mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-14 15:37:55 +00:00
491 lines
14 KiB
C++
491 lines
14 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/ArrayUtils.h"
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#include "mozilla/dom/SVGUseElement.h"
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#include "mozilla/dom/SVGUseElementBinding.h"
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#include "nsGkAtoms.h"
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#include "mozilla/dom/SVGSVGElement.h"
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#include "nsIDocument.h"
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#include "nsIPresShell.h"
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#include "mozilla/dom/Element.h"
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#include "nsContentUtils.h"
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#include "nsIURI.h"
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NS_IMPL_NS_NEW_NAMESPACED_SVG_ELEMENT(Use)
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namespace mozilla {
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namespace dom {
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JSObject*
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SVGUseElement::WrapNode(JSContext *aCx)
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{
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return SVGUseElementBinding::Wrap(aCx, this);
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}
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////////////////////////////////////////////////////////////////////////
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// implementation
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nsSVGElement::LengthInfo SVGUseElement::sLengthInfo[4] =
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{
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{ &nsGkAtoms::x, 0, nsIDOMSVGLength::SVG_LENGTHTYPE_NUMBER, SVGContentUtils::X },
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{ &nsGkAtoms::y, 0, nsIDOMSVGLength::SVG_LENGTHTYPE_NUMBER, SVGContentUtils::Y },
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{ &nsGkAtoms::width, 0, nsIDOMSVGLength::SVG_LENGTHTYPE_NUMBER, SVGContentUtils::X },
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{ &nsGkAtoms::height, 0, nsIDOMSVGLength::SVG_LENGTHTYPE_NUMBER, SVGContentUtils::Y },
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};
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nsSVGElement::StringInfo SVGUseElement::sStringInfo[1] =
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{
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{ &nsGkAtoms::href, kNameSpaceID_XLink, true }
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};
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//----------------------------------------------------------------------
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// nsISupports methods
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NS_IMPL_CYCLE_COLLECTION_CLASS(SVGUseElement)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(SVGUseElement,
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SVGUseElementBase)
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nsAutoScriptBlocker scriptBlocker;
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mOriginal)
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tmp->DestroyAnonymousContent();
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tmp->UnlinkSource();
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NS_IMPL_CYCLE_COLLECTION_UNLINK_END
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(SVGUseElement,
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SVGUseElementBase)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mOriginal)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mClone)
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tmp->mSource.Traverse(&cb);
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
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NS_IMPL_ADDREF_INHERITED(SVGUseElement,SVGUseElementBase)
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NS_IMPL_RELEASE_INHERITED(SVGUseElement,SVGUseElementBase)
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NS_INTERFACE_TABLE_HEAD_CYCLE_COLLECTION_INHERITED(SVGUseElement)
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NS_INTERFACE_TABLE_INHERITED(SVGUseElement, nsIMutationObserver)
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NS_INTERFACE_TABLE_TAIL_INHERITING(SVGUseElementBase)
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//----------------------------------------------------------------------
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// Implementation
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SVGUseElement::SVGUseElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo)
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: SVGUseElementBase(aNodeInfo), mSource(this)
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{
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}
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SVGUseElement::~SVGUseElement()
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{
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UnlinkSource();
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}
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//----------------------------------------------------------------------
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// nsIDOMNode methods
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nsresult
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SVGUseElement::Clone(mozilla::dom::NodeInfo *aNodeInfo, nsINode **aResult) const
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{
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*aResult = nullptr;
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already_AddRefed<mozilla::dom::NodeInfo> ni = nsRefPtr<mozilla::dom::NodeInfo>(aNodeInfo).forget();
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SVGUseElement *it = new SVGUseElement(ni);
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nsCOMPtr<nsINode> kungFuDeathGrip(it);
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nsresult rv1 = it->Init();
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nsresult rv2 = const_cast<SVGUseElement*>(this)->CopyInnerTo(it);
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// SVGUseElement specific portion - record who we cloned from
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it->mOriginal = const_cast<SVGUseElement*>(this);
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if (NS_SUCCEEDED(rv1) && NS_SUCCEEDED(rv2)) {
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kungFuDeathGrip.swap(*aResult);
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}
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return NS_FAILED(rv1) ? rv1 : rv2;
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}
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already_AddRefed<SVGAnimatedString>
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SVGUseElement::Href()
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{
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return mStringAttributes[HREF].ToDOMAnimatedString(this);
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}
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//----------------------------------------------------------------------
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already_AddRefed<SVGAnimatedLength>
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SVGUseElement::X()
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{
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return mLengthAttributes[ATTR_X].ToDOMAnimatedLength(this);
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}
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already_AddRefed<SVGAnimatedLength>
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SVGUseElement::Y()
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{
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return mLengthAttributes[ATTR_Y].ToDOMAnimatedLength(this);
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}
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already_AddRefed<SVGAnimatedLength>
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SVGUseElement::Width()
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{
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return mLengthAttributes[ATTR_WIDTH].ToDOMAnimatedLength(this);
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}
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already_AddRefed<SVGAnimatedLength>
