content/browser/time_zone_monitor_win.cc

   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 #include "content/browser/time_zone_monitor.h"
   6
   7 #include <windows.h>
   8
   9 #include "base/basictypes.h"
  10 #include "ui/gfx/win/singleton_hwnd.h"
  11
  12 namespace content {
  13
  14 class TimeZoneMonitorWin : public TimeZoneMonitor,
  15                            public gfx::SingletonHwnd::Observer {
  16  public:
  17   TimeZoneMonitorWin() : TimeZoneMonitor() {
  18     gfx::SingletonHwnd::GetInstance()->AddObserver(this);
  19   }
  20
  21   virtual ~TimeZoneMonitorWin() {
  22     gfx::SingletonHwnd::GetInstance()->RemoveObserver(this);
  23   }
  24
  25   // gfx::SingletonHwnd::Observer implementation.
  26   virtual void OnWndProc(HWND hwnd,
  27                          UINT message,
  28                          WPARAM wparam,
  29                          LPARAM lparam) OVERRIDE {
  30     if (message != WM_TIMECHANGE) {
  31       return;
  32     }
  33
  34     NotifyRenderers();
  35   }
  36
  37  private:
  38   DISALLOW_COPY_AND_ASSIGN(TimeZoneMonitorWin);
  39 };
  40
  41 // static
  42 scoped_ptr<TimeZoneMonitor> TimeZoneMonitor::Create() {
  43   return scoped_ptr<TimeZoneMonitor>(new TimeZoneMonitorWin());
  44 }
  45
  46 }  // namespace content