1/*
2 * Copyright (C) 2012 Intel Corporation. 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
6 * are met:
7 *
8 * 1. Redistributions of source code must retain the above
9 *    copyright notice, this list of conditions and the following
10 *    disclaimer.
11 * 2. Redistributions in binary form must reproduce the above
12 *    copyright notice, this list of conditions and the following
13 *    disclaimer in the documentation and/or other materials
14 *    provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
17 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
21 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
23 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
25 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
26 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#ifndef ViewportStyleResolver_h
31#define ViewportStyleResolver_h
32
33#include "core/CSSPropertyNames.h"
34#include "core/css/RuleSet.h"
35#include "platform/Length.h"
36#include "wtf/RefCounted.h"
37#include "wtf/RefPtr.h"
38
39namespace blink {
40
41class Document;
42class MutableStylePropertySet;
43class StyleRuleViewport;
44
45class ViewportStyleResolver : public NoBaseWillBeGarbageCollected<ViewportStyleResolver> {
46    DECLARE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(ViewportStyleResolver);
47public:
48    static PassOwnPtrWillBeRawPtr<ViewportStyleResolver> create(Document* document)
49    {
50        return adoptPtrWillBeNoop(new ViewportStyleResolver(document));
51    }
52
53    enum Origin { UserAgentOrigin, AuthorOrigin };
54
55    void collectViewportRules(RuleSet*, Origin);
56
57    void resolve();
58
59    void trace(Visitor*);
60
61private:
62    explicit ViewportStyleResolver(Document*);
63
64    void addViewportRule(StyleRuleViewport*, Origin);
65
66    float viewportArgumentValue(CSSPropertyID) const;
67    Length viewportLengthValue(CSSPropertyID) const;
68
69    RawPtrWillBeMember<Document> m_document;
70    RefPtrWillBeMember<MutableStylePropertySet> m_propertySet;
71    bool m_hasAuthorStyle;
72};
73
74} // namespace blink
75
76#endif // ViewportStyleResolver_h
77