/* 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 "TransformationMatrix.h" #include "FloatConversion.h" #include "SVGNames.h" #include "SVGParserUtilities.h" #include "SVGStyledElement.h" #include "SVGTransformList.h" namespace WebCore { SVGTransformable::SVGTransformable() : SVGLocatable() { } SVGTransformable::~SVGTransformable() { } TransformationMatrix SVGTransformable::getCTM(const SVGElement* element) const { TransformationMatrix ctm = SVGLocatable::getCTM(element); return animatedLocalTransform() * ctm; } TransformationMatrix SVGTransformable::getScreenCTM(const SVGElement* element) const { TransformationMatrix ctm = SVGLocatable::getScreenCTM(element); return animatedLocalTransform() * ctm; } 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(TransformationMatrix(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(); const UChar* end = start + transform.length(); return parseTransformAttribute(list, start, end); } bool SVGTransformable::parseTransformAttribute(SVGTransformList* list, const UChar*& currTransform, const UChar* end) { 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; ExceptionCode ec = 0; 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)