Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

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

31 files changed, 5226 insertions, 0 deletions

diff --git a/accessible/atk/AccessibleWrap.cpp b/accessible/atk/AccessibleWrap.cpp
new file mode 100644
index 0000000000..050bec7fcd
--- /dev/null
+++ b/accessible/atk/AccessibleWrap.cpp
@@ -0,0 +1,1510 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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 "AccessibleWrap.h"
+
+#include "LocalAccessible-inl.h"
+#include "AccAttributes.h"
+#include "ApplicationAccessibleWrap.h"
+#include "InterfaceInitFuncs.h"
+#include "nsAccUtils.h"
+#include "mozilla/a11y/PDocAccessible.h"
+#include "OuterDocAccessible.h"
+#include "RemoteAccessible.h"
+#include "DocAccessibleParent.h"
+#include "RootAccessible.h"
+#include "mozilla/a11y/TableAccessible.h"
+#include "mozilla/a11y/TableCellAccessible.h"
+#include "nsMai.h"
+#include "nsMaiHyperlink.h"
+#include "nsString.h"
+#include "nsStateMap.h"
+#include "mozilla/a11y/Platform.h"
+#include "Relation.h"
+#include "RootAccessible.h"
+#include "States.h"
+#include "nsISimpleEnumerator.h"
+
+#include "mozilla/ArrayUtils.h"
+#include "mozilla/Sprintf.h"
+#include "nsAccessibilityService.h"
+#include "nsComponentManagerUtils.h"
+
+using namespace mozilla;
+using namespace mozilla::a11y;
+
+MaiAtkObject::EAvailableAtkSignals MaiAtkObject::gAvailableAtkSignals =
+    eUnknown;
+
+// defined in ApplicationAccessibleWrap.cpp
+extern "C" GType g_atk_hyperlink_impl_type;
+
+/* MaiAtkObject */
+
+enum {
+  ACTIVATE,
+  CREATE,
+  DEACTIVATE,
+  DESTROY,
+  MAXIMIZE,
+  MINIMIZE,
+  RESIZE,
+  RESTORE,
+  LAST_SIGNAL
+};
+
+enum MaiInterfaceType {
+  MAI_INTERFACE_COMPONENT, /* 0 */
+  MAI_INTERFACE_ACTION,
+  MAI_INTERFACE_VALUE,
+  MAI_INTERFACE_EDITABLE_TEXT,
+  MAI_INTERFACE_HYPERTEXT,
+  MAI_INTERFACE_HYPERLINK_IMPL,
+  MAI_INTERFACE_SELECTION,
+  MAI_INTERFACE_TABLE,
+  MAI_INTERFACE_TEXT,
+  MAI_INTERFACE_DOCUMENT,
+  MAI_INTERFACE_IMAGE, /* 10 */
+  MAI_INTERFACE_TABLE_CELL
+};
+
+static GType GetAtkTypeForMai(MaiInterfaceType type) {
+  switch (type) {
+    case MAI_INTERFACE_COMPONENT:
+      return ATK_TYPE_COMPONENT;
+    case MAI_INTERFACE_ACTION:
+      return ATK_TYPE_ACTION;
+    case MAI_INTERFACE_VALUE:
+      return ATK_TYPE_VALUE;
+    case MAI_INTERFACE_EDITABLE_TEXT:
+      return ATK_TYPE_EDITABLE_TEXT;
+    case MAI_INTERFACE_HYPERTEXT:
+      return ATK_TYPE_HYPERTEXT;
+    case MAI_INTERFACE_HYPERLINK_IMPL:
+      return g_atk_hyperlink_impl_type;
+    case MAI_INTERFACE_SELECTION:
+      return ATK_TYPE_SELECTION;
+    case MAI_INTERFACE_TABLE:
+      return ATK_TYPE_TABLE;
+    case MAI_INTERFACE_TEXT:
+      return ATK_TYPE_TEXT;
+    case MAI_INTERFACE_DOCUMENT:
+      return ATK_TYPE_DOCUMENT;
+    case MAI_INTERFACE_IMAGE:
+      return ATK_TYPE_IMAGE;
+    case MAI_INTERFACE_TABLE_CELL:
+      MOZ_ASSERT(false);
+  }
+  return G_TYPE_INVALID;
+}
+
+#define NON_USER_EVENT ":system"
+
+// The atk interfaces we can expose without checking what version of ATK we are
+// dealing with.  At the moment AtkTableCell is the only interface we can't
+// always expose.
+static const GInterfaceInfo atk_if_infos[] = {
+    {(GInterfaceInitFunc)componentInterfaceInitCB,
+     (GInterfaceFinalizeFunc) nullptr, nullptr},
+    {(GInterfaceInitFunc)actionInterfaceInitCB,
+     (GInterfaceFinalizeFunc) nullptr, nullptr},
+    {(GInterfaceInitFunc)valueInterfaceInitCB, (GInterfaceFinalizeFunc) nullptr,
+     nullptr},
+    {(GInterfaceInitFunc)editableTextInterfaceInitCB,
+     (GInterfaceFinalizeFunc) nullptr, nullptr},
+    {(GInterfaceInitFunc)hypertextInterfaceInitCB,
+     (GInterfaceFinalizeFunc) nullptr, nullptr},
+    {(GInterfaceInitFunc)hyperlinkImplInterfaceInitCB,
+     (GInterfaceFinalizeFunc) nullptr, nullptr},
+    {(GInterfaceInitFunc)selectionInterfaceInitCB,
+     (GInterfaceFinalizeFunc) nullptr, nullptr},
+    {(GInterfaceInitFunc)tableInterfaceInitCB, (GInterfaceFinalizeFunc) nullptr,
+     nullptr},
+    {(GInterfaceInitFunc)textInterfaceInitCB, (GInterfaceFinalizeFunc) nullptr,
+     nullptr},
+    {(GInterfaceInitFunc)documentInterfaceInitCB,
+     (GInterfaceFinalizeFunc) nullptr, nullptr},
+    {(GInterfaceInitFunc)imageInterfaceInitCB, (GInterfaceFinalizeFunc) nullptr,
+     nullptr}};
+
+static GQuark quark_mai_hyperlink = 0;
+
+AtkHyperlink* MaiAtkObject::GetAtkHyperlink() {
+  NS_ASSERTION(quark_mai_hyperlink, "quark_mai_hyperlink not initialized");
+  MaiHyperlink* maiHyperlink =
+      (MaiHyperlink*)g_object_get_qdata(G_OBJECT(this), quark_mai_hyperlink);
+  if (!maiHyperlink) {
+    maiHyperlink = new MaiHyperlink(acc);
+    g_object_set_qdata(G_OBJECT(this), quark_mai_hyperlink, maiHyperlink);
+  }
+
+  return maiHyperlink->GetAtkHyperlink();
+}
+
+void MaiAtkObject::Shutdown() {
+  acc = nullptr;
+  MaiHyperlink* maiHyperlink =
+      (MaiHyperlink*)g_object_get_qdata(G_OBJECT(this), quark_mai_hyperlink);
+  if (maiHyperlink) {
+    delete maiHyperlink;
+    g_object_set_qdata(G_OBJECT(this), quark_mai_hyperlink, nullptr);
+  }
+}
+
+struct MaiAtkObjectClass {
+  AtkObjectClass parent_class;
+};
+
+static guint mai_atk_object_signals[LAST_SIGNAL] = {
+    0,
+};
+
+static void MaybeFireNameChange(AtkObject* aAtkObj, const nsString& aNewName);
+
+G_BEGIN_DECLS
+/* callbacks for MaiAtkObject */
+static void classInitCB(AtkObjectClass* aClass);
+static void initializeCB(AtkObject* aAtkObj, gpointer aData);
+static void finalizeCB(GObject* aObj);
+
+/* callbacks for AtkObject virtual functions */
+static const gchar* getNameCB(AtkObject* aAtkObj);
+/* getDescriptionCB is also used by image interface */
+const gchar* getDescriptionCB(AtkObject* aAtkObj);
+static AtkRole getRoleCB(AtkObject* aAtkObj);
+static AtkAttributeSet* getAttributesCB(AtkObject* aAtkObj);
+static const gchar* GetLocaleCB(AtkObject*);
+static AtkObject* getParentCB(AtkObject* aAtkObj);
+static gint getChildCountCB(AtkObject* aAtkObj);
+static AtkObject* refChildCB(AtkObject* aAtkObj, gint aChildIndex);
+static gint getIndexInParentCB(AtkObject* aAtkObj);
+static AtkStateSet* refStateSetCB(AtkObject* aAtkObj);
+static AtkRelationSet* refRelationSetCB(AtkObject* aAtkObj);
+
+/* the missing atkobject virtual functions */
+/*
+  static AtkLayer            getLayerCB(AtkObject *aAtkObj);
+  static gint                getMdiZorderCB(AtkObject *aAtkObj);
+  static void                SetNameCB(AtkObject *aAtkObj,
+  const gchar *name);
+  static void                SetDescriptionCB(AtkObject *aAtkObj,
+  const gchar *description);
+  static void                SetParentCB(AtkObject *aAtkObj,
+  AtkObject *parent);
+  static void                SetRoleCB(AtkObject *aAtkObj,
+  AtkRole role);
+  static guint               ConnectPropertyChangeHandlerCB(
+  AtkObject  *aObj,
+  AtkPropertyChangeHandler *handler);
+  static void                RemovePropertyChangeHandlerCB(
+  AtkObject *aAtkObj,
+  guint handler_id);
+  static void                InitializeCB(AtkObject *aAtkObj,
+  gpointer data);
+  static void                ChildrenChangedCB(AtkObject *aAtkObj,
+  guint change_index,
+  gpointer changed_child);
+  static void                FocusEventCB(AtkObject *aAtkObj,
+  gboolean focus_in);
+  static void                PropertyChangeCB(AtkObject *aAtkObj,
+  AtkPropertyValues *values);
+  static void                StateChangeCB(AtkObject *aAtkObj,
+  const gchar *name,
+  gboolean state_set);
+  static void                VisibleDataChangedCB(AtkObject *aAtkObj);
+*/
+G_END_DECLS
+
+static GType GetMaiAtkType(uint16_t interfacesBits);
+static const char* GetUniqueMaiAtkTypeName(uint16_t interfacesBits);
+
+static gpointer parent_class = nullptr;
+
+GType mai_atk_object_get_type(void) {
+  static GType type = 0;
+
+  if (!type) {
+    static const GTypeInfo tinfo = {
+        sizeof(MaiAtkObjectClass),
+        (GBaseInitFunc) nullptr,
+        (GBaseFinalizeFunc) nullptr,
+        (GClassInitFunc)classInitCB,
+        (GClassFinalizeFunc) nullptr,
+        nullptr,              /* class data */
+        sizeof(MaiAtkObject), /* instance size */
+        0,                    /* nb preallocs */
+        (GInstanceInitFunc) nullptr,
+        nullptr /* value table */
+    };
+
+    type = g_type_register_static(ATK_TYPE_OBJECT, "MaiAtkObject", &tinfo,
+                                  GTypeFlags(0));
+    quark_mai_hyperlink = g_quark_from_static_string("MaiHyperlink");
+  }
+  return type;
+}
+
+AccessibleWrap::AccessibleWrap(nsIContent* aContent, DocAccessible* aDoc)
+    : LocalAccessible(aContent, aDoc), mAtkObject(nullptr) {}
+
+AccessibleWrap::~AccessibleWrap() {
+  NS_ASSERTION(!mAtkObject, "ShutdownAtkObject() is not called");
+}
+
+void AccessibleWrap::ShutdownAtkObject() {
+  if (!mAtkObject) return;
+
+  NS_ASSERTION(IS_MAI_OBJECT(mAtkObject), "wrong type of atk object");
+  if (IS_MAI_OBJECT(mAtkObject)) MAI_ATK_OBJECT(mAtkObject)->Shutdown();
+
+  g_object_unref(mAtkObject);
+  mAtkObject = nullptr;
+}
+
+void AccessibleWrap::Shutdown() {
+  ShutdownAtkObject();
+  LocalAccessible::Shutdown();
+}
+
+void AccessibleWrap::GetNativeInterface(void** aOutAccessible) {
+  *aOutAccessible = nullptr;
+
+  if (!mAtkObject) {
+    if (IsDefunct() || IsText()) {
+      // We don't create ATK objects for node which has been shutdown or
+      // plain text leaves
+      return;
+    }
+
+    GType type = GetMaiAtkType(CreateMaiInterfaces());
+    if (!type) return;
+
+    mAtkObject = reinterpret_cast<AtkObject*>(g_object_new(type, nullptr));
+    if (!mAtkObject) return;
+
+    atk_object_initialize(mAtkObject, static_cast<Accessible*>(this));
+    mAtkObject->role = ATK_ROLE_INVALID;
+    mAtkObject->layer = ATK_LAYER_INVALID;
+  }
+
+  *aOutAccessible = mAtkObject;
+}
+
+AtkObject* AccessibleWrap::GetAtkObject(void) {
+  void* atkObj = nullptr;
+  GetNativeInterface(&atkObj);
+  return static_cast<AtkObject*>(atkObj);
+}
+
+// Get AtkObject from LocalAccessible interface
+/* static */
+AtkObject* AccessibleWrap::GetAtkObject(LocalAccessible* acc) {
+  void* atkObjPtr = nullptr;
+  acc->GetNativeInterface(&atkObjPtr);
+  return atkObjPtr ? ATK_OBJECT(atkObjPtr) : nullptr;
+}
+
+/* private */
+uint16_t AccessibleWrap::CreateMaiInterfaces(void) {
+  uint16_t interfacesBits = 0;
+
+  // The Component interface is supported by all accessibles.
+  interfacesBits |= 1 << MAI_INTERFACE_COMPONENT;
+
+  // Add Action interface if the action count is more than zero.
+  if (ActionCount() > 0) interfacesBits |= 1 << MAI_INTERFACE_ACTION;
+
+  // Text, Editabletext, and Hypertext interface.
+  HyperTextAccessible* hyperText = AsHyperText();
+  if (hyperText && hyperText->IsTextRole()) {
+    interfacesBits |= 1 << MAI_INTERFACE_TEXT;
+    interfacesBits |= 1 << MAI_INTERFACE_EDITABLE_TEXT;
+    if (!nsAccUtils::MustPrune(this)) {
+      interfacesBits |= 1 << MAI_INTERFACE_HYPERTEXT;
+    }
+  }
+
+  // Value interface.
+  if (HasNumericValue()) interfacesBits |= 1 << MAI_INTERFACE_VALUE;
+
+  // Document interface.
+  if (IsDoc()) interfacesBits |= 1 << MAI_INTERFACE_DOCUMENT;
+
+  if (IsImage()) interfacesBits |= 1 << MAI_INTERFACE_IMAGE;
+
+  // HyperLink interface.
+  if (IsLink()) interfacesBits |= 1 << MAI_INTERFACE_HYPERLINK_IMPL;
+
+  if (!nsAccUtils::MustPrune(this)) {  // These interfaces require children
+    // Table interface.
+    if (AsTable()) interfacesBits |= 1 << MAI_INTERFACE_TABLE;
+
+    if (AsTableCell()) interfacesBits |= 1 << MAI_INTERFACE_TABLE_CELL;
+
+    // Selection interface.
+    if (IsSelect()) {
+      interfacesBits |= 1 << MAI_INTERFACE_SELECTION;
+    }
+  }
+
+  return interfacesBits;
+}
+
+static GType GetMaiAtkType(uint16_t interfacesBits) {
+  GType type;
+  static const GTypeInfo tinfo = {
+      sizeof(MaiAtkObjectClass),
+      (GBaseInitFunc) nullptr,
+      (GBaseFinalizeFunc) nullptr,
+      (GClassInitFunc) nullptr,
+      (GClassFinalizeFunc) nullptr,
+      nullptr,              /* class data */
+      sizeof(MaiAtkObject), /* instance size */
+      0,                    /* nb preallocs */
+      (GInstanceInitFunc) nullptr,
+      nullptr /* value table */
+  };
+
+  /*
+   * The members we use to register GTypes are GetAtkTypeForMai
+   * and atk_if_infos, which are constant values to each MaiInterface
+   * So we can reuse the registered GType when having
+   * the same MaiInterface types.
+   */
+  const char* atkTypeName = GetUniqueMaiAtkTypeName(interfacesBits);
+  type = g_type_from_name(atkTypeName);
+  if (type) {
+    return type;
+  }
+
+  /*
+   * gobject limits the number of types that can directly derive from any
+   * given object type to 4095.
+   */
+  static uint16_t typeRegCount = 0;
+  if (typeRegCount++ >= 4095) {
+    return G_TYPE_INVALID;
+  }
+  type = g_type_register_static(MAI_TYPE_ATK_OBJECT, atkTypeName, &tinfo,
+                                GTypeFlags(0));
+
+  for (uint32_t index = 0; index < ArrayLength(atk_if_infos); index++) {
+    if (interfacesBits & (1 << index)) {
+      g_type_add_interface_static(type,
+                                  GetAtkTypeForMai((MaiInterfaceType)index),
+                                  &atk_if_infos[index]);
+    }
+  }
+
+  // Special case AtkTableCell so we can check what version of Atk we are
+  // dealing with.
+  if (IsAtkVersionAtLeast(2, 12) &&
+      (interfacesBits & (1 << MAI_INTERFACE_TABLE_CELL))) {
+    const GInterfaceInfo cellInfo = {
+        (GInterfaceInitFunc)tableCellInterfaceInitCB,
+        (GInterfaceFinalizeFunc) nullptr, nullptr};
+    g_type_add_interface_static(type, gAtkTableCellGetTypeFunc(), &cellInfo);
+  }
+
+  return type;
+}
+
+static const char* GetUniqueMaiAtkTypeName(uint16_t interfacesBits) {
+#define MAI_ATK_TYPE_NAME_LEN (30) /* 10+sizeof(uint16_t)*8/4+1 < 30 */
+
+  static gchar namePrefix[] = "MaiAtkType"; /* size = 10 */
+  static gchar name[MAI_ATK_TYPE_NAME_LEN + 1];
+
+  SprintfLiteral(name, "%s%x", namePrefix, interfacesBits);
+  name[MAI_ATK_TYPE_NAME_LEN] = '\0';
+
+  return name;
+}
+
+bool AccessibleWrap::IsValidObject() {
+  // to ensure we are not shut down
+  return !IsDefunct();
+}
+
+/* static functions for ATK callbacks */
+void classInitCB(AtkObjectClass* aClass) {
+  GObjectClass* gobject_class = G_OBJECT_CLASS(aClass);
+
+  parent_class = g_type_class_peek_parent(aClass);
+
+  aClass->get_name = getNameCB;
+  aClass->get_description = getDescriptionCB;
+  aClass->get_parent = getParentCB;
+  aClass->get_n_children = getChildCountCB;
+  aClass->ref_child = refChildCB;
+  aClass->get_index_in_parent = getIndexInParentCB;
+  aClass->get_role = getRoleCB;
+  aClass->get_attributes = getAttributesCB;
+  aClass->get_object_locale = GetLocaleCB;
+  aClass->ref_state_set = refStateSetCB;
+  aClass->ref_relation_set = refRelationSetCB;
+
+  aClass->initialize = initializeCB;
+
+  gobject_class->finalize = finalizeCB;
+
+  mai_atk_object_signals[ACTIVATE] = g_signal_new(
+      "activate", MAI_TYPE_ATK_OBJECT, G_SIGNAL_RUN_LAST,
+      0, /* default signal handler */
+      nullptr, nullptr, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
+  mai_atk_object_signals[CREATE] = g_signal_new(
+      "create", MAI_TYPE_ATK_OBJECT, G_SIGNAL_RUN_LAST,
+      0, /* default signal handler */
+      nullptr, nullptr, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
+  mai_atk_object_signals[DEACTIVATE] = g_signal_new(
+      "deactivate", MAI_TYPE_ATK_OBJECT, G_SIGNAL_RUN_LAST,
+      0, /* default signal handler */
+      nullptr, nullptr, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
+  mai_atk_object_signals[DESTROY] = g_signal_new(
+      "destroy", MAI_TYPE_ATK_OBJECT, G_SIGNAL_RUN_LAST,
+      0, /* default signal handler */
+      nullptr, nullptr, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
+  mai_atk_object_signals[MAXIMIZE] = g_signal_new(
+      "maximize", MAI_TYPE_ATK_OBJECT, G_SIGNAL_RUN_LAST,
+      0, /* default signal handler */
+      nullptr, nullptr, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
+  mai_atk_object_signals[MINIMIZE] = g_signal_new(
+      "minimize", MAI_TYPE_ATK_OBJECT, G_SIGNAL_RUN_LAST,
+      0, /* default signal handler */
+      nullptr, nullptr, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
+  mai_atk_object_signals[RESIZE] = g_signal_new(
+      "resize", MAI_TYPE_ATK_OBJECT, G_SIGNAL_RUN_LAST,
+      0, /* default signal handler */
+      nullptr, nullptr, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
+  mai_atk_object_signals[RESTORE] = g_signal_new(
+      "restore", MAI_TYPE_ATK_OBJECT, G_SIGNAL_RUN_LAST,
+      0, /* default signal handler */
+      nullptr, nullptr, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
+}
+
+void initializeCB(AtkObject* aAtkObj, gpointer aData) {
+  NS_ASSERTION((IS_MAI_OBJECT(aAtkObj)), "Invalid AtkObject");
+  NS_ASSERTION(aData, "Invalid Data to init AtkObject");
+  if (!aAtkObj || !aData) return;
+
+  /* call parent init function */
+  /* AtkObjectClass has not a "initialize" function now,
+   * maybe it has later
+   */
+
+  if (ATK_OBJECT_CLASS(parent_class)->initialize) {
+    ATK_OBJECT_CLASS(parent_class)->initialize(aAtkObj, aData);
+  }
+
+  /* initialize object */
+  MAI_ATK_OBJECT(aAtkObj)->acc = static_cast<Accessible*>(aData);
+}
+
+void finalizeCB(GObject* aObj) {
+  if (!IS_MAI_OBJECT(aObj)) return;
+  NS_ASSERTION(!MAI_ATK_OBJECT(aObj)->acc, "acc NOT null");
+
+  // call parent finalize function
+  // finalize of GObjectClass will unref the accessible parent if has
+  if (G_OBJECT_CLASS(parent_class)->finalize) {
+    G_OBJECT_CLASS(parent_class)->finalize(aObj);
+  }
+}
+
+const gchar* getNameCB(AtkObject* aAtkObj) {
+  nsAutoString name;
+  if (Accessible* acc = GetInternalObj(aAtkObj)) {
+    acc->Name(name);
+  } else {
+    return nullptr;
+  }
+
+  // XXX Firing an event from here does not seem right
+  MaybeFireNameChange(aAtkObj, name);
+
+  return aAtkObj->name;
+}
+
+static void MaybeFireNameChange(AtkObject* aAtkObj, const nsString& aNewName) {
+  NS_ConvertUTF16toUTF8 newNameUTF8(aNewName);
+  if (aAtkObj->name && !strcmp(aAtkObj->name, newNameUTF8.get())) return;
+
+  // Below we duplicate the functionality of atk_object_set_name(),
+  // but without calling atk_object_get_name(). Instead of
+  // atk_object_get_name() we directly access aAtkObj->name. This is because
+  // atk_object_get_name() would call getNameCB() which would call
+  // MaybeFireNameChange() (or atk_object_set_name() before this problem was
+  // fixed) and we would get an infinite recursion.
