Adding upstream version 115.7.0esr.upstream/115.7.0esr

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

1 files changed, 679 insertions, 0 deletions

diff --git a/accessible/android/AccessibleWrap.cpp b/accessible/android/AccessibleWrap.cpp
new file mode 100644
index 0000000000..0b9fda291d
--- /dev/null
+++ b/accessible/android/AccessibleWrap.cpp
@@ -0,0 +1,679 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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 "AccessibleWrap.h"
+
+#include "JavaBuiltins.h"
+#include "LocalAccessible-inl.h"
+#include "HyperTextAccessible-inl.h"
+#include "AccAttributes.h"
+#include "AccEvent.h"
+#include "AndroidInputType.h"
+#include "DocAccessibleWrap.h"
+#include "SessionAccessibility.h"
+#include "TextLeafAccessible.h"
+#include "TraversalRule.h"
+#include "Pivot.h"
+#include "Platform.h"
+#include "nsAccessibilityService.h"
+#include "nsEventShell.h"
+#include "nsIAccessibleAnnouncementEvent.h"
+#include "nsAccUtils.h"
+#include "nsTextEquivUtils.h"
+#include "nsWhitespaceTokenizer.h"
+#include "RootAccessible.h"
+
+#include "mozilla/a11y/PDocAccessibleChild.h"
+#include "mozilla/jni/GeckoBundleUtils.h"
+#include "mozilla/a11y/DocAccessibleParent.h"
+
+// icu TRUE conflicting with java::sdk::Boolean::TRUE()
+// https://searchfox.org/mozilla-central/rev/ce02064d8afc8673cef83c92896ee873bd35e7ae/intl/icu/source/common/unicode/umachine.h#265
+// https://searchfox.org/mozilla-central/source/__GENERATED__/widget/android/bindings/JavaBuiltins.h#78
+#ifdef TRUE
+#  undef TRUE
+#endif
+
+using namespace mozilla::a11y;
+
+//-----------------------------------------------------
+// construction
+//-----------------------------------------------------
+AccessibleWrap::AccessibleWrap(nsIContent* aContent, DocAccessible* aDoc)
+    : LocalAccessible(aContent, aDoc), mID(SessionAccessibility::kUnsetID) {
+  if (!IPCAccessibilityActive()) {
+    MonitorAutoLock mal(nsAccessibilityService::GetAndroidMonitor());
+    SessionAccessibility::RegisterAccessible(this);
+  }
+}
+
+//-----------------------------------------------------
+// destruction
+//-----------------------------------------------------
+AccessibleWrap::~AccessibleWrap() {}
+
+nsresult AccessibleWrap::HandleAccEvent(AccEvent* aEvent) {
+  auto accessible = static_cast<AccessibleWrap*>(aEvent->GetAccessible());
+  NS_ENSURE_TRUE(accessible, NS_ERROR_FAILURE);
+  DocAccessibleWrap* doc =
+      static_cast<DocAccessibleWrap*>(accessible->Document());
+  if (doc) {
+    switch (aEvent->GetEventType()) {
+      case nsIAccessibleEvent::EVENT_TEXT_CARET_MOVED: {
+        if (accessible != aEvent->Document() && !aEvent->IsFromUserInput()) {
+          AccCaretMoveEvent* caretEvent = downcast_accEvent(aEvent);
+          HyperTextAccessible* ht = AsHyperText();
+          // Pivot to the caret's position if it has an expanded selection.
+          // This is used mostly for find in page.
