mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-10-30 13:45:27 +00:00
3020 lines
89 KiB
C++
3020 lines
89 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 "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/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/TimeStamp.h"
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#include "mozilla/css/StyleRule.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/ShadowRoot.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 "nsDocument.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 "nsIAtom.h"
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#include "nsIBaseWindow.h"
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#include "nsICategoryManager.h"
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#include "nsIContentIterator.h"
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#include "nsIControllers.h"
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#include "nsIDocument.h"
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#include "nsIDOMDocument.h"
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#include "nsIDOMDocumentType.h"
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#include "nsIDOMEvent.h"
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#include "nsIDOMEventListener.h"
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#include "nsIDOMMutationEvent.h"
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#include "nsIDOMNodeList.h"
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#include "nsIEditor.h"
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#include "nsIEditorIMESupport.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 "nsRuleProcessorData.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 "mozilla/Preferences.h"
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#include "prprf.h"
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#include "xpcpublic.h"
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#include "nsCSSRuleProcessor.h"
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#include "nsCSSParser.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 "DocumentType.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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#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()
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: mWeakReference(nullptr),
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mEditableDescendantCount(0)
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{
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}
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nsINode::nsSlots::~nsSlots()
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{
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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
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nsINode::nsSlots::Traverse(nsCycleCollectionTraversalCallback &cb)
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{
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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
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nsINode::nsSlots::Unlink()
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{
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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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nsINode::~nsINode()
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{
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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*
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nsINode::GetProperty(uint16_t aCategory, nsIAtom *aPropertyName,
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nsresult *aStatus) const
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{
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return OwnerDoc()->PropertyTable(aCategory)->GetProperty(this, aPropertyName,
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aStatus);
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}
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nsresult
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nsINode::SetProperty(uint16_t aCategory, nsIAtom *aPropertyName, void *aValue,
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NSPropertyDtorFunc aDtor, bool aTransfer,
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void **aOldValue)
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{
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nsresult rv = OwnerDoc()->PropertyTable(aCategory)->SetProperty(this,
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aPropertyName,
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aValue, aDtor,
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nullptr,
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aTransfer,
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aOldValue);
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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
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nsINode::DeleteProperty(uint16_t aCategory, nsIAtom *aPropertyName)
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{
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OwnerDoc()->PropertyTable(aCategory)->DeleteProperty(this, aPropertyName);
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}
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void*
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nsINode::UnsetProperty(uint16_t aCategory, nsIAtom *aPropertyName,
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nsresult *aStatus)
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{
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return OwnerDoc()->PropertyTable(aCategory)->UnsetProperty(this,
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aPropertyName,
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aStatus);
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}
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nsINode::nsSlots*
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nsINode::CreateSlots()
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{
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return new nsSlots();
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}
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bool
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nsINode::IsEditableInternal() const
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{
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if (HasFlag(NODE_IS_EDITABLE)) {
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// The node is in an editable contentEditable subtree.
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return true;
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}
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nsIDocument *doc = GetUncomposedDoc();
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// Check if the node is in a document and the document is in designMode.
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return doc && doc->HasFlag(NODE_IS_EDITABLE);
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}
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static nsIContent* GetEditorRootContent(nsIEditor* aEditor)
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{
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nsCOMPtr<nsIDOMElement> rootElement;
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aEditor->GetRootElement(getter_AddRefs(rootElement));
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nsCOMPtr<nsIContent> rootContent(do_QueryInterface(rootElement));
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return rootContent;
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}
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nsIContent*
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nsINode::GetTextEditorRootContent(nsIEditor** aEditor)
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{
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if (aEditor)
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*aEditor = nullptr;
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for (nsINode* node = this; node; node = node->GetParentNode()) {
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if (!node->IsElement() ||
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!node->IsHTMLElement())
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continue;
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nsCOMPtr<nsIEditor> editor =
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static_cast<nsGenericHTMLElement*>(node)->GetEditorInternal();
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if (!editor)
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continue;
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nsIContent* rootContent = GetEditorRootContent(editor);
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if (aEditor)
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editor.swap(*aEditor);
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return rootContent;
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}
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return nullptr;
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}
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nsINode*
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nsINode::SubtreeRoot() const
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{
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// There are four cases of interest here. nsINodes that are really:
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// 1. nsIDocument 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. nsIAttribute 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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} else {
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node = mSubtreeRoot;
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}
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NS_ASSERTION(node, "Should always have a node here!");
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#ifdef DEBUG
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{
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const nsINode* slowNode = this;
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const nsINode* iter = slowNode;
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while ((iter = iter->GetParentNode())) {
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slowNode = iter;
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}
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NS_ASSERTION(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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{
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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*
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nsINode::GetSelectionRootContent(nsIPresShell* aPresShell)
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{
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NS_ENSURE_TRUE(aPresShell, nullptr);
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if (IsNodeOfType(eDOCUMENT))
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return static_cast<nsIDocument*>(this)->GetRootElement();
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if (!IsNodeOfType(eCONTENT))
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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)
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return content;
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}
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nsPresContext* presContext = aPresShell->GetPresContext();
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if (presContext) {
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nsIEditor* editor = nsContentUtils::GetHTMLEditor(presContext);
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if (editor) {
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// This node is in HTML editor.
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nsIDocument* 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 = GetEditorRootContent(editor);
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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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nsIDocument* 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)
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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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ShadowRoot* shadowRoot = ShadowRoot::FromNode(content);
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if (shadowRoot) {
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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*
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nsINode::ChildNodes()
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{
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nsSlots* slots = Slots();
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if (!slots->mChildNodes) {
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slots->mChildNodes = new nsChildContentList(this);
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}
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return slots->mChildNodes;
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}
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void
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nsINode::GetTextContentInternal(nsAString& aTextContent, ErrorResult& aError)
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{
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SetDOMStringToNull(aTextContent);
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}
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nsIDocument*
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nsINode::GetComposedDocInternal() const
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{
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MOZ_ASSERT(HasFlag(NODE_IS_IN_SHADOW_TREE) && IsContent(),
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"Should only be caled on nodes in the shadow tree.");
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ShadowRoot* containingShadow = AsContent()->GetContainingShadow();
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return containingShadow->IsComposedDocParticipant() ? OwnerDoc() : nullptr;
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}
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#ifdef DEBUG
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void
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nsINode::CheckNotNativeAnonymous() const
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{
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if (!IsNodeOfType(eCONTENT))
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return;
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nsIContent* content = 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
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nsINode::IsInAnonymousSubtree() const
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{
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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&
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operator<<(std::ostream& aStream, const nsINode& aNode)
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{
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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 = elemDesc + NS_LITERAL_STRING("['") + id +
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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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bool
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nsINode::IsAnonymousContentInSVGUseSubtree() const
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{
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MOZ_ASSERT(IsInAnonymousSubtree());
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nsIContent* parent = AsContent()->GetBindingParent();
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// Watch out for parentless native-anonymous subtrees.
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return parent && parent->IsSVGElement(nsGkAtoms::use);
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}
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nsresult
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nsINode::GetParentNode(nsIDOMNode** aParentNode)
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{
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*aParentNode = nullptr;
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nsINode *parent = GetParentNode();
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return parent ? CallQueryInterface(parent, aParentNode) : NS_OK;
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}
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nsresult
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nsINode::GetChildNodes(nsIDOMNodeList** aChildNodes)
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{
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NS_ADDREF(*aChildNodes = ChildNodes());
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return NS_OK;
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}
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nsresult
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nsINode::GetFirstChild(nsIDOMNode** aNode)
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{
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nsIContent* child = GetFirstChild();
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if (child) {
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return CallQueryInterface(child, aNode);
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}
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*aNode = nullptr;
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return NS_OK;
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}
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nsresult
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nsINode::GetLastChild(nsIDOMNode** aNode)
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{
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nsIContent* child = GetLastChild();
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if (child) {
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return CallQueryInterface(child, aNode);
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}
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*aNode = nullptr;
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return NS_OK;
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}
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nsresult
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nsINode::GetPreviousSibling(nsIDOMNode** aPrevSibling)
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{
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*aPrevSibling = nullptr;
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nsIContent *sibling = GetPreviousSibling();
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return sibling ? CallQueryInterface(sibling, aPrevSibling) : NS_OK;
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}
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nsresult
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nsINode::GetNextSibling(nsIDOMNode** aNextSibling)
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{
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*aNextSibling = nullptr;
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nsIContent *sibling = GetNextSibling();
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return sibling ? CallQueryInterface(sibling, aNextSibling) : NS_OK;
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}
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nsresult
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nsINode::GetOwnerDocument(nsIDOMDocument** aOwnerDocument)
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{
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*aOwnerDocument = nullptr;
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|
|
nsIDocument *ownerDoc = GetOwnerDocument();
|
|
|
|
return ownerDoc ? CallQueryInterface(ownerDoc, aOwnerDocument) : NS_OK;
|
|
}
|
|
|
|
void
|
|
nsINode::GetNodeValueInternal(nsAString& aNodeValue)
|
|
{
|
|
SetDOMStringToNull(aNodeValue);
|
|
}
|
|
|
|
nsINode*
|
|
nsINode::RemoveChild(nsINode& aOldChild, ErrorResult& aError)
|
|
{
|
|
if (IsNodeOfType(eDATA_NODE)) {
|
|
// aOldChild can't be one of our children.