+  // See http://bugzilla.mozilla.org/733712
+
+  // Do not notify for initial name setting.
+  // See bug http://bugzilla.gnome.org/665870
+  bool notify = !!aAtkObj->name;
+
+  free(aAtkObj->name);
+  aAtkObj->name = strdup(newNameUTF8.get());
+
+  if (notify) g_object_notify(G_OBJECT(aAtkObj), "accessible-name");
+}
+
+const gchar* getDescriptionCB(AtkObject* aAtkObj) {
+  nsAutoString uniDesc;
+  if (Accessible* acc = GetInternalObj(aAtkObj)) {
+    acc->Description(uniDesc);
+  } else {
+    return nullptr;
+  }
+
+  NS_ConvertUTF8toUTF16 objDesc(aAtkObj->description);
+  if (!uniDesc.Equals(objDesc)) {
+    atk_object_set_description(aAtkObj, NS_ConvertUTF16toUTF8(uniDesc).get());
+  }
+
+  return aAtkObj->description;
+}
+
+AtkRole getRoleCB(AtkObject* aAtkObj) {
+  if (aAtkObj->role != ATK_ROLE_INVALID) return aAtkObj->role;
+
+  Accessible* acc = GetInternalObj(aAtkObj);
+  if (!acc) {
+    return ATK_ROLE_INVALID;
+  }
+
+#ifdef DEBUG
+  if (AccessibleWrap* accWrap = GetAccessibleWrap(aAtkObj)) {
+    NS_ASSERTION(nsAccUtils::IsTextInterfaceSupportCorrect(accWrap),
+                 "Does not support Text interface when it should");
+  }
+#endif
+
+#define ROLE(geckoRole, stringRole, ariaRole, atkRole, macRole, macSubrole, \
+             msaaRole, ia2Role, androidClass, nameRule)                     \
+  case roles::geckoRole:                                                    \
+    aAtkObj->role = atkRole;                                                \
+    break;
+
+  switch (acc->Role()) {
+#include "RoleMap.h"
+    default:
+      MOZ_CRASH("Unknown role.");
+  }
+
+#undef ROLE
+
+  if (aAtkObj->role == ATK_ROLE_LIST_BOX && !IsAtkVersionAtLeast(2, 1)) {
+    aAtkObj->role = ATK_ROLE_LIST;
+  } else if (aAtkObj->role == ATK_ROLE_TABLE_ROW &&
+             !IsAtkVersionAtLeast(2, 1)) {
+    aAtkObj->role = ATK_ROLE_LIST_ITEM;
+  } else if (aAtkObj->role == ATK_ROLE_MATH && !IsAtkVersionAtLeast(2, 12)) {
+    aAtkObj->role = ATK_ROLE_SECTION;
+  } else if (aAtkObj->role == ATK_ROLE_COMMENT && !IsAtkVersionAtLeast(2, 12)) {
+    aAtkObj->role = ATK_ROLE_SECTION;
+  } else if (aAtkObj->role == ATK_ROLE_LANDMARK &&
+             !IsAtkVersionAtLeast(2, 12)) {
+    aAtkObj->role = ATK_ROLE_SECTION;
+  } else if (aAtkObj->role == ATK_ROLE_FOOTNOTE &&
+             !IsAtkVersionAtLeast(2, 25, 2)) {
+    aAtkObj->role = ATK_ROLE_SECTION;
+  } else if (aAtkObj->role == ATK_ROLE_STATIC && !IsAtkVersionAtLeast(2, 16)) {
+    aAtkObj->role = ATK_ROLE_TEXT;
+  } else if ((aAtkObj->role == ATK_ROLE_MATH_FRACTION ||
+              aAtkObj->role == ATK_ROLE_MATH_ROOT) &&
+             !IsAtkVersionAtLeast(2, 16)) {
+    aAtkObj->role = ATK_ROLE_SECTION;
+  } else if (aAtkObj->role == ATK_ROLE_MARK && !IsAtkVersionAtLeast(2, 36)) {
+    aAtkObj->role = ATK_ROLE_TEXT;
+  } else if (aAtkObj->role == ATK_ROLE_SUGGESTION &&
+             !IsAtkVersionAtLeast(2, 36)) {
+    aAtkObj->role = ATK_ROLE_SECTION;
+  } else if (aAtkObj->role == ATK_ROLE_COMMENT && !IsAtkVersionAtLeast(2, 36)) {
+    aAtkObj->role = ATK_ROLE_SECTION;
+  } else if ((aAtkObj->role == ATK_ROLE_CONTENT_DELETION ||
+              aAtkObj->role == ATK_ROLE_CONTENT_INSERTION) &&
+             !IsAtkVersionAtLeast(2, 34)) {
+    aAtkObj->role = ATK_ROLE_SECTION;
+  }
+
+  return aAtkObj->role;
+}
+
+static AtkAttributeSet* ConvertToAtkAttributeSet(AccAttributes* aAttributes) {
+  if (!aAttributes) {
+    return nullptr;
+  }
+
+  AtkAttributeSet* objAttributeSet = nullptr;
+
+  for (auto iter : *aAttributes) {
+    nsAutoString name;
+    iter.NameAsString(name);
+    if (name.Equals(u"placeholder")) {
+      name.AssignLiteral(u"placeholder-text");
+    }
+
+    nsAutoString value;
+    iter.ValueAsString(value);
+
+    AtkAttribute* objAttr = (AtkAttribute*)g_malloc(sizeof(AtkAttribute));
+    objAttr->name = g_strdup(NS_ConvertUTF16toUTF8(name).get());
+    objAttr->value = g_strdup(NS_ConvertUTF16toUTF8(value).get());
+    objAttributeSet = g_slist_prepend(objAttributeSet, objAttr);
+  }
+
+  // libspi will free it
+  return objAttributeSet;
+}
+
+AtkAttributeSet* getAttributesCB(AtkObject* aAtkObj) {
+  Accessible* acc = GetInternalObj(aAtkObj);
+  if (!acc) {
+    return nullptr;
+  }
+  RefPtr<AccAttributes> attributes = acc->Attributes();
+  return ConvertToAtkAttributeSet(attributes);
+}
+
+const gchar* GetLocaleCB(AtkObject* aAtkObj) {
+  Accessible* acc = GetInternalObj(aAtkObj);
+  if (!acc) {
+    return nullptr;
+  }
+
+  nsAutoString locale;
+  acc->Language(locale);
+  return AccessibleWrap::ReturnString(locale);
+}
+
+AtkObject* getParentCB(AtkObject* aAtkObj) {
+  if (aAtkObj->accessible_parent) return aAtkObj->accessible_parent;
+
+  Accessible* acc = GetInternalObj(aAtkObj);
+  if (!acc) {
+    return nullptr;
+  }
+
+  Accessible* parent = acc->Parent();
+  AtkObject* atkParent = parent ? GetWrapperFor(parent) : nullptr;
+  if (atkParent) atk_object_set_parent(aAtkObj, atkParent);
+
+  return aAtkObj->accessible_parent;
+}
+
+gint getChildCountCB(AtkObject* aAtkObj) {
+  Accessible* acc = GetInternalObj(aAtkObj);
+  if (!acc || nsAccUtils::MustPrune(acc)) {
+    return 0;
+  }
+  return static_cast<gint>(acc->EmbeddedChildCount());
+}
+
+AtkObject* refChildCB(AtkObject* aAtkObj, gint aChildIndex) {
+  // aChildIndex should not be less than zero
+  if (aChildIndex < 0) {
+    return nullptr;
+  }
+
+  Accessible* acc = GetInternalObj(aAtkObj);
+  if (!acc || nsAccUtils::MustPrune(acc)) {
+    return nullptr;
+  }
+  Accessible* accChild = acc->EmbeddedChildAt(aChildIndex);
+  if (!accChild) {
+    return nullptr;
+  }
+
+  AtkObject* childAtkObj = GetWrapperFor(accChild);
+  NS_ASSERTION(childAtkObj, "Fail to get AtkObj");
+  if (!childAtkObj) {
+    return nullptr;
+  }
+
+  g_object_ref(childAtkObj);
+
+  if (aAtkObj != childAtkObj->accessible_parent) {
+    atk_object_set_parent(childAtkObj, aAtkObj);
+  }
+
+  return childAtkObj;
+}
+
+gint getIndexInParentCB(AtkObject* aAtkObj) {
+  // We don't use LocalAccessible::IndexInParent() because we don't include text
+  // leaf nodes as children in ATK.
+  Accessible* acc = GetInternalObj(aAtkObj);
+  if (!acc) {
+    return -1;
+  }
+  if (acc->IsDoc()) {
+    return 0;
+  }
+  Accessible* parent = acc->Parent();
+  if (!parent) {
+    return -1;
+  }
+  return parent->IndexOfEmbeddedChild(acc);
+}
+
+static void TranslateStates(uint64_t aState, roles::Role aRole,
+                            AtkStateSet* aStateSet) {
+  // atk doesn't have a read only state so read only things shouldn't be
+  // editable. However, we don't do this for list items because Gecko always
+  // exposes those as read only.
+  if ((aState & states::READONLY) && aRole != roles::LISTITEM) {
+    aState &= ~states::EDITABLE;
+  }
+
+  // Convert every state to an entry in AtkStateMap
+  uint64_t bitMask = 1;
+  for (auto stateIndex = 0U; stateIndex < gAtkStateMapLen; stateIndex++) {
+    if (gAtkStateMap[stateIndex]
+            .atkState) {  // There's potentially an ATK state for this
+      bool isStateOn = (aState & bitMask) != 0;
+      if (gAtkStateMap[stateIndex].stateMapEntryType == kMapOpposite) {
+        isStateOn = !isStateOn;
+      }
+      if (isStateOn) {
+        atk_state_set_add_state(aStateSet, gAtkStateMap[stateIndex].atkState);
+      }
+    }
+    bitMask <<= 1;
+  }
+}
+
+AtkStateSet* refStateSetCB(AtkObject* aAtkObj) {
+  AtkStateSet* state_set = nullptr;
+  state_set = ATK_OBJECT_CLASS(parent_class)->ref_state_set(aAtkObj);
+
+  if (Accessible* acc = GetInternalObj(aAtkObj)) {
+    TranslateStates(acc->State(), acc->Role(), state_set);
+  } else {
+    TranslateStates(states::DEFUNCT, roles::NOTHING, state_set);
+  }
+
+  return state_set;
+}
+
+static void UpdateAtkRelation(RelationType aType, Accessible* aAcc,
+                              AtkRelationType aAtkType,
+                              AtkRelationSet* aAtkSet) {
+  if (aAtkType == ATK_RELATION_NULL) return;
+
+  AtkRelation* atkRelation =
+      atk_relation_set_get_relation_by_type(aAtkSet, aAtkType);
+  if (atkRelation) atk_relation_set_remove(aAtkSet, atkRelation);
+
+  Relation rel(aAcc->RelationByType(aType));
+  nsTArray<AtkObject*> targets;
+  Accessible* tempAcc = nullptr;
+  while ((tempAcc = rel.Next())) {
+    targets.AppendElement(GetWrapperFor(tempAcc));
+  }
+
+  if (targets.Length()) {
+    atkRelation =
+        atk_relation_new(targets.Elements(), targets.Length(), aAtkType);
+    atk_relation_set_add(aAtkSet, atkRelation);
+    g_object_unref(atkRelation);
+  }
+}
+
+AtkRelationSet* refRelationSetCB(AtkObject* aAtkObj) {
+  AtkRelationSet* relation_set =
+      ATK_OBJECT_CLASS(parent_class)->ref_relation_set(aAtkObj);
+
+  Accessible* acc = GetInternalObj(aAtkObj);
+  if (!acc) {
+    return relation_set;
+  }
+
+#define RELATIONTYPE(geckoType, geckoTypeName, atkType, msaaType, ia2Type) \
+  UpdateAtkRelation(RelationType::geckoType, acc, atkType, relation_set);
+
+#include "RelationTypeMap.h"
+
+#undef RELATIONTYPE
+
+  return relation_set;
+}
+
+// Check if aAtkObj is a valid MaiAtkObject, and return the AccessibleWrap
+// for it.
+AccessibleWrap* GetAccessibleWrap(AtkObject* aAtkObj) {
+  NS_ENSURE_TRUE(IS_MAI_OBJECT(aAtkObj), nullptr);
+
+  // If we're working with an ATK object, we need to convert the Accessible
+  // back to an AccessibleWrap:
+  Accessible* storedAcc = MAI_ATK_OBJECT(aAtkObj)->acc;
+  if (!storedAcc) {
+    return nullptr;
+  }
+  auto* accWrap = static_cast<AccessibleWrap*>(storedAcc->AsLocal());
+
+  // Check if the accessible was deconstructed.
+  if (!accWrap) return nullptr;
+
+  NS_ENSURE_TRUE(accWrap->GetAtkObject() == aAtkObj, nullptr);
+
+  AccessibleWrap* appAccWrap = ApplicationAcc();
+  if (appAccWrap != accWrap && !accWrap->IsValidObject()) {
+    return nullptr;
+  }
+
+  return accWrap;
+}
+
+RemoteAccessible* GetProxy(AtkObject* aObj) {
+  Accessible* acc = GetInternalObj(aObj);
+  if (!acc) {
+    return nullptr;
+  }
+
+  return acc->AsRemote();
+}
+
+Accessible* GetInternalObj(AtkObject* aObj) {
+  if (!aObj || !IS_MAI_OBJECT(aObj)) return nullptr;
+
+  return MAI_ATK_OBJECT(aObj)->acc;
+}
+
+AtkObject* GetWrapperFor(Accessible* aAcc) {
+  if (!aAcc) {
+    return nullptr;
+  }
+
+  if (aAcc->IsRemote()) {
+    return reinterpret_cast<AtkObject*>(aAcc->AsRemote()->GetWrapper());
+  }
+
+  return AccessibleWrap::GetAtkObject(aAcc->AsLocal());
+}
+
+static uint16_t GetInterfacesForProxy(RemoteAccessible* aProxy) {
+  uint16_t interfaces = 1 << MAI_INTERFACE_COMPONENT;
+  if (aProxy->IsHyperText()) {
+    interfaces |= (1 << MAI_INTERFACE_HYPERTEXT) | (1 << MAI_INTERFACE_TEXT) |
+                  (1 << MAI_INTERFACE_EDITABLE_TEXT);
+  }
+
+  if (aProxy->IsLink()) {
+    interfaces |= 1 << MAI_INTERFACE_HYPERLINK_IMPL;
+  }
+
+  if (aProxy->HasNumericValue()) {
+    interfaces |= 1 << MAI_INTERFACE_VALUE;
+  }
+
+  if (aProxy->IsTable()) {
+    interfaces |= 1 << MAI_INTERFACE_TABLE;
+  }
+
+  if (aProxy->IsTableCell()) {
+    interfaces |= 1 << MAI_INTERFACE_TABLE_CELL;
+  }
+
+  if (aProxy->IsImage()) {
+    interfaces |= 1 << MAI_INTERFACE_IMAGE;
+  }
+
+  if (aProxy->IsDoc()) {
+    interfaces |= 1 << MAI_INTERFACE_DOCUMENT;
+  }
+
+  if (aProxy->IsSelect()) {
+    interfaces |= 1 << MAI_INTERFACE_SELECTION;
+  }
+
+  if (aProxy->IsActionable()) {
+    interfaces |= 1 << MAI_INTERFACE_ACTION;
+  }
+
+  return interfaces;
+}
+
+void a11y::ProxyCreated(RemoteAccessible* aProxy) {
+  MOZ_ASSERT(aProxy->RemoteParent() || aProxy->IsDoc(),
+             "Need parent to check for HyperLink interface");
+  GType type = GetMaiAtkType(GetInterfacesForProxy(aProxy));
+  NS_ASSERTION(type, "why don't we have a type!");
+
+  AtkObject* obj = reinterpret_cast<AtkObject*>(g_object_new(type, nullptr));
+  if (!obj) return;
+
+  atk_object_initialize(obj, static_cast<Accessible*>(aProxy));
+  obj->role = ATK_ROLE_INVALID;
+  obj->layer = ATK_LAYER_INVALID;
+  aProxy->SetWrapper(reinterpret_cast<uintptr_t>(obj));
+}
+
+void a11y::ProxyDestroyed(RemoteAccessible* aProxy) {
+  auto obj = reinterpret_cast<MaiAtkObject*>(aProxy->GetWrapper());
+  if (!obj) {
+    return;
+  }
+
+  obj->Shutdown();
+  g_object_unref(obj);
+  aProxy->SetWrapper(0);
+}
+
+nsresult AccessibleWrap::HandleAccEvent(AccEvent* aEvent) {
+  nsresult rv = LocalAccessible::HandleAccEvent(aEvent);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  if (IPCAccessibilityActive()) {
+    return NS_OK;
+  }
+
+  LocalAccessible* accessible = aEvent->GetAccessible();
+  NS_ENSURE_TRUE(accessible, NS_ERROR_FAILURE);
+
+  // 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()) return NS_OK;
+
+  uint32_t type = aEvent->GetEventType();
+
+  AtkObject* atkObj = AccessibleWrap::GetAtkObject(accessible);
+
+  // We don't create ATK objects for plain text leaves, just return NS_OK in
+  // such case.
