Extension:CodeMirror/cs

This documentation refers to CodeMirror 6 – the new version of CodeMirror. It is slated to replace CodeMirror 5 by MediaWiki version 1.45 (release timeline ). See the migration guide on migrating clients to CodeMirror 6, and Extension:CodeMirror/5 for CodeMirror 5 documentation.
Category:GPL licensed extensions/cs
Příručka k rozšířením MediaWiki
CodeMirror
Stav rozšíření: stabilníCategory:Stable extensions/cs
Implementace Uživatelské rozhraníCategory:User interface extensions/cs
Popis Provides syntax highlighting in editors
Autoři
Správci Community Tech
Nejnovější verze 6.0.0
Zásady kompatibility Vydání snímků současně s MediaWiki. Hlavní vývojová větev není zpětně kompatibilní.
PHP 7.4+
Licence GNU General Public License 2.0 nebo novější
Stáhnout Category:Extensions in Wikimedia version control/cs
README
  • $wgCodeMirrorContentModels
  • $wgCodeMirrorV6
  • $wgCodeMirrorConflictingGadgets
  • $wgCodeMirrorTitleCompletion
  • $wgCodeMirrorDefaultPreferences
  • $wgCodeMirrorLineNumberingNamespaces
Přeložte rozšíření CodeMirror, používá-li lokalizaci z translatewiki.net
Problémy Otevřené úkoly · Nahlásit chybu
Category:All extensions/cs

The CodeMirror extension provides a standalone editor that provides syntax highlighting in a number of programming and markup languages, including wikitext, using the CodeMirror library. It can be used with other editors such as WikiEditor, the Editor wikitextu 2017, Proofread Page, and more. For usage and a list of features, see Help:Extension:CodeMirror.

In 2024–2025, the extension was upgraded to the new major version, CodeMirror 6, and with it many new features were added.

Použití

Ohledně použití tohoto rozšíření viz Help:Extension:CodeMirror.

Dokumentaci JavaScriptu najdete na docs.wikimedia.org/CodeMirror.

Instalace

  • Stáhněte soubor/y a vložte je do adresáře pojmenovaného CodeMirror ve vaší složce extensions/.
    Vývojáři a přispěvatelé kódu by si místo toho měli nainstalovat rozšíření from Git pomocí:
    cd extensions/
    git clone https://gerrit.wikimedia.org/r/mediawiki/extensions/CodeMirror
    
  • Na konec vašeho souboru LocalSettings.php přidejte následující kód:
    wfLoadExtension( 'CodeMirror' );
    
  • Configure as required.
  • Yes Dokončeno – Přejděte na stránku Special:Version vaší wiki a zkontrolujte, zda bylo rozšíření úspěšně nainstalováno.

Konfigurace

For customization of colors and CodeMirror's various features, see Help:Extension:CodeMirror .

To enable CodeMirror for all users by default, add the following to your LocalSettings.php:

# Enables use of CodeMirror by default but still allow users to disable it
$wgDefaultUserOptions[ 'usecodemirror' ] = true;
$wgCodeMirrorV6
Temporary feature flag to control the migration to CodeMirror 6 (T259059).
$wgCodeMirrorEnabledModes
Temporary feature flag to control conflicts with Extension:CodeEditor.
$wgCodeMirrorConflictingGadgets
An array of gadget names that, if enabled, will prevent CodeMirror from loading. Defaults to wikEd.
$wgCodeMirrorDefaultPreferences
Control which features are enabled by default for all users. Use true or false to enable or disable a feature entirely, or provide an array containing namespace IDs (integers) or content models (strings). For example, to limit autocompletion to JavaScript pages or templates, you could use:
$wgCodeMirrorDefaultPreferences[ 'autocomplete' ] = [ CONTENT_MODEL_JAVASCRIPT, NS_TEMPLATE ];
$wgCodeMirrorDefaultPreferences
Feature2017 editor
compatibility
Default value
activeLinefalse
bidiIsolationfalse
bracketMatchingYestrue
lineNumberingYestrue
lineWrappingYes[1]true
specialCharstrue
codeFoldingtrue
autocompletetrue
openLinkstrue
whitespacefalse
lint['json','css','javascript','lua']


Differences from CodeMirror 5

New features

Deprecations and other changes

  • The ResourceLoader modules are changing. See the migration guide.
  • The ext.CodeMirror.switch hook has been deprecated. Use ext.CodeMirror.toggle instead.
  • The .cm-mw-mnemonic CSS class has been renamed to .cm-mw-html-entity.
  • The .cm-mw-template-name-mnemonic class has been removed. Use .cm-mw-template-ground.cm-html-entity instead.
  • The .cm-mw-apostrophes-bold and .cm-mw-apostrophes-italic CSS classes have been removed. Use .cm-mw-apostrophes instead.
  • Line-level styling for <nowiki>, <pre>, or any tag without an associated TagMode has been removed (T351686).
  • Mixed languages within wikitext are not yet supported (T357480).
  • The browser's native search functionality (using Ctrl+F) has been replaced with search functionality built into CodeMirror. This is necessary to maintain performance (T303664).

