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-rw-r--r--share/extensions/docs/Makefile20
-rw-r--r--share/extensions/docs/_templates/versions.html27
-rw-r--r--share/extensions/docs/authors/index.rst29
-rw-r--r--share/extensions/docs/authors/interpreters.rst114
-rw-r--r--share/extensions/docs/authors/inx-overview.rst238
-rw-r--r--share/extensions/docs/authors/inx-widgets.rst536
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-rw-r--r--share/extensions/docs/authors/samples/unit_camera.svg730
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-rw-r--r--share/extensions/docs/authors/submit.rst97
-rw-r--r--share/extensions/docs/authors/unit-tests.rst67
-rw-r--r--share/extensions/docs/authors/units.rst316
-rw-r--r--share/extensions/docs/authors/update1.0.rst301
-rw-r--r--share/extensions/docs/authors/update1.2.rst229
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-rw-r--r--share/extensions/docs/conf.py93
-rw-r--r--share/extensions/docs/dev/getting-started.rst148
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-rw-r--r--share/extensions/docs/source/index.rst21
-rw-r--r--share/extensions/docs/tutorial/index.rst49
-rw-r--r--share/extensions/docs/tutorial/my-first-effect-extension.rst130
-rw-r--r--share/extensions/docs/tutorial/my-first-import-extension.rst305
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diff --git a/share/extensions/docs/Makefile b/share/extensions/docs/Makefile
new file mode 100644
index 0000000..43276bb
--- /dev/null
+++ b/share/extensions/docs/Makefile
@@ -0,0 +1,20 @@
+# Minimal makefile for Sphinx documentation
+#
+
+# You can set these variables from the command line, and also
+# from the environment for the first two.
+SPHINXOPTS ?=
+SPHINXBUILD ?= sphinx-build
+SOURCEDIR = .
+BUILDDIR = ../build
+
+# Put it first so that "make" without argument is like "make help".
+help:
+ @$(SPHINXBUILD) -M help "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
+
+.PHONY: help Makefile
+
+# Catch-all target: route all unknown targets to Sphinx using the new
+# "make mode" option. $(O) is meant as a shortcut for $(SPHINXOPTS).
+%: Makefile
+ @$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
diff --git a/share/extensions/docs/_templates/versions.html b/share/extensions/docs/_templates/versions.html
new file mode 100644
index 0000000..476c8d1
--- /dev/null
+++ b/share/extensions/docs/_templates/versions.html
@@ -0,0 +1,27 @@
+{%- if current_version %}
+<div class="rst-versions" data-toggle="rst-versions" role="note" aria-label="versions">
+ <span class="rst-current-version" data-toggle="rst-current-version">
+ <span class="fa fa-book"> Other Versions</span>
+ v: {{ current_version.name }}
+ <span class="fa fa-caret-down"></span>
+ </span>
+ <div class="rst-other-versions">
+ {%- if versions.tags %}
+ <dl>
+ <dt>Tags</dt>
+ {%- for item in versions.tags %}
+ <dd><a href="{{ item.url }}">{{ item.name }}</a></dd>
+ {%- endfor %}
+ </dl>
+ {%- endif %}
+ {%- if versions.branches %}
+ <dl>
+ <dt>Branches</dt>
+ {%- for item in versions.branches %}
+ <dd><a href="{{ item.url }}">{{ item.name }}</a></dd>
+ {%- endfor %}
+ </dl>
+ {%- endif %}
+ </div>
+</div>
+{%- endif %} \ No newline at end of file
diff --git a/share/extensions/docs/authors/index.rst b/share/extensions/docs/authors/index.rst
new file mode 100644
index 0000000..8e7b967
--- /dev/null
+++ b/share/extensions/docs/authors/index.rst
@@ -0,0 +1,29 @@
+Writing Extensions: In-Depth
+============================
+
+.. toctree::
+ :maxdepth: 2
+
+ inx-overview
+ inx-widgets
+ interpreters
+ unit-tests
+ submit
+
+Highlevel explanation of specific inkex features
+----------------------------------------------------
+
+.. toctree::
+ :maxdepth: 2
+
+ units
+
+Update guides
+-------------
+
+.. toctree::
+ :maxdepth: 2
+
+ update1.0
+ update1.2
+ \ No newline at end of file
diff --git a/share/extensions/docs/authors/interpreters.rst b/share/extensions/docs/authors/interpreters.rst
new file mode 100644
index 0000000..254abd6
--- /dev/null
+++ b/share/extensions/docs/authors/interpreters.rst
@@ -0,0 +1,114 @@
+.. _supported_interpreters:
+
+Supported Interpreters
+======================
+
+Inkscape Script extensions can use one of the following interpreters:
+
++----------+------------------+----------------------+------------------+
+| Language | Name (in INX | Name (in | Default value |
+| | file) | preferences.xml) | |
++==========+==================+======================+==================+
+| Perl | "perl" | "perl-interpreter" | "perl" |
+| | | | |
+| | | | "wperl" (Windows;|
+| | | | since Inkscape |
+| | | | 1.0) |
++----------+------------------+----------------------+------------------+
+| Python | "python" | "python-interpreter" | "python" |
+| | | | |
+| | | | "pythonw" |
+| | | | (Windows) |
++----------+------------------+----------------------+------------------+
+| Ruby | "ruby" | "ruby-interpreter" | "ruby" |
++----------+------------------+----------------------+------------------+
+| Shell | "shell" | "shell-interpreter" | "sh" |
++----------+------------------+----------------------+------------------+
+
+(Code reference: `src/extension/implementation/script.cpp`_)
+
+.. _src/extension/implementation/script.cpp: https://gitlab.com/inkscape/inkscape/-/blob/master/src/extension/implementation/script.cpp
+
+.. _inx_files:
+
+INX files
+---------
+
+Within the INX file, you need to indicate the interpreter which will be
+used to execute the script, using the name given in the table above:
+
+Example:
+
+::
+
+ <inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
+ ...
+ <script>
+ <command reldir="extensions" interpreter="python">my_extension.py</command>
+ </script>
+ </inkscape-extension>
+
+.. _selecting_a_specific_interpreter_version_via_preferences_file:
+
+Selecting a specific interpreter version (via preferences file)
+---------------------------------------------------------------
+
+In the preferences.xml file, a user can set a specific executable of the
+interpreter that Inkscape should use to execute extensions of a specific
+type.
+
+This is especially useful, if the system's default version of the
+interpreter is incompatible with the one used by Inkscape's extension
+subsystem (e.g. Inkscape extensions that rely on inkex.py will only work
+with Python 2 (as of Inkscape 0.92.1), while on some recent Linux
+distributions, the default Python version used is Python 3, which
+results in errors during execution of extensions).
+
+To change the executable that will be used to run script extensions to a
+different value than the default value in the above table, you need to
+do the following:
+
+#. quit all running Inkscape processes
+#. Open your perferences.xml file with a text editor (find the exact
+ location of the file by going to Edit -> Preferences -> System: User
+ Preferences)
+#. search the group which holds settings for the extension system itself
+ and options of various extensions:
+ ::
+
+ <group
+ id="extensions"
+ …
+ org.ekips.filter.gears.teeth="24"
+ org.ekips.filter.gears.pitch="20"
+ org.ekips.filter.gears.angle="20" />
+
+#. Insert a key for the interpreter, for example 'python-interpreter'
+ for setting the program that should be used to run python extensions,
+ and set the string to the absolute path to the python binary which is
+ compatible with Inkscape's current extension scripts (in the example
+ below, the path is "/usr/bin/python2.7". It will look different on
+ Windows systems.):
+ ::
+
+ <group
+ id="extensions"
+ python-interpreter="/usr/bin/python2.7"
+ …
+ org.ekips.filter.gears.teeth="24"
+ org.ekips.filter.gears.pitch="20"
+ org.ekips.filter.gears.angle="20" />
+
+#. Save the preferences file, and launch Inkscape to test the
+ extensions.
+
+.. _see_also:
+
+See Also
+--------
+
+- `INX Parameters <INX_Parameters>`__
+- `ScriptingHOWTO <ScriptingHOWTO>`__
+
+`Category:Developer Documentation <Category:Developer_Documentation>`__
+`Category:Extensions <Category:Extensions>`__
diff --git a/share/extensions/docs/authors/inx-overview.rst b/share/extensions/docs/authors/inx-overview.rst
new file mode 100644
index 0000000..83843d4
--- /dev/null
+++ b/share/extensions/docs/authors/inx-overview.rst
@@ -0,0 +1,238 @@
+INX extension descriptor format
+===============================
+
+
+.. highlight:: xml
+
+Introduction
+------------
+
+In order for Inkscape to make use of an external script or program, you
+must describe that script to inkscape using an INX file. The INX file is
+an XML file with Inkscape-specific content that can be edited in a
+plain-text editor.
+
+The INX file allows the author to:
+
+- Specify what type of extension it is, for example input, output, or
+ effect
+- Identify :ref:`which interpreter <supported_interpreters>` should be used to run the extension
+- List dependencies; files or other extensions required for operation
+- Define parameters that can be set in the extension
+- Create :ref:`a GUI with control widgets <inx-widgets>` for those parameters
+- Add a submenu to the Extensions menu for the extension to reside in
+- Label strings for translation
+- Chain extensions
+- Etc
+
+Nothing beats a working example, and Inkscape includes a great number of
+extensions with INX files that you can read. To find the location of
+your Inkscape extensions directory, where included extensions and their
+INX files are located, look in the System pane of Inkscape Preferences,
+under "Inkscape extensions".
+
+.. _translation_of_extensions:
+
+Translation of extensions
+-------------------------
+
+Extension dialog windows, described in INX files, can be prepared for
+translation or localisation by adding an ``_`` (underscore) to the XML
+tags or attributes. Only add underscores when text needs to be
+translated (not numeric values, for example!).
+
+Example::
+
+ <_name>Some translatable extension name</_name>
+
+Or::
+
+ <param name="..." type="..." _gui-text="Some translatable label text">
+
+When extensions are included in the `Inkscape Extensions Repository`_,
+various scripts will scan each INX file for translatable text and
+prepare `translation files`_ for others to translate.
+
+See also: `Ted's blog`_.
+
+.. _attributes_description:
+
+Attributes description
+----------------------
+
++---------------------------+-------------------------+
+| Attribute name | Allowed values |
++===========================+=========================+
+| ``implements-custom-gui`` | ``"true"`` | |
+| | ``"false"`` (default) |
+| .. versionadded:: 1.0 | |
++---------------------------+-------------------------+
+| If set to ``true`` **requires** an effect |
+| extension to implement custom GUI. |
+| |
+| .. hint:: |
+| *Implementation detail:* The "extension is |
+| working" window is not shown for this kind of |
+| extensions. This means user interaction with the |
+| Inkscape interface is blocked until the |
+| extension returns, with no way for the user to |
+| abort the running extension! It is therefore |
+| **absolutely essential** that your extension |
+| provides the necessary visual feedback for the |
+| user and has proper error handling, to rule out |
+| any dead-locking behavior. |
++---------------------------+-------------------------+
+| ``needs-document`` | ``"true"`` (default) | |
+| | ``"false"`` |
+| .. versionadded:: 1.0 | |
++---------------------------+-------------------------+
+| If set to ``false`` an effect extension will not be |
+| passed a document nor will a document be read back |
+| ("no-op" effect). This is currently a hack to make |
+| extension manager work and will likely be |
+| removed/replaced in future, so use at your |
+| **own risk**! |
++---------------------------+-------------------------+
+| ``needs-live-preview`` | ``"true"`` (default) |
+| | ``"false"`` |
++---------------------------+-------------------------+
+| If set to ``true`` in an effect extension, it will |
+| offer a "Live preview" checkbox in its GUI. When |
+| the user checks that box, it will run the extension |
+| in a "preview mode", visually showing the effect of |
+| the extension, but not making any changes to the |
+| SVG document, unless the user clicks the Apply |
+| button. While "Live preview" is checked in the GUI, |
+| any changes that the user makes to parameters |
+| accessible in the GUI will generate an updated |
+| preview. |
++---------------------------+-------------------------+
+| ``savecopyonly`` | ``"true"`` | |
+| | ``"false"`` (default) |
+| .. versionadded:: 1.2 | |
++---------------------------+-------------------------+
+| If set to ``true`` in an **output** extension, it |
+| will limit the extension to being available only |
+| in the "Save a Copy" menu. |
++---------------------------+-------------------------+
+
+
+Example
+-------
+
+::
+
+ <?xml version="1.0" encoding="UTF-8"?>
+ <inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
+ <_name>{Friendly Extension Name}</_name>
+ <id>{org.domain.sub-domain.extension-name}</id>
+ <dependency type="executable" location="[extensions|path|plugins|{location}]">program.ext</dependency>
+ <param name="tab" type="notebook">
+ <page name="controls" _gui-text="Controls">
+ <param name="{argumentName}" type="[int|float|string|bool]" min="{number}" max="{number}"
+ _gui-text="{Friendly Argument Name}">{default value}</param>
+ </page>
+ <page name="help" _gui-text="Help">
+ <param name="help_text" type="description">{Friendly Extension Help}</param>
+ </page>
+ </param>
+ <effect>
+ <object-type>[all|{element type}]</object-type>
+ <effects-menu>
+ <submenu _name="{Extension Group Name}"/>
+ </effects-menu>
+ </effect>
+ <script>
+ <command reldir="extensions" interpreter="[python|perl|ruby|bash|{some other}]">program.ext</command>
+ </script>
+ </inkscape-extension>
+
+More example INX files are available in the Inkscape distribution, which
+takes its files from the `Inkscape Extensions Repository`_.
+
+For a full list of currently supported interpreters, please see
+:ref:`supported_interpreters`.
+
+.. _dtd_xml_schema:
+
+DTD XML schema
+--------------
+
+.. warning:: This section contains slightly outdated information.
+
+The following XML schema may not fully describe the current INX file
+structure. The actual XML schema used is described in the :ref:`next
+paragraph <relax_ng_xml_schema>`.
+
+::
+
+ <!ELEMENT inkscape-extension (name, id, dependency*, param*,(input|output|effect),(script|plugin))>
+ <!ELEMENT input (extension, mimetype, filetype, filetypetooltip, output_extension?)>
+ <!ELEMENT output (extension, mimetype, filetype, filetypetooltip, dataloss?)>
+ <!ELEMENT effect (object-type|submenu?)>
+ <!ELEMENT script (command, helper_extension*, check*)>
+ <!ELEMENT plugin (name)>
+ <!ELEMENT name (#PCDATA)>
+ <!ELEMENT id (#PCDATA)>
+ <!ELEMENT item (#PCDATA)>
+ <!ELEMENT option (#PCDATA)>
+ <!ELEMENT dependency (#PCDATA)>
+ <!ELEMENT param (#PCDATA|page|item|option)*>
+ <!ELEMENT page (#PCDATA, param*)>
+ <!ELEMENT extension (#PCDATA)>
+ <!ELEMENT mimetype (#PCDATA)>
+ <!ELEMENT filetype (#PCDATA)>
+ <!ELEMENT filetooltip (#PCDATA)>
+ <!ELEMENT object-type (#PCDATA)>
+ <!ELEMENT command (#PCDATA)>
+ <!ELEMENT check (#PCDATA)>
+ <!ELEMENT dataloss (#PCDATA)>
+ <!ELEMENT helper_extension (#PCDATA)>
+ <!ELEMENT output_extension (#PCDATA)>
+ <!ELEMENT menu-tip (#PCDATA)>
+
+ <!ATTLIST check reldir (absolute|path|extensions|plugins) #REQUIRED>
+ <!ATTLIST command reldir (absolute|path|extensions|plugins) #REQUIRED>
+ <!ATTLIST command interpreter CDATA #REQUIRED>
+ <!ATTLIST dependency type (executable|extension) #REQUIRED>
+ <!ATTLIST dependency location (absolute|path|extensions|plugins) #IMPLIED>
+ <!ATTLIST dependency description CDATA #IMPLIED>
+ <!ATTLIST effect needs-live-preview (true|false) #REQUIRED>
+ <!ATTLIST effect implements-custom-gui (true|false) #IMPLIED>
+ <!ATTLIST effect needs-document (true|false) #IMPLIED>
+ <!ATTLIST page name CDATA #REQUIRED>
+ <!ATTLIST page gui-text CDATA #IMPLIED>
+ <!ATTLIST param name CDATA #REQUIRED>
+ <!ATTLIST param type (int|float|string|bool|notebook|path|optiongroup|color) #REQUIRED>
+ <!ATTLIST param min CDATA #IMPLIED>
+ <!ATTLIST param max CDATA #IMPLIED>
+ <!ATTLIST param max_length CDATA #IMPLIED>
+ <!ATTLIST param precision CDATA #IMPLIED>
+ <!ATTLIST param gui-text CDATA #IMPLIED>
+ <!ATTLIST param gui-tip CDATA #IMPLIED>
+ <!ATTLIST param gui-description CDATA #IMPLIED>
+ <!ATTLIST param scope CDATA #IMPLIED>
+ <!ATTLIST param gui-hidden CDATA #IMPLIED>
+ <!ATTLIST param appearance (minimal|) "">
+ <!ATTLIST submenu name CDATA #REQUIRED>
+
+.. _relax_ng_xml_schema:
+
+RELAX NG XML schema
+-------------------
+
+The XML schema for INX files is available in the `Inkscape extensions
+Git repository`_. This is a `RELAX NG schema`_.