+          if ((ht && ht->SelectionCount())) {
+            DOMPoint point =
+                AsHyperText()->OffsetToDOMPoint(caretEvent->GetCaretOffset());
+            if (LocalAccessible* newPos =
+                    doc->GetAccessibleOrContainer(point.node)) {
+              static_cast<AccessibleWrap*>(newPos)->PivotTo(
+                  java::SessionAccessibility::HTML_GRANULARITY_DEFAULT, true,
+                  true);
+            }
+          }
+        }
+        break;
+      }
+      case nsIAccessibleEvent::EVENT_SCROLLING_START: {
+        accessible->PivotTo(
+            java::SessionAccessibility::HTML_GRANULARITY_DEFAULT, true, true);
+        break;
+      }
+      default:
+        break;
+    }
+  }
+
+  nsresult rv = LocalAccessible::HandleAccEvent(aEvent);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  accessible->HandleLiveRegionEvent(aEvent);
+
+  if (IPCAccessibilityActive()) {
+    return NS_OK;
+  }
+
+  // The accessible can become defunct if we have an xpcom event listener
+  // which decides it would be fun to change the DOM and flush layout.
+  if (accessible->IsDefunct() || !accessible->IsBoundToParent()) {
+    return NS_OK;
+  }
+
+  if (doc) {
+    if (!doc->DocumentNode()->IsContentDocument()) {
+      return NS_OK;
+    }
+  }
+
+  RefPtr<SessionAccessibility> sessionAcc =
+      SessionAccessibility::GetInstanceFor(accessible);
+  if (!sessionAcc) {
+    return NS_OK;
+  }
+
+  switch (aEvent->GetEventType()) {
+    case nsIAccessibleEvent::EVENT_FOCUS:
+      sessionAcc->SendFocusEvent(accessible);
+      break;
+    case nsIAccessibleEvent::EVENT_VIRTUALCURSOR_CHANGED: {
+      AccVCChangeEvent* vcEvent = downcast_accEvent(aEvent);
+      if (!vcEvent->IsFromUserInput()) {
+        break;
+      }
+
+      RefPtr<AccessibleWrap> newPosition =
+          static_cast<AccessibleWrap*>(vcEvent->NewAccessible());
+      if (sessionAcc && newPosition) {
+        if (vcEvent->Reason() == nsIAccessiblePivot::REASON_POINT) {
+          sessionAcc->SendHoverEnterEvent(newPosition);
+        } else if (vcEvent->BoundaryType() == nsIAccessiblePivot::NO_BOUNDARY) {
+          sessionAcc->SendAccessibilityFocusedEvent(newPosition);
+        }
+
+        if (vcEvent->BoundaryType() != nsIAccessiblePivot::NO_BOUNDARY) {
+          sessionAcc->SendTextTraversedEvent(
+              newPosition, vcEvent->NewStartOffset(), vcEvent->NewEndOffset());
+        }
+      }
+      break;
+    }
+    case nsIAccessibleEvent::EVENT_TEXT_CARET_MOVED: {
+      AccCaretMoveEvent* event = downcast_accEvent(aEvent);
+      sessionAcc->SendTextSelectionChangedEvent(accessible,
+                                                event->GetCaretOffset());
+      break;
+    }
+    case nsIAccessibleEvent::EVENT_TEXT_INSERTED:
+    case nsIAccessibleEvent::EVENT_TEXT_REMOVED: {
+      AccTextChangeEvent* event = downcast_accEvent(aEvent);
+      sessionAcc->SendTextChangedEvent(
+          accessible, event->ModifiedText(), event->GetStartOffset(),
+          event->GetLength(), event->IsTextInserted(),
+          event->IsFromUserInput());
+      break;
+    }
+    case nsIAccessibleEvent::EVENT_STATE_CHANGE: {
+      AccStateChangeEvent* event = downcast_accEvent(aEvent);
+      auto state = event->GetState();
+      if (state & states::CHECKED) {
+        sessionAcc->SendClickedEvent(
+            accessible, java::SessionAccessibility::FLAG_CHECKABLE |
+                            (event->IsStateEnabled()
+                                 ? java::SessionAccessibility::FLAG_CHECKED
