1/* 2 * Copyright (C) 2011 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 * 30 */ 31 32#ifndef LinkLoader_h 33#define LinkLoader_h 34 35#include "CachedResourceClient.h" 36#include "CachedResourceHandle.h" 37#include "LinkLoaderClient.h" 38#include "Timer.h" 39 40#include <wtf/RefPtr.h> 41 42namespace WebCore { 43 44class Document; 45class URL; 46struct LinkRelAttribute; 47 48// The LinkLoader can load link rel types icon, dns-prefetch, subresource and prefetch. 49class LinkLoader : public CachedResourceClient { 50 51public: 52 explicit LinkLoader(LinkLoaderClient*); 53 virtual ~LinkLoader(); 54 55 // from CachedResourceClient 56 virtual void notifyFinished(CachedResource*) override; 57 58 void released(); 59 bool loadLink(const LinkRelAttribute&, const String& type, const String& sizes, const URL&, Document*); 60 61private: 62 void linkLoadTimerFired(Timer<LinkLoader>&); 63 void linkLoadingErrorTimerFired(Timer<LinkLoader>&); 64 65 LinkLoaderClient* m_client; 66 67 CachedResourceHandle<CachedResource> m_cachedLinkResource; 68 Timer<LinkLoader> m_linkLoadTimer; 69 Timer<LinkLoader> m_linkLoadingErrorTimer; 70}; 71 72} 73 74#endif 75