textarea
+  var div = this.wrapper = hiddenTextarea()
+  // The semihidden textarea that is focused when the editor is
+  // focused, and receives input.
+  var te = this.textarea = div.firstChild
+  display.wrapper.insertBefore(div, display.wrapper.firstChild)
+
+  // Needed to hide big blue blinking cursor on Mobile Safari (doesn't seem to work in iOS 8 anymore)
+  if (ios) { te.style.width = "0px" }
+
+  on(te, "input", function () {
+    if (ie && ie_version >= 9 && this$1.hasSelection) { this$1.hasSelection = null }
+    input.poll()
+  })
+
+  on(te, "paste", function (e) {
+    if (signalDOMEvent(cm, e) || handlePaste(e, cm)) { return }
+
+    cm.state.pasteIncoming = true
+    input.fastPoll()
+  })
+
+  function prepareCopyCut(e) {
+    if (signalDOMEvent(cm, e)) { return }
+    if (cm.somethingSelected()) {
+      setLastCopied({lineWise: false, text: cm.getSelections()})
+    } else if (!cm.options.lineWiseCopyCut) {
+      return
+    } else {
+      var ranges = copyableRanges(cm)
+      setLastCopied({lineWise: true, text: ranges.text})
+      if (e.type == "cut") {
+        cm.setSelections(ranges.ranges, null, sel_dontScroll)
+      } else {
+        input.prevInput = ""
+        te.value = ranges.text.join("\n")
+        selectInput(te)
+      }
+    }
+    if (e.type == "cut") { cm.state.cutIncoming = true }
+  }
+  on(te, "cut", prepareCopyCut)
+  on(te, "copy", prepareCopyCut)
+
+  on(display.scroller, "paste", function (e) {
+    if (eventInWidget(display, e) || signalDOMEvent(cm, e)) { return }
+    cm.state.pasteIncoming = true
+    input.focus()
+  })
+
+  // Prevent normal selection in the editor (we handle our own)
+  on(display.lineSpace, "selectstart", function (e) {
+    if (!eventInWidget(display, e)) { e_preventDefault(e) }
+  })
+
+  on(te, "compositionstart", function () {
+    var start = cm.getCursor("from")
+    if (input.composing) { input.composing.range.clear() }
+    input.composing = {
+      start: start,
+      range: cm.markText(start, cm.getCursor("to"), {className: "CodeMirror-composing"})
+    }
+  })
+  on(te, "compositionend", function () {
+    if (input.composing) {
+      input.poll()
+      input.composing.range.clear()
+      input.composing = null
+    }
+  })
+};
+
+TextareaInput.prototype.prepareSelection = function () {
+  // Redraw the selection and/or cursor
+  var cm = this.cm, display = cm.display, doc = cm.doc
+  var result = prepareSelection(cm)
+
+  // Move the hidden textarea near the cursor to prevent scrolling artifacts
+  if (cm.options.moveInputWithCursor) {
+    var headPos = cursorCoords(cm, doc.sel.primary().head, "div")
+    var wrapOff = display.wrapper.getBoundingClientRect(), lineOff = display.lineDiv.getBoundingClientRect()
+    result.teTop = Math.max(0, Math.min(display.wrapper.clientHeight - 10,
+                                        headPos.top + lineOff.top - wrapOff.top))
+    result.teLeft = Math.max(0, Math.min(display.wrapper.clientWidth - 10,
+                                         headPos.left + lineOff.left - wrapOff.left))
+  }
+
+  return result
+};
+
+TextareaInput.prototype.showSelection = function (drawn) {
+  var cm = this.cm, display = cm.display
+  removeChildrenAndAdd(display.cursorDiv, drawn.cursors)
+  removeChildrenAndAdd(display.selectionDiv, drawn.selection)
+  if (drawn.teTop != null) {
+    this.wrapper.style.top = drawn.teTop + "px"
+    this.wrapper.style.left = drawn.teLeft + "px"
+  }
+};
+
+// Reset the input to correspond to the selection (or to be empty,
+// when not typing and nothing is selected)
+TextareaInput.prototype.reset = function (typing) {
+  if (this.contextMenuPending || this.composing) { return }
+  var cm = this.cm
+  if (cm.somethingSelected()) {
+    this.prevInput = ""
+    var content = cm.getSelection()
+    this.textarea.value = content
+    if (cm.state.focused) { selectInput(this.textarea) }
+    if (ie && ie_version >= 9) { this.hasSelection = content }
+  } else if (!typing) {
+    this.prevInput = this.textarea.value = ""
+    if (ie && ie_version >= 9) { this.hasSelection = null }
+  }
+};
+
+TextareaInput.prototype.getField = function () { return this.textarea };
+
+TextareaInput.prototype.supportsTouch = function () { return false };
+
+TextareaInput.prototype.focus = function () {
+  if (this.cm.options.readOnly != "nocursor" && (!mobile || activeElt() != this.textarea)) {
+    try { this.textarea.focus() }
+    catch (e) {} // IE8 will throw if the textarea is display: none or not in DOM
+  }
+};
+
+TextareaInput.prototype.blur = function () { this.textarea.blur() };
+
+TextareaInput.prototype.resetPosition = function () {
+  this.wrapper.style.top = this.wrapper.style.left = 0
+};
+
+TextareaInput.prototype.receivedFocus = function () { this.slowPoll() };
+
+// Poll for input changes, using the normal rate of polling. This
+// runs as long as the editor is focused.
+TextareaInput.prototype.slowPoll = function () {
+    var this$1 = this;
+
+  if (this.pollingFast) { return }
+  this.polling.set(this.cm.options.pollInterval, function () {
+    this$1.poll()
+    if (this$1.cm.state.focused) { this$1.slowPoll() }
+  })
+};
+
+// When an event has just come in that is likely to add or change
+// something in the input textarea, we poll faster, to ensure that
+// the change appears on the screen quickly.
+TextareaInput.prototype.fastPoll = function () {
+  var missed = false, input = this
+  input.pollingFast = true
+  function p() {
+    var changed = input.poll()
+    if (!changed && !missed) {missed = true; input.polling.set(60, p)}
+    else {input.pollingFast = false; input.slowPoll()}
+  }
+  input.polling.set(20, p)
+};
+
+// Read input from the textarea, and update the document to match.
+// When something is selected, it is present in the textarea, and
+// selected (unless it is huge, in which case a placeholder is
+// used). When nothing is selected, the cursor sits after previously
+// seen text (can be empty), which is stored in prevInput (we must
+// not reset the textarea when typing, because that breaks IME).
+TextareaInput.prototype.poll = function () {
+    var this$1 = this;
+
+  var cm = this.cm, input = this.textarea, prevInput = this.prevInput
+  // Since this is called a *lot*, try to bail out as cheaply as
+  // possible when it is clear that nothing happened. hasSelection
+  // will be the case when there is a lot of text in the textarea,
+  // in which case reading its value would be expensive.
+  if (this.contextMenuPending || !cm.state.focused ||
+      (hasSelection(input) && !prevInput && !this.composing) ||
+      cm.isReadOnly() || cm.options.disableInput || cm.state.keySeq)
+    { return false }
+
+  var text = input.value
+  // If nothing changed, bail.
+  if (text == prevInput && !cm.somethingSelected()) { return false }
+  // Work around nonsensical selection resetting in IE9/10, and
+  // inexplicable appearance of private area unicode characters on
+  // some key combos in Mac (#2689).
+  if (ie && ie_version >= 9 && this.hasSelection === text ||
+      mac && /[\uf700-\uf7ff]/.test(text)) {
+    cm.display.input.reset()
+    return false
+  }
+
+  if (cm.doc.sel == cm.display.selForContextMenu) {
+    var first = text.charCodeAt(0)
+    if (first == 0x200b && !prevInput) { prevInput = "\u200b" }
+    if (first == 0x21da) { this.reset(); return this.cm.execCommand("undo") }
+  }
+  // Find the part of the input that is actually new
+  var same = 0, l = Math.min(prevInput.length, text.length)
+  while (same < l && prevInput.charCodeAt(same) == text.charCodeAt(same)) { ++same }
+
+  runInOp(cm, function () {
+    applyTextInput(cm, text.slice(same), prevInput.length - same,
+                   null, this$1.composing ? "*compose" : null)
+
+    // Don't leave long text in the textarea, since it makes further polling slow
+    if (text.length > 1000 || text.indexOf("\n") > -1) { input.value = this$1.prevInput = "" }
+    else { this$1.prevInput = text }
+
+    if (this$1.composing) {
+      this$1.composing.range.clear()
+      this$1.composing.range = cm.markText(this$1.composing.start, cm.getCursor("to"),
+                                         {className: "CodeMirror-composing"})
+    }
+  })
+  return true
+};
+
+TextareaInput.prototype.ensurePolled = function () {
+  if (this.pollingFast && this.poll()) { this.pollingFast = false }
+};
+
+TextareaInput.prototype.onKeyPress = function () {
+  if (ie && ie_version >= 9) { this.hasSelection = null }
+  this.fastPoll()
+};
+
+TextareaInput.prototype.onContextMenu = function (e) {
+  var input = this, cm = input.cm, display = cm.display, te = input.textarea
+  var pos = posFromMouse(cm, e), scrollPos = display.scroller.scrollTop
+  if (!pos || presto) { return } // Opera is difficult.
+
+  // Reset the current text selection only if the click is done outside of the selection
+  // and 'resetSelectionOnContextMenu' option is true.
+  var reset = cm.options.resetSelectionOnContextMenu
+  if (reset && cm.doc.sel.contains(pos) == -1)
+    { operation(cm, setSelection)(cm.doc, simpleSelection(pos), sel_dontScroll) }
+
+  var oldCSS = te.style.cssText, oldWrapperCSS = input.wrapper.style.cssText
+  input.wrapper.style.cssText = "position: absolute"
+  var wrapperBox = input.wrapper.getBoundingClientRect()
+  te.style.cssText = "position: absolute; width: 30px; height: 30px;\n      top: " + (e.clientY - wrapperBox.top - 5) + "px; left: " + (e.clientX - wrapperBox.left - 5) + "px;\n      z-index: 1000; background: " + (ie ? "rgba(255, 255, 255, .05)" : "transparent") + ";\n      outline: none; border-width: 0; outline: none; overflow: hidden; opacity: .05; filter: alpha(opacity=5);"
+  var oldScrollY
+  if (webkit) { oldScrollY = window.scrollY } // Work around Chrome issue (#2712)
+  display.input.focus()
+  if (webkit) { window.scrollTo(null, oldScrollY) }
+  display.input.reset()
+  // Adds "Select all" to context menu in FF
+  if (!cm.somethingSelected()) { te.value = input.prevInput = " " }
+  input.contextMenuPending = true
+  display.selForContextMenu = cm.doc.sel
+  clearTimeout(display.detectingSelectAll)
+
+  // Select-all will be greyed out if there's nothing to select, so
+  // this adds a zero-width space so that we can later check whether
+  // it got selected.
+  function prepareSelectAllHack() {
+    if (te.selectionStart != null) {
+      var selected = cm.somethingSelected()
+      var extval = "\u200b" + (selected ? te.value : "")
+      te.value = "\u21da" // Used to catch context-menu undo
+      te.value = extval
+      input.prevInput = selected ? "" : "\u200b"
+      te.selectionStart = 1; te.selectionEnd = extval.length
+      // Re-set this, in case some other handler touched the
+      // selection in the meantime.
+      display.selForContextMenu = cm.doc.sel
+    }
+  }
+  function rehide() {
+    input.contextMenuPending = false
+    input.wrapper.style.cssText = oldWrapperCSS
+    te.style.cssText = oldCSS
+    if (ie && ie_version < 9) { display.scrollbars.setScrollTop(display.scroller.scrollTop = scrollPos) }
+
+    // Try to detect the user choosing select-all
+    if (te.selectionStart != null) {
+      if (!ie || (ie && ie_version < 9)) { prepareSelectAllHack() }
+      var i = 0, poll = function () {
+        if (display.selForContextMenu == cm.doc.sel && te.selectionStart == 0 &&
+            te.selectionEnd > 0 && input.prevInput == "\u200b") {
+          operation(cm, selectAll)(cm)
+        } else if (i++ < 10) {
+          display.detectingSelectAll = setTimeout(poll, 500)
+        } else {
+          display.selForContextMenu = null
+          display.input.reset()
+        }
+      }
+      display.detectingSelectAll = setTimeout(poll, 200)
+    }
+  }
+
+  if (ie && ie_version >= 9) { prepareSelectAllHack() }
+  if (captureRightClick) {
+    e_stop(e)
+    var mouseup = function () {
+      off(window, "mouseup", mouseup)
+      setTimeout(rehide, 20)
+    }
+    on(window, "mouseup", mouseup)
+  } else {
+    setTimeout(rehide, 50)
+  }
+};
+
+TextareaInput.prototype.readOnlyChanged = function (val) {
+  if (!val) { this.reset() }
+  this.textarea.disabled = val == "nocursor"
+};
+
+TextareaInput.prototype.setUneditable = function () {};
+
+TextareaInput.prototype.needsContentAttribute = false
+
+function fromTextArea(textarea, options) {
+  options = options ? copyObj(options) : {}
+  options.value = textarea.value
+  if (!options.tabindex && textarea.tabIndex)
+    { options.tabindex = textarea.tabIndex }
+  if (!options.placeholder && textarea.placeholder)
+    { options.placeholder = textarea.placeholder }
+  // Set autofocus to true if this textarea is focused, or if it has
+  // autofocus and no other element is focused.
+  if (options.autofocus == null) {
+    var hasFocus = activeElt()
+    options.autofocus = hasFocus == textarea ||
+      textarea.getAttribute("autofocus") != null && hasFocus == document.body
+  }
+
+  function save() {textarea.value = cm.getValue()}
+
+  var realSubmit
+  if (textarea.form) {
+    on(textarea.form, "submit", save)
+    // Deplorable hack to make the submit method do the right thing.
+    if (!options.leaveSubmitMethodAlone) {
+      var form = textarea.form
+      realSubmit = form.submit
+      try {
+        var wrappedSubmit = form.submit = function () {
+          save()
+          form.submit = realSubmit
+          form.submit()
+          form.submit = wrappedSubmit
+        }
+      } catch(e) {}
+    }
+  }
+
+  options.finishInit = function (cm) {
+    cm.save = save
+    cm.getTextArea = function () { return textarea; }
+    cm.toTextArea = function () {
+      cm.toTextArea = isNaN // Prevent this from being ran twice
+      save()
+      textarea.parentNode.removeChild(cm.getWrapperElement())
+      textarea.style.display = ""
+      if (textarea.form) {
+        off(textarea.form, "submit", save)
+        if (typeof textarea.form.submit == "function")
+          { textarea.form.submit = realSubmit }
+      }
+    }
+  }
+
+  textarea.style.display = "none"
+  var cm = CodeMirror(function (node) { return textarea.parentNode.insertBefore(node, textarea.nextSibling); },
+    options)
+  return cm
+}
+
+function addLegacyProps(CodeMirror) {
+  CodeMirror.off = off
+  CodeMirror.on = on
+  CodeMirror.wheelEventPixels = wheelEventPixels
+  CodeMirror.Doc = Doc
+  CodeMirror.splitLines = splitLinesAuto
+  CodeMirror.countColumn = countColumn
+  CodeMirror.findColumn = findColumn
+  CodeMirror.isWordChar = isWordCharBasic
+  CodeMirror.Pass = Pass
+  CodeMirror.signal = signal
+  CodeMirror.Line = Line
+  CodeMirror.changeEnd = changeEnd
+  CodeMirror.scrollbarModel = scrollbarModel
+  CodeMirror.Pos = Pos
+  CodeMirror.cmpPos = cmp
+  CodeMirror.modes = modes
+  CodeMirror.mimeModes = mimeModes
+  CodeMirror.resolveMode = resolveMode
+  CodeMirror.getMode = getMode
+  CodeMirror.modeExtensions = modeExtensions
+  CodeMirror.extendMode = extendMode
+  CodeMirror.copyState = copyState
+  CodeMirror.startState = startState
+  CodeMirror.innerMode = innerMode
+  CodeMirror.commands = commands
+  CodeMirror.keyMap = keyMap
+  CodeMirror.keyName = keyName
+  CodeMirror.isModifierKey = isModifierKey
+  CodeMirror.lookupKey = lookupKey
+  CodeMirror.normalizeKeyMap = normalizeKeyMap
+  CodeMirror.StringStream = StringStream
+  CodeMirror.SharedTextMarker = SharedTextMarker
+  CodeMirror.TextMarker = TextMarker
+  CodeMirror.LineWidget = LineWidget
+  CodeMirror.e_preventDefault = e_preventDefault
+  CodeMirror.e_stopPropagation = e_stopPropagation
+  CodeMirror.e_stop = e_stop
+  CodeMirror.addClass = addClass
+  CodeMirror.contains = contains
+  CodeMirror.rmClass = rmClass
+  CodeMirror.keyNames = keyNames
+}
+
+// EDITOR CONSTRUCTOR
+
+defineOptions(CodeMirror)
+
+addEditorMethods(CodeMirror)
+
+// Set up methods on CodeMirror's prototype to redirect to the editor's document.
+var dontDelegate = "iter insert remove copy getEditor constructor".split(" ")
+for (var prop in Doc.prototype) { if (Doc.prototype.hasOwnProperty(prop) && indexOf(dontDelegate, prop) < 0)
+  { CodeMirror.prototype[prop] = (function(method) {
+    return function() {return method.apply(this.doc, arguments)}
+  })(Doc.prototype[prop]) } }
+
+eventMixin(Doc)
+
+// INPUT HANDLING
+
+CodeMirror.inputStyles = {"textarea": TextareaInput, "contenteditable": ContentEditableInput}
+
+// MODE DEFINITION AND QUERYING
+
+// Extra arguments are stored as the mode's dependencies, which is
+// used by (legacy) mechanisms like loadmode.js to automatically
+// load a mode. (Preferred mechanism is the require/define calls.)
+CodeMirror.defineMode = function(name/*, mode, …*/) {
+  if (!CodeMirror.defaults.mode && name != "null") { CodeMirror.defaults.mode = name }
+  defineMode.apply(this, arguments)
+}
+
+CodeMirror.defineMIME = defineMIME
+
+// Minimal default mode.
+CodeMirror.defineMode("null", function () { return ({token: function (stream) { return stream.skipToEnd(); }}); })
+CodeMirror.defineMIME("text/plain", "null")
+
+// EXTENSIONS
+
+CodeMirror.defineExtension = function (name, func) {
+  CodeMirror.prototype[name] = func
+}
+CodeMirror.defineDocExtension = function (name, func) {
+  Doc.prototype[name] = func
+}
+
+CodeMirror.fromTextArea = fromTextArea
+
+addLegacyProps(CodeMirror)
+
+CodeMirror.version = "5.30.0"
+
+return CodeMirror;
+
+})));
\ No newline at end of file
diff --git a/public/js/vendor/codemirror/mode/yaml.js b/public/js/vendor/codemirror/mode/yaml.js
new file mode 100644
index 0000000..59c0ecd
--- /dev/null
+++ b/public/js/vendor/codemirror/mode/yaml.js
@@ -0,0 +1,118 @@
+// CodeMirror, copyright (c) by Marijn Haverbeke and others
+// Distributed under an MIT license: http://codemirror.net/LICENSE
+
+(function(mod) {
+  if (typeof exports == "object" && typeof module == "object") // CommonJS
+    mod(require("../../lib/codemirror"));
+  else if (typeof define == "function" && define.amd) // AMD
+    define(["../../lib/codemirror"], mod);
+  else // Plain browser env
+    mod(CodeMirror);
+})(function(CodeMirror) {
+"use strict";
+
+CodeMirror.defineMode("yaml", function() {
+
+  var cons = ['true', 'false', 'on', 'off', 'yes', 'no'];
+  var keywordRegex = new RegExp("\\b(("+cons.join(")|(")+"))$", 'i');
+
+  return {
+    token: function(stream, state) {
+      var ch = stream.peek();
+      var esc = state.escaped;
+      state.escaped = false;
+      /* comments */
+      if (ch == "#" && (stream.pos == 0 || /\s/.test(stream.string.charAt(stream.pos - 1)))) {
+        stream.skipToEnd();
+        return "comment";
+      }
+
+      if (stream.match(/^('([^']|\\.)*'?|"([^"]|\\.)*"?)/))
+        return "string";
+
+      if (state.literal && stream.indentation() > state.keyCol) {
+        stream.skipToEnd(); return "string";
+      } else if (state.literal) { state.literal = false; }
+      if (stream.sol()) {
+        state.keyCol = 0;
+        state.pair = false;
+        state.pairStart = false;
+        /* document start */
+        if(stream.match(/---/)) { return "def"; }
+        /* document end */
+        if (stream.match(/\.\.\./)) { return "def"; }
+        /* array list item */
+        if (stream.match(/\s*-\s+/)) { return 'meta'; }
+      }
+      /* inline pairs/lists */
+      if (stream.match(/^(\{|\}|\[|\])/)) {
+        if (ch == '{')
+          state.inlinePairs++;
+        else if (ch == '}')
+          state.inlinePairs--;
+        else if (ch == '[')
+          state.inlineList++;
+        else
+          state.inlineList--;
+        return 'meta';
+      }
+
+      /* list seperator */
+      if (state.inlineList > 0 && !esc && ch == ',') {
+        stream.next();
+        return 'meta';
+      }
+      /* pairs seperator */
+      if (state.inlinePairs > 0 && !esc && ch == ',') {
+        state.keyCol = 0;
+        state.pair = false;
+        state.pairStart = false;
+        stream.next();
+        return 'meta';
+      }
+
+      /* start of value of a pair */
+      if (state.pairStart) {
+        /* block literals */
+        if (stream.match(/^\s*(\||\>)\s*/)) { state.literal = true; return 'meta'; };
+        /* references */
+        if (stream.match(/^\s*(\&|\*)[a-z0-9\._-]+\b/i)) { return 'variable-2'; }
+        /* numbers */
+        if (state.inlinePairs == 0 && stream.match(/^\s*-?[0-9\.\,]+\s?$/)) { return 'number'; }
+        if (state.inlinePairs > 0 && stream.match(/^\s*-?[0-9\.\,]+\s?(?=(,|}))/)) { return 'number'; }
+        /* keywords */
+        if (stream.match(keywordRegex)) { return 'keyword'; }
+      }
+
+      /* pairs (associative arrays) -> key */
+      if (!state.pair && stream.match(/^\s*(?:[,\[\]{}&*!|>'"%@`][^\s'":]|[^,\[\]{}#&*!|>'"%@`])[^#]*?(?=\s*:($|\s))/)) {
+        state.pair = true;
+        state.keyCol = stream.indentation();
+        return "atom";
+      }
+      if (state.pair && stream.match(/^:\s*/)) { state.pairStart = true; return 'meta'; }
+
+      /* nothing found, continue */
+      state.pairStart = false;
+      state.escaped = (ch == '\\');
+      stream.next();
+      return null;
+    },
+    startState: function() {
+      return {
+        pair: false,
+        pairStart: false,
+        keyCol: 0,
+        inlinePairs: 0,
+        inlineList: 0,
+        literal: false,
+        escaped: false
+      };
+    }
+  };
+});
+
+CodeMirror.defineMIME("text/x-yaml", "yaml");
+CodeMirror.defineMIME("text/yaml", "yaml");
+
+});
diff --git a/test/config/authentication.ini b/test/config/authentication.ini
new file mode 100644
index 0000000..6852ece
--- /dev/null
+++ b/test/config/authentication.ini
@@ -0,0 +1,3 @@
+[icingaweb2]
+backend = "db"
+resource = "icingaweb_db"
diff --git a/test/config/config.ini b/test/config/config.ini
new file mode 100644
index 0000000..8fc8330
--- /dev/null
+++ b/test/config/config.ini
@@ -0,0 +1,7 @@
+[global]
+show_stacktraces = "1"
+config_backend = "db"
+config_resource = "icingaweb_db"
+
+[logging]
+log = "none"
diff --git a/test/config/enabledModules/doc b/test/config/enabledModules/doc
new file mode 120000
index 0000000..a9d790e
--- /dev/null
+++ b/test/config/enabledModules/doc
@@ -0,0 +1 @@
+/usr/share/icingaweb2/modules/doc
\ No newline at end of file
diff --git a/test/config/enabledModules/monitoring b/test/config/enabledModules/monitoring
new file mode 120000
index 0000000..c201d00
--- /dev/null
+++ b/test/config/enabledModules/monitoring
@@ -0,0 +1 @@
+/usr/share/icingaweb2/modules/monitoring
\ No newline at end of file
diff --git a/test/config/enabledModules/toplevelview b/test/config/enabledModules/toplevelview
new file mode 120000
index 0000000..71aae1d
--- /dev/null
+++ b/test/config/enabledModules/toplevelview
@@ -0,0 +1 @@
+/usr/share/icingaweb2/modules/toplevelview
\ No newline at end of file
diff --git a/test/config/enabledModules/translation b/test/config/enabledModules/translation
new file mode 120000
index 0000000..45b66cf
--- /dev/null
+++ b/test/config/enabledModules/translation
@@ -0,0 +1 @@
+/usr/share/icingaweb2/modules/translation
\ No newline at end of file
diff --git a/test/config/groups.ini b/test/config/groups.ini
new file mode 100644
index 0000000..6852ece
--- /dev/null
+++ b/test/config/groups.ini
@@ -0,0 +1,3 @@
+[icingaweb2]
+backend = "db"
+resource = "icingaweb_db"
diff --git a/test/config/icingaweb2/authentication.ini b/test/config/icingaweb2/authentication.ini
new file mode 100644
index 0000000..6852ece
--- /dev/null
+++ b/test/config/icingaweb2/authentication.ini
@@ -0,0 +1,3 @@
+[icingaweb2]
+backend = "db"
+resource = "icingaweb_db"
diff --git a/test/config/icingaweb2/config.ini b/test/config/icingaweb2/config.ini
new file mode 100644
index 0000000..8fc8330
--- /dev/null
+++ b/test/config/icingaweb2/config.ini
@@ -0,0 +1,7 @@
+[global]
+show_stacktraces = "1"
+config_backend = "db"
+config_resource = "icingaweb_db"
+
+[logging]
+log = "none"
diff --git a/test/config/icingaweb2/enabledModules/monitoring b/test/config/icingaweb2/enabledModules/monitoring
new file mode 120000
index 0000000..c201d00
--- /dev/null
+++ b/test/config/icingaweb2/enabledModules/monitoring
@@ -0,0 +1 @@
+/usr/share/icingaweb2/modules/monitoring
\ No newline at end of file
diff --git a/test/config/icingaweb2/enabledModules/toplevelview b/test/config/icingaweb2/enabledModules/toplevelview
new file mode 120000
index 0000000..71aae1d
--- /dev/null
+++ b/test/config/icingaweb2/enabledModules/toplevelview
@@ -0,0 +1 @@
+/usr/share/icingaweb2/modules/toplevelview
\ No newline at end of file
diff --git a/test/config/icingaweb2/groups.ini b/test/config/icingaweb2/groups.ini
new file mode 100644
index 0000000..6852ece
--- /dev/null
+++ b/test/config/icingaweb2/groups.ini
@@ -0,0 +1,3 @@
+[icingaweb2]
+backend = "db"
+resource = "icingaweb_db"
diff --git a/test/config/icingaweb2/modules/monitoring/backends.ini b/test/config/icingaweb2/modules/monitoring/backends.ini
new file mode 100644
index 0000000..eed9a90
--- /dev/null
+++ b/test/config/icingaweb2/modules/monitoring/backends.ini
@@ -0,0 +1,3 @@
+[ido]
+type = "ido"
+resource = "icinga_db"
diff --git a/test/config/icingaweb2/resources.ini b/test/config/icingaweb2/resources.ini
new file mode 100644
index 0000000..7dd53ee
--- /dev/null
+++ b/test/config/icingaweb2/resources.ini
@@ -0,0 +1,19 @@
+[icingaweb_db]
+type = "db"
+db = "mysql"
+host = "db"
+port = ""
+dbname = "icingaweb2"
+username = "icingaweb2"
+password = "rosebud"
+charset = ""
+persistent = "0"
+use_ssl = "0"
+
+[icinga_db]
+type = "db"
+db = "mysql"
+host = "db"
+dbname = "icinga"
+username = "icingaweb2"
+password = "rosebud"
diff --git a/test/config/icingaweb2/roles.ini b/test/config/icingaweb2/roles.ini
new file mode 100644
index 0000000..44f14d5
--- /dev/null
+++ b/test/config/icingaweb2/roles.ini
@@ -0,0 +1,4 @@
+[Administratoren]
+users = "icingaadmin"
+permissions = "*"
+groups = "Administratoren"
diff --git a/test/config/modules/monitoring/backends.ini b/test/config/modules/monitoring/backends.ini
new file mode 100644
index 0000000..2611429
--- /dev/null
+++ b/test/config/modules/monitoring/backends.ini
@@ -0,0 +1,8 @@
+[icinga]
+type = "ido"
+resource = "icinga_db"
+
+[legacy]
+type = "ido"
+resource = "icinga_legacy_db"
+;disabled = "1"
diff --git a/test/config/modules/toplevelview/views/.gitignore b/test/config/modules/toplevelview/views/.gitignore
new file mode 100644
index 0000000..355164c
--- /dev/null
+++ b/test/config/modules/toplevelview/views/.gitignore
@@ -0,0 +1 @@
+*/
diff --git a/test/config/modules/toplevelview/views/mass.yml b/test/config/modules/toplevelview/views/mass.yml
new file mode 100644
index 0000000..5bf1ad8
--- /dev/null
+++ b/test/config/modules/toplevelview/views/mass.yml
@@ -0,0 +1,394 @@
+---

