[gtk/wip/carlosg/broken-grabs: 5/6] gtkmain: Propagate GDK_GRAB_BROKEN events to/from current focus

[Carlos Garnacho <carlosg src gnome org>]

commit 0bb3986b02d5eb86dc606bb6c1e2171ab8c07dac
Author: Carlos Garnacho <carlosg gnome org>
Date:   Tue May 12 10:36:18 2020 +0200

    gtkmain: Propagate GDK_GRAB_BROKEN events to/from current focus
    
    Let keyboard/pointer paths handle their own events, and find the
    current focus. The event will be propagated through instead of
    being just emitted on the toplevel.
    
    This makes it handled throughout all the gestures that want to
    know about it.

 gtk/gtkmain.c | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)
---
diff --git a/gtk/gtkmain.c b/gtk/gtkmain.c
index 518f3aefbf..c008cdb4d6 100644
--- a/gtk/gtkmain.c
+++ b/gtk/gtkmain.c
@@ -1244,11 +1244,17 @@ rewrite_event_for_toplevel (GdkEvent *event)
 {
   GdkSurface *surface;
   GdkKeyEvent *key_event;
+  GdkEventType event_type;
 
   surface = gdk_event_get_surface (event);
   if (!surface->parent)
     return NULL;
 
+  event_type = gdk_event_get_event_type (event);
+  if (event_type != GDK_KEY_PRESS &&
+      event_type != GDK_KEY_RELEASE)
+    return NULL;
+
   while (surface->parent)
     surface = surface->parent;
 
@@ -1456,6 +1462,9 @@ is_pointing_event (GdkEvent *event)
     case GDK_DROP_START:
       return TRUE;
 
+    case GDK_GRAB_BROKEN:
+      return gdk_device_get_source (gdk_event_get_device (event)) != GDK_SOURCE_KEYBOARD;
+
     default:
       return FALSE;
     }
@@ -1470,6 +1479,8 @@ is_key_event (GdkEvent *event)
     case GDK_KEY_RELEASE:
       return TRUE;
       break;
+    case GDK_GRAB_BROKEN:
+      return gdk_device_get_source (gdk_event_get_device (event)) == GDK_SOURCE_KEYBOARD;
     default:
       return FALSE;
     }
@@ -1606,6 +1617,11 @@ handle_pointing_event (GdkEvent *event)
     case GDK_TOUCHPAD_PINCH:
     case GDK_TOUCHPAD_SWIPE:
       break;
+    case GDK_GRAB_BROKEN:
+      target = gtk_window_lookup_effective_pointer_focus_widget (toplevel,
+                                                                 device,
+                                                                 sequence);
+      break;
     default:
       g_assert_not_reached ();
     }
@@ -1724,7 +1740,6 @@ gtk_main_do_event (GdkEvent *event)
       break;
 
     case GDK_FOCUS_CHANGE:
-    case GDK_GRAB_BROKEN:
       if (!_gtk_widget_captured_event (target_widget, event, target_widget))
         gtk_widget_event (target_widget, event, target_widget);
       break;
@@ -1748,6 +1763,7 @@ gtk_main_do_event (GdkEvent *event)
     case GDK_PAD_RING:
     case GDK_PAD_STRIP:
     case GDK_PAD_GROUP_MODE:
+    case GDK_GRAB_BROKEN:
       gtk_propagate_event (grab_widget, event);
       break;