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1 /*
2  * CSS Media Query
3  *
4  * Copyright (C) 2006 Kimmo Kinnunen <kimmo.t.kinnunen@nokia.com>.
5  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 APPLE COMPUTER, INC. OR
20  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
21  * EXEMPLARY, 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 THEORY
24  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27  */
28 
29 #ifndef MediaQueryExp_h
30 #define MediaQueryExp_h
31 
32 #include "CSSValue.h"
33 #include "MediaFeatureNames.h"
34 #include <wtf/PassOwnPtr.h>
35 #include <wtf/RefPtr.h>
36 #include <wtf/text/AtomicString.h>
37 
38 namespace WebCore {
39 class CSSParserValueList;
40 
41 class MediaQueryExp {
42     WTF_MAKE_FAST_ALLOCATED;
43 public:
44     static PassOwnPtr<MediaQueryExp> create(const AtomicString& mediaFeature, CSSParserValueList* values);
45     ~MediaQueryExp();
46 
mediaFeature()47     AtomicString mediaFeature() const { return m_mediaFeature; }
48 
value()49     CSSValue* value() const { return m_value.get(); }
50 
51     bool operator==(const MediaQueryExp& other) const
52     {
53         return (other.m_mediaFeature == m_mediaFeature)
54             && ((!other.m_value && !m_value)
55                 || (other.m_value && m_value && other.m_value->cssText() == m_value->cssText()));
56     }
57 
isValid()58     bool isValid() const { return m_isValid; }
59 
isViewportDependent()60     bool isViewportDependent() const { return m_mediaFeature == MediaFeatureNames::widthMediaFeature ||
61                                               m_mediaFeature == MediaFeatureNames::heightMediaFeature ||
62                                               m_mediaFeature == MediaFeatureNames::min_widthMediaFeature ||
63                                               m_mediaFeature == MediaFeatureNames::min_heightMediaFeature ||
64                                               m_mediaFeature == MediaFeatureNames::max_widthMediaFeature ||
65                                               m_mediaFeature == MediaFeatureNames::max_heightMediaFeature ||
66                                               m_mediaFeature == MediaFeatureNames::orientationMediaFeature ||
67                                               m_mediaFeature == MediaFeatureNames::aspect_ratioMediaFeature ||
68                                               m_mediaFeature == MediaFeatureNames::min_aspect_ratioMediaFeature ||
69                                               m_mediaFeature == MediaFeatureNames::max_aspect_ratioMediaFeature;  }
70 
71     String serialize() const;
72 
73 private:
74     MediaQueryExp(const AtomicString& mediaFeature, CSSParserValueList* values);
75 
76     AtomicString m_mediaFeature;
77     RefPtr<CSSValue> m_value;
78     bool m_isValid;
79     String m_serializationCache;
80 };
81 
82 } // namespace
83 
84 #endif
85