/*
* Copyright (C) 2012 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 WebPrerenderingSupport_h
#define WebPrerenderingSupport_h
#include "WebCommon.h"
namespace blink {
class WebPrerender;
class WebPrerenderingSupport {
public:
BLINK_PLATFORM_EXPORT static void initialize(WebPrerenderingSupport*);
BLINK_PLATFORM_EXPORT static void shutdown();
BLINK_PLATFORM_EXPORT static WebPrerenderingSupport* current();
// A prerender link element is added when it is inserted into a document.
virtual void add(const WebPrerender&) = 0;
// A prerender is canceled when it is removed from a document.
virtual void cancel(const WebPrerender&) = 0;
// A prerender is abandoned when it's navigated away from or suspended in the page cache. This
// 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.
virtual void abandon(const WebPrerender&) = 0;
protected:
WebPrerenderingSupport() { }
virtual ~WebPrerenderingSupport() { }
private:
static WebPrerenderingSupport* s_platform;
};
} // namespace blink
#endif // WebPrerenderingSupport_h