forked from mirrors/gecko-dev
628 lines
25 KiB
C++
628 lines
25 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsNodeUtils.h"
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#include "nsContentUtils.h"
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#include "nsCSSPseudoElements.h"
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#include "nsINode.h"
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#include "nsIContent.h"
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#include "nsIContentInlines.h"
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#include "mozilla/dom/Document.h"
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#include "mozilla/dom/Element.h"
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#include "nsIMutationObserver.h"
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#include "mozilla/EventListenerManager.h"
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#include "nsIXPConnect.h"
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#include "PLDHashTable.h"
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#include "nsCOMArray.h"
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#include "nsPIDOMWindow.h"
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#ifdef MOZ_XUL
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# include "nsXULElement.h"
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#endif
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#include "nsBindingManager.h"
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#include "nsGenericHTMLElement.h"
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#include "mozilla/AnimationTarget.h"
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#include "mozilla/Assertions.h"
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#include "mozilla/ErrorResult.h"
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#include "mozilla/dom/Animation.h"
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#include "mozilla/dom/HTMLImageElement.h"
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#include "mozilla/dom/HTMLMediaElement.h"
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#include "mozilla/dom/KeyframeEffect.h"
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#include "nsWrapperCacheInlines.h"
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#include "nsObjectLoadingContent.h"
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#include "nsDOMMutationObserver.h"
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#include "mozilla/dom/BindingUtils.h"
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#include "mozilla/dom/CustomElementRegistry.h"
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#include "mozilla/dom/HTMLTemplateElement.h"
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#include "mozilla/dom/ShadowRoot.h"
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using namespace mozilla;
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using namespace mozilla::dom;
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using mozilla::AutoJSContext;
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enum class IsRemoveNotification {
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Yes,
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No,
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};
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#ifdef DEBUG
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# define COMPOSED_DOC_DECL \
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const bool wasInComposedDoc = !!node->GetComposedDoc();
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#else
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# define COMPOSED_DOC_DECL
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#endif
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// This macro expects the ownerDocument of content_ to be in scope as
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// |Document* doc|
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#define IMPL_MUTATION_NOTIFICATION(func_, content_, params_, remove_) \
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PR_BEGIN_MACRO \
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bool needsEnterLeave = doc->MayHaveDOMMutationObservers(); \
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if (needsEnterLeave) { \
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nsDOMMutationObserver::EnterMutationHandling(); \
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} \
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nsINode* node = content_; \
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COMPOSED_DOC_DECL \
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NS_ASSERTION(node->OwnerDoc() == doc, "Bogus document"); \
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if (remove_ == IsRemoveNotification::Yes && node->GetComposedDoc()) { \
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if (nsIPresShell* shell = doc->GetObservingShell()) { \
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shell->func_ params_; \
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} \
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} \
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doc->BindingManager()->func_ params_; \
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nsINode* last; \
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do { \
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nsINode::nsSlots* slots = node->GetExistingSlots(); \
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if (slots && !slots->mMutationObservers.IsEmpty()) { \
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NS_OBSERVER_AUTO_ARRAY_NOTIFY_OBSERVERS( \
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slots->mMutationObservers, nsIMutationObserver, 1, func_, params_); \
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} \
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last = node; \
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if (ShadowRoot* shadow = ShadowRoot::FromNode(node)) { \
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node = shadow->GetHost(); \
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} else { \
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node = node->GetParentNode(); \
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} \
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} while (node); \
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/* Whitelist NativeAnonymousChildListChange removal notifications from \
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* the assertion since it runs from UnbindFromTree, and thus we don't \
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* reach the document, but doesn't matter. */ \
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MOZ_ASSERT((last == doc) == wasInComposedDoc || \
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(remove_ == IsRemoveNotification::Yes && \