|
|
aError.Throw(NS_ERROR_DOM_NOT_FOUND_ERR);
|
|
return nullptr;
|
|
}
|
|
|
|
if (aOldChild.GetParentNode() == this) {
|
|
nsContentUtils::MaybeFireNodeRemoved(&aOldChild, this, OwnerDoc());
|
|
}
|
|
|
|
int32_t index = IndexOf(&aOldChild);
|
|
if (index == -1) {
|
|
// aOldChild isn't one of our children.
|
|
aError.Throw(NS_ERROR_DOM_NOT_FOUND_ERR);
|
|
return nullptr;
|
|
}
|
|
|
|
RemoveChildAt(index, true);
|
|
return &aOldChild;
|
|
}
|
|
|
|
nsresult
|
|
nsINode::RemoveChild(nsIDOMNode* aOldChild, nsIDOMNode** aReturn)
|
|
{
|
|
nsCOMPtr<nsINode> oldChild = do_QueryInterface(aOldChild);
|
|
if (!oldChild) {
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
|
|
ErrorResult rv;
|
|
RemoveChild(*oldChild, rv);
|
|
if (!rv.Failed()) {
|
|
NS_ADDREF(*aReturn = aOldChild);
|
|
}
|
|
return rv.StealNSResult();
|
|
}
|
|
|
|
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() != nsIDOMNode::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.
|
|
nsIDocument* 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,
|
|
doc);
|
|
}
|
|
}
|
|
}
|
|
|
|
mozAutoDocUpdate batch(doc, UPDATE_CONTENT_MODEL, 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() == nsIDOMNode::TEXT_NODE) ||
|
|
hasRemoveListeners,
|
|
"Should always have a previous text sibling unless "
|
|
"mutation events messed us up");
|
|
if (!hasRemoveListeners ||
|
|
(target && target->NodeType() == nsIDOMNode::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->RemoveChildAt(parent->IndexOf(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, ErrorResult& aRv) const
|
|
{
|
|
nsCOMPtr<nsIURI> baseURI = GetBaseURI(nsContentUtils::IsCallerChrome());
|
|
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()) {
|
|
uint32_t attrCount = content->GetAttrCount();
|
|
|
|
for (uint32_t i = 0; i < attrCount; ++i) {
|
|
const nsAttrName* name = content->GetAttrNameAt(i);
|
|
|
|
if (name->NamespaceEquals(kNameSpaceID_XMLNS) &&
|
|
content->AttrValueIs(kNameSpaceID_XMLNS, name->LocalName(),
|
|
aNamespaceURI, eCaseMatters)) {
|
|
// If the localName is "xmlns", the prefix we output should be
|
|
// null.
|
|
nsIAtom *localName = name->LocalName();
|
|
|
|
if (localName != nsGkAtoms::xmlns) {
|
|
localName->ToString(aPrefix);
|
|
}
|
|
else {
|
|
SetDOMStringToNull(aPrefix);
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
SetDOMStringToNull(aPrefix);
|
|
}
|
|
|
|
static nsresult
|
|
SetUserDataProperty(uint16_t aCategory, nsINode *aNode, nsIAtom *aKey,
|
|
nsISupports* aValue, void** aOldValue)
|
|
{
|
|
nsresult rv = aNode->SetProperty(aCategory, aKey, aValue,
|
|
nsPropertyTable::SupportsDtorFunc, true,
|
|
aOldValue);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
// Property table owns it now.
|
|
NS_ADDREF(aValue);
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
nsINode::SetUserData(const nsAString &aKey, nsIVariant *aData, nsIVariant **aResult)
|
|
{
|
|
OwnerDoc()->WarnOnceAbout(nsIDocument::eGetSetUserData);
|
|
*aResult = nullptr;
|
|
|
|
nsCOMPtr<nsIAtom> key = NS_Atomize(aKey);
|
|
if (!key) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
|
|
nsresult rv;
|
|
void *data;
|
|
if (aData) {
|
|
rv = SetUserDataProperty(DOM_USER_DATA, this, key, aData, &data);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
else {
|
|
data = UnsetProperty(DOM_USER_DATA, key);
|
|
}
|
|
|
|
// Take over ownership of the old data from the property table.
|
|
nsCOMPtr<nsIVariant> oldData = dont_AddRef(static_cast<nsIVariant*>(data));
|
|
oldData.swap(*aResult);
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
nsINode::SetUserData(JSContext* aCx, const nsAString& aKey,
|
|
JS::Handle<JS::Value> aData,
|
|
JS::MutableHandle<JS::Value> aRetval,
|
|
ErrorResult& aError)
|
|
{
|
|
nsCOMPtr<nsIVariant> data;
|
|
aError = nsContentUtils::XPConnect()->JSValToVariant(aCx, aData, getter_AddRefs(data));
|
|
if (aError.Failed()) {
|
|
return;
|
|
}
|
|
|
|
nsCOMPtr<nsIVariant> oldData;
|
|
aError = SetUserData(aKey, data, getter_AddRefs(oldData));
|
|
if (aError.Failed()) {
|
|
return;
|
|
}
|
|
|
|
if (!oldData) {
|
|
aRetval.setNull();
|
|
return;
|
|
}
|
|
|
|
JSAutoCompartment ac(aCx, GetWrapper());
|
|
aError = nsContentUtils::XPConnect()->VariantToJS(aCx, GetWrapper(), oldData,
|
|
aRetval);
|
|
}
|
|
|
|
nsIVariant*
|
|
nsINode::GetUserData(const nsAString& aKey)
|
|
{
|
|
OwnerDoc()->WarnOnceAbout(nsIDocument::eGetSetUserData);
|
|
nsCOMPtr<nsIAtom> key = NS_Atomize(aKey);
|
|
if (!key) {
|
|
return nullptr;
|
|
}
|
|
|
|
return static_cast<nsIVariant*>(GetProperty(DOM_USER_DATA, key));
|
|
}
|
|
|
|
void
|
|
nsINode::GetUserData(JSContext* aCx, const nsAString& aKey,
|
|
JS::MutableHandle<JS::Value> aRetval, ErrorResult& aError)
|
|
{
|
|
nsIVariant* data = GetUserData(aKey);
|
|
if (!data) {
|
|
aRetval.setNull();
|
|
return;
|
|
}
|
|
|
|
JSAutoCompartment ac(aCx, GetWrapper());
|
|
aError = nsContentUtils::XPConnect()->VariantToJS(aCx, GetWrapper(), data,
|
|
aRetval);
|
|
}
|
|
|
|
uint16_t
|
|
nsINode::CompareDocumentPosition(nsINode& aOtherNode) const
|
|
{
|
|
if (this == &aOtherNode) {
|
|
return 0;
|
|
}
|
|
if (GetPreviousSibling() == &aOtherNode) {
|
|
MOZ_ASSERT(GetParentNode() == aOtherNode.GetParentNode());
|
|
return static_cast<uint16_t>(nsIDOMNode::DOCUMENT_POSITION_PRECEDING);
|
|
}
|
|
if (GetNextSibling() == &aOtherNode) {
|
|
MOZ_ASSERT(GetParentNode() == aOtherNode.GetParentNode());
|
|
return static_cast<uint16_t>(nsIDOMNode::DOCUMENT_POSITION_FOLLOWING);
|
|
}
|
|
|
|
AutoTArray<const nsINode*, 32> parents1, parents2;
|
|
|
|
const nsINode *node1 = &aOtherNode, *node2 = this;
|
|
|
|
// Check if either node is an attribute
|
|
const Attr* attr1 = nullptr;
|
|
if (node1->IsNodeOfType(nsINode::eATTRIBUTE)) {
|
|
attr1 = static_cast<const Attr*>(node1);
|
|
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 (node2->IsNodeOfType(nsINode::eATTRIBUTE)) {
|
|
const Attr* attr2 = static_cast<const Attr*>(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 nsIDOMNode::DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC |
|
|
nsIDOMNode::DOCUMENT_POSITION_PRECEDING;
|
|
}
|
|
if (attrName->Equals(attr2->NodeInfo())) {
|
|
return nsIDOMNode::DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC |
|
|
nsIDOMNode::DOCUMENT_POSITION_FOLLOWING;
|
|
}
|
|
}
|
|
NS_NOTREACHED("neither attribute in the element");
|
|
return nsIDOMNode::DOCUMENT_POSITION_DISCONNECTED;
|
|
}
|
|
|
|
if (elem) {
|
|
node2 = elem;
|
|
parents2.AppendElement(attr2);
|
|
}
|
|
}
|
|
|
|
// We now know that both nodes are either nsIContents or nsIDocuments.
|
|
// 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 ?
|
|
(nsIDOMNode::DOCUMENT_POSITION_PRECEDING |
|
|
nsIDOMNode::DOCUMENT_POSITION_DISCONNECTED |
|
|
nsIDOMNode::DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC) :
|
|
(nsIDOMNode::DOCUMENT_POSITION_FOLLOWING |
|
|
nsIDOMNode::DOCUMENT_POSITION_DISCONNECTED |
|
|
nsIDOMNode::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
|
|
// IndexOf will return -1 for the attribute making the attribute be
|
|
// considered before any child.
