зеркало из https://github.com/mozilla/gecko-dev.git
542 строки
16 KiB
C++
542 строки
16 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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/ErrorResult.h"
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#include "mozilla/dom/SVGUseElement.h"
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#include "mozilla/dom/SVGLengthBinding.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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#include "mozilla/URLExtraData.h"
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#include "SVGObserverUtils.h"
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#include "nsSVGUseFrame.h"
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#include "mozilla/net/ReferrerPolicy.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, JS::Handle<JSObject*> aGivenProto)
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{
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return SVGUseElement_Binding::Wrap(aCx, this, aGivenProto);
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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, SVGLength_Binding::SVG_LENGTHTYPE_NUMBER, SVGContentUtils::X },
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{ &nsGkAtoms::y, 0, SVGLength_Binding::SVG_LENGTHTYPE_NUMBER, SVGContentUtils::Y },
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{ &nsGkAtoms::width, 0, SVGLength_Binding::SVG_LENGTHTYPE_NUMBER, SVGContentUtils::X },
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{ &nsGkAtoms::height, 0, SVGLength_Binding::SVG_LENGTHTYPE_NUMBER, SVGContentUtils::Y },
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};
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nsSVGElement::StringInfo SVGUseElement::sStringInfo[2] =
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{
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{ &nsGkAtoms::href, kNameSpaceID_None, true },
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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->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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tmp->mReferencedElementTracker.Traverse(&cb);
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
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NS_IMPL_ISUPPORTS_CYCLE_COLLECTION_INHERITED(SVGUseElement,
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SVGUseElementBase,
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nsIMutationObserver)
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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)
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, mReferencedElementTracker(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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MOZ_DIAGNOSTIC_ASSERT(
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!OwnerDoc()->SVGUseElementNeedsShadowTreeUpdate(*this),
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"Dying without unbinding?"
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);
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}
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//----------------------------------------------------------------------
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// nsINode methods
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nsresult
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SVGUseElement::Clone(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 = RefPtr<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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nsresult
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SVGUseElement::BindToTree(nsIDocument* aDocument,
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nsIContent* aParent,
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nsIContent* aBindingParent)
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{
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nsresult rv = SVGUseElementBase::BindToTree(aDocument, aParent, aBindingParent);
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NS_ENSURE_SUCCESS(rv, rv);
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TriggerReclone();
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return NS_OK;
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}
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void
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SVGUseElement::UnbindFromTree(bool aDeep, bool aNullParent)
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{
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SVGUseElementBase::UnbindFromTree(aDeep, aNullParent);
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OwnerDoc()->UnscheduleSVGUseElementShadowTreeUpdate(*this);
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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].IsExplicitlySet()
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? mStringAttributes[HREF].ToDOMAnimatedString(this)
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: mStringAttributes[XLINK_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(nsIContent* aContent,
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const CharacterDataChangeInfo&)
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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(Element* aElement,
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int32_t aNameSpaceID,
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nsAtom* aAttribute,
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int32_t aModType,
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const nsAttrValue* aOldValue)
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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(nsIContent* aFirstNewContent)
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{
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// FIXME(emilio, bug 1442336): Why does this check the parent but
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// ContentInserted the child?
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if (nsContentUtils::IsInSameAnonymousTree(this, aFirstNewContent->GetParent())) {
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TriggerReclone();
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}
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}
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void
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SVGUseElement::ContentInserted(nsIContent* aChild)
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{
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// FIXME(emilio, bug 1442336): Why does this check the child but
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// ContentAppended the parent?
