зеркало из https://github.com/mozilla/gecko-dev.git
2998 строки
93 KiB
C++
2998 строки
93 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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/*
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* Base class for all DOM nodes.
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*/
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#include "nsINode.h"
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#include "AccessCheck.h"
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#include "jsapi.h"
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#include "js/JSON.h"
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#include "mozAutoDocUpdate.h"
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#include "mozilla/AsyncEventDispatcher.h"
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#include "mozilla/CORSMode.h"
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#include "mozilla/EventDispatcher.h"
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#include "mozilla/EventListenerManager.h"
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#include "mozilla/HTMLEditor.h"
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#include "mozilla/InternalMutationEvent.h"
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#include "mozilla/Likely.h"
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#include "mozilla/MemoryReporting.h"
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#include "mozilla/ServoBindings.h"
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#include "mozilla/Telemetry.h"
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#include "mozilla/TextEditor.h"
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#include "mozilla/TimeStamp.h"
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#include "mozilla/dom/CharacterData.h"
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#include "mozilla/dom/DocumentType.h"
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#include "mozilla/dom/Element.h"
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#include "mozilla/dom/Event.h"
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#include "mozilla/dom/L10nUtilsBinding.h"
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#include "mozilla/dom/Promise.h"
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#include "mozilla/dom/PromiseNativeHandler.h"
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#include "mozilla/dom/ShadowRoot.h"
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#include "mozilla/dom/SVGUseElement.h"
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#include "mozilla/dom/ScriptSettings.h"
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#include "nsAttrValueOrString.h"
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#include "nsBindingManager.h"
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#include "nsCCUncollectableMarker.h"
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#include "nsContentCreatorFunctions.h"
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#include "nsContentList.h"
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#include "nsContentUtils.h"
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#include "nsCycleCollectionParticipant.h"
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#include "mozilla/dom/Attr.h"
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#include "nsDOMAttributeMap.h"
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#include "nsDOMCID.h"
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#include "nsDOMCSSAttrDeclaration.h"
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#include "nsError.h"
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#include "nsDOMMutationObserver.h"
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#include "nsDOMString.h"
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#include "nsDOMTokenList.h"
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#include "nsFocusManager.h"
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#include "nsFrameSelection.h"
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#include "nsGenericHTMLElement.h"
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#include "nsGkAtoms.h"
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#include "nsIAnonymousContentCreator.h"
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#include "nsAtom.h"
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#include "nsIBaseWindow.h"
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#include "nsICategoryManager.h"
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#include "nsIContentInlines.h"
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#include "nsIControllers.h"
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#include "mozilla/dom/Document.h"
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#include "nsIDOMEventListener.h"
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#include "nsIFrameInlines.h"
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#include "nsILinkHandler.h"
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#include "mozilla/dom/NodeInfo.h"
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#include "mozilla/dom/NodeInfoInlines.h"
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#include "nsIPresShell.h"
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#include "nsIScriptError.h"
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#include "nsIScriptGlobalObject.h"
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#include "nsIScriptSecurityManager.h"
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#include "nsIScrollableFrame.h"
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#include "nsIServiceManager.h"
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#include "nsIURL.h"
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#include "nsView.h"
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#include "nsViewManager.h"
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#include "nsIWebNavigation.h"
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#include "nsIWidget.h"
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#include "nsLayoutUtils.h"
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#include "nsNameSpaceManager.h"
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#include "nsNodeInfoManager.h"
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#include "nsNodeUtils.h"
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#include "nsPIBoxObject.h"
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#include "nsPIDOMWindow.h"
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#include "nsPresContext.h"
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#include "nsString.h"
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#include "nsStyleConsts.h"
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#include "nsSVGUtils.h"
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#include "nsTextNode.h"
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#include "nsUnicharUtils.h"
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#include "nsXBLBinding.h"
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#include "nsXBLPrototypeBinding.h"
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#include "nsWindowSizes.h"
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#include "mozilla/Preferences.h"
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#include "xpcpublic.h"
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#include "HTMLLegendElement.h"
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#include "nsWrapperCacheInlines.h"
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#include "WrapperFactory.h"
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#include <algorithm>
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#include "nsGlobalWindow.h"
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#include "nsDOMMutationObserver.h"
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#include "GeometryUtils.h"
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#include "nsIAnimationObserver.h"
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#include "nsChildContentList.h"
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#include "mozilla/dom/NodeBinding.h"
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#include "mozilla/dom/BindingDeclarations.h"
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#include "xpcprivate.h"
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#include "XPathGenerator.h"
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#ifdef ACCESSIBILITY
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# include "mozilla/dom/AccessibleNode.h"
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#endif
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using namespace mozilla;
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using namespace mozilla::dom;
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nsINode::nsSlots::nsSlots() : mWeakReference(nullptr) {}
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nsINode::nsSlots::~nsSlots() {
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if (mChildNodes) {
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mChildNodes->DropReference();
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}
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if (mWeakReference) {
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mWeakReference->NoticeNodeDestruction();
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}
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}
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void nsINode::nsSlots::Traverse(nsCycleCollectionTraversalCallback& cb) {
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NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mSlots->mChildNodes");
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cb.NoteXPCOMChild(mChildNodes);
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}
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void nsINode::nsSlots::Unlink() {
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if (mChildNodes) {
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mChildNodes->DropReference();
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}
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}
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//----------------------------------------------------------------------
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#ifdef MOZILLA_INTERNAL_API
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nsINode::nsINode(already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)
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: mNodeInfo(std::move(aNodeInfo)),
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mParent(nullptr)
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# ifndef BOOL_FLAGS_ON_WRAPPER_CACHE
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,
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mBoolFlags(0)
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# endif
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,
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mChildCount(0),
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mPreviousOrLastSibling(nullptr),
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mSubtreeRoot(this),
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mSlots(nullptr) {
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}
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#endif
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nsINode::~nsINode() {
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MOZ_ASSERT(!HasSlots(), "nsNodeUtils::LastRelease was not called?");
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MOZ_ASSERT(mSubtreeRoot == this, "Didn't restore state properly?");
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}
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void* nsINode::GetProperty(const nsAtom* aPropertyName,
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nsresult* aStatus) const {
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if (!HasProperties()) { // a fast HasFlag() test
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if (aStatus) {
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*aStatus = NS_PROPTABLE_PROP_NOT_THERE;
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}
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return nullptr;
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}
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return OwnerDoc()->PropertyTable().GetProperty(this, aPropertyName, aStatus);
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}
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nsresult nsINode::SetProperty(nsAtom* aPropertyName, void* aValue,
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NSPropertyDtorFunc aDtor, bool aTransfer) {
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nsresult rv = OwnerDoc()->PropertyTable().SetProperty(
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this, aPropertyName, aValue, aDtor, nullptr, aTransfer);
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if (NS_SUCCEEDED(rv)) {
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SetFlags(NODE_HAS_PROPERTIES);
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}
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return rv;
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}
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void nsINode::DeleteProperty(const nsAtom* aPropertyName) {
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OwnerDoc()->PropertyTable().DeleteProperty(this, aPropertyName);
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}
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void* nsINode::UnsetProperty(const nsAtom* aPropertyName, nsresult* aStatus) {
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return OwnerDoc()->PropertyTable().UnsetProperty(this, aPropertyName,
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aStatus);
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}
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nsINode::nsSlots* nsINode::CreateSlots() { return new nsSlots(); }
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nsIContent* nsINode::GetTextEditorRootContent(TextEditor** aTextEditor) {
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if (aTextEditor) {
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*aTextEditor = nullptr;
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}
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for (nsINode* node = this; node; node = node->GetParentNode()) {
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if (!node->IsElement() || !node->IsHTMLElement()) continue;
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RefPtr<TextEditor> textEditor =
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static_cast<nsGenericHTMLElement*>(node)->GetTextEditorInternal();
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if (!textEditor) {
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continue;
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}
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MOZ_ASSERT(!textEditor->AsHTMLEditor(),
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"If it were an HTML editor, needs to use GetRootElement()");
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Element* rootElement = textEditor->GetRoot();
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if (aTextEditor) {
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textEditor.forget(aTextEditor);
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}
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return rootElement;
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}
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return nullptr;
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}
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nsINode* nsINode::GetRootNode(const GetRootNodeOptions& aOptions) {
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if (aOptions.mComposed) {
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if (Document* doc = GetComposedDoc()) {
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return doc;
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}
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nsINode* node = this;
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while (node) {
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node = node->SubtreeRoot();
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ShadowRoot* shadow = ShadowRoot::FromNode(node);
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if (!shadow) {
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break;
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}
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node = shadow->GetHost();
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}
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return node;
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}
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return SubtreeRoot();
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}
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nsINode* nsINode::GetParentOrHostNode() const {
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if (mParent) {
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return mParent;
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}
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const ShadowRoot* shadowRoot = ShadowRoot::FromNode(this);
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return shadowRoot ? shadowRoot->GetHost() : nullptr;
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}
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nsINode* nsINode::SubtreeRoot() const {
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auto RootOfNode = [](const nsINode* aStart) -> nsINode* {
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const nsINode* node = aStart;
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const nsINode* iter = node;
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while ((iter = iter->GetParentNode())) {
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node = iter;
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}
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return const_cast<nsINode*>(node);
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};
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// There are four cases of interest here. nsINodes that are really:
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// 1. Document nodes - Are always in the document.
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// 2.a nsIContent nodes not in a shadow tree - Are either in the document,
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// or mSubtreeRoot is updated in BindToTree/UnbindFromTree.
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// 2.b nsIContent nodes in a shadow tree - Are never in the document,
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// ignore mSubtreeRoot and return the containing shadow root.
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// 4. Attr nodes - Are never in the document, and mSubtreeRoot
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// is always 'this' (as set in nsINode's ctor).
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nsINode* node;
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if (IsInUncomposedDoc()) {
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node = OwnerDocAsNode();
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} else if (IsContent()) {
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ShadowRoot* containingShadow = AsContent()->GetContainingShadow();
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node = containingShadow ? containingShadow : mSubtreeRoot;
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if (!node) {
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NS_WARNING("Using SubtreeRoot() on unlinked element?");
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node = RootOfNode(this);
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}
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} else {
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node = mSubtreeRoot;
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}
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MOZ_ASSERT(node, "Should always have a node here!");
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#ifdef DEBUG
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{
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const nsINode* slowNode = RootOfNode(this);
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MOZ_ASSERT(slowNode == node, "These should always be in sync!");
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}
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#endif
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return node;
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}
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static nsIContent* GetRootForContentSubtree(nsIContent* aContent) {
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NS_ENSURE_TRUE(aContent, nullptr);
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// Special case for ShadowRoot because the ShadowRoot itself is
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// the root. This is necessary to prevent selection from crossing
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// the ShadowRoot boundary.
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ShadowRoot* containingShadow = aContent->GetContainingShadow();
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if (containingShadow) {
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return containingShadow;
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}
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nsIContent* stop = aContent->GetBindingParent();
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while (aContent) {
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nsIContent* parent = aContent->GetParent();
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if (parent == stop) {
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break;
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}
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aContent = parent;
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}
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return aContent;
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}
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nsIContent* nsINode::GetSelectionRootContent(nsIPresShell* aPresShell) {
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NS_ENSURE_TRUE(aPresShell, nullptr);
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if (IsDocument()) return AsDocument()->GetRootElement();
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if (!IsContent()) return nullptr;
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if (GetComposedDoc() != aPresShell->GetDocument()) {
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return nullptr;
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}
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if (static_cast<nsIContent*>(this)->HasIndependentSelection()) {
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// This node should be a descendant of input/textarea editor.
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nsIContent* content = GetTextEditorRootContent();
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if (content) return content;
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}
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nsPresContext* presContext = aPresShell->GetPresContext();
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if (presContext) {
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HTMLEditor* htmlEditor = nsContentUtils::GetHTMLEditor(presContext);
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if (htmlEditor) {
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// This node is in HTML editor.
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Document* doc = GetComposedDoc();
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if (!doc || doc->HasFlag(NODE_IS_EDITABLE) ||
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!HasFlag(NODE_IS_EDITABLE)) {
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nsIContent* editorRoot = htmlEditor->GetRoot();
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NS_ENSURE_TRUE(editorRoot, nullptr);
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return nsContentUtils::IsInSameAnonymousTree(this, editorRoot)
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? editorRoot
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: GetRootForContentSubtree(static_cast<nsIContent*>(this));
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}
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// If the document isn't editable but this is editable, this is in
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// contenteditable. Use the editing host element for selection root.
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return static_cast<nsIContent*>(this)->GetEditingHost();
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}
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}
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RefPtr<nsFrameSelection> fs = aPresShell->FrameSelection();
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nsIContent* content = fs->GetLimiter();
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if (!content) {
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content = fs->GetAncestorLimiter();
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if (!content) {
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Document* doc = aPresShell->GetDocument();
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NS_ENSURE_TRUE(doc, nullptr);
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content = doc->GetRootElement();
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if (!content) return nullptr;
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}
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}
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// This node might be in another subtree, if so, we should find this subtree's
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// root. Otherwise, we can return the content simply.
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NS_ENSURE_TRUE(content, nullptr);
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if (!nsContentUtils::IsInSameAnonymousTree(this, content)) {
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content = GetRootForContentSubtree(static_cast<nsIContent*>(this));
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// Fixup for ShadowRoot because the ShadowRoot itself does not have a frame.
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// Use the host as the root.
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if (ShadowRoot* shadowRoot = ShadowRoot::FromNode(content)) {
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content = shadowRoot->GetHost();
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}
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}
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return content;
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}
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nsINodeList* nsINode::ChildNodes() {
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nsSlots* slots = Slots();
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if (!slots->mChildNodes) {
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slots->mChildNodes = IsAttr() ? new nsAttrChildContentList(this)
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: new nsParentNodeChildContentList(this);
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}
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return slots->mChildNodes;
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}
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nsIContent* nsINode::GetLastChild() const {
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return mFirstChild ? mFirstChild->mPreviousOrLastSibling : nullptr;
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}
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void nsINode::InvalidateChildNodes() {
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MOZ_ASSERT(!IsAttr());
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nsSlots* slots = GetExistingSlots();
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if (!slots || !slots->mChildNodes) {
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return;
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}
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auto childNodes =
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static_cast<nsParentNodeChildContentList*>(slots->mChildNodes.get());
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childNodes->InvalidateCache();
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}
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void nsINode::GetTextContentInternal(nsAString& aTextContent,
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OOMReporter& aError) {
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SetDOMStringToNull(aTextContent);
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}
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DocumentOrShadowRoot* nsINode::GetUncomposedDocOrConnectedShadowRoot() const {
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if (IsInUncomposedDoc()) {
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return OwnerDoc();
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}
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if (IsInComposedDoc() && IsInShadowTree()) {
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return AsContent()->GetContainingShadow();
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}
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return nullptr;
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}
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#ifdef DEBUG
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void nsINode::CheckNotNativeAnonymous() const {
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if (!IsContent()) return;
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nsIContent* content =
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static_cast<const nsIContent*>(this)->GetBindingParent();
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while (content) {
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if (content->IsRootOfNativeAnonymousSubtree()) {
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NS_ERROR("Element not marked to be in native anonymous subtree!");
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break;
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}
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content = content->GetBindingParent();
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}
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}
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#endif
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bool nsINode::IsInAnonymousSubtree() const {
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if (!IsContent()) {
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return false;
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}
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return AsContent()->IsInAnonymousSubtree();
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}
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std::ostream& operator<<(std::ostream& aStream, const nsINode& aNode) {
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nsAutoString elemDesc;
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const nsINode* curr = &aNode;
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while (curr) {
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const nsString& localName = curr->LocalName();
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nsString id;
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if (curr->IsElement()) {
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curr->AsElement()->GetId(id);
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}
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if (!elemDesc.IsEmpty()) {
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elemDesc = elemDesc + NS_LITERAL_STRING(".");
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}
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elemDesc = elemDesc + localName;
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if (!id.IsEmpty()) {
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elemDesc =
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elemDesc + NS_LITERAL_STRING("['") + id + NS_LITERAL_STRING("']");
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}
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curr = curr->GetParentNode();
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}
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NS_ConvertUTF16toUTF8 str(elemDesc);
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return aStream << str.get();
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}
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SVGUseElement* nsINode::DoGetContainingSVGUseShadowHost() const {
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MOZ_ASSERT(IsInShadowTree());
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return SVGUseElement::FromNodeOrNull(AsContent()->GetContainingShadowHost());
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}
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bool nsINode::IsInUAWidget() const {
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if (!IsInShadowTree()) {
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return false;
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}
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ShadowRoot* shadowRoot = AsContent()->GetContainingShadow();
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return shadowRoot && shadowRoot->IsUAWidget();
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}
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void nsINode::GetNodeValueInternal(nsAString& aNodeValue) {
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SetDOMStringToNull(aNodeValue);
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}
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nsINode* nsINode::RemoveChild(nsINode& aOldChild, ErrorResult& aError) {
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if (!aOldChild.IsContent()) {
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// aOldChild can't be one of our children.