|
|
return parent->IndexOf(child1) < parent->IndexOf(child2) ?
|
|
static_cast<uint16_t>(nsIDOMNode::DOCUMENT_POSITION_PRECEDING) :
|
|
static_cast<uint16_t>(nsIDOMNode::DOCUMENT_POSITION_FOLLOWING);
|
|
}
|
|
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 ?
|
|
(nsIDOMNode::DOCUMENT_POSITION_PRECEDING |
|
|
nsIDOMNode::DOCUMENT_POSITION_CONTAINS) :
|
|
(nsIDOMNode::DOCUMENT_POSITION_FOLLOWING |
|
|
nsIDOMNode::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 nsIDOMNode::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 nsIDOMNode::TEXT_NODE:
|
|
case nsIDOMNode::COMMENT_NODE:
|
|
case nsIDOMNode::CDATA_SECTION_NODE:
|
|
case nsIDOMNode::PROCESSING_INSTRUCTION_NODE:
|
|
{
|
|
string1.Truncate();
|
|
static_cast<nsIContent*>(node1)->AppendTextTo(string1);
|
|
string2.Truncate();
|
|
static_cast<nsIContent*>(node2)->AppendTextTo(string2);
|
|
|
|
if (!string1.Equals(string2)) {
|
|
return false;
|
|
}
|
|
|
|
break;
|
|
}
|
|
case nsIDOMNode::DOCUMENT_NODE:
|
|
case nsIDOMNode::DOCUMENT_FRAGMENT_NODE:
|
|
break;
|
|
case nsIDOMNode::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 nsIDOMNode::DOCUMENT_TYPE_NODE:
|
|
{
|
|
nsCOMPtr<nsIDOMDocumentType> docType1 = do_QueryInterface(node1);
|
|
nsCOMPtr<nsIDOMDocumentType> docType2 = do_QueryInterface(node2);
|
|
|
|
NS_ASSERTION(docType1 && docType2, "Why don't we have a document type node?");
|
|
|
|
// 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);
|
|
}
|
|
}
|
|
|
|
NS_IMPL_DOMTARGET_DEFAULTS(nsINode)
|
|
|
|
NS_IMETHODIMP
|
|
nsINode::AddEventListener(const nsAString& aType,
|
|
nsIDOMEventListener *aListener,
|
|
bool aUseCapture,
|
|
bool aWantsUntrusted,
|
|
uint8_t aOptionalArgc)
|
|
{
|
|
NS_ASSERTION(!aWantsUntrusted || aOptionalArgc > 1,
|
|
"Won't check if this is chrome, you want to set "
|
|
"aWantsUntrusted to false or make the aWantsUntrusted "
|
|
"explicit by making aOptionalArgc non-zero.");
|
|
|
|
if (!aWantsUntrusted &&
|
|
(aOptionalArgc < 2 &&
|
|
!nsContentUtils::IsChromeDoc(OwnerDoc()))) {
|
|
aWantsUntrusted = true;
|
|
}
|
|
|
|
EventListenerManager* listener_manager = GetOrCreateListenerManager();
|
|
NS_ENSURE_STATE(listener_manager);
|
|
listener_manager->AddEventListener(aType, aListener, aUseCapture,
|
|
aWantsUntrusted);
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
nsINode::AddEventListener(const nsAString& aType,
|
|
EventListener* aListener,
|
|
const AddEventListenerOptionsOrBoolean& aOptions,
|
|
const Nullable<bool>& aWantsUntrusted,
|
|
ErrorResult& aRv)
|
|
{
|
|
bool wantsUntrusted;
|
|
if (aWantsUntrusted.IsNull()) {
|
|
wantsUntrusted = !nsContentUtils::IsChromeDoc(OwnerDoc());
|
|
} else {
|
|
wantsUntrusted = aWantsUntrusted.Value();
|
|
}
|
|
|
|
EventListenerManager* listener_manager = GetOrCreateListenerManager();
|
|
if (!listener_manager) {
|
|
aRv.Throw(NS_ERROR_UNEXPECTED);
|
|
return;
|
|
}
|
|
|
|
listener_manager->AddEventListener(aType, aListener, aOptions,
|
|
wantsUntrusted);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsINode::AddSystemEventListener(const nsAString& aType,
|
|
nsIDOMEventListener *aListener,
|
|
bool aUseCapture,
|
|
bool aWantsUntrusted,
|
|
uint8_t aOptionalArgc)
|
|
{
|
|
NS_ASSERTION(!aWantsUntrusted || aOptionalArgc > 1,
|
|
"Won't check if this is chrome, you want to set "
|
|
"aWantsUntrusted to false or make the aWantsUntrusted "
|
|
"explicit by making aOptionalArgc non-zero.");
|
|
|
|
if (!aWantsUntrusted &&
|
|
(aOptionalArgc < 2 &&
|
|
!nsContentUtils::IsChromeDoc(OwnerDoc()))) {
|
|
aWantsUntrusted = true;
|
|
}
|
|
|
|
return NS_AddSystemEventListener(this, aType, aListener, aUseCapture,
|
|
aWantsUntrusted);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsINode::RemoveEventListener(const nsAString& aType,
|
|
nsIDOMEventListener* aListener,
|
|
bool aUseCapture)
|
|
{
|
|
EventListenerManager* elm = GetExistingListenerManager();
|
|
if (elm) {
|
|
elm->RemoveEventListener(aType, aListener, aUseCapture);
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMPL_REMOVE_SYSTEM_EVENT_LISTENER(nsINode)
|
|
|
|
nsresult
|
|
nsINode::GetEventTargetParent(EventChainPreVisitor& aVisitor)
|
|
{
|
|
// This is only here so that we can use the NS_DECL_NSIDOMTARGET macro
|
|
NS_ABORT();
|
|
return NS_ERROR_NOT_IMPLEMENTED;
|
|
}
|
|
|
|
void
|
|
nsINode::GetBoxQuads(const BoxQuadOptions& aOptions,
|
|
nsTArray<RefPtr<DOMQuad> >& aResult,
|
|
mozilla::ErrorResult& aRv)
|
|
{
|
|
mozilla::GetBoxQuads(this, aOptions, aResult, aRv);
|
|
}
|
|
|
|
already_AddRefed<DOMQuad>
|
|
nsINode::ConvertQuadFromNode(DOMQuad& aQuad,
|
|
const GeometryNode& aFrom,
|
|
const ConvertCoordinateOptions& aOptions,
|
|
ErrorResult& aRv)
|
|
{
|
|
return mozilla::ConvertQuadFromNode(this, aQuad, aFrom, aOptions, aRv);
|
|
}
|
|
|
|
already_AddRefed<DOMQuad>
|
|
nsINode::ConvertRectFromNode(DOMRectReadOnly& aRect,
|
|
const GeometryNode& aFrom,
|
|
const ConvertCoordinateOptions& aOptions,
|
|
ErrorResult& aRv)
|
|
{
|
|
return mozilla::ConvertRectFromNode(this, aRect, aFrom, aOptions, aRv);
|
|
}
|
|
|
|
already_AddRefed<DOMPoint>
|
|
nsINode::ConvertPointFromNode(const DOMPointInit& aPoint,
|
|
const GeometryNode& aFrom,
|
|
const ConvertCoordinateOptions& aOptions,
|
|
ErrorResult& aRv)
|
|
{
|
|
return mozilla::ConvertPointFromNode(this, aPoint, aFrom, aOptions, aRv);
|
|
}
|
|
|
|
nsresult
|
|
nsINode::DispatchEvent(nsIDOMEvent *aEvent, bool* aRetVal)
|
|
{
|
|
// 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<nsIDocument> document = OwnerDoc();
|
|
|
|
// Do nothing if the element does not belong to a document
|
|
if (!document) {
|
|
*aRetVal = true;
|
|
return NS_OK;
|
|
}
|
|
|
|
// Obtain a presentation shell
|
|
nsIPresShell *shell = document->GetShell();
|
|
RefPtr<nsPresContext> context;
|
|
if (shell) {
|
|
context = shell->GetPresContext();
|
|
}
|
|
|
|
nsEventStatus status = nsEventStatus_eIgnore;
|
|
nsresult rv =
|
|
EventDispatcher::DispatchDOMEvent(this, nullptr, aEvent, context, &status);
|
|
*aRetVal = (status != nsEventStatus_eConsumeNoDefault);
|
|
return rv;
|
|
}
|
|
|
|
nsresult
|
|
nsINode::PostHandleEvent(EventChainPostVisitor& /*aVisitor*/)
|
|
{
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
nsINode::DispatchDOMEvent(WidgetEvent* aEvent,
|
|
nsIDOMEvent* aDOMEvent,
|
|
nsPresContext* aPresContext,
|
|
nsEventStatus* aEventStatus)
|
|
{
|
|
return EventDispatcher::DispatchDOMEvent(this, aEvent, aDOMEvent,
|
|
aPresContext, aEventStatus);
|
|
}
|
|
|
|
EventListenerManager*
|
|
nsINode::GetOrCreateListenerManager()
|
|
{
|
|
return nsContentUtils::GetListenerManagerForNode(this);
|
|
}
|
|
|
|
EventListenerManager*
|
|
nsINode::GetExistingListenerManager() const
|
|
{
|
|
return nsContentUtils::GetExistingListenerManagerForNode(this);
|
|
}
|
|
|
|
nsIScriptContext*
|
|
nsINode::GetContextForEventHandlers(nsresult* aRv)
|
|
{
|
|
return nsContentUtils::GetContextForEventHandlers(this, aRv);
|
|
}
|
|
|
|
nsPIDOMWindowOuter*
|
|
nsINode::GetOwnerGlobalForBindings()
|
|
{
|
|
bool dummy;
|
|
auto* window = static_cast<nsGlobalWindow*>(OwnerDoc()->GetScriptHandlingObject(dummy));
|
|
return window ? nsPIDOMWindowOuter::GetFromCurrentInner(window->AsInner()) : nullptr;
|
|
}
|
|
|
|
nsIGlobalObject*
|
|
nsINode::GetOwnerGlobal() const
|
|
{
|
|
bool dummy;
|
|
return OwnerDoc()->GetScriptHandlingObject(dummy);
|
|
}
|
|
|
|
void
|
|
nsINode::ChangeEditableDescendantCount(int32_t aDelta)
|
|
{
|
|
if (aDelta == 0) {
|
|
return;
|
|
}
|
|
|
|
nsSlots* s = Slots();
|
|
MOZ_ASSERT(aDelta > 0 ||
|
|
s->mEditableDescendantCount >= (uint32_t) (-1 * aDelta));
|
|
s->mEditableDescendantCount += aDelta;
|
|
}
|
|
|
|
void
|
|
nsINode::ResetEditableDescendantCount()
|
|
{
|
|
nsSlots* s = GetExistingSlots();
|
|
if (s) {
|
|
s->mEditableDescendantCount = 0;
|
|
}
|
|
}
|
|
|
|
uint32_t
|
|
nsINode::EditableDescendantCount()
|
|
{
|
|
nsSlots* s = GetExistingSlots();
|
|
if (s) {
|
|
return s->mEditableDescendantCount;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
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 |
|
|
NODE_IS_IN_SHADOW_TREE);
|
|
return HasFlag(problematicFlags) ||
|
|
NodeType() == nsIDOMNode::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())) {
|
|
nsIDocument *currentDoc = tmp->GetUncomposedDoc();
|
|
if (currentDoc &&
|
|
nsCCUncollectableMarker::InGeneration(currentDoc->GetMarkedCCGeneration())) {
|
|
return false;
|
|
}
|
|
|
|
if (nsCCUncollectableMarker::sGeneration) {
|
|
// If we're black no need to traverse.
