master 96015c9c8c: Make tool bar highlight work correctly during touch events

[Po Lu]

branch: master
commit 96015c9c8cc1720e8ee7cd9cea4de48126dd9122
Author: Po Lu <luangruo@yahoo.com>
Commit: Po Lu <luangruo@yahoo.com>

    Make tool bar highlight work correctly during touch events
    
    * src/xterm.c (handle_one_xevent): Before activating the tool
    bar in response to a touch event, set the mouse highlight to
    that location.  After the touch ends, clear the mouse highlight.
---
 src/xterm.c | 39 ++++++++++++++++++++++++++++++++++++---
 1 file changed, 36 insertions(+), 3 deletions(-)

diff --git a/src/xterm.c b/src/xterm.c
index 6ae7e97f45..1373045393 100644
--- a/src/xterm.c
+++ b/src/xterm.c
@@ -24300,7 +24300,32 @@ handle_one_xevent (struct x_display_info *dpyinfo,
 
                  if (tool_bar_p)
                    {
-                     handle_tool_bar_click (f, x, y, true, 0);
+                     /* Call note_mouse_highlight on the tool bar
+                        item.  Otherwise, get_tool_bar_item will
+                        return 1.
+
+                        This is not necessary when mouse-highlight is
+                        nil.  */
+
+                     if (!NILP (Vmouse_highlight))
+                       {
+                         note_mouse_highlight (f, x, y);
+
+                         /* Always allow future mouse motion to
+                            update the mouse highlight, no matter
+                            where it is.  */
+                         memset (&dpyinfo->last_mouse_glyph, 0,
+                                 sizeof dpyinfo->last_mouse_glyph);
+                         dpyinfo->last_mouse_glyph_frame = f;
+                       }
+
+                     handle_tool_bar_click_with_device (f, x, y, true, 0,
+                                                        (source
+                                                         ? source->name : Qt));
+
+                     /* Flush any changes made by that to the front
+                        buffer.  */
+                     x_flush_dirty_back_buffer_on (f);
 
                      /* Record the device and the touch ID on the
                         frame.  That way, Emacs knows when to dismiss
@@ -24468,8 +24493,16 @@ handle_one_xevent (struct x_display_info *dpyinfo,
                        == xev->detail))
                {
                  if (f->last_tool_bar_item != -1)
-                   handle_tool_bar_click (f, xev->event_x, xev->event_y,
-                                          false, 0);
+                   handle_tool_bar_click_with_device (f, xev->event_x,
+                                                      xev->event_y,
+                                                      false, 0,
+                                                      (source
+                                                       ? source->name
+                                                       : Qnil));
+
+                 /* Cancel any outstanding mouse highlight.  */
+                 note_mouse_highlight (f, -1, -1);
+                 x_flush_dirty_back_buffer_on (f);
 
                  /* Now clear the tool bar device.  */
                  FRAME_OUTPUT_DATA (f)->tool_bar_touch_device = 0;