| /* |
| Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann@kde.org> |
| 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org> |
| 2007 Eric Seidel <eric@webkit.org> |
| |
| 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 "RegularExpression.h" |
| #include "SVGNames.h" |
| #include "SVGParserUtilities.h" |
| #include "SVGStyledElement.h" |
| #include "SVGTransformList.h" |
| |
| namespace WebCore { |
| |
| SVGTransformable::SVGTransformable() : SVGLocatable() |
| { |
| } |
| |
| SVGTransformable::~SVGTransformable() |
| { |
| } |
| |
| AffineTransform SVGTransformable::getCTM(const SVGElement* element) const |
| { |
| AffineTransform ctm = SVGLocatable::getCTM(element); |
| return animatedLocalTransform() * ctm; |
| } |
| |
| AffineTransform SVGTransformable::getScreenCTM(const SVGElement* element) const |
| { |
| AffineTransform ctm = SVGLocatable::getScreenCTM(element); |
| return animatedLocalTransform() * ctm; |
| } |
| |
| 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(); |
| 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) |
