Adding upstream version 2.11.4.upstream/2.11.4upstream

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

1 files changed, 1186 insertions, 0 deletions

diff --git a/library/vendor/Zend/View/Abstract.php b/library/vendor/Zend/View/Abstract.php
new file mode 100644
index 0000000..edb577d
--- /dev/null
+++ b/library/vendor/Zend/View/Abstract.php
@@ -0,0 +1,1186 @@
+<?php
+/**
+ * Zend Framework
+ *
+ * LICENSE
+ *
+ * This source file is subject to the new BSD license that is bundled
+ * with this package in the file LICENSE.txt.
+ * It is also available through the world-wide-web at this URL:
+ * http://framework.zend.com/license/new-bsd
+ * If you did not receive a copy of the license and are unable to
+ * obtain it through the world-wide-web, please send an email
+ * to license@zend.com so we can send you a copy immediately.
+ *
+ * @category   Zend
+ * @package    Zend_View
+ * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ * @version    $Id$
+ */
+
+/** @see Zend_Loader */
+
+/** @see Zend_Loader_PluginLoader */
+
+/** @see Zend_View_Interface */
+
+/**
+ * Abstract class for Zend_View to help enforce private constructs.
+ *
+ * @category   Zend
+ * @package    Zend_View
+ * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ */
+abstract class Zend_View_Abstract implements Zend_View_Interface
+{
+    /**
+     * Path stack for script, helper, and filter directories.
+     *
+     * @var array
+     */
+    private $_path = array(
+        'script' => array(),
+        'helper' => array(),
+        'filter' => array(),
+    );
+
+    /**
+     * Script file name to execute
+     *
+     * @var string
+     */
+    private $_file = null;
+
+    /**
+     * Instances of helper objects.
+     *
+     * @var array
+     */
+    private $_helper = array();
+
+    /**
+     * Map of helper => class pairs to help in determining helper class from
+     * name
+     * @var array
+     */
+    private $_helperLoaded = array();
+
+    /**
+     * Map of helper => classfile pairs to aid in determining helper classfile
+     * @var array
+     */
+    private $_helperLoadedDir = array();
+
+    /**
+     * Stack of Zend_View_Filter names to apply as filters.
+     * @var array
+     */
+    private $_filter = array();
+
+    /**
+     * Stack of Zend_View_Filter objects that have been loaded
+     * @var array
+     */
+    private $_filterClass = array();
+
+    /**
+     * Map of filter => class pairs to help in determining filter class from
+     * name
+     * @var array
+     */
+    private $_filterLoaded = array();
+
+    /**
+     * Map of filter => classfile pairs to aid in determining filter classfile
+     * @var array
+     */
+    private $_filterLoadedDir = array();
+
+    /**
+     * Callback for escaping.
+     *
+     * @var string
+     */
+    private $_escape = 'htmlspecialchars';
+
+    /**
+     * Encoding to use in escaping mechanisms; defaults to utf-8
+     * @var string
+     */
+    private $_encoding = 'UTF-8';
+
+    /**
+     * Flag indicating whether or not LFI protection for rendering view scripts is enabled
+     * @var bool
+     */
+    private $_lfiProtectionOn = true;
+
+    /**
+     * Plugin loaders
+     * @var array
+     */
+    private $_loaders = array();
+
+    /**
+     * Plugin types
+     * @var array
+     */
+    private $_loaderTypes = array('filter', 'helper');
+
+    /**
+     * Strict variables flag; when on, undefined variables accessed in the view
+     * scripts will trigger notices
+     * @var boolean
+     */
+    private $_strictVars = false;
+
+    /**
+     * Constructor.
+     *
+     * @param array $config Configuration key-value pairs.
