Torne (Richard Coles) | 53e740f | 2013-05-09 18:38:43 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2004, 2005, 2006 Nikolas Zimmermann <zimmermann@kde.org> |
| 3 | * Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org> |
| 4 | * Copyright (C) 2007 Apple Inc. All rights reserved. |
| 5 | * |
| 6 | * This library is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU Library General Public |
| 8 | * License as published by the Free Software Foundation; either |
| 9 | * version 2 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * This library is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * Library General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Library General Public License |
| 17 | * along with this library; see the file COPYING.LIB. If not, write to |
| 18 | * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| 19 | * Boston, MA 02110-1301, USA. |
| 20 | */ |
| 21 | |
| 22 | #include "config.h" |
| 23 | |
Torne (Richard Coles) | 53e740f | 2013-05-09 18:38:43 +0100 | [diff] [blame] | 24 | #include "core/svg/SVGLength.h" |
| 25 | |
| 26 | #include "SVGNames.h" |
Torne (Richard Coles) | 53e740f | 2013-05-09 18:38:43 +0100 | [diff] [blame] | 27 | #include "core/css/CSSPrimitiveValue.h" |
| 28 | #include "core/dom/ExceptionCode.h" |
| 29 | #include "core/dom/ExceptionCodePlaceholder.h" |
Torne (Richard Coles) | 53e740f | 2013-05-09 18:38:43 +0100 | [diff] [blame] | 30 | #include "core/svg/SVGParserUtilities.h" |
| 31 | |
| 32 | #include <wtf/MathExtras.h> |
| 33 | #include <wtf/text/WTFString.h> |
| 34 | |
| 35 | namespace WebCore { |
| 36 | |
| 37 | // Helper functions |
| 38 | static inline unsigned int storeUnit(SVGLengthMode mode, SVGLengthType type) |
| 39 | { |
| 40 | return (mode << 4) | type; |
| 41 | } |
| 42 | |
| 43 | static inline SVGLengthMode extractMode(unsigned int unit) |
| 44 | { |
| 45 | unsigned int mode = unit >> 4; |
| 46 | return static_cast<SVGLengthMode>(mode); |
| 47 | } |
| 48 | |
| 49 | static inline SVGLengthType extractType(unsigned int unit) |
| 50 | { |
| 51 | unsigned int mode = unit >> 4; |
| 52 | unsigned int type = unit ^ (mode << 4); |
| 53 | return static_cast<SVGLengthType>(type); |
| 54 | } |
| 55 | |
| 56 | static inline String lengthTypeToString(SVGLengthType type) |
| 57 | { |
| 58 | switch (type) { |
| 59 | case LengthTypeUnknown: |
| 60 | case LengthTypeNumber: |
| 61 | return ""; |
| 62 | case LengthTypePercentage: |
| 63 | return "%"; |
| 64 | case LengthTypeEMS: |
| 65 | return "em"; |
| 66 | case LengthTypeEXS: |
| 67 | return "ex"; |
| 68 | case LengthTypePX: |
| 69 | return "px"; |
| 70 | case LengthTypeCM: |
| 71 | return "cm"; |
| 72 | case LengthTypeMM: |
| 73 | return "mm"; |
| 74 | case LengthTypeIN: |
| 75 | return "in"; |
| 76 | case LengthTypePT: |
| 77 | return "pt"; |
| 78 | case LengthTypePC: |
| 79 | return "pc"; |
| 80 | } |
| 81 | |
| 82 | ASSERT_NOT_REACHED(); |
| 83 | return String(); |
| 84 | } |
| 85 | |
