1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/base/src/nsINode.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,2695 @@
1.4 +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* vim: set ts=8 sts=2 et sw=2 tw=80: */
1.6 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +/*
1.11 + * Base class for all DOM nodes.
1.12 + */
1.13 +
1.14 +#include "nsINode.h"
1.15 +
1.16 +#include "AccessCheck.h"
1.17 +#include "jsapi.h"
1.18 +#include "mozAutoDocUpdate.h"
1.19 +#include "mozilla/AsyncEventDispatcher.h"
1.20 +#include "mozilla/CORSMode.h"
1.21 +#include "mozilla/EventDispatcher.h"
1.22 +#include "mozilla/EventListenerManager.h"
1.23 +#include "mozilla/InternalMutationEvent.h"
1.24 +#include "mozilla/Likely.h"
1.25 +#include "mozilla/MemoryReporting.h"
1.26 +#include "mozilla/Telemetry.h"
1.27 +#include "mozilla/dom/Element.h"
1.28 +#include "mozilla/dom/Event.h"
1.29 +#include "mozilla/dom/ShadowRoot.h"
1.30 +#include "nsAttrValueOrString.h"
1.31 +#include "nsBindingManager.h"
1.32 +#include "nsCCUncollectableMarker.h"
1.33 +#include "nsContentCreatorFunctions.h"
1.34 +#include "nsContentList.h"
1.35 +#include "nsContentUtils.h"
1.36 +#include "nsCycleCollectionParticipant.h"
1.37 +#include "nsDocument.h"
1.38 +#include "mozilla/dom/Attr.h"
1.39 +#include "nsDOMAttributeMap.h"
1.40 +#include "nsDOMCID.h"
1.41 +#include "nsDOMCSSAttrDeclaration.h"
1.42 +#include "nsError.h"
1.43 +#include "nsDOMMutationObserver.h"
1.44 +#include "nsDOMString.h"
1.45 +#include "nsDOMTokenList.h"
1.46 +#include "nsFocusManager.h"
1.47 +#include "nsFrameManager.h"
1.48 +#include "nsFrameSelection.h"
1.49 +#include "nsGenericHTMLElement.h"
1.50 +#include "nsGkAtoms.h"
1.51 +#include "nsIAnonymousContentCreator.h"
1.52 +#include "nsIAtom.h"
1.53 +#include "nsIBaseWindow.h"
1.54 +#include "nsICategoryManager.h"
1.55 +#include "nsIContentIterator.h"
1.56 +#include "nsIControllers.h"
1.57 +#include "nsIDocument.h"
1.58 +#include "nsIDOMDocument.h"
1.59 +#include "nsIDOMDocumentType.h"
1.60 +#include "nsIDOMEvent.h"
1.61 +#include "nsIDOMEventListener.h"
1.62 +#include "nsIDOMMutationEvent.h"
1.63 +#include "nsIDOMNodeList.h"
1.64 +#include "nsIDOMUserDataHandler.h"
1.65 +#include "nsIEditor.h"
1.66 +#include "nsIEditorIMESupport.h"
1.67 +#include "nsILinkHandler.h"
1.68 +#include "nsINodeInfo.h"
1.69 +#include "nsIPresShell.h"
1.70 +#include "nsIScriptError.h"
1.71 +#include "nsIScriptGlobalObject.h"
1.72 +#include "nsIScriptSecurityManager.h"
1.73 +#include "nsIScrollableFrame.h"
1.74 +#include "nsIServiceManager.h"
1.75 +#include "nsIURL.h"
1.76 +#include "nsView.h"
1.77 +#include "nsViewManager.h"
1.78 +#include "nsIWebNavigation.h"
1.79 +#include "nsIWidget.h"
1.80 +#include "nsLayoutUtils.h"
1.81 +#include "nsNameSpaceManager.h"
1.82 +#include "nsNetUtil.h"
1.83 +#include "nsNodeInfoManager.h"
1.84 +#include "nsNodeUtils.h"
1.85 +#include "nsPIBoxObject.h"
1.86 +#include "nsPIDOMWindow.h"
1.87 +#include "nsPresContext.h"
1.88 +#include "nsRuleProcessorData.h"
1.89 +#include "nsString.h"
1.90 +#include "nsStyleConsts.h"
1.91 +#include "nsSVGFeatures.h"
1.92 +#include "nsSVGUtils.h"
1.93 +#include "nsTextNode.h"
1.94 +#include "nsUnicharUtils.h"
1.95 +#include "nsXBLBinding.h"
1.96 +#include "nsXBLPrototypeBinding.h"
1.97 +#include "prprf.h"
1.98 +#include "xpcpublic.h"
1.99 +#include "nsCSSRuleProcessor.h"
1.100 +#include "nsCSSParser.h"
1.101 +#include "HTMLLegendElement.h"
1.102 +#include "nsWrapperCacheInlines.h"
1.103 +#include "WrapperFactory.h"
1.104 +#include "DocumentType.h"
1.105 +#include <algorithm>
1.106 +#include "nsGlobalWindow.h"
1.107 +#include "nsDOMMutationObserver.h"
1.108 +#include "GeometryUtils.h"
1.109 +
1.110 +using namespace mozilla;
1.111 +using namespace mozilla::dom;
1.112 +
1.113 +nsINode::nsSlots::~nsSlots()
1.114 +{
1.115 + if (mChildNodes) {
1.116 + mChildNodes->DropReference();
1.117 + NS_RELEASE(mChildNodes);
1.118 + }
1.119 +
1.120 + if (mWeakReference) {
1.121 + mWeakReference->NoticeNodeDestruction();
1.122 + }
1.123 +}
1.124 +
1.125 +void
1.126 +nsINode::nsSlots::Traverse(nsCycleCollectionTraversalCallback &cb)
1.127 +{
1.128 + NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mSlots->mChildNodes");
1.129 + cb.NoteXPCOMChild(mChildNodes);
1.130 +}
1.131 +
1.132 +void
1.133 +nsINode::nsSlots::Unlink()
1.134 +{
1.135 + if (mChildNodes) {
1.136 + mChildNodes->DropReference();
1.137 + NS_RELEASE(mChildNodes);
1.138 + }
1.139 +}
1.140 +
1.141 +//----------------------------------------------------------------------
1.142 +
1.143 +nsINode::~nsINode()
1.144 +{
1.145 + MOZ_ASSERT(!HasSlots(), "nsNodeUtils::LastRelease was not called?");
1.146 + MOZ_ASSERT(mSubtreeRoot == this, "Didn't restore state properly?");
1.147 +}
1.148 +
1.149 +void*
1.150 +nsINode::GetProperty(uint16_t aCategory, nsIAtom *aPropertyName,
1.151 + nsresult *aStatus) const
1.152 +{
1.153 + return OwnerDoc()->PropertyTable(aCategory)->GetProperty(this, aPropertyName,
1.154 + aStatus);
1.155 +}
1.156 +
1.157 +nsresult
1.158 +nsINode::SetProperty(uint16_t aCategory, nsIAtom *aPropertyName, void *aValue,
1.159 + NSPropertyDtorFunc aDtor, bool aTransfer,
1.160 + void **aOldValue)
1.161 +{
1.162 + nsresult rv = OwnerDoc()->PropertyTable(aCategory)->SetProperty(this,
1.163 + aPropertyName,
1.164 + aValue, aDtor,
1.165 + nullptr,
1.166 + aTransfer,
1.167 + aOldValue);
1.168 + if (NS_SUCCEEDED(rv)) {
1.169 + SetFlags(NODE_HAS_PROPERTIES);
1.170 + }
1.171 +
1.172 + return rv;
1.173 +}
1.174 +
1.175 +void
1.176 +nsINode::DeleteProperty(uint16_t aCategory, nsIAtom *aPropertyName)
1.177 +{
1.178 + OwnerDoc()->PropertyTable(aCategory)->DeleteProperty(this, aPropertyName);
1.179 +}
1.180 +
1.181 +void*
1.182 +nsINode::UnsetProperty(uint16_t aCategory, nsIAtom *aPropertyName,
1.183 + nsresult *aStatus)
1.184 +{
1.185 + return OwnerDoc()->PropertyTable(aCategory)->UnsetProperty(this,
1.186 + aPropertyName,
1.187 + aStatus);
1.188 +}
1.189 +
1.190 +nsINode::nsSlots*
1.191 +nsINode::CreateSlots()
1.192 +{
1.193 + return new nsSlots();
1.194 +}
1.195 +
1.196 +bool
1.197 +nsINode::IsEditableInternal() const
1.198 +{
1.199 + if (HasFlag(NODE_IS_EDITABLE)) {
1.200 + // The node is in an editable contentEditable subtree.
1.201 + return true;
1.202 + }
1.203 +
1.204 + nsIDocument *doc = GetCurrentDoc();
1.205 +
1.206 + // Check if the node is in a document and the document is in designMode.
1.207 + return doc && doc->HasFlag(NODE_IS_EDITABLE);
1.208 +}
1.209 +
1.210 +static nsIContent* GetEditorRootContent(nsIEditor* aEditor)
1.211 +{
1.212 + nsCOMPtr<nsIDOMElement> rootElement;
1.213 + aEditor->GetRootElement(getter_AddRefs(rootElement));
1.214 + nsCOMPtr<nsIContent> rootContent(do_QueryInterface(rootElement));
1.215 + return rootContent;
1.216 +}
1.217 +
1.218 +nsIContent*
1.219 +nsINode::GetTextEditorRootContent(nsIEditor** aEditor)
1.220 +{
1.221 + if (aEditor)
1.222 + *aEditor = nullptr;
1.223 + for (nsINode* node = this; node; node = node->GetParentNode()) {
1.224 + if (!node->IsElement() ||
1.225 + !node->AsElement()->IsHTML())
1.226 + continue;
1.227 +
1.228 + nsCOMPtr<nsIEditor> editor =
1.229 + static_cast<nsGenericHTMLElement*>(node)->GetEditorInternal();
1.230 + if (!editor)
1.231 + continue;
1.232 +
1.233 + nsIContent* rootContent = GetEditorRootContent(editor);
1.234 + if (aEditor)
1.235 + editor.swap(*aEditor);
1.236 + return rootContent;
1.237 + }
1.238 + return nullptr;
1.239 +}
1.240 +
1.241 +static nsIContent* GetRootForContentSubtree(nsIContent* aContent)
1.242 +{
1.243 + NS_ENSURE_TRUE(aContent, nullptr);
1.244 +
1.245 + // Special case for ShadowRoot because the ShadowRoot itself is
1.246 + // the root. This is necessary to prevent selection from crossing
1.247 + // the ShadowRoot boundary.
1.248 + ShadowRoot* containingShadow = aContent->GetContainingShadow();
1.249 + if (containingShadow) {
1.250 + return containingShadow;
1.251 + }
1.252 +
1.253 + nsIContent* stop = aContent->GetBindingParent();
1.254 + while (aContent) {
1.255 + nsIContent* parent = aContent->GetParent();
1.256 + if (parent == stop) {
1.257 + break;
1.258 + }
1.259 + aContent = parent;
1.260 + }
1.261 + return aContent;
1.262 +}
1.263 +
1.264 +nsIContent*
1.265 +nsINode::GetSelectionRootContent(nsIPresShell* aPresShell)
1.266 +{
1.267 + NS_ENSURE_TRUE(aPresShell, nullptr);
1.268 +
1.269 + if (IsNodeOfType(eDOCUMENT))
1.270 + return static_cast<nsIDocument*>(this)->GetRootElement();
1.271 + if (!IsNodeOfType(eCONTENT))
1.272 + return nullptr;
1.273 +
1.274 + if (GetCurrentDoc() != aPresShell->GetDocument()) {
1.275 + return nullptr;
1.276 + }
1.277 +
1.278 + if (static_cast<nsIContent*>(this)->HasIndependentSelection()) {
1.279 + // This node should be a descendant of input/textarea editor.
1.280 + nsIContent* content = GetTextEditorRootContent();
1.281 + if (content)
1.282 + return content;
1.283 + }
1.284 +
1.285 + nsPresContext* presContext = aPresShell->GetPresContext();
1.286 + if (presContext) {
1.287 + nsIEditor* editor = nsContentUtils::GetHTMLEditor(presContext);
1.288 + if (editor) {
1.289 + // This node is in HTML editor.
1.290 + nsIDocument* doc = GetCurrentDoc();
1.291 + if (!doc || doc->HasFlag(NODE_IS_EDITABLE) ||
1.292 + !HasFlag(NODE_IS_EDITABLE)) {
1.293 + nsIContent* editorRoot = GetEditorRootContent(editor);
1.294 + NS_ENSURE_TRUE(editorRoot, nullptr);
1.295 + return nsContentUtils::IsInSameAnonymousTree(this, editorRoot) ?
1.296 + editorRoot :
1.297 + GetRootForContentSubtree(static_cast<nsIContent*>(this));
1.298 + }
1.299 + // If the document isn't editable but this is editable, this is in
1.300 + // contenteditable. Use the editing host element for selection root.
1.301 + return static_cast<nsIContent*>(this)->GetEditingHost();
1.302 + }
1.303 + }
1.304 +
1.305 + nsRefPtr<nsFrameSelection> fs = aPresShell->FrameSelection();
1.306 + nsIContent* content = fs->GetLimiter();
1.307 + if (!content) {
1.308 + content = fs->GetAncestorLimiter();
1.309 + if (!content) {
1.310 + nsIDocument* doc = aPresShell->GetDocument();
1.311 + NS_ENSURE_TRUE(doc, nullptr);
1.312 + content = doc->GetRootElement();
1.313 + if (!content)
1.314 + return nullptr;
1.315 + }
1.316 + }
1.317 +
1.318 + // This node might be in another subtree, if so, we should find this subtree's
1.319 + // root. Otherwise, we can return the content simply.
1.320 + NS_ENSURE_TRUE(content, nullptr);
1.321 + if (!nsContentUtils::IsInSameAnonymousTree(this, content)) {
1.322 + content = GetRootForContentSubtree(static_cast<nsIContent*>(this));
1.323 + // Fixup for ShadowRoot because the ShadowRoot itself does not have a frame.
1.324 + // Use the host as the root.
1.325 + ShadowRoot* shadowRoot = ShadowRoot::FromNode(content);
1.326 + if (shadowRoot) {
1.327 + content = shadowRoot->GetHost();
1.328 + }
1.329 + }
1.330 +
1.331 + return content;
1.332 +}
1.333 +
1.334 +nsINodeList*
1.335 +nsINode::ChildNodes()
1.336 +{
1.337 + nsSlots* slots = Slots();
1.338 + if (!slots->mChildNodes) {
1.339 + slots->mChildNodes = new nsChildContentList(this);
1.340 + if (slots->mChildNodes) {
1.341 + NS_ADDREF(slots->mChildNodes);
1.342 + }
1.343 + }
1.344 +
1.345 + return slots->mChildNodes;
1.346 +}
1.347 +
1.348 +void
1.349 +nsINode::GetTextContentInternal(nsAString& aTextContent)
1.350 +{
1.351 + SetDOMStringToNull(aTextContent);
1.352 +}
1.353 +
1.354 +#ifdef DEBUG
1.355 +void
1.356 +nsINode::CheckNotNativeAnonymous() const
1.357 +{
1.358 + if (!IsNodeOfType(eCONTENT))
1.359 + return;
1.360 + nsIContent* content = static_cast<const nsIContent *>(this)->GetBindingParent();
1.361 + while (content) {
1.362 + if (content->IsRootOfNativeAnonymousSubtree()) {
1.363 + NS_ERROR("Element not marked to be in native anonymous subtree!");
1.364 + break;
1.365 + }
1.366 + content = content->GetBindingParent();
1.367 + }
1.368 +}
1.369 +#endif
1.370 +
1.371 +bool
1.372 +nsINode::IsInAnonymousSubtree() const
1.373 +{
1.374 + if (!IsContent()) {
1.375 + return false;
1.376 + }
1.377 +
1.378 + return AsContent()->IsInAnonymousSubtree();
1.379 +}
1.380 +
1.381 +bool
1.382 +nsINode::IsAnonymousContentInSVGUseSubtree() const
1.383 +{
1.384 + MOZ_ASSERT(IsInAnonymousSubtree());
1.385 + nsIContent* parent = AsContent()->GetBindingParent();
1.386 + // Watch out for parentless native-anonymous subtrees.
