diff -r 000000000000 -r 4f2f89ce4247 WebCore/svg/SVGTransformable.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/WebCore/svg/SVGTransformable.cpp Fri Sep 17 09:02:29 2010 +0300 @@ -0,0 +1,225 @@ +/* + Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann + 2004, 2005, 2006, 2007 Rob Buis + 2007 Eric Seidel + + This file is part of the WebKit project + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public + License as published by the Free Software Foundation; either + version 2 of the License, or (at your option) any later version. + + This library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public License + along with this library; see the file COPYING.LIB. If not, write to + the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, + Boston, MA 02110-1301, USA. +*/ + +#include "config.h" + +#if ENABLE(SVG) +#include "SVGTransformable.h" + +#include "AffineTransform.h" +#include "FloatConversion.h" +#include "SVGNames.h" +#include "SVGParserUtilities.h" +#include "SVGStyledElement.h" +#include "SVGTransformList.h" + +namespace WebCore { + +SVGTransformable::SVGTransformable() + : SVGLocatable() +{ +} + +SVGTransformable::~SVGTransformable() +{ +} + +static int parseTransformParamList(const UChar*& ptr, const UChar* end, float* values, int required, int optional) +{ + int optionalParams = 0, requiredParams = 0; + + if (!skipOptionalSpaces(ptr, end) || *ptr != '(') + return -1; + + ptr++; + + skipOptionalSpaces(ptr, end); + + while (requiredParams < required) { + if (ptr >= end || !parseNumber(ptr, end, values[requiredParams], false)) + return -1; + requiredParams++; + if (requiredParams < required) + skipOptionalSpacesOrDelimiter(ptr, end); + } + if (!skipOptionalSpaces(ptr, end)) + return -1; + + bool delimParsed = skipOptionalSpacesOrDelimiter(ptr, end); + + if (ptr >= end) + return -1; + + if (*ptr == ')') { // skip optionals + ptr++; + if (delimParsed) + return -1; + } else { + while (optionalParams < optional) { + if (ptr >= end || !parseNumber(ptr, end, values[requiredParams + optionalParams], false)) + return -1; + optionalParams++; + if (optionalParams < optional) + skipOptionalSpacesOrDelimiter(ptr, end); + } + + if (!skipOptionalSpaces(ptr, end)) + return -1; + + delimParsed = skipOptionalSpacesOrDelimiter(ptr, end); + + if (ptr >= end || *ptr != ')' || delimParsed) + return -1; + ptr++; + } + + return requiredParams + optionalParams; +} + +// These should be kept in sync with enum SVGTransformType +static const int requiredValuesForType[] = {0, 6, 1, 1, 1, 1, 1}; +static const int optionalValuesForType[] = {0, 0, 1, 1, 2, 0, 0}; + +bool SVGTransformable::parseTransformValue(unsigned type, const UChar*& ptr, const UChar* end, SVGTransform& t) +{ + if (type == SVGTransform::SVG_TRANSFORM_UNKNOWN) + return false; + + int valueCount = 0; + float values[] = {0, 0, 0, 0, 0, 0}; + if ((valueCount = parseTransformParamList(ptr, end, values, requiredValuesForType[type], optionalValuesForType[type])) < 0) + return false; + + switch (type) { + case SVGTransform::SVG_TRANSFORM_SKEWX: + t.setSkewX(values[0]); + break; + case SVGTransform::SVG_TRANSFORM_SKEWY: + t.setSkewY(values[0]); + break; + case SVGTransform::SVG_TRANSFORM_SCALE: + if (valueCount == 1) // Spec: if only one param given, assume uniform scaling + t.setScale(values[0], values[0]); + else + t.setScale(values[0], values[1]); + break; + case SVGTransform::SVG_TRANSFORM_TRANSLATE: + if (valueCount == 1) // Spec: if only one param given, assume 2nd param to be 0 + t.setTranslate(values[0], 0); + else + t.setTranslate(values[0], values[1]); + break; + case SVGTransform::SVG_TRANSFORM_ROTATE: + if (valueCount == 1) + t.setRotate(values[0], 0, 0); + else + t.setRotate(values[0], values[1], values[2]); + break; + case SVGTransform::SVG_TRANSFORM_MATRIX: + t.setMatrix(AffineTransform(values[0], values[1], values[2], values[3], values[4], values[5])); + break; + } + + return true; +} + +static const UChar skewXDesc[] = {'s', 'k', 'e', 'w', 'X'}; +static const UChar skewYDesc[] = {'s', 'k', 'e', 'w', 'Y'}; +static const UChar scaleDesc[] = {'s', 'c', 'a', 'l', 'e'}; +static const UChar translateDesc[] = {'t', 'r', 'a', 'n', 's', 'l', 'a', 't', 'e'}; +static const UChar rotateDesc[] = {'r', 'o', 't', 'a', 't', 'e'}; +static const UChar matrixDesc[] = {'m', 'a', 't', 'r', 'i', 'x'}; + +static inline bool parseAndSkipType(const UChar*& currTransform, const UChar* end, unsigned short& type) +{ + if (currTransform >= end) + return false; + + if (*currTransform == 's') { + if (skipString(currTransform, end, skewXDesc, sizeof(skewXDesc) / sizeof(UChar))) + type = SVGTransform::SVG_TRANSFORM_SKEWX; + else if (skipString(currTransform, end, skewYDesc, sizeof(skewYDesc) / sizeof(UChar))) + type = SVGTransform::SVG_TRANSFORM_SKEWY; + else if (skipString(currTransform, end, scaleDesc, sizeof(scaleDesc) / sizeof(UChar))) + type = SVGTransform::SVG_TRANSFORM_SCALE; + else + return false; + } else if (skipString(currTransform, end, translateDesc, sizeof(translateDesc) / sizeof(UChar))) + type = SVGTransform::SVG_TRANSFORM_TRANSLATE; + else if (skipString(currTransform, end, rotateDesc, sizeof(rotateDesc) / sizeof(UChar))) + type = SVGTransform::SVG_TRANSFORM_ROTATE; + else if (skipString(currTransform, end, matrixDesc, sizeof(matrixDesc) / sizeof(UChar))) + type = SVGTransform::SVG_TRANSFORM_MATRIX; + else + return false; + + return true; +} + +bool SVGTransformable::parseTransformAttribute(SVGTransformList* list, const AtomicString& transform) +{ + const UChar* start = transform.characters(); + return parseTransformAttribute(list, start, start + transform.length()); +} + +bool SVGTransformable::parseTransformAttribute(SVGTransformList* list, const UChar*& currTransform, const UChar* end, TransformParsingMode mode) +{ + ExceptionCode ec = 0; + if (mode == ClearList) { + list->clear(ec); + ASSERT(!ec); + } + + bool delimParsed = false; + while (currTransform < end) { + delimParsed = false; + unsigned short type = SVGTransform::SVG_TRANSFORM_UNKNOWN; + skipOptionalSpaces(currTransform, end); + + if (!parseAndSkipType(currTransform, end, type)) + return false; + + SVGTransform t; + if (!parseTransformValue(type, currTransform, end, t)) + return false; + + list->appendItem(t, ec); + skipOptionalSpaces(currTransform, end); + if (currTransform < end && *currTransform == ',') { + delimParsed = true; + ++currTransform; + } + skipOptionalSpaces(currTransform, end); + } + + return !delimParsed; +} + +bool SVGTransformable::isKnownAttribute(const QualifiedName& attrName) +{ + return attrName == SVGNames::transformAttr; +} + +} + +#endif // ENABLE(SVG)