quartz: Ignore events from all mouse buttons past the resize boundary

Before, right click events were still let through into GDK. In this
case, also middle/right button events with x-coordinates in the range
[-3, 0] are processed, resulting in failures/crashes in the window
finding code because no GdkWindows are present in this range.

1 files changed, 21 insertions, 10 deletions

diff --git a/gdk/quartz/gdkevents-quartz.c b/gdk/quartz/gdkevents-quartz.c
index 1927e728bd..9478c16849 100644
--- a/gdk/quartz/gdkevents-quartz.c
+++ b/gdk/quartz/gdkevents-quartz.c
@@ -1119,15 +1119,13 @@ test_resize (NSEvent *event, GdkWindow *toplevel, gint x, gint y)
   GdkWindowImplQuartz *toplevel_impl;
   gboolean lion;
 
-  /* Resizing only begins if an NSLeftMouseButton event is received in
-   * the resizing area. Handle anything else.
+  /* Resizing from the resize indicator only begins if an NSLeftMouseButton
+   * event is received in the resizing area.
    */
-  if ([event type] != NSLeftMouseDown)
-    return FALSE;
-
   toplevel_private = (GdkWindowObject *)toplevel;
   toplevel_impl = (GdkWindowImplQuartz *)toplevel_private->impl;
-  if ([toplevel_impl->toplevel showsResizeIndicator])
+  if ([event type] == NSLeftMouseDown &&
+      [toplevel_impl->toplevel showsResizeIndicator])
     {
       NSRect frame;
 
@@ -1155,12 +1153,25 @@ test_resize (NSEvent *event, GdkWindow *toplevel, gint x, gint y)
    * the selector isRestorable to see if we're on 10.7.
    * This extra check is in case the user starts
    * dragging before GDK recognizes the grab.
+   *
+   * We perform this check for a button press of all buttons, because we
+   * do receive, for instance, a right mouse down event for a GDK window
+   * for x-coordinate range [-3, 0], but we do not want to forward this
+   * into GDK. Forwarding such events into GDK will confuse the pointer
+   * window finding code, because there are no GdkWindows present in
+   * the range [-3, 0].
    */
   lion = gdk_quartz_osx_version () >= GDK_OSX_LION;
-  if (lion && (x < GDK_LION_RESIZE ||
-               x > toplevel_private->width - GDK_LION_RESIZE ||
-               y > toplevel_private->height - GDK_LION_RESIZE))
-    return TRUE;
+  if (lion &&
+      ([event type] == NSLeftMouseDown ||
+       [event type] == NSRightMouseDown ||
+       [event type] == NSOtherMouseDown))
+    {
+      if (x < GDK_LION_RESIZE ||
+          x > toplevel_private->width - GDK_LION_RESIZE ||
+          y > toplevel_private->height - GDK_LION_RESIZE)
+        return TRUE;
+    }
 
   return FALSE;
 }