mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-02 15:15:23 +00:00
1176 lines
36 KiB
C++
1176 lines
36 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 file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsDOMMutationObserver.h"
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#include "mozilla/AnimationTarget.h"
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#include "mozilla/Maybe.h"
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#include "mozilla/OwningNonNull.h"
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#include "mozilla/dom/Animation.h"
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#include "mozilla/dom/KeyframeEffectReadOnly.h"
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#include "nsContentUtils.h"
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#include "nsCSSPseudoElements.h"
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#include "nsError.h"
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#include "nsIDOMMutationEvent.h"
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#include "nsIScriptGlobalObject.h"
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#include "nsServiceManagerUtils.h"
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#include "nsTextFragment.h"
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#include "nsThreadUtils.h"
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using mozilla::Maybe;
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using mozilla::Move;
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using mozilla::NonOwningAnimationTarget;
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using mozilla::dom::TreeOrderComparator;
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using mozilla::dom::Animation;
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using mozilla::dom::Element;
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AutoTArray<RefPtr<nsDOMMutationObserver>, 4>*
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nsDOMMutationObserver::sScheduledMutationObservers = nullptr;
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nsDOMMutationObserver* nsDOMMutationObserver::sCurrentObserver = nullptr;
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uint32_t nsDOMMutationObserver::sMutationLevel = 0;
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uint64_t nsDOMMutationObserver::sCount = 0;
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AutoTArray<AutoTArray<RefPtr<nsDOMMutationObserver>, 4>, 4>*
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nsDOMMutationObserver::sCurrentlyHandlingObservers = nullptr;
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nsINodeList*
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nsDOMMutationRecord::AddedNodes()
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{
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if (!mAddedNodes) {
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mAddedNodes = new nsSimpleContentList(mTarget);
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}
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return mAddedNodes;
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}
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nsINodeList*
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nsDOMMutationRecord::RemovedNodes()
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{
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if (!mRemovedNodes) {
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mRemovedNodes = new nsSimpleContentList(mTarget);
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}
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return mRemovedNodes;
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}
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsDOMMutationRecord)
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NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
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NS_INTERFACE_MAP_ENTRY(nsISupports)
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NS_INTERFACE_MAP_END
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NS_IMPL_CYCLE_COLLECTING_ADDREF(nsDOMMutationRecord)
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NS_IMPL_CYCLE_COLLECTING_RELEASE(nsDOMMutationRecord)
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NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(nsDOMMutationRecord,
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mTarget,
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mPreviousSibling, mNextSibling,
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mAddedNodes, mRemovedNodes,
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mAddedAnimations, mRemovedAnimations,
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mChangedAnimations,
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mNext, mOwner)
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// Observer
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bool
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nsMutationReceiverBase::IsObservable(nsIContent* aContent)
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{
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return !aContent->ChromeOnlyAccess() &&
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(Observer()->IsChrome() || !aContent->IsInAnonymousSubtree());
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}
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NS_IMPL_ADDREF(nsMutationReceiver)
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NS_IMPL_RELEASE(nsMutationReceiver)
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NS_INTERFACE_MAP_BEGIN(nsMutationReceiver)
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NS_INTERFACE_MAP_ENTRY(nsISupports)
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NS_INTERFACE_MAP_ENTRY(nsIMutationObserver)
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NS_INTERFACE_MAP_END
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nsMutationReceiver::nsMutationReceiver(nsINode* aTarget,
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nsDOMMutationObserver* aObserver)
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: nsMutationReceiverBase(aTarget, aObserver)
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{
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mTarget->BindObject(aObserver);
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}
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void
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nsMutationReceiver::Disconnect(bool aRemoveFromObserver)
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{
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if (mRegisterTarget) {
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mRegisterTarget->RemoveMutationObserver(this);
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mRegisterTarget = nullptr;
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}
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mParent = nullptr;
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nsINode* target = mTarget;
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mTarget = nullptr;
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nsDOMMutationObserver* observer = mObserver;
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mObserver = nullptr;
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RemoveClones();
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if (target && observer) {
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if (aRemoveFromObserver) {
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static_cast<nsDOMMutationObserver*>(observer)->RemoveReceiver(this);
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}
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// UnbindObject may delete 'this'!