+  if (!atkObj) {
+    NS_ASSERTION(type == nsIAccessibleEvent::EVENT_SHOW ||
+                     type == nsIAccessibleEvent::EVENT_HIDE,
+                 "Event other than SHOW and HIDE fired for plain text leaves");
+    return NS_OK;
+  }
+
+  AccessibleWrap* accWrap = GetAccessibleWrap(atkObj);
+  if (!accWrap) {
+    return NS_OK;  // Node is shut down
+  }
+
+  switch (type) {
+    case nsIAccessibleEvent::EVENT_STATE_CHANGE: {
+      AccStateChangeEvent* event = downcast_accEvent(aEvent);
+      MAI_ATK_OBJECT(atkObj)->FireStateChangeEvent(event->GetState(),
+                                                   event->IsStateEnabled());
+      break;
+    }
+
+    case nsIAccessibleEvent::EVENT_TEXT_REMOVED:
+    case nsIAccessibleEvent::EVENT_TEXT_INSERTED: {
+      AccTextChangeEvent* event = downcast_accEvent(aEvent);
+      NS_ENSURE_TRUE(event, NS_ERROR_FAILURE);
+
+      MAI_ATK_OBJECT(atkObj)->FireTextChangeEvent(
+          event->ModifiedText(), event->GetStartOffset(), event->GetLength(),
+          event->IsTextInserted(), event->IsFromUserInput());
+
+      return NS_OK;
+    }
+
+    case nsIAccessibleEvent::EVENT_FOCUS: {
+      a11y::RootAccessible* rootAccWrap = accWrap->RootAccessible();
+      if (rootAccWrap && rootAccWrap->IsActivated()) {
+        atk_focus_tracker_notify(atkObj);
+        // Fire state change event for focus
+        atk_object_notify_state_change(atkObj, ATK_STATE_FOCUSED, true);
+        return NS_OK;
+      }
+    } break;
+
+    case nsIAccessibleEvent::EVENT_NAME_CHANGE: {
+      nsAutoString newName;
+      accessible->Name(newName);
+
+      MaybeFireNameChange(atkObj, newName);
+
+      break;
+    }
+
+    case nsIAccessibleEvent::EVENT_VALUE_CHANGE:
+    case nsIAccessibleEvent::EVENT_TEXT_VALUE_CHANGE:
+      if (accessible->HasNumericValue()) {
+        // Make sure this is a numeric value. Don't fire for string value
+        // changes (e.g. text editing) ATK values are always numeric.
+        g_object_notify((GObject*)atkObj, "accessible-value");
+      }
+      break;
+
+    case nsIAccessibleEvent::EVENT_SELECTION:
+    case nsIAccessibleEvent::EVENT_SELECTION_ADD:
+    case nsIAccessibleEvent::EVENT_SELECTION_REMOVE: {
+      // XXX: dupe events may be fired
+      AccSelChangeEvent* selChangeEvent = downcast_accEvent(aEvent);
+      g_signal_emit_by_name(
+          AccessibleWrap::GetAtkObject(selChangeEvent->Widget()),
+          "selection_changed");
+      break;
+    }
+
+    case nsIAccessibleEvent::EVENT_SELECTION_WITHIN: {
+      g_signal_emit_by_name(atkObj, "selection_changed");
+      break;
+    }
+
+    case nsIAccessibleEvent::EVENT_ALERT:
+      // A hack using state change showing events as alert events.
+      atk_object_notify_state_change(atkObj, ATK_STATE_SHOWING, true);
+      break;
+
+    case nsIAccessibleEvent::EVENT_TEXT_SELECTION_CHANGED:
+      g_signal_emit_by_name(atkObj, "text_selection_changed");
+      break;
+
+    case nsIAccessibleEvent::EVENT_TEXT_CARET_MOVED: {
+      AccCaretMoveEvent* caretMoveEvent = downcast_accEvent(aEvent);
+      NS_ASSERTION(caretMoveEvent, "Event needs event data");
+      if (!caretMoveEvent) break;
+
+      int32_t caretOffset = caretMoveEvent->GetCaretOffset();
+      g_signal_emit_by_name(atkObj, "text_caret_moved", caretOffset);
+    } break;
+
+    case nsIAccessibleEvent::EVENT_TEXT_ATTRIBUTE_CHANGED:
+      g_signal_emit_by_name(atkObj, "text-attributes-changed");
+      break;
+
+    case nsIAccessibleEvent::EVENT_TABLE_MODEL_CHANGED:
+      g_signal_emit_by_name(atkObj, "model_changed");
+      break;
+
+    case nsIAccessibleEvent::EVENT_TABLE_ROW_INSERT: {
+      AccTableChangeEvent* tableEvent = downcast_accEvent(aEvent);
+      NS_ENSURE_TRUE(tableEvent, NS_ERROR_FAILURE);
+
+      int32_t rowIndex = tableEvent->GetIndex();
+      int32_t numRows = tableEvent->GetCount();
+
+      g_signal_emit_by_name(atkObj, "row_inserted", rowIndex, numRows);
+    } break;
+
+    case nsIAccessibleEvent::EVENT_TABLE_ROW_DELETE: {
+      AccTableChangeEvent* tableEvent = downcast_accEvent(aEvent);
+      NS_ENSURE_TRUE(tableEvent, NS_ERROR_FAILURE);
+
+      int32_t rowIndex = tableEvent->GetIndex();
+      int32_t numRows = tableEvent->GetCount();
+
+      g_signal_emit_by_name(atkObj, "row_deleted", rowIndex, numRows);
+    } break;
+
+    case nsIAccessibleEvent::EVENT_TABLE_ROW_REORDER: {
+      g_signal_emit_by_name(atkObj, "row_reordered");
+      break;
+    }
+
+    case nsIAccessibleEvent::EVENT_TABLE_COLUMN_INSERT: {
+      AccTableChangeEvent* tableEvent = downcast_accEvent(aEvent);
+      NS_ENSURE_TRUE(tableEvent, NS_ERROR_FAILURE);
+
+      int32_t colIndex = tableEvent->GetIndex();
+      int32_t numCols = tableEvent->GetCount();
+      g_signal_emit_by_name(atkObj, "column_inserted", colIndex, numCols);
+    } break;
+
+    case nsIAccessibleEvent::EVENT_TABLE_COLUMN_DELETE: {
+      AccTableChangeEvent* tableEvent = downcast_accEvent(aEvent);
+      NS_ENSURE_TRUE(tableEvent, NS_ERROR_FAILURE);
+
+      int32_t colIndex = tableEvent->GetIndex();
+      int32_t numCols = tableEvent->GetCount();
+      g_signal_emit_by_name(atkObj, "column_deleted", colIndex, numCols);
+    } break;
+
+    case nsIAccessibleEvent::EVENT_TABLE_COLUMN_REORDER:
+      g_signal_emit_by_name(atkObj, "column_reordered");
+      break;
+
+    case nsIAccessibleEvent::EVENT_SECTION_CHANGED:
+      g_signal_emit_by_name(atkObj, "visible_data_changed");
+      break;
+
+    case nsIAccessibleEvent::EVENT_SHOW: {
+      AccMutationEvent* event = downcast_accEvent(aEvent);
+      LocalAccessible* parentAcc =
+          event ? event->LocalParent() : accessible->LocalParent();
+      AtkObject* parent = AccessibleWrap::GetAtkObject(parentAcc);
+      NS_ENSURE_STATE(parent);
+      auto obj = reinterpret_cast<MaiAtkObject*>(atkObj);
+      obj->FireAtkShowHideEvent(parent, true, aEvent->IsFromUserInput());
+      return NS_OK;
+    }
+
+    case nsIAccessibleEvent::EVENT_HIDE: {
+      // XXX - Handle native dialog accessibles.
+      if (!accessible->IsRoot() && accessible->HasARIARole() &&
+          accessible->ARIARole() == roles::DIALOG) {
+        guint id = g_signal_lookup("deactivate", MAI_TYPE_ATK_OBJECT);
+        g_signal_emit(atkObj, id, 0);
+      }
+
+      AccMutationEvent* event = downcast_accEvent(aEvent);
+      LocalAccessible* parentAcc =
+          event ? event->LocalParent() : accessible->LocalParent();
+      AtkObject* parent = AccessibleWrap::GetAtkObject(parentAcc);
+      NS_ENSURE_STATE(parent);
+      auto obj = reinterpret_cast<MaiAtkObject*>(atkObj);
+      obj->FireAtkShowHideEvent(parent, false, aEvent->IsFromUserInput());
+      return NS_OK;
+    }
+
+      /*
+       * Because dealing with menu is very different between nsIAccessible
+       * and ATK, and the menu activity is important, specially transfer the
+       * following two event.
+       * Need more verification by AT test.
+       */
+    case nsIAccessibleEvent::EVENT_MENU_START:
+    case nsIAccessibleEvent::EVENT_MENU_END:
+      break;
+
+    case nsIAccessibleEvent::EVENT_WINDOW_ACTIVATE: {
+      guint id = g_signal_lookup("activate", MAI_TYPE_ATK_OBJECT);
+      g_signal_emit(atkObj, id, 0);
+
+      // Always fire a current focus event after activation.
+      FocusMgr()->ForceFocusEvent();
+    } break;
+
+    case nsIAccessibleEvent::EVENT_WINDOW_DEACTIVATE: {
+      guint id = g_signal_lookup("deactivate", MAI_TYPE_ATK_OBJECT);
+      g_signal_emit(atkObj, id, 0);
+    } break;
+
+    case nsIAccessibleEvent::EVENT_WINDOW_MAXIMIZE: {
+      guint id = g_signal_lookup("maximize", MAI_TYPE_ATK_OBJECT);
+      g_signal_emit(atkObj, id, 0);
+    } break;
+
+    case nsIAccessibleEvent::EVENT_WINDOW_MINIMIZE: {
+      guint id = g_signal_lookup("minimize", MAI_TYPE_ATK_OBJECT);
+      g_signal_emit(atkObj, id, 0);
+    } break;
+
+    case nsIAccessibleEvent::EVENT_WINDOW_RESTORE: {
+      guint id = g_signal_lookup("restore", MAI_TYPE_ATK_OBJECT);
+      g_signal_emit(atkObj, id, 0);
+    } break;
+
+    case nsIAccessibleEvent::EVENT_DOCUMENT_LOAD_COMPLETE:
+      if (accessible->IsDoc()) {
+        g_signal_emit_by_name(atkObj, "load_complete");
+      }
+      // XXX - Handle native dialog accessibles.
+      if (!accessible->IsRoot() && accessible->HasARIARole() &&
+          accessible->ARIARole() == roles::DIALOG) {
+        guint id = g_signal_lookup("activate", MAI_TYPE_ATK_OBJECT);
+        g_signal_emit(atkObj, id, 0);
+      }
+      break;
+
+    case nsIAccessibleEvent::EVENT_DOCUMENT_RELOAD:
+      if (accessible->IsDoc()) {
+        g_signal_emit_by_name(atkObj, "reload");
+      }
+      break;
+
+    case nsIAccessibleEvent::EVENT_DOCUMENT_LOAD_STOPPED:
+      if (accessible->IsDoc()) {
+        g_signal_emit_by_name(atkObj, "load_stopped");
+      }
+      break;
+
+    case nsIAccessibleEvent::EVENT_MENUPOPUP_START:
+      atk_focus_tracker_notify(atkObj);  // fire extra focus event
+      atk_object_notify_state_change(atkObj, ATK_STATE_VISIBLE, true);
+      atk_object_notify_state_change(atkObj, ATK_STATE_SHOWING, true);
+      break;
+
+    case nsIAccessibleEvent::EVENT_MENUPOPUP_END:
+      atk_object_notify_state_change(atkObj, ATK_STATE_VISIBLE, false);
+      atk_object_notify_state_change(atkObj, ATK_STATE_SHOWING, false);
+      break;
+  }
+
+  return NS_OK;
+}
+
+void a11y::ProxyEvent(RemoteAccessible* aTarget, uint32_t aEventType) {
+  AtkObject* wrapper = GetWrapperFor(aTarget);
+
+  switch (aEventType) {
+    case nsIAccessibleEvent::EVENT_FOCUS:
+      atk_focus_tracker_notify(wrapper);
+      atk_object_notify_state_change(wrapper, ATK_STATE_FOCUSED, true);
+      break;
+    case nsIAccessibleEvent::EVENT_DOCUMENT_LOAD_COMPLETE:
+      if (aTarget->IsDoc()) {
+        g_signal_emit_by_name(wrapper, "load_complete");
+      }
+      break;
+    case nsIAccessibleEvent::EVENT_DOCUMENT_RELOAD:
+      if (aTarget->IsDoc()) {
+        g_signal_emit_by_name(wrapper, "reload");
+      }
+      break;
+    case nsIAccessibleEvent::EVENT_DOCUMENT_LOAD_STOPPED:
+      if (aTarget->IsDoc()) {
+        g_signal_emit_by_name(wrapper, "load_stopped");
+      }
+      break;
+    case nsIAccessibleEvent::EVENT_MENUPOPUP_START:
+      atk_focus_tracker_notify(wrapper);  // fire extra focus event
+      atk_object_notify_state_change(wrapper, ATK_STATE_VISIBLE, true);
+      atk_object_notify_state_change(wrapper, ATK_STATE_SHOWING, true);
+      break;
+    case nsIAccessibleEvent::EVENT_MENUPOPUP_END:
+      atk_object_notify_state_change(wrapper, ATK_STATE_VISIBLE, false);
+      atk_object_notify_state_change(wrapper, ATK_STATE_SHOWING, false);
+      break;
+    case nsIAccessibleEvent::EVENT_ALERT:
+      // A hack using state change showing events as alert events.
+      atk_object_notify_state_change(wrapper, ATK_STATE_SHOWING, true);
+      break;
+    case nsIAccessibleEvent::EVENT_VALUE_CHANGE:
+      g_object_notify((GObject*)wrapper, "accessible-value");
+      break;
+    case nsIAccessibleEvent::EVENT_TEXT_SELECTION_CHANGED:
+      g_signal_emit_by_name(wrapper, "text_selection_changed");
+      break;
+    case nsIAccessibleEvent::EVENT_SELECTION_WITHIN:
+      g_signal_emit_by_name(wrapper, "selection_changed");
+      break;
+    case nsIAccessibleEvent::EVENT_TEXT_ATTRIBUTE_CHANGED:
+      g_signal_emit_by_name(wrapper, "text-attributes-changed");
+      break;
+  }
+}
+
+void a11y::ProxyStateChangeEvent(RemoteAccessible* aTarget, uint64_t aState,
+                                 bool aEnabled) {
+  MaiAtkObject* atkObj = MAI_ATK_OBJECT(GetWrapperFor(aTarget));
+  atkObj->FireStateChangeEvent(aState, aEnabled);
+}
+
+void a11y::ProxyCaretMoveEvent(RemoteAccessible* aTarget, int32_t aOffset,
+                               bool aIsSelectionCollapsed,
+                               int32_t aGranularity) {
+  AtkObject* wrapper = GetWrapperFor(aTarget);
+  g_signal_emit_by_name(wrapper, "text_caret_moved", aOffset);
+}
+
+void MaiAtkObject::FireStateChangeEvent(uint64_t aState, bool aEnabled) {
+  auto state = aState;
+  int32_t stateIndex = -1;
+  while (state > 0) {
+    ++stateIndex;
+    state >>= 1;
+  }
+
+  MOZ_ASSERT(
+      stateIndex >= 0 && stateIndex < static_cast<int32_t>(gAtkStateMapLen),
+      "No ATK state for internal state was found");
+  if (stateIndex < 0 || stateIndex >= static_cast<int32_t>(gAtkStateMapLen)) {
+    return;
+  }
+
+  if (gAtkStateMap[stateIndex].atkState != kNone) {
+    MOZ_ASSERT(gAtkStateMap[stateIndex].stateMapEntryType != kNoStateChange,
+               "State changes should not fired for this state");
+
+    if (gAtkStateMap[stateIndex].stateMapEntryType == kMapOpposite) {
+      aEnabled = !aEnabled;
+    }
+
+    // Fire state change for first state if there is one to map
+    atk_object_notify_state_change(&parent, gAtkStateMap[stateIndex].atkState,
+                                   aEnabled);
+  }
+}
+
+void a11y::ProxyTextChangeEvent(RemoteAccessible* aTarget,
+                                const nsAString& aStr, int32_t aStart,
+                                uint32_t aLen, bool aIsInsert, bool aFromUser) {
+  MaiAtkObject* atkObj = MAI_ATK_OBJECT(GetWrapperFor(aTarget));
+  atkObj->FireTextChangeEvent(aStr, aStart, aLen, aIsInsert, aFromUser);
+}
+
+#define OLD_TEXT_INSERTED "text_changed::insert"
+#define OLD_TEXT_REMOVED "text_changed::delete"
+static const char* oldTextChangeStrings[2][2] = {
+    {OLD_TEXT_REMOVED NON_USER_EVENT, OLD_TEXT_INSERTED NON_USER_EVENT},
+    {OLD_TEXT_REMOVED, OLD_TEXT_INSERTED}};
+
+#define TEXT_INSERTED "text-insert"
+#define TEXT_REMOVED "text-remove"
+#define NON_USER_DETAIL "::system"
+static const char* textChangedStrings[2][2] = {
+    {TEXT_REMOVED NON_USER_DETAIL, TEXT_INSERTED NON_USER_DETAIL},
+    {TEXT_REMOVED, TEXT_INSERTED}};
+
+void MaiAtkObject::FireTextChangeEvent(const nsAString& aStr, int32_t aStart,
+                                       uint32_t aLen, bool aIsInsert,
+                                       bool aFromUser) {
+  if (gAvailableAtkSignals == eUnknown) {
+    gAvailableAtkSignals = g_signal_lookup("text-insert", G_OBJECT_TYPE(this))
+                               ? eHaveNewAtkTextSignals
+                               : eNoNewAtkSignals;
+  }
+
+  if (gAvailableAtkSignals == eNoNewAtkSignals) {
+    // XXX remove this code and the gHaveNewTextSignals check when we can
+    // stop supporting old atk since it doesn't really work anyway
+    // see bug 619002
+    const char* signal_name = oldTextChangeStrings[aFromUser][aIsInsert];
+    g_signal_emit_by_name(this, signal_name, aStart, aLen);
+  } else {
+    const char* signal_name = textChangedStrings[aFromUser][aIsInsert];
+    g_signal_emit_by_name(this, signal_name, aStart, aLen,
+                          NS_ConvertUTF16toUTF8(aStr).get());
+  }
+}
+
+void a11y::ProxyShowHideEvent(RemoteAccessible* aTarget,
+                              RemoteAccessible* aParent, bool aInsert,
+                              bool aFromUser) {
+  MaiAtkObject* obj = MAI_ATK_OBJECT(GetWrapperFor(aTarget));
+  obj->FireAtkShowHideEvent(GetWrapperFor(aParent), aInsert, aFromUser);
+}
+
+#define ADD_EVENT "children_changed::add"
+#define HIDE_EVENT "children_changed::remove"
+
+static const char* kMutationStrings[2][2] = {
+    {HIDE_EVENT NON_USER_EVENT, ADD_EVENT NON_USER_EVENT},
+    {HIDE_EVENT, ADD_EVENT},
+};
+
+void MaiAtkObject::FireAtkShowHideEvent(AtkObject* aParent, bool aIsAdded,
+                                        bool aFromUser) {
+  int32_t indexInParent = getIndexInParentCB(&this->parent);
+  const char* signal_name = kMutationStrings[aFromUser][aIsAdded];
+  g_signal_emit_by_name(aParent, signal_name, indexInParent, this, nullptr);
+}
+
+void a11y::ProxySelectionEvent(RemoteAccessible*, RemoteAccessible* aWidget,
+                               uint32_t) {
+  MaiAtkObject* obj = MAI_ATK_OBJECT(GetWrapperFor(aWidget));
+  g_signal_emit_by_name(obj, "selection_changed");
+}
+
+// static
+void AccessibleWrap::GetKeyBinding(Accessible* aAccessible,
+                                   nsAString& aResult) {
+  // Return all key bindings including access key and keyboard shortcut.
+
+  // Get access key.
