Source/core/platform/FileIconLoader.h

/*
 * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
 * Copyright (C) 2011 Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1.  Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer. 
 * 2.  Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution. 
 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
 *     its contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission. 
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */

#ifndef FileIconLoader_h
#define FileIconLoader_h

#include <wtf/RefPtr.h>
#include <wtf/RefCounted.h>

namespace WebCore {

class FileIconLoader;
class Icon;

class FileIconLoaderClient {
public:
    virtual void updateRendering(PassRefPtr<Icon>) = 0;
    virtual ~FileIconLoaderClient();

protected:
    FileIconLoader* newFileIconLoader();

private:
    void discardLoader();

    RefPtr<FileIconLoader> m_loader;
};

class FileIconLoader : public RefCounted<FileIconLoader> {
public:
    static PassRefPtr<FileIconLoader> create(FileIconLoaderClient*);

    void disconnectClient();
    void notifyFinished(PassRefPtr<Icon>);

private:
    explicit FileIconLoader(FileIconLoaderClient*);

    FileIconLoaderClient* m_client;
};

} // namespace WebCore

#endif