| 86 | inline SVGLengthType stringToLengthType(const UChar*& ptr, const UChar* end) |
| 87 | { |
| 88 | if (ptr == end) |
| 89 | return LengthTypeNumber; |
| 90 | |
| 91 | const UChar firstChar = *ptr; |
| 92 | |
| 93 | if (++ptr == end) |
| 94 | return firstChar == '%' ? LengthTypePercentage : LengthTypeUnknown; |
| 95 | |
| 96 | const UChar secondChar = *ptr; |
| 97 | |
| 98 | if (++ptr != end) |
| 99 | return LengthTypeUnknown; |
| 100 | |
| 101 | if (firstChar == 'e' && secondChar == 'm') |
| 102 | return LengthTypeEMS; |
| 103 | if (firstChar == 'e' && secondChar == 'x') |
| 104 | return LengthTypeEXS; |
| 105 | if (firstChar == 'p' && secondChar == 'x') |
| 106 | return LengthTypePX; |
| 107 | if (firstChar == 'c' && secondChar == 'm') |
| 108 | return LengthTypeCM; |
| 109 | if (firstChar == 'm' && secondChar == 'm') |
| 110 | return LengthTypeMM; |
| 111 | if (firstChar == 'i' && secondChar == 'n') |
| 112 | return LengthTypeIN; |
| 113 | if (firstChar == 'p' && secondChar == 't') |
| 114 | return LengthTypePT; |
| 115 | if (firstChar == 'p' && secondChar == 'c') |
| 116 | return LengthTypePC; |
| 117 | |
| 118 | return LengthTypeUnknown; |
| 119 | } |
| 120 | |
| 121 | SVGLength::SVGLength(SVGLengthMode mode, const String& valueAsString) |
| 122 | : m_valueInSpecifiedUnits(0) |
| 123 | , m_unit(storeUnit(mode, LengthTypeNumber)) |
| 124 | { |
| 125 | setValueAsString(valueAsString, IGNORE_EXCEPTION); |
| 126 | } |
| 127 | |
| 128 | SVGLength::SVGLength(const SVGLengthContext& context, float value, SVGLengthMode mode, SVGLengthType unitType) |
| 129 | : m_valueInSpecifiedUnits(0) |
| 130 | , m_unit(storeUnit(mode, unitType)) |
| 131 | { |
| 132 | setValue(value, context, ASSERT_NO_EXCEPTION); |
| 133 | } |
| 134 | |
| 135 | SVGLength::SVGLength(const SVGLength& other) |
| 136 | : m_valueInSpecifiedUnits(other.m_valueInSpecifiedUnits) |
| 137 | , m_unit(other.m_unit) |
| 138 | { |
| 139 | } |
| 140 | |
| 141 | void SVGLength::setValueAsString(const String& valueAsString, SVGLengthMode mode, ExceptionCode& ec) |
| 142 | { |
| 143 | m_valueInSpecifiedUnits = 0; |
| 144 | m_unit = storeUnit(mode, LengthTypeNumber); |
| 145 | setValueAsString(valueAsString, ec); |
| 146 | } |
| 147 | |
| 148 | bool SVGLength::operator==(const SVGLength& other) const |
| 149 | { |
| 150 | return m_unit == other.m_unit |
| 151 | && m_valueInSpecifiedUnits == other.m_valueInSpecifiedUnits; |
| 152 | } |
| 153 | |
| 154 | bool SVGLength::operator!=(const SVGLength& other) const |
| 155 | { |
| 156 | return !operator==(other); |
| 157 | } |
| 158 | |
| 159 | SVGLength SVGLength::construct(SVGLengthMode mode, const String& valueAsString, SVGParsingError& parseError, SVGLengthNegativeValuesMode negativeValuesMode) |
| 160 | { |
| 161 | ExceptionCode ec = 0; |
| 162 | SVGLength length(mode); |
| 163 | |
| 164 | length.setValueAsString(valueAsString, ec); |
| 165 | |
| 166 | if (ec) |
| 167 | parseError = ParsingAttributeFailedError; |
| 168 | else if (negativeValuesMode == ForbidNegativeLengths && length.valueInSpecifiedUnits() < 0) |
