From 6ce8915e6c5ac220804a09e97156ccccc03ed1e4 Mon Sep 17 00:00:00 2001
From: xfy <i@rua.plus>
Date: Tue, 16 Jun 2026 16:13:46 +0800
Subject: [PATCH] =?UTF-8?q?fix(editor):=20=E4=BF=AE=E5=A4=8D=20focus()=20?=
 =?UTF-8?q?=E6=8A=8A=E6=BA=90=E7=A0=81=E8=A7=86=E5=9B=BE=E6=BB=9A=E5=8A=A8?=
 =?UTF-8?q?=E5=88=B0=E5=BA=95=E9=83=A8?=
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切换到源码模式时 sourceTextarea.focus() 会触发浏览器将光标
所在行滚动进可视区域，光标默认在内容末尾，导致 textarea 被
拉到底部覆盖已设的滚动位置。改为 focus 后立即恢复 scrollTop。

同时移除调试日志。
---
 libs/tiptap-editor/src/index.ts | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/libs/tiptap-editor/src/index.ts b/libs/tiptap-editor/src/index.ts
index b5949f0..90f1b05 100644
--- a/libs/tiptap-editor/src/index.ts
+++ b/libs/tiptap-editor/src/index.ts
@@ -166,7 +166,11 @@ class TiptapEditorInstance {
       proseMirrorDom.style.display = 'none'
       this.sourceTextarea.hidden = false
       this.applyScrollRatio(this.sourceTextarea, pmRatio)
+      // focus() 会触发浏览器把光标所在行滚动进可视区域，光标默认在内容末尾，
+      // 会把 textarea 拉到底部覆盖上面设好的滚动位置。因此先记录、focus 后再恢复。
+      const scrollTopBeforeFocus = this.sourceTextarea.scrollTop
       this.sourceTextarea.focus()
+      this.sourceTextarea.scrollTop = scrollTopBeforeFocus
       this.toggleButton.textContent = '✎'
       this.toggleButton.title = '切换富文本'
       this.isSourceMode = true