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aError.Throw(NS_ERROR_DOM_NOT_FOUND_ERR);
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return nullptr;
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}
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if (aOldChild.GetParentNode() == this) {
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nsContentUtils::MaybeFireNodeRemoved(&aOldChild, this);
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}
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// Check again, we may not be the child's parent anymore.
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// Can be triggered by dom/base/crashtests/293388-1.html
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if (aOldChild.AsContent()->IsRootOfAnonymousSubtree() ||
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aOldChild.GetParentNode() != this) {
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// aOldChild isn't one of our children.
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aError.Throw(NS_ERROR_DOM_NOT_FOUND_ERR);
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return nullptr;
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}
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|
RemoveChildNode(aOldChild.AsContent(), true);
|
|
return &aOldChild;
|
|
}
|
|
|
|
void nsINode::Normalize() {
|
|
// First collect list of nodes to be removed
|
|
AutoTArray<nsCOMPtr<nsIContent>, 50> nodes;
|
|
|
|
bool canMerge = false;
|
|
for (nsIContent* node = this->GetFirstChild(); node;
|
|
node = node->GetNextNode(this)) {
|
|
if (node->NodeType() != TEXT_NODE) {
|
|
canMerge = false;
|
|
continue;
|
|
}
|
|
|
|
if (canMerge || node->TextLength() == 0) {
|
|
// No need to touch canMerge. That way we can merge across empty
|
|
// textnodes if and only if the node before is a textnode
|
|
nodes.AppendElement(node);
|
|
} else {
|
|
canMerge = true;
|
|
}
|
|
|
|
// If there's no following sibling, then we need to ensure that we don't
|
|
// collect following siblings of our (grand)parent as to-be-removed
|
|
canMerge = canMerge && !!node->GetNextSibling();
|
|
}
|
|
|
|
if (nodes.IsEmpty()) {
|
|
return;
|
|
}
|
|
|
|
// We're relying on mozAutoSubtreeModified to keep the doc alive here.
|
|
Document* doc = OwnerDoc();
|
|
|
|
// Batch possible DOMSubtreeModified events.
|
|
mozAutoSubtreeModified subtree(doc, nullptr);
|
|
|
|
// Fire all DOMNodeRemoved events. Optimize the common case of there being
|
|
// no listeners
|
|
bool hasRemoveListeners = nsContentUtils::HasMutationListeners(
|
|
doc, NS_EVENT_BITS_MUTATION_NODEREMOVED);
|
|
if (hasRemoveListeners) {
|
|
for (uint32_t i = 0; i < nodes.Length(); ++i) {
|
|
nsINode* parentNode = nodes[i]->GetParentNode();
|
|
if (parentNode) { // Node may have already been removed.
|
|
nsContentUtils::MaybeFireNodeRemoved(nodes[i], parentNode);
|
|
}
|
|
}
|
|
}
|
|
|
|
mozAutoDocUpdate batch(doc, true);
|
|
|
|
// Merge and remove all nodes
|
|
nsAutoString tmpStr;
|
|
for (uint32_t i = 0; i < nodes.Length(); ++i) {
|
|
nsIContent* node = nodes[i];
|
|
// Merge with previous node unless empty
|
|
const nsTextFragment* text = node->GetText();
|
|
if (text->GetLength()) {
|
|
nsIContent* target = node->GetPreviousSibling();
|
|
NS_ASSERTION(
|
|
(target && target->NodeType() == TEXT_NODE) || hasRemoveListeners,
|
|
"Should always have a previous text sibling unless "
|
|
"mutation events messed us up");
|
|
if (!hasRemoveListeners || (target && target->NodeType() == TEXT_NODE)) {
|
|
nsTextNode* t = static_cast<nsTextNode*>(target);
|
|
if (text->Is2b()) {
|
|
t->AppendTextForNormalize(text->Get2b(), text->GetLength(), true,
|
|
node);
|
|
} else {
|
|
tmpStr.Truncate();
|
|
text->AppendTo(tmpStr);
|
|
t->AppendTextForNormalize(tmpStr.get(), tmpStr.Length(), true, node);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Remove node
|
|
nsCOMPtr<nsINode> parent = node->GetParentNode();
|
|
NS_ASSERTION(parent || hasRemoveListeners,
|
|
"Should always have a parent unless "
|
|
"mutation events messed us up");
|
|
if (parent) {
|
|
parent->RemoveChildNode(node, true);
|
|
}
|
|
}
|
|
}
|
|
|
|
nsresult nsINode::GetBaseURI(nsAString& aURI) const {
|
|
nsCOMPtr<nsIURI> baseURI = GetBaseURI();
|
|
|
|
nsAutoCString spec;
|
|
if (baseURI) {
|
|
nsresult rv = baseURI->GetSpec(spec);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
|
|
CopyUTF8toUTF16(spec, aURI);
|
|
return NS_OK;
|
|
}
|
|
|
|
void nsINode::GetBaseURIFromJS(nsAString& aURI, CallerType aCallerType,
|
|
ErrorResult& aRv) const {
|
|
nsCOMPtr<nsIURI> baseURI = GetBaseURI(aCallerType == CallerType::System);
|
|
nsAutoCString spec;
|
|
if (baseURI) {
|
|
nsresult res = baseURI->GetSpec(spec);
|
|
if (NS_FAILED(res)) {
|
|
aRv.Throw(res);
|
|
return;
|
|
}
|
|
}
|
|
CopyUTF8toUTF16(spec, aURI);
|
|
}
|
|
|
|
already_AddRefed<nsIURI> nsINode::GetBaseURIObject() const {
|
|
return GetBaseURI(true);
|
|
}
|
|
|
|
void nsINode::LookupPrefix(const nsAString& aNamespaceURI, nsAString& aPrefix) {
|
|
Element* element = GetNameSpaceElement();
|
|
if (element) {
|
|
// XXX Waiting for DOM spec to list error codes.
|
|
|
|
// Trace up the content parent chain looking for the namespace
|
|
// declaration that defines the aNamespaceURI namespace. Once found,
|
|
// return the prefix (i.e. the attribute localName).
|
|
for (nsIContent* content = element; content;
|
|
content = content->GetParent()) {
|
|
if (!content->IsElement()) {
|
|
continue;
|
|
}
|
|
|
|
Element* element = content->AsElement();
|
|
uint32_t attrCount = element->GetAttrCount();
|
|
|
|
for (uint32_t i = 0; i < attrCount; ++i) {
|
|
const nsAttrName* name = element->GetAttrNameAt(i);
|
|
|
|
if (name->NamespaceEquals(kNameSpaceID_XMLNS) &&
|
|
element->AttrValueIs(kNameSpaceID_XMLNS, name->LocalName(),
|
|
aNamespaceURI, eCaseMatters)) {
|
|
// If the localName is "xmlns", the prefix we output should be
|
|
// null.
|
|
nsAtom* localName = name->LocalName();
|
|
|
|
if (localName != nsGkAtoms::xmlns) {
|
|
localName->ToString(aPrefix);
|
|
} else {
|
|
SetDOMStringToNull(aPrefix);
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
SetDOMStringToNull(aPrefix);
|
|
}
|
|
|
|
uint16_t nsINode::CompareDocumentPosition(nsINode& aOtherNode,
|
|
int32_t* aThisIndex,
|
|
int32_t* aOtherIndex) const {
|
|
if (this == &aOtherNode) {
|
|
return 0;
|
|
}
|
|
if (GetPreviousSibling() == &aOtherNode) {
|
|
MOZ_ASSERT(GetParentNode() == aOtherNode.GetParentNode());
|
|
return Node_Binding::DOCUMENT_POSITION_PRECEDING;
|
|
}
|
|
if (GetNextSibling() == &aOtherNode) {
|
|
MOZ_ASSERT(GetParentNode() == aOtherNode.GetParentNode());
|
|
return Node_Binding::DOCUMENT_POSITION_FOLLOWING;
|
|
}
|
|
|
|
AutoTArray<const nsINode*, 32> parents1, parents2;
|
|
|
|
const nsINode* node1 = &aOtherNode;
|
|
const nsINode* node2 = this;
|
|
|
|
// Check if either node is an attribute
|
|
const Attr* attr1 = Attr::FromNode(node1);
|
|
if (attr1) {
|
|
const Element* elem = attr1->GetElement();
|
|
// If there is an owner element add the attribute
|
|
// to the chain and walk up to the element
|
|
if (elem) {
|
|
node1 = elem;
|
|
parents1.AppendElement(attr1);
|
|
}
|
|
}
|
|
if (auto* attr2 = Attr::FromNode(node2)) {
|
|
const Element* elem = attr2->GetElement();
|
|
if (elem == node1 && attr1) {
|
|
// Both nodes are attributes on the same element.
|
|
// Compare position between the attributes.
|
|
|
|
uint32_t i;
|
|
const nsAttrName* attrName;
|
|
for (i = 0; (attrName = elem->GetAttrNameAt(i)); ++i) {
|
|
if (attrName->Equals(attr1->NodeInfo())) {
|
|
NS_ASSERTION(!attrName->Equals(attr2->NodeInfo()),
|
|
"Different attrs at same position");
|
|
return Node_Binding::DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC |
|
|
Node_Binding::DOCUMENT_POSITION_PRECEDING;
|
|
}
|
|
if (attrName->Equals(attr2->NodeInfo())) {
|
|
return Node_Binding::DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC |
|
|
Node_Binding::DOCUMENT_POSITION_FOLLOWING;
|
|
}
|
|
}
|
|
MOZ_ASSERT_UNREACHABLE("neither attribute in the element");
|
|
return Node_Binding::DOCUMENT_POSITION_DISCONNECTED;
|
|
}
|
|
|
|
if (elem) {
|
|
node2 = elem;
|
|
parents2.AppendElement(attr2);
|
|
}
|
|
}
|
|
|
|
// We now know that both nodes are either nsIContents or Documents.
|
|
// If either node started out as an attribute, that attribute will have
|
|
// the same relative position as its ownerElement, except if the
|
|
// ownerElement ends up being the container for the other node
|
|
|
|
// Build the chain of parents
|
|
do {
|
|
parents1.AppendElement(node1);
|
|
node1 = node1->GetParentNode();
|
|
} while (node1);
|
|
do {
|
|
parents2.AppendElement(node2);
|
|
node2 = node2->GetParentNode();
|
|
} while (node2);
|
|
|
|
// Check if the nodes are disconnected.
|
|
uint32_t pos1 = parents1.Length();
|
|
uint32_t pos2 = parents2.Length();
|
|
const nsINode* top1 = parents1.ElementAt(--pos1);
|
|
const nsINode* top2 = parents2.ElementAt(--pos2);
|
|
if (top1 != top2) {
|
|
return top1 < top2
|
|
? (Node_Binding::DOCUMENT_POSITION_PRECEDING |
|
|
Node_Binding::DOCUMENT_POSITION_DISCONNECTED |
|
|
Node_Binding::DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC)
|
|
: (Node_Binding::DOCUMENT_POSITION_FOLLOWING |
|
|
Node_Binding::DOCUMENT_POSITION_DISCONNECTED |
|
|
Node_Binding::DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC);
|
|
}
|
|
|
|
// Find where the parent chain differs and check indices in the parent.
|
|
const nsINode* parent = top1;
|
|
uint32_t len;
|
|
for (len = std::min(pos1, pos2); len > 0; --len) {
|
|
const nsINode* child1 = parents1.ElementAt(--pos1);
|
|
const nsINode* child2 = parents2.ElementAt(--pos2);
|
|
if (child1 != child2) {
|
|
// child1 or child2 can be an attribute here. This will work fine since
|
|
// ComputeIndexOf will return -1 for the attribute making the
|
|
// attribute be considered before any child.
|
|
int32_t child1Index;
|
|
bool cachedChild1Index = false;
|
|
if (&aOtherNode == child1 && aOtherIndex) {
|
|
cachedChild1Index = true;
|
|
child1Index =
|
|
*aOtherIndex != -1 ? *aOtherIndex : parent->ComputeIndexOf(child1);
|
|
} else {
|
|
child1Index = parent->ComputeIndexOf(child1);
|
|
}
|
|
|
|
int32_t child2Index;
|
|
bool cachedChild2Index = false;
|
|
if (this == child2 && aThisIndex) {
|
|
cachedChild2Index = true;
|
|
child2Index =
|
|
*aThisIndex != -1 ? *aThisIndex : parent->ComputeIndexOf(child2);
|
|
} else {
|
|
child2Index = parent->ComputeIndexOf(child2);
|
|
}
|
|
|
|
uint16_t retVal = child1Index < child2Index
|
|
? Node_Binding::DOCUMENT_POSITION_PRECEDING
|
|
: Node_Binding::DOCUMENT_POSITION_FOLLOWING;
|
|
|
|
if (cachedChild1Index) {
|
|
*aOtherIndex = child1Index;
|
|
}
|
|
if (cachedChild2Index) {
|
|
*aThisIndex = child2Index;
|
|
}
|
|
|
|
return retVal;
|
|
}
|
|
parent = child1;
|
|
}
|
|
|
|
// We hit the end of one of the parent chains without finding a difference
|
|
// between the chains. That must mean that one node is an ancestor of the
|
|
// other. The one with the shortest chain must be the ancestor.
