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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef MediaQueryParser_h
#define MediaQueryParser_h
#include "core/css/MediaList.h"
#include "core/css/MediaQuery.h"
#include "core/css/MediaQueryExp.h"
#include "core/css/parser/CSSParserToken.h"
#include "core/css/parser/CSSParserTokenRange.h"
#include "core/css/parser/CSSParserValues.h"
#include "core/css/parser/MediaQueryBlockWatcher.h"
#include "wtf/text/WTFString.h"
namespace blink {
class MediaQuerySet;
class MediaQueryData {
STACK_ALLOCATED();
private:
MediaQuery::Restrictor m_restrictor;
String m_mediaType;
OwnPtrWillBeMember<ExpressionHeapVector> m_expressions;
String m_mediaFeature;
CSSParserValueList m_valueList;
bool m_mediaTypeSet;
public:
MediaQueryData();
void clear();
bool addExpression();
bool tryAddParserValue(CSSParserTokenType, const CSSParserToken&);
void setMediaType(const String&);
PassOwnPtrWillBeRawPtr<MediaQuery> takeMediaQuery();
inline bool currentMediaQueryChanged() const
{
return (m_restrictor != MediaQuery::None || m_mediaTypeSet || m_expressions->size() > 0);
}
inline void setRestrictor(MediaQuery::Restrictor restrictor) { m_restrictor = restrictor; }
inline void setMediaFeature(const String& str) { m_mediaFeature = str; }
};
class MediaQueryParser {
STACK_ALLOCATED();
public:
static PassRefPtrWillBeRawPtr<MediaQuerySet> parseMediaQuerySet(const String&);
static PassRefPtrWillBeRawPtr<MediaQuerySet> parseMediaQuerySet(CSSParserTokenRange);
static PassRefPtrWillBeRawPtr<MediaQuerySet> parseMediaCondition(CSSParserTokenRange);
private:
enum ParserType {
MediaQuerySetParser,
MediaConditionParser,
};
MediaQueryParser(ParserType);
virtual ~MediaQueryParser();
PassRefPtrWillBeRawPtr<MediaQuerySet> parseImpl(CSSParserTokenRange);
void processToken(const CSSParserToken&);
void readRestrictor(CSSParserTokenType, const CSSParserToken&);
void readMediaNot(CSSParserTokenType, const CSSParserToken&);
void readMediaType(CSSParserTokenType, const CSSParserToken&);
void readAnd(CSSParserTokenType, const CSSParserToken&);
void readFeatureStart(CSSParserTokenType, const CSSParserToken&);
void readFeature(CSSParserTokenType, const CSSParserToken&);
void readFeatureColon(CSSParserTokenType, const CSSParserToken&);
void readFeatureValue(CSSParserTokenType, const CSSParserToken&);
void readFeatureEnd(CSSParserTokenType, const CSSParserToken&);
void skipUntilComma(CSSParserTokenType, const CSSParserToken&);
void skipUntilBlockEnd(CSSParserTokenType, const CSSParserToken&);
void done(CSSParserTokenType, const CSSParserToken&);
typedef void (MediaQueryParser::*State)(CSSParserTokenType, const CSSParserToken&);
void setStateAndRestrict(State, MediaQuery::Restrictor);
void handleBlocks(const CSSParserToken&);
State m_state;
ParserType m_parserType;
MediaQueryData m_mediaQueryData;
RefPtrWillBeMember<MediaQuerySet> m_querySet;
MediaQueryBlockWatcher m_blockWatcher;
const static State ReadRestrictor;
const static State ReadMediaNot;
const static State ReadMediaType;
const static State ReadAnd;
const static State ReadFeatureStart;
const static State ReadFeature;
const static State ReadFeatureColon;
const static State ReadFeatureValue;
const static State ReadFeatureEnd;
const static State SkipUntilComma;
const static State SkipUntilBlockEnd;
const static State Done;
};
} // namespace blink
#endif // MediaQueryParser_h
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