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SVGUseElement::Height()
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{
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return mLengthAttributes[ATTR_HEIGHT].ToDOMAnimatedLength(this);
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}
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//----------------------------------------------------------------------
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// nsIMutationObserver methods
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void
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SVGUseElement::CharacterDataChanged(nsIDocument *aDocument,
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nsIContent *aContent,
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CharacterDataChangeInfo* aInfo)
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{
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if (nsContentUtils::IsInSameAnonymousTree(this, aContent)) {
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TriggerReclone();
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}
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}
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void
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SVGUseElement::AttributeChanged(nsIDocument* aDocument,
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Element* aElement,
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int32_t aNameSpaceID,
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nsIAtom* aAttribute,
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int32_t aModType)
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{
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if (nsContentUtils::IsInSameAnonymousTree(this, aElement)) {
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TriggerReclone();
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}
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}
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void
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SVGUseElement::ContentAppended(nsIDocument *aDocument,
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nsIContent *aContainer,
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nsIContent *aFirstNewContent,
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int32_t aNewIndexInContainer)
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{
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if (nsContentUtils::IsInSameAnonymousTree(this, aContainer)) {
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TriggerReclone();
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}
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}
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void
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SVGUseElement::ContentInserted(nsIDocument *aDocument,
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nsIContent *aContainer,
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nsIContent *aChild,
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int32_t aIndexInContainer)
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{
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if (nsContentUtils::IsInSameAnonymousTree(this, aChild)) {
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TriggerReclone();
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}
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}
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void
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SVGUseElement::ContentRemoved(nsIDocument *aDocument,
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nsIContent *aContainer,
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nsIContent *aChild,
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int32_t aIndexInContainer,
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nsIContent *aPreviousSibling)
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{
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if (nsContentUtils::IsInSameAnonymousTree(this, aChild)) {
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TriggerReclone();
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}
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}
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void
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SVGUseElement::NodeWillBeDestroyed(const nsINode *aNode)
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{
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nsCOMPtr<nsIMutationObserver> kungFuDeathGrip(this);
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UnlinkSource();
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}
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//----------------------------------------------------------------------
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nsIContent*
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SVGUseElement::CreateAnonymousContent()
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{
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mClone = nullptr;
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if (mSource.get()) {
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mSource.get()->RemoveMutationObserver(this);
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}
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LookupHref();
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nsIContent* targetContent = mSource.get();
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if (!targetContent || !targetContent->IsSVG())
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return nullptr;
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// make sure target is valid type for <use>
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// QIable nsSVGGraphicsElement would eliminate enumerating all elements
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nsIAtom *tag = targetContent->Tag();
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if (tag != nsGkAtoms::svg &&
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tag != nsGkAtoms::symbol &&
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tag != nsGkAtoms::g &&
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tag != nsGkAtoms::path &&
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tag != nsGkAtoms::text &&
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tag != nsGkAtoms::rect &&
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tag != nsGkAtoms::circle &&
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tag != nsGkAtoms::ellipse &&
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tag != nsGkAtoms::line &&
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tag != nsGkAtoms::polyline &&
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tag != nsGkAtoms::polygon &&
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tag != nsGkAtoms::image &&
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tag != nsGkAtoms::use)
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return nullptr;
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// circular loop detection
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// check 1 - check if we're a document descendent of the target
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if (nsContentUtils::ContentIsDescendantOf(this, targetContent))
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return nullptr;
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// check 2 - check if we're a clone, and if we already exist in the hierarchy
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if (GetParent() && mOriginal) {
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for (nsCOMPtr<nsIContent> content = GetParent();
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content;
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content = content->GetParent()) {
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if (content->IsSVG(nsGkAtoms::use) &&
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static_cast<SVGUseElement*>(content.get())->mOriginal == mOriginal) {
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return nullptr;
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}
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}
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}
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nsCOMPtr<nsINode> newnode;
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nsCOMArray<nsINode> unused;
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nsNodeInfoManager* nodeInfoManager =
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targetContent->OwnerDoc() == OwnerDoc() ?
