content/browser/system_message_window_win.h

   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 CONTENT_BROWSER_SYSTEM_MESSAGE_WINDOW_WIN_H_
   6 #define CONTENT_BROWSER_SYSTEM_MESSAGE_WINDOW_WIN_H_
   7
   8 #include <windows.h>
   9
  10 #include "base/basictypes.h"
  11 #include "base/memory/scoped_ptr.h"
  12 #include "base/profiler/scoped_tracker.h"
  13 #include "content/common/content_export.h"
  14
  15 namespace content {
  16
  17 class CONTENT_EXPORT SystemMessageWindowWin {
  18  public:
  19   SystemMessageWindowWin();
  20
  21   virtual ~SystemMessageWindowWin();
  22
  23   virtual LRESULT OnDeviceChange(UINT event_type, LPARAM data);
  24
  25  private:
  26   void Init();
  27
  28   LRESULT CALLBACK WndProc(HWND hwnd, UINT message,
  29                            WPARAM wparam, LPARAM lparam);
  30
  31   static LRESULT CALLBACK WndProcThunk(HWND hwnd,
  32                                        UINT message,
  33                                        WPARAM wparam,
  34                                        LPARAM lparam) {
  35     // TODO(vadimt): Remove ScopedTracker below once crbug.com/440919 is fixed.
  36     tracked_objects::ScopedTracker tracking_profile(
  37         FROM_HERE_WITH_EXPLICIT_FUNCTION(
  38             "440919 SystemMessageWindowWin::WndProcThunk"));
  39
  40     SystemMessageWindowWin* msg_wnd = reinterpret_cast<SystemMessageWindowWin*>(
  41         GetWindowLongPtr(hwnd, GWLP_USERDATA));
  42     if (msg_wnd)
  43       return msg_wnd->WndProc(hwnd, message, wparam, lparam);
  44     return ::DefWindowProc(hwnd, message, wparam, lparam);
  45   }
  46
  47   HMODULE instance_;
  48   HWND window_;
  49   class DeviceNotifications;
  50   scoped_ptr<DeviceNotifications> device_notifications_;
  51
  52   DISALLOW_COPY_AND_ASSIGN(SystemMessageWindowWin);
  53 };
  54
  55 }  // namespace content
  56
  57 #endif  // CONTENT_BROWSER_SYSTEM_MESSAGE_WINDOW_WIN_H_