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263 lines
10 KiB
C++
263 lines
10 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 DEFINE_NOTIFIERS(func_, params_) \
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auto notifyPresShell = [&](PresShell* aPresShell) { \
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aPresShell->func_ params_; \
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}; \
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auto notifyObserver = [&](nsIMutationObserver* aObserver) { \
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aObserver->func_ params_; \
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};
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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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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 && !observers->isEmpty()) {
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for (auto iter = observers->begin(); iter != observers->end(); ++iter) {
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aFunc(&*iter);
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}
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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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return last;
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}
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enum class IsRemoval { No, Yes };
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enum class ShouldAssert { No, Yes };
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template <IsRemoval aIsRemoval = IsRemoval::No,
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ShouldAssert aShouldAssert = ShouldAssert::Yes,
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typename NotifyPresShell, typename NotifyObserver>
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static inline void Notify(nsINode* aNode, NotifyPresShell& aNotifyPresShell,
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NotifyObserver& aNotifyObserver) {
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Document* doc = aNode->OwnerDoc();
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nsDOMMutationEnterLeave enterLeave(doc);
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const bool wasConnected = aNode->IsInComposedDoc();
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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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if (aIsRemoval == IsRemoval::Yes && wasConnected) {
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NOTIFY_PRESSHELL(aNotifyPresShell);
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}
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nsINode* last = ForEachAncestorObserver(aNode, aNotifyObserver);
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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 (aIsRemoval == IsRemoval::No && last == doc) {
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NOTIFY_PRESSHELL(aNotifyPresShell);
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}
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if (aShouldAssert == ShouldAssert::Yes) {
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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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}
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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); \
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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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DEFINE_NOTIFIERS(CharacterDataWillChange, (aContent, aInfo));
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Notify(aContent, notifyPresShell, notifyObserver);
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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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DEFINE_NOTIFIERS(CharacterDataChanged, (aContent, aInfo));
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Notify(aContent, notifyPresShell, notifyObserver);
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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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DEFINE_NOTIFIERS(AttributeWillChange,
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(aElement, aNameSpaceID, aAttribute, aModType));
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Notify(aElement, notifyPresShell, notifyObserver);
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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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DEFINE_NOTIFIERS(AttributeChanged,
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(aElement, aNameSpaceID, aAttribute, aModType, aOldValue));
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Notify(aElement, notifyPresShell, notifyObserver);
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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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DEFINE_NOTIFIERS(AttributeSetToCurrentValue,
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(aElement, aNameSpaceID, aAttribute));
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Notify(aElement, notifyPresShell, notifyObserver);
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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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DEFINE_NOTIFIERS(ContentAppended, (aFirstNewContent));
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Notify(aContainer, notifyPresShell, notifyObserver);
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}
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void MutationObservers::NotifyNativeAnonymousChildListChange(
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nsIContent* aContent, bool aIsRemove) {
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DEFINE_NOTIFIERS(NativeAnonymousChildListChange, (aContent, aIsRemove));
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if (aIsRemove) {
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// We can't actually assert that we reach the document if we're connected,
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// since this notification runs from UnbindFromTree.
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Notify<IsRemoval::Yes, ShouldAssert::No>(aContent, notifyPresShell,
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notifyObserver);
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} else {
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Notify(aContent, notifyPresShell, notifyObserver);
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}
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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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DEFINE_NOTIFIERS(ContentInserted, (aChild));
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Notify(aContainer, notifyPresShell, notifyObserver);
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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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DEFINE_NOTIFIERS(ContentRemoved, (aChild, aPreviousSibling));
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Notify<IsRemoval::Yes>(aContainer, notifyPresShell, notifyObserver);
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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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// We don't notify the PresShell, so pass an empty lambda.
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auto notifyPresShell = [](PresShell* aPresShell) {};
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auto notifyObserver = [&](nsIMutationObserver* aObserver) {
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aObserver->ARIAAttributeDefaultWillChange(aElement, aAttribute, aModType);
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};
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Notify(aElement, notifyPresShell, notifyObserver);
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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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// We don't notify the PresShell, so pass an empty lambda.
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auto notifyPresShell = [](PresShell* aPresShell) {};
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auto notifyObserver = [&](nsIMutationObserver* aObserver) {
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aObserver->ARIAAttributeDefaultChanged(aElement, aAttribute, aModType);
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};
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Notify(aElement, notifyPresShell, notifyObserver);
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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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