1.387 + return parent && parent->IsSVG(nsGkAtoms::use);
1.388 +}
1.389 +
1.390 +nsresult
1.391 +nsINode::GetParentNode(nsIDOMNode** aParentNode)
1.392 +{
1.393 + *aParentNode = nullptr;
1.394 +
1.395 + nsINode *parent = GetParentNode();
1.396 +
1.397 + return parent ? CallQueryInterface(parent, aParentNode) : NS_OK;
1.398 +}
1.399 +
1.400 +nsresult
1.401 +nsINode::GetParentElement(nsIDOMElement** aParentElement)
1.402 +{
1.403 + *aParentElement = nullptr;
1.404 + nsINode* parent = GetParentElement();
1.405 + return parent ? CallQueryInterface(parent, aParentElement) : NS_OK;
1.406 +}
1.407 +
1.408 +nsresult
1.409 +nsINode::GetChildNodes(nsIDOMNodeList** aChildNodes)
1.410 +{
1.411 + NS_ADDREF(*aChildNodes = ChildNodes());
1.412 +
1.413 + return NS_OK;
1.414 +}
1.415 +
1.416 +nsresult
1.417 +nsINode::GetFirstChild(nsIDOMNode** aNode)
1.418 +{
1.419 + nsIContent* child = GetFirstChild();
1.420 + if (child) {
1.421 + return CallQueryInterface(child, aNode);
1.422 + }
1.423 +
1.424 + *aNode = nullptr;
1.425 +
1.426 + return NS_OK;
1.427 +}
1.428 +
1.429 +nsresult
1.430 +nsINode::GetLastChild(nsIDOMNode** aNode)
1.431 +{
1.432 + nsIContent* child = GetLastChild();
1.433 + if (child) {
1.434 + return CallQueryInterface(child, aNode);
1.435 + }
1.436 +
1.437 + *aNode = nullptr;
1.438 +
1.439 + return NS_OK;
1.440 +}
1.441 +
1.442 +nsresult
1.443 +nsINode::GetPreviousSibling(nsIDOMNode** aPrevSibling)
1.444 +{
1.445 + *aPrevSibling = nullptr;
1.446 +
1.447 + nsIContent *sibling = GetPreviousSibling();
1.448 +
1.449 + return sibling ? CallQueryInterface(sibling, aPrevSibling) : NS_OK;
1.450 +}
1.451 +
1.452 +nsresult
1.453 +nsINode::GetNextSibling(nsIDOMNode** aNextSibling)
1.454 +{
1.455 + *aNextSibling = nullptr;
1.456 +
1.457 + nsIContent *sibling = GetNextSibling();
1.458 +
1.459 + return sibling ? CallQueryInterface(sibling, aNextSibling) : NS_OK;
1.460 +}
1.461 +
1.462 +nsresult
1.463 +nsINode::GetOwnerDocument(nsIDOMDocument** aOwnerDocument)
1.464 +{
1.465 + *aOwnerDocument = nullptr;
1.466 +
1.467 + nsIDocument *ownerDoc = GetOwnerDocument();
1.468 +
1.469 + return ownerDoc ? CallQueryInterface(ownerDoc, aOwnerDocument) : NS_OK;
1.470 +}
1.471 +
1.472 +void
1.473 +nsINode::GetNodeValueInternal(nsAString& aNodeValue)
1.474 +{
1.475 + SetDOMStringToNull(aNodeValue);
1.476 +}
1.477 +
1.478 +nsINode*
1.479 +nsINode::RemoveChild(nsINode& aOldChild, ErrorResult& aError)
1.480 +{
1.481 + if (IsNodeOfType(eDATA_NODE)) {
1.482 + // aOldChild can't be one of our children.
1.483 + aError.Throw(NS_ERROR_DOM_NOT_FOUND_ERR);
1.484 + return nullptr;
1.485 + }
1.486 +
1.487 + if (aOldChild.GetParentNode() == this) {
1.488 + nsContentUtils::MaybeFireNodeRemoved(&aOldChild, this, OwnerDoc());
1.489 + }
1.490 +
1.491 + int32_t index = IndexOf(&aOldChild);
1.492 + if (index == -1) {
1.493 + // aOldChild isn't one of our children.
1.494 + aError.Throw(NS_ERROR_DOM_NOT_FOUND_ERR);
1.495 + return nullptr;
1.496 + }
1.497 +
1.498 + RemoveChildAt(index, true);
1.499 + return &aOldChild;
1.500 +}
1.501 +
1.502 +nsresult
1.503 +nsINode::RemoveChild(nsIDOMNode* aOldChild, nsIDOMNode** aReturn)
1.504 +{
1.505 + nsCOMPtr<nsINode> oldChild = do_QueryInterface(aOldChild);
1.506 + if (!oldChild) {
1.507 + return NS_ERROR_NULL_POINTER;
1.508 + }
1.509 +
1.510 + ErrorResult rv;
1.511 + RemoveChild(*oldChild, rv);
1.512 + if (!rv.Failed()) {
1.513 + NS_ADDREF(*aReturn = aOldChild);
1.514 + }
1.515 + return rv.ErrorCode();
1.516 +}
1.517 +
1.518 +void
1.519 +nsINode::Normalize()
1.520 +{
1.521 + // First collect list of nodes to be removed
1.522 + nsAutoTArray<nsCOMPtr<nsIContent>, 50> nodes;
1.523 +
1.524 + bool canMerge = false;
1.525 + for (nsIContent* node = this->GetFirstChild();
1.526 + node;
1.527 + node = node->GetNextNode(this)) {
1.528 + if (node->NodeType() != nsIDOMNode::TEXT_NODE) {
1.529 + canMerge = false;
1.530 + continue;
1.531 + }
1.532 +
1.533 + if (canMerge || node->TextLength() == 0) {
1.534 + // No need to touch canMerge. That way we can merge across empty
1.535 + // textnodes if and only if the node before is a textnode
1.536 + nodes.AppendElement(node);
1.537 + }
1.538 + else {
1.539 + canMerge = true;
1.540 + }
1.541 +
1.542 + // If there's no following sibling, then we need to ensure that we don't
1.543 + // collect following siblings of our (grand)parent as to-be-removed
1.544 + canMerge = canMerge && !!node->GetNextSibling();
1.545 + }
1.546 +
1.547 + if (nodes.IsEmpty()) {
1.548 + return;
1.549 + }
1.550 +
1.551 + // We're relying on mozAutoSubtreeModified to keep the doc alive here.
1.552 + nsIDocument* doc = OwnerDoc();
1.553 +
1.554 + // Batch possible DOMSubtreeModified events.
1.555 + mozAutoSubtreeModified subtree(doc, nullptr);
1.556 +
1.557 + // Fire all DOMNodeRemoved events. Optimize the common case of there being
1.558 + // no listeners
1.559 + bool hasRemoveListeners = nsContentUtils::
1.560 + HasMutationListeners(doc, NS_EVENT_BITS_MUTATION_NODEREMOVED);
1.561 + if (hasRemoveListeners) {
1.562 + for (uint32_t i = 0; i < nodes.Length(); ++i) {
1.563 + nsINode* parentNode = nodes[i]->GetParentNode();
1.564 + if (parentNode) { // Node may have already been removed.
1.565 + nsContentUtils::MaybeFireNodeRemoved(nodes[i], parentNode,
1.566 + doc);
1.567 + }
1.568 + }
1.569 + }
1.570 +
1.571 + mozAutoDocUpdate batch(doc, UPDATE_CONTENT_MODEL, true);
1.572 +
1.573 + // Merge and remove all nodes
1.574 + nsAutoString tmpStr;
1.575 + for (uint32_t i = 0; i < nodes.Length(); ++i) {
1.576 + nsIContent* node = nodes[i];
1.577 + // Merge with previous node unless empty
1.578 + const nsTextFragment* text = node->GetText();
1.579 + if (text->GetLength()) {
1.580 + nsIContent* target = node->GetPreviousSibling();
1.581 + NS_ASSERTION((target && target->NodeType() == nsIDOMNode::TEXT_NODE) ||
1.582 + hasRemoveListeners,
1.583 + "Should always have a previous text sibling unless "
1.584 + "mutation events messed us up");
1.585 + if (!hasRemoveListeners ||
1.586 + (target && target->NodeType() == nsIDOMNode::TEXT_NODE)) {
1.587 + nsTextNode* t = static_cast<nsTextNode*>(target);
1.588 + if (text->Is2b()) {
1.589 + t->AppendTextForNormalize(text->Get2b(), text->GetLength(), true, node);
1.590 + }
1.591 + else {
1.592 + tmpStr.Truncate();
1.593 + text->AppendTo(tmpStr);
1.594 + t->AppendTextForNormalize(tmpStr.get(), tmpStr.Length(), true, node);
1.595 + }
1.596 + }
1.597 + }
1.598 +
1.599 + // Remove node
1.600 + nsCOMPtr<nsINode> parent = node->GetParentNode();
1.601 + NS_ASSERTION(parent || hasRemoveListeners,
1.602 + "Should always have a parent unless "
1.603 + "mutation events messed us up");
1.604 + if (parent) {
1.605 + parent->RemoveChildAt(parent->IndexOf(node), true);
1.606 + }
1.607 + }
1.608 +}
1.609 +
1.610 +void
1.611 +nsINode::GetBaseURI(nsAString &aURI) const
1.612 +{
1.613 + nsCOMPtr<nsIURI> baseURI = GetBaseURI();
1.614 +
1.615 + nsAutoCString spec;
1.616 + if (baseURI) {
1.617 + baseURI->GetSpec(spec);
1.618 + }
1.619 +
1.620 + CopyUTF8toUTF16(spec, aURI);
1.621 +}
1.622 +
1.623 +void
1.624 +nsINode::GetBaseURIFromJS(nsAString& aURI) const
1.625 +{
1.626 + nsCOMPtr<nsIURI> baseURI = GetBaseURI(nsContentUtils::IsCallerChrome());
1.627 + nsAutoCString spec;
1.628 + if (baseURI) {
1.629 + baseURI->GetSpec(spec);
1.630 + }
1.631 + CopyUTF8toUTF16(spec, aURI);
1.632 +}
1.633 +
1.634 +already_AddRefed<nsIURI>
1.635 +nsINode::GetBaseURIObject() const
1.636 +{
1.637 + return GetBaseURI(true);
1.638 +}
1.639 +
1.640 +void
1.641 +nsINode::LookupPrefix(const nsAString& aNamespaceURI, nsAString& aPrefix)
1.642 +{
1.643 + Element *element = GetNameSpaceElement();
1.644 + if (element) {
1.645 + // XXX Waiting for DOM spec to list error codes.
1.646 +
1.647 + // Trace up the content parent chain looking for the namespace
1.648 + // declaration that defines the aNamespaceURI namespace. Once found,
1.649 + // return the prefix (i.e. the attribute localName).
1.650 + for (nsIContent* content = element; content;
1.651 + content = content->GetParent()) {
1.652 + uint32_t attrCount = content->GetAttrCount();
1.653 +
1.654 + for (uint32_t i = 0; i < attrCount; ++i) {
1.655 + const nsAttrName* name = content->GetAttrNameAt(i);
1.656 +
1.657 + if (name->NamespaceEquals(kNameSpaceID_XMLNS) &&
1.658 + content->AttrValueIs(kNameSpaceID_XMLNS, name->LocalName(),
1.659 + aNamespaceURI, eCaseMatters)) {
1.660 + // If the localName is "xmlns", the prefix we output should be
1.661 + // null.
1.662 + nsIAtom *localName = name->LocalName();
1.663 +
1.664 + if (localName != nsGkAtoms::xmlns) {
1.665 + localName->ToString(aPrefix);
1.666 + }
1.667 + else {
1.668 + SetDOMStringToNull(aPrefix);
1.669 + }
1.670 + return;
1.671 + }
1.672 + }
1.673 + }
1.674 + }
1.675 +
1.676 + SetDOMStringToNull(aPrefix);
1.677 +}
1.678 +
1.679 +static nsresult
1.680 +SetUserDataProperty(uint16_t aCategory, nsINode *aNode, nsIAtom *aKey,
1.681 + nsISupports* aValue, void** aOldValue)
1.682 +{
1.683 + nsresult rv = aNode->SetProperty(aCategory, aKey, aValue,
1.684 + nsPropertyTable::SupportsDtorFunc, true,
1.685 + aOldValue);
1.686 + NS_ENSURE_SUCCESS(rv, rv);
1.687 +
1.688 + // Property table owns it now.
1.689 + NS_ADDREF(aValue);
1.690 +
1.691 + return NS_OK;
1.692 +}
1.693 +
1.694 +nsresult
1.695 +nsINode::SetUserData(const nsAString &aKey, nsIVariant *aData,
1.696 + nsIDOMUserDataHandler *aHandler, nsIVariant **aResult)
1.697 +{
1.698 + OwnerDoc()->WarnOnceAbout(nsIDocument::eGetSetUserData);
1.699 + *aResult = nullptr;
1.700 +
1.701 + nsCOMPtr<nsIAtom> key = do_GetAtom(aKey);
1.702 + if (!key) {
1.703 + return NS_ERROR_OUT_OF_MEMORY;
1.704 + }
1.705 +
1.706 + nsresult rv;
1.707 + void *data;
1.708 + if (aData) {
1.709 + rv = SetUserDataProperty(DOM_USER_DATA, this, key, aData, &data);
1.710 + NS_ENSURE_SUCCESS(rv, rv);
1.711 + }
1.712 + else {
1.713 + data = UnsetProperty(DOM_USER_DATA, key);
1.714 + }
1.715 +
1.716 + // Take over ownership of the old data from the property table.
1.717 + nsCOMPtr<nsIVariant> oldData = dont_AddRef(static_cast<nsIVariant*>(data));
1.718 +
1.719 + if (aData && aHandler) {
1.720 + nsCOMPtr<nsIDOMUserDataHandler> oldHandler;
1.721 + rv = SetUserDataProperty(DOM_USER_DATA_HANDLER, this, key, aHandler,
1.722 + getter_AddRefs(oldHandler));
1.723 + if (NS_FAILED(rv)) {
1.724 + // We failed to set the handler, remove the data.
