| /* |
| * Copyright (C) 2004, 2005, 2006, 2008 Nikolas Zimmermann <zimmermann@kde.org> |
| * Copyright (C) 2004, 2005, 2006 Rob Buis <buis@kde.org> |
| * Copyright (C) 2009, 2014 Apple Inc. 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. |
| */ |
| |
| #ifndef THIRD_PARTY_BLINK_RENDERER_CORE_SVG_SVG_ELEMENT_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_CORE_SVG_SVG_ELEMENT_H_ |
| |
| #include "base/macros.h" |
| #include "third_party/blink/renderer/core/core_export.h" |
| #include "third_party/blink/renderer/core/dom/element.h" |
| #include "third_party/blink/renderer/core/svg/properties/svg_property_info.h" |
| #include "third_party/blink/renderer/core/svg/svg_parsing_error.h" |
| #include "third_party/blink/renderer/core/svg_names.h" |
| #include "third_party/blink/renderer/platform/heap/handle.h" |
| #include "third_party/blink/renderer/platform/wtf/allocator/allocator.h" |
| #include "third_party/blink/renderer/platform/wtf/casting.h" |
| #include "third_party/blink/renderer/platform/wtf/hash_map.h" |
| |
| namespace blink { |
| |
| class AffineTransform; |
| class Document; |
| class ElementSMILAnimations; |
| class ExecutionContext; |
| class SVGAnimatedPropertyBase; |
| class SubtreeLayoutScope; |
| class SVGAnimatedString; |
| class SVGElement; |
| class SVGElementRareData; |
| class SVGElementResourceClient; |
| class SVGPropertyBase; |
| class SVGSVGElement; |
| class SVGUseElement; |
| |
| typedef HeapHashSet<Member<SVGElement>> SVGElementSet; |
| |
| class CORE_EXPORT SVGElement : public Element { |
| DEFINE_WRAPPERTYPEINFO(); |
| |
| public: |
| ~SVGElement() override; |
| |
| bool SupportsFocus() const override { return false; } |
| |
| bool IsOutermostSVGSVGElement() const; |
| |
| bool HasTagName(const SVGQualifiedName& name) const { |
| return HasLocalName(name.LocalName()); |
| } |
| |
| String title() const override; |
| bool HasRelativeLengths() const { |
| return !elements_with_relative_lengths_.IsEmpty(); |
| } |
| static bool IsAnimatableCSSProperty(const QualifiedName&); |
| |
| enum ApplyMotionTransform { |
| kExcludeMotionTransform, |
| kIncludeMotionTransform |
| }; |
| bool HasTransform(ApplyMotionTransform) const; |
| AffineTransform CalculateTransform(ApplyMotionTransform) const; |
| |
| enum CTMScope { |
| kNearestViewportScope, // Used by SVGGraphicsElement::getCTM() |
| kScreenScope, // Used by SVGGraphicsElement::getScreenCTM() |
| kAncestorScope // Used by SVGSVGElement::get{Enclosure|Intersection}List() |
| }; |
| virtual AffineTransform LocalCoordinateSpaceTransform(CTMScope) const; |
| |
| bool InstanceUpdatesBlocked() const; |
| void SetInstanceUpdatesBlocked(bool); |
| |
| // Records the SVG element as having a Web Animation on an SVG attribute that |
| // needs applying. |
| void SetWebAnimationsPending(); |
| void ApplyActiveWebAnimations(); |
| |
| void EnsureAttributeAnimValUpdated(); |
| |
| void SetWebAnimatedAttribute(const QualifiedName& attribute, |
| SVGPropertyBase*); |
| void ClearWebAnimatedAttributes(); |
| |
| ElementSMILAnimations* GetSMILAnimations(); |
| ElementSMILAnimations& EnsureSMILAnimations(); |
| const ComputedStyle* BaseComputedStyleForSMIL(); |
| |
| void SetAnimatedAttribute(const QualifiedName&, SVGPropertyBase*); |
| void ClearAnimatedAttribute(const QualifiedName&); |
| |
| SVGSVGElement* ownerSVGElement() const; |
| SVGElement* viewportElement() const; |
| |
| virtual bool IsSVGGeometryElement() const { return false; } |
| virtual bool IsSVGGraphicsElement() const { return false; } |
| virtual bool IsFilterEffect() const { return false; } |
| virtual bool IsTextContent() const { return false; } |
| virtual bool IsTextPositioning() const { return false; } |
| virtual bool IsStructurallyExternal() const { return false; } |
| |
| // For SVGTests |
| virtual bool IsValid() const { return true; } |
| |
| virtual void SvgAttributeChanged(const QualifiedName&); |
| void SvgAttributeBaseValChanged(const QualifiedName&); |
