Merge pull request #27099 from overleaf/mj-no-duplicate-themes

[web] Avoid creating duplicate CM6 themes GitOrigin-RevId: f6132d6cdd94ef353e047ce229d89147acc89603
2025-08-05 08:05:14 +00:00
parent 12586765fb
commit d8f18f9667
5 changed files with 40 additions and 14 deletions
@@ -0,0 +1,18 @@
+import { Extension } from '@codemirror/state'
+import { EditorView } from '@codemirror/view'
+
+export class ThemeCache {
+  private cache: Map<string, Extension> = new Map()
+
+  public get: typeof EditorView.theme = (styleMod, options) => {
+    const key = JSON.stringify({ styleMod, options })
+    const existing = this.cache.get(key)
+    if (existing) {
+      return existing
+    }
+    // eslint-disable-next-line @overleaf/no-generated-editor-themes
+    const theme = EditorView.theme(styleMod, options)
+    this.cache.set(key, theme)
+    return theme
+  }
+}