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!strcmp(#func_, "NativeAnonymousChildListChange"))); \
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if (remove_ == IsRemoveNotification::No && last == doc) { \
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if (nsIPresShell* shell = doc->GetObservingShell()) { \
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shell->func_ params_; \
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} \
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} \
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if (needsEnterLeave) { \
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nsDOMMutationObserver::LeaveMutationHandling(); \
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} \
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PR_END_MACRO
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#define IMPL_ANIMATION_NOTIFICATION(func_, content_, params_) \
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PR_BEGIN_MACRO \
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bool needsEnterLeave = doc->MayHaveDOMMutationObservers(); \
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if (needsEnterLeave) { \
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nsDOMMutationObserver::EnterMutationHandling(); \
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} \
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nsINode* node = content_; \
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do { \
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nsINode::nsSlots* slots = node->GetExistingSlots(); \
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if (slots && !slots->mMutationObservers.IsEmpty()) { \
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NS_OBSERVER_AUTO_ARRAY_NOTIFY_OBSERVERS_WITH_QI( \
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slots->mMutationObservers, nsIMutationObserver, 1, \
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nsIAnimationObserver, func_, params_); \
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} \
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if (ShadowRoot* shadow = ShadowRoot::FromNode(node)) { \
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node = shadow->GetHost(); \
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} else { \
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node = node->GetParentNode(); \
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} \
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} while (node); \
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if (needsEnterLeave) { \
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nsDOMMutationObserver::LeaveMutationHandling(); \
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} \
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PR_END_MACRO
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void nsNodeUtils::CharacterDataWillChange(
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nsIContent* aContent, const CharacterDataChangeInfo& aInfo) {
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Document* doc = aContent->OwnerDoc();
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IMPL_MUTATION_NOTIFICATION(CharacterDataWillChange, aContent,
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(aContent, aInfo), IsRemoveNotification::No);
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}
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void nsNodeUtils::CharacterDataChanged(nsIContent* aContent,
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const CharacterDataChangeInfo& aInfo) {
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Document* doc = aContent->OwnerDoc();
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IMPL_MUTATION_NOTIFICATION(CharacterDataChanged, aContent, (aContent, aInfo),
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IsRemoveNotification::No);
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}
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void nsNodeUtils::AttributeWillChange(Element* aElement, int32_t aNameSpaceID,
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nsAtom* aAttribute, int32_t aModType) {
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Document* doc = aElement->OwnerDoc();
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IMPL_MUTATION_NOTIFICATION(AttributeWillChange, aElement,
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(aElement, aNameSpaceID, aAttribute, aModType),
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IsRemoveNotification::No);
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}
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void nsNodeUtils::AttributeChanged(Element* aElement, int32_t aNameSpaceID,
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nsAtom* aAttribute, int32_t aModType,
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const nsAttrValue* aOldValue) {
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Document* doc = aElement->OwnerDoc();
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IMPL_MUTATION_NOTIFICATION(
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AttributeChanged, aElement,
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(aElement, aNameSpaceID, aAttribute, aModType, aOldValue),
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IsRemoveNotification::No);
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}
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void nsNodeUtils::AttributeSetToCurrentValue(Element* aElement,
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int32_t aNameSpaceID,
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nsAtom* aAttribute) {
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Document* doc = aElement->OwnerDoc();
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IMPL_MUTATION_NOTIFICATION(AttributeSetToCurrentValue, aElement,
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(aElement, aNameSpaceID, aAttribute),
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IsRemoveNotification::No);
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}
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void nsNodeUtils::ContentAppended(nsIContent* aContainer,
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nsIContent* aFirstNewContent) {
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Document* doc = aContainer->OwnerDoc();
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IMPL_MUTATION_NOTIFICATION(ContentAppended, aContainer, (aFirstNewContent),
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IsRemoveNotification::No);
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}
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void nsNodeUtils::NativeAnonymousChildListChange(nsIContent* aContent,
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bool aIsRemove) {
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Document* doc = aContent->OwnerDoc();
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auto isRemove =
