[gtk+/wip/carlosg/event-delivery: 93/104] gdk: Remove synthetic crossing event emission due to geometry changes

[Carlos Garnacho <carlosg src gnome org>]

commit 3a15c8241ec14df3e930a8fb4120bd892259637c
Author: Carlos Garnacho <carlosg gnome org>
Date:   Sun May 14 21:34:15 2017 +0200

    gdk: Remove synthetic crossing event emission due to geometry changes
    
    This just applied to child windows, but now GDK should just take care of
    toplevels, which shall get crossing events from the windowing when the right
    conditions apply.
    
    Removing this code fixes confused crossing state in widgets and messed up
    window_under_pointer tracking (Which now is meant to be toplevels) when any
    of the remaining child GdkWindows trigger these crossing events.

 gdk/gdkinternals.h |    3 -
 gdk/gdkwindow.c    |  143 +---------------------------------------------------
 2 files changed, 1 insertions(+), 145 deletions(-)
---
diff --git a/gdk/gdkinternals.h b/gdk/gdkinternals.h
index 56c26d2..c5d0406 100644
--- a/gdk/gdkinternals.h
+++ b/gdk/gdkinternals.h
@@ -436,9 +436,6 @@ void _gdk_display_set_window_under_pointer (GdkDisplay *display,
                                             GdkDevice  *device,
                                             GdkWindow  *window);
 
-
-void _gdk_synthesize_crossing_events_for_geometry_change (GdkWindow *changed_window);
-
 gboolean    _gdk_window_has_impl (GdkWindow *window);
 GdkWindow * _gdk_window_get_impl_window (GdkWindow *window);
 
diff --git a/gdk/gdkwindow.c b/gdk/gdkwindow.c
index b117e09..cbfbc02 100644
--- a/gdk/gdkwindow.c
+++ b/gdk/gdkwindow.c
@@ -3624,10 +3624,7 @@ gdk_window_show_internal (GdkWindow *window, gboolean raise)
       gdk_window_update_visibility_recursively (window, NULL);
 
       if (gdk_window_is_viewable (window))
-       {
-         _gdk_synthesize_crossing_events_for_geometry_change (window);
-         gdk_window_invalidate_rect_full (window, NULL, TRUE);
-       }
+        gdk_window_invalidate_rect_full (window, NULL, TRUE);
     }
 }
 
@@ -3749,7 +3746,6 @@ gdk_window_lower (GdkWindow *window)
   /* Keep children in (reverse) stacking order */
   gdk_window_lower_internal (window);
 
-  _gdk_synthesize_crossing_events_for_geometry_change (window);
   gdk_window_invalidate_in_parent (window);
 }
 
@@ -3823,7 +3819,6 @@ gdk_window_restack (GdkWindow     *window,
                                                     &window->children_list_node);
     }
 
-  _gdk_synthesize_crossing_events_for_geometry_change (window);
   gdk_window_invalidate_in_parent (window);
 }
 
@@ -3936,8 +3931,6 @@ G_GNUC_END_IGNORE_DEPRECATIONS
 
       if (window->parent && window->parent->event_mask & GDK_SUBSTRUCTURE_MASK)
        _gdk_make_event (window, GDK_UNMAP, NULL, FALSE);
-
-      _gdk_synthesize_crossing_events_for_geometry_change (window->parent);
     }
 
   /* Invalidate the rect */
@@ -3978,8 +3971,6 @@ gdk_window_withdraw (GdkWindow *window)
 
          if (window->parent && window->parent->event_mask & GDK_SUBSTRUCTURE_MASK)
            _gdk_make_event (window, GDK_UNMAP, NULL, FALSE);
-
-         _gdk_synthesize_crossing_events_for_geometry_change (window->parent);
        }
 
       recompute_visible_regions (window, FALSE);
@@ -4192,8 +4183,6 @@ gdk_window_move_resize_toplevel (GdkWindow *window,
       cairo_region_destroy (old_region);
       cairo_region_destroy (new_region);
     }
-
-  _gdk_synthesize_crossing_events_for_geometry_change (window);
 }
 
 
@@ -4284,8 +4273,6 @@ gdk_window_move_resize_internal (GdkWindow *window,
       cairo_region_destroy (old_region);
       cairo_region_destroy (new_region);
     }
-
-  _gdk_synthesize_crossing_events_for_geometry_change (window);
 }
 
 
@@ -4465,8 +4452,6 @@ gdk_window_scroll (GdkWindow *window,
   recompute_visible_regions (window, TRUE);
 
   gdk_window_invalidate_rect_full (window, NULL, TRUE);
-
-  _gdk_synthesize_crossing_events_for_geometry_change (window);
 }
 
