| /* |
| * Copyright (C) 2004, 2005, 2006, 2008 Nikolas Zimmermann <zimmermann@kde.org> |
| * Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org> |
| * Copyright (C) 2008 Eric Seidel <eric@webkit.org> |
| * Copyright (C) 2008 Dirk Schulze <krit@webkit.org> |
| * Copyright (C) Research In Motion Limited 2010. 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) |
| #include "SVGRadialGradientElement.h" |
| |
| #include "Attribute.h" |
| #include "FloatConversion.h" |
| #include "FloatPoint.h" |
| #include "RadialGradientAttributes.h" |
| #include "RenderSVGResourceRadialGradient.h" |
| #include "SVGNames.h" |
| #include "SVGStopElement.h" |
| #include "SVGTransform.h" |
| #include "SVGTransformList.h" |
| #include "SVGUnitTypes.h" |
| |
| namespace WebCore { |
| |
| // Animated property definitions |
| DEFINE_ANIMATED_LENGTH(SVGRadialGradientElement, SVGNames::cxAttr, Cx, cx) |
| DEFINE_ANIMATED_LENGTH(SVGRadialGradientElement, SVGNames::cyAttr, Cy, cy) |
| DEFINE_ANIMATED_LENGTH(SVGRadialGradientElement, SVGNames::rAttr, R, r) |
| DEFINE_ANIMATED_LENGTH(SVGRadialGradientElement, SVGNames::fxAttr, Fx, fx) |
| DEFINE_ANIMATED_LENGTH(SVGRadialGradientElement, SVGNames::fyAttr, Fy, fy) |
| |
| inline SVGRadialGradientElement::SVGRadialGradientElement(const QualifiedName& tagName, Document* document) |
| : SVGGradientElement(tagName, document) |
| , m_cx(LengthModeWidth, "50%") |
| , m_cy(LengthModeHeight, "50%") |
| , m_r(LengthModeOther, "50%") |
| , m_fx(LengthModeWidth) |
| , m_fy(LengthModeHeight) |
| { |
| // Spec: If the cx/cy/r attribute is not specified, the effect is as if a value of "50%" were specified. |
| } |
| |
| PassRefPtr<SVGRadialGradientElement> SVGRadialGradientElement::create(const QualifiedName& tagName, Document* document) |
| { |
| return adoptRef(new SVGRadialGradientElement(tagName, document)); |
| } |
| |
| void SVGRadialGradientElement::parseMappedAttribute(Attribute* attr) |
| { |
| if (attr->name() == SVGNames::cxAttr) |
| setCxBaseValue(SVGLength(LengthModeWidth, attr->value())); |
| else if (attr->name() == SVGNames::cyAttr) |
| setCyBaseValue(SVGLength(LengthModeHeight, attr->value())); |
| else if (attr->name() == SVGNames::rAttr) { |
| setRBaseValue(SVGLength(LengthModeOther, attr->value())); |
| if (rBaseValue().value(this) < 0.0) |
| document()->accessSVGExtensions()->reportError("A negative value for radial gradient radius <r> is not allowed"); |
| } else if (attr->name() == SVGNames::fxAttr) |
| setFxBaseValue(SVGLength(LengthModeWidth, attr->value())); |
| else if (attr->name() == SVGNames::fyAttr) |
| setFyBaseValue(SVGLength(LengthModeHeight, attr->value())); |
| else |
| SVGGradientElement::parseMappedAttribute(attr); |
| } |
| |
| void SVGRadialGradientElement::svgAttributeChanged(const QualifiedName& attrName) |
| { |
| SVGGradientElement::svgAttributeChanged(attrName); |
| |
| if (attrName == SVGNames::cxAttr |
| || attrName == SVGNames::cyAttr |
| || attrName == SVGNames::fxAttr |
| || attrName == SVGNames::fyAttr |
| || attrName == SVGNames::rAttr) { |
| updateRelativeLengthsInformation(); |
| |
| RenderObject* object = renderer(); |
| if (!object) |
| return; |
| |
| object->setNeedsLayout(true); |
| } |
| } |
| |
| void SVGRadialGradientElement::synchronizeProperty(const QualifiedName& attrName) |
| { |
| SVGGradientElement::synchronizeProperty(attrName); |
| |
| if (attrName == anyQName()) { |
| synchronizeCx(); |
| synchronizeCy(); |
| synchronizeFx(); |
| synchronizeFy(); |
| synchronizeR(); |
| return; |
| } |
| |
| if (attrName == SVGNames::cxAttr) |
| synchronizeCx(); |
| else if (attrName == SVGNames::cyAttr) |
| synchronizeCy(); |
| else if (attrName == SVGNames::fxAttr) |
| synchronizeFx(); |
| else if (attrName == SVGNames::fyAttr) |
| synchronizeFy(); |
| else if (attrName == SVGNames::rAttr) |
| synchronizeR(); |
| } |
| |
| AttributeToPropertyTypeMap& SVGRadialGradientElement::attributeToPropertyTypeMap() |
| { |
| DEFINE_STATIC_LOCAL(AttributeToPropertyTypeMap, s_attributeToPropertyTypeMap, ()); |
| return s_attributeToPropertyTypeMap; |
| } |
| |
| void SVGRadialGradientElement::fillAttributeToPropertyTypeMap() |
| { |
| AttributeToPropertyTypeMap& attributeToPropertyTypeMap = this->attributeToPropertyTypeMap(); |
| |
| SVGGradientElement::fillPassedAttributeToPropertyTypeMap(attributeToPropertyTypeMap); |
| attributeToPropertyTypeMap.set(SVGNames::cxAttr, AnimatedLength); |
| attributeToPropertyTypeMap.set(SVGNames::cyAttr, AnimatedLength); |
| attributeToPropertyTypeMap.set(SVGNames::rAttr, AnimatedLength); |
