[gnome-shell] st: Account for children in StWidget's get_paint_volume

[Jasper St. Pierre <jstpierre src gnome org>]

commit be3eb308b9b13ab3bd44589bbf8817c1c0c9ea91
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Mon Feb 13 15:05:38 2012 -0500

    st: Account for children in StWidget's get_paint_volume
    
    Now that StWidget is a group of sorts, it needs to account for its children
    in its paint volume. Unfortunately, this causes havoc for StBoxLayout, so it
    needs fixing - it's unknown why it worked when chaining up to near-identical
    code in StContainer.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=670034

 src/st/st-box-layout.c |   21 ++++++++++++++++++---
 src/st/st-container.c  |   34 ----------------------------------
 src/st/st-widget.c     |   20 ++++++++++++++++++++
 3 files changed, 38 insertions(+), 37 deletions(-)
---
diff --git a/src/st/st-box-layout.c b/src/st/st-box-layout.c
index 19a2d46..86f1388 100644
--- a/src/st/st-box-layout.c
+++ b/src/st/st-box-layout.c
@@ -991,8 +991,25 @@ st_box_layout_get_paint_volume (ClutterActor       *actor,
 {
   StBoxLayout *self = ST_BOX_LAYOUT (actor);
   gdouble x, y;
+  StBoxLayoutPrivate *priv = self->priv;
+  StThemeNode *theme_node = st_widget_get_theme_node (ST_WIDGET (actor));
+  ClutterActorBox allocation_box;
+  ClutterActorBox content_box;
+  ClutterVertex origin;
 
-  if (!CLUTTER_ACTOR_CLASS (st_box_layout_parent_class)->get_paint_volume (actor, volume))
+  /* When have an adjustment we are clipped to the content box, so base
+   * our paint volume on that. */
+  if (priv->hadjustment || priv->vadjustment)
+    {
+      clutter_actor_get_allocation_box (actor, &allocation_box);
+      st_theme_node_get_content_box (theme_node, &allocation_box, &content_box);
+      origin.x = content_box.x1 - allocation_box.x1;
+      origin.y = content_box.y1 - allocation_box.y2;
+      origin.z = 0.f;
+      clutter_paint_volume_set_width (volume, content_box.x2 - content_box.x1);
+      clutter_paint_volume_set_height (volume, content_box.y2 - content_box.y1);
+    }
+  else if (!CLUTTER_ACTOR_CLASS (st_box_layout_parent_class)->get_paint_volume (actor, volume))
     return FALSE;
 
   /* When scrolled, st_box_layout_apply_transform() includes the scroll offset
@@ -1003,8 +1020,6 @@ st_box_layout_get_paint_volume (ClutterActor       *actor,
   get_border_paint_offsets (self, &x, &y);
   if (x != 0 || y != 0)
     {
-      ClutterVertex origin;
-
       clutter_paint_volume_get_origin (volume, &origin);
       origin.x += x;
       origin.y += y;
diff --git a/src/st/st-container.c b/src/st/st-container.c
index a670111..61beaa0 100644
--- a/src/st/st-container.c
+++ b/src/st/st-container.c
@@ -30,37 +30,6 @@
 
 G_DEFINE_ABSTRACT_TYPE (StContainer, st_container, ST_TYPE_WIDGET);
 
-static gboolean
-st_container_get_paint_volume (ClutterActor *actor,
-                               ClutterPaintVolume *volume)
-{
-  if (!CLUTTER_ACTOR_CLASS (st_container_parent_class)->get_paint_volume (actor, volume))
-    return FALSE;
-
-  if (!clutter_actor_get_clip_to_allocation (actor))
-    {
-      ClutterActor *child;
-
-      /* Based on ClutterGroup/ClutterBox; include the children's
-       * paint volumes, since they may paint outside our allocation.
-       */
-      for (child = clutter_actor_get_first_child (actor);
-           child != NULL;
-           child = clutter_actor_get_next_sibling (child))
-        {
-          const ClutterPaintVolume *child_volume;
-
-          child_volume = clutter_actor_get_transformed_paint_volume (child, actor);
-          if (!child_volume)
-            return FALSE;
-
-          clutter_paint_volume_union (volume, child_volume);
-        }
-    }
-
-  return TRUE;
-}
-
 static void
 st_container_init (StContainer *container)
 {
@@ -69,7 +38,4 @@ st_container_init (StContainer *container)
 static void
 st_container_class_init (StContainerClass *klass)
 {
-  ClutterActorClass *actor_class = CLUTTER_ACTOR_CLASS (klass);
-
-  actor_class->get_paint_volume = st_container_get_paint_volume;
 }
diff --git a/src/st/st-widget.c b/src/st/st-widget.c
index 5c88cdb..6f3a76f 100644
--- a/src/st/st-widget.c
+++ b/src/st/st-widget.c
@@ -713,6 +713,26 @@ st_widget_get_paint_volume (ClutterActor *self,
   clutter_paint_volume_set_width (volume, paint_box.x2 - paint_box.x1);
   clutter_paint_volume_set_height (volume, paint_box.y2 - paint_box.y1);
 
+  if (!clutter_actor_get_clip_to_allocation (self))
+    {
+      ClutterActor *child;
+      /* Based on ClutterGroup/ClutterBox; include the children's
+       * paint volumes, since they may paint outside our allocation.
+       */
+      for (child = clutter_actor_get_first_child (self);
+           child != NULL;
+           child = clutter_actor_get_next_sibling (child))
+        {
+          const ClutterPaintVolume *child_volume;
+
+          child_volume = clutter_actor_get_transformed_paint_volume (child, self);
+          if (!child_volume)
+            return FALSE;
+
+          clutter_paint_volume_union (volume, child_volume);
+        }
+    }
+
   return TRUE;
 }