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Replace Monaco with CodeMirror (#36764)

Browse Source 
- Replace monaco-editor with CodeMirror 6
- Add `--color-syntax-*` CSS variables for all syntax token types,
shared by CodeMirror, Chroma and EasyMDE
- Consolidate chroma CSS into a single theme-independent file
(`modules/chroma.css`)
- Syntax colors in the code editor now match the code view and
light/dark themes
- Code editor is now 12px instead of 14px font size to match code view
and GitHub
- Use a global style for kbd elements
- When editing existing files, focus will be on codemirror instead of
filename input.
- Keyboard shortcuts are roughtly the same as VSCode
- Add a "Find" button, useful for mobile
- Add context menu similar to Monaco
- Add a command palette (Ctrl/Cmd+Shift+P or F1) or via button
- Add clickable URLs via Ctrl/Cmd+click
- Add e2e test for the code editor
- Remove `window.codeEditors` global
- The main missing Monaco features are hover types and semantic rename
but these were not fully working because monaco operated only on single
files and only for JS/TS/HTML/CSS/JSON.

| | Monaco (main) | CodeMirror (cm) | Delta |
|---|---|---|---|
| **Build time** | 7.8s | 5.3s | **-32%** |
| **JS output** | 25 MB | 14 MB | **-44%** |
| **CSS output** | 1.2 MB | 1012 KB | **-17%** |
| **Total (no maps)** | 23.3 MB | 12.1 MB | **-48%** |

Fixes: #36311
Fixes: #14776
Fixes: #12171

<img width="1333" height="555" alt="image"
src="https://github.com/user-attachments/assets/f0fe3a28-1ed9-4f22-bf25-2b161501d7ce"
/>

---------

Signed-off-by: silverwind <me@silverwind.io>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: Giteabot <teabot@gitea.io>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
This commit is contained in:
silverwind
2026-03-31 23:50:45 +02:00
committed by GitHub
parent 4747dd68bd
commit e2e8509239
48 changed files with 2590 additions and 766 deletions
Download Patch File Download Diff File Expand all files Collapse all files

23
web_src/css/easymde.css
View File

@@ -440,3 +440,26 @@
border: 1px solid var(--color-secondary);
padding: 5px;
}
.EasyMDEContainer .CodeMirror .cm-keyword { color: var(--color-syntax-keyword); }
.EasyMDEContainer .CodeMirror .cm-atom { color: var(--color-syntax-keyword); }
.EasyMDEContainer .CodeMirror .cm-number { color: var(--color-syntax-number); }
.EasyMDEContainer .CodeMirror .cm-def { color: var(--color-syntax-name); }
.EasyMDEContainer .CodeMirror .cm-variable-2 { color: var(--color-syntax-name); }
.EasyMDEContainer .CodeMirror .cm-variable-3 { color: var(--color-syntax-type); }
.EasyMDEContainer .CodeMirror .cm-property { color: var(--color-syntax-name); }
.EasyMDEContainer .CodeMirror .cm-comment { color: var(--color-syntax-comment); }
.EasyMDEContainer .CodeMirror .cm-string { color: var(--color-syntax-string); }
.EasyMDEContainer .CodeMirror .cm-string-2 { color: var(--color-syntax-regexp); }
.EasyMDEContainer .CodeMirror .cm-meta { color: var(--color-syntax-control); }
.EasyMDEContainer .CodeMirror .cm-qualifier { color: var(--color-syntax-control); }
.EasyMDEContainer .CodeMirror .cm-builtin { color: var(--color-syntax-keyword); }
.EasyMDEContainer .CodeMirror .cm-bracket { color: var(--color-syntax-operator); }
.EasyMDEContainer .CodeMirror .cm-tag { color: var(--color-syntax-type); }
.EasyMDEContainer .CodeMirror .cm-attribute { color: var(--color-syntax-name); }
.EasyMDEContainer .CodeMirror .cm-header { color: var(--color-syntax-type); }
.EasyMDEContainer .CodeMirror .cm-quote { color: var(--color-syntax-comment); }
.EasyMDEContainer .CodeMirror .cm-hr { color: var(--color-syntax-operator); }
.EasyMDEContainer .CodeMirror .cm-url { color: var(--color-syntax-link); }
.EasyMDEContainer .CodeMirror .cm-link { color: var(--color-syntax-link); }
.EasyMDEContainer .CodeMirror .cm-error { color: var(--color-syntax-invalid); }