Migration guide

Verze MediaWiki:
1.44

This guide applies to MediaWiki 1.44 and later. All integrations should aim to be migrated by the release of MediaWiki 1.45 (release timeline).

MediaWiki configuration

  • $wgCodeMirrorLineNumberingNamespaces is deprecated. Configure $wgCodeMirrorDefaultPreferences instead.

ResourceLoader modules

Ensure you're using the new .v6 modules. Because CodeMirror 6 no longer relies on WikiEditor, there are some naming and behaviourial changes from the CodeMirror 5 counterparts:

Some module names are shown without the ext.CodeMirror prefix for brevity; replace the '…' when using.

Old module New module (MW 1.43) New module (MW 1.45+) Description
ext.CodeMirror ….v6.WikiEditor.init ….init CodeMirror integration for WikiEditor on #wpTextbox1 (the normal editing textarea).
N/A ….v6.WikiEditor ….WikiEditor Exports the CodeMirrorWikiEditor class
N/A ….v6.init ….init CodeMirror for #wpTextbox1 and other supported pages.
….lib ….v6.lib ….lib Exports CodeMirror internals.
….addons N/A N/A This packaged the bracket matching feature in CodeMirror 5. Bracket matching is default behaviour in CodeMirror 6.
….mode.mediawiki ….v6.mode.mediawiki ….mode.mediawiki The MediaWiki language mode.
N/A ext.CodeMirror.v6 ext.CodeMirror Exports the CodeMirror class.
….visualEditor ….visualEditor.init ….init Integration with the Editor wikitextu 2017.
….lib.mode.php N/A N/A CodeMirror 6 will not provide these modules. They are rarely used and have no corresponding content model in MediaWiki. If you want support for these languages, you'll need to install the packages and bundle the code yourself.
….lib.mode.clike
….lib.mode.htmlmixed
….lib.mode.xml
….lib.mode.javascript TBD ….lib.mode.javascript These languages are planned to be supported in CodeMirror 6.
….lib.mode.css ….lib.mode.css
N/A ….lib.mode.lua
N/A ….lib.mode.json
N/A ….lib.mode.vue

With the release of MediaWiki 1.45, the old modules will be replaced with the news ones, and for some time the .v6 modules will be aliased before being removed entirely.

Gadgets and user scripts

The CodeMirror global has been removed entirely. For example, CodeMirror.fromTextArea( myTextarea ) will no longer work. Instead, first load the desired ResourceLoader modules, instantiate a CodeMirror object, and call the initialize() method.

If your script relies on the ext.CodeMirror.switch hook to change the way it interacts with the editor, you'll need to use ext.CodeMirror.toggle instead, or alternatively listen to an event. See the JavaScript integration section for more information.

CSS

The .CodeMirror element no longer exists. Use .cm-editor instead for the entire CodeMirror DOM, or .cm-content for the inner content (doesn't include the search panel, for example).

See deprecations and other changes to other CSS classes.

Integration

MediaWiki Extensions

Using CodeMirror instead of CodeEditor

Verze MediaWiki:
1.44

As of MediaWiki 1.44, CodeMirror supports highlighting of the Lua, JavaScript, CSS, and JSON languages. It can be used as an alternative to Extension:CodeEditor.

However, not all extensions that integrate with CodeEditor have been updated to support CodeMirror. If you are using any of these extensions, you may want to keep CodeEditor installed on your wiki:

Registering a new tag for MediaWiki

If you simply want CodeMirror to recognize a tag that is added by an extension, you can do so using the CodeMirrorTagModes extension attribute. For example, to register the tag <foo> as something containing wikitext, you would add the following to extension.json:

{
	"attributes": {
		"CodeMirror": {
			"TagModes": [
				"foo": "mediawiki"
			]
		}
	}
}

CodeMirror will then highlight the content inside <foo>...</foo> as wikitext.

Registering a tag so that CodeMirror treats the contents as something other than wikitext is currently not supported (T357480). If a tag is not registered, CodeMirror will highlight the contents as non-wikitext in the same way it highlights the contents of a <nowiki>...</nowiki> tag.