1.725 + DeleteProperty(DOM_USER_DATA, key);
1.726 +
1.727 + return rv;
1.728 + }
1.729 + }
1.730 + else {
1.731 + DeleteProperty(DOM_USER_DATA_HANDLER, key);
1.732 + }
1.733 +
1.734 + oldData.swap(*aResult);
1.735 +
1.736 + return NS_OK;
1.737 +}
1.738 +
1.739 +void
1.740 +nsINode::SetUserData(JSContext* aCx, const nsAString& aKey,
1.741 + JS::Handle<JS::Value> aData,
1.742 + nsIDOMUserDataHandler* aHandler,
1.743 + JS::MutableHandle<JS::Value> aRetval,
1.744 + ErrorResult& aError)
1.745 +{
1.746 + nsCOMPtr<nsIVariant> data;
1.747 + aError = nsContentUtils::XPConnect()->JSValToVariant(aCx, aData, getter_AddRefs(data));
1.748 + if (aError.Failed()) {
1.749 + return;
1.750 + }
1.751 +
1.752 + nsCOMPtr<nsIVariant> oldData;
1.753 + aError = SetUserData(aKey, data, aHandler, getter_AddRefs(oldData));
1.754 + if (aError.Failed()) {
1.755 + return;
1.756 + }
1.757 +
1.758 + if (!oldData) {
1.759 + aRetval.setNull();
1.760 + return;
1.761 + }
1.762 +
1.763 + JSAutoCompartment ac(aCx, GetWrapper());
1.764 + aError = nsContentUtils::XPConnect()->VariantToJS(aCx, GetWrapper(), oldData,
1.765 + aRetval);
1.766 +}
1.767 +
1.768 +nsIVariant*
1.769 +nsINode::GetUserData(const nsAString& aKey)
1.770 +{
1.771 + OwnerDoc()->WarnOnceAbout(nsIDocument::eGetSetUserData);
1.772 + nsCOMPtr<nsIAtom> key = do_GetAtom(aKey);
1.773 + if (!key) {
1.774 + return nullptr;
1.775 + }
1.776 +
1.777 + return static_cast<nsIVariant*>(GetProperty(DOM_USER_DATA, key));
1.778 +}
1.779 +
1.780 +void
1.781 +nsINode::GetUserData(JSContext* aCx, const nsAString& aKey,
1.782 + JS::MutableHandle<JS::Value> aRetval, ErrorResult& aError)
1.783 +{
1.784 + nsIVariant* data = GetUserData(aKey);
1.785 + if (!data) {
1.786 + aRetval.setNull();
1.787 + return;
1.788 + }
1.789 +
1.790 + JSAutoCompartment ac(aCx, GetWrapper());
1.791 + aError = nsContentUtils::XPConnect()->VariantToJS(aCx, GetWrapper(), data,
1.792 + aRetval);
1.793 +}
1.794 +
1.795 +uint16_t
1.796 +nsINode::CompareDocumentPosition(nsINode& aOtherNode) const
1.797 +{
1.798 + if (this == &aOtherNode) {
1.799 + return 0;
1.800 + }
1.801 + if (GetPreviousSibling() == &aOtherNode) {
1.802 + MOZ_ASSERT(GetParentNode() == aOtherNode.GetParentNode());
1.803 + return static_cast<uint16_t>(nsIDOMNode::DOCUMENT_POSITION_PRECEDING);
1.804 + }
1.805 + if (GetNextSibling() == &aOtherNode) {
1.806 + MOZ_ASSERT(GetParentNode() == aOtherNode.GetParentNode());
1.807 + return static_cast<uint16_t>(nsIDOMNode::DOCUMENT_POSITION_FOLLOWING);
1.808 + }
1.809 +
1.810 + nsAutoTArray<const nsINode*, 32> parents1, parents2;
1.811 +
1.812 + const nsINode *node1 = &aOtherNode, *node2 = this;
1.813 +
1.814 + // Check if either node is an attribute
1.815 + const Attr* attr1 = nullptr;
1.816 + if (node1->IsNodeOfType(nsINode::eATTRIBUTE)) {
1.817 + attr1 = static_cast<const Attr*>(node1);
1.818 + const Element* elem = attr1->GetElement();
1.819 + // If there is an owner element add the attribute
1.820 + // to the chain and walk up to the element
1.821 + if (elem) {
1.822 + node1 = elem;
1.823 + parents1.AppendElement(attr1);
1.824 + }
1.825 + }
1.826 + if (node2->IsNodeOfType(nsINode::eATTRIBUTE)) {
1.827 + const Attr* attr2 = static_cast<const Attr*>(node2);
1.828 + const Element* elem = attr2->GetElement();
1.829 + if (elem == node1 && attr1) {
1.830 + // Both nodes are attributes on the same element.
1.831 + // Compare position between the attributes.
1.832 +
1.833 + uint32_t i;
1.834 + const nsAttrName* attrName;
1.835 + for (i = 0; (attrName = elem->GetAttrNameAt(i)); ++i) {
1.836 + if (attrName->Equals(attr1->NodeInfo())) {
1.837 + NS_ASSERTION(!attrName->Equals(attr2->NodeInfo()),
1.838 + "Different attrs at same position");
1.839 + return nsIDOMNode::DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC |
1.840 + nsIDOMNode::DOCUMENT_POSITION_PRECEDING;
1.841 + }
1.842 + if (attrName->Equals(attr2->NodeInfo())) {
1.843 + return nsIDOMNode::DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC |
1.844 + nsIDOMNode::DOCUMENT_POSITION_FOLLOWING;
1.845 + }
1.846 + }
1.847 + NS_NOTREACHED("neither attribute in the element");
1.848 + return nsIDOMNode::DOCUMENT_POSITION_DISCONNECTED;
1.849 + }
1.850 +
1.851 + if (elem) {
1.852 + node2 = elem;
1.853 + parents2.AppendElement(attr2);
1.854 + }
1.855 + }
1.856 +
1.857 + // We now know that both nodes are either nsIContents or nsIDocuments.
1.858 + // If either node started out as an attribute, that attribute will have
1.859 + // the same relative position as its ownerElement, except if the
1.860 + // ownerElement ends up being the container for the other node
1.861 +
1.862 + // Build the chain of parents
1.863 + do {
1.864 + parents1.AppendElement(node1);
1.865 + node1 = node1->GetParentNode();
1.866 + } while (node1);
1.867 + do {
1.868 + parents2.AppendElement(node2);
1.869 + node2 = node2->GetParentNode();
1.870 + } while (node2);
1.871 +
1.872 + // Check if the nodes are disconnected.
1.873 + uint32_t pos1 = parents1.Length();
1.874 + uint32_t pos2 = parents2.Length();
1.875 + const nsINode* top1 = parents1.ElementAt(--pos1);
1.876 + const nsINode* top2 = parents2.ElementAt(--pos2);
1.877 + if (top1 != top2) {
1.878 + return top1 < top2 ?
1.879 + (nsIDOMNode::DOCUMENT_POSITION_PRECEDING |
1.880 + nsIDOMNode::DOCUMENT_POSITION_DISCONNECTED |
1.881 + nsIDOMNode::DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC) :
1.882 + (nsIDOMNode::DOCUMENT_POSITION_FOLLOWING |
1.883 + nsIDOMNode::DOCUMENT_POSITION_DISCONNECTED |
1.884 + nsIDOMNode::DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC);
1.885 + }
1.886 +
1.887 + // Find where the parent chain differs and check indices in the parent.
1.888 + const nsINode* parent = top1;
1.889 + uint32_t len;
1.890 + for (len = std::min(pos1, pos2); len > 0; --len) {
1.891 + const nsINode* child1 = parents1.ElementAt(--pos1);
1.892 + const nsINode* child2 = parents2.ElementAt(--pos2);
1.893 + if (child1 != child2) {
1.894 + // child1 or child2 can be an attribute here. This will work fine since
1.895 + // IndexOf will return -1 for the attribute making the attribute be
1.896 + // considered before any child.
1.897 + return parent->IndexOf(child1) < parent->IndexOf(child2) ?
1.898 + static_cast<uint16_t>(nsIDOMNode::DOCUMENT_POSITION_PRECEDING) :
1.899 + static_cast<uint16_t>(nsIDOMNode::DOCUMENT_POSITION_FOLLOWING);
1.900 + }
1.901 + parent = child1;
1.902 + }
1.903 +
1.904 + // We hit the end of one of the parent chains without finding a difference
1.905 + // between the chains. That must mean that one node is an ancestor of the
1.906 + // other. The one with the shortest chain must be the ancestor.
1.907 + return pos1 < pos2 ?
1.908 + (nsIDOMNode::DOCUMENT_POSITION_PRECEDING |
1.909 + nsIDOMNode::DOCUMENT_POSITION_CONTAINS) :
1.910 + (nsIDOMNode::DOCUMENT_POSITION_FOLLOWING |
1.911 + nsIDOMNode::DOCUMENT_POSITION_CONTAINED_BY);
1.912 +}
1.913 +
1.914 +bool
1.915 +nsINode::IsEqualNode(nsINode* aOther)
1.916 +{
1.917 + if (!aOther) {
1.918 + return false;
1.919 + }
1.920 +
1.921 + nsAutoString string1, string2;
1.922 +
1.923 + nsINode* node1 = this;
1.924 + nsINode* node2 = aOther;
1.925 + do {
1.926 + uint16_t nodeType = node1->NodeType();
1.927 + if (nodeType != node2->NodeType()) {
1.928 + return false;
1.929 + }
1.930 +
1.931 + nsINodeInfo* nodeInfo1 = node1->mNodeInfo;
1.932 + nsINodeInfo* nodeInfo2 = node2->mNodeInfo;
1.933 + if (!nodeInfo1->Equals(nodeInfo2) ||
1.934 + nodeInfo1->GetExtraName() != nodeInfo2->GetExtraName()) {
1.935 + return false;
1.936 + }
1.937 +
1.938 + switch(nodeType) {
1.939 + case nsIDOMNode::ELEMENT_NODE:
1.940 + {
1.941 + // Both are elements (we checked that their nodeinfos are equal). Do the
1.942 + // check on attributes.
1.943 + Element* element1 = node1->AsElement();
1.944 + Element* element2 = node2->AsElement();
1.945 + uint32_t attrCount = element1->GetAttrCount();
1.946 + if (attrCount != element2->GetAttrCount()) {
1.947 + return false;
1.948 + }
1.949 +
1.950 + // Iterate over attributes.
1.951 + for (uint32_t i = 0; i < attrCount; ++i) {
1.952 + const nsAttrName* attrName = element1->GetAttrNameAt(i);
1.953 +#ifdef DEBUG
1.954 + bool hasAttr =
1.955 +#endif
1.956 + element1->GetAttr(attrName->NamespaceID(), attrName->LocalName(),
1.957 + string1);
1.958 + NS_ASSERTION(hasAttr, "Why don't we have an attr?");
1.959 +
1.960 + if (!element2->AttrValueIs(attrName->NamespaceID(),
1.961 + attrName->LocalName(),
1.962 + string1,
1.963 + eCaseMatters)) {
1.964 + return false;
1.965 + }
1.966 + }
1.967 + break;
1.968 + }
1.969 + case nsIDOMNode::TEXT_NODE:
1.970 + case nsIDOMNode::COMMENT_NODE:
1.971 + case nsIDOMNode::CDATA_SECTION_NODE:
1.972 + case nsIDOMNode::PROCESSING_INSTRUCTION_NODE:
1.973 + {
1.974 + string1.Truncate();
1.975 + static_cast<nsIContent*>(node1)->AppendTextTo(string1);
1.976 + string2.Truncate();
1.977 + static_cast<nsIContent*>(node2)->AppendTextTo(string2);
1.978 +
1.979 + if (!string1.Equals(string2)) {
1.980 + return false;
1.981 + }
1.982 +
1.983 + break;
1.984 + }
1.985 + case nsIDOMNode::DOCUMENT_NODE:
1.986 + case nsIDOMNode::DOCUMENT_FRAGMENT_NODE:
1.987 + break;
1.988 + case nsIDOMNode::ATTRIBUTE_NODE:
1.989 + {
1.990 + NS_ASSERTION(node1 == this && node2 == aOther,
1.991 + "Did we come upon an attribute node while walking a "
1.992 + "subtree?");
1.993 + node1->GetNodeValue(string1);
1.994 + node2->GetNodeValue(string2);
1.995 +
1.996 + // Returning here as to not bother walking subtree. And there is no
1.997 + // risk that we're half way through walking some other subtree since
1.998 + // attribute nodes doesn't appear in subtrees.
1.999 + return string1.Equals(string2);
1.1000 + }
1.1001 + case nsIDOMNode::DOCUMENT_TYPE_NODE:
1.1002 + {
1.1003 + nsCOMPtr<nsIDOMDocumentType> docType1 = do_QueryInterface(node1);
1.1004 + nsCOMPtr<nsIDOMDocumentType> docType2 = do_QueryInterface(node2);
1.1005 +
1.1006 + NS_ASSERTION(docType1 && docType2, "Why don't we have a document type node?");
1.1007 +
1.1008 + // Public ID
1.1009 + docType1->GetPublicId(string1);
1.1010 + docType2->GetPublicId(string2);
1.1011 + if (!string1.Equals(string2)) {
1.1012 + return false;
1.1013 + }
1.1014 +
1.1015 + // System ID
1.1016 + docType1->GetSystemId(string1);
1.1017 + docType2->GetSystemId(string2);
1.1018 + if (!string1.Equals(string2)) {
1.1019 + return false;
1.1020 + }
1.1021 +
1.1022 + // Internal subset
1.1023 + docType1->GetInternalSubset(string1);
1.1024 + docType2->GetInternalSubset(string2);
1.1025 + if (!string1.Equals(string2)) {
1.1026 + return false;
1.1027 + }
1.1028 +
1.1029 + break;
1.1030 + }
1.1031 + default:
1.1032 + NS_ABORT_IF_FALSE(false, "Unknown node type");
1.1033 + }
1.1034 +
1.1035 + nsINode* nextNode = node1->GetFirstChild();
1.1036 + if (nextNode) {
1.1037 + node1 = nextNode;
1.1038 + node2 = node2->GetFirstChild();
1.1039 + }
1.1040 + else {
1.1041 + if (node2->GetFirstChild()) {
1.1042 + // node2 has a firstChild, but node1 doesn't
1.1043 + return false;
1.1044 + }
1.1045 +
1.1046 + // Find next sibling, possibly walking parent chain.