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target->UnbindObject(observer);
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}
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}
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void
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nsMutationReceiver::NativeAnonymousChildListChange(nsIDocument* aDocument,
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nsIContent* aContent,
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bool aIsRemove) {
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if (!NativeAnonymousChildList()) {
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return;
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}
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nsINode* parent = aContent->GetParentNode();
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if (!parent ||
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(!Subtree() && Target() != parent) ||
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(Subtree() && RegisterTarget()->SubtreeRoot() != parent->SubtreeRoot())) {
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return;
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}
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nsDOMMutationRecord* m =
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Observer()->CurrentRecord(nsGkAtoms::nativeAnonymousChildList);
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if (m->mTarget) {
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return;
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}
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m->mTarget = parent;
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if (aIsRemove) {
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m->mRemovedNodes = new nsSimpleContentList(parent);
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m->mRemovedNodes->AppendElement(aContent);
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} else {
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m->mAddedNodes = new nsSimpleContentList(parent);
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m->mAddedNodes->AppendElement(aContent);
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}
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}
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void
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nsMutationReceiver::AttributeWillChange(nsIDocument* aDocument,
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mozilla::dom::Element* aElement,
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int32_t aNameSpaceID,
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nsIAtom* aAttribute,
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int32_t aModType,
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const nsAttrValue* aNewValue)
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{
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if (nsAutoMutationBatch::IsBatching() ||
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!ObservesAttr(RegisterTarget(), aElement, aNameSpaceID, aAttribute)) {
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return;
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}
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nsDOMMutationRecord* m =
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Observer()->CurrentRecord(nsGkAtoms::attributes);
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NS_ASSERTION(!m->mTarget || m->mTarget == aElement,
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"Wrong target!");
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NS_ASSERTION(!m->mAttrName || m->mAttrName == aAttribute,
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"Wrong attribute!");
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if (!m->mTarget) {
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m->mTarget = aElement;
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m->mAttrName = aAttribute;
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if (aNameSpaceID == kNameSpaceID_None) {
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m->mAttrNamespace.SetIsVoid(true);
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} else {
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nsContentUtils::NameSpaceManager()->GetNameSpaceURI(aNameSpaceID,
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m->mAttrNamespace);
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}
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}
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if (AttributeOldValue() && m->mPrevValue.IsVoid()) {
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if (!aElement->GetAttr(aNameSpaceID, aAttribute, m->mPrevValue)) {
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m->mPrevValue.SetIsVoid(true);
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}
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}
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}
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void
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nsMutationReceiver::CharacterDataWillChange(nsIDocument *aDocument,
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nsIContent* aContent,
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CharacterDataChangeInfo* aInfo)
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{
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if (nsAutoMutationBatch::IsBatching() ||
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!CharacterData() ||
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(!Subtree() && aContent != Target()) ||
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(Subtree() && RegisterTarget()->SubtreeRoot() != aContent->SubtreeRoot()) ||
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!IsObservable(aContent)) {
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return;
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}
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nsDOMMutationRecord* m =
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Observer()->CurrentRecord(nsGkAtoms::characterData);
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NS_ASSERTION(!m->mTarget || m->mTarget == aContent,
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"Wrong target!");
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if (!m->mTarget) {
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m->mTarget = aContent;
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}
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if (CharacterDataOldValue() && m->mPrevValue.IsVoid()) {
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aContent->GetText()->AppendTo(m->mPrevValue);
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}
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}
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void
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nsMutationReceiver::ContentAppended(nsIDocument* aDocument,
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nsIContent* aContainer,
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nsIContent* aFirstNewContent,
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int32_t aNewIndexInContainer)
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{
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nsINode* parent = NODE_FROM(aContainer, aDocument);
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bool wantsChildList =
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ChildList() &&
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((Subtree() && RegisterTarget()->SubtreeRoot() == parent->SubtreeRoot()) ||
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parent == Target());
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if (!wantsChildList || !IsObservable(aFirstNewContent)) {
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return;
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}
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if (nsAutoMutationBatch::IsBatching()) {
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if (parent == nsAutoMutationBatch::GetBatchTarget()) {
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nsAutoMutationBatch::UpdateObserver(Observer(), wantsChildList);
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}
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return;
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}
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nsDOMMutationRecord* m =
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Observer()->CurrentRecord(nsGkAtoms::childList);
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NS_ASSERTION(!m->mTarget || m->mTarget == parent,
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"Wrong target!");
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if (m->mTarget) {
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// Already handled case.
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return;
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}
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m->mTarget = parent;
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m->mAddedNodes = new nsSimpleContentList(parent);
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nsINode* n = aFirstNewContent;
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while (n) {
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m->mAddedNodes->AppendElement(static_cast<nsIContent*>(n));
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n = n->GetNextSibling();
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}
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m->mPreviousSibling = aFirstNewContent->GetPreviousSibling();
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}
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void
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nsMutationReceiver::ContentInserted(nsIDocument* aDocument,
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nsIContent* aContainer,
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nsIContent* aChild,
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int32_t aIndexInContainer)
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{
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nsINode* parent = NODE_FROM(aContainer, aDocument);
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bool wantsChildList =
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ChildList() &&
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((Subtree() && RegisterTarget()->SubtreeRoot() == parent->SubtreeRoot()) ||
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parent == Target());
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if (!wantsChildList || !IsObservable(aChild)) {
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return;
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}
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if (nsAutoMutationBatch::IsBatching()) {
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if (parent == nsAutoMutationBatch::GetBatchTarget()) {
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nsAutoMutationBatch::UpdateObserver(Observer(), wantsChildList);
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}
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return;
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}
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nsDOMMutationRecord* m =
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Observer()->CurrentRecord(nsGkAtoms::childList);
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if (m->mTarget) {
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// Already handled case.
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return;
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}
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m->mTarget = parent;
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m->mAddedNodes = new nsSimpleContentList(parent);
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m->mAddedNodes->AppendElement(aChild);
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m->mPreviousSibling = aChild->GetPreviousSibling();
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m->mNextSibling = aChild->GetNextSibling();
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}
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void
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nsMutationReceiver::ContentRemoved(nsIDocument* aDocument,
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nsIContent* aContainer,
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nsIContent* aChild,
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int32_t aIndexInContainer,
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nsIContent* aPreviousSibling)
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{
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if (!IsObservable(aChild)) {
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return;
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}
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nsINode* parent = NODE_FROM(aContainer, aDocument);
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if (Subtree() && parent->SubtreeRoot() != RegisterTarget()->SubtreeRoot()) {
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return;
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}
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if (nsAutoMutationBatch::IsBatching()) {
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if (nsAutoMutationBatch::IsRemovalDone()) {
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// This can happen for example if HTML parser parses to
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// context node, but needs to move elements around.
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return;
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}
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if (nsAutoMutationBatch::GetBatchTarget() != parent) {
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return;
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}
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bool wantsChildList = ChildList() && (Subtree() || parent == Target());
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if (wantsChildList || Subtree()) {
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nsAutoMutationBatch::NodeRemoved(aChild);
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nsAutoMutationBatch::UpdateObserver(Observer(), wantsChildList);
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}
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return;
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}
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if (Subtree()) {
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// Try to avoid creating transient observer if the node
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// already has an observer observing the same set of nodes.