| 169 | parseError = NegativeValueForbiddenError; |
| 170 | |
| 171 | return length; |
| 172 | } |
| 173 | |
| 174 | SVGLengthType SVGLength::unitType() const |
| 175 | { |
| 176 | return extractType(m_unit); |
| 177 | } |
| 178 | |
| 179 | SVGLengthMode SVGLength::unitMode() const |
| 180 | { |
| 181 | return extractMode(m_unit); |
| 182 | } |
| 183 | |
| 184 | float SVGLength::value(const SVGLengthContext& context) const |
| 185 | { |
| 186 | return value(context, IGNORE_EXCEPTION); |
| 187 | } |
| 188 | |
| 189 | float SVGLength::value(const SVGLengthContext& context, ExceptionCode& ec) const |
| 190 | { |
| 191 | return context.convertValueToUserUnits(m_valueInSpecifiedUnits, extractMode(m_unit), extractType(m_unit), ec); |
| 192 | } |
| 193 | |
| 194 | void SVGLength::setValue(const SVGLengthContext& context, float value, SVGLengthMode mode, SVGLengthType unitType, ExceptionCode& ec) |
| 195 | { |
| 196 | m_unit = storeUnit(mode, unitType); |
| 197 | setValue(value, context, ec); |
| 198 | } |
| 199 | |
| 200 | void SVGLength::setValue(float value, const SVGLengthContext& context, ExceptionCode& ec) |
| 201 | { |
| 202 | // 100% = 100.0 instead of 1.0 for historical reasons, this could eventually be changed |
| 203 | if (extractType(m_unit) == LengthTypePercentage) |
| 204 | value = value / 100; |
| 205 | |
| 206 | ec = 0; |
| 207 | float convertedValue = context.convertValueFromUserUnits(value, extractMode(m_unit), extractType(m_unit), ec); |
| 208 | if (!ec) |
| 209 | m_valueInSpecifiedUnits = convertedValue; |
| 210 | } |
| 211 | float SVGLength::valueAsPercentage() const |
| 212 | { |
| 213 | // 100% = 100.0 instead of 1.0 for historical reasons, this could eventually be changed |
| 214 | if (extractType(m_unit) == LengthTypePercentage) |
| 215 | return m_valueInSpecifiedUnits / 100; |
| 216 | |
| 217 | return m_valueInSpecifiedUnits; |
| 218 | } |
| 219 | |
| 220 | void SVGLength::setValueAsString(const String& string, ExceptionCode& ec) |
| 221 | { |
| 222 | if (string.isEmpty()) |
| 223 | return; |
| 224 | |
| 225 | float convertedNumber = 0; |
| 226 | const UChar* ptr = string.characters(); |
| 227 | const UChar* end = ptr + string.length(); |
| 228 | |
| 229 | if (!parseNumber(ptr, end, convertedNumber, false)) { |
| 230 | ec = SYNTAX_ERR; |
| 231 | return; |
| 232 | } |
| 233 | |
| 234 | SVGLengthType type = stringToLengthType(ptr, end); |
| 235 | ASSERT(ptr <= end); |
| 236 | if (type == LengthTypeUnknown) { |
| 237 | ec = SYNTAX_ERR; |
| 238 | return; |
| 239 | } |
| 240 | |
| 241 | m_unit = storeUnit(extractMode(m_unit), type); |
| 242 | m_valueInSpecifiedUnits = convertedNumber; |
| 243 | } |
| 244 | |
| 245 | String SVGLength::valueAsString() const |
| 246 | { |
| 247 | return String::number(m_valueInSpecifiedUnits) + lengthTypeToString(extractType(m_unit)); |
| 248 | } |
| 249 | |
| 250 | void SVGLength::newValueSpecifiedUnits(unsigned short type, float value, ExceptionCode& ec) |
| 251 | { |