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nullptr : OwnerDoc()->NodeInfoManager();
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nsNodeUtils::Clone(targetContent, true, nodeInfoManager, unused,
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getter_AddRefs(newnode));
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nsCOMPtr<nsIContent> newcontent = do_QueryInterface(newnode);
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if (!newcontent)
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return nullptr;
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if (newcontent->IsSVG(nsGkAtoms::symbol)) {
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nsIDocument *document = GetComposedDoc();
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if (!document)
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return nullptr;
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nsNodeInfoManager *nodeInfoManager = document->NodeInfoManager();
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if (!nodeInfoManager)
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return nullptr;
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nsRefPtr<mozilla::dom::NodeInfo> nodeInfo;
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nodeInfo = nodeInfoManager->GetNodeInfo(nsGkAtoms::svg, nullptr,
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kNameSpaceID_SVG,
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nsIDOMNode::ELEMENT_NODE);
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nsCOMPtr<nsIContent> svgNode;
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NS_NewSVGSVGElement(getter_AddRefs(svgNode), nodeInfo.forget(),
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NOT_FROM_PARSER);
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if (!svgNode)
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return nullptr;
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// copy attributes
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const nsAttrName* name;
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uint32_t i;
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for (i = 0; (name = newcontent->GetAttrNameAt(i)); i++) {
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nsAutoString value;
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int32_t nsID = name->NamespaceID();
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nsIAtom* lname = name->LocalName();
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newcontent->GetAttr(nsID, lname, value);
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svgNode->SetAttr(nsID, lname, name->GetPrefix(), value, false);
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}
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// move the children over
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uint32_t num = newcontent->GetChildCount();
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for (i = 0; i < num; i++) {
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nsCOMPtr<nsIContent> child = newcontent->GetFirstChild();
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newcontent->RemoveChildAt(0, false);
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svgNode->InsertChildAt(child, i, true);
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}
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newcontent = svgNode;
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}
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if (newcontent->IsSVG() && (newcontent->Tag() == nsGkAtoms::svg ||
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newcontent->Tag() == nsGkAtoms::symbol)) {
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nsSVGElement *newElement = static_cast<nsSVGElement*>(newcontent.get());
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if (mLengthAttributes[ATTR_WIDTH].IsExplicitlySet())
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newElement->SetLength(nsGkAtoms::width, mLengthAttributes[ATTR_WIDTH]);
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if (mLengthAttributes[ATTR_HEIGHT].IsExplicitlySet())
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newElement->SetLength(nsGkAtoms::height, mLengthAttributes[ATTR_HEIGHT]);
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}
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// Set up its base URI correctly
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nsCOMPtr<nsIURI> baseURI = targetContent->GetBaseURI();
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if (!baseURI)
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return nullptr;
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newcontent->SetExplicitBaseURI(baseURI);
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targetContent->AddMutationObserver(this);
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mClone = newcontent;
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return mClone;
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}
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void
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SVGUseElement::DestroyAnonymousContent()
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{
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nsContentUtils::DestroyAnonymousContent(&mClone);
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}
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bool
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SVGUseElement::OurWidthAndHeightAreUsed() const
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{
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return mClone && mClone->IsSVG() && (mClone->Tag() == nsGkAtoms::svg ||
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mClone->Tag() == nsGkAtoms::symbol);
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}
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//----------------------------------------------------------------------
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// implementation helpers
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void
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SVGUseElement::SyncWidthOrHeight(nsIAtom* aName)
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{
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NS_ASSERTION(aName == nsGkAtoms::width || aName == nsGkAtoms::height,
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"The clue is in the function name");
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NS_ASSERTION(OurWidthAndHeightAreUsed(), "Don't call this");
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if (OurWidthAndHeightAreUsed()) {
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nsSVGElement *target = static_cast<nsSVGElement*>(mClone.get());
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uint32_t index = *sLengthInfo[ATTR_WIDTH].mName == aName ? ATTR_WIDTH : ATTR_HEIGHT;
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if (mLengthAttributes[index].IsExplicitlySet()) {
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target->SetLength(aName, mLengthAttributes[index]);
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return;
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}
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if (mClone->Tag() == nsGkAtoms::svg) {
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// Our width/height attribute is now no longer explicitly set, so we
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// need to revert the clone's width/height to the width/height of the
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// content that's being cloned.