1.1047 + while (1) {
1.1048 + if (node1 == this) {
1.1049 + NS_ASSERTION(node2 == aOther, "Should have reached the start node "
1.1050 + "for both trees at the same time");
1.1051 + return true;
1.1052 + }
1.1053 +
1.1054 + nextNode = node1->GetNextSibling();
1.1055 + if (nextNode) {
1.1056 + node1 = nextNode;
1.1057 + node2 = node2->GetNextSibling();
1.1058 + break;
1.1059 + }
1.1060 +
1.1061 + if (node2->GetNextSibling()) {
1.1062 + // node2 has a nextSibling, but node1 doesn't
1.1063 + return false;
1.1064 + }
1.1065 +
1.1066 + node1 = node1->GetParentNode();
1.1067 + node2 = node2->GetParentNode();
1.1068 + NS_ASSERTION(node1 && node2, "no parent while walking subtree");
1.1069 + }
1.1070 + }
1.1071 + } while(node2);
1.1072 +
1.1073 + return false;
1.1074 +}
1.1075 +
1.1076 +void
1.1077 +nsINode::LookupNamespaceURI(const nsAString& aNamespacePrefix,
1.1078 + nsAString& aNamespaceURI)
1.1079 +{
1.1080 + Element *element = GetNameSpaceElement();
1.1081 + if (!element ||
1.1082 + NS_FAILED(element->LookupNamespaceURIInternal(aNamespacePrefix,
1.1083 + aNamespaceURI))) {
1.1084 + SetDOMStringToNull(aNamespaceURI);
1.1085 + }
1.1086 +}
1.1087 +
1.1088 +NS_IMPL_DOMTARGET_DEFAULTS(nsINode)
1.1089 +
1.1090 +NS_IMETHODIMP
1.1091 +nsINode::AddEventListener(const nsAString& aType,
1.1092 + nsIDOMEventListener *aListener,
1.1093 + bool aUseCapture,
1.1094 + bool aWantsUntrusted,
1.1095 + uint8_t aOptionalArgc)
1.1096 +{
1.1097 + NS_ASSERTION(!aWantsUntrusted || aOptionalArgc > 1,
1.1098 + "Won't check if this is chrome, you want to set "
1.1099 + "aWantsUntrusted to false or make the aWantsUntrusted "
1.1100 + "explicit by making aOptionalArgc non-zero.");
1.1101 +
1.1102 + if (!aWantsUntrusted &&
1.1103 + (aOptionalArgc < 2 &&
1.1104 + !nsContentUtils::IsChromeDoc(OwnerDoc()))) {
1.1105 + aWantsUntrusted = true;
1.1106 + }
1.1107 +
1.1108 + EventListenerManager* listener_manager = GetOrCreateListenerManager();
1.1109 + NS_ENSURE_STATE(listener_manager);
1.1110 + listener_manager->AddEventListener(aType, aListener, aUseCapture,
1.1111 + aWantsUntrusted);
1.1112 + return NS_OK;
1.1113 +}
1.1114 +
1.1115 +void
1.1116 +nsINode::AddEventListener(const nsAString& aType,
1.1117 + EventListener* aListener,
1.1118 + bool aUseCapture,
1.1119 + const Nullable<bool>& aWantsUntrusted,
1.1120 + ErrorResult& aRv)
1.1121 +{
1.1122 + bool wantsUntrusted;
1.1123 + if (aWantsUntrusted.IsNull()) {
1.1124 + wantsUntrusted = !nsContentUtils::IsChromeDoc(OwnerDoc());
1.1125 + } else {
1.1126 + wantsUntrusted = aWantsUntrusted.Value();
1.1127 + }
1.1128 +
1.1129 + EventListenerManager* listener_manager = GetOrCreateListenerManager();
1.1130 + if (!listener_manager) {
1.1131 + aRv.Throw(NS_ERROR_UNEXPECTED);
1.1132 + return;
1.1133 + }
1.1134 + listener_manager->AddEventListener(aType, aListener, aUseCapture,
1.1135 + wantsUntrusted);
1.1136 +}
1.1137 +
1.1138 +NS_IMETHODIMP
1.1139 +nsINode::AddSystemEventListener(const nsAString& aType,
1.1140 + nsIDOMEventListener *aListener,
1.1141 + bool aUseCapture,
1.1142 + bool aWantsUntrusted,
1.1143 + uint8_t aOptionalArgc)
1.1144 +{
1.1145 + NS_ASSERTION(!aWantsUntrusted || aOptionalArgc > 1,
1.1146 + "Won't check if this is chrome, you want to set "
1.1147 + "aWantsUntrusted to false or make the aWantsUntrusted "
1.1148 + "explicit by making aOptionalArgc non-zero.");
1.1149 +
1.1150 + if (!aWantsUntrusted &&
1.1151 + (aOptionalArgc < 2 &&
1.1152 + !nsContentUtils::IsChromeDoc(OwnerDoc()))) {
1.1153 + aWantsUntrusted = true;
1.1154 + }
1.1155 +
1.1156 + return NS_AddSystemEventListener(this, aType, aListener, aUseCapture,
1.1157 + aWantsUntrusted);
1.1158 +}
1.1159 +
1.1160 +NS_IMETHODIMP
1.1161 +nsINode::RemoveEventListener(const nsAString& aType,
1.1162 + nsIDOMEventListener* aListener,
1.1163 + bool aUseCapture)
1.1164 +{
1.1165 + EventListenerManager* elm = GetExistingListenerManager();
1.1166 + if (elm) {
1.1167 + elm->RemoveEventListener(aType, aListener, aUseCapture);
1.1168 + }
1.1169 + return NS_OK;
1.1170 +}
1.1171 +
1.1172 +NS_IMPL_REMOVE_SYSTEM_EVENT_LISTENER(nsINode)
1.1173 +
1.1174 +nsresult
1.1175 +nsINode::PreHandleEvent(EventChainPreVisitor& aVisitor)
1.1176 +{
1.1177 + // This is only here so that we can use the NS_DECL_NSIDOMTARGET macro
1.1178 + NS_ABORT();
1.1179 + return NS_ERROR_NOT_IMPLEMENTED;
1.1180 +}
1.1181 +
1.1182 +void
1.1183 +nsINode::GetBoxQuads(const BoxQuadOptions& aOptions,
1.1184 + nsTArray<nsRefPtr<DOMQuad> >& aResult,
1.1185 + mozilla::ErrorResult& aRv)
1.1186 +{
1.1187 + mozilla::GetBoxQuads(this, aOptions, aResult, aRv);
1.1188 +}
1.1189 +
1.1190 +already_AddRefed<DOMQuad>
1.1191 +nsINode::ConvertQuadFromNode(DOMQuad& aQuad,
1.1192 + const GeometryNode& aFrom,
1.1193 + const ConvertCoordinateOptions& aOptions,
1.1194 + ErrorResult& aRv)
1.1195 +{
1.1196 + return mozilla::ConvertQuadFromNode(this, aQuad, aFrom, aOptions, aRv);
1.1197 +}
1.1198 +
1.1199 +already_AddRefed<DOMQuad>
1.1200 +nsINode::ConvertRectFromNode(DOMRectReadOnly& aRect,
1.1201 + const GeometryNode& aFrom,
1.1202 + const ConvertCoordinateOptions& aOptions,
1.1203 + ErrorResult& aRv)
1.1204 +{
1.1205 + return mozilla::ConvertRectFromNode(this, aRect, aFrom, aOptions, aRv);
1.1206 +}
1.1207 +
1.1208 +already_AddRefed<DOMPoint>
1.1209 +nsINode::ConvertPointFromNode(const DOMPointInit& aPoint,
1.1210 + const GeometryNode& aFrom,
1.1211 + const ConvertCoordinateOptions& aOptions,
1.1212 + ErrorResult& aRv)
1.1213 +{
1.1214 + return mozilla::ConvertPointFromNode(this, aPoint, aFrom, aOptions, aRv);
1.1215 +}
1.1216 +
1.1217 +nsresult
1.1218 +nsINode::DispatchEvent(nsIDOMEvent *aEvent, bool* aRetVal)
1.1219 +{
1.1220 + // XXX sXBL/XBL2 issue -- do we really want the owner here? What
1.1221 + // if that's the XBL document? Would we want its presshell? Or what?
1.1222 + nsCOMPtr<nsIDocument> document = OwnerDoc();
1.1223 +
1.1224 + // Do nothing if the element does not belong to a document
1.1225 + if (!document) {
1.1226 + *aRetVal = true;
1.1227 + return NS_OK;
1.1228 + }
1.1229 +
1.1230 + // Obtain a presentation shell
1.1231 + nsIPresShell *shell = document->GetShell();
1.1232 + nsRefPtr<nsPresContext> context;
1.1233 + if (shell) {
1.1234 + context = shell->GetPresContext();
1.1235 + }
1.1236 +
1.1237 + nsEventStatus status = nsEventStatus_eIgnore;
1.1238 + nsresult rv =
1.1239 + EventDispatcher::DispatchDOMEvent(this, nullptr, aEvent, context, &status);
1.1240 + *aRetVal = (status != nsEventStatus_eConsumeNoDefault);
1.1241 + return rv;
1.1242 +}
1.1243 +
1.1244 +nsresult
1.1245 +nsINode::PostHandleEvent(EventChainPostVisitor& /*aVisitor*/)
1.1246 +{
1.1247 + return NS_OK;
1.1248 +}
1.1249 +
1.1250 +nsresult
1.1251 +nsINode::DispatchDOMEvent(WidgetEvent* aEvent,
1.1252 + nsIDOMEvent* aDOMEvent,
1.1253 + nsPresContext* aPresContext,
1.1254 + nsEventStatus* aEventStatus)
1.1255 +{
1.1256 + return EventDispatcher::DispatchDOMEvent(this, aEvent, aDOMEvent,
1.1257 + aPresContext, aEventStatus);
1.1258 +}
1.1259 +
1.1260 +EventListenerManager*
1.1261 +nsINode::GetOrCreateListenerManager()
1.1262 +{
1.1263 + return nsContentUtils::GetListenerManagerForNode(this);
1.1264 +}
1.1265 +
1.1266 +EventListenerManager*
1.1267 +nsINode::GetExistingListenerManager() const
1.1268 +{
1.1269 + return nsContentUtils::GetExistingListenerManagerForNode(this);
1.1270 +}
1.1271 +
1.1272 +nsIScriptContext*
1.1273 +nsINode::GetContextForEventHandlers(nsresult* aRv)
1.1274 +{
1.1275 + return nsContentUtils::GetContextForEventHandlers(this, aRv);
1.1276 +}
1.1277 +
1.1278 +nsIDOMWindow*
1.1279 +nsINode::GetOwnerGlobal()
1.1280 +{
1.1281 + bool dummy;
1.1282 + return nsPIDOMWindow::GetOuterFromCurrentInner(
1.1283 + static_cast<nsGlobalWindow*>(OwnerDoc()->GetScriptHandlingObject(dummy)));
1.1284 +}
1.1285 +
1.1286 +bool
1.1287 +nsINode::UnoptimizableCCNode() const
1.1288 +{
1.1289 + const uintptr_t problematicFlags = (NODE_IS_ANONYMOUS_ROOT |
1.1290 + NODE_IS_IN_NATIVE_ANONYMOUS_SUBTREE |
1.1291 + NODE_IS_NATIVE_ANONYMOUS_ROOT |
1.1292 + NODE_MAY_BE_IN_BINDING_MNGR |
1.1293 + NODE_IS_IN_SHADOW_TREE);
1.1294 + return HasFlag(problematicFlags) ||
1.1295 + NodeType() == nsIDOMNode::ATTRIBUTE_NODE ||
1.1296 + // For strange cases like xbl:content/xbl:children
1.1297 + (IsElement() &&
1.1298 + AsElement()->IsInNamespace(kNameSpaceID_XBL));
1.1299 +}
1.1300 +
1.1301 +/* static */
1.1302 +bool
1.1303 +nsINode::Traverse(nsINode *tmp, nsCycleCollectionTraversalCallback &cb)
1.1304 +{
1.1305 + if (MOZ_LIKELY(!cb.WantAllTraces())) {
1.1306 + nsIDocument *currentDoc = tmp->GetCurrentDoc();
1.1307 + if (currentDoc &&
1.1308 + nsCCUncollectableMarker::InGeneration(currentDoc->GetMarkedCCGeneration())) {
1.1309 + return false;
1.1310 + }
1.1311 +
1.1312 + if (nsCCUncollectableMarker::sGeneration) {
1.1313 + // If we're black no need to traverse.
1.1314 + if (tmp->IsBlack() || tmp->InCCBlackTree()) {
1.1315 + return false;
1.1316 + }
1.1317 +
1.1318 + if (!tmp->UnoptimizableCCNode()) {
1.1319 + // If we're in a black document, return early.
1.1320 + if ((currentDoc && currentDoc->IsBlack())) {
1.1321 + return false;
1.1322 + }
1.1323 + // If we're not in anonymous content and we have a black parent,
1.1324 + // return early.
1.1325 + nsIContent* parent = tmp->GetParent();
1.1326 + if (parent && !parent->UnoptimizableCCNode() && parent->IsBlack()) {
1.1327 + NS_ABORT_IF_FALSE(parent->IndexOf(tmp) >= 0, "Parent doesn't own us?");
1.1328 + return false;
1.1329 + }
1.1330 + }
1.1331 + }
1.1332 + }
1.1333 +
1.1334 + NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mNodeInfo)
1.1335 + NS_IMPL_CYCLE_COLLECTION_TRAVERSE_RAWPTR(GetParent())
1.1336 +
1.1337 + nsSlots *slots = tmp->GetExistingSlots();
1.1338 + if (slots) {
1.1339 + slots->Traverse(cb);
1.1340 + }
1.1341 +
1.1342 + if (tmp->HasProperties()) {
1.1343 + nsNodeUtils::TraverseUserData(tmp, cb);
1.1344 + nsCOMArray<nsISupports>* objects =
1.1345 + static_cast<nsCOMArray<nsISupports>*>(tmp->GetProperty(nsGkAtoms::keepobjectsalive));
1.1346 + if (objects) {
1.1347 + for (int32_t i = 0; i < objects->Count(); ++i) {
1.1348 + cb.NoteXPCOMChild(objects->ObjectAt(i));
1.1349 + }
1.1350 + }
1.1351 + }
1.1352 +
1.1353 + if (tmp->NodeType() != nsIDOMNode::DOCUMENT_NODE &&
1.1354 + tmp->HasFlag(NODE_HAS_LISTENERMANAGER)) {
1.1355 + nsContentUtils::TraverseListenerManager(tmp, cb);
1.1356 + }
1.1357 +
1.1358 + return true;
1.1359 +}
1.1360 +
1.1361 +/* static */
1.1362 +void
1.1363 +nsINode::Unlink(nsINode* tmp)
1.1364 +{
1.1365 + tmp->ReleaseWrapper(tmp);
1.1366 +
1.1367 + nsSlots *slots = tmp->GetExistingSlots();
1.1368 + if (slots) {
1.1369 + slots->Unlink();
1.1370 + }
1.1371 +
1.1372 + if (tmp->NodeType() != nsIDOMNode::DOCUMENT_NODE &&
1.1373 + tmp->HasFlag(NODE_HAS_LISTENERMANAGER)) {
1.1374 + nsContentUtils::RemoveListenerManager(tmp);
1.1375 + tmp->UnsetFlags(NODE_HAS_LISTENERMANAGER);
1.1376 + }
1.1377 +
1.1378 + if (tmp->HasProperties()) {
1.1379 + nsNodeUtils::UnlinkUserData(tmp);
1.1380 + tmp->DeleteProperty(nsGkAtoms::keepobjectsalive);
1.1381 + }
1.1382 +}
1.1383 +
1.1384 +static void
1.1385 +ReleaseURI(void*, /* aObject*/
1.1386 + nsIAtom*, /* aPropertyName */
1.1387 + void* aPropertyValue,
1.1388 + void* /* aData */)
1.1389 +{
1.1390 + nsIURI* uri = static_cast<nsIURI*>(aPropertyValue);
1.1391 + NS_RELEASE(uri);
1.1392 +}
1.1393 +
1.1394 +nsresult
1.1395 +nsINode::SetExplicitBaseURI(nsIURI* aURI)
1.1396 +{
1.1397 + nsresult rv = SetProperty(nsGkAtoms::baseURIProperty, aURI, ReleaseURI);
1.1398 + if (NS_SUCCEEDED(rv)) {
1.1399 + SetHasExplicitBaseURI();
1.1400 + NS_ADDREF(aURI);
1.1401 + }
1.1402 + return rv;
1.1403 +}
1.1404 +
1.1405 +static nsresult
1.1406 +AdoptNodeIntoOwnerDoc(nsINode *aParent, nsINode *aNode)
1.1407 +{
1.1408 + NS_ASSERTION(!aNode->GetParentNode(),
1.1409 + "Should have removed from parent already");
1.1410 +
1.1411 + nsIDocument *doc = aParent->OwnerDoc();
1.1412 +
1.1413 + nsresult rv;
1.1414 + nsCOMPtr<nsIDOMDocument> domDoc = do_QueryInterface(doc, &rv);
1.1415 + NS_ENSURE_SUCCESS(rv, rv);
1.1416 +
1.1417 + nsCOMPtr<nsIDOMNode> node = do_QueryInterface(aNode, &rv);
1.1418 + NS_ENSURE_SUCCESS(rv, rv);
1.1419 +
1.1420 + nsCOMPtr<nsIDOMNode> adoptedNode;
1.1421 + rv = domDoc->AdoptNode(node, getter_AddRefs(adoptedNode));
1.1422 + NS_ENSURE_SUCCESS(rv, rv);
1.1423 +
1.1424 + NS_ASSERTION(aParent->OwnerDoc() == doc,
1.1425 + "ownerDoc chainged while adopting");
1.1426 + NS_ASSERTION(adoptedNode == node, "Uh, adopt node changed nodes?");
1.1427 + NS_ASSERTION(aParent->OwnerDoc() == aNode->OwnerDoc(),
1.1428 + "ownerDocument changed again after adopting!");
1.1429 +
1.1430 + return NS_OK;
1.1431 +}
1.1432 +
1.1433 +static nsresult
1.1434 +CheckForOutdatedParent(nsINode* aParent, nsINode* aNode)
1.1435 +{
1.1436 + if (JSObject* existingObjUnrooted = aNode->GetWrapper()) {
1.1437 + AutoJSContext cx;
1.1438 + JS::Rooted<JSObject*> existingObj(cx, existingObjUnrooted);
1.1439 + nsIGlobalObject* global = aParent->OwnerDoc()->GetScopeObject();
1.1440 + MOZ_ASSERT(global);
1.1441 +
1.1442 + if (js::GetGlobalForObjectCrossCompartment(existingObj) !=
1.1443 + global->GetGlobalJSObject()) {
1.1444 + JSAutoCompartment ac(cx, existingObj);
1.1445 + nsresult rv = ReparentWrapper(cx, existingObj);
1.1446 + NS_ENSURE_SUCCESS(rv, rv);
1.1447 + }
1.1448 + }
1.1449 +
1.1450 + return NS_OK;
1.1451 +}
1.1452 +
1.1453 +nsresult
1.1454 +nsINode::doInsertChildAt(nsIContent* aKid, uint32_t aIndex,
1.1455 + bool aNotify, nsAttrAndChildArray& aChildArray)
1.1456 +{
1.1457 + NS_PRECONDITION(!aKid->GetParentNode(),
1.1458 + "Inserting node that already has parent");
1.1459 + nsresult rv;
1.1460 +
1.1461 + // The id-handling code, and in the future possibly other code, need to
1.1462 + // react to unexpected attribute changes.