|
|
return pos1 < pos2 ? (Node_Binding::DOCUMENT_POSITION_PRECEDING |
|
|
Node_Binding::DOCUMENT_POSITION_CONTAINS)
|
|
: (Node_Binding::DOCUMENT_POSITION_FOLLOWING |
|
|
Node_Binding::DOCUMENT_POSITION_CONTAINED_BY);
|
|
}
|
|
|
|
bool nsINode::IsSameNode(nsINode* other) { return other == this; }
|
|
|
|
bool nsINode::IsEqualNode(nsINode* aOther) {
|
|
if (!aOther) {
|
|
return false;
|
|
}
|
|
|
|
nsAutoString string1, string2;
|
|
|
|
nsINode* node1 = this;
|
|
nsINode* node2 = aOther;
|
|
do {
|
|
uint16_t nodeType = node1->NodeType();
|
|
if (nodeType != node2->NodeType()) {
|
|
return false;
|
|
}
|
|
|
|
mozilla::dom::NodeInfo* nodeInfo1 = node1->mNodeInfo;
|
|
mozilla::dom::NodeInfo* nodeInfo2 = node2->mNodeInfo;
|
|
if (!nodeInfo1->Equals(nodeInfo2) ||
|
|
nodeInfo1->GetExtraName() != nodeInfo2->GetExtraName()) {
|
|
return false;
|
|
}
|
|
|
|
switch (nodeType) {
|
|
case ELEMENT_NODE: {
|
|
// Both are elements (we checked that their nodeinfos are equal). Do the
|
|
// check on attributes.
|
|
Element* element1 = node1->AsElement();
|
|
Element* element2 = node2->AsElement();
|
|
uint32_t attrCount = element1->GetAttrCount();
|
|
if (attrCount != element2->GetAttrCount()) {
|
|
return false;
|
|
}
|
|
|
|
// Iterate over attributes.
|
|
for (uint32_t i = 0; i < attrCount; ++i) {
|
|
const nsAttrName* attrName = element1->GetAttrNameAt(i);
|
|
#ifdef DEBUG
|
|
bool hasAttr =
|
|
#endif
|
|
element1->GetAttr(attrName->NamespaceID(), attrName->LocalName(),
|
|
string1);
|
|
NS_ASSERTION(hasAttr, "Why don't we have an attr?");
|
|
|
|
if (!element2->AttrValueIs(attrName->NamespaceID(),
|
|
attrName->LocalName(), string1,
|
|
eCaseMatters)) {
|
|
return false;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
case TEXT_NODE:
|
|
case COMMENT_NODE:
|
|
case CDATA_SECTION_NODE:
|
|
case PROCESSING_INSTRUCTION_NODE: {
|
|
MOZ_ASSERT(node1->IsCharacterData());
|
|
MOZ_ASSERT(node2->IsCharacterData());
|
|
string1.Truncate();
|
|
static_cast<CharacterData*>(node1)->AppendTextTo(string1);
|
|
string2.Truncate();
|
|
static_cast<CharacterData*>(node2)->AppendTextTo(string2);
|
|
|
|
if (!string1.Equals(string2)) {
|
|
return false;
|
|
}
|
|
|
|
break;
|
|
}
|
|
case DOCUMENT_NODE:
|
|
case DOCUMENT_FRAGMENT_NODE:
|
|
break;
|
|
case ATTRIBUTE_NODE: {
|
|
NS_ASSERTION(node1 == this && node2 == aOther,
|
|
"Did we come upon an attribute node while walking a "
|
|
"subtree?");
|
|
node1->GetNodeValue(string1);
|
|
node2->GetNodeValue(string2);
|
|
|
|
// Returning here as to not bother walking subtree. And there is no
|
|
// risk that we're half way through walking some other subtree since
|
|
// attribute nodes doesn't appear in subtrees.
|
|
return string1.Equals(string2);
|
|
}
|
|
case DOCUMENT_TYPE_NODE: {
|
|
DocumentType* docType1 = static_cast<DocumentType*>(node1);
|
|
DocumentType* docType2 = static_cast<DocumentType*>(node2);
|
|
|
|
// Public ID
|
|
docType1->GetPublicId(string1);
|
|
docType2->GetPublicId(string2);
|
|
if (!string1.Equals(string2)) {
|
|
return false;
|
|
}
|
|
|
|
// System ID
|
|
docType1->GetSystemId(string1);
|
|
docType2->GetSystemId(string2);
|
|
if (!string1.Equals(string2)) {
|
|
return false;
|
|
}
|
|
|
|
break;
|
|
}
|
|
default:
|
|
MOZ_ASSERT(false, "Unknown node type");
|
|
}
|
|
|
|
nsINode* nextNode = node1->GetFirstChild();
|
|
if (nextNode) {
|
|
node1 = nextNode;
|
|
node2 = node2->GetFirstChild();
|
|
} else {
|
|
if (node2->GetFirstChild()) {
|
|
// node2 has a firstChild, but node1 doesn't
|
|
return false;
|
|
}
|
|
|
|
// Find next sibling, possibly walking parent chain.
|
|
while (1) {
|
|
if (node1 == this) {
|
|
NS_ASSERTION(node2 == aOther,
|
|
"Should have reached the start node "
|
|
"for both trees at the same time");
|
|
return true;
|
|
}
|
|
|
|
nextNode = node1->GetNextSibling();
|
|
if (nextNode) {
|
|
node1 = nextNode;
|
|
node2 = node2->GetNextSibling();
|
|
break;
|
|
}
|
|
|
|
if (node2->GetNextSibling()) {
|
|
// node2 has a nextSibling, but node1 doesn't
|
|
return false;
|
|
}
|
|
|
|
node1 = node1->GetParentNode();
|
|
node2 = node2->GetParentNode();
|
|
NS_ASSERTION(node1 && node2, "no parent while walking subtree");
|
|
}
|
|
}
|
|
} while (node2);
|
|
|
|
return false;
|
|
}
|
|
|
|
void nsINode::LookupNamespaceURI(const nsAString& aNamespacePrefix,
|
|
nsAString& aNamespaceURI) {
|
|
Element* element = GetNameSpaceElement();
|
|
if (!element || NS_FAILED(element->LookupNamespaceURIInternal(
|
|
aNamespacePrefix, aNamespaceURI))) {
|
|
SetDOMStringToNull(aNamespaceURI);
|
|
}
|
|
}
|
|
|
|
bool nsINode::ComputeDefaultWantsUntrusted(ErrorResult& aRv) {
|
|
return !nsContentUtils::IsChromeDoc(OwnerDoc());
|
|
}
|
|
|
|
void nsINode::GetBoxQuads(const BoxQuadOptions& aOptions,
|
|
nsTArray<RefPtr<DOMQuad>>& aResult,
|
|
CallerType aCallerType, mozilla::ErrorResult& aRv) {
|
|
mozilla::GetBoxQuads(this, aOptions, aResult, aCallerType, aRv);
|
|
}
|
|
|
|
already_AddRefed<DOMQuad> nsINode::ConvertQuadFromNode(
|
|
DOMQuad& aQuad, const GeometryNode& aFrom,
|
|
const ConvertCoordinateOptions& aOptions, CallerType aCallerType,
|
|
ErrorResult& aRv) {
|
|
return mozilla::ConvertQuadFromNode(this, aQuad, aFrom, aOptions, aCallerType,
|
|
aRv);
|
|
}
|
|
|
|
already_AddRefed<DOMQuad> nsINode::ConvertRectFromNode(
|
|
DOMRectReadOnly& aRect, const GeometryNode& aFrom,
|
|
const ConvertCoordinateOptions& aOptions, CallerType aCallerType,
|
|
ErrorResult& aRv) {
|
|
return mozilla::ConvertRectFromNode(this, aRect, aFrom, aOptions, aCallerType,
|
|
aRv);
|
|
}
|
|
|
|
already_AddRefed<DOMPoint> nsINode::ConvertPointFromNode(
|
|
const DOMPointInit& aPoint, const GeometryNode& aFrom,
|
|
const ConvertCoordinateOptions& aOptions, CallerType aCallerType,
|
|
ErrorResult& aRv) {
|
|
return mozilla::ConvertPointFromNode(this, aPoint, aFrom, aOptions,
|
|
aCallerType, aRv);
|
|
}
|
|
|
|
bool nsINode::DispatchEvent(Event& aEvent, CallerType aCallerType,
|
|
ErrorResult& aRv) {
|
|
// XXX sXBL/XBL2 issue -- do we really want the owner here? What
|
|
// if that's the XBL document? Would we want its presshell? Or what?
|
|
nsCOMPtr<Document> document = OwnerDoc();
|
|
|
|
// Do nothing if the element does not belong to a document
|
|
if (!document) {
|
|
return true;
|
|
}
|
|
|
|
// Obtain a presentation shell
|
|
RefPtr<nsPresContext> context = document->GetPresContext();
|
|
|
|
nsEventStatus status = nsEventStatus_eIgnore;
|
|
nsresult rv = EventDispatcher::DispatchDOMEvent(this, nullptr, &aEvent,
|
|
context, &status);
|
|
bool retval = !aEvent.DefaultPrevented(aCallerType);
|
|
if (NS_FAILED(rv)) {
|
|
aRv.Throw(rv);
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
nsresult nsINode::PostHandleEvent(EventChainPostVisitor& /*aVisitor*/) {
|
|
return NS_OK;
|
|
}
|
|
|
|
EventListenerManager* nsINode::GetOrCreateListenerManager() {
|
|
return nsContentUtils::GetListenerManagerForNode(this);
|
|
}
|
|
|
|
EventListenerManager* nsINode::GetExistingListenerManager() const {
|
|
return nsContentUtils::GetExistingListenerManagerForNode(this);
|
|
}
|
|
|
|
nsPIDOMWindowOuter* nsINode::GetOwnerGlobalForBindingsInternal() {
|
|
bool dummy;
|
|
auto* window = static_cast<nsGlobalWindowInner*>(
|
|
OwnerDoc()->GetScriptHandlingObject(dummy));
|
|
return window ? nsPIDOMWindowOuter::GetFromCurrentInner(window->AsInner())
|
|
: nullptr;
|
|
}
|
|
|
|
nsIGlobalObject* nsINode::GetOwnerGlobal() const {
|
|
bool dummy;
|
|
return OwnerDoc()->GetScriptHandlingObject(dummy);
|
|
}
|
|
|
|
bool nsINode::UnoptimizableCCNode() const {
|
|
const uintptr_t problematicFlags =
|
|
(NODE_IS_ANONYMOUS_ROOT | NODE_IS_IN_NATIVE_ANONYMOUS_SUBTREE |
|
|
NODE_IS_NATIVE_ANONYMOUS_ROOT | NODE_MAY_BE_IN_BINDING_MNGR);
|
|
return HasFlag(problematicFlags) || NodeType() == ATTRIBUTE_NODE ||
|
|
// For strange cases like xbl:content/xbl:children
|
|
(IsElement() && AsElement()->IsInNamespace(kNameSpaceID_XBL));
|
|
}
|
|
|
|
/* static */
|
|
bool nsINode::Traverse(nsINode* tmp, nsCycleCollectionTraversalCallback& cb) {
|
|
if (MOZ_LIKELY(!cb.WantAllTraces())) {
|
|
Document* currentDoc = tmp->GetComposedDoc();
|
|
if (currentDoc && nsCCUncollectableMarker::InGeneration(
|
|
currentDoc->GetMarkedCCGeneration())) {
|
|
return false;
|
|
}
|
|
|
|
if (nsCCUncollectableMarker::sGeneration) {
|
|
// If we're black no need to traverse.
|
|
if (tmp->HasKnownLiveWrapper() || tmp->InCCBlackTree()) {
|
|
return false;
|
|
}
|
|
|
|
if (!tmp->UnoptimizableCCNode()) {
|
|
// If we're in a black document, return early.
|
|
if ((currentDoc && currentDoc->HasKnownLiveWrapper())) {
|
|
return false;
|
|
}
|
|
// If we're not in anonymous content and we have a black parent,
|
|
// return early.
|
|
nsIContent* parent = tmp->GetParent();
|
|
if (parent && !parent->UnoptimizableCCNode() &&
|
|
parent->HasKnownLiveWrapper()) {
|
|
MOZ_ASSERT(parent->ComputeIndexOf(tmp) >= 0,
|
|
"Parent doesn't own us?");
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mNodeInfo)
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mFirstChild)
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mNextSibling)
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_RAWPTR(GetParent())
|
|
|
|
nsSlots* slots = tmp->GetExistingSlots();
|
|
if (slots) {
|
|
slots->Traverse(cb);
|
|
}
|
|
|
|
if (tmp->HasProperties()) {
|
|
nsCOMArray<nsISupports>* objects = static_cast<nsCOMArray<nsISupports>*>(
|
|
tmp->GetProperty(nsGkAtoms::keepobjectsalive));
|
|
if (objects) {
|
|
for (int32_t i = 0; i < objects->Count(); ++i) {
|
|
cb.NoteXPCOMChild(objects->ObjectAt(i));
|
|
}
|
|
}
|
|
|
|
#ifdef ACCESSIBILITY
|
|
AccessibleNode* anode = static_cast<AccessibleNode*>(
|
|
tmp->GetProperty(nsGkAtoms::accessiblenode));
|
|
if (anode) {
|
|
cb.NoteXPCOMChild(anode);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
if (tmp->NodeType() != DOCUMENT_NODE &&
|
|
tmp->HasFlag(NODE_HAS_LISTENERMANAGER)) {
|
|
nsContentUtils::TraverseListenerManager(tmp, cb);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/* static */
|
|
void nsINode::Unlink(nsINode* tmp) {
|
|
tmp->ReleaseWrapper(tmp);
|
|
|
|
nsSlots* slots = tmp->GetExistingSlots();
|
|
if (slots) {
|
|
slots->Unlink();
|
|
}
|
|
|
|
if (tmp->NodeType() != DOCUMENT_NODE &&
|
|
tmp->HasFlag(NODE_HAS_LISTENERMANAGER)) {
|
|
nsContentUtils::RemoveListenerManager(tmp);
|
|
tmp->UnsetFlags(NODE_HAS_LISTENERMANAGER);
|
|
}
|
|
|
|
if (tmp->HasProperties()) {
|
|
tmp->DeleteProperty(nsGkAtoms::keepobjectsalive);
|
|
tmp->DeleteProperty(nsGkAtoms::accessiblenode);
|
|
}
|
|
}
|
|
|
|
static void AdoptNodeIntoOwnerDoc(nsINode* aParent, nsINode* aNode,
|
|
ErrorResult& aError) {
|
|
NS_ASSERTION(!aNode->GetParentNode(),
|
|
"Should have removed from parent already");
|
|
|
|
Document* doc = aParent->OwnerDoc();
|
|
|
|
DebugOnly<nsINode*> adoptedNode = doc->AdoptNode(*aNode, aError);
|
|
|
|
#ifdef DEBUG
|
|
if (!aError.Failed()) {
|
|
MOZ_ASSERT(aParent->OwnerDoc() == doc, "ownerDoc chainged while adopting");
|
|
MOZ_ASSERT(adoptedNode == aNode, "Uh, adopt node changed nodes?");
|
|
MOZ_ASSERT(aParent->OwnerDoc() == aNode->OwnerDoc(),
|
|
"ownerDocument changed again after adopting!");
|
|
}
|
|
#endif // DEBUG
|
|
}
|
|
|
|
static void CheckForOutdatedParent(nsINode* aParent, nsINode* aNode,
|
|
ErrorResult& aError) {
|
|
if (JSObject* existingObjUnrooted = aNode->GetWrapper()) {
|
|
JS::Rooted<JSObject*> existingObj(RootingCx(), existingObjUnrooted);
|
|
|
|
AutoJSContext cx;
|
|
nsIGlobalObject* global = aParent->OwnerDoc()->GetScopeObject();
|
|
MOZ_ASSERT(global);
|
|
|
|
if (JS::GetNonCCWObjectGlobal(existingObj) != global->GetGlobalJSObject()) {
|
|
JSAutoRealm ar(cx, existingObj);
|
|
UpdateReflectorGlobal(cx, existingObj, aError);
|
|
}
|
|
}
|
|
}
|
|
|
|
static nsresult UpdateGlobalsInSubtree(nsIContent* aRoot) {
|
|
MOZ_ASSERT(ShouldUseXBLScope(aRoot));
|
|
// Start off with no global so we don't fire any error events on failure.
