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 "core/CSSValueKeywords.h" 33 #include "core/MediaFeatureNames.h" 34 #include "core/css/CSSPrimitiveValue.h" 35 #include "core/css/CSSValue.h" 36 #include "wtf/PassOwnPtr.h" 37 #include "wtf/RefPtr.h" 38 39 namespace blink { 40 class CSSParserValueList; 41 42 struct MediaQueryExpValue { 43 CSSValueID id; 44 double value; 45 CSSPrimitiveValue::UnitType unit; 46 unsigned numerator; 47 unsigned denominator; 48 49 bool isID; 50 bool isValue; 51 bool isRatio; 52 MediaQueryExpValueMediaQueryExpValue53 MediaQueryExpValue() 54 : id(CSSValueInvalid) 55 , value(0) 56 , unit(CSSPrimitiveValue::CSS_UNKNOWN) 57 , numerator(0) 58 , denominator(1) 59 , isID(false) 60 , isValue(false) 61 , isRatio(false) 62 { 63 } 64 isValidMediaQueryExpValue65 bool isValid() const { return (isID || isValue || isRatio); } 66 String cssText() const; equalsMediaQueryExpValue67 bool equals(const MediaQueryExpValue& expValue) const 68 { 69 if (isID) 70 return (id == expValue.id); 71 if (isValue) 72 return (value == expValue.value); 73 if (isRatio) 74 return (numerator == expValue.numerator && denominator == expValue.denominator); 75 return !expValue.isValid(); 76 } 77 }; 78 79 class MediaQueryExp : public NoBaseWillBeGarbageCollectedFinalized<MediaQueryExp> { 80 WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED; 81 public: 82 static PassOwnPtrWillBeRawPtr<MediaQueryExp> createIfValid(const String& mediaFeature, CSSParserValueList*); 83 ~MediaQueryExp(); 84 mediaFeature()85 const String& mediaFeature() const { return m_mediaFeature; } 86 expValue()87 MediaQueryExpValue expValue() const { return m_expValue; } 88 89 bool operator==(const MediaQueryExp& other) const; 90 91 bool isViewportDependent() const; 92 93 String serialize() const; 94 copy()95 PassOwnPtrWillBeRawPtr<MediaQueryExp> copy() const { return adoptPtrWillBeNoop(new MediaQueryExp(*this)); } 96 97 MediaQueryExp(const MediaQueryExp& other); 98 trace(Visitor * visitor)99 void trace(Visitor* visitor) { } 100 101 private: 102 MediaQueryExp(const String&, const MediaQueryExpValue&); 103 104 String m_mediaFeature; 105 MediaQueryExpValue m_expValue; 106 }; 107 108 } // namespace 109 110 #endif 111