+name: More Tiles

+children:

+- name: Section

+  children:

+  - name: Tile

+    children:

+    - host: host_ok

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+- name: Section

+  children:

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_down

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+- name: Section

+  children:

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+- name: Section

+  children:

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_down

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+- name: Section

+  children:

+  - name: Tile

+    children:

+    - host: host_down

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+- name: Section

+  children:

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+- name: Section

+  children:

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+- name: Section

+  children:

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

+  - name: Tile

+    children:

+    - host: host_ok

diff --git a/test/config/modules/toplevelview/views/test.yml b/test/config/modules/toplevelview/views/test.yml
new file mode 100644
index 0000000..789de94
--- /dev/null
+++ b/test/config/modules/toplevelview/views/test.yml
@@ -0,0 +1,75 @@
+---

+name: Test

+children:

+- name: Single Objects

+  children:

+  - name: OK

+    children:

+    - host: host_ok

+    - host: host_ok

+      service: s_ok

+    - host: host_s_soft

+    - host: host_s_soft

+      service: s_critical_soft

+  - name: DOWN

+    children:

+    - host: host_down

+    - host: host_down

+      service: s_critical

+  - name: CRITICAL

+    children:

+    - host: host_s_critical

+    - host: host_s_critical

+      service: s_critical

+  - name: WARNING

+    children:

+    - host: host_s_warning

+    - host: host_s_warning

+      service: s_warning

+- name: Single Objects Handled

+  children:

+  - name: CRITICAL handled

+    children:

+    - host: host_s_critical_handled

+    - host: host_s_critical_handled

+      service: s_critical_handled

+  - name: WARNING handled

+    children:

+    - host: host_s_warning_handled

+    - host: host_s_warning_handled

+      service: s_warning_handled

+- name: Hostgroups

+  children:

+  - name: OK

+    children:

+    - hostgroup: HG_OK

+    - hostgroup: HG_SOFT

+  - name: DOWN

+    children:

+    - hostgroup: HG_DOWN

+  - name: CRITICAL

+    children:

+    - hostgroup: HG_CRITICAL

+  - name: WARNING

+    children:

+    - hostgroup: HG_WARNING

+- name: TLV Missing

+  children:

+  - name: Partially missing

+    children:

+    - host: host_ok

+    - name: missing

+  - name: Missing with problems

+    children:

+    - host: host_down

+    - name: missing

+  - name: Missing with handled

+    children:

+    - host: host_down_handled

+    - name: missing

+  - name: Empty

+    children:

+    - name: nothing here

+  - name: Notexisting Object

+    children:

