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 #ifndef REMOTING_HOST_RESIZING_HOST_OBSERVER_H_ 6 #define REMOTING_HOST_RESIZING_HOST_OBSERVER_H_ 7 8 #include <stddef.h> 9 10 #include <memory> 11 12 #include "base/macros.h" 13 #include "base/memory/weak_ptr.h" 14 #include "base/time/time.h" 15 #include "base/timer/timer.h" 16 #include "remoting/host/screen_controls.h" 17 #include "remoting/host/screen_resolution.h" 18 19 namespace base { 20 class TickClock; 21 } 22 23 namespace remoting { 24 25 class DesktopResizer; 26 27 // TODO(alexeypa): Rename this class to reflect that it is not 28 // HostStatusObserver any more. 29 30 // Uses the specified DesktopResizer to match host desktop size to the client 31 // view size as closely as is possible. When the connection closes, restores 32 // the original desktop size if restore is true. 33 class ResizingHostObserver : public ScreenControls { 34 public: 35 explicit ResizingHostObserver( 36 std::unique_ptr<DesktopResizer> desktop_resizer, 37 bool restore); 38 ~ResizingHostObserver() override; 39 40 // ScreenControls interface. 41 void SetScreenResolution(const ScreenResolution& resolution) override; 42 43 // Provide a replacement for base::TimeTicks::Now so that this class can be 44 // unit-tested in a timely manner. This function will be called exactly 45 // once for each call to SetScreenResolution. 46 void SetClockForTesting(const base::TickClock* clock); 47 48 private: 49 void RestoreScreenResolution(); 50 51 std::unique_ptr<DesktopResizer> desktop_resizer_; 52 ScreenResolution original_resolution_; 53 bool restore_; 54 55 // State to manage rate-limiting of desktop resizes. 56 base::OneShotTimer deferred_resize_timer_; 57 base::TimeTicks previous_resize_time_; 58 const base::TickClock* clock_; 59 60 base::WeakPtrFactory<ResizingHostObserver> weak_factory_{this}; 61 62 DISALLOW_COPY_AND_ASSIGN(ResizingHostObserver); 63 }; 64 65 } // namespace remoting 66 67 #endif // REMOTING_HOST_RESIZING_HOST_OBSERVER_H_ 68