From 7d0ed35d7f536c2825588bd56be06ad13dd3604e Mon Sep 17 00:00:00 2001
From: bigsunnyboy <415781593@qq.com>
Date: Tue, 12 May 2026 00:25:25 +0800
Subject: [PATCH] Restore copy behavior in Vim keymap

CodeMirror's Vim keymap consumes Ctrl-C on Windows and Linux before the editor can copy selected text. The fix adds a small shared extraKeys handler that invokes the browser copy command for Vim editors and then returns CodeMirror.Pass so CodeMirror can continue its normal handling.

Constraint: Keep the change scoped to the existing CodeMirror editor configuration

Rejected: Rework user-customizable keybindings | larger UI and settings change than the bounty issue requires

Confidence: medium

Scope-risk: narrow

Directive: Keep this handler attached to every cloud editor configuration that supports the Vim keymap

Tested: npx eslint src/cloud/lib/editor/vimKeyMap.ts src/cloud/components/Editor/index.tsx src/cloud/lib/hooks/editor/docEditor.ts --ext .ts,.tsx

Tested: npx tsc --noEmit --pretty false

Not-tested: Manual Windows/Linux Electron clipboard flow
---
 src/cloud/components/Editor/index.tsx   | 2 ++
 src/cloud/lib/editor/vimKeyMap.ts       | 9 +++++++++
 src/cloud/lib/hooks/editor/docEditor.ts | 2 ++
 3 files changed, 13 insertions(+)
 create mode 100644 src/cloud/lib/editor/vimKeyMap.ts

diff --git a/src/cloud/components/Editor/index.tsx b/src/cloud/components/Editor/index.tsx
index 639530cb0a..cc8924bf23 100644
--- a/src/cloud/components/Editor/index.tsx
+++ b/src/cloud/components/Editor/index.tsx
@@ -104,6 +104,7 @@ import {
   CodeMirrorEditorModeHints,
   getModeSuggestions,
 } from '../../lib/editor/CodeMirror'
+import { copySelectionOnVimCtrlC } from '../../lib/editor/vimKeyMap'
 import { scrollEditorToLine } from '../../lib/hooks/editor/docEditor'
 
 type LayoutMode = 'split' | 'preview' | 'editor'
@@ -269,6 +270,7 @@ const Editor = ({
         Enter: 'newlineAndIndentContinueMarkdownList',
         Tab: 'indentMore',
         'Ctrl-Space': 'autocomplete',
+        'Ctrl-C': copySelectionOnVimCtrlC,
       },
       scrollPastEnd: true,
       // fixes IME being on top of current line, Codemirror issue: https://github.com/codemirror/CodeMirror/issues/3137
diff --git a/src/cloud/lib/editor/vimKeyMap.ts b/src/cloud/lib/editor/vimKeyMap.ts
new file mode 100644
index 0000000000..1cc71a8776
--- /dev/null
+++ b/src/cloud/lib/editor/vimKeyMap.ts
@@ -0,0 +1,9 @@
+import CodeMirror from 'codemirror'
+
+export function copySelectionOnVimCtrlC(cm: CodeMirror.Editor) {
+  if (`${cm.getOption('keyMap')}`.startsWith('vim')) {
+    document.execCommand('copy')
+  }
+
+  return CodeMirror.Pass
+}
diff --git a/src/cloud/lib/hooks/editor/docEditor.ts b/src/cloud/lib/hooks/editor/docEditor.ts
index afc4f3d860..a463ecbb85 100644
--- a/src/cloud/lib/hooks/editor/docEditor.ts
+++ b/src/cloud/lib/hooks/editor/docEditor.ts
@@ -12,6 +12,7 @@ import { SerializedTeam } from '../../../interfaces/db/team'
 import { SerializedTemplate } from '../../../interfaces/db/template'
 import { SerializedUser } from '../../../interfaces/db/user'
 import useRealtime from '../../editor/hooks/useRealtime'
+import { copySelectionOnVimCtrlC } from '../../editor/vimKeyMap'
 import attachFileHandlerToCodeMirrorEditor, {
   OnFileCallback,
 } from '../../editor/plugins/fileHandler'
@@ -132,6 +133,7 @@ export function useDocEditor({
       extraKeys: {
         Enter: 'newlineAndIndentContinueMarkdownList',
         Tab: 'indentMore',
+        'Ctrl-C': copySelectionOnVimCtrlC,
       },
       scrollPastEnd: true,
       // fixes IME being on top of current line, Codemirror issue: https://github.com/codemirror/CodeMirror/issues/3137