+    - host: notexisting
\ No newline at end of file
diff --git a/test/config/resources.ini b/test/config/resources.ini
new file mode 100644
index 0000000..2c0c221
--- /dev/null
+++ b/test/config/resources.ini
@@ -0,0 +1,27 @@
+[icingaweb_db]
+type = "db"
+db = "mysql"
+host = "db"
+port = ""
+dbname = "icingaweb2"
+username = "icingaweb2"
+password = "rosebud"
+charset = ""
+persistent = "0"
+use_ssl = "0"
+
+[icinga_db]
+type = "db"
+db = "mysql"
+host = "db"
+dbname = "icinga"
+username = "icingaweb2"
+password = "rosebud"
+
+[icinga_legacy_db]
+type = "db"
+db = "mysql"
+host = "db"
+dbname = "icinga_legacy"
+username = "icingaweb2"
+password = "rosebud"
diff --git a/test/config/roles.ini b/test/config/roles.ini
new file mode 100644
index 0000000..44f14d5
--- /dev/null
+++ b/test/config/roles.ini
@@ -0,0 +1,4 @@
+[Administratoren]
+users = "icingaadmin"
+permissions = "*"
+groups = "Administratoren"
diff --git a/test/docker/Dockerfile b/test/docker/Dockerfile
new file mode 100644
index 0000000..d1ffb4f
--- /dev/null
+++ b/test/docker/Dockerfile
@@ -0,0 +1,5 @@
+FROM lazyfrosch/icingaweb2
+
+RUN apk add -U \
+    php7-pdo_sqlite \
+    sqlite
diff --git a/test/docker/docker-entrypoint-initdb.d/icinga.sh b/test/docker/docker-entrypoint-initdb.d/icinga.sh
new file mode 100644
index 0000000..b0538d4
--- /dev/null
+++ b/test/docker/docker-entrypoint-initdb.d/icinga.sh
@@ -0,0 +1,19 @@
+#!/bin/bash
+
+set -ex
+
+: ${MYSQL_ROOT_PASSWORD:=}
+: ${MYSQL_USER:=}
+
+export MYSQL_PWD="${MYSQL_ROOT_PASSWORD}"
+
+mysql -e "DROP DATABASE IF EXISTS icinga"
+mysql -e "CREATE DATABASE icinga"
+mysql -e "GRANT ALL ON icinga.* TO '${MYSQL_USER}'@'%'"
+mysql -e "DROP DATABASE IF EXISTS icinga_legacy"
+mysql -e "CREATE DATABASE icinga_legacy"
+mysql -e "GRANT ALL ON icinga_legacy.* TO '${MYSQL_USER}'@'%'"
+mysql icinga < /docker-entrypoint-initdb.d/icinga/ido-mysql.sql
+mysql icinga < /docker-entrypoint-initdb.d/icinga/ido-data.sql
+mysql icinga_legacy < /docker-entrypoint-initdb.d/icinga/ido-mysql.sql
+mysql icinga_legacy < /docker-entrypoint-initdb.d/icinga/ido-legacy-data.sql
diff --git a/test/docker/docker-entrypoint-initdb.d/icinga/.gitignore b/test/docker/docker-entrypoint-initdb.d/icinga/.gitignore
new file mode 100644
index 0000000..8cfb08d
--- /dev/null
+++ b/test/docker/docker-entrypoint-initdb.d/icinga/.gitignore
@@ -0,0 +1 @@
+full.sql
diff --git a/test/docker/docker-entrypoint-initdb.d/icinga/dump.sh b/test/docker/docker-entrypoint-initdb.d/icinga/dump.sh
new file mode 100755
index 0000000..54f91a9
--- /dev/null
+++ b/test/docker/docker-entrypoint-initdb.d/icinga/dump.sh
@@ -0,0 +1,22 @@
+#!/bin/bash
+
+set -e
+
+CONFIG="$(docker-compose config)"
+MYSQL_ROOT_PASSWORD="$(echo "$CONFIG" | grep MYSQL_ROOT_PASSWORD | cut -d: -f2 | sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//')"
+
+set -x
+
+docker exec -i \
+    "$(docker-compose ps -q db)" \
+    mysqldump -p"${MYSQL_ROOT_PASSWORD}" --no-create-info icinga \
+    icinga_instances icinga_programstatus icinga_objects \
+    icinga_hosts icinga_hoststatus \
+    icinga_services icinga_servicestatus \
+    icinga_hostgroups icinga_hostgroup_members \
+    > ido-data.sql
+
+docker exec -i \
+    "$(docker-compose ps -q db)" \
+    mysqldump -p"${MYSQL_ROOT_PASSWORD}" icinga \
+    > full.sql
diff --git a/test/docker/docker-entrypoint-initdb.d/icinga/ido-data.sql b/test/docker/docker-entrypoint-initdb.d/icinga/ido-data.sql
new file mode 100644
index 0000000..c1eafe8
--- /dev/null
+++ b/test/docker/docker-entrypoint-initdb.d/icinga/ido-data.sql
@@ -0,0 +1,244 @@
+-- MySQL dump 10.16  Distrib 10.1.18-MariaDB, for debian-linux-gnu (x86_64)
+--
+-- Host: localhost    Database: icinga
+-- ------------------------------------------------------
+-- Server version	10.1.18-MariaDB-1~jessie
+
+/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
+/*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;
+/*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */;
+/*!40101 SET NAMES utf8 */;
+/*!40103 SET @OLD_TIME_ZONE=@@TIME_ZONE */;
+/*!40103 SET TIME_ZONE='+00:00' */;
+/*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */;
+/*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */;
+/*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */;
+
+--
+-- Dumping data for table `icinga_instances`
+--
+
+LOCK
+TABLES `icinga_instances` WRITE;
+/*!40000 ALTER TABLE `icinga_instances` DISABLE KEYS */;
+INSERT INTO `icinga_instances`
+VALUES (1, 'default', 'default');
+/*!40000 ALTER TABLE `icinga_instances` ENABLE KEYS */;
+UNLOCK
+TABLES;
+
+--
+-- Dumping data for table `icinga_programstatus`
+--
+
+LOCK
+TABLES `icinga_programstatus` WRITE;
+/*!40000 ALTER TABLE `icinga_programstatus` DISABLE KEYS */;
+INSERT INTO `icinga_programstatus`
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+/*!40000 ALTER TABLE `icinga_servicestatus` DISABLE KEYS */;
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+UNLOCK
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+--
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+TABLES `icinga_hostgroups` WRITE;
+/*!40000 ALTER TABLE `icinga_hostgroups` DISABLE KEYS */;
+INSERT INTO `icinga_hostgroups`
+VALUES (1, 1, 1, 11, 'HG_OK', NULL, NULL, NULL, NULL),
+       (2, 1, 1, 12, 'HG_SOFT', NULL, NULL, NULL, NULL),
+       (3, 1, 1, 13, 'HG_DOWN', NULL, NULL, NULL, NULL),
+       (4, 1, 1, 14, 'HG_CRITICAL', NULL, NULL, NULL, NULL),
+       (5, 1, 1, 15, 'HG_WARNING', NULL, NULL, NULL, NULL);
+/*!40000 ALTER TABLE `icinga_hostgroups` ENABLE KEYS */;
+UNLOCK
+TABLES;
+
+--
+-- Dumping data for table `icinga_hostgroup_members`
+--
+
+LOCK
+TABLES `icinga_hostgroup_members` WRITE;
+/*!40000 ALTER TABLE `icinga_hostgroup_members` DISABLE KEYS */;
+INSERT INTO `icinga_hostgroup_members`
+VALUES (1, 1, 1, 1),
+       (2, 1, 2, 3),
+       (3, 1, 3, 2),
+       (4, 1, 4, 7),
+       (5, 1, 5, 8);
+/*!40000 ALTER TABLE `icinga_hostgroup_members` ENABLE KEYS */;
+UNLOCK
+TABLES;
+/*!40103 SET TIME_ZONE=@OLD_TIME_ZONE */;
+
+/*!40101 SET SQL_MODE=@OLD_SQL_MODE */;
+/*!40014 SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS */;
+/*!40101 SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT */;
+/*!40101 SET CHARACTER_SET_RESULTS=@OLD_CHARACTER_SET_RESULTS */;
+/*!40101 SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION */;
+/*!40111 SET SQL_NOTES=@OLD_SQL_NOTES */;
+
+-- Dump completed on 2017-10-17 10:05:46
diff --git a/test/docker/docker-entrypoint-initdb.d/icinga/ido-legacy-data.sql b/test/docker/docker-entrypoint-initdb.d/icinga/ido-legacy-data.sql
new file mode 100644
index 0000000..2a1d4bf
--- /dev/null
+++ b/test/docker/docker-entrypoint-initdb.d/icinga/ido-legacy-data.sql
@@ -0,0 +1,78 @@
+INSERT INTO `icinga_instances`
+VALUES (1, 'legacy', 'legacy');
+
+INSERT INTO `icinga_programstatus`
+VALUES (1, 1, '0.0.1', '2017-10-10 10:59:47', '2017-10-10 10:59:47', NULL, NULL, 1, 0, 0, NULL, NULL, 1, NULL, 1, 1, 1,
+        1, 1, 1, 0, 0, 0, 0, 0, 0, NULL, NULL, 0, NULL);
+
+INSERT INTO `icinga_objects`
+VALUES (991, 1, 1, 'host_ok', NULL, 1),
+       (992, 1, 1, 'host_down', NULL, 1),
+       (993, 1, 1, 'host_s_soft', NULL, 1),
+       (994, 1, 2, 'host_ok', 's_ok', 1),
+       (995, 1, 2, 'host_down', 's_critical', 1),
+       (996, 1, 2, 'host_s_soft', 's_critical_soft', 1),
+       (997, 1, 1, 'host_s_critical', NULL, 1),
+       (998, 1, 1, 'host_s_warning', NULL, 1),
+       (999, 1, 2, 'host_s_critical', 's_critical', 1),
+       (9910, 1, 2, 'host_s_warning', 's_warning', 1),
+       (9911, 1, 3, 'HG_OK', NULL, 1),
+       (9912, 1, 3, 'HG_SOFT', NULL, 1),
+       (9913, 1, 3, 'HG_DOWN', NULL, 1),
+       (9914, 1, 3, 'HG_CRITICAL', NULL, 1),
+       (9915, 1, 3, 'HG_WARNING', NULL, 1),
+       (9916, 1, 1, 'host_s_critical_handled', NULL, 1),
+       (9917, 1, 1, 'host_s_warning_handled', NULL, 1),
+       (9918, 1, 2, 'host_s_critical_handled', 's_critical_handled', 1),
+       (9919, 1, 2, 'host_s_warning_handled', 's_warning_handled', 1),
+       (9920, 1, 9, '24x7', NULL, 1);
+
+INSERT INTO `icinga_hosts`
+VALUES (1, 1, 1, 991, 'host_ok', 'host_ok', '127.0.0.1', '', 0, NULL, 0, NULL, 20, 0, '', 5, 1, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 1, 0, 0, NULL, NULL, NULL, NULL, NULL, NULL, NULL, 0, 0, 0, 0, 0, 0, 0, NULL),
+       (2, 1, 1, 992, 'host_down', 'host_down', '127.0.0.1', '', 0, NULL, 0, NULL, 20, 0, '', 5, 1, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 1, 0, 0, NULL, NULL, NULL, NULL, NULL, NULL, NULL, 0, 0, 0, 0, 0, 0, 0, NULL),
+       (3, 1, 1, 993, 'host_s_soft', 'host_s_soft', '127.0.0.1', '', 0, NULL, 0, NULL, 20, 0, '', 5, 1, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 1, 0, 0, NULL, NULL, NULL, NULL, NULL, NULL, NULL, 0, 0, 0, 0, 0, 0, 0, NULL),
+       (4, 1, 1, 997, 'host_s_critical', 'host_s_critical', '127.0.0.1', '', 0, NULL, 0, NULL, 20, 0, '', 5, 1, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 1, 0, 0, NULL, NULL, NULL, NULL, NULL, NULL, NULL, 0, 0, 0, 0, 0, 0, 0, NULL),
+       (5, 1, 1, 998, 'host_s_warning', 'host_s_warning', '127.0.0.1', '', 0, NULL, 0, NULL, 20, 0, '', 5, 1, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 1, 0, 0, NULL, NULL, NULL, NULL, NULL, NULL, NULL, 0, 0, 0, 0, 0, 0, 0, NULL),
+       (6, 1, 1, 9916, 'host_s_critical_handled', 'host_s_critical_handled', '127.0.0.1', '', 0, NULL, 0, NULL, 20, 0, '', 5, 1, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 1, 0, 0, NULL, NULL, NULL, NULL, NULL, NULL, NULL, 0, 0, 0, 0, 0, 0, 0, NULL),
+       (7, 1, 1, 9917, 'host_s_warning_handled', 'host_s_warning_handled', '127.0.0.1', '', 0, NULL, 0, NULL, 20, 0, '', 5, 1, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 1, 0, 0, NULL, NULL, NULL, NULL, NULL, NULL, NULL, 0, 0, 0, 0, 0, 0, 0, NULL);
+
+INSERT INTO `icinga_hoststatus`
+VALUES (1, 1, 991, '2017-10-10 11:01:51', 'TEST', NULL, NULL, '', 0, 1, 0, 1, 5, '2017-10-10 11:01:51', '2017-10-10 11:06:51', 0, '2017-10-10 11:01:51', '2017-10-10 11:01:51', 0, '2017-10-10 11:01:51', NULL, NULL, 1, NULL, NULL, 0, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, NULL, NULL, NULL, 0, 0, 0, 0, NULL),
+       (2, 1, 992, '2017-10-10 11:01:51', 'TEST', NULL, NULL, '', 1, 1, 0, 1, 5, '2017-10-10 11:01:51', '2017-10-10 11:06:51', 0, '2017-10-10 11:01:51', '2017-10-10 11:01:51', 1, '2017-10-10 11:01:51', '2017-10-10 11:01:51', NULL, 1, NULL, NULL, 0, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, NULL, NULL, NULL, 0, 0, 0, 0, NULL),
+       (3, 1, 993, '2017-10-10 11:01:51', 'TEST', NULL, NULL, '', 0, 1, 0, 1, 5, '2017-10-10 11:01:51', '2017-10-10 11:06:51', 0, '2017-10-10 11:01:51', '2017-10-10 11:01:51', 0, '2017-10-10 11:01:51', NULL, NULL, 1, NULL, NULL, 0, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, NULL, NULL, NULL, 0, 0, 0, 0, NULL),
+       (4, 1, 997, '2017-10-10 11:01:51', 'TEST', NULL, NULL, '', 0, 1, 0, 1, 5, '2017-10-10 11:01:51', '2017-10-10 11:06:51', 0, '2017-10-10 11:01:51', '2017-10-10 11:01:51', 0, '2017-10-10 11:01:51', NULL, NULL, 1, NULL, NULL, 0, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, NULL, NULL, NULL, 0, 0, 0, 0, NULL),
+       (5, 1, 998, '2017-10-10 11:01:51', 'TEST', NULL, NULL, '', 0, 1, 0, 1, 5, '2017-10-10 11:01:51', '2017-10-10 11:06:51', 0, '2017-10-10 11:01:51', '2017-10-10 11:01:51', 0, '2017-10-10 11:01:51', NULL, NULL, 1, NULL, NULL, 0, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, NULL, NULL, NULL, 0, 0, 0, 0, NULL),
+       (6, 1, 9916, '2017-10-10 11:01:51', 'TEST', NULL, NULL, '', 0, 1, 0, 1, 5, '2017-10-10 11:01:51', '2017-10-10 11:06:51', 0, '2017-10-10 11:01:51', '2017-10-10 11:01:51', 0, '2017-10-10 11:01:51', NULL, NULL, 1, NULL, NULL, 0, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, NULL, NULL, NULL, 0, 0, 0, 0, NULL),
+       (7, 1, 9917, '2017-10-10 11:01:51', 'TEST', NULL, NULL, '', 0, 1, 0, 1, 5, '2017-10-10 11:01:51', '2017-10-10 11:06:51', 0, '2017-10-10 11:01:51', '2017-10-10 11:01:51', 0, '2017-10-10 11:01:51', NULL, NULL, 1, NULL, NULL, 0, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, NULL, NULL, NULL, 0, 0, 0, 0, NULL);
+
+INSERT INTO `icinga_services`
+VALUES (1, 1, 1, 991, 994, 's_ok', 0, NULL, 0, NULL, 20, 0, '', 5, 1, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 1, 0, 0, NULL, NULL, NULL, NULL, NULL, NULL),
+       (2, 1, 1, 992, 995, 's_critical', 0, NULL, 0, NULL, 20, 0, '', 5, 1, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 1, 0, 0, NULL, NULL, NULL, NULL, NULL, NULL),
+       (3, 1, 1, 993, 996, 's_critical_soft', 0, NULL, 0, NULL, 20, 0, '', 5, 1, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 1, 0, 0, NULL, NULL, NULL, NULL, NULL, NULL),
+       (4, 1, 1, 997, 999, 's_critical', 0, NULL, 0, NULL, 20, 0, '', 5, 1, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 1, 0, 0, NULL, NULL, NULL, NULL, NULL, NULL),
+       (5, 1, 1, 998, 9910, 's_warning', 0, NULL, 0, NULL, 20, 0, '', 5, 1, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 1, 0, 0, NULL, NULL, NULL, NULL, NULL, NULL),
+       (6, 1, 1, 9916, 9918, 's_critical_handled', 0, NULL, 0, NULL, 20, 0, '', 5, 1, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 1, 0, 0, NULL, NULL, NULL, NULL, NULL, NULL),
+       (7, 1, 1, 9917, 9919, 's_warning_handled', 0, NULL, 0, NULL, 20, 0, '', 5, 1, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 1, 0, 0, NULL, NULL, NULL, NULL, NULL, NULL);
+
+INSERT INTO `icinga_servicestatus`
+VALUES (1, 1, 994, '2017-10-10 11:16:38', 'TEST', NULL, NULL, '', 0, 1, 0, 1, 5, '2017-10-10 11:17:01', '2017-10-10 11:22:03', 1, '2017-10-10 11:17:11', '2017-10-10 11:17:11', 0, '2017-10-10 11:17:11', NULL, NULL, NULL, 1, NULL, NULL, 0, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, NULL, NULL, NULL, 5, 1, 0, 0, NULL),
+       (2, 1, 995, '2017-10-10 11:16:38', 'TEST', NULL, NULL, '', 2, 1, 0, 1, 5, '2017-10-10 11:17:01', '2017-10-10 11:22:03', 1, '2017-10-10 11:17:11', '2017-10-10 11:17:11', 1, '2017-10-10 11:17:11', NULL, NULL, NULL, 1, NULL, NULL, 0, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, NULL, NULL, NULL, 5, 1, 0, 0, NULL),
+       (3, 1, 996, '2017-10-10 11:16:38', 'TEST', NULL, NULL, '', 2, 1, 0, 1, 5, '2017-10-10 11:17:01', '2017-10-10 11:22:03', 1, '2017-10-10 11:17:11', '2017-10-10 11:17:11', 0, '2017-10-10 11:17:11', NULL, NULL, NULL, 0, NULL, NULL, 0, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, NULL, NULL, NULL, 5, 1, 0, 0, NULL),
+       (4, 1, 999, '2017-10-10 11:16:38', 'TEST', NULL, NULL, '', 2, 1, 0, 1, 5, '2017-10-10 11:17:01', '2017-10-10 11:22:03', 1, '2017-10-10 11:17:11', '2017-10-10 11:17:11', 2, '2017-10-10 11:17:11', NULL, NULL, NULL, 1, NULL, NULL, 0, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, NULL, NULL, NULL, 5, 1, 0, 0, NULL),
+       (5, 1, 9910, '2017-10-10 11:16:38', 'TEST', NULL, NULL, '', 1, 1, 0, 1, 5, '2017-10-10 11:17:01', '2017-10-10 11:22:03', 1, '2017-10-10 11:17:11', '2017-10-10 11:17:11', 1, '2017-10-10 11:17:11', NULL, NULL, NULL, 1, NULL, NULL, 0, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, NULL, NULL, NULL, 5, 1, 0, 0, NULL),
+       (6, 1, 9919, '2017-10-10 11:16:38', 'TEST', NULL, NULL, '', 1, 1, 0, 1, 5, '2017-10-10 11:17:01', '2017-10-10 11:22:03', 1, '2017-10-10 11:17:11', '2017-10-10 11:17:11', 1, '2017-10-10 11:17:11', NULL, NULL, NULL, 1, NULL, NULL, 0, 1, 1, 3, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, NULL, NULL, NULL, 5, 1, 0, 0, NULL),