| 252 | if (type == LengthTypeUnknown || type > LengthTypePC) { |
| 253 | ec = NOT_SUPPORTED_ERR; |
| 254 | return; |
| 255 | } |
| 256 | |
| 257 | m_unit = storeUnit(extractMode(m_unit), static_cast<SVGLengthType>(type)); |
| 258 | m_valueInSpecifiedUnits = value; |
| 259 | } |
| 260 | |
| 261 | void SVGLength::convertToSpecifiedUnits(unsigned short type, const SVGLengthContext& context, ExceptionCode& ec) |
| 262 | { |
| 263 | if (type == LengthTypeUnknown || type > LengthTypePC) { |
| 264 | ec = NOT_SUPPORTED_ERR; |
| 265 | return; |
| 266 | } |
| 267 | |
| 268 | float valueInUserUnits = value(context, ec); |
| 269 | if (ec) |
| 270 | return; |
| 271 | |
| 272 | unsigned int originalUnitAndType = m_unit; |
| 273 | m_unit = storeUnit(extractMode(m_unit), static_cast<SVGLengthType>(type)); |
| 274 | setValue(valueInUserUnits, context, ec); |
| 275 | if (!ec) |
| 276 | return; |
| 277 | |
| 278 | // Eventually restore old unit and type |
| 279 | m_unit = originalUnitAndType; |
| 280 | } |
| 281 | |
| 282 | SVGLength SVGLength::fromCSSPrimitiveValue(CSSPrimitiveValue* value) |
| 283 | { |
| 284 | ASSERT(value); |
| 285 | |
| 286 | SVGLengthType svgType; |
| 287 | switch (value->primitiveType()) { |
| 288 | case CSSPrimitiveValue::CSS_NUMBER: |
| 289 | svgType = LengthTypeNumber; |
| 290 | break; |
| 291 | case CSSPrimitiveValue::CSS_PERCENTAGE: |
| 292 | svgType = LengthTypePercentage; |
| 293 | break; |
| 294 | case CSSPrimitiveValue::CSS_EMS: |
| 295 | svgType = LengthTypeEMS; |
| 296 | break; |
| 297 | case CSSPrimitiveValue::CSS_EXS: |
| 298 | svgType = LengthTypeEXS; |
| 299 | break; |
| 300 | case CSSPrimitiveValue::CSS_PX: |
| 301 | svgType = LengthTypePX; |
| 302 | break; |
| 303 | case CSSPrimitiveValue::CSS_CM: |
| 304 | svgType = LengthTypeCM; |
| 305 | break; |
| 306 | case CSSPrimitiveValue::CSS_MM: |
| 307 | svgType = LengthTypeMM; |
| 308 | break; |
| 309 | case CSSPrimitiveValue::CSS_IN: |
| 310 | svgType = LengthTypeIN; |
| 311 | break; |
| 312 | case CSSPrimitiveValue::CSS_PT: |
| 313 | svgType = LengthTypePT; |
| 314 | break; |
| 315 | case CSSPrimitiveValue::CSS_PC: |
| 316 | svgType = LengthTypePC; |
| 317 | break; |
| 318 | case CSSPrimitiveValue::CSS_UNKNOWN: |
| 319 | default: |
| 320 | svgType = LengthTypeUnknown; |
| 321 | break; |
| 322 | }; |
| 323 | |
| 324 | if (svgType == LengthTypeUnknown) |
| 325 | return SVGLength(); |
| 326 | |
| 327 | ExceptionCode ec = 0; |
| 328 | SVGLength length; |
| 329 | length.newValueSpecifiedUnits(svgType, value->getFloatValue(), ec); |
| 330 | if (ec) |
| 331 | return SVGLength(); |
| 332 | |
| 333 | return length; |
| 334 | } |
| 335 | |
| 336 | PassRefPtr<CSSPrimitiveValue> SVGLength::toCSSPrimitiveValue(const SVGLength& length) |
| 337 | { |
| 338 | CSSPrimitiveValue::UnitTypes cssType = CSSPrimitiveValue::CSS_UNKNOWN; |
| 339 | switch (length.unitType()) { |
| 340 | case LengthTypeUnknown: |
| 341 | break; |
| 342 | case LengthTypeNumber: |
| 343 | cssType = CSSPrimitiveValue::CSS_NUMBER; |
