Index: Source/core/css/parser/MediaQueryParser.cpp |
diff --git a/Source/core/css/parser/MediaQueryParser.cpp b/Source/core/css/parser/MediaQueryParser.cpp |
new file mode 100644 |
index 0000000000000000000000000000000000000000..c0c6c140c776a4c14378390edba1cfda1e3657f2 |
--- /dev/null |
+++ b/Source/core/css/parser/MediaQueryParser.cpp |
@@ -0,0 +1,243 @@ |
+// 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. |
+ |
+#include "config.h" |
+#include "core/css/parser/MediaQueryParser.h" |
+ |
+#include "MediaTypeNames.h" |
+#include "core/css/parser/CSSPropertyParser.h" |
+#include "core/css/parser/MediaQueryTokenizer.h" |
+ |
+namespace WebCore { |
+ |
+PassRefPtrWillBeRawPtr<MediaQuerySet> MediaQueryParser::parse(const String& queryString) |
+{ |
+ return MediaQueryParser(queryString).parseImpl(); |
+} |
+ |
+const MediaQueryParser::State MediaQueryParser::ReadRestrictor = &MediaQueryParser::readRestrictor; |
+const MediaQueryParser::State MediaQueryParser::ReadMediaType = &MediaQueryParser::readMediaType; |
+const MediaQueryParser::State MediaQueryParser::ReadAnd = &MediaQueryParser::readAnd; |
+const MediaQueryParser::State MediaQueryParser::ReadFeatureStart = &MediaQueryParser::readFeatureStart; |
+const MediaQueryParser::State MediaQueryParser::ReadFeature = &MediaQueryParser::readFeature; |
+const MediaQueryParser::State MediaQueryParser::ReadFeatureColon = &MediaQueryParser::readFeatureColon; |
+const MediaQueryParser::State MediaQueryParser::ReadFeatureValue = &MediaQueryParser::readFeatureValue; |
+const MediaQueryParser::State MediaQueryParser::ReadFeatureEnd = &MediaQueryParser::readFeatureEnd; |
+const MediaQueryParser::State MediaQueryParser::SkipUntilComma = &MediaQueryParser::skipUntilComma; |
+const MediaQueryParser::State MediaQueryParser::SkipUntilParenthesis = &MediaQueryParser::skipUntilParenthesis; |
+const MediaQueryParser::State MediaQueryParser::Done = &MediaQueryParser::done; |
+ |
+// FIXME: Replace the MediaQueryTokenizer with a generic CSSTokenizer, once there is one, |
+// or better yet, replace the MediaQueryParser with a generic thread-safe CSS parser. |
+MediaQueryParser::MediaQueryParser(const String& queryString) |
+ : m_state(&MediaQueryParser::readRestrictor) |
+ , m_querySet(MediaQuerySet::create()) |
+{ |
+ MediaQueryTokenizer::tokenize(queryString, m_tokens); |
+} |
+ |
+void MediaQueryParser::setStateAndRestrict(State state, MediaQuery::Restrictor restrictor) |
+{ |
+ m_mediaQueryData.setRestrictor(restrictor); |
+ m_state = state; |
+} |
+ |
+// State machine member functions start here |
+void MediaQueryParser::readRestrictor(MediaQueryTokenType type, TokenIterator& token) |
+{ |
+ readMediaType(type, token); |
+} |
+ |
+void MediaQueryParser::readMediaType(MediaQueryTokenType type, TokenIterator& token) |
+{ |
+ if (type == LeftParenthesisToken) { |
+ m_state = ReadFeature; |
+ } else if (type == IdentToken) { |
+ if (m_state == ReadRestrictor && equalIgnoringCase(token->value(), "not")) { |
+ setStateAndRestrict(ReadMediaType, MediaQuery::Not); |
+ } else if (m_state == ReadRestrictor && equalIgnoringCase(token->value(), "only")) { |
+ setStateAndRestrict(ReadMediaType, MediaQuery::Only); |
+ } else { |
+ m_mediaQueryData.setMediaType(token->value()); |
+ m_state = ReadAnd; |
+ } |
+ } else if (type == EOFToken && (!m_querySet->queryVector().size() || m_state != ReadRestrictor)) { |
+ m_state = Done; |
+ } else { |
+ if (type == CommaToken) |
+ --token; |
+ m_state = SkipUntilComma; |
+ } |
+} |
+ |
+void MediaQueryParser::readAnd(MediaQueryTokenType type, TokenIterator& token) |
+{ |
+ if (type == IdentToken && equalIgnoringCase(token->value(), "and")) { |
+ m_state = ReadFeatureStart; |
+ } else if (type == CommaToken) { |
+ m_querySet->addMediaQuery(m_mediaQueryData.takeMediaQuery()); |
+ m_state = ReadRestrictor; |
+ } else if (type == EOFToken) { |
+ m_state = Done; |
+ } else { |
+ m_state = SkipUntilComma; |
+ } |
+} |
+ |
+void MediaQueryParser::readFeatureStart(MediaQueryTokenType type, TokenIterator& token) |
+{ |
+ if (type == LeftParenthesisToken) |
+ m_state = ReadFeature; |
+ else |
+ m_state = SkipUntilComma; |
+} |
+ |
+void MediaQueryParser::readFeature(MediaQueryTokenType type, TokenIterator& token) |
+{ |
+ if (type == IdentToken) { |
+ m_mediaQueryData.setMediaFeature(token->value()); |
+ m_state = ReadFeatureColon; |
+ } else { |