+     */
+    public function __construct($config = array())
+    {
+        // set inital paths and properties
+        $this->setScriptPath(null);
+
+        // $this->setHelperPath(null);
+        $this->setFilterPath(null);
+
+        // user-defined escaping callback
+        if (array_key_exists('escape', $config)) {
+            $this->setEscape($config['escape']);
+        }
+
+        // encoding
+        if (array_key_exists('encoding', $config)) {
+            $this->setEncoding($config['encoding']);
+        }
+
+        // base path
+        if (array_key_exists('basePath', $config)) {
+            $prefix = 'Zend_View';
+            if (array_key_exists('basePathPrefix', $config)) {
+                $prefix = $config['basePathPrefix'];
+            }
+            $this->setBasePath($config['basePath'], $prefix);
+        }
+
+        // user-defined view script path
+        if (array_key_exists('scriptPath', $config)) {
+            $this->addScriptPath($config['scriptPath']);
+        }
+
+        // user-defined helper path
+        if (array_key_exists('helperPath', $config)) {
+            if (is_array($config['helperPath'])) {
+                foreach ($config['helperPath'] as $prefix => $path) {
+                    $this->addHelperPath($path, $prefix);
+                }
+            } else {
+                $prefix = 'Zend_View_Helper';
+                if (array_key_exists('helperPathPrefix', $config)) {
+                    $prefix = $config['helperPathPrefix'];
+                }
+                $this->addHelperPath($config['helperPath'], $prefix);
+            }
+        }
+
+        // user-defined filter path
+        if (array_key_exists('filterPath', $config)) {
+            if (is_array($config['filterPath'])) {
+                foreach ($config['filterPath'] as $prefix => $path) {
+                    $this->addFilterPath($path, $prefix);
+                }
+            } else {
+                $prefix = 'Zend_View_Filter';
+                if (array_key_exists('filterPathPrefix', $config)) {
+                    $prefix = $config['filterPathPrefix'];
+                }
+                $this->addFilterPath($config['filterPath'], $prefix);
+            }
+        }
+
+        // user-defined filters
+        if (array_key_exists('filter', $config)) {
+            $this->addFilter($config['filter']);
+        }
+
+        // strict vars
+        if (array_key_exists('strictVars', $config)) {
+            $this->strictVars($config['strictVars']);
+        }
+
+        // LFI protection flag
+        if (array_key_exists('lfiProtectionOn', $config)) {
+            $this->setLfiProtection($config['lfiProtectionOn']);
+        }
+
+        if (array_key_exists('assign', $config)
+            && is_array($config['assign'])
+        ) {
+            foreach ($config['assign'] as $key => $value) {
+                $this->assign($key, $value);
+            }
+        }
+
+        $this->init();
+    }
+
+    /**
+     * Return the template engine object
+     *
+     * Returns the object instance, as it is its own template engine
+     *
+     * @return Zend_View_Abstract
+     */
+    public function getEngine()
+    {
+        return $this;
+    }
+
+    /**
+     * Allow custom object initialization when extending Zend_View_Abstract or
+     * Zend_View
+     *
+     * Triggered by {@link __construct() the constructor} as its final action.
+     *
+     * @return void
+     */
+    public function init()
+    {
+    }
+
+    /**
+     * Prevent E_NOTICE for nonexistent values
+     *
+     * If {@link strictVars()} is on, raises a notice.
+     *
+     * @param  string $key
+     * @return null
+     */
+    public function __get($key)
+    {
+        if ($this->_strictVars) {
+            trigger_error('Key "' . $key . '" does not exist', E_USER_NOTICE);
+        }
+
+        return null;
+    }
+
+    /**
+     * Allows testing with empty() and isset() to work inside
+     * templates.
+     *
+     * @param  string $key
+     * @return boolean
+     */
+    public function __isset($key)
+    {
+        if ('_' != substr($key, 0, 1)) {
+            return isset($this->$key);
+        }
+
+        return false;
+    }
+
+    /**
+     * Directly assigns a variable to the view script.
+     *
+     * Checks first to ensure that the caller is not attempting to set a
+     * protected or private member (by checking for a prefixed underscore); if
+     * not, the public member is set; otherwise, an exception is raised.
+     *
+     * @param string $key The variable name.
+     * @param mixed $val The variable value.