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aIsRemove ? IsRemoveNotification::Yes : IsRemoveNotification::No;
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IMPL_MUTATION_NOTIFICATION(NativeAnonymousChildListChange, aContent,
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(aContent, aIsRemove), isRemove);
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}
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void nsNodeUtils::ContentInserted(nsINode* aContainer, nsIContent* aChild) {
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MOZ_ASSERT(aContainer->IsContent() || aContainer->IsDocument(),
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"container must be an nsIContent or an Document");
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Document* doc = aContainer->OwnerDoc();
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IMPL_MUTATION_NOTIFICATION(ContentInserted, aContainer, (aChild),
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IsRemoveNotification::No);
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}
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void nsNodeUtils::ContentRemoved(nsINode* aContainer, nsIContent* aChild,
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nsIContent* aPreviousSibling) {
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MOZ_ASSERT(aContainer->IsContent() || aContainer->IsDocument(),
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"container must be an nsIContent or an Document");
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Document* doc = aContainer->OwnerDoc();
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MOZ_ASSERT(aChild->GetParentNode() == aContainer,
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"We expect the parent link to be still around at this point");
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IMPL_MUTATION_NOTIFICATION(ContentRemoved, aContainer,
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(aChild, aPreviousSibling),
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IsRemoveNotification::Yes);
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}
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Maybe<NonOwningAnimationTarget> nsNodeUtils::GetTargetForAnimation(
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const Animation* aAnimation) {
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AnimationEffect* effect = aAnimation->GetEffect();
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if (!effect || !effect->AsKeyframeEffect()) {
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return Nothing();
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}
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return effect->AsKeyframeEffect()->GetTarget();
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}
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void nsNodeUtils::AnimationMutated(Animation* aAnimation,
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AnimationMutationType aMutatedType) {
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Maybe<NonOwningAnimationTarget> target = GetTargetForAnimation(aAnimation);
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if (!target) {
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return;
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}
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// A pseudo element and its parent element use the same owner doc.
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Document* doc = target->mElement->OwnerDoc();
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if (doc->MayHaveAnimationObservers()) {
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// we use the its parent element as the subject in DOM Mutation Observer.
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Element* elem = target->mElement;
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switch (aMutatedType) {
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case AnimationMutationType::Added:
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IMPL_ANIMATION_NOTIFICATION(AnimationAdded, elem, (aAnimation));
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break;
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case AnimationMutationType::Changed:
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IMPL_ANIMATION_NOTIFICATION(AnimationChanged, elem, (aAnimation));
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break;
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case AnimationMutationType::Removed:
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IMPL_ANIMATION_NOTIFICATION(AnimationRemoved, elem, (aAnimation));
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break;
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default:
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MOZ_ASSERT_UNREACHABLE("unexpected mutation type");
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}
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}
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}
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void nsNodeUtils::AnimationAdded(Animation* aAnimation) {
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AnimationMutated(aAnimation, AnimationMutationType::Added);
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}
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void nsNodeUtils::AnimationChanged(Animation* aAnimation) {
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AnimationMutated(aAnimation, AnimationMutationType::Changed);
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}
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void nsNodeUtils::AnimationRemoved(Animation* aAnimation) {
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AnimationMutated(aAnimation, AnimationMutationType::Removed);
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}
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void nsNodeUtils::LastRelease(nsINode* aNode) {
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nsINode::nsSlots* slots = aNode->GetExistingSlots();
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if (slots) {
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if (!slots->mMutationObservers.IsEmpty()) {
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NS_OBSERVER_AUTO_ARRAY_NOTIFY_OBSERVERS(slots->mMutationObservers,
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nsIMutationObserver, 1,
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NodeWillBeDestroyed, (aNode));
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}
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delete slots;
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aNode->mSlots = nullptr;
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}
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// Kill properties first since that may run external code, so we want to
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// be in as complete state as possible at that time.
