[gtk+] Broadway/Quartz/Win32: make event source prepare()/check() note paused status

[Owen Taylor <otaylor src gnome org>]

commit df3e19b449815911acb73ead93a0063a9cfeb3bb
Author: Owen W. Taylor <otaylor fishsoup net>
Date:   Wed Feb 20 12:27:07 2013 -0500

    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 e9aa2c8..a4399c4 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 479cd72..6691744 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 962daf2..7866f31 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 ();