Feature: #81901 - Extend T3editor

See forge#81901

Description

Since the refactoring of the system extension t3editor, custom modes (used for syntax highlighting) and addons can be registered now.

Prerequisites

To do this, extensions may have now these two files to feed T3editor:

Configuration/Backend/T3editor/Addons.php
Configuration/Backend/T3editor/Modes.php

Both files return an array, as known as in TCA and Backend Routes, for example.

Register an addon

To register an addon, the following code may be used:

'my/addon' => [
    'module' => 'cm/addon/my/addon',
    'cssFiles' => [
        'EXT:my_extension/Resources/Public/Css/MyAddon.css',
    ],
    'options' [
        'foobar' => 'baz',
    ],
    'modes' => ['htmlmixed', 'xml'],
],

Key	Type	Description
<identifier>	string	Represents the unique identifier of the module (`my/addon` in this example)
module	string	Mandatory: Holds the RequireJS namespace of the CodeMirror module. For custom modules placed in an extension, the known `TYPO3/CMS/Extension/Module` namespace must be used
cssFiles	array	Holds all CSS files that must be loaded for the module
options	array	Options that are used by the addon
modes	array	"Jails" the addon to specific modes. This means, the module is only loaded if any of the given modes is used

Register a mode

To register a mode, the following code may be used:

'css' => [
    'module' => 'cm/mode/css/css',
    'extensions' => ['css'],
],

Key	Type	Description
<identifier>	string	Represents the unique identifier and format code of the mode (`css` in this example). The format code is used in TCA to define the CodeMirror mode to be used
module	string	Mandatory: Holds the RequireJS namespace of the CodeMirror mode. For custom modules placed in an extension, the known `TYPO3/CMS/Extension/Mode` namespace must be used
extensions	array	Binds the mode to specific file extension. This is important for using T3editor in the Filelist module.
default	bool	If set, the mode is used as fallback if no sufficient mode is available. By factory default, the default mode is `html`

CodeMirror delivers a lot more modes and addons than registered in T3editor by default. More supported addons and modes are available at:

Impact

After clearing the system caches of TYPO3, T3editor checks every extension for the files Configuration/Backend/T3editor/Addons.php and Configuration/Backend/T3editor/Modes.php. The complete configuration of both is built and stored in the cache afterwards.

Affected Installations

All installations are affected.