+  nsAutoString keyBindingsStr;
+  KeyBinding keyBinding = aAccessible->AccessKey();
+  if (!keyBinding.IsEmpty()) {
+    keyBinding.AppendToString(keyBindingsStr, KeyBinding::eAtkFormat);
+
+    Accessible* parent = aAccessible->Parent();
+    roles::Role role = parent ? parent->Role() : roles::NOTHING;
+    if (role == roles::PARENT_MENUITEM || role == roles::MENUITEM ||
+        role == roles::RADIO_MENU_ITEM || role == roles::CHECK_MENU_ITEM) {
+      // It is submenu, expose keyboard shortcuts from menu hierarchy like
+      // "s;<Alt>f:s"
+      nsAutoString keysInHierarchyStr = keyBindingsStr;
+      do {
+        KeyBinding parentKeyBinding = parent->AccessKey();
+        if (!parentKeyBinding.IsEmpty()) {
+          nsAutoString str;
+          parentKeyBinding.ToString(str, KeyBinding::eAtkFormat);
+          str.Append(':');
+
+          keysInHierarchyStr.Insert(str, 0);
+        }
+      } while ((parent = parent->Parent()) && parent->Role() != roles::MENUBAR);
+
+      keyBindingsStr.Append(';');
+      keyBindingsStr.Append(keysInHierarchyStr);
+    }
+  } else {
+    // No access key, add ';' to point this.
+    keyBindingsStr.Append(';');
+  }
+
+  // Get keyboard shortcut.
+  keyBindingsStr.Append(';');
+  if (LocalAccessible* localAcc = aAccessible->AsLocal()) {
+    keyBinding = localAcc->KeyboardShortcut();
+    if (!keyBinding.IsEmpty()) {
+      keyBinding.AppendToString(keyBindingsStr, KeyBinding::eAtkFormat);
+    }
+  }
+  aResult = keyBindingsStr;
+}
+
+// static
+Accessible* AccessibleWrap::GetColumnHeader(TableAccessible* aAccessible,
+                                            int32_t aColIdx) {
+  if (!aAccessible) {
+    return nullptr;
+  }
+
+  Accessible* cell = aAccessible->CellAt(0, aColIdx);
+  if (!cell) {
+    return nullptr;
+  }
+
+  // If the cell at the first row is column header then assume it is column
+  // header for all rows,
+  if (cell->Role() == roles::COLUMNHEADER) {
+    return cell;
+  }
+
+  // otherwise get column header for the data cell at the first row.
+  TableCellAccessible* tableCell = cell->AsTableCell();
+  if (!tableCell) {
+    return nullptr;
+  }
+
+  AutoTArray<Accessible*, 10> headerCells;
+  tableCell->ColHeaderCells(&headerCells);
+  if (headerCells.IsEmpty()) {
+    return nullptr;
+  }
+
+  return headerCells[0];
+}
+
+// static
+Accessible* AccessibleWrap::GetRowHeader(TableAccessible* aAccessible,
+                                         int32_t aRowIdx) {
+  if (!aAccessible) {
+    return nullptr;
+  }
+
+  Accessible* cell = aAccessible->CellAt(aRowIdx, 0);
+  if (!cell) {
+    return nullptr;
+  }
+
+  // If the cell at the first column is row header then assume it is row
+  // header for all columns,
+  if (cell->Role() == roles::ROWHEADER) {
+    return cell;
+  }
+
+  // otherwise get row header for the data cell at the first column.
+  TableCellAccessible* tableCell = cell->AsTableCell();
+  if (!tableCell) {
+    return nullptr;
+  }
+
+  AutoTArray<Accessible*, 10> headerCells;
+  tableCell->RowHeaderCells(&headerCells);
+  if (headerCells.IsEmpty()) {
+    return nullptr;
+  }
+
+  return headerCells[0];
+}
diff --git a/accessible/atk/AccessibleWrap.h b/accessible/atk/AccessibleWrap.h
new file mode 100644
index 0000000000..3ef404534f
--- /dev/null
+++ b/accessible/atk/AccessibleWrap.h
@@ -0,0 +1,94 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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/. */
+
+#ifndef __NS_ACCESSIBLE_WRAP_H__
+#define __NS_ACCESSIBLE_WRAP_H__
+
+#include "nsCOMPtr.h"
+#include "LocalAccessible.h"
+
+struct _AtkObject;
+typedef struct _AtkObject AtkObject;
+
+enum AtkProperty {
+  PROP_0,  // gobject convention
+  PROP_NAME,
+  PROP_DESCRIPTION,
+  PROP_PARENT,  // ancestry has changed
+  PROP_ROLE,
+  PROP_LAYER,
+  PROP_MDI_ZORDER,
+  PROP_TABLE_CAPTION,
+  PROP_TABLE_COLUMN_DESCRIPTION,
+  PROP_TABLE_COLUMN_HEADER,
+  PROP_TABLE_ROW_DESCRIPTION,
+  PROP_TABLE_ROW_HEADER,
+  PROP_TABLE_SUMMARY,
+  PROP_LAST  // gobject convention
+};
+
+struct AtkPropertyChange {
+  int32_t type;  // property type as listed above
+  void* oldvalue;
+  void* newvalue;
+};
+
+namespace mozilla {
+namespace a11y {
+
+class MaiHyperlink;
+
+/**
+ * Atk specific functionality for an accessibility tree node that originated in
+ * mDoc's content process.
+ *
+ * AccessibleWrap, and its descendents in atk directory provide the
+ * implementation of AtkObject.
+ */
+class AccessibleWrap : public LocalAccessible {
+ public:
+  AccessibleWrap(nsIContent* aContent, DocAccessible* aDoc);
+  virtual ~AccessibleWrap();
+  void ShutdownAtkObject();
+
+  virtual void Shutdown() override;
+
+  // return the atk object for this AccessibleWrap
+  virtual void GetNativeInterface(void** aOutAccessible) override;
+  virtual nsresult HandleAccEvent(AccEvent* aEvent) override;
+
+  AtkObject* GetAtkObject(void);
+  static AtkObject* GetAtkObject(LocalAccessible* aAccessible);
+
+  bool IsValidObject();
+
+  static const char* ReturnString(nsAString& aString) {
+    static nsCString returnedString;
+    CopyUTF16toUTF8(aString, returnedString);
+    return returnedString.get();
+  }
+
+  static void GetKeyBinding(Accessible* aAccessible, nsAString& aResult);
+
+  static Accessible* GetColumnHeader(TableAccessible* aAccessible,
+                                     int32_t aColIdx);
+  static Accessible* GetRowHeader(TableAccessible* aAccessible,
+                                  int32_t aRowIdx);
+
+ protected:
+  nsresult FireAtkStateChangeEvent(AccEvent* aEvent, AtkObject* aObject);
+  nsresult FireAtkTextChangedEvent(AccEvent* aEvent, AtkObject* aObject);
+
+  AtkObject* mAtkObject;
+
+ private:
+  uint16_t CreateMaiInterfaces();
+};
+
+}  // namespace a11y
+}  // namespace mozilla
+
+#endif /* __NS_ACCESSIBLE_WRAP_H__ */
diff --git a/accessible/atk/ApplicationAccessibleWrap.cpp b/accessible/atk/ApplicationAccessibleWrap.cpp
new file mode 100644
index 0000000000..78c7f6047d
--- /dev/null
+++ b/accessible/atk/ApplicationAccessibleWrap.cpp
@@ -0,0 +1,146 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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 "ApplicationAccessibleWrap.h"
+
+#include "nsMai.h"
+#include "nsAccessibilityService.h"
+
+#include <gtk/gtk.h>
+#include "atk/atkobject.h"
+
+using namespace mozilla;
+using namespace mozilla::a11y;
+
+// ApplicationAccessibleWrap
+
+ApplicationAccessibleWrap::ApplicationAccessibleWrap()
+    : ApplicationAccessible() {}
+
+ApplicationAccessibleWrap::~ApplicationAccessibleWrap() {
+  AccessibleWrap::ShutdownAtkObject();
+}
+
+gboolean toplevel_event_watcher(GSignalInvocationHint* ihint,
+                                guint n_param_values,
+                                const GValue* param_values, gpointer data) {
+  static GQuark sQuark_gecko_acc_obj = 0;
+
+  if (!sQuark_gecko_acc_obj) {
+    sQuark_gecko_acc_obj = g_quark_from_static_string("GeckoAccObj");
+  }
+
+  if (nsAccessibilityService::IsShutdown()) return TRUE;
+
+  GObject* object =
+      reinterpret_cast<GObject*>(g_value_get_object(param_values));
+  if (!GTK_IS_WINDOW(object)) return TRUE;
+
+  AtkObject* child = gtk_widget_get_accessible(GTK_WIDGET(object));
+  AtkRole role = atk_object_get_role(child);
+
+  // GTK native dialog
+  if (!IS_MAI_OBJECT(child) &&
+      (role == ATK_ROLE_DIALOG || role == ATK_ROLE_FILE_CHOOSER ||
+       role == ATK_ROLE_COLOR_CHOOSER || role == ATK_ROLE_FONT_CHOOSER)) {
+    if (data == reinterpret_cast<gpointer>(nsIAccessibleEvent::EVENT_SHOW)) {
+      // Attach the dialog accessible to app accessible tree
+      LocalAccessible* windowAcc =
+          GetAccService()->AddNativeRootAccessible(child);
+      g_object_set_qdata(G_OBJECT(child), sQuark_gecko_acc_obj,
+                         reinterpret_cast<gpointer>(windowAcc));
+
+    } else {
+      // Deattach the dialog accessible
+      LocalAccessible* windowAcc = reinterpret_cast<LocalAccessible*>(
+          g_object_get_qdata(G_OBJECT(child), sQuark_gecko_acc_obj));
+      if (windowAcc) {
+        GetAccService()->RemoveNativeRootAccessible(windowAcc);
+        g_object_set_qdata(G_OBJECT(child), sQuark_gecko_acc_obj, nullptr);
+      }
+    }
+  }
+
+  return TRUE;
+}
+
+ENameValueFlag ApplicationAccessibleWrap::Name(nsString& aName) const {
+  // ATK doesn't provide a way to obtain an application name (for example,
+  // Firefox or Thunderbird) like IA2 does. Thus let's return an application
+  // name as accessible name that was used to get a branding name (for example,
+  // Minefield aka nightly Firefox or Daily aka nightly Thunderbird).
+  AppName(aName);
+  return eNameOK;
+}
+
+void ApplicationAccessibleWrap::GetNativeInterface(void** aOutAccessible) {
+  *aOutAccessible = nullptr;
+
+  if (!mAtkObject) {
+    mAtkObject = reinterpret_cast<AtkObject*>(
+        g_object_new(MAI_TYPE_ATK_OBJECT, nullptr));
+    if (!mAtkObject) return;
+
+    atk_object_initialize(mAtkObject, static_cast<Accessible*>(this));
+    mAtkObject->role = ATK_ROLE_INVALID;
+    mAtkObject->layer = ATK_LAYER_INVALID;
+  }
+
+  *aOutAccessible = mAtkObject;
+}
+
+struct AtkRootAccessibleAddedEvent {
+  AtkObject* app_accessible;
+  AtkObject* root_accessible;
+  uint32_t index;
+};
+
+gboolean fireRootAccessibleAddedCB(gpointer data) {
+  AtkRootAccessibleAddedEvent* eventData = (AtkRootAccessibleAddedEvent*)data;
+  g_signal_emit_by_name(eventData->app_accessible, "children_changed::add",
+                        eventData->index, eventData->root_accessible, nullptr);
+  g_object_unref(eventData->app_accessible);
+  g_object_unref(eventData->root_accessible);
+  free(data);
+
+  return FALSE;
+}
+
+bool ApplicationAccessibleWrap::InsertChildAt(uint32_t aIdx,
+                                              LocalAccessible* aChild) {
+  if (!ApplicationAccessible::InsertChildAt(aIdx, aChild)) return false;
+
+  AtkObject* atkAccessible = AccessibleWrap::GetAtkObject(aChild);
+  atk_object_set_parent(atkAccessible, mAtkObject);
+
+  uint32_t count = mChildren.Length();
+
+  // Emit children_changed::add in a timeout
+  // to make sure aRootAccWrap is fully initialized.
+  AtkRootAccessibleAddedEvent* eventData =
+      (AtkRootAccessibleAddedEvent*)malloc(sizeof(AtkRootAccessibleAddedEvent));
+  if (eventData) {
+    eventData->app_accessible = mAtkObject;
+    eventData->root_accessible = atkAccessible;
+    eventData->index = count - 1;
+    g_object_ref(mAtkObject);
+    g_object_ref(atkAccessible);
+    g_timeout_add(0, fireRootAccessibleAddedCB, eventData);
+  }
+
+  return true;
+}
+
+bool ApplicationAccessibleWrap::RemoveChild(LocalAccessible* aChild) {
+  int32_t index = aChild->IndexInParent();
+
+  AtkObject* atkAccessible = AccessibleWrap::GetAtkObject(aChild);
+  atk_object_set_parent(atkAccessible, nullptr);
+  g_signal_emit_by_name(mAtkObject, "children_changed::remove", index,
+                        atkAccessible, nullptr);
+
+  return ApplicationAccessible::RemoveChild(aChild);
+}
diff --git a/accessible/atk/ApplicationAccessibleWrap.h b/accessible/atk/ApplicationAccessibleWrap.h
new file mode 100644
index 0000000000..fe14dc045a
--- /dev/null
+++ b/accessible/atk/ApplicationAccessibleWrap.h
@@ -0,0 +1,34 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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/. */
+
+#ifndef mozilla_a11y_ApplicationAccessibleWrap_h__
+#define mozilla_a11y_ApplicationAccessibleWrap_h__
+
+#include "ApplicationAccessible.h"
+
+namespace mozilla {
+namespace a11y {
+
+class ApplicationAccessibleWrap : public ApplicationAccessible {
+ public:
+  ApplicationAccessibleWrap();
+  virtual ~ApplicationAccessibleWrap();
+
+  // LocalAccessible
+  virtual mozilla::a11y::ENameValueFlag Name(nsString& aName) const override;
+  virtual bool InsertChildAt(uint32_t aIdx, LocalAccessible* aChild) override;
+  virtual bool RemoveChild(LocalAccessible* aChild) override;
+
+  /**
+   * Return the atk object for app root accessible.
+   */
+  virtual void GetNativeInterface(void** aOutAccessible) override;
+};
+
+}  // namespace a11y
+}  // namespace mozilla
+
+#endif /* __NS_APP_ROOT_ACCESSIBLE_H__ */
diff --git a/accessible/atk/DOMtoATK.cpp b/accessible/atk/DOMtoATK.cpp
new file mode 100644
index 0000000000..2c23731bba
--- /dev/null
+++ b/accessible/atk/DOMtoATK.cpp
@@ -0,0 +1,151 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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 "DOMtoATK.h"
+#include "nsUTF8Utils.h"
+
+namespace mozilla {
+namespace a11y {
+
+namespace DOMtoATK {
+
+void AddBOMs(nsACString& aDest, const nsACString& aSource) {
+  uint32_t destlength = 0;
+
+  // First compute how much room we will need.
+  for (uint32_t srci = 0; srci < aSource.Length();) {
+    int bytes = UTF8traits::bytes(aSource[srci]);
+    if (bytes >= 4) {
+      // Non-BMP character, will add a BOM after it.
+      destlength += 3;
+    }
+    // Skip whole character encoding.
+    srci += bytes;
+    destlength += bytes;
+  }
+
+  uint32_t desti = 0;  // Index within aDest.
+
+  // Add BOMs after non-BMP characters.
+  aDest.SetLength(destlength);
+  for (uint32_t srci = 0; srci < aSource.Length();) {
+    uint32_t bytes = UTF8traits::bytes(aSource[srci]);
+
+    MOZ_ASSERT(bytes <= aSource.Length() - srci,
+               "We should have the whole sequence");
+
+    // Copy whole sequence.
+    aDest.Replace(desti, bytes, Substring(aSource, srci, bytes));
+    desti += bytes;
+    srci += bytes;
+
+    if (bytes >= 4) {
+      // More than 4 bytes in UTF-8 encoding exactly means more than 16 encoded
+      // bits.  This is thus a non-BMP character which needed a surrogate
+      // pair to get encoded in UTF-16, add a BOM after it.
+
+      // And add a BOM after it.
+      aDest.Replace(desti, 3, "\xEF\xBB\xBF");
+      desti += 3;
+    }
+  }
+  MOZ_ASSERT(desti == destlength,
+             "Incoherency between computed length"
+             "and actually translated length");
+}
+
+void ATKStringConverterHelper::AdjustOffsets(gint* aStartOffset,
+                                             gint* aEndOffset, gint count) {
+  MOZ_ASSERT(!mAdjusted,
+             "DOMtoATK::ATKStringConverterHelper::AdjustOffsets needs to be "
+             "called only once");
+
+  if (*aStartOffset > 0) {
+    (*aStartOffset)--;
+    mStartShifted = true;
+  }
+
+  if (*aEndOffset >= 0 && *aEndOffset < count) {
+    (*aEndOffset)++;
+    mEndShifted = true;
+  }
+
+#ifdef DEBUG
+  mAdjusted = true;
+#endif
+}
+
+gchar* ATKStringConverterHelper::FinishUTF16toUTF8(nsCString& aStr) {
+  int skip = 0;
+
+  if (mStartShifted) {
+    // AdjustOffsets added a leading character.
+
+    MOZ_ASSERT(aStr.Length() > 0, "There should be a leading character");
+    MOZ_ASSERT(
+        static_cast<int>(aStr.Length()) >= UTF8traits::bytes(aStr.CharAt(0)),
+        "The leading character should be complete");
+
+    // drop first character
+    skip = UTF8traits::bytes(aStr.CharAt(0));
+  }
+
+  if (mEndShifted) {
+    // AdjustOffsets added a trailing character.
+
+    MOZ_ASSERT(aStr.Length() > 0, "There should be a trailing character");
+
+    int trail = -1;
+    // Find beginning of last character.
+    for (trail = aStr.Length() - 1; trail >= 0; trail--) {
+      if (!UTF8traits::isInSeq(aStr.CharAt(trail))) {
+        break;
+      }
+    }
+    MOZ_ASSERT(trail >= 0,
+               "There should be at least a whole trailing character");
+    MOZ_ASSERT(trail + UTF8traits::bytes(aStr.CharAt(trail)) ==
+                   static_cast<int>(aStr.Length()),
+               "The trailing character should be complete");
+
+    // Drop the last character.
+    aStr.Truncate(trail);
+  }
+
+  // copy and return, libspi will free it
+  return g_strdup(aStr.get() + skip);
+}
+
+gchar* ATKStringConverterHelper::ConvertAdjusted(const nsAString& aStr) {
+  MOZ_ASSERT(mAdjusted,
+             "DOMtoATK::ATKStringConverterHelper::AdjustOffsets needs to be "
+             "called before ATKStringConverterHelper::ConvertAdjusted");
+
+  NS_ConvertUTF16toUTF8 cautoStr(aStr);
+  if (!cautoStr.get()) {
+    return nullptr;
+  }
+
+  nsAutoCString cautoStrBOMs;
+  AddBOMs(cautoStrBOMs, cautoStr);
+  return FinishUTF16toUTF8(cautoStrBOMs);
+}
+
+gchar* Convert(const nsAString& aStr) {
+  NS_ConvertUTF16toUTF8 cautoStr(aStr);
+  if (!cautoStr.get()) {
+    return nullptr;
+  }
+
+  nsAutoCString cautoStrBOMs;
+  AddBOMs(cautoStrBOMs, cautoStr);
+  return g_strdup(cautoStrBOMs.get());
+}
+
+}  // namespace DOMtoATK
+
+}  // namespace a11y
+}  // namespace mozilla
diff --git a/accessible/atk/DOMtoATK.h b/accessible/atk/DOMtoATK.h
new file mode 100644
index 0000000000..322358bc6e
--- /dev/null
+++ b/accessible/atk/DOMtoATK.h
@@ -0,0 +1,152 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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 <glib.h>
+#include <cstdint>
+#include "mozilla/a11y/HyperTextAccessibleBase.h"
+#include "nsCharTraits.h"
+#include "nsString.h"
+
+/**
+ * ATK offsets are counted in unicode codepoints, while DOM offsets are counted
+ * in UTF-16 code units.  That makes a difference for non-BMP characters,
+ * which need two UTF-16 code units to be represented (a pair of surrogates),
+ * while they are just one unicode character.
+ *
+ * To keep synchronization between ATK offsets (unicode codepoints) and DOM
+ * offsets (UTF-16 code units), after translation from UTF-16 to UTF-8 we add a
+ * BOM after each non-BMP character (which would otherwise use 2 UTF-16
+ * code units for only 1 unicode codepoint).
+ *
+ * BOMs (Byte Order Marks, U+FEFF, also known as ZERO WIDTH NO-BREAK SPACE, but
+ * that usage is deprecated) normally only appear at the beginning of unicode
+ * files, but their occurrence within text (notably after cut&paste) is not
+ * uncommon, and are thus considered as non-text.