+
+.. _see_also:
+
+.. _next paragraph: INX_extension_descriptor_format#RELAX_NG_XML_schema
+.. _Inkscape extensions Git repository: https://gitlab.com/inkscape/extensions/-/blob/master/inkscape.extension.rng
+.. _RELAX NG schema: http://www.relaxng.org/
+.. _INX Parameters: Extensions:_INX_widgets_and_parameters
+.. _ScriptingHOWTO: ScriptingHOWTO
+
+.. _Inkscape Extensions Repository: https://gitlab.com/inkscape/extensions
+.. _a GUI with control widgets: Extensions:_INX_widgets_and_parameters
+.. _translation files: https://gitlab.com/inkscape/inkscape/-/tree/master/po
+.. _Ted's blog: http://gould.cx/ted/blog/Translating_Custom_XML \ No newline at end of file
diff --git a/share/extensions/docs/authors/inx-widgets.rst b/share/extensions/docs/authors/inx-widgets.rst
new file mode 100644
index 0000000..5c4e1d5
--- /dev/null
+++ b/share/extensions/docs/authors/inx-widgets.rst
@@ -0,0 +1,536 @@
+.. _inx-widgets:
+
+INX widgets and parameters
+==========================
+
+This page contains the reference documentation for INX widgets and
+parameters. Their primary goal is to make it easy to design GUIs for
+`Inkscape Extensions <Extension_subsystem>`__ using the built-in `INX
+extension descriptor format <INX_extension_descriptor_format>`__,
+although (invisible) parameters can also be used for extensions that
+don't need to show a user interface.
+
+Introduction
+------------
+
+Extension GUIs consists of an arbitrary number of GUI elements,
+so-called `Widgets <#Widgets>`__. These can be simple text labels, boxes
+and spacers to control layout or more complex UI elements like images.
+
+A special class of Widgets are `Parameters <#Parameters>`__. They differ
+from other Widgets in that they have a user-settable value, for example
+a boolean (implemented as checkbox) or integer (implemented as number
+entry). The value of each Parameter is passed to the extension on
+execution and can be used to control its behavior.
+
+All Widgets are described using an easy-to-learn XML schema with
+predefined tags and attributes which are described in detail below.
+
+.. _available_widgets:
+
+Available Widgets
+~~~~~~~~~~~~~~~~~
+
+A general Widget takes the form
+
+.. code::
+
+ <widget_name attribute1="value1" attribute2="value2" ...>value</widget_name>
+
+where ``widget_name`` specifies the name of the widget and is one of the
+following:
+
+- ``label``:sup:`since 1.0`\
+- ``hbox``:sup:`since 1.0`\ /``vbox``:sup:`since 1.0`\
+- ``separator``:sup:`since 1.0`\ /``spacer``:sup:`since 1.0`\
+- ``image``:sup:`since 1.0`\
+- ``param`` (for all Parameter types)
+
+.. _apt:
+
+Available Parameter types
+~~~~~~~~~~~~~~~~~~~~~~~~~
+
+A general Parameter takes the form
+
+.. code::
+
+ <param type="parameter_type" attribute1="value1" atribute2="value2" ...>value</param >
+
+where ``parameter_type`` specifies the type of the parameter and is one
+of the following:
+
+- ``bool``:sup:`since 1.0`\
+- ``int``
+- ``float``
+- ``string``
+- ``path``:sup:`since 1.0`\
+- ``optiongroup``
+- ``notebook``
+- ``color``
+
+If a parameter is made invisible (see ``gui-hidden`` attribute in the
+`next section <#common-attributes>`__) it will not be shown in the GUI
+but it's value is still passed to an extension. This is useful if you
+want to hardcode parameter value the user should not be able to change.
+If all parameters (and potential widgets) are invisible, Inkscape will
+not show a GUI and execute the extension immediately instead, but will
+still pass the values of the invisible parameters.
+
+.. _common_attributes:
+
+Common attributes
+-----------------
+
+For all widgets
+~~~~~~~~~~~~~~~
+
++------------------+------------------+------------------+------------------+
+| Attribute | Allowed | Default | Required? |
+| name | value(s) | value | |
++==================+==================+==================+==================+
+| ``gui-hidden`` | ``true``, | | |
+| | ``false`` | ``false`` | optional |
++------------------+------------------+------------------+------------------+
+| If set to ``true`` the Widget is hidden from the GUI (primarily used to |
+| add hidden parameters that are passed to the extension but are not |
+| supposed to be editable by the user.) |
+| |
+| *Note: If there are* **no** *visible parameters defined in a GUI, the |
+| extension is executed immediately without showing a dialog.* |
++------------------+------------------+------------------+------------------+
+| ``indent`` | ``0,1,2,…`` | ``0`` | optional |
++------------------+------------------+------------------+------------------+
+| Sets indentation level of the parameter. Increasing indentation adds |
+| padding to the start of the line. |
++------------------+------------------+------------------+------------------+
+
+
+
+Only for Parameters
+~~~~~~~~~~~~~~~~~~~
+
++------------------------+------------------------+------------------------+------------------------+
+| Attribute name | Allowed value(s) | Default value | Required? |
++========================+========================+========================+========================+
+| ``name`` | *(text)* | -- | required |
++------------------------+------------------------+------------------------+------------------------+
+| Used as an identifier of the parameter. It has to be unique since the value of this attribute is |
+| used to save and transmit parameter values internally! |
++------------------------+------------------------+------------------------+------------------------+
+| ``type`` | see `above <#apt>`__ | -- | required |
++------------------------+------------------------+------------------------+------------------------+
+| Determines the type of the parameter, see the extensive description of |
+| `Parameters <#parameters>`__ below. |
++------------------------+------------------------+------------------------+------------------------+
+| ``gui-text`` | *(text)* | -- | required *(visible |
+| | | | parameters)*, optional |
+| | | | *(hidden parameters* + |
+| | | | ``notebooks`` *)* |
++------------------------+------------------------+------------------------+------------------------+
+| Label shown for the parameter in the GUI. |
++------------------------+------------------------+------------------------+------------------------+
+| ``gui-description`` | *(text)* | -- | optional |
++------------------------+------------------------+------------------------+------------------------+
+| Tooltip shown for the parameter when the user hovers the mouse cursor over the active area of the |
+| parameter in question. |
++------------------------+------------------------+------------------------+------------------------+
+
+
+
+Widgets
+-------
+
+``hbox`` / ``vbox``
+~~~~~~~~~~~~~~~~~~~
+
+Creates a container for other widgets. No visual rendering but provides a possibility to align and
+layout other widgets. Child widgets are either added in horizontal (``hbox``) or vertical
+(``vbox``) direction.
+
+ .. code:: xml
+
+ <hbox>…</hbox>
+ <vbox>…</vbox>
+
+A box can contain an arbitrary number of other widgets and parameters (including other boxes) to
+fine-tune the layout of the GUI.
+
+*Note*: When you start with an empty extension GUI, you're basically starting with a ``vbox``.
+Also ``notebook`` pages behave like vertically oriented boxes.
+
+.. figure:: widgets/separator.png
+ :alt: Rendering of hbox/vbox
+
+ ``hbox`` and ``vbox``
+
+``image``
+~~~~~~~~~
+
+Creates a widget displaying an image. The content of the node specifies
+the path of the image file (ideally specify a path relative to the .inx
+file itself).
+
+.. code:: xml
+
+ <image>path/to/image.svg</image>
+
+By default the image will be rendered at it's actual size. Use
+attributes ``width/heigth`` to override the default size (in this case
+*both* attributes need to be supplied; units are pixels).
+
+Images are aligned in the horizontal center of the current box; different alignment
+can be realized by wrapping the image in a `hbox <#hbox-vbox>`__ and adding a
+`spacer <#spacer>`__ with ``size=expand``
+before (for right alignment) or after (for left alignment) of the image.
+
+*Implementation note: Loadable image formats are determined by GdkPixbuf
+and therefore system-specific. PNG should always work and is the safe
+choice. SVG should mostly work and is the preferred choice for obvious
+reasons.*
+
+.. figure:: widgets/image.png
+ :alt: Rendering of image
+
+ An ``image``
+
+``label``
+~~~~~~~~~
+
+Creates a widget showing text. The content of the node corresponds to
+the text content that will be rendered.
+
+.. code:: xml
+
+ <label>Some text here.</label>
+
+*Note: Labels are intended to provide additional information / help. For
+labeling parameters use the ``gui-text`` attribute; for short help texts
+that are specific to a single parameter prefer ``gui-description`` which
+will render as a tooltip.*
+
+- When setting the attribute ``appearance="header"`` the text is styled
+ as a heading and can be used as another possibility to group
+ parameters.
+- | When setting the attribute ``appearance="url"`` the text is rendered
+ as a clickable link.
+ | *Note: The text is escaped and used as the link target as-is.
+ Creating a link text that differs from the URL is prevented for
+ security reasons.*
+- When setting the attribute ``xml:space="preserve"`` any white-space
+ (spaces, tabs, line-breaks, etc.) in the label will be preserved,
+ allowing to format the label accordingly. By default all
+ leading/tailing and intermediary whitespace is collapsed into a
+ single space character.
+
+.. figure:: widgets/label.png
+ :alt: Rendering of different labels
+
+ Different label types (in order): default | ``appearance="header"`` |
+ ``appearance="url"`` | ``xml:space="preserve"``
+
+``separator``
+~~~~~~~~~~~~~
+
+Creates a separator for visual separation of other widgets. Renders as a
+horizontal/vertical line.
+
+.. code:: xml
+
+ <separator />
+
+The direction of the separator will automatically adjust depending on
+direction of the current container (vertical for "empty" extension GUIs
+and ``notebook`` pages; vertical/horizontal for ``vbox`` and ``hbox``
+respectively).
+
+.. figure:: widgets/separator.png
+ :alt: Rendering of separators
+
+ Separators can be used in `hbox` and `vbox` environments.
+
+``spacer``
+~~~~~~~~~~
+
+Creates a spacer for visual separation of other widgets. No visual
+rendering but provides variable spacing.
+
+.. code:: xml
+
+ <spacer />
+
+The direction of the spacer will automatically adjust depending on
+direction of the current container (vertical for "empty" extension GUIs
+and ``notebook`` pages; vertical/horizontal for ``vbox`` and ``hbox``
+respectively).
+
+Use the ``size`` attribute to set the spacing in pixels (default:
+``size="10"``). The special value ``expand`` results in a spacer that
+grows dynamically and always uses up as much space as possible (useful
+for aligning content).
+
+.. figure:: widgets/spacer.png
+ :alt: Rendering of spacers
+
+ Different spacer types: (1) default, (2) ``size="30"``, (3) ``size="expand"``
+
+Parameters
+----------
+
+``bool``
+~~~~~~~~
+
+.. versionadded:: 1.0
+
+Creates a checkbox to set a **boolean value**. Allowed values are
+``true`` or ``false`` (default value: ``true``).
+
+.. code:: xml
+
+ <param name="name" type="boolean" gui-text="Some label text">false</param>
+
+.. figure:: widgets/bool.png
+ :alt: Checkbox
+
+ Rendering of ``boolean`` values
+
+
+``color``
+~~~~~~~~~
+
+Creates a control to select an **RGBA color value**. Values should be
+given in hexadecimal notation, e.g. ``0xff0000ff`` for red with full
+opacity (default value: ``0x000000ff``)
+
+.. code:: xml
+
+ <param name="name" type="color" gui-text="Some label text">0x000000ff</param>
+
+Use ``appearance="colorbutton"`` for a simple button that opens a
+simplified color picker. Otherwise a full ColorNotebook will be
+rendered.
+
+.. figure:: widgets/color.png
+ :alt: Rendering of color parameter
+
+ Rendering of a full ColorNotebook for a ``color`` parameter
+
+.. versionchanged:: 1.0
+
+ *Implementation note:* colors values are internally treated as 32-bit
+ unsigned integers (unsigned long). Acceptable default values include
+ everything the standard library function ``strtoul`` [#]_ understands (since Inkscape 1.0).
+ Earlier Inkscape version only handled decimal numbers. The value passed
+ to the extension script will also be a decimal number.
+
+
+
+``float``
+~~~~~~~~~
+
+Creates a input to enter a **floating point number**. Limit the input
+range with the ``min`` and ``max`` attributes; set the number of decimal
+places with the ``precision`` attribute. (defaults: ``min="0"``,
+``max="10"`` and ``precision="1"``; default value: 0)
+
+.. code:: xml
+
+ <param name="name" type="float" precision="1" min="0" max="100"
+ gui-text="Float Parameter">1.234</param>
+
+Use the attribute ``appearance="full"`` to create a slider with which
+the value can be adjusted dynamically over the full range.
+
+.. figure:: widgets/float.png
+ :alt: Rendering of float parameter
+
+ Rendering of ``float`` parameters: default and with ``appearance="full"``
+
+``int``
+~~~~~~~
+
+Creates a textbox input to enter an **integer number**. Limit the input
+range with the ``min`` and ``max`` attributes. (defaults: ``min="0"``
+and ``max="10"``; default value: 0)
+
+.. code:: xml
+
+ <param name="name" type="int" min="1" max="100" gui-text="Integer Parameter">1</param>
+
+Use the attribute ``appearance="full"`` to create a slider with which
+the value can be adjusted dynamically over the full range.
+
+.. figure:: widgets/integer.png
+ :alt: Rendering of integer parameter
+
+ Rendering of ``int`` parameters: default and with ``appearance="full"``
+
+
+``notebook``
+~~~~~~~~~~~~
+
+Creates a set of pages (aka tab control). The user can switch between
+individual pages. Each page can contain an arbitrary set of other
+Widgets and Parameters. Individual pages are created with the element.
+
+The **returned value** for ``notebook`` parameters is the value of the
+``name`` attribute of the selected . By default the first page is
+selected.
+
+Notebooks can be used to show widgets based on an option; that option
+would be implemented as notebook.
+
+.. code:: xml
+
+ <param name="name" type="notebook">
+ <page name="page_1" gui-text="First page">
+ …
+ </page>
+ <page name="page_2" gui-text="Second page">
+ …
+ </page>
+ </param>
+
+.. figure:: widgets/notebook.png
+ :alt: Rendering of notebook parameter
+
+ Rendering of a ``notebook``
+
+
+``optiongroup``
+~~~~~~~~~~~~~~~
+
+Creates a control that allows to select one option **one option** from a
+set of multiple choices. The different choices are created with
+elements.
+
+The **returned value** for ``optiongroup`` type parameters is the value
+of the ``value`` attribute of the selected . By default the first is
+selected.
+
+.. code:: xml
+
+ <param name="name" type="optiongroup" appearance="radio/combo"
+ gui-text="Some label text">
+ <option value="1">First option</option>
+ <option value="2">Second option</option>
+ </param>
+
+.. versionadded:: 1.0
+ Set the attribute ``appearance="radio"``\ to render radio buttons
+ (default). Set the attribute ``appearance="combo"``\ to display a
+ drop-down list instead.
+
+.. figure:: widgets/optiongroup.png
+ :alt: Rendering of float parameter
+
+ Rendering of ``optionsgroup`` parameters: ``appearance="radio"`` and
+ ``appearance="combo"``. On the bottom parameter, ``precision="1"``
+ has been set.
+
+
+``path``
+~~~~~~~~
+
+
+.. versionadded:: 1.0
+
+Creates a control to choose a **path**. Paths can either be entered
+manually or by using the file chooser that can be opened using the
+ellipsis button.
+
+The ``mode`` attribute allows to set behavior of the file chooser (i.e.
+if files or folders can be selected, if they need to exist previously
+and if multiple selections are possible). The ``filetypes`` attribute
+holds a comma-separated list of file extensions and restricts the
+selectable file types in file picker mode.
+
+.. code::
+
+ <param type="path" name="varname" gui-text="label" mode="$mode" [filetypes="$filetypes"]/>
+
+Possible values for the ``mode`` attribute:
+
+- ``file`` - select a single existing file
+- ``files`` - select multiple existing files
+- ``folder`` - select a single existing folder
+- ``folders`` - select multiple existing folders
+- ``file_new`` - select a single new file name
+- ``file_new`` - select a single new folder name
+
+Examples
+
+- Files:
+
+ - Choose a file, with file type restriction (optional):
+
+ .. code:: xml
+
+ <param name="my_file" type="path" mode="file" filetypes="png,jpg" gui-text="A file:">my/path/to/file.png</param>
+ - Choose multiple files (file type restriction possible, too):
+
+ .. code:: xml
+
+ <param name="my_files" type="path" mode="files" gui-text="Multiple files:">my/path/to/file.png</param>
+ - Create a new file:
+
+ .. code:: xml
+
+ <param name="my_new_file" type="path" mode="file_new" filetypes="png" gui-text="A new file:">my/path/to/file.png</param>
+
+- Folders:
+
+ - Choose a folder:
+
+ .. code:: xml
+
+ <param name="my_folder" type="path" mode="folder" gui-text="A folder:">my/path/</param>
+ - Choose multiple folders:
+
+ .. code:: xml
+
+ <param name="my_folders" type="path" mode="folders" gui-text="Folders:">my/path/</param>
+ - Create a new folder:
+
+ .. code:: xml
+
+ <param name="my_new_folder" type="path" mode="folder_new" filetypes="png" gui-text="A new folder:">my/path/</param>
+
+
+.. figure:: widgets/path.png
+ :alt: Rendering of path parameter
+
+ Rendering of ``path`` parameters
+
+
+*Implementation note:* Existence of paths are not checked before passing
+them to the extension, so extension authors need to implement suitable
+error handling, especially in case of manual path entry. For multiple
+selections the individual paths are joined using the pipe character
+("|") and passed to the extension as a single string.
+
+``string``
+~~~~~~~~~~
+
+Creates a input to enter a **string**. Limit the number of characters
+the user is allowed to enter with the ``max-length`` attribute.
+(defaults: no character limit; default value: empty string)
+
+.. code:: xml
+
+ <param name="name" type="string" gui-text="Some text label">Some default text</param>
+
+.. versionadded:: 1.0
+ Set the attribute ``appearance="multiline"``\ to render a multi-line
+ input. Line-breaks will be encoded as literal ``\n`` in the value passed
+ to the extension.
