| /* |
| * Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann@kde.org> |
| * Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org> |
| * Copyright (C) 2007 Eric Seidel <eric@webkit.org> |
| * |
| * 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" |
| #include "SVGTransformable.h" |
| |
| #include "AffineTransform.h" |
| #include "FloatConversion.h" |
| #include "SVGElement.h" |
| #include "SVGNames.h" |
| #include "SVGParserUtilities.h" |
| #include "SVGTransformListValues.h" |
| #include <wtf/text/StringView.h> |
| |
| namespace WebCore { |
| |
| static int parseTransformParamList(const UChar*& ptr, const UChar* end, float* values, int required, int optional) |
| { |
| int optionalParams = 0, requiredParams = 0; |
| |
| if (!skipOptionalSVGSpaces(ptr, end) || *ptr != '(') |
| return -1; |
| |
| ptr++; |
| |
| skipOptionalSVGSpaces(ptr, end); |
| |
| while (requiredParams < required) { |
| if (ptr >= end || !parseNumber(ptr, end, values[requiredParams], false)) |
| return -1; |
| requiredParams++; |
| if (requiredParams < required) |
| skipOptionalSVGSpacesOrDelimiter(ptr, end); |
| } |
| if (!skipOptionalSVGSpaces(ptr, end)) |
| return -1; |
| |
| bool delimParsed = skipOptionalSVGSpacesOrDelimiter(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) |
| skipOptionalSVGSpacesOrDelimiter(ptr, end); |
| } |
| |
| if (!skipOptionalSVGSpaces(ptr, end)) |
| return -1; |
| |
| delimParsed = skipOptionalSVGSpacesOrDelimiter(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}; |
| |
| // This destructor is needed in order to link correctly with Intel ICC. |
| SVGTransformable::~SVGTransformable() = default; |
| |
| bool SVGTransformable::parseTransformValue(SVGTransformValue::SVGTransformType type, const UChar*& ptr, const UChar* end, SVGTransformValue& transform) |
| { |
| if (type == SVGTransformValue::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 SVGTransformValue::SVG_TRANSFORM_UNKNOWN: |
| ASSERT_NOT_REACHED(); |
| break; |
| case SVGTransformValue::SVG_TRANSFORM_SKEWX: |
| transform.setSkewX(values[0]); |
| break; |
| case SVGTransformValue::SVG_TRANSFORM_SKEWY: |
| transform.setSkewY(values[0]); |
| break; |
| case SVGTransformValue::SVG_TRANSFORM_SCALE: |
| if (valueCount == 1) // Spec: if only one param given, assume uniform scaling |
| transform.setScale(values[0], values[0]); |
| else |
| transform.setScale(values[0], values[1]); |
| break; |
| case SVGTransformValue::SVG_TRANSFORM_TRANSLATE: |
| if (valueCount == 1) // Spec: if only one param given, assume 2nd param to be 0 |
| transform.setTranslate(values[0], 0); |
| else |
| transform.setTranslate(values[0], values[1]); |
| break; |
| case SVGTransformValue::SVG_TRANSFORM_ROTATE: |
| if (valueCount == 1) |
| transform.setRotate(values[0], 0, 0); |
| else |
| transform.setRotate(values[0], values[1], values[2]); |
| break; |
| case SVGTransformValue::SVG_TRANSFORM_MATRIX: |
| transform.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, SVGTransformValue::SVGTransformType& type) |
| { |
| if (currTransform >= end) |
| return false; |
| |
| if (*currTransform == 's') { |
| if (skipString(currTransform, end, skewXDesc, WTF_ARRAY_LENGTH(skewXDesc))) |
| type = SVGTransformValue::SVG_TRANSFORM_SKEWX; |
| else if (skipString(currTransform, end, skewYDesc, WTF_ARRAY_LENGTH(skewYDesc))) |
| type = SVGTransformValue::SVG_TRANSFORM_SKEWY; |
| else if (skipString(currTransform, end, scaleDesc, WTF_ARRAY_LENGTH(scaleDesc))) |
| type = SVGTransformValue::SVG_TRANSFORM_SCALE; |
| else |
| return false; |
| } else if (skipString(currTransform, end, translateDesc, WTF_ARRAY_LENGTH(translateDesc))) |
| type = SVGTransformValue::SVG_TRANSFORM_TRANSLATE; |
| else if (skipString(currTransform, end, rotateDesc, WTF_ARRAY_LENGTH(rotateDesc))) |
| type = SVGTransformValue::SVG_TRANSFORM_ROTATE; |
| else if (skipString(currTransform, end, matrixDesc, WTF_ARRAY_LENGTH(matrixDesc))) |
| type = SVGTransformValue::SVG_TRANSFORM_MATRIX; |
| else |
| return false; |
| |
| return true; |
| } |
| |
| SVGTransformValue::SVGTransformType SVGTransformable::parseTransformType(const String& typeString) |
| { |
| SVGTransformValue::SVGTransformType type = SVGTransformValue::SVG_TRANSFORM_UNKNOWN; |
| auto upconvertedCharacters = StringView(typeString).upconvertedCharacters(); |
| const UChar* characters = upconvertedCharacters; |
| parseAndSkipType(characters, characters + typeString.length(), type); |
| return type; |
| } |
| |
| bool SVGTransformable::parseTransformAttribute(SVGTransformListValues& list, const UChar*& currTransform, const UChar* end, TransformParsingMode mode) |
| { |
| if (mode == ClearList) |
| list.clear(); |
| |
| bool delimParsed = false; |
| while (currTransform < end) { |
| delimParsed = false; |
| SVGTransformValue::SVGTransformType type = SVGTransformValue::SVG_TRANSFORM_UNKNOWN; |
| skipOptionalSVGSpaces(currTransform, end); |
| |
| if (!parseAndSkipType(currTransform, end, type)) |
| return false; |
| |
| SVGTransformValue transform; |
| if (!parseTransformValue(type, currTransform, end, transform)) |
| return false; |
| |
| list.append(transform); |
| skipOptionalSVGSpaces(currTransform, end); |
| if (currTransform < end && *currTransform == ',') { |
| delimParsed = true; |
| ++currTransform; |
| } |
| skipOptionalSVGSpaces(currTransform, end); |
| } |
| |
| return !delimParsed; |
| } |
| |
| } |
