| /* |
| * 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 "third_party/blink/renderer/core/svg/svg_linear_gradient_element.h" |
| |
| #include "third_party/blink/renderer/core/layout/svg/layout_svg_resource_linear_gradient.h" |
| #include "third_party/blink/renderer/core/svg/linear_gradient_attributes.h" |
| #include "third_party/blink/renderer/core/svg/svg_length.h" |
| |
| namespace blink { |
| |
| inline SVGLinearGradientElement::SVGLinearGradientElement(Document& document) |
| : SVGGradientElement(svg_names::kLinearGradientTag, document), |
| // Spec: If the x1|y1|y2 attribute is not specified, the effect is as if a |
| // value of "0%" were specified. |
| // Spec: If the x2 attribute is not specified, the effect is as if a value |
| // of "100%" were specified. |
| x1_(SVGAnimatedLength::Create(this, |
| svg_names::kX1Attr, |
| SVGLengthMode::kWidth, |
| SVGLength::Initial::kPercent0)), |
| y1_(SVGAnimatedLength::Create(this, |
| svg_names::kY1Attr, |
| SVGLengthMode::kHeight, |
| SVGLength::Initial::kPercent0)), |
| x2_(SVGAnimatedLength::Create(this, |
| svg_names::kX2Attr, |
| SVGLengthMode::kWidth, |
| SVGLength::Initial::kPercent100)), |
| y2_(SVGAnimatedLength::Create(this, |
| svg_names::kY2Attr, |
| SVGLengthMode::kHeight, |
| SVGLength::Initial::kPercent0)) { |
| AddToPropertyMap(x1_); |
| AddToPropertyMap(y1_); |
| AddToPropertyMap(x2_); |
| AddToPropertyMap(y2_); |
| } |
| |
| void SVGLinearGradientElement::Trace(blink::Visitor* visitor) { |
| visitor->Trace(x1_); |
| visitor->Trace(y1_); |
| visitor->Trace(x2_); |
| visitor->Trace(y2_); |
| SVGGradientElement::Trace(visitor); |
| } |
| |
| DEFINE_NODE_FACTORY(SVGLinearGradientElement) |
| |
| void SVGLinearGradientElement::SvgAttributeChanged( |
| const QualifiedName& attr_name) { |
| if (attr_name == svg_names::kX1Attr || attr_name == svg_names::kX2Attr || |
| attr_name == svg_names::kY1Attr || attr_name == svg_names::kY2Attr) { |
| SVGElement::InvalidationGuard invalidation_guard(this); |
| UpdateRelativeLengthsInformation(); |
| InvalidateGradient(layout_invalidation_reason::kAttributeChanged); |
| return; |
| } |
| |
| SVGGradientElement::SvgAttributeChanged(attr_name); |
| } |
| |
| LayoutObject* SVGLinearGradientElement::CreateLayoutObject( |
| const ComputedStyle&) { |
| return new LayoutSVGResourceLinearGradient(this); |
| } |
| |
| static void SetGradientAttributes(const SVGGradientElement& element, |
| LinearGradientAttributes& attributes, |
| bool is_linear) { |
| element.SynchronizeAnimatedSVGAttribute(AnyQName()); |
| element.CollectCommonAttributes(attributes); |
| |
| if (!is_linear) |
| return; |
| const 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) { |
| DCHECK(GetLayoutObject()); |
| |
| VisitedSet visited; |
| const SVGGradientElement* current = this; |
| |
| while (true) { |
| SetGradientAttributes(*current, attributes, |
| IsSVGLinearGradientElement(*current)); |
| visited.insert(current); |
| |
| current = current->ReferencedElement(); |
| if (!current || visited.Contains(current)) |
| break; |
| if (!current->GetLayoutObject()) |
| return false; |
| } |
| return true; |
| } |
| |
| bool SVGLinearGradientElement::SelfHasRelativeLengths() const { |
| return x1_->CurrentValue()->IsRelative() || |
| y1_->CurrentValue()->IsRelative() || |
| x2_->CurrentValue()->IsRelative() || y2_->CurrentValue()->IsRelative(); |
| } |
| |
| } // namespace blink |