Add m-esr52 at 52.6.0

1 files changed, 732 insertions, 0 deletions

diff --git a/accessible/generic/RootAccessible.cpp b/accessible/generic/RootAccessible.cpp
new file mode 100644
index 000000000..5817f2da9
--- /dev/null
+++ b/accessible/generic/RootAccessible.cpp
@@ -0,0 +1,732 @@
+/* -*- 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 "RootAccessible.h"
+
+#include "mozilla/ArrayUtils.h"
+
+#define CreateEvent CreateEventA
+#include "nsIDOMDocument.h"
+
+#include "Accessible-inl.h"
+#include "DocAccessible-inl.h"
+#include "nsAccessibilityService.h"
+#include "nsAccUtils.h"
+#include "nsCoreUtils.h"
+#include "nsEventShell.h"
+#include "Relation.h"
+#include "Role.h"
+#include "States.h"
+#ifdef MOZ_XUL
+#include "XULTreeAccessible.h"
+#endif
+
+#include "mozilla/dom/Element.h"
+
+#include "nsIDocShellTreeItem.h"
+#include "nsIDocShellTreeOwner.h"
+#include "mozilla/dom/Event.h"
+#include "mozilla/dom/EventTarget.h"
+#include "nsIDOMCustomEvent.h"
+#include "nsIDOMXULMultSelectCntrlEl.h"
+#include "nsIDocument.h"
+#include "nsIInterfaceRequestorUtils.h"
+#include "nsIPropertyBag2.h"
+#include "nsIServiceManager.h"
+#include "nsPIDOMWindow.h"
+#include "nsIWebBrowserChrome.h"
+#include "nsReadableUtils.h"
+#include "nsFocusManager.h"
+#include "nsGlobalWindow.h"
+
+#ifdef MOZ_XUL
+#include "nsIXULDocument.h"
+#include "nsIXULWindow.h"
+#endif
+
+using namespace mozilla;
+using namespace mozilla::a11y;
+using namespace mozilla::dom;
+
+////////////////////////////////////////////////////////////////////////////////
+// nsISupports
+
+NS_IMPL_ISUPPORTS_INHERITED0(RootAccessible, DocAccessible)
+
+////////////////////////////////////////////////////////////////////////////////
+// Constructor/destructor
+
+RootAccessible::
+  RootAccessible(nsIDocument* aDocument, nsIPresShell* aPresShell) :
+  DocAccessibleWrap(aDocument, aPresShell)
+{
+  mType = eRootType;
+}
+
+RootAccessible::~RootAccessible()
+{
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// Accessible
+
+ENameValueFlag
+RootAccessible::Name(nsString& aName)
+{
+  aName.Truncate();
+
+  if (ARIARoleMap()) {
+    Accessible::Name(aName);
+    if (!aName.IsEmpty())
+      return eNameOK;
+  }
+
+  mDocumentNode->GetTitle(aName);
+  return eNameOK;
+}
+
+role
+RootAccessible::NativeRole()
+{
+  // If it's a <dialog> or <wizard>, use roles::DIALOG instead
+  dom::Element* rootElm = mDocumentNode->GetRootElement();
+  if (rootElm && rootElm->IsAnyOfXULElements(nsGkAtoms::dialog,
+                                             nsGkAtoms::wizard))
+    return roles::DIALOG;
+
+  return DocAccessibleWrap::NativeRole();
+}
+
+// RootAccessible protected member
+#ifdef MOZ_XUL
+uint32_t
+RootAccessible::GetChromeFlags()
+{
+  // Return the flag set for the top level window as defined 
+  // by nsIWebBrowserChrome::CHROME_WINDOW_[FLAGNAME]
+  // Not simple: nsIXULWindow is not just a QI from nsIDOMWindow
+  nsCOMPtr<nsIDocShell> docShell = nsCoreUtils::GetDocShellFor(mDocumentNode);
+  NS_ENSURE_TRUE(docShell, 0);
+  nsCOMPtr<nsIDocShellTreeOwner> treeOwner;
+  docShell->GetTreeOwner(getter_AddRefs(treeOwner));
+  NS_ENSURE_TRUE(treeOwner, 0);
+  nsCOMPtr<nsIXULWindow> xulWin(do_GetInterface(treeOwner));
+  if (!xulWin) {
+    return 0;
+  }
+  uint32_t chromeFlags;
+  xulWin->GetChromeFlags(&chromeFlags);
+  return chromeFlags;
+}
+#endif
+
+uint64_t
+RootAccessible::NativeState()
+{
+  uint64_t state = DocAccessibleWrap::NativeState();
+  if (state & states::DEFUNCT)
+    return state;
+
+#ifdef MOZ_XUL
+  uint32_t chromeFlags = GetChromeFlags();
+  if (chromeFlags & nsIWebBrowserChrome::CHROME_WINDOW_RESIZE)
+    state |= states::SIZEABLE;
+    // If it has a titlebar it's movable