+     * @return void
+     * @throws Zend_View_Exception if an attempt to set a private or protected
+     * member is detected
+     */
+    public function __set($key, $val)
+    {
+        if ('_' != substr($key, 0, 1)) {
+            $this->$key = $val;
+            return;
+        }
+
+        $e = new Zend_View_Exception('Setting private or protected class members is not allowed');
+        $e->setView($this);
+        throw $e;
+    }
+
+    /**
+     * Allows unset() on object properties to work
+     *
+     * @param string $key
+     * @return void
+     */
+    public function __unset($key)
+    {
+        if ('_' != substr($key, 0, 1) && isset($this->$key)) {
+            unset($this->$key);
+        }
+    }
+
+    /**
+     * Accesses a helper object from within a script.
+     *
+     * If the helper class has a 'view' property, sets it with the current view
+     * object.
+     *
+     * @param string $name The helper name.
+     * @param array $args The parameters for the helper.
+     * @return string The result of the helper output.
+     */
+    public function __call($name, $args)
+    {
+        // is the helper already loaded?
+        $helper = $this->getHelper($name);
+
+        // call the helper method
+        return call_user_func_array(
+            array($helper, $name),
+            $args
+        );
+    }
+
+    /**
+     * Given a base path, sets the script, helper, and filter paths relative to it
+     *
+     * Assumes a directory structure of:
+     * <code>
+     * basePath/
+     *     scripts/
+     *     helpers/
+     *     filters/
+     * </code>
+     *
+     * @param  string $path
+     * @param  string $prefix Prefix to use for helper and filter paths
+     * @return Zend_View_Abstract
+     */
+    public function setBasePath($path, $classPrefix = 'Zend_View')
+    {
+        $path        = rtrim($path, '/');
+        $path        = rtrim($path, '\\');
+        $path       .= DIRECTORY_SEPARATOR;
+        $classPrefix = rtrim($classPrefix, '_') . '_';
+        $this->setScriptPath($path . 'scripts');
+        $this->setHelperPath($path . 'helpers', $classPrefix . 'Helper');
+        $this->setFilterPath($path . 'filters', $classPrefix . 'Filter');
+        return $this;
+    }
+
+    /**
+     * Given a base path, add script, helper, and filter paths relative to it
+     *
+     * Assumes a directory structure of:
+     * <code>
+     * basePath/
+     *     scripts/
+     *     helpers/
+     *     filters/
+     * </code>
+     *
+     * @param  string $path
+     * @param  string $prefix Prefix to use for helper and filter paths
+     * @return Zend_View_Abstract
+     */
+    public function addBasePath($path, $classPrefix = 'Zend_View')
+    {
+        $path        = rtrim($path, '/');
+        $path        = rtrim($path, '\\');
+        $path       .= DIRECTORY_SEPARATOR;
+        $classPrefix = rtrim($classPrefix, '_') . '_';
+        $this->addScriptPath($path . 'scripts');
+        $this->addHelperPath($path . 'helpers', $classPrefix . 'Helper');
+        $this->addFilterPath($path . 'filters', $classPrefix . 'Filter');
+        return $this;
+    }
+
+    /**
+     * Adds to the stack of view script paths in LIFO order.
+     *
+     * @param string|array The directory (-ies) to add.
+     * @return Zend_View_Abstract
+     */
+    public function addScriptPath($path)
+    {
+        $this->_addPath('script', $path);
+        return $this;
+    }
+
+    /**
+     * Resets the stack of view script paths.
+     *
+     * To clear all paths, use Zend_View::setScriptPath(null).
+     *
+     * @param string|array The directory (-ies) to set as the path.
