[mutter] compositor: Ensure child actors are included in picking

[Carlos Garnacho <carlosg src gnome org>]

commit 700d3679372e9287952b3eea30727d015c745849
Author: Carlos Garnacho <carlosg gnome org>
Date:   Mon Oct 20 18:44:55 2014 +0200

    compositor: Ensure child actors are included in picking
    
    If the actor surface has an input mask, custom picking is implemented
    for the portions affected by the mask, although the child actors (most
    usually subsurfaces) are left out.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=738890

 src/compositor/meta-surface-actor.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)
---
diff --git a/src/compositor/meta-surface-actor.c b/src/compositor/meta-surface-actor.c
index bb85478..b51a5a7 100644
--- a/src/compositor/meta-surface-actor.c
+++ b/src/compositor/meta-surface-actor.c
@@ -65,6 +65,8 @@ meta_surface_actor_pick (ClutterActor       *actor,
       CoglContext *ctx;
       CoglFramebuffer *fb;
       CoglColor cogl_color;
+      ClutterActorIter iter;
+      ClutterActor *child;
 
       n_rects = cairo_region_num_rectangles (priv->input_region);
       rectangles = g_alloca (sizeof (float) * 4 * n_rects);
@@ -91,6 +93,11 @@ meta_surface_actor_pick (ClutterActor       *actor,
       cogl_pipeline_set_color (pipeline, &cogl_color);
       cogl_framebuffer_draw_rectangles (fb, pipeline, rectangles, n_rects);
       cogl_object_unref (pipeline);
+
+      clutter_actor_iter_init (&iter, actor);
+
+      while (clutter_actor_iter_next (&iter, &child))
+        clutter_actor_paint (child);
     }
 }