mirror of
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251 lines
9.6 KiB
C++
251 lines
9.6 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 "MutationObservers.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/DocumentInlines.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 "PLDHashTable.h"
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#include "nsCOMArray.h"
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#include "nsPIDOMWindow.h"
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#include "nsXULElement.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/KeyframeEffect.h"
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#include "mozilla/PresShell.h"
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#include "nsWrapperCacheInlines.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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#define NOTIFY_PRESSHELL(notify_) \
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if (PresShell* presShell = doc->GetObservingPresShell()) { \
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notify_(presShell); \
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}
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#define NOTIFIER(func_, ...) \
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[&](nsIMutationObserver* aObserver) { aObserver->func_(__VA_ARGS__); }
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template <typename NotifyObserver>
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static inline nsINode* ForEachAncestorObserver(nsINode* aNode,
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NotifyObserver& aFunc,
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uint32_t aCallback) {
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nsINode* last;
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nsINode* node = aNode;
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do {
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mozilla::SafeDoublyLinkedList<nsIMutationObserver>* observers =
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node->GetMutationObservers();
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if (observers) {
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for (auto iter = observers->begin(); iter != observers->end(); ++iter) {
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if (iter->IsCallbackEnabled(aCallback)) {
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aFunc(&*iter);
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}
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}
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}
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last = node;
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if (!(node = node->GetParentNode())) {
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if (ShadowRoot* shadow = ShadowRoot::FromNode(last)) {
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node = shadow->GetHost();
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}
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}
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} while (node);
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return last;
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}
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// Whether to notify to the PresShell about a mutation.
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// For removals, the pres shell gets notified first, since it needs to operate
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// on the "old" DOM shape.
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enum class NotifyPresShell { No, Before, After };
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template <NotifyPresShell aNotifyPresShell = NotifyPresShell::After,
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typename NotifyObserver>
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static inline void Notify(nsINode* aNode, NotifyObserver&& aNotify,
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uint32_t aCallback) {
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Document* doc = aNode->OwnerDoc();
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nsDOMMutationEnterLeave enterLeave(doc);
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#ifdef DEBUG
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const bool wasConnected = aNode->IsInComposedDoc();
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#endif
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if constexpr (aNotifyPresShell == NotifyPresShell::Before) {
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if (aNode->IsInComposedDoc()) {
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NOTIFY_PRESSHELL(aNotify);
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}
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}
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nsINode* last = ForEachAncestorObserver(aNode, aNotify, aCallback);
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// For non-removals, the pres shell gets notified last, since it needs to
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// operate on the "final" DOM shape.
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if constexpr (aNotifyPresShell == NotifyPresShell::After) {
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if (last == doc) {
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NOTIFY_PRESSHELL(aNotify);
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}
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}
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MOZ_ASSERT((last == doc) == wasConnected,
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"If we were connected we should notify all ancestors all the "
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"way to the document");
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}
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#define IMPL_ANIMATION_NOTIFICATION(func_, content_, params_) \
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PR_BEGIN_MACRO \
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nsDOMMutationEnterLeave enterLeave(doc); \
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auto forEach = [&](nsIMutationObserver* aObserver) { \
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if (nsCOMPtr<nsIAnimationObserver> obs = do_QueryInterface(aObserver)) { \
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obs->func_ params_; \
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} \
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}; \
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ForEachAncestorObserver(content_, forEach, nsIMutationObserver::k##func_); \
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PR_END_MACRO
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namespace mozilla {
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void MutationObservers::NotifyCharacterDataWillChange(
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nsIContent* aContent, const CharacterDataChangeInfo& aInfo) {
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Notify(aContent, NOTIFIER(CharacterDataWillChange, aContent, aInfo),
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nsIMutationObserver::kCharacterDataWillChange);
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}
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void MutationObservers::NotifyCharacterDataChanged(