+    // XXX unless it's minimized or maximized, but not sure
+    //     how to detect that
+  if (chromeFlags & nsIWebBrowserChrome::CHROME_TITLEBAR)
+    state |= states::MOVEABLE;
+  if (chromeFlags & nsIWebBrowserChrome::CHROME_MODAL)
+    state |= states::MODAL;
+#endif
+
+  nsFocusManager* fm = nsFocusManager::GetFocusManager();
+  if (fm && fm->GetActiveWindow() == mDocumentNode->GetWindow())
+    state |= states::ACTIVE;
+
+  return state;
+}
+
+const char* const kEventTypes[] = {
+#ifdef DEBUG_DRAGDROPSTART
+  // Capture mouse over events and fire fake DRAGDROPSTART event to simplify
+  // debugging a11y objects with event viewers.
+  "mouseover",
+#endif
+  // Fired when list or tree selection changes.
+  "select",
+  // Fired when value changes immediately, wether or not focused changed.
+  "ValueChange",
+  "AlertActive",
+  "TreeRowCountChanged",
+  "TreeInvalidated",
+  // add ourself as a OpenStateChange listener (custom event fired in tree.xml)
+  "OpenStateChange",
+  // add ourself as a CheckboxStateChange listener (custom event fired in HTMLInputElement.cpp)
+  "CheckboxStateChange",
+  // add ourself as a RadioStateChange Listener ( custom event fired in in HTMLInputElement.cpp  & radio.xml)
+  "RadioStateChange",
+  "popupshown",
+  "popuphiding",
+  "DOMMenuInactive",
+  "DOMMenuItemActive",
+  "DOMMenuItemInactive",
+  "DOMMenuBarActive",
+  "DOMMenuBarInactive"
+};
+
+nsresult
+RootAccessible::AddEventListeners()
+{
+  // EventTarget interface allows to register event listeners to
+  // receive untrusted events (synthetic events generated by untrusted code).
+  // For example, XBL bindings implementations for elements that are hosted in
+  // non chrome document fire untrusted events.
+  nsCOMPtr<EventTarget> nstarget = mDocumentNode;
+
+  if (nstarget) {
+    for (const char* const* e = kEventTypes,
+                   * const* e_end = ArrayEnd(kEventTypes);
+         e < e_end; ++e) {
+      nsresult rv = nstarget->AddEventListener(NS_ConvertASCIItoUTF16(*e),
+                                               this, true, true, 2);
+      NS_ENSURE_SUCCESS(rv, rv);
+    }
+  }
+
+  return DocAccessible::AddEventListeners();
+}
+
+nsresult
+RootAccessible::RemoveEventListeners()
+{
+  nsCOMPtr<EventTarget> target = mDocumentNode;
+  if (target) { 
+    for (const char* const* e = kEventTypes,
+                   * const* e_end = ArrayEnd(kEventTypes);
+         e < e_end; ++e) {
+      nsresult rv = target->RemoveEventListener(NS_ConvertASCIItoUTF16(*e), this, true);
+      NS_ENSURE_SUCCESS(rv, rv);
+    }
+  }
+
+  // Do this before removing clearing caret accessible, so that it can use
+  // shutdown the caret accessible's selection listener
+  DocAccessible::RemoveEventListeners();
+  return NS_OK;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// public
+
+void
+RootAccessible::DocumentActivated(DocAccessible* aDocument)
+{
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// nsIDOMEventListener
+
+NS_IMETHODIMP
+RootAccessible::HandleEvent(nsIDOMEvent* aDOMEvent)
+{
+  MOZ_ASSERT(aDOMEvent);
+  Event* event = aDOMEvent->InternalDOMEvent();
+  nsCOMPtr<nsINode> origTargetNode = do_QueryInterface(event->GetOriginalTarget());
+  if (!origTargetNode)
+    return NS_OK;
+
+#ifdef A11Y_LOG
+  if (logging::IsEnabled(logging::eDOMEvents)) {
+    nsAutoString eventType;
+    aDOMEvent->GetType(eventType);
+    logging::DOMEvent("handled", origTargetNode, eventType);
+  }
+#endif
+
+  DocAccessible* document =
+    GetAccService()->GetDocAccessible(origTargetNode->OwnerDoc());
+
+  if (document) {
+    // Root accessible exists longer than any of its descendant documents so
+    // that we are guaranteed notification is processed before root accessible
+    // is destroyed.
