140 lines
5.8 KiB
C++
140 lines
5.8 KiB
C++
// Copyright 2014 The Chromium Authors. All rights reserved.
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// Copyright (C) 2016 Apple Inc. All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#pragma once
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#include "CSSParserToken.h"
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#include "CSSParserTokenRange.h"
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#include "MediaQuery.h"
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#include "MediaQueryBlockWatcher.h"
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#include "MediaQueryExpression.h"
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#include "MediaQueryParserContext.h"
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#include <wtf/text/WTFString.h>
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namespace WebCore {
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class MediaQuerySet;
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struct CSSParserContext;
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class MediaQueryParser {
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WTF_MAKE_NONCOPYABLE(MediaQueryParser);
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public:
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static RefPtr<MediaQuerySet> parseMediaQuerySet(const String&, MediaQueryParserContext);
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static RefPtr<MediaQuerySet> parseMediaQuerySet(CSSParserTokenRange, MediaQueryParserContext);
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static RefPtr<MediaQuerySet> parseMediaCondition(CSSParserTokenRange, MediaQueryParserContext);
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private:
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enum ParserType {
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MediaQuerySetParser,
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MediaConditionParser,
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};
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MediaQueryParser(ParserType, MediaQueryParserContext);
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virtual ~MediaQueryParser();
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RefPtr<MediaQuerySet> parseInternal(CSSParserTokenRange);
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void processToken(const CSSParserToken&, CSSParserTokenRange&);
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void readRestrictor(CSSParserTokenType, const CSSParserToken&, CSSParserTokenRange&);
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void readMediaNot(CSSParserTokenType, const CSSParserToken&, CSSParserTokenRange&);
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void readMediaType(CSSParserTokenType, const CSSParserToken&, CSSParserTokenRange&);
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void readAnd(CSSParserTokenType, const CSSParserToken&, CSSParserTokenRange&);
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void readFeatureStart(CSSParserTokenType, const CSSParserToken&, CSSParserTokenRange&);
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void readFeature(CSSParserTokenType, const CSSParserToken&, CSSParserTokenRange&);
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void readFeatureColon(CSSParserTokenType, const CSSParserToken&, CSSParserTokenRange&);
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void readFeatureValue(CSSParserTokenType, const CSSParserToken&, CSSParserTokenRange&);
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void readFeatureEnd(CSSParserTokenType, const CSSParserToken&, CSSParserTokenRange&);
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void skipUntilComma(CSSParserTokenType, const CSSParserToken&, CSSParserTokenRange&);
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void skipUntilBlockEnd(CSSParserTokenType, const CSSParserToken&, CSSParserTokenRange&);
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void done(CSSParserTokenType, const CSSParserToken&, CSSParserTokenRange&);
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using State = void (MediaQueryParser::*)(CSSParserTokenType, const CSSParserToken&, CSSParserTokenRange&);
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void setStateAndRestrict(State, MediaQuery::Restrictor);
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void handleBlocks(const CSSParserToken&);
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void commitMediaQuery();
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class MediaQueryData {
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WTF_MAKE_NONCOPYABLE(MediaQueryData);
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public:
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explicit MediaQueryData(MediaQueryParserContext);
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void clear();
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void addExpression(CSSParserTokenRange&);
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bool lastExpressionValid();
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void removeLastExpression();
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void setMediaType(const String& mediaType) { m_mediaType = mediaType; }
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MediaQuery::Restrictor restrictor() const { return m_restrictor; }
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Vector<MediaQueryExpression>& expressions() { return m_expressions; }
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const std::optional<String>& mediaType() const { return m_mediaType; }
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bool currentMediaQueryChanged() const
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{
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return (m_restrictor != MediaQuery::None || m_mediaType || !m_expressions.isEmpty());
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}
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MediaQuery::Restrictor restrictor() { return m_restrictor; }
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void setRestrictor(MediaQuery::Restrictor restrictor) { m_restrictor = restrictor; }
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void setMediaFeature(const String& str) { m_mediaFeature = str; }
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void setMediaQueryParserContext(MediaQueryParserContext context) { m_context = context; }
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private:
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MediaQuery::Restrictor m_restrictor { MediaQuery::None };
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std::optional<String> m_mediaType;
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Vector<MediaQueryExpression> m_expressions;
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String m_mediaFeature;
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MediaQueryParserContext m_context;
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};
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State m_state;
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ParserType m_parserType;
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MediaQueryData m_mediaQueryData;
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RefPtr<MediaQuerySet> m_querySet;
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MediaQueryBlockWatcher m_blockWatcher;
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const static State ReadRestrictor;
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const static State ReadMediaNot;
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const static State ReadMediaType;
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const static State ReadAnd;
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const static State ReadFeatureStart;
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const static State ReadFeature;
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const static State ReadFeatureColon;
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const static State ReadFeatureValue;
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const static State ReadFeatureEnd;
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const static State SkipUntilComma;
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const static State SkipUntilBlockEnd;
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const static State Done;
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};
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} // namespace WebCore
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