+     * @return Zend_View_Abstract
+     */
+    public function setScriptPath($path)
+    {
+        $this->_path['script'] = array();
+        $this->_addPath('script', $path);
+        return $this;
+    }
+
+    /**
+     * Return full path to a view script specified by $name
+     *
+     * @param  string $name
+     * @return false|string False if script not found
+     * @throws Zend_View_Exception if no script directory set
+     */
+    public function getScriptPath($name)
+    {
+        try {
+            $path = $this->_script($name);
+            return $path;
+        } catch (Zend_View_Exception $e) {
+            if (strstr($e->getMessage(), 'no view script directory set')) {
+                throw $e;
+            }
+
+            return false;
+        }
+    }
+
+    /**
+     * Returns an array of all currently set script paths
+     *
+     * @return array
+     */
+    public function getScriptPaths()
+    {
+        return $this->_getPaths('script');
+    }
+
+    /**
+     * Set plugin loader for a particular plugin type
+     *
+     * @param  Zend_Loader_PluginLoader $loader
+     * @param  string $type
+     * @return Zend_View_Abstract
+     */
+    public function setPluginLoader(Zend_Loader_PluginLoader $loader, $type)
+    {
+        $type = strtolower($type);
+        if (!in_array($type, $this->_loaderTypes)) {
+            $e = new Zend_View_Exception(sprintf('Invalid plugin loader type "%s"', $type));
+            $e->setView($this);
+            throw $e;
+        }
+
+        $this->_loaders[$type] = $loader;
+        return $this;
+    }
+
+    /**
+     * Retrieve plugin loader for a specific plugin type
+     *
+     * @param  string $type
+     * @return Zend_Loader_PluginLoader
+     */
+    public function getPluginLoader($type)
+    {
+        $type = strtolower($type);
+        if (!in_array($type, $this->_loaderTypes)) {
+            $e = new Zend_View_Exception(sprintf('Invalid plugin loader type "%s"; cannot retrieve', $type));
+            $e->setView($this);
+            throw $e;
+        }
+
+        if (!array_key_exists($type, $this->_loaders)) {
+            $prefix     = 'Zend_View_';
+            $pathPrefix = 'Zend/View/';
+
+            $pType = ucfirst($type);
+            switch ($type) {
+                case 'filter':
+                case 'helper':
+                default:
+                    $prefix     .= $pType;
+                    $pathPrefix .= $pType;
+                    $loader = new Zend_Loader_PluginLoader(array(
+                        $prefix => $pathPrefix
+                    ));
+                    $this->_loaders[$type] = $loader;
+                    break;
+            }
+        }
+        return $this->_loaders[$type];
+    }
+
+    /**
+     * Adds to the stack of helper paths in LIFO order.
+     *
+     * @param string|array The directory (-ies) to add.
+     * @param string $classPrefix Class prefix to use with classes in this
+     * directory; defaults to Zend_View_Helper
+     * @return Zend_View_Abstract
+     */
+    public function addHelperPath($path, $classPrefix = 'Zend_View_Helper_')
+    {
+        return $this->_addPluginPath('helper', $classPrefix, (array) $path);
+    }
+
+    /**
+     * Resets the stack of helper paths.
+     *
+     * To clear all paths, use Zend_View::setHelperPath(null).
+     *
+     * @param string|array $path The directory (-ies) to set as the path.
+     * @param string $classPrefix The class prefix to apply to all elements in
+     * $path; defaults to Zend_View_Helper
+     * @return Zend_View_Abstract
+     */
+    public function setHelperPath($path, $classPrefix = 'Zend_View_Helper_')
+    {
+        unset($this->_loaders['helper']);
+        return $this->addHelperPath($path, $classPrefix);
+    }
+
+    /**
+     * Get full path to a helper class file specified by $name
+     *
+     * @param  string $name
+     * @return string|false False on failure, path on success
+     */
+    public function getHelperPath($name)
+    {
+        return $this->_getPluginPath('helper', $name);
+    }
+
+    /**
+     * Returns an array of all currently set helper paths
+     *
+     * @return array
+     */
+    public function getHelperPaths()
+    {
+        return $this->getPluginLoader('helper')->getPaths();
+    }
+
+    /**
+     * Registers a helper object, bypassing plugin loader
+     *
+     * @param  Zend_View_Helper_Abstract|object $helper
+     * @param  string $name
+     * @return Zend_View_Abstract
+     * @throws Zend_View_Exception
+     */
+    public function registerHelper($helper, $name)
+    {
+        if (!is_object($helper)) {
+            $e = new Zend_View_Exception('View helper must be an object');
+            $e->setView($this);
+            throw $e;
+        }
+
+        if (!$helper instanceof Zend_View_Interface) {
+            if (!method_exists($helper, $name)) {
+                $e =  new Zend_View_Exception(
+                    'View helper must implement Zend_View_Interface or have a method matching the name provided'
+                );
+                $e->setView($this);
+                throw $e;
+            }
+        }
+
+        if (method_exists($helper, 'setView')) {
+            $helper->setView($this);
+        }
+
+        $name = ucfirst($name);
+        $this->_helper[$name] = $helper;
+        return $this;
+    }
+
+    /**
+     * Get a helper by name
+     *
+     * @param  string $name
+     * @return object
+     */
+    public function getHelper($name)
+    {
+        return $this->_getPlugin('helper', $name);
+    }
+
+    /**
+     * Get array of all active helpers
+     *
+     * Only returns those that have already been instantiated.
