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 "core/fetch/ResourceClient.h"
36#include "core/fetch/ResourceOwner.h"
37#include "core/loader/LinkLoaderClient.h"
38#include "platform/PrerenderClient.h"
39#include "platform/Timer.h"
40#include "wtf/OwnPtr.h"
41
42namespace blink {
43
44class Document;
45class LinkRelAttribute;
46class PrerenderHandle;
47
48// The LinkLoader can load link rel types icon, dns-prefetch, subresource, prefetch and prerender.
49class LinkLoader FINAL : public ResourceOwner<Resource, ResourceClient>, public PrerenderClient {
50
51public:
52    explicit LinkLoader(LinkLoaderClient*);
53    virtual ~LinkLoader();
54
55    // from ResourceClient
56    virtual void notifyFinished(Resource*) OVERRIDE;
57
58    // from PrerenderClient
59    virtual void didStartPrerender() OVERRIDE;
60    virtual void didStopPrerender() OVERRIDE;
61    virtual void didSendLoadForPrerender() OVERRIDE;
62    virtual void didSendDOMContentLoadedForPrerender() OVERRIDE;
63
64    void released();
65    bool loadLink(const LinkRelAttribute&, const AtomicString& crossOriginMode, const String& type, const KURL&, Document&);
66
67private:
68    void linkLoadTimerFired(Timer<LinkLoader>*);
69    void linkLoadingErrorTimerFired(Timer<LinkLoader>*);
70
71    LinkLoaderClient* m_client;
72
73    Timer<LinkLoader> m_linkLoadTimer;
74    Timer<LinkLoader> m_linkLoadingErrorTimer;
75
76    OwnPtr<PrerenderHandle> m_prerender;
77};
78
79}
80
81#endif
82