1/*
2 * Copyright (C) 2013 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#ifndef LinkResource_h
32#define LinkResource_h
33
34#include "core/fetch/FetchRequest.h"
35#include "platform/heap/Handle.h"
36#include "platform/weborigin/KURL.h"
37#include "wtf/text/WTFString.h"
38
39namespace blink {
40
41class HTMLLinkElement;
42
43class LinkResource : public NoBaseWillBeGarbageCollectedFinalized<LinkResource>  {
44    WTF_MAKE_NONCOPYABLE(LinkResource); WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED;
45public:
46    enum Type {
47        Style,
48        Import,
49        Manifest
50    };
51
52    explicit LinkResource(HTMLLinkElement*);
53    virtual ~LinkResource();
54
55    bool shouldLoadResource() const;
56    LocalFrame* loadingFrame() const;
57
58    virtual Type type() const = 0;
59    virtual void process() = 0;
60    virtual void ownerRemoved() { }
61    virtual void ownerInserted() { }
62    virtual bool hasLoaded() const = 0;
63
64    virtual void trace(Visitor*);
65
66protected:
67    RawPtrWillBeMember<HTMLLinkElement> m_owner;
68};
69
70class LinkRequestBuilder {
71    STACK_ALLOCATED();
72public:
73    explicit LinkRequestBuilder(HTMLLinkElement* owner);
74
75    bool isValid() const { return !m_url.isEmpty() && m_url.isValid(); }
76    const KURL& url() const { return m_url; }
77    const AtomicString& charset() const { return m_charset; }
78    FetchRequest build(bool blocking) const;
79
80private:
81    RawPtrWillBeMember<HTMLLinkElement> m_owner;
82    KURL m_url;
83    AtomicString m_charset;
84};
85
86} // namespace blink
87
88#endif // LinkResource_h
89