+ *
+ * Since the selection requested through ATK may not contain both surrogates
+ * at the ends of the selection, we need to fetch one UTF-16 code point more
+ * on both side, and get rid of it before returning the string to ATK. The
+ * ATKStringConverterHelper class maintains this, NewATKString should be used
+ * to call it properly.
+ *
+ * In the end,
+ * - if the start is between the high and low surrogates, the UTF-8 result
+ * includes a BOM from it but not the character
+ * - if the end is between the high and low surrogates, the UTF-8 result
+ * includes the character but *not* the BOM
+ * - all non-BMP characters that are fully in the string are in the UTF-8 result
+ * as character followed by BOM
+ */
+namespace mozilla {
+namespace a11y {
+
+namespace DOMtoATK {
+
+/**
+ * Converts a string of accessible text into ATK gchar* string (by adding
+ * BOMs). This can be used when offsets do not need to be adjusted because
+ * ends of the string can not fall between surrogates.
+ */
+gchar* Convert(const nsAString& aStr);
+
+/**
+ * Add a BOM after each non-BMP character.
+ */
+void AddBOMs(nsACString& aDest, const nsACString& aSource);
+
+class ATKStringConverterHelper {
+ public:
+  ATKStringConverterHelper(void)
+      :
+#ifdef DEBUG
+        mAdjusted(false),
+#endif
+        mStartShifted(false),
+        mEndShifted(false) {
+  }
+
+  /**
+   * In order to properly get non-BMP values, offsets need to be changed
+   * to get one character more on each end, so that ConvertUTF16toUTF8 can
+   * convert surrogates even if the originally requested offsets fall between
+   * them.
+   */
+  void AdjustOffsets(gint* aStartOffset, gint* aEndOffset, gint count);
+
+  /**
+   * Converts a string of accessible text with adjusted offsets into ATK
+   * gchar* string (by adding BOMs).  Note, AdjustOffsets has to be called
+   * before getting the text passed to this.
+   */
+  gchar* ConvertAdjusted(const nsAString& aStr);
+
+ private:
+  /**
+   * Remove the additional characters requested by PrepareUTF16toUTF8.
+   */
+  gchar* FinishUTF16toUTF8(nsCString& aStr);
+
+#ifdef DEBUG
+  bool mAdjusted;
+#endif
+  bool mStartShifted;
+  bool mEndShifted;
+};
+
+/**
+ * Get text from aAccessible, using ATKStringConverterHelper to properly
+ * introduce appropriate BOMs.
+ */
+inline gchar* NewATKString(HyperTextAccessibleBase* aAccessible,
+                           gint aStartOffset, gint aEndOffset) {
+  gint startOffset = aStartOffset, endOffset = aEndOffset;
+  ATKStringConverterHelper converter;
+  converter.AdjustOffsets(&startOffset, &endOffset,
+                          gint(aAccessible->CharacterCount()));
+  nsAutoString str;
+  aAccessible->TextSubstring(startOffset, endOffset, str);
+
+  if (str.Length() == 0) {
+    // Bogus offsets, or empty string, either way we do not need conversion.
+    return g_strdup("");
+  }
+
+  return converter.ConvertAdjusted(str);
+}
+
+/**
+ * Get a character from aAccessible, fetching more data as appropriate to
+ * properly get non-BMP characters or a BOM as appropriate.
+ */
+inline gunichar ATKCharacter(HyperTextAccessibleBase* aAccessible,
+                             gint aOffset) {
+  // char16_t is unsigned short in Mozilla, gnuichar is guint32 in glib.
+  gunichar character = static_cast<gunichar>(aAccessible->CharAt(aOffset));
+
+  if (NS_IS_LOW_SURROGATE(character)) {
+    // Trailing surrogate, return BOM instead.
+    return 0xFEFF;
+  }
+
+  if (NS_IS_HIGH_SURROGATE(character)) {
+    // Heading surrogate, get the trailing surrogate and combine them.
+    gunichar characterLow =
+        static_cast<gunichar>(aAccessible->CharAt(aOffset + 1));
+
+    if (!NS_IS_LOW_SURROGATE(characterLow)) {
+      // It should have been a trailing surrogate... Flag the error.
+      return 0xFFFD;
+    }
+    return SURROGATE_TO_UCS4(character, characterLow);
+  }
+
+  return character;
+}
+
+}  // namespace DOMtoATK
+
+}  // namespace a11y
+}  // namespace mozilla
diff --git a/accessible/atk/DocAccessibleWrap.cpp b/accessible/atk/DocAccessibleWrap.cpp
new file mode 100644
index 0000000000..f3dfba71ac
--- /dev/null
+++ b/accessible/atk/DocAccessibleWrap.cpp
@@ -0,0 +1,36 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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 "DocAccessibleWrap.h"
+#include "mozilla/PresShell.h"
+#include "nsIWidgetListener.h"
+#include "nsTArray.h"
+#include "nsWindow.h"
+
+using namespace mozilla;
+using namespace mozilla::a11y;
+
+////////////////////////////////////////////////////////////////////////////////
+// DocAccessibleWrap
+////////////////////////////////////////////////////////////////////////////////
+
+DocAccessibleWrap::DocAccessibleWrap(dom::Document* aDocument,
+                                     PresShell* aPresShell)
+    : DocAccessible(aDocument, aPresShell) {}
+
+DocAccessibleWrap::~DocAccessibleWrap() {}
+
+bool DocAccessibleWrap::IsActivated() {
+  if (nsWindow* window = nsWindow::GetFocusedWindow()) {
+    if (nsIWidgetListener* listener = window->GetWidgetListener()) {
+      if (PresShell* presShell = listener->GetPresShell()) {
+        return presShell == PresShellPtr();
+      }
+    }
+  }
+
+  return false;
+}
diff --git a/accessible/atk/DocAccessibleWrap.h b/accessible/atk/DocAccessibleWrap.h
new file mode 100644
index 0000000000..883a4b8f0a
--- /dev/null
+++ b/accessible/atk/DocAccessibleWrap.h
@@ -0,0 +1,33 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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/. */
+
+/* For documentation of the accessibility architecture,
+ * see http://lxr.mozilla.org/seamonkey/source/accessible/accessible-docs.html
+ */
+
+#ifndef mozilla_a11y_DocAccessibleWrap_h__
+#define mozilla_a11y_DocAccessibleWrap_h__
+
+#include "DocAccessible.h"
+
+namespace mozilla {
+
+class PresShell;
+
+namespace a11y {
+
+class DocAccessibleWrap : public DocAccessible {
+ public:
+  DocAccessibleWrap(dom::Document* aDocument, PresShell* aPresShell);
+  virtual ~DocAccessibleWrap();
+
+  bool IsActivated();
+};
+
+}  // namespace a11y
+}  // namespace mozilla
+
+#endif
diff --git a/accessible/atk/HyperTextAccessibleWrap.h b/accessible/atk/HyperTextAccessibleWrap.h
new file mode 100644
index 0000000000..2c5745a2b3
--- /dev/null
+++ b/accessible/atk/HyperTextAccessibleWrap.h
@@ -0,0 +1,20 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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/. */
+
+#ifndef mozilla_a11y_HyperTextAccessibleWrap_h__
+#define mozilla_a11y_HyperTextAccessibleWrap_h__
+
+#include "HyperTextAccessible.h"
+
+namespace mozilla {
+namespace a11y {
+
+typedef class HyperTextAccessible HyperTextAccessibleWrap;
+
+}  // namespace a11y
+}  // namespace mozilla
+
+#endif
diff --git a/accessible/atk/InterfaceInitFuncs.h b/accessible/atk/InterfaceInitFuncs.h
new file mode 100644
index 0000000000..43ed8ff4ee
--- /dev/null
+++ b/accessible/atk/InterfaceInitFuncs.h
@@ -0,0 +1,43 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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/. */
+
+#ifndef ATK_INTERFACE_INIT_FUNCS_H_
+#define ATK_INTERFACE_INIT_FUNCS_H_
+
+#include <atk/atk.h>
+
+namespace mozilla {
+namespace a11y {
+
+class AccessibleWrap;
+
+}  // namespace a11y
+}  // namespace mozilla
+
+extern "C" {
+void actionInterfaceInitCB(AtkActionIface* aIface);
+void componentInterfaceInitCB(AtkComponentIface* aIface);
+void documentInterfaceInitCB(AtkDocumentIface* aIface);
+void editableTextInterfaceInitCB(AtkEditableTextIface* aIface);
+void hyperlinkImplInterfaceInitCB(AtkHyperlinkImplIface* aIface);
+void hypertextInterfaceInitCB(AtkHypertextIface* aIface);
+void imageInterfaceInitCB(AtkImageIface* aIface);
+void selectionInterfaceInitCB(AtkSelectionIface* aIface);
+void tableInterfaceInitCB(AtkTableIface* aIface);
+void tableCellInterfaceInitCB(AtkTableCellIface* aIface);
+void textInterfaceInitCB(AtkTextIface* aIface);
+void valueInterfaceInitCB(AtkValueIface* aIface);
+}
+
+/**
+ * XXX these should live in a file of utils for atk.
+ */
+AtkObject* refAccessibleAtPointHelper(AtkObject* aAtkObj, gint aX, gint aY,
+                                      AtkCoordType aCoordType);
+void getExtentsHelper(AtkObject* aAtkObj, gint* aX, gint* aY, gint* aWidth,
+                      gint* aHeight, AtkCoordType aCoordType);
+
+#endif  // ATK_INTERFACE_INIT_FUNCS_H_
diff --git a/accessible/atk/Platform.cpp b/accessible/atk/Platform.cpp
new file mode 100644
index 0000000000..e166fcfc32
--- /dev/null
+++ b/accessible/atk/Platform.cpp
@@ -0,0 +1,271 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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 "Platform.h"
+
+#include "nsIAccessibleEvent.h"
+#include "nsIGSettingsService.h"
+#include "nsMai.h"
+#include "nsServiceManagerUtils.h"
+#include "prenv.h"
+#include "prlink.h"
+
+#ifdef MOZ_ENABLE_DBUS
+#  include <dbus/dbus.h>
+#endif
+#include <gtk/gtk.h>
+
+using namespace mozilla;
+using namespace mozilla::a11y;
+
+int atkMajorVersion = 1, atkMinorVersion = 12, atkMicroVersion = 0;
+
+GType (*gAtkTableCellGetTypeFunc)();
+
+extern "C" {
+typedef GType (*AtkGetTypeType)(void);
+typedef void (*AtkBridgeAdaptorInit)(int*, char**[]);
+}
+
+static PRLibrary* sATKLib = nullptr;
+static const char sATKLibName[] = "libatk-1.0.so.0";
+static const char sATKHyperlinkImplGetTypeSymbol[] =
+    "atk_hyperlink_impl_get_type";
+
+gboolean toplevel_event_watcher(GSignalInvocationHint*, guint, const GValue*,
+                                gpointer);
+static bool sToplevel_event_hook_added = false;
+static gulong sToplevel_show_hook = 0;
+static gulong sToplevel_hide_hook = 0;
+
+GType g_atk_hyperlink_impl_type = G_TYPE_INVALID;
+
+struct AtkBridgeModule {
+  const char* libName;
+  PRLibrary* lib;
+  const char* initName;
+  AtkBridgeAdaptorInit init;
+};
+
+static AtkBridgeModule sAtkBridge = {"libatk-bridge-2.0.so.0", nullptr,
+                                     "atk_bridge_adaptor_init", nullptr};
+
+static nsresult LoadGtkModule(AtkBridgeModule& aModule) {
+  NS_ENSURE_ARG(aModule.libName);
+
+  if (!(aModule.lib = PR_LoadLibrary(aModule.libName))) {
+    return NS_ERROR_FAILURE;
+  }
+
+  // we have loaded the library, try to get the function ptrs
+  if (!(aModule.init = (AtkBridgeAdaptorInit)PR_FindFunctionSymbol(
+            aModule.lib, aModule.initName))) {
+    // fail, :(
+    PR_UnloadLibrary(aModule.lib);
+    aModule.lib = nullptr;
+    return NS_ERROR_FAILURE;
+  }
+  return NS_OK;
+}
+
+void a11y::PlatformInit() {
+  if (!ShouldA11yBeEnabled()) return;
+
+  sATKLib = PR_LoadLibrary(sATKLibName);
+  if (!sATKLib) return;
+
+  AtkGetTypeType pfn_atk_hyperlink_impl_get_type =
+      (AtkGetTypeType)PR_FindFunctionSymbol(sATKLib,
+                                            sATKHyperlinkImplGetTypeSymbol);
+  if (pfn_atk_hyperlink_impl_get_type) {
+    g_atk_hyperlink_impl_type = pfn_atk_hyperlink_impl_get_type();
+  }
+
+  gAtkTableCellGetTypeFunc =
+      (GType(*)())PR_FindFunctionSymbol(sATKLib, "atk_table_cell_get_type");
+
+  const char* (*atkGetVersion)() =
+      (const char* (*)())PR_FindFunctionSymbol(sATKLib, "atk_get_version");
+  if (atkGetVersion) {
+    const char* version = atkGetVersion();
+    if (version) {
+      char* endPtr = nullptr;
+      atkMajorVersion = strtol(version, &endPtr, 10);
+      if (atkMajorVersion != 0L) {
+        atkMinorVersion = strtol(endPtr + 1, &endPtr, 10);
+        if (atkMinorVersion != 0L) {
+          atkMicroVersion = strtol(endPtr + 1, &endPtr, 10);
+        }
+      }
+    }
+  }
+
+  // Initialize the MAI Utility class, it will overwrite gail_util.
+  g_type_class_unref(g_type_class_ref(mai_util_get_type()));
+
+  // Init atk-bridge now
+  PR_SetEnv("NO_AT_BRIDGE=0");
+  nsresult rv = LoadGtkModule(sAtkBridge);
+  if (NS_SUCCEEDED(rv)) {
+    (*sAtkBridge.init)(nullptr, nullptr);
+  }
+
+  if (!sToplevel_event_hook_added) {
+    sToplevel_event_hook_added = true;
+    sToplevel_show_hook = g_signal_add_emission_hook(
+        g_signal_lookup("show", GTK_TYPE_WINDOW), 0, toplevel_event_watcher,
+        reinterpret_cast<gpointer>(nsIAccessibleEvent::EVENT_SHOW), nullptr);
+    sToplevel_hide_hook = g_signal_add_emission_hook(
+        g_signal_lookup("hide", GTK_TYPE_WINDOW), 0, toplevel_event_watcher,
+        reinterpret_cast<gpointer>(nsIAccessibleEvent::EVENT_HIDE), nullptr);
+  }
+}
+
+void a11y::PlatformShutdown() {
+  if (sToplevel_event_hook_added) {
+    sToplevel_event_hook_added = false;
+    g_signal_remove_emission_hook(g_signal_lookup("show", GTK_TYPE_WINDOW),
+                                  sToplevel_show_hook);
+    g_signal_remove_emission_hook(g_signal_lookup("hide", GTK_TYPE_WINDOW),
+                                  sToplevel_hide_hook);
+  }
+
+  if (sAtkBridge.lib) {
+    // Do not shutdown/unload atk-bridge,
+    // an exit function registered will take care of it
+    // PR_UnloadLibrary(sAtkBridge.lib);
+    sAtkBridge.lib = nullptr;
+    sAtkBridge.init = nullptr;
+  }
+  // if (sATKLib) {
+  //     PR_UnloadLibrary(sATKLib);
+  //     sATKLib = nullptr;
+  // }
+}
+
+static const char sAccEnv[] = "GNOME_ACCESSIBILITY";
+#ifdef MOZ_ENABLE_DBUS
+static DBusPendingCall* sPendingCall = nullptr;
+#endif
+
+void a11y::PreInit() {
+#ifdef MOZ_ENABLE_DBUS
+  static bool sChecked = FALSE;
+  if (sChecked) return;
+
+  sChecked = TRUE;
+
+  // dbus is only checked if GNOME_ACCESSIBILITY is unset
+  // also make sure that a session bus address is available to prevent dbus from
+  // starting a new one.  Dbus confuses the test harness when it creates a new
+  // process (see bug 693343)
+  if (PR_GetEnv(sAccEnv) || !PR_GetEnv("DBUS_SESSION_BUS_ADDRESS")) return;
+
+  DBusConnection* bus = dbus_bus_get(DBUS_BUS_SESSION, nullptr);
+  if (!bus) return;
+
+  dbus_connection_set_exit_on_disconnect(bus, FALSE);
+
+  static const char* iface = "org.a11y.Status";
+  static const char* member = "IsEnabled";
+  DBusMessage* message;
+  message =
+      dbus_message_new_method_call("org.a11y.Bus", "/org/a11y/bus",
+                                   "org.freedesktop.DBus.Properties", "Get");
+  if (!message) goto dbus_done;
+
+  dbus_message_append_args(message, DBUS_TYPE_STRING, &iface, DBUS_TYPE_STRING,
+                           &member, DBUS_TYPE_INVALID);
+  dbus_connection_send_with_reply(bus, message, &sPendingCall, 1000);
+  dbus_message_unref(message);
+
+dbus_done:
+  dbus_connection_unref(bus);
+#endif
+}
+
+bool a11y::ShouldA11yBeEnabled() {
+  static bool sChecked = false, sShouldEnable = false;
+  if (sChecked) return sShouldEnable;
+
+  sChecked = true;
+
+  EPlatformDisabledState disabledState = PlatformDisabledState();
+  if (disabledState == ePlatformIsDisabled) {
+    return sShouldEnable = false;
+  }
+  if (disabledState == ePlatformIsForceEnabled) {
+    return sShouldEnable = true;
+  }
+
+  // check if accessibility enabled/disabled by environment variable
+  const char* envValue = PR_GetEnv(sAccEnv);
+  if (envValue) return sShouldEnable = !!atoi(envValue);
+
+#ifdef MOZ_ENABLE_DBUS
+  PreInit();
+  bool dbusSuccess = false;
+  DBusMessage* reply = nullptr;
+  if (!sPendingCall) goto dbus_done;
+
+  dbus_pending_call_block(sPendingCall);
+  reply = dbus_pending_call_steal_reply(sPendingCall);
+  dbus_pending_call_unref(sPendingCall);
+  sPendingCall = nullptr;
+  if (!reply ||
+      dbus_message_get_type(reply) != DBUS_MESSAGE_TYPE_METHOD_RETURN ||
+      strcmp(dbus_message_get_signature(reply), DBUS_TYPE_VARIANT_AS_STRING)) {
+    goto dbus_done;
+  }
+
+  DBusMessageIter iter, iter_variant, iter_struct;
+  dbus_bool_t dResult;
+  dbus_message_iter_init(reply, &iter);
+  dbus_message_iter_recurse(&iter, &iter_variant);
+  switch (dbus_message_iter_get_arg_type(&iter_variant)) {
+    case DBUS_TYPE_STRUCT:
+      // at-spi2-core 2.2.0-2.2.1 had a bug where it returned a struct
+      dbus_message_iter_recurse(&iter_variant, &iter_struct);
+      if (dbus_message_iter_get_arg_type(&iter_struct) == DBUS_TYPE_BOOLEAN) {
+        dbus_message_iter_get_basic(&iter_struct, &dResult);
+        sShouldEnable = dResult;
+        dbusSuccess = true;
+      }
+
+      break;
+    case DBUS_TYPE_BOOLEAN:
+      dbus_message_iter_get_basic(&iter_variant, &dResult);
+      sShouldEnable = dResult;
+      dbusSuccess = true;
+      break;
+    default:
+      break;
+  }
+
+dbus_done:
+  if (reply) dbus_message_unref(reply);
+
+  if (dbusSuccess) return sShouldEnable;
+#endif
+
+// check GSettings
+#define GSETINGS_A11Y_INTERFACE "org.gnome.desktop.interface"
+#define GSETINGS_A11Y_KEY "toolkit-accessibility"
+  nsCOMPtr<nsIGSettingsService> gsettings =
+      do_GetService(NS_GSETTINGSSERVICE_CONTRACTID);
+  nsCOMPtr<nsIGSettingsCollection> a11y_settings;
+
+  if (gsettings) {
+    gsettings->GetCollectionForSchema(nsLiteralCString(GSETINGS_A11Y_INTERFACE),
+                                      getter_AddRefs(a11y_settings));
+    if (a11y_settings) {
+      a11y_settings->GetBoolean(nsLiteralCString(GSETINGS_A11Y_KEY),
+                                &sShouldEnable);
+    }
+  }
+
+  return sShouldEnable;
+}
diff --git a/accessible/atk/RootAccessibleWrap.cpp b/accessible/atk/RootAccessibleWrap.cpp
new file mode 100644
index 0000000000..7d5534c564
--- /dev/null
+++ b/accessible/atk/RootAccessibleWrap.cpp
@@ -0,0 +1,25 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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 "RootAccessibleWrap.h"
+
+#include "atk/atkobject.h"
+#include "nsTArray.h"
+
+#include <glib-object.h>
+
+using namespace mozilla::a11y;
+
+GtkWindowAccessible::GtkWindowAccessible(AtkObject* aAccessible)
+    : DummyAccessible() {
+  g_object_ref(aAccessible);
+  mAtkObject = aAccessible;
+}
+
+GtkWindowAccessible::~GtkWindowAccessible() {
+  g_object_unref(mAtkObject);
+  mAtkObject = nullptr;
+}
diff --git a/accessible/atk/RootAccessibleWrap.h b/accessible/atk/RootAccessibleWrap.h
new file mode 100644
index 0000000000..75038f698d
--- /dev/null
+++ b/accessible/atk/RootAccessibleWrap.h
@@ -0,0 +1,32 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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/. */
+
+#ifndef mozilla_a11y_RootAccessibleWrap_h__
+#define mozilla_a11y_RootAccessibleWrap_h__
+
+#include "BaseAccessibles.h"
+#include "RootAccessible.h"
+
+namespace mozilla {
+namespace a11y {
+
+typedef RootAccessible RootAccessibleWrap;
+
+/* GtkWindowAccessible is the accessible class for gtk+ native window.
