ui/display/chromeos/x11/native_display_event_dispatcher_x11.h

   1 // Copyright 2014 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 UI_DISPLAY_CHROMEOS_X11_NATIVE_DISPLAY_EVENT_DISPATCHER_X11_H_
   6 #define UI_DISPLAY_CHROMEOS_X11_NATIVE_DISPLAY_EVENT_DISPATCHER_X11_H_
   7
   8 #include "base/time/tick_clock.h"
   9 #include "base/time/time.h"
  10 #include "ui/display/chromeos/x11/native_display_delegate_x11.h"
  11 #include "ui/events/platform/platform_event_dispatcher.h"
  12
  13 namespace ui {
  14
  15 // The implementation is interested in the cases of RRNotify events which
  16 // correspond to output add/remove events. Note that Output add/remove events
  17 // are sent in response to our own reconfiguration operations so spurious events
  18 // are common. Spurious events will have no effect.
  19 class DISPLAY_EXPORT NativeDisplayEventDispatcherX11
  20     : public ui::PlatformEventDispatcher {
  21  public:
  22   NativeDisplayEventDispatcherX11(
  23       NativeDisplayDelegateX11::HelperDelegate* delegate,
  24       int xrandr_event_base);
  25   ~NativeDisplayEventDispatcherX11() override;
  26
  27   // ui::PlatformEventDispatcher:
  28   bool CanDispatchEvent(const PlatformEvent& event) override;
  29   uint32_t DispatchEvent(const PlatformEvent& event) override;
  30
  31   void SetTickClockForTest(scoped_ptr<base::TickClock> tick_clock);
  32
  33   // How long the cached output is valid after startup.
  34   static const int kUseCacheAfterStartupMs;
  35
  36  private:
  37   NativeDisplayDelegateX11::HelperDelegate* delegate_;  // Not owned.
  38
  39   // The base of the event numbers used to represent XRandr events used in
  40   // decoding events regarding output add/remove.
  41   int xrandr_event_base_;
  42
  43   base::TimeTicks startup_time_;
  44
  45   scoped_ptr<base::TickClock> tick_clock_;
  46
  47   DISALLOW_COPY_AND_ASSIGN(NativeDisplayEventDispatcherX11);
  48 };
  49
  50 }  // namespace ui
  51
  52 #endif  // UI_DISPLAY_CHROMEOS_X11_NATIVE_DISPLAY_EVENT_DISPATCHER_X11_H_