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nsMutationReceiver* orig = GetParent() ? GetParent() : this;
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if (Observer()->GetReceiverFor(aChild, false, false) != orig) {
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bool transientExists = false;
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nsCOMArray<nsMutationReceiver>* transientReceivers = nullptr;
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Observer()->mTransientReceivers.Get(aChild, &transientReceivers);
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if (!transientReceivers) {
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transientReceivers = new nsCOMArray<nsMutationReceiver>();
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Observer()->mTransientReceivers.Put(aChild, transientReceivers);
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} else {
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for (int32_t i = 0; i < transientReceivers->Count(); ++i) {
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nsMutationReceiver* r = transientReceivers->ObjectAt(i);
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if (r->GetParent() == orig) {
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transientExists = true;
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}
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}
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}
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if (!transientExists) {
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// Make sure the elements which are removed from the
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// subtree are kept in the same observation set.
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nsMutationReceiver* tr;
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if (orig->Animations()) {
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tr = nsAnimationReceiver::Create(aChild, orig);
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} else {
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tr = nsMutationReceiver::Create(aChild, orig);
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}
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transientReceivers->AppendObject(tr);
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}
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}
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}
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if (ChildList() && (Subtree() || parent == Target())) {
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nsDOMMutationRecord* m =
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Observer()->CurrentRecord(nsGkAtoms::childList);
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if (m->mTarget) {
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// Already handled case.
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return;
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}
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m->mTarget = parent;
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m->mRemovedNodes = new nsSimpleContentList(parent);
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m->mRemovedNodes->AppendElement(aChild);
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m->mPreviousSibling = aPreviousSibling;
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m->mNextSibling = parent->GetChildAt(aIndexInContainer);
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}
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// We need to schedule always, so that after microtask mTransientReceivers
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// can be cleared correctly.
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Observer()->ScheduleForRun();
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}
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void nsMutationReceiver::NodeWillBeDestroyed(const nsINode *aNode)
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{
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NS_ASSERTION(!mParent, "Shouldn't have mParent here!");
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Disconnect(true);
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}
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void
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nsAnimationReceiver::RecordAnimationMutation(Animation* aAnimation,
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AnimationMutation aMutationType)
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{
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mozilla::dom::AnimationEffectReadOnly* effect = aAnimation->GetEffect();
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if (!effect) {
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return;
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}
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mozilla::dom::KeyframeEffectReadOnly* keyframeEffect =
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effect->AsKeyframeEffect();
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if (!keyframeEffect) {
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return;
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}
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Maybe<NonOwningAnimationTarget> animationTarget = keyframeEffect->GetTarget();
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if (!animationTarget) {
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return;
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}
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Element* elem = animationTarget->mElement;
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if (!Animations() || !(Subtree() || elem == Target()) ||
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elem->ChromeOnlyAccess()) {
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return;
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}
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// Record animations targeting to a pseudo element only when subtree is true.