+                                 : 0));
+      }
+
+      if (state & states::EXPANDED) {
+        sessionAcc->SendClickedEvent(
+            accessible, java::SessionAccessibility::FLAG_EXPANDABLE |
+                            (event->IsStateEnabled()
+                                 ? java::SessionAccessibility::FLAG_EXPANDED
+                                 : 0));
+      }
+
+      if (state & states::SELECTED) {
+        sessionAcc->SendSelectedEvent(accessible, event->IsStateEnabled());
+      }
+
+      if (state & states::BUSY) {
+        sessionAcc->SendWindowStateChangedEvent(accessible);
+      }
+      break;
+    }
+    case nsIAccessibleEvent::EVENT_SCROLLING: {
+      AccScrollingEvent* event = downcast_accEvent(aEvent);
+      sessionAcc->SendScrollingEvent(accessible, event->ScrollX(),
+                                     event->ScrollY(), event->MaxScrollX(),
+                                     event->MaxScrollY());
+      break;
+    }
+    case nsIAccessibleEvent::EVENT_ANNOUNCEMENT: {
+      AccAnnouncementEvent* event = downcast_accEvent(aEvent);
+      sessionAcc->SendAnnouncementEvent(accessible, event->Announcement(),
+                                        event->Priority());
+      break;
+    }
+    case nsIAccessibleEvent::EVENT_REORDER: {
+      sessionAcc->SendWindowContentChangedEvent();
+      break;
+    }
+    default:
+      break;
+  }
+
+  return NS_OK;
+}
+
+void AccessibleWrap::Shutdown() {
+  if (!IPCAccessibilityActive()) {
+    MonitorAutoLock mal(nsAccessibilityService::GetAndroidMonitor());
+    SessionAccessibility::UnregisterAccessible(this);
+  }
+  LocalAccessible::Shutdown();
+}
+
+bool AccessibleWrap::DoAction(uint8_t aIndex) const {
+  if (ActionCount()) {
+    return LocalAccessible::DoAction(aIndex);
+  }
+
+  if (mContent) {
+    // We still simulate a click on an accessible even if there is no
+    // known actions. For the sake of bad markup.
+    DoCommand();
+    return true;
+  }
+
+  return false;
+}
+
+Accessible* AccessibleWrap::DoPivot(Accessible* aAccessible,
+                                    int32_t aGranularity, bool aForward,
+                                    bool aInclusive) {
+  Accessible* pivotRoot = nullptr;
+  if (aAccessible->IsRemote()) {
+    // If this is a remote accessible provide the top level
+    // remote doc as the pivot root for thread safety reasons.
+    DocAccessibleParent* doc = aAccessible->AsRemote()->Document();
+    while (doc && !doc->IsTopLevel()) {
+      doc = doc->ParentDoc();
+    }
+    MOZ_ASSERT(doc, "Failed to get top level DocAccessibleParent");
+    pivotRoot = doc;
+  }
+  a11y::Pivot pivot(pivotRoot);
+  // Depending on the start accessible, the pivot rule will either traverse
+  // local or remote accessibles exclusively.
+  TraversalRule rule(aGranularity, aAccessible->IsLocal());
+  Accessible* result = aForward ? pivot.Next(aAccessible, rule, aInclusive)
+                                : pivot.Prev(aAccessible, rule, aInclusive);
+
+  if (result && (result != aAccessible || aInclusive)) {
+    return result;
+  }
+
+  return nullptr;
+}
+
+bool AccessibleWrap::PivotTo(int32_t aGranularity, bool aForward,
+                             bool aInclusive) {
+  Accessible* result = DoPivot(this, aGranularity, aForward, aInclusive);
+  if (result) {
+    MOZ_ASSERT(result->IsLocal());
+    // Dispatch a virtual cursor change event that will be turned into an
+    // android accessibility focused changed event in the parent.
