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 "base/bind.h"
  11 #include "base/bind_helpers.h"
  12 #include "base/memory/scoped_ptr.h"
  13 #include "ui/gfx/win/singleton_hwnd_observer.h"
  14
  15 namespace content {
  16
  17 class TimeZoneMonitorWin : public TimeZoneMonitor {
  18  public:
  19   TimeZoneMonitorWin()
  20       : TimeZoneMonitor(),
  21         singleton_hwnd_observer_(
  22             new gfx::SingletonHwndObserver(base::Bind(
  23                 &TimeZoneMonitorWin::OnWndProc, base::Unretained(this)))) {}
  24
  25   ~TimeZoneMonitorWin() override {}
  26
  27  private:
  28   void OnWndProc(HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam) {
  29     if (message != WM_TIMECHANGE) {
  30       return;
  31     }
  32
  33     NotifyRenderers();
  34   }
  35
  36   scoped_ptr<gfx::SingletonHwndObserver> singleton_hwnd_observer_;
  37
  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