From: Po Lu <luangruo@yahoo.com>
Date: Wed, 20 Oct 2021 07:36:59 +0000 (+0800)
Subject: Fix tab bar item highlight when a mouse click is dropped
X-Git-Tag: emacs-28.0.90~236
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=29fdc65860e95a6e1c74147a3d310878080f6118;p=emacs.git

Fix tab bar item highlight when a mouse click is dropped

* src/xdisp.c (note_mouse_highlight): Clear last_tab_bar_item if the
movement wasn't made on top of the tab bar.
---

diff --git a/src/xdisp.c b/src/xdisp.c
index 67946a56b47..97ba6721781 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -33652,6 +33652,14 @@ note_mouse_highlight (struct frame *f, int x, int y)
       else
 	return;
     }
+  else
+    {
+      /* The mouse might have pressed into the tab bar, but might
+	 also have been released outside the tab bar, so
+	 f->last_tab_bar_item must be reset, in order to make sure the
+	 item can be still highlighted again in the future.  */
+      f->last_tab_bar_item = -1;
+    }
 #endif
 
 #if defined (HAVE_WINDOW_SYSTEM) && ! defined (HAVE_EXT_TOOL_BAR)