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/*
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 "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)
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