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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "MutationObservers.h"
#include "nsContentUtils.h"
#include "nsCSSPseudoElements.h"
#include "nsINode.h"
#include "nsIContent.h"
#include "nsIContentInlines.h"
#include "mozilla/dom/Document.h"
#include "mozilla/dom/DocumentInlines.h"
#include "mozilla/dom/Element.h"
#include "nsIMutationObserver.h"
#include "mozilla/EventListenerManager.h"
#include "PLDHashTable.h"
#include "nsCOMArray.h"
#include "nsPIDOMWindow.h"
#ifdef MOZ_XUL
# include "nsXULElement.h"
#endif
#include "nsGenericHTMLElement.h"
#include "mozilla/AnimationTarget.h"
#include "mozilla/Assertions.h"
#include "mozilla/ErrorResult.h"
#include "mozilla/dom/Animation.h"
#include "mozilla/dom/KeyframeEffect.h"
#include "mozilla/PresShell.h"
#include "nsWrapperCacheInlines.h"
#include "nsDOMMutationObserver.h"
#include "mozilla/dom/BindingUtils.h"
#include "mozilla/dom/CustomElementRegistry.h"
#include "mozilla/dom/HTMLTemplateElement.h"
#include "mozilla/dom/ShadowRoot.h"
using namespace mozilla;
using namespace mozilla::dom;
using mozilla::AutoJSContext;
#define NOTIFY_PRESSHELL_IF(condition_, forEach_) \
if (condition_) { \
if (PresShell* presShell = doc->GetObservingPresShell()) { \
forEach_(presShell); \
} \
}
#define DEFINE_NOTIFIERS(func_, params_) \
auto notifyPresShell = [&](PresShell* aPresShell) { \
aPresShell->func_ params_; \
}; \
auto notifyObserver = [&](nsIMutationObserver* aObserver) { \
aObserver->func_ params_; \
};
static inline nsINode* ForEachAncestorObserver(
nsINode* aNode, FunctionRef<void(nsIMutationObserver*)> aFunc) {
nsINode* last;
nsINode* node = aNode;
do {
nsAutoTObserverArray<nsIMutationObserver*, 1>* observers =
node->GetMutationObservers();
if (observers && !observers->IsEmpty()) {
for (nsIMutationObserver* obs : observers->ForwardRange()) {
aFunc(obs);
}
}
last = node;
if (ShadowRoot* shadow = ShadowRoot::FromNode(node)) {
node = shadow->GetHost();
} else {
node = node->GetParentNode();
}
} while (node);
return last;
}
static inline void NotifyRemovalImpl(
nsINode* aNode, FunctionRef<void(PresShell*)> aNotifyPresShell,
FunctionRef<void(nsIMutationObserver*)> aNotifyObserver) {
Document* doc = aNode->OwnerDoc();
nsDOMMutationEnterLeave enterLeave(doc);
NOTIFY_PRESSHELL_IF(aNode->GetComposedDoc(), aNotifyPresShell);
DebugOnly<nsINode*> last = ForEachAncestorObserver(aNode, aNotifyObserver);
MOZ_ASSERT((last == doc) == !!aNode->GetComposedDoc());
}
static inline void NotifyRemovalImplNoAssert(
nsINode* aNode, FunctionRef<void(PresShell*)> aNotifyPresShell,
FunctionRef<void(nsIMutationObserver*)> aNotifyObserver) {
Document* doc = aNode->OwnerDoc();
nsDOMMutationEnterLeave enterLeave(doc);
NOTIFY_PRESSHELL_IF(aNode->GetComposedDoc(), aNotifyPresShell);
ForEachAncestorObserver(aNode, aNotifyObserver);
}
static inline void NotifyNonRemovalImpl(
nsINode* aNode, FunctionRef<void(PresShell*)> aNotifyPresShell,
FunctionRef<void(nsIMutationObserver*)> aNotifyObserver) {
Document* doc = aNode->OwnerDoc();
nsDOMMutationEnterLeave enterLeave(doc);
nsINode* last = ForEachAncestorObserver(aNode, aNotifyObserver);
NOTIFY_PRESSHELL_IF(last == doc, aNotifyPresShell);
MOZ_ASSERT((last == doc) == !!aNode->GetComposedDoc());
}
#define IMPL_ANIMATION_NOTIFICATION(func_, content_, params_) \
PR_BEGIN_MACRO \
nsDOMMutationEnterLeave enterLeave(doc); \
auto forEach = [&](nsIMutationObserver* aObserver) { \
if (nsCOMPtr<nsIAnimationObserver> obs = do_QueryInterface(aObserver)) { \
obs->func_ params_; \
} \
}; \
ForEachAncestorObserver(content_, forEach); \
PR_END_MACRO
namespace mozilla {
void MutationObservers::NotifyCharacterDataWillChange(
nsIContent* aContent, const CharacterDataChangeInfo& aInfo) {
DEFINE_NOTIFIERS(CharacterDataWillChange, (aContent, aInfo));
NotifyNonRemovalImpl(aContent, notifyPresShell, notifyObserver);
}
void MutationObservers::NotifyCharacterDataChanged(
nsIContent* aContent, const CharacterDataChangeInfo& aInfo) {
aContent->OwnerDoc()->Changed();
