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// Copyright 2014 The Chromium Authors. All rights reserved.
// Copyright (C) 2016 Apple Inc. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * 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.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "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 THE COPYRIGHT
// OWNER 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.
#pragma once
#include "CSSParserToken.h"
#include "CSSParserTokenRange.h"
#include "MediaQuery.h"
#include "MediaQueryBlockWatcher.h"
#include "MediaQueryExpression.h"
#include "MediaQueryParserContext.h"
#include <wtf/text/WTFString.h>
namespace WebCore {
class MediaQuerySet;
struct CSSParserContext;
class MediaQueryParser {
WTF_MAKE_NONCOPYABLE(MediaQueryParser);
public:
static RefPtr<MediaQuerySet> parseMediaQuerySet(const String&, MediaQueryParserContext);
static RefPtr<MediaQuerySet> parseMediaQuerySet(CSSParserTokenRange, MediaQueryParserContext);
static RefPtr<MediaQuerySet> parseMediaCondition(CSSParserTokenRange, MediaQueryParserContext);
private:
enum ParserType {
MediaQuerySetParser,
MediaConditionParser,
};
MediaQueryParser(ParserType, MediaQueryParserContext);
virtual ~MediaQueryParser();
RefPtr<MediaQuerySet> parseInternal(CSSParserTokenRange&);
void processToken(const CSSParserToken&, CSSParserTokenRange&);
void readRestrictor(CSSParserTokenType, const CSSParserToken&, CSSParserTokenRange&);
void readMediaNot(CSSParserTokenType, const CSSParserToken&, CSSParserTokenRange&);
void readMediaType(CSSParserTokenType, const CSSParserToken&, CSSParserTokenRange&);
void readAnd(CSSParserTokenType, const CSSParserToken&, CSSParserTokenRange&);
void readFeatureStart(CSSParserTokenType, const CSSParserToken&, CSSParserTokenRange&);
void readFeature(CSSParserTokenType, const CSSParserToken&, CSSParserTokenRange&);
void readFeatureColon(CSSParserTokenType, const CSSParserToken&, CSSParserTokenRange&);
void readFeatureValue(CSSParserTokenType, const CSSParserToken&, CSSParserTokenRange&);
void readFeatureEnd(CSSParserTokenType, const CSSParserToken&, CSSParserTokenRange&);
void skipUntilComma(CSSParserTokenType, const CSSParserToken&, CSSParserTokenRange&);
void skipUntilBlockEnd(CSSParserTokenType, const CSSParserToken&, CSSParserTokenRange&);
void done(CSSParserTokenType, const CSSParserToken&, CSSParserTokenRange&);
using State = void (MediaQueryParser::*)(CSSParserTokenType, const CSSParserToken&, CSSParserTokenRange&);
void setStateAndRestrict(State, MediaQuery::Restrictor);
void handleBlocks(const CSSParserToken&);
void commitMediaQuery();
class MediaQueryData {
WTF_MAKE_NONCOPYABLE(MediaQueryData);
public:
explicit MediaQueryData(MediaQueryParserContext);
void clear();
void addExpression(CSSParserTokenRange&);
bool lastExpressionValid();
void removeLastExpression();
void setMediaType(String&& mediaType) { m_mediaType = WTFMove(mediaType); }
MediaQuery::Restrictor restrictor() const { return m_restrictor; }
Vector<MediaQueryExpression>& expressions() { return m_expressions; }
const std::optional<String>& mediaType() const { return m_mediaType; }
bool currentMediaQueryChanged() const
{
return (m_restrictor != MediaQuery::None || m_mediaType || !m_expressions.isEmpty());
}
MediaQuery::Restrictor restrictor() { return m_restrictor; }
void setRestrictor(MediaQuery::Restrictor restrictor) { m_restrictor = restrictor; }
void setMediaFeature(const String& str) { m_mediaFeature = str; }
void setMediaQueryParserContext(MediaQueryParserContext context) { m_context = context; }
private:
MediaQuery::Restrictor m_restrictor { MediaQuery::None };
std::optional<String> m_mediaType;
Vector<MediaQueryExpression> m_expressions;
String m_mediaFeature;
MediaQueryParserContext m_context;
};
State m_state;
ParserType m_parserType;
MediaQueryData m_mediaQueryData;
RefPtr<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 WebCore
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