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if (animationTarget->mPseudoType != mozilla::CSSPseudoElementType::NotPseudo &&
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!Subtree()) {
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return;
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}
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if (nsAutoAnimationMutationBatch::IsBatching()) {
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switch (aMutationType) {
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case eAnimationMutation_Added:
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nsAutoAnimationMutationBatch::AnimationAdded(aAnimation, elem);
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break;
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case eAnimationMutation_Changed:
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nsAutoAnimationMutationBatch::AnimationChanged(aAnimation, elem);
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break;
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case eAnimationMutation_Removed:
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nsAutoAnimationMutationBatch::AnimationRemoved(aAnimation, elem);
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break;
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}
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nsAutoAnimationMutationBatch::AddObserver(Observer());
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return;
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}
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nsDOMMutationRecord* m =
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Observer()->CurrentRecord(nsGkAtoms::animations);
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NS_ASSERTION(!m->mTarget, "Wrong target!");
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m->mTarget = elem;
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switch (aMutationType) {
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case eAnimationMutation_Added:
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m->mAddedAnimations.AppendElement(aAnimation);
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break;
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case eAnimationMutation_Changed:
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m->mChangedAnimations.AppendElement(aAnimation);
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break;
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case eAnimationMutation_Removed:
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m->mRemovedAnimations.AppendElement(aAnimation);
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break;
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}
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}
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void
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nsAnimationReceiver::AnimationAdded(Animation* aAnimation)
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{
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RecordAnimationMutation(aAnimation, eAnimationMutation_Added);
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}
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void
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nsAnimationReceiver::AnimationChanged(Animation* aAnimation)
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{
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RecordAnimationMutation(aAnimation, eAnimationMutation_Changed);
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}
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void
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nsAnimationReceiver::AnimationRemoved(Animation* aAnimation)
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{
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RecordAnimationMutation(aAnimation, eAnimationMutation_Removed);
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}
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NS_IMPL_ISUPPORTS_INHERITED(nsAnimationReceiver, nsMutationReceiver,
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nsIAnimationObserver)
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// Observer
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsDOMMutationObserver)
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NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
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NS_INTERFACE_MAP_ENTRY(nsISupports)
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NS_INTERFACE_MAP_ENTRY(nsDOMMutationObserver)
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NS_INTERFACE_MAP_END
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NS_IMPL_CYCLE_COLLECTING_ADDREF(nsDOMMutationObserver)
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NS_IMPL_CYCLE_COLLECTING_RELEASE(nsDOMMutationObserver)
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NS_IMPL_CYCLE_COLLECTION_CLASS(nsDOMMutationObserver)
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NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(nsDOMMutationObserver)
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NS_IMPL_CYCLE_COLLECTION_TRACE_PRESERVED_WRAPPER
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NS_IMPL_CYCLE_COLLECTION_TRACE_END
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NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsDOMMutationObserver)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mOwner)
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for (int32_t i = 0; i < tmp->mReceivers.Count(); ++i) {
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tmp->mReceivers[i]->Disconnect(false);
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}
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tmp->mReceivers.Clear();
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tmp->ClearPendingRecords();
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mCallback)
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// No need to handle mTransientReceivers