+
+.. figure:: widgets/string.png
+ :alt: Rendering of string parameters
+
+ Rendering of ``string`` parameters: default and
+ ``appearance="multiline"``
+
+
+
+.. [#] https://en.cppreference.com/w/cpp/string/byte/strtoul \ No newline at end of file
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+ <path
+ d="m 71.100593,7.2167201 c 0.03261,-0.0487 0.07092,-0.087664 0.114901,-0.1168888 0.04399,-0.029225 0.09526,-0.05006 0.153824,-0.062502 0.07883,-0.016748 0.138853,-0.00878 0.180077,0.023889 0.04123,0.032323 0.0604,0.086829 0.05753,0.163504 l -0.01288,0.3436846 -0.124808,0.026568 0.01267,-0.3406412 c 0.002,-0.05462 -0.0093,-0.092442 -0.03398,-0.1134583 -0.02468,-0.02102 -0.06338,-0.025933 -0.116073,-0.014733 -0.06441,0.013689 -0.115903,0.040631 -0.154469,0.080824 -0.03856,0.04019 -0.05885,0.088107 -0.06088,0.1437449 l -0.0117,0.3218423 -0.124886,0.026585 0.01229,-0.3406794 c 0.002,-0.054966 -0.0094,-0.092791 -0.03413,-0.113468 -0.02473,-0.02102 -0.06391,-0.025832 -0.117552,-0.014433 -0.06355,0.013506 -0.114619,0.040532 -0.153188,0.081074 -0.03855,0.040199 -0.0588,0.087954 -0.06075,0.1432587 l -0.01134,0.3218777 -0.124983,0.026606 0.01991,-0.5698579 0.125144,-0.026589 -0.0031,0.088627 c 0.02964,-0.041008 0.06459,-0.074048 0.104853,-0.099119 0.04026,-0.025071 0.08767,-0.043401 0.142221,-0.054991 0.05499,-0.011684 0.101265,-0.011067 0.138814,0.00185 0.038,0.012817 0.0655,0.037293 0.08252,0.073424 z"
+ id="path86145"
+ inkscape:original-d="m 71.196561,9.40829 q 0.04754,-0.085438 0.113688,-0.1260904 0.06615,-0.040652 0.155718,-0.040652 0.120578,0 0.186035,0.084749 0.06546,0.08406 0.06546,0.2397785 V 10.031852 H 71.589991 V 9.5702093 q 0,-0.110932 -0.03928,-0.1646754 -0.03927,-0.053743 -0.119889,-0.053743 -0.09853,0 -0.155718,0.065457 -0.05719,0.065457 -0.05719,0.1784558 V 10.031853 H 71.090452 V 9.5702093 q 0,-0.111621 -0.03927,-0.1646754 -0.03927,-0.053743 -0.121267,-0.053743 -0.09715,0 -0.15434,0.066146 -0.05719,0.065457 -0.05719,0.1777668 V 10.031853 H 70.590914 V 9.260151 h 0.127468 v 0.1198892 q 0.04341,-0.070969 0.104042,-0.1047308 0.06063,-0.033762 0.144005,-0.033762 0.08406,0 0.142627,0.042719 0.05926,0.042719 0.08751,0.1240234 z" />
+ </g>
+ <text
+ xml:space="preserve"
+ style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:1.41111px;line-height:125%;font-family:sans-serif;-inkscape-font-specification:sans-serif;writing-mode:lr-tb;fill:#000000;stroke:none;stroke-width:1;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none"
+ x="9.8286581"
+ y="9.82693"
+ id="text73128-2"><tspan
+ sodipodi:role="line"
+ style="font-size:1.41111px;fill:#000000;stroke:none;stroke-width:1"
+ x="9.8286581"
+ y="9.82693"
+ id="tspan81002-8">viewport coordinate system</tspan></text>
+ </g>
+</svg>
diff --git a/share/extensions/docs/authors/samples/units1.svg b/share/extensions/docs/authors/samples/units1.svg
new file mode 100644
index 0000000..b221eda
--- /dev/null
+++ b/share/extensions/docs/authors/samples/units1.svg
@@ -0,0 +1,4 @@
+<svg xmlns='http://www.w3.org/2000/svg'
+ width="200" height="100">
+ <rect x="0" y="0" width="200" height="100" fill="#aaa"/>
+</svg> \ No newline at end of file
diff --git a/share/extensions/docs/authors/samples/units2.svg b/share/extensions/docs/authors/samples/units2.svg
new file mode 100644
index 0000000..cf2fe17
--- /dev/null
+++ b/share/extensions/docs/authors/samples/units2.svg
@@ -0,0 +1,9 @@
+<svg xmlns='http://www.w3.org/2000/svg'
+ width="84mm" height="56mm" viewBox="0 0 84 56" fill="none">
+ <rect x="0" y="0" width="84" height="56" stroke="orange" stroke-width="2px"/>
+ <path d="M 0, 14 H 84" stroke="black" stroke-width="0.2px"/>
+ <path d="M 21, 0 V 56" stroke="black" stroke-width="0.2px"/>
+ <circle id="c1" r="2" cx="21" cy="14" stroke="red" stroke-width="0.5"/>
+ <circle id="c2" r="4px" cx="21px" cy="14px" stroke="green" stroke-width="0.5px"/>
+ <circle id="c3" r="0.5mm" cx="21mm" cy="14mm" stroke="blue" stroke-width="0.5mm"/>
+</svg> \ No newline at end of file
diff --git a/share/extensions/docs/authors/submit.rst b/share/extensions/docs/authors/submit.rst
new file mode 100644
index 0000000..c140009
--- /dev/null
+++ b/share/extensions/docs/authors/submit.rst
@@ -0,0 +1,97 @@
+Submitting and reviewing extensions
+===================================
+
+This page details how extensions can be submitted to and moderated on
+the Inkscape website.
+
+I want to submit my extension
+-----------------------------
+
+Go through each of these actions and check to make sure your extension
+is ready to be made available in Inkscape:
+
+#. Check for limitations
+
+ * Your extension must not contact the internet (unless exempted for a good reason)
+ * It must not self-update, or edit files in the config directory.
+ * It must be readable code, in English. Code in other languages or too obscure may not be accepted.
+
+#. Check the license of your code
+
+ * Your code must be Free and Open Source. Using one of the available licenses such
+ as GPL, AGPL, MIT, Apache2 etc.
+ * Every included dependency must be also Free and Open Source.
+
+#. Check all of your dependencies
+
+ * Your extension MUST be python based (except for template extensions)
+ * It MUST work with python 3.6 or later
+ * Any dependency not shipped with Inkscape MUST be packaged along side your
+ extension. For example jinja2 would be included in a folder.
+
+#. Create a zip file of your extension and any external depdencies.
+
+ * Include only one copy in the root of the zip file.
+ * No specific versions for windows or linux, macOS.
+
+#. Check which versions of Inkscape it works with (each one, make a note for tagging
+ later)
+
+ * set the variable "INKSCAPE_PROFILE_DIR=/tmp/folder"
+ * run the inkscape version
+ * open the extensions manager
+ * install the zip file you hope to submit (second tab, folder button at the bottom)
+ * Your extension MUST work with at least one version of Inkscape.
+
+#. Sign your zip file
+
+ * Use GnuPG to sign your zip file, use the same signature as the public key you
+ uploaded to inkscape.org
+ * OR use md5hash to create a less secure md5 signature of the zip file. Make sure
+ you have some text in your inkscape.org gnupg key profile setting so you see the
+ signature field when uploading.
+
+#. Upload the zip file to the extensions category in the website.
+
+ * Include the generated signature
+ * Title and description in English with as much detail as possible
+ * Add Inkscape versions as you tested above.
+ * Include a link to the Git repository.
+ * Include an icon and screenshot file.
+
+#. Send a message to the Inkscape extensions team on `RocketChat`_ asking for a review.
+
+.. _RocketChat: https://chat.inkscape.org/channel/inkscape_extensions
+
+I want to review a submission
+-----------------------------
+
+Extensions Reviewer Checklist
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+- ☐ Take next popular extension [#]_ or request to review
+- ☐ Check for existing verification signature
+- ☐ Contact author to inform about review
+- ☐ Unpack zip to extensions folder
+- ☐ Check zip contents for inx and py file
+- ☐ Check for license header and/or file
+- ☐ Run pytest and record test coverage
+- ☐ Run pylint to get code quality score
+- ☐ Visually confirm no mallicious or internet code
+- ☐ If no tests, add simple test upstream [#]_
+- ☐ Install zip using extensions manager
+- If everything is correct …
+- ☐ Add version tags and any other tags
+- ☐ Edit description, title, logos to improve presentation
+- ☐ contact a website administrator to complete
+
+If everything is correct (must be admin):
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+- ☐ Add testing and quality scores to decription
+- ☐ Generate signature key and upload
+- ☐ Generate md5 if package is not self-signed
+
+.. [#] https://inkscape.org/gallery/=extension/
+
+.. [#] Add simple inkex.tester comparision test \ No newline at end of file
diff --git a/share/extensions/docs/authors/unit-tests.rst b/share/extensions/docs/authors/unit-tests.rst
new file mode 100644
index 0000000..3384d59
--- /dev/null
+++ b/share/extensions/docs/authors/unit-tests.rst
@@ -0,0 +1,67 @@
+.. _unittests:
+
+Writing unit tests
+==================
+
+All Inkscape extensions should come with tests. This package provides you with
+the tools needed to create tests and thus ensure that your extension continues
+to work with future versions of Inkscape, the "inkex" python modules, and other
+python and non-python tools you may use.
+
+Make sure your extension is a python extension and is using the
+:py:mod:`inkex.extensions` base classes. These provide the greatest amount of
+functionality for testing.
+
+You should start by creating a folder in your repository called ``tests`` with
+an empty file inside called ``__init__.py`` to turn it into a module folder.
+
+For each of your extensions, you should create a file called
+``test_{extension_name}.py`` where the name reflects the name of your extension.
+
+There are two types of tests:
+
+1. Full-process Comparison tests - These are tests which invoke your
+ extension with various arguments and attempt to compare the
+ output to a known good reference. These are useful for testing
+ that your extension would work if it was used in Inkscape.
+
+ Good example of writing comparison tests can be found in the
+ Inkscape core repository, each test which inherits from
+ the ComparisonMixin class is running comparison tests.
+
+2. Unit tests - These are individual test functions which call out to
+ specific functions within your extension. These are typical
+ python unit tests and many good python documents exist
+ to describe how to write them well. For examples here you
+ can find the tests that test the inkex modules themselves
+ to be the most instructive.
+
+When running a test, it will cause a certain fraction of the code within the
+extension to execute. This fraction called it's **coverage** and a higher
+coverage score indicates that your test is better at exercising the various
+options, features, and branches within your code.
+
+.. versionadded:: 1.2
+ ``EXPORT_COMPARE`` environment variable
+
+Generating comparison output can be done using the EXPORT_COMPARE environment
+variable when calling pytest and comes in 3 modes, the first of which is the
+CHECK comparisons mode::
+
+ EXPORT_COMPARE=1 pytest tests/test_my_specific_test.py
+
+This will create files in ``tests/data/refs/*.{ext}`` and these files
+should be manually checked to make sure they are correct. Once you are happy
+with the output you can re-run the test with the WRITE comparisons mode::
+
+ EXPORT_COMPARE=2 pytest tests/test_my_specific_test.py
+
+Which will create an output file of the right name and then run the test suite
+against it. But only if the file doesn't already exist. The final mode is the
+OVERWRITE comparisons mode::
+
+ EXPORT_COMPARE=3 pytest tests/test_my_specific_test.py
+
+This is like mode 2, but will over-write any existing files too. This allows
+you to update the test compare files.
+
diff --git a/share/extensions/docs/authors/units.rst b/share/extensions/docs/authors/units.rst
new file mode 100644
index 0000000..055fbfd
--- /dev/null
+++ b/share/extensions/docs/authors/units.rst
@@ -0,0 +1,316 @@
+.. _units:
+
+Units
+=================
+
+If you are reading this page, you are probably confused about how units work in Inkscape, inkex and
+SVG in general. This is understandable, since there's quite a bit of conflicting information online.
+
+Units in SVG
+------------
+
+SVG means "scalable vector graphics". This introduces an inherent difficulty with how to map units
+to the real world. Should units be pixels? Millimeters? Something else? The answer to this depends
+on the output format you're targeting.
+
+The authors of the SVG specification solved this problem by introducing an abstract "dimensionless"
+unit called **user units**. The SVG1.1 specification [1]_ is quite clear about their definition:
+
+ *One px unit is defined to be equal to one user unit.
+ Thus, a length of "5px" is the same as a length of "5".*
+
+So whenever you read "user unit", think "pixel". And when you encounter a coordinate without unit,
+it's specified in user units, i.e. pixels. You might have heard or read something like "I can choose
+the unit of a document, so that one user unit equals one millimeter". This statement is misleading,
+although not entirely wrong. It will be explained below.
+
+An `<svg>` tag has two different properties that influence its size and the mapping of coordinates.
+These are called *viewport coordinate system* and *user coordinate system*.
+
+And as the name indicates, **user units always refer to the user coordinate system**. So for
+the next section which explains the **viewport coordinate system**, forget user units.
+
+Viewport coordinate system
+^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+The viewport coordinate system is [2]_
+
+ *[...] a top-level SVG viewport that establishes a mapping between the coordinate system used by the
+ containing environment (for example, CSS pixels in web browsers) and user units.*
+
+The viewport coordinate system is established by the ``width`` and ``height`` attributes of the SVG tag.
+To reformulate the quote above: The viewport tells the SVG viewer how big the visible part of the
+canvas should be *rendered*. It may be ``200px x 100px`` on your screen (``width="200px" height="100px"``)
+or ``210mm x 297mm`` (``width="210mm" height="297mm"``), i.e. one A4 page.
+
+ *If the width or height presentation attributes on the outermost svg element are in user units
+ (i.e., no unit identifier has been provided), then the value is assumed to be equivalent to the
+ same number of "px" units.* [3]_
+
+Expressed in simple terms: if no unit has been specified in the ``width`` or ``height`` attributes,
+assume the user means pixels. Otherwise, the unit is converted by the SVG viewer. Inkscape uses a
+DPI of 96 px/in, and corresponding conversions for mm, yd etc. are used.
+
+Consider the following SVG file:
+
+.. code-block:: XML
+
+ <svg xmlns='http://www.w3.org/2000/svg' width="200" height="100">
+ <rect x="0" y="0" width="200" height="100" fill="#aaa"/>
+ </svg>
+
+which renders as follows:
+
+.. image:: samples/units1.svg
+
+If your browser zoom is set to 100%, this image should have a size of 100 times 200 pixels,
+and is filled with a grey rectangle. You can verify this by taking a screenshot.
+
+Likewise, in ``mm`` based documents, you might see code such as
+``width="210mm" height="297mm"`` which tells an standard-compliant program that if printed or
+exported to PDF, the document should span an entire A4 page.
+
+User coordinate system
+^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+You may have noticed that we didn't explicitly specify in the above svg that we want to draw
+everything within the area with the coordinates ``0 ≤ x ≤ 200`` and ``0 ≤ y ≤ 100``. This was
+done for us automatically since we specified ``width`` and ``height``. The ``viewBox`` attribute
+allows to change this.
+
+Again from the specification [4]_:
+
+ *The effect of the viewBox attribute is that the user agent automatically supplies the
+ appropriate transformation matrix to map the specified rectangle in user coordinate system
+ to the bounds of a designated region (often, the SVG viewport).*
+
+Let's break this down. Imagine the ``viewBox`` attribute as a camera that moves over the infinite
+canvas. It can zoom in or out and move around - but whatever image the camera outputs, it is
+rendered in the rectangle defined by ``width`` and ``height``, i.e. the viewport. Initially, the
+camera is located such that the region ``viewBox="0 0 width height"`` is pictured. We may
+however modify the viewBox as we wish.
+
+In a ``mm`` based documents, where we specified ``width="210mm" height="297mm"``, the viewbox is
+initially ``viewBox="0 0 793.7 1122.5"`` due to the conversion from mm to px. This means that the
+bottom right corner is at ``(210, 297) mm * 1/25.4 in/mm * 96 px/in ≈ (793.7, 1122.5) px``.
+
+As already mentioned: no units means user unit means pixels. So a rectangle with
+``x="793.7" y="1122.5"`` (no units specified) is at the bottom right corner of the page. It would be
+nicer if unitless values would be implicitly in millimeters, so we could specify such a rectangle
+with ``x="210" y="297"``. This can be done with the ``viewBox`` attribute and will be explained with
+an example SVG.
+
+Let's say we want to design a business card that should eventually be *printed on 84mm x 56mm*, so
+we specifiy ``width="84mm" height="56mm"```. We also want the user units to behave like real-world
+millimeters, so we have to zoom the viewbox camera: ``viewBox="0 0 84 56"``. As mentioned above,
+no units means px, so these attributes together tell the SVG viewer "move the camera in such a way
+that (84, 56) in user units, i.e. px, is the bottom right corner, and scale the image such that when
+printed or rendered it has a size of 84mm by 56mm".
+
+You can imagine this situation like this [5]_:
+
+.. image:: samples/unit_camera.svg
+
+To illustrate this, we draw a crosshair at ``(14, 21)`` (note: no units in the path specification!),
+i.e. a fourth horizontally and vertically for reference. Then we draw three circles: one at
+``(21, 14)``, one at ``(21px, 14px)`` and one at ``(21mm, 14mm)``.