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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(nsIContent* aChild, 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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void
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SVGUseElement::UpdateShadowTree()
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{
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MOZ_ASSERT(IsInComposedDoc());
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if (mReferencedElementTracker.get()) {
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mReferencedElementTracker.get()->RemoveMutationObserver(this);
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}
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LookupHref();
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RefPtr<ShadowRoot> shadow = GetShadowRoot();
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if (!shadow) {
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shadow = AttachShadowWithoutNameChecks(ShadowRootMode::Closed);
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}
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MOZ_ASSERT(shadow);
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Element* targetElement = mReferencedElementTracker.get();
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RefPtr<Element> newElement;
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auto UpdateShadowTree = mozilla::MakeScopeExit([&]() {
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nsIContent* firstChild = shadow->GetFirstChild();
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if (firstChild) {
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MOZ_ASSERT(!firstChild->GetNextSibling());
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shadow->RemoveChildNode(firstChild, /* aNotify = */ true);
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}
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if (newElement) {
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shadow->AppendChildTo(newElement, /* aNotify = */ true);
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}
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});
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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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if (!targetElement ||
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!targetElement->IsAnyOfSVGElements(nsGkAtoms::svg,
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nsGkAtoms::symbol,
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nsGkAtoms::g,
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nsGkAtoms::path,
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nsGkAtoms::text,
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nsGkAtoms::rect,
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nsGkAtoms::circle,
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nsGkAtoms::ellipse,
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nsGkAtoms::line,
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nsGkAtoms::polyline,
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nsGkAtoms::polygon,
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nsGkAtoms::image,
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nsGkAtoms::use)) {
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return;
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}
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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::ContentIsShadowIncludingDescendantOf(this, targetElement)) {
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return;
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}
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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 (mOriginal) {
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for (nsINode* parent = GetParentOrHostNode();
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parent;
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parent = parent->GetParentOrHostNode()) {
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SVGUseElement* use = SVGUseElement::FromNode(*parent);
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if (use && use->mOriginal == mOriginal) {
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return;
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}
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}
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}
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nsCOMPtr<nsIURI> baseURI = targetElement->GetBaseURI();
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if (!baseURI) {
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return;
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}
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{
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nsNodeInfoManager* nodeInfoManager =
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targetElement->OwnerDoc() == OwnerDoc()
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? nullptr
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: OwnerDoc()->NodeInfoManager();
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nsCOMPtr<nsINode> newNode =
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nsNodeUtils::Clone(targetElement, true, nodeInfoManager, nullptr,
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IgnoreErrors());
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if (!newNode) {
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return;
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}
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MOZ_ASSERT(newNode->IsElement());
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newElement = newNode.forget().downcast<Element>();
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}
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if (newElement->IsAnyOfSVGElements(nsGkAtoms::svg, nsGkAtoms::symbol)) {
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auto* newSVGElement = static_cast<nsSVGElement*>(newElement.get());
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if (mLengthAttributes[ATTR_WIDTH].IsExplicitlySet())
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newSVGElement->SetLength(nsGkAtoms::width, mLengthAttributes[ATTR_WIDTH]);
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if (mLengthAttributes[ATTR_HEIGHT].IsExplicitlySet())
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newSVGElement->SetLength(nsGkAtoms::height, mLengthAttributes[ATTR_HEIGHT]);
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}
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// The specs do not say which referrer policy we should use, pass RP_Unset for
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// now
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mContentURLData = new URLExtraData(baseURI.forget(),
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do_AddRef(OwnerDoc()->GetDocumentURI()),
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do_AddRef(NodePrincipal()),
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mozilla::net::RP_Unset);
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targetElement->AddMutationObserver(this);
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}
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nsIURI*
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SVGUseElement::GetSourceDocURI()
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{
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nsIContent* targetElement = mReferencedElementTracker.get();
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if (!targetElement) {
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return nullptr;
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}
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return targetElement->OwnerDoc()->GetDocumentURI();
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}
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static nsINode*
