static GList *
gimp_image_item_list_remove_children (GList *list,
const GimpItem *parent)
{
GList *l = list;
while (l)
{
GimpItem *item = l->data;
l = g_list_next (l);
if (gimp_viewable_is_ancestor (GIMP_VIEWABLE (parent),
GIMP_VIEWABLE (item)))
{
list = g_list_remove (list, item);
}
}
return list;
}
gboolean
gimp_pdb_item_is_not_ancestor (GimpItem *item,
GimpItem *not_descendant,
GError **error)
{
g_return_val_if_fail (GIMP_IS_ITEM (item), FALSE);
g_return_val_if_fail (GIMP_IS_ITEM (not_descendant), FALSE);
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
if (gimp_viewable_is_ancestor (GIMP_VIEWABLE (item),
GIMP_VIEWABLE (not_descendant)))
{
g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT,
_("Item '%s' (%d) must not be an ancestor of "
"'%s' (%d)"),
gimp_object_get_name (item),
gimp_item_get_ID (item),
gimp_object_get_name (not_descendant),
gimp_item_get_ID (not_descendant));
return FALSE;
}
return TRUE;
}
gboolean
gimp_container_tree_view_real_drop_possible (GimpContainerTreeView *tree_view,
GimpDndType src_type,
GimpViewable *src_viewable,
GimpViewable *dest_viewable,
GtkTreePath *drop_path,
GtkTreeViewDropPosition drop_pos,
GtkTreeViewDropPosition *return_drop_pos,
GdkDragAction *return_drag_action)
{
GimpContainerView *view = GIMP_CONTAINER_VIEW (tree_view);
GimpContainer *container = gimp_container_view_get_container (view);
GimpContainer *src_container = NULL;
GimpContainer *dest_container = NULL;
gint src_index = -1;
gint dest_index = -1;
if (src_viewable)
{
GimpViewable *parent = gimp_viewable_get_parent (src_viewable);
if (parent)
src_container = gimp_viewable_get_children (parent);
else if (gimp_container_have (container, GIMP_OBJECT (src_viewable)))
src_container = container;
if (src_container)
src_index = gimp_container_get_child_index (src_container,
GIMP_OBJECT (src_viewable));
}
if (dest_viewable)
{
GimpViewable *parent;
/* dropping on the lower third of a group item drops into that group */
if (drop_pos == GTK_TREE_VIEW_DROP_INTO_OR_AFTER &&
gimp_viewable_get_children (dest_viewable))
{
parent = dest_viewable;
}
else
{
parent = gimp_viewable_get_parent (dest_viewable);
}
if (parent)
dest_container = gimp_viewable_get_children (parent);
else if (gimp_container_have (container, GIMP_OBJECT (dest_viewable)))
dest_container = container;
if (parent == dest_viewable)
dest_index = 0;
else
dest_index = gimp_container_get_child_index (dest_container,
GIMP_OBJECT (dest_viewable));
}
if (src_viewable && g_type_is_a (G_TYPE_FROM_INSTANCE (src_viewable),
gimp_container_get_children_type (container)))
{
if (src_viewable == dest_viewable)
return FALSE;
if (src_index == -1 || dest_index == -1)
return FALSE;
/* don't allow dropping a parent node onto one of its descendants
*/
if (gimp_viewable_is_ancestor (src_viewable, dest_viewable))
return FALSE;
}
if (src_container == dest_container)
{
if (drop_pos == GTK_TREE_VIEW_DROP_BEFORE)
{
if (dest_index == (src_index + 1))
return FALSE;
}
else if (drop_pos == GTK_TREE_VIEW_DROP_AFTER)
{
if (dest_index == (src_index - 1))
return FALSE;
}
}
if (return_drop_pos)
*return_drop_pos = drop_pos;
if (return_drag_action)
{
if (src_viewable && g_type_is_a (G_TYPE_FROM_INSTANCE (src_viewable),
gimp_container_get_children_type (container)))
*return_drag_action = GDK_ACTION_MOVE;
else
*return_drag_action = GDK_ACTION_COPY;
}
return TRUE;
}