From: Kim F. Storm <storm@cua.dk>
Date: Sat, 10 Mar 2007 01:07:05 +0000 (+0000)
Subject: (redisplay_window): Don't automatically select a new window
X-Git-Tag: emacs-pretest-22.0.96~173
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=b5b772e79d93c0def4dadee9f93cd170d9e69a4f;p=emacs.git

(redisplay_window): Don't automatically select a new window
start for a contination line during mouse-click.
---

diff --git a/src/xdisp.c b/src/xdisp.c
index b018735c3c6..07762f56582 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -13134,8 +13134,15 @@ redisplay_window (window, just_this_one_p)
 
       /* If first window line is a continuation line, and window start
 	 is inside the modified region, but the first change is before
-	 current window start, we must select a new window start.*/
+	 current window start, we must select a new window start.
+
+	 However, if this is the result of a down-mouse event (e.g. by
+	 extending the mouse-drag-overlay), we don't want to select a
+	 new window start, since that would change the position under
+	 the mouse, resulting in an unwanted mouse-movement rather
+	 than a simple mouse-click.  */
       if (NILP (w->start_at_line_beg)
+	  && NILP (do_mouse_tracking)
 	  && CHARPOS (startp) > BEGV)
 	{
 	  /* Make sure beg_unchanged and end_unchanged are up to date.