+    document->HandleNotification<RootAccessible, nsIDOMEvent>
+      (this, &RootAccessible::ProcessDOMEvent, aDOMEvent);
+  }
+
+  return NS_OK;
+}
+
+// RootAccessible protected
+void
+RootAccessible::ProcessDOMEvent(nsIDOMEvent* aDOMEvent)
+{
+  MOZ_ASSERT(aDOMEvent);
+  Event* event = aDOMEvent->InternalDOMEvent();
+  nsCOMPtr<nsINode> origTargetNode = do_QueryInterface(event->GetOriginalTarget());
+
+  nsAutoString eventType;
+  aDOMEvent->GetType(eventType);
+
+#ifdef A11Y_LOG
+  if (logging::IsEnabled(logging::eDOMEvents))
+    logging::DOMEvent("processed", origTargetNode, eventType);
+#endif
+
+  if (eventType.EqualsLiteral("popuphiding")) {
+    HandlePopupHidingEvent(origTargetNode);
+    return;
+  }
+
+  DocAccessible* targetDocument = GetAccService()->
+    GetDocAccessible(origTargetNode->OwnerDoc());
+  NS_ASSERTION(targetDocument, "No document while accessible is in document?!");
+
+  Accessible* accessible = 
+    targetDocument->GetAccessibleOrContainer(origTargetNode);
+  if (!accessible)
+    return;
+
+#ifdef MOZ_XUL
+  XULTreeAccessible* treeAcc = accessible->AsXULTree();
+  if (treeAcc) {
+    if (eventType.EqualsLiteral("TreeRowCountChanged")) {
+      HandleTreeRowCountChangedEvent(aDOMEvent, treeAcc);
+      return;
+    }
+
+    if (eventType.EqualsLiteral("TreeInvalidated")) {
+      HandleTreeInvalidatedEvent(aDOMEvent, treeAcc);
+      return;
+    }
+  }
+#endif
+
+  if (eventType.EqualsLiteral("RadioStateChange")) {
+    uint64_t state = accessible->State();
+    bool isEnabled = (state & (states::CHECKED | states::SELECTED)) != 0;
+
+    if (accessible->NeedsDOMUIEvent()) {
+      RefPtr<AccEvent> accEvent =
+        new AccStateChangeEvent(accessible, states::CHECKED, isEnabled);
+      nsEventShell::FireEvent(accEvent);
+    }
+
+    if (isEnabled) {
+      FocusMgr()->ActiveItemChanged(accessible);
+#ifdef A11Y_LOG
+      if (logging::IsEnabled(logging::eFocus))
+        logging::ActiveItemChangeCausedBy("RadioStateChange", accessible);
+#endif
+    }
+
+    return;
+  }
+
+  if (eventType.EqualsLiteral("CheckboxStateChange")) {
+    if (accessible->NeedsDOMUIEvent()) {
+      uint64_t state = accessible->State();
+      bool isEnabled = !!(state & states::CHECKED);
+
+      RefPtr<AccEvent> accEvent =
+        new AccStateChangeEvent(accessible, states::CHECKED, isEnabled);
+      nsEventShell::FireEvent(accEvent);
+    }
+    return;
+  }
+
+  Accessible* treeItemAcc = nullptr;
+#ifdef MOZ_XUL
+  // If it's a tree element, need the currently selected item.