+    PivotMoveReason reason = aForward ? nsIAccessiblePivot::REASON_NEXT
+                                      : nsIAccessiblePivot::REASON_PREV;
+    LocalAccessible* localResult = result->AsLocal();
+    RefPtr<AccEvent> event = new AccVCChangeEvent(
+        localResult->Document(), this, -1, -1, localResult, -1, -1, reason,
+        nsIAccessiblePivot::NO_BOUNDARY, eFromUserInput);
+    nsEventShell::FireEvent(event);
+
+    return true;
+  }
+
+  return false;
+}
+
+void AccessibleWrap::ExploreByTouch(float aX, float aY) {
+  a11y::Pivot pivot(RootAccessible());
+  TraversalRule rule;
+
+  Accessible* maybeResult = pivot.AtPoint(aX, aY, rule);
+  LocalAccessible* result = maybeResult ? maybeResult->AsLocal() : nullptr;
+
+  if (result && result != this) {
+    RefPtr<AccEvent> event =
+        new AccVCChangeEvent(result->Document(), this, -1, -1, result, -1, -1,
+                             nsIAccessiblePivot::REASON_POINT,
+                             nsIAccessiblePivot::NO_BOUNDARY, eFromUserInput);
+    nsEventShell::FireEvent(event);
+  }
+}
+
+void AccessibleWrap::NavigateText(int32_t aGranularity, int32_t aStartOffset,
+                                  int32_t aEndOffset, bool aForward,
+                                  bool aSelect) {
+  a11y::Pivot pivot(RootAccessible());
+
+  HyperTextAccessible* editable =
+      (State() & states::EDITABLE) != 0 ? AsHyperText() : nullptr;
+
+  int32_t start = aStartOffset, end = aEndOffset;
+  // If the accessible is an editable, set the virtual cursor position
+  // to its caret offset. Otherwise use the document's virtual cursor
+  // position as a starting offset.
+  if (editable) {
+    start = end = editable->CaretOffset();
+  }
+
+  uint16_t pivotGranularity = nsIAccessiblePivot::LINE_BOUNDARY;
+  switch (aGranularity) {
+    case 1:  // MOVEMENT_GRANULARITY_CHARACTER
+      pivotGranularity = nsIAccessiblePivot::CHAR_BOUNDARY;
+      break;
+    case 2:  // MOVEMENT_GRANULARITY_WORD
+      pivotGranularity = nsIAccessiblePivot::WORD_BOUNDARY;
+      break;
+    default:
+      break;
+  }
+
+  int32_t newOffset;
+  Accessible* newAnchorBase = nullptr;
+  if (aForward) {
+    newAnchorBase = pivot.NextText(this, &start, &end, pivotGranularity);
+    newOffset = end;
+  } else {
+    newAnchorBase = pivot.PrevText(this, &start, &end, pivotGranularity);
+    newOffset = start;
+  }
+  LocalAccessible* newAnchor =
+      newAnchorBase ? newAnchorBase->AsLocal() : nullptr;
+
+  if (newAnchor && (start != aStartOffset || end != aEndOffset)) {
+    if (IsTextLeaf() && newAnchor == LocalParent()) {
+      // For paragraphs, divs, spans, etc., we put a11y focus on the text leaf
+      // node instead of the HyperTextAccessible. However, Pivot will always
+      // return a HyperTextAccessible. Android doesn't support text navigation
+      // landing on an accessible which is different to the originating
+      // accessible. Therefore, if we're still within the same text leaf,
+      // translate the offsets to the text leaf.
+      int32_t thisChild = IndexInParent();
+      HyperTextAccessible* newHyper = newAnchor->AsHyperText();
+      MOZ_ASSERT(newHyper);
+      int32_t startChild = newHyper->GetChildIndexAtOffset(start);
+      // We use end - 1 because the end offset is exclusive, so end itself
+      // might be associated with the next child.
+      int32_t endChild = newHyper->GetChildIndexAtOffset(end - 1);
+      if (startChild == thisChild && endChild == thisChild) {
+        // We've landed within the same text leaf.
+        newAnchor = this;
+        int32_t thisOffset = newHyper->GetChildOffset(thisChild);
+        start -= thisOffset;
+        end -= thisOffset;
+      }
+    }
+    RefPtr<AccEvent> event = new AccVCChangeEvent(
+        newAnchor->Document(), this, aStartOffset, aEndOffset, newAnchor, start,
+        end, nsIAccessiblePivot::REASON_NONE, pivotGranularity, eFromUserInput);
+    nsEventShell::FireEvent(event);
+  }
+
+  // If we are in an editable, move the caret to the new virtual cursor
+  // offset.