DEFINE_NOTIFIERS(CharacterDataChanged, (aContent, aInfo));
NotifyNonRemovalImpl(aContent, notifyPresShell, notifyObserver);
}
void MutationObservers::NotifyAttributeWillChange(Element* aElement,
int32_t aNameSpaceID,
nsAtom* aAttribute,
int32_t aModType) {
DEFINE_NOTIFIERS(AttributeWillChange,
(aElement, aNameSpaceID, aAttribute, aModType));
NotifyNonRemovalImpl(aElement, notifyPresShell, notifyObserver);
}
void MutationObservers::NotifyAttributeChanged(Element* aElement,
int32_t aNameSpaceID,
nsAtom* aAttribute,
int32_t aModType,
const nsAttrValue* aOldValue) {
aElement->OwnerDoc()->Changed();
DEFINE_NOTIFIERS(AttributeChanged,
(aElement, aNameSpaceID, aAttribute, aModType, aOldValue));
NotifyNonRemovalImpl(aElement, notifyPresShell, notifyObserver);
}
void MutationObservers::NotifyAttributeSetToCurrentValue(Element* aElement,
int32_t aNameSpaceID,
nsAtom* aAttribute) {
DEFINE_NOTIFIERS(AttributeSetToCurrentValue,
(aElement, aNameSpaceID, aAttribute));
NotifyNonRemovalImpl(aElement, notifyPresShell, notifyObserver);
}
void MutationObservers::NotifyContentAppended(nsIContent* aContainer,
nsIContent* aFirstNewContent) {
aContainer->OwnerDoc()->Changed();
DEFINE_NOTIFIERS(ContentAppended, (aFirstNewContent));
NotifyNonRemovalImpl(aContainer, notifyPresShell, notifyObserver);
}
void MutationObservers::NotifyNativeAnonymousChildListChange(
nsIContent* aContent, bool aIsRemove) {
DEFINE_NOTIFIERS(NativeAnonymousChildListChange, (aContent, aIsRemove));
if (aIsRemove) {
// It doesn't reach the document since it runs from UnbindFromTree
NotifyRemovalImplNoAssert(aContent, notifyPresShell, notifyObserver);
} else {
NotifyNonRemovalImpl(aContent, notifyPresShell, notifyObserver);
}
}
void MutationObservers::NotifyContentInserted(nsINode* aContainer,
nsIContent* aChild) {
MOZ_ASSERT(aContainer->IsContent() || aContainer->IsDocument(),
"container must be an nsIContent or an Document");
aContainer->OwnerDoc()->Changed();
DEFINE_NOTIFIERS(ContentInserted, (aChild));
NotifyNonRemovalImpl(aContainer, notifyPresShell, notifyObserver);
}
void MutationObservers::NotifyContentRemoved(nsINode* aContainer,
nsIContent* aChild,
nsIContent* aPreviousSibling) {
MOZ_ASSERT(aContainer->IsContent() || aContainer->IsDocument(),
"container must be an nsIContent or an Document");
aContainer->OwnerDoc()->Changed();
MOZ_ASSERT(aChild->GetParentNode() == aContainer,
"We expect the parent link to be still around at this point");
DEFINE_NOTIFIERS(ContentRemoved, (aChild, aPreviousSibling));
NotifyRemovalImpl(aContainer, notifyPresShell, notifyObserver);
}
} // namespace mozilla
void MutationObservers::NotifyAnimationMutated(
dom::Animation* aAnimation, AnimationMutationType aMutatedType) {
MOZ_ASSERT(aAnimation);
NonOwningAnimationTarget target = aAnimation->GetTargetForAnimation();
if (!target) {
return;
}
// A pseudo element and its parent element use the same owner doc.
Document* doc = target.mElement->OwnerDoc();
if (doc->MayHaveAnimationObservers()) {
// we use the its parent element as the subject in DOM Mutation Observer.
Element* elem = target.mElement;
switch (aMutatedType) {
case AnimationMutationType::Added:
IMPL_ANIMATION_NOTIFICATION(AnimationAdded, elem, (aAnimation));
break;
case AnimationMutationType::Changed:
IMPL_ANIMATION_NOTIFICATION(AnimationChanged, elem, (aAnimation));
break;
case AnimationMutationType::Removed:
IMPL_ANIMATION_NOTIFICATION(AnimationRemoved, elem, (aAnimation));
break;
default:
MOZ_ASSERT_UNREACHABLE("unexpected mutation type");
}
}
}
void MutationObservers::NotifyAnimationAdded(dom::Animation* aAnimation) {
NotifyAnimationMutated(aAnimation, AnimationMutationType::Added);
}
void MutationObservers::NotifyAnimationChanged(dom::Animation* aAnimation) {
NotifyAnimationMutated(aAnimation, AnimationMutationType::Changed);
}
void MutationObservers::NotifyAnimationRemoved(dom::Animation* aAnimation) {
NotifyAnimationMutated(aAnimation, AnimationMutationType::Removed);
}
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