|
|
AutoJSAPI jsapi;
|
|
jsapi.Init();
|
|
|
|
JSContext* cx = jsapi.cx();
|
|
|
|
ErrorResult rv;
|
|
JS::Rooted<JSObject*> reflector(cx);
|
|
for (nsIContent* cur = aRoot; cur; cur = cur->GetNextNode(aRoot)) {
|
|
if ((reflector = cur->GetWrapper())) {
|
|
JSAutoRealm ar(cx, reflector);
|
|
UpdateReflectorGlobal(cx, reflector, rv);
|
|
rv.WouldReportJSException();
|
|
if (rv.Failed()) {
|
|
// We _could_ consider BlastSubtreeToPieces here, but it's not really
|
|
// needed. Having some nodes in here accessible to content while others
|
|
// are not is probably OK. We just need to fail out of the actual
|
|
// insertion, so they're not in the DOM. Returning a failure here will
|
|
// do that.
|
|
return rv.StealNSResult();
|
|
}
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult nsINode::InsertChildBefore(nsIContent* aKid,
|
|
nsIContent* aChildToInsertBefore,
|
|
bool aNotify) {
|
|
if (!IsContainerNode()) {
|
|
return NS_ERROR_DOM_HIERARCHY_REQUEST_ERR;
|
|
}
|
|
|
|
MOZ_ASSERT(!aKid->GetParentNode(), "Inserting node that already has parent");
|
|
MOZ_ASSERT(!IsAttr());
|
|
|
|
// The id-handling code, and in the future possibly other code, need to
|
|
// react to unexpected attribute changes.
|
|
nsMutationGuard::DidMutate();
|
|
|
|
// Do this before checking the child-count since this could cause mutations
|
|
Document* doc = GetUncomposedDoc();
|
|
mozAutoDocUpdate updateBatch(GetComposedDoc(), aNotify);
|
|
|
|
if (OwnerDoc() != aKid->OwnerDoc()) {
|
|
ErrorResult error;
|
|
AdoptNodeIntoOwnerDoc(this, aKid, error);
|
|
|
|
// Need to WouldReportJSException() if our callee can throw a JS
|
|
// exception (which it can) and we're neither propagating the
|
|
// error out nor unconditionally suppressing it.
|
|
error.WouldReportJSException();
|
|
if (NS_WARN_IF(error.Failed())) {
|
|
return error.StealNSResult();
|
|
}
|
|
} else if (OwnerDoc()->DidDocumentOpen()) {
|
|
ErrorResult error;
|
|
CheckForOutdatedParent(this, aKid, error);
|
|
|
|
// Need to WouldReportJSException() if our callee can throw a JS
|
|
// exception (which it can) and we're neither propagating the
|
|
// error out nor unconditionally suppressing it.
|
|
error.WouldReportJSException();
|
|
if (NS_WARN_IF(error.Failed())) {
|
|
return error.StealNSResult();
|
|
}
|
|
}
|
|
|
|
if (!aChildToInsertBefore) {
|
|
AppendChildToChildList(aKid);
|
|
} else {
|
|
InsertChildToChildList(aKid, aChildToInsertBefore);
|
|
}
|
|
|
|
nsIContent* parent = IsContent() ? AsContent() : nullptr;
|
|
|
|
bool wasInXBLScope = ShouldUseXBLScope(aKid);
|
|
nsresult rv = aKid->BindToTree(doc, parent,
|
|
parent ? parent->GetBindingParent() : nullptr);
|
|
if (NS_SUCCEEDED(rv) && !wasInXBLScope && ShouldUseXBLScope(aKid)) {
|
|
MOZ_ASSERT(ShouldUseXBLScope(this),
|
|
"Why does the kid need to use an XBL scope?");
|
|
rv = UpdateGlobalsInSubtree(aKid);
|
|
}
|
|
if (NS_FAILED(rv)) {
|
|
DisconnectChild(aKid);
|
|
aKid->UnbindFromTree();
|
|
return rv;
|
|
}
|
|
|
|
// Invalidate cached array of child nodes
|
|
InvalidateChildNodes();
|
|
|
|
NS_ASSERTION(aKid->GetParentNode() == this,
|
|
"Did we run script inappropriately?");
|
|
|
|
if (aNotify) {
|
|
// Note that we always want to call ContentInserted when things are added
|
|
// as kids to documents
|
|
if (parent && !aChildToInsertBefore) {
|
|
nsNodeUtils::ContentAppended(parent, aKid);
|
|
} else {
|
|
nsNodeUtils::ContentInserted(this, aKid);
|
|
}
|
|
|
|
if (nsContentUtils::HasMutationListeners(
|
|
aKid, NS_EVENT_BITS_MUTATION_NODEINSERTED, this)) {
|
|
InternalMutationEvent mutation(true, eLegacyNodeInserted);
|
|
mutation.mRelatedNode = this;
|
|
|
|
mozAutoSubtreeModified subtree(OwnerDoc(), this);
|
|
(new AsyncEventDispatcher(aKid, mutation))->RunDOMEventWhenSafe();
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsIContent* nsINode::GetPreviousSibling() const {
|
|
// Do not expose circular linked list
|
|
if (mPreviousOrLastSibling && !mPreviousOrLastSibling->mNextSibling) {
|
|
return nullptr;
|
|
}
|
|
return mPreviousOrLastSibling;
|
|
}
|
|
|
|
// CACHE_POINTER_SHIFT indicates how many steps to downshift the |this| pointer.
|
|
// It should be small enough to not cause collisions between adjecent objects,
|
|
// and large enough to make sure that all indexes are used.
|
|
#define CACHE_POINTER_SHIFT 6
|
|
#define CACHE_NUM_SLOTS 128
|
|
#define CACHE_CHILD_LIMIT 10
|
|
|
|
#define CACHE_GET_INDEX(_parent) \
|
|
((NS_PTR_TO_INT32(_parent) >> CACHE_POINTER_SHIFT) & (CACHE_NUM_SLOTS - 1))
|
|
|
|
struct IndexCacheSlot {
|
|
const nsINode* mParent;
|
|
const nsINode* mChild;
|
|
int32_t mChildIndex;
|
|
};
|
|
|
|
static IndexCacheSlot sIndexCache[CACHE_NUM_SLOTS];
|
|
|
|
static inline void AddChildAndIndexToCache(const nsINode* aParent,
|
|
const nsINode* aChild,
|
|
int32_t aChildIndex) {
|
|
uint32_t index = CACHE_GET_INDEX(aParent);
|
|
sIndexCache[index].mParent = aParent;
|
|
sIndexCache[index].mChild = aChild;
|
|
sIndexCache[index].mChildIndex = aChildIndex;
|
|
}
|
|
|
|
static inline void GetChildAndIndexFromCache(const nsINode* aParent,
|
|
const nsINode** aChild,
|
|
int32_t* aChildIndex) {
|
|
uint32_t index = CACHE_GET_INDEX(aParent);
|
|
if (sIndexCache[index].mParent == aParent) {
|
|
*aChild = sIndexCache[index].mChild;
|
|
*aChildIndex = sIndexCache[index].mChildIndex;
|
|
} else {
|
|
*aChild = nullptr;
|
|
*aChildIndex = -1;
|
|
}
|
|
}
|
|
|
|
static inline void RemoveFromCache(const nsINode* aParent) {
|
|
uint32_t index = CACHE_GET_INDEX(aParent);
|
|
if (sIndexCache[index].mParent == aParent) {
|
|
sIndexCache[index] = {nullptr, nullptr, -1};
|
|
}
|
|
}
|
|
|
|
void nsINode::AppendChildToChildList(nsIContent* aKid) {
|
|
MOZ_ASSERT(aKid);
|
|
MOZ_ASSERT(!aKid->mNextSibling);
|
|
|
|
RemoveFromCache(this);
|
|
|
|
if (mFirstChild) {
|
|
nsIContent* lastChild = GetLastChild();
|
|
lastChild->mNextSibling = aKid;
|
|
aKid->mPreviousOrLastSibling = lastChild;
|
|
} else {
|
|
mFirstChild = aKid;
|
|
}
|
|
|
|
// Maintain link to the last child
|
|
mFirstChild->mPreviousOrLastSibling = aKid;
|
|
++mChildCount;
|
|
}
|
|
|
|
void nsINode::InsertChildToChildList(nsIContent* aKid,
|
|
nsIContent* aNextSibling) {
|
|
MOZ_ASSERT(aKid);
|
|
MOZ_ASSERT(aNextSibling);
|
|
|
|
RemoveFromCache(this);
|
|
|
|
nsIContent* previousSibling = aNextSibling->mPreviousOrLastSibling;
|
|
aNextSibling->mPreviousOrLastSibling = aKid;
|
|
aKid->mPreviousOrLastSibling = previousSibling;
|
|
aKid->mNextSibling = aNextSibling;
|
|
|
|
if (aNextSibling == mFirstChild) {
|
|
MOZ_ASSERT(!previousSibling->mNextSibling);
|
|
mFirstChild = aKid;
|
|
} else {
|
|
previousSibling->mNextSibling = aKid;
|
|
}
|
|
|
|
++mChildCount;
|
|
}
|
|
|
|
void nsINode::DisconnectChild(nsIContent* aKid) {
|
|
MOZ_ASSERT(aKid);
|
|
MOZ_ASSERT(GetChildCount() > 0);
|
|
|
|
RemoveFromCache(this);
|
|
|
|
nsIContent* previousSibling = aKid->GetPreviousSibling();
|
|
nsCOMPtr<nsIContent> ref = aKid;
|
|
|
|
if (aKid->mNextSibling) {
|
|
aKid->mNextSibling->mPreviousOrLastSibling = aKid->mPreviousOrLastSibling;
|
|
} else {
|
|
// aKid is the last child in the list
|
|
mFirstChild->mPreviousOrLastSibling = aKid->mPreviousOrLastSibling;
|
|
}
|
|
aKid->mPreviousOrLastSibling = nullptr;
|
|
|
|
if (previousSibling) {
|
|
previousSibling->mNextSibling = aKid->mNextSibling.forget();
|
|
} else {
|
|
// aKid is the first child in the list
|
|
mFirstChild = aKid->mNextSibling.forget();
|
|
}
|
|
|
|
--mChildCount;
|
|
}
|
|
|
|
nsIContent* nsINode::GetChildAt_Deprecated(uint32_t aIndex) const {
|
|
if (aIndex >= GetChildCount()) {
|
|
return nullptr;
|
|
}
|
|
|
|
nsIContent* child = mFirstChild;
|
|
while (aIndex--) {
|
|
child = child->GetNextSibling();
|
|
}
|
|
|
|
return child;
|
|
}
|
|
|
|
int32_t nsINode::ComputeIndexOf(const nsINode* aChild) const {
|
|
if (!aChild) {
|
|
return -1;
|
|
}
|
|
|
|
if (aChild->GetParentNode() != this) {
|
|
return -1;
|
|
}
|
|
|
|
if (aChild == GetLastChild()) {
|
|
return GetChildCount() - 1;
|
|
}
|
|
|
|
if (mChildCount >= CACHE_CHILD_LIMIT) {
|
|
const nsINode* child;
|
|
int32_t childIndex;
|
|
GetChildAndIndexFromCache(this, &child, &childIndex);
|
|
if (child) {
|
|
if (child == aChild) {
|
|
return childIndex;
|
|
}
|
|
|
|
int32_t nextIndex = childIndex;
|
|
int32_t prevIndex = childIndex;
|
|
nsINode* prev = child->GetPreviousSibling();
|
|
nsINode* next = child->GetNextSibling();
|
|
do {
|
|
if (next) {
|
|
++nextIndex;
|
|
if (next == aChild) {
|
|
AddChildAndIndexToCache(this, aChild, nextIndex);
|
|
return nextIndex;
|
|
}
|
|
next = next->GetNextSibling();
|
|
}
|
|
if (prev) {
|
|
--prevIndex;
|
|
if (prev == aChild) {
|
|
AddChildAndIndexToCache(this, aChild, prevIndex);
|
|
return prevIndex;
|
|
}
|
|
prev = prev->GetPreviousSibling();
|
|
}
|
|
} while (prev || next);
|
|
}
|
|
}
|
|
|
|
int32_t index = 0;
|
|
nsINode* current = mFirstChild;
|
|
while (current) {
|
|
MOZ_ASSERT(current->GetParentNode() == this);
|
|
if (current == aChild) {
|
|
if (mChildCount >= CACHE_CHILD_LIMIT) {
|
|
AddChildAndIndexToCache(this, current, index);
|
|
}
|
|
return index;
|
|
}
|
|
current = current->GetNextSibling();
|
|
++index;
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
static already_AddRefed<nsINode> GetNodeFromNodeOrString(
|
|
const OwningNodeOrString& aNode, Document* aDocument) {
|
|
if (aNode.IsNode()) {
|
|
nsCOMPtr<nsINode> node = aNode.GetAsNode();
|
|
return node.forget();
|
|
}
|
|
|
|
if (aNode.IsString()) {
|
|
RefPtr<nsTextNode> textNode =
|
|
aDocument->CreateTextNode(aNode.GetAsString());
|
|
return textNode.forget();
|
|
}
|
|
|
|
MOZ_CRASH("Impossible type");
|
|
}
|
|
|
|
/**
|
|
* Implement the algorithm specified at
|
|
* https://dom.spec.whatwg.org/#converting-nodes-into-a-node for |prepend()|,
|
|
* |append()|, |before()|, |after()|, and |replaceWith()| APIs.
