Move mus to //services/ui

components/mus/ws/server_window_drawn_tracker.h

-// Copyright 2015 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.
-
-#ifndef COMPONENTS_MUS_WS_SERVER_WINDOW_DRAWN_TRACKER_H_
-#define COMPONENTS_MUS_WS_SERVER_WINDOW_DRAWN_TRACKER_H_
-
-#include <set>
-
-#include "base/macros.h"
-#include "components/mus/ws/server_window_observer.h"
-
-namespace mus {
-
-namespace ws {
-
-class ServerWindowDrawnTrackerObserver;
-
-// ServerWindowDrawnTracker notifies its observer any time the drawn state of
-// the supplied window changes.
-//
-// NOTE: you must ensure this class is destroyed before the root.
-class ServerWindowDrawnTracker : public ServerWindowObserver {
- public:
-  ServerWindowDrawnTracker(ServerWindow* window,
-                           ServerWindowDrawnTrackerObserver* observer);
-  ~ServerWindowDrawnTracker() override;
-
-  ServerWindow* window() { return window_; }
-
- private:
-  void SetDrawn(ServerWindow* ancestor, bool drawn);
-
-  // Adds |this| as an observer to |window_| and its ancestors.
-  void AddObservers();
-
-  // Stops observerving any windows we added as an observer in AddObservers().
-  void RemoveObservers();
-
-  // ServerWindowObserver:
-  void OnWindowDestroying(ServerWindow* window) override;
-  void OnWindowDestroyed(ServerWindow* window) override;
-  void OnWillChangeWindowHierarchy(ServerWindow* window,
-                                   ServerWindow* new_parent,
-                                   ServerWindow* old_parent) override;
-  void OnWindowHierarchyChanged(ServerWindow* window,
-                                ServerWindow* new_parent,
-                                ServerWindow* old_parent) override;
-  void OnWillChangeWindowVisibility(ServerWindow* window) override;
-  void OnWindowVisibilityChanged(ServerWindow* window) override;
-
-  ServerWindow* window_;
-  ServerWindowDrawnTrackerObserver* observer_;
-  bool drawn_;
-  // Set of windows we're observing. This is |window_| and all its ancestors.
-  std::set<ServerWindow*> windows_;
-
-  DISALLOW_COPY_AND_ASSIGN(ServerWindowDrawnTracker);
-};
-
-}  // namespace ws
-
-}  // namespace mus
-
-#endif  // COMPONENTS_MUS_WS_SERVER_WINDOW_DRAWN_TRACKER_H_