+     *
+     * @return array
+     */
+    public function getHelpers()
+    {
+        return $this->_helper;
+    }
+
+    /**
+     * Adds to the stack of filter paths in LIFO order.
+     *
+     * @param string|array The directory (-ies) to add.
+     * @param string $classPrefix Class prefix to use with classes in this
+     * directory; defaults to Zend_View_Filter
+     * @return Zend_View_Abstract
+     */
+    public function addFilterPath($path, $classPrefix = 'Zend_View_Filter_')
+    {
+        return $this->_addPluginPath('filter', $classPrefix, (array) $path);
+    }
+
+    /**
+     * Resets the stack of filter paths.
+     *
+     * To clear all paths, use Zend_View::setFilterPath(null).
+     *
+     * @param string|array The directory (-ies) to set as the path.
+     * @param string $classPrefix The class prefix to apply to all elements in
+     * $path; defaults to Zend_View_Filter
+     * @return Zend_View_Abstract
+     */
+    public function setFilterPath($path, $classPrefix = 'Zend_View_Filter_')
+    {
+        unset($this->_loaders['filter']);
+        return $this->addFilterPath($path, $classPrefix);
+    }
+
+    /**
+     * Get full path to a filter class file specified by $name
+     *
+     * @param  string $name
+     * @return string|false False on failure, path on success
+     */
+    public function getFilterPath($name)
+    {
+        return $this->_getPluginPath('filter', $name);
+    }
+
+    /**
+     * Get a filter object by name
+     *
+     * @param  string $name
+     * @return object
+     */
+    public function getFilter($name)
+    {
+        return $this->_getPlugin('filter', $name);
+    }
+
+    /**
+     * Return array of all currently active filters
+     *
+     * Only returns those that have already been instantiated.
+     *
+     * @return array
+     */
+    public function getFilters()
+    {
+        return $this->_filter;
+    }
+
+    /**
+     * Returns an array of all currently set filter paths
+     *
+     * @return array
+     */
+    public function getFilterPaths()
+    {
+        return $this->getPluginLoader('filter')->getPaths();
+    }
+
+    /**
+     * Return associative array of path types => paths
+     *
+     * @return array
+     */
+    public function getAllPaths()
+    {
+        $paths = $this->_path;
+        $paths['helper'] = $this->getHelperPaths();
+        $paths['filter'] = $this->getFilterPaths();
+        return $paths;
+    }
+
+    /**
+     * Add one or more filters to the stack in FIFO order.
+     *
+     * @param string|array One or more filters to add.
+     * @return Zend_View_Abstract
+     */
+    public function addFilter($name)
+    {
+        foreach ((array) $name as $val) {
+            $this->_filter[] = $val;
+        }
+        return $this;
+    }
+
+    /**
+     * Resets the filter stack.
+     *
+     * To clear all filters, use Zend_View::setFilter(null).
+     *
+     * @param string|array One or more filters to set.
+     * @return Zend_View_Abstract
+     */
+    public function setFilter($name)
+    {
+        $this->_filter = array();
+        $this->addFilter($name);
+        return $this;
+    }
+
+    /**
+     * Sets the _escape() callback.
+     *
+     * @param mixed $spec The callback for _escape() to use.