|
|
*/
|
|
MOZ_CAN_RUN_SCRIPT static already_AddRefed<nsINode>
|
|
ConvertNodesOrStringsIntoNode(const Sequence<OwningNodeOrString>& aNodes,
|
|
Document* aDocument, ErrorResult& aRv) {
|
|
if (aNodes.Length() == 1) {
|
|
return GetNodeFromNodeOrString(aNodes[0], aDocument);
|
|
}
|
|
|
|
nsCOMPtr<nsINode> fragment = aDocument->CreateDocumentFragment();
|
|
|
|
for (const auto& node : aNodes) {
|
|
nsCOMPtr<nsINode> childNode = GetNodeFromNodeOrString(node, aDocument);
|
|
fragment->AppendChild(*childNode, aRv);
|
|
if (aRv.Failed()) {
|
|
return nullptr;
|
|
}
|
|
}
|
|
|
|
return fragment.forget();
|
|
}
|
|
|
|
static void InsertNodesIntoHashset(
|
|
const Sequence<OwningNodeOrString>& aNodes,
|
|
nsTHashtable<nsPtrHashKey<nsINode>>& aHashset) {
|
|
for (const auto& node : aNodes) {
|
|
if (node.IsNode()) {
|
|
aHashset.PutEntry(node.GetAsNode());
|
|
}
|
|
}
|
|
}
|
|
|
|
static nsINode* FindViablePreviousSibling(
|
|
const nsINode& aNode, const Sequence<OwningNodeOrString>& aNodes) {
|
|
nsTHashtable<nsPtrHashKey<nsINode>> nodeSet(16);
|
|
InsertNodesIntoHashset(aNodes, nodeSet);
|
|
|
|
nsINode* viablePreviousSibling = nullptr;
|
|
for (nsINode* sibling = aNode.GetPreviousSibling(); sibling;
|
|
sibling = sibling->GetPreviousSibling()) {
|
|
if (!nodeSet.Contains(sibling)) {
|
|
viablePreviousSibling = sibling;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return viablePreviousSibling;
|
|
}
|
|
|
|
static nsINode* FindViableNextSibling(
|
|
const nsINode& aNode, const Sequence<OwningNodeOrString>& aNodes) {
|
|
nsTHashtable<nsPtrHashKey<nsINode>> nodeSet(16);
|
|
InsertNodesIntoHashset(aNodes, nodeSet);
|
|
|
|
nsINode* viableNextSibling = nullptr;
|
|
for (nsINode* sibling = aNode.GetNextSibling(); sibling;
|
|
sibling = sibling->GetNextSibling()) {
|
|
if (!nodeSet.Contains(sibling)) {
|
|
viableNextSibling = sibling;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return viableNextSibling;
|
|
}
|
|
|
|
void nsINode::Before(const Sequence<OwningNodeOrString>& aNodes,
|
|
ErrorResult& aRv) {
|
|
nsCOMPtr<nsINode> parent = GetParentNode();
|
|
if (!parent) {
|
|
return;
|
|
}
|
|
|
|
nsCOMPtr<nsINode> viablePreviousSibling =
|
|
FindViablePreviousSibling(*this, aNodes);
|
|
|
|
nsCOMPtr<Document> doc = OwnerDoc();
|
|
nsCOMPtr<nsINode> node = ConvertNodesOrStringsIntoNode(aNodes, doc, aRv);
|
|
if (aRv.Failed()) {
|
|
return;
|
|
}
|
|
|
|
viablePreviousSibling = viablePreviousSibling
|
|
? viablePreviousSibling->GetNextSibling()
|
|
: parent->GetFirstChild();
|
|
|
|
parent->InsertBefore(*node, viablePreviousSibling, aRv);
|
|
}
|
|
|
|
void nsINode::After(const Sequence<OwningNodeOrString>& aNodes,
|
|
ErrorResult& aRv) {
|
|
nsCOMPtr<nsINode> parent = GetParentNode();
|
|
if (!parent) {
|
|
return;
|
|
}
|
|
|
|
nsCOMPtr<nsINode> viableNextSibling = FindViableNextSibling(*this, aNodes);
|
|
|
|
nsCOMPtr<Document> doc = OwnerDoc();
|
|
nsCOMPtr<nsINode> node = ConvertNodesOrStringsIntoNode(aNodes, doc, aRv);
|
|
if (aRv.Failed()) {
|
|
return;
|
|
}
|
|
|
|
parent->InsertBefore(*node, viableNextSibling, aRv);
|
|
}
|
|
|
|
void nsINode::ReplaceWith(const Sequence<OwningNodeOrString>& aNodes,
|
|
ErrorResult& aRv) {
|
|
nsCOMPtr<nsINode> parent = GetParentNode();
|
|
if (!parent) {
|
|
return;
|
|
}
|
|
|
|
nsCOMPtr<nsINode> viableNextSibling = FindViableNextSibling(*this, aNodes);
|
|
|
|
nsCOMPtr<Document> doc = OwnerDoc();
|
|
nsCOMPtr<nsINode> node = ConvertNodesOrStringsIntoNode(aNodes, doc, aRv);
|
|
if (aRv.Failed()) {
|
|
return;
|
|
}
|
|
|
|
if (parent == GetParentNode()) {
|
|
parent->ReplaceChild(*node, *this, aRv);
|
|
} else {
|
|
parent->InsertBefore(*node, viableNextSibling, aRv);
|
|
}
|
|
}
|
|
|
|
void nsINode::Remove() {
|
|
nsCOMPtr<nsINode> parent = GetParentNode();
|
|
if (!parent) {
|
|
return;
|
|
}
|
|
|
|
parent->RemoveChild(*this, IgnoreErrors());
|
|
}
|
|
|
|
Element* nsINode::GetFirstElementChild() const {
|
|
for (nsIContent* child = GetFirstChild(); child;
|
|
child = child->GetNextSibling()) {
|
|
if (child->IsElement()) {
|
|
return child->AsElement();
|
|
}
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
Element* nsINode::GetLastElementChild() const {
|
|
for (nsIContent* child = GetLastChild(); child;
|
|
child = child->GetPreviousSibling()) {
|
|
if (child->IsElement()) {
|
|
return child->AsElement();
|
|
}
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
static bool MatchAttribute(Element* aElement, int32_t aNamespaceID,
|
|
nsAtom* aAttrName, void* aData) {
|
|
MOZ_ASSERT(aElement, "Must have content node to work with!");
|
|
nsString* attrValue = static_cast<nsString*>(aData);
|
|
if (aNamespaceID != kNameSpaceID_Unknown &&
|
|
aNamespaceID != kNameSpaceID_Wildcard) {
|
|
return attrValue->EqualsLiteral("*")
|
|
? aElement->HasAttr(aNamespaceID, aAttrName)
|
|
: aElement->AttrValueIs(aNamespaceID, aAttrName, *attrValue,
|
|
eCaseMatters);
|
|
}
|
|
|
|
// Qualified name match. This takes more work.
|
|
uint32_t count = aElement->GetAttrCount();
|
|
for (uint32_t i = 0; i < count; ++i) {
|
|
const nsAttrName* name = aElement->GetAttrNameAt(i);
|
|
bool nameMatch;
|
|
if (name->IsAtom()) {
|
|
nameMatch = name->Atom() == aAttrName;
|
|
} else if (aNamespaceID == kNameSpaceID_Wildcard) {
|
|
nameMatch = name->NodeInfo()->Equals(aAttrName);
|
|
} else {
|
|
nameMatch = name->NodeInfo()->QualifiedNameEquals(aAttrName);
|
|
}
|
|
|
|
if (nameMatch) {
|
|
return attrValue->EqualsLiteral("*") ||
|
|
aElement->AttrValueIs(name->NamespaceID(), name->LocalName(),
|
|
*attrValue, eCaseMatters);
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
already_AddRefed<nsIHTMLCollection> nsINode::GetElementsByAttribute(
|
|
const nsAString& aAttribute, const nsAString& aValue) {
|
|
RefPtr<nsAtom> attrAtom(NS_Atomize(aAttribute));
|
|
nsAutoPtr<nsString> attrValue(new nsString(aValue));
|
|
RefPtr<nsContentList> list = new nsContentList(
|
|
this, MatchAttribute, nsContentUtils::DestroyMatchString,
|
|
attrValue.forget(), true, attrAtom, kNameSpaceID_Unknown);
|
|
|
|
return list.forget();
|
|
}
|
|
|
|
already_AddRefed<nsIHTMLCollection> nsINode::GetElementsByAttributeNS(
|
|
const nsAString& aNamespaceURI, const nsAString& aAttribute,
|
|
const nsAString& aValue, ErrorResult& aRv) {
|
|
RefPtr<nsAtom> attrAtom(NS_Atomize(aAttribute));
|
|
nsAutoPtr<nsString> attrValue(new nsString(aValue));
|
|
|
|
int32_t nameSpaceId = kNameSpaceID_Wildcard;
|
|
if (!aNamespaceURI.EqualsLiteral("*")) {
|
|
nsresult rv = nsContentUtils::NameSpaceManager()->RegisterNameSpace(
|
|
aNamespaceURI, nameSpaceId);
|
|
if (NS_FAILED(rv)) {
|
|
aRv.Throw(rv);
|
|
return nullptr;
|
|
}
|
|
}
|
|
|
|
RefPtr<nsContentList> list = new nsContentList(
|
|
this, MatchAttribute, nsContentUtils::DestroyMatchString,
|
|
attrValue.forget(), true, attrAtom, nameSpaceId);
|
|
return list.forget();
|
|
}
|
|
|
|
void nsINode::Prepend(const Sequence<OwningNodeOrString>& aNodes,
|
|
ErrorResult& aRv) {
|
|
nsCOMPtr<Document> doc = OwnerDoc();
|
|
nsCOMPtr<nsINode> node = ConvertNodesOrStringsIntoNode(aNodes, doc, aRv);
|
|
if (aRv.Failed()) {
|
|
return;
|
|
}
|
|
|
|
nsCOMPtr<nsIContent> refNode = mFirstChild;
|
|
;
|
|
InsertBefore(*node, refNode, aRv);
|
|
}
|
|
|
|
void nsINode::Append(const Sequence<OwningNodeOrString>& aNodes,
|
|
ErrorResult& aRv) {
|
|
nsCOMPtr<Document> doc = OwnerDoc();
|
|
nsCOMPtr<nsINode> node = ConvertNodesOrStringsIntoNode(aNodes, doc, aRv);
|
|
if (aRv.Failed()) {
|
|
return;
|
|
}
|
|
|
|
AppendChild(*node, aRv);
|
|
}
|
|
|
|
void nsINode::RemoveChildNode(nsIContent* aKid, bool aNotify) {
|
|
// NOTE: This function must not trigger any calls to
|
|
// Document::GetRootElement() calls until *after* it has removed aKid from
|
|
// aChildArray. Any calls before then could potentially restore a stale
|
|
// value for our cached root element, per note in
|
|
// Document::RemoveChildNode().
|
|
MOZ_ASSERT(aKid && aKid->GetParentNode() == this, "Bogus aKid");
|
|
MOZ_ASSERT(!IsAttr());
|
|
|
|
nsMutationGuard::DidMutate();
|
|
mozAutoDocUpdate updateBatch(GetComposedDoc(), aNotify);
|
|
|
|
nsIContent* previousSibling = aKid->GetPreviousSibling();
|
|
|
|
// Since aKid is use also after DisconnectChild, ensure it stays alive.
|
|
nsCOMPtr<nsIContent> kungfuDeathGrip = aKid;
|
|
DisconnectChild(aKid);
|
|
|
|
// Invalidate cached array of child nodes
|
|
InvalidateChildNodes();
|
|
|
|
if (aNotify) {
|
|
nsNodeUtils::ContentRemoved(this, aKid, previousSibling);
|
|
}
|
|
|
|
aKid->UnbindFromTree();
|
|
}
|
|
|
|
// When replacing, aRefChild is the content being replaced; when
|
|
// inserting it's the content before which we're inserting. In the
|
|
// latter case it may be null.
|
|
//
|
|
// If aRv is a failure after this call, the insertion should not happen.
|
|
//
|
|
// This implements the parts of
|
|
// https://dom.spec.whatwg.org/#concept-node-ensure-pre-insertion-validity and
|
|
// the checks in https://dom.spec.whatwg.org/#concept-node-replace that
|
|
// depend on the child nodes or come after steps that depend on the child nodes
|
|
// (steps 2-6 in both cases).
|
|
static void EnsureAllowedAsChild(nsINode* aNewChild, nsINode* aParent,
|
|
bool aIsReplace, nsINode* aRefChild,
|
|
ErrorResult& aRv) {
|
|
MOZ_ASSERT(aNewChild, "Must have new child");
|
|
MOZ_ASSERT_IF(aIsReplace, aRefChild);
|
|
MOZ_ASSERT(aParent);
|
|
MOZ_ASSERT(aParent->IsDocument() || aParent->IsDocumentFragment() ||
|
|
aParent->IsElement(),
|
|
"Nodes that are not documents, document fragments or elements "
|
|
"can't be parents!");
|
|
|
|
// Step 2.
|
|
// A common case is that aNewChild has no kids, in which case
|
|
// aParent can't be a descendant of aNewChild unless they're
|
|
// actually equal to each other. Fast-path that case, since aParent
|
|
// could be pretty deep in the DOM tree.
|
|
if (aNewChild == aParent ||
|
|
((aNewChild->GetFirstChild() ||
|
|
// HTML template elements and ShadowRoot hosts need
|
|
// to be checked to ensure that they are not inserted into
|
|
// the hosted content.
|
|
aNewChild->NodeInfo()->NameAtom() == nsGkAtoms::_template ||
|
|
(aNewChild->IsElement() && aNewChild->AsElement()->GetShadowRoot())) &&
|
|
nsContentUtils::ContentIsHostIncludingDescendantOf(aParent,
|
|
aNewChild))) {
|
|
aRv.Throw(NS_ERROR_DOM_HIERARCHY_REQUEST_ERR);
|
|
return;
|
|
}
|
|
|
|
// Step 3.
|
|
if (aRefChild && aRefChild->GetParentNode() != aParent) {
|
|
aRv.Throw(NS_ERROR_DOM_NOT_FOUND_ERR);
|
|
return;
|
|
}
|
|
|
|
// Step 4.
|
|
if (!aNewChild->IsContent()) {
|
|
aRv.Throw(NS_ERROR_DOM_HIERARCHY_REQUEST_ERR);
|
|
return;
|
|
}
|
|
|
|
// Steps 5 and 6 combined.
|
|
// The allowed child nodes differ for documents and elements
|
|
switch (aNewChild->NodeType()) {
|
|
case nsINode::COMMENT_NODE:
|
|
case nsINode::PROCESSING_INSTRUCTION_NODE:
|
|
// OK in both cases
|
|
return;
|
|
case nsINode::TEXT_NODE:
|
|
case nsINode::CDATA_SECTION_NODE:
|
|
case nsINode::ENTITY_REFERENCE_NODE:
|
|
// Allowed under Elements and DocumentFragments
|
|
if (aParent->NodeType() == nsINode::DOCUMENT_NODE) {
|
|
aRv.Throw(NS_ERROR_DOM_HIERARCHY_REQUEST_ERR);
|
|
}
|
|
return;
|
|
case nsINode::ELEMENT_NODE: {
|
|
if (!aParent->IsDocument()) {
|
|
// Always ok to have elements under other elements or document fragments
|
|
return;
|
|
}
|
|
|
|
Document* parentDocument = aParent->AsDocument();
|
|
Element* rootElement = parentDocument->GetRootElement();
|
|
if (rootElement) {
|
|
// Already have a documentElement, so this is only OK if we're
|
|
// replacing it.
|
|
if (!aIsReplace || rootElement != aRefChild) {
|
|
aRv.Throw(NS_ERROR_DOM_HIERARCHY_REQUEST_ERR);
|
|
}
|
|
return;
|
|
}
|
|
|
|
// We don't have a documentElement yet. Our one remaining constraint is
|
|
// that the documentElement must come after the doctype.
|
|
if (!aRefChild) {
|
|
// Appending is just fine.
|
|
return;
|
|
}
|
|
|
|
nsIContent* docTypeContent = parentDocument->GetDoctype();
|
|
if (!docTypeContent) {
|
|
// It's all good.
