1 | // Copyright 2014 The Chromium Authors. All rights reserved. |
2 | // Copyright (C) 2016 Apple Inc. All rights reserved. |
3 | // |
4 | // Redistribution and use in source and binary forms, with or without |
5 | // modification, are permitted provided that the following conditions are |
6 | // met: |
7 | // |
8 | // * Redistributions of source code must retain the above copyright |
9 | // notice, this list of conditions and the following disclaimer. |
10 | // * Redistributions in binary form must reproduce the above |
11 | // copyright notice, this list of conditions and the following disclaimer |
12 | // in the documentation and/or other materials provided with the |
13 | // distribution. |
14 | // * Neither the name of Google Inc. nor the names of its |
15 | // contributors may be used to endorse or promote products derived from |
16 | // this software without specific prior written permission. |
17 | // |
18 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
19 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
20 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
21 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
22 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
23 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
24 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
25 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
26 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
27 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
28 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
29 | |
30 | #pragma once |
31 | |
32 | #include "CSSParserToken.h" |
33 | #include "CSSParserTokenRange.h" |
34 | #include "MediaQuery.h" |
35 | #include "MediaQueryBlockWatcher.h" |
36 | #include "MediaQueryExpression.h" |
37 | #include "MediaQueryParserContext.h" |
38 | #include <wtf/Optional.h> |
39 | #include <wtf/text/WTFString.h> |
40 | |
41 | namespace WebCore { |
42 | |
43 | class MediaQuerySet; |
44 | struct CSSParserContext; |
45 | |
46 | class MediaQueryParser { |
47 | WTF_MAKE_NONCOPYABLE(MediaQueryParser); |
48 | public: |
49 | static RefPtr<MediaQuerySet> parseMediaQuerySet(const String&, MediaQueryParserContext); |
50 | static RefPtr<MediaQuerySet> parseMediaQuerySet(CSSParserTokenRange, MediaQueryParserContext); |
51 | static RefPtr<MediaQuerySet> parseMediaCondition(CSSParserTokenRange, MediaQueryParserContext); |
52 | |
53 | private: |
54 | enum ParserType { |
55 | MediaQuerySetParser, |
56 | MediaConditionParser, |
57 | }; |
58 | |
59 | MediaQueryParser(ParserType, MediaQueryParserContext); |
60 | virtual ~MediaQueryParser(); |
61 | |
62 | RefPtr<MediaQuerySet> parseInternal(CSSParserTokenRange); |
63 | |
64 | void processToken(const CSSParserToken&, CSSParserTokenRange&); |
65 | |
66 | void readRestrictor(CSSParserTokenType, const CSSParserToken&, CSSParserTokenRange&); |
67 | void readMediaNot(CSSParserTokenType, const CSSParserToken&, CSSParserTokenRange&); |
68 | void readMediaType(CSSParserTokenType, const CSSParserToken&, CSSParserTokenRange&); |
69 | void readAnd(CSSParserTokenType, const CSSParserToken&, CSSParserTokenRange&); |
70 | void readFeatureStart(CSSParserTokenType, const CSSParserToken&, CSSParserTokenRange&); |
71 | void readFeature(CSSParserTokenType, const CSSParserToken&, CSSParserTokenRange&); |
72 | void readFeatureColon(CSSParserTokenType, const CSSParserToken&, CSSParserTokenRange&); |
73 | void readFeatureValue(CSSParserTokenType, const CSSParserToken&, CSSParserTokenRange&); |
74 | void readFeatureEnd(CSSParserTokenType, const CSSParserToken&, CSSParserTokenRange&); |
75 | void skipUntilComma(CSSParserTokenType, const CSSParserToken&, CSSParserTokenRange&); |
76 | void skipUntilBlockEnd(CSSParserTokenType, const CSSParserToken&, CSSParserTokenRange&); |
77 | void done(CSSParserTokenType, const CSSParserToken&, CSSParserTokenRange&); |
78 | |
79 | using State = void (MediaQueryParser::*)(CSSParserTokenType, const CSSParserToken&, CSSParserTokenRange&); |
80 | |
81 | void setStateAndRestrict(State, MediaQuery::Restrictor); |
82 | void handleBlocks(const CSSParserToken&); |
83 | |
84 | void commitMediaQuery(); |
85 | |
86 | class MediaQueryData { |
87 | WTF_MAKE_NONCOPYABLE(MediaQueryData); |
88 | public: |
89 | explicit MediaQueryData(MediaQueryParserContext); |
90 | void clear(); |
91 | void addExpression(CSSParserTokenRange&); |
92 | bool lastExpressionValid(); |
93 | void removeLastExpression(); |
94 | void setMediaType(const String& mediaType) { m_mediaType = mediaType; } |
95 | |
96 | MediaQuery::Restrictor restrictor() const { return m_restrictor; } |
97 | Vector<MediaQueryExpression>& expressions() { return m_expressions; } |
98 | const Optional<String>& mediaType() const { return m_mediaType; } |
99 | |
100 | bool currentMediaQueryChanged() const |
101 | { |
102 | return (m_restrictor != MediaQuery::None || m_mediaType || !m_expressions.isEmpty()); |
103 | } |
104 | MediaQuery::Restrictor restrictor() { return m_restrictor; } |
105 | |
106 | void setRestrictor(MediaQuery::Restrictor restrictor) { m_restrictor = restrictor; } |
107 | |
108 | void setMediaFeature(const String& str) { m_mediaFeature = str; } |
109 | |
110 | void setMediaQueryParserContext(MediaQueryParserContext context) { m_context = context; } |
111 | |
112 | private: |
113 | MediaQuery::Restrictor m_restrictor { MediaQuery::None }; |
114 | Optional<String> m_mediaType; |
115 | Vector<MediaQueryExpression> m_expressions; |
116 | String m_mediaFeature; |
117 | MediaQueryParserContext m_context; |
118 | }; |
119 | |
120 | State m_state; |
121 | ParserType m_parserType; |
122 | MediaQueryData m_mediaQueryData; |
123 | RefPtr<MediaQuerySet> m_querySet; |
124 | MediaQueryBlockWatcher m_blockWatcher; |
125 | |
126 | const static State ReadRestrictor; |
127 | const static State ReadMediaNot; |
128 | const static State ReadMediaType; |
129 | const static State ReadAnd; |
130 | const static State ReadFeatureStart; |
131 | const static State ReadFeature; |
132 | const static State ReadFeatureColon; |
133 | const static State ReadFeatureValue; |
134 | const static State ReadFeatureEnd; |
135 | const static State SkipUntilComma; |
136 | const static State SkipUntilBlockEnd; |
137 | const static State Done; |
138 | }; |
139 | |
140 | } // namespace WebCore |
141 | |