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// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef APP_WIN_SCOPED_PROP_H_
#define APP_WIN_SCOPED_PROP_H_
#pragma once
#include <windows.h>
#include "base/logging.h"
namespace app {
namespace win {
// ScopedProp is a wrapper around SetProp. Use ScopedProp rather than SetProp as
// it handles errors conditions for you and forces you to think about
// cleanup. ScopedProp must be destroyed before the window is destroyed, else
// you're going to leak a property, which could lead to failure to set a
// property later on.
//
// *WARNING*
// SetProp is very fragile. SetProp makes use of a finite chunk of memory that
// is very easy to exhaust. Unless you need to share a property across process
// boundaries you should instead use ViewProp, which does not cause leaks at the
// window manager.
class ScopedProp {
public:
// Registers the key value pair for the specified window. ScopedProp does not
// maintain the value, just the key/value pair.
ScopedProp(HWND hwnd, const std::wstring& key, HANDLE data);
~ScopedProp();
const std::wstring& key() const { return key_; }
private:
HWND hwnd_;
const std::wstring key_;
DISALLOW_COPY_AND_ASSIGN(ScopedProp);
};
} // namespace win
} // namespace app
#endif // APP_WIN_SCOPED_PROP_H_
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