[gtk/wip/matthiasc/sortlistmodel] gdk: Don't emit size-changed unless it changed

[Matthias Clasen <matthiasc src gnome org>]

commit 9b1dde64e3ba9a8434d8b565538642456459370e
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat Jul 11 11:16:35 2020 -0400

    gdk: Don't emit size-changed unless it changed
    
    This really should be handled before we even create
    the event, but at least we can stop it from reaching GTK.

 gdk/gdksurface.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)
---
diff --git a/gdk/gdksurface.c b/gdk/gdksurface.c
index 96302ea630..d630e5d14f 100644
--- a/gdk/gdksurface.c
+++ b/gdk/gdksurface.c
@@ -2861,6 +2861,7 @@ gdk_surface_handle_event (GdkEvent *event)
 {
   gint64 begin_time = g_get_monotonic_time ();
   gboolean handled = FALSE;
+  GdkSurface *surface = gdk_event_get_surface (event);
 
   if (check_autohide (event))
     return TRUE;
@@ -2870,13 +2871,13 @@ gdk_surface_handle_event (GdkEvent *event)
       int width, height;
 
       gdk_configure_event_get_size (event, &width, &height);
-      g_signal_emit (gdk_event_get_surface (event), signals[SIZE_CHANGED], 0,
-                     width, height);
+      if (width != surface->width || height != surface->height)
+        g_signal_emit (surface, signals[SIZE_CHANGED], 0, width, height);
       handled = TRUE;
     }
   else
     {
-      g_signal_emit (gdk_event_get_surface (event), signals[EVENT], 0, event, &handled);
+      g_signal_emit (surface, signals[EVENT], 0, event, &handled);
     }
 
   if (GDK_PROFILER_IS_RUNNING)