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Add support for an extended style of _NET_WM_SYNC_REQUEST_COUNTER

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If an application provides two values in _NET_WM_SYNC_REQUEST_COUNTER,
use that as a signal that the applications wants an extended behavior
where it can update the counter as well as the window manager. If the
application updates the counter to an odd value, updates of the
window are frozen until the counter is updated again to an even value.

https://bugzilla.gnome.org/show_bug.cgi?id=685463
This commit is contained in:
Owen W. Taylor
2011-06-08 13:58:54 -04:00
parent 7d43bde019
commit 70c0d39fa7
5 changed files with 88 additions and 24 deletions
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8
src/core/window-private.h
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@@ -352,13 +352,17 @@ struct _MetaWindow
/* if non-NULL, the opaque region _NET_WM_OPAQUE_REGION */
cairo_region_t *opaque_region;
/* if TRUE, the we have the new form of sync request counter which
* also handles application frames */
guint extended_sync_request_counter : 1;
/* Note: can be NULL */
GSList *struts;
#ifdef HAVE_XSYNC
/* XSync update counter */
XSyncCounter sync_request_counter;
guint sync_request_serial;
gint64 sync_request_serial;
GTimeVal sync_request_time;
/* alarm monitoring client's _NET_WM_SYNC_REQUEST_COUNTER */
XSyncAlarm sync_request_alarm;
@@ -607,7 +611,7 @@ void meta_window_set_gravity (MetaWindow *window,
#ifdef HAVE_XSYNC
void meta_window_update_sync_request_counter (MetaWindow *window,
guint64 new_counter_value);
gint64 new_counter_value);
#endif /* HAVE_XSYNC */
void meta_window_handle_mouse_grab_op_event (MetaWindow *window,