From e8af2a62fbaa98d0ca9cf0dc84ed84c8f6851219 Mon Sep 17 00:00:00 2001
From: Liu Jinchang <liujinchang@uniontech.com>
Date: Tue, 9 Jun 2026 19:47:16 +0800
Subject: [PATCH] fix(editor): deduplicate blank tab indexes to fix incorrect
 new document naming
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- Add std::unique + erase after sorting in getBlankFileIndex() to remove duplicate index numbers
- Prevent newly created documents from being stuck with the same "Untitled N" name when tabs with duplicate titles are dragged between windows

修复(editor): 对空白标签索引去重以修复新文档命名错误

- 在 getBlankFileIndex() 的排序后增加 std::unique + erase 去除重复的索引编号
- 修复跨窗口拖入同名"未命名文档"标签后，新建文档名称始终为同一编号的问题

Log: 修复跨窗口拖拽标签导致新文档命名计数器异常的 bug
Bug: https://pms.uniontech.com/bug-view-251843.html
---
 src/widgets/window.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/widgets/window.cpp b/src/widgets/window.cpp
index ae126539..848246f7 100644
--- a/src/widgets/window.cpp
+++ b/src/widgets/window.cpp
@@ -3097,6 +3097,9 @@ int Window::getBlankFileIndex()
         }
     }
     std::sort(tabIndexes.begin(), tabIndexes.end());
+    // Remove duplicates to avoid incorrect index calculation when tabs with
+    // the same "Untitled N" name are dragged between windows.
+    tabIndexes.erase(std::unique(tabIndexes.begin(), tabIndexes.end()), tabIndexes.end());
 
     // Return 1 if no blank file exists.
     if (tabIndexes.size() == 0) {