/* Copyright (C) 2004, 2005 Nikolas Zimmermann 2004, 2005, 2006 Rob Buis Copyright (C) 2008 Apple Inc. All rights reserved. This file is part of the KDE 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) && ENABLE(SVG_ANIMATION) #include "SVGAnimateElement.h" #include "ColorDistance.h" #include "FloatConversion.h" #include "SVGColor.h" #include "SVGParserUtilities.h" #include "SVGPathSegList.h" #include using namespace std; namespace WebCore { SVGAnimateElement::SVGAnimateElement(const QualifiedName& tagName, Document* doc) : SVGAnimationElement(tagName, doc) , m_propertyType(StringProperty) , m_fromNumber(0) , m_toNumber(0) , m_animatedNumber(numeric_limits::infinity()) { } SVGAnimateElement::~SVGAnimateElement() { } static bool parseNumberValueAndUnit(const String& in, double& value, String& unit) { // FIXME: These are from top of my head, figure out all property types that can be animated as numbers. unsigned unitLength = 0; String parse = in.stripWhiteSpace(); if (parse.endsWith("%")) unitLength = 1; else if (parse.endsWith("px") || parse.endsWith("pt") || parse.endsWith("em")) unitLength = 2; else if (parse.endsWith("deg") || parse.endsWith("rad")) unitLength = 3; else if (parse.endsWith("grad")) unitLength = 4; String newUnit = parse.right(unitLength); String number = parse.left(parse.length() - unitLength); if (!unit.isEmpty() && newUnit != unit || number.isEmpty()) return false; UChar last = number[number.length() - 1]; if (last < '0' || last > '9') return false; unit = newUnit; bool ok; value = number.toDouble(&ok); return ok; } SVGAnimateElement::PropertyType SVGAnimateElement::determinePropertyType(const String& attribute) const { // FIXME: We need a full property table for figuring this out reliably. if (hasTagName(SVGNames::animateColorTag)) return ColorProperty; if (attribute == "d") return PathProperty; if (attribute == "color" || attribute == "fill" || attribute == "stroke") return ColorProperty; return NumberProperty; } void SVGAnimateElement::calculateAnimatedValue(float percentage, unsigned repeat, SVGSMILElement* resultElement) { ASSERT(percentage >= 0.f && percentage <= 1.f); ASSERT(resultElement); if (hasTagName(SVGNames::setTag)) percentage = 1.f; if (!resultElement->hasTagName(SVGNames::animateTag) && !resultElement->hasTagName(SVGNames::animateColorTag) && !resultElement->hasTagName(SVGNames::setTag)) return; SVGAnimateElement* results = static_cast(resultElement); // Can't accumulate over a string property. if (results->m_propertyType == StringProperty && m_propertyType != StringProperty) return; if (m_propertyType == NumberProperty) { // To animation uses contributions from the lower priority animations as the base value. if (animationMode() == ToAnimation) m_fromNumber = results->m_animatedNumber; double number = (m_toNumber - m_fromNumber) * percentage + m_fromNumber; // FIXME: This is not correct for values animation. if (isAccumulated() && repeat) number += m_toNumber * repeat; if (isAdditive() && animationMode() != ToAnimation) results->m_animatedNumber += number; else results->m_animatedNumber = number; return; } if (m_propertyType == ColorProperty) { if (animationMode() == ToAnimation) m_fromColor = results->m_animatedColor; Color color = ColorDistance(m_fromColor, m_toColor).scaledDistance(percentage).addToColorAndClamp(m_fromColor); // FIXME: Accumulate colors. if (isAdditive() && animationMode() != ToAnimation) results->m_animatedColor = ColorDistance::addColorsAndClamp(results->m_animatedColor, color); else results->m_animatedColor = color; return; } AnimationMode animationMode = this->animationMode(); if (m_propertyType == PathProperty) { if (percentage == 0) results->m_animatedPath = m_fromPath; else if (percentage == 1.f) results->m_animatedPath = m_toPath; else { if (m_fromPath && m_toPath) results->m_animatedPath = SVGPathSegList::createAnimated(m_fromPath.get(), m_toPath.get(), percentage); else results->m_animatedPath.clear(); // Fall back to discrete animation if the paths are not compatible if (!results->m_animatedPath) results->m_animatedPath = ((animationMode == FromToAnimation && percentage > 0.5f) || animationMode == ToAnimation || percentage == 1.0f) ? m_toPath : m_fromPath; } return; } ASSERT(animationMode == FromToAnimation || animationMode == ToAnimation || animationMode == ValuesAnimation); if ((animationMode == FromToAnimation && percentage > 0.5f) || animationMode == ToAnimation || percentage == 1.0f) results->m_animatedString = m_toString; else