1 | // Copyright 2016 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 "CSSFunctionValue.h" |
33 | #include "CSSParserContext.h" |
34 | #include "CSSParserTokenRange.h" |
35 | #include "CSSPrimitiveValue.h" |
36 | #include "CSSShadowValue.h" |
37 | #include "CSSValuePool.h" |
38 | #include "Length.h" // For ValueRange |
39 | |
40 | namespace WebCore { |
41 | |
42 | // When these functions are successful, they will consume all the relevant |
43 | // tokens from the range and also consume any whitespace which follows. When |
44 | // the start of the range doesn't match the type we're looking for, the range |
45 | // will not be modified. |
46 | namespace CSSPropertyParserHelpers { |
47 | |
48 | // FIXME: These should probably just be consumeComma and consumeSlash. |
49 | bool consumeCommaIncludingWhitespace(CSSParserTokenRange&); |
50 | bool consumeSlashIncludingWhitespace(CSSParserTokenRange&); |
51 | // consumeFunction expects the range starts with a FunctionToken. |
52 | CSSParserTokenRange consumeFunction(CSSParserTokenRange&); |
53 | |
54 | enum class UnitlessQuirk { |
55 | Allow, |
56 | Forbid |
57 | }; |
58 | |
59 | RefPtr<CSSPrimitiveValue> consumeInteger(CSSParserTokenRange&, double minimumValue = -std::numeric_limits<double>::max()); |
60 | bool consumePositiveIntegerRaw(CSSParserTokenRange&, int& result); |
61 | RefPtr<CSSPrimitiveValue> consumePositiveInteger(CSSParserTokenRange&); |
62 | bool (CSSParserTokenRange&, double& result); |
63 | RefPtr<CSSPrimitiveValue> (CSSParserTokenRange&, ValueRange); |
64 | RefPtr<CSSPrimitiveValue> consumeFontWeightNumber(CSSParserTokenRange&); |
65 | RefPtr<CSSPrimitiveValue> consumeLength(CSSParserTokenRange&, CSSParserMode, ValueRange, UnitlessQuirk = UnitlessQuirk::Forbid); |
66 | RefPtr<CSSPrimitiveValue> consumePercent(CSSParserTokenRange&, ValueRange); |
67 | RefPtr<CSSPrimitiveValue> consumeLengthOrPercent(CSSParserTokenRange&, CSSParserMode, ValueRange, UnitlessQuirk = UnitlessQuirk::Forbid); |
68 | RefPtr<CSSPrimitiveValue> consumeAngle(CSSParserTokenRange&, CSSParserMode, UnitlessQuirk = UnitlessQuirk::Forbid); |
69 | RefPtr<CSSPrimitiveValue> consumeTime(CSSParserTokenRange&, CSSParserMode, ValueRange, UnitlessQuirk = UnitlessQuirk::Forbid); |
70 | RefPtr<CSSPrimitiveValue> consumeResolution(CSSParserTokenRange&); |
71 | |
72 | RefPtr<CSSPrimitiveValue> consumeIdent(CSSParserTokenRange&); |
73 | RefPtr<CSSPrimitiveValue> consumeIdentRange(CSSParserTokenRange&, CSSValueID lower, CSSValueID upper); |
74 | template<CSSValueID, CSSValueID...> inline bool identMatches(CSSValueID id); |
75 | template<CSSValueID... allowedIdents> RefPtr<CSSPrimitiveValue> consumeIdent(CSSParserTokenRange&); |
76 | |
77 | RefPtr<CSSPrimitiveValue> consumeCustomIdent(CSSParserTokenRange&); |
78 | RefPtr<CSSPrimitiveValue> consumeString(CSSParserTokenRange&); |
79 | StringView consumeUrlAsStringView(CSSParserTokenRange&); |
80 | RefPtr<CSSPrimitiveValue> consumeUrl(CSSParserTokenRange&); |
81 | |
82 | RefPtr<CSSPrimitiveValue> consumeColor(CSSParserTokenRange&, CSSParserMode, bool acceptQuirkyColors = false); |
83 | |
84 | RefPtr<CSSPrimitiveValue> consumePosition(CSSParserTokenRange&, CSSParserMode, UnitlessQuirk); |
85 | bool consumePosition(CSSParserTokenRange&, CSSParserMode, UnitlessQuirk, RefPtr<CSSPrimitiveValue>& resultX, RefPtr<CSSPrimitiveValue>& resultY); |
86 | bool consumeOneOrTwoValuedPosition(CSSParserTokenRange&, CSSParserMode, UnitlessQuirk, RefPtr<CSSPrimitiveValue>& resultX, RefPtr<CSSPrimitiveValue>& resultY); |
87 | |
88 | enum class ConsumeGeneratedImage { |
89 | Allow, |
90 | Forbid |
91 | }; |
92 | |
93 | RefPtr<CSSValue> consumeImage(CSSParserTokenRange&, CSSParserContext, ConsumeGeneratedImage = ConsumeGeneratedImage::Allow); |
94 | RefPtr<CSSValue> consumeImageOrNone(CSSParserTokenRange&, CSSParserContext); |
95 | |
96 | enum class AllowedFilterFunctions { |
97 | PixelFilters, |
98 | ColorFilters |
99 | }; |
100 | |
101 | RefPtr<CSSValue> consumeFilter(CSSParserTokenRange&, const CSSParserContext&, AllowedFilterFunctions); |
102 | RefPtr<CSSShadowValue> consumeSingleShadow(CSSParserTokenRange&, CSSParserMode, bool allowInset, bool allowSpread); |
103 | |
104 | // Template implementations are at the bottom of the file for readability. |
105 | |
106 | template<typename... emptyBaseCase> inline bool identMatches(CSSValueID) { return false; } |
107 | template<CSSValueID head, CSSValueID... tail> inline bool identMatches(CSSValueID id) |
108 | { |
109 | return id == head || identMatches<tail...>(id); |
110 | } |
111 | |
112 | // FIXME-NEWPARSER - converted to a RefPtr return type from a raw ptr. |
113 | template<CSSValueID... names> RefPtr<CSSPrimitiveValue> consumeIdent(CSSParserTokenRange& range) |
114 | { |
115 | if (range.peek().type() != IdentToken || !identMatches<names...>(range.peek().id())) |
116 | return nullptr; |
117 | return CSSValuePool::singleton().createIdentifierValue(range.consumeIncludingWhitespace().id()); |
118 | } |
119 | |
120 | static inline bool isCSSWideKeyword(const CSSValueID& id) |
121 | { |
122 | return id == CSSValueInitial || id == CSSValueInherit || id == CSSValueUnset || id == CSSValueRevert || id == CSSValueDefault; |
123 | } |
124 | |
125 | } // namespace CSSPropertyParserHelpers |
126 | |
127 | } // namespace WebCore |
128 | |