| attributeToPropertyTypeMap.set(SVGNames::fxAttr, AnimatedLength); |
| attributeToPropertyTypeMap.set(SVGNames::fyAttr, AnimatedLength); |
| } |
| |
| RenderObject* SVGRadialGradientElement::createRenderer(RenderArena* arena, RenderStyle*) |
| { |
| return new (arena) RenderSVGResourceRadialGradient(this); |
| } |
| |
| void SVGRadialGradientElement::collectGradientAttributes(RadialGradientAttributes& attributes) |
| { |
| HashSet<SVGGradientElement*> processedGradients; |
| |
| bool isRadial = true; |
| SVGGradientElement* current = this; |
| |
| while (current) { |
| if (!attributes.hasSpreadMethod() && current->hasAttribute(SVGNames::spreadMethodAttr)) |
| attributes.setSpreadMethod((GradientSpreadMethod) current->spreadMethod()); |
| |
| if (!attributes.hasBoundingBoxMode() && current->hasAttribute(SVGNames::gradientUnitsAttr)) |
| attributes.setBoundingBoxMode(current->gradientUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX); |
| |
| if (!attributes.hasGradientTransform() && current->hasAttribute(SVGNames::gradientTransformAttr)) { |
| AffineTransform transform; |
| current->gradientTransform().concatenate(transform); |
| attributes.setGradientTransform(transform); |
| } |
| |
| if (!attributes.hasStops()) { |
| const Vector<Gradient::ColorStop>& stops(current->buildStops()); |
| if (!stops.isEmpty()) |
| attributes.setStops(stops); |
| } |
| |
| if (isRadial) { |
| SVGRadialGradientElement* radial = static_cast<SVGRadialGradientElement*>(current); |
| |
| if (!attributes.hasCx() && current->hasAttribute(SVGNames::cxAttr)) |
| attributes.setCx(radial->cx()); |
| |
| if (!attributes.hasCy() && current->hasAttribute(SVGNames::cyAttr)) |
| attributes.setCy(radial->cy()); |
| |
| if (!attributes.hasR() && current->hasAttribute(SVGNames::rAttr)) |
| attributes.setR(radial->r()); |
| |
| if (!attributes.hasFx() && current->hasAttribute(SVGNames::fxAttr)) |
| attributes.setFx(radial->fx()); |
| |
| if (!attributes.hasFy() && current->hasAttribute(SVGNames::fyAttr)) |
| attributes.setFy(radial->fy()); |
| } |
| |
| processedGradients.add(current); |
| |
| // Respect xlink:href, take attributes from referenced element |
| Node* refNode = ownerDocument()->getElementById(SVGURIReference::getTarget(current->href())); |
| if (refNode && (refNode->hasTagName(SVGNames::radialGradientTag) || refNode->hasTagName(SVGNames::linearGradientTag))) { |
| current = static_cast<SVGGradientElement*>(refNode); |
| |
| // Cycle detection |
| if (processedGradients.contains(current)) { |
| current = 0; |
| break; |
| } |
| |
| isRadial = current->hasTagName(SVGNames::radialGradientTag); |
| } else |
| current = 0; |
| } |
| |
| // Handle default values for fx/fy |
| if (!attributes.hasFx()) |
| attributes.setFx(attributes.cx()); |
| |
| if (!attributes.hasFy()) |
| attributes.setFy(attributes.cy()); |
| } |
| |
| void SVGRadialGradientElement::calculateFocalCenterPointsAndRadius(const RadialGradientAttributes& attributes, FloatPoint& focalPoint, FloatPoint& centerPoint, float& radius) |
| { |
| // Determine gradient focal/center points and radius |
| if (attributes.boundingBoxMode()) { |
| focalPoint = FloatPoint(attributes.fx().valueAsPercentage(), attributes.fy().valueAsPercentage()); |
| centerPoint = FloatPoint(attributes.cx().valueAsPercentage(), attributes.cy().valueAsPercentage()); |
| radius = attributes.r().valueAsPercentage(); |
| } else { |
| focalPoint = FloatPoint(attributes.fx().value(this), attributes.fy().value(this)); |
| centerPoint = FloatPoint(attributes.cx().value(this), attributes.cy().value(this)); |
| radius = attributes.r().value(this); |
| } |
| |
| // Eventually adjust focal points, as described below |
| float deltaX = focalPoint.x() - centerPoint.x(); |
| float deltaY = focalPoint.y() - centerPoint.y(); |
| float radiusMax = 0.99f * radius; |
| |
| // Spec: If (fx, fy) lies outside the circle defined by (cx, cy) and r, set |
| // (fx, fy) to the point of intersection of the line through (fx, fy) and the circle. |
| // We scale the radius by 0.99 to match the behavior of FireFox. |
| if (sqrt(deltaX * deltaX + deltaY * deltaY) > radiusMax) { |
| float angle = atan2f(deltaY, deltaX); |
| |
| deltaX = cosf(angle) * radiusMax; |
| deltaY = sinf(angle) * radiusMax; |
| focalPoint = FloatPoint(deltaX + centerPoint.x(), deltaY + centerPoint.y()); |
| } |
| } |
| |
| bool SVGRadialGradientElement::selfHasRelativeLengths() const |
| { |
| return cy().isRelative() |
| || cy().isRelative() |
| || r().isRelative() |
| || fx().isRelative() |
| || fy().isRelative(); |
| } |
| |
| } |
| |
| #endif // ENABLE(SVG) |
