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 "CSSPrimitiveValue.h" |
33 | #include <wtf/text/StringView.h> |
34 | |
35 | namespace WebCore { |
36 | |
37 | enum CSSParserTokenType { |
38 | IdentToken = 0, |
39 | FunctionToken, |
40 | AtKeywordToken, |
41 | HashToken, |
42 | UrlToken, |
43 | BadUrlToken, |
44 | DelimiterToken, |
45 | NumberToken, |
46 | PercentageToken, |
47 | DimensionToken, |
48 | IncludeMatchToken, |
49 | DashMatchToken, |
50 | PrefixMatchToken, |
51 | SuffixMatchToken, |
52 | SubstringMatchToken, |
53 | ColumnToken, |
54 | UnicodeRangeToken, |
55 | WhitespaceToken, |
56 | CDOToken, |
57 | CDCToken, |
58 | ColonToken, |
59 | SemicolonToken, |
60 | CommaToken, |
61 | LeftParenthesisToken, |
62 | RightParenthesisToken, |
63 | LeftBracketToken, |
64 | RightBracketToken, |
65 | LeftBraceToken, |
66 | RightBraceToken, |
67 | StringToken, |
68 | BadStringToken, |
69 | EOFToken, |
70 | , |
71 | }; |
72 | |
73 | enum NumericSign { |
74 | NoSign, |
75 | PlusSign, |
76 | MinusSign, |
77 | }; |
78 | |
79 | enum NumericValueType { |
80 | IntegerValueType, |
81 | NumberValueType, |
82 | }; |
83 | |
84 | enum HashTokenType { |
85 | HashTokenId, |
86 | HashTokenUnrestricted, |
87 | }; |
88 | |
89 | class CSSParserToken { |
90 | WTF_MAKE_FAST_ALLOCATED; |
91 | public: |
92 | enum BlockType { |
93 | NotBlock, |
94 | BlockStart, |
95 | BlockEnd, |
96 | }; |
97 | |
98 | CSSParserToken(CSSParserTokenType, BlockType = NotBlock); |
99 | CSSParserToken(CSSParserTokenType, StringView, BlockType = NotBlock); |
100 | |
101 | CSSParserToken(CSSParserTokenType, UChar); // for DelimiterToken |
102 | CSSParserToken(CSSParserTokenType, double, NumericValueType, NumericSign); // for NumberToken |
103 | CSSParserToken(CSSParserTokenType, UChar32, UChar32); // for UnicodeRangeToken |
104 | |
105 | CSSParserToken(HashTokenType, StringView); |
106 | |
107 | bool operator==(const CSSParserToken& other) const; |
108 | bool operator!=(const CSSParserToken& other) const { return !(*this == other); } |
109 | |
110 | // Converts NumberToken to DimensionToken. |
111 | void convertToDimensionWithUnit(StringView); |
112 | |
113 | // Converts NumberToken to PercentageToken. |
114 | void convertToPercentage(); |
115 | |
116 | CSSParserTokenType type() const { return static_cast<CSSParserTokenType>(m_type); } |
117 | StringView value() const |
118 | { |
119 | if (m_valueIs8Bit) |
120 | return StringView(static_cast<const LChar*>(m_valueDataCharRaw), m_valueLength); |
121 | return StringView(static_cast<const UChar*>(m_valueDataCharRaw), m_valueLength); |
122 | } |
123 | |
124 | UChar delimiter() const; |
125 | NumericSign numericSign() const; |
126 | NumericValueType numericValueType() const; |
127 | double numericValue() const; |
128 | HashTokenType getHashTokenType() const { ASSERT(m_type == HashToken); return m_hashTokenType; } |
129 | BlockType getBlockType() const { return static_cast<BlockType>(m_blockType); } |
130 | CSSPrimitiveValue::UnitType unitType() const { return static_cast<CSSPrimitiveValue::UnitType>(m_unit); } |
131 | UChar32 unicodeRangeStart() const { ASSERT(m_type == UnicodeRangeToken); return m_unicodeRange.start; } |
132 | UChar32 unicodeRangeEnd() const { ASSERT(m_type == UnicodeRangeToken); return m_unicodeRange.end; } |
133 | CSSValueID id() const; |
134 | CSSValueID functionId() const; |
135 | |
136 | bool hasStringBacking() const; |
137 | |
138 | CSSPropertyID parseAsCSSPropertyID() const; |
139 | |
140 | void serialize(StringBuilder&) const; |
141 | |
142 | CSSParserToken copyWithUpdatedString(const StringView&) const; |
143 | |
144 | private: |
145 | void initValueFromStringView(StringView string) |
146 | { |
147 | m_valueLength = string.length(); |
148 | m_valueIs8Bit = string.is8Bit(); |
149 | m_valueDataCharRaw = m_valueIs8Bit ? const_cast<void*>(static_cast<const void*>(string.characters8())) : const_cast<void*>(static_cast<const void*>(string.characters16())); |
150 | } |
151 | unsigned m_type : 6; // CSSParserTokenType |
152 | unsigned m_blockType : 2; // BlockType |
153 | unsigned m_numericValueType : 1; // NumericValueType |
154 | unsigned m_numericSign : 2; // NumericSign |
155 | unsigned m_unit : 7; // CSSPrimitiveValue::UnitType |
156 | |
157 | bool valueDataCharRawEqual(const CSSParserToken& other) const; |
158 | |
159 | // m_value... is an unpacked StringView so that we can pack it |
160 | // tightly with the rest of this object for a smaller object size. |
161 | bool m_valueIs8Bit : 1; |
162 | unsigned m_valueLength; |
163 | void* m_valueDataCharRaw; // Either LChar* or UChar*. |
164 | |
165 | union { |
166 | UChar m_delimiter; |
167 | HashTokenType m_hashTokenType; |
168 | double m_numericValue; |
169 | mutable int m_id; |
170 | |
171 | struct { |
172 | UChar32 start; |
173 | UChar32 end; |
174 | } m_unicodeRange; |
175 | }; |
176 | }; |
177 | |
178 | } // namespace WebCore |
179 | |