+ * The instance of GtkWindowAccessible is a child of MaiAppRoot instance.
+ * It is added into root when the toplevel window is created, and removed
+ * from root when the toplevel window is destroyed.
+ */
+class GtkWindowAccessible final : public DummyAccessible {
+ public:
+  explicit GtkWindowAccessible(AtkObject* aAccessible);
+  virtual ~GtkWindowAccessible();
+};
+
+}  // namespace a11y
+}  // namespace mozilla
+
+#endif /* mozilla_a11y_Root_Accessible_Wrap_h__ */
diff --git a/accessible/atk/UtilInterface.cpp b/accessible/atk/UtilInterface.cpp
new file mode 100644
index 0000000000..8389e09f80
--- /dev/null
+++ b/accessible/atk/UtilInterface.cpp
@@ -0,0 +1,347 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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 "ApplicationAccessible.h"
+#include "mozilla/Likely.h"
+#include "nsAccessibilityService.h"
+#include "nsMai.h"
+
+#include <atk/atkobject.h>
+#include <atk/atkutil.h>
+#include <gtk/gtk.h>
+#include <string.h>
+
+using namespace mozilla;
+using namespace mozilla::a11y;
+
+typedef AtkUtil MaiUtil;
+typedef AtkUtilClass MaiUtilClass;
+
+#define MAI_VERSION MOZILLA_VERSION
+#define MAI_NAME "Gecko"
+
+extern "C" {
+static guint (*gail_add_global_event_listener)(GSignalEmissionHook listener,
+                                               const gchar* event_type);
+static void (*gail_remove_global_event_listener)(guint remove_listener);
+static void (*gail_remove_key_event_listener)(guint remove_listener);
+static AtkObject* (*gail_get_root)();
+}
+
+struct MaiUtilListenerInfo {
+  gint key;
+  guint signal_id;
+  gulong hook_id;
+  // For window create/destory/minimize/maximize/restore/activate/deactivate
+  // events, we'll chain gail_util's add/remove_global_event_listener.
+  // So we store the listenerid returned by gail's add_global_event_listener
+  // in this structure to call gail's remove_global_event_listener later.
+  guint gail_listenerid;
+};
+
+static GHashTable* sListener_list = nullptr;
+static gint sListener_idx = 1;
+
+extern "C" {
+static guint add_listener(GSignalEmissionHook listener,
+                          const gchar* object_type, const gchar* signal,
+                          const gchar* hook_data, guint gail_listenerid = 0) {
+  GType type;
+  guint signal_id;
+  gint rc = 0;
+
+  type = g_type_from_name(object_type);
+  if (type) {
+    signal_id = g_signal_lookup(signal, type);
+    if (signal_id > 0) {
+      MaiUtilListenerInfo* listener_info;
+
+      rc = sListener_idx;
+
+      listener_info =
+          (MaiUtilListenerInfo*)g_malloc(sizeof(MaiUtilListenerInfo));
+      listener_info->key = sListener_idx;
+      listener_info->hook_id = g_signal_add_emission_hook(
+          signal_id, 0, listener, g_strdup(hook_data), (GDestroyNotify)g_free);
+      listener_info->signal_id = signal_id;
+      listener_info->gail_listenerid = gail_listenerid;
+
+      g_hash_table_insert(sListener_list, &(listener_info->key), listener_info);
+      sListener_idx++;
+    } else {
+      g_warning("Invalid signal type %s\n", signal);
+    }
+  } else {
+    g_warning("Invalid object type %s\n", object_type);
+  }
+  return rc;
+}
+
+static guint mai_util_add_global_event_listener(GSignalEmissionHook listener,
+                                                const gchar* event_type) {
+  guint rc = 0;
+  gchar** split_string;
+
+  split_string = g_strsplit(event_type, ":", 3);
+
+  if (split_string) {
+    if (!strcmp("window", split_string[0])) {
+      guint gail_listenerid = 0;
+      if (gail_add_global_event_listener) {
+        // call gail's function to track gtk native window events
+        gail_listenerid = gail_add_global_event_listener(listener, event_type);
+      }
+
+      rc = add_listener(listener, "MaiAtkObject", split_string[1], event_type,
+                        gail_listenerid);
+    } else {
+      rc = add_listener(listener, split_string[1], split_string[2], event_type);
+    }
+    g_strfreev(split_string);
+  }
+  return rc;
+}
+
+static void mai_util_remove_global_event_listener(guint remove_listener) {
+  if (remove_listener > 0) {
+    MaiUtilListenerInfo* listener_info;
+    gint tmp_idx = remove_listener;
+
+    listener_info =
+        (MaiUtilListenerInfo*)g_hash_table_lookup(sListener_list, &tmp_idx);
+
+    if (listener_info != nullptr) {
+      if (gail_remove_global_event_listener && listener_info->gail_listenerid) {
+        gail_remove_global_event_listener(listener_info->gail_listenerid);
+      }
+
+      /* Hook id of 0 and signal id of 0 are invalid */
+      if (listener_info->hook_id != 0 && listener_info->signal_id != 0) {
+        /* Remove the emission hook */
+        g_signal_remove_emission_hook(listener_info->signal_id,
+                                      listener_info->hook_id);
+
+        /* Remove the element from the hash */
+        g_hash_table_remove(sListener_list, &tmp_idx);
+      } else {
+        g_warning("Invalid listener hook_id %ld or signal_id %d\n",
+                  listener_info->hook_id, listener_info->signal_id);
+      }
+    } else {
+      // atk-bridge is initialized with gail (e.g. yelp)
+      // try gail_remove_global_event_listener
+      if (gail_remove_global_event_listener) {
+        return gail_remove_global_event_listener(remove_listener);
+      }
+
+      g_warning("No listener with the specified listener id %d",
+                remove_listener);
+    }
+  } else {
+    g_warning("Invalid listener_id %d", remove_listener);
+  }
+}
+
+static AtkKeyEventStruct* atk_key_event_from_gdk_event_key(GdkEventKey* key) {
+  AtkKeyEventStruct* event = g_new0(AtkKeyEventStruct, 1);
+  switch (key->type) {
+    case GDK_KEY_PRESS:
+      event->type = ATK_KEY_EVENT_PRESS;
+      break;
+    case GDK_KEY_RELEASE:
+      event->type = ATK_KEY_EVENT_RELEASE;
+      break;
+    default:
+      g_assert_not_reached();
+      return nullptr;
+  }
+  event->state = key->state;
+  event->keyval = key->keyval;
+  event->length = key->length;
+  if (key->string && key->string[0] &&
+      g_unichar_isgraph(g_utf8_get_char(key->string))) {
+    event->string = key->string;
+  } else if (key->type == GDK_KEY_PRESS || key->type == GDK_KEY_RELEASE) {
+    event->string = gdk_keyval_name(key->keyval);
+  }
+  event->keycode = key->hardware_keycode;
+  event->timestamp = key->time;
+
+  return event;
+}
+
+struct MaiKeyEventInfo {
+  AtkKeyEventStruct* key_event;
+  gpointer func_data;
+};
+
+union AtkKeySnoopFuncPointer {
+  AtkKeySnoopFunc func_ptr;
+  gpointer data;
+};
+
+static gboolean notify_hf(gpointer key, gpointer value, gpointer data) {
+  MaiKeyEventInfo* info = (MaiKeyEventInfo*)data;
+  AtkKeySnoopFuncPointer atkKeySnoop;
+  atkKeySnoop.data = value;
+  return (atkKeySnoop.func_ptr)(info->key_event, info->func_data) ? TRUE
+                                                                  : FALSE;
+}
+
+static void insert_hf(gpointer key, gpointer value, gpointer data) {
+  GHashTable* new_table = (GHashTable*)data;
+  g_hash_table_insert(new_table, key, value);
+}
+
+static GHashTable* sKey_listener_list = nullptr;
+
+static gint mai_key_snooper(GtkWidget* the_widget, GdkEventKey* event,
+                            gpointer func_data) {
+  /* notify each AtkKeySnoopFunc in turn... */
+
+  MaiKeyEventInfo* info = g_new0(MaiKeyEventInfo, 1);
+  gint consumed = 0;
+  if (sKey_listener_list) {
+    GHashTable* new_hash = g_hash_table_new(nullptr, nullptr);
+    g_hash_table_foreach(sKey_listener_list, insert_hf, new_hash);
+    info->key_event = atk_key_event_from_gdk_event_key(event);
+    info->func_data = func_data;
+    consumed = g_hash_table_foreach_steal(new_hash, notify_hf, info);
+    g_hash_table_destroy(new_hash);
+    g_free(info->key_event);
+  }
+  g_free(info);
+  return (consumed ? 1 : 0);
+}
+
+static guint sKey_snooper_id = 0;
+
+static guint mai_util_add_key_event_listener(AtkKeySnoopFunc listener,
+                                             gpointer data) {
+  if (MOZ_UNLIKELY(!listener)) {
+    return 0;
+  }
+
+  static guint key = 0;
+
+  if (!sKey_listener_list) {
+    sKey_listener_list = g_hash_table_new(nullptr, nullptr);
+  }
+
+  // If we have no registered event listeners then we need to (re)install the
+  // key event snooper.
+  if (g_hash_table_size(sKey_listener_list) == 0) {
+    sKey_snooper_id = gtk_key_snooper_install(mai_key_snooper, data);
+  }
+
+  AtkKeySnoopFuncPointer atkKeySnoop;
+  atkKeySnoop.func_ptr = listener;
+  key++;
+  g_hash_table_insert(sKey_listener_list, GUINT_TO_POINTER(key),
+                      atkKeySnoop.data);
+  return key;
+}
+
+static void mai_util_remove_key_event_listener(guint remove_listener) {
+  if (!sKey_listener_list) {
+    // atk-bridge is initialized with gail (e.g. yelp)
+    // try gail_remove_key_event_listener
+    return gail_remove_key_event_listener(remove_listener);
+  }
+
+  g_hash_table_remove(sKey_listener_list, GUINT_TO_POINTER(remove_listener));
+  if (g_hash_table_size(sKey_listener_list) == 0) {
+    gtk_key_snooper_remove(sKey_snooper_id);
+  }
+}
+
+static AtkObject* mai_util_get_root() {
+  ApplicationAccessible* app = ApplicationAcc();
+  if (app) return app->GetAtkObject();
+
+  // We've shutdown, try to use gail instead
+  // (to avoid assert in spi_atk_tidy_windows())
+  // XXX tbsaunde then why didn't we replace the gail atk_util impl?
+  if (gail_get_root) return gail_get_root();
+
+  return nullptr;
+}
+
+static const gchar* mai_util_get_toolkit_name() { return MAI_NAME; }
+
+static const gchar* mai_util_get_toolkit_version() { return MAI_VERSION; }
+
+static void _listener_info_destroy(gpointer data) { g_free(data); }
+
+static void window_added(AtkObject* atk_obj, guint index, AtkObject* child) {
+  if (!IS_MAI_OBJECT(child)) return;
+
+  static guint id = g_signal_lookup("create", MAI_TYPE_ATK_OBJECT);
+  g_signal_emit(child, id, 0);
+}
+
+static void window_removed(AtkObject* atk_obj, guint index, AtkObject* child) {
+  if (!IS_MAI_OBJECT(child)) return;
+
+  static guint id = g_signal_lookup("destroy", MAI_TYPE_ATK_OBJECT);
+  g_signal_emit(child, id, 0);
+}
+
+static void UtilInterfaceInit(MaiUtilClass* klass) {
+  AtkUtilClass* atk_class;
+  gpointer data;
+
+  data = g_type_class_peek(ATK_TYPE_UTIL);
+  atk_class = ATK_UTIL_CLASS(data);
+
+  // save gail function pointer
+  gail_add_global_event_listener = atk_class->add_global_event_listener;
+  gail_remove_global_event_listener = atk_class->remove_global_event_listener;
+  gail_remove_key_event_listener = atk_class->remove_key_event_listener;
+  gail_get_root = atk_class->get_root;
+
+  atk_class->add_global_event_listener = mai_util_add_global_event_listener;
+  atk_class->remove_global_event_listener =
+      mai_util_remove_global_event_listener;
+  atk_class->add_key_event_listener = mai_util_add_key_event_listener;
+  atk_class->remove_key_event_listener = mai_util_remove_key_event_listener;
+  atk_class->get_root = mai_util_get_root;
+  atk_class->get_toolkit_name = mai_util_get_toolkit_name;
+  atk_class->get_toolkit_version = mai_util_get_toolkit_version;
+
+  sListener_list = g_hash_table_new_full(g_int_hash, g_int_equal, nullptr,
+                                         _listener_info_destroy);
+  // Keep track of added/removed windows.
+  AtkObject* root = atk_get_root();
+  g_signal_connect(root, "children-changed::add", (GCallback)window_added,
+                   nullptr);
+  g_signal_connect(root, "children-changed::remove", (GCallback)window_removed,
+                   nullptr);
+}
+}
+
+GType mai_util_get_type() {
+  static GType type = 0;
+
+  if (!type) {
+    static const GTypeInfo tinfo = {
+        sizeof(MaiUtilClass),
+        (GBaseInitFunc) nullptr,           /* base init */
+        (GBaseFinalizeFunc) nullptr,       /* base finalize */
+        (GClassInitFunc)UtilInterfaceInit, /* class init */
+        (GClassFinalizeFunc) nullptr,      /* class finalize */
+        nullptr,                           /* class data */
+        sizeof(MaiUtil),                   /* instance size */
+        0,                                 /* nb preallocs */
+        (GInstanceInitFunc) nullptr,       /* instance init */
+        nullptr                            /* value table */
+    };
+
+    type =
+        g_type_register_static(ATK_TYPE_UTIL, "MaiUtil", &tinfo, GTypeFlags(0));
+  }
+  return type;
+}
diff --git a/accessible/atk/moz.build b/accessible/atk/moz.build
new file mode 100644
index 0000000000..57b86622b6
--- /dev/null
+++ b/accessible/atk/moz.build
@@ -0,0 +1,66 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# 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/.
+
+EXPORTS.mozilla.a11y += [
+    "AccessibleWrap.h",
+    "HyperTextAccessibleWrap.h",
+]
+
+SOURCES += [
+    "AccessibleWrap.cpp",
+    "ApplicationAccessibleWrap.cpp",
+    "DocAccessibleWrap.cpp",
+    "DOMtoATK.cpp",
+    "nsMaiHyperlink.cpp",
+    "nsMaiInterfaceAction.cpp",
+    "nsMaiInterfaceComponent.cpp",
+    "nsMaiInterfaceDocument.cpp",
+    "nsMaiInterfaceEditableText.cpp",
+    "nsMaiInterfaceHyperlinkImpl.cpp",
+    "nsMaiInterfaceHypertext.cpp",
+    "nsMaiInterfaceImage.cpp",
+    "nsMaiInterfaceSelection.cpp",
+    "nsMaiInterfaceTable.cpp",
+    "nsMaiInterfaceTableCell.cpp",
+    "nsMaiInterfaceText.cpp",
+    "nsMaiInterfaceValue.cpp",
+    "Platform.cpp",
+    "RootAccessibleWrap.cpp",
+    "UtilInterface.cpp",
+]
+
+LOCAL_INCLUDES += [
+    "/accessible/base",
+    "/accessible/generic",
+    "/accessible/html",
+    "/accessible/ipc",
+    "/accessible/ipc/other",
+    "/accessible/xpcom",
+    "/accessible/xul",
+    "/layout/generic",
+    "/other-licenses/atk-1.0",
+    "/widget",
+    "/widget/gtk",
+]
+
+FINAL_LIBRARY = "xul"
+
+if CONFIG["MOZ_WIDGET_TOOLKIT"] == "gtk":
+    CFLAGS += CONFIG["MOZ_GTK3_CFLAGS"]
+    CXXFLAGS += CONFIG["MOZ_GTK3_CFLAGS"]
+
+if CONFIG["MOZ_ENABLE_DBUS"]:
+    CXXFLAGS += CONFIG["MOZ_DBUS_CFLAGS"]
+
+include("/ipc/chromium/chromium-config.mozbuild")
+
+if CONFIG["CC_TYPE"] in ("clang", "gcc"):
+    # Used in G_DEFINE_TYPE_EXTENDED macro, probably fixed in newer glib /
+    # gobject headers. See bug 1243331 comment 3.
+    CXXFLAGS += [
+        "-Wno-error=unused-function",
+        "-Wno-unused-local-typedefs",
+    ]
diff --git a/accessible/atk/nsMai.h b/accessible/atk/nsMai.h
new file mode 100644
index 0000000000..175a3c64ff
--- /dev/null
+++ b/accessible/atk/nsMai.h
@@ -0,0 +1,112 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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/. */
+
+#ifndef __NS_MAI_H__
+#define __NS_MAI_H__
+
+#include <atk/atk.h>
+#include <glib.h>
+#include <glib-object.h>
+
+#include "AccessibleWrap.h"
+
+namespace mozilla {
+namespace a11y {
+class RemoteAccessible;
+class Accessible;
+}  // namespace a11y
+}  // namespace mozilla
+
+#define MAI_TYPE_ATK_OBJECT (mai_atk_object_get_type())
+#define MAI_ATK_OBJECT(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj), MAI_TYPE_ATK_OBJECT, MaiAtkObject))
+#define MAI_ATK_OBJECT_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass), MAI_TYPE_ATK_OBJECT, MaiAtkObjectClass))
+#define IS_MAI_OBJECT(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj), MAI_TYPE_ATK_OBJECT))
+#define IS_MAI_OBJECT_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass), MAI_TYPE_ATK_OBJECT))
+#define MAI_ATK_OBJECT_GET_CLASS(obj) \
+  (G_TYPE_INSTANCE_GET_CLASS((obj), MAI_TYPE_ATK_OBJECT, MaiAtkObjectClass))
+GType mai_atk_object_get_type(void);
+GType mai_util_get_type();
+
+// This is a pointer to the atk_table_cell_get_type function if we are using
+// a version of atk that defines that.
+extern "C" GType (*gAtkTableCellGetTypeFunc)();
+
+mozilla::a11y::AccessibleWrap* GetAccessibleWrap(AtkObject* aAtkObj);
+mozilla::a11y::RemoteAccessible* GetProxy(AtkObject* aAtkObj);
+mozilla::a11y::Accessible* GetInternalObj(AtkObject* aObj);
+AtkObject* GetWrapperFor(mozilla::a11y::Accessible* acc);
+
+extern int atkMajorVersion, atkMinorVersion, atkMicroVersion;
+
+/**
+ * Return true if the loaded version of libatk-1.0.so is at least
+ * aMajor.aMinor.aMicro.