+ m_state = SkipUntilComma; |
+ } |
+} |
+ |
+void MediaQueryParser::readFeatureColon(MediaQueryTokenType type, TokenIterator& token) |
+{ |
+ if (type == ColonToken) { |
+ m_state = ReadFeatureValue; |
+ } else if (type == RightParenthesisToken || type == EOFToken) { |
+ --token; |
+ m_state = ReadFeatureEnd; |
+ } else { |
+ m_state = SkipUntilParenthesis; |
+ } |
+} |
+ |
+void MediaQueryParser::readFeatureValue(MediaQueryTokenType type, TokenIterator& token) |
+{ |
+ if (type == DimensionToken && token->unitType() == CSSPrimitiveValue::CSS_UNKNOWN) { |
+ m_state = SkipUntilComma; |
+ } else { |
+ m_mediaQueryData.addParserValue(type, *token); |
+ m_state = ReadFeatureEnd; |
+ } |
+} |
+ |
+void MediaQueryParser::readFeatureEnd(MediaQueryTokenType type, TokenIterator& token) |
+{ |
+ if (type == RightParenthesisToken || type == EOFToken) { |
+ if (m_mediaQueryData.addExpression()) |
+ m_state = ReadAnd; |
+ else |
+ m_state = SkipUntilComma; |
+ } else if (type == DelimiterToken && token->delimiter() == '/') { |
+ m_mediaQueryData.addParserValue(type, *token); |
+ m_state = ReadFeatureValue; |
+ } else { |
+ m_state = SkipUntilParenthesis; |
+ } |
+} |
+ |
+void MediaQueryParser::skipUntilComma(MediaQueryTokenType type, TokenIterator& token) |
+{ |
+ if (type == CommaToken || type == EOFToken) { |
+ m_state = ReadRestrictor; |
+ m_mediaQueryData.clear(); |
+ m_querySet->addMediaQuery(MediaQuery::createNotAll()); |
+ } |
+} |
+ |
+void MediaQueryParser::skipUntilParenthesis(MediaQueryTokenType type, TokenIterator& token) |
+{ |
+ if (type == RightParenthesisToken) |
+ m_state = SkipUntilComma; |
+} |
+ |
+void MediaQueryParser::done(MediaQueryTokenType type, TokenIterator& token) { } |
+ |
+void MediaQueryParser::processToken(TokenIterator& token) |
+{ |
+ MediaQueryTokenType type = token->type(); |
+ |
+ // Call the function that handles current state |
+ if (type != WhitespaceToken) |
+ ((this)->*(m_state))(type, token); |
+} |
+ |
+// The state machine loop |
+PassRefPtrWillBeRawPtr<MediaQuerySet> MediaQueryParser::parseImpl() |
+{ |
+ for (Vector<MediaQueryToken>::iterator token = m_tokens.begin(); token != m_tokens.end(); ++token) |
+ processToken(token); |
+ |
+ if (m_state != ReadAnd && m_state != ReadRestrictor && m_state != Done) |
+ m_querySet->addMediaQuery(MediaQuery::createNotAll()); |
+ else if (m_mediaQueryData.currentMediaQueryChanged()) |
+ m_querySet->addMediaQuery(m_mediaQueryData.takeMediaQuery()); |
+ |
+ return m_querySet; |
+} |
+ |
+MediaQueryData::MediaQueryData() |
+ : m_restrictor(MediaQuery::None) |
+ , m_mediaType(MediaTypeNames::all) |
+ , m_expressions(adoptPtr(new ExpressionHeapVector)) |
+ , m_mediaTypeSet(false) |
+{ |
+} |
+ |
+void MediaQueryData::clear() |
+{ |
+ m_restrictor = MediaQuery::None; |
+ m_mediaType = MediaTypeNames::all; |
+ m_mediaTypeSet = false; |
+ m_mediaFeature = String(); |
+ m_valueList.clear(); |
+ m_expressions = adoptPtr(new ExpressionHeapVector); |
+} |
+ |
+PassOwnPtr<MediaQuery> MediaQueryData::takeMediaQuery() |
+{ |
+ OwnPtr<MediaQuery> mediaQuery = adoptPtr(new MediaQuery(m_restrictor, m_mediaType, m_expressions.release())); |
+ clear(); |
+ return mediaQuery.release(); |
+} |
+ |
+bool MediaQueryData::addExpression() |
+{ |
+ OwnPtr<MediaQueryExp> expression = MediaQueryExp::create(m_mediaFeature, &m_valueList); |
+ bool isValid = !!expression; |
+ m_expressions->append(expression.release()); |
+ m_valueList.clear(); |
+ return isValid; |
+} |
+ |
+void MediaQueryData::addParserValue(MediaQueryTokenType type, MediaQueryToken& token) |
+{ |
+ CSSParserValue value; |
+ if (type == NumberToken || type == PercentageToken || type == DimensionToken) { |
+ value.setFromNumber(token.numericValue(), token.unitType()); |
+ value.isInt = (token.numericValueType() == IntegerValueType); |
+ } else if (type == DelimiterToken) { |
+ value.unit = CSSParserValue::Operator; |
+ value.iValue = token.delimiter(); |
+ } else { |
+ CSSParserFunction* function = new CSSParserFunction; |
+ function->name.init(token.value()); |
+ value.setFromFunction(function); |
+ CSSParserString tokenValue; |
+ tokenValue.init(token.value()); |
+ value.id = cssValueKeywordID(tokenValue); |
+ } |
+ m_valueList.addValue(value); |
+} |
+ |
+void MediaQueryData::setMediaType(const String& mediaType) |
+{ |
+ m_mediaType = mediaType; |
+ m_mediaTypeSet = true; |
+} |
+ |
+} // namespace WebCore |