| // 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 SERVICES_UI_WS_SERVER_WINDOW_DRAWN_TRACKER_H_ |
| #define SERVICES_UI_WS_SERVER_WINDOW_DRAWN_TRACKER_H_ |
| |
| #include <set> |
| |
| #include "base/macros.h" |
| #include "base/memory/weak_ptr.h" |
| #include "services/ui/ws/server_window_observer.h" |
| |
| namespace ui { |
| |
| 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* root_ = nullptr; |
| ServerWindow* window_; |
| ServerWindowDrawnTrackerObserver* observer_; |
| bool drawn_; |
| // Set of windows we're observing. This is |window_| and all its ancestors. |
| std::set<ServerWindow*> windows_; |
| |
| base::WeakPtrFactory<ServerWindowDrawnTracker> weak_factory_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ServerWindowDrawnTracker); |
| }; |
| |
| } // namespace ws |
| |
| } // namespace ui |
| |
| #endif // SERVICES_UI_WS_SERVER_WINDOW_DRAWN_TRACKER_H_ |