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/*
* Copyright (C) 2004, 2005 Nikolas Zimmermann <zimmermann@kde.org>
* Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>
* Copyright (C) 2007 Eric Seidel <eric@webkit.org>
* Copyright (C) 2008 Apple Inc. All rights reserved.
*
* 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) && ENABLE(SVG_ANIMATION)
#include "SVGAnimateTransformElement.h"
#include "AffineTransform.h"
#include "Attribute.h"
#include "RenderObject.h"
#include "RenderSVGResource.h"
#include "SVGAngle.h"
#include "SVGElementInstance.h"
#include "SVGGradientElement.h"
#include "SVGNames.h"
#include "SVGParserUtilities.h"
#include "SVGSVGElement.h"
#include "SVGStyledTransformableElement.h"
#include "SVGTextElement.h"
#include "SVGTransform.h"
#include "SVGTransformList.h"
#include "SVGUseElement.h"
#include <math.h>
#include <wtf/MathExtras.h>
using namespace std;
namespace WebCore {
inline SVGAnimateTransformElement::SVGAnimateTransformElement(const QualifiedName& tagName, Document* document)
: SVGAnimationElement(tagName, document)
, m_type(SVGTransform::SVG_TRANSFORM_UNKNOWN)
, m_baseIndexInTransformList(0)
{
}
PassRefPtr<SVGAnimateTransformElement> SVGAnimateTransformElement::create(const QualifiedName& tagName, Document* document)
{
return adoptRef(new SVGAnimateTransformElement(tagName, document));
}
bool SVGAnimateTransformElement::hasValidAttributeType() const
{
SVGElement* targetElement = this->targetElement();
if (!targetElement)
return false;
return determineAnimatedAttributeType(targetElement) == AnimatedTransformList;
}
AnimatedAttributeType SVGAnimateTransformElement::determineAnimatedAttributeType(SVGElement* targetElement) const
{
ASSERT(targetElement);
// Just transform lists can be animated with <animateTransform>
// http://www.w3.org/TR/SVG/animate.html#AnimationAttributesAndProperties
if (targetElement->animatedPropertyTypeForAttribute(attributeName()) != AnimatedTransformList)
return AnimatedUnknown;
return AnimatedTransformList;
}
void SVGAnimateTransformElement::parseMappedAttribute(Attribute* attr)
{
if (attr->name() == SVGNames::typeAttr) {
if (attr->value() == "translate")
m_type = SVGTransform::SVG_TRANSFORM_TRANSLATE;
else if (attr->value() == "scale")
m_type = SVGTransform::SVG_TRANSFORM_SCALE;
else if (attr->value() == "rotate")
m_type = SVGTransform::SVG_TRANSFORM_ROTATE;
else if (attr->value() == "skewX")
m_type = SVGTransform::SVG_TRANSFORM_SKEWX;
else if (attr->value() == "skewY")
m_type = SVGTransform::SVG_TRANSFORM_SKEWY;
} else
SVGAnimationElement::parseMappedAttribute(attr);
}
static SVGTransformList* transformListFor(SVGElement* element)
{
ASSERT(element);
if (element->isStyledTransformable())
return &static_cast<SVGStyledTransformableElement*>(element)->transform();
if (element->hasTagName(SVGNames::textTag))
return &static_cast<SVGTextElement*>(element)->transform();
if (element->hasTagName(SVGNames::linearGradientTag) || element->hasTagName(SVGNames::radialGradientTag))
return &static_cast<SVGGradientElement*>(element)->gradientTransform();
// FIXME: Handle patternTransform, which is obviously missing!