+
+.. code-block:: XML
+
+ <svg xmlns='http://www.w3.org/2000/svg' width="84mm" height="56mm" viewBox="0 0 84 56" fill="none">
+ <rect x="0" y="0" width="84" height="56" stroke="orange" stroke-width="2px"/>
+ <path d="M 0, 14 H 84" stroke="black" stroke-width="0.2px"/>
+ <path d="M 21, 0 V 56" stroke="black" stroke-width="0.2px"/>
+ <circle id="c1" r="2" cx="21" cy="14" stroke="red" stroke-width="0.5"/>
+ <circle id="c2" r="4px" cx="21px" cy="14px" stroke="green" stroke-width="0.5px"/>
+ <circle id="c3" r="0.5mm" cx="21mm" cy="14mm" stroke="blue" stroke-width="0.5mm"/>
+ </svg>
+
+.. image:: samples/units2.svg
+
+The rendered image at 100% browser resolution should be approximatly ``85mm`` by ``56mm``, but this
+highly depends on your screen resolution.
+
+Note that the first two circles specified without unit
+(i.e. user units) and specified in px are at the correct position and identical except for radius
+and stroke color.
+
+The third circle's coordinates, radius and stroke-width are specified in mm. It should be located
+somewhere near the bottom right corner (where exactly depends on the DPI conversion of your browser,
+but most browsers use ``96dpi = 96 px/in`` today, which yields a conversion factor of approx.
+``3.77px/mm``). The stroke is thicker by the same factor and the radius has been reduced to be
+comparable to the first circle.
+
+This is somewhat unintuitive. Didn't we create a mm based document? Now we can explain the
+statement from the introduction
+"I can choose the unit of a document, so that one user unit equals one millimeter".
+We didn't change the core statement "no unit = user unit = pixels" by specifying width and
+height in mm. But the special choice of the viewbox attribute - the same width and height, but
+without the unit) makes the following statement true: "**One user unit looks like one millimeter on
+the output device** (e.g. screen or paper)".
+
+Now you understand why appending "mm" to the circle's position moved it. The transformation px->mm
+has been applied twice! Once in the coordinate specification itself, and once by the "camera".
+
+
+Units in Inkex
+-----------------
+
+As an extension autor, you may have four different questions regarding units.
+
+What is the position of this object [in the user coordinate system]?
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+This is a question that typically needs to be answered if you want to position an object relative
+to other objects, whose coordinates may be specified in a different unit.
+
+The most convenient way to deal with this is to get rid of the units, and that means converting
+everything to user units.
+
+Each :class:`BaseElement <inkex.elements._base.BaseElement>` has a method
+:meth:`to_dimensionless <inkex.elements._base.BaseElement.to_dimensionless>`. This method parses a
+``length`` value and returns it, converted to px (user units).
+
+:meth:`~inkex.elements._base.BaseElement.to_dimensionless` fulfils the following task:
+**Convert this string from the XML into a number, while processing the unit.
+When using this function on any SVG attribute and replacing the
+original value with the result, the output doesn't change visually.**
+
+In these and the following examples, the above "business card" SVG will be used.
+
+>>> svg = inkex.load_svg("docs/samples/units2.svg").getroot()
+>>> svg.to_dimensionless(svg.getElementById("c1").get("cx"))
+21.0
+>>> svg.to_dimensionless(svg.getElementById("c2").get("cx"))
+21.0
+>>> svg.to_dimensionless(svg.getElementById("c3").get("cx"))
+79.370078
+
+For some classes, e.g. :class:`Rectangle <inkex.elements._polygons.Rectangle>`, convenience
+properties are available which do the conversion for you, e.g.
+:attr:`Rectangle.left <inkex.elements._polygons.RectangleBase.left>`. Similarly there are some
+properties for circles:
+
+>>> svg.getElementById("c3").center
+Vector2d(79.3701, 52.9134)
+>>> svg.getElementById("c2").radius
+4.0
+
+What is the dimension of an object in a specified unit in the user coordinate system?
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+You can also convert from user units to any unit. This is done using
+:meth:`BaseElement.to_dimensional <inkex.elements._base.BaseElement.to_dimensional>`.
+
+>>> svg.to_dimensional(svg.getElementById("c2").radius, "px")
+4.0
+>>> svg.to_dimensional(svg.getElementById("c2").radius, "mm")
+1.0583333333333333
+
+What is the dimension of an object on the viewport in arbitrary units?
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+This is useful if you want to draw a property of a shape (for example its area) as text on the
+canvas, in a unit specified by the user. The default unit to convert to is px.
+
+The method for this is called :meth:`BaseElement.unit_to_viewport <inkex.elements._base.BaseElement.unit_to_viewport>`.
+
+>>> svg.unit_to_viewport(svg.getElementById("c2").radius)
+15.118110236220472
+>>> svg.unit_to_viewport(svg.getElementById("c2").radius, "mm")
+4.0
+>>> svg.unit_to_viewport("4", "mm")
+4.0
+
+In other words, ``unit_to_viewport(value, unit="px")`` answers the following
+question: **What does the the width/height widget of the selection
+tool (set to** ``unit`` **) show when selecting an element with width**
+``value`` **as defined in the SVG?** Consider again
+``<svg width="210mm" viewBox="0 0 105 147.5"><rect width="100" height="100"/></svg>``
+, i.e. a "mm-based" document with scale=2. When selecting this rectangle, the rectangle tool
+shows ``viewport_to_unit("100", unit="mm") = 200``, if the rectangle tool is set to mm.
+
+Obviously the element needs to know the viewport of its SVG document for this. This method therefore
+does not work if the element is unrooted.
+
+
+How big does an object have to be to have the specified size on the viewport?
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+This is useful if you want to draw a shape at a given location on the viewport, regardless of
+what the user coordinate system is. This is done using
+:meth:`BaseElement.viewport_to_unit <inkex.elements._base.BaseElement.viewport_to_unit>`.
+
+>>> svg.viewport_to_unit("4mm", "px")
+4.0
+>>> svg.viewport_to_unit("4mm", "mm")
+1.0583333333333333
+
+An example for this would be text elements. In order for text to show up in Inkscape's text
+tool as ``9pt``, you have to user
+
+>>> element.style["font-size"] = self.svg.viewport_to_unit("9pt")
+
+Again, this method will raise an error if the element is unrooted.
+
+In other words, ``viewport_to_unit(value, target_unit="px")`` answers the following question:
+**What is the SVG representation of entering** ``value`` **in the width/height widget of the
+selection tool (set to the unit of value)?** Consider
+``<svg width="210mm" viewBox="0 0 105 147.5"><rect width="?" height="?"/></svg>``,
+i.e. a "mm-based" SVG with scale=2. When typing ``200`` in the
+rectangle tool, set to mm, the XML editor shows ``100`` =
+``100px``. That's what ``viewport_to_unit("200mm") = 100`` does.
+
+Note that this is different than
+``viewport_to_unit("200", "mm")``, which would be for a rectangle
+with a width (in the width/height widget of the rectangle tool) of
+200 (px), while writing the width in ``mm`` *in the SVG*:
+``<rect width="7.00043mm" height="7.00043mm"/>``.
+
+Document dimensions
+^^^^^^^^^^^^^^^^^^^^^^^^
+
+* :attr:`SvgDocumentElement.viewport_width <inkex.elements._svg.SvgDocumentElement.viewport_width>`
+ and
+ :attr:`SvgDocumentElement.viewport_height <inkex.elements._svg.SvgDocumentElement.viewport_height>`
+ are the width and height of the viewport coordinate system, i.e. the "output screen" of the
+ viewBox camera, in pixels. In above example: ``(317.480314, 211.653543)``
+
+.. code-block:
+ 84mm * 96px/in / (25.4mm/in) = 317.480314
+ [output size] [resolution 96dpi] [output size in pixels]
+
+* :attr:`SvgDocumentElement.viewbox_width <inkex.elements._svg.SvgDocumentElement.viewbox_height>`
+ and
+ :attr:`SvgDocumentElement.viewbox_height <inkex.elements._svg.SvgDocumentElement.viewbox_height>`
+ are the width and height of the user coordinate system, i.e. for a viewport without offset, the
+ largest ``x`` and ``y`` values that are visible to the viewport camera.
+ In above example: ``(84, 56)``
+
+Conversion between arbitrary units
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+The functions listed above are methods of :class:`BaseElement <inkex.elements._base.BaseElement>`
+because they use properties of the root SVG. For an unrooted SVG fragment,
+:meth:`BaseElement.to_dimensionless <inkex.elements._base.BaseElement.to_dimensionless>`.
+:meth:`BaseElement.to_dimensional <inkex.elements._base.BaseElement.to_dimensional>` work as well.
+
+If you want to convert between arbitrary units, you can do so using the
+:meth:`convert_unit <inkex.units.convert_units>` method:
+
+>>> inkex.units.convert_unit("4mm", "px")
+15.118110236220472
+
+
+Note that inkex doesn't support relative units (percentage, `em` and `ex`) yet. You will have to
+implement these yourself if you want your extension to support them.
+
+.. [1] https://www.w3.org/TR/SVG11/coords.html#Units
+.. [2] https://www.w3.org/TR/SVG2/coords.html#Introduction
+.. [3] https://www.w3.org/TR/SVG2/coords.html#ViewportSpace
+.. [4] https://www.w3.org/TR/SVG2/coords.html#ViewBoxAttribute
+.. [5] Note that this drawing has ``width="100%" height="" viewBox="0 0 88.540985 36.87265"``.
+ This instructs the viewer that the SVG should span the entire width of the containing
+ element (in this case, an HTML div) and the height should be chosen such that the image
+ is scaled proportionally. Inkex doesn't support these relative units and these don't really
+ make sense in standalone SVGs anyway. \ No newline at end of file
diff --git a/share/extensions/docs/authors/update1.0.rst b/share/extensions/docs/authors/update1.0.rst
new file mode 100644
index 0000000..294af52
--- /dev/null
+++ b/share/extensions/docs/authors/update1.0.rst
@@ -0,0 +1,301 @@
+Updating your extension for Inkscape 1.0
+========================================
+
+.. warning:: This information is partially outdated.
+
+This is a preliminary and incomplete list of actions to take for
+updating Python extensions for Inkscape 1.0:
+
+.. _adjusting_folder_structure:
+
+Adjusting folder structure
+--------------------------
+
+For easier extension 'installation' by users and for having a better
+overview about the installed extensions, you can now put extensions into
+their own subfolders of the ``extensions`` directory. This is optional.
+
+When specifying the command in the .inx file, you can use the new
+parameter 'location'.
+
+- If you set ``location="extensions"`` (de-facto default in 0.92.x), it
+ will assume the path is relative to either user or system extensions
+ folder.
+- If it's ``location="inx"`` (new and recommended in 1.0), it will
+ assume the path is relative to the .inx file location.
+
+An extension that uses the following snippet:
+
+.. code:: xml
+
+ <script>
+ <command location="inx" interpreter="python">hello.py</command>
+ </script>
+
+can be put into any subfolder in ``extensions`` or into the
+``extensions`` folder itself, as long as the file ``hello.py`` is in
+that same folder, at the same hierarchy level.
+
+The old parameter ``reldir`` is deprecated. It is recommended to use
+Unix style path separators (i.e. ``/``), if your script file is located
+in a nested subdirectory (should be a very rare case).
+
+.. _updating_.inx_files:
+
+Updating \*.inx files
+---------------------
+
+.. _remove_dependency_listings:
+
+Remove dependency listings
+~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Remove the dependency listings for the following modules:
+
+- bezmisc.py
+- coloreffect.py
+- cspsubdiv.py
+- cubicsuperpath.py
+- ffgeom.py
+- inkex.py (removal not strictly required)
+- pathmodifier.py
+- simplepath.py
+- simplestyle.py
+- simpletransform.py
+- more?
+
+This change is backwards compatible (as long as the user has a fully
+functioning Inkscape installation). Not removing these will result in
+the extension not being selectable (disabled and greyed out) in Inkscape
+1.0 or higher.
+
+.. _changes_to_parameter_definitions:
+
+Changes to parameter definitions
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+There are also some updates to the parameter definitions in .inx files.
+While these are intended to be backwards compatible to 0.92, you may
+wish to review the changes below:
+
+- **Underscores** in inx parameter tags and attributes for translation
+ **can be dropped** entirely. Use ``translatable="no"`` to make an
+ item (e.g. a unit name) untranslatable.
+- ``boolean`` can be renamed to ``bool``
+- ``<param type="enum" />`` is deprecated, instead use optiongroups.
+ Remember to rename ``item`` to ``option`` when replacing.
+- In optiongroups ``appearance="minimal"`` is deprecated.
+
+ - In optiongroups you can now define dropdown selections
+ (comboboxes) and radio buttons.
+ - i.e. ``<param type="optiongroup" appearance="combo" />``, or
+ ``<param type="optiongroup" appearance="radio" />``.
+
+- Choosing files / folders with ``<param type="path" />``
+ (these return the path as a string to the Python script)
+- Color choosers: make them more compact with
+ ``appearance="colorbutton"`` for parameters of type ``color``
+- Multiline text entry fields are available with
+ ``appearance="multiline"`` for parameters of type ``string``
+- The following new widgets (static, do not need to be read in by the
+ .py file's option parser anymore):
+
+ - ``label``: (``<label>Some text</label>``), replaces parameters of type
+ ``description`` (which never really were parameters in the actual
+ sense), optionally with ``appearance="header"``.
+ - ``hbox``/``vbox``: for layouting purposes (allow to pack child
+ widgets into horizontally/vertically oriented boxes)
+ - ``<spacer/>`` / ``<separator/>``: which add a variable space or separating line between child
+ widgets.
+ - ``<image>my_image.svg</image>``: which allows to display an image in the
+ extension UI
+
+See :ref:`inx-widgets` for more details.
+
+Example file with many of the new features:
+
+.. code:: xml
+
+ <?xml version="1.0" encoding="UTF-8"?>
+ <inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
+ <name>Layout Demo</name>
+ <id>org.inkscape.test.layout_demo</id>
+ <dependency type="executable" location="extensions">pathmodifier.py</dependency>
+
+ <hbox>
+ <vbox>
+ <label appearance="header">Multiple vboxes packed into an hbox</label>
+ <hbox>
+ <vbox>
+ <label>Vertical stack</label>
+ <param name="param_bool" type="bool" gui-text="Boolean">true</param>
+ <param name="param_int" type="int" gui-text="Int:" >12345</param>
+ <param name="param_float" type="float" gui-text="Float:">1.2345</param>
+ <param name="param_color" type="color" appearance="colorbutton" gui-text="Color:">0x12345678</param>
+ </vbox>
+ <spacer />
+ <vbox>
+ <label>Vertical stack with separators</label>
+ <param name="param_string" type="string" gui-text="Single line string:">a string value</param>
+ <separator></separator>
+ <param name="param_string_empty" type="string" gui-text="Empty single line:"></param>
+ <separator></separator>
+ <param name="param_string_multiline" type="string" appearance="multiline" gui-text="Multiline string:">a\nmultiline\nstring\nvalue</param>
+ </vbox>
+ <spacer />
+ <vbox>
+ <label>Vertical stack with spacers</label>
+ <param name="param_file_new" type="path" mode="file_new" filetypes="png" gui-text="A new file:">my/path/to/file.png</param>
+ <spacer />
+ <param name="param_file" type="path" mode="file" filetypes="png,jpg" gui-text="A file:">my/path/to/file.png</param>
+ <spacer />
+ <param name="param_files" type="path" mode="files" gui-text="Multiple files:">my/path/to/file.png</param>
+ <spacer />
+
+ </vbox>
+ <spacer />
+ <vbox>
+ <label>Vertical stack with expanding spacer</label>
+ <spacer size="expand"/>
+ <param name="param_folder" type="path" mode="folder" gui-text="A folder:">my/path/</param>
+ <param name="param_folders" type="path" mode="folders" gui-text="Folders:">my/path/to/file.png</param>
+ <param name="param_folder_new" type="path" mode="folder_new" gui-text="A new folder:">my/path/</param>
+ </vbox>
+ <spacer />
+ <vbox>
+ <label appearance="header">An image!</label>
+ <image>ink_icon.svg</image>
+ <spacer />
+ <label appearance="header" indent="1">Indented header</label>
+ <spacer />
+ <label>For details please refer to</label>
+ <label appearance="url" indent="1">https://clickable.url</label>
+ </vbox>
+ </hbox>
+ </vbox>
+ </hbox>
+
+ <effect needs-live-preview="false">
+ <object-type>all</object-type>
+ <effects-menu>
+ <submenu _name="Test"/>
+ </effects-menu>
+ </effect>
+ <script>
+ <command reldir="extensions" interpreter="python">do_nothing.py</command>
+ </script>
+ </inkscape-extension>
+
+.. _updating_.py_files:
+
+Updating \*.py files
+--------------------
+
+.. _collecting_the_options_of_the_extension:
+
+Collecting the options of the extension
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+#. Instead of ``inkex.Effect.OptionParser.add_option``, your extension
+ should now use ``inkex.Effect.arg_parser.add_argument``.
+#. The 'type' option now works with variables instead of strings. Use
+ ``int`` instead of ``"int"`` (same for float,...).
+#. The 'inkbool' type is now ``inkex.Boolean``.
+#. ``action="store"`` can be removed.
+
+These changes are not backwards compatible. The old options will still
+work, but are deprecated and should no longer be used when you develop
+your extension for Inkscape 1.0 or higher.
+
+.. _replace_specific_functions:
+
+Replace specific functions
+~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+When the .inx file is valid and not greyed out (meaning: a dependency is
+missing), you can start building the .py file up again.
+
+In the Inkscape extensions refactoring process for Inkscape 1.0, many
+inkex functions have been removed, or renamed, or moved, or options have
+changed. Wherever possible, Inkscape will try to replace the old
+function by the new one, and will give you a deprecation warning, with
+instructions what to replace them by.
