godot-docs/classes/class_syntaxhighlighter.rst

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.. _class_SyntaxHighlighter:

SyntaxHighlighter
=================

**Inherits:** :ref:`Resource<class_Resource>` **<** :ref:`RefCounted<class_RefCounted>` **<** :ref:`Object<class_Object>`

**Inherited By:** :ref:`CodeHighlighter<class_CodeHighlighter>`, :ref:`EditorSyntaxHighlighter<class_EditorSyntaxHighlighter>`

Base Syntax highlighter resource for :ref:`TextEdit<class_TextEdit>`.

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Description
-----------

Base syntax highlighter resource all syntax highlighters extend from, provides syntax highlighting data to :ref:`TextEdit<class_TextEdit>`.

The associated :ref:`TextEdit<class_TextEdit>` node will call into the **SyntaxHighlighter** on a as needed basis.

\ **Note:** Each Syntax highlighter instance should not be shared across multiple :ref:`TextEdit<class_TextEdit>` nodes.

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Methods
-------

.. table::
   :widths: auto

   +-------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | void                                | :ref:`_clear_highlighting_cache<class_SyntaxHighlighter_method__clear_highlighting_cache>` **(** **)** |virtual|                                            |
   +-------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`Dictionary<class_Dictionary>` | :ref:`_get_line_syntax_highlighting<class_SyntaxHighlighter_method__get_line_syntax_highlighting>` **(** :ref:`int<class_int>` line **)** |virtual| |const| |
   +-------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | void                                | :ref:`_update_cache<class_SyntaxHighlighter_method__update_cache>` **(** **)** |virtual|                                                                    |
   +-------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | void                                | :ref:`clear_highlighting_cache<class_SyntaxHighlighter_method_clear_highlighting_cache>` **(** **)**                                                        |
   +-------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`Dictionary<class_Dictionary>` | :ref:`get_line_syntax_highlighting<class_SyntaxHighlighter_method_get_line_syntax_highlighting>` **(** :ref:`int<class_int>` line **)**                     |
   +-------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`TextEdit<class_TextEdit>`     | :ref:`get_text_edit<class_SyntaxHighlighter_method_get_text_edit>` **(** **)**                                                                              |
   +-------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | void                                | :ref:`update_cache<class_SyntaxHighlighter_method_update_cache>` **(** **)**                                                                                |
   +-------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------+

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----

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Method Descriptions
-------------------

.. _class_SyntaxHighlighter_method__clear_highlighting_cache:

.. rst-class:: classref-method

void **_clear_highlighting_cache** **(** **)** |virtual|

Virtual method which can be overridden to clear any local caches.

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----

.. _class_SyntaxHighlighter_method__get_line_syntax_highlighting:

.. rst-class:: classref-method

:ref:`Dictionary<class_Dictionary>` **_get_line_syntax_highlighting** **(** :ref:`int<class_int>` line **)** |virtual| |const|

Virtual method which can be overridden to return syntax highlighting data.

See :ref:`get_line_syntax_highlighting<class_SyntaxHighlighter_method_get_line_syntax_highlighting>` for more details.

.. rst-class:: classref-item-separator

----

.. _class_SyntaxHighlighter_method__update_cache:

.. rst-class:: classref-method

void **_update_cache** **(** **)** |virtual|

Virtual method which can be overridden to update any local caches.

.. rst-class:: classref-item-separator

----

.. _class_SyntaxHighlighter_method_clear_highlighting_cache:

.. rst-class:: classref-method

void **clear_highlighting_cache** **(** **)**

Clears all cached syntax highlighting data.

Then calls overridable method :ref:`_clear_highlighting_cache<class_SyntaxHighlighter_method__clear_highlighting_cache>`.

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----

.. _class_SyntaxHighlighter_method_get_line_syntax_highlighting:

.. rst-class:: classref-method

:ref:`Dictionary<class_Dictionary>` **get_line_syntax_highlighting** **(** :ref:`int<class_int>` line **)**

Returns syntax highlighting data for a single line. If the line is not cached, calls :ref:`_get_line_syntax_highlighting<class_SyntaxHighlighter_method__get_line_syntax_highlighting>` to calculate the data.

The return :ref:`Dictionary<class_Dictionary>` is column number to :ref:`Dictionary<class_Dictionary>`. The column number notes the start of a region, the region will end if another region is found, or at the end of the line. The nested :ref:`Dictionary<class_Dictionary>` contains the data for that region, currently only the key "color" is supported.

\ **Example return:**\ 

::

    var color_map = {
        0: {
            "color": Color(1, 0, 0)
        },
        5: {
            "color": Color(0, 1, 0)
        }
    }

This will color columns 0-4 red, and columns 5-eol in green.

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----

.. _class_SyntaxHighlighter_method_get_text_edit:

.. rst-class:: classref-method

:ref:`TextEdit<class_TextEdit>` **get_text_edit** **(** **)**

Returns the associated :ref:`TextEdit<class_TextEdit>` node.

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----

.. _class_SyntaxHighlighter_method_update_cache:

.. rst-class:: classref-method

void **update_cache** **(** **)**

Clears then updates the **SyntaxHighlighter** caches. Override :ref:`_update_cache<class_SyntaxHighlighter_method__update_cache>` for a callback.

\ **Note:** This is called automatically when the associated :ref:`TextEdit<class_TextEdit>` node, updates its own cache.

.. |virtual| replace:: :abbr:`virtual (This method should typically be overridden by the user to have any effect.)`
.. |const| replace:: :abbr:`const (This method has no side effects. It doesn't modify any of the instance's member variables.)`
.. |vararg| replace:: :abbr:`vararg (This method accepts any number of arguments after the ones described here.)`
.. |constructor| replace:: :abbr:`constructor (This method is used to construct a type.)`
.. |static| replace:: :abbr:`static (This method doesn't need an instance to be called, so it can be called directly using the class name.)`
.. |operator| replace:: :abbr:`operator (This method describes a valid operator to use with this type as left-hand operand.)`