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NS_IMPL_CYCLE_COLLECTION_UNLINK_END
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(nsDOMMutationObserver)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mOwner)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mReceivers)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mFirstPendingMutation)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mCallback)
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// No need to handle mTransientReceivers
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
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|
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nsMutationReceiver*
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nsDOMMutationObserver::GetReceiverFor(nsINode* aNode, bool aMayCreate,
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bool aWantsAnimations)
|
|
{
|
|
MOZ_ASSERT(aMayCreate || !aWantsAnimations,
|
|
"the value of aWantsAnimations doesn't matter when aMayCreate is "
|
|
"false, so just pass in false for it");
|
|
|
|
if (!aMayCreate && !aNode->MayHaveDOMMutationObserver()) {
|
|
return nullptr;
|
|
}
|
|
|
|
for (int32_t i = 0; i < mReceivers.Count(); ++i) {
|
|
if (mReceivers[i]->Target() == aNode) {
|
|
return mReceivers[i];
|
|
}
|
|
}
|
|
if (!aMayCreate) {
|
|
return nullptr;
|
|
}
|
|
|
|
nsMutationReceiver* r;
|
|
if (aWantsAnimations) {
|
|
r = nsAnimationReceiver::Create(aNode, this);
|
|
} else {
|
|
r = nsMutationReceiver::Create(aNode, this);
|
|
}
|
|
mReceivers.AppendObject(r);
|
|
return r;
|
|
}
|
|
|
|
void
|
|
nsDOMMutationObserver::RemoveReceiver(nsMutationReceiver* aReceiver)
|
|
{
|
|
mReceivers.RemoveObject(aReceiver);
|
|
}
|
|
|
|
void
|
|
nsDOMMutationObserver::GetAllSubtreeObserversFor(nsINode* aNode,
|
|
nsTArray<nsMutationReceiver*>&
|
|
aReceivers)
|
|
{
|
|
nsINode* n = aNode;
|
|
while (n) {
|
|
if (n->MayHaveDOMMutationObserver()) {
|
|
nsMutationReceiver* r = GetReceiverFor(n, false, false);
|
|
if (r && r->Subtree() && !aReceivers.Contains(r)) {
|
|
aReceivers.AppendElement(r);
|
|
// If we've found all the receivers the observer has,
|
|
// no need to search for more.
|
|
if (mReceivers.Count() == int32_t(aReceivers.Length())) {
|
|
return;
|
|
}
|
|
}
|
|
nsCOMArray<nsMutationReceiver>* transientReceivers = nullptr;
|
|
if (mTransientReceivers.Get(n, &transientReceivers) && transientReceivers) {
|
|
for (int32_t i = 0; i < transientReceivers->Count(); ++i) {
|
|
nsMutationReceiver* r = transientReceivers->ObjectAt(i);
|
|
nsMutationReceiver* parent = r->GetParent();
|
|
if (r->Subtree() && parent && !aReceivers.Contains(parent)) {
|
|
aReceivers.AppendElement(parent);
|
|
}
|
|
}
|
|
if (mReceivers.Count() == int32_t(aReceivers.Length())) {
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
n = n->GetParentNode();
|
|
}
|
|
}
|
|
|
|
void
|
|
nsDOMMutationObserver::ScheduleForRun()
|
|
{
|
|
nsDOMMutationObserver::AddCurrentlyHandlingObserver(this, sMutationLevel);
|
|
|
|
if (mWaitingForRun) {
|
|
return;
|
|
}
|
|
mWaitingForRun = true;
|
|
RescheduleForRun();
|
|
}
|
|
|
|
void
|
|
nsDOMMutationObserver::RescheduleForRun()
|
|
{
|
|
if (!sScheduledMutationObservers) {
|
|
sScheduledMutationObservers = new AutoTArray<RefPtr<nsDOMMutationObserver>, 4>;
|
|
}
|
|
|
|
bool didInsert = false;
|
|
for (uint32_t i = 0; i < sScheduledMutationObservers->Length(); ++i) {
|
|
if (static_cast<nsDOMMutationObserver*>((*sScheduledMutationObservers)[i])
|
|
->mId > mId) {
|
|
sScheduledMutationObservers->InsertElementAt(i, this);
|
|
didInsert = true;
|
|
break;
|
|
}
|
|
}
|
|
if (!didInsert) {
|
|
sScheduledMutationObservers->AppendElement(this);
|
|
}
|
|
}
|
|
|
|
void
|
|
nsDOMMutationObserver::Observe(nsINode& aTarget,
|
|
const mozilla::dom::MutationObserverInit& aOptions,
|
|
mozilla::ErrorResult& aRv)
|
|
{
|
|
|
|
bool childList = aOptions.mChildList;
|
|
bool attributes =
|
|
aOptions.mAttributes.WasPassed() &&
|
|
aOptions.mAttributes.Value();
|
|
bool characterData =
|
|
aOptions.mCharacterData.WasPassed() &&
|
|
aOptions.mCharacterData.Value();
|
|
bool subtree = aOptions.mSubtree;
|
|
bool attributeOldValue =
|
|
aOptions.mAttributeOldValue.WasPassed() &&
|
|
aOptions.mAttributeOldValue.Value();
|
|
bool nativeAnonymousChildList = aOptions.mNativeAnonymousChildList;
|
|
bool characterDataOldValue =
|
|
aOptions.mCharacterDataOldValue.WasPassed() &&
|
|
aOptions.mCharacterDataOldValue.Value();
|
|
bool animations = aOptions.mAnimations;
|
|
|
|
if (!aOptions.mAttributes.WasPassed() &&
|
|
(aOptions.mAttributeOldValue.WasPassed() ||
|
|
aOptions.mAttributeFilter.WasPassed())) {
|
|
attributes = true;
|
|
}
|
|
|
|
if (!aOptions.mCharacterData.WasPassed() &&
|
|
aOptions.mCharacterDataOldValue.WasPassed()) {
|
|
characterData = true;
|
|
}
|
|
|
|
if (!(childList || attributes || characterData || animations ||
|
|
nativeAnonymousChildList)) {
|
|
aRv.Throw(NS_ERROR_DOM_TYPE_ERR);
|
|
return;
|
|
}
|
|
|
|
if (aOptions.mAttributeOldValue.WasPassed() &&
|
|
aOptions.mAttributeOldValue.Value() &&
|
|
aOptions.mAttributes.WasPassed() &&
|
|
!aOptions.mAttributes.Value()) {
|
|
aRv.Throw(NS_ERROR_DOM_TYPE_ERR);
|
|
return;
|
|
}
|
|
|
|
if (aOptions.mAttributeFilter.WasPassed() &&
|
|
aOptions.mAttributes.WasPassed() &&
|
|
!aOptions.mAttributes.Value()) {
|
|
aRv.Throw(NS_ERROR_DOM_TYPE_ERR);
|
|
return;
|
|
}
|
|
|
|
if (aOptions.mCharacterDataOldValue.WasPassed() &&
|
|
aOptions.mCharacterDataOldValue.Value() &&
|
|
aOptions.mCharacterData.WasPassed() &&
|
|
!aOptions.mCharacterData.Value()) {
|
|
aRv.Throw(NS_ERROR_DOM_TYPE_ERR);
|
|
return;
|
|
}
|
|
|
|
nsCOMArray<nsIAtom> filters;
|
|
bool allAttrs = true;
|
|
if (aOptions.mAttributeFilter.WasPassed()) {
|
|
allAttrs = false;
|
|
const mozilla::dom::Sequence<nsString>& filtersAsString =
|
|
aOptions.mAttributeFilter.Value();
|
|
uint32_t len = filtersAsString.Length();
|
|
filters.SetCapacity(len);
|
|
|
|
for (uint32_t i = 0; i < len; ++i) {
|
|
filters.AppendElement(NS_Atomize(filtersAsString[i]));
|
|
}
|
|
}
|
|
|
|
nsMutationReceiver* r = GetReceiverFor(&aTarget, true, animations);
|
|
r->SetChildList(childList);
|
|
r->SetAttributes(attributes);
|
|
r->SetCharacterData(characterData);
