From df3e19b449815911acb73ead93a0063a9cfeb3bb Mon Sep 17 00:00:00 2001
From: "Owen W. Taylor" <otaylor@fishsoup.net>
Date: Wed, 20 Feb 2013 12:27:07 -0500
Subject: [PATCH] Broadway/Quartz/Win32: make event source prepare()/check()
 note paused status

When events are paused, we should not return TRUE from prepare() or check().
GTK+ handles this for events that are already in the GTK+ queue, but
we also need suppress checks for events that are in the system queue - if we
return TRUE indicating that there are events in the system queue, then we'll
call dispatch(), and do nothing. The event source will spin, and will never
run the other phases of the paint clock.

(Broadway doesn't have a window system queue separate from the GDK event queue,
but we write the function the same way for consistency.)

https://bugzilla.gnome.org/show_bug.cgi?id=694274
---
 gdk/broadway/gdkeventsource.c    | 10 ++++++++--
 gdk/quartz/gdkeventloop-quartz.c | 14 ++++++++++----
 gdk/win32/gdkevents-win32.c      | 25 +++++++++++++------------
 3 files changed, 31 insertions(+), 18 deletions(-)

diff --git a/gdk/broadway/gdkeventsource.c b/gdk/broadway/gdkeventsource.c
index e9aa2c86b3..a4399c431e 100644
--- a/gdk/broadway/gdkeventsource.c
+++ b/gdk/broadway/gdkeventsource.c
@@ -61,7 +61,11 @@ gdk_event_source_prepare (GSource *source,
   gdk_threads_enter ();
 
   *timeout = -1;
-  retval = (_gdk_event_queue_find_first (display) != NULL);
+
+  if (display->event_pause_count > 0)
+    retval = FALSE;
+  else
+    retval = (_gdk_event_queue_find_first (display) != NULL);
 
   gdk_threads_leave ();
 
@@ -76,7 +80,9 @@ gdk_event_source_check (GSource *source)
 
   gdk_threads_enter ();
 
-  if (event_source->event_poll_fd.revents & G_IO_IN)
+  if (event_source->display->event_pause_count > 0)
+    retval = FALSE;
+  else if (event_source->event_poll_fd.revents & G_IO_IN)
     retval = (_gdk_event_queue_find_first (event_source->display) != NULL);
   else
     retval = FALSE;
diff --git a/gdk/quartz/gdkeventloop-quartz.c b/gdk/quartz/gdkeventloop-quartz.c
index 479cd72a7e..6691744f2c 100644
--- a/gdk/quartz/gdkeventloop-quartz.c
+++ b/gdk/quartz/gdkeventloop-quartz.c
@@ -620,8 +620,11 @@ gdk_event_prepare (GSource *source,
   
   *timeout = -1;
 
-  retval = (_gdk_event_queue_find_first (_gdk_display) != NULL ||
-	    _gdk_quartz_event_loop_check_pending ());
+  if (display->event_pause_count > 0)
+    retval = FALSE;
+  else
+    retval = (_gdk_event_queue_find_first (_gdk_display) != NULL ||
+              _gdk_quartz_event_loop_check_pending ());
 
   gdk_threads_leave ();
 
@@ -635,8 +638,11 @@ gdk_event_check (GSource *source)
 
   gdk_threads_enter ();
 
-  retval = (_gdk_event_queue_find_first (_gdk_display) != NULL ||
-	    _gdk_quartz_event_loop_check_pending ());
+  if (display->event_pause_count > 0)
+    retval = FALSE;
+  else
+    retval = (_gdk_event_queue_find_first (_gdk_display) != NULL ||
+              _gdk_quartz_event_loop_check_pending ());
 
   gdk_threads_leave ();
 
diff --git a/gdk/win32/gdkevents-win32.c b/gdk/win32/gdkevents-win32.c
index 962daf2d09..7866f31771 100644
--- a/gdk/win32/gdkevents-win32.c
+++ b/gdk/win32/gdkevents-win32.c
@@ -3330,9 +3330,12 @@ gdk_event_prepare (GSource *source,
 
   *timeout = -1;
 
-  retval = (_gdk_event_queue_find_first (_gdk_display) != NULL ||
-	    (modal_win32_dialog == NULL &&
-	     GetQueueStatus (QS_ALLINPUT) != 0));
+  if (display->event_pause_count > 0)
+    retval = FALSE;
+  else
+    retval = (_gdk_event_queue_find_first (_gdk_display) != NULL ||
+              (modal_win32_dialog == NULL &&
+               GetQueueStatus (QS_ALLINPUT) != 0));
 
   gdk_threads_leave ();
 
@@ -3346,16 +3349,14 @@ gdk_event_check (GSource *source)
   
   gdk_threads_enter ();
 
-  if (event_poll_fd.revents & G_IO_IN)
-    {
-      retval = (_gdk_event_queue_find_first (_gdk_display) != NULL ||
-		(modal_win32_dialog == NULL &&
-		 GetQueueStatus (QS_ALLINPUT) != 0));
-    }
+  if (display->event_pause_count > 0)
+    retval = FALSE;
+  else if (event_poll_fd.revents & G_IO_IN)
+    retval = (_gdk_event_queue_find_first (_gdk_display) != NULL ||
+              (modal_win32_dialog == NULL &&
+               GetQueueStatus (QS_ALLINPUT) != 0));
   else
-    {
-      retval = FALSE;
-    }
+    retval = FALSE;
 
   gdk_threads_leave ();