Source/WebCore/loader/LinkLoader.h

/*
 * 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:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * 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.
 *     * Neither the name of Google Inc. 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 THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
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 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 */

#ifndef LinkLoader_h
#define LinkLoader_h

#include "CachedResourceClient.h"
#include "CachedResourceHandle.h"
#include "LinkLoaderClient.h"
#include "Timer.h"

#include <wtf/RefPtr.h>

namespace WebCore {

class Document;
class URL;
struct LinkRelAttribute;

// The LinkLoader can load link rel types icon, dns-prefetch, subresource and prefetch.
class LinkLoader : public CachedResourceClient {

public:
    explicit LinkLoader(LinkLoaderClient*);
    virtual ~LinkLoader();

    // from CachedResourceClient
    virtual void notifyFinished(CachedResource*);

    void released();
    bool loadLink(const LinkRelAttribute&, const String& type, const String& sizes, const URL&, Document*);

private:
    void linkLoadTimerFired(Timer<LinkLoader>&);
    void linkLoadingErrorTimerFired(Timer<LinkLoader>&);

    LinkLoaderClient* m_client;

    CachedResourceHandle<CachedResource> m_cachedLinkResource;
    Timer<LinkLoader> m_linkLoadTimer;
    Timer<LinkLoader> m_linkLoadingErrorTimer;
};
    
}

#endif