From f17e341dbc0562508df20b210105b4890dcb75af Mon Sep 17 00:00:00 2001
From: Vanessa <lly219@gmail.com>
Date: Fri, 15 Nov 2024 23:01:54 +0800
Subject: [PATCH] :bug: https://github.com/siyuan-note/siyuan/issues/13113

---
 app/src/protyle/header/Title.ts   |  3 ++-
 app/src/protyle/util/selection.ts | 15 +++++++++++----
 2 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/app/src/protyle/header/Title.ts b/app/src/protyle/header/Title.ts
index d006f1d25..dc8d1c207 100644
--- a/app/src/protyle/header/Title.ts
+++ b/app/src/protyle/header/Title.ts
@@ -105,7 +105,8 @@ export class Title {
             if (event.key === "ArrowDown") {
                 const rects = getSelection().getRangeAt(0).getClientRects();
                 // https://github.com/siyuan-note/siyuan/issues/11729
-                if (this.editElement.getBoundingClientRect().bottom - rects[rects.length - 1].bottom < 25) {
+                if (rects.length === 0 // 标题为空时时
+                    || this.editElement.getBoundingClientRect().bottom - rects[rects.length - 1].bottom < 25) {
                     const noContainerElement = getNoContainerElement(protyle.wysiwyg.element.firstElementChild);
                     // https://github.com/siyuan-note/siyuan/issues/4923
                     if (noContainerElement) {
diff --git a/app/src/protyle/util/selection.ts b/app/src/protyle/util/selection.ts
index 956e9f9e4..a6487b91f 100644
--- a/app/src/protyle/util/selection.ts
+++ b/app/src/protyle/util/selection.ts
@@ -234,10 +234,17 @@ export const getSelectionPosition = (nodeElement: Element, range?: Range) => {
         }
     } else {
         const rects = range.getClientRects(); // 由于长度过长折行，光标在行首时有多个 rects https://github.com/siyuan-note/siyuan/issues/6156
-        return {    // 选中多行不应遮挡第一行 https://github.com/siyuan-note/siyuan/issues/7541
-            left: rects[rects.length - 1].left,
-            top: rects[0].top
-        };
+        if (range.toString()) {
+            return {    // 选中多行不应遮挡第一行 https://github.com/siyuan-note/siyuan/issues/7541
+                left: rects[rects.length - 1].left,
+                top: rects[0].top
+            };
+        } else {
+            return {    // 代码块首 https://github.com/siyuan-note/siyuan/issues/13113
+                left: rects[rects.length - 1].left,
+                top: rects[rects.length - 1].top
+            };
+        }
     }
 
     return {