Extend T3editor

Custom modes (used for syntax highlighting) and addons can be registered.

CodeMirror delivers a lot more modes and addons than registered in T3editor by default.

More supported addons and modes are available at:

Prerequisites

To do this, extensions may have 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:

EXT:myext/Configuration/Backend/T3editor/Addons.php

<?php

return [
    'my/addon' => [
        'module' => JavaScriptModuleInstruction::create('@codemirror/addon', 'addon')->invoke()
        'cssFiles' => [
            'EXT:my_extension/Resources/Public/Css/MyAddon.css',
        ],
        'options' [
            'foobar' => 'baz',
        ],
        'modes' => ['htmlmixed', 'xml'],
    ],
];

<identifier>

type: string
Required: true

Represents the unique identifier of the module (my/addon in this example).

module

type: string
Required: true

Holds the JavaScriptModuleInstruction of the CodeMirror module.

cssFiles

type: array

Holds all CSS files that must be loaded for the module.

options

type: array

Options that are used by the addon.

modes

type: array

If set the addon is only loaded if any of the modes supplied here is used.

Register a mode

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

EXT:myext/Configuration/Backend/T3editor/Modes.php

<?php

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

<identifier>

type: string
Required: true

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.

Example:

$GLOBALS['TCA']['tt_content']['types']['css']['columnsOverrides']['bodytext']['config']['format'] = 'css';

module

type: string
Required: true

Holds the JavaScriptModuleInstruction of the CodeMirror module.

extensions

type: array

Binds the mode to specific file extensions. This is important for using T3editor in the module Filelist.

default

type: bool

If set, the mode is used as fallback if no sufficient mode is available. By factory default, the default mode is html.