+  if (treeAcc) {
+    treeItemAcc = accessible->CurrentItem();
+    if (treeItemAcc)
+      accessible = treeItemAcc;
+  }
+
+  if (treeItemAcc && eventType.EqualsLiteral("OpenStateChange")) {
+    uint64_t state = accessible->State();
+    bool isEnabled = (state & states::EXPANDED) != 0;
+
+    RefPtr<AccEvent> accEvent =
+      new AccStateChangeEvent(accessible, states::EXPANDED, isEnabled);
+    nsEventShell::FireEvent(accEvent);
+    return;
+  }
+
+  nsINode* targetNode = accessible->GetNode();
+  if (treeItemAcc && eventType.EqualsLiteral("select")) {
+    // XXX: We shouldn't be based on DOM select event which doesn't provide us
+    // any context info. We should integrate into nsTreeSelection instead.
+    // If multiselect tree, we should fire selectionadd or selection removed
+    if (FocusMgr()->HasDOMFocus(targetNode)) {
+      nsCOMPtr<nsIDOMXULMultiSelectControlElement> multiSel =
+        do_QueryInterface(targetNode);
+      nsAutoString selType;
+      multiSel->GetSelType(selType);
+      if (selType.IsEmpty() || !selType.EqualsLiteral("single")) {
+        // XXX: We need to fire EVENT_SELECTION_ADD and EVENT_SELECTION_REMOVE
+        // for each tree item. Perhaps each tree item will need to cache its
+        // selection state and fire an event after a DOM "select" event when
+        // that state changes. XULTreeAccessible::UpdateTreeSelection();
+        nsEventShell::FireEvent(nsIAccessibleEvent::EVENT_SELECTION_WITHIN,
+                                accessible);
+        return;
+      }
+
+      RefPtr<AccSelChangeEvent> selChangeEvent =
+        new AccSelChangeEvent(treeAcc, treeItemAcc,
+                              AccSelChangeEvent::eSelectionAdd);
+      nsEventShell::FireEvent(selChangeEvent);
+      return;
+    }
+  }
+  else
+#endif
+  if (eventType.EqualsLiteral("AlertActive")) {
+    nsEventShell::FireEvent(nsIAccessibleEvent::EVENT_ALERT, accessible);
+  }
+  else if (eventType.EqualsLiteral("popupshown")) {
+    HandlePopupShownEvent(accessible);
+  }
+  else if (eventType.EqualsLiteral("DOMMenuInactive")) {
+    if (accessible->Role() == roles::MENUPOPUP) {
+      nsEventShell::FireEvent(nsIAccessibleEvent::EVENT_MENUPOPUP_END,
+                              accessible);
+    }
+  }
+  else if (eventType.EqualsLiteral("DOMMenuItemActive")) {
+    FocusMgr()->ActiveItemChanged(accessible);
+#ifdef A11Y_LOG
+    if (logging::IsEnabled(logging::eFocus))
+      logging::ActiveItemChangeCausedBy("DOMMenuItemActive", accessible);
+#endif
+  }
+  else if (eventType.EqualsLiteral("DOMMenuItemInactive")) {
+    // Process DOMMenuItemInactive event for autocomplete only because this is
+    // unique widget that may acquire focus from autocomplete popup while popup
+    // stays open and has no active item. In case of XUL tree autocomplete
+    // popup this event is fired for tree accessible.
