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x11: add missing checks that a hint is supported

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Before acting on any hint that is set by the window manager we must
first check that the hint is supported by the current window manager.
Checking that a property has a value is insufficient as it may have
been set by a previous window manager which did support the hint.

https://bugzilla.gnome.org/show_bug.cgi?id=691515
This commit is contained in:
Geoff Reedy
2013-01-09 21:40:04 -07:00
committed by Matthias Clasen
parent 246438812a
commit 2fcbe3a9b4
2 changed files with 17 additions and 3 deletions
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8
gdk/x11/gdkscreen-x11.c
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@ -280,6 +280,10 @@ get_current_desktop (GdkScreen *screen)
unsigned char *data_return = NULL;
int workspace = 0;
if (!gdk_x11_screen_supports_net_wm_hint (screen,
gdk_atom_intern_static_string ("_NET_CURRENT_DESKTOP")))
return workspace;
display = GDK_DISPLAY_XDISPLAY (gdk_screen_get_display (screen));
win = XRootWindow (display, GDK_SCREEN_XNUMBER (screen));
@ -330,6 +334,10 @@ get_work_area (GdkScreen *screen,
area->width = gdk_screen_get_width (screen);
area->height = gdk_screen_get_height (screen);
if (!gdk_x11_screen_supports_net_wm_hint (screen,
gdk_atom_intern_static_string ("_NET_WORKAREA")))
return;
if (workarea == None)
return;