+     * @return Zend_View_Abstract
+     */
+    public function setEscape($spec)
+    {
+        $this->_escape = $spec;
+        return $this;
+    }
+
+    /**
+     * Set LFI protection flag
+     *
+     * @param  bool $flag
+     * @return Zend_View_Abstract
+     */
+    public function setLfiProtection($flag)
+    {
+        $this->_lfiProtectionOn = (bool) $flag;
+        return $this;
+    }
+
+    /**
+     * Return status of LFI protection flag
+     *
+     * @return bool
+     */
+    public function isLfiProtectionOn()
+    {
+        return $this->_lfiProtectionOn;
+    }
+
+    /**
+     * Assigns variables to the view script via differing strategies.
+     *
+     * Zend_View::assign('name', $value) assigns a variable called 'name'
+     * with the corresponding $value.
+     *
+     * Zend_View::assign($array) assigns the array keys as variable
+     * names (with the corresponding array values).
+     *
+     * @see    __set()
+     * @param  string|array The assignment strategy to use.
+     * @param  mixed (Optional) If assigning a named variable, use this
+     * as the value.
+     * @return Zend_View_Abstract Fluent interface
+     * @throws Zend_View_Exception if $spec is neither a string nor an array,
+     * or if an attempt to set a private or protected member is detected
+     */
+    public function assign($spec, $value = null)
+    {
+        // which strategy to use?
+        if (is_string($spec)) {
+            // assign by name and value
+            if ('_' == substr($spec, 0, 1)) {
+                $e = new Zend_View_Exception('Setting private or protected class members is not allowed');
+                $e->setView($this);
+                throw $e;
+            }
+            $this->$spec = $value;
+        } elseif (is_array($spec)) {
+            // assign from associative array
+            $error = false;
+            foreach ($spec as $key => $val) {
+                if ('_' == substr($key, 0, 1)) {
+                    $error = true;
+                    break;
+                }
+                $this->$key = $val;
+            }
+            if ($error) {
+                $e = new Zend_View_Exception('Setting private or protected class members is not allowed');
+                $e->setView($this);
+                throw $e;
+            }
+        } else {
+            $e = new Zend_View_Exception('assign() expects a string or array, received ' . gettype($spec));
+            $e->setView($this);
+            throw $e;
+        }
+
+        return $this;
+    }
+
+    /**
+     * Return list of all assigned variables
+     *
+     * Returns all public properties of the object. Reflection is not used
+     * here as testing reflection properties for visibility is buggy.
+     *
+     * @return array
+     */
+    public function getVars()
+    {
+        $vars   = get_object_vars($this);
+        foreach ($vars as $key => $value) {
+            if ('_' == substr($key, 0, 1)) {
+                unset($vars[$key]);
+            }
+        }
+
+        return $vars;
+    }
+
+    /**
+     * Clear all assigned variables
+     *
+     * Clears all variables assigned to Zend_View either via {@link assign()} or
+     * property overloading ({@link __set()}).
+     *
+     * @return void
+     */
+    public function clearVars()
+    {
+        $vars   = get_object_vars($this);
+        foreach ($vars as $key => $value) {
+            if ('_' != substr($key, 0, 1)) {
+                unset($this->$key);
+            }
+        }
+    }
+
+    /**
+     * Processes a view script and returns the output.
+     *
+     * @param string $name The script name to process.
+     * @return string The script output.
+     */
+    public function render($name)
+    {
+        // find the script file name using the parent private method
+        $this->_file = $this->_script($name);
+        unset($name); // remove $name from local scope
+
+        ob_start();
+        $this->_run($this->_file);
+
+        return $this->_filter(ob_get_clean()); // filter output
+    }
+
+    /**
+     * Escapes a value for output in a view script.
+     *
+     * If escaping mechanism is one of htmlspecialchars or htmlentities, uses
+     * {@link $_encoding} setting.
+     *
+     * @param mixed $var The output to escape.
+     * @return mixed The escaped value.
