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 WebCore { 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 bool isInteger; 53 MediaQueryExpValueMediaQueryExpValue54 MediaQueryExpValue() 55 : id(CSSValueInvalid) 56 , value(0) 57 , unit(CSSPrimitiveValue::CSS_UNKNOWN) 58 , numerator(0) 59 , denominator(1) 60 , isID(false) 61 , isValue(false) 62 , isRatio(false) 63 , isInteger(false) 64 { 65 } 66 isValidMediaQueryExpValue67 bool isValid() const { return (isID || isValue || isRatio); } 68 String cssText() const; equalsMediaQueryExpValue69 bool equals(const MediaQueryExpValue& expValue) const 70 { 71 if (isID) 72 return (id == expValue.id); 73 if (isValue) 74 return (value == expValue.value); 75 if (isRatio) 76 return (numerator == expValue.numerator && denominator == expValue.denominator); 77 return !expValue.isValid(); 78 } 79 }; 80 81 class MediaQueryExp : public NoBaseWillBeGarbageCollectedFinalized<MediaQueryExp> { 82 WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED; 83 public: 84 static PassOwnPtrWillBeRawPtr<MediaQueryExp> createIfValid(const String& mediaFeature, CSSParserValueList*); 85 ~MediaQueryExp(); 86 mediaFeature()87 const String& mediaFeature() const { return m_mediaFeature; } 88 expValue()89 MediaQueryExpValue expValue() const { return m_expValue; } 90 91 bool operator==(const MediaQueryExp& other) const; 92 93 bool isViewportDependent() const; 94 95 String serialize() const; 96 copy()97 PassOwnPtrWillBeRawPtr<MediaQueryExp> copy() const { return adoptPtrWillBeNoop(new MediaQueryExp(*this)); } 98 99 MediaQueryExp(const MediaQueryExp& other); 100 trace(Visitor * visitor)101 void trace(Visitor* visitor) { } 102 103 private: 104 MediaQueryExp(const String&, const MediaQueryExpValue&); 105 106 String m_mediaFeature; 107 MediaQueryExpValue m_expValue; 108 }; 109 110 } // namespace 111 112 #endif 113