| /* |
| * Copyright (C) 2004, 2005, 2006, 2008 Nikolas Zimmermann <zimmermann@kde.org> |
| * Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis@kde.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 "core/svg/SVGGradientElement.h" |
| |
| #include "core/css/StyleChangeReason.h" |
| #include "core/dom/Attribute.h" |
| #include "core/dom/ElementTraversal.h" |
| #include "core/layout/svg/LayoutSVGResourceContainer.h" |
| #include "core/svg/GradientAttributes.h" |
| #include "core/svg/SVGStopElement.h" |
| #include "core/svg/SVGTransformList.h" |
| |
| namespace blink { |
| |
| template <> |
| const SVGEnumerationStringEntries& |
| GetStaticStringEntries<SVGSpreadMethodType>() { |
| DEFINE_STATIC_LOCAL(SVGEnumerationStringEntries, entries, ()); |
| if (entries.IsEmpty()) { |
| entries.push_back(std::make_pair(kSVGSpreadMethodPad, "pad")); |
| entries.push_back(std::make_pair(kSVGSpreadMethodReflect, "reflect")); |
| entries.push_back(std::make_pair(kSVGSpreadMethodRepeat, "repeat")); |
| } |
| return entries; |
| } |
| |
| SVGGradientElement::SVGGradientElement(const QualifiedName& tag_name, |
| Document& document) |
| : SVGElement(tag_name, document), |
| SVGURIReference(this), |
| gradient_transform_( |
| SVGAnimatedTransformList::Create(this, |
| SVGNames::gradientTransformAttr, |
| CSSPropertyTransform)), |
| spread_method_(SVGAnimatedEnumeration<SVGSpreadMethodType>::Create( |
| this, |
| SVGNames::spreadMethodAttr, |
| kSVGSpreadMethodPad)), |
| gradient_units_(SVGAnimatedEnumeration<SVGUnitTypes::SVGUnitType>::Create( |
| this, |
| SVGNames::gradientUnitsAttr, |
| SVGUnitTypes::kSvgUnitTypeObjectboundingbox)) { |
| AddToPropertyMap(gradient_transform_); |
| AddToPropertyMap(spread_method_); |
| AddToPropertyMap(gradient_units_); |
| } |
| |
| void SVGGradientElement::Trace(blink::Visitor* visitor) { |
| visitor->Trace(gradient_transform_); |
| visitor->Trace(spread_method_); |
| visitor->Trace(gradient_units_); |
| SVGElement::Trace(visitor); |
| SVGURIReference::Trace(visitor); |
| } |
| |
| void SVGGradientElement::CollectStyleForPresentationAttribute( |
| const QualifiedName& name, |
| const AtomicString& value, |
| MutableCSSPropertyValueSet* style) { |
| if (name == SVGNames::gradientTransformAttr) { |
| AddPropertyToPresentationAttributeStyle( |
| style, CSSPropertyTransform, |
| gradient_transform_->CurrentValue()->CssValue()); |
| return; |
| } |
| SVGElement::CollectStyleForPresentationAttribute(name, value, style); |
| } |
| |
| void SVGGradientElement::SvgAttributeChanged(const QualifiedName& attr_name) { |
| if (attr_name == SVGNames::gradientTransformAttr) { |
| InvalidateSVGPresentationAttributeStyle(); |
| SetNeedsStyleRecalc(kLocalStyleChange, |
| StyleChangeReasonForTracing::FromAttribute(attr_name)); |
| } |
| |
| if (attr_name == SVGNames::gradientUnitsAttr || |
| attr_name == SVGNames::gradientTransformAttr || |
| attr_name == SVGNames::spreadMethodAttr || |
| SVGURIReference::IsKnownAttribute(attr_name)) { |
| SVGElement::InvalidationGuard invalidation_guard(this); |
| |
| LayoutSVGResourceContainer* layout_object = |
| ToLayoutSVGResourceContainer(this->GetLayoutObject()); |
| if (layout_object) |
| layout_object->InvalidateCacheAndMarkForLayout(); |
| |
| return; |
| } |
| |
| SVGElement::SvgAttributeChanged(attr_name); |
| } |
| |
| void SVGGradientElement::ChildrenChanged(const ChildrenChange& change) { |
| SVGElement::ChildrenChanged(change); |
| |
| if (change.by_parser) |
| return; |
| |
| if (auto* object = ToLayoutSVGResourceContainer(GetLayoutObject())) { |
| object->SetNeedsLayoutAndFullPaintInvalidation( |
| LayoutInvalidationReason::kChildChanged); |
| if (object->EverHadLayout()) |
| object->RemoveAllClientsFromCache(); |
| } |
| } |
| |
| void SVGGradientElement::CollectCommonAttributes( |
| GradientAttributes& attributes) const { |
| if (!attributes.HasSpreadMethod() && spreadMethod()->IsSpecified()) |
| attributes.SetSpreadMethod(spreadMethod()->CurrentValue()->EnumValue()); |
| |
| if (!attributes.HasGradientUnits() && gradientUnits()->IsSpecified()) |
| attributes.SetGradientUnits(gradientUnits()->CurrentValue()->EnumValue()); |
| |
| if (!attributes.HasGradientTransform() && |
| HasTransform(SVGElement::kExcludeMotionTransform)) { |
| attributes.SetGradientTransform( |
| CalculateTransform(SVGElement::kExcludeMotionTransform)); |
| } |
| |
| if (!attributes.HasStops()) { |
| const Vector<Gradient::ColorStop>& stops(BuildStops()); |
| if (!stops.IsEmpty()) |
| attributes.SetStops(stops); |
| } |
| } |
| |
| const SVGGradientElement* SVGGradientElement::ReferencedElement() const { |
| // Respect xlink:href, take attributes from referenced element. |
| Element* referenced_element = |
| TargetElementFromIRIString(HrefString(), GetTreeScope()); |
| if (!referenced_element || !IsSVGGradientElement(*referenced_element)) |
| return nullptr; |
| return ToSVGGradientElement(referenced_element); |
| } |
| |
| Vector<Gradient::ColorStop> SVGGradientElement::BuildStops() const { |
| Vector<Gradient::ColorStop> stops; |
| |
| float previous_offset = 0.0f; |
| for (const SVGStopElement& stop : |
| Traversal<SVGStopElement>::ChildrenOf(*this)) { |
| // Figure out right monotonic offset. |
| float offset = stop.offset()->CurrentValue()->Value(); |
| offset = std::min(std::max(previous_offset, offset), 1.0f); |
| previous_offset = offset; |
| |
| stops.push_back( |
| Gradient::ColorStop(offset, stop.StopColorIncludingOpacity())); |
| } |
| return stops; |
| } |
| |
| } // namespace blink |