PHP hook

Verze MediaWiki:
1.44

Since MediaWiki 1.44, the preferred means to integrate with CodeMirror in PHP is implementing the CodeMirrorGetModeHook interface:

class CodeMirrorHooks implements CodeMirrorGetModeHook {
	public function onCodeMirrorGetMode(Title $title, ?string &$mode, string $model ): bool {
		// Logic to determine if CodeMirror should be used
		if ( $title->hasContentModel( 'JsonLikeContentModel' ) ) {
			$mode = 'json';
			return false;
		}

		return true;
	}
}

Register the hook in extension.json:

"Hooks": {
	"CodeMirrorGetMode": "codemirror"
},
"HookHandlers": {
	"codemirror": {
		"class": "MediaWiki\\Extension\\MyExtension\\CodeMirrorHooks"
	}
}

PluginModules

CodeMirrorPluginModules is an extension attribute that allows side-loading a module with CodeMirror. This unconditionally loads the module whenever the ext.CodeMirror.v6 module is loaded.

extension.json:

{
	"attributes": {
		"CodeMirror": {
			"PluginModules": [
				"ext.MyExtension.CodeMirror"
			]
		}
	}
}

JavaScript

The CodeMirror editor is not an actual textarea, but a contenteditable. Usually developers need to ensure their code works with both given that CodeMirror can be toggled off.

For detecting changes to the document, using an event or a hook is likely the simplest. For reading and making changes, jQuery.textSelection may be convenient.

For more complex integrations or those who need better preformance, you can add your own extension to a new or an existing CodeMirror instance.

Using jQuery.textSelection

If you simply want to fetch or make changes to the document text, jQuery.textSelection is the easiest and most reliable means to do so. Usage of jQuery.textSelection on the textarea is bubbled up to CodeMirror, so you don't need to have any knowledge of whether CodeMirror is enabled:

const $textarea = $( '#wpTextbox1' )
const content = $textarea.textSelection( 'getContents' );
// Append "Foobar" to the content.
$textarea.textSelection( 'setContents', content + '\nFoobar' );

jQuery's .val() on #wpTextbox1 can be used,[2] but this isn't recommended and may not work in all editors, such as the Editor wikitextu 2017.


Using ResourceLoader

The CodeMirror extension provides a number of ResourceLoader modules for use by user scripts, gadgets, and extensions. To make use of CodeMirror, you'll need at minimum the ext.CodeMirror.v6 module, along with the desired language. For MediaWiki wikitext, you'd use ext.CodeMirror.v6.mode.mediawiki.

Here is an example of how to apply wikitext syntax highlighting to any arbitrary textarea, using the default set of features:

const require = await mw.loader.using( [ 'ext.CodeMirror.v6', 'ext.CodeMirror.v6.mode.mediawiki' ] );
const CodeMirror = require( 'ext.CodeMirror.v6' );
const mediawikiLang = require( 'ext.CodeMirror.v6.mode.mediawiki' );
const cm = new CodeMirror( myTextarea, mediawikiLang() );
cm.initialize();

If you also want WikiEditor:

const require = await mw.loader.using( [
	'ext.wikiEditor',
	'ext.CodeMirror.v6.WikiEditor',
	'ext.CodeMirror.v6.mode.mediawiki'
] );
const textarea = document.getElementById( 'wpTextbox1' );
mw.addWikiEditor( $( textarea ) );
const CodeMirrorWikiEditor = require( 'ext.CodeMirror.v6.WikiEditor' );
const mediawikiLang = require( 'ext.CodeMirror.v6.mode.mediawiki' );
const cmWe = new CodeMirrorWikiEditor( textarea, mediawikiLang() );
cmWe.initialize();
ResourceLoader modules
Module Description
ext.CodeMirror.v6.lib The core CodeMirror library. You shouldn't need to require this directly unless you need access to the upstream CodeMirror API.
ext.CodeMirror.v6 The basic CodeMirror integration for MediaWiki editors. This module exports the CodeMirror class.
ext.CodeMirror.v6.mode.mediawiki The MediaWiki language mode. Use this in conjunction with the ext.CodeMirror.v6 module.
ext.CodeMirror.v6.init
(internal)
The main entrypoint for action=edit requests. Not intended for external use.
ext.CodeMirror.v6.WikiEditor CodeMirror integration for WikiEditor. This module exports the CodeMirrorWikiEditor class.
ext.CodeMirror.visualEditor.init CodeMirror integration with the Editor wikitextu 2017, and only for wikitext.

Using hooks

You can also integrate with CodeMirror by using frontend hooks. These allow you to run code just before or after CodeMirror has loaded, or react to changes to the document.

Frontend hooks
Hook Description
ext.CodeMirror.initialize Called just before CodeMirror is initialized. This can be used to manipulate the DOM to suit CodeMirror (i.e. if you manipulate WikiEditor's DOM, you may need this).