+       (7, 1, 9918, '2017-10-10 11:16:38', 'TEST', NULL, NULL, '', 2, 1, 0, 1, 5, '2017-10-10 11:17:01', '2017-10-10 11:22:03', 1, '2017-10-10 11:17:11', '2017-10-10 11:17:11', 1, '2017-10-10 11:17:11', NULL, NULL, NULL, 1, NULL, NULL, 0, 1, 1, 3, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, NULL, NULL, NULL, 5, 1, 0, 0, NULL);
+
+INSERT INTO `icinga_hostgroups`
+VALUES (1, 1, 1, 9911, 'HG_OK', NULL, NULL, NULL, NULL),
+       (2, 1, 1, 9912, 'HG_SOFT', NULL, NULL, NULL, NULL),
+       (3, 1, 1, 9913, 'HG_DOWN', NULL, NULL, NULL, NULL),
+       (4, 1, 1, 9914, 'HG_CRITICAL', NULL, NULL, NULL, NULL),
+       (5, 1, 1, 9915, 'HG_WARNING', NULL, NULL, NULL, NULL);
+
+INSERT INTO `icinga_hostgroup_members`
+VALUES (1, 1, 1, 991),
+       (2, 1, 2, 993),
+       (3, 1, 3, 992),
+       (4, 1, 4, 997),
+       (5, 1, 5, 998);
diff --git a/test/docker/docker-entrypoint-initdb.d/icinga/ido-mysql.sql b/test/docker/docker-entrypoint-initdb.d/icinga/ido-mysql.sql
new file mode 100644
index 0000000..77f022b
--- /dev/null
+++ b/test/docker/docker-entrypoint-initdb.d/icinga/ido-mysql.sql
@@ -0,0 +1,1690 @@
+-- --------------------------------------------------------
+-- mysql.sql
+-- DB definition for IDO MySQL
+--
+-- Copyright (c) 2009-2016 Icinga Development Team (https://www.icinga.com/)
+--
+-- -- --------------------------------------------------------
+
+/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
+/*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;
+/*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */;
+/*!40101 SET NAMES utf8 */;
+
+--
+-- Database: icinga
+--
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_acknowledgements
+--
+
+CREATE TABLE IF NOT EXISTS icinga_acknowledgements (
+  acknowledgement_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  entry_time timestamp NULL,
+  entry_time_usec  int default 0,
+  acknowledgement_type smallint default 0,
+  object_id bigint unsigned default 0,
+  state smallint default 0,
+  author_name varchar(64) character set latin1  default '',
+  comment_data TEXT character set latin1,
+  is_sticky smallint default 0,
+  persistent_comment smallint default 0,
+  notify_contacts smallint default 0,
+  end_time timestamp NULL,
+  PRIMARY KEY  (acknowledgement_id)
+) ENGINE=InnoDB COMMENT='Current and historical host and service acknowledgements';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_commands
+--
+
+CREATE TABLE IF NOT EXISTS icinga_commands (
+  command_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  config_type smallint default 0,
+  object_id bigint unsigned default 0,
+  command_line TEXT character set latin1,
+  config_hash varchar(64) DEFAULT NULL,
+  PRIMARY KEY  (command_id),
+  UNIQUE KEY instance_id (instance_id,object_id,config_type)
+) ENGINE=InnoDB  COMMENT='Command definitions';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_commenthistory
+--
+
+CREATE TABLE IF NOT EXISTS icinga_commenthistory (
+  commenthistory_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  entry_time timestamp NULL,
+  entry_time_usec  int default 0,
+  comment_type smallint default 0,
+  entry_type smallint default 0,
+  object_id bigint unsigned default 0,
+  comment_time timestamp NULL,
+  internal_comment_id bigint unsigned default 0,
+  author_name varchar(64) character set latin1  default '',
+  comment_data TEXT character set latin1,
+  is_persistent smallint default 0,
+  comment_source smallint default 0,
+  expires smallint default 0,
+  expiration_time timestamp NULL,
+  deletion_time timestamp NULL,
+  deletion_time_usec  int default 0,
+  name TEXT character set latin1 default NULL,
+  PRIMARY KEY  (commenthistory_id),
+  UNIQUE KEY instance_id (instance_id,object_id,comment_time,internal_comment_id)
+) ENGINE=InnoDB  COMMENT='Historical host and service comments';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_comments
+--
+
+CREATE TABLE IF NOT EXISTS icinga_comments (
+  comment_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  entry_time timestamp NULL,
+  entry_time_usec  int default 0,
+  comment_type smallint default 0,
+  entry_type smallint default 0,
+  object_id bigint unsigned default 0,
+  comment_time timestamp NULL,
+  internal_comment_id bigint unsigned default 0,
+  author_name varchar(64) character set latin1  default '',
+  comment_data TEXT character set latin1,
+  is_persistent smallint default 0,
+  comment_source smallint default 0,
+  expires smallint default 0,
+  expiration_time timestamp NULL,
+  name TEXT character set latin1 default NULL,
+  session_token int default NULL,
+  PRIMARY KEY  (comment_id),
+  UNIQUE KEY instance_id (instance_id,object_id,comment_time,internal_comment_id)
+) ENGINE=InnoDB  COMMENT='Usercomments on Icinga objects';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_configfiles
+--
+
+CREATE TABLE IF NOT EXISTS icinga_configfiles (
+  configfile_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  configfile_type smallint default 0,
+  configfile_path varchar(255) character set latin1  default '',
+  PRIMARY KEY  (configfile_id),
+  UNIQUE KEY instance_id (instance_id,configfile_type,configfile_path)
+) ENGINE=InnoDB  COMMENT='Configuration files';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_configfilevariables
+--
+
+CREATE TABLE IF NOT EXISTS icinga_configfilevariables (
+  configfilevariable_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  configfile_id bigint unsigned default 0,
+  varname varchar(64) character set latin1  default '',
+  varvalue TEXT character set latin1,
+  PRIMARY KEY  (configfilevariable_id)
+) ENGINE=InnoDB  COMMENT='Configuration file variables';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_conninfo
+--
+
+CREATE TABLE IF NOT EXISTS icinga_conninfo (
+  conninfo_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  agent_name varchar(32) character set latin1  default '',
+  agent_version varchar(32) character set latin1  default '',
+  disposition varchar(32) character set latin1  default '',
+  connect_source varchar(32) character set latin1  default '',
+  connect_type varchar(32) character set latin1  default '',
+  connect_time timestamp NULL,
+  disconnect_time timestamp NULL,
+  last_checkin_time timestamp NULL,
+  data_start_time timestamp NULL,
+  data_end_time timestamp NULL,
+  bytes_processed bigint unsigned  default '0',
+  lines_processed bigint unsigned  default '0',
+  entries_processed bigint unsigned  default '0',
+  PRIMARY KEY  (conninfo_id)
+) ENGINE=InnoDB  COMMENT='IDO2DB daemon connection information';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_contactgroups
+--
+
+CREATE TABLE IF NOT EXISTS icinga_contactgroups (
+  contactgroup_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  config_type smallint default 0,
+  contactgroup_object_id bigint unsigned default 0,
+  alias varchar(255) character set latin1  default '',
+  config_hash varchar(64) DEFAULT NULL,
+  PRIMARY KEY  (contactgroup_id),
+  UNIQUE KEY instance_id (instance_id,config_type,contactgroup_object_id)
+) ENGINE=InnoDB  COMMENT='Contactgroup definitions';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_contactgroup_members
+--
+
+CREATE TABLE IF NOT EXISTS icinga_contactgroup_members (
+  contactgroup_member_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  contactgroup_id bigint unsigned default 0,
+  contact_object_id bigint unsigned default 0,
+  PRIMARY KEY  (contactgroup_member_id)
+) ENGINE=InnoDB  COMMENT='Contactgroup members';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_contactnotificationmethods
+--
+
+CREATE TABLE IF NOT EXISTS icinga_contactnotificationmethods (
+  contactnotificationmethod_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  contactnotification_id bigint unsigned default 0,
+  start_time timestamp NULL,
+  start_time_usec  int default 0,
+  end_time timestamp NULL,
+  end_time_usec  int default 0,
+  command_object_id bigint unsigned default 0,
+  command_args TEXT character set latin1,
+  PRIMARY KEY  (contactnotificationmethod_id),
+  UNIQUE KEY instance_id (instance_id,contactnotification_id,start_time,start_time_usec)
+) ENGINE=InnoDB  COMMENT='Historical record of contact notification methods';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_contactnotifications
+--
+
+CREATE TABLE IF NOT EXISTS icinga_contactnotifications (
+  contactnotification_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  notification_id bigint unsigned default 0,
+  contact_object_id bigint unsigned default 0,
+  start_time timestamp NULL,
+  start_time_usec  int default 0,
+  end_time timestamp NULL,
+  end_time_usec  int default 0,
+  PRIMARY KEY  (contactnotification_id),
+  UNIQUE KEY instance_id (instance_id,contact_object_id,start_time,start_time_usec)
+) ENGINE=InnoDB  COMMENT='Historical record of contact notifications';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_contacts
+--
+
+CREATE TABLE IF NOT EXISTS icinga_contacts (
+  contact_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  config_type smallint default 0,
+  contact_object_id bigint unsigned default 0,
+  alias varchar(255) character set latin1  default '',
+  email_address varchar(255) character set latin1  default '',
+  pager_address varchar(64) character set latin1  default '',
+  host_timeperiod_object_id bigint unsigned default 0,
+  service_timeperiod_object_id bigint unsigned default 0,
+  host_notifications_enabled smallint default 0,
+  service_notifications_enabled smallint default 0,
+  can_submit_commands smallint default 0,
+  notify_service_recovery smallint default 0,
+  notify_service_warning smallint default 0,
+  notify_service_unknown smallint default 0,
+  notify_service_critical smallint default 0,
+  notify_service_flapping smallint default 0,
+  notify_service_downtime smallint default 0,
+  notify_host_recovery smallint default 0,
+  notify_host_down smallint default 0,
+  notify_host_unreachable smallint default 0,
+  notify_host_flapping smallint default 0,
+  notify_host_downtime smallint default 0,
+  config_hash varchar(64) DEFAULT NULL,
+  PRIMARY KEY  (contact_id),
+  UNIQUE KEY instance_id (instance_id,config_type,contact_object_id)
+) ENGINE=InnoDB  COMMENT='Contact definitions';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_contactstatus
+--
+
+CREATE TABLE IF NOT EXISTS icinga_contactstatus (
+  contactstatus_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  contact_object_id bigint unsigned default 0,
+  status_update_time timestamp NULL,
+  host_notifications_enabled smallint default 0,
+  service_notifications_enabled smallint default 0,
+  last_host_notification timestamp NULL,
+  last_service_notification timestamp NULL,
+  modified_attributes  int default 0,
+  modified_host_attributes  int default 0,
+  modified_service_attributes  int default 0,
+  PRIMARY KEY  (contactstatus_id),
+  UNIQUE KEY contact_object_id (contact_object_id)
+) ENGINE=InnoDB  COMMENT='Contact status';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_contact_addresses
+--
+
+CREATE TABLE IF NOT EXISTS icinga_contact_addresses (
+  contact_address_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  contact_id bigint unsigned default 0,
+  address_number smallint default 0,
+  address varchar(255) character set latin1  default '',
+  PRIMARY KEY  (contact_address_id),
+  UNIQUE KEY contact_id (contact_id,address_number)
+) ENGINE=InnoDB COMMENT='Contact addresses';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_contact_notificationcommands
+--
+
+CREATE TABLE IF NOT EXISTS icinga_contact_notificationcommands (
+  contact_notificationcommand_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  contact_id bigint unsigned default 0,
+  notification_type smallint default 0,
+  command_object_id bigint unsigned default 0,
+  command_args varchar(255) character set latin1  default '',
+  PRIMARY KEY  (contact_notificationcommand_id),
+  UNIQUE KEY contact_id (contact_id,notification_type,command_object_id,command_args)
+) ENGINE=InnoDB  COMMENT='Contact host and service notification commands';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_customvariables
+--
+
+CREATE TABLE IF NOT EXISTS icinga_customvariables (
+  customvariable_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  object_id bigint unsigned default 0,
+  config_type smallint default 0,
+  has_been_modified smallint default 0,
+  varname varchar(255) character set latin1 collate latin1_general_cs default NULL,
+  varvalue TEXT character set latin1,
+  is_json smallint default 0,
+  PRIMARY KEY  (customvariable_id),
+  UNIQUE KEY object_id_2 (object_id,config_type,varname),
+  KEY varname (varname)
+) ENGINE=InnoDB COMMENT='Custom variables';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_customvariablestatus
+--
+
+CREATE TABLE IF NOT EXISTS icinga_customvariablestatus (
+  customvariablestatus_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  object_id bigint unsigned default 0,
+  status_update_time timestamp NULL,
+  has_been_modified smallint default 0,
+  varname varchar(255) character set latin1 collate latin1_general_cs default NULL,
+  varvalue TEXT character set latin1,
+  is_json smallint default 0,
+  PRIMARY KEY  (customvariablestatus_id),
+  UNIQUE KEY object_id_2 (object_id,varname),
+  KEY varname (varname)
+) ENGINE=InnoDB COMMENT='Custom variable status information';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_dbversion
+--
+
+CREATE TABLE IF NOT EXISTS icinga_dbversion (
+  dbversion_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  name varchar(10) character set latin1  default '',
+  version varchar(10) character set latin1  default '',
+  create_time timestamp NULL,
+  modify_time timestamp NULL,
+  PRIMARY KEY (dbversion_id),
+  UNIQUE KEY dbversion (name)
+) ENGINE=InnoDB;
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_downtimehistory
+--
+
+CREATE TABLE IF NOT EXISTS icinga_downtimehistory (
+  downtimehistory_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  downtime_type smallint default 0,
+  object_id bigint unsigned default 0,
+  entry_time timestamp NULL,
+  author_name varchar(64) character set latin1  default '',
+  comment_data TEXT character set latin1,
+  internal_downtime_id bigint unsigned default 0,
+  triggered_by_id bigint unsigned default 0,
+  is_fixed smallint default 0,
+  duration bigint(20) default 0,
+  scheduled_start_time timestamp NULL,
+  scheduled_end_time timestamp NULL,
+  was_started smallint default 0,
+  actual_start_time timestamp NULL,
+  actual_start_time_usec  int default 0,
+  actual_end_time timestamp NULL,
+  actual_end_time_usec  int default 0,
+  was_cancelled smallint default 0,
+  is_in_effect smallint default 0,
+  trigger_time timestamp NULL,
+  name TEXT character set latin1 default NULL,
+  PRIMARY KEY  (downtimehistory_id),
+  UNIQUE KEY instance_id (instance_id,object_id,entry_time,internal_downtime_id)
+) ENGINE=InnoDB  COMMENT='Historical scheduled host and service downtime';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_eventhandlers
+--
+
+CREATE TABLE IF NOT EXISTS icinga_eventhandlers (
+  eventhandler_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  eventhandler_type smallint default 0,