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GetClonedChild(const SVGUseElement& aUseElement)
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{
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const ShadowRoot* shadow = aUseElement.GetShadowRoot();
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return shadow ? shadow->GetFirstChild() : nullptr;
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}
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bool
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SVGUseElement::OurWidthAndHeightAreUsed() const
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{
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nsINode* clonedChild = GetClonedChild(*this);
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return clonedChild &&
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clonedChild->IsAnyOfSVGElements(nsGkAtoms::svg, 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(nsAtom* 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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return;
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}
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auto* target = nsSVGElement::FromNode(GetClonedChild(*this));
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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 (target->IsSVGElement(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, SVGLength_Binding::SVG_LENGTHTYPE_PERCENTAGE);
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target->SetLength(aName, length);
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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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if (mStringAttributes[HREF].IsExplicitlySet()) {
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mStringAttributes[HREF].GetAnimValue(href, this);
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} else {
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mStringAttributes[XLINK_HREF].GetAnimValue(href, this);
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}
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if (href.IsEmpty()) {
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return;
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}
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nsCOMPtr<nsIURI> originURI =
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mOriginal ? mOriginal->GetBaseURI() : GetBaseURI();
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nsCOMPtr<nsIURI> baseURI = nsContentUtils::IsLocalRefURL(href)
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? SVGObserverUtils::GetBaseURLForLocalRef(this, originURI)
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: originURI;
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nsCOMPtr<nsIURI> targetURI;
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nsContentUtils::NewURIWithDocumentCharset(getter_AddRefs(targetURI), href,
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GetComposedDoc(), baseURI);
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// Bug 1415044 to investigate which referrer we should use
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mReferencedElementTracker.Reset(this, targetURI,
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OwnerDoc()->GetDocumentURI(),
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OwnerDoc()->GetReferrerPolicy());
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}
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void
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SVGUseElement::TriggerReclone()
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{
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if (nsIDocument* doc = GetComposedDoc()) {
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doc->ScheduleSVGUseElementShadowTreeUpdate(*this);
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}
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}
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void
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SVGUseElement::UnlinkSource()
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{
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if (mReferencedElementTracker.get()) {
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mReferencedElementTracker.get()->RemoveMutationObserver(this);
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}
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mReferencedElementTracker.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(
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const gfxMatrix &aMatrix, SVGTransformTypes aWhich) const
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{
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// 'transform' attribute:
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gfxMatrix userToParent;
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if (aWhich == eUserSpaceToParent || aWhich == eAllTransforms) {
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userToParent = GetUserToParentTransform(mAnimateMotionTransform,
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mTransforms);
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if (aWhich == eUserSpaceToParent) {
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return userToParent * aMatrix;
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}
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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 childToUser = gfxMatrix::Translation(x, y);
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if (aWhich == eAllTransforms) {
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return childToUser * userToParent * aMatrix;
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}
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MOZ_ASSERT(aWhich == eChildToUserSpace, "Unknown TransformTypes");
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// The following may look broken because pre-multiplying our eChildToUserSpace
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// transform with another matrix without including our eUserSpaceToParent
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// transform between the two wouldn't make sense. We don't expect that to
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// ever happen though. We get here either when the identity matrix has been
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// passed because our caller just wants our eChildToUserSpace transform, or
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// when our eUserSpaceToParent transform has already been multiplied into the
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// matrix that our caller passes (such as when we're called from PaintSVG).
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return childToUser * aMatrix;
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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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nsSVGUseFrame*
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SVGUseElement::GetFrame() const
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{
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nsIFrame* frame = GetPrimaryFrame();
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MOZ_ASSERT_IF(frame, frame->IsSVGUseFrame());
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return static_cast<nsSVGUseFrame*>(frame);
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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 nsAtom* name) const
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{
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static const MappedAttributeEntry* const map[] = {
|
|
sFEFloodMap,
|
|
sFiltersMap,
|
|
sFontSpecificationMap,
|
|
sGradientStopMap,
|
|
sLightingEffectsMap,
|
|
sMarkersMap,
|
|
sTextContentElementsMap,
|
|
sViewportsMap
|
|
};
|
|
|
|
return FindAttributeDependence(name, map) ||
|
|
SVGUseElementBase::IsAttributeMapped(name);
|
|
}
|
|
|
|
} // namespace dom
|
|
} // namespace mozilla
|