1.1463 + nsMutationGuard::DidMutate();
1.1464 +
1.1465 + // Do this before checking the child-count since this could cause mutations
1.1466 + nsIDocument* doc = GetCurrentDoc();
1.1467 + mozAutoDocUpdate updateBatch(doc, UPDATE_CONTENT_MODEL, aNotify);
1.1468 +
1.1469 + if (OwnerDoc() != aKid->OwnerDoc()) {
1.1470 + rv = AdoptNodeIntoOwnerDoc(this, aKid);
1.1471 + NS_ENSURE_SUCCESS(rv, rv);
1.1472 + } else if (OwnerDoc()->DidDocumentOpen()) {
1.1473 + rv = CheckForOutdatedParent(this, aKid);
1.1474 + NS_ENSURE_SUCCESS(rv, rv);
1.1475 + }
1.1476 +
1.1477 + uint32_t childCount = aChildArray.ChildCount();
1.1478 + NS_ENSURE_TRUE(aIndex <= childCount, NS_ERROR_ILLEGAL_VALUE);
1.1479 + bool isAppend = (aIndex == childCount);
1.1480 +
1.1481 + rv = aChildArray.InsertChildAt(aKid, aIndex);
1.1482 + NS_ENSURE_SUCCESS(rv, rv);
1.1483 + if (aIndex == 0) {
1.1484 + mFirstChild = aKid;
1.1485 + }
1.1486 +
1.1487 + nsIContent* parent =
1.1488 + IsNodeOfType(eDOCUMENT) ? nullptr : static_cast<nsIContent*>(this);
1.1489 +
1.1490 + rv = aKid->BindToTree(doc, parent,
1.1491 + parent ? parent->GetBindingParent() : nullptr,
1.1492 + true);
1.1493 + if (NS_FAILED(rv)) {
1.1494 + if (GetFirstChild() == aKid) {
1.1495 + mFirstChild = aKid->GetNextSibling();
1.1496 + }
1.1497 + aChildArray.RemoveChildAt(aIndex);
1.1498 + aKid->UnbindFromTree();
1.1499 + return rv;
1.1500 + }
1.1501 +
1.1502 + NS_ASSERTION(aKid->GetParentNode() == this,
1.1503 + "Did we run script inappropriately?");
1.1504 +
1.1505 + if (aNotify) {
1.1506 + // Note that we always want to call ContentInserted when things are added
1.1507 + // as kids to documents
1.1508 + if (parent && isAppend) {
1.1509 + nsNodeUtils::ContentAppended(parent, aKid, aIndex);
1.1510 + } else {
1.1511 + nsNodeUtils::ContentInserted(this, aKid, aIndex);
1.1512 + }
1.1513 +
1.1514 + if (nsContentUtils::HasMutationListeners(aKid,
1.1515 + NS_EVENT_BITS_MUTATION_NODEINSERTED, this)) {
1.1516 + InternalMutationEvent mutation(true, NS_MUTATION_NODEINSERTED);
1.1517 + mutation.mRelatedNode = do_QueryInterface(this);
1.1518 +
1.1519 + mozAutoSubtreeModified subtree(OwnerDoc(), this);
1.1520 + (new AsyncEventDispatcher(aKid, mutation))->RunDOMEventWhenSafe();
1.1521 + }
1.1522 + }
1.1523 +
1.1524 + return NS_OK;
1.1525 +}
1.1526 +
1.1527 +Element*
1.1528 +nsINode::GetPreviousElementSibling() const
1.1529 +{
1.1530 + nsIContent* previousSibling = GetPreviousSibling();
1.1531 + while (previousSibling) {
1.1532 + if (previousSibling->IsElement()) {
1.1533 + return previousSibling->AsElement();
1.1534 + }
1.1535 + previousSibling = previousSibling->GetPreviousSibling();
1.1536 + }
1.1537 +
1.1538 + return nullptr;
1.1539 +}
1.1540 +
1.1541 +Element*
1.1542 +nsINode::GetNextElementSibling() const
1.1543 +{
1.1544 + nsIContent* nextSibling = GetNextSibling();
1.1545 + while (nextSibling) {
1.1546 + if (nextSibling->IsElement()) {
1.1547 + return nextSibling->AsElement();
1.1548 + }
1.1549 + nextSibling = nextSibling->GetNextSibling();
1.1550 + }
1.1551 +
1.1552 + return nullptr;
1.1553 +}
1.1554 +
1.1555 +void
1.1556 +nsINode::Remove()
1.1557 +{
1.1558 + nsCOMPtr<nsINode> parent = GetParentNode();
1.1559 + if (!parent) {
1.1560 + return;
1.1561 + }
1.1562 + int32_t index = parent->IndexOf(this);
1.1563 + if (index < 0) {
1.1564 + NS_WARNING("Ignoring call to nsINode::Remove on anonymous child.");
1.1565 + return;
1.1566 + }
1.1567 + parent->RemoveChildAt(uint32_t(index), true);
1.1568 +}
1.1569 +
1.1570 +Element*
1.1571 +nsINode::GetFirstElementChild() const
1.1572 +{
1.1573 + for (nsIContent* child = GetFirstChild();
1.1574 + child;
1.1575 + child = child->GetNextSibling()) {
1.1576 + if (child->IsElement()) {
1.1577 + return child->AsElement();
1.1578 + }
1.1579 + }
1.1580 +
1.1581 + return nullptr;
1.1582 +}
1.1583 +
1.1584 +Element*
1.1585 +nsINode::GetLastElementChild() const
1.1586 +{
1.1587 + for (nsIContent* child = GetLastChild();
1.1588 + child;
1.1589 + child = child->GetPreviousSibling()) {
1.1590 + if (child->IsElement()) {
1.1591 + return child->AsElement();
1.1592 + }
1.1593 + }
1.1594 +
1.1595 + return nullptr;
1.1596 +}
1.1597 +
1.1598 +void
1.1599 +nsINode::doRemoveChildAt(uint32_t aIndex, bool aNotify,
1.1600 + nsIContent* aKid, nsAttrAndChildArray& aChildArray)
1.1601 +{
1.1602 + NS_PRECONDITION(aKid && aKid->GetParentNode() == this &&
1.1603 + aKid == GetChildAt(aIndex) &&
1.1604 + IndexOf(aKid) == (int32_t)aIndex, "Bogus aKid");
1.1605 +
1.1606 + nsMutationGuard::DidMutate();
1.1607 +
1.1608 + nsIDocument* doc = GetCurrentDoc();
1.1609 +
1.1610 + mozAutoDocUpdate updateBatch(doc, UPDATE_CONTENT_MODEL, aNotify);
1.1611 +
1.1612 + nsIContent* previousSibling = aKid->GetPreviousSibling();
1.1613 +
1.1614 + if (GetFirstChild() == aKid) {
1.1615 + mFirstChild = aKid->GetNextSibling();
1.1616 + }
1.1617 +
1.1618 + aChildArray.RemoveChildAt(aIndex);
1.1619 +
1.1620 + if (aNotify) {
1.1621 + nsNodeUtils::ContentRemoved(this, aKid, aIndex, previousSibling);
1.1622 + }
1.1623 +
1.1624 + aKid->UnbindFromTree();
1.1625 +}
1.1626 +
1.1627 +// When replacing, aRefChild is the content being replaced; when
1.1628 +// inserting it's the content before which we're inserting. In the
1.1629 +// latter case it may be null.
1.1630 +static
1.1631 +bool IsAllowedAsChild(nsIContent* aNewChild, nsINode* aParent,
1.1632 + bool aIsReplace, nsINode* aRefChild)
1.1633 +{
1.1634 + MOZ_ASSERT(aNewChild, "Must have new child");
1.1635 + MOZ_ASSERT_IF(aIsReplace, aRefChild);
1.1636 + MOZ_ASSERT(aParent);
1.1637 + MOZ_ASSERT(aParent->IsNodeOfType(nsINode::eDOCUMENT) ||
1.1638 + aParent->IsNodeOfType(nsINode::eDOCUMENT_FRAGMENT) ||
1.1639 + aParent->IsElement(),
1.1640 + "Nodes that are not documents, document fragments or elements "
1.1641 + "can't be parents!");
1.1642 +
1.1643 + // A common case is that aNewChild has no kids, in which case
1.1644 + // aParent can't be a descendant of aNewChild unless they're
1.1645 + // actually equal to each other. Fast-path that case, since aParent
1.1646 + // could be pretty deep in the DOM tree.
1.1647 + if (aNewChild == aParent ||
1.1648 + ((aNewChild->GetFirstChild() ||
1.1649 + // HTML template elements and ShadowRoot hosts need
1.1650 + // to be checked to ensure that they are not inserted into
1.1651 + // the hosted content.
1.1652 + aNewChild->Tag() == nsGkAtoms::_template ||
1.1653 + aNewChild->GetShadowRoot()) &&
1.1654 + nsContentUtils::ContentIsHostIncludingDescendantOf(aParent,
1.1655 + aNewChild))) {
1.1656 + return false;
1.1657 + }
1.1658 +
1.1659 + // The allowed child nodes differ for documents and elements
1.1660 + switch (aNewChild->NodeType()) {
1.1661 + case nsIDOMNode::COMMENT_NODE :
1.1662 + case nsIDOMNode::PROCESSING_INSTRUCTION_NODE :
1.1663 + // OK in both cases
1.1664 + return true;
1.1665 + case nsIDOMNode::TEXT_NODE :
1.1666 + case nsIDOMNode::CDATA_SECTION_NODE :
1.1667 + case nsIDOMNode::ENTITY_REFERENCE_NODE :
1.1668 + // Allowed under Elements and DocumentFragments
1.1669 + return aParent->NodeType() != nsIDOMNode::DOCUMENT_NODE;
1.1670 + case nsIDOMNode::ELEMENT_NODE :
1.1671 + {
1.1672 + if (!aParent->IsNodeOfType(nsINode::eDOCUMENT)) {
1.1673 + // Always ok to have elements under other elements or document fragments
1.1674 + return true;
1.1675 + }
1.1676 +
1.1677 + nsIDocument* parentDocument = static_cast<nsIDocument*>(aParent);
1.1678 + Element* rootElement = parentDocument->GetRootElement();
1.1679 + if (rootElement) {
1.1680 + // Already have a documentElement, so this is only OK if we're
1.1681 + // replacing it.
1.1682 + return aIsReplace && rootElement == aRefChild;
1.1683 + }
1.1684 +
1.1685 + // We don't have a documentElement yet. Our one remaining constraint is
1.1686 + // that the documentElement must come after the doctype.
1.1687 + if (!aRefChild) {
1.1688 + // Appending is just fine.
1.1689 + return true;
1.1690 + }
1.1691 +
1.1692 + nsIContent* docTypeContent = parentDocument->GetDoctype();
1.1693 + if (!docTypeContent) {
1.1694 + // It's all good.
1.1695 + return true;
1.1696 + }
1.1697 +
1.1698 + int32_t doctypeIndex = aParent->IndexOf(docTypeContent);
1.1699 + int32_t insertIndex = aParent->IndexOf(aRefChild);
1.1700 +
1.1701 + // Now we're OK in the following two cases only:
1.1702 + // 1) We're replacing something that's not before the doctype
1.1703 + // 2) We're inserting before something that comes after the doctype
1.1704 + return aIsReplace ? (insertIndex >= doctypeIndex) :
1.1705 + insertIndex > doctypeIndex;
1.1706 + }
1.1707 + case nsIDOMNode::DOCUMENT_TYPE_NODE :
1.1708 + {
1.1709 + if (!aParent->IsNodeOfType(nsINode::eDOCUMENT)) {
1.1710 + // doctypes only allowed under documents
1.1711 + return false;
1.1712 + }
1.1713 +
1.1714 + nsIDocument* parentDocument = static_cast<nsIDocument*>(aParent);
1.1715 + nsIContent* docTypeContent = parentDocument->GetDoctype();
1.1716 + if (docTypeContent) {
1.1717 + // Already have a doctype, so this is only OK if we're replacing it
1.1718 + return aIsReplace && docTypeContent == aRefChild;
1.1719 + }
1.1720 +
1.1721 + // We don't have a doctype yet. Our one remaining constraint is
1.1722 + // that the doctype must come before the documentElement.
1.1723 + Element* rootElement = parentDocument->GetRootElement();
1.1724 + if (!rootElement) {
1.1725 + // It's all good
1.1726 + return true;
1.1727 + }
1.1728 +
1.1729 + if (!aRefChild) {
1.1730 + // Trying to append a doctype, but have a documentElement
1.1731 + return false;
1.1732 + }
1.1733 +
1.1734 + int32_t rootIndex = aParent->IndexOf(rootElement);
1.1735 + int32_t insertIndex = aParent->IndexOf(aRefChild);
1.1736 +
1.1737 + // Now we're OK if and only if insertIndex <= rootIndex. Indeed, either
1.1738 + // we end up replacing aRefChild or we end up before it. Either one is
1.1739 + // ok as long as aRefChild is not after rootElement.
1.1740 + return insertIndex <= rootIndex;
1.1741 + }
1.1742 + case nsIDOMNode::DOCUMENT_FRAGMENT_NODE :
1.1743 + {
1.1744 + // Note that for now we only allow nodes inside document fragments if
1.1745 + // they're allowed inside elements. If we ever change this to allow
1.1746 + // doctype nodes in document fragments, we'll need to update this code.