|
|
r->SetSubtree(subtree);
|
|
r->SetAttributeOldValue(attributeOldValue);
|
|
r->SetCharacterDataOldValue(characterDataOldValue);
|
|
r->SetNativeAnonymousChildList(nativeAnonymousChildList);
|
|
r->SetAttributeFilter(Move(filters));
|
|
r->SetAllAttributes(allAttrs);
|
|
r->SetAnimations(animations);
|
|
r->RemoveClones();
|
|
|
|
#ifdef DEBUG
|
|
for (int32_t i = 0; i < mReceivers.Count(); ++i) {
|
|
NS_WARNING_ASSERTION(mReceivers[i]->Target(),
|
|
"All the receivers should have a target!");
|
|
}
|
|
#endif
|
|
}
|
|
|
|
void
|
|
nsDOMMutationObserver::Disconnect()
|
|
{
|
|
for (int32_t i = 0; i < mReceivers.Count(); ++i) {
|
|
mReceivers[i]->Disconnect(false);
|
|
}
|
|
mReceivers.Clear();
|
|
mCurrentMutations.Clear();
|
|
ClearPendingRecords();
|
|
}
|
|
|
|
void
|
|
nsDOMMutationObserver::TakeRecords(
|
|
nsTArray<RefPtr<nsDOMMutationRecord> >& aRetVal)
|
|
{
|
|
aRetVal.Clear();
|
|
aRetVal.SetCapacity(mPendingMutationCount);
|
|
RefPtr<nsDOMMutationRecord> current;
|
|
current.swap(mFirstPendingMutation);
|
|
for (uint32_t i = 0; i < mPendingMutationCount; ++i) {
|
|
RefPtr<nsDOMMutationRecord> next;
|
|
current->mNext.swap(next);
|
|
if (!mMergeAttributeRecords ||
|
|
!MergeableAttributeRecord(aRetVal.SafeLastElement(nullptr),
|
|
current)) {
|
|
*aRetVal.AppendElement() = current.forget();
|
|
}
|
|
current.swap(next);
|
|
}
|
|
ClearPendingRecords();
|
|
}
|
|
|
|
void
|
|
nsDOMMutationObserver::GetObservingInfo(
|
|
nsTArray<Nullable<MutationObservingInfo>>& aResult,
|
|
mozilla::ErrorResult& aRv)
|
|
{
|
|
aResult.SetCapacity(mReceivers.Count());
|
|
for (int32_t i = 0; i < mReceivers.Count(); ++i) {
|
|
MutationObservingInfo& info = aResult.AppendElement()->SetValue();
|
|
nsMutationReceiver* mr = mReceivers[i];
|
|
info.mChildList = mr->ChildList();
|
|
info.mAttributes.Construct(mr->Attributes());
|
|
info.mCharacterData.Construct(mr->CharacterData());
|
|
info.mSubtree = mr->Subtree();
|
|
info.mAttributeOldValue.Construct(mr->AttributeOldValue());
|
|
info.mCharacterDataOldValue.Construct(mr->CharacterDataOldValue());
|
|
info.mNativeAnonymousChildList = mr->NativeAnonymousChildList();
|
|
info.mAnimations = mr->Animations();
|
|
nsCOMArray<nsIAtom>& filters = mr->AttributeFilter();
|
|
if (filters.Count()) {
|
|
info.mAttributeFilter.Construct();
|
|
mozilla::dom::Sequence<nsString>& filtersAsStrings =
|
|
info.mAttributeFilter.Value();
|
|
nsString* strings = filtersAsStrings.AppendElements(filters.Count(),
|
|
mozilla::fallible);
|
|
if (!strings) {
|
|
aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
|
|
return;
|
|
}
|
|
for (int32_t j = 0; j < filters.Count(); ++j) {
|
|
filters[j]->ToString(strings[j]);
|
|
}
|
|
}
|
|
info.mObservedNode = mr->Target();
|
|
}
|
|
}
|
|
|
|
// static
|
|
already_AddRefed<nsDOMMutationObserver>
|
|
nsDOMMutationObserver::Constructor(const mozilla::dom::GlobalObject& aGlobal,
|
|
mozilla::dom::MutationCallback& aCb,
|
|
mozilla::ErrorResult& aRv)
|
|
{
|
|
nsCOMPtr<nsPIDOMWindowInner> window = do_QueryInterface(aGlobal.GetAsSupports());
|
|
if (!window) {
|
|
aRv.Throw(NS_ERROR_FAILURE);
|
|
return nullptr;
|
|
}
|
|
MOZ_ASSERT(window->IsInnerWindow());
|
|
bool isChrome = nsContentUtils::IsChromeDoc(window->GetExtantDoc());
|
|
RefPtr<nsDOMMutationObserver> observer =
|
|
new nsDOMMutationObserver(window.forget(), aCb, isChrome);
|
|
return observer.forget();
|
|
}
|
|
|
|
|
|
bool
|
|
nsDOMMutationObserver::MergeableAttributeRecord(nsDOMMutationRecord* aOldRecord,
|
|
nsDOMMutationRecord* aRecord)
|
|
{
|
|
MOZ_ASSERT(mMergeAttributeRecords);
|
|
return
|
|
aOldRecord &&
|
|
aOldRecord->mType == nsGkAtoms::attributes &&
|
|
aOldRecord->mType == aRecord->mType &&
|
|
aOldRecord->mTarget == aRecord->mTarget &&
|
|
aOldRecord->mAttrName == aRecord->mAttrName &&
|
|
aOldRecord->mAttrNamespace.Equals(aRecord->mAttrNamespace);
|
|
}
|
|
|
|
void
|
|
nsDOMMutationObserver::HandleMutation()
|
|
{
|
|
NS_ASSERTION(nsContentUtils::IsSafeToRunScript(), "Whaat!");
|
|
NS_ASSERTION(mCurrentMutations.IsEmpty(),
|
|
"Still generating MutationRecords?");
|
|
|
|
mWaitingForRun = false;
|
|
|
|
for (int32_t i = 0; i < mReceivers.Count(); ++i) {
|
|
mReceivers[i]->RemoveClones();
|
|
}
|
|
mTransientReceivers.Clear();
|
|
|
|
nsPIDOMWindowOuter* outer = mOwner->GetOuterWindow();
|
|
if (!mPendingMutationCount || !outer ||
|
|
outer->GetCurrentInnerWindow() != mOwner) {
|
|
ClearPendingRecords();
|
|
return;
|
|
}
|
|
|
|
mozilla::dom::Sequence<mozilla::OwningNonNull<nsDOMMutationRecord> >
|
|
mutations;
|
|
if (mutations.SetCapacity(mPendingMutationCount, mozilla::fallible)) {
|
|
// We can't use TakeRecords easily here, because it deals with a
|
|
// different type of array, and we want to optimize out any extra copying.
|
|
RefPtr<nsDOMMutationRecord> current;
|
|
current.swap(mFirstPendingMutation);
|
|
for (uint32_t i = 0; i < mPendingMutationCount; ++i) {
|
|
RefPtr<nsDOMMutationRecord> next;
|
|
current->mNext.swap(next);
|
|
if (!mMergeAttributeRecords ||
|
|
!MergeableAttributeRecord(mutations.Length() ?
|
|
mutations.LastElement().get() : nullptr,
|
|
current)) {
|
|
*mutations.AppendElement(mozilla::fallible) = current;
|
|
}
|
|
current.swap(next);
|
|
}
|
|
}
|
|
ClearPendingRecords();
|
|
|
|
mCallback->Call(this, mutations, *this);
|
|
}
|
|
|
|
class AsyncMutationHandler : public mozilla::Runnable
|
|
{
|
|
public:
|
|
NS_IMETHOD Run() override
|
|
{
|
|
nsDOMMutationObserver::HandleMutations();
|
|
return NS_OK;
|
|
}
|
|
};
|
|
|
|
void
|
|
nsDOMMutationObserver::HandleMutationsInternal()
|
|
{
|
|
if (!nsContentUtils::IsSafeToRunScript()) {
|
|
nsContentUtils::AddScriptRunner(new AsyncMutationHandler());
|
|
return;
|
|
}
|
|
static RefPtr<nsDOMMutationObserver> sCurrentObserver;
|
|
if (sCurrentObserver && !sCurrentObserver->Suppressed()) {
|
|
// In normal cases sScheduledMutationObservers will be handled
|
|
// after previous mutations are handled. But in case some
|
|
// callback calls a sync API, which spins the eventloop, we need to still
|
|
// process other mutations happening during that sync call.
|
|
// This does *not* catch all cases, but should work for stuff running
|
|
// in separate tabs.
