[gimp] app: add new virtual function GimpItem::unset_removed()

[Michael Natterer <mitch src gnome org>]

commit 6a08376d4962e7c583e662709ce25d89f0d9dba0
Author: Michael Natterer <mitch gimp org>
Date:   Wed Feb 2 19:40:20 2011 +0100

    app: add new virtual function GimpItem::unset_removed()
    
    and implement it in GimpLayer to unset the removed flag on the layer
    mask. Remove layer mask special casing from gimp_image_add_layer().
    Make sure that all an item's children get their removed flag unset in
    gimp_item_unset_removed().

 app/core/gimpimage.c |   11 -----------
 app/core/gimpitem.c  |   11 +++++++++++
 app/core/gimpitem.h  |    1 +
 app/core/gimplayer.c |   14 ++++++++++++++
 4 files changed, 26 insertions(+), 11 deletions(-)
---
diff --git a/app/core/gimpimage.c b/app/core/gimpimage.c
index e0ab232..5b234f3 100644
--- a/app/core/gimpimage.c
+++ b/app/core/gimpimage.c
@@ -3471,17 +3471,6 @@ gimp_image_add_layer (GimpImage *image,
   if (old_has_alpha != gimp_image_has_alpha (image))
     private->flush_accum.alpha_changed = TRUE;
 
-  if (gimp_layer_get_mask (layer))
-    {
-      GimpLayerMask *mask = gimp_layer_get_mask (layer);
-
-      /*  if the layer came from the undo stack,
-       *  reset the mask's "removed" state
-       */
-      if (gimp_item_is_removed (GIMP_ITEM (mask)))
-        gimp_item_unset_removed (GIMP_ITEM (mask));
-    }
-
   return TRUE;
 }
 
diff --git a/app/core/gimpitem.c b/app/core/gimpitem.c
index c86f1b0..8c35a9c 100644
--- a/app/core/gimpitem.c
+++ b/app/core/gimpitem.c
@@ -215,6 +215,7 @@ gimp_item_class_init (GimpItemClass *klass)
   klass->linked_changed            = NULL;
   klass->lock_content_changed      = NULL;
 
+  klass->unset_removed             = NULL;
   klass->is_attached               = NULL;
   klass->is_content_locked         = gimp_item_real_is_content_locked;
   klass->get_tree                  = NULL;
@@ -738,10 +739,20 @@ gimp_item_is_removed (const GimpItem *item)
 void
 gimp_item_unset_removed (GimpItem *item)
 {
+  GimpContainer *children;
+
   g_return_if_fail (GIMP_IS_ITEM (item));
   g_return_if_fail (gimp_item_is_removed (item));
 
   GET_PRIVATE (item)->removed = FALSE;
+
+  children = gimp_viewable_get_children (GIMP_VIEWABLE (item));
+
+  if (children)
+    gimp_container_foreach (children, (GFunc) gimp_item_unset_removed, NULL);
+
+  if (GIMP_ITEM_GET_CLASS (item)->unset_removed)
+    GIMP_ITEM_GET_CLASS (item)->unset_removed (item);
 }
 
 /**
diff --git a/app/core/gimpitem.h b/app/core/gimpitem.h
index 402758f..5d3ef5a 100644
--- a/app/core/gimpitem.h
+++ b/app/core/gimpitem.h
@@ -50,6 +50,7 @@ struct _GimpItemClass
   void            (* lock_content_changed) (GimpItem             *item);
 
   /*  virtual functions  */
+  void            (* unset_removed)      (GimpItem               *item);
   gboolean        (* is_attached)        (const GimpItem         *item);
   gboolean        (* is_content_locked)  (const GimpItem         *item);
   GimpItemTree  * (* get_tree)           (GimpItem               *item);
diff --git a/app/core/gimplayer.c b/app/core/gimplayer.c
index b27381d..3d46685 100644
--- a/app/core/gimplayer.c
+++ b/app/core/gimplayer.c
@@ -97,6 +97,7 @@ static gchar    * gimp_layer_get_description    (GimpViewable       *viewable,
                                                  gchar             **tooltip);
 
 static void       gimp_layer_removed            (GimpItem           *item);
+static void       gimp_layer_unset_removed      (GimpItem           *item);
 static gboolean   gimp_layer_is_attached        (const GimpItem     *item);
 static GimpItemTree * gimp_layer_get_tree       (GimpItem           *item);
 static GimpItem * gimp_layer_duplicate          (GimpItem           *item,
@@ -249,6 +250,7 @@ gimp_layer_class_init (GimpLayerClass *klass)
   viewable_class->get_description     = gimp_layer_get_description;
 
   item_class->removed                 = gimp_layer_removed;
+  item_class->unset_removed           = gimp_layer_unset_removed;
   item_class->is_attached             = gimp_layer_is_attached;
   item_class->get_tree                = gimp_layer_get_tree;
   item_class->duplicate               = gimp_layer_duplicate;
@@ -493,6 +495,18 @@ gimp_layer_removed (GimpItem *item)
     GIMP_ITEM_CLASS (parent_class)->removed (item);
 }
 
+static void
+gimp_layer_unset_removed (GimpItem *item)
+{
+  GimpLayer *layer = GIMP_LAYER (item);
+
+  if (layer->mask)
+    gimp_item_unset_removed (GIMP_ITEM (layer->mask));
+
+  if (GIMP_ITEM_CLASS (parent_class)->unset_removed)
+    GIMP_ITEM_CLASS (parent_class)->unset_removed (item);
+}
+
 static gboolean
 gimp_layer_is_attached (const GimpItem *item)
 {