From eea9b84041054ba4479da0e3bc7464e055fcdf8a Mon Sep 17 00:00:00 2001
From: Thiago Alves <thiagoralves@gmail.com>
Date: Wed, 11 Mar 2026 22:47:19 -0400
Subject: [PATCH] fix: recompute debug inline positions when editor mounts
 during active debug

When an ST tab is opened after the debugger is already running, editorRef
is null during the initial debugVarPositions memo computation. Since ref
changes don't trigger re-renders, the memo never recomputes and no badges
appear. Add an editorMounted state flag set in handleEditorDidMount so the
position-scanning memo re-runs when the editor becomes available.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
---
 .../components/_features/[workspace]/editor/monaco/index.tsx  | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/renderer/components/_features/[workspace]/editor/monaco/index.tsx b/src/renderer/components/_features/[workspace]/editor/monaco/index.tsx
index 31226bac3..a0c678c1d 100644
--- a/src/renderer/components/_features/[workspace]/editor/monaco/index.tsx
+++ b/src/renderer/components/_features/[workspace]/editor/monaco/index.tsx
@@ -114,6 +114,7 @@ const MonacoEditor = (props: monacoEditorProps): ReturnType<typeof PrimitiveEdit
   const editorRef = useRef<null | monaco.editor.IStandaloneCodeEditor>(null)
   const monacoRef = useRef<null | typeof monaco>(null)
   const focusDisposables = useRef<{ onFocus?: monaco.IDisposable; onBlur?: monaco.IDisposable }>({})
+  const [editorMounted, setEditorMounted] = useState(false)
 
   const {
     editor,
@@ -356,7 +357,7 @@ const MonacoEditor = (props: monacoEditorProps): ReturnType<typeof PrimitiveEdit
     }
 
     return { prefix, positions }
-  }, [isDebuggerVisible, debugVarKeySet, language, name, fbInstanceContext])
+  }, [isDebuggerVisible, debugVarKeySet, language, name, fbInstanceContext, editorMounted])
 
   // Phase 2: stamp current values onto cached positions (runs on each poll, O(positions) map lookups only)
   useEffect(() => {
@@ -724,6 +725,7 @@ const MonacoEditor = (props: monacoEditorProps): ReturnType<typeof PrimitiveEdit
   ) {
     editorRef.current = editorInstance
     monacoRef.current = monacoInstance
+    setEditorMounted(true)
 
     if (!editorInstance || !monacoInstance) return