| |
| SVGAnimatedPropertyBase* PropertyFromAttribute( |
| const QualifiedName& attribute_name) const; |
| static AnimatedPropertyType AnimatedPropertyTypeForCSSAttribute( |
| const QualifiedName& attribute_name); |
| |
| void SendSVGLoadEventToSelfAndAncestorChainIfPossible(); |
| bool SendSVGLoadEventIfPossible(); |
| |
| virtual AffineTransform* AnimateMotionTransform() { return nullptr; } |
| |
| void InvalidateSVGAttributes() { |
| EnsureUniqueElementData().SetSvgAttributesAreDirty(true); |
| } |
| void InvalidateSVGPresentationAttributeStyle() { |
| EnsureUniqueElementData().SetPresentationAttributeStyleIsDirty(true); |
| } |
| |
| const HeapHashSet<WeakMember<SVGElement>>& InstancesForElement() const; |
| void MapInstanceToElement(SVGElement*); |
| void RemoveInstanceMapping(SVGElement*); |
| |
| SVGElement* CorrespondingElement() const; |
| void SetCorrespondingElement(SVGElement*); |
| SVGUseElement* GeneratingUseElement() const; |
| |
| void SynchronizeSVGAttribute(const QualifiedName&) const; |
| void CollectStyleForAnimatedPresentationAttributes( |
| MutableCSSPropertyValueSet*); |
| |
| scoped_refptr<ComputedStyle> CustomStyleForLayoutObject() final; |
| bool LayoutObjectIsNeeded(const ComputedStyle&) const override; |
| |
| #if DCHECK_IS_ON() |
| virtual bool IsAnimatableAttribute(const QualifiedName&) const; |
| #endif |
| |
| MutableCSSPropertyValueSet* AnimatedSMILStyleProperties() const; |
| MutableCSSPropertyValueSet* EnsureAnimatedSMILStyleProperties(); |
| |
| virtual bool HaveLoadedRequiredResources(); |
| |
| void InvalidateRelativeLengthClients(SubtreeLayoutScope* = nullptr); |
| |
| void AddToPropertyMap(SVGAnimatedPropertyBase*); |
| |
| SVGAnimatedString* className() { return class_name_.Get(); } |
| |
| bool InUseShadowTree() const; |
| |
| void AddReferenceTo(SVGElement*); |
| template <typename InvalidationFunction> |
| void NotifyIncomingReferences(InvalidationFunction&&); |
| void RebuildAllIncomingReferences(); |
| void RemoveAllIncomingReferences(); |
| void RemoveAllOutgoingReferences(); |
| |
| SVGElementResourceClient* GetSVGResourceClient(); |
| SVGElementResourceClient& EnsureSVGResourceClient(); |
| |
| class InvalidationGuard { |
| STACK_ALLOCATED(); |
| |
| public: |
| InvalidationGuard(SVGElement* element) : element_(element) {} |
| ~InvalidationGuard() { element_->InvalidateInstances(); } |
| |
| private: |
| SVGElement* element_; |
| DISALLOW_COPY_AND_ASSIGN(InvalidationGuard); |
| }; |
| |
| class InstanceUpdateBlocker { |
| STACK_ALLOCATED(); |
| |
| public: |
| InstanceUpdateBlocker(SVGElement* target_element); |
| ~InstanceUpdateBlocker(); |
| |
| private: |
| SVGElement* target_element_; |
| DISALLOW_COPY_AND_ASSIGN(InstanceUpdateBlocker); |
| }; |
| |
| void InvalidateInstances(); |
| void SetNeedsStyleRecalcForInstances(StyleChangeType, |
| const StyleChangeReasonForTracing&); |
| |
| void Trace(Visitor*) const override; |
| |
| static const AtomicString& EventParameterName(); |
| |
| bool IsPresentationAttribute(const QualifiedName&) const override; |
| |
| bool HasSVGParent() const; |
| |
| protected: |
| SVGElement(const QualifiedName&, |
| Document&, |
| ConstructionType = kCreateSVGElement); |
| |
| void ParseAttribute(const AttributeModificationParams&) override; |
| void AttributeChanged(const AttributeModificationParams&) override; |
| |
| void CollectStyleForPresentationAttribute( |
| const QualifiedName&, |
| const AtomicString&, |
| MutableCSSPropertyValueSet*) override; |
| |
| InsertionNotificationRequest InsertedInto(ContainerNode&) override; |
| void RemovedFrom(ContainerNode&) override; |
| void ChildrenChanged(const ChildrenChange&) override; |
| |
| void DetachLayoutTree(bool performing_reattach) override; |
| |
| static CSSPropertyID CssPropertyIdForSVGAttributeName(const ExecutionContext*, |
| const QualifiedName&); |
| void UpdateRelativeLengthsInformation() { |
| UpdateRelativeLengthsInformation(SelfHasRelativeLengths(), this); |
