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      1 // Copyright (c) 2011 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 CHROME_COMMON_NATIVE_WINDOW_NOTIFICATION_SOURCE_H_
      6 #define CHROME_COMMON_NATIVE_WINDOW_NOTIFICATION_SOURCE_H_
      7 #pragma once
      8 
      9 #include "content/common/notification_source.h"
     10 #include "ui/gfx/native_widget_types.h"
     11 
     12 // Specialization of the Source class for native windows.  On Windows, these are
     13 // HWNDs rather than pointers, and since the Source class expects a pointer
     14 // type, this is necessary.  On Mac/Linux, these are pointers, so this is
     15 // unnecessary but harmless.
     16 template<>
     17 class Source<gfx::NativeWindow> : public NotificationSource {
     18  public:
     19   explicit Source(gfx::NativeWindow wnd) : NotificationSource(wnd) {}
     20 
     21   explicit Source(const NotificationSource& other)
     22       : NotificationSource(other) {}
     23 
     24   gfx::NativeWindow operator->() const { return ptr(); }
     25   gfx::NativeWindow ptr() const {
     26     return static_cast<gfx::NativeWindow>(const_cast<void*>(ptr_));
     27   }
     28 };
     29 
     30 #endif  // CHROME_COMMON_NATIVE_WINDOW_NOTIFICATION_SOURCE_H_
     31