+
+E.g. ``inkex.Effect.selected`` is replaced by
+``inkex.Effect.svg.selected`` - however, most replacements do not follow
+this naming scheme translation.
+
+These changes are not backwards compatible.
+
+.. _python_3_python_2_compatibility:
+
+Python 3 / Python 2 compatibility
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. warning:: Starting from Inkscape 1.1, only Python 3 is supported.
+
+Test your extension with both Python 2 and Python 3, if you want it to
+work for as many users as possible. With the updated extensions,
+Inkscape does no longer require Python 2, so some users will probably be
+using Python 3, and may no longer have Python 2 installed on their
+system. See `Extension_Interpreters <Extension_Interpreters>`__ for how
+to set the Python version for your extension in the preferences file
+(for testing).
+
+.. _getting_your_extension_added_to_inkscapes_stock_extensions:
+
+Getting your extension added to Inkscape's stock extensions
+-----------------------------------------------------------
+
+Inkscape now has a `separate repository for its Python
+extensions <https://gitlab.com/inkscape/extensions>`__, which is
+included into Inkscape proper by using a Git submodule.
+
+.. _writing_tests:
+
+Writing tests
+~~~~~~~~~~~~~
+
+Previously Inkscape didn't require any unit testing for code. You should
+now write test code if you expect your module to be included into the
+Inkscape extensions repository and included in the shipped Inkscape
+release. In this case, a test suite file should be made in the tests
+directory for your extension. It should test each aspect of your
+extension and exercise all assumptions.
+
+If you are writing a standalone extension that users will install
+themselves, there is no strict requirement for tests. But having them
+will greatly improve your code and your ability to upgrade the code
+later. You can have tests in your own folders and use the extension's
+setup.py as a harness to run them (a setup.py file is also useful for
+installing your python code as a non-inkscape related python module,
+which might be useful too). See Python documentation for creating
+packages.
+
+.. _documenting_your_extension:
+
+Documenting your extension
+~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Docstrings
+----------
+
+Include docstrings in your extension, so documentation can be built from
+them automatically.
+
+.. _submitting_your_extension_for_inclusion:
+
+Submitting your extension for inclusion
+---------------------------------------
+
+Visit https://gitlab.com/inkscape/extensions, fork the repository, and
+create a merge request on GitLab.
+
+.. _external_links:
+
+External links
+--------------
+
+A script to perform some of the conversion steps automatically has been
+contributed: https://gitlab.com/inkscape/extensions/-/issues/380
+
diff --git a/share/extensions/docs/authors/update1.2.rst b/share/extensions/docs/authors/update1.2.rst
new file mode 100644
index 0000000..d50323a
--- /dev/null
+++ b/share/extensions/docs/authors/update1.2.rst
@@ -0,0 +1,229 @@
+Updating your extension for Inkscape 1.2
+=========================================
+
+This page is intended for extension authors who want to use the new
+capabilities of inkex in Inkscape 1.2. As of the Release of 1.2alpha
+(Feb 5, 2022), no more breaking changes will be introduced until the
+final release of 1.2.
+
+There are no breaking changes in this release, but a few methods have
+been deprecated.
+
+.. _deprecating_changes:
+
+Deprecating changes
+-------------------
+
+- The Transforms multiplication operator has been changed from ``*``
+ (``*=``) to ``@`` (``@=``), in accordance with
+ `PEP-465 <https://www.python.org/dev/peps/pep-0465/>`__ (`MR
+ extensions#389 <https://gitlab.com/inkscape/extensions/-/merge_requests/389>`__,
+ `Issue
+ extensions#327 <https://gitlab.com/inkscape/extensions/-/issues/327>`__)
+- ``svg.width`` and ``svg.height`` have been deprecated, and replaced
+ with ``svg.viewbox_width``, ``svg.viewport_width``,
+ ``svg.viewbox_height`` and ``svg.viewport_height``, see `New Units
+ API <Updating_your_Extension_for_1.2#New_Units_API>`__.
+- ``selection.paint_order`` has been renamed to
+ ``selection.rendering_order`` to be conformant with the specification
+ (`MR
+ extensions#344 <https://gitlab.com/inkscape/extensions/-/merge_requests/344>`__,
+ `Issue
+ extensions#310 <https://gitlab.com/inkscape/extensions/-/issues/310>`__)
+- ``FallbackStyle`` has been deprecated in favor of ``Style``, see `New
+ Style API <Updating_your_Extension_for_1.2#New_Style_API>`__.
+
+.. _new_style_api:
+
+New Style API
+-------------
+.. figure:: samples/Comparison_of_Lighter_extension_in_Inkscape_1.1.2_and_1.2.png
+
+ Top: W3C SVG1.1 Test suite,
+ test `styling-css-04-f.svg <https://www.w3.org/Graphics/SVG/Test/20110816/harness/htmlObjectApproved/styling-css-04-f.html>`__.
+ This test includes various CSS selectors, and includes group inheritance
+ and pseudo-selectors. It is rendered correctly in Inkscape 1.2. Bottom
+ left: Output of the "Lighter" extension in Inkscape 1.1.2, only two
+ squares are processed correctly, two squares have a wrong color and the
+ other 14 raise unhandled exceptions. Bottom right: Correct output in
+ Inkscape 1.2. This shows that inkex correctly handles different types of
+ CSS selectors.
+
+Added in `MR
+extensions#294 <https://gitlab.com/inkscape/extensions/-/merge_requests/294>`__,
+`MR
+extensions#296 <https://gitlab.com/inkscape/extensions/-/merge_requests/296>`__,
+`MR
+extensions#298 <https://gitlab.com/inkscape/extensions/-/merge_requests/298>`__,
+`MR
+extensions#300 <https://gitlab.com/inkscape/extensions/-/merge_requests/300>`__,
+`MR
+extensions#352 <https://gitlab.com/inkscape/extensions/-/merge_requests/352>`__,
+`MR
+extensions#403 <https://gitlab.com/inkscape/extensions/-/merge_requests/403>`__
+
+Inkex now exposes styles to extensions authors as intended by the SVG
+specification. This means:
+
+- ``BaseElement`` now has functions ``cascaded_style``,
+ ``specified_style`` and ``presentation_style``.
+- In most use cases, extensions querying a style will use
+ ``specified_style``. This computes the `effective
+ style <https://www.w3.org/TR/CSS22/cascade.html#specified-value>`__
+ of the element, including CSS classes / pseudo-selectors, inherited
+ styles, presentation attributes etc.
+- While ``style.get()`` and ``style[key]`` has been unchaged, a new
+ getter has been added in form of ``style(key)`` (similar to a
+ function call), which attempts to parse the attribute in a reasonable
+ datatype. If the attribute is unset, the (parsed) default value will
+ be returned. For example:
+
+ - ``style("fill")`` returns a ``Color`` / ``Gradient`` / ``Pattern``
+ / ``None``,
+ - ``style("opacity")`` returns a value between 0 and 1, regardless
+ if opacity is defined as percentage or as float, is out of bounds
+ or undefined,
+ - ``style("stroke-dasharray")`` returns a list of floats of
+ dash/gap/dash/gap in user units.
+
+- Not for all attributes there is a parser defined - in that case, a
+ string will be returned. Additional parsers may be added in the
+ future, so if you handle the string value, typecheck it first!
+
+.. _using_the_new_style_api_in_your_extension:
+
+Using the new Style API in your extension
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The following calls can probably be simplified:
+
++----------------------------------------------------+----------------------------------------------------+
+| Old code (pre-1.2) | New code (1.2+) |
++====================================================+====================================================+
+| .. code:: python3 | .. code:: python3 |
+| | |
+| if "fill-opacity" in self.style: | alpha = self.style("fill-opacity") |
+| alpha = self.style["fill-opacity"] | |
+| else: | |
+| alpha = 1 | |
++----------------------------------------------------+----------------------------------------------------+
+| .. code:: python3 | .. code:: python3 |
+| | |
+| if not node.style.get(attr, '')\ | marker_node = node.style(attr) |
+| .startswith('url(#'): | |
+| continue | |
+| | |
+| marker_id = node.style[attr][5:-1] | |
+| marker_node = self.svg.getElement( | |
+| f'/svg:svg//svg:marker[@id="{marker_id}"]') | |
++----------------------------------------------------+----------------------------------------------------+
+| .. code:: python3 | .. code:: python3 |
+| | |
+| obj.style['fill'] = pattern.get_id(2) | obj.style['fill'] = pattern |
++----------------------------------------------------+----------------------------------------------------+
+
+Checkout `MR
+extensions#298 <https://gitlab.com/inkscape/extensions/-/merge_requests/298>`__
+for additional examples of simplifications.
+
+.. _new_units_api:
+
+New Units API
+-------------
+
+Added in `MR
+extensions#329 <https://gitlab.com/inkscape/extensions/-/merge_requests/329>`__,
+`MR
+extensions#343 <https://gitlab.com/inkscape/extensions/-/merge_requests/343>`__,
+`MR
+extensions#415 <https://gitlab.com/inkscape/extensions/-/merge_requests/415>`__
+
+The existing functions ``unittouu`` and ``uutounit`` are widely used,
+but for different purposes. Different extension authors try to answer
+different questions using these function, and, inevitably, some answers
+were incorrect (see linked issues in `MR
+extensions#329 <https://gitlab.com/inkscape/extensions/-/merge_requests/329>`__).
+
+In Inkscape 1.2, new methods have been added to make working with
+dimensional values easier. These are ``to_dimensionless``,
+``to_dimensional``, ``viewport_to_unit`` and ``unit_to_viewport``. The
+existing functions ``unittouu`` and ``uutounit`` are not deprecated, but
+discouraged; in most cases, the new functions are more reliable.
+
+- ``to_dimensionless(value)`` fulfills the following task: **Convert
+ this string from the XML into a number, while processing the unit.
+ When using this function on any SVG attribute and replace the
+ original value with the result, the output doesn't change visually.**
+- ``viewport_to_unit(value, target_unit="px")`` answers the following
+ questions:
+
+ - **What is the length (e.g. the length of a rectangle, without a
+ unit) of an object that has size** ``value`` **on the viewport?** This
+ is relevant because in Inkscape toolbars / tools, all dimensions
+ are shown in "viewport units".
+ - In other words: **What is the SVG representation of entering
+ ``value`` in the width/height widget of the selection tool (set to
+ the unit of value)?** Consider ``<svg width="210mm" viewBox="0 0 105 147.5"><rect width="100" height="100"/></svg>``
+ , i.e. a "mm-based" SVG with scale=2. When typing ``200`` in the
+ rectangle tool, set to mm, the XML editor shows ``100`` =
+ ``100px``. That's what ``viewport_to_unit("200mm") = 100`` does.
+
+ - Note that this is different than
+ ``viewport_to_unit("200", "mm")``, which would be for a rectangle
+ with a width (in the width/height widget of the rectangle tool) of
+ 200 (px), while writing the width in ``mm`` *in the SVG*: \
+ ``<rect width="7.00043mm" height="7.00043mm"/>``.
+
+- ``to_dimensional`` simply converts a float to its equivalent with
+ attached unit. It's the opposite of ``to_dimensionless``.
+- ``unit_to_viewport(value, unit="px")`` answers the following
+ question: **What does the the width/height widget of the selection
+ tool (set to** ``unit`` **) show when selecting an element with width
+ ``value`` as defined in the SVG?** Consider again ``<svg width="210mm" viewBox="0 0 105 147.5"><rect width="100" height="100"/></svg>``
+ , i.e. a "mm-based" document with scale=2. To create this rectangle,
+ one has to type ``viewport_to_unit("100", unit="mm") = 200`` into the
+ rectangle tool, if the rectangle tool is set to mm.
+
+With the same spirit, the functions for width/height of the document
+have been updated. ``svg.width`` and ``svg.height`` have been
+deprecated, and replaced with ``svg.viewbox_width``,
+``svg.viewport_width``, ``svg.viewbox_height`` and
+``svg.viewport_height``.
+
+There is also ``svg.scale``, which returns the ratio of the viewport and
+viewbox width, and ``svg.inkscape_scale`` which is the scale reported in
+the Document properties dialog.
+
+See :ref:`units` for additional information.
+
+.. _other_additions_to_inkex:
+
+Other additions to inkex
+------------------------
+
+- The path conversion for arcs and stars have been added, so when
+ extensions create these objects, they are rendered in a browser as
+ well and can be processed further by the same extension. (`MR
+ extensions#387 <https://gitlab.com/inkscape/extensions/-/merge_requests/387>`__,
+ `Issue
+ extensions#240 <https://gitlab.com/inkscape/extensions/-/issues/240>`__)
+- ``ColorExtension``\ s can now process in RGBA space. Previously,
+ opacity and color were processed independently. By setting the class
+ variable ``pass_rgba = True``, the ``modify_color`` method gets
+ passed a color with alpha channel computed from matching property
+ pairs, e.g. ``fill`` and ``fill-opacity``. (This value takes CSS
+ styling and style inheritance into account. (`MR
+ extensions#392 <https://gitlab.com/inkscape/extensions/-/merge_requests/392>`__
+ , `Issue
+ extensions#419 <https://gitlab.com/inkscape/extensions/-/issues/419>`__).
+- API functions for the new `multipage
+ feature <Release_notes/1.2#Page_tool>`__ have been added: `MR
+ extensions#499 <https://gitlab.com/inkscape/extensions/-/merge_requests/399>`__.
+
+.. _other_deprecations_to_inkex_1_2
+
+Other deprecations to inkex
+----------------------------
+
+- Pre Inkscape 1.0 way of declaring the dependency on inkex in the ``*.inx`` file has been removed entirely. (It was deprecated in Inkscape 1.0. For details, see :ref:`remove_dependency_listings`)
+
diff --git a/share/extensions/docs/authors/widgets/bool.png b/share/extensions/docs/authors/widgets/bool.png
new file mode 100644
index 0000000..dbf5588
--- /dev/null
+++ b/share/extensions/docs/authors/widgets/bool.png
Binary files differ
diff --git a/share/extensions/docs/authors/widgets/color.png b/share/extensions/docs/authors/widgets/color.png
new file mode 100644
index 0000000..1d6e894
--- /dev/null
+++ b/share/extensions/docs/authors/widgets/color.png
Binary files differ
diff --git a/share/extensions/docs/authors/widgets/float.png b/share/extensions/docs/authors/widgets/float.png
new file mode 100644
index 0000000..63ac125
--- /dev/null
+++ b/share/extensions/docs/authors/widgets/float.png
Binary files differ
diff --git a/share/extensions/docs/authors/widgets/image.png b/share/extensions/docs/authors/widgets/image.png
new file mode 100644
index 0000000..057b1d0
--- /dev/null
+++ b/share/extensions/docs/authors/widgets/image.png
Binary files differ
diff --git a/share/extensions/docs/authors/widgets/integer.png b/share/extensions/docs/authors/widgets/integer.png
new file mode 100644
index 0000000..da376db
--- /dev/null
+++ b/share/extensions/docs/authors/widgets/integer.png
Binary files differ
diff --git a/share/extensions/docs/authors/widgets/label.png b/share/extensions/docs/authors/widgets/label.png
new file mode 100644
index 0000000..fb1e470
--- /dev/null
+++ b/share/extensions/docs/authors/widgets/label.png
Binary files differ
diff --git a/share/extensions/docs/authors/widgets/notebook.png b/share/extensions/docs/authors/widgets/notebook.png
new file mode 100644
index 0000000..f21dcec
--- /dev/null
+++ b/share/extensions/docs/authors/widgets/notebook.png
Binary files differ
diff --git a/share/extensions/docs/authors/widgets/optiongroup.png b/share/extensions/docs/authors/widgets/optiongroup.png
new file mode 100644
index 0000000..a8d9d7d
--- /dev/null
+++ b/share/extensions/docs/authors/widgets/optiongroup.png
Binary files differ
diff --git a/share/extensions/docs/authors/widgets/path.png b/share/extensions/docs/authors/widgets/path.png
new file mode 100644
index 0000000..3050182
--- /dev/null
+++ b/share/extensions/docs/authors/widgets/path.png
Binary files differ
diff --git a/share/extensions/docs/authors/widgets/separator.png b/share/extensions/docs/authors/widgets/separator.png
new file mode 100644
index 0000000..e4e7e2e
--- /dev/null
+++ b/share/extensions/docs/authors/widgets/separator.png
Binary files differ
diff --git a/share/extensions/docs/authors/widgets/spacer.png b/share/extensions/docs/authors/widgets/spacer.png
new file mode 100644
index 0000000..32ab128
--- /dev/null
+++ b/share/extensions/docs/authors/widgets/spacer.png
Binary files differ
diff --git a/share/extensions/docs/authors/widgets/string.png b/share/extensions/docs/authors/widgets/string.png
new file mode 100644
index 0000000..b95ffff
--- /dev/null
+++ b/share/extensions/docs/authors/widgets/string.png
Binary files differ
diff --git a/share/extensions/docs/conf.py b/share/extensions/docs/conf.py
new file mode 100644
index 0000000..62e2884
--- /dev/null
+++ b/share/extensions/docs/conf.py
@@ -0,0 +1,93 @@
+# Configuration file for the Sphinx documentation builder.
+#
+# This file only contains a selection of the most common options. For a full
+# list see the documentation:
+# https://www.sphinx-doc.org/en/master/usage/configuration.html
+
+# -- Path setup --------------------------------------------------------------
+
+# If extensions (or modules to document with autodoc) are in another directory,
+# add these directories to sys.path here. If the directory is relative to the
+# documentation root, use os.path.abspath to make it absolute, like shown here.
