| /* |
| * 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" |
| #include "core/svg/SVGLinearGradientElement.h" |
| |
| #include "core/layout/svg/LayoutSVGResourceLinearGradient.h" |
| #include "core/svg/LinearGradientAttributes.h" |
| #include "core/svg/SVGLength.h" |
| |
| namespace blink { |
| |
| inline SVGLinearGradientElement::SVGLinearGradientElement(Document& document) |
| : SVGGradientElement(SVGNames::linearGradientTag, document) |
| , m_x1(SVGAnimatedLength::create(this, SVGNames::x1Attr, SVGLength::create(SVGLengthMode::Width), AllowNegativeLengths)) |
| , m_y1(SVGAnimatedLength::create(this, SVGNames::y1Attr, SVGLength::create(SVGLengthMode::Height), AllowNegativeLengths)) |
| , m_x2(SVGAnimatedLength::create(this, SVGNames::x2Attr, SVGLength::create(SVGLengthMode::Width), AllowNegativeLengths)) |
| , m_y2(SVGAnimatedLength::create(this, SVGNames::y2Attr, SVGLength::create(SVGLengthMode::Height), AllowNegativeLengths)) |
| { |
| |
| // Spec: If the x1|y1|y2 attribute is not specified, the effect is as if a value of "0%" were specified. |
| m_x1->setDefaultValueAsString("0%"); |
| m_y1->setDefaultValueAsString("0%"); |
| m_y2->setDefaultValueAsString("0%"); |
| |
| // Spec: If the x2 attribute is not specified, the effect is as if a value of "100%" were specified. |
| m_x2->setDefaultValueAsString("100%"); |
| |
| addToPropertyMap(m_x1); |
| addToPropertyMap(m_y1); |
| addToPropertyMap(m_x2); |
| addToPropertyMap(m_y2); |
| } |
| |
| DEFINE_TRACE(SVGLinearGradientElement) |
| { |
| visitor->trace(m_x1); |
| visitor->trace(m_y1); |
| visitor->trace(m_x2); |
| visitor->trace(m_y2); |
| SVGGradientElement::trace(visitor); |
| } |
| |
| DEFINE_NODE_FACTORY(SVGLinearGradientElement) |
| |
| void SVGLinearGradientElement::svgAttributeChanged(const QualifiedName& attrName) |
| { |
| if (attrName == SVGNames::x1Attr || attrName == SVGNames::x2Attr |
| || attrName == SVGNames::y1Attr || attrName == SVGNames::y2Attr) { |
| SVGElement::InvalidationGuard invalidationGuard(this); |
| |
| updateRelativeLengthsInformation(); |
| |
| LayoutSVGResourceContainer* layoutObject = toLayoutSVGResourceContainer(this->layoutObject()); |
| if (layoutObject) |
| layoutObject->invalidateCacheAndMarkForLayout(); |
| |
| return; |
| } |
| |
| SVGGradientElement::svgAttributeChanged(attrName); |
| } |
| |
| LayoutObject* SVGLinearGradientElement::createLayoutObject(const ComputedStyle&) |
| { |
| return new LayoutSVGResourceLinearGradient(this); |
| } |
| |
| static void setGradientAttributes(SVGGradientElement* element, LinearGradientAttributes& attributes, bool isLinear = true) |
| { |
| if (!attributes.hasSpreadMethod() && element->spreadMethod()->isSpecified()) |
| attributes.setSpreadMethod(element->spreadMethod()->currentValue()->enumValue()); |
| |
| if (!attributes.hasGradientUnits() && element->gradientUnits()->isSpecified()) |
| attributes.setGradientUnits(element->gradientUnits()->currentValue()->enumValue()); |
| |
| if (!attributes.hasGradientTransform() && element->gradientTransform()->isSpecified()) { |
| AffineTransform transform; |
| element->gradientTransform()->currentValue()->concatenate(transform); |
| attributes.setGradientTransform(transform); |
| } |
| |
| if (!attributes.hasStops()) { |
| const Vector<Gradient::ColorStop>& stops(element->buildStops()); |
| if (!stops.isEmpty()) |
| attributes.setStops(stops); |
| } |
| |
| if (isLinear) { |
| SVGLinearGradientElement* linear = toSVGLinearGradientElement(element); |
| |
| if (!attributes.hasX1() && linear->x1()->isSpecified()) |
| attributes.setX1(linear->x1()->currentValue()); |
| |
| if (!attributes.hasY1() && linear->y1()->isSpecified()) |
| attributes.setY1(linear->y1()->currentValue()); |
| |
| if (!attributes.hasX2() && linear->x2()->isSpecified()) |
| attributes.setX2(linear->x2()->currentValue()); |
| |
| if (!attributes.hasY2() && linear->y2()->isSpecified()) |
| attributes.setY2(linear->y2()->currentValue()); |
| } |
| } |
| |
| bool SVGLinearGradientElement::collectGradientAttributes(LinearGradientAttributes& attributes) |
| { |
| if (!layoutObject()) |
| return false; |
| |
| WillBeHeapHashSet<RawPtrWillBeMember<SVGGradientElement>> processedGradients; |
| SVGGradientElement* current = this; |
| |
| setGradientAttributes(current, attributes); |
| processedGradients.add(current); |
| |
| while (true) { |
| // Respect xlink:href, take attributes from referenced element |
| Node* refNode = SVGURIReference::targetElementFromIRIString(current->href()->currentValue()->value(), treeScope()); |
| if (refNode && isSVGGradientElement(*refNode)) { |
| current = toSVGGradientElement(refNode); |
| |
| // Cycle detection |
| if (processedGradients.contains(current)) |
| return true; |
| |
| if (!current->layoutObject()) |
| return false; |
| |
| setGradientAttributes(current, attributes, isSVGLinearGradientElement(*current)); |
| processedGradients.add(current); |
| } else { |
| return true; |
| } |
| } |
| |
| ASSERT_NOT_REACHED(); |
| return false; |
| } |
| |
| bool SVGLinearGradientElement::selfHasRelativeLengths() const |
| { |
| return m_x1->currentValue()->isRelative() |
| || m_y1->currentValue()->isRelative() |
| || m_x2->currentValue()->isRelative() |
| || m_y2->currentValue()->isRelative(); |
| } |
| |
| } // namespace blink |