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if (aNode->IsDocument()) {
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// Delete all properties before tearing down the document. Some of the
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// properties are bound to nsINode objects and the destructor functions of
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// the properties may want to use the owner document of the nsINode.
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aNode->AsDocument()->DeleteAllProperties();
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} else {
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if (aNode->HasProperties()) {
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// Strong reference to the document so that deleting properties can't
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// delete the document.
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nsCOMPtr<Document> document = aNode->OwnerDoc();
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document->DeleteAllPropertiesFor(aNode);
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}
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// I wonder whether it's faster to do the HasFlag check first....
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if (aNode->IsNodeOfType(nsINode::eHTML_FORM_CONTROL) &&
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aNode->HasFlag(ADDED_TO_FORM)) {
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// Tell the form (if any) this node is going away. Don't
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// notify, since we're being destroyed in any case.
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static_cast<nsGenericHTMLFormElement*>(aNode)->ClearForm(true, true);
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}
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if (aNode->IsHTMLElement(nsGkAtoms::img) && aNode->HasFlag(ADDED_TO_FORM)) {
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HTMLImageElement* imageElem = static_cast<HTMLImageElement*>(aNode);
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imageElem->ClearForm(true);
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}
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}
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aNode->UnsetFlags(NODE_HAS_PROPERTIES);
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if (aNode->NodeType() != nsINode::DOCUMENT_NODE &&
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aNode->HasFlag(NODE_HAS_LISTENERMANAGER)) {
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#ifdef DEBUG
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if (nsContentUtils::IsInitialized()) {
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EventListenerManager* manager =
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nsContentUtils::GetExistingListenerManagerForNode(aNode);
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if (!manager) {
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NS_ERROR(
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"Huh, our bit says we have a listener manager list, "
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"but there's nothing in the hash!?!!");
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}
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}
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#endif
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nsContentUtils::RemoveListenerManager(aNode);
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aNode->UnsetFlags(NODE_HAS_LISTENERMANAGER);
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}
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if (Element* element = Element::FromNode(aNode)) {
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element->OwnerDoc()->ClearBoxObjectFor(element);
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NS_ASSERTION(!element->GetXBLBinding(), "Node has binding on destruction");
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}
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aNode->ReleaseWrapper(aNode);
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FragmentOrElement::RemoveBlackMarkedNode(aNode);
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}
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/* static */
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already_AddRefed<nsINode> nsNodeUtils::CloneNodeImpl(nsINode* aNode, bool aDeep,
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ErrorResult& aError) {
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return Clone(aNode, aDeep, nullptr, nullptr, aError);
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}
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/* static */
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already_AddRefed<nsINode> nsNodeUtils::CloneAndAdopt(
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nsINode* aNode, bool aClone, bool aDeep,
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nsNodeInfoManager* aNewNodeInfoManager,
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JS::Handle<JSObject*> aReparentScope,
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nsCOMArray<nsINode>* aNodesWithProperties, nsINode* aParent,
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ErrorResult& aError) {
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MOZ_ASSERT((!aClone && aNewNodeInfoManager) || !aReparentScope,
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"If cloning or not getting a new nodeinfo we shouldn't rewrap");
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MOZ_ASSERT(!aParent || aNode->IsContent(),
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"Can't insert document or attribute nodes into a parent");
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// First deal with aNode and walk its attributes (and their children). Then,
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// if aDeep is true, deal with aNode's children (and recurse into their
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// attributes and children).
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nsAutoScriptBlocker scriptBlocker;
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nsNodeInfoManager* nodeInfoManager = aNewNodeInfoManager;
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// aNode.
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NodeInfo* nodeInfo = aNode->mNodeInfo;
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RefPtr<NodeInfo> newNodeInfo;
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if (nodeInfoManager) {
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// Don't allow importing/adopting nodes from non-privileged "scriptable"
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// documents to "non-scriptable" documents.