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nsIContent* aContent, const CharacterDataChangeInfo& aInfo) {
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aContent->OwnerDoc()->Changed();
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Notify(aContent, NOTIFIER(CharacterDataChanged, aContent, aInfo),
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nsIMutationObserver::kCharacterDataChanged);
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}
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void MutationObservers::NotifyAttributeWillChange(Element* aElement,
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int32_t aNameSpaceID,
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nsAtom* aAttribute,
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int32_t aModType) {
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Notify(aElement,
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NOTIFIER(AttributeWillChange, aElement, aNameSpaceID, aAttribute,
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aModType),
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nsIMutationObserver::kAttributeWillChange);
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}
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void MutationObservers::NotifyAttributeChanged(Element* aElement,
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int32_t aNameSpaceID,
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nsAtom* aAttribute,
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int32_t aModType,
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const nsAttrValue* aOldValue) {
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aElement->OwnerDoc()->Changed();
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Notify(aElement,
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NOTIFIER(AttributeChanged, aElement, aNameSpaceID, aAttribute,
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aModType, aOldValue),
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nsIMutationObserver::kAttributeChanged);
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}
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void MutationObservers::NotifyAttributeSetToCurrentValue(Element* aElement,
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int32_t aNameSpaceID,
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nsAtom* aAttribute) {
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Notify(
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aElement,
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NOTIFIER(AttributeSetToCurrentValue, aElement, aNameSpaceID, aAttribute),
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nsIMutationObserver::kAttributeSetToCurrentValue);
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}
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void MutationObservers::NotifyContentAppended(nsIContent* aContainer,
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nsIContent* aFirstNewContent) {
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aContainer->OwnerDoc()->Changed();
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Notify(aContainer, NOTIFIER(ContentAppended, aFirstNewContent),
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nsIMutationObserver::kContentAppended);
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}
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void MutationObservers::NotifyContentInserted(nsINode* aContainer,
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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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aContainer->OwnerDoc()->Changed();
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Notify(aContainer, NOTIFIER(ContentInserted, aChild),
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nsIMutationObserver::kContentInserted);
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}
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void MutationObservers::NotifyContentRemoved(nsINode* aContainer,
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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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aContainer->OwnerDoc()->Changed();
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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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Notify<NotifyPresShell::Before>(
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aContainer, NOTIFIER(ContentRemoved, aChild, aPreviousSibling),
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nsIMutationObserver::kContentRemoved);
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}
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void MutationObservers::NotifyARIAAttributeDefaultWillChange(
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mozilla::dom::Element* aElement, nsAtom* aAttribute, int32_t aModType) {
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Notify<NotifyPresShell::No>(
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aElement,
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NOTIFIER(ARIAAttributeDefaultWillChange, aElement, aAttribute, aModType),
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nsIMutationObserver::kARIAAttributeDefaultWillChange);
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}
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void MutationObservers::NotifyARIAAttributeDefaultChanged(
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mozilla::dom::Element* aElement, nsAtom* aAttribute, int32_t aModType) {
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Notify<NotifyPresShell::No>(
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aElement,
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NOTIFIER(ARIAAttributeDefaultChanged, aElement, aAttribute, aModType),
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nsIMutationObserver::kARIAAttributeDefaultChanged);
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}
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} // namespace mozilla
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void MutationObservers::NotifyAnimationMutated(
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dom::Animation* aAnimation, AnimationMutationType aMutatedType) {
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MOZ_ASSERT(aAnimation);
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NonOwningAnimationTarget target = aAnimation->GetTargetForAnimation();
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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 MutationObservers::NotifyAnimationAdded(dom::Animation* aAnimation) {
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NotifyAnimationMutated(aAnimation, AnimationMutationType::Added);
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}
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void MutationObservers::NotifyAnimationChanged(dom::Animation* aAnimation) {
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NotifyAnimationMutated(aAnimation, AnimationMutationType::Changed);
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}
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void MutationObservers::NotifyAnimationRemoved(dom::Animation* aAnimation) {
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NotifyAnimationMutated(aAnimation, AnimationMutationType::Removed);
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}
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