|
|
return;
|
|
}
|
|
|
|
int32_t doctypeIndex = aParent->ComputeIndexOf(docTypeContent);
|
|
int32_t insertIndex = aParent->ComputeIndexOf(aRefChild);
|
|
|
|
// Now we're OK in the following two cases only:
|
|
// 1) We're replacing something that's not before the doctype
|
|
// 2) We're inserting before something that comes after the doctype
|
|
bool ok = aIsReplace ? (insertIndex >= doctypeIndex)
|
|
: insertIndex > doctypeIndex;
|
|
if (!ok) {
|
|
aRv.Throw(NS_ERROR_DOM_HIERARCHY_REQUEST_ERR);
|
|
}
|
|
return;
|
|
}
|
|
case nsINode::DOCUMENT_TYPE_NODE: {
|
|
if (!aParent->IsDocument()) {
|
|
// doctypes only allowed under documents
|
|
aRv.Throw(NS_ERROR_DOM_HIERARCHY_REQUEST_ERR);
|
|
return;
|
|
}
|
|
|
|
Document* parentDocument = aParent->AsDocument();
|
|
nsIContent* docTypeContent = parentDocument->GetDoctype();
|
|
if (docTypeContent) {
|
|
// Already have a doctype, so this is only OK if we're replacing it
|
|
if (!aIsReplace || docTypeContent != aRefChild) {
|
|
aRv.Throw(NS_ERROR_DOM_HIERARCHY_REQUEST_ERR);
|
|
}
|
|
return;
|
|
}
|
|
|
|
// We don't have a doctype yet. Our one remaining constraint is
|
|
// that the doctype must come before the documentElement.
|
|
Element* rootElement = parentDocument->GetRootElement();
|
|
if (!rootElement) {
|
|
// It's all good
|
|
return;
|
|
}
|
|
|
|
if (!aRefChild) {
|
|
// Trying to append a doctype, but have a documentElement
|
|
aRv.Throw(NS_ERROR_DOM_HIERARCHY_REQUEST_ERR);
|
|
return;
|
|
}
|
|
|
|
int32_t rootIndex = aParent->ComputeIndexOf(rootElement);
|
|
int32_t insertIndex = aParent->ComputeIndexOf(aRefChild);
|
|
|
|
// Now we're OK if and only if insertIndex <= rootIndex. Indeed, either
|
|
// we end up replacing aRefChild or we end up before it. Either one is
|
|
// ok as long as aRefChild is not after rootElement.
|
|
if (insertIndex > rootIndex) {
|
|
aRv.Throw(NS_ERROR_DOM_HIERARCHY_REQUEST_ERR);
|
|
}
|
|
return;
|
|
}
|
|
case nsINode::DOCUMENT_FRAGMENT_NODE: {
|
|
// Note that for now we only allow nodes inside document fragments if
|
|
// they're allowed inside elements. If we ever change this to allow
|
|
// doctype nodes in document fragments, we'll need to update this code.
|
|
// Also, there's a version of this code in ReplaceOrInsertBefore. If you
|
|
// change this code, change that too.
|
|
if (!aParent->IsDocument()) {
|
|
// All good here
|
|
return;
|
|
}
|
|
|
|
bool sawElement = false;
|
|
for (nsIContent* child = aNewChild->GetFirstChild(); child;
|
|
child = child->GetNextSibling()) {
|
|
if (child->IsElement()) {
|
|
if (sawElement) {
|
|
// Can't put two elements into a document
|
|
aRv.Throw(NS_ERROR_DOM_HIERARCHY_REQUEST_ERR);
|
|
return;
|
|
}
|
|
sawElement = true;
|
|
}
|
|
// If we can put this content at the right place, we might be ok;
|
|
// if not, we bail out.
|
|
EnsureAllowedAsChild(child, aParent, aIsReplace, aRefChild, aRv);
|
|
if (aRv.Failed()) {
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Everything in the fragment checked out ok, so we can stick it in here
|
|
return;
|
|
}
|
|
default:
|
|
/*
|
|
* aNewChild is of invalid type.
|
|
*/
|
|
break;
|
|
}
|
|
|
|
aRv.Throw(NS_ERROR_DOM_HIERARCHY_REQUEST_ERR);
|
|
}
|
|
|
|
// Implements
|
|
// https://dom.spec.whatwg.org/#concept-node-ensure-pre-insertion-validity
|
|
void nsINode::EnsurePreInsertionValidity(nsINode& aNewChild, nsINode* aRefChild,
|
|
ErrorResult& aError) {
|
|
EnsurePreInsertionValidity1(aError);
|
|
if (aError.Failed()) {
|
|
return;
|
|
}
|
|
EnsurePreInsertionValidity2(false, aNewChild, aRefChild, aError);
|
|
}
|
|
|
|
// Implements the parts of
|
|
// https://dom.spec.whatwg.org/#concept-node-ensure-pre-insertion-validity and
|
|
// the checks in https://dom.spec.whatwg.org/#concept-node-replace that can be
|
|
// evaluated before ever looking at the child nodes (step 1 in both cases).
|
|
void nsINode::EnsurePreInsertionValidity1(ErrorResult& aError) {
|
|
if (!IsDocument() && !IsDocumentFragment() && !IsElement()) {
|
|
aError.Throw(NS_ERROR_DOM_HIERARCHY_REQUEST_ERR);
|
|
return;
|
|
}
|
|
}
|
|
|
|
void nsINode::EnsurePreInsertionValidity2(bool aReplace, nsINode& aNewChild,
|
|
nsINode* aRefChild,
|
|
ErrorResult& aError) {
|
|
if (aNewChild.IsContent() &&
|
|
aNewChild.AsContent()->IsRootOfAnonymousSubtree()) {
|
|
// This is anonymous content. Don't allow its insertion
|
|
// anywhere, since it might have UnbindFromTree calls coming
|
|
// its way.
|
|
aError.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
|
|
return;
|
|
}
|
|
|
|
// Make sure that the inserted node is allowed as a child of its new parent.
|
|
EnsureAllowedAsChild(&aNewChild, this, aReplace, aRefChild, aError);
|
|
}
|
|
|
|
nsINode* nsINode::ReplaceOrInsertBefore(bool aReplace, nsINode* aNewChild,
|
|
nsINode* aRefChild,
|
|
ErrorResult& aError) {
|
|
// XXXbz I wish I could assert that nsContentUtils::IsSafeToRunScript() so we
|
|
// could rely on scriptblockers going out of scope to actually run XBL
|
|
// teardown, but various crud adds nodes under scriptblockers (e.g. native
|
|
// anonymous content). The only good news is those insertions can't trigger
|
|
// the bad XBL cases.
|
|
MOZ_ASSERT_IF(aReplace, aRefChild);
|
|
|
|
// Before firing DOMNodeRemoved events, make sure this is actually an insert
|
|
// we plan to do.
|
|
EnsurePreInsertionValidity1(aError);
|
|
if (aError.Failed()) {
|
|
return nullptr;
|
|
}
|
|
|
|
EnsurePreInsertionValidity2(aReplace, *aNewChild, aRefChild, aError);
|
|
if (aError.Failed()) {
|
|
return nullptr;
|
|
}
|
|
|
|
uint16_t nodeType = aNewChild->NodeType();
|
|
|
|
// Before we do anything else, fire all DOMNodeRemoved mutation events
|
|
// We do this up front as to avoid having to deal with script running
|
|
// at random places further down.
|
|
// Scope firing mutation events so that we don't carry any state that
|
|
// might be stale
|
|
{
|
|
nsMutationGuard guard;
|
|
|
|
// If we're replacing, fire for node-to-be-replaced.
|
|
// If aRefChild == aNewChild then we'll fire for it in check below
|
|
if (aReplace && aRefChild != aNewChild) {
|
|
nsContentUtils::MaybeFireNodeRemoved(aRefChild, this);
|
|
}
|
|
|
|
// If the new node already has a parent, fire for removing from old
|
|
// parent
|
|
nsINode* oldParent = aNewChild->GetParentNode();
|
|
if (oldParent) {
|
|
nsContentUtils::MaybeFireNodeRemoved(aNewChild, oldParent);
|
|
}
|
|
|
|
// If we're inserting a fragment, fire for all the children of the
|
|
// fragment
|
|
if (nodeType == DOCUMENT_FRAGMENT_NODE) {
|
|
static_cast<FragmentOrElement*>(aNewChild)->FireNodeRemovedForChildren();
|
|
}
|
|
|
|
if (guard.Mutated(0)) {
|
|
// Re-check the parts of our pre-insertion validity that might depend on
|
|
// the tree shape.
|
|
EnsurePreInsertionValidity2(aReplace, *aNewChild, aRefChild, aError);
|
|
if (aError.Failed()) {
|
|
return nullptr;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Record the node to insert before, if any
|
|
nsIContent* nodeToInsertBefore;
|
|
if (aReplace) {
|
|
nodeToInsertBefore = aRefChild->GetNextSibling();
|
|
} else {
|
|
// Since aRefChild is our child, it must be an nsIContent object.
|
|
nodeToInsertBefore = aRefChild ? aRefChild->AsContent() : nullptr;
|
|
}
|
|
if (nodeToInsertBefore == aNewChild) {
|
|
// We're going to remove aNewChild from its parent, so use its next sibling
|
|
// as the node to insert before.
|
|
nodeToInsertBefore = nodeToInsertBefore->GetNextSibling();
|
|
}
|
|
|
|
Maybe<AutoTArray<nsCOMPtr<nsIContent>, 50>> fragChildren;
|
|
|
|
// Remove the new child from the old parent if one exists
|
|
nsIContent* newContent = aNewChild->AsContent();
|
|
nsCOMPtr<nsINode> oldParent = newContent->GetParentNode();
|
|
if (oldParent) {
|
|
// Hold a strong ref to nodeToInsertBefore across the removal of newContent
|
|
nsCOMPtr<nsINode> kungFuDeathGrip = nodeToInsertBefore;
|
|
|
|
// Removing a child can run script, via XBL destructors.
|
|
nsMutationGuard guard;
|
|
|
|
// Scope for the mutation batch and scriptblocker, so they go away
|
|
// while kungFuDeathGrip is still alive.
|
|
{
|
|
mozAutoDocUpdate batch(newContent->GetComposedDoc(), true);
|
|
nsAutoMutationBatch mb(oldParent, true, true);
|
|
// ScriptBlocker ensures previous and next stay alive.
|
|
nsIContent* previous = aNewChild->GetPreviousSibling();
|
|
nsIContent* next = aNewChild->GetNextSibling();
|
|
oldParent->RemoveChildNode(aNewChild->AsContent(), true);
|
|
if (nsAutoMutationBatch::GetCurrentBatch() == &mb) {
|
|
mb.RemovalDone();
|
|
mb.SetPrevSibling(previous);
|
|
mb.SetNextSibling(next);
|
|
}
|
|
}
|
|
|
|
// We expect one mutation (the removal) to have happened.
|
|
if (guard.Mutated(1)) {
|
|
// XBL destructors, yuck.
|
|
|
|
// Verify that newContent has no parent.
|
|
if (newContent->GetParentNode()) {
|
|
aError.Throw(NS_ERROR_DOM_HIERARCHY_REQUEST_ERR);
|
|
return nullptr;
|
|
}
|
|
|
|
// And verify that newContent is still allowed as our child.
|
|
if (aNewChild == aRefChild) {
|
|
// We've already removed aRefChild. So even if we were doing a replace,
|
|
// now we're doing a simple insert before nodeToInsertBefore.
|
|
EnsureAllowedAsChild(newContent, this, false, nodeToInsertBefore,
|
|
aError);
|
|
if (aError.Failed()) {
|
|
return nullptr;
|
|
}
|
|
} else {
|
|
EnsureAllowedAsChild(newContent, this, aReplace, aRefChild, aError);
|
|
if (aError.Failed()) {
|
|
return nullptr;
|
|
}
|
|
|
|
// And recompute nodeToInsertBefore, just in case.
|
|
if (aReplace) {
|
|
nodeToInsertBefore = aRefChild->GetNextSibling();
|
|
} else {
|
|
nodeToInsertBefore = aRefChild ? aRefChild->AsContent() : nullptr;
|
|
}
|
|
}
|
|
}
|
|
} else if (nodeType == DOCUMENT_FRAGMENT_NODE) {
|
|
// Make sure to remove all the fragment's kids. We need to do this before
|
|
// we start inserting anything, so we will run out XBL destructors and
|
|
// binding teardown (GOD, I HATE THESE THINGS) before we insert anything
|
|
// into the DOM.
|
|
uint32_t count = newContent->GetChildCount();
|
|
|
|
fragChildren.emplace();
|
|
|
|
// Copy the children into a separate array to avoid having to deal with
|
|
// mutations to the fragment later on here.
|
|
fragChildren->SetCapacity(count);
|
|
for (nsIContent* child = newContent->GetFirstChild(); child;
|
|
child = child->GetNextSibling()) {
|
|
NS_ASSERTION(child->GetComposedDoc() == nullptr,
|
|
"How did we get a child with a current doc?");
|
|
fragChildren->AppendElement(child);
|
|
}
|
|
|
|
// Hold a strong ref to nodeToInsertBefore across the removals
|
|
nsCOMPtr<nsINode> kungFuDeathGrip = nodeToInsertBefore;
|
|
|
|
nsMutationGuard guard;
|
|
|
|
// Scope for the mutation batch and scriptblocker, so they go away
|
|
// while kungFuDeathGrip is still alive.
|
|
{
|
|
mozAutoDocUpdate batch(newContent->GetComposedDoc(), true);
|
|
nsAutoMutationBatch mb(newContent, false, true);
|
|
|
|
while (newContent->HasChildren()) {
|
|
newContent->RemoveChildNode(newContent->GetLastChild(), true);
|
|
}
|
|
}
|
|
|
|
// We expect |count| removals
|
|
if (guard.Mutated(count)) {
|
|
// XBL destructors, yuck.
|
|
|
|
// Verify that nodeToInsertBefore, if non-null, is still our child. If
|
|
// it's not, there's no way we can do this insert sanely; just bail out.
|
|
if (nodeToInsertBefore && nodeToInsertBefore->GetParent() != this) {
|
|
aError.Throw(NS_ERROR_DOM_HIERARCHY_REQUEST_ERR);
|
|
return nullptr;
|
|
}
|
|
|
|
// Verify that all the things in fragChildren have no parent.
|
|
for (uint32_t i = 0; i < count; ++i) {
|
|
if (fragChildren->ElementAt(i)->GetParentNode()) {
|
|
aError.Throw(NS_ERROR_DOM_HIERARCHY_REQUEST_ERR);
|
|
return nullptr;
|
|
}
|
|
}
|
|
|
|
// Note that unlike the single-element case above, none of our kids can
|
|
// be aRefChild, so we can always pass through aReplace in the
|
|
// EnsureAllowedAsChild checks below and don't have to worry about whether
|
|
// recomputing nodeToInsertBefore is OK.
|
|
|
|
// Verify that our aRefChild is still sensible
|
|
if (aRefChild && aRefChild->GetParent() != this) {
|
|
aError.Throw(NS_ERROR_DOM_HIERARCHY_REQUEST_ERR);
|
|
return nullptr;
|
|
}
|
|
|
|
// Recompute nodeToInsertBefore, just in case.
|
|
if (aReplace) {
|
|
nodeToInsertBefore = aRefChild->GetNextSibling();
|
|
} else {
|
|
// If aRefChild has 'this' as a parent, it must be an nsIContent.
|
|
nodeToInsertBefore = aRefChild ? aRefChild->AsContent() : nullptr;
|
|
}
|
|
|
|
// And verify that newContent is still allowed as our child. Sadly, we
|
|
// need to reimplement the relevant part of EnsureAllowedAsChild() because
|
|
// now our nodes are in an array and all. If you change this code,
|
|
// change the code there.