+  object_id bigint unsigned default 0,
+  state smallint default 0,
+  state_type smallint default 0,
+  start_time timestamp NULL,
+  start_time_usec  int default 0,
+  end_time timestamp NULL,
+  end_time_usec  int default 0,
+  command_object_id bigint unsigned default 0,
+  command_args TEXT character set latin1,
+  command_line TEXT character set latin1,
+  timeout smallint default 0,
+  early_timeout smallint default 0,
+  execution_time double  default '0',
+  return_code smallint default 0,
+  output TEXT character set latin1,
+  long_output TEXT,
+  PRIMARY KEY  (eventhandler_id),
+  UNIQUE KEY instance_id (instance_id,object_id,start_time,start_time_usec)
+) ENGINE=InnoDB COMMENT='Historical host and service event handlers';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_externalcommands
+--
+
+CREATE TABLE IF NOT EXISTS icinga_externalcommands (
+  externalcommand_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  entry_time timestamp NULL,
+  command_type smallint default 0,
+  command_name varchar(128) character set latin1  default '',
+  command_args TEXT character set latin1,
+  PRIMARY KEY  (externalcommand_id)
+) ENGINE=InnoDB  COMMENT='Historical record of processed external commands';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_flappinghistory
+--
+
+CREATE TABLE IF NOT EXISTS icinga_flappinghistory (
+  flappinghistory_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  event_time timestamp NULL,
+  event_time_usec  int default 0,
+  event_type smallint default 0,
+  reason_type smallint default 0,
+  flapping_type smallint default 0,
+  object_id bigint unsigned default 0,
+  percent_state_change double  default '0',
+  low_threshold double  default '0',
+  high_threshold double  default '0',
+  comment_time timestamp NULL,
+  internal_comment_id bigint unsigned default 0,
+  PRIMARY KEY  (flappinghistory_id)
+) ENGINE=InnoDB  COMMENT='Current and historical record of host and service flapping';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_hostchecks
+--
+
+CREATE TABLE IF NOT EXISTS icinga_hostchecks (
+  hostcheck_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  host_object_id bigint unsigned default 0,
+  check_type smallint default 0,
+  is_raw_check smallint default 0,
+  current_check_attempt smallint default 0,
+  max_check_attempts smallint default 0,
+  state smallint default 0,
+  state_type smallint default 0,
+  start_time timestamp NULL,
+  start_time_usec  int default 0,
+  end_time timestamp NULL,
+  end_time_usec  int default 0,
+  command_object_id bigint unsigned default 0,
+  command_args TEXT character set latin1,
+  command_line TEXT character set latin1,
+  timeout smallint default 0,
+  early_timeout smallint default 0,
+  execution_time double  default '0',
+  latency double  default '0',
+  return_code smallint default 0,
+  output TEXT character set latin1,
+  long_output TEXT,
+  perfdata TEXT character set latin1,
+  PRIMARY KEY  (hostcheck_id)
+) ENGINE=InnoDB  COMMENT='Historical host checks';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_hostdependencies
+--
+
+CREATE TABLE IF NOT EXISTS icinga_hostdependencies (
+  hostdependency_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  config_type smallint default 0,
+  host_object_id bigint unsigned default 0,
+  dependent_host_object_id bigint unsigned default 0,
+  dependency_type smallint default 0,
+  inherits_parent smallint default 0,
+  timeperiod_object_id bigint unsigned default 0,
+  fail_on_up smallint default 0,
+  fail_on_down smallint default 0,
+  fail_on_unreachable smallint default 0,
+  PRIMARY KEY  (hostdependency_id),
+  KEY instance_id (instance_id,config_type,host_object_id,dependent_host_object_id,dependency_type,inherits_parent,fail_on_up,fail_on_down,fail_on_unreachable)
+) ENGINE=InnoDB COMMENT='Host dependency definitions';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_hostescalations
+--
+
+CREATE TABLE IF NOT EXISTS icinga_hostescalations (
+  hostescalation_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  config_type smallint default 0,
+  host_object_id bigint unsigned default 0,
+  timeperiod_object_id bigint unsigned default 0,
+  first_notification smallint default 0,
+  last_notification smallint default 0,
+  notification_interval double  default '0',
+  escalate_on_recovery smallint default 0,
+  escalate_on_down smallint default 0,
+  escalate_on_unreachable smallint default 0,
+  PRIMARY KEY  (hostescalation_id),
+  UNIQUE KEY instance_id (instance_id,config_type,host_object_id,timeperiod_object_id,first_notification,last_notification)
+) ENGINE=InnoDB  COMMENT='Host escalation definitions';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_hostescalation_contactgroups
+--
+
+CREATE TABLE IF NOT EXISTS icinga_hostescalation_contactgroups (
+  hostescalation_contactgroup_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  hostescalation_id bigint unsigned default 0,
+  contactgroup_object_id bigint unsigned default 0,
+  PRIMARY KEY  (hostescalation_contactgroup_id),
+  UNIQUE KEY instance_id (hostescalation_id,contactgroup_object_id)
+) ENGINE=InnoDB  COMMENT='Host escalation contact groups';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_hostescalation_contacts
+--
+
+CREATE TABLE IF NOT EXISTS icinga_hostescalation_contacts (
+  hostescalation_contact_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  hostescalation_id bigint unsigned default 0,
+  contact_object_id bigint unsigned default 0,
+  PRIMARY KEY  (hostescalation_contact_id),
+  UNIQUE KEY instance_id (instance_id,hostescalation_id,contact_object_id)
+) ENGINE=InnoDB  COMMENT='Host escalation contacts';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_hostgroups
+--
+
+CREATE TABLE IF NOT EXISTS icinga_hostgroups (
+  hostgroup_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  config_type smallint default 0,
+  hostgroup_object_id bigint unsigned default 0,
+  alias varchar(255) character set latin1  default '',
+  notes TEXT character set latin1  default NULL,
+  notes_url TEXT character set latin1  default NULL,
+  action_url TEXT character set latin1  default NULL,
+  config_hash varchar(64) DEFAULT NULL,
+  PRIMARY KEY  (hostgroup_id),
+  UNIQUE KEY instance_id (instance_id,hostgroup_object_id)
+) ENGINE=InnoDB  COMMENT='Hostgroup definitions';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_hostgroup_members
+--
+
+CREATE TABLE IF NOT EXISTS icinga_hostgroup_members (
+  hostgroup_member_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  hostgroup_id bigint unsigned default 0,
+  host_object_id bigint unsigned default 0,
+  PRIMARY KEY  (hostgroup_member_id)
+) ENGINE=InnoDB  COMMENT='Hostgroup members';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_hosts
+--
+
+CREATE TABLE IF NOT EXISTS icinga_hosts (
+  host_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  config_type smallint default 0,
+  host_object_id bigint unsigned default 0,
+  alias varchar(255) character set latin1  default '',
+  display_name varchar(255) character set latin1 collate latin1_general_cs  default '',
+  address varchar(128) character set latin1  default '',
+  address6 varchar(128) character set latin1  default '',
+  check_command_object_id bigint unsigned default 0,
+  check_command_args TEXT character set latin1,
+  eventhandler_command_object_id bigint unsigned default 0,
+  eventhandler_command_args TEXT character set latin1,
+  notification_timeperiod_object_id bigint unsigned default 0,
+  check_timeperiod_object_id bigint unsigned default 0,
+  failure_prediction_options varchar(128) character set latin1  default '',
+  check_interval double  default '0',
+  retry_interval double  default '0',
+  max_check_attempts smallint default 0,
+  first_notification_delay double  default '0',
+  notification_interval double  default '0',
+  notify_on_down smallint default 0,
+  notify_on_unreachable smallint default 0,
+  notify_on_recovery smallint default 0,
+  notify_on_flapping smallint default 0,
+  notify_on_downtime smallint default 0,
+  stalk_on_up smallint default 0,
+  stalk_on_down smallint default 0,
+  stalk_on_unreachable smallint default 0,
+  flap_detection_enabled smallint default 0,
+  flap_detection_on_up smallint default 0,
+  flap_detection_on_down smallint default 0,
+  flap_detection_on_unreachable smallint default 0,
+  low_flap_threshold double  default '0',
+  high_flap_threshold double  default '0',
+  process_performance_data smallint default 0,
+  freshness_checks_enabled smallint default 0,
+  freshness_threshold int default 0,
+  passive_checks_enabled smallint default 0,
+  event_handler_enabled smallint default 0,
+  active_checks_enabled smallint default 0,
+  retain_status_information smallint default 0,
+  retain_nonstatus_information smallint default 0,
+  notifications_enabled smallint default 0,
+  obsess_over_host smallint default 0,
+  failure_prediction_enabled smallint default 0,
+  notes TEXT character set latin1,
+  notes_url TEXT character set latin1,
+  action_url TEXT character set latin1,
+  icon_image TEXT character set latin1,
+  icon_image_alt TEXT character set latin1,
+  vrml_image TEXT character set latin1,
+  statusmap_image TEXT character set latin1,
+  have_2d_coords smallint default 0,
+  x_2d smallint default 0,
+  y_2d smallint default 0,
+  have_3d_coords smallint default 0,
+  x_3d double  default '0',
+  y_3d double  default '0',
+  z_3d double  default '0',
+  config_hash varchar(64) DEFAULT NULL,
+  PRIMARY KEY  (host_id),
+  UNIQUE KEY instance_id (instance_id,config_type,host_object_id),
+  KEY host_object_id (host_object_id)
+) ENGINE=InnoDB  COMMENT='Host definitions';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_hoststatus
+--
+
+CREATE TABLE IF NOT EXISTS icinga_hoststatus (
+  hoststatus_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  host_object_id bigint unsigned default 0,
+  status_update_time timestamp NULL,
+  output TEXT character set latin1,
+  long_output TEXT,
+  perfdata TEXT character set latin1,
+  check_source varchar(255) character set latin1  default '',
+  current_state smallint default 0,
+  has_been_checked smallint default 0,
+  should_be_scheduled smallint default 0,
+  current_check_attempt smallint default 0,
+  max_check_attempts smallint default 0,
+  last_check timestamp NULL,
+  next_check timestamp NULL,
+  check_type smallint default 0,
+  last_state_change timestamp NULL,
+  last_hard_state_change timestamp NULL,
+  last_hard_state smallint default 0,
+  last_time_up timestamp NULL,
+  last_time_down timestamp NULL,
+  last_time_unreachable timestamp NULL,
+  state_type smallint default 0,
+  last_notification timestamp NULL,
+  next_notification timestamp NULL,
+  no_more_notifications smallint default 0,
+  notifications_enabled smallint default 0,
+  problem_has_been_acknowledged smallint default 0,
+  acknowledgement_type smallint default 0,
+  current_notification_number int unsigned default 0,
+  passive_checks_enabled smallint default 0,
+  active_checks_enabled smallint default 0,
+  event_handler_enabled smallint default 0,
+  flap_detection_enabled smallint default 0,
+  is_flapping smallint default 0,
+  percent_state_change double  default '0',
+  latency double  default '0',
+  execution_time double  default '0',
+  scheduled_downtime_depth smallint default 0,
+  failure_prediction_enabled smallint default 0,
+  process_performance_data smallint default 0,
+  obsess_over_host smallint default 0,
+  modified_host_attributes  int default 0,
+  original_attributes TEXT character set latin1  default NULL,
+  event_handler TEXT character set latin1,
+  check_command TEXT character set latin1,
+  normal_check_interval double  default '0',
+  retry_check_interval double  default '0',
+  check_timeperiod_object_id bigint unsigned default 0,
+  is_reachable smallint default 0,
+  PRIMARY KEY  (hoststatus_id),
+  UNIQUE KEY object_id (host_object_id)
+) ENGINE=InnoDB  COMMENT='Current host status information';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_host_contactgroups
+--
+
+CREATE TABLE IF NOT EXISTS icinga_host_contactgroups (
+  host_contactgroup_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  host_id bigint unsigned default 0,
+  contactgroup_object_id bigint unsigned default 0,
+  PRIMARY KEY  (host_contactgroup_id)
+) ENGINE=InnoDB  COMMENT='Host contact groups';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_host_contacts
+--
+
+CREATE TABLE IF NOT EXISTS icinga_host_contacts (
+  host_contact_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  host_id bigint unsigned default 0,
+  contact_object_id bigint unsigned default 0,
+  PRIMARY KEY  (host_contact_id)
+) ENGINE=InnoDB  COMMENT='Host contacts';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_host_parenthosts
+--
+
+CREATE TABLE IF NOT EXISTS icinga_host_parenthosts (
+  host_parenthost_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  host_id bigint unsigned default 0,
+  parent_host_object_id bigint unsigned default 0,
+  PRIMARY KEY  (host_parenthost_id)
+) ENGINE=InnoDB  COMMENT='Parent hosts';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_instances
+--
+
+CREATE TABLE IF NOT EXISTS icinga_instances (
+  instance_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_name varchar(64) character set latin1  default '',
+  instance_description varchar(128) character set latin1  default '',
+  PRIMARY KEY  (instance_id)
+) ENGINE=InnoDB  COMMENT='Location names of various Icinga installations';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_logentries
+--
+
+CREATE TABLE IF NOT EXISTS icinga_logentries (
+  logentry_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  logentry_time timestamp NULL,
+  entry_time timestamp NULL,
+  entry_time_usec  int default 0,
+  logentry_type  int default 0,
+  logentry_data TEXT character set latin1,
+  realtime_data smallint default 0,
+  inferred_data_extracted smallint default 0,
+  object_id bigint unsigned default NULL,
+  PRIMARY KEY  (logentry_id)
+) ENGINE=InnoDB COMMENT='Historical record of log entries';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_notifications
+--
+
+CREATE TABLE IF NOT EXISTS icinga_notifications (
+  notification_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  notification_type smallint default 0,
+  notification_reason smallint default 0,
+  object_id bigint unsigned default 0,
+  start_time timestamp NULL,
+  start_time_usec  int default 0,
+  end_time timestamp NULL,
+  end_time_usec  int default 0,
+  state smallint default 0,
+  output TEXT character set latin1,
+  long_output TEXT,
+  escalated smallint default 0,
+  contacts_notified smallint default 0,
+  PRIMARY KEY  (notification_id),
+  UNIQUE KEY instance_id (instance_id,object_id,start_time,start_time_usec)
+) ENGINE=InnoDB  COMMENT='Historical record of host and service notifications';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_objects
+--
+
+CREATE TABLE IF NOT EXISTS icinga_objects (
+  object_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  objecttype_id bigint unsigned default 0,
+  name1 varchar(128) character set latin1 collate latin1_general_cs  default '',
+  name2 varchar(128) character set latin1 collate latin1_general_cs default NULL,