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Document* newDoc = nodeInfoManager->GetDocument();
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if (NS_WARN_IF(!newDoc)) {
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aError.Throw(NS_ERROR_UNEXPECTED);
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return nullptr;
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}
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bool hasHadScriptHandlingObject = false;
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if (!newDoc->GetScriptHandlingObject(hasHadScriptHandlingObject) &&
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!hasHadScriptHandlingObject) {
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Document* currentDoc = aNode->OwnerDoc();
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if (NS_WARN_IF(!nsContentUtils::IsChromeDoc(currentDoc) &&
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(currentDoc->GetScriptHandlingObject(
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hasHadScriptHandlingObject) ||
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hasHadScriptHandlingObject))) {
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aError.Throw(NS_ERROR_UNEXPECTED);
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return nullptr;
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}
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}
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newNodeInfo = nodeInfoManager->GetNodeInfo(
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nodeInfo->NameAtom(), nodeInfo->GetPrefixAtom(),
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nodeInfo->NamespaceID(), nodeInfo->NodeType(),
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nodeInfo->GetExtraName());
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nodeInfo = newNodeInfo;
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}
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Element* elem = Element::FromNode(aNode);
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nsCOMPtr<nsINode> clone;
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if (aClone) {
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nsresult rv = aNode->Clone(nodeInfo, getter_AddRefs(clone));
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if (NS_WARN_IF(NS_FAILED(rv))) {
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aError.Throw(rv);
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return nullptr;
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}
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if (clone->IsHTMLElement() || clone->IsXULElement()) {
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// The cloned node may be a custom element that may require
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// enqueing upgrade reaction.
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Element* cloneElem = clone->AsElement();
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CustomElementData* data = elem->GetCustomElementData();
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RefPtr<nsAtom> typeAtom = data ? data->GetCustomElementType() : nullptr;
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if (typeAtom) {
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cloneElem->SetCustomElementData(new CustomElementData(typeAtom));
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MOZ_ASSERT(nodeInfo->NameAtom()->Equals(nodeInfo->LocalName()));
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CustomElementDefinition* definition =
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nsContentUtils::LookupCustomElementDefinition(
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nodeInfo->GetDocument(), nodeInfo->NameAtom(),
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nodeInfo->NamespaceID(), typeAtom);
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if (definition) {
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nsContentUtils::EnqueueUpgradeReaction(cloneElem, definition);
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}
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}
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}
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if (aParent) {
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// If we're cloning we need to insert the cloned children into the cloned
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// parent.
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rv = aParent->AppendChildTo(static_cast<nsIContent*>(clone.get()), false);
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if (NS_WARN_IF(NS_FAILED(rv))) {
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aError.Throw(rv);
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return nullptr;
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}
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} else if (aDeep && clone->IsDocument()) {
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// After cloning the document itself, we want to clone the children into
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// the cloned document (somewhat like cloning and importing them into the
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// cloned document).
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nodeInfoManager = clone->mNodeInfo->NodeInfoManager();
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}
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} else if (nodeInfoManager) {
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Document* oldDoc = aNode->OwnerDoc();
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bool wasRegistered = false;
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if (elem) {
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oldDoc->ClearBoxObjectFor(elem);
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wasRegistered = oldDoc->UnregisterActivityObserver(elem);
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}
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aNode->mNodeInfo.swap(newNodeInfo);
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if (elem) {
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elem->NodeInfoChanged(oldDoc);
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}
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Document* newDoc = aNode->OwnerDoc();
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if (newDoc) {
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if (elem) {
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// Adopted callback must be enqueued whenever a node’s
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// shadow-including inclusive descendants that is custom.
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CustomElementData* data = elem->GetCustomElementData();
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if (data && data->mState == CustomElementData::State::eCustom) {
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LifecycleAdoptedCallbackArgs args = {oldDoc, newDoc};
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nsContentUtils::EnqueueLifecycleCallback(Document::eAdopted, elem,
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nullptr, &args);
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}
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}
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// XXX what if oldDoc is null, we don't know if this should be
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// registered or not! Can that really happen?
