Reorder

mojo/services/public/interfaces/view_manager/view_manager.mojom

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 import "../geometry/geometry.mojom"
 import "../input_events/input_events.mojom"
+import "view_manager_constants.mojom"
 
 module mojo.view_manager {
 
 struct INode {
   uint32 parent_id;
   uint32 node_id;
   uint32 view_id;
   mojo.Rect bounds;
 };
 
@@ skipping 48 matching lines @@
   // |server_change_id| doesn't match, or the node already has no parent.
   //
   // Removing a node from a parent may result in OnNodeDeleted() being sent to
   // other connections. For example, connection A has nodes 1 and 2, with 2 a
   // child of 1. Connection B has a root 1. If 2 is removed from 1 then B gets
   // OnNodeDeleted(). This is done as node 2 is effectively no longer visible to
   // connection B.
   RemoveNodeFromParent(uint32 node_id,
                        uint32 server_change_id) => (bool success);
 
+  // Reorders a node in its parent, relative to |relative_node_id| according to
+  // |direction|.
+  // Only the connection that created the node's parent can reorder its
+  // children.
+  ReorderNode(uint32 node_id,
+              uint32 relative_node_id,
+              OrderDirection direction,
+              uint32 server_change_id) => (bool success);
+
   // Returns the nodes comprising the tree starting at |node_id|. |node_id| is
   // the first result in the return value, unless |node_id| is invalid, in which
   // case an empty vector is returned. The nodes are visited using a depth first
   // search (pre-order).
   GetNodeTree(uint32 node_id) => (INode[] nodes);
 
   // Creates a new view with the specified id. It is up to the client to ensure
   // the id is unique to the connection (the id need not be globally unique).
   // Additionally the connection id (embedded in |view_id|) must match that of
   // the connection.
@@ skipping 56 matching lines @@
   // supplied. See description above ViewManager for details on the change ids.
   // |nodes| contains any nodes that are that the client has not been told
   // about. This is not sent for hierarchy changes of nodes not known to this
   // client or not attached to the tree.
   OnNodeHierarchyChanged(uint32 node,
                          uint32 new_parent,
                          uint32 old_parent,
                          uint32 server_change_id,
                          INode[] nodes);
 
+  // Invoked when the order of nodes within a parent changes.
+  OnNodeReordered(uint32 node_id,
+                  uint32 relative_node_id,
+                  OrderDirection direction,
+                  uint32 server_change_id);                     
+
   // Invoked when a node is deleted.
   OnNodeDeleted(uint32 node, uint32 server_change_id);
 
   // Invoked when the view associated with a node is replaced by another view.
   // 0 is used to identify a null view.
   OnNodeViewReplaced(uint32 node, uint32 new_view_id, uint32 old_view_id);
 
   // Invoked when a view is deleted.
   OnViewDeleted(uint32 view);
 
   // Invoked when an event is targeted at the specified view.
   OnViewInputEvent(uint32 view, mojo.Event event) => ();
 };
 
 }