+  is_active smallint default 0,
+  PRIMARY KEY  (object_id),
+  KEY objecttype_id (objecttype_id,name1,name2)
+) ENGINE=InnoDB  COMMENT='Current and historical objects of all kinds';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_processevents
+--
+
+CREATE TABLE IF NOT EXISTS icinga_processevents (
+  processevent_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  event_type smallint default 0,
+  event_time timestamp NULL,
+  event_time_usec  int default 0,
+  process_id bigint unsigned default 0,
+  program_name varchar(16) character set latin1  default '',
+  program_version varchar(20) character set latin1  default '',
+  program_date varchar(10) character set latin1  default '',
+  PRIMARY KEY  (processevent_id)
+) ENGINE=InnoDB  COMMENT='Historical Icinga process events';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_programstatus
+--
+
+CREATE TABLE IF NOT EXISTS icinga_programstatus (
+  programstatus_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  program_version varchar(64) character set latin1 collate latin1_general_cs default NULL,
+  status_update_time timestamp NULL,
+  program_start_time timestamp NULL,
+  program_end_time timestamp NULL,
+  endpoint_name varchar(255) character set latin1 collate latin1_general_cs default NULL,
+  is_currently_running smallint default 0,
+  process_id bigint unsigned default 0,
+  daemon_mode smallint default 0,
+  last_command_check timestamp NULL,
+  last_log_rotation timestamp NULL,
+  notifications_enabled smallint default 0,
+  disable_notif_expire_time timestamp NULL,
+  active_service_checks_enabled smallint default 0,
+  passive_service_checks_enabled smallint default 0,
+  active_host_checks_enabled smallint default 0,
+  passive_host_checks_enabled smallint default 0,
+  event_handlers_enabled smallint default 0,
+  flap_detection_enabled smallint default 0,
+  failure_prediction_enabled smallint default 0,
+  process_performance_data smallint default 0,
+  obsess_over_hosts smallint default 0,
+  obsess_over_services smallint default 0,
+  modified_host_attributes  int default 0,
+  modified_service_attributes  int default 0,
+  global_host_event_handler TEXT character set latin1,
+  global_service_event_handler TEXT character set latin1,
+  config_dump_in_progress smallint default 0,
+  PRIMARY KEY  (programstatus_id),
+  UNIQUE KEY instance_id (instance_id)
+) ENGINE=InnoDB  COMMENT='Current program status information';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_runtimevariables
+--
+
+CREATE TABLE IF NOT EXISTS icinga_runtimevariables (
+  runtimevariable_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  varname varchar(64) character set latin1  default '',
+  varvalue TEXT character set latin1,
+  PRIMARY KEY  (runtimevariable_id)
+) ENGINE=InnoDB  COMMENT='Runtime variables from the Icinga daemon';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_scheduleddowntime
+--
+
+CREATE TABLE IF NOT EXISTS icinga_scheduleddowntime (
+  scheduleddowntime_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  downtime_type smallint default 0,
+  object_id bigint unsigned default 0,
+  entry_time timestamp NULL,
+  author_name varchar(64) character set latin1  default '',
+  comment_data TEXT character set latin1,
+  internal_downtime_id bigint unsigned default 0,
+  triggered_by_id bigint unsigned default 0,
+  is_fixed smallint default 0,
+  duration bigint(20) default 0,
+  scheduled_start_time timestamp NULL,
+  scheduled_end_time timestamp NULL,
+  was_started smallint default 0,
+  actual_start_time timestamp NULL,
+  actual_start_time_usec  int default 0,
+  is_in_effect smallint default 0,
+  trigger_time timestamp NULL,
+  name TEXT character set latin1 default NULL,
+  session_token int default NULL,
+  PRIMARY KEY  (scheduleddowntime_id),
+  UNIQUE KEY instance_id (instance_id,object_id,entry_time,internal_downtime_id)
+) ENGINE=InnoDB COMMENT='Current scheduled host and service downtime';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_servicechecks
+--
+
+CREATE TABLE IF NOT EXISTS icinga_servicechecks (
+  servicecheck_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  service_object_id bigint unsigned default 0,
+  check_type smallint default 0,
+  current_check_attempt smallint default 0,
+  max_check_attempts smallint default 0,
+  state smallint default 0,
+  state_type smallint default 0,
+  start_time timestamp NULL,
+  start_time_usec  int default 0,
+  end_time timestamp NULL,
+  end_time_usec  int default 0,
+  command_object_id bigint unsigned default 0,
+  command_args TEXT character set latin1,
+  command_line TEXT character set latin1,
+  timeout smallint default 0,
+  early_timeout smallint default 0,
+  execution_time double  default '0',
+  latency double  default '0',
+  return_code smallint default 0,
+  output TEXT character set latin1,
+  long_output TEXT,
+  perfdata TEXT character set latin1,
+  PRIMARY KEY  (servicecheck_id)
+) ENGINE=InnoDB  COMMENT='Historical service checks';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_servicedependencies
+--
+
+CREATE TABLE IF NOT EXISTS icinga_servicedependencies (
+  servicedependency_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  config_type smallint default 0,
+  service_object_id bigint unsigned default 0,
+  dependent_service_object_id bigint unsigned default 0,
+  dependency_type smallint default 0,
+  inherits_parent smallint default 0,
+  timeperiod_object_id bigint unsigned default 0,
+  fail_on_ok smallint default 0,
+  fail_on_warning smallint default 0,
+  fail_on_unknown smallint default 0,
+  fail_on_critical smallint default 0,
+  PRIMARY KEY  (servicedependency_id),
+  KEY instance_id (instance_id,config_type,service_object_id,dependent_service_object_id,dependency_type,inherits_parent,fail_on_ok,fail_on_warning,fail_on_unknown,fail_on_critical)
+) ENGINE=InnoDB COMMENT='Service dependency definitions';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_serviceescalations
+--
+
+CREATE TABLE IF NOT EXISTS icinga_serviceescalations (
+  serviceescalation_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  config_type smallint default 0,
+  service_object_id bigint unsigned default 0,
+  timeperiod_object_id bigint unsigned default 0,
+  first_notification smallint default 0,
+  last_notification smallint default 0,
+  notification_interval double  default '0',
+  escalate_on_recovery smallint default 0,
+  escalate_on_warning smallint default 0,
+  escalate_on_unknown smallint default 0,
+  escalate_on_critical smallint default 0,
+  PRIMARY KEY  (serviceescalation_id),
+  UNIQUE KEY instance_id (instance_id,config_type,service_object_id,timeperiod_object_id,first_notification,last_notification)
+) ENGINE=InnoDB  COMMENT='Service escalation definitions';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_serviceescalation_contactgroups
+--
+
+CREATE TABLE IF NOT EXISTS icinga_serviceescalation_contactgroups (
+  serviceescalation_contactgroup_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  serviceescalation_id bigint unsigned default 0,
+  contactgroup_object_id bigint unsigned default 0,
+  PRIMARY KEY  (serviceescalation_contactgroup_id),
+  UNIQUE KEY instance_id (serviceescalation_id,contactgroup_object_id)
+) ENGINE=InnoDB  COMMENT='Service escalation contact groups';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_serviceescalation_contacts
+--
+
+CREATE TABLE IF NOT EXISTS icinga_serviceescalation_contacts (
+  serviceescalation_contact_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  serviceescalation_id bigint unsigned default 0,
+  contact_object_id bigint unsigned default 0,
+  PRIMARY KEY  (serviceescalation_contact_id),
+  UNIQUE KEY instance_id (instance_id,serviceescalation_id,contact_object_id)
+) ENGINE=InnoDB  COMMENT='Service escalation contacts';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_servicegroups
+--
+
+CREATE TABLE IF NOT EXISTS icinga_servicegroups (
+  servicegroup_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  config_type smallint default 0,
+  servicegroup_object_id bigint unsigned default 0,
+  alias varchar(255) character set latin1  default '',
+  notes TEXT character set latin1  default NULL,
+  notes_url TEXT character set latin1  default NULL,
+  action_url TEXT character set latin1  default NULL,
+  config_hash varchar(64) DEFAULT NULL,
+  PRIMARY KEY  (servicegroup_id),
+  UNIQUE KEY instance_id (instance_id,config_type,servicegroup_object_id)
+) ENGINE=InnoDB  COMMENT='Servicegroup definitions';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_servicegroup_members
+--
+
+CREATE TABLE IF NOT EXISTS icinga_servicegroup_members (
+  servicegroup_member_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  servicegroup_id bigint unsigned default 0,
+  service_object_id bigint unsigned default 0,
+  PRIMARY KEY  (servicegroup_member_id)
+) ENGINE=InnoDB  COMMENT='Servicegroup members';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_services
+--
+
+CREATE TABLE IF NOT EXISTS icinga_services (
+  service_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  config_type smallint default 0,
+  host_object_id bigint unsigned default 0,
+  service_object_id bigint unsigned default 0,
+  display_name varchar(255) character set latin1 collate latin1_general_cs  default '',
+  check_command_object_id bigint unsigned default 0,
+  check_command_args TEXT character set latin1,
+  eventhandler_command_object_id bigint unsigned default 0,
+  eventhandler_command_args TEXT character set latin1,
+  notification_timeperiod_object_id bigint unsigned default 0,
+  check_timeperiod_object_id bigint unsigned default 0,
+  failure_prediction_options varchar(64) character set latin1  default '',
+  check_interval double  default '0',
+  retry_interval double  default '0',
+  max_check_attempts smallint default 0,
+  first_notification_delay double  default '0',
+  notification_interval double  default '0',
+  notify_on_warning smallint default 0,
+  notify_on_unknown smallint default 0,
+  notify_on_critical smallint default 0,
+  notify_on_recovery smallint default 0,
+  notify_on_flapping smallint default 0,
+  notify_on_downtime smallint default 0,
+  stalk_on_ok smallint default 0,
+  stalk_on_warning smallint default 0,
+  stalk_on_unknown smallint default 0,
+  stalk_on_critical smallint default 0,
+  is_volatile smallint default 0,
+  flap_detection_enabled smallint default 0,
+  flap_detection_on_ok smallint default 0,
+  flap_detection_on_warning smallint default 0,
+  flap_detection_on_unknown smallint default 0,
+  flap_detection_on_critical smallint default 0,
+  low_flap_threshold double  default '0',
+  high_flap_threshold double  default '0',
+  process_performance_data smallint default 0,
+  freshness_checks_enabled smallint default 0,
+  freshness_threshold int default 0,
+  passive_checks_enabled smallint default 0,
+  event_handler_enabled smallint default 0,
+  active_checks_enabled smallint default 0,
+  retain_status_information smallint default 0,
+  retain_nonstatus_information smallint default 0,
+  notifications_enabled smallint default 0,
+  obsess_over_service smallint default 0,
+  failure_prediction_enabled smallint default 0,
+  notes TEXT character set latin1,
+  notes_url TEXT character set latin1,
+  action_url TEXT character set latin1,
+  icon_image TEXT character set latin1,
+  icon_image_alt TEXT character set latin1,
+  config_hash varchar(64) DEFAULT NULL,
+  PRIMARY KEY  (service_id),
+  UNIQUE KEY instance_id (instance_id,config_type,service_object_id),
+  KEY service_object_id (service_object_id)
+) ENGINE=InnoDB  COMMENT='Service definitions';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_servicestatus
+--
+
+CREATE TABLE IF NOT EXISTS icinga_servicestatus (
+  servicestatus_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  service_object_id bigint unsigned default 0,
+  status_update_time timestamp NULL,
+  output TEXT character set latin1,
+  long_output TEXT,
+  perfdata TEXT character set latin1,
+  check_source varchar(255) character set latin1  default '',
+  current_state smallint default 0,
+  has_been_checked smallint default 0,
+  should_be_scheduled smallint default 0,
+  current_check_attempt smallint default 0,
+  max_check_attempts smallint default 0,
+  last_check timestamp NULL,
+  next_check timestamp NULL,
+  check_type smallint default 0,
+  last_state_change timestamp NULL,
+  last_hard_state_change timestamp NULL,
+  last_hard_state smallint default 0,
+  last_time_ok timestamp NULL,
+  last_time_warning timestamp NULL,
+  last_time_unknown timestamp NULL,
+  last_time_critical timestamp NULL,
+  state_type smallint default 0,
+  last_notification timestamp NULL,
+  next_notification timestamp NULL,
+  no_more_notifications smallint default 0,
+  notifications_enabled smallint default 0,
+  problem_has_been_acknowledged smallint default 0,
+  acknowledgement_type smallint default 0,
+  current_notification_number int unsigned default 0,
+  passive_checks_enabled smallint default 0,
+  active_checks_enabled smallint default 0,
+  event_handler_enabled smallint default 0,
+  flap_detection_enabled smallint default 0,
+  is_flapping smallint default 0,
+  percent_state_change double  default '0',
+  latency double  default '0',
+  execution_time double  default '0',
+  scheduled_downtime_depth smallint default 0,
+  failure_prediction_enabled smallint default 0,
+  process_performance_data smallint default 0,
+  obsess_over_service smallint default 0,
+  modified_service_attributes  int default 0,
+  original_attributes TEXT character set latin1  default NULL,
+  event_handler TEXT character set latin1,
+  check_command TEXT character set latin1,
+  normal_check_interval double  default '0',
+  retry_check_interval double  default '0',
+  check_timeperiod_object_id bigint unsigned default 0,
+  is_reachable smallint default 0,
+  PRIMARY KEY  (servicestatus_id),
+  UNIQUE KEY object_id (service_object_id)
+) ENGINE=InnoDB  COMMENT='Current service status information';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_service_contactgroups
+--
+
+CREATE TABLE IF NOT EXISTS icinga_service_contactgroups (
+  service_contactgroup_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  service_id bigint unsigned default 0,
+  contactgroup_object_id bigint unsigned default 0,
+  PRIMARY KEY  (service_contactgroup_id)
+) ENGINE=InnoDB  COMMENT='Service contact groups';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_service_contacts
+--
+
+CREATE TABLE IF NOT EXISTS icinga_service_contacts (
+  service_contact_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  service_id bigint unsigned default 0,
+  contact_object_id bigint unsigned default 0,
+  PRIMARY KEY  (service_contact_id)
+) ENGINE=InnoDB  COMMENT='Service contacts';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_statehistory
+--
+
+CREATE TABLE IF NOT EXISTS icinga_statehistory (
+  statehistory_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  state_time timestamp NULL,
+  state_time_usec  int default 0,
+  object_id bigint unsigned default 0,
+  state_change smallint default 0,
+  state smallint default 0,
+  state_type smallint default 0,
+  current_check_attempt smallint default 0,