|
|
if (tmp->IsBlack() || tmp->InCCBlackTree()) {
|
|
return false;
|
|
}
|
|
|
|
if (!tmp->UnoptimizableCCNode()) {
|
|
// If we're in a black document, return early.
|
|
if ((currentDoc && currentDoc->IsBlack())) {
|
|
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->IsBlack()) {
|
|
MOZ_ASSERT(parent->IndexOf(tmp) >= 0, "Parent doesn't own us?");
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mNodeInfo)
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_RAWPTR(GetParent())
|
|
|
|
nsSlots *slots = tmp->GetExistingSlots();
|
|
if (slots) {
|
|
slots->Traverse(cb);
|
|
}
|
|
|
|
if (tmp->HasProperties()) {
|
|
nsNodeUtils::TraverseUserData(tmp, cb);
|
|
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));
|
|
}
|
|
}
|
|
}
|
|
|
|
if (tmp->NodeType() != nsIDOMNode::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() != nsIDOMNode::DOCUMENT_NODE &&
|
|
tmp->HasFlag(NODE_HAS_LISTENERMANAGER)) {
|
|
nsContentUtils::RemoveListenerManager(tmp);
|
|
tmp->UnsetFlags(NODE_HAS_LISTENERMANAGER);
|
|
}
|
|
|
|
if (tmp->HasProperties()) {
|
|
nsNodeUtils::UnlinkUserData(tmp);
|
|
tmp->DeleteProperty(nsGkAtoms::keepobjectsalive);
|
|
}
|
|
}
|
|
|
|
static void
|
|
ReleaseURI(void*, /* aObject*/
|
|
nsIAtom*, /* aPropertyName */
|
|
void* aPropertyValue,
|
|
void* /* aData */)
|
|
{
|
|
nsIURI* uri = static_cast<nsIURI*>(aPropertyValue);
|
|
NS_RELEASE(uri);
|
|
}
|
|
|
|
nsresult
|
|
nsINode::SetExplicitBaseURI(nsIURI* aURI)
|
|
{
|
|
nsresult rv = SetProperty(nsGkAtoms::baseURIProperty, aURI, ReleaseURI);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
SetHasExplicitBaseURI();
|
|
NS_ADDREF(aURI);
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
static nsresult
|
|
AdoptNodeIntoOwnerDoc(nsINode *aParent, nsINode *aNode)
|
|
{
|
|
NS_ASSERTION(!aNode->GetParentNode(),
|
|
"Should have removed from parent already");
|
|
|
|
nsIDocument *doc = aParent->OwnerDoc();
|
|
|
|
nsresult rv;
|
|
nsCOMPtr<nsIDOMDocument> domDoc = do_QueryInterface(doc, &rv);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
nsCOMPtr<nsIDOMNode> node = do_QueryInterface(aNode, &rv);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
nsCOMPtr<nsIDOMNode> adoptedNode;
|
|
rv = domDoc->AdoptNode(node, getter_AddRefs(adoptedNode));
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
NS_ASSERTION(aParent->OwnerDoc() == doc,
|
|
"ownerDoc chainged while adopting");
|
|
NS_ASSERTION(adoptedNode == node, "Uh, adopt node changed nodes?");
|
|
NS_ASSERTION(aParent->OwnerDoc() == aNode->OwnerDoc(),
|
|
"ownerDocument changed again after adopting!");
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
static nsresult
|
|
CheckForOutdatedParent(nsINode* aParent, nsINode* aNode)
|
|
{
|
|
if (JSObject* existingObjUnrooted = aNode->GetWrapper()) {
|
|
JS::Rooted<JSObject*> existingObj(RootingCx(), existingObjUnrooted);
|
|
|
|
AutoJSContext cx;
|
|
nsIGlobalObject* global = aParent->OwnerDoc()->GetScopeObject();
|
|
MOZ_ASSERT(global);
|
|
|
|
if (js::GetGlobalForObjectCrossCompartment(existingObj) !=
|
|
global->GetGlobalJSObject()) {
|
|
JSAutoCompartment ac(cx, existingObj);
|
|
nsresult rv = ReparentWrapper(cx, existingObj);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
nsINode::doInsertChildAt(nsIContent* aKid, uint32_t aIndex,
|
|
bool aNotify, nsAttrAndChildArray& aChildArray)
|
|
{
|
|
NS_PRECONDITION(!aKid->GetParentNode(),
|
|
"Inserting node that already has parent");
|
|
nsresult rv;
|
|
|
|
// 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
|
|
nsIDocument* doc = GetUncomposedDoc();
|
|
mozAutoDocUpdate updateBatch(GetComposedDoc(), UPDATE_CONTENT_MODEL, aNotify);
|
|
|
|
if (OwnerDoc() != aKid->OwnerDoc()) {
|
|
rv = AdoptNodeIntoOwnerDoc(this, aKid);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
} else if (OwnerDoc()->DidDocumentOpen()) {
|
|
rv = CheckForOutdatedParent(this, aKid);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
|
|
uint32_t childCount = aChildArray.ChildCount();
|
|
NS_ENSURE_TRUE(aIndex <= childCount, NS_ERROR_ILLEGAL_VALUE);
|
|
bool isAppend = (aIndex == childCount);
|
|
|
|
rv = aChildArray.InsertChildAt(aKid, aIndex);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
if (aIndex == 0) {
|
|
mFirstChild = aKid;
|
|
}
|
|
|
|
nsIContent* parent =
|
|
IsNodeOfType(eDOCUMENT) ? nullptr : static_cast<nsIContent*>(this);
|
|
|
|
rv = aKid->BindToTree(doc, parent,
|
|
parent ? parent->GetBindingParent() : nullptr,
|
|
true);
|
|
if (NS_FAILED(rv)) {
|
|
if (GetFirstChild() == aKid) {
|
|
mFirstChild = aKid->GetNextSibling();
|
|
}
|
|
aChildArray.RemoveChildAt(aIndex);
|
|
aKid->UnbindFromTree();
|
|
return rv;
|
|
}
|
|
|
|
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 && isAppend) {
|
|
nsNodeUtils::ContentAppended(parent, aKid, aIndex);
|
|
} else {
|
|
nsNodeUtils::ContentInserted(this, aKid, aIndex);
|
|
}
|
|
|
|
if (nsContentUtils::HasMutationListeners(aKid,
|
|
NS_EVENT_BITS_MUTATION_NODEINSERTED, this)) {
|
|
InternalMutationEvent mutation(true, eLegacyNodeInserted);
|
|
mutation.mRelatedNode = do_QueryInterface(this);
|
|
|
|
mozAutoSubtreeModified subtree(OwnerDoc(), this);
|
|
(new AsyncEventDispatcher(aKid, mutation))->RunDOMEventWhenSafe();
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
Element*
|
|
nsINode::GetPreviousElementSibling() const
|
|
{
|
|
nsIContent* previousSibling = GetPreviousSibling();
|
|
while (previousSibling) {
|
|
if (previousSibling->IsElement()) {
|
|
return previousSibling->AsElement();
|
|
}
|
|
previousSibling = previousSibling->GetPreviousSibling();
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
Element*
|
|
nsINode::GetNextElementSibling() const
|
|
{
|
|
nsIContent* nextSibling = GetNextSibling();
|
|
while (nextSibling) {
|
|
if (nextSibling->IsElement()) {
|
|
return nextSibling->AsElement();
|
|
}
|
|
nextSibling = nextSibling->GetNextSibling();
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
static already_AddRefed<nsINode>
|
|
GetNodeFromNodeOrString(const OwningNodeOrString& aNode,
|
|
nsIDocument* 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.