|
|
if (IsDocument()) {
|
|
bool sawElement = false;
|
|
for (uint32_t i = 0; i < count; ++i) {
|
|
nsIContent* child = fragChildren->ElementAt(i);
|
|
if (child->IsElement()) {
|
|
if (sawElement) {
|
|
// No good
|
|
aError.Throw(NS_ERROR_DOM_HIERARCHY_REQUEST_ERR);
|
|
return nullptr;
|
|
}
|
|
sawElement = true;
|
|
}
|
|
EnsureAllowedAsChild(child, this, aReplace, aRefChild, aError);
|
|
if (aError.Failed()) {
|
|
return nullptr;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
mozAutoDocUpdate batch(GetComposedDoc(), true);
|
|
nsAutoMutationBatch mb;
|
|
|
|
// If we're replacing and we haven't removed aRefChild yet, do so now
|
|
if (aReplace && aRefChild != aNewChild) {
|
|
mb.Init(this, true, true);
|
|
|
|
// Since aRefChild is never null in the aReplace case, we know that at
|
|
// this point nodeToInsertBefore is the next sibling of aRefChild.
|
|
NS_ASSERTION(aRefChild->GetNextSibling() == nodeToInsertBefore,
|
|
"Unexpected nodeToInsertBefore");
|
|
|
|
nsIContent* toBeRemoved = nodeToInsertBefore
|
|
? nodeToInsertBefore->GetPreviousSibling()
|
|
: GetLastChild();
|
|
MOZ_ASSERT(toBeRemoved);
|
|
|
|
RemoveChildNode(toBeRemoved, true);
|
|
}
|
|
|
|
// Move new child over to our document if needed. Do this after removing
|
|
// it from its parent so that AdoptNode doesn't fire DOMNodeRemoved
|
|
// DocumentType nodes are the only nodes that can have a null
|
|
// ownerDocument according to the DOM spec, and we need to allow
|
|
// inserting them w/o calling AdoptNode().
|
|
Document* doc = OwnerDoc();
|
|
if (doc != newContent->OwnerDoc()) {
|
|
AdoptNodeIntoOwnerDoc(this, aNewChild, aError);
|
|
if (aError.Failed()) {
|
|
return nullptr;
|
|
}
|
|
} else if (doc->DidDocumentOpen()) {
|
|
CheckForOutdatedParent(this, aNewChild, aError);
|
|
if (aError.Failed()) {
|
|
return nullptr;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Check if we're inserting a document fragment. If we are, we need
|
|
* to actually add its children individually (i.e. we don't add the
|
|
* actual document fragment).
|
|
*/
|
|
nsINode* result = aReplace ? aRefChild : aNewChild;
|
|
if (nodeType == DOCUMENT_FRAGMENT_NODE) {
|
|
if (!aReplace) {
|
|
mb.Init(this, true, true);
|
|
}
|
|
nsAutoMutationBatch* mutationBatch = nsAutoMutationBatch::GetCurrentBatch();
|
|
if (mutationBatch) {
|
|
mutationBatch->RemovalDone();
|
|
mutationBatch->SetPrevSibling(
|
|
nodeToInsertBefore ? nodeToInsertBefore->GetPreviousSibling()
|
|
: GetLastChild());
|
|
mutationBatch->SetNextSibling(nodeToInsertBefore);
|
|
}
|
|
|
|
uint32_t count = fragChildren->Length();
|
|
if (!count) {
|
|
return result;
|
|
}
|
|
|
|
bool appending = !IsDocument() && !nodeToInsertBefore;
|
|
nsIContent* firstInsertedContent = fragChildren->ElementAt(0);
|
|
|
|
// Iterate through the fragment's children, and insert them in the new
|
|
// parent
|
|
for (uint32_t i = 0; i < count; ++i) {
|
|
// XXXbz how come no reparenting here? That seems odd...
|
|
// Insert the child.
|
|
aError = InsertChildBefore(fragChildren->ElementAt(i), nodeToInsertBefore,
|
|
!appending);
|
|
if (aError.Failed()) {
|
|
// Make sure to notify on any children that we did succeed to insert
|
|
if (appending && i != 0) {
|
|
nsNodeUtils::ContentAppended(static_cast<nsIContent*>(this),
|
|
firstInsertedContent);
|
|
}
|
|
return nullptr;
|
|
}
|
|
}
|
|
|
|
if (mutationBatch && !appending) {
|
|
mutationBatch->NodesAdded();
|
|
}
|
|
|
|
// Notify and fire mutation events when appending
|
|
if (appending) {
|
|
nsNodeUtils::ContentAppended(static_cast<nsIContent*>(this),
|
|
firstInsertedContent);
|
|
if (mutationBatch) {
|
|
mutationBatch->NodesAdded();
|
|
}
|
|
// Optimize for the case when there are no listeners
|
|
if (nsContentUtils::HasMutationListeners(
|
|
doc, NS_EVENT_BITS_MUTATION_NODEINSERTED)) {
|
|
Element::FireNodeInserted(doc, this, *fragChildren);
|
|
}
|
|
}
|
|
} else {
|
|
// Not inserting a fragment but rather a single node.
|
|
|
|
// FIXME https://bugzilla.mozilla.org/show_bug.cgi?id=544654
|
|
// We need to reparent here for nodes for which the parent of their
|
|
// wrapper is not the wrapper for their ownerDocument (XUL elements,
|
|
// form controls, ...). Also applies in the fragment code above.
|
|
if (nsAutoMutationBatch::GetCurrentBatch() == &mb) {
|
|
mb.RemovalDone();
|
|
mb.SetPrevSibling(nodeToInsertBefore
|
|
? nodeToInsertBefore->GetPreviousSibling()
|
|
: GetLastChild());
|
|
mb.SetNextSibling(nodeToInsertBefore);
|
|
}
|
|
aError = InsertChildBefore(newContent, nodeToInsertBefore, true);
|
|
if (aError.Failed()) {
|
|
return nullptr;
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
void nsINode::BindObject(nsISupports* aObject) {
|
|
nsCOMArray<nsISupports>* objects = static_cast<nsCOMArray<nsISupports>*>(
|
|
GetProperty(nsGkAtoms::keepobjectsalive));
|
|
if (!objects) {
|
|
objects = new nsCOMArray<nsISupports>();
|
|
SetProperty(nsGkAtoms::keepobjectsalive, objects,
|
|
nsINode::DeleteProperty<nsCOMArray<nsISupports>>, true);
|
|
}
|
|
objects->AppendObject(aObject);
|
|
}
|
|
|
|
void nsINode::UnbindObject(nsISupports* aObject) {
|
|
nsCOMArray<nsISupports>* objects = static_cast<nsCOMArray<nsISupports>*>(
|
|
GetProperty(nsGkAtoms::keepobjectsalive));
|
|
if (objects) {
|
|
objects->RemoveObject(aObject);
|
|
}
|
|
}
|
|
|
|
already_AddRefed<AccessibleNode> nsINode::GetAccessibleNode() {
|
|
#ifdef ACCESSIBILITY
|
|
nsresult rv = NS_OK;
|
|
|
|
RefPtr<AccessibleNode> anode =
|
|
static_cast<AccessibleNode*>(GetProperty(nsGkAtoms::accessiblenode, &rv));
|
|
if (NS_FAILED(rv)) {
|
|
anode = new AccessibleNode(this);
|
|
RefPtr<AccessibleNode> temp = anode;
|
|
rv = SetProperty(nsGkAtoms::accessiblenode, temp.forget().take(),
|
|
nsPropertyTable::SupportsDtorFunc, true);
|
|
if (NS_FAILED(rv)) {
|
|
NS_WARNING("SetProperty failed");
|
|
return nullptr;
|
|
}
|
|
}
|
|
return anode.forget();
|
|
#else
|
|
return nullptr;
|
|
#endif
|
|
}
|
|
|
|
void nsINode::AddSizeOfExcludingThis(nsWindowSizes& aSizes,
|
|
size_t* aNodeSize) const {
|
|
EventListenerManager* elm = GetExistingListenerManager();
|
|
if (elm) {
|
|
*aNodeSize += elm->SizeOfIncludingThis(aSizes.mState.mMallocSizeOf);
|
|
}
|
|
|
|
// Measurement of the following members may be added later if DMD finds it is
|
|
// worthwhile:
|
|
// - mNodeInfo
|
|
// - mSlots
|
|
//
|
|
// The following members are not measured:
|
|
// - mParent, mNextSibling, mPreviousOrLastSibling, mFirstChild: because
|
|
// they're non-owning, from "exclusive ownership" point of view.
|
|
}
|
|
|
|
void nsINode::AddSizeOfIncludingThis(nsWindowSizes& aSizes,
|
|
size_t* aNodeSize) const {
|
|
*aNodeSize += aSizes.mState.mMallocSizeOf(this);
|
|
AddSizeOfExcludingThis(aSizes, aNodeSize);
|
|
}
|
|
|
|
bool nsINode::Contains(const nsINode* aOther) const {
|
|
if (aOther == this) {
|
|
return true;
|
|
}
|
|
if (!aOther || OwnerDoc() != aOther->OwnerDoc() ||
|
|
IsInUncomposedDoc() != aOther->IsInUncomposedDoc() ||
|
|
!aOther->IsContent() || !GetFirstChild()) {
|
|
return false;
|
|
}
|
|
|
|
const nsIContent* other = static_cast<const nsIContent*>(aOther);
|
|
if (this == OwnerDoc()) {
|
|
// document.contains(aOther) returns true if aOther is in the document,
|
|
// but is not in any anonymous subtree.
|
|
// IsInUncomposedDoc() check is done already before this.
|
|
return !other->IsInAnonymousSubtree();
|
|
}
|
|
|
|
if (!IsElement() && !IsDocumentFragment()) {
|
|
return false;
|
|
}
|
|
|
|
if (AsContent()->GetBindingParent() != other->GetBindingParent()) {
|
|
return false;
|
|
}
|
|
|
|
return nsContentUtils::ContentIsDescendantOf(other, this);
|
|
}
|
|
|
|
uint32_t nsINode::Length() const {
|
|
switch (NodeType()) {
|
|
case DOCUMENT_TYPE_NODE:
|
|
return 0;
|
|
|
|
case TEXT_NODE:
|
|
case CDATA_SECTION_NODE:
|
|
case PROCESSING_INSTRUCTION_NODE:
|
|
case COMMENT_NODE:
|
|
MOZ_ASSERT(IsContent());
|
|
return AsContent()->TextLength();
|
|
|
|
default:
|
|
return GetChildCount();
|
|
}
|
|
}
|
|
|
|
const RawServoSelectorList* nsINode::ParseSelectorList(
|
|
const nsAString& aSelectorString, ErrorResult& aRv) {
|
|
Document* doc = OwnerDoc();
|
|
|
|
Document::SelectorCache& cache = doc->GetSelectorCache();
|
|
Document::SelectorCache::SelectorList* list = cache.GetList(aSelectorString);
|
|
if (list) {
|
|
if (!*list) {
|
|
// Invalid selector.
|
|
aRv.ThrowDOMException(
|
|
NS_ERROR_DOM_SYNTAX_ERR,
|
|
NS_LITERAL_CSTRING("'") + NS_ConvertUTF16toUTF8(aSelectorString) +
|
|
NS_LITERAL_CSTRING("' is not a valid selector"));
|
|
return nullptr;
|
|
}
|
|
|
|
return list->get();
|
|
}
|
|
|
|
NS_ConvertUTF16toUTF8 selectorString(aSelectorString);
|
|
|
|
auto selectorList = UniquePtr<RawServoSelectorList>(
|
|
Servo_SelectorList_Parse(&selectorString));
|
|
if (!selectorList) {
|
|
aRv.ThrowDOMException(NS_ERROR_DOM_SYNTAX_ERR,
|
|
NS_LITERAL_CSTRING("'") + selectorString +
|
|
NS_LITERAL_CSTRING("' is not a valid selector"));
|
|
}
|
|
|
|
auto* ret = selectorList.get();
|
|
cache.CacheList(aSelectorString, std::move(selectorList));
|
|
return ret;
|
|
}
|
|
|
|
// Given an id, find first element with that id under aRoot.
|
|
// If none found, return nullptr. aRoot must be in the document.
|
|
inline static Element* FindMatchingElementWithId(
|
|
const nsAString& aId, const Element& aRoot,
|
|
const DocumentOrShadowRoot& aContainingDocOrShadowRoot) {
|
|
MOZ_ASSERT(aRoot.SubtreeRoot() == &aContainingDocOrShadowRoot.AsNode());
|
|
MOZ_ASSERT(
|
|
aRoot.IsInUncomposedDoc() || aRoot.IsInShadowTree(),
|
|
"Don't call me if the root is not in the document or in a shadow tree");
|
|
|
|
const nsTArray<Element*>* elements =
|
|
aContainingDocOrShadowRoot.GetAllElementsForId(aId);
|
|
if (!elements) {
|
|
// Nothing to do; we're done
|
|
return nullptr;
|
|
}
|
|
|
|
// XXXbz: Should we fall back to the tree walk if |elements| is long,
|
|
// for some value of "long"?
|
|
for (Element* element : *elements) {
|
|
if (MOZ_UNLIKELY(element == &aRoot)) {
|
|
continue;
|
|
}
|
|
|
|
if (!nsContentUtils::ContentIsDescendantOf(element, &aRoot)) {
|
|
continue;
|
|
}
|
|
|
|
// We have an element with the right id and it's a strict descendant
|
|
// of aRoot.
|
|
return element;
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
Element* nsINode::QuerySelector(const nsAString& aSelector,
|
|
ErrorResult& aResult) {
|
|
AUTO_PROFILER_LABEL_DYNAMIC_LOSSY_NSSTRING("nsINode::QuerySelector", DOM,
|
|
aSelector);
|
|
|
|
const RawServoSelectorList* list = ParseSelectorList(aSelector, aResult);
|
|
if (!list) {
|
|
return nullptr;
|
|
}
|
|
const bool useInvalidation = false;
|
|
return const_cast<Element*>(
|
|
Servo_SelectorList_QueryFirst(this, list, useInvalidation));
|
|
}
|
|
|
|
already_AddRefed<nsINodeList> nsINode::QuerySelectorAll(
|
|
const nsAString& aSelector, ErrorResult& aResult) {
|
|
AUTO_PROFILER_LABEL_DYNAMIC_LOSSY_NSSTRING("nsINode::QuerySelectorAll", DOM,
|
|
aSelector);
|
|
|
|
RefPtr<nsSimpleContentList> contentList = new nsSimpleContentList(this);
|
|
const RawServoSelectorList* list = ParseSelectorList(aSelector, aResult);
|
|
if (!list) {
|
|
return contentList.forget();
|
|
}
|
|
|
|
const bool useInvalidation = false;
|
|
Servo_SelectorList_QueryAll(this, list, contentList.get(), useInvalidation);
|
|
return contentList.forget();
|
|
}
|
|
|
|
Element* nsINode::GetElementById(const nsAString& aId) {
|
|
MOZ_ASSERT(!IsShadowRoot(), "Should use the faster version");
|
|
MOZ_ASSERT(IsElement() || IsDocumentFragment(),
|
|
"Bogus this object for GetElementById call");
|
|
if (IsInUncomposedDoc()) {
|
|
MOZ_ASSERT(IsElement(), "Huh? A fragment in a document?");
|
|
return FindMatchingElementWithId(aId, *AsElement(), *OwnerDoc());
|
|
}
|
|
|
|
if (ShadowRoot* containingShadow = AsContent()->GetContainingShadow()) {
|
|
MOZ_ASSERT(IsElement(), "Huh? A fragment in a ShadowRoot?");
|
|
return FindMatchingElementWithId(aId, *AsElement(), *containingShadow);
|
|
}
|
|
|
|
for (nsIContent* kid = GetFirstChild(); kid; kid = kid->GetNextNode(this)) {
|
|
if (!kid->IsElement()) {
|
|
continue;
|
|
}
|
|
nsAtom* id = kid->AsElement()->GetID();
|
|
if (id && id->Equals(aId)) {
|
|
return kid->AsElement();
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
JSObject* nsINode::WrapObject(JSContext* aCx,
|
|
JS::Handle<JSObject*> aGivenProto) {
|
|
// Make sure one of these is true
|
|
// (1) our owner document has a script handling object,
|
|
// (2) Our owner document has had a script handling object, or has been marked
|
|
// to have had one,
|
|
// (3) we are running a privileged script.
