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/*
* CSS Media Query
*
* Copyright (C) 2006 Kimmo Kinnunen <kimmo.t.kinnunen@nokia.com>.
* Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef MediaQueryExp_h
#define MediaQueryExp_h
#include "core/CSSValueKeywords.h"
#include "core/CoreExport.h"
#include "core/MediaFeatureNames.h"
#include "core/css/CSSPrimitiveValue.h"
#include "core/css/CSSValue.h"
#include "wtf/Allocator.h"
#include "wtf/RefPtr.h"
namespace blink {
class CSSParserToken;
struct MediaQueryExpValue {
DISALLOW_NEW();
CSSValueID id;
double value;
CSSPrimitiveValue::UnitType unit;
unsigned numerator;
unsigned denominator;
bool isID;
bool isValue;
bool isRatio;
MediaQueryExpValue()
: id(CSSValueInvalid),
value(0),
unit(CSSPrimitiveValue::UnitType::Unknown),
numerator(0),
denominator(1),
isID(false),
isValue(false),
isRatio(false) {}
bool isValid() const { return (isID || isValue || isRatio); }
String cssText() const;
bool equals(const MediaQueryExpValue& expValue) const {
if (isID)
return (id == expValue.id);
if (isValue)
return (value == expValue.value);
if (isRatio)
return (numerator == expValue.numerator &&
denominator == expValue.denominator);
return !expValue.isValid();
}
};
class CORE_EXPORT MediaQueryExp
: public GarbageCollectedFinalized<MediaQueryExp> {
public:
static MediaQueryExp* createIfValid(const String& mediaFeature,
const Vector<CSSParserToken, 4>&);
~MediaQueryExp();
const String& mediaFeature() const { return m_mediaFeature; }
MediaQueryExpValue expValue() const { return m_expValue; }
bool operator==(const MediaQueryExp& other) const;
bool isViewportDependent() const;
bool isDeviceDependent() const;
String serialize() const;
MediaQueryExp* copy() const { return new MediaQueryExp(*this); }
MediaQueryExp(const MediaQueryExp& other);
DEFINE_INLINE_TRACE() {}
private:
MediaQueryExp(const String&, const MediaQueryExpValue&);
String m_mediaFeature;
MediaQueryExpValue m_expValue;
};
} // namespace blink
#endif
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