|
|
return;
|
|
}
|
|
|
|
mozilla::AutoSlowOperation aso;
|
|
|
|
nsTArray<RefPtr<nsDOMMutationObserver> >* suppressedObservers = nullptr;
|
|
|
|
while (sScheduledMutationObservers) {
|
|
AutoTArray<RefPtr<nsDOMMutationObserver>, 4>* observers =
|
|
sScheduledMutationObservers;
|
|
sScheduledMutationObservers = nullptr;
|
|
for (uint32_t i = 0; i < observers->Length(); ++i) {
|
|
sCurrentObserver = static_cast<nsDOMMutationObserver*>((*observers)[i]);
|
|
if (!sCurrentObserver->Suppressed()) {
|
|
sCurrentObserver->HandleMutation();
|
|
} else {
|
|
if (!suppressedObservers) {
|
|
suppressedObservers = new nsTArray<RefPtr<nsDOMMutationObserver> >;
|
|
}
|
|
if (!suppressedObservers->Contains(sCurrentObserver)) {
|
|
suppressedObservers->AppendElement(sCurrentObserver);
|
|
}
|
|
}
|
|
}
|
|
delete observers;
|
|
aso.CheckForInterrupt();
|
|
}
|
|
|
|
if (suppressedObservers) {
|
|
for (uint32_t i = 0; i < suppressedObservers->Length(); ++i) {
|
|
static_cast<nsDOMMutationObserver*>(suppressedObservers->ElementAt(i))->
|
|
RescheduleForRun();
|
|
}
|
|
delete suppressedObservers;
|
|
suppressedObservers = nullptr;
|
|
}
|
|
sCurrentObserver = nullptr;
|
|
}
|
|
|
|
nsDOMMutationRecord*
|
|
nsDOMMutationObserver::CurrentRecord(nsIAtom* aType)
|
|
{
|
|
NS_ASSERTION(sMutationLevel > 0, "Unexpected mutation level!");
|
|
|
|
while (mCurrentMutations.Length() < sMutationLevel) {
|
|
mCurrentMutations.AppendElement(static_cast<nsDOMMutationRecord*>(nullptr));
|
|
}
|
|
|
|
uint32_t last = sMutationLevel - 1;
|
|
if (!mCurrentMutations[last]) {
|
|
RefPtr<nsDOMMutationRecord> r = new nsDOMMutationRecord(aType, GetParentObject());
|
|
mCurrentMutations[last] = r;
|
|
AppendMutationRecord(r.forget());
|
|
ScheduleForRun();
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
MOZ_ASSERT(sCurrentlyHandlingObservers->Length() == sMutationLevel);
|
|
for (size_t i = 0; i < sCurrentlyHandlingObservers->Length(); ++i) {
|
|
MOZ_ASSERT(sCurrentlyHandlingObservers->ElementAt(i).Contains(this),
|
|
"MutationObserver should be added as an observer of all the "
|
|
"nested mutations!");
|
|
}
|
|
#endif
|
|
|
|
NS_ASSERTION(mCurrentMutations[last]->mType == aType,
|
|
"Unexpected MutationRecord type!");
|
|
|
|
return mCurrentMutations[last];
|
|
}
|
|
|
|
nsDOMMutationObserver::~nsDOMMutationObserver()
|
|
{
|
|
for (int32_t i = 0; i < mReceivers.Count(); ++i) {
|
|
mReceivers[i]->RemoveClones();
|
|
}
|
|
}
|
|
|
|
void
|
|
nsDOMMutationObserver::EnterMutationHandling()
|
|
{
|
|
++sMutationLevel;
|
|
}
|
|
|
|
// Leave the current mutation level (there can be several levels if in case
|
|
// of nested calls to the nsIMutationObserver methods).
|
|
// The most recent mutation record is removed from mCurrentMutations, so
|
|
// that is doesn't get modified anymore by receivers.
|
|
void
|
|
nsDOMMutationObserver::LeaveMutationHandling()
|
|
{
|
|
if (sCurrentlyHandlingObservers &&
|
|
sCurrentlyHandlingObservers->Length() == sMutationLevel) {
|
|
nsTArray<RefPtr<nsDOMMutationObserver> >& obs =
|
|
sCurrentlyHandlingObservers->ElementAt(sMutationLevel - 1);
|
|
for (uint32_t i = 0; i < obs.Length(); ++i) {
|
|
nsDOMMutationObserver* o =
|
|
static_cast<nsDOMMutationObserver*>(obs[i]);
|
|
if (o->mCurrentMutations.Length() == sMutationLevel) {
|
|
// It is already in pending mutations.
|
|
o->mCurrentMutations.RemoveElementAt(sMutationLevel - 1);
|
|
}
|
|
}
|
|
sCurrentlyHandlingObservers->RemoveElementAt(sMutationLevel - 1);
|
|
}
|
|
--sMutationLevel;
|
|
}
|
|
|
|
void
|
|
nsDOMMutationObserver::AddCurrentlyHandlingObserver(nsDOMMutationObserver* aObserver,
|
|
uint32_t aMutationLevel)
|
|
{
|
|
NS_ASSERTION(aMutationLevel > 0, "Unexpected mutation level!");
|
|
|
|
if (aMutationLevel > 1) {
|
|
// MutationObserver must be in the currently handling observer list
|
|
// in all the nested levels.
|
|
AddCurrentlyHandlingObserver(aObserver, aMutationLevel - 1);
|
|
}
|
|
|
|
if (!sCurrentlyHandlingObservers) {
|
|
sCurrentlyHandlingObservers =
|
|
new AutoTArray<AutoTArray<RefPtr<nsDOMMutationObserver>, 4>, 4>;
|
|
}
|
|
|
|
while (sCurrentlyHandlingObservers->Length() < aMutationLevel) {
|
|
sCurrentlyHandlingObservers->InsertElementAt(
|
|
sCurrentlyHandlingObservers->Length());
|
|
}
|
|
|
|
uint32_t index = aMutationLevel - 1;
|
|
if (!sCurrentlyHandlingObservers->ElementAt(index).Contains(aObserver)) {
|
|
sCurrentlyHandlingObservers->ElementAt(index).AppendElement(aObserver);
|
|
}
|
|
}
|
|
|
|
void
|
|
nsDOMMutationObserver::Shutdown()
|
|
{
|
|
delete sCurrentlyHandlingObservers;
|
|
sCurrentlyHandlingObservers = nullptr;
|
|
delete sScheduledMutationObservers;
|
|
sScheduledMutationObservers = nullptr;
|
|
}
|
|
|
|
nsAutoMutationBatch*
|
|
nsAutoMutationBatch::sCurrentBatch = nullptr;
|
|
|
|
void
|
|
nsAutoMutationBatch::Done()
|
|
{
|
|
if (sCurrentBatch != this) {
|
|
return;
|
|
}
|
|
|
|
sCurrentBatch = mPreviousBatch;
|
|
if (mObservers.IsEmpty()) {
|
|
nsDOMMutationObserver::LeaveMutationHandling();
|
|
// Nothing to do.
