Fix bug #17588 with mouse highlight when an X frame is redisplayed frequently.

 src/xterm.c (x_update_window_end): Don't invalidate the entire
 mouse-highlight info, just signal frame_up_to_date_hook that mouse
 highlight needs to be redisplayed.

1 files changed, 7 insertions, 1 deletions

diff --git a/src/xterm.c b/src/xterm.c
index ee8372fc656..d4bb2256d3b 100644
--- a/src/xterm.c
+++ b/src/xterm.c
@@ -597,7 +597,13 @@ x_update_window_end (struct window *w, bool cursor_on_p,
   /* If a row with mouse-face was overwritten, arrange for
      XTframe_up_to_date to redisplay the mouse highlight.  */
   if (mouse_face_overwritten_p)
-    reset_mouse_highlight (MOUSE_HL_INFO (XFRAME (w->frame)));
+    {
+      Mouse_HLInfo *hlinfo = MOUSE_HL_INFO (XFRAME (w->frame));
+
+      hlinfo->mouse_face_beg_row = hlinfo->mouse_face_beg_col = -1;
+      hlinfo->mouse_face_end_row = hlinfo->mouse_face_end_col = -1;
+      hlinfo->mouse_face_window = Qnil;
+    }
 }