+#
+import os
+import sys
+
+sys.path.insert(0, os.path.abspath("../"))
+
+import datetime
+
+# -- Project information -----------------------------------------------------
+
+project = "inkex documentation"
+copyright = f"{datetime.datetime.now().year} The Inkscape Project"
+author = "The Inkscape Project"
+
+
+# -- General configuration ---------------------------------------------------
+
+# Add any Sphinx extension module names here, as strings. They can be
+# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
+# ones.
+extensions = [
+ "sphinx.ext.autodoc",
+ "sphinx.ext.viewcode",
+ "sphinx.ext.todo",
+ "sphinx.ext.napoleon",
+]
+
+# Add any paths that contain templates here, relative to this directory.
+templates_path = ["_templates"]
+
+# The language for content autogenerated by Sphinx. Refer to documentation
+# for a list of supported languages.
+#
+# This is also used if you do content translation via gettext catalogs.
+# Usually you set "language" from the command line for these cases.
+language = "en"
+
+# List of patterns, relative to source directory, that match files and
+# directories to ignore when looking for source files.
+# This pattern also affects html_static_path and html_extra_path.
+exclude_patterns = ["_build", "Thumbs.db", ".DS_Store"]
+
+
+# -- Options for HTML output -------------------------------------------------
+
+# The theme to use for HTML and HTML Help pages. See the documentation for
+# a list of builtin themes.
+#
+html_theme = "pydata_sphinx_theme"
+
+html_theme_options = {
+ "show_toc_level": 2,
+ "use_edit_page_button": True,
+ "gitlab_url": "https://gitlab.com/inkscape/extensions",
+}
+
+html_context = {
+ "gitlab_user": "inkscape",
+ "gitlab_repo": "extensions",
+ "gitlab_version": "master",
+ "doc_path": "docs",
+}
+
+# Add any paths that contain custom static files (such as style sheets) here,
+# relative to this directory. They are copied after the builtin static files,
+# so a file named "default.css" will overwrite the builtin "default.css".
+# html_static_path = ["_static"]
+
+# -- Extension configuration -------------------------------------------------
+
+always_document_param_types = True
+
+# -- Options for todo extension ----------------------------------------------
+
+# If true, `todo` and `todoList` produce output, else they produce nothing.
+todo_include_todos = True
+
+autodoc_member_order = "bysource"
+
+autodoc_preserve_defaults = True
+
+html_favicon = "favicon.svg"
diff --git a/share/extensions/docs/dev/getting-started.rst b/share/extensions/docs/dev/getting-started.rst
new file mode 100644
index 0000000..63d8a46
--- /dev/null
+++ b/share/extensions/docs/dev/getting-started.rst
@@ -0,0 +1,148 @@
+Getting started with developing inkex
+=====================================
+
+.. highlight:: bash
+
+.. warning::
+
+ This document is tailored for contributors to the inkex package and core extensions.
+
+ Extension authors should look here: :ref:`authors-tutorial`
+
+Repository setup
+----------------
+
+It is possible to synchronize a fork with the extensions repository - whenever a branch in the
+mirrored repository is updated, your fork will be updated too (usually with a delay of up to one
+hour). See `Settings -> Repository -> Mirroring Repositories` and add a "Pull" mirror.
+
+.. warning::
+
+ If you use this method, **do not** add commits to branches that should be synced
+ (such as `master`).
+ Depending on the exact settings of the mirroring option, you will either lose your changes,
+ lose the synchronisation or run into a messed up branch history.
+
+Always check out submodules as well::
+
+ git submodule update && git submodule init
+
+Python setup
+------------
+
+On every operating system, you need a working Python environment. Currently, inkex is tested
+against Python 3.7-3.10.
+
+inkex manages its dependencies using `poetry <https://python-poetry.org/docs/>`_. It can be installed using::
+
+ pip install poetry
+
+Install the dependencies and the pre-commit hook::
+
+ poetry install
+ pre-commit install
+
+Testing changes in Inkscape
+---------------------------
+
+Most of the time, calling the python file of the extension directly and through unit tests is
+sufficient. In some cases, the interaction between Inkscape and the extension should be tested,
+though.
+
+Assuming you have managed to make Inkscape look in the correct folder for the extensions (see hints
+for different operating systems below), the python
+file of an extension is reloaded every time the extension is run. For changes to the inx file or
+the command line parameters of the extension (as defined in the
+:func:`~inkex.base.InkscapeExtension.add_arguments` method) you need to restart Inkscape.
+
+Developing extensions on Windows
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+
+.. highlight:: batch
+
+To test extensions with a given Inkscape version, download the 7z archive of that version,
+unarchive it and delete the ``inkscape\share\extensions`` folder. Next, create a symlink in that
+folder from an administrative command prompt::
+
+ cd [directory of the unzipped Inkscape folder]
+ mklink /D share\extensions C:\path\to\your\fork
+
+If you start ``bin\inkscape`` now, the extensions are loaded from your fork.
+
+Developing extensions on Linux
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. highlight:: bash
+
+A very similar path to Windows can be used when working off an appimage build.
+
+Extract the appimage into a new folder called ``squashfs-root``::
+
+ /path/to/appimage --appimage-extract
+ squashfs-root/AppRun --system-data-directory
+
+This prints the location of the extensions folder. Create a symlink to your repo there and run::
+
+ squashfs-root/AppRun
+
+Trying / Changing a merge request locally
+-----------------------------------------
+
+Add this to ``git config -e`` (only once)::
+
+ [remote "upstream"]
+ url = git@gitlab.com:inkscape/extensions.git
+ fetch = +refs/merge-requests/*/head:refs/remotes/origin/merge-requests/*
+ [alias]
+ mr = !sh -c 'git fetch $1 merge-requests/$2/head:mr-$1-$2 && git checkout mr-$1-$2' -
+
+Check out the merge request !123::
+
+ git mr upstream 123
+
+Push changes to the source branch ``source-branch-name`` of fork in the namespace (typically the
+author's username) ``xyz``::
+
+ git push git@gitlab.com:xyz/extensions.git mr-origin-123:source-branch-name
+
+
+Adding/Updating dependencies
+----------------------------
+
+.. highlight:: bash
+
+The *direct* dependencies of inkex are declared in the ``pyproject.toml`` file.
+
+There is also a lockfile named ``poetry.lock`` which has *all* the dependencies
+(direct, dependencies of direct, dependencies of dependencies of direct and so on till the leaf dependencies)
+pinned to specific versions (versions which were compatible the last time lockfile was updated).
+
+To update all the dependencies in the lockfile to latest compatible versions, enter::
+
+ poetry lock
+
+To add/update a particular dependency, add it to ``pyproject.toml`` manually. The dependency should be declared in the
+``[tool.poetry.dependencies]`` TOML table, while a dependency required only during development of inkex should be declared in
+``[tool.poetry.dev-dependencies]``.
+
+Then update the lockfile using::
+
+ poetry lock
+
+Alternatively, you can add a dependency and update the lockfile in a single command::
+
+ poetry add "lxml@^4.5.0" --lock
+
+Both the ``pyproject.toml`` and ``poetry.lock`` are to be committed to the repository.
+
+.. note::
+
+ You don't need to install the dependencies to add/update them. So, the commands above don't install anything.
+ However, if you are using poetry to manage the environment, and want to also install the dependencies,
+ remove the ``--lock`` options from the commands and use ``poetry update`` instead of ``poetry lock``.
+
+.. note::
+
+ Dependencies should be updated according to the `policy <https://wiki.inkscape.org/wiki/Tracking_Dependencies#Distros>`_ defined in Inkscape wiki .
+
diff --git a/share/extensions/docs/dev/index.rst b/share/extensions/docs/dev/index.rst
new file mode 100644
index 0000000..a38cf03
--- /dev/null
+++ b/share/extensions/docs/dev/index.rst
@@ -0,0 +1,8 @@
+inkex (and core Extensions) development
+=======================================
+
+.. toctree::
+ :maxdepth: 2
+
+ getting-started
+ Writing unit tests <../authors/unit-tests> \ No newline at end of file
diff --git a/share/extensions/docs/favicon.svg b/share/extensions/docs/favicon.svg
new file mode 100644
index 0000000..cf0292a
--- /dev/null
+++ b/share/extensions/docs/favicon.svg
@@ -0,0 +1,159 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Wikimedia Commons, User:Sven. Hand edited. :)-->
+
+<svg
+ xmlns:dc="http://purl.org/dc/elements/1.1/"
+ xmlns:cc="http://creativecommons.org/ns#"
+ xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+ xmlns:svg="http://www.w3.org/2000/svg"
+ xmlns="http://www.w3.org/2000/svg"
+ xmlns:xlink="http://www.w3.org/1999/xlink"
+ xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+ xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+ width="128"
+ height="128"
+ viewBox="0 0 96.000001 96.000003"
+ id="svg2"
+ version="1.1"
+ inkscape:version="0.92.2 (unknown)"
+ sodipodi:docname="addons2.svg"
+ inkscape:export-filename="/home/doctormo/Desktop/addons.png"
+ inkscape:export-xdpi="152"
+ inkscape:export-ydpi="152">
+ <metadata
+ id="metadata57">
+ <rdf:RDF>
+ <cc:Work
+ rdf:about="">
+ <dc:format>image/svg+xml</dc:format>
+ <dc:type
+ rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+ <dc:title></dc:title>
+ </cc:Work>
+ </rdf:RDF>
+ </metadata>
+ <defs
+ id="defs55">
+ <clipPath
+ id="clipPath712">
+ <path
+ id="path714"
+ inkscape:connector-curvature="0"
+ d="m 3711.8,1621 c 1.65,2.4 3.19,5 4.64,7.76 l 0.61,0 c 1.34,0 2.67,0.06 3.99,0.19 -2.82,-3.21 -5.89,-5.89 -9.24,-7.95 m -582.76,582.77 c 2.06,3.35 4.74,6.42 7.95,9.24 -0.15,-1.52 -0.21,-3.05 -0.19,-4.6 -2.76,-1.45 -5.36,-2.99 -7.76,-4.64" />
+ </clipPath>
+ <linearGradient
+ id="linearGradient11554"
+ gradientUnits="userSpaceOnUse"
+ inkscape:collect="always"
+ gradientTransform="matrix(152.32,152.32,152.32,-152.32,223.42,72.625)">
+ <stop
+ id="stop718"
+ style="stop-color:#c14d9d"
+ offset="0" />
+ <stop
+ id="stop720"
+ style="stop-color:#da45a4"
+ offset="1" />
+ </linearGradient>
+ <clipPath
+ id="clipPath680">
+ <path
+ id="path682"
+ inkscape:connector-curvature="0"
+ d="m 3752.3,753.38 -13.46,0 0,12.73 13.46,-0.007 0,-12.72" />
+ </clipPath>
+ <clipPath
+ id="clipPath114">
+ <path
+ id="path116"
+ inkscape:connector-curvature="0"
+ d="m 3217.1,1932.8 c 19.99,128.64 -54.89,140.42 -95.98,231.75 -5.9,13.11 -7.38,25.56 -3.18,36.77 -1.62,-4.35 -2.39,-8.88 -2.39,-13.56 0.01,-7.4 1.97,-15.18 5.58,-23.21 36.39,-80.89 99.29,-99.38 99.3,-191.94 0,-11.94 -1.05,-25.11 -3.33,-39.81" />
+ </clipPath>
+ <clipPath
+ id="clipPath98">
+ <path
+ id="path100"
+ inkscape:connector-curvature="0"
+ d="m 3175.4,1839.8 c 20.92,24.68 35.84,55.66 41.66,92.98 -5.8,-37.25 -20.66,-68.2 -41.53,-92.87 -0.04,-0.03 -0.09,-0.08 -0.13,-0.11" />
+ </clipPath>
+ <linearGradient
+ inkscape:collect="always"
+ xlink:href="#linearGradient11554"
+ id="linearGradient16646"
+ gradientUnits="userSpaceOnUse"
+ gradientTransform="matrix(152.32,152.32,152.32,-152.32,223.42,72.625)" />
+ </defs>
+ <sodipodi:namedview
+ pagecolor="#525252"
+ bordercolor="#666666"
+ borderopacity="1"
+ objecttolerance="10"
+ gridtolerance="10"
+ guidetolerance="10"
+ inkscape:pageopacity="0"
+ inkscape:pageshadow="2"
+ inkscape:window-width="3102"
+ inkscape:window-height="1764"
+ id="namedview53"
+ showgrid="false"
+ units="px"
+ inkscape:zoom="5.6568542"
+ inkscape:cx="107.83079"
+ inkscape:cy="42.285295"
+ inkscape:window-x="98"
+ inkscape:window-y="36"
+ inkscape:window-maximized="1"
+ inkscape:current-layer="svg2" />
+ <style
+ type="text/css"
+ id="style26">
+ .specularity {opacity:0.5;}
+ .low-specularity {opacity:0.25;}
+ .full-specularity {opacity:1;}
+ .black {fill:#000000;}
+ .white {fill:#ffffff;}
+ .outline-big {stroke-width:16;stroke:none;opacity:0.1;fill:none;}
+ .outline-small {stroke-width:8;stroke:none;opacity:0.2;fill:none;}
+ .stroke-highlight {fill:none;stroke:none;opacity:0.2;}
+ .base-shadow {fill:black;opacity:75;}
+ </style>
+ <style
+ type="text/css"
+ id="style26-3" />
+ <path
+ style="color:#000000;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:medium;line-height:normal;font-family:sans-serif;text-indent:0;text-align:start;text-decoration:none;text-decoration-line:none;text-decoration-style:solid;text-decoration-color:#000000;letter-spacing:normal;word-spacing:normal;text-transform:none;writing-mode:lr-tb;direction:ltr;baseline-shift:baseline;text-anchor:start;white-space:normal;clip-rule:nonzero;display:inline;overflow:visible;visibility:visible;opacity:1;isolation:auto;mix-blend-mode:normal;color-interpolation:sRGB;color-interpolation-filters:linearRGB;solid-color:#000000;solid-opacity:1;fill:#ffffff;fill-opacity:1;fill-rule:nonzero;stroke:none;stroke-width:7.83048964;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1;color-rendering:auto;image-rendering:auto;shape-rendering:auto;text-rendering:auto;enable-background:accumulate"
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+ id="path18660"
+ inkscape:connector-curvature="0"
+ sodipodi:nodetypes="ccccccccccccccccc" />
+ <path
+ style="color:#000000;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:medium;line-height:normal;font-family:sans-serif;text-indent:0;text-align:start;text-decoration:none;text-decoration-line:none;text-decoration-style:solid;text-decoration-color:#000000;letter-spacing:normal;word-spacing:normal;text-transform:none;writing-mode:lr-tb;direction:ltr;baseline-shift:baseline;text-anchor:start;white-space:normal;clip-rule:nonzero;display:inline;overflow:visible;visibility:visible;opacity:1;isolation:auto;mix-blend-mode:normal;color-interpolation:sRGB;color-interpolation-filters:linearRGB;solid-color:#000000;solid-opacity:1;fill:#292929;fill-opacity:1;fill-rule:nonzero;stroke:none;stroke-width:7.83048916;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1;color-rendering:auto;image-rendering:auto;shape-rendering:auto;text-rendering:auto;enable-background:accumulate"
+ d="m 47.737292,4.7551571 c -2.455633,-0.00335 -4.890607,0.9015902 -6.685859,2.7390881 L 14.363492,34.131977 V 72.97867 h 26.649623 c 3.830026,0.596821 5.287844,2.802384 2.667737,6.376671 -1.384296,1.217014 -2.326482,2.940582 -2.330801,4.910008 -0.0077,3.759915 3.034292,6.816344 6.794206,6.824597 3.75966,0.0089 6.816358,-3.035612 6.824598,-6.795527 0.0039,-1.581777 -0.649992,-2.985692 -1.565759,-4.15554 -3.943754,-4.99205 -1.382209,-6.718824 2.908216,-7.160209 h 25.599175 v -8.470958 c -0.460943,-4.472918 -1.230254,-6.207509 -4.989289,-2.787977 -1.421701,1.112885 -3.126766,1.899007 -5.048747,1.894767 -4.568836,-0.01028 -7.804473,-3.933832 -7.794443,-8.502669 0.01028,-4.568836 3.388373,-8.266925 7.956966,-8.256904 2.393412,0.0054 4.551613,1.28276 6.030486,2.965033 2.349214,1.948259 3.183464,0.616466 3.845027,-1.671464 V 34.131977 L 54.553962,7.4797108 54.539427,7.463855 C 52.66928,5.6683854 50.194248,4.7585896 47.738614,4.7551571 Z"
+ id="path5071"
+ inkscape:connector-curvature="0" />
+ <g
+ id="g676"
+ transform="matrix(0.01478013,0,0,-0.01478013,-8.9217291,58.409986)"
+ style="stroke-width:1.10862482">
+ <g
+ id="g678"
+ clip-path="url(#clipPath680)"
+ style="stroke-width:1.10862482">
+ <path
+ id="path690"
+ style="fill:url(#linearGradient16646);stroke-width:1.10862482"
+ inkscape:connector-curvature="0"
+ d="m 3752.3,753.38 h -13.46 v 12.73 l 13.46,-0.007 v -12.72" />
+ </g>
+ </g>
+ <path
+ inkscape:connector-curvature="0"
+ style="color:#000000;fill:#292929;fill-opacity:1;stroke-width:0.74702454"
+ d="m 47.740569,6.0208323 c -2.140885,-0.00428 -4.26097,0.7727567 -5.797302,2.3452439 L 16.383791,34.521732 c -0.184691,0.228716 -0.344181,0.444029 -0.508005,0.661985 h 26.172767 c 1.596627,-0.04836 3.106093,0.205077 4.141681,1.181834 0.521808,0.49225 0.870407,1.302601 0.743586,2.095189 -0.123203,0.769765 -0.578894,1.442472 -1.260804,2.099138 -0.002,0.0025 -6.74e-4,0.006 -0.0027,0.0079 -1.768925,1.953228 -1.021573,5.549029 1.499009,6.451394 l 0.06711,0.02237 0.0632,0.03291 c 2.745641,1.422255 6.626147,-1.569717 5.752553,-4.564145 -0.06658,-0.213566 -0.353228,-0.693745 -0.738315,-1.214735 -0.387985,-0.524971 -0.853945,-1.106784 -1.234477,-1.747747 -0.380525,-0.640928 -0.742991,-1.39634 -0.561961,-2.301814 0.181045,-0.905578 0.966091,-1.607911 2.003061,-2.007012 l 0.08818,-0.03291 0.09213,-0.01842 c 3.015225,-0.58108 16.224885,-0.350826 27.075602,-0.13165 L 53.6629,8.3660762 C 52.042852,6.8107123 49.881454,6.0251131 47.740569,6.0208323 Z"
+ id="path12081" />
+ <path
+ inkscape:connector-curvature="0"
+ style="fill:#ffffff;stroke-width:5.34909868"
+ id="path2317"
+ d="m 52.118338,10.200681 10.112246,10.270157 c 0.958896,0.979832 0.945582,2.878613 0.409051,3.424655 l -5.020922,-4.016359 -0.98744,5.947484 -4.195201,-2.21461 -6.718031,4.244668 -2.224124,-8.94786 -3.609207,6.244286 h -5.517499 c -2.248856,0 -2.513315,-2.853878 -0.469938,-4.897255 3.569251,-3.852737 7.665518,-7.779674 9.89154,-10.055166 2.237447,-2.2869087 6.135841,-2.2222207 8.329525,0 z" />
+</svg>
diff --git a/share/extensions/docs/index.rst b/share/extensions/docs/index.rst
new file mode 100644
index 0000000..abfc319
--- /dev/null
+++ b/share/extensions/docs/index.rst
@@ -0,0 +1,35 @@
+Welcome to inkex's documentation!