|
|
*/
|
|
static already_AddRefed<nsINode>
|
|
ConvertNodesOrStringsIntoNode(const Sequence<OwningNodeOrString>& aNodes,
|
|
nsIDocument* 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<nsINode> node =
|
|
ConvertNodesOrStringsIntoNode(aNodes, OwnerDoc(), 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<nsINode> node =
|
|
ConvertNodesOrStringsIntoNode(aNodes, OwnerDoc(), 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<nsINode> node =
|
|
ConvertNodesOrStringsIntoNode(aNodes, OwnerDoc(), 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;
|
|
}
|
|
int32_t index = parent->IndexOf(this);
|
|
if (index < 0) {
|
|
NS_WARNING("Ignoring call to nsINode::Remove on anonymous child.");
|
|
return;
|
|
}
|
|
parent->RemoveChildAt(uint32_t(index), true);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
void
|
|
nsINode::Prepend(const Sequence<OwningNodeOrString>& aNodes,
|
|
ErrorResult& aRv)
|
|
{
|
|
nsCOMPtr<nsINode> node =
|
|
ConvertNodesOrStringsIntoNode(aNodes, OwnerDoc(), aRv);
|
|
if (aRv.Failed()) {
|
|
return;
|
|
}
|
|
|
|
nsCOMPtr<nsINode> refNode = mFirstChild;
|
|
InsertBefore(*node, refNode, aRv);
|
|
}
|
|
|
|
void
|
|
nsINode::Append(const Sequence<OwningNodeOrString>& aNodes,
|
|
ErrorResult& aRv)
|
|
{
|
|
nsCOMPtr<nsINode> node =
|
|
ConvertNodesOrStringsIntoNode(aNodes, OwnerDoc(), aRv);
|
|
if (aRv.Failed()) {
|
|
return;
|
|
}
|
|
|
|
AppendChild(*node, aRv);
|
|
}
|
|
|
|
void
|
|
nsINode::doRemoveChildAt(uint32_t aIndex, bool aNotify,
|
|
nsIContent* aKid, nsAttrAndChildArray& aChildArray)
|
|
{
|
|
NS_PRECONDITION(aKid && aKid->GetParentNode() == this &&
|
|
aKid == GetChildAt(aIndex) &&
|
|
IndexOf(aKid) == (int32_t)aIndex, "Bogus aKid");
|
|
|
|
nsMutationGuard::DidMutate();
|
|
mozAutoDocUpdate updateBatch(GetComposedDoc(), UPDATE_CONTENT_MODEL, aNotify);
|
|
|
|
nsIContent* previousSibling = aKid->GetPreviousSibling();
|
|
|
|
if (GetFirstChild() == aKid) {
|
|
mFirstChild = aKid->GetNextSibling();
|
|
}
|
|
|
|
aChildArray.RemoveChildAt(aIndex);
|
|
|
|
if (aNotify) {
|
|
nsNodeUtils::ContentRemoved(this, aKid, aIndex, 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.
|
|
static
|
|
bool IsAllowedAsChild(nsIContent* aNewChild, nsINode* aParent,
|
|
bool aIsReplace, nsINode* aRefChild)
|
|
{
|
|
MOZ_ASSERT(aNewChild, "Must have new child");
|
|
MOZ_ASSERT_IF(aIsReplace, aRefChild);
|
|
MOZ_ASSERT(aParent);
|
|
MOZ_ASSERT(aParent->IsNodeOfType(nsINode::eDOCUMENT) ||
|
|
aParent->IsNodeOfType(nsINode::eDOCUMENT_FRAGMENT) ||
|
|
aParent->IsElement(),
|
|
"Nodes that are not documents, document fragments or elements "
|
|
"can't be parents!");
|
|
|
|
// 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->GetShadowRoot()) &&
|
|
nsContentUtils::ContentIsHostIncludingDescendantOf(aParent,
|
|
aNewChild))) {
|
|
return false;
|
|
}
|
|
|
|
// The allowed child nodes differ for documents and elements
|
|
switch (aNewChild->NodeType()) {
|
|
case nsIDOMNode::COMMENT_NODE :
|
|
case nsIDOMNode::PROCESSING_INSTRUCTION_NODE :
|
|
// OK in both cases
|
|
return true;
|
|
case nsIDOMNode::TEXT_NODE :
|
|
case nsIDOMNode::CDATA_SECTION_NODE :
|
|
case nsIDOMNode::ENTITY_REFERENCE_NODE :
|
|
// Allowed under Elements and DocumentFragments
|
|
return aParent->NodeType() != nsIDOMNode::DOCUMENT_NODE;
|
|
case nsIDOMNode::ELEMENT_NODE :
|
|
{
|
|
if (!aParent->IsNodeOfType(nsINode::eDOCUMENT)) {
|
|
// Always ok to have elements under other elements or document fragments
|
|
return true;
|
|
}
|
|
|
|
nsIDocument* parentDocument = static_cast<nsIDocument*>(aParent);
|
|
Element* rootElement = parentDocument->GetRootElement();
|
|
if (rootElement) {
|
|
// Already have a documentElement, so this is only OK if we're
|
|
// replacing it.
|
|
return aIsReplace && rootElement == aRefChild;
|
|
}
|
|
|
|
// 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 true;
|
|
}
|
|
|
|
nsIContent* docTypeContent = parentDocument->GetDoctype();
|
|
if (!docTypeContent) {
|
|
// It's all good.
|
|
return true;
|
|
}
|
|
|
|
int32_t doctypeIndex = aParent->IndexOf(docTypeContent);
|
|
int32_t insertIndex = aParent->IndexOf(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
|
|
return aIsReplace ? (insertIndex >= doctypeIndex) :
|
|
insertIndex > doctypeIndex;
|
|
}
|
|
case nsIDOMNode::DOCUMENT_TYPE_NODE :
|
|
{
|
|
if (!aParent->IsNodeOfType(nsINode::eDOCUMENT)) {
|
|
// doctypes only allowed under documents
|
|
return false;
|
|
}
|
|
|
|
nsIDocument* parentDocument = static_cast<nsIDocument*>(aParent);
|
|
nsIContent* docTypeContent = parentDocument->GetDoctype();
|
|
if (docTypeContent) {
|
|
// Already have a doctype, so this is only OK if we're replacing it
|
|
return aIsReplace && docTypeContent == aRefChild;
|
|
}
|
|
|
|
// 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 true;
|
|
}
|
|
|
|
if (!aRefChild) {
|
|
// Trying to append a doctype, but have a documentElement
|
|
return false;
|
|
}
|
|
|
|
int32_t rootIndex = aParent->IndexOf(rootElement);
|
|
int32_t insertIndex = aParent->IndexOf(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.
|
|
return insertIndex <= rootIndex;
|
|
}
|
|
case nsIDOMNode::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->IsNodeOfType(nsINode::eDOCUMENT)) {
|
|
// All good here
|
|
return true;
|
|
}
|
|
|
|
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
|
|
return false;
|
|
}
|
|
sawElement = true;
|
|
}
|
|
// If we can put this content at the the right place, we might be ok;
|
|
// if not, we bail out.
|
|
if (!IsAllowedAsChild(child, aParent, aIsReplace, aRefChild)) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
// Everything in the fragment checked out ok, so we can stick it in here
|
|
return true;
|
|
}
|
|
default:
|
|
/*
|
|
* aNewChild is of invalid type.
|
|
*/
|
|
break;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
void
|
|
nsINode::EnsurePreInsertionValidity(nsINode& aNewChild, nsINode* aRefChild,
|
|
ErrorResult& aError)
|
|
{
|
|
EnsurePreInsertionValidity1(aNewChild, aRefChild, aError);
|
|
if (aError.Failed()) {
|
|
return;
|
|
}
|
|
EnsurePreInsertionValidity2(false, aNewChild, aRefChild, aError);
|
|
}
|
|
|
|
void
|
|
nsINode::EnsurePreInsertionValidity1(nsINode& aNewChild, nsINode* aRefChild,
|
|
ErrorResult& aError)
|
|
{
|
|
if ((!IsNodeOfType(eDOCUMENT) &&
|
|
!IsNodeOfType(eDOCUMENT_FRAGMENT) &&
|
|
!IsElement()) ||
|
|
!aNewChild.IsNodeOfType(eCONTENT)) {
|
|
aError.Throw(NS_ERROR_DOM_HIERARCHY_REQUEST_ERR);
|
|
return;
|
|
}
|
|
}
|
|
|
|
void
|
|
nsINode::EnsurePreInsertionValidity2(bool aReplace, nsINode& aNewChild,
|
|
nsINode* aRefChild, ErrorResult& aError)
|
|
{
|
|
nsIContent* newContent = aNewChild.AsContent();
|
|
if (newContent->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.