 /**
@@ -5138,9 +5123,6 @@ gdk_window_input_shape_combine_region (GdkWindow       *window,
       impl_class = GDK_WINDOW_IMPL_GET_CLASS (window->impl);
       impl_class->input_shape_combine_region (window, window->input_shape, 0, 0);
     }
-
-  /* Pointer may have e.g. moved outside window due to the input mask change */
-  _gdk_synthesize_crossing_events_for_geometry_change (window);
 }
 
 static void
@@ -5221,9 +5203,6 @@ gdk_window_set_pass_through (GdkWindow *window,
   g_return_if_fail (GDK_IS_WINDOW (window));
 
   window->pass_through = !!pass_through;
-
-  /* Pointer may have e.g. moved outside window due to the input region change */
-  _gdk_synthesize_crossing_events_for_geometry_change (window);
 }
 
 /**
@@ -6217,42 +6196,6 @@ _gdk_synthesize_crossing_events (GdkDisplay                 *display,
     }
 }
 
-/* Returns the window inside the event window with the pointer in it
- * at the specified coordinates, or NULL if its not in any child of
- * the toplevel. It also takes into account !owner_events grabs.
- */
-static GdkWindow *
-get_pointer_window (GdkDisplay *display,
-                   GdkWindow *event_window,
-                    GdkDevice *device,
-                   gdouble toplevel_x,
-                   gdouble toplevel_y,
-                   gulong serial)
-{
-  GdkWindow *pointer_window;
-  GdkDeviceGrabInfo *grab;
-  GdkPointerWindowInfo *pointer_info;
-
-  pointer_info = _gdk_display_get_pointer_info (display, device);
-
-  if (event_window == pointer_info->toplevel_under_pointer)
-    pointer_window =
-      _gdk_window_find_descendant_at (event_window,
-                                     toplevel_x, toplevel_y,
-                                     NULL, NULL);
-  else
-    pointer_window = NULL;
-
-  grab = _gdk_display_has_device_grab (display, device, serial);
-  if (grab != NULL &&
-      !grab->owner_events &&
-      pointer_window != grab->window &&
-      !gdk_window_is_ancestor (pointer_window, grab->window))
-    pointer_window = NULL;
-
-  return pointer_window;
-}
-
 void
 _gdk_display_set_window_under_pointer (GdkDisplay *display,
                                        GdkDevice  *device,
@@ -6416,90 +6359,6 @@ gdk_window_get_source_events (GdkWindow      *window,
                                                 GUINT_TO_POINTER (source)));
 }
 
-static gboolean
-do_synthesize_crossing_event (gpointer data)
-{
-  GdkDisplay *display;
-  GdkWindow *changed_toplevel;
-  GHashTableIter iter;
-  gpointer key, value;
-  gulong serial;
-
-  changed_toplevel = data;
-
-  changed_toplevel->synthesize_crossing_event_queued = FALSE;
-
-  if (GDK_WINDOW_DESTROYED (changed_toplevel))
-    return FALSE;
-
-  display = gdk_window_get_display (changed_toplevel);
-  serial = _gdk_display_get_next_serial (display);
-  g_hash_table_iter_init (&iter, display->pointers_info);
-
-  while (g_hash_table_iter_next (&iter, &key, &value))
-    {
-      GdkWindow *new_window_under_pointer;
-      GdkPointerWindowInfo *pointer_info = value;
-      GdkDevice *device = key;
-
-      if (changed_toplevel == pointer_info->toplevel_under_pointer)
-        {
-          new_window_under_pointer =
-            get_pointer_window (display, changed_toplevel,
-                                device,
-                                pointer_info->toplevel_x,
-                                pointer_info->toplevel_y,
-                                serial);
-          if (new_window_under_pointer != pointer_info->window_under_pointer)
-            {
-              GdkDevice *source_device;
-
-              if (pointer_info->last_slave)
-                source_device = pointer_info->last_slave;
-              else
-                source_device = device;
-
-              _gdk_synthesize_crossing_events (display,
-                                               pointer_info->window_under_pointer,
-                                               new_window_under_pointer,
-                                               device, source_device,
-                                               GDK_CROSSING_NORMAL,
-                                               pointer_info->toplevel_x,
-                                               pointer_info->toplevel_y,
-                                               pointer_info->state,
-                                               GDK_CURRENT_TIME,
-                                               NULL,
-                                               serial,
-                                               FALSE);
-              _gdk_display_set_window_under_pointer (display, device, new_window_under_pointer);
-            }
-        }
-    }
-
-  return FALSE;
-}
-
-void
-_gdk_synthesize_crossing_events_for_geometry_change (GdkWindow *changed_window)
-{
-  GdkWindow *toplevel;
-
-  toplevel = get_event_toplevel (changed_window);
-
-  if (!toplevel->synthesize_crossing_event_queued)
-    {
-      guint id;
-
-      toplevel->synthesize_crossing_event_queued = TRUE;
-
-      id = gdk_threads_add_idle_full (GDK_PRIORITY_EVENTS - 1,
-                                      do_synthesize_crossing_event,
-                                      g_object_ref (toplevel),
-                                      g_object_unref);
-      g_source_set_name_by_id (id, "[gtk+] do_synthesize_crossing_event");
-    }
-}
-
 #define GDK_ANY_BUTTON_MASK (GDK_BUTTON1_MASK | \
                             GDK_BUTTON2_MASK | \
                             GDK_BUTTON3_MASK | \