+=================================
+
+.. toctree::
+ :maxdepth: 1
+ :hidden:
+
+ Tutorial <tutorial/index>
+ authors/index
+ Inkex Development <dev/index>
+ API Reference <source/index>
+
+**Useful links**:
+`Source Repository <https://gitlab.com/inkscape/extensions>`_ |
+`Issue Tracker <https://gitlab.com/inkscape/extensions/issues>`_ |
+`Chat <https://chat.inkscape.org/channel/inkscape_extensions>`_
+
+Inkex is:
+
+- a general-purpose SVG reading/writing/modification package
+- an object-oriented interface for access to
+ many common SVG attributes, such as paths and styles
+- the Python package that enables Inkscape extensions
+
+Furthermore, :mod:`inkex.gui` provides a way to ship GTK interfaces with extensions, and
+:mod:`inkex.tester` is a package to facilitate unit testing of extensions.
+
+Welcome to its documentation!
+
+Indices and tables
+==================
+
+* :ref:`genindex`
+* :ref:`modindex`
+* :ref:`search`
diff --git a/share/extensions/docs/make.bat b/share/extensions/docs/make.bat
new file mode 100644
index 0000000..21b58de
--- /dev/null
+++ b/share/extensions/docs/make.bat
@@ -0,0 +1,35 @@
+@ECHO OFF
+
+pushd %~dp0
+
+REM Command file for Sphinx documentation
+
+if "%SPHINXBUILD%" == "" (
+ set SPHINXBUILD=sphinx-build
+)
+set SOURCEDIR=.
+set BUILDDIR=build
+
+if "%1" == "" goto help
+
+%SPHINXBUILD% >NUL 2>NUL
+if errorlevel 9009 (
+ echo.
+ echo.The 'sphinx-build' command was not found. Make sure you have Sphinx
+ echo.installed, then set the SPHINXBUILD environment variable to point
+ echo.to the full path of the 'sphinx-build' executable. Alternatively you
+ echo.may add the Sphinx directory to PATH.
+ echo.
+ echo.If you don't have Sphinx installed, grab it from
+ echo.https://www.sphinx-doc.org/
+ exit /b 1
+)
+
+%SPHINXBUILD% -M %1 %SOURCEDIR% %BUILDDIR% %SPHINXOPTS% %O%
+goto end
+
+:help
+%SPHINXBUILD% -M help %SOURCEDIR% %BUILDDIR% %SPHINXOPTS% %O%
+
+:end
+popd
diff --git a/share/extensions/docs/source/index.rst b/share/extensions/docs/source/index.rst
new file mode 100644
index 0000000..b8aad2c
--- /dev/null
+++ b/share/extensions/docs/source/index.rst
@@ -0,0 +1,21 @@
+.. inkex documentation master file, created by
+ sphinx-quickstart on Tue May 18 23:45:21 2021.
+ You can adapt this file completely to your liking, but it should at least
+ contain the root `toctree` directive.
+
+API Reference
+=============
+
+.. toctree::
+ :maxdepth: 4
+ :caption: Contents:
+
+ inkex
+
+
+Indices and tables
+==================
+
+* :ref:`genindex`
+* :ref:`modindex`
+* :ref:`search`
diff --git a/share/extensions/docs/tutorial/index.rst b/share/extensions/docs/tutorial/index.rst
new file mode 100644
index 0000000..0e9551a
--- /dev/null
+++ b/share/extensions/docs/tutorial/index.rst
@@ -0,0 +1,49 @@
+.. _authors-tutorial:
+
+Tutorial
+========
+
+Introduction
+------------
+
+Extensions are small programs that extend Inkscape’s functionality. They
+can provide features for specific tasks, experimentation, or art styles.
+They can also add support for special hardware or different export
+formats. While many extensions are included with Inkscape, you can also
+install extensions written by third parties or write your own.
+
+This guide aims to provide you with enough information to write your own
+extension using the python programming language and a text editor. You
+should have the latest version of Inkscape installed. While Inkscape
+extensions generally work across platforms, this guide will use Linux as
+its default operating system. Linux is not required for writing
+extensions, but you may need to modify the location of files on your
+computer as you follow along. You may also need to use other “helper”
+programs, for example a different text editor, depending on your
+operating system.
+
+When a user selects an extension from the menu within Inkscape, Inkscape
+opens a pop-up dialog that presents information to the user and/or
+allows the user to enter any parameters that are necessary to use the
+extension. An extension can also be configured to run immediately
+without an intermediate dialog, for example if it does not have any
+adjustable parameters. When the user clicks **Apply** in the dialog, the
+parameters are passed to the extension program along with the svg file
+and a list of selected objects. The extension program itself then runs,
+and the data that it returns will be used to update Inkscape’s svg
+canvas or to save data to disk.
+
+We’ve made this process easier for you by creating a set of template
+extensions which you can download as the starting point for this
+tutorial. If you are a beginner we recommend that you start with the
+Effect Extension Template. Input, Output and other types of extensions
+will be covered in the more advanced topics later.
+
+.. toctree::
+ :maxdepth: 1
+
+ my-first-effect-extension
+ simple-path-extension
+ my-first-text-extension
+ my-first-import-extension
+
diff --git a/share/extensions/docs/tutorial/my-first-effect-extension.rst b/share/extensions/docs/tutorial/my-first-effect-extension.rst
new file mode 100644
index 0000000..7666288
--- /dev/null
+++ b/share/extensions/docs/tutorial/my-first-effect-extension.rst
@@ -0,0 +1,130 @@
+.. _first-effect-extension:
+
+My first effect extension
+=========================
+
+Resources
+---------
+
+- :download:`Template Files <resources/template_effect.zip>`
+- :download:`Example solution <resources/make_red_extension.zip>`
+
+Introduction
+------------
+Effect extensions take the svg from Inkscape, modify it in some way and
+pass the modified version back to Inkscape to be rendered onto the
+canvas. This can be very powerful, allowing everything from randomising
+colours to manipulating path elements in external programs.
+
+We are going to write an effect extension that will simply change the fill
+any selected object to red.
+
+Step One
+---------
+
+Extract the ``Effect Extension Template`` files into a folder on your
+computer. You should have two files, one inx file and one python file.
+Move or link these files into your extensions directory as you would
+when installing extensions manually. This is the directory listed at
+``Edit > Preferences > System: User extensions``.
+
+Edit the inx file in a text editor and change the name of the extension
+to ``Make Red Extension`` and the id to
+``org.inkscape.tutorial.make_red_extension`` by changing these lines near
+the top:
+
+.. code:: xml
+
+ <?xml version="1.0" encoding="UTF-8"?>
+ <inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
+ <name>Make Red Extension</name>
+ <id>org.inkscape.tutorial.make_red_extension</id>
+ [...]
+
+Toward the end of the .inx file, change the submenu to ``Color``
+specify that this extension will be listed in the ``Color`` submenu
+under the ``Extensions`` menu:
+
+.. code:: xml
+
+ [...]
+ <effect>
+ <!--object-type>path</object-type-->
+ <effects-menu>
+ <submenu name="Color"/>
+ </effects-menu>
+ </effect>
+ [...]
+
+Step Two
+---------
+
+Next, open ``my_effect_extension.py`` in your text editor. You can see
+this is an inkex extension because it contains a python class that
+inherits from ``inkex.EffectExtension``. Change the class name to
+``MakeRedExtension``:
+
+.. code:: python
+
+ [...]
+ class MakeRedExtension(inkex.EffectExtension):
+ [...]
+
+Reflect this change down in the ``__main__`` section of the code by
+changing the class name to ``MakeRedExtension`` there:
+
+.. code:: python
+
+ [...]
+ if __name__ == '__main__':
+ MakeRedExtension().run()
+
+When a standard inkex-based python effect extension is run, it will call
+a method called :func:`~inkex.base.InkscapeExtension.effect` on your extension's class. So, most of the
+code you need to write will go there. Edit
+``my_effect_extension.py``\ 's ``effect()`` method to look like the
+following, **being sure that the indentation is correct so that**
+``effect()`` **is recognized as a method of the MakeRedExtension class**:
+
+.. code:: python
+
+ for elem in self.svg.selection:
+ elem.style['fill'] = 'red'
+ elem.style['fill-opacity'] = 1
+ elem.style['opacity'] = 1
+
+
+
+Code Explanation
+~~~~~~~~~~~~~~~~
+
+We want to change the color of all selected objects to red. For this we need to loop
+through each of the selected paths. The first line of :func:`inkex.base.InkscapeExtension.effect`
+does this. The :attr:`~inkex.elements._svg.SvgDocumentElement.selection` attribute of ``self.svg``
+contains the currently selected objects.
+
+.. hint::
+ ``self.svg`` contains the SVG document in its current state - passed by Inkscape - and
+ is already parsed for us, so we don't have to manipulate the XML manually. Instead, inkex offers
+ an object-oriented interface to all the SVG element types.
+
+Each element has a ``style`` attribute: it's one of the
+:attr:`~inkex.elements._base.BaseElement.WRAPPED_ATTRS` of each element, so ``elem.style`` is a
+:class:`~inkex.styles.Style` object (you can think of it as a dictionary). And in this dictionary,
+we set the value for ``'fill'`` to ``'red'``. We also set the ``'fill-opacity'`` to ``1``, in case
+the object was transparent previously.
+
+
+Final Step
+------------
+
+That’s it! There’s no need to set, save or do anything else as we’ve
+modified the style in place.
+
+Save your python script, and re-launch Inkscape. If inkscape was already
+open, close it first. You should find your new extension available in
+the ``Effect`` menu.
+
+Draw some shapes in Inkscape. Select some of the shapes and use the extension.
+The fill of all objects should change to red.
+
diff --git a/share/extensions/docs/tutorial/my-first-import-extension.rst b/share/extensions/docs/tutorial/my-first-import-extension.rst
new file mode 100644
index 0000000..6c296bd
--- /dev/null
+++ b/share/extensions/docs/tutorial/my-first-import-extension.rst
@@ -0,0 +1,305 @@
+My first import extension
+=========================
+
+Resources
+---------
+
+:download:`vanillin.smi <resources/vanillin.smi>`
+
+Introduction
+------------
+
+This article will teach you the basics of writing an Import Extension for
+Inkscape using the ``inkex`` Extensions API.
+
+Import Extensions are used to add support for a file format that
+Inkscape does not support out of the box. It is rather complex to implement an entire file format,
+but often there are already tools available to convert the file to a format that Inkscape can read,
+such as SVG or PDF. In this case, the extension depends on external programs that convert that
+specific file format to a svg that Inkscape can then read.
+
+The way these extensions are used is not through the ``Extensions`` menu
+but instead these provide options in\ ``File``>\ ``Open`` or
+``File``>\ ``Import`` dialog.
+
+The general flow of a Import Extension is as follows:
+
+1) You select the specific file format from the File Format drop down
+ menu of the ``File``>\ ``Open`` or ``File``>\ ``Import``\ dialog.
+2) You select one or more files of that specific file format. You click
+ on ``Open`` button.
+3) Inkscape will then either open the svg file in a new window or will
+ import it depending on which dialog of ``File`` menu was used.
+
+.. hint::
+
+ You can entirely skip 1) and 2) and just double click on
+ the file. If your extension is set up correctly, you won’t notice the
+ difference between opening a regular file and your file.
+
+In this article we will create an extension named
+``Organic Bond Visualizer``. It will produce the bond structure of an
+organic compound given a
+`SMILES <https://en.wikipedia.org/wiki/Simplified_molecular-input_line-entry_system>`__
+file. The extension uses an external program called ``indigo-depict``
+which has its GitHub repository
+`here <https://github.com/epam/Indigo>`__. (It is a part of the
+``indigo-utils`` package in Debian/Ubuntu repositories. For other
+platforms you might need to build it from source.)
+
+.. note:: A note on **PATH**
+
+ Since the extension depends on external programs, it is important that
+ these external programs can be found by our extensions. For that to
+ happen, either these programs **should** be on your *system PATH* or an
+ absolute path for the program should be used in the code.
+
+ Depending on the operating system, the steps required for adding
+ programs to the PATH might vary.
+
+ You can get away with setting the PATH variable entirely by using an
+ absolute path for the program but it is almost always a bad idea to
+ hard-code paths in the code.
+
+.. hint::
+
+ This article assumes you create all extension related files in the
+ User Extensions directory which is listed at
+ ``Edit``>\ ``Preferences``>\ ``System`` - ``User Extensions:`` in
+ Inkscape.
+
+Step 0 : The Boilerplate
+------------------------
+
+Like any other Inkscape extension, this extension will also have two
+files. So, create a ``organic_bond_vis.inx`` file and a
+``organic_bond_vis.py`` file.
+
+- ``organic_bond_vis.inx`` - It will have the necessary information for
+ Inkscape to be able to recognize your extension as a valid Inkscape
+ extension. It will also have the info required to present the
+ extension as an option in ``File``>\ ``Open`` or
+ ``File``>\ ``Import`` dialog.
+- ``organic_bond_vis.py`` - It will have the actual Python code your
+ extension will execute.
+
+.. hint::
+
+ There is another file that is worth mentioning here - the **test**
+ file which in our case will be ``test_organic_bond_vis.py``. It is
+ not required to be present for an extension per se, but as a best
+ practice, the extension code should always be accompanied by test
+ code.
+
+Step 1 : Populate the ``*.inx`` file
+------------------------------------
+
+.. code:: xml
+
+ <?xml version="1.0" encoding="UTF-8"?>
+ <inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
+ <name>Organic Bond Visualizer</name>
+ <id>org.inkscape.input.bondvisualizer</id>
+ <dependency type="executable" location="path">indigo-depict</dependency>
+ <input>
+ <extension>.smi</extension>
+ <mimetype>chemical/x-daylight-smiles</mimetype>
+ <filetypename>SMILES(*.smi)</filetypename>
+ <filetypetooltip>SMILES</filetypetooltip>
+ </input>
+ <script>
+ <command location="inx" interpreter="python">organic_bond_vis.py</command>
+ </script>
+ </inkscape-extension>
+
+The lines below help Inkscape uniquely identify our extension. You
+should modify these two lines for your own extension:
+
+.. code:: xml
+
+ [...]
+ <name>Organic Bond Visualizer</name>
+ <id>org.inkscape.input.bondvisualizer</id>
+ [...]
+
+Now we declare the dependency of our extension:
+
+.. code:: xml
+
+ <dependency type="executable" location="path">indigo-depict</dependency>
+
+The ``<input>`` tag is what specifies that this extension should add a
+new format in the list of available file formats Inkscape can
+open/import.
+
+.. code:: xml
+
+ [...]
+ <input>
+ <extension>.smi</extension>
+ <mimetype>chemical/x-daylight-smiles</mimetype>
+ <filetypename>SMILES(*.smi)</filetypename>
+ <filetypetooltip>SMILES</filetypetooltip>
+ </input>
+ [...]
+
+Inside the ``<extension>`` tag we declare the suffix of our new format
+(including ``.``)
+
+Some more examples of suffixes could be ``.ps`` , ``.fig``, etc. The
+text inside ``<filetypename>`` is what appears in the
+``File``>\ ``Open`` or ``File``>\ ``Import`` dialogs.
+
+Towards the end, we add the name of our ``.py`` file inside the
+``<command>`` tag.
+
+.. code:: xml
+
+ [...]
+ <script>
+ <command location="inx" interpreter="python">organic_bond_vis.py</command>
+ </script>
+ [...]
+
+Now
+
+- Save the file
+- Close any open Inkscape windows
+- Relaunch Inkscape
+
+You should now see a ``SMILES(*.smi)`` option in the drop down menu.
+
+.. figure:: resources/Smiles_Format.gif
+ :alt: Smiles_Format
+
+ Smiles_Format
+
+If you were to select the ``vanillin.smi`` file and open it, you would
+get an error saying:
+
+.. figure:: resources/Call_Extension_Failure.png
+ :alt: Call_Extension_Failure
+
+ Call_Extension_Failure
+
+This is because we haven’t written anything in the ``.py`` file of our
+extension.