| } |
| void UpdateRelativeLengthsInformation(bool has_relative_lengths, SVGElement*); |
| static void MarkForLayoutAndParentResourceInvalidation(LayoutObject&); |
| |
| virtual bool SelfHasRelativeLengths() const { return false; } |
| |
| SVGElementSet* SetOfIncomingReferences() const; |
| |
| SVGElementRareData* EnsureSVGRareData(); |
| inline bool HasSVGRareData() const { return svg_rare_data_; } |
| inline SVGElementRareData* SvgRareData() const { |
| DCHECK(svg_rare_data_); |
| return svg_rare_data_.Get(); |
| } |
| |
| void ReportAttributeParsingError(SVGParsingError, |
| const QualifiedName&, |
| const AtomicString&); |
| bool HasFocusEventListeners() const; |
| |
| void AddedEventListener(const AtomicString& event_type, |
| RegisteredEventListener&) final; |
| void RemovedEventListener(const AtomicString& event_type, |
| const RegisteredEventListener&) final; |
| |
| void AccessKeyAction(bool send_mouse_events) override; |
| |
| private: |
| bool IsSVGElement() const = |
| delete; // This will catch anyone doing an unnecessary check. |
| bool IsStyledElement() const = |
| delete; // This will catch anyone doing an unnecessary check. |
| |
| void WillRecalcStyle(const StyleRecalcChange) override; |
| static SVGElementSet& GetDependencyTraversalVisitedSet(); |
| void UpdateWebAnimatedAttributeOnBaseValChange(const QualifiedName&); |
| |
| HeapHashSet<WeakMember<SVGElement>> elements_with_relative_lengths_; |
| |
| typedef HeapHashMap<QualifiedName, Member<SVGAnimatedPropertyBase>> |
| AttributeToPropertyMap; |
| AttributeToPropertyMap attribute_to_property_map_; |
| |
| #if DCHECK_IS_ON() |
| bool in_relative_length_clients_invalidation_ = false; |
| #endif |
| |
| Member<SVGElementRareData> svg_rare_data_; |
| Member<SVGAnimatedString> class_name_; |
| }; |
| |
| template <typename InvalidationFunction> |
| void SVGElement::NotifyIncomingReferences( |
| InvalidationFunction&& invalidation_function) { |
| SVGElementSet* dependencies = SetOfIncomingReferences(); |
| if (!dependencies) |
| return; |
| |
| // We allow cycles in the reference graph in order to avoid expensive |
| // adjustments on changes, so we need to break possible cycles here. |
| SVGElementSet& invalidating_dependencies = GetDependencyTraversalVisitedSet(); |
| |
| for (SVGElement* element : *dependencies) { |
| if (!element->GetLayoutObject()) |
| continue; |
| if (UNLIKELY(!invalidating_dependencies.insert(element).is_new_entry)) { |
| // Reference cycle: we are in process of invalidating this dependant. |
| continue; |
| } |
| invalidation_function(*element); |
| invalidating_dependencies.erase(element); |
| } |
| } |
| |
| struct SVGAttributeHashTranslator { |
| STATIC_ONLY(SVGAttributeHashTranslator); |
| static unsigned GetHash(const QualifiedName& key) { |
| if (key.HasPrefix()) { |
| QualifiedNameComponents components = {g_null_atom.Impl(), |
| key.LocalName().Impl(), |
| key.NamespaceURI().Impl()}; |
| return HashComponents(components); |
| } |
| return DefaultHash<QualifiedName>::Hash::GetHash(key); |
| } |
| static bool Equal(const QualifiedName& a, const QualifiedName& b) { |
| return a.Matches(b); |
| } |
| }; |
| |
| template <typename T> |
| bool IsElementOfType(const SVGElement&); |
| template <> |
| inline bool IsElementOfType<const SVGElement>(const SVGElement&) { |
| return true; |
| } |
| template <> |
| inline bool IsElementOfType<const SVGElement>(const Node& node) { |
| return IsA<SVGElement>(node); |
| } |
| template <> |
| struct DowncastTraits<SVGElement> { |
| static bool AllowFrom(const Node& node) { return node.IsSVGElement(); } |
| }; |
| inline bool Node::HasTagName(const SVGQualifiedName& name) const { |
| auto* svg_element = DynamicTo<SVGElement>(this); |
| return svg_element && svg_element->HasTagName(name); |
| } |
| |
| } // namespace blink |
| |
| #include "third_party/blink/renderer/core/svg_element_type_helpers.h" |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_CORE_SVG_SVG_ELEMENT_H_ |