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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "ui/aura/client/visibility_client.h"
      6 
      7 #include "ui/aura/root_window.h"
      8 #include "ui/aura/window_property.h"
      9 
     10 DECLARE_WINDOW_PROPERTY_TYPE(aura::client::VisibilityClient*)
     11 
     12 namespace aura {
     13 namespace client {
     14 
     15 // A property key to store a client that handles window visibility changes.
     16 DEFINE_LOCAL_WINDOW_PROPERTY_KEY(
     17     VisibilityClient*, kWindowVisibilityClientKey, NULL);
     18 
     19 
     20 void SetVisibilityClient(Window* window, VisibilityClient* client) {
     21   window->SetProperty(kWindowVisibilityClientKey, client);
     22 }
     23 
     24 VisibilityClient* GetVisibilityClient(Window* window) {
     25   VisibilityClient* visibility_client = NULL;
     26   aura::Window* current = window;
     27   do {
     28     visibility_client = current->GetProperty(kWindowVisibilityClientKey);
     29     current = current->parent();
     30   } while (current && !visibility_client);
     31   return visibility_client;
     32 }
     33 
     34 }  // namespace client
     35 }  // namespace aura
     36