+
+Step 2 : Write the code in ``*.py`` file
+----------------------------------------
+
+First Things First
+~~~~~~~~~~~~~~~~~~
+
+To be able to use any extension functionality, you need to import the
+``inkex`` module.
+
+.. code:: python
+
+ import inkex
+
+There is a specialized class for input extensions that only call an external program to
+convert the file. Every Call Extension inherits from the :class:`~inkex.extensions.CallExtension`
+class provided by the ``inkex`` API. Let’s name our class ``OrganicBondVisualizer`` (an
+arbitrary name) and inherit the :class:`~inkex.extensions.CallExtension` class.
+
+.. code:: python
+
+ import inkex
+
+ class OrganicBondVisualizer(inkex.CallExtension):
+ #implement functionality here
+ pass
+
+Specify the formats
+~~~~~~~~~~~~~~~~~~~
+
+We now specify the input file format and output file format. (both
+without the ``.``). The output file format by default is ``svg``.
+
+.. code:: python
+
+ import inkex
+ from inkex import command
+
+ class OrganicBondVisualizer(inkex.CallExtension):
+
+ input_ext = 'smi'
+ output_ext = 'svg'
+
+ #implement functionality here
+ pass
+
+Override
+~~~~~~~~
+
+To be able to call an another program, we need to override the :func:`~inkex.extensions.CallExtension.call`
+function in our class. We need to import the :mod:`~inkex.command` module as it
+contains the actual implementation to call external programs. Inside the
+overridden method we call :mod:`~inkex.command` module’s :func:`~inkex.command.call` function.
+
+.. code:: python
+
+ import inkex
+ from inkex import command
+
+ class OrganicBondVisualizer(inkex.CallExtension):
+
+ input_ext = 'smi'
+ output_ext = 'svg'
+
+ def call(self, input_file, output_file):
+ command.call('indigo-depict', input_file, output_file)
+
+The first argument for :mod:`~inkex.command`\ ’s :func:`~inkex.command.call` function is the name of
+the external program. It can also be a path string like
+``'/usr/bin/program'``. Although internally ``inkex`` converts the names
+to path strings like these, you should not use them yourself. The reason
+being that the user of this extension may not have the command at the
+same path as the absolute path specified by us, the extension author.
+
+ **Note**: *Windows* users don’t need to specify ``.exe`` in the name
+ of the program.
+
+The ``input_file`` and ``output_file`` are path strings received by the
+:func:`~inkex.extensions.CallExtension.call` function from inkex. We then just pass these to
+:mod:`~inkex.command`\ ’s :func:`~inkex.command.call` function.
+
+Make it all happen
+~~~~~~~~~~~~~~~~~~
+
+We now just add the ``__main__`` part where the extension runs.
+
+.. code:: python
+
+ import inkex
+ from inkex import command
+
+ class OrganicBondVisualizer(inkex.CallExtension):
+
+ input_ext = 'smi'
+ output_ext = 'svg'
+
+ def call(self, input_file, output_file):
+ command.call('indigo-depict', input_file, output_file)
+
+ if __name__ == '__main__':
+ OrganicBondVisualizer().run()
+
+Now save the file.
+
+Moment of Truth
+---------------
+
+Now, we should test our extension to see in action.
+
+- Open a new Inkscape window
+- Click on the ``File``>\ ``Import`` dialog
+- Select the ``.smi`` file (An example ``.smi`` file is attached above
+ under `Resources <#resources>`__) and double-click on it. You should
+ see the following output:
+
+.. figure:: resources/call_extension_success.gif
+ :alt: Did_It_Work
+
+ Did_It_Work
diff --git a/share/extensions/docs/tutorial/my-first-text-extension.rst b/share/extensions/docs/tutorial/my-first-text-extension.rst
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+My first text extension
+=======================
+
+This article will teach you the basics of writing a Text Extension for
+Inkscape using the ``inkex`` Extensions API.
+
+Introduction
+------------
+
+Any extension that manipulates text in any way is a Text Extension. Text
+Extensions can broadly be categorized in two types based on the type of
+manipulation they do to text:
+
+1. **Manipulating the text itself** - like changing case.
+2. **Changing attributes of the text** like font, color, size, etc.
+ There can also be extensions which are a hybrid of both the above
+ types.
+
+In this article we will create an extension named ``Stronger Text``. It
+is a *Type 2* Text Extension and it will make the selected text bold and
+it will also italicize it. We will also see an example of creating a
+*Type 1* Text Extension.
+
+.. hint::
+
+ This article assumes you create all files in the User Extensions
+ directory which is listed at
+ ``Edit``>\ ``Preferences``>\ ``System`` - ``User Extensions:`` in
+ Inkscape.
+
+Step 0 : The Boilerplate
+------------------------
+
+Like any other Inkscape extension, this extension will also have two files.
+So, create a ``stronger_text.inx`` file and a ``stronger_text.py`` file.
+
+- ``stronger_text.inx``: It will have the necessary information
+ for Inkscape to be able to recognize your extension as a valid
+ Inkscape extension. It will also have the declaration of any
+ interface for your extension.
+- ``stronger_text.py``: It will have
+ the actual Python code your extension will execute.
+
+.. hint::
+
+ There is another file that is worth mentioning here - the **test**
+ file which in our case will be ``test_stronger_text.py``. It is not
+ required to be present for an extension per se, but as a best
+ practice, the extension code should always be accompanied by test
+ code.
+
+Step 1 : Populate the ``*.inx`` file
+------------------------------------
+
+Our extension **Stronger Text** will have a very basic ``.inx`` file.
+
+.. code:: xml
+
+ <?xml version="1.0" encoding="UTF-8"?>
+ <inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
+ <name>Stronger Text</name>
+ <id>org.inkscape.text.strongertext</id>
+ <effect>
+ <object-type>all</object-type>
+ <effects-menu>
+ <submenu name="Text">
+ </submenu>
+ </effects-menu>
+ </effect>
+ <script>
+ <command location="inx" interpreter="python">stronger_text.py</command>
+ </script>
+ </inkscape-extension>
+
+Explanation
+~~~~~~~~~~~
+
+The lines below help Inkscape uniquely identify our extension so that it
+can be displayed under the **Extensions** menu. You should modify these
+two lines for your own extension:
+
+.. code:: xml
+
+ [...]
+ <name>Stronger Text</name>
+ <id>org.inkscape.text.strongertext</id>
+ [...]
+
+Towards the end of the ``.inx`` file, we change the submenu to ``Text``.
+It specifies that this extension should be listed in the **Text**
+submenu under the **Extensions** menu in Inkscape UI:
+
+.. code:: xml
+
+ [...]
+ <effect>
+ <object-type>all</object-type>
+ <effects-menu>
+ <submenu name="Text">
+ </submenu>
+ </effects-menu>
+ </effect>
+ [...]
+
+Now - Save the file - Close any open Inkscape windows - Relaunch
+Inkscape
+
+After successfuly completing these steps, you should see the Stronger
+Text extension in Inkscape UI.
+
+.. figure:: resources/Inkscape_Recognizes_Our_Extension.gif
+ :alt: Inkscape Recognizes Our Extension
+
+ Inkscape Recognizes Our Extension
+
+Currently it doesn’t do anything as we haven’t written anything in the
+``stronger_text.py`` file.
+
+Step 2 : Write the code in ``*.py`` file
+----------------------------------------
+
+First Things First
+^^^^^^^^^^^^^^^^^^
+
+To be able to use any extension functionality, you need to import the
+``inkex`` module.
+
+.. code:: py
+
+ import inkex
+
+Every Text Extension inherits from the :class:`~inkex.extensions.TextExtension` class provided
+by the ``inkex`` API. Let’s name our class ``StrongerText`` (an
+arbitrary name) and inherit the :class:`~inkex.extensions.TextExtension` class.
+
+.. code:: py
+
+ import inkex
+
+ class StrongerText(inkex.TextExtension):
+ #implement functionality here
+ pass
+
+The ``TextExtension`` class provides us with methods to manipulate the
+text.
+
+Our extension ``Stronger Text`` is a *Type 2* extension as it needs to
+change the attributes of text. To get access to the attributes of the
+text, we need to override the :func:`~inkex.extensions.TextExtension.process_element` method.
+
+.. code:: py
+
+ import inkex
+
+ class StrongerText(inkex.TextExtension):
+ def process_element(self, text_node):
+ text_node.style["font-weight"] = "bold"
+ text_node.style["font-style"] = "italic"
+ #text_node.style["attribute-name"] = "value"
+
+ StrongerText().run()
+
+.. _explanation-1:
+
+Explanation
+~~~~~~~~~~~
+
+| ``text_node.style`` provides us with a dictionary (technically it’s an
+ ``OrderedDict``) which we can use to change the attributes of the text
+ by using the attribute name as a key.
+| When a standard inkex-based Text Extension is run, it will call a
+ method called :func:`~inkex.extensions.TextExtension.effect` on the ``TextExtension`` class which then
+ eventually calls our(``StrongerText``\ ’s) ``process_element``
+ function. \**\* If your extension is a *Type 1* Text Extension, i.e,
+ it’s purpose is to take text from Inkscape, transform/manipulate it,
+ and return it to Inkscape, you just need to override the
+ :func:`~inkex.extensions.TextExtension.process_chardata` function like so:
+
+.. code:: py
+
+ import inkex
+
+ class UpperCase(inkex.TextExtension):
+ def process_chardata(self, text):
+ # do some more manipulations here if you want
+ return text.upper()
+
+ UpperCase().run()
+
+.. _explanation-2:
+
+Explanation
+~~~~~~~~~~~
+
+The ``text`` parameter in the :func:`~inkex.extensions.TextExtension.process_chardata` function receives
+the text from Inkscape as a Python string. In the :func:`~inkex.extensions.TextExtension.process_chardata`
+function itself, we can manipulate the string in any way to our
+liking. We then return the manipulated string.
+
+Infact, if you’ve used the ``UPPERCASE`` extension in Inkscape from
+the ``Extensions``>\ ``Text``>\ ``Change Case`` submenu, it is
+identical to the Extension we just wrote!
+
+.. hint::
+
+ This *Type 1* Extension
+ will have an almost identical ``.inx`` file with changes in places
+ like the ``<name>`` and ``<id>`` tags and a separate ``.py`` file with
+ the above code in it.
+
+Moment of Truth
+---------------
+
+Now, we should test our extension to see it in action. - Select some
+Text (preferably a font that has bold and italics styles available) -
+Click on the **Stronger Text** extension
+
+The result should appear like this:
+
+.. figure:: resources/Text_Ext_Moment_of_truth.gif
+ :alt: A gif showing that the extension works.
+
+ Did It Work? (yes, indeed)
diff --git a/share/extensions/docs/tutorial/resources/Call_Extension_Failure.png b/share/extensions/docs/tutorial/resources/Call_Extension_Failure.png
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diff --git a/share/extensions/docs/tutorial/resources/vanillin.smi b/share/extensions/docs/tutorial/resources/vanillin.smi
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+COc1cc(C=O)ccc1O
diff --git a/share/extensions/docs/tutorial/simple-path-extension.rst b/share/extensions/docs/tutorial/simple-path-extension.rst
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+A more complex example: reading path data and changing the style
+================================================================
+
+.. note::
+ This tutorial builds on the files created in :ref:`first-effect-extension`.
+
+Resources
+---------
+
+- :download:`Example solution <resources/stroke_parity_extension.zip>`
+
+Introduction
+------------------
+
+We are going to write an effect extension that will change any path with
+an even number of nodes to a user-defined stroke and any path with an odd
+number of nodes to a different user-defined stroke color.
+
+From :ref:`first-effect-extension`, we already know how to create the extension boilerplate
+(without parameters), how to iterate over the selection and how to modify the style.
+
+This extension adds two more things: Paths and Parameters.
+
+Setting up the inx file
+-----------------------
+
+Duplicate the files from the `make_red_extension`, and change all the filenames, class names
+and extension ID to `stroke_parity_extension`.
+
+Now for the parameters for the colors. We're also going to add a checkbox to remove the fill of the
+selected paths. The params are defined after ``<id>`` and before ``<effect>`` in the inx file:
+
+.. code:: xml
+
+ <param name="remove_fill" type="bool" gui-text="Remove fill">false</param>
+ <label appearance="header">Stroke color for path based on number of nodes</label>
+ <param name="tab" type="notebook">
+ <page name="even" gui-text="Even">
+ <param name="even_color" type="color" gui-text="Even stroke color:">4278190335</param>
+ </page>
+ <page name="odd" gui-text="Odd">
+ <param name="odd_color" type="color" gui-text="Odd stroke color:">65535</param>
+ </page>
+ </param>
+
+The default colors are defined as content of the ``<param>`` element, and they are passed as
+integers in RGBA format, so for a "red" color (i.e. ``#ff000ff``), one has to write
+``256^3*255 + 255 = 4278190335``.
+
+Color widgets are quite large, so the two widgets are added in a notebook (i.e. two tabs).
+
+You can also change the submenu the extension will be listed in to ``Modify Path``.
+
+Restart Inkscape. If you click the extension in the menu, it should look something like this:
+
+.. figure:: resources/stroke-parity-widget.png
+
+Adding the parameters to the python file
+----------------------------------------
+
+When Inkscape calls the extension in the current state, an error message is shown::
+
+ usage: stroke_parity_extension.py [-h] [--output OUTPUT] [--id IDS]
+ [--selected-nodes SELECTED_NODES]
+ [INPUT_FILE]
+ stroke_parity_extension.py: error: unrecognized arguments: --remove_fill=false --tab=even --even_color=4278190335 --odd_color=65535
+
+We also have to tell the ``MakeRedExtension`` class how to parse the parameters. This is done in the
+:func:`~inkex.base.InkscapeExtension.add_arguments` method. We have four parameters: the two colors,
+the checkbox and the currently selected tab.
+
+.. code:: python
+
+ def add_arguments(self, pars):
+ pars.add_argument("--even_color", type=inkex.Color, default=inkex.Color("red"))
+ pars.add_argument("--odd_color", type=inkex.Color, default=inkex.Color("blue"))
+ pars.add_argument("--remove_fill", type=inkex.Boolean, default=False)
+ pars.add_argument("--tab", type=str, default="stroke")
+
+In ``effect``, these parameters are available as e.g. ``self.options.even_color``.
+
+.. hint::
+
+ :func:`inkex.Boolean <inkex.utils.Boolean>` and :class:`inkex.Color <inkex.colors.Color>` are
+ special types that preprocess the parsed parameter, so that ``self.options.even_color`` is an
+ :class:`inkex.colors.Color` object and not the string ``"4278190335"``.
+
+Processing the paths
+--------------------
+
+Modify the ``effect`` method as follows:
+
+.. code-block:: python
+ :linenos:
+
+ def effect(self):
+ for elem in self.svg.selection.filter(inkex.PathElement):
+ elem.set('inkscape:modified_by_tutorial', 'Yes')
+ elem.style['stroke-width'] = 2.0
+ if len(elem.path) % 2: # odd number
+ elem.style.set_color(self.options.odd_color, 'stroke')
+ else:
+ elem.style.set_color(self.options.even_color, 'stroke')
+
+ if self.options.remove_fill:
+ elem.style["fill"] = None
+
+Code Explanation
+~~~~~~~~~~~~~~~~
+
+Firstly, we need to loop through each of the selected paths. We already now how to do this
+from the first tutorial, but we now filter the selection to only contain
+:class:`~inkex.elements._polygons.PathElement` objects - since we want to count the number of nodes.
+If other objects, such as a text object or rectangle, are selected, they are ignored. So, for each
+iteration of the loop, ``elem`` will contain one of the selected path
+objects.
+
+The second line sets an attribute ``inkscape:modified_by_tutorial`` on
+the xml element ``elem``. The attribute API will handle the ``inkscape``
+namespace for us, so we can use a simple colon to indicate the
+namespace. This is how all non-special attributes are set and gotten.
+But on top of this simple API we don’t have to worry about parsing the
+path, transform or the style attributes. Instead the inkex API does all
+the parsing for us and provides us with a way to change styles, modify
+paths and even do transformations without manual parsing.
+
+Then we set a stroke-width of 2, using the standard style API which is
+assigning into a type of ordered dictionary.
+
+Next we use the Path API to get the path data of the element, using
+:attr:`~inkex.elements._base.ShapeElement.path`. This is an :class:`inkex.paths.Path` object,
+which is a list of all path commands (such as Moveto, Lineto, Curveto...). We can use the length
+of the list to determine the number of segments, which is (for the simple case of open paths) equal
+to the number of nodes.
+
+We then use the Color API to assign the correct stroke color. The parameters are passed in RGBA format,
+and we can use the :func:`~inkex.styles.Style.set_color` function to set opacity and stroke at the same time.
+Stroke and stroke opacity are two different style properties, so we can’t set them with a simple
+assignment.
+
+Last we set the fill to ``None`` (``"none"`` would work as well) - if the checkbox for this is
+checked.
+
+Testing the extension
+---------------------
+
+As we've already learned, there’s no need to set, save or do anything else as we’ve
+modified the style in place.
+
+Save your python script, and re-launch Inkscape. If inkscape was already
+open, close it first. You should find your new extension available in
+the ``Modify Path`` menu.
+
+Draw some shapes with the pen tool, select some of the shapes and use the extension.
+You should see the stroke color change for each of the objects selected.
+
+.. note::
+ For closed paths, the extension gives incorrect results, because the closing "Z" / "z"
+ command does not add a new node, but is counted by ``len(path)``.
+
+ This can be avoided by manually counting segments except that are not ZoneClose (zoneClose) commands.
+