+  max_check_attempts smallint default 0,
+  last_state smallint default 0,
+  last_hard_state smallint default 0,
+  output TEXT character set latin1,
+  long_output TEXT,
+  check_source varchar(255) character set latin1 default NULL,
+  PRIMARY KEY  (statehistory_id)
+) ENGINE=InnoDB COMMENT='Historical host and service state changes';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_systemcommands
+--
+
+CREATE TABLE IF NOT EXISTS icinga_systemcommands (
+  systemcommand_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  start_time timestamp NULL,
+  start_time_usec  int default 0,
+  end_time timestamp NULL,
+  end_time_usec  int default 0,
+  command_line TEXT character set latin1,
+  timeout smallint default 0,
+  early_timeout smallint default 0,
+  execution_time double  default '0',
+  return_code smallint default 0,
+  output TEXT character set latin1,
+  long_output TEXT,
+  PRIMARY KEY  (systemcommand_id),
+  UNIQUE KEY instance_id (instance_id,start_time,start_time_usec)
+) ENGINE=InnoDB  COMMENT='Historical system commands that are executed';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_timeperiods
+--
+
+CREATE TABLE IF NOT EXISTS icinga_timeperiods (
+  timeperiod_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  config_type smallint default 0,
+  timeperiod_object_id bigint unsigned default 0,
+  alias varchar(255) character set latin1  default '',
+  config_hash varchar(64) DEFAULT NULL,
+  PRIMARY KEY  (timeperiod_id),
+  UNIQUE KEY instance_id (instance_id,config_type,timeperiod_object_id)
+) ENGINE=InnoDB  COMMENT='Timeperiod definitions';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_timeperiod_timeranges
+--
+
+CREATE TABLE IF NOT EXISTS icinga_timeperiod_timeranges (
+  timeperiod_timerange_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  timeperiod_id bigint unsigned default 0,
+  day smallint default 0,
+  start_sec  int default 0,
+  end_sec  int default 0,
+  PRIMARY KEY  (timeperiod_timerange_id)
+) ENGINE=InnoDB  COMMENT='Timeperiod definitions';
+
+
+-- --------------------------------------------------------
+-- Icinga 2 specific schema extensions
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_endpoints
+--
+
+CREATE TABLE IF NOT EXISTS icinga_endpoints (
+  endpoint_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  endpoint_object_id bigint(20) unsigned DEFAULT '0',
+  zone_object_id bigint(20) unsigned DEFAULT '0',
+  config_type smallint(6) DEFAULT '0',
+  identity varchar(255) DEFAULT NULL,
+  node varchar(255) DEFAULT NULL,
+  config_hash varchar(64) DEFAULT NULL,
+  PRIMARY KEY  (endpoint_id)
+) ENGINE=InnoDB COMMENT='Endpoint configuration';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_endpointstatus
+--
+
+CREATE TABLE IF NOT EXISTS icinga_endpointstatus (
+  endpointstatus_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  endpoint_object_id bigint(20) unsigned DEFAULT '0',
+  zone_object_id bigint(20) unsigned DEFAULT '0',
+  status_update_time timestamp NULL,
+  identity varchar(255) DEFAULT NULL,
+  node varchar(255) DEFAULT NULL,
+  is_connected smallint(6),
+  PRIMARY KEY  (endpointstatus_id)
+) ENGINE=InnoDB COMMENT='Endpoint status';
+
+--
+-- Table structure for table icinga_zones
+--
+
+CREATE TABLE IF NOT EXISTS icinga_zones (
+  zone_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  zone_object_id bigint(20) unsigned DEFAULT '0',
+  config_type smallint(6) DEFAULT '0',
+  parent_zone_object_id bigint(20) unsigned DEFAULT '0',
+  is_global smallint(6),
+  config_hash varchar(64) DEFAULT NULL,
+  PRIMARY KEY  (zone_id)
+) ENGINE=InnoDB COMMENT='Zone configuration';
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table icinga_zonestatus
+--
+
+CREATE TABLE IF NOT EXISTS icinga_zonestatus (
+  zonestatus_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  instance_id bigint unsigned default 0,
+  zone_object_id bigint(20) unsigned DEFAULT '0',
+  status_update_time timestamp NULL,
+  parent_zone_object_id bigint(20) unsigned DEFAULT '0',
+  PRIMARY KEY  (zonestatus_id)
+) ENGINE=InnoDB COMMENT='Zone status';
+
+
+
+
+ALTER TABLE icinga_servicestatus ADD COLUMN endpoint_object_id bigint default NULL;
+ALTER TABLE icinga_hoststatus ADD COLUMN endpoint_object_id bigint default NULL;
+ALTER TABLE icinga_contactstatus ADD COLUMN endpoint_object_id bigint default NULL;
+ALTER TABLE icinga_programstatus ADD COLUMN endpoint_object_id bigint default NULL;
+ALTER TABLE icinga_comments ADD COLUMN endpoint_object_id bigint default NULL;
+ALTER TABLE icinga_scheduleddowntime ADD COLUMN endpoint_object_id bigint default NULL;
+ALTER TABLE icinga_runtimevariables ADD COLUMN endpoint_object_id bigint default NULL;
+ALTER TABLE icinga_customvariablestatus ADD COLUMN endpoint_object_id bigint default NULL;
+
+ALTER TABLE icinga_acknowledgements ADD COLUMN endpoint_object_id bigint default NULL;
+ALTER TABLE icinga_commenthistory ADD COLUMN endpoint_object_id bigint default NULL;
+ALTER TABLE icinga_contactnotifications ADD COLUMN endpoint_object_id bigint default NULL;
+ALTER TABLE icinga_downtimehistory ADD COLUMN endpoint_object_id bigint default NULL;
+ALTER TABLE icinga_eventhandlers ADD COLUMN endpoint_object_id bigint default NULL;
+ALTER TABLE icinga_externalcommands ADD COLUMN endpoint_object_id bigint default NULL;
+ALTER TABLE icinga_flappinghistory ADD COLUMN endpoint_object_id bigint default NULL;
+ALTER TABLE icinga_hostchecks ADD COLUMN endpoint_object_id bigint default NULL;
+ALTER TABLE icinga_logentries ADD COLUMN endpoint_object_id bigint default NULL;
+ALTER TABLE icinga_notifications ADD COLUMN endpoint_object_id bigint default NULL;
+ALTER TABLE icinga_processevents ADD COLUMN endpoint_object_id bigint default NULL;
+ALTER TABLE icinga_servicechecks ADD COLUMN endpoint_object_id bigint default NULL;
+ALTER TABLE icinga_statehistory ADD COLUMN endpoint_object_id bigint default NULL;
+ALTER TABLE icinga_systemcommands ADD COLUMN endpoint_object_id bigint default NULL;
+
+-- -----------------------------------------
+-- add index (delete)
+-- -----------------------------------------
+
+-- for periodic delete
+-- instance_id and
+-- SYSTEMCOMMANDS, SERVICECHECKS, HOSTCHECKS, EVENTHANDLERS  => start_time
+-- EXTERNALCOMMANDS => entry_time
+
+-- instance_id
+CREATE INDEX systemcommands_i_id_idx on icinga_systemcommands(instance_id);
+CREATE INDEX servicechecks_i_id_idx on icinga_servicechecks(instance_id);
+CREATE INDEX hostchecks_i_id_idx on icinga_hostchecks(instance_id);
+CREATE INDEX eventhandlers_i_id_idx on icinga_eventhandlers(instance_id);
+CREATE INDEX externalcommands_i_id_idx on icinga_externalcommands(instance_id);
+
+-- time
+CREATE INDEX systemcommands_time_id_idx on icinga_systemcommands(start_time);
+CREATE INDEX servicechecks_time_id_idx on icinga_servicechecks(start_time);
+CREATE INDEX hostchecks_time_id_idx on icinga_hostchecks(start_time);
+CREATE INDEX eventhandlers_time_id_idx on icinga_eventhandlers(start_time);
+CREATE INDEX externalcommands_time_id_idx on icinga_externalcommands(entry_time);
+
+
+-- for starting cleanup - referenced in dbhandler.c:882
+-- instance_id only
+
+-- realtime data
+CREATE INDEX programstatus_i_id_idx on icinga_programstatus(instance_id);
+CREATE INDEX hoststatus_i_id_idx on icinga_hoststatus(instance_id);
+CREATE INDEX servicestatus_i_id_idx on icinga_servicestatus(instance_id);
+CREATE INDEX contactstatus_i_id_idx on icinga_contactstatus(instance_id);
+CREATE INDEX comments_i_id_idx on icinga_comments(instance_id);
+CREATE INDEX scheduleddowntime_i_id_idx on icinga_scheduleddowntime(instance_id);
+CREATE INDEX runtimevariables_i_id_idx on icinga_runtimevariables(instance_id);
+CREATE INDEX customvariablestatus_i_id_idx on icinga_customvariablestatus(instance_id);
+
+-- config data
+CREATE INDEX configfiles_i_id_idx on icinga_configfiles(instance_id);
+CREATE INDEX configfilevariables_i_id_idx on icinga_configfilevariables(instance_id);
+CREATE INDEX customvariables_i_id_idx on icinga_customvariables(instance_id);
+CREATE INDEX commands_i_id_idx on icinga_commands(instance_id);
+CREATE INDEX timeperiods_i_id_idx on icinga_timeperiods(instance_id);
+CREATE INDEX timeperiod_timeranges_i_id_idx on icinga_timeperiod_timeranges(instance_id);
+CREATE INDEX contactgroups_i_id_idx on icinga_contactgroups(instance_id);
+CREATE INDEX contactgroup_members_i_id_idx on icinga_contactgroup_members(instance_id);
+CREATE INDEX hostgroups_i_id_idx on icinga_hostgroups(instance_id);
+CREATE INDEX hostgroup_members_i_id_idx on icinga_hostgroup_members(instance_id);
+CREATE INDEX servicegroups_i_id_idx on icinga_servicegroups(instance_id);
+CREATE INDEX servicegroup_members_i_id_idx on icinga_servicegroup_members(instance_id);
+CREATE INDEX hostesc_i_id_idx on icinga_hostescalations(instance_id);
+CREATE INDEX hostesc_contacts_i_id_idx on icinga_hostescalation_contacts(instance_id);
+CREATE INDEX serviceesc_i_id_idx on icinga_serviceescalations(instance_id);
+CREATE INDEX serviceesc_contacts_i_id_idx on icinga_serviceescalation_contacts(instance_id);
+CREATE INDEX hostdependencies_i_id_idx on icinga_hostdependencies(instance_id);
+CREATE INDEX contacts_i_id_idx on icinga_contacts(instance_id);
+CREATE INDEX contact_addresses_i_id_idx on icinga_contact_addresses(instance_id);
+CREATE INDEX contact_notifcommands_i_id_idx on icinga_contact_notificationcommands(instance_id);
+CREATE INDEX hosts_i_id_idx on icinga_hosts(instance_id);
+CREATE INDEX host_parenthosts_i_id_idx on icinga_host_parenthosts(instance_id);
+CREATE INDEX host_contacts_i_id_idx on icinga_host_contacts(instance_id);
+CREATE INDEX services_i_id_idx on icinga_services(instance_id);
+CREATE INDEX service_contacts_i_id_idx on icinga_service_contacts(instance_id);
+CREATE INDEX service_contactgroups_i_id_idx on icinga_service_contactgroups(instance_id);
+CREATE INDEX host_contactgroups_i_id_idx on icinga_host_contactgroups(instance_id);
+CREATE INDEX hostesc_cgroups_i_id_idx on icinga_hostescalation_contactgroups(instance_id);
+CREATE INDEX serviceesc_cgroups_i_id_idx on icinga_serviceescalation_contactgroups(instance_id);
+
+-- -----------------------------------------
+-- more index stuff (WHERE clauses)
+-- -----------------------------------------
+
+-- hosts
+CREATE INDEX hosts_host_object_id_idx on icinga_hosts(host_object_id);
+
+-- hoststatus
+CREATE INDEX hoststatus_stat_upd_time_idx on icinga_hoststatus(status_update_time);
+CREATE INDEX hoststatus_current_state_idx on icinga_hoststatus(current_state);
+CREATE INDEX hoststatus_check_type_idx on icinga_hoststatus(check_type);
+CREATE INDEX hoststatus_state_type_idx on icinga_hoststatus(state_type);
+CREATE INDEX hoststatus_last_state_chg_idx on icinga_hoststatus(last_state_change);
+CREATE INDEX hoststatus_notif_enabled_idx on icinga_hoststatus(notifications_enabled);
+CREATE INDEX hoststatus_problem_ack_idx on icinga_hoststatus(problem_has_been_acknowledged);
+CREATE INDEX hoststatus_act_chks_en_idx on icinga_hoststatus(active_checks_enabled);
+CREATE INDEX hoststatus_pas_chks_en_idx on icinga_hoststatus(passive_checks_enabled);
+CREATE INDEX hoststatus_event_hdl_en_idx on icinga_hoststatus(event_handler_enabled);
+CREATE INDEX hoststatus_flap_det_en_idx on icinga_hoststatus(flap_detection_enabled);
+CREATE INDEX hoststatus_is_flapping_idx on icinga_hoststatus(is_flapping);
+CREATE INDEX hoststatus_p_state_chg_idx on icinga_hoststatus(percent_state_change);
+CREATE INDEX hoststatus_latency_idx on icinga_hoststatus(latency);
+CREATE INDEX hoststatus_ex_time_idx on icinga_hoststatus(execution_time);
+CREATE INDEX hoststatus_sch_downt_d_idx on icinga_hoststatus(scheduled_downtime_depth);
+
+-- services
+CREATE INDEX services_host_object_id_idx on icinga_services(host_object_id);
+
+-- servicestatus
+CREATE INDEX srvcstatus_stat_upd_time_idx on icinga_servicestatus(status_update_time);
+CREATE INDEX srvcstatus_current_state_idx on icinga_servicestatus(current_state);
+CREATE INDEX srvcstatus_check_type_idx on icinga_servicestatus(check_type);
+CREATE INDEX srvcstatus_state_type_idx on icinga_servicestatus(state_type);
+CREATE INDEX srvcstatus_last_state_chg_idx on icinga_servicestatus(last_state_change);
+CREATE INDEX srvcstatus_notif_enabled_idx on icinga_servicestatus(notifications_enabled);
+CREATE INDEX srvcstatus_problem_ack_idx on icinga_servicestatus(problem_has_been_acknowledged);
+CREATE INDEX srvcstatus_act_chks_en_idx on icinga_servicestatus(active_checks_enabled);
+CREATE INDEX srvcstatus_pas_chks_en_idx on icinga_servicestatus(passive_checks_enabled);
+CREATE INDEX srvcstatus_event_hdl_en_idx on icinga_servicestatus(event_handler_enabled);
+CREATE INDEX srvcstatus_flap_det_en_idx on icinga_servicestatus(flap_detection_enabled);
+CREATE INDEX srvcstatus_is_flapping_idx on icinga_servicestatus(is_flapping);
+CREATE INDEX srvcstatus_p_state_chg_idx on icinga_servicestatus(percent_state_change);
+CREATE INDEX srvcstatus_latency_idx on icinga_servicestatus(latency);
+CREATE INDEX srvcstatus_ex_time_idx on icinga_servicestatus(execution_time);
+CREATE INDEX srvcstatus_sch_downt_d_idx on icinga_servicestatus(scheduled_downtime_depth);
+
+-- hostchecks
+CREATE INDEX hostchks_h_obj_id_idx on icinga_hostchecks(host_object_id);
+
+-- servicechecks
+CREATE INDEX servicechks_s_obj_id_idx on icinga_servicechecks(service_object_id);
+
+-- objects
+CREATE INDEX objects_objtype_id_idx ON icinga_objects(objecttype_id);
+CREATE INDEX objects_name1_idx ON icinga_objects(name1);
+CREATE INDEX objects_name2_idx ON icinga_objects(name2);
+CREATE INDEX objects_inst_id_idx ON icinga_objects(instance_id);
+
+-- instances
+-- CREATE INDEX instances_name_idx on icinga_instances(instance_name);
+
+-- logentries
+-- CREATE INDEX loge_instance_id_idx on icinga_logentries(instance_id);
+-- #236
+CREATE INDEX loge_time_idx on icinga_logentries(logentry_time);
+-- CREATE INDEX loge_data_idx on icinga_logentries(logentry_data);
+CREATE INDEX loge_inst_id_time_idx on icinga_logentries (instance_id ASC, logentry_time DESC);
+
+-- commenthistory
+-- CREATE INDEX c_hist_instance_id_idx on icinga_logentries(instance_id);
+-- CREATE INDEX c_hist_c_time_idx on icinga_logentries(comment_time);
+-- CREATE INDEX c_hist_i_c_id_idx on icinga_logentries(internal_comment_id);
+
+-- downtimehistory
+-- CREATE INDEX d_t_hist_nstance_id_idx on icinga_downtimehistory(instance_id);
+-- CREATE INDEX d_t_hist_type_idx on icinga_downtimehistory(downtime_type);
+-- CREATE INDEX d_t_hist_object_id_idx on icinga_downtimehistory(object_id);
+-- CREATE INDEX d_t_hist_entry_time_idx on icinga_downtimehistory(entry_time);
+-- CREATE INDEX d_t_hist_sched_start_idx on icinga_downtimehistory(scheduled_start_time);
+-- CREATE INDEX d_t_hist_sched_end_idx on icinga_downtimehistory(scheduled_end_time);
+
+-- scheduleddowntime
+-- CREATE INDEX sched_d_t_downtime_type_idx on icinga_scheduleddowntime(downtime_type);
+-- CREATE INDEX sched_d_t_object_id_idx on icinga_scheduleddowntime(object_id);
+-- CREATE INDEX sched_d_t_entry_time_idx on icinga_scheduleddowntime(entry_time);
+-- CREATE INDEX sched_d_t_start_time_idx on icinga_scheduleddowntime(scheduled_start_time);
+-- CREATE INDEX sched_d_t_end_time_idx on icinga_scheduleddowntime(scheduled_end_time);
+
+-- statehistory