+  if (editable) {
+    if (aSelect) {
+      int32_t anchor = editable->CaretOffset();
+      if (editable->SelectionCount()) {
+        int32_t startSel, endSel;
+        GetSelectionOrCaret(&startSel, &endSel);
+        anchor = startSel == anchor ? endSel : startSel;
+      }
+      editable->SetSelectionBoundsAt(0, anchor, newOffset);
+    } else {
+      editable->SetCaretOffset(newOffset);
+    }
+  }
+}
+
+void AccessibleWrap::SetSelection(int32_t aStart, int32_t aEnd) {
+  if (HyperTextAccessible* textAcc = AsHyperText()) {
+    if (aStart == aEnd) {
+      textAcc->SetCaretOffset(aStart);
+    } else {
+      textAcc->SetSelectionBoundsAt(0, aStart, aEnd);
+    }
+  }
+}
+
+void AccessibleWrap::Cut() {
+  if ((State() & states::EDITABLE) == 0) {
+    return;
+  }
+
+  if (HyperTextAccessible* textAcc = AsHyperText()) {
+    int32_t startSel, endSel;
+    GetSelectionOrCaret(&startSel, &endSel);
+    textAcc->CutText(startSel, endSel);
+  }
+}
+
+void AccessibleWrap::Copy() {
+  if (HyperTextAccessible* textAcc = AsHyperText()) {
+    int32_t startSel, endSel;
+    GetSelectionOrCaret(&startSel, &endSel);
+    textAcc->CopyText(startSel, endSel);
+  }
+}
+
+void AccessibleWrap::Paste() {
+  if ((State() & states::EDITABLE) == 0) {
+    return;
+  }
+
+  if (IsHyperText()) {
+    RefPtr<HyperTextAccessible> textAcc = AsHyperText();
+    int32_t startSel, endSel;
+    GetSelectionOrCaret(&startSel, &endSel);
+    if (startSel != endSel) {
+      textAcc->DeleteText(startSel, endSel);
+    }
+    textAcc->PasteText(startSel);
+  }
+}
+
+void AccessibleWrap::GetSelectionOrCaret(int32_t* aStartOffset,
+                                         int32_t* aEndOffset) {
+  *aStartOffset = *aEndOffset = -1;
+  if (HyperTextAccessible* textAcc = AsHyperText()) {
+    if (!textAcc->SelectionBoundsAt(0, aStartOffset, aEndOffset)) {
+      *aStartOffset = *aEndOffset = textAcc->CaretOffset();
+    }
+  }
+}
+
+uint32_t AccessibleWrap::GetFlags(role aRole, uint64_t aState,
+                                  uint8_t aActionCount) {
+  uint32_t flags = 0;
+  if (aState & states::CHECKABLE) {
+    flags |= java::SessionAccessibility::FLAG_CHECKABLE;
+  }
+
+  if (aState & states::CHECKED) {
+    flags |= java::SessionAccessibility::FLAG_CHECKED;
+  }
+
+  if (aState & states::INVALID) {
+    flags |= java::SessionAccessibility::FLAG_CONTENT_INVALID;
+  }
+
+  if (aState & states::EDITABLE) {
+    flags |= java::SessionAccessibility::FLAG_EDITABLE;
+  }
+
+  if (aActionCount && aRole != roles::TEXT_LEAF) {
+    flags |= java::SessionAccessibility::FLAG_CLICKABLE;
+  }
+
+  if (aState & states::ENABLED) {
+    flags |= java::SessionAccessibility::FLAG_ENABLED;
+  }
+
+  if (aState & states::FOCUSABLE) {
+    flags |= java::SessionAccessibility::FLAG_FOCUSABLE;
+  }
+
+  if (aState & states::FOCUSED) {
+    flags |= java::SessionAccessibility::FLAG_FOCUSED;
+  }
+
+  if (aState & states::MULTI_LINE) {
+    flags |= java::SessionAccessibility::FLAG_MULTI_LINE;
+  }
+
+  if (aState & states::SELECTABLE) {
+    flags |= java::SessionAccessibility::FLAG_SELECTABLE;
+  }
+
+  if (aState & states::SELECTED) {
+    flags |= java::SessionAccessibility::FLAG_SELECTED;
+  }
+
+  if (aState & states::EXPANDABLE) {
+    flags |= java::SessionAccessibility::FLAG_EXPANDABLE;
+  }
+
+  if (aState & states::EXPANDED) {
+    flags |= java::SessionAccessibility::FLAG_EXPANDED;
+  }
+
+  if ((aState & (states::INVISIBLE | states::OFFSCREEN)) == 0) {
+    flags |= java::SessionAccessibility::FLAG_VISIBLE_TO_USER;
+  }
+
+  if (aRole == roles::PASSWORD_TEXT) {
+    flags |= java::SessionAccessibility::FLAG_PASSWORD;
+  }
+
+  return flags;
+}
+
+void AccessibleWrap::GetRoleDescription(role aRole, AccAttributes* aAttributes,
+                                        nsAString& aGeckoRole,
+                                        nsAString& aRoleDescription) {
+  if (aRole == roles::HEADING && aAttributes) {
+    // The heading level is an attribute, so we need that.