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if (wasRegistered) {
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newDoc->RegisterActivityObserver(aNode->AsElement());
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}
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if (nsPIDOMWindowInner* window = newDoc->GetInnerWindow()) {
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EventListenerManager* elm = aNode->GetExistingListenerManager();
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if (elm) {
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window->SetMutationListeners(elm->MutationListenerBits());
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if (elm->MayHavePaintEventListener()) {
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window->SetHasPaintEventListeners();
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}
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if (elm->MayHaveTouchEventListener()) {
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window->SetHasTouchEventListeners();
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}
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if (elm->MayHaveMouseEnterLeaveEventListener()) {
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window->SetHasMouseEnterLeaveEventListeners();
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}
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if (elm->MayHavePointerEnterLeaveEventListener()) {
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window->SetHasPointerEnterLeaveEventListeners();
|
||
}
|
||
if (elm->MayHaveSelectionChangeEventListener()) {
|
||
window->SetHasSelectionChangeEventListeners();
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
if (wasRegistered && oldDoc != newDoc) {
|
||
nsIContent* content = aNode->AsContent();
|
||
if (auto mediaElem = HTMLMediaElement::FromNodeOrNull(content)) {
|
||
mediaElem->NotifyOwnerDocumentActivityChanged();
|
||
}
|
||
nsCOMPtr<nsIObjectLoadingContent> objectLoadingContent(
|
||
do_QueryInterface(aNode));
|
||
if (objectLoadingContent) {
|
||
nsObjectLoadingContent* olc =
|
||
static_cast<nsObjectLoadingContent*>(objectLoadingContent.get());
|
||
olc->NotifyOwnerDocumentActivityChanged();
|
||
}
|
||
}
|
||
|
||
if (oldDoc != newDoc && oldDoc->MayHaveDOMMutationObservers()) {
|
||
newDoc->SetMayHaveDOMMutationObservers();
|
||
}
|
||
|
||
if (oldDoc != newDoc && oldDoc->MayHaveAnimationObservers()) {
|
||
newDoc->SetMayHaveAnimationObservers();
|
||
}
|
||
|
||
if (elem) {
|
||
elem->RecompileScriptEventListeners();
|
||
}
|
||
|
||
if (aReparentScope) {
|
||
AutoJSContext cx;
|
||
JS::Rooted<JSObject*> wrapper(cx);
|
||
if ((wrapper = aNode->GetWrapper())) {
|
||
MOZ_ASSERT(IsDOMObject(wrapper));
|
||
JSAutoRealm ar(cx, wrapper);
|
||
UpdateReflectorGlobal(cx, wrapper, aError);
|
||
if (aError.Failed()) {
|
||
if (wasRegistered) {
|
||
aNode->OwnerDoc()->UnregisterActivityObserver(aNode->AsElement());
|
||
}
|
||
aNode->mNodeInfo.swap(newNodeInfo);
|
||
if (elem) {
|
||
elem->NodeInfoChanged(newDoc);
|
||
}
|
||
if (wasRegistered) {
|
||
aNode->OwnerDoc()->RegisterActivityObserver(aNode->AsElement());
|
||
}
|
||
return nullptr;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
if (aNodesWithProperties && aNode->HasProperties()) {
|
||
bool ok = aNodesWithProperties->AppendObject(aNode);
|
||
MOZ_RELEASE_ASSERT(ok, "Out of memory");
|
||
if (aClone) {
|
||
ok = aNodesWithProperties->AppendObject(clone);
|
||
MOZ_RELEASE_ASSERT(ok, "Out of memory");
|
||
}
|
||
}
|
||
|
||
if (aDeep && (!aClone || !aNode->IsAttr())) {
|
||
// aNode's children.
