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MetaWindowGroup: fix paint volume
In the past, MetaWindowGroup was allocated the size of the screen and painted the size of the screen because it contained the screen background, but now we also have the "top window group" which contains only popup windows, so the allocation doesn't properly reflect the paint bounds of the window group. Compute the paint bounds accurately from the children. https://bugzilla.gnome.org/show_bug.cgi?id=719669
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@ -199,11 +199,30 @@ meta_window_group_paint (ClutterActor *actor)
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meta_cullable_reset_culling (META_CULLABLE (window_group));
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}
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/* Adapted from clutter_actor_update_default_paint_volume() */
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static gboolean
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meta_window_group_get_paint_volume (ClutterActor *actor,
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meta_window_group_get_paint_volume (ClutterActor *self,
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ClutterPaintVolume *volume)
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{
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return clutter_paint_volume_set_from_allocation (volume, actor);
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ClutterActorIter iter;
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ClutterActor *child;
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clutter_actor_iter_init (&iter, self);
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while (clutter_actor_iter_next (&iter, &child))
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{
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const ClutterPaintVolume *child_volume;
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if (!CLUTTER_ACTOR_IS_MAPPED (child))
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continue;
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child_volume = clutter_actor_get_transformed_paint_volume (child, self);
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if (child_volume == NULL)
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return FALSE;
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clutter_paint_volume_union (volume, child_volume);
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}
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return TRUE;
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}
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static void
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