+    nsAutoString headingLevel;
+    if (aAttributes->GetAttribute(nsGkAtoms::level, headingLevel)) {
+      nsAutoString token(u"heading-");
+      token.Append(headingLevel);
+      if (LocalizeString(token, aRoleDescription)) {
+        return;
+      }
+    }
+  }
+
+  if ((aRole == roles::LANDMARK || aRole == roles::REGION) && aAttributes) {
+    nsAutoString xmlRoles;
+    if (aAttributes->GetAttribute(nsGkAtoms::xmlroles, xmlRoles)) {
+      nsWhitespaceTokenizer tokenizer(xmlRoles);
+      while (tokenizer.hasMoreTokens()) {
+        if (LocalizeString(tokenizer.nextToken(), aRoleDescription)) {
+          return;
+        }
+      }
+    }
+  }
+
+  GetAccService()->GetStringRole(aRole, aGeckoRole);
+  LocalizeString(aGeckoRole, aRoleDescription);
+}
+
+int32_t AccessibleWrap::AndroidClass(Accessible* aAccessible) {
+  return GetVirtualViewID(aAccessible) == SessionAccessibility::kNoID
+             ? java::SessionAccessibility::CLASSNAME_WEBVIEW
+             : GetAndroidClass(aAccessible->Role());
+}
+
+int32_t AccessibleWrap::GetVirtualViewID(Accessible* aAccessible) {
+  if (aAccessible->IsLocal()) {
+    return static_cast<AccessibleWrap*>(aAccessible)->mID;
+  }
+
+  return static_cast<int32_t>(aAccessible->AsRemote()->GetWrapper());
+}
+
+void AccessibleWrap::SetVirtualViewID(Accessible* aAccessible,
+                                      int32_t aVirtualViewID) {
+  if (aAccessible->IsLocal()) {
+    static_cast<AccessibleWrap*>(aAccessible)->mID = aVirtualViewID;
+  } else {
+    aAccessible->AsRemote()->SetWrapper(static_cast<uintptr_t>(aVirtualViewID));
+  }
+}
+
+int32_t AccessibleWrap::GetAndroidClass(role aRole) {
+#define ROLE(geckoRole, stringRole, ariaRole, atkRole, macRole, macSubrole, \
+             msaaRole, ia2Role, androidClass, nameRule)                     \
+  case roles::geckoRole:                                                    \
+    return androidClass;
+
+  switch (aRole) {
+#include "RoleMap.h"
+    default:
+      return java::SessionAccessibility::CLASSNAME_VIEW;
+  }
+
+#undef ROLE
+}
+
+int32_t AccessibleWrap::GetInputType(const nsString& aInputTypeAttr) {
+  if (aInputTypeAttr.EqualsIgnoreCase("email")) {
+    return java::sdk::InputType::TYPE_CLASS_TEXT |
+           java::sdk::InputType::TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS;
+  }
+
+  if (aInputTypeAttr.EqualsIgnoreCase("number")) {
+    return java::sdk::InputType::TYPE_CLASS_NUMBER;
+  }
+
+  if (aInputTypeAttr.EqualsIgnoreCase("password")) {
+    return java::sdk::InputType::TYPE_CLASS_TEXT |
+           java::sdk::InputType::TYPE_TEXT_VARIATION_WEB_PASSWORD;
+  }
+
+  if (aInputTypeAttr.EqualsIgnoreCase("tel")) {
+    return java::sdk::InputType::TYPE_CLASS_PHONE;
+  }
+
+  if (aInputTypeAttr.EqualsIgnoreCase("text")) {