+    Accessible* widget =
+      accessible->IsWidget() ? accessible : accessible->ContainerWidget();
+    if (widget && widget->IsAutoCompletePopup()) {
+      FocusMgr()->ActiveItemChanged(nullptr);
+#ifdef A11Y_LOG
+      if (logging::IsEnabled(logging::eFocus))
+        logging::ActiveItemChangeCausedBy("DOMMenuItemInactive", accessible);
+#endif
+    }
+  }
+  else if (eventType.EqualsLiteral("DOMMenuBarActive")) {  // Always from user input
+    nsEventShell::FireEvent(nsIAccessibleEvent::EVENT_MENU_START,
+                            accessible, eFromUserInput);
+
+    // Notify of active item change when menubar gets active and if it has
+    // current item. This is a case of mouseover (set current menuitem) and
+    // mouse click (activate the menubar). If menubar doesn't have current item
+    // (can be a case of menubar activation from keyboard) then ignore this
+    // notification because later we'll receive DOMMenuItemActive event after
+    // current menuitem is set.
+    Accessible* activeItem = accessible->CurrentItem();
+    if (activeItem) {
+      FocusMgr()->ActiveItemChanged(activeItem);
+#ifdef A11Y_LOG
+      if (logging::IsEnabled(logging::eFocus))
+        logging::ActiveItemChangeCausedBy("DOMMenuBarActive", accessible);
+#endif
+    }
+  }
+  else if (eventType.EqualsLiteral("DOMMenuBarInactive")) {  // Always from user input
+    nsEventShell::FireEvent(nsIAccessibleEvent::EVENT_MENU_END,
+                            accessible, eFromUserInput);
+
+    FocusMgr()->ActiveItemChanged(nullptr);
+#ifdef A11Y_LOG
+    if (logging::IsEnabled(logging::eFocus))
+      logging::ActiveItemChangeCausedBy("DOMMenuBarInactive", accessible);
+#endif
+  }
+  else if (accessible->NeedsDOMUIEvent() &&
+           eventType.EqualsLiteral("ValueChange")) {
+    uint32_t event = accessible->HasNumericValue()
+      ? nsIAccessibleEvent::EVENT_VALUE_CHANGE
+      : nsIAccessibleEvent::EVENT_TEXT_VALUE_CHANGE;
+     targetDocument->FireDelayedEvent(event, accessible);
+  }
+#ifdef DEBUG_DRAGDROPSTART
+  else if (eventType.EqualsLiteral("mouseover")) {
+    nsEventShell::FireEvent(nsIAccessibleEvent::EVENT_DRAGDROP_START,
+                            accessible);
+  }
+#endif
+}
+
+
+////////////////////////////////////////////////////////////////////////////////
+// Accessible
+
+void
+RootAccessible::Shutdown()
+{
+  // Called manually or by Accessible::LastRelease()
+  if (!PresShell())
+    return;  // Already shutdown
+
+  DocAccessibleWrap::Shutdown();
+}
+
+Relation
+RootAccessible::RelationByType(RelationType aType)
+{
+  if (!mDocumentNode || aType != RelationType::EMBEDS)
+    return DocAccessibleWrap::RelationByType(aType);
+
+  if (nsPIDOMWindowOuter* rootWindow = mDocumentNode->GetWindow()) {
+    nsCOMPtr<nsPIDOMWindowOuter> contentWindow = nsGlobalWindow::Cast(rootWindow)->GetContent();
+    if (contentWindow) {
+      nsCOMPtr<nsIDocument> contentDocumentNode = contentWindow->GetDoc();
+      if (contentDocumentNode) {
+        DocAccessible* contentDocument =
+          GetAccService()->GetDocAccessible(contentDocumentNode);
+        if (contentDocument)
+          return Relation(contentDocument);
+      }
+    }
+  }
+
+  return Relation();
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// Protected members
+
+void
+RootAccessible::HandlePopupShownEvent(Accessible* aAccessible)
+{
+  roles::Role role = aAccessible->Role();
+
+  if (role == roles::MENUPOPUP) {
+    // Don't fire menupopup events for combobox and autocomplete lists.
+    nsEventShell::FireEvent(nsIAccessibleEvent::EVENT_MENUPOPUP_START,
+                            aAccessible);
+    return;
+  }
+
+  if (role == roles::TOOLTIP) {
+    // There is a single <xul:tooltip> node which Mozilla moves around.
+    // The accessible for it stays the same no matter where it moves. 
+    // AT's expect to get an EVENT_SHOW for the tooltip. 
+    // In event callback the tooltip's accessible will be ready.