|
|
if (!IsAllowedAsChild(newContent, this, aReplace, aRefChild)) {
|
|
aError.Throw(NS_ERROR_DOM_HIERARCHY_REQUEST_ERR);
|
|
return;
|
|
}
|
|
}
|
|
|
|
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);
|
|
|
|
EnsurePreInsertionValidity1(*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
|
|
{
|
|
// This check happens again further down (though then using IndexOf).
|
|
// We're only checking this here to avoid firing mutation events when
|
|
// none should be fired.
|
|
// It's ok that we do the check twice in the case when firing mutation
|
|
// events as we need to recheck after running script anyway.
|
|
if (aRefChild && aRefChild->GetParentNode() != this) {
|
|
aError.Throw(NS_ERROR_DOM_NOT_FOUND_ERR);
|
|
return nullptr;
|
|
}
|
|
|
|
// 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, OwnerDoc());
|
|
}
|
|
|
|
// If the new node already has a parent, fire for removing from old
|
|
// parent
|
|
nsINode* oldParent = aNewChild->GetParentNode();
|
|
if (oldParent) {
|
|
nsContentUtils::MaybeFireNodeRemoved(aNewChild, oldParent,
|
|
aNewChild->OwnerDoc());
|
|
}
|
|
|
|
// If we're inserting a fragment, fire for all the children of the
|
|
// fragment
|
|
if (nodeType == nsIDOMNode::DOCUMENT_FRAGMENT_NODE) {
|
|
static_cast<FragmentOrElement*>(aNewChild)->FireNodeRemovedForChildren();
|
|
}
|
|
// Verify that our aRefChild is still sensible
|
|
if (aRefChild && aRefChild->GetParentNode() != this) {
|
|
aError.Throw(NS_ERROR_DOM_NOT_FOUND_ERR);
|
|
return nullptr;
|
|
}
|
|
}
|
|
|
|
EnsurePreInsertionValidity2(aReplace, *aNewChild, aRefChild, aError);
|
|
if (aError.Failed()) {
|
|
return nullptr;
|
|
}
|
|
|
|
// Record the node to insert before, if any
|
|
nsINode* nodeToInsertBefore;
|
|
if (aReplace) {
|
|
nodeToInsertBefore = aRefChild->GetNextSibling();
|
|
} else {
|
|
nodeToInsertBefore = aRefChild;
|
|
}
|
|
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) {
|
|
int32_t removeIndex = oldParent->IndexOf(newContent);
|
|
if (removeIndex < 0) {
|
|
// newContent is anonymous. We can't deal with this, so just bail
|
|
NS_ERROR("How come our flags didn't catch this?");
|
|
aError.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
|
|
return nullptr;
|
|
}
|
|
|
|
// 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(),
|
|
UPDATE_CONTENT_MODEL, true);
|
|
nsAutoMutationBatch mb(oldParent, true, true);
|
|
oldParent->RemoveChildAt(removeIndex, true);
|
|
if (nsAutoMutationBatch::GetCurrentBatch() == &mb) {
|
|
mb.RemovalDone();
|
|
mb.SetPrevSibling(oldParent->GetChildAt(removeIndex - 1));
|
|
mb.SetNextSibling(oldParent->GetChildAt(removeIndex));
|
|
}
|
|
}
|
|
|
|
// We expect one mutation (the removal) to have happened.
|
|
if (guard.Mutated(1)) {
|
|
// 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 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.
|
|
if (!IsAllowedAsChild(newContent, this, false, nodeToInsertBefore)) {
|
|
aError.Throw(NS_ERROR_DOM_HIERARCHY_REQUEST_ERR);
|
|
return nullptr;
|
|
}
|
|
} else {
|
|
if ((aRefChild && aRefChild->GetParent() != this) ||
|
|
!IsAllowedAsChild(newContent, this, aReplace, aRefChild)) {
|
|
aError.Throw(NS_ERROR_DOM_HIERARCHY_REQUEST_ERR);
|
|
return nullptr;
|
|
}
|
|
// And recompute nodeToInsertBefore, just in case.
|
|
if (aReplace) {
|
|
nodeToInsertBefore = aRefChild->GetNextSibling();
|
|
} else {
|
|
nodeToInsertBefore = aRefChild;
|
|
}
|
|
}
|
|
}
|
|
} else if (nodeType == nsIDOMNode::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(),
|
|
UPDATE_CONTENT_MODEL, true);
|
|
nsAutoMutationBatch mb(newContent, false, true);
|
|
|
|
for (uint32_t i = count; i > 0;) {
|
|
newContent->RemoveChildAt(--i, 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
|
|
// IsAllowedAsChild 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 {
|
|
nodeToInsertBefore = aRefChild;
|
|
}
|
|
|
|
// And verify that newContent is still allowed as our child. Sadly, we
|
|
// need to reimplement the relevant part of IsAllowedAsChild() because
|
|
// now our nodes are in an array and all. If you change this code,
|
|
// change the code there.
|
|
if (IsNodeOfType(nsINode::eDOCUMENT)) {
|
|
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;
|
|
}
|
|
if (!IsAllowedAsChild(child, this, aReplace, aRefChild)) {
|
|
aError.Throw(NS_ERROR_DOM_HIERARCHY_REQUEST_ERR);
|
|
return nullptr;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
mozAutoDocUpdate batch(GetComposedDoc(), UPDATE_CONTENT_MODEL, true);
|
|
nsAutoMutationBatch mb;
|
|
|
|
// Figure out which index we want to insert at. Note that we use
|
|
// nodeToInsertBefore to determine this, because it's possible that
|
|
// aRefChild == aNewChild, in which case we just removed it from the
|
|
// parent list.
|
|
int32_t insPos;
|
|
if (nodeToInsertBefore) {
|
|
insPos = IndexOf(nodeToInsertBefore);
|
|
if (insPos < 0) {
|
|
// XXXbz How the heck would _that_ happen, exactly?
|
|
aError.Throw(NS_ERROR_DOM_NOT_FOUND_ERR);
|
|
return nullptr;
|
|
}
|
|
}
|
|
else {
|
|
insPos = GetChildCount();
|
|
}
|
|
|
|
// 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");
|
|
|
|
// An since nodeToInsertBefore is at index insPos, we want to remove
|
|
// at the previous index.
|
|
NS_ASSERTION(insPos >= 1, "insPos too small");
|
|
RemoveChildAt(insPos-1, true);
|
|
--insPos;
|
|
}
|
|
|
|
// 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().
|
|
nsIDocument* doc = OwnerDoc();
|
|
if (doc != newContent->OwnerDoc()) {
|
|
aError = AdoptNodeIntoOwnerDoc(this, aNewChild);
|
|
if (aError.Failed()) {
|
|
return nullptr;
|
|
}
|
|
} else if (doc->DidDocumentOpen()) {
|
|
aError = CheckForOutdatedParent(this, aNewChild);
|
|
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 == nsIDOMNode::DOCUMENT_FRAGMENT_NODE) {
|
|
if (!aReplace) {
|
|
mb.Init(this, true, true);
|
|
}
|
|
nsAutoMutationBatch* mutationBatch = nsAutoMutationBatch::GetCurrentBatch();
|
|
if (mutationBatch) {
|
|
mutationBatch->RemovalDone();
|
|
mutationBatch->SetPrevSibling(GetChildAt(insPos - 1));
|
|
mutationBatch->SetNextSibling(GetChildAt(insPos));
|
|
}
|
|
|
|
uint32_t count = fragChildren->Length();
|
|
if (!count) {
|
|
return result;
|
|
}
|
|
|
|
bool appending =
|
|
!IsNodeOfType(eDOCUMENT) && uint32_t(insPos) == GetChildCount();
|
|
int32_t firstInsPos = insPos;
|
|
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, ++insPos) {
|
|
// XXXbz how come no reparenting here? That seems odd...
|
|
// Insert the child.
