CodeMirror and Legacy Ace Compatibility

Acode now uses CodeMirror 6 as the editor engine.

This page exists for plugin migration from Ace-era APIs.

What To Use Now

• Use editorManager.editor as the active editor view (EditorView).
• Use acode.require("commands") for command registration/removal.
• Use acode.require("editorLanguages") to register or remove language modes.
• Use acode.require("editorThemes") to register or apply editor themes.
• Use acode.require("codemirror") (or @codemirror/* / @lezer/*) for the same CodeMirror packages the app uses — see CodeMirror packages.
• Use editorManager.isCodeMirror to check whether current acode uses codemirror or ace, if its true then its codemirror and if it is null or undefined then its ace.

Legacy Compatibility

Acode still provides some Ace-like compatibility for older plugins:

• editorManager.editor.session exposes a session object with Ace-style helper methods.
• acode.require("aceModes") still maps to mode registration helpers.

These compatibility layers are for transition only. Prefer CodeMirror-first APIs for new plugins.

Migration Quick Map

Old pattern	New pattern
acode.require("aceModes")	acode.require("editorLanguages")
editor.session.setMode(...)	editorManager.activeFile?.setMode(...)
Ace global API usage (ace.*)	editorManager.editor + editorLanguages + editorThemes