Adding upstream version 115.7.0esr.upstream/115.7.0esr

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 250 insertions, 0 deletions

diff --git a/dom/base/MutationObservers.cpp b/dom/base/MutationObservers.cpp
new file mode 100644
index 0000000000..e3e7c8b02e
--- /dev/null
+++ b/dom/base/MutationObservers.cpp
@@ -0,0 +1,250 @@
+/* -*- 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"
+#include "nsXULElement.h"
+#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;
+
+#define NOTIFY_PRESSHELL(notify_)                            \
+  if (PresShell* presShell = doc->GetObservingPresShell()) { \
+    notify_(presShell);                                      \
+  }
+
+#define NOTIFIER(func_, ...) \
+  [&](nsIMutationObserver* aObserver) { aObserver->func_(__VA_ARGS__); }
+
+template <typename NotifyObserver>
+static inline nsINode* ForEachAncestorObserver(nsINode* aNode,
+                                               NotifyObserver& aFunc,
+                                               uint32_t aCallback) {
+  nsINode* last;
+  nsINode* node = aNode;
+  do {
+    mozilla::SafeDoublyLinkedList<nsIMutationObserver>* observers =
+        node->GetMutationObservers();
+    if (observers) {
+      for (auto iter = observers->begin(); iter != observers->end(); ++iter) {
+        if (iter->IsCallbackEnabled(aCallback)) {
+          aFunc(&*iter);
+        }
+      }
+    }
+    last = node;
+    if (!(node = node->GetParentNode())) {
+      if (ShadowRoot* shadow = ShadowRoot::FromNode(last)) {
+        node = shadow->GetHost();
+      }
+    }
+  } while (node);
+  return last;
+}
+
+// Whether to notify to the PresShell about a mutation.
+// For removals, the pres shell gets notified first, since it needs to operate
+// on the "old" DOM shape.
+enum class NotifyPresShell { No, Before, After };
+
+template <NotifyPresShell aNotifyPresShell = NotifyPresShell::After,
+          typename NotifyObserver>
+static inline void Notify(nsINode* aNode, NotifyObserver&& aNotify,
+                          uint32_t aCallback) {
+  Document* doc = aNode->OwnerDoc();
+  nsDOMMutationEnterLeave enterLeave(doc);
+
+#ifdef DEBUG
+  const bool wasConnected = aNode->IsInComposedDoc();
+#endif
+  if constexpr (aNotifyPresShell == NotifyPresShell::Before) {
+    if (aNode->IsInComposedDoc()) {
+      NOTIFY_PRESSHELL(aNotify);
+    }
+  }
+  nsINode* last = ForEachAncestorObserver(aNode, aNotify, aCallback);
+  // For non-removals, the pres shell gets notified last, since it needs to
+  // operate on the "final" DOM shape.
+  if constexpr (aNotifyPresShell == NotifyPresShell::After) {
+    if (last == doc) {
+      NOTIFY_PRESSHELL(aNotify);
+    }
+  }
+  MOZ_ASSERT((last == doc) == wasConnected,
+             "If we were connected we should notify all ancestors all the "
+             "way to the document");
+}
+
+#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, nsIMutationObserver::k##func_); \
+  PR_END_MACRO
+
+namespace mozilla {
+void MutationObservers::NotifyCharacterDataWillChange(
+    nsIContent* aContent, const CharacterDataChangeInfo& aInfo) {
+  Notify(aContent, NOTIFIER(CharacterDataWillChange, aContent, aInfo),
+         nsIMutationObserver::kCharacterDataWillChange);
+}
+
+void MutationObservers::NotifyCharacterDataChanged(
+    nsIContent* aContent, const CharacterDataChangeInfo& aInfo) {
+  aContent->OwnerDoc()->Changed();
+  Notify(aContent, NOTIFIER(CharacterDataChanged, aContent, aInfo),
+         nsIMutationObserver::kCharacterDataChanged);
+}
+
+void MutationObservers::NotifyAttributeWillChange(Element* aElement,
+                                                  int32_t aNameSpaceID,
+                                                  nsAtom* aAttribute,
+                                                  int32_t aModType) {
+  Notify(aElement,
+         NOTIFIER(AttributeWillChange, aElement, aNameSpaceID, aAttribute,
+                  aModType),
+         nsIMutationObserver::kAttributeWillChange);
+}
+
+void MutationObservers::NotifyAttributeChanged(Element* aElement,
+                                               int32_t aNameSpaceID,
+                                               nsAtom* aAttribute,
+                                               int32_t aModType,
+                                               const nsAttrValue* aOldValue) {
+  aElement->OwnerDoc()->Changed();
+  Notify(aElement,
+         NOTIFIER(AttributeChanged, aElement, aNameSpaceID, aAttribute,
+                  aModType, aOldValue),
+         nsIMutationObserver::kAttributeChanged);
+}
+
+void MutationObservers::NotifyAttributeSetToCurrentValue(Element* aElement,
+                                                         int32_t aNameSpaceID,
+                                                         nsAtom* aAttribute) {
+  Notify(
+      aElement,
+      NOTIFIER(AttributeSetToCurrentValue, aElement, aNameSpaceID, aAttribute),
+      nsIMutationObserver::kAttributeSetToCurrentValue);
+}
+
+void MutationObservers::NotifyContentAppended(nsIContent* aContainer,
+                                              nsIContent* aFirstNewContent) {
+  aContainer->OwnerDoc()->Changed();
+  Notify(aContainer, NOTIFIER(ContentAppended, aFirstNewContent),
+         nsIMutationObserver::kContentAppended);
+}
+
+void MutationObservers::NotifyContentInserted(nsINode* aContainer,
+                                              nsIContent* aChild) {
+  MOZ_ASSERT(aContainer->IsContent() || aContainer->IsDocument(),
+             "container must be an nsIContent or an Document");
+  aContainer->OwnerDoc()->Changed();
+  Notify(aContainer, NOTIFIER(ContentInserted, aChild),
+         nsIMutationObserver::kContentInserted);
+}
+
+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");
+  Notify<NotifyPresShell::Before>(
+      aContainer, NOTIFIER(ContentRemoved, aChild, aPreviousSibling),
+      nsIMutationObserver::kContentRemoved);
+}
+
+void MutationObservers::NotifyARIAAttributeDefaultWillChange(
+    mozilla::dom::Element* aElement, nsAtom* aAttribute, int32_t aModType) {
+  Notify<NotifyPresShell::No>(
+      aElement,
+      NOTIFIER(ARIAAttributeDefaultWillChange, aElement, aAttribute, aModType),
+      nsIMutationObserver::kARIAAttributeDefaultWillChange);
+}
+
+void MutationObservers::NotifyARIAAttributeDefaultChanged(
+    mozilla::dom::Element* aElement, nsAtom* aAttribute, int32_t aModType) {
+  Notify<NotifyPresShell::No>(
+      aElement,
+      NOTIFIER(ARIAAttributeDefaultChanged, aElement, aAttribute, aModType),
+      nsIMutationObserver::kARIAAttributeDefaultChanged);
+}
+
+}  // 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);
+}