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TriggerReclone();
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return;
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}
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// Our width/height attribute is now no longer explicitly set, so we
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// need to set the value to 100%
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nsSVGLength2 length;
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length.Init(SVGContentUtils::XY, 0xff,
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100, nsIDOMSVGLength::SVG_LENGTHTYPE_PERCENTAGE);
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target->SetLength(aName, length);
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return;
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}
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}
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void
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SVGUseElement::LookupHref()
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{
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nsAutoString href;
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mStringAttributes[HREF].GetAnimValue(href, this);
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if (href.IsEmpty())
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return;
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nsCOMPtr<nsIURI> targetURI;
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nsCOMPtr<nsIURI> baseURI = mOriginal ? mOriginal->GetBaseURI() : GetBaseURI();
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nsContentUtils::NewURIWithDocumentCharset(getter_AddRefs(targetURI), href,
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GetComposedDoc(), baseURI);
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mSource.Reset(this, targetURI);
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}
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void
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SVGUseElement::TriggerReclone()
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{
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nsIDocument *doc = GetComposedDoc();
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if (!doc)
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return;
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nsIPresShell *presShell = doc->GetShell();
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if (!presShell)
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return;
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presShell->PostRecreateFramesFor(this);
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}
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void
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SVGUseElement::UnlinkSource()
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{
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if (mSource.get()) {
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mSource.get()->RemoveMutationObserver(this);
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}
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mSource.Unlink();
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}
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//----------------------------------------------------------------------
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// nsSVGElement methods
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/* virtual */ gfxMatrix
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SVGUseElement::PrependLocalTransformsTo(const gfxMatrix &aMatrix,
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TransformTypes aWhich) const
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{
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// 'transform' attribute:
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gfxMatrix fromUserSpace =
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SVGUseElementBase::PrependLocalTransformsTo(aMatrix, aWhich);
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if (aWhich == eUserSpaceToParent) {
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return fromUserSpace;
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}
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// our 'x' and 'y' attributes:
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float x, y;
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const_cast<SVGUseElement*>(this)->GetAnimatedLengthValues(&x, &y, nullptr);
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gfxMatrix toUserSpace = gfxMatrix::Translation(x, y);
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if (aWhich == eChildToUserSpace) {
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return toUserSpace * aMatrix;
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}
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NS_ABORT_IF_FALSE(aWhich == eAllTransforms, "Unknown TransformTypes");
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return toUserSpace * fromUserSpace;
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}
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/* virtual */ bool
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SVGUseElement::HasValidDimensions() const
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{
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return (!mLengthAttributes[ATTR_WIDTH].IsExplicitlySet() ||
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mLengthAttributes[ATTR_WIDTH].GetAnimValInSpecifiedUnits() > 0) &&
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(!mLengthAttributes[ATTR_HEIGHT].IsExplicitlySet() ||
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mLengthAttributes[ATTR_HEIGHT].GetAnimValInSpecifiedUnits() > 0);
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}
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nsSVGElement::LengthAttributesInfo
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SVGUseElement::GetLengthInfo()
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{
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return LengthAttributesInfo(mLengthAttributes, sLengthInfo,
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ArrayLength(sLengthInfo));
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}
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nsSVGElement::StringAttributesInfo
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SVGUseElement::GetStringInfo()
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{
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return StringAttributesInfo(mStringAttributes, sStringInfo,
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ArrayLength(sStringInfo));
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}
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//----------------------------------------------------------------------
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// nsIContent methods
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NS_IMETHODIMP_(bool)
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SVGUseElement::IsAttributeMapped(const nsIAtom* name) const
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{
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static const MappedAttributeEntry* const map[] = {
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sFEFloodMap,
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sFiltersMap,
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sFontSpecificationMap,
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sGradientStopMap,
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sLightingEffectsMap,
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sMarkersMap,
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sTextContentElementsMap,
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sViewportsMap
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};
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return FindAttributeDependence(name, map) ||
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SVGUseElementBase::IsAttributeMapped(name);
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}
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} // namespace dom
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} // namespace mozilla
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