+    nsEventShell::FireEvent(nsIAccessibleEvent::EVENT_SHOW, aAccessible);
+    return;
+  }
+
+  if (role == roles::COMBOBOX_LIST) {
+    // Fire expanded state change event for comboboxes and autocompeletes.
+    Accessible* combobox = aAccessible->Parent();
+    if (!combobox)
+      return;
+
+    roles::Role comboboxRole = combobox->Role();
+    if (comboboxRole == roles::COMBOBOX || 
+	comboboxRole == roles::AUTOCOMPLETE) {
+      RefPtr<AccEvent> event =
+        new AccStateChangeEvent(combobox, states::EXPANDED, true);
+      if (event)
+        nsEventShell::FireEvent(event);
+    }
+  }
+}
+
+void
+RootAccessible::HandlePopupHidingEvent(nsINode* aPopupNode)
+{
+  // Get popup accessible. There are cases when popup element isn't accessible
+  // but an underlying widget is and behaves like popup, an example is
+  // autocomplete popups.
+  DocAccessible* document = nsAccUtils::GetDocAccessibleFor(aPopupNode);
+  if (!document)
+    return;
+
+  Accessible* popup = document->GetAccessible(aPopupNode);
+  if (!popup) {
+    Accessible* popupContainer = document->GetContainerAccessible(aPopupNode);
+    if (!popupContainer)
+      return;
+
+    uint32_t childCount = popupContainer->ChildCount();
+    for (uint32_t idx = 0; idx < childCount; idx++) {
+      Accessible* child = popupContainer->GetChildAt(idx);
+      if (child->IsAutoCompletePopup()) {
+        popup = child;
+        break;
+      }
+    }
+
+    // No popup no events. Focus is managed by DOM. This is a case for
+    // menupopups of menus on Linux since there are no accessible for popups.
+    if (!popup)
+      return;
+  }
+
+  // In case of autocompletes and comboboxes fire state change event for
+  // expanded state. Note, HTML form autocomplete isn't a subject of state
+  // change event because they aren't autocompletes strictly speaking.
+  // When popup closes (except nested popups and menus) then fire focus event to
+  // where it was. The focus event is expected even if popup didn't take a focus.
+
+  static const uint32_t kNotifyOfFocus = 1;
+  static const uint32_t kNotifyOfState = 2;
+  uint32_t notifyOf = 0;
+
+  // HTML select is target of popuphidding event. Otherwise get container
+  // widget. No container widget means this is either tooltip or menupopup.
+  // No events in the former case.
+  Accessible* widget = nullptr;
+  if (popup->IsCombobox()) {
+    widget = popup;
+  } else {
+    widget = popup->ContainerWidget();
+    if (!widget) {
+      if (!popup->IsMenuPopup())
+        return;
+
+      widget = popup;
+    }
+  }
+
+  if (popup->IsAutoCompletePopup()) {
+    // No focus event for autocomplete because it's managed by
+    // DOMMenuItemInactive events.
+    if (widget->IsAutoComplete())
+      notifyOf = kNotifyOfState;
+
+  } else if (widget->IsCombobox()) {
+    // Fire focus for active combobox, otherwise the focus is managed by DOM
+    // focus notifications. Always fire state change event.
+    if (widget->IsActiveWidget())
+      notifyOf = kNotifyOfFocus;
+    notifyOf |= kNotifyOfState;
+
+  } else if (widget->IsMenuButton()) {
+    // Can be a part of autocomplete.
+    Accessible* compositeWidget = widget->ContainerWidget();
+    if (compositeWidget && compositeWidget->IsAutoComplete()) {
+      widget = compositeWidget;
+      notifyOf = kNotifyOfState;
+    }
+
+    // Autocomplete (like searchbar) can be inactive when popup hiddens
+    notifyOf |= kNotifyOfFocus;
+
+  } else if (widget == popup) {
+    // Top level context menus and alerts.
+    // Ignore submenus and menubar. When submenu is closed then sumbenu
+    // container menuitem takes a focus via DOMMenuItemActive notification.
+    // For menubars processing we listen DOMMenubarActive/Inactive
+    // notifications.