+     */
+    public function escape($var)
+    {
+        if (in_array($this->_escape, array('htmlspecialchars', 'htmlentities'))) {
+            return call_user_func($this->_escape, $var, ENT_COMPAT, $this->_encoding);
+        }
+
+        if (1 == func_num_args()) {
+            return call_user_func($this->_escape, $var);
+        }
+        $args = func_get_args();
+        return call_user_func_array($this->_escape, $args);
+    }
+
+    /**
+     * Set encoding to use with htmlentities() and htmlspecialchars()
+     *
+     * @param string $encoding
+     * @return Zend_View_Abstract
+     */
+    public function setEncoding($encoding)
+    {
+        $this->_encoding = $encoding;
+        return $this;
+    }
+
+    /**
+     * Return current escape encoding
+     *
+     * @return string
+     */
+    public function getEncoding()
+    {
+        return $this->_encoding;
+    }
+
+    /**
+     * Enable or disable strict vars
+     *
+     * If strict variables are enabled, {@link __get()} will raise a notice
+     * when a variable is not defined.
+     *
+     * Use in conjunction with {@link Zend_View_Helper_DeclareVars the declareVars() helper}
+     * to enforce strict variable handling in your view scripts.
+     *
+     * @param  boolean $flag
+     * @return Zend_View_Abstract
+     */
+    public function strictVars($flag = true)
+    {
+        $this->_strictVars = ($flag) ? true : false;
+
+        return $this;
+    }
+
+    /**
+     * Finds a view script from the available directories.
+     *
+     * @param string $name The base name of the script.
+     * @return void
+     */
+    protected function _script($name)
+    {
+        if ($this->isLfiProtectionOn() && preg_match('#\.\.[\\\/]#', $name)) {
+            $e = new Zend_View_Exception('Requested scripts may not include parent directory traversal ("../", "..\\" notation)');
+            $e->setView($this);
+            throw $e;
+        }
+
+        if (0 == count($this->_path['script'])) {
+            $e = new Zend_View_Exception('no view script directory set; unable to determine location for view script');
+            $e->setView($this);
+            throw $e;
+        }
+
+        foreach ($this->_path['script'] as $dir) {
+            if (is_readable($dir . $name)) {
+                return $dir . $name;
+            }
+        }
+
+        $message = "script '$name' not found in path ("
+                 . implode(PATH_SEPARATOR, $this->_path['script'])
+                 . ")";
+        $e = new Zend_View_Exception($message);
+        $e->setView($this);
+        throw $e;
+    }
+
+    /**
+     * Applies the filter callback to a buffer.
+     *
+     * @param string $buffer The buffer contents.
+     * @return string The filtered buffer.
+     */
+    private function _filter($buffer)
+    {
+        // loop through each filter class
+        foreach ($this->_filter as $name) {
+            // load and apply the filter class
+            $filter = $this->getFilter($name);
+            $buffer = call_user_func(array($filter, 'filter'), $buffer);
+        }
+
+        // done!
+        return $buffer;
+    }
+
+    /**
+     * Adds paths to the path stack in LIFO order.
+     *
+     * Zend_View::_addPath($type, 'dirname') adds one directory
+     * to the path stack.
+     *
+     * Zend_View::_addPath($type, $array) adds one directory for
+     * each array element value.
+     *
+     * In the case of filter and helper paths, $prefix should be used to
+     * specify what class prefix to use with the given path.
+     *
+     * @param string $type The path type ('script', 'helper', or 'filter').
+     * @param string|array $path The path specification.
+     * @param string $prefix Class prefix to use with path (helpers and filters
+     * only)
+     * @return void
+     */
+    private function _addPath($type, $path, $prefix = null)
+    {
+        foreach ((array) $path as $dir) {
+            // attempt to strip any possible separator and
+            // append the system directory separator
+            $dir  = rtrim($dir, '/');
+            $dir  = rtrim($dir, '\\');
+            $dir .= '/';
+
+            switch ($type) {
+                case 'script':
+                    // add to the top of the stack.
+                    array_unshift($this->_path[$type], $dir);
+                    break;
+                case 'filter':
+                case 'helper':
+                default:
+                    // add as array with prefix and dir keys
+                    array_unshift($this->_path[$type], array('prefix' => $prefix, 'dir' => $dir));
+                    break;
+            }
+        }
+    }
+
+    /**
+     * Resets the path stack for helpers and filters.