1.1747 + // Also, there's a version of this code in ReplaceOrInsertBefore. If you
1.1748 + // change this code, change that too.
1.1749 + if (!aParent->IsNodeOfType(nsINode::eDOCUMENT)) {
1.1750 + // All good here
1.1751 + return true;
1.1752 + }
1.1753 +
1.1754 + bool sawElement = false;
1.1755 + for (nsIContent* child = aNewChild->GetFirstChild();
1.1756 + child;
1.1757 + child = child->GetNextSibling()) {
1.1758 + if (child->IsElement()) {
1.1759 + if (sawElement) {
1.1760 + // Can't put two elements into a document
1.1761 + return false;
1.1762 + }
1.1763 + sawElement = true;
1.1764 + }
1.1765 + // If we can put this content at the the right place, we might be ok;
1.1766 + // if not, we bail out.
1.1767 + if (!IsAllowedAsChild(child, aParent, aIsReplace, aRefChild)) {
1.1768 + return false;
1.1769 + }
1.1770 + }
1.1771 +
1.1772 + // Everything in the fragment checked out ok, so we can stick it in here
1.1773 + return true;
1.1774 + }
1.1775 + default:
1.1776 + /*
1.1777 + * aNewChild is of invalid type.
1.1778 + */
1.1779 + break;
1.1780 + }
1.1781 +
1.1782 + return false;
1.1783 +}
1.1784 +
1.1785 +nsINode*
1.1786 +nsINode::ReplaceOrInsertBefore(bool aReplace, nsINode* aNewChild,
1.1787 + nsINode* aRefChild, ErrorResult& aError)
1.1788 +{
1.1789 + // XXXbz I wish I could assert that nsContentUtils::IsSafeToRunScript() so we
1.1790 + // could rely on scriptblockers going out of scope to actually run XBL
1.1791 + // teardown, but various crud adds nodes under scriptblockers (e.g. native
1.1792 + // anonymous content). The only good news is those insertions can't trigger
1.1793 + // the bad XBL cases.
1.1794 + MOZ_ASSERT_IF(aReplace, aRefChild);
1.1795 +
1.1796 + if ((!IsNodeOfType(eDOCUMENT) &&
1.1797 + !IsNodeOfType(eDOCUMENT_FRAGMENT) &&
1.1798 + !IsElement()) ||
1.1799 + !aNewChild->IsNodeOfType(eCONTENT)) {
1.1800 + aError.Throw(NS_ERROR_DOM_HIERARCHY_REQUEST_ERR);
1.1801 + return nullptr;
1.1802 + }
1.1803 +
1.1804 + uint16_t nodeType = aNewChild->NodeType();
1.1805 +
1.1806 + // Before we do anything else, fire all DOMNodeRemoved mutation events
1.1807 + // We do this up front as to avoid having to deal with script running
1.1808 + // at random places further down.
1.1809 + // Scope firing mutation events so that we don't carry any state that
1.1810 + // might be stale
1.1811 + {
1.1812 + // This check happens again further down (though then using IndexOf).
1.1813 + // We're only checking this here to avoid firing mutation events when
1.1814 + // none should be fired.
1.1815 + // It's ok that we do the check twice in the case when firing mutation
1.1816 + // events as we need to recheck after running script anyway.
1.1817 + if (aRefChild && aRefChild->GetParentNode() != this) {
1.1818 + aError.Throw(NS_ERROR_DOM_NOT_FOUND_ERR);
1.1819 + return nullptr;
1.1820 + }
1.1821 +
1.1822 + // If we're replacing, fire for node-to-be-replaced.
1.1823 + // If aRefChild == aNewChild then we'll fire for it in check below
1.1824 + if (aReplace && aRefChild != aNewChild) {
1.1825 + nsContentUtils::MaybeFireNodeRemoved(aRefChild, this, OwnerDoc());
1.1826 + }
1.1827 +
1.1828 + // If the new node already has a parent, fire for removing from old
1.1829 + // parent
1.1830 + nsINode* oldParent = aNewChild->GetParentNode();
1.1831 + if (oldParent) {
1.1832 + nsContentUtils::MaybeFireNodeRemoved(aNewChild, oldParent,
1.1833 + aNewChild->OwnerDoc());
1.1834 + }
1.1835 +
1.1836 + // If we're inserting a fragment, fire for all the children of the
1.1837 + // fragment
1.1838 + if (nodeType == nsIDOMNode::DOCUMENT_FRAGMENT_NODE) {
1.1839 + static_cast<FragmentOrElement*>(aNewChild)->FireNodeRemovedForChildren();
1.1840 + }
1.1841 + // Verify that our aRefChild is still sensible
1.1842 + if (aRefChild && aRefChild->GetParentNode() != this) {
1.1843 + aError.Throw(NS_ERROR_DOM_NOT_FOUND_ERR);
1.1844 + return nullptr;
1.1845 + }
1.1846 + }
1.1847 +
1.1848 + nsIDocument* doc = OwnerDoc();
1.1849 + nsIContent* newContent = static_cast<nsIContent*>(aNewChild);
1.1850 + if (newContent->IsRootOfAnonymousSubtree()) {
1.1851 + // This is anonymous content. Don't allow its insertion
1.1852 + // anywhere, since it might have UnbindFromTree calls coming
1.1853 + // its way.
1.1854 + aError.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
1.1855 + return nullptr;
1.1856 + }
1.1857 +
1.1858 + // Make sure that the inserted node is allowed as a child of its new parent.
1.1859 + if (!IsAllowedAsChild(newContent, this, aReplace, aRefChild)) {
1.1860 + aError.Throw(NS_ERROR_DOM_HIERARCHY_REQUEST_ERR);
1.1861 + return nullptr;
1.1862 + }
1.1863 +
1.1864 + // Record the node to insert before, if any
1.1865 + nsINode* nodeToInsertBefore;
1.1866 + if (aReplace) {
1.1867 + nodeToInsertBefore = aRefChild->GetNextSibling();
1.1868 + } else {
1.1869 + nodeToInsertBefore = aRefChild;
1.1870 + }
1.1871 + if (nodeToInsertBefore == aNewChild) {
1.1872 + // We're going to remove aNewChild from its parent, so use its next sibling
1.1873 + // as the node to insert before.
1.1874 + nodeToInsertBefore = nodeToInsertBefore->GetNextSibling();
1.1875 + }
1.1876 +
1.1877 + Maybe<nsAutoTArray<nsCOMPtr<nsIContent>, 50> > fragChildren;
1.1878 +
1.1879 + // Remove the new child from the old parent if one exists
1.1880 + nsCOMPtr<nsINode> oldParent = newContent->GetParentNode();
1.1881 + if (oldParent) {
1.1882 + int32_t removeIndex = oldParent->IndexOf(newContent);
1.1883 + if (removeIndex < 0) {
1.1884 + // newContent is anonymous. We can't deal with this, so just bail
1.1885 + NS_ERROR("How come our flags didn't catch this?");
1.1886 + aError.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
1.1887 + return nullptr;
1.1888 + }
1.1889 +
1.1890 + // Hold a strong ref to nodeToInsertBefore across the removal of newContent
1.1891 + nsCOMPtr<nsINode> kungFuDeathGrip = nodeToInsertBefore;
1.1892 +
1.1893 + // Removing a child can run script, via XBL destructors.
1.1894 + nsMutationGuard guard;
1.1895 +
1.1896 + // Scope for the mutation batch and scriptblocker, so they go away
1.1897 + // while kungFuDeathGrip is still alive.
1.1898 + {
1.1899 + mozAutoDocUpdate batch(newContent->GetCurrentDoc(),
1.1900 + UPDATE_CONTENT_MODEL, true);
1.1901 + nsAutoMutationBatch mb(oldParent, true, true);
1.1902 + oldParent->RemoveChildAt(removeIndex, true);
1.1903 + if (nsAutoMutationBatch::GetCurrentBatch() == &mb) {
1.1904 + mb.RemovalDone();
1.1905 + mb.SetPrevSibling(oldParent->GetChildAt(removeIndex - 1));
1.1906 + mb.SetNextSibling(oldParent->GetChildAt(removeIndex));
1.1907 + }
1.1908 + }
1.1909 +
1.1910 + // We expect one mutation (the removal) to have happened.
1.1911 + if (guard.Mutated(1)) {
1.1912 + // XBL destructors, yuck.
1.1913 +
1.1914 + // Verify that nodeToInsertBefore, if non-null, is still our child. If
1.1915 + // it's not, there's no way we can do this insert sanely; just bail out.
1.1916 + if (nodeToInsertBefore && nodeToInsertBefore->GetParent() != this) {
1.1917 + aError.Throw(NS_ERROR_DOM_HIERARCHY_REQUEST_ERR);
1.1918 + return nullptr;
1.1919 + }
1.1920 +
1.1921 + // Verify that newContent has no parent.
1.1922 + if (newContent->GetParentNode()) {
1.1923 + aError.Throw(NS_ERROR_DOM_HIERARCHY_REQUEST_ERR);
1.1924 + return nullptr;
1.1925 + }
1.1926 +
1.1927 + // And verify that newContent is still allowed as our child.
1.1928 + if (aNewChild == aRefChild) {
1.1929 + // We've already removed aRefChild. So even if we were doing a replace,
1.1930 + // now we're doing a simple insert before nodeToInsertBefore.
1.1931 + if (!IsAllowedAsChild(newContent, this, false, nodeToInsertBefore)) {
1.1932 + aError.Throw(NS_ERROR_DOM_HIERARCHY_REQUEST_ERR);
1.1933 + return nullptr;
1.1934 + }
1.1935 + } else {
1.1936 + if ((aRefChild && aRefChild->GetParent() != this) ||
1.1937 + !IsAllowedAsChild(newContent, this, aReplace, aRefChild)) {
1.1938 + aError.Throw(NS_ERROR_DOM_HIERARCHY_REQUEST_ERR);
1.1939 + return nullptr;
1.1940 + }
1.1941 + // And recompute nodeToInsertBefore, just in case.
1.1942 + if (aReplace) {
1.1943 + nodeToInsertBefore = aRefChild->GetNextSibling();
1.1944 + } else {
1.1945 + nodeToInsertBefore = aRefChild;
1.1946 + }
1.1947 + }
1.1948 + }
1.1949 + } else if (nodeType == nsIDOMNode::DOCUMENT_FRAGMENT_NODE) {
1.1950 + // Make sure to remove all the fragment's kids. We need to do this before
1.1951 + // we start inserting anything, so we will run out XBL destructors and
1.1952 + // binding teardown (GOD, I HATE THESE THINGS) before we insert anything
1.1953 + // into the DOM.
1.1954 + uint32_t count = newContent->GetChildCount();
1.1955 +
1.1956 + fragChildren.construct();
1.1957 +
1.1958 + // Copy the children into a separate array to avoid having to deal with
1.1959 + // mutations to the fragment later on here.
1.1960 + fragChildren.ref().SetCapacity(count);
1.1961 + for (nsIContent* child = newContent->GetFirstChild();
1.1962 + child;
1.1963 + child = child->GetNextSibling()) {
1.1964 + NS_ASSERTION(child->GetCurrentDoc() == nullptr,
1.1965 + "How did we get a child with a current doc?");
1.1966 + fragChildren.ref().AppendElement(child);
1.1967 + }
1.1968 +
1.1969 + // Hold a strong ref to nodeToInsertBefore across the removals
1.1970 + nsCOMPtr<nsINode> kungFuDeathGrip = nodeToInsertBefore;
1.1971 +
1.1972 + nsMutationGuard guard;
1.1973 +
1.1974 + // Scope for the mutation batch and scriptblocker, so they go away
1.1975 + // while kungFuDeathGrip is still alive.
1.1976 + {
1.1977 + mozAutoDocUpdate batch(newContent->GetCurrentDoc(),
1.1978 + UPDATE_CONTENT_MODEL, true);
1.1979 + nsAutoMutationBatch mb(newContent, false, true);
1.1980 +
1.1981 + for (uint32_t i = count; i > 0;) {
1.1982 + newContent->RemoveChildAt(--i, true);
1.1983 + }
1.1984 + }
1.1985 +
1.1986 + // We expect |count| removals
1.1987 + if (guard.Mutated(count)) {
1.1988 + // XBL destructors, yuck.
1.1989 +
1.1990 + // Verify that nodeToInsertBefore, if non-null, is still our child. If
1.1991 + // it's not, there's no way we can do this insert sanely; just bail out.
1.1992 + if (nodeToInsertBefore && nodeToInsertBefore->GetParent() != this) {
1.1993 + aError.Throw(NS_ERROR_DOM_HIERARCHY_REQUEST_ERR);
1.1994 + return nullptr;
1.1995 + }
1.1996 +
1.1997 + // Verify that all the things in fragChildren have no parent.
1.1998 + for (uint32_t i = 0; i < count; ++i) {
1.1999 + if (fragChildren.ref().ElementAt(i)->GetParentNode()) {
1.2000 + aError.Throw(NS_ERROR_DOM_HIERARCHY_REQUEST_ERR);
1.2001 + return nullptr;
1.2002 + }
1.2003 + }
1.2004 +
1.2005 + // Note that unlike the single-element case above, none of our kids can
1.2006 + // be aRefChild, so we can always pass through aReplace in the
1.2007 + // IsAllowedAsChild checks below and don't have to worry about whether
1.2008 + // recomputing nodeToInsertBefore is OK.
1.2009 +
1.2010 + // Verify that our aRefChild is still sensible
1.2011 + if (aRefChild && aRefChild->GetParent() != this) {
1.2012 + aError.Throw(NS_ERROR_DOM_HIERARCHY_REQUEST_ERR);
1.2013 + return nullptr;
1.2014 + }
1.2015 +
1.2016 + // Recompute nodeToInsertBefore, just in case.
1.2017 + if (aReplace) {
1.2018 + nodeToInsertBefore = aRefChild->GetNextSibling();
1.2019 + } else {
1.2020 + nodeToInsertBefore = aRefChild;
1.2021 + }
1.2022 +
1.2023 + // And verify that newContent is still allowed as our child. Sadly, we
1.2024 + // need to reimplement the relevant part of IsAllowedAsChild() because
1.2025 + // now our nodes are in an array and all. If you change this code,
1.2026 + // change the code there.
1.2027 + if (IsNodeOfType(nsINode::eDOCUMENT)) {
1.2028 + bool sawElement = false;
1.2029 + for (uint32_t i = 0; i < count; ++i) {
1.2030 + nsIContent* child = fragChildren.ref().ElementAt(i);
1.2031 + if (child->IsElement()) {
1.2032 + if (sawElement) {
1.2033 + // No good
1.2034 + aError.Throw(NS_ERROR_DOM_HIERARCHY_REQUEST_ERR);
1.2035 + return nullptr;
1.2036 + }
1.2037 + sawElement = true;
1.2038 + }
1.2039 + if (!IsAllowedAsChild(child, this, aReplace, aRefChild)) {
1.2040 + aError.Throw(NS_ERROR_DOM_HIERARCHY_REQUEST_ERR);
1.2041 + return nullptr;
1.2042 + }
1.2043 + }
1.2044 + }
1.2045 + }
1.2046 + }
1.2047 +
1.2048 + mozAutoDocUpdate batch(GetCurrentDoc(), UPDATE_CONTENT_MODEL, true);
1.2049 + nsAutoMutationBatch mb;
1.2050 +
1.2051 + // Figure out which index we want to insert at. Note that we use
1.2052 + // nodeToInsertBefore to determine this, because it's possible that
1.2053 + // aRefChild == aNewChild, in which case we just removed it from the
1.2054 + // parent list.
