From d247a8b1065ba67317eff78af3728813df374578 Mon Sep 17 00:00:00 2001
From: KainStar <461345042@qq.com>
Date: Mon, 28 Aug 2023 17:58:56 +0800
Subject: [PATCH] fix(core): keep cursor when switch language (#27)

---
 core/src/components/EditorZone.tsx | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/core/src/components/EditorZone.tsx b/core/src/components/EditorZone.tsx
index 726b9f10..ee7c3a2b 100644
--- a/core/src/components/EditorZone.tsx
+++ b/core/src/components/EditorZone.tsx
@@ -110,6 +110,21 @@ export default function EditorZone(props: {
 
   const [displayLeftBar, setDisplayLeftBar] = useAtom(displayLeftBarAtom)
 
+  const editorCursorPosition = useRef<monacoEditor.Position | null>(null)
+
+  useEffect(() => {
+    if (editor) {
+      // restore cursor position
+      editor.setPosition(editorCursorPosition.current ?? { lineNumber: 1, column: 1 })
+      editor.focus()
+
+      return () => {
+        // save current cursor position
+        editorCursorPosition.current = editor.getPosition() ?? null
+      }
+    }
+  }, [language, editor])
+
   useEffect(() => {
     if (!monaco || !editor) return