Source/WebCore/platform/PrerenderHandle.h

/*
 * Copyright (C) 2012 Google Inc. All rights reserved.
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#ifndef PrerenderHandle_h
#define PrerenderHandle_h

#if ENABLE(LINK_PRERENDER)

#include "ReferrerPolicy.h"
#include <wtf/PassRefPtr.h>
#include <wtf/RefCounted.h>
#include <wtf/RefPtr.h>
#include <wtf/text/WTFString.h>

namespace WebCore {

class KURL;
class Prerender;

class PrerenderHandle : public RefCounted<PrerenderHandle> {
    WTF_MAKE_NONCOPYABLE(PrerenderHandle);
public:
    static PassRefPtr<PrerenderHandle> create(const KURL&, const String& referrer, ReferrerPolicy);
    ~PrerenderHandle();

    Prerender* prerender();

    // FIXME: one day there will be events here, and we will be a PrerenderClient.

    // A prerender link element is added when it is inserted into a document.
    void add();

    // A prerender is abandoned when it's navigated away from. This is is a weaker signal
    // than cancel(), since the launcher hasn't indicated that the prerender isn't wanted,
    // and we may end up using it after, for instance, a short redirect chain.
    void abandon();

    // A prerender is canceled when it is removed from a document.
    void cancel();

    // A prerender is suspended along with the DOM containing its linkloader & prerenderer.
    void suspend();
    void resume();

    const KURL& url() const;
    const String& referrer() const;
    ReferrerPolicy referrerPolicy() const;

private:
    PrerenderHandle(const KURL&, const String& referrer, ReferrerPolicy);
    RefPtr<Prerender> m_prerender;
};

} // namespace WebCore

#endif // ENABLE(LINK_PRERENDER)

#endif // PrerenderHandle_h