|
|
return;
|
|
}
|
|
|
|
uint32_t len = mObservers.Length();
|
|
for (uint32_t i = 0; i < len; ++i) {
|
|
nsDOMMutationObserver* ob = mObservers[i].mObserver;
|
|
bool wantsChildList = mObservers[i].mWantsChildList;
|
|
|
|
RefPtr<nsSimpleContentList> removedList;
|
|
if (wantsChildList) {
|
|
removedList = new nsSimpleContentList(mBatchTarget);
|
|
}
|
|
|
|
nsTArray<nsMutationReceiver*> allObservers;
|
|
ob->GetAllSubtreeObserversFor(mBatchTarget, allObservers);
|
|
|
|
int32_t j = mFromFirstToLast ? 0 : mRemovedNodes.Length() - 1;
|
|
int32_t end = mFromFirstToLast ? mRemovedNodes.Length() : -1;
|
|
for (; j != end; mFromFirstToLast ? ++j : --j) {
|
|
nsCOMPtr<nsIContent> removed = mRemovedNodes[j];
|
|
if (removedList) {
|
|
removedList->AppendElement(removed);
|
|
}
|
|
|
|
if (allObservers.Length()) {
|
|
nsCOMArray<nsMutationReceiver>* transientReceivers = nullptr;
|
|
ob->mTransientReceivers.Get(removed, &transientReceivers);
|
|
if (!transientReceivers) {
|
|
transientReceivers = new nsCOMArray<nsMutationReceiver>();
|
|
ob->mTransientReceivers.Put(removed, transientReceivers);
|
|
}
|
|
for (uint32_t k = 0; k < allObservers.Length(); ++k) {
|
|
nsMutationReceiver* r = allObservers[k];
|
|
nsMutationReceiver* orig = r->GetParent() ? r->GetParent() : r;
|
|
if (ob->GetReceiverFor(removed, false, false) != orig) {
|
|
// Make sure the elements which are removed from the
|
|
// subtree are kept in the same observation set.
|
|
nsMutationReceiver* tr;
|
|
if (orig->Animations()) {
|
|
tr = nsAnimationReceiver::Create(removed, orig);
|
|
} else {
|
|
tr = nsMutationReceiver::Create(removed, orig);
|
|
}
|
|
transientReceivers->AppendObject(tr);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (wantsChildList && (mRemovedNodes.Length() || mAddedNodes.Length())) {
|
|
RefPtr<nsSimpleContentList> addedList =
|
|
new nsSimpleContentList(mBatchTarget);
|
|
for (uint32_t i = 0; i < mAddedNodes.Length(); ++i) {
|
|
addedList->AppendElement(mAddedNodes[i]);
|
|
}
|
|
RefPtr<nsDOMMutationRecord> m =
|
|
new nsDOMMutationRecord(nsGkAtoms::childList,
|
|
ob->GetParentObject());
|
|
m->mTarget = mBatchTarget;
|
|
m->mRemovedNodes = removedList;
|
|
m->mAddedNodes = addedList;
|
|
m->mPreviousSibling = mPrevSibling;
|
|
m->mNextSibling = mNextSibling;
|
|
ob->AppendMutationRecord(m.forget());
|
|
}
|
|
// Always schedule the observer so that transient receivers are
|
|
// removed correctly.
|
|
ob->ScheduleForRun();
|
|
}
|
|
nsDOMMutationObserver::LeaveMutationHandling();
|
|
}
|
|
|
|
nsAutoAnimationMutationBatch*
|
|
nsAutoAnimationMutationBatch::sCurrentBatch = nullptr;
|
|
|
|
void
|
|
nsAutoAnimationMutationBatch::Done()
|
|
{
|
|
if (sCurrentBatch != this) {
|
|
return;
|
|
}
|
|
|
|
sCurrentBatch = nullptr;
|
|
if (mObservers.IsEmpty()) {
|
|
nsDOMMutationObserver::LeaveMutationHandling();
|
|
// Nothing to do.
|
|
return;
|
|
}
|
|
|
|
mBatchTargets.Sort(TreeOrderComparator());
|
|
|
|
for (nsDOMMutationObserver* ob : mObservers) {
|
|
bool didAddRecords = false;
|
|
|
|
for (nsINode* target : mBatchTargets) {
|
|
EntryArray* entries = mEntryTable.Get(target);
|
|
MOZ_ASSERT(entries,
|
|
"Targets in entry table and targets list should match");
|
|
|
|
RefPtr<nsDOMMutationRecord> m =
|
|
new nsDOMMutationRecord(nsGkAtoms::animations, ob->GetParentObject());
|
|
m->mTarget = target;
|
|
|
|
for (const Entry& e : *entries) {
|
|
if (e.mState == eState_Added) {
|
|
m->mAddedAnimations.AppendElement(e.mAnimation);
|
|
} else if (e.mState == eState_Removed) {
|
|
m->mRemovedAnimations.AppendElement(e.mAnimation);
|
|
} else if (e.mState == eState_RemainedPresent && e.mChanged) {
|
|
m->mChangedAnimations.AppendElement(e.mAnimation);
|
|
}
|
|
}
|
|
|
|
if (!m->mAddedAnimations.IsEmpty() ||
|
|
!m->mChangedAnimations.IsEmpty() ||
|
|
!m->mRemovedAnimations.IsEmpty()) {
|
|
ob->AppendMutationRecord(m.forget());
|
|
didAddRecords = true;
|
|
}
|
|
}
|
|
|
|
if (didAddRecords) {
|
|
ob->ScheduleForRun();
|
|
}
|
|
}
|
|
nsDOMMutationObserver::LeaveMutationHandling();
|
|
}
|