results->m_animatedString = m_fromString; // Higher priority replace animation overrides any additive results so far. results->m_propertyType = StringProperty; } bool SVGAnimateElement::calculateFromAndToValues(const String& fromString, const String& toString) { // FIXME: Needs more solid way determine target attribute type. m_propertyType = determinePropertyType(attributeName()); if (m_propertyType == ColorProperty) { m_fromColor = SVGColor::colorFromRGBColorString(fromString); m_toColor = SVGColor::colorFromRGBColorString(toString); if (m_fromColor.isValid() && m_toColor.isValid()) return true; } else if (m_propertyType == NumberProperty) { m_numberUnit = String(); if (parseNumberValueAndUnit(toString, m_toNumber, m_numberUnit)) { // For to-animations the from number is calculated later if (animationMode() == ToAnimation || parseNumberValueAndUnit(fromString, m_fromNumber, m_numberUnit)) return true; } } else if (m_propertyType == PathProperty) { m_fromPath = SVGPathSegList::create(SVGNames::dAttr); if (pathSegListFromSVGData(m_fromPath.get(), fromString)) { m_toPath = SVGPathSegList::create(SVGNames::dAttr); if (pathSegListFromSVGData(m_toPath.get(), toString)) return true; } m_fromPath.clear(); m_toPath.clear(); } m_fromString = fromString; m_toString = toString; m_propertyType = StringProperty; return true; } bool SVGAnimateElement::calculateFromAndByValues(const String& fromString, const String& byString) { ASSERT(!hasTagName(SVGNames::setTag)); m_propertyType = determinePropertyType(attributeName()); if (m_propertyType == ColorProperty) { m_fromColor = fromString.isEmpty() ? Color() : SVGColor::colorFromRGBColorString(fromString); m_toColor = ColorDistance::addColorsAndClamp(m_fromColor, SVGColor::colorFromRGBColorString(byString)); if (!m_fromColor.isValid() || !m_toColor.isValid()) return false; } else { m_numberUnit = String(); m_fromNumber = 0; if (!fromString.isEmpty() && !parseNumberValueAndUnit(fromString, m_fromNumber, m_numberUnit)) return false; if (!parseNumberValueAndUnit(byString, m_toNumber, m_numberUnit)) return false; m_toNumber += m_fromNumber; } return true; } void SVGAnimateElement::resetToBaseValue(const String& baseString) { m_animatedString = baseString; m_propertyType = determinePropertyType(attributeName()); if (m_propertyType == ColorProperty) { m_animatedColor = baseString.isEmpty() ? Color() : SVGColor::colorFromRGBColorString(baseString); if (m_animatedColor.isValid()) return; } else if (m_propertyType == NumberProperty) { if (baseString.isEmpty()) { m_animatedNumber = 0; m_numberUnit = String(); return; } if (parseNumberValueAndUnit(baseString, m_animatedNumber, m_numberUnit)) return; } else if (m_propertyType == PathProperty) { m_animatedPath.clear(); return; } m_propertyType = StringProperty; } void SVGAnimateElement::applyResultsToTarget() { String valueToApply; if (m_propertyType == ColorProperty) valueToApply = m_animatedColor.name(); else if (m_propertyType == NumberProperty) valueToApply = String::number(m_animatedNumber) + m_numberUnit; else if (m_propertyType == PathProperty) { if (!m_animatedPath || !m_animatedPath->numberOfItems()) valueToApply = m_animatedString; else { // We need to keep going to string and back because we are currently only able to paint // "processed" paths where complex shapes are replaced with simpler ones. Path // morphing needs to be done with unprocessed paths. // FIXME: This could be optimized if paths were not processed at parse time. unsigned itemCount = m_animatedPath->numberOfItems(); ExceptionCode ec; for (unsigned n = 0; n < itemCount; ++n) { RefPtr segment = m_animatedPath->getItem(n, ec); valueToApply.append(segment->toString() + " "); } } } else valueToApply = m_animatedString; setTargetAttributeAnimatedValue(valueToApply); } float SVGAnimateElement::calculateDistance(const String& fromString, const String& toString) { m_propertyType = determinePropertyType(attributeName()); if (m_propertyType == NumberProperty) { double from; double to; String unit; if (!parseNumberValueAndUnit(fromString, from, unit)) return -1.f; if (!parseNumberValueAndUnit(toString, to, unit)) return -1.f; return narrowPrecisionToFloat(fabs(to - from)); } else if (m_propertyType == ColorProperty) { Color from = SVGColor::colorFromRGBColorString(fromString); if (!from.isValid()) return -1.f; Color to = SVGColor::colorFromRGBColorString(toString); if (!to.isValid()) return -1.f; return ColorDistance(from, to).distance(); } return -1.f; } } // vim:ts=4:noet #endif // ENABLE(SVG)