|
|
aError = InsertChildAt(fragChildren->ElementAt(i), insPos,
|
|
!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,
|
|
firstInsPos);
|
|
}
|
|
return nullptr;
|
|
}
|
|
}
|
|
|
|
if (mutationBatch && !appending) {
|
|
mutationBatch->NodesAdded();
|
|
}
|
|
|
|
// Notify and fire mutation events when appending
|
|
if (appending) {
|
|
nsNodeUtils::ContentAppended(static_cast<nsIContent*>(this),
|
|
firstInsertedContent, firstInsPos);
|
|
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(GetChildAt(insPos - 1));
|
|
mb.SetNextSibling(GetChildAt(insPos));
|
|
}
|
|
aError = InsertChildAt(newContent, insPos, 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);
|
|
}
|
|
}
|
|
|
|
void
|
|
nsINode::GetBoundMutationObservers(nsTArray<RefPtr<nsDOMMutationObserver> >& aResult)
|
|
{
|
|
nsCOMArray<nsISupports>* objects =
|
|
static_cast<nsCOMArray<nsISupports>*>(GetProperty(nsGkAtoms::keepobjectsalive));
|
|
if (objects) {
|
|
for (int32_t i = 0; i < objects->Count(); ++i) {
|
|
nsCOMPtr<nsDOMMutationObserver> mo = do_QueryInterface(objects->ObjectAt(i));
|
|
if (mo) {
|
|
MOZ_ASSERT(!aResult.Contains(mo));
|
|
aResult.AppendElement(mo.forget());
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
already_AddRefed<AccessibleNode>
|
|
nsINode::GetAccessibleNode()
|
|
{
|
|
#ifdef ACCESSIBILITY
|
|
RefPtr<AccessibleNode> anode = new AccessibleNode(this);
|
|
return anode.forget();
|
|
#endif
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
size_t
|
|
nsINode::SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const
|
|
{
|
|
size_t n = 0;
|
|
EventListenerManager* elm = GetExistingListenerManager();
|
|
if (elm) {
|
|
n += elm->SizeOfIncludingThis(aMallocSizeOf);
|
|
}
|
|
|
|
// 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, mPreviousSibling, mFirstChild: because they're
|
|
// non-owning
|
|
return n;
|
|
}
|
|
|
|
#define EVENT(name_, id_, type_, struct_) \
|
|
EventHandlerNonNull* nsINode::GetOn##name_() { \
|
|
EventListenerManager *elm = GetExistingListenerManager(); \
|
|
return elm ? elm->GetEventHandler(nsGkAtoms::on##name_, EmptyString()) \
|
|
: nullptr; \
|
|
} \
|
|
void nsINode::SetOn##name_(EventHandlerNonNull* handler) \
|
|
{ \
|
|
EventListenerManager *elm = GetOrCreateListenerManager(); \
|
|
if (elm) { \
|
|
elm->SetEventHandler(nsGkAtoms::on##name_, EmptyString(), handler); \
|
|
} \
|
|
}
|
|
#define TOUCH_EVENT EVENT
|
|
#define DOCUMENT_ONLY_EVENT EVENT
|
|
#include "mozilla/EventNameList.h"
|
|
#undef DOCUMENT_ONLY_EVENT
|
|
#undef TOUCH_EVENT
|
|
#undef EVENT
|
|
|
|
bool
|
|
nsINode::Contains(const nsINode* aOther) const
|
|
{
|
|
if (aOther == this) {
|
|
return true;
|
|
}
|
|
if (!aOther ||
|
|
OwnerDoc() != aOther->OwnerDoc() ||
|
|
IsInUncomposedDoc() != aOther->IsInUncomposedDoc() ||
|
|
!(aOther->IsElement() ||
|
|
aOther->IsNodeOfType(nsINode::eCONTENT)) ||
|
|
!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() && !IsNodeOfType(nsINode::eDOCUMENT_FRAGMENT)) {
|
|
return false;
|
|
}
|
|
|
|
const nsIContent* thisContent = static_cast<const nsIContent*>(this);
|
|
if (thisContent->GetBindingParent() != other->GetBindingParent()) {
|
|
return false;
|
|
}
|
|
|
|
return nsContentUtils::ContentIsDescendantOf(other, this);
|
|
}
|
|
|
|
uint32_t
|
|
nsINode::Length() const
|
|
{
|
|
switch (NodeType()) {
|
|
case nsIDOMNode::DOCUMENT_TYPE_NODE:
|
|
return 0;
|
|
|
|
case nsIDOMNode::TEXT_NODE:
|
|
case nsIDOMNode::CDATA_SECTION_NODE:
|
|
case nsIDOMNode::PROCESSING_INSTRUCTION_NODE:
|
|
case nsIDOMNode::COMMENT_NODE:
|
|
MOZ_ASSERT(IsNodeOfType(eCONTENT));
|
|
return static_cast<const nsIContent*>(this)->TextLength();
|
|
|
|
default:
|
|
return GetChildCount();
|
|
}
|
|
}
|
|
|
|
nsCSSSelectorList*
|
|
nsINode::ParseSelectorList(const nsAString& aSelectorString,
|
|
ErrorResult& aRv)
|
|
{
|
|
nsIDocument* doc = OwnerDoc();
|
|
nsIDocument::SelectorCache& cache = doc->GetSelectorCache();
|
|
nsCSSSelectorList* selectorList = nullptr;
|
|
bool haveCachedList = cache.GetList(aSelectorString, &selectorList);
|
|
if (haveCachedList) {
|
|
if (!selectorList) {
|
|
// Invalid selector.
|
|
aRv.ThrowDOMException(NS_ERROR_DOM_SYNTAX_ERR,
|
|
NS_LITERAL_CSTRING("'") + NS_ConvertUTF16toUTF8(aSelectorString) +
|
|
NS_LITERAL_CSTRING("' is not a valid selector")
|
|
);
|
|
}
|
|
return selectorList;
|
|
}
|
|
|
|
nsCSSParser parser(doc->CSSLoader());
|
|
|
|
aRv = parser.ParseSelectorString(aSelectorString,
|
|
doc->GetDocumentURI(),
|
|
0, // XXXbz get the line number!
|
|
&selectorList);
|
|
if (aRv.Failed()) {
|
|
// We hit this for syntax errors, which are quite common, so don't
|
|
// use NS_ENSURE_SUCCESS. (For example, jQuery has an extended set
|
|
// of selectors, but it sees if we can parse them first.)
|
|
MOZ_ASSERT(aRv.ErrorCodeIs(NS_ERROR_DOM_SYNTAX_ERR),
|
|
"Unexpected error, so cached version won't return it");
|
|
|
|
// Change the error message to match above.
|
|
aRv.ThrowDOMException(NS_ERROR_DOM_SYNTAX_ERR,
|
|
NS_LITERAL_CSTRING("'") + NS_ConvertUTF16toUTF8(aSelectorString) +
|
|
NS_LITERAL_CSTRING("' is not a valid selector")
|
|
);
|
|
|
|
cache.CacheList(aSelectorString, nullptr);
|
|
return nullptr;
|
|
}
|
|
|
|
// Filter out pseudo-element selectors from selectorList
|
|
nsCSSSelectorList** slot = &selectorList;
|
|
do {
|
|
nsCSSSelectorList* cur = *slot;
|
|
if (cur->mSelectors->IsPseudoElement()) {
|
|
*slot = cur->mNext;
|
|
cur->mNext = nullptr;
|
|
delete cur;
|
|
} else {
|
|
slot = &cur->mNext;
|
|
}
|
|
} while (*slot);
|
|
|
|
if (selectorList) {
|
|
NS_ASSERTION(selectorList->mSelectors,
|
|
"How can we not have any selectors?");
|
|
cache.CacheList(aSelectorString, selectorList);
|
|
} else {
|
|
// This is the "only pseudo-element selectors" case, which is
|
|
// not common, so just don't worry about caching it. That way a
|
|
// null cached value can always indicate an invalid selector.
|
|
}
|
|
|
|
return selectorList;
|
|
}
|
|
|
|
static void
|
|
AddScopeElements(TreeMatchContext& aMatchContext,
|
|
nsINode* aMatchContextNode)
|
|
{
|
|
if (aMatchContextNode->IsElement()) {
|
|
aMatchContext.SetHasSpecifiedScope();
|
|
aMatchContext.AddScopeElement(aMatchContextNode->AsElement());
|
|
}
|
|
}
|
|
|
|
namespace {
|
|
struct SelectorMatchInfo {
|
|
nsCSSSelectorList* const mSelectorList;
|
|
TreeMatchContext& mMatchContext;
|
|
};
|
|
} // namespace
|
|
|
|
// Given an id, find elements with that id under aRoot that match aMatchInfo if
|
|
// any is provided. If no SelectorMatchInfo is provided, just find the ones
|
|
// with the given id. aRoot must be in the document.
|
|
template<bool onlyFirstMatch, class T>
|
|
inline static void
|
|
FindMatchingElementsWithId(const nsAString& aId, nsINode* aRoot,
|
|
SelectorMatchInfo* aMatchInfo,
|
|
T& aList)
|
|
{
|
|
MOZ_ASSERT(aRoot->IsInUncomposedDoc(),
|
|
"Don't call me if the root is not in the document");
|
|
MOZ_ASSERT(aRoot->IsElement() || aRoot->IsNodeOfType(nsINode::eDOCUMENT),
|
|
"The optimization below to check ContentIsDescendantOf only for "
|
|
"elements depends on aRoot being either an element or a "
|
|
"document if it's in the document. Note that document fragments "
|
|
"can't be IsInUncomposedDoc(), so should never show up here.");
|
|
|
|
const nsTArray<Element*>* elements = aRoot->OwnerDoc()->GetAllElementsForId(aId);
|
|
if (!elements) {
|
|
// Nothing to do; we're done
|
|
return;
|
|
}
|
|
|
|
// XXXbz: Should we fall back to the tree walk if aRoot is not the
|
|
// document and |elements| is long, for some value of "long"?
|
|
for (size_t i = 0; i < elements->Length(); ++i) {
|
|
Element* element = (*elements)[i];
|
|
if (!aRoot->IsElement() ||
|
|
(element != aRoot &&
|
|
nsContentUtils::ContentIsDescendantOf(element, aRoot))) {
|
|
// We have an element with the right id and it's a strict descendant
|
|
// of aRoot. Make sure it really matches the selector.