1.2055 + int32_t insPos;
1.2056 + if (nodeToInsertBefore) {
1.2057 + insPos = IndexOf(nodeToInsertBefore);
1.2058 + if (insPos < 0) {
1.2059 + // XXXbz How the heck would _that_ happen, exactly?
1.2060 + aError.Throw(NS_ERROR_DOM_NOT_FOUND_ERR);
1.2061 + return nullptr;
1.2062 + }
1.2063 + }
1.2064 + else {
1.2065 + insPos = GetChildCount();
1.2066 + }
1.2067 +
1.2068 + // If we're replacing and we haven't removed aRefChild yet, do so now
1.2069 + if (aReplace && aRefChild != aNewChild) {
1.2070 + mb.Init(this, true, true);
1.2071 +
1.2072 + // Since aRefChild is never null in the aReplace case, we know that at
1.2073 + // this point nodeToInsertBefore is the next sibling of aRefChild.
1.2074 + NS_ASSERTION(aRefChild->GetNextSibling() == nodeToInsertBefore,
1.2075 + "Unexpected nodeToInsertBefore");
1.2076 +
1.2077 + // An since nodeToInsertBefore is at index insPos, we want to remove
1.2078 + // at the previous index.
1.2079 + NS_ASSERTION(insPos >= 1, "insPos too small");
1.2080 + RemoveChildAt(insPos-1, true);
1.2081 + --insPos;
1.2082 + }
1.2083 +
1.2084 + // Move new child over to our document if needed. Do this after removing
1.2085 + // it from its parent so that AdoptNode doesn't fire DOMNodeRemoved
1.2086 + // DocumentType nodes are the only nodes that can have a null
1.2087 + // ownerDocument according to the DOM spec, and we need to allow
1.2088 + // inserting them w/o calling AdoptNode().
1.2089 + if (doc != newContent->OwnerDoc()) {
1.2090 + aError = AdoptNodeIntoOwnerDoc(this, aNewChild);
1.2091 + if (aError.Failed()) {
1.2092 + return nullptr;
1.2093 + }
1.2094 + } else if (doc->DidDocumentOpen()) {
1.2095 + aError = CheckForOutdatedParent(this, aNewChild);
1.2096 + if (aError.Failed()) {
1.2097 + return nullptr;
1.2098 + }
1.2099 + }
1.2100 +
1.2101 + /*
1.2102 + * Check if we're inserting a document fragment. If we are, we need
1.2103 + * to actually add its children individually (i.e. we don't add the
1.2104 + * actual document fragment).
1.2105 + */
1.2106 + nsINode* result = aReplace ? aRefChild : aNewChild;
1.2107 + if (nodeType == nsIDOMNode::DOCUMENT_FRAGMENT_NODE) {
1.2108 + if (!aReplace) {
1.2109 + mb.Init(this, true, true);
1.2110 + }
1.2111 + nsAutoMutationBatch* mutationBatch = nsAutoMutationBatch::GetCurrentBatch();
1.2112 + if (mutationBatch) {
1.2113 + mutationBatch->RemovalDone();
1.2114 + mutationBatch->SetPrevSibling(GetChildAt(insPos - 1));
1.2115 + mutationBatch->SetNextSibling(GetChildAt(insPos));
1.2116 + }
1.2117 +
1.2118 + uint32_t count = fragChildren.ref().Length();
1.2119 + if (!count) {
1.2120 + return result;
1.2121 + }
1.2122 +
1.2123 + bool appending =
1.2124 + !IsNodeOfType(eDOCUMENT) && uint32_t(insPos) == GetChildCount();
1.2125 + int32_t firstInsPos = insPos;
1.2126 + nsIContent* firstInsertedContent = fragChildren.ref().ElementAt(0);
1.2127 +
1.2128 + // Iterate through the fragment's children, and insert them in the new
1.2129 + // parent
1.2130 + for (uint32_t i = 0; i < count; ++i, ++insPos) {
1.2131 + // XXXbz how come no reparenting here? That seems odd...
1.2132 + // Insert the child.
1.2133 + aError = InsertChildAt(fragChildren.ref().ElementAt(i), insPos,
1.2134 + !appending);
1.2135 + if (aError.Failed()) {
1.2136 + // Make sure to notify on any children that we did succeed to insert
1.2137 + if (appending && i != 0) {
1.2138 + nsNodeUtils::ContentAppended(static_cast<nsIContent*>(this),
1.2139 + firstInsertedContent,
1.2140 + firstInsPos);
1.2141 + }
1.2142 + return nullptr;
1.2143 + }
1.2144 + }
1.2145 +
1.2146 + if (mutationBatch && !appending) {
1.2147 + mutationBatch->NodesAdded();
1.2148 + }
1.2149 +
1.2150 + // Notify and fire mutation events when appending
1.2151 + if (appending) {
1.2152 + nsNodeUtils::ContentAppended(static_cast<nsIContent*>(this),
1.2153 + firstInsertedContent, firstInsPos);
1.2154 + if (mutationBatch) {
1.2155 + mutationBatch->NodesAdded();
1.2156 + }
1.2157 + // Optimize for the case when there are no listeners
1.2158 + if (nsContentUtils::
1.2159 + HasMutationListeners(doc, NS_EVENT_BITS_MUTATION_NODEINSERTED)) {
1.2160 + Element::FireNodeInserted(doc, this, fragChildren.ref());
1.2161 + }
1.2162 + }
1.2163 + }
1.2164 + else {
1.2165 + // Not inserting a fragment but rather a single node.
1.2166 +
1.2167 + // FIXME https://bugzilla.mozilla.org/show_bug.cgi?id=544654
1.2168 + // We need to reparent here for nodes for which the parent of their
1.2169 + // wrapper is not the wrapper for their ownerDocument (XUL elements,
1.2170 + // form controls, ...). Also applies in the fragment code above.
1.2171 +
1.2172 + if (nsAutoMutationBatch::GetCurrentBatch() == &mb) {
1.2173 + mb.RemovalDone();
1.2174 + mb.SetPrevSibling(GetChildAt(insPos - 1));
1.2175 + mb.SetNextSibling(GetChildAt(insPos));
1.2176 + }
1.2177 + aError = InsertChildAt(newContent, insPos, true);
1.2178 + if (aError.Failed()) {
1.2179 + return nullptr;
1.2180 + }
1.2181 + }
1.2182 +
1.2183 + return result;
1.2184 +}
1.2185 +
1.2186 +nsresult
1.2187 +nsINode::ReplaceOrInsertBefore(bool aReplace, nsIDOMNode *aNewChild,
1.2188 + nsIDOMNode *aRefChild, nsIDOMNode **aReturn)
1.2189 +{
1.2190 + nsCOMPtr<nsINode> newChild = do_QueryInterface(aNewChild);
1.2191 + if (!newChild) {
1.2192 + return NS_ERROR_NULL_POINTER;
1.2193 + }
1.2194 +
1.2195 + if (aReplace && !aRefChild) {
1.2196 + return NS_ERROR_NULL_POINTER;
1.2197 + }
1.2198 +
1.2199 + nsCOMPtr<nsINode> refChild = do_QueryInterface(aRefChild);
1.2200 + if (aRefChild && !refChild) {
1.2201 + return NS_NOINTERFACE;
1.2202 + }
1.2203 +
1.2204 + ErrorResult rv;
1.2205 + nsINode* result = ReplaceOrInsertBefore(aReplace, newChild, refChild, rv);
1.2206 + if (result) {
1.2207 + NS_ADDREF(*aReturn = result->AsDOMNode());
1.2208 + }
1.2209 + return rv.ErrorCode();
1.2210 +}
1.2211 +
1.2212 +nsresult
1.2213 +nsINode::CompareDocumentPosition(nsIDOMNode* aOther, uint16_t* aReturn)
1.2214 +{
1.2215 + nsCOMPtr<nsINode> other = do_QueryInterface(aOther);
1.2216 + NS_ENSURE_ARG(other);
1.2217 + *aReturn = CompareDocumentPosition(*other);
1.2218 + return NS_OK;
1.2219 +}
1.2220 +
1.2221 +nsresult
1.2222 +nsINode::IsEqualNode(nsIDOMNode* aOther, bool* aReturn)
1.2223 +{
1.2224 + nsCOMPtr<nsINode> other = do_QueryInterface(aOther);
1.2225 + *aReturn = IsEqualNode(other);
1.2226 + return NS_OK;
1.2227 +}
1.2228 +
1.2229 +void
1.2230 +nsINode::BindObject(nsISupports* aObject)
1.2231 +{
1.2232 + nsCOMArray<nsISupports>* objects =
1.2233 + static_cast<nsCOMArray<nsISupports>*>(GetProperty(nsGkAtoms::keepobjectsalive));
1.2234 + if (!objects) {
1.2235 + objects = new nsCOMArray<nsISupports>();
1.2236 + SetProperty(nsGkAtoms::keepobjectsalive, objects,
1.2237 + nsINode::DeleteProperty< nsCOMArray<nsISupports> >, true);
1.2238 + }
1.2239 + objects->AppendObject(aObject);
1.2240 +}
1.2241 +
1.2242 +void
1.2243 +nsINode::UnbindObject(nsISupports* aObject)
1.2244 +{
1.2245 + nsCOMArray<nsISupports>* objects =
1.2246 + static_cast<nsCOMArray<nsISupports>*>(GetProperty(nsGkAtoms::keepobjectsalive));
1.2247 + if (objects) {
1.2248 + objects->RemoveObject(aObject);
1.2249 + }
1.2250 +}
1.2251 +
1.2252 +void
1.2253 +nsINode::GetBoundMutationObservers(nsTArray<nsRefPtr<nsDOMMutationObserver> >& aResult)
1.2254 +{
1.2255 + nsCOMArray<nsISupports>* objects =
1.2256 + static_cast<nsCOMArray<nsISupports>*>(GetProperty(nsGkAtoms::keepobjectsalive));
1.2257 + if (objects) {
1.2258 + for (int32_t i = 0; i < objects->Count(); ++i) {
1.2259 + nsCOMPtr<nsDOMMutationObserver> mo = do_QueryInterface(objects->ObjectAt(i));
1.2260 + if (mo) {
1.2261 + MOZ_ASSERT(!aResult.Contains(mo));
1.2262 + aResult.AppendElement(mo);
1.2263 + }
1.2264 + }
1.2265 + }
1.2266 +}
1.2267 +
1.2268 +size_t
1.2269 +nsINode::SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const
1.2270 +{
1.2271 + size_t n = 0;
1.2272 + EventListenerManager* elm = GetExistingListenerManager();
1.2273 + if (elm) {
1.2274 + n += elm->SizeOfIncludingThis(aMallocSizeOf);
1.2275 + }
1.2276 +
1.2277 + // Measurement of the following members may be added later if DMD finds it is
1.2278 + // worthwhile:
1.2279 + // - mNodeInfo
1.2280 + // - mSlots
1.2281 + //
1.2282 + // The following members are not measured:
1.2283 + // - mParent, mNextSibling, mPreviousSibling, mFirstChild: because they're
1.2284 + // non-owning
1.2285 + return n;
1.2286 +}
1.2287 +
1.2288 +#define EVENT(name_, id_, type_, struct_) \
1.2289 + EventHandlerNonNull* nsINode::GetOn##name_() { \
1.2290 + EventListenerManager *elm = GetExistingListenerManager(); \
1.2291 + return elm ? elm->GetEventHandler(nsGkAtoms::on##name_, EmptyString()) \
1.2292 + : nullptr; \
1.2293 + } \
1.2294 + void nsINode::SetOn##name_(EventHandlerNonNull* handler) \
1.2295 + { \
1.2296 + EventListenerManager *elm = GetOrCreateListenerManager(); \
1.2297 + if (elm) { \
1.2298 + elm->SetEventHandler(nsGkAtoms::on##name_, EmptyString(), handler); \
1.2299 + } \
1.2300 + }
1.2301 +#define TOUCH_EVENT EVENT
1.2302 +#define DOCUMENT_ONLY_EVENT EVENT
1.2303 +#include "mozilla/EventNameList.h"
1.2304 +#undef DOCUMENT_ONLY_EVENT
1.2305 +#undef TOUCH_EVENT
1.2306 +#undef EVENT
1.2307 +
1.2308 +bool
1.2309 +nsINode::Contains(const nsINode* aOther) const
1.2310 +{
1.2311 + if (aOther == this) {
1.2312 + return true;
1.2313 + }
1.2314 + if (!aOther ||
1.2315 + OwnerDoc() != aOther->OwnerDoc() ||
1.2316 + IsInDoc() != aOther->IsInDoc() ||
1.2317 + !(aOther->IsElement() ||
1.2318 + aOther->IsNodeOfType(nsINode::eCONTENT)) ||
1.2319 + !GetFirstChild()) {
1.2320 + return false;
1.2321 + }
1.2322 +
1.2323 + const nsIContent* other = static_cast<const nsIContent*>(aOther);
1.2324 + if (this == OwnerDoc()) {
1.2325 + // document.contains(aOther) returns true if aOther is in the document,
1.2326 + // but is not in any anonymous subtree.
1.2327 + // IsInDoc() check is done already before this.
1.2328 + return !other->IsInAnonymousSubtree();
1.2329 + }
1.2330 +
1.2331 + if (!IsElement() && !IsNodeOfType(nsINode::eDOCUMENT_FRAGMENT)) {
1.2332 + return false;
1.2333 + }
1.2334 +
1.2335 + const nsIContent* thisContent = static_cast<const nsIContent*>(this);
1.2336 + if (thisContent->GetBindingParent() != other->GetBindingParent()) {
1.2337 + return false;
1.2338 + }
1.2339 +
1.2340 + return nsContentUtils::ContentIsDescendantOf(other, this);
1.2341 +}
1.2342 +
1.2343 +nsresult
1.2344 +nsINode::Contains(nsIDOMNode* aOther, bool* aReturn)
1.2345 +{
1.2346 + nsCOMPtr<nsINode> node = do_QueryInterface(aOther);
1.2347 + *aReturn = Contains(node);
1.2348 + return NS_OK;
1.2349 +}
1.2350 +
1.2351 +uint32_t
1.2352 +nsINode::Length() const
1.2353 +{
1.2354 + switch (NodeType()) {
1.2355 + case nsIDOMNode::DOCUMENT_TYPE_NODE:
1.2356 + return 0;
1.2357 +
1.2358 + case nsIDOMNode::TEXT_NODE:
1.2359 + case nsIDOMNode::CDATA_SECTION_NODE:
1.2360 + case nsIDOMNode::PROCESSING_INSTRUCTION_NODE:
1.2361 + case nsIDOMNode::COMMENT_NODE:
1.2362 + MOZ_ASSERT(IsNodeOfType(eCONTENT));
1.2363 + return static_cast<const nsIContent*>(this)->TextLength();
1.2364 +
1.2365 + default:
1.2366 + return GetChildCount();
1.2367 + }
1.2368 +}
1.2369 +
1.2370 +nsCSSSelectorList*
1.2371 +nsINode::ParseSelectorList(const nsAString& aSelectorString,
1.2372 + ErrorResult& aRv)
1.2373 +{
1.2374 + nsIDocument* doc = OwnerDoc();
1.2375 + nsIDocument::SelectorCache& cache = doc->GetSelectorCache();
1.2376 + nsCSSSelectorList* selectorList = nullptr;
1.2377 + bool haveCachedList = cache.GetList(aSelectorString, &selectorList);
1.2378 + if (haveCachedList) {
1.2379 + if (!selectorList) {
1.2380 + // Invalid selector.
