[gtk/wip/carlosg/broken-grabs: 2/6] gdk/wayland: Keep track of implicit grabs

[Carlos Garnacho <carlosg src gnome org>]

commit 9181560f33f990e4caa5cd6216420146a8421fc3
Author: Carlos Garnacho <carlosg gnome org>
Date:   Tue May 12 10:19:47 2020 +0200

    gdk/wayland: Keep track of implicit grabs
    
    Tracking of those broke sometime along the gdk cleanups, so we
    started missing some GDK_GRAB_BROKEN events from being emitted
    (eg. after a button press/implicit grab triggers an active grab).
    
    Implicit grabs are only added if there's no prior grab (either
    implicit through other button presses, or explicit), in order to
    keep accounting correct, make those prevail.

 gdk/gdksurface.c | 26 +++++++++++++++++++++++---
 1 file changed, 23 insertions(+), 3 deletions(-)
---
diff --git a/gdk/gdksurface.c b/gdk/gdksurface.c
index 26a5fe9e90..d0b70b1641 100644
--- a/gdk/gdksurface.c
+++ b/gdk/gdksurface.c
@@ -2293,9 +2293,29 @@ _gdk_windowing_got_event (GdkDisplay *display,
   else if (type == GDK_LEAVE_NOTIFY)
     _gdk_display_set_surface_under_pointer (display, device, NULL);
 
-  if (type == GDK_BUTTON_RELEASE ||
-      type == GDK_TOUCH_CANCEL ||
-      type == GDK_TOUCH_END)
+  if (type == GDK_BUTTON_PRESS)
+    {
+      GdkSurface *grab_surface;
+      gboolean owner_events;
+
+      if (!gdk_device_grab_info (display, device, &grab_surface, &owner_events))
+        {
+          _gdk_display_add_device_grab (display,
+                                        device,
+                                        event_surface,
+                                        GDK_OWNERSHIP_NONE,
+                                        FALSE,
+                                        GDK_ALL_EVENTS_MASK,
+                                        serial,
+                                        gdk_event_get_time (event),
+                                        TRUE);
+          _gdk_display_device_grab_update (display, device,
+                                           source_device, serial);
+        }
+    }
+  else if (type == GDK_BUTTON_RELEASE ||
+           type == GDK_TOUCH_CANCEL ||
+           type == GDK_TOUCH_END)
     {
       if (type == GDK_BUTTON_RELEASE ||
           gdk_event_get_pointer_emulated (event))