| /* |
| * Copyright (C) 2004, 2005, 2006, 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. |
| */ |
| |
| #ifndef SVGUseElement_h |
| #define SVGUseElement_h |
| |
| #include "core/events/EventSender.h" |
| #include "core/fetch/DocumentResource.h" |
| #include "core/svg/SVGAnimatedLength.h" |
| #include "core/svg/SVGGeometryElement.h" |
| #include "core/svg/SVGGraphicsElement.h" |
| #include "core/svg/SVGURIReference.h" |
| #include "platform/heap/Handle.h" |
| |
| namespace blink { |
| |
| using SVGUseEventSender = EventSender<SVGUseElement>; |
| |
| class SVGUseElement final : public SVGGraphicsElement, |
| public SVGURIReference, |
| public DocumentResourceClient { |
| |
| DEFINE_WRAPPERTYPEINFO(); |
| USING_GARBAGE_COLLECTED_MIXIN(SVGUseElement); |
| USING_PRE_FINALIZER(SVGUseElement, dispose); |
| public: |
| static SVGUseElement* create(Document&); |
| ~SVGUseElement() override; |
| |
| void invalidateShadowTree(); |
| |
| // Return the element that should be used for clipping, |
| // or null if a valid clip element is not directly referenced. |
| SVGGraphicsElement* visibleTargetGraphicsElementForClipping() const; |
| |
| SVGAnimatedLength* x() const { return m_x.get(); } |
| SVGAnimatedLength* y() const { return m_y.get(); } |
| SVGAnimatedLength* width() const { return m_width.get(); } |
| SVGAnimatedLength* height() const { return m_height.get(); } |
| |
| void buildPendingResource() override; |
| |
| void dispatchPendingEvent(SVGUseEventSender*); |
| void toClipPath(Path&) const; |
| |
| DECLARE_VIRTUAL_TRACE(); |
| |
| private: |
| explicit SVGUseElement(Document&); |
| |
| void dispose(); |
| |
| FloatRect getBBox() override; |
| |
| bool isPresentationAttribute(const QualifiedName&) const override; |
| void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStylePropertySet*) override; |
| bool isPresentationAttributeWithSVGDOM(const QualifiedName&) const override; |
| |
| bool isStructurallyExternal() const override; |
| |
| InsertionNotificationRequest insertedInto(ContainerNode*) override; |
| void removedFrom(ContainerNode*) override; |
| |
| void svgAttributeChanged(const QualifiedName&) override; |
| |
| LayoutObject* createLayoutObject(const ComputedStyle&) override; |
| |
| void scheduleShadowTreeRecreation(); |
| void cancelShadowTreeRecreation(); |
| bool haveLoadedRequiredResources() override { return !isStructurallyExternal() || m_haveFiredLoadEvent; } |
| |
| bool selfHasRelativeLengths() const override; |
| |
| // Instance tree handling |
| Element* resolveTargetElement(); |
| void buildShadowAndInstanceTree(SVGElement& target); |
| void clearInstanceRoot(); |
| Element* createInstanceTree(SVGElement& targetRoot) const; |
| void clearShadowTree(); |
| bool hasCycleUseReferencing(const SVGUseElement&, const ContainerNode& targetInstance, SVGElement*& newTarget) const; |
| bool expandUseElementsInShadowTree(); |
| void addReferencesToFirstDegreeNestedUseElements(SVGElement& target); |
| |
| void invalidateDependentShadowTrees(); |
| |
| bool resourceIsStillLoading() const; |
| bool resourceIsValid() const; |
| bool instanceTreeIsLoading() const; |
| void notifyFinished(Resource*) override; |
| String debugName() const override { return "SVGUseElement"; } |
| void updateTargetReference(); |
| void setDocumentResource(DocumentResource*); |
| |
| Member<SVGAnimatedLength> m_x; |
| Member<SVGAnimatedLength> m_y; |
| Member<SVGAnimatedLength> m_width; |
| Member<SVGAnimatedLength> m_height; |
| |
| AtomicString m_elementIdentifier; |
| bool m_elementIdentifierIsLocal; |
| bool m_haveFiredLoadEvent; |
| bool m_needsShadowTreeRecreation; |
| Member<SVGElement> m_targetElementInstance; |
| Member<DocumentResource> m_resource; |
| }; |
| |
| } // namespace blink |
| |
| #endif // SVGUseElement_h |