+     *
+     * @param string $type The path type ('helper' or 'filter').
+     * @param string|array $path The directory (-ies) to set as the path.
+     * @param string $classPrefix Class prefix to apply to elements of $path
+     */
+    private function _setPath($type, $path, $classPrefix = null)
+    {
+        $dir = DIRECTORY_SEPARATOR . ucfirst($type) . DIRECTORY_SEPARATOR;
+
+        switch ($type) {
+            case 'script':
+                $this->_path[$type] = array(dirname(__FILE__) . $dir);
+                $this->_addPath($type, $path);
+                break;
+            case 'filter':
+            case 'helper':
+            default:
+                $this->_path[$type] = array(array(
+                    'prefix' => 'Zend_View_' . ucfirst($type) . '_',
+                    'dir'    => dirname(__FILE__) . $dir
+                ));
+                $this->_addPath($type, $path, $classPrefix);
+                break;
+        }
+    }
+
+    /**
+     * Return all paths for a given path type
+     *
+     * @param string $type The path type  ('helper', 'filter', 'script')
+     * @return array
+     */
+    private function _getPaths($type)
+    {
+        return $this->_path[$type];
+    }
+
+    /**
+     * Register helper class as loaded
+     *
+     * @param  string $name
+     * @param  string $class
+     * @param  string $file path to class file
+     * @return void
+     */
+    private function _setHelperClass($name, $class, $file)
+    {
+        $this->_helperLoadedDir[$name] = $file;
+        $this->_helperLoaded[$name]    = $class;
+    }
+
+    /**
+     * Register filter class as loaded
+     *
+     * @param  string $name
+     * @param  string $class
+     * @param  string $file path to class file
+     * @return void
+     */
+    private function _setFilterClass($name, $class, $file)
+    {
+        $this->_filterLoadedDir[$name] = $file;
+        $this->_filterLoaded[$name]    = $class;
+    }
+
+    /**
+     * Add a prefixPath for a plugin type
+     *
+     * @param  string $type
+     * @param  string $classPrefix
+     * @param  array $paths
+     * @return Zend_View_Abstract
+     */
+    private function _addPluginPath($type, $classPrefix, array $paths)
+    {
+        $loader = $this->getPluginLoader($type);
+        foreach ($paths as $path) {
+            $loader->addPrefixPath($classPrefix, $path);
+        }
+        return $this;
+    }
+
+    /**
+     * Get a path to a given plugin class of a given type
+     *
+     * @param  string $type
+     * @param  string $name
+     * @return string|false
+     */
+    private function _getPluginPath($type, $name)
+    {
+        $loader = $this->getPluginLoader($type);
+        if ($loader->isLoaded($name)) {
+            return $loader->getClassPath($name);
+        }
+
+        try {
+            $loader->load($name);
+            return $loader->getClassPath($name);
+        } catch (Zend_Loader_Exception $e) {
+            return false;
+        }
+    }
+
+    /**
+     * Retrieve a plugin object
+     *
+     * @param  string $type
+     * @param  string $name
+     * @return object
+     */
+    private function _getPlugin($type, $name)
+    {
+        $name = ucfirst($name);
+        switch ($type) {
+            case 'filter':
+                $storeVar = '_filterClass';
+                $store    = $this->_filterClass;
+                break;
+            case 'helper':
+                $storeVar = '_helper';
+                $store    = $this->_helper;
+                break;
+        }
+
+        if (!isset($store[$name])) {
+            $class = $this->getPluginLoader($type)->load($name);
+            $store[$name] = new $class();
+            if (method_exists($store[$name], 'setView')) {
+                $store[$name]->setView($this);
+            }
+        }
+
+        $this->$storeVar = $store;
+        return $store[$name];
+    }
+
+    /**
+     * Use to include the view script in a scope that only allows public
+     * members.
+     *
+     * @return mixed
+     */
+    abstract protected function _run();
+}