|
||
for (nsIContent* cloneChild = aNode->GetFirstChild(); cloneChild;
|
||
cloneChild = cloneChild->GetNextSibling()) {
|
||
nsCOMPtr<nsINode> child =
|
||
CloneAndAdopt(cloneChild, aClone, true, nodeInfoManager,
|
||
aReparentScope, aNodesWithProperties, clone, aError);
|
||
if (NS_WARN_IF(aError.Failed())) {
|
||
return nullptr;
|
||
}
|
||
}
|
||
}
|
||
|
||
if (aDeep && aNode->IsElement()) {
|
||
if (aClone) {
|
||
if (clone->OwnerDoc()->IsStaticDocument()) {
|
||
ShadowRoot* originalShadowRoot = aNode->AsElement()->GetShadowRoot();
|
||
if (originalShadowRoot) {
|
||
RefPtr<ShadowRoot> newShadowRoot =
|
||
clone->AsElement()->AttachShadowWithoutNameChecks(
|
||
originalShadowRoot->Mode());
|
||
|
||
newShadowRoot->CloneInternalDataFrom(originalShadowRoot);
|
||
for (nsIContent* origChild = originalShadowRoot->GetFirstChild();
|
||
origChild; origChild = origChild->GetNextSibling()) {
|
||
nsCOMPtr<nsINode> child = CloneAndAdopt(
|
||
origChild, aClone, aDeep, nodeInfoManager, aReparentScope,
|
||
aNodesWithProperties, newShadowRoot, aError);
|
||
if (NS_WARN_IF(aError.Failed())) {
|
||
return nullptr;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
} else {
|
||
if (ShadowRoot* shadowRoot = aNode->AsElement()->GetShadowRoot()) {
|
||
nsCOMPtr<nsINode> child =
|
||
CloneAndAdopt(shadowRoot, aClone, aDeep, nodeInfoManager,
|
||
aReparentScope, aNodesWithProperties, clone, aError);
|
||
if (NS_WARN_IF(aError.Failed())) {
|
||
return nullptr;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
// Cloning template element.
|
||
if (aDeep && aClone && IsTemplateElement(aNode)) {
|
||
DocumentFragment* origContent =
|
||
static_cast<HTMLTemplateElement*>(aNode)->Content();
|
||
DocumentFragment* cloneContent =
|
||
static_cast<HTMLTemplateElement*>(clone.get())->Content();
|
||
|
||
// Clone the children into the clone's template content owner
|
||
// document's nodeinfo manager.
|
||
nsNodeInfoManager* ownerNodeInfoManager =
|
||
cloneContent->mNodeInfo->NodeInfoManager();
|
||
|
||
for (nsIContent* cloneChild = origContent->GetFirstChild(); cloneChild;
|
||
cloneChild = cloneChild->GetNextSibling()) {
|
||
nsCOMPtr<nsINode> child = CloneAndAdopt(
|
||
cloneChild, aClone, aDeep, ownerNodeInfoManager, aReparentScope,
|
||
aNodesWithProperties, cloneContent, aError);
|
||
if (NS_WARN_IF(aError.Failed())) {
|
||
return nullptr;
|
||
}
|
||
}
|
||
}
|
||
|
||
return clone.forget();
|
||
}
|
||
|
||
bool nsNodeUtils::IsTemplateElement(const nsINode* aNode) {
|
||
return aNode->IsHTMLElement(nsGkAtoms::_template);
|
||
}
|
||
|
||
nsIContent* nsNodeUtils::GetFirstChildOfTemplateOrNode(nsINode* aNode) {
|
||
if (nsNodeUtils::IsTemplateElement(aNode)) {
|
||
DocumentFragment* frag =
|
||
static_cast<HTMLTemplateElement*>(aNode)->Content();
|
||
return frag->GetFirstChild();
|
||
}
|
||
|
||
return aNode->GetFirstChild();
|
||
}
|