1.2381 + aRv.Throw(NS_ERROR_DOM_SYNTAX_ERR);
1.2382 + }
1.2383 + return selectorList;
1.2384 + }
1.2385 +
1.2386 + nsCSSParser parser(doc->CSSLoader());
1.2387 +
1.2388 + aRv = parser.ParseSelectorString(aSelectorString,
1.2389 + doc->GetDocumentURI(),
1.2390 + 0, // XXXbz get the line number!
1.2391 + &selectorList);
1.2392 + if (aRv.Failed()) {
1.2393 + // We hit this for syntax errors, which are quite common, so don't
1.2394 + // use NS_ENSURE_SUCCESS. (For example, jQuery has an extended set
1.2395 + // of selectors, but it sees if we can parse them first.)
1.2396 + MOZ_ASSERT(aRv.ErrorCode() == NS_ERROR_DOM_SYNTAX_ERR,
1.2397 + "Unexpected error, so cached version won't return it");
1.2398 + cache.CacheList(aSelectorString, nullptr);
1.2399 + return nullptr;
1.2400 + }
1.2401 +
1.2402 + // Filter out pseudo-element selectors from selectorList
1.2403 + nsCSSSelectorList** slot = &selectorList;
1.2404 + do {
1.2405 + nsCSSSelectorList* cur = *slot;
1.2406 + if (cur->mSelectors->IsPseudoElement()) {
1.2407 + *slot = cur->mNext;
1.2408 + cur->mNext = nullptr;
1.2409 + delete cur;
1.2410 + } else {
1.2411 + slot = &cur->mNext;
1.2412 + }
1.2413 + } while (*slot);
1.2414 +
1.2415 + if (selectorList) {
1.2416 + NS_ASSERTION(selectorList->mSelectors,
1.2417 + "How can we not have any selectors?");
1.2418 + cache.CacheList(aSelectorString, selectorList);
1.2419 + } else {
1.2420 + // This is the "only pseudo-element selectors" case, which is
1.2421 + // not common, so just don't worry about caching it. That way a
1.2422 + // null cached value can always indicate an invalid selector.
1.2423 + }
1.2424 +
1.2425 + return selectorList;
1.2426 +}
1.2427 +
1.2428 +static void
1.2429 +AddScopeElements(TreeMatchContext& aMatchContext,
1.2430 + nsINode* aMatchContextNode)
1.2431 +{
1.2432 + if (aMatchContextNode->IsElement()) {
1.2433 + aMatchContext.SetHasSpecifiedScope();
1.2434 + aMatchContext.AddScopeElement(aMatchContextNode->AsElement());
1.2435 + }
1.2436 +}
1.2437 +
1.2438 +namespace {
1.2439 +struct SelectorMatchInfo {
1.2440 + nsCSSSelectorList* const mSelectorList;
1.2441 + TreeMatchContext& mMatchContext;
1.2442 +};
1.2443 +}
1.2444 +
1.2445 +// Given an id, find elements with that id under aRoot that match aMatchInfo if
1.2446 +// any is provided. If no SelectorMatchInfo is provided, just find the ones
1.2447 +// with the given id. aRoot must be in the document.
1.2448 +template<bool onlyFirstMatch, class T>
1.2449 +inline static void
1.2450 +FindMatchingElementsWithId(const nsAString& aId, nsINode* aRoot,
1.2451 + SelectorMatchInfo* aMatchInfo,
1.2452 + T& aList)
1.2453 +{
1.2454 + MOZ_ASSERT(aRoot->IsInDoc(),
1.2455 + "Don't call me if the root is not in the document");
1.2456 + MOZ_ASSERT(aRoot->IsElement() || aRoot->IsNodeOfType(nsINode::eDOCUMENT),
1.2457 + "The optimization below to check ContentIsDescendantOf only for "
1.2458 + "elements depends on aRoot being either an element or a "
1.2459 + "document if it's in the document. Note that document fragments "
1.2460 + "can't be IsInDoc(), so should never show up here.");
1.2461 +
1.2462 + const nsSmallVoidArray* elements = aRoot->OwnerDoc()->GetAllElementsForId(aId);
1.2463 +
1.2464 + if (!elements) {
1.2465 + // Nothing to do; we're done
1.2466 + return;
1.2467 + }
1.2468 +
1.2469 + // XXXbz: Should we fall back to the tree walk if aRoot is not the
1.2470 + // document and |elements| is long, for some value of "long"?
1.2471 + for (int32_t i = 0; i < elements->Count(); ++i) {
1.2472 + Element *element = static_cast<Element*>(elements->ElementAt(i));
1.2473 + if (!aRoot->IsElement() ||
1.2474 + (element != aRoot &&
1.2475 + nsContentUtils::ContentIsDescendantOf(element, aRoot))) {
1.2476 + // We have an element with the right id and it's a strict descendant
1.2477 + // of aRoot. Make sure it really matches the selector.
1.2478 + if (!aMatchInfo ||
1.2479 + nsCSSRuleProcessor::SelectorListMatches(element,
1.2480 + aMatchInfo->mMatchContext,
1.2481 + aMatchInfo->mSelectorList)) {
1.2482 + aList.AppendElement(element);
1.2483 + if (onlyFirstMatch) {
1.2484 + return;
1.2485 + }
1.2486 + }
1.2487 + }
1.2488 + }
1.2489 +}
1.2490 +
1.2491 +// Actually find elements matching aSelectorList (which must not be
1.2492 +// null) and which are descendants of aRoot and put them in aList. If
1.2493 +// onlyFirstMatch, then stop once the first one is found.
1.2494 +template<bool onlyFirstMatch, class Collector, class T>
1.2495 +MOZ_ALWAYS_INLINE static void
1.2496 +FindMatchingElements(nsINode* aRoot, nsCSSSelectorList* aSelectorList, T &aList,
1.2497 + ErrorResult& aRv)
1.2498 +{
1.2499 + nsIDocument* doc = aRoot->OwnerDoc();
1.2500 +
1.2501 + TreeMatchContext matchingContext(false, nsRuleWalker::eRelevantLinkUnvisited,
1.2502 + doc, TreeMatchContext::eNeverMatchVisited);
1.2503 + doc->FlushPendingLinkUpdates();
1.2504 + AddScopeElements(matchingContext, aRoot);
1.2505 +
1.2506 + // Fast-path selectors involving IDs. We can only do this if aRoot
1.2507 + // is in the document and the document is not in quirks mode, since
1.2508 + // ID selectors are case-insensitive in quirks mode. Also, only do
1.2509 + // this if aSelectorList only has one selector, because otherwise
1.2510 + // ordering the elements correctly is a pain.
1.2511 + NS_ASSERTION(aRoot->IsElement() || aRoot->IsNodeOfType(nsINode::eDOCUMENT) ||
1.2512 + !aRoot->IsInDoc(),
1.2513 + "The optimization below to check ContentIsDescendantOf only for "
1.2514 + "elements depends on aRoot being either an element or a "
1.2515 + "document if it's in the document.");
1.2516 + if (aRoot->IsInDoc() &&
1.2517 + doc->GetCompatibilityMode() != eCompatibility_NavQuirks &&
1.2518 + !aSelectorList->mNext &&
1.2519 + aSelectorList->mSelectors->mIDList) {
1.2520 + nsIAtom* id = aSelectorList->mSelectors->mIDList->mAtom;
1.2521 + SelectorMatchInfo info = { aSelectorList, matchingContext };
1.2522 + FindMatchingElementsWithId<onlyFirstMatch, T>(nsDependentAtomString(id),
1.2523 + aRoot, &info, aList);
1.2524 + return;
1.2525 + }
1.2526 +
1.2527 + Collector results;
1.2528 + for (nsIContent* cur = aRoot->GetFirstChild();
1.2529 + cur;
1.2530 + cur = cur->GetNextNode(aRoot)) {
1.2531 + if (cur->IsElement() &&
1.2532 + nsCSSRuleProcessor::SelectorListMatches(cur->AsElement(),
1.2533 + matchingContext,
1.2534 + aSelectorList)) {
1.2535 + if (onlyFirstMatch) {
1.2536 + aList.AppendElement(cur->AsElement());
1.2537 + return;
1.2538 + }
1.2539 + results.AppendElement(cur->AsElement());
1.2540 + }
1.2541 + }
1.2542 +
1.2543 + const uint32_t len = results.Length();
1.2544 + if (len) {
1.2545 + aList.SetCapacity(len);
1.2546 + for (uint32_t i = 0; i < len; ++i) {
1.2547 + aList.AppendElement(results.ElementAt(i));
1.2548 + }
1.2549 + }
1.2550 +}
1.2551 +
1.2552 +struct ElementHolder {
1.2553 + ElementHolder() : mElement(nullptr) {}
1.2554 + void AppendElement(Element* aElement) {
1.2555 + NS_ABORT_IF_FALSE(!mElement, "Should only get one element");
1.2556 + mElement = aElement;
1.2557 + }
1.2558 + void SetCapacity(uint32_t aCapacity) { MOZ_CRASH("Don't call me!"); }
1.2559 + uint32_t Length() { return 0; }
1.2560 + Element* ElementAt(uint32_t aIndex) { return nullptr; }
1.2561 +
1.2562 + Element* mElement;
1.2563 +};
1.2564 +
1.2565 +Element*
1.2566 +nsINode::QuerySelector(const nsAString& aSelector, ErrorResult& aResult)
1.2567 +{
1.2568 + nsCSSSelectorList* selectorList = ParseSelectorList(aSelector, aResult);
1.2569 + if (!selectorList) {
1.2570 + // Either we failed (and aResult already has the exception), or this
1.2571 + // is a pseudo-element-only selector that matches nothing.
1.2572 + return nullptr;
1.2573 + }
1.2574 + ElementHolder holder;
1.2575 + FindMatchingElements<true, ElementHolder>(this, selectorList, holder, aResult);
1.2576 + return holder.mElement;
1.2577 +}
1.2578 +
1.2579 +already_AddRefed<nsINodeList>
1.2580 +nsINode::QuerySelectorAll(const nsAString& aSelector, ErrorResult& aResult)
1.2581 +{
1.2582 + nsRefPtr<nsSimpleContentList> contentList = new nsSimpleContentList(this);
1.2583 +
1.2584 + nsCSSSelectorList* selectorList = ParseSelectorList(aSelector, aResult);
1.2585 + if (selectorList) {
1.2586 + FindMatchingElements<false, nsAutoTArray<Element*, 128>>(this,
1.2587 + selectorList,
1.2588 + *contentList,
1.2589 + aResult);
1.2590 + } else {
1.2591 + // Either we failed (and aResult already has the exception), or this
1.2592 + // is a pseudo-element-only selector that matches nothing.
1.2593 + }
1.2594 +
1.2595 + return contentList.forget();
1.2596 +}
1.2597 +
1.2598 +nsresult
1.2599 +nsINode::QuerySelector(const nsAString& aSelector, nsIDOMElement **aReturn)
1.2600 +{
1.2601 + ErrorResult rv;
1.2602 + Element* result = nsINode::QuerySelector(aSelector, rv);
1.2603 + if (rv.Failed()) {
1.2604 + return rv.ErrorCode();
1.2605 + }
1.2606 + nsCOMPtr<nsIDOMElement> elt = do_QueryInterface(result);
1.2607 + elt.forget(aReturn);
1.2608 + return NS_OK;
1.2609 +}
1.2610 +
1.2611 +nsresult
1.2612 +nsINode::QuerySelectorAll(const nsAString& aSelector, nsIDOMNodeList **aReturn)
1.2613 +{
1.2614 + ErrorResult rv;
1.2615 + *aReturn = nsINode::QuerySelectorAll(aSelector, rv).take();
1.2616 + return rv.ErrorCode();
1.2617 +}
1.2618 +
1.2619 +Element*
1.2620 +nsINode::GetElementById(const nsAString& aId)
1.2621 +{
1.2622 + MOZ_ASSERT(IsElement() || IsNodeOfType(eDOCUMENT_FRAGMENT),
1.2623 + "Bogus this object for GetElementById call");
1.2624 + if (IsInDoc()) {
1.2625 + ElementHolder holder;
1.2626 + FindMatchingElementsWithId<true>(aId, this, nullptr, holder);
1.2627 + return holder.mElement;
1.2628 + }
1.2629 +
1.2630 + for (nsIContent* kid = GetFirstChild(); kid; kid = kid->GetNextNode(this)) {
1.2631 + if (!kid->IsElement()) {
1.2632 + continue;
1.2633 + }
1.2634 + nsIAtom* id = kid->AsElement()->GetID();
1.2635 + if (id && id->Equals(aId)) {
1.2636 + return kid->AsElement();
1.2637 + }
1.2638 + }
1.2639 + return nullptr;
1.2640 +}
1.2641 +
1.2642 +JSObject*
1.2643 +nsINode::WrapObject(JSContext *aCx)
1.2644 +{
1.2645 + MOZ_ASSERT(IsDOMBinding());
1.2646 +
1.2647 + // Make sure one of these is true
1.2648 + // (1) our owner document has a script handling object,
1.2649 + // (2) Our owner document has had a script handling object, or has been marked
1.2650 + // to have had one,
1.2651 + // (3) we are running a privileged script.
1.2652 + // Event handling is possible only if (1). If (2) event handling is
1.2653 + // prevented.
1.2654 + // If the document has never had a script handling object, untrusted
1.2655 + // scripts (3) shouldn't touch it!
1.2656 + bool hasHadScriptHandlingObject = false;
1.2657 + if (!OwnerDoc()->GetScriptHandlingObject(hasHadScriptHandlingObject) &&
1.2658 + !hasHadScriptHandlingObject &&
1.2659 + !nsContentUtils::IsCallerChrome()) {
1.2660 + Throw(aCx, NS_ERROR_UNEXPECTED);
1.2661 + return nullptr;
1.2662 + }
1.2663 +
1.2664 + JS::Rooted<JSObject*> obj(aCx, WrapNode(aCx));
1.2665 + MOZ_ASSERT_IF(ChromeOnlyAccess(),
1.2666 + xpc::IsInXBLScope(obj) || !xpc::UseXBLScope(js::GetObjectCompartment(obj)));
1.2667 + return obj;
1.2668 +}
1.2669 +
1.2670 +already_AddRefed<nsINode>
1.2671 +nsINode::CloneNode(bool aDeep, ErrorResult& aError)
1.2672 +{
1.2673 + bool callUserDataHandlers = NodeType() != nsIDOMNode::DOCUMENT_NODE ||
1.2674 + !static_cast<nsIDocument*>(this)->CreatingStaticClone();
1.2675 +
1.2676 + nsCOMPtr<nsINode> result;
1.2677 + aError = nsNodeUtils::CloneNodeImpl(this, aDeep, callUserDataHandlers,
1.2678 + getter_AddRefs(result));
1.2679 + return result.forget();
1.2680 +}
1.2681 +
1.2682 +nsDOMAttributeMap*
1.2683 +nsINode::GetAttributes()
1.2684 +{
1.2685 + if (!IsElement()) {
1.2686 + return nullptr;
1.2687 + }
1.2688 + return AsElement()->Attributes();
1.2689 +}
1.2690 +
1.2691 +bool
1.2692 +EventTarget::DispatchEvent(Event& aEvent,
1.2693 + ErrorResult& aRv)
1.2694 +{
1.2695 + bool result = false;
1.2696 + aRv = DispatchEvent(&aEvent, &result);
1.2697 + return result;
1.2698 +}