+    notifyOf = kNotifyOfFocus;
+  }
+
+  // Restore focus to where it was.
+  if (notifyOf & kNotifyOfFocus) {
+    FocusMgr()->ActiveItemChanged(nullptr);
+#ifdef A11Y_LOG
+    if (logging::IsEnabled(logging::eFocus))
+      logging::ActiveItemChangeCausedBy("popuphiding", popup);
+#endif
+  }
+
+  // Fire expanded state change event.
+  if (notifyOf & kNotifyOfState) {
+    RefPtr<AccEvent> event =
+      new AccStateChangeEvent(widget, states::EXPANDED, false);
+    document->FireDelayedEvent(event);
+  }
+}
+
+#ifdef MOZ_XUL
+void
+RootAccessible::HandleTreeRowCountChangedEvent(nsIDOMEvent* aEvent,
+                                               XULTreeAccessible* aAccessible)
+{
+  nsCOMPtr<nsIDOMCustomEvent> customEvent(do_QueryInterface(aEvent));
+  if (!customEvent)
+    return;
+
+  nsCOMPtr<nsIVariant> detailVariant;
+  customEvent->GetDetail(getter_AddRefs(detailVariant));
+  if (!detailVariant)
+    return;
+
+  nsCOMPtr<nsISupports> supports;
+  detailVariant->GetAsISupports(getter_AddRefs(supports));
+  nsCOMPtr<nsIPropertyBag2> propBag(do_QueryInterface(supports));
+  if (!propBag)
+    return;
+
+  nsresult rv;
+  int32_t index, count;
+  rv = propBag->GetPropertyAsInt32(NS_LITERAL_STRING("index"), &index);
+  if (NS_FAILED(rv))
+    return;
+
+  rv = propBag->GetPropertyAsInt32(NS_LITERAL_STRING("count"), &count);
+  if (NS_FAILED(rv))
+    return;
+
+  aAccessible->InvalidateCache(index, count);
+}
+
+void
+RootAccessible::HandleTreeInvalidatedEvent(nsIDOMEvent* aEvent,
+                                           XULTreeAccessible* aAccessible)
+{
+  nsCOMPtr<nsIDOMCustomEvent> customEvent(do_QueryInterface(aEvent));
+  if (!customEvent)
+    return;
+
+  nsCOMPtr<nsIVariant> detailVariant;
+  customEvent->GetDetail(getter_AddRefs(detailVariant));
+  if (!detailVariant)
+    return;
+
+  nsCOMPtr<nsISupports> supports;
+  detailVariant->GetAsISupports(getter_AddRefs(supports));
+  nsCOMPtr<nsIPropertyBag2> propBag(do_QueryInterface(supports));
+  if (!propBag)
+    return;
+
+  int32_t startRow = 0, endRow = -1, startCol = 0, endCol = -1;
+  propBag->GetPropertyAsInt32(NS_LITERAL_STRING("startrow"),
+                              &startRow);
+  propBag->GetPropertyAsInt32(NS_LITERAL_STRING("endrow"),
+                              &endRow);
+  propBag->GetPropertyAsInt32(NS_LITERAL_STRING("startcolumn"),
+                              &startCol);
+  propBag->GetPropertyAsInt32(NS_LITERAL_STRING("endcolumn"),
+                              &endCol);
+
+  aAccessible->TreeViewInvalidated(startRow, endRow, startCol, endCol);
+}
+#endif
+
+ProxyAccessible*
+RootAccessible::GetPrimaryRemoteTopLevelContentDoc() const
+{
+  nsCOMPtr<nsIDocShellTreeOwner> owner;
+  mDocumentNode->GetDocShell()->GetTreeOwner(getter_AddRefs(owner));
+  NS_ENSURE_TRUE(owner, nullptr);
+
+  nsCOMPtr<nsITabParent> tabParent;
+  owner->GetPrimaryTabParent(getter_AddRefs(tabParent));
+  if (!tabParent) {
+    return nullptr;
+  }
+
+  auto tab = static_cast<dom::TabParent*>(tabParent.get());
+  return tab->GetTopLevelDocAccessible();
+}