+    return java::sdk::InputType::TYPE_CLASS_TEXT |
+           java::sdk::InputType::TYPE_TEXT_VARIATION_WEB_EDIT_TEXT;
+  }
+
+  if (aInputTypeAttr.EqualsIgnoreCase("url")) {
+    return java::sdk::InputType::TYPE_CLASS_TEXT |
+           java::sdk::InputType::TYPE_TEXT_VARIATION_URI;
+  }
+
+  return 0;
+}
+
+void AccessibleWrap::GetTextEquiv(nsString& aText) {
+  if (nsTextEquivUtils::HasNameRule(this, eNameFromSubtreeIfReqRule)) {
+    // This is an accessible that normally doesn't get its name from its
+    // subtree, so we collect the text equivalent explicitly.
+    nsTextEquivUtils::GetTextEquivFromSubtree(this, aText);
+  } else {
+    Name(aText);
+  }
+}
+
+bool AccessibleWrap::HandleLiveRegionEvent(AccEvent* aEvent) {
+  auto eventType = aEvent->GetEventType();
+  if (eventType != nsIAccessibleEvent::EVENT_TEXT_INSERTED &&
+      eventType != nsIAccessibleEvent::EVENT_NAME_CHANGE) {
+    // XXX: Right now only announce text inserted events. aria-relevant=removals
+    // is potentially on the chopping block[1]. We also don't support editable
+    // text because we currently can't descern the source of the change[2].
+    // 1. https://github.com/w3c/aria/issues/712
+    // 2. https://bugzilla.mozilla.org/show_bug.cgi?id=1531189
+    return false;
+  }
+
+  if (aEvent->IsFromUserInput()) {
+    return false;
+  }
+
+  RefPtr<AccAttributes> attributes = new AccAttributes();
+  nsAccUtils::SetLiveContainerAttributes(attributes, this);
+  nsString live;
+  if (!attributes->GetAttribute(nsGkAtoms::containerLive, live)) {
+    return false;
+  }
+
+  uint16_t priority = live.EqualsIgnoreCase("assertive")
+                          ? nsIAccessibleAnnouncementEvent::ASSERTIVE
+                          : nsIAccessibleAnnouncementEvent::POLITE;
+
+  Maybe<bool> atomic =
+      attributes->GetAttribute<bool>(nsGkAtoms::containerAtomic);
+  LocalAccessible* announcementTarget = this;
+  nsAutoString announcement;
+  if (atomic && *atomic) {
+    LocalAccessible* atomicAncestor = nullptr;
+    for (LocalAccessible* parent = announcementTarget; parent;
+         parent = parent->LocalParent()) {
+      dom::Element* element = parent->Elm();
+      if (element &&
+          nsAccUtils::ARIAAttrValueIs(element, nsGkAtoms::aria_atomic,
+                                      nsGkAtoms::_true, eCaseMatters)) {
+        atomicAncestor = parent;
+        break;
+      }
+    }
+
+    if (atomicAncestor) {
+      announcementTarget = atomicAncestor;
+      static_cast<AccessibleWrap*>(atomicAncestor)->GetTextEquiv(announcement);
+    }
+  } else {
+    GetTextEquiv(announcement);
+  }
+
+  announcement.CompressWhitespace();
+  if (announcement.IsEmpty()) {
+    return false;
+  }
+
+  announcementTarget->Announce(announcement, priority);
+  return true;
+}