| 344 | break; |
| 345 | case LengthTypePercentage: |
| 346 | cssType = CSSPrimitiveValue::CSS_PERCENTAGE; |
| 347 | break; |
| 348 | case LengthTypeEMS: |
| 349 | cssType = CSSPrimitiveValue::CSS_EMS; |
| 350 | break; |
| 351 | case LengthTypeEXS: |
| 352 | cssType = CSSPrimitiveValue::CSS_EXS; |
| 353 | break; |
| 354 | case LengthTypePX: |
| 355 | cssType = CSSPrimitiveValue::CSS_PX; |
| 356 | break; |
| 357 | case LengthTypeCM: |
| 358 | cssType = CSSPrimitiveValue::CSS_CM; |
| 359 | break; |
| 360 | case LengthTypeMM: |
| 361 | cssType = CSSPrimitiveValue::CSS_MM; |
| 362 | break; |
| 363 | case LengthTypeIN: |
| 364 | cssType = CSSPrimitiveValue::CSS_IN; |
| 365 | break; |
| 366 | case LengthTypePT: |
| 367 | cssType = CSSPrimitiveValue::CSS_PT; |
| 368 | break; |
| 369 | case LengthTypePC: |
| 370 | cssType = CSSPrimitiveValue::CSS_PC; |
| 371 | break; |
| 372 | }; |
| 373 | |
| 374 | return CSSPrimitiveValue::create(length.valueInSpecifiedUnits(), cssType); |
| 375 | } |
| 376 | |
| 377 | SVGLengthMode SVGLength::lengthModeForAnimatedLengthAttribute(const QualifiedName& attrName) |
| 378 | { |
| 379 | typedef HashMap<QualifiedName, SVGLengthMode> LengthModeForLengthAttributeMap; |
| 380 | DEFINE_STATIC_LOCAL(LengthModeForLengthAttributeMap, s_lengthModeMap, ()); |
| 381 | |
| 382 | if (s_lengthModeMap.isEmpty()) { |
| 383 | s_lengthModeMap.set(SVGNames::xAttr, LengthModeWidth); |
| 384 | s_lengthModeMap.set(SVGNames::yAttr, LengthModeHeight); |
| 385 | s_lengthModeMap.set(SVGNames::cxAttr, LengthModeWidth); |
| 386 | s_lengthModeMap.set(SVGNames::cyAttr, LengthModeHeight); |
| 387 | s_lengthModeMap.set(SVGNames::dxAttr, LengthModeWidth); |
| 388 | s_lengthModeMap.set(SVGNames::dyAttr, LengthModeHeight); |
| 389 | s_lengthModeMap.set(SVGNames::fxAttr, LengthModeWidth); |
| 390 | s_lengthModeMap.set(SVGNames::fyAttr, LengthModeHeight); |
| 391 | s_lengthModeMap.set(SVGNames::rAttr, LengthModeOther); |
| 392 | s_lengthModeMap.set(SVGNames::widthAttr, LengthModeWidth); |
| 393 | s_lengthModeMap.set(SVGNames::heightAttr, LengthModeHeight); |
| 394 | s_lengthModeMap.set(SVGNames::x1Attr, LengthModeWidth); |
| 395 | s_lengthModeMap.set(SVGNames::x2Attr, LengthModeWidth); |
| 396 | s_lengthModeMap.set(SVGNames::y1Attr, LengthModeHeight); |
| 397 | s_lengthModeMap.set(SVGNames::y2Attr, LengthModeHeight); |
| 398 | s_lengthModeMap.set(SVGNames::refXAttr, LengthModeWidth); |
| 399 | s_lengthModeMap.set(SVGNames::refYAttr, LengthModeHeight); |
| 400 | s_lengthModeMap.set(SVGNames::markerWidthAttr, LengthModeWidth); |
| 401 | s_lengthModeMap.set(SVGNames::markerHeightAttr, LengthModeHeight); |
| 402 | s_lengthModeMap.set(SVGNames::textLengthAttr, LengthModeWidth); |
| 403 | s_lengthModeMap.set(SVGNames::startOffsetAttr, LengthModeWidth); |
| 404 | } |
| 405 | |
| 406 | if (s_lengthModeMap.contains(attrName)) |
| 407 | return s_lengthModeMap.get(attrName); |
| 408 | |
| 409 | return LengthModeOther; |
| 410 | } |
| 411 | |
| 412 | } |