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1 /* | 1 /* |
2 * Copyright (C) 2013 Google Inc. All rights reserved. | 2 * Copyright (C) 2013 Google Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions are | 5 * modification, are permitted provided that the following conditions are |
6 * met: | 6 * met: |
7 * | 7 * |
8 * * Redistributions of source code must retain the above copyright | 8 * * Redistributions of source code must retain the above copyright |
9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
10 * * Redistributions in binary form must reproduce the above | 10 * * Redistributions in binary form must reproduce the above |
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23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | 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. | 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
29 */ | 29 */ |
30 | 30 |
31 #include "core/html/HTMLDimension.h" | 31 #include "core/html/HTMLDimension.h" |
32 | 32 |
| 33 #include "core/html/parser/HTMLParserIdioms.h" |
33 #include "wtf/MathExtras.h" | 34 #include "wtf/MathExtras.h" |
| 35 #include "wtf/text/ParsingUtilities.h" |
34 #include "wtf/text/StringToNumber.h" | 36 #include "wtf/text/StringToNumber.h" |
35 #include "wtf/text/WTFString.h" | 37 #include "wtf/text/WTFString.h" |
36 | 38 |
37 namespace blink { | 39 namespace blink { |
38 | 40 |
39 template <typename CharacterType> | 41 template <typename CharacterType> |
40 static HTMLDimension parseDimension(const CharacterType* characters, | 42 static HTMLDimension parseDimension(const CharacterType* characters, |
41 size_t lastParsedIndex, | 43 size_t lastParsedIndex, |
42 size_t endOfCurrentToken) { | 44 size_t endOfCurrentToken) { |
43 HTMLDimension::HTMLDimensionType type = HTMLDimension::Absolute; | 45 HTMLDimension::HTMLDimensionType type = HTMLDimension::Absolute; |
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139 parsedDimensions.append( | 141 parsedDimensions.append( |
140 parseDimension(trimmedString, lastParsedIndex, nextComma)); | 142 parseDimension(trimmedString, lastParsedIndex, nextComma)); |
141 lastParsedIndex = nextComma + 1; | 143 lastParsedIndex = nextComma + 1; |
142 } | 144 } |
143 | 145 |
144 parsedDimensions.append( | 146 parsedDimensions.append( |
145 parseDimension(trimmedString, lastParsedIndex, trimmedString.length())); | 147 parseDimension(trimmedString, lastParsedIndex, trimmedString.length())); |
146 return parsedDimensions; | 148 return parsedDimensions; |
147 } | 149 } |
148 | 150 |
| 151 template <typename CharacterType> |
| 152 static bool parseDimensionValue(const CharacterType* current, |
| 153 const CharacterType* end, |
| 154 HTMLDimension& dimension) { |
| 155 skipWhile<CharacterType, isHTMLSpace>(current, end); |
| 156 // Deviation: HTML allows '+' here. |
| 157 const CharacterType* numberStart = current; |
| 158 if (!skipExactly<CharacterType, isASCIIDigit>(current, end)) |
| 159 return false; |
| 160 skipWhile<CharacterType, isASCIIDigit>(current, end); |
| 161 if (skipExactly<CharacterType>(current, end, '.')) { |
| 162 // Deviation: HTML requires a digit after the full stop to be able to treat |
| 163 // the value as a percentage (if not, the '.' will considered "garbage", |
| 164 // yielding a regular length.) Gecko and Edge does not. |
| 165 skipWhile<CharacterType, isASCIIDigit>(current, end); |
| 166 } |
| 167 bool ok; |
| 168 double value = charactersToDouble(numberStart, current - numberStart, &ok); |
| 169 if (!ok) |
| 170 return false; |
| 171 HTMLDimension::HTMLDimensionType type = HTMLDimension::Absolute; |
| 172 if (current < end) { |
| 173 if (*current == '%') { |
| 174 type = HTMLDimension::Percentage; |
| 175 } else if (*current == '*') { |
| 176 // Deviation: HTML does not recognize '*' in this context, and we don't |
| 177 // treat it as a valid value. We do count it though, so this is purely |
| 178 // for statistics. Note though that per the specced behavior, "<number>*" |
| 179 // would be the same as "<number>" (i.e '*' would just be trailing |
| 180 // garbage.) |
| 181 type = HTMLDimension::Relative; |
| 182 } |
| 183 } |
| 184 dimension = HTMLDimension(value, type); |
| 185 return true; |
| 186 } |
| 187 |
| 188 // https://html.spec.whatwg.org/multipage/infrastructure.html#rules-for-parsing-
dimension-values |
| 189 bool parseDimensionValue(const String& input, HTMLDimension& dimension) { |
| 190 if (input.isEmpty()) |
| 191 return false; |
| 192 if (input.is8Bit()) { |
| 193 return parseDimensionValue(input.characters8(), |
| 194 input.characters8() + input.length(), dimension); |
| 195 } |
| 196 return parseDimensionValue(input.characters16(), |
| 197 input.characters16() + input.length(), dimension); |
| 198 } |
| 199 |
149 } // namespace blink | 200 } // namespace blink |
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