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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "config.h" | 5 #include "config.h" |
6 #include "SizesAttributeParser.h" | 6 #include "SizesAttributeParser.h" |
7 | 7 |
8 #include "MediaTypeNames.h" | 8 #include "MediaTypeNames.h" |
9 #include "core/css/MediaQueryEvaluator.h" | 9 #include "core/css/MediaQueryEvaluator.h" |
10 #include "core/css/parser/MediaQueryTokenizer.h" | 10 #include "core/css/parser/MediaQueryTokenizer.h" |
11 | 11 |
12 namespace WebCore { | 12 namespace WebCore { |
13 | 13 |
14 unsigned SizesAttributeParser::findEffectiveSize(const String& attribute, PassRe fPtr<MediaValues> mediaValues) | 14 unsigned SizesAttributeParser::findEffectiveSize(const String& attribute, PassRe fPtr<MediaValues> mediaValues) |
15 { | 15 { |
16 Vector<MediaQueryToken> tokens; | 16 Vector<MediaQueryToken> tokens; |
17 SizesAttributeParser parser(mediaValues); | 17 SizesAttributeParser parser(mediaValues); |
18 | 18 |
19 MediaQueryTokenizer::tokenize(attribute, tokens); | 19 MediaQueryTokenizer::tokenize(attribute, tokens); |
20 if (!parser.parse(tokens)) | 20 if (!parser.parse(tokens)) |
21 return parser.effectiveSizeDefaultValue(); | 21 return parser.effectiveSizeDefaultValue(); |
22 return parser.effectiveSize(); | 22 return parser.effectiveSize(); |
23 } | 23 } |
24 | 24 |
25 bool SizesAttributeParser::calculateLengthInPixels(TokenIterator startToken, Tok enIterator endToken, unsigned& result) | 25 bool SizesAttributeParser::calculateLengthInPixels(TokenIterator startToken, Tok enIterator endToken, unsigned& result) |
26 { | 26 { |
27 MediaQueryTokenType type = startToken->type(); | 27 MediaQueryTokenType type = startToken->type(); |
28 if (type == DimensionToken) { | 28 if (type == DimensionToken) { |
29 int length; | 29 int length; |
30 if (!CSSPrimitiveValue::isLength(startToken->unitType())) | 30 if (CSSPrimitiveValue::isLength(startToken->unitType()) |
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2014/04/20 22:06:21
I think this previous early-return based version w
| |
31 return false; | 31 && m_mediaValues->computeLength(startToken->numericValue(), startTok en->unitType(), length)) { |
32 if (m_mediaValues->computeLength(startToken->numericValue(), startToken- >unitType(), length)) { | |
33 if (length > 0) { | 32 if (length > 0) { |
34 result = (unsigned)length; | 33 result = (unsigned)length; |
35 return true; | 34 return true; |
36 } | 35 } |
37 } | 36 } |
37 return false; | |
38 } | 38 } |
39 if (type == FunctionToken) { | 39 // FIXME - Handle calc() FunctionToken here! |
40 // FIXME - Handle calc() functions here! | |
41 } | |
42 return false; | 40 return false; |
43 } | 41 } |
44 | 42 |
45 static void reverseSkipIrrelevantTokens(TokenIterator& token, TokenIterator star tToken) | 43 static void reverseSkipIrrelevantTokens(TokenIterator& token, TokenIterator star tToken) |
46 { | 44 { |
47 TokenIterator endToken = token; | 45 TokenIterator endToken = token; |
48 while (token != startToken && (token->type() == WhitespaceToken || token->ty pe() == CommentToken || token->type() == EOFToken)) | 46 while (token != startToken && (token->type() == WhitespaceToken || token->ty pe() == CommentToken || token->type() == EOFToken)) |
49 --token; | 47 --token; |
50 if (token != endToken) | 48 if (token != endToken) |
51 ++token; | 49 ++token; |
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94 RefPtrWillBeRawPtr<MediaQuerySet> mediaCondition = MediaQueryParser::parseMe diaCondition(startToken, endToken); | 92 RefPtrWillBeRawPtr<MediaQuerySet> mediaCondition = MediaQueryParser::parseMe diaCondition(startToken, endToken); |
95 if (mediaCondition && mediaConditionMatches(mediaCondition)) { | 93 if (mediaCondition && mediaConditionMatches(mediaCondition)) { |
96 m_length = length; | 94 m_length = length; |
97 return true; | 95 return true; |
98 } | 96 } |
99 return false; | 97 return false; |
100 } | 98 } |
101 | 99 |
102 bool SizesAttributeParser::parse(Vector<MediaQueryToken>& tokens) | 100 bool SizesAttributeParser::parse(Vector<MediaQueryToken>& tokens) |
103 { | 101 { |
102 if (tokens.isEmpty()) | |
103 return false; | |
104 TokenIterator startToken = tokens.begin(); | 104 TokenIterator startToken = tokens.begin(); |
105 TokenIterator endToken; | 105 TokenIterator endToken; |
106 // Split on a comma token, and send the result tokens to be parsed as (media -condition, length) pairs | 106 // Split on a comma token, and send the result tokens to be parsed as (media -condition, length) pairs |
107 for (TokenIterator token = tokens.begin(); token != tokens.end(); ++token) { | 107 for (TokenIterator token = tokens.begin(); token != tokens.end(); ++token) { |
108 if (token->type() == CommaToken) { | 108 if (token->type() == CommaToken) { |
109 endToken = token; | 109 endToken = token; |
110 if (parseMediaConditionAndLength(startToken, endToken)) | 110 if (parseMediaConditionAndLength(startToken, endToken)) |
111 return true; | 111 return true; |
112 startToken = token; | 112 startToken = token; |
113 ++startToken; | 113 ++startToken; |
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125 } | 125 } |
126 | 126 |
127 unsigned SizesAttributeParser::effectiveSizeDefaultValue() | 127 unsigned SizesAttributeParser::effectiveSizeDefaultValue() |
128 { | 128 { |
129 // Returning the equivalent of "100%" | 129 // Returning the equivalent of "100%" |
130 return m_mediaValues->viewportWidth(); | 130 return m_mediaValues->viewportWidth(); |
131 } | 131 } |
132 | 132 |
133 } // namespace | 133 } // namespace |
134 | 134 |
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