return 0;
}
void SVGAnimateTransformElement::resetToBaseValue(const String& baseValue)
{
SVGElement* targetElement = this->targetElement();
if (!targetElement || determineAnimatedAttributeType(targetElement) == AnimatedUnknown)
return;
if (targetElement->hasTagName(SVGNames::linearGradientTag) || targetElement->hasTagName(SVGNames::radialGradientTag)) {
targetElement->setAttribute(SVGNames::gradientTransformAttr, baseValue.isEmpty() ? "matrix(1 0 0 1 0 0)" : baseValue);
return;
}
if (baseValue.isEmpty()) {
if (SVGTransformList* list = transformListFor(targetElement))
list->clear();
} else
targetElement->setAttribute(SVGNames::transformAttr, baseValue);
}
void SVGAnimateTransformElement::calculateAnimatedValue(float percentage, unsigned repeat, SVGSMILElement*)
{
SVGElement* targetElement = this->targetElement();
if (!targetElement || determineAnimatedAttributeType(targetElement) == AnimatedUnknown)
return;
SVGTransformList* transformList = transformListFor(targetElement);
ASSERT(transformList);
if (!isAdditive())
transformList->clear();
if (isAccumulated() && repeat) {
SVGTransform accumulatedTransform = SVGTransformDistance(m_fromTransform, m_toTransform).scaledDistance(repeat).addToSVGTransform(SVGTransform());
transformList->append(accumulatedTransform);
}
SVGTransform transform = SVGTransformDistance(m_fromTransform, m_toTransform).scaledDistance(percentage).addToSVGTransform(m_fromTransform);
transformList->append(transform);
}
bool SVGAnimateTransformElement::calculateFromAndToValues(const String& fromString, const String& toString)
{
m_fromTransform = parseTransformValue(fromString);
if (!m_fromTransform.isValid())
return false;
m_toTransform = parseTransformValue(toString);
return m_toTransform.isValid();
}
bool SVGAnimateTransformElement::calculateFromAndByValues(const String& fromString, const String& byString)
{
m_fromTransform = parseTransformValue(fromString);
if (!m_fromTransform.isValid())
return false;
m_toTransform = SVGTransformDistance::addSVGTransforms(m_fromTransform, parseTransformValue(byString));
return m_toTransform.isValid();
}
SVGTransform SVGAnimateTransformElement::parseTransformValue(const String& value) const
{
if (value.isEmpty())
return SVGTransform(m_type);
SVGTransform result;
// FIXME: This is pretty dumb but parseTransformValue() wants those parenthesis.
String parseString("(" + value + ")");
const UChar* ptr = parseString.characters();
SVGTransformable::parseTransformValue(m_type, ptr, ptr + parseString.length(), result); // ignoring return value
return result;
}
void SVGAnimateTransformElement::applyResultsToTarget()
{
SVGElement* targetElement = this->targetElement();
if (!targetElement || determineAnimatedAttributeType(targetElement) == AnimatedUnknown)
return;
// We accumulate to the target element transform list so there is not much to do here.
if (RenderObject* renderer = targetElement->renderer()) {
renderer->setNeedsTransformUpdate();
RenderSVGResource::markForLayoutAndParentResourceInvalidation(renderer);
}
// ...except in case where we have additional instances in <use> trees.
SVGTransformList* transformList = transformListFor(targetElement);
if (!transformList)
return;
const HashSet<SVGElementInstance*>& instances = targetElement->instancesForElement();
const HashSet<SVGElementInstance*>::const_iterator end = instances.end();
for (HashSet<SVGElementInstance*>::const_iterator it = instances.begin(); it != end; ++it) {
SVGElement* shadowTreeElement = (*it)->shadowTreeElement();
ASSERT(shadowTreeElement);
if (shadowTreeElement->isStyledTransformable())
static_cast<SVGStyledTransformableElement*>(shadowTreeElement)->setTransformBaseValue(*transformList);
else if (shadowTreeElement->hasTagName(SVGNames::textTag))
static_cast<SVGTextElement*>(shadowTreeElement)->setTransformBaseValue(*transformList);
else if (shadowTreeElement->hasTagName(SVGNames::linearGradientTag) || shadowTreeElement->hasTagName(SVGNames::radialGradientTag))
static_cast<SVGGradientElement*>(shadowTreeElement)->setGradientTransformBaseValue(*transformList);
// FIXME: Handle patternTransform, obviously missing!
if (RenderObject* renderer = shadowTreeElement->renderer()) {
renderer->setNeedsTransformUpdate();
RenderSVGResource::markForLayoutAndParentResourceInvalidation(renderer);
}
}
}
float SVGAnimateTransformElement::calculateDistance(const String& fromString, const String& toString)
{
// FIXME: This is not correct in all cases. The spec demands that each component (translate x and y for example)
// is paced separately. To implement this we need to treat each component as individual animation everywhere.
SVGTransform from = parseTransformValue(fromString);
if (!from.isValid())
return -1;
SVGTransform to = parseTransformValue(toString);
if (!to.isValid() || from.type() != to.type())
return -1;
if (to.type() == SVGTransform::SVG_TRANSFORM_TRANSLATE) {
FloatSize diff = to.translate() - from.translate();
return sqrtf(diff.width() * diff.width() + diff.height() * diff.height());
}
if (to.type() == SVGTransform::SVG_TRANSFORM_ROTATE)
return fabsf(to.angle() - from.angle());
if (to.type() == SVGTransform::SVG_TRANSFORM_SCALE) {
FloatSize diff = to.scale() - from.scale();
return sqrtf(diff.width() * diff.width() + diff.height() * diff.height());
}
return -1;
}
}
#endif // ENABLE(SVG)
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