Parameters

  • (HTMLTextAreaElement) The current "editor", most likely #wpTextbox1.
  • (ve.ui.Surface) The VisualEditor surface CodeMirror is bound to, if applicable.
ext.CodeMirror.ready Called just after CodeMirror is initialized.

Parameters

ext.CodeMirror.toggle Called when CodeMirror is toggled on or off.

Parameters

  • (boolean) Whether CodeMirror is now enabled.
  • (CodeMirror) The CodeMirror instance.
  • (HTMLTextAreaElement) The original textarea.
ext.CodeMirror.destroy Called just after CodeMirror is destroyed and the original textarea is restored.

Parameters

  • (HTMLTextAreaElement) The original textarea.
ext.CodeMirror.input Called when document changes are made in CodeMirror. Note that the textarea may not be updated yet.

Parameters

ext.CodeMirror.preferences.ready Fired just before CodeMirrorPreferences has been instantiated.

Paramaters

ext.CodeMirror.preferences.apply Fired when a CodeMirror preference is enabled or initially applied.

Parameters

ext.CodeMirror.preferences.change Fired when a CodeMirror preference is enabled or disabled by the user.

Paramaters

  • (string) The name of the preference.
  • (boolean) The new value of the preference.
ext.CodeMirror.preferences.display
(internal)
Fired when the preferences panel is constructed, just before it is displayed.

Parameters

  • (HTMLDivElement) The preferences panel container.
ext.CodeMirror.keymap
(internal)
Fired when the keyboard shortcut help dialog is opened.
ext.CodeMirror.search
(internal)
Fired when the search panel is opened.

Using events

The following events are bubbled to the textarea for developer convenience:

Using these events, you can integrate with CodeMirror using the same code as the original textarea:

myTextarea.addEventListener( 'keyup', ( event ) => {
	console.log( event.key );
} );

Extending CodeMirror

You can import the ext.CodeMirror.v6.lib module to get access to the upstream CodeMirror API. With this you can provide your own Extension when instantiating a CodeMirror or CodeMirrorWikiEditor instance.

For example, to provide your own Extension that reacts to changes made in CodeMirror:

await require = mw.loader.using( [ 'ext.CodeMirror.v6', 'ext.CodeMirror.v6.mode.mediawiki' ] );
const CodeMirror = require( 'ext.CodeMirror.v6' );
const mediawikiLang = require( 'ext.CodeMirror.v6.mode.mediawiki' );
// ext.CodeMirror.v6.lib is a dependency of ext.CodeMirror.v6, so it's already loaded at this point.
const { EditorView } = require( 'ext.CodeMirror.v6.lib' );
const myExtension = EditorView.updateListener.of( ( /** @type {ViewUpdate} */ update ) => {
	if ( update.docChanged ) {
	    // do something
	    console.log( update.changes );
	}
} );
const cm = new CodeMirror( myTextarea, mediawikiLang() );
cm.initialize( [ cm.defaultExtensions, myExtension ] );

Or if you need to interact with an existng CodeMirror instance:

// Ensure CodeMirror is initialized first
mw.hook( 'ext.CodeMirror.ready' ).add( ( cm ) => {
	const { EditorView } = require( 'ext.CodeMirror.v6.lib' );
	const myExtension = EditorView.updateListener.of( ( /** @type {ViewUpdate} */ update ) => {
		if ( update.docChanged ) {
		    // do something
		    console.log( update.changes );
		}
	} );
	cm.applyExtension( myExtension );
} );

Another means of listening to changes is using the ext.CodeMirror.input hook:

mw.hook( 'ext.CodeMirror.input' ).add( ( update ) => {
	// Print the ChangeSet to the console
	console.log( update.changes.toJSON() );
} );

See also

Notes

  1. Line wrapping cannot be disabled in the 2017 editor.
  2. phab:T384556


Category:Extensions used on Wikimedia/cs#CodeMirror/cs Category:Syntax highlighting extensions/cs
Category:All extensions/cs Category:EditPage::showEditForm:initial extensions/cs Category:EditPage::showReadOnlyForm:initial extensions/cs Category:Extensions in Wikimedia version control/cs Category:Extensions included in Canasta/cs Category:Extensions included in Fandom/cs Category:Extensions included in Miraheze/cs Category:Extensions included in MyWikis/cs Category:Extensions included in ProWiki/cs Category:Extensions included in Telepedia/cs Category:Extensions included in WikiForge/cs Category:Extensions included in wiki.gg/cs Category:Extensions used on Wikimedia/cs Category:GPL licensed extensions/cs Category:GetBetaFeaturePreferences extensions/cs Category:GetPreferences extensions/cs Category:SpecialPageBeforeExecute extensions/cs Category:Stable extensions/cs Category:Syntax highlighting extensions/cs Category:UploadForm:initial extensions/cs Category:User interface extensions/cs