| /* |
| * Copyright (C) 2004, 2005, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org> |
| * Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org> |
| * |
| * 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_stop_element.h" |
| |
| #include "third_party/blink/renderer/core/dom/node_computed_style.h" |
| #include "third_party/blink/renderer/core/style/computed_style.h" |
| #include "third_party/blink/renderer/core/svg/svg_animated_number.h" |
| #include "third_party/blink/renderer/core/svg/svg_gradient_element.h" |
| #include "third_party/blink/renderer/platform/heap/heap.h" |
| |
| namespace blink { |
| |
| SVGStopElement::SVGStopElement(Document& document) |
| : SVGElement(svg_names::kStopTag, document), |
| offset_(MakeGarbageCollected<SVGAnimatedNumber>( |
| this, |
| svg_names::kOffsetAttr, |
| MakeGarbageCollected<SVGNumberAcceptPercentage>())) { |
| AddToPropertyMap(offset_); |
| |
| // Since stop elements don't have corresponding layout objects, we rely on |
| // style recalc callbacks for invalidation. |
| DCHECK(HasCustomStyleCallbacks()); |
| } |
| |
| void SVGStopElement::Trace(Visitor* visitor) const { |
| visitor->Trace(offset_); |
| SVGElement::Trace(visitor); |
| } |
| |
| namespace { |
| |
| void InvalidateInstancesAndAncestorResources(SVGStopElement* stop_element) { |
| SVGElement::InvalidationGuard invalidation_guard(stop_element); |
| |
| Element* parent = stop_element->parentElement(); |
| if (auto* gradient = DynamicTo<SVGGradientElement>(parent)) |
| gradient->InvalidateGradient(layout_invalidation_reason::kChildChanged); |
| } |
| |
| } // namespace |
| |
| void SVGStopElement::SvgAttributeChanged( |
| const SvgAttributeChangedParams& params) { |
| if (params.name == svg_names::kOffsetAttr) { |
| InvalidateInstancesAndAncestorResources(this); |
| return; |
| } |
| |
| SVGElement::SvgAttributeChanged(params); |
| } |
| |
| void SVGStopElement::DidRecalcStyle(const StyleRecalcChange change) { |
| SVGElement::DidRecalcStyle(change); |
| |
| InvalidateInstancesAndAncestorResources(this); |
| } |
| |
| Color SVGStopElement::StopColorIncludingOpacity() const { |
| const ComputedStyle* style = GetComputedStyle(); |
| |
| // Normally, we should always have a computed style for <stop> elements. But |
| // there are some odd corner cases which leave it null. It is possible that |
| // the only such corner cases were due to Shadow DOM v0. This may be able |
| // to be removed. |
| if (!style) |
| return Color::kBlack; |
| |
| Color base_color = style->VisitedDependentColor(GetCSSPropertyStopColor()); |
| return base_color.CombineWithAlpha(style->StopOpacity()); |
| } |
| |
| } // namespace blink |