+CREATE INDEX statehist_i_id_o_id_s_ty_s_ti on icinga_statehistory(instance_id, object_id, state_type, state_time);
+-- #2274
+create index statehist_state_idx on icinga_statehistory(object_id,state);
+
+
+-- Icinga Web Notifications
+CREATE INDEX notification_idx ON icinga_notifications(notification_type, object_id, start_time);
+CREATE INDEX notification_object_id_idx ON icinga_notifications(object_id);
+CREATE INDEX contact_notification_idx ON icinga_contactnotifications(notification_id, contact_object_id);
+CREATE INDEX contacts_object_id_idx ON icinga_contacts(contact_object_id);
+CREATE INDEX contact_notif_meth_notif_idx ON icinga_contactnotificationmethods(contactnotification_id, command_object_id);
+CREATE INDEX command_object_idx ON icinga_commands(object_id);
+CREATE INDEX services_combined_object_idx ON icinga_services(service_object_id, host_object_id);
+
+
+-- #2618
+CREATE INDEX cntgrpmbrs_cgid_coid ON icinga_contactgroup_members (contactgroup_id,contact_object_id);
+CREATE INDEX hstgrpmbrs_hgid_hoid ON icinga_hostgroup_members (hostgroup_id,host_object_id);
+CREATE INDEX hstcntgrps_hid_cgoid ON icinga_host_contactgroups (host_id,contactgroup_object_id);
+CREATE INDEX hstprnthsts_hid_phoid ON icinga_host_parenthosts (host_id,parent_host_object_id);
+CREATE INDEX runtimevars_iid_varn ON icinga_runtimevariables (instance_id,varname);
+CREATE INDEX sgmbrs_sgid_soid ON icinga_servicegroup_members (servicegroup_id,service_object_id);
+CREATE INDEX scgrps_sid_cgoid ON icinga_service_contactgroups (service_id,contactgroup_object_id);
+CREATE INDEX tperiod_tid_d_ss_es ON icinga_timeperiod_timeranges (timeperiod_id,day,start_sec,end_sec);
+
+-- #3649
+CREATE INDEX sla_idx_sthist ON icinga_statehistory (object_id, state_time DESC);
+CREATE INDEX sla_idx_dohist ON icinga_downtimehistory (object_id, actual_start_time, actual_end_time);
+CREATE INDEX sla_idx_obj ON icinga_objects (objecttype_id, is_active, name1);
+
+-- #4985
+CREATE INDEX commenthistory_delete_idx ON icinga_commenthistory (instance_id, comment_time, internal_comment_id);
+
+-- #10070
+CREATE INDEX idx_comments_object_id on icinga_comments(object_id);
+CREATE INDEX idx_scheduleddowntime_object_id on icinga_scheduleddowntime(object_id);
+
+-- #10066
+CREATE INDEX idx_endpoints_object_id on icinga_endpoints(endpoint_object_id);
+CREATE INDEX idx_endpointstatus_object_id on icinga_endpointstatus(endpoint_object_id);
+
+CREATE INDEX idx_endpoints_zone_object_id on icinga_endpoints(zone_object_id);
+CREATE INDEX idx_endpointstatus_zone_object_id on icinga_endpointstatus(zone_object_id);
+
+CREATE INDEX idx_zones_object_id on icinga_zones(zone_object_id);
+CREATE INDEX idx_zonestatus_object_id on icinga_zonestatus(zone_object_id);
+
+CREATE INDEX idx_zones_parent_object_id on icinga_zones(parent_zone_object_id);
+CREATE INDEX idx_zonestatus_parent_object_id on icinga_zonestatus(parent_zone_object_id);
+
+-- #12210
+CREATE INDEX idx_comments_session_del ON icinga_comments (instance_id, session_token);
+CREATE INDEX idx_downtimes_session_del ON icinga_scheduleddowntime (instance_id, session_token);
+
+-- #12107
+CREATE INDEX idx_statehistory_cleanup on icinga_statehistory(instance_id, state_time);
+
+-- #12435
+CREATE INDEX idx_customvariables_object_id on icinga_customvariables(object_id);
+CREATE INDEX idx_contactgroup_members_object_id on icinga_contactgroup_members(contact_object_id);
+CREATE INDEX idx_hostgroup_members_object_id on icinga_hostgroup_members(host_object_id);
+CREATE INDEX idx_servicegroup_members_object_id on icinga_servicegroup_members(service_object_id);
+CREATE INDEX idx_servicedependencies_dependent_service_object_id on icinga_servicedependencies(dependent_service_object_id);
+CREATE INDEX idx_hostdependencies_dependent_host_object_id on icinga_hostdependencies(dependent_host_object_id);
+CREATE INDEX idx_service_contacts_service_id on icinga_service_contacts(service_id);
+CREATE INDEX idx_host_contacts_host_id on icinga_host_contacts(host_id);
+
+-- -----------------------------------------
+-- set dbversion
+-- -----------------------------------------
+INSERT INTO icinga_dbversion (name, version, create_time, modify_time) VALUES ('idoutils', '1.14.2', NOW(), NOW())
+ON DUPLICATE KEY UPDATE version='1.14.2', modify_time=NOW();
+
+
diff --git a/test/docker/docker-entrypoint-initdb.d/icingaweb2.sql b/test/docker/docker-entrypoint-initdb.d/icingaweb2.sql
new file mode 100644
index 0000000..8bd8f3f
--- /dev/null
+++ b/test/docker/docker-entrypoint-initdb.d/icingaweb2.sql
@@ -0,0 +1,138 @@
+-- MySQL dump 10.16  Distrib 10.1.26-MariaDB, for debian-linux-gnu (x86_64)
+--
+-- Host: 127.0.0.1    Database: icingaweb2
+-- ------------------------------------------------------
+-- Server version	10.1.18-MariaDB-1~jessie
+
+/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
+/*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;
+/*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */;
+/*!40101 SET NAMES utf8mb4 */;
+/*!40103 SET @OLD_TIME_ZONE=@@TIME_ZONE */;
+/*!40103 SET TIME_ZONE='+00:00' */;
+/*!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0 */;
+/*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */;
+/*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */;
+/*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */;
+
+--
+-- Table structure for table `icingaweb_group`
+--
+
+DROP TABLE IF EXISTS `icingaweb_group`;
+/*!40101 SET @saved_cs_client     = @@character_set_client */;
+/*!40101 SET character_set_client = utf8 */;
+CREATE TABLE `icingaweb_group` (
+  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
+  `name` varchar(64) CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL,
+  `parent` int(10) unsigned DEFAULT NULL,
+  `ctime` timestamp NULL DEFAULT NULL,
+  `mtime` timestamp NULL DEFAULT NULL ON UPDATE CURRENT_TIMESTAMP,
+  PRIMARY KEY (`id`),
+  UNIQUE KEY `idx_name` (`name`),
+  KEY `fk_icingaweb_group_parent_id` (`parent`),
+  CONSTRAINT `fk_icingaweb_group_parent_id` FOREIGN KEY (`parent`) REFERENCES `icingaweb_group` (`id`)
+) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8;
+/*!40101 SET character_set_client = @saved_cs_client */;
+
+--
+-- Dumping data for table `icingaweb_group`
+--
+
+LOCK TABLES `icingaweb_group` WRITE;
+/*!40000 ALTER TABLE `icingaweb_group` DISABLE KEYS */;
+INSERT INTO `icingaweb_group` VALUES (1,'Administratoren',NULL,'2017-10-10 10:28:43',NULL);
+/*!40000 ALTER TABLE `icingaweb_group` ENABLE KEYS */;
+UNLOCK TABLES;
+
+--
+-- Table structure for table `icingaweb_group_membership`
+--
+
+DROP TABLE IF EXISTS `icingaweb_group_membership`;
+/*!40101 SET @saved_cs_client     = @@character_set_client */;
+/*!40101 SET character_set_client = utf8 */;
+CREATE TABLE `icingaweb_group_membership` (
+  `group_id` int(10) unsigned NOT NULL,
+  `username` varchar(254) CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL,
+  `ctime` timestamp NULL DEFAULT NULL,
+  `mtime` timestamp NULL DEFAULT NULL ON UPDATE CURRENT_TIMESTAMP,
+  PRIMARY KEY (`group_id`,`username`),
+  CONSTRAINT `fk_icingaweb_group_membership_icingaweb_group` FOREIGN KEY (`group_id`) REFERENCES `icingaweb_group` (`id`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+/*!40101 SET character_set_client = @saved_cs_client */;
+
+--
+-- Dumping data for table `icingaweb_group_membership`
+--
+
+LOCK TABLES `icingaweb_group_membership` WRITE;
+/*!40000 ALTER TABLE `icingaweb_group_membership` DISABLE KEYS */;
+INSERT INTO `icingaweb_group_membership` VALUES (1,'icingaadmin','2017-10-10 10:28:43',NULL);
+/*!40000 ALTER TABLE `icingaweb_group_membership` ENABLE KEYS */;
+UNLOCK TABLES;
+
+--
+-- Table structure for table `icingaweb_user`
+--
+
+DROP TABLE IF EXISTS `icingaweb_user`;
+/*!40101 SET @saved_cs_client     = @@character_set_client */;
+/*!40101 SET character_set_client = utf8 */;
+CREATE TABLE `icingaweb_user` (
+  `name` varchar(254) CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL,
+  `active` tinyint(1) NOT NULL,
+  `password_hash` varbinary(255) NOT NULL,
+  `ctime` timestamp NULL DEFAULT NULL,
+  `mtime` timestamp NULL DEFAULT NULL ON UPDATE CURRENT_TIMESTAMP,
+  PRIMARY KEY (`name`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+/*!40101 SET character_set_client = @saved_cs_client */;
+
+--
+-- Dumping data for table `icingaweb_user`
+--
+
+LOCK TABLES `icingaweb_user` WRITE;
+/*!40000 ALTER TABLE `icingaweb_user` DISABLE KEYS */;
+INSERT INTO `icingaweb_user` VALUES ('icingaadmin',1,'$1$Žk}sÔ$Wtk67yqRK61IkZMpritMv.','2017-10-10 10:28:43',NULL);
+/*!40000 ALTER TABLE `icingaweb_user` ENABLE KEYS */;
+UNLOCK TABLES;
+
+--
+-- Table structure for table `icingaweb_user_preference`
+--
+
+DROP TABLE IF EXISTS `icingaweb_user_preference`;
+/*!40101 SET @saved_cs_client     = @@character_set_client */;
+/*!40101 SET character_set_client = utf8 */;
+CREATE TABLE `icingaweb_user_preference` (
+  `username` varchar(254) CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL,
+  `section` varchar(64) CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL,
+  `name` varchar(64) CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL,
+  `value` varchar(255) NOT NULL,
+  `ctime` timestamp NULL DEFAULT NULL,
+  `mtime` timestamp NULL DEFAULT NULL ON UPDATE CURRENT_TIMESTAMP,
+  PRIMARY KEY (`username`,`section`,`name`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+/*!40101 SET character_set_client = @saved_cs_client */;
+
+--
+-- Dumping data for table `icingaweb_user_preference`
+--
+
+LOCK TABLES `icingaweb_user_preference` WRITE;
+/*!40000 ALTER TABLE `icingaweb_user_preference` DISABLE KEYS */;
+/*!40000 ALTER TABLE `icingaweb_user_preference` ENABLE KEYS */;
+UNLOCK TABLES;
+/*!40103 SET TIME_ZONE=@OLD_TIME_ZONE */;
+
+/*!40101 SET SQL_MODE=@OLD_SQL_MODE */;
+/*!40014 SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS */;
+/*!40014 SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS */;
+/*!40101 SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT */;
+/*!40101 SET CHARACTER_SET_RESULTS=@OLD_CHARACTER_SET_RESULTS */;
+/*!40101 SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION */;
+/*!40111 SET SQL_NOTES=@OLD_SQL_NOTES */;
+
+-- Dump completed on 2017-10-10 10:29:24
diff --git a/test/fixtures/sqlite-legacy.sql b/test/fixtures/sqlite-legacy.sql
new file mode 100644
index 0000000..7f19439
--- /dev/null
+++ b/test/fixtures/sqlite-legacy.sql
@@ -0,0 +1,44 @@
+-- sqlite3 -bail /tmp/toplevelview.db </usr/share/icingaweb2/modules/toplevelview/test/fixtures/sqlite-legacy.sql
+PRAGMA foreign_keys=OFF;
+BEGIN TRANSACTION;
+
+CREATE TABLE toplevelview_adminroles (hierarchy_id INTEGER, role_id INTEGER, PRIMARY KEY(hierarchy_id));
+CREATE TABLE toplevelview_cache (hierarchy_id INTEGER, updated datetime, json TEXT, PRIMARY KEY(hierarchy_id));
+CREATE TABLE toplevelview_options (name TEXT, value TEXT, PRIMARY KEY(name));
+
+CREATE TABLE toplevelview_host (id INTEGER PRIMARY KEY AUTOINCREMENT, host_object_id INTEGER, view_id INTEGER);
+INSERT INTO "toplevelview_host" VALUES(1,991,5);
+INSERT INTO "toplevelview_host" VALUES(2,991,6);
+
+CREATE TABLE toplevelview_hostgroup (id INTEGER PRIMARY KEY AUTOINCREMENT, hostgroup_object_id INTEGER, view_id INTEGER);
+INSERT INTO "toplevelview_hostgroup" VALUES(1,9911,2);
+INSERT INTO "toplevelview_hostgroup" VALUES(2,9911,3);
+INSERT INTO "toplevelview_hostgroup" VALUES(3,9911,4);
+INSERT INTO "toplevelview_hostgroup" VALUES(4,9911,5);
+INSERT INTO "toplevelview_hostgroup" VALUES(5,9911,6);
+
+CREATE TABLE toplevelview_service (id INTEGER PRIMARY KEY AUTOINCREMENT, service_object_id INTEGER, view_id INTEGER);
+INSERT INTO "toplevelview_service" VALUES(1,994,5);
+INSERT INTO "toplevelview_service" VALUES(2,994,6);
+
+CREATE TABLE toplevelview_view (id INTEGER PRIMARY KEY AUTOINCREMENT, name VARCHAR(255) NOT NULL, display_name VARCHAR(255) NOT NULL);
+INSERT INTO "toplevelview_view" VALUES(1,'TLV','TLV');
+INSERT INTO "toplevelview_view" VALUES(6,'Icinga','Icinga');
+
+CREATE TABLE toplevelview_view_hierarchy (id INTEGER PRIMARY KEY AUTOINCREMENT, view_id INTEGER, root_id INTEGER, lft INTEGER, rgt INTEGER, level INTEGER);
+INSERT INTO "toplevelview_view_hierarchy" VALUES(1,1,1,1,12,0);
+INSERT INTO "toplevelview_view_hierarchy" VALUES(3,6,1,10,11,1);
+
+DELETE FROM sqlite_sequence;
+INSERT INTO "sqlite_sequence" VALUES('toplevelview_view',6);
+INSERT INTO "sqlite_sequence" VALUES('toplevelview_view_hierarchy',3);
+INSERT INTO "sqlite_sequence" VALUES('toplevelview_hostgroup',5);
+INSERT INTO "sqlite_sequence" VALUES('toplevelview_service',2);
+INSERT INTO "sqlite_sequence" VALUES('toplevelview_host',2);
+
+CREATE UNIQUE INDEX host_in_view_unique_index_idx ON toplevelview_host (view_id, host_object_id);
+CREATE UNIQUE INDEX hostgroup_in_view_unique_index_idx ON toplevelview_hostgroup (view_id, hostgroup_object_id);
+CREATE UNIQUE INDEX service_in_view_unique_index_idx ON toplevelview_service (view_id, service_object_id);
+CREATE INDEX root_id_idx ON toplevelview_view_hierarchy (root_id);
+
+COMMIT;
diff --git a/test/setup_vendor.sh b/test/setup_vendor.sh
new file mode 100755
index 0000000..1dd7e8f
--- /dev/null
+++ b/test/setup_vendor.sh
@@ -0,0 +1,74 @@
+#!/bin/sh
+
+set -ex
+
+MODULE_HOME=${MODULE_HOME:="$(dirname "$(readlink -f $(dirname "$0"))")"}
+PHP_VERSION="$(php -r 'echo phpversion();')"
+
+ICINGAWEB_VERSION=${ICINGAWEB_VERSION:=2.6.2}
+ICINGAWEB_GITREF=${ICINGAWEB_GITREF:=}
+PHPCS_VERSION=${PHPCS_VERSION:=3.3.1}
+
+if [ "$PHP_VERSION" '<' 7.0.0 ]; then
+  PHPUNIT_VERSION=${PHPUNIT_VERSION:=5.7.9}
+elif [ "$PHP_VERSION" '<' 5.6.0 ]; then
+  PHPUNIT_VERSION=${PHPUNIT_VERSION:=4.8.36}
+else
+  PHPUNIT_VERSION=${PHPUNIT_VERSION:=6.5.9}
+fi
+
+cd ${MODULE_HOME}
+
+test -d vendor || mkdir vendor
+cd vendor/
+
+# icingaweb2
+if [ -n "$ICINGAWEB_GITREF" ]; then
+  icingaweb_path="icingaweb2"
+  test ! -L "$icingaweb_path" || rm "$icingaweb_path"
+
+  if [ ! -d "$icingaweb_path" ]; then
+    git clone https://github.com/Icinga/icingaweb2.git "$icingaweb_path"
+  fi
+
+  (
+    set -e
+    cd "$icingaweb_path"
+    git fetch -p
+    git checkout -f "$ICINGAWEB_GITREF"
+  )
+else
+  icingaweb_path="icingaweb2-${ICINGAWEB_VERSION}"
+  if [ ! -e "${icingaweb_path}".tar.gz ]; then
+    wget -O "${icingaweb_path}".tar.gz https://github.com/Icinga/icingaweb2/archive/v"${ICINGAWEB_VERSION}".tar.gz
+  fi
+  if [ ! -d "${icingaweb_path}" ]; then
+    tar xf "${icingaweb_path}".tar.gz
+  fi
+
+  ln -svf "${icingaweb_path}" icingaweb2
+fi
+ln -svf "${icingaweb_path}"/library/Icinga
+ln -svf "${icingaweb_path}"/library/vendor/Zend
+
+# phpunit
+phpunit_path="phpunit-${PHPUNIT_VERSION}"
+if [ ! -e "${phpunit_path}".phar ]; then
+  wget -O "${phpunit_path}".phar https://phar.phpunit.de/phpunit-${PHPUNIT_VERSION}.phar
+fi
+ln -svf "${phpunit_path}".phar phpunit.phar
+
+# phpcs
+phpcs_path="phpcs-${PHPCS_VERSION}"
+if [ ! -e "${phpcs_path}".phar ]; then
+  wget -O "${phpcs_path}".phar \
+    https://github.com/squizlabs/PHP_CodeSniffer/releases/download/${PHPCS_VERSION}/phpcs.phar
+fi
+ln -svf "${phpcs_path}".phar phpcs.phar
+
+phpcbf_path="phpcbf-${PHPCS_VERSION}"
+if [ ! -e "${phpcbf_path}".phar ]; then
+  wget -O "${phpcbf_path}".phar \
+    https://github.com/squizlabs/PHP_CodeSniffer/releases/download/${PHPCS_VERSION}/phpcbf.phar
+fi
+ln -svf "${phpcbf_path}".phar phpcbf.phar