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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #ifndef MediaQueryParser_h |
| 6 #define MediaQueryParser_h |
| 7 |
| 8 #include "core/css/CSSParserValues.h" |
| 9 #include "core/css/MediaList.h" |
| 10 #include "core/css/MediaQuery.h" |
| 11 #include "core/css/MediaQueryExp.h" |
| 12 #include "core/css/parser/MediaQueryToken.h" |
| 13 #include "wtf/Vector.h" |
| 14 #include "wtf/text/WTFString.h" |
| 15 |
| 16 namespace WebCore { |
| 17 |
| 18 class MediaQuerySet; |
| 19 |
| 20 class MediaQueryData { |
| 21 private: |
| 22 MediaQuery::Restrictor m_restrictor; |
| 23 String m_mediaType; |
| 24 OwnPtr<ExpressionHeapVector> m_expressions; |
| 25 String m_mediaFeature; |
| 26 CSSParserValueList m_valueList; |
| 27 bool m_mediaTypeSet; |
| 28 |
| 29 public: |
| 30 MediaQueryData(); |
| 31 void clear(); |
| 32 bool addExpression(); |
| 33 void addParserValue(MediaQueryTokenType, MediaQueryToken&); |
| 34 void setMediaType(const String&); |
| 35 PassOwnPtr<MediaQuery> takeMediaQuery(); |
| 36 |
| 37 inline bool currentMediaQueryChanged() const |
| 38 { |
| 39 return (m_restrictor != MediaQuery::None || m_mediaTypeSet || m_expressi
ons->size() > 0); |
| 40 } |
| 41 |
| 42 inline void setRestrictor(MediaQuery::Restrictor restrictor) { m_restrictor
= restrictor; } |
| 43 |
| 44 inline void setMediaFeature(const String& str) { m_mediaFeature = str; } |
| 45 }; |
| 46 |
| 47 class MediaQueryParser { |
| 48 public: |
| 49 static PassRefPtrWillBeRawPtr<MediaQuerySet> parse(const String&); |
| 50 |
| 51 private: |
| 52 MediaQueryParser(const String&); |
| 53 virtual ~MediaQueryParser() { }; |
| 54 |
| 55 PassRefPtrWillBeRawPtr<MediaQuerySet> parseImpl(); |
| 56 |
| 57 typedef Vector<MediaQueryToken>::iterator TokenIterator; |
| 58 |
| 59 void processToken(TokenIterator&); |
| 60 |
| 61 void readRestrictor(MediaQueryTokenType, TokenIterator&); |
| 62 void readMediaType(MediaQueryTokenType, TokenIterator&); |
| 63 void readAnd(MediaQueryTokenType, TokenIterator&); |
| 64 void readFeatureStart(MediaQueryTokenType, TokenIterator&); |
| 65 void readFeature(MediaQueryTokenType, TokenIterator&); |
| 66 void readFeatureColon(MediaQueryTokenType, TokenIterator&); |
| 67 void readFeatureValue(MediaQueryTokenType, TokenIterator&); |
| 68 void readFeatureEnd(MediaQueryTokenType, TokenIterator&); |
| 69 void skipUntilComma(MediaQueryTokenType, TokenIterator&); |
| 70 void skipUntilParenthesis(MediaQueryTokenType, TokenIterator&); |
| 71 void done(MediaQueryTokenType, TokenIterator&); |
| 72 |
| 73 typedef void (MediaQueryParser::*State)(MediaQueryTokenType, TokenIterator&)
; |
| 74 |
| 75 void setStateAndRestrict(State, MediaQuery::Restrictor); |
| 76 |
| 77 State m_state; |
| 78 Vector<MediaQueryToken> m_tokens; |
| 79 MediaQueryData m_mediaQueryData; |
| 80 RefPtrWillBeMember<MediaQuerySet> m_querySet; |
| 81 |
| 82 const static State ReadRestrictor; |
| 83 const static State ReadMediaType; |
| 84 const static State ReadAnd; |
| 85 const static State ReadFeatureStart; |
| 86 const static State ReadFeature; |
| 87 const static State ReadFeatureColon; |
| 88 const static State ReadFeatureValue; |
| 89 const static State ReadFeatureEnd; |
| 90 const static State SkipUntilComma; |
| 91 const static State SkipUntilParenthesis; |
| 92 const static State Done; |
| 93 |
| 94 }; |
| 95 |
| 96 } // namespace WebCore |
| 97 |
| 98 #endif // MediaQueryParser_h |
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