|
|
if (!aMatchInfo ||
|
|
nsCSSRuleProcessor::SelectorListMatches(element,
|
|
aMatchInfo->mMatchContext,
|
|
aMatchInfo->mSelectorList)) {
|
|
aList.AppendElement(element);
|
|
if (onlyFirstMatch) {
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Actually find elements matching aSelectorList (which must not be
|
|
// null) and which are descendants of aRoot and put them in aList. If
|
|
// onlyFirstMatch, then stop once the first one is found.
|
|
template<bool onlyFirstMatch, class Collector, class T>
|
|
MOZ_ALWAYS_INLINE static void
|
|
FindMatchingElements(nsINode* aRoot, nsCSSSelectorList* aSelectorList, T &aList,
|
|
ErrorResult& aRv)
|
|
{
|
|
nsIDocument* doc = aRoot->OwnerDoc();
|
|
|
|
TreeMatchContext matchingContext(false, nsRuleWalker::eRelevantLinkUnvisited,
|
|
doc, TreeMatchContext::eNeverMatchVisited);
|
|
doc->FlushPendingLinkUpdates();
|
|
AddScopeElements(matchingContext, aRoot);
|
|
|
|
// Fast-path selectors involving IDs. We can only do this if aRoot
|
|
// is in the document and the document is not in quirks mode, since
|
|
// ID selectors are case-insensitive in quirks mode. Also, only do
|
|
// this if aSelectorList only has one selector, because otherwise
|
|
// ordering the elements correctly is a pain.
|
|
NS_ASSERTION(aRoot->IsElement() || aRoot->IsNodeOfType(nsINode::eDOCUMENT) ||
|
|
!aRoot->IsInUncomposedDoc(),
|
|
"The optimization below to check ContentIsDescendantOf only for "
|
|
"elements depends on aRoot being either an element or a "
|
|
"document if it's in the document.");
|
|
if (aRoot->IsInUncomposedDoc() &&
|
|
doc->GetCompatibilityMode() != eCompatibility_NavQuirks &&
|
|
!aSelectorList->mNext &&
|
|
aSelectorList->mSelectors->mIDList) {
|
|
nsIAtom* id = aSelectorList->mSelectors->mIDList->mAtom;
|
|
SelectorMatchInfo info = { aSelectorList, matchingContext };
|
|
FindMatchingElementsWithId<onlyFirstMatch, T>(nsDependentAtomString(id),
|
|
aRoot, &info, aList);
|
|
return;
|
|
}
|
|
|
|
Collector results;
|
|
for (nsIContent* cur = aRoot->GetFirstChild();
|
|
cur;
|
|
cur = cur->GetNextNode(aRoot)) {
|
|
if (cur->IsElement() &&
|
|
nsCSSRuleProcessor::SelectorListMatches(cur->AsElement(),
|
|
matchingContext,
|
|
aSelectorList)) {
|
|
if (onlyFirstMatch) {
|
|
aList.AppendElement(cur->AsElement());
|
|
return;
|
|
}
|
|
results.AppendElement(cur->AsElement());
|
|
}
|
|
}
|
|
|
|
const uint32_t len = results.Length();
|
|
if (len) {
|
|
aList.SetCapacity(len);
|
|
for (uint32_t i = 0; i < len; ++i) {
|
|
aList.AppendElement(results.ElementAt(i));
|
|
}
|
|
}
|
|
}
|
|
|
|
struct ElementHolder {
|
|
ElementHolder() : mElement(nullptr) {}
|
|
void AppendElement(Element* aElement) {
|
|
MOZ_ASSERT(!mElement, "Should only get one element");
|
|
mElement = aElement;
|
|
}
|
|
void SetCapacity(uint32_t aCapacity) { MOZ_CRASH("Don't call me!"); }
|
|
uint32_t Length() { return 0; }
|
|
Element* ElementAt(uint32_t aIndex) { return nullptr; }
|
|
|
|
Element* mElement;
|
|
};
|
|
|
|
Element*
|
|
nsINode::QuerySelector(const nsAString& aSelector, ErrorResult& aResult)
|
|
{
|
|
nsCSSSelectorList* selectorList = ParseSelectorList(aSelector, aResult);
|
|
if (!selectorList) {
|
|
// Either we failed (and aResult already has the exception), or this
|
|
// is a pseudo-element-only selector that matches nothing.
|
|
return nullptr;
|
|
}
|
|
ElementHolder holder;
|
|
FindMatchingElements<true, ElementHolder>(this, selectorList, holder, aResult);
|
|
return holder.mElement;
|
|
}
|
|
|
|
already_AddRefed<nsINodeList>
|
|
nsINode::QuerySelectorAll(const nsAString& aSelector, ErrorResult& aResult)
|
|
{
|
|
RefPtr<nsSimpleContentList> contentList = new nsSimpleContentList(this);
|
|
|
|
nsCSSSelectorList* selectorList = ParseSelectorList(aSelector, aResult);
|
|
if (selectorList) {
|
|
FindMatchingElements<false, AutoTArray<Element*, 128>>(this,
|
|
selectorList,
|
|
*contentList,
|
|
aResult);
|
|
} else {
|
|
// Either we failed (and aResult already has the exception), or this
|
|
// is a pseudo-element-only selector that matches nothing.
|
|
}
|
|
|
|
return contentList.forget();
|
|
}
|
|
|
|
Element*
|
|
nsINode::GetElementById(const nsAString& aId)
|
|
{
|
|
MOZ_ASSERT(IsElement() || IsNodeOfType(eDOCUMENT_FRAGMENT),
|
|
"Bogus this object for GetElementById call");
|
|
if (IsInUncomposedDoc()) {
|
|
ElementHolder holder;
|
|
FindMatchingElementsWithId<true>(aId, this, nullptr, holder);
|
|
return holder.mElement;
|
|
}
|
|
|
|
for (nsIContent* kid = GetFirstChild(); kid; kid = kid->GetNextNode(this)) {
|
|
if (!kid->IsElement()) {
|
|
continue;
|
|
}
|
|
nsIAtom* 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::IsCallerChrome()) {
|
|
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::GetObjectCompartment(obj)));
|
|
return obj;
|
|
}
|
|
|
|
already_AddRefed<nsINode>
|
|
nsINode::CloneNode(bool aDeep, ErrorResult& aError)
|
|
{
|
|
nsCOMPtr<nsINode> result;
|
|
aError = nsNodeUtils::CloneNodeImpl(this, aDeep, getter_AddRefs(result));
|
|
return result.forget();
|
|
}
|
|
|
|
nsDOMAttributeMap*
|
|
nsINode::GetAttributes()
|
|
{
|
|
if (!IsElement()) {
|
|
return nullptr;
|
|
}
|
|
return AsElement()->Attributes();
|
|
}
|
|
|
|
Element*
|
|
nsINode::GetParentElementCrossingShadowRoot() const
|
|
{
|
|
if (!mParent) {
|
|
return nullptr;
|
|
}
|
|
|
|
if (mParent->IsElement()) {
|
|
return mParent->AsElement();
|
|
}
|
|
|
|
ShadowRoot* shadowRoot = ShadowRoot::FromNode(mParent);
|
|
if (shadowRoot) {
|
|
nsIContent* host = shadowRoot->GetHost();
|
|
MOZ_ASSERT(host, "ShowRoots should always have a host");
|
|
MOZ_ASSERT(host->IsElement(), "ShadowRoot hosts should always be Elements");
|
|
return host->AsElement();
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
bool
|
|
nsINode::HasBoxQuadsSupport(JSContext* aCx, JSObject* /* unused */)
|
|
{
|
|
return xpc::AccessCheck::isChrome(js::GetContextCompartment(aCx)) ||
|
|
Preferences::GetBool("layout.css.getBoxQuads.enabled");
|
|
}
|
|
|
|
nsINode*
|
|
nsINode::GetScopeChainParent() const
|
|
{
|
|
return nullptr;
|
|
}
|
|
|
|
void
|
|
nsINode::AddAnimationObserver(nsIAnimationObserver* aAnimationObserver)
|
|
{
|
|
AddMutationObserver(aAnimationObserver);
|
|
OwnerDoc()->SetMayHaveAnimationObservers();
|
|
}
|
|
|
|
void
|
|
nsINode::AddAnimationObserverUnlessExists(
|
|
nsIAnimationObserver* aAnimationObserver)
|
|
{
|
|
AddMutationObserverUnlessExists(aAnimationObserver);
|
|
OwnerDoc()->SetMayHaveAnimationObservers();
|
|
}
|
|
|
|
bool
|
|
nsINode::IsApzAware() const
|
|
{
|
|
return IsNodeApzAware();
|
|
}
|
|
|
|
bool
|
|
nsINode::IsNodeApzAwareInternal() const
|
|
{
|
|
return EventTarget::IsApzAware();
|
|
}
|
|
|
|
#ifdef MOZ_STYLO
|
|
bool
|
|
nsINode::IsStyledByServo() const
|
|
{
|
|
return OwnerDoc()->IsStyledByServo();
|
|
}
|
|
#endif
|