+ */
+static inline bool IsAtkVersionAtLeast(int aMajor, int aMinor, int aMicro = 0) {
+  return aMajor < atkMajorVersion ||
+         (aMajor == atkMajorVersion &&
+          (aMinor < atkMinorVersion ||
+           (aMinor == atkMinorVersion && aMicro <= atkMicroVersion)));
+}
+
+/**
+ * This MaiAtkObject is a thin wrapper, in the MAI namespace, for AtkObject
+ */
+struct MaiAtkObject {
+  AtkObject parent;
+  /*
+   * The AccessibleWrap whose properties and features are exported
+   * via this object instance.
+   */
+  mozilla::a11y::Accessible* acc;
+
+  /*
+   * Get the AtkHyperlink for this atk object.
+   */
+  AtkHyperlink* GetAtkHyperlink();
+
+  /*
+   * Shutdown this AtkObject.
+   */
+  void Shutdown();
+
+  /*
+   * Notify atk of a state change on this AtkObject.
+   */
+  void FireStateChangeEvent(uint64_t aState, bool aEnabled);
+
+  /*
+   * Notify ATK of a text change within this ATK object.
+   */
+  void FireTextChangeEvent(const nsAString& aStr, int32_t aStart, uint32_t aLen,
+                           bool aIsInsert, bool aIsFromUser);
+
+  /**
+   * Notify ATK of a shown or hidden subtree rooted at aObject whose parent is
+   * aParent
+   */
+  void FireAtkShowHideEvent(AtkObject* aParent, bool aIsAdded, bool aFromUser);
+
+ private:
+  /*
+   * do we have text-remove and text-insert signals if not we need to use
+   * text-changed see AccessibleWrap::FireAtkTextChangedEvent() and
+   * bug 619002
+   */
+  enum EAvailableAtkSignals {
+    eUnknown,
+    eHaveNewAtkTextSignals,
+    eNoNewAtkSignals
+  };
+
+  static EAvailableAtkSignals gAvailableAtkSignals;
+};
+
+#endif /* __NS_MAI_H__ */
diff --git a/accessible/atk/nsMaiHyperlink.cpp b/accessible/atk/nsMaiHyperlink.cpp
new file mode 100644
index 0000000000..65f223e528
--- /dev/null
+++ b/accessible/atk/nsMaiHyperlink.cpp
@@ -0,0 +1,216 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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 "nsIURI.h"
+#include "nsMaiHyperlink.h"
+#include "mozilla/a11y/RemoteAccessible.h"
+
+using namespace mozilla::a11y;
+
+/* MaiAtkHyperlink */
+
+#define MAI_TYPE_ATK_HYPERLINK (mai_atk_hyperlink_get_type())
+#define MAI_ATK_HYPERLINK(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj), MAI_TYPE_ATK_HYPERLINK, MaiAtkHyperlink))
+#define MAI_ATK_HYPERLINK_CLASS(klass)                      \
+  (G_TYPE_CHECK_CLASS_CAST((klass), MAI_TYPE_ATK_HYPERLINK, \
+                           MaiAtkHyperlinkClass))
+#define MAI_IS_ATK_HYPERLINK(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj), MAI_TYPE_ATK_HYPERLINK))
+#define MAI_IS_ATK_HYPERLINK_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass), MAI_TYPE_ATK_HYPERLINK))
+#define MAI_ATK_HYPERLINK_GET_CLASS(obj)                    \
+  (G_TYPE_INSTANCE_GET_CLASS((obj), MAI_TYPE_ATK_HYPERLINK, \
+                             MaiAtkHyperlinkClass))
+
+/**
+ * This MaiAtkHyperlink is a thin wrapper, in the MAI namespace,
+ * for AtkHyperlink
+ */
+
+struct MaiAtkHyperlink {
+  AtkHyperlink parent;
+
+  /*
+   * The MaiHyperlink whose properties and features are exported via this
+   * hyperlink instance.
+   */
+  MaiHyperlink* maiHyperlink;
+};
+
+struct MaiAtkHyperlinkClass {
+  AtkHyperlinkClass parent_class;
+};
+
+GType mai_atk_hyperlink_get_type(void);
+
+G_BEGIN_DECLS
+/* callbacks for AtkHyperlink */
+static void classInitCB(AtkHyperlinkClass* aClass);
+static void finalizeCB(GObject* aObj);
+
+/* callbacks for AtkHyperlink virtual functions */
+static gchar* getUriCB(AtkHyperlink* aLink, gint aLinkIndex);
+static AtkObject* getObjectCB(AtkHyperlink* aLink, gint aLinkIndex);
+static gint getEndIndexCB(AtkHyperlink* aLink);
+static gint getStartIndexCB(AtkHyperlink* aLink);
+static gboolean isValidCB(AtkHyperlink* aLink);
+static gint getAnchorCountCB(AtkHyperlink* aLink);
+G_END_DECLS
+
+static gpointer parent_class = nullptr;
+
+static MaiHyperlink* GetMaiHyperlink(AtkHyperlink* aHyperlink) {
+  NS_ENSURE_TRUE(MAI_IS_ATK_HYPERLINK(aHyperlink), nullptr);
+  MaiHyperlink* maiHyperlink = MAI_ATK_HYPERLINK(aHyperlink)->maiHyperlink;
+  NS_ENSURE_TRUE(maiHyperlink != nullptr, nullptr);
+  NS_ENSURE_TRUE(maiHyperlink->GetAtkHyperlink() == aHyperlink, nullptr);
+  return maiHyperlink;
+}
+
+GType mai_atk_hyperlink_get_type(void) {
+  static GType type = 0;
+
+  if (!type) {
+    static const GTypeInfo tinfo = {
+        sizeof(MaiAtkHyperlinkClass),
+        (GBaseInitFunc) nullptr,
+        (GBaseFinalizeFunc) nullptr,
+        (GClassInitFunc)classInitCB,
+        (GClassFinalizeFunc) nullptr,
+        nullptr,                 /* class data */
+        sizeof(MaiAtkHyperlink), /* instance size */
+        0,                       /* nb preallocs */
+        (GInstanceInitFunc) nullptr,
+        nullptr /* value table */
+    };
+
+    type = g_type_register_static(ATK_TYPE_HYPERLINK, "MaiAtkHyperlink", &tinfo,
+                                  GTypeFlags(0));
+  }
+  return type;
+}
+
+MaiHyperlink::MaiHyperlink(Accessible* aHyperLink)
+    : mHyperlink(aHyperLink), mMaiAtkHyperlink(nullptr) {
+  mMaiAtkHyperlink = reinterpret_cast<AtkHyperlink*>(
+      g_object_new(mai_atk_hyperlink_get_type(), nullptr));
+  NS_ASSERTION(mMaiAtkHyperlink, "OUT OF MEMORY");
+  if (!mMaiAtkHyperlink) return;
+
+  MAI_ATK_HYPERLINK(mMaiAtkHyperlink)->maiHyperlink = this;
+}
+
+MaiHyperlink::~MaiHyperlink() {
+  if (mMaiAtkHyperlink) {
+    MAI_ATK_HYPERLINK(mMaiAtkHyperlink)->maiHyperlink = nullptr;
+    g_object_unref(mMaiAtkHyperlink);
+  }
+}
+
+/* static functions for ATK callbacks */
+
+void classInitCB(AtkHyperlinkClass* aClass) {
+  GObjectClass* gobject_class = G_OBJECT_CLASS(aClass);
+
+  parent_class = g_type_class_peek_parent(aClass);
+
+  aClass->get_uri = getUriCB;
+  aClass->get_object = getObjectCB;
+  aClass->get_end_index = getEndIndexCB;
+  aClass->get_start_index = getStartIndexCB;
+  aClass->is_valid = isValidCB;
+  aClass->get_n_anchors = getAnchorCountCB;
+
+  gobject_class->finalize = finalizeCB;
+}
+
+void finalizeCB(GObject* aObj) {
+  NS_ASSERTION(MAI_IS_ATK_HYPERLINK(aObj), "Invalid MaiAtkHyperlink");
+  if (!MAI_IS_ATK_HYPERLINK(aObj)) return;
+
+  MaiAtkHyperlink* maiAtkHyperlink = MAI_ATK_HYPERLINK(aObj);
+  maiAtkHyperlink->maiHyperlink = nullptr;
+
+  /* call parent finalize function */
+  if (G_OBJECT_CLASS(parent_class)->finalize) {
+    G_OBJECT_CLASS(parent_class)->finalize(aObj);
+  }
+}
+
+gchar* getUriCB(AtkHyperlink* aLink, gint aLinkIndex) {
+  MaiHyperlink* maiLink = GetMaiHyperlink(aLink);
+  if (!maiLink) {
+    return nullptr;
+  }
+
+  Accessible* acc = maiLink->Acc();
+  if (!acc) {
+    return nullptr;
+  }
+
+  nsAutoCString cautoStr;
+  nsCOMPtr<nsIURI> uri = acc->AnchorURIAt(aLinkIndex);
+  if (!uri) return nullptr;
+
+  nsresult rv = uri->GetSpec(cautoStr);
+  NS_ENSURE_SUCCESS(rv, nullptr);
+
+  return g_strdup(cautoStr.get());
+}
+
+AtkObject* getObjectCB(AtkHyperlink* aLink, gint aLinkIndex) {
+  MaiHyperlink* maiLink = GetMaiHyperlink(aLink);
+  if (!maiLink) {
+    return nullptr;
+  }
+
+  Accessible* acc = maiLink->Acc();
+  if (!acc) {
+    return nullptr;
+  }
+
+  Accessible* anchor = acc->AnchorAt(aLinkIndex);
+  return anchor ? GetWrapperFor(anchor) : nullptr;
+}
+
+gint getEndIndexCB(AtkHyperlink* aLink) {
+  MaiHyperlink* maiLink = GetMaiHyperlink(aLink);
+  if (!maiLink) return false;
+
+  return static_cast<gint>(maiLink->Acc()->EndOffset());
+}
+
+gint getStartIndexCB(AtkHyperlink* aLink) {
+  MaiHyperlink* maiLink = GetMaiHyperlink(aLink);
+  if (!maiLink) return -1;
+
+  return static_cast<gint>(maiLink->Acc()->StartOffset());
+}
+
+gboolean isValidCB(AtkHyperlink* aLink) {
+  MaiHyperlink* maiLink = GetMaiHyperlink(aLink);
+  if (!maiLink) return false;
+
+  Accessible* acc = maiLink->Acc();
+  if (!acc) {
+    return false;
+  }
+
+  return static_cast<gboolean>(acc->IsLinkValid());
+}
+
+gint getAnchorCountCB(AtkHyperlink* aLink) {
+  MaiHyperlink* maiLink = GetMaiHyperlink(aLink);
+  if (!maiLink) return -1;
+
+  Accessible* acc = maiLink->Acc();
+  if (!acc) {
+    return -1;
+  }
+
+  return static_cast<gint>(acc->AnchorCount());
+}
diff --git a/accessible/atk/nsMaiHyperlink.h b/accessible/atk/nsMaiHyperlink.h
new file mode 100644
index 0000000000..34f517cc7a
--- /dev/null
+++ b/accessible/atk/nsMaiHyperlink.h
@@ -0,0 +1,49 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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/. */
+
+#ifndef __MAI_HYPERLINK_H__
+#define __MAI_HYPERLINK_H__
+
+#include "nsMai.h"
+#include "mozilla/a11y/Accessible.h"
+#include "mozilla/a11y/LocalAccessible.h"
+#include "mozilla/a11y/RemoteAccessible.h"
+#include "nsDebug.h"
+
+struct _AtkHyperlink;
+typedef struct _AtkHyperlink AtkHyperlink;
+
+namespace mozilla {
+namespace a11y {
+
+/*
+ * MaiHyperlink is a auxiliary class for MaiInterfaceHyperText.
+ */
+
+class MaiHyperlink {
+ public:
+  explicit MaiHyperlink(Accessible* aHyperLink);
+  ~MaiHyperlink();
+
+ public:
+  AtkHyperlink* GetAtkHyperlink() const { return mMaiAtkHyperlink; }
+  Accessible* Acc() {
+    if (!mHyperlink) {
+      return nullptr;
+    }
+    NS_ASSERTION(mHyperlink->IsLink(), "Why isn't it a link!");
+    return mHyperlink;
+  }
+
+ protected:
+  Accessible* mHyperlink;
+  AtkHyperlink* mMaiAtkHyperlink;
+};
+
+}  // namespace a11y
+}  // namespace mozilla
+
+#endif /* __MAI_HYPERLINK_H__ */
diff --git a/accessible/atk/nsMaiInterfaceAction.cpp b/accessible/atk/nsMaiInterfaceAction.cpp
new file mode 100644
index 0000000000..8149e0aff5
--- /dev/null
+++ b/accessible/atk/nsMaiInterfaceAction.cpp
@@ -0,0 +1,83 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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 "InterfaceInitFuncs.h"
+
+#include "LocalAccessible-inl.h"
+#include "nsMai.h"
+#include "mozilla/Likely.h"
+#include "nsAccessibilityService.h"
+#include "RemoteAccessible.h"
+#include "nsString.h"
+
+using namespace mozilla;
+using namespace mozilla::a11y;
+
+extern "C" {
+
+static gboolean doActionCB(AtkAction* aAction, gint aActionIndex) {
+  AtkObject* atkObject = ATK_OBJECT(aAction);
+  if (Accessible* acc = GetInternalObj(atkObject)) {
+    return acc->DoAction(aActionIndex);
+  }
+
+  return false;
+}
+
+static gint getActionCountCB(AtkAction* aAction) {
+  AtkObject* atkObject = ATK_OBJECT(aAction);
+  if (Accessible* acc = GetInternalObj(atkObject)) {
+    return acc->ActionCount();
+  }
+
+  return 0;
+}
+
+static const gchar* getActionDescriptionCB(AtkAction* aAction,
+                                           gint aActionIndex) {
+  AtkObject* atkObject = ATK_OBJECT(aAction);
+  nsAutoString description;
+  if (Accessible* acc = GetInternalObj(atkObject)) {
+    acc->ActionDescriptionAt(aActionIndex, description);
+    return AccessibleWrap::ReturnString(description);
+  }
+
+  return nullptr;
+}
+
+static const gchar* getActionNameCB(AtkAction* aAction, gint aActionIndex) {
+  AtkObject* atkObject = ATK_OBJECT(aAction);
+  nsAutoString autoStr;
+  if (Accessible* acc = GetInternalObj(atkObject)) {
+    acc->ActionNameAt(aActionIndex, autoStr);
+    return AccessibleWrap::ReturnString(autoStr);
+  }
+
+  return nullptr;
+}
+
+static const gchar* getKeyBindingCB(AtkAction* aAction, gint aActionIndex) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aAction));
+  if (!acc) {
+    return nullptr;
+  }
+  nsAutoString keyBindingsStr;
+  AccessibleWrap::GetKeyBinding(acc, keyBindingsStr);
+
+  return AccessibleWrap::ReturnString(keyBindingsStr);
+}
+}
+
+void actionInterfaceInitCB(AtkActionIface* aIface) {
+  NS_ASSERTION(aIface, "Invalid aIface");
+  if (MOZ_UNLIKELY(!aIface)) return;
+
+  aIface->do_action = doActionCB;
+  aIface->get_n_actions = getActionCountCB;
+  aIface->get_description = getActionDescriptionCB;
+  aIface->get_keybinding = getKeyBindingCB;
+  aIface->get_name = getActionNameCB;
+}
diff --git a/accessible/atk/nsMaiInterfaceComponent.cpp b/accessible/atk/nsMaiInterfaceComponent.cpp
new file mode 100644
index 0000000000..c2da38fa22
--- /dev/null
+++ b/accessible/atk/nsMaiInterfaceComponent.cpp
@@ -0,0 +1,152 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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 "InterfaceInitFuncs.h"
+
+#include "LocalAccessible-inl.h"
+#include "AccessibleWrap.h"
+#include "nsAccUtils.h"
+#include "nsMai.h"
+#include "mozilla/Likely.h"
+#include "mozilla/a11y/DocAccessibleParent.h"
+#include "mozilla/a11y/RemoteAccessible.h"
+#include "mozilla/dom/BrowserParent.h"
+#include "nsAccessibilityService.h"
+
+using namespace mozilla;
+using namespace mozilla::a11y;
+
+extern "C" {
+
+static AtkObject* refAccessibleAtPointCB(AtkComponent* aComponent, gint aAccX,
+                                         gint aAccY, AtkCoordType aCoordType) {
+  return refAccessibleAtPointHelper(ATK_OBJECT(aComponent), aAccX, aAccY,
+                                    aCoordType);
+}
+
+static void getExtentsCB(AtkComponent* aComponent, gint* aX, gint* aY,
+                         gint* aWidth, gint* aHeight, AtkCoordType aCoordType) {
+  getExtentsHelper(ATK_OBJECT(aComponent), aX, aY, aWidth, aHeight, aCoordType);
+}
+
+static gboolean grabFocusCB(AtkComponent* aComponent) {
+  AtkObject* atkObject = ATK_OBJECT(aComponent);
+  Accessible* acc = GetInternalObj(atkObject);
+  if (acc) {
+    acc->TakeFocus();
+    return TRUE;
+  }
+  return FALSE;
+}
+
+// ScrollType is compatible
+MOZ_CAN_RUN_SCRIPT_BOUNDARY
+static gboolean scrollToCB(AtkComponent* aComponent, AtkScrollType type) {
+  AtkObject* atkObject = ATK_OBJECT(aComponent);
+  if (Accessible* acc = GetInternalObj(atkObject)) {
+    acc->ScrollTo(type);
+    return TRUE;
+  }
+
+  return FALSE;
+}
+
+// CoordType is compatible
+static gboolean scrollToPointCB(AtkComponent* aComponent, AtkCoordType coords,
+                                gint x, gint y) {
+  AtkObject* atkObject = ATK_OBJECT(aComponent);
+  AccessibleWrap* accWrap = GetAccessibleWrap(atkObject);
+  if (accWrap) {
+    accWrap->ScrollToPoint(coords, x, y);
+    return TRUE;
+  }
+
+  RemoteAccessible* proxy = GetProxy(atkObject);
+  if (proxy) {
+    proxy->ScrollToPoint(coords, x, y);
+    return TRUE;
+  }
+
+  return FALSE;
+}
+}
+
+AtkObject* refAccessibleAtPointHelper(AtkObject* aAtkObj, gint aX, gint aY,
+                                      AtkCoordType aCoordType) {
+  Accessible* acc = GetInternalObj(aAtkObj);
+  if (!acc) {
+    return nullptr;
+  }
+
+  // Accessible::ChildAtPoint(x,y) is in screen pixels.
+  if (aCoordType == ATK_XY_WINDOW) {
+    mozilla::LayoutDeviceIntPoint winCoords =
+        nsAccUtils::GetScreenCoordsForWindow(acc);
+    aX += winCoords.x;
+    aY += winCoords.y;
+  }
+
+  Accessible* accAtPoint =
+      acc->ChildAtPoint(aX, aY, Accessible::EWhichChildAtPoint::DeepestChild);
+  if (!accAtPoint) {
+    return nullptr;
+  }
+  roles::Role role = accAtPoint->Role();
+  if (role == roles::TEXT_LEAF || role == roles::STATICTEXT) {
+    // We don't include text leaf nodes in the ATK tree, so return the parent.