|
|
// Event handling is possible only if (1). If (2) event handling is
|
|
// prevented.
|
|
// If the document has never had a script handling object, untrusted
|
|
// scripts (3) shouldn't touch it!
|
|
bool hasHadScriptHandlingObject = false;
|
|
if (!OwnerDoc()->GetScriptHandlingObject(hasHadScriptHandlingObject) &&
|
|
!hasHadScriptHandlingObject && !nsContentUtils::IsSystemCaller(aCx)) {
|
|
Throw(aCx, NS_ERROR_UNEXPECTED);
|
|
return nullptr;
|
|
}
|
|
|
|
JS::Rooted<JSObject*> obj(aCx, WrapNode(aCx, aGivenProto));
|
|
MOZ_ASSERT_IF(obj && ChromeOnlyAccess(),
|
|
xpc::IsInContentXBLScope(obj) ||
|
|
!xpc::UseContentXBLScope(JS::GetObjectRealmOrNull(obj)));
|
|
return obj;
|
|
}
|
|
|
|
already_AddRefed<nsINode> nsINode::CloneNode(bool aDeep, ErrorResult& aError) {
|
|
return nsNodeUtils::CloneNodeImpl(this, aDeep, aError);
|
|
}
|
|
|
|
nsDOMAttributeMap* nsINode::GetAttributes() {
|
|
if (!IsElement()) {
|
|
return nullptr;
|
|
}
|
|
return AsElement()->Attributes();
|
|
}
|
|
|
|
Element* nsINode::GetParentElementCrossingShadowRoot() const {
|
|
if (!mParent) {
|
|
return nullptr;
|
|
}
|
|
|
|
if (mParent->IsElement()) {
|
|
return mParent->AsElement();
|
|
}
|
|
|
|
if (ShadowRoot* shadowRoot = ShadowRoot::FromNode(mParent)) {
|
|
MOZ_ASSERT(shadowRoot->GetHost(), "ShowRoots should always have a host");
|
|
return shadowRoot->GetHost();
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
bool nsINode::HasBoxQuadsSupport(JSContext* aCx, JSObject* /* unused */) {
|
|
return xpc::AccessCheck::isChrome(js::GetContextCompartment(aCx)) ||
|
|
nsContentUtils::GetBoxQuadsEnabled();
|
|
}
|
|
|
|
nsINode* nsINode::GetScopeChainParent() const { return nullptr; }
|
|
|
|
Element* nsINode::GetParentFlexElement() {
|
|
if (!IsContent()) {
|
|
return nullptr;
|
|
}
|
|
|
|
nsIFrame* primaryFrame = AsContent()->GetPrimaryFrame(FlushType::Frames);
|
|
|
|
// Walk up the parent chain and pierce through any anonymous boxes
|
|
// that might be between this frame and a possible flex parent.
|
|
for (nsIFrame* f = primaryFrame; f; f = f->GetParent()) {
|
|
if (f != primaryFrame && !f->Style()->IsAnonBox()) {
|
|
// We hit a non-anonymous ancestor before finding a flex item.
|
|
// Bail out.
|
|
break;
|
|
}
|
|
if (f->IsFlexItem()) {
|
|
return f->GetParent()->GetContent()->AsElement();
|
|
}
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
void nsINode::AddAnimationObserver(nsIAnimationObserver* aAnimationObserver) {
|
|
AddMutationObserver(aAnimationObserver);
|
|
OwnerDoc()->SetMayHaveAnimationObservers();
|
|
}
|
|
|
|
void nsINode::AddAnimationObserverUnlessExists(
|
|
nsIAnimationObserver* aAnimationObserver) {
|
|
AddMutationObserverUnlessExists(aAnimationObserver);
|
|
OwnerDoc()->SetMayHaveAnimationObservers();
|
|
}
|
|
|
|
void nsINode::GenerateXPath(nsAString& aResult) {
|
|
XPathGenerator::Generate(this, aResult);
|
|
}
|
|
|
|
bool nsINode::IsApzAware() const { return IsNodeApzAware(); }
|
|
|
|
bool nsINode::IsNodeApzAwareInternal() const {
|
|
return EventTarget::IsApzAware();
|
|
}
|
|
|
|
DocGroup* nsINode::GetDocGroup() const { return OwnerDoc()->GetDocGroup(); }
|
|
|
|
class LocalizationHandler : public PromiseNativeHandler {
|
|
public:
|
|
LocalizationHandler() = default;
|
|
|
|
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
|
|
NS_DECL_CYCLE_COLLECTION_CLASS(LocalizationHandler)
|
|
|
|
nsTArray<nsCOMPtr<Element>>& Elements() { return mElements; }
|
|
|
|
void SetReturnValuePromise(Promise* aReturnValuePromise) {
|
|
mReturnValuePromise = aReturnValuePromise;
|
|
}
|
|
|
|
virtual void ResolvedCallback(JSContext* aCx,
|
|
JS::Handle<JS::Value> aValue) override {
|
|
nsTArray<L10nValue> l10nData;
|
|
if (aValue.isObject()) {
|
|
JS::ForOfIterator iter(aCx);
|
|
if (!iter.init(aValue, JS::ForOfIterator::AllowNonIterable)) {
|
|
mReturnValuePromise->MaybeRejectWithUndefined();
|
|
return;
|
|
}
|
|
if (!iter.valueIsIterable()) {
|
|
mReturnValuePromise->MaybeRejectWithUndefined();
|
|
return;
|
|
}
|
|
|
|
JS::Rooted<JS::Value> temp(aCx);
|
|
while (true) {
|
|
bool done;
|
|
if (!iter.next(&temp, &done)) {
|
|
mReturnValuePromise->MaybeRejectWithUndefined();
|
|
return;
|
|
}
|
|
|
|
if (done) {
|
|
break;
|
|
}
|
|
|
|
L10nValue* slotPtr = l10nData.AppendElement(mozilla::fallible);
|
|
if (!slotPtr) {
|
|
mReturnValuePromise->MaybeRejectWithUndefined();
|
|
return;
|
|
}
|
|
|
|
if (!slotPtr->Init(aCx, temp)) {
|
|
mReturnValuePromise->MaybeRejectWithUndefined();
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (mElements.Length() != l10nData.Length()) {
|
|
mReturnValuePromise->MaybeRejectWithUndefined();
|
|
return;
|
|
}
|
|
|
|
JS::Rooted<JSObject*> untranslatedElements(
|
|
aCx, JS_NewArrayObject(aCx, mElements.Length()));
|
|
if (!untranslatedElements) {
|
|
mReturnValuePromise->MaybeRejectWithUndefined();
|
|
return;
|
|
}
|
|
|
|
ErrorResult rv;
|
|
for (size_t i = 0; i < l10nData.Length(); ++i) {
|
|
Element* elem = mElements[i];
|
|
nsString& content = l10nData[i].mValue;
|
|
if (!content.IsVoid()) {
|
|
elem->SetTextContent(content, rv);
|
|
if (NS_WARN_IF(rv.Failed())) {
|
|
mReturnValuePromise->MaybeRejectWithUndefined();
|
|
return;
|
|
}
|
|
}
|
|
|
|
Nullable<Sequence<AttributeNameValue>>& attributes =
|
|
l10nData[i].mAttributes;
|
|
if (!attributes.IsNull()) {
|
|
for (size_t j = 0; j < attributes.Value().Length(); ++j) {
|
|
// Use SetAttribute here to validate the attribute name!
|
|
elem->SetAttribute(attributes.Value()[j].mName,
|
|
attributes.Value()[j].mValue, rv);
|
|
if (rv.Failed()) {
|
|
mReturnValuePromise->MaybeRejectWithUndefined();
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (content.IsVoid() && attributes.IsNull()) {
|
|
JS::Rooted<JS::Value> wrappedElem(aCx);
|
|
if (!ToJSValue(aCx, elem, &wrappedElem)) {
|
|
mReturnValuePromise->MaybeRejectWithUndefined();
|
|
return;
|
|
}
|
|
|
|
if (!JS_DefineElement(aCx, untranslatedElements, i, wrappedElem,
|
|
JSPROP_ENUMERATE)) {
|
|
mReturnValuePromise->MaybeRejectWithUndefined();
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
JS::RootedObject sourceScope(aCx, JS::CurrentGlobalOrNull(aCx));
|
|
|
|
AutoEntryScript aes(mReturnValuePromise->GetParentObject(),
|
|
"Promise resolution");
|
|
JSContext* cx = aes.cx();
|
|
JS::Rooted<JS::Value> result(cx, JS::ObjectValue(*untranslatedElements));
|
|
|
|
xpc::StackScopedCloneOptions options;
|
|
options.wrapReflectors = true;
|
|
StackScopedClone(cx, options, sourceScope, &result);
|
|
|
|
mReturnValuePromise->MaybeResolve(result);
|
|
}
|
|
|
|
virtual void RejectedCallback(JSContext* aCx,
|
|
JS::Handle<JS::Value> aValue) override {
|
|
mReturnValuePromise->MaybeRejectWithUndefined();
|
|
}
|
|
|
|
private:
|
|
~LocalizationHandler() = default;
|
|
|
|
nsTArray<nsCOMPtr<Element>> mElements;
|
|
RefPtr<Promise> mReturnValuePromise;
|
|
};
|
|
|
|
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(LocalizationHandler)
|
|
NS_INTERFACE_MAP_ENTRY(nsISupports)
|
|
NS_INTERFACE_MAP_END
|
|
|
|
NS_IMPL_CYCLE_COLLECTION_CLASS(LocalizationHandler)
|
|
|
|
NS_IMPL_CYCLE_COLLECTING_ADDREF(LocalizationHandler)
|
|
NS_IMPL_CYCLE_COLLECTING_RELEASE(LocalizationHandler)
|
|
|
|
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(LocalizationHandler)
|
|
NS_IMPL_CYCLE_COLLECTION_UNLINK(mElements)
|
|
NS_IMPL_CYCLE_COLLECTION_UNLINK(mReturnValuePromise)
|
|
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
|
|
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(LocalizationHandler)
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mElements)
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mReturnValuePromise)
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
|
|
|
|
already_AddRefed<Promise> nsINode::Localize(
|
|
JSContext* aCx, mozilla::dom::L10nCallback& aCallback,
|
|
mozilla::ErrorResult& aRv) {
|
|
Sequence<L10nElement> l10nElements;
|
|
SequenceRooter<L10nElement> rooter(aCx, &l10nElements);
|
|
RefPtr<LocalizationHandler> nativeHandler = new LocalizationHandler();
|
|
nsTArray<nsCOMPtr<Element>>& domElements = nativeHandler->Elements();
|
|
nsIContent* node = IsContent() ? AsContent() : GetFirstChild();
|
|
nsAutoString l10nId;
|
|
nsAutoString l10nArgs;
|
|
nsAutoString l10nAttrs;
|
|
nsAutoString type;
|
|
for (; node; node = node->GetNextNode(this)) {
|
|
if (!node->IsElement()) {
|
|
continue;
|
|
}
|
|
|
|
Element* domElement = node->AsElement();
|
|
if (!domElement->GetAttr(kNameSpaceID_None, nsGkAtoms::datal10nid,
|
|
l10nId)) {
|
|
continue;
|
|
}
|
|
|
|
domElement->GetAttr(kNameSpaceID_None, nsGkAtoms::datal10nargs, l10nArgs);
|
|
domElement->GetAttr(kNameSpaceID_None, nsGkAtoms::datal10nattrs, l10nAttrs);
|
|
L10nElement* element = l10nElements.AppendElement(fallible);
|
|
if (!element) {
|
|
aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
|
|
return nullptr;
|
|
}
|
|
if (!domElements.AppendElement(domElement, fallible)) {
|
|
aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
|
|
return nullptr;
|
|
}
|
|
|
|
domElement->GetNamespaceURI(element->mNamespaceURI);
|
|
element->mLocalName = domElement->LocalName();
|
|
domElement->GetAttr(kNameSpaceID_None, nsGkAtoms::type, type);
|
|
if (!type.IsEmpty()) {
|
|
element->mType = type;
|
|
}
|
|
element->mL10nId = l10nId;
|
|
if (!l10nAttrs.IsEmpty()) {
|
|
element->mL10nAttrs = l10nAttrs;
|
|
}
|
|
if (!l10nArgs.IsEmpty()) {
|
|
JS::Rooted<JS::Value> json(aCx);
|
|
if (!JS_ParseJSON(aCx, l10nArgs.get(), l10nArgs.Length(), &json) ||
|
|
!json.isObject()) {
|
|
aRv.Throw(NS_ERROR_DOM_SYNTAX_ERR);
|
|
return nullptr;
|
|
}
|
|
element->mL10nArgs = &json.toObject();
|
|
}
|
|
}
|
|
|
|
RefPtr<Promise> callbackResult = aCallback.Call(l10nElements, aRv);
|
|
if (aRv.Failed()) {
|
|
return nullptr;
|
|
}
|
|
|
|
RefPtr<Promise> promise = Promise::Create(OwnerDoc()->GetParentObject(), aRv);
|
|
if (NS_WARN_IF(aRv.Failed())) {
|
|
return nullptr;
|
|
}
|
|
|
|
nativeHandler->SetReturnValuePromise(promise);
|
|
callbackResult->AppendNativeHandler(nativeHandler);
|
|
|
|
return promise.forget();
|
|
}
|
|
|
|
nsINode* nsINode::GetFlattenedTreeParentNodeNonInline() const {
|
|
return GetFlattenedTreeParentNode();
|
|
}
|
|
|
|
NS_IMPL_ISUPPORTS(nsNodeWeakReference, nsIWeakReference)
|
|
|
|
nsNodeWeakReference::nsNodeWeakReference(nsINode* aNode)
|
|
: nsIWeakReference(aNode) {}
|
|
|
|
nsNodeWeakReference::~nsNodeWeakReference() {
|
|
nsINode* node = static_cast<nsINode*>(mObject);
|
|
|
|
if (node) {
|
|
NS_ASSERTION(node->Slots()->mWeakReference == this,
|
|
"Weak reference has wrong value");
|
|
node->Slots()->mWeakReference = nullptr;
|
|
}
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsNodeWeakReference::QueryReferentFromScript(const nsIID& aIID,
|
|
void** aInstancePtr) {
|
|
return QueryReferent(aIID, aInstancePtr);
|
|
}
|
|
|
|
size_t nsNodeWeakReference::SizeOfOnlyThis(
|
|
mozilla::MallocSizeOf aMallocSizeOf) const {
|
|
return aMallocSizeOf(this);
|
|
}
|