+    accAtPoint = accAtPoint->Parent();
+    MOZ_ASSERT(accAtPoint, "Text leaf should always have a parent");
+  }
+  AtkObject* atkObj = GetWrapperFor(accAtPoint);
+  if (atkObj) {
+    g_object_ref(atkObj);
+  }
+  return atkObj;
+}
+
+void getExtentsHelper(AtkObject* aAtkObj, gint* aX, gint* aY, gint* aWidth,
+                      gint* aHeight, AtkCoordType aCoordType) {
+  *aX = *aY = *aWidth = *aHeight = -1;
+
+  Accessible* acc = GetInternalObj(aAtkObj);
+  if (!acc) {
+    return;
+  }
+
+  mozilla::LayoutDeviceIntRect screenRect = acc->Bounds();
+  if (screenRect.IsEmpty()) {
+    return;
+  }
+
+  if (aCoordType == ATK_XY_WINDOW) {
+    mozilla::LayoutDeviceIntPoint winCoords =
+        nsAccUtils::GetScreenCoordsForWindow(acc);
+    screenRect.x -= winCoords.x;
+    screenRect.y -= winCoords.y;
+  }
+
+  *aX = screenRect.x;
+  *aY = screenRect.y;
+  *aWidth = screenRect.width;
+  *aHeight = screenRect.height;
+}
+
+void componentInterfaceInitCB(AtkComponentIface* aIface) {
+  NS_ASSERTION(aIface, "Invalid Interface");
+  if (MOZ_UNLIKELY(!aIface)) return;
+
+  /*
+   * Use default implementation in atk for contains, get_position,
+   * and get_size
+   */
+  aIface->ref_accessible_at_point = refAccessibleAtPointCB;
+  aIface->get_extents = getExtentsCB;
+  aIface->grab_focus = grabFocusCB;
+  if (IsAtkVersionAtLeast(2, 30)) {
+    aIface->scroll_to = scrollToCB;
+    aIface->scroll_to_point = scrollToPointCB;
+  }
+}
diff --git a/accessible/atk/nsMaiInterfaceDocument.cpp b/accessible/atk/nsMaiInterfaceDocument.cpp
new file mode 100644
index 0000000000..da1bffce37
--- /dev/null
+++ b/accessible/atk/nsMaiInterfaceDocument.cpp
@@ -0,0 +1,106 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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 "InterfaceInitFuncs.h"
+
+#include "LocalAccessible-inl.h"
+#include "AccessibleWrap.h"
+#include "DocAccessible.h"
+#include "nsAccUtils.h"
+#include "nsMai.h"
+#include "RemoteAccessible.h"
+#include "mozilla/a11y/DocAccessibleParent.h"
+#include "mozilla/Likely.h"
+
+using namespace mozilla::a11y;
+
+static const char* const kDocUrlName = "DocURL";
+static const char* const kMimeTypeName = "MimeType";
+
+// below functions are vfuncs on an ATK  interface so they need to be C call
+extern "C" {
+
+static const gchar* getDocumentLocaleCB(AtkDocument* aDocument);
+static AtkAttributeSet* getDocumentAttributesCB(AtkDocument* aDocument);
+static const gchar* getDocumentAttributeValueCB(AtkDocument* aDocument,
+                                                const gchar* aAttrName);
+
+void documentInterfaceInitCB(AtkDocumentIface* aIface) {
+  NS_ASSERTION(aIface, "Invalid Interface");
+  if (MOZ_UNLIKELY(!aIface)) return;
+
+  /*
+   * We don't support get_document or set_attribute right now.
+   */
+  aIface->get_document_attributes = getDocumentAttributesCB;
+  aIface->get_document_attribute_value = getDocumentAttributeValueCB;
+  aIface->get_document_locale = getDocumentLocaleCB;
+}
+
+const gchar* getDocumentLocaleCB(AtkDocument* aDocument) {
+  nsAutoString locale;
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aDocument));
+  if (acc) {
+    acc->Language(locale);
+  }
+
+  return locale.IsEmpty() ? nullptr : AccessibleWrap::ReturnString(locale);
+}
+
+static inline GSList* prependToList(GSList* aList, const char* const aName,
+                                    const nsAutoString& aValue) {
+  if (aValue.IsEmpty()) {
+    return aList;
+  }
+
+  // libspi will free these
+  AtkAttribute* atkAttr = (AtkAttribute*)g_malloc(sizeof(AtkAttribute));
+  atkAttr->name = g_strdup(aName);
+  atkAttr->value = g_strdup(NS_ConvertUTF16toUTF8(aValue).get());
+  return g_slist_prepend(aList, atkAttr);
+}
+
+AtkAttributeSet* getDocumentAttributesCB(AtkDocument* aDocument) {
+  nsAutoString url;
+  nsAutoString mimeType;
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aDocument));
+
+  if (!acc || !acc->IsDoc()) {
+    return nullptr;
+  }
+
+  nsAccUtils::DocumentURL(acc, url);
+  nsAccUtils::DocumentMimeType(acc, mimeType);
+
+  // according to atkobject.h, AtkAttributeSet is a GSList
+  GSList* attributes = nullptr;
+  attributes = prependToList(attributes, kDocUrlName, url);
+  attributes = prependToList(attributes, kMimeTypeName, mimeType);
+
+  return attributes;
+}
+
+const gchar* getDocumentAttributeValueCB(AtkDocument* aDocument,
+                                         const gchar* aAttrName) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aDocument));
+
+  if (!acc || !acc->IsDoc()) {
+    return nullptr;
+  }
+
+  nsAutoString attrValue;
+  if (!strcasecmp(aAttrName, kDocUrlName)) {
+    nsAccUtils::DocumentURL(acc, attrValue);
+  } else if (!strcasecmp(aAttrName, kMimeTypeName)) {
+    nsAccUtils::DocumentMimeType(acc, attrValue);
+  } else {
+    return nullptr;
+  }
+
+  return attrValue.IsEmpty() ? nullptr
+                             : AccessibleWrap::ReturnString(attrValue);
+}
+}
diff --git a/accessible/atk/nsMaiInterfaceEditableText.cpp b/accessible/atk/nsMaiInterfaceEditableText.cpp
new file mode 100644
index 0000000000..2dc692362e
--- /dev/null
+++ b/accessible/atk/nsMaiInterfaceEditableText.cpp
@@ -0,0 +1,100 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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 "InterfaceInitFuncs.h"
+
+#include "LocalAccessible-inl.h"
+#include "HyperTextAccessible-inl.h"
+#include "nsMai.h"
+#include "RemoteAccessible.h"
+#include "nsString.h"
+#include "mozilla/Likely.h"
+
+using namespace mozilla::a11y;
+
+extern "C" {
+static void setTextContentsCB(AtkEditableText* aText, const gchar* aString) {
+  if (Accessible* acc = GetInternalObj(ATK_OBJECT(aText))) {
+    if (acc->IsTextRole()) {
+      return;
+    }
+    if (HyperTextAccessibleBase* text = acc->AsHyperTextBase()) {
+      NS_ConvertUTF8toUTF16 strContent(aString);
+      text->ReplaceText(strContent);
+    }
+  }
+}
+
+static void insertTextCB(AtkEditableText* aText, const gchar* aString,
+                         gint aLength, gint* aPosition) {
+  if (Accessible* acc = GetInternalObj(ATK_OBJECT(aText))) {
+    if (acc->IsTextRole()) {
+      return;
+    }
+    if (HyperTextAccessibleBase* text = acc->AsHyperTextBase()) {
+      NS_ConvertUTF8toUTF16 strContent(aString);
+      text->InsertText(strContent, *aPosition);
+    }
+  }
+}
+
+static void copyTextCB(AtkEditableText* aText, gint aStartPos, gint aEndPos) {
+  if (Accessible* acc = GetInternalObj(ATK_OBJECT(aText))) {
+    if (acc->IsTextRole()) {
+      return;
+    }
+    if (HyperTextAccessibleBase* text = acc->AsHyperTextBase()) {
+      text->CopyText(aStartPos, aEndPos);
+    }
+  }
+}
+
+static void cutTextCB(AtkEditableText* aText, gint aStartPos, gint aEndPos) {
+  if (Accessible* acc = GetInternalObj(ATK_OBJECT(aText))) {
+    if (acc->IsTextRole()) {
+      return;
+    }
+    if (HyperTextAccessibleBase* text = acc->AsHyperTextBase()) {
+      text->CutText(aStartPos, aEndPos);
+    }
+  }
+}
+
+static void deleteTextCB(AtkEditableText* aText, gint aStartPos, gint aEndPos) {
+  if (Accessible* acc = GetInternalObj(ATK_OBJECT(aText))) {
+    if (acc->IsTextRole()) {
+      return;
+    }
+    if (HyperTextAccessibleBase* text = acc->AsHyperTextBase()) {
+      text->DeleteText(aStartPos, aEndPos);
+    }
+  }
+}
+
+MOZ_CAN_RUN_SCRIPT_BOUNDARY
+static void pasteTextCB(AtkEditableText* aText, gint aPosition) {
+  if (Accessible* acc = GetInternalObj(ATK_OBJECT(aText))) {
+    if (acc->IsTextRole()) {
+      return;
+    }
+    if (HyperTextAccessibleBase* text = acc->AsHyperTextBase()) {
+      text->PasteText(aPosition);
+    }
+  }
+}
+}
+
+void editableTextInterfaceInitCB(AtkEditableTextIface* aIface) {
+  NS_ASSERTION(aIface, "Invalid aIface");
+  if (MOZ_UNLIKELY(!aIface)) return;
+
+  aIface->set_text_contents = setTextContentsCB;
+  aIface->insert_text = insertTextCB;
+  aIface->copy_text = copyTextCB;
+  aIface->cut_text = cutTextCB;
+  aIface->delete_text = deleteTextCB;
+  aIface->paste_text = pasteTextCB;
+}
diff --git a/accessible/atk/nsMaiInterfaceHyperlinkImpl.cpp b/accessible/atk/nsMaiInterfaceHyperlinkImpl.cpp
new file mode 100644
index 0000000000..ed8c4f4fce
--- /dev/null
+++ b/accessible/atk/nsMaiInterfaceHyperlinkImpl.cpp
@@ -0,0 +1,32 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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 "InterfaceInitFuncs.h"
+
+#include "nsMaiHyperlink.h"
+#include "mozilla/Likely.h"
+
+using namespace mozilla::a11y;
+
+extern "C" {
+static AtkHyperlink* getHyperlinkCB(AtkHyperlinkImpl* aImpl) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aImpl));
+  if (!acc) {
+    return nullptr;
+  }
+
+  NS_ASSERTION(acc->IsLink(), "why isn't it a link!");
+
+  return MAI_ATK_OBJECT(aImpl)->GetAtkHyperlink();
+}
+}
+
+void hyperlinkImplInterfaceInitCB(AtkHyperlinkImplIface* aIface) {
+  NS_ASSERTION(aIface, "no interface!");
+  if (MOZ_UNLIKELY(!aIface)) return;
+
+  aIface->get_hyperlink = getHyperlinkCB;
+}
diff --git a/accessible/atk/nsMaiInterfaceHypertext.cpp b/accessible/atk/nsMaiInterfaceHypertext.cpp
new file mode 100644
index 0000000000..1e073c87d2
--- /dev/null
+++ b/accessible/atk/nsMaiInterfaceHypertext.cpp
@@ -0,0 +1,63 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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 "InterfaceInitFuncs.h"
+
+#include "LocalAccessible-inl.h"
+#include "HyperTextAccessible.h"
+#include "nsMai.h"
+#include "nsMaiHyperlink.h"
+#include "RemoteAccessible.h"
+#include "mozilla/Likely.h"
+
+using namespace mozilla::a11y;
+
+extern "C" {
+
+static AtkHyperlink* getLinkCB(AtkHypertext* aText, gint aLinkIndex) {
+  if (Accessible* acc = GetInternalObj(ATK_OBJECT(aText))) {
+    if (HyperTextAccessibleBase* hyperText = acc->AsHyperTextBase()) {
+      Accessible* linkAcc = hyperText->LinkAt(aLinkIndex);
+      AtkObject* atkHyperLink = GetWrapperFor(linkAcc);
+      NS_ENSURE_TRUE(IS_MAI_OBJECT(atkHyperLink), nullptr);
+      return MAI_ATK_OBJECT(atkHyperLink)->GetAtkHyperlink();
+    }
+  }
+
+  return nullptr;
+}
+
+static gint getLinkCountCB(AtkHypertext* aText) {
+  if (Accessible* acc = GetInternalObj(ATK_OBJECT(aText))) {
+    if (HyperTextAccessibleBase* hyperText = acc->AsHyperTextBase()) {
+      return static_cast<gint>(hyperText->LinkCount());
+    }
+  }
+  return -1;
+}
+
+static gint getLinkIndexCB(AtkHypertext* aText, gint aCharIndex) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aText));
+  if (!acc) {
+    return -1;
+  }
+  HyperTextAccessibleBase* hyperText = acc->AsHyperTextBase();
+  if (!hyperText) {
+    return -1;
+  }
+  return hyperText->LinkIndexAtOffset(aCharIndex);
+}
+
+}  // extern "C"
+
+void hypertextInterfaceInitCB(AtkHypertextIface* aIface) {
+  NS_ASSERTION(aIface, "no interface!");
+  if (MOZ_UNLIKELY(!aIface)) return;
+
+  aIface->get_link = getLinkCB;
+  aIface->get_n_links = getLinkCountCB;
+  aIface->get_link_index = getLinkIndexCB;
+}
diff --git a/accessible/atk/nsMaiInterfaceImage.cpp b/accessible/atk/nsMaiInterfaceImage.cpp
new file mode 100644
index 0000000000..dee28f109f
--- /dev/null
+++ b/accessible/atk/nsMaiInterfaceImage.cpp
@@ -0,0 +1,61 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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 "InterfaceInitFuncs.h"
+
+#include "AccessibleWrap.h"
+#include "mozilla/a11y/Accessible.h"
+#include "mozilla/Likely.h"
+#include "nsMai.h"
+#include "nsIAccessibleTypes.h"
+
+using namespace mozilla;
+using namespace mozilla::a11y;
+
+extern "C" {
+const gchar* getDescriptionCB(AtkObject* aAtkObj);
+
+static void getImagePositionCB(AtkImage* aImage, gint* aAccX, gint* aAccY,
+                               AtkCoordType aCoordType) {
+  LayoutDeviceIntPoint pos(-1, -1);
+  uint32_t geckoCoordType =
+      (aCoordType == ATK_XY_WINDOW)
+          ? nsIAccessibleCoordinateType::COORDTYPE_WINDOW_RELATIVE
+          : nsIAccessibleCoordinateType::COORDTYPE_SCREEN_RELATIVE;
+
+  if (Accessible* acc = GetInternalObj(ATK_OBJECT(aImage))) {
+    pos = acc->Position(geckoCoordType);
+  }
+
+  *aAccX = pos.x;
+  *aAccY = pos.y;
+}
+
+static const gchar* getImageDescriptionCB(AtkImage* aImage) {
+  return getDescriptionCB(ATK_OBJECT(aImage));
+}
+
+static void getImageSizeCB(AtkImage* aImage, gint* aAccWidth,
+                           gint* aAccHeight) {
+  LayoutDeviceIntSize size(-1, -1);
+  if (Accessible* acc = GetInternalObj(ATK_OBJECT(aImage))) {
+    size = acc->Size();
+  }
+
+  *aAccWidth = size.width;
+  *aAccHeight = size.height;
+}
+
+}  // extern "C"
+
+void imageInterfaceInitCB(AtkImageIface* aIface) {
+  NS_ASSERTION(aIface, "no interface!");
+  if (MOZ_UNLIKELY(!aIface)) return;
+
+  aIface->get_image_position = getImagePositionCB;
+  aIface->get_image_description = getImageDescriptionCB;
+  aIface->get_image_size = getImageSizeCB;
+}
diff --git a/accessible/atk/nsMaiInterfaceSelection.cpp b/accessible/atk/nsMaiInterfaceSelection.cpp
new file mode 100644
index 0000000000..80b4d260f1
--- /dev/null
+++ b/accessible/atk/nsMaiInterfaceSelection.cpp
@@ -0,0 +1,102 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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 "InterfaceInitFuncs.h"
+
+#include "LocalAccessible-inl.h"
+#include "AccessibleWrap.h"
+#include "nsMai.h"
+#include "mozilla/Likely.h"
+
+#include <atk/atkobject.h>
+#include <atk/atkselection.h>
+
+using namespace mozilla::a11y;
+
+extern "C" {
+
+static gboolean addSelectionCB(AtkSelection* aSelection, gint i) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aSelection));
+  if (acc && acc->IsSelect()) {
+    return acc->AddItemToSelection(i);
+  }
+
+  return FALSE;
+}
+
+static gboolean clearSelectionCB(AtkSelection* aSelection) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aSelection));
+  if (acc && acc->IsSelect()) {
+    return acc->UnselectAll();
+  }
+
+  return FALSE;
+}
+
+static AtkObject* refSelectionCB(AtkSelection* aSelection, gint i) {
+  AtkObject* atkObj = nullptr;
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aSelection));
+  Accessible* selectedItem = acc->GetSelectedItem(i);
+  if (selectedItem) {
+    atkObj = GetWrapperFor(selectedItem);
+  }
+
+  if (atkObj) {
+    g_object_ref(atkObj);
+  }
+
+  return atkObj;
+}
+
+static gint getSelectionCountCB(AtkSelection* aSelection) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aSelection));
+  if (acc && acc->IsSelect()) {
+    return acc->SelectedItemCount();
+  }
+
+  return -1;
+}
+
+static gboolean isChildSelectedCB(AtkSelection* aSelection, gint i) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aSelection));
+  if (acc && acc->IsSelect()) {
+    return acc->IsItemSelected(i);
+  }
+
+  return FALSE;
+}
+
+static gboolean removeSelectionCB(AtkSelection* aSelection, gint i) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aSelection));
+  if (acc && acc->IsSelect()) {
+    return acc->RemoveItemFromSelection(i);
+  }
+
+  return FALSE;
+}
+
+static gboolean selectAllSelectionCB(AtkSelection* aSelection) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aSelection));
+  if (acc && acc->IsSelect()) {
+    return acc->SelectAll();
+  }
+
+  return FALSE;
+}
+}
+
+void selectionInterfaceInitCB(AtkSelectionIface* aIface) {
+  NS_ASSERTION(aIface, "Invalid aIface");
+  if (MOZ_UNLIKELY(!aIface)) return;
+
+  aIface->add_selection = addSelectionCB;
+  aIface->clear_selection = clearSelectionCB;
+  aIface->ref_selection = refSelectionCB;
+  aIface->get_selection_count = getSelectionCountCB;
+  aIface->is_child_selected = isChildSelectedCB;
+  aIface->remove_selection = removeSelectionCB;
+  aIface->select_all_selection = selectAllSelectionCB;
+}
diff --git a/accessible/atk/nsMaiInterfaceTable.cpp b/accessible/atk/nsMaiInterfaceTable.cpp
new file mode 100644
index 0000000000..cfba9e78d1
--- /dev/null
+++ b/accessible/atk/nsMaiInterfaceTable.cpp
@@ -0,0 +1,264 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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 "InterfaceInitFuncs.h"
+
+#include "AccessibleWrap.h"
+#include "mozilla/a11y/TableAccessible.h"
+#include "nsAccessibilityService.h"
+#include "nsMai.h"
+#include "RemoteAccessible.h"
+#include "nsTArray.h"
+
+#include "mozilla/Likely.h"
+
+using namespace mozilla;
+using namespace mozilla::a11y;
+
+extern "C" {
+static AtkObject* refAtCB(AtkTable* aTable, gint aRowIdx, gint aColIdx) {
+  if (aRowIdx < 0 || aColIdx < 0) {
+    return nullptr;
+  }
+
+  AtkObject* cellAtkObj = nullptr;
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aTable));
+  if (!acc) {
+    return nullptr;
+  }
+  Accessible* cell = acc->AsTable()->CellAt(aRowIdx, aColIdx);
+  if (!cell) {
+    return nullptr;
+  }
+
+  cellAtkObj = GetWrapperFor(cell);
+
+  if (cellAtkObj) {
+    g_object_ref(cellAtkObj);
+  }
+
+  return cellAtkObj;
+}
+
+static gint getIndexAtCB(AtkTable* aTable, gint aRowIdx, gint aColIdx) {
+  if (aRowIdx < 0 || aColIdx < 0) {
+    return -1;
+  }
+
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aTable));
+  if (!acc) {
+    return -1;
+  }
+  return static_cast<gint>(acc->AsTable()->CellIndexAt(aRowIdx, aColIdx));
+}
+
+static gint getColumnAtIndexCB(AtkTable* aTable, gint aIdx) {
+  if (aIdx < 0) {
+    return -1;
+  }
+
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aTable));
+  if (!acc) {
+    return -1;
+  }
+  return static_cast<gint>(acc->AsTable()->ColIndexAt(aIdx));
+}
+
+static gint getRowAtIndexCB(AtkTable* aTable, gint aIdx) {
+  if (aIdx < 0) {
+    return -1;
+  }
+
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aTable));
+  if (!acc) {
+    return -1;
+  }
+  return static_cast<gint>(acc->AsTable()->RowIndexAt(aIdx));
+}
+
+static gint getColumnCountCB(AtkTable* aTable) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aTable));
+  if (!acc) {
+    return -1;
+  }
+  return static_cast<gint>(acc->AsTable()->ColCount());
+}
+
+static gint getRowCountCB(AtkTable* aTable) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aTable));
+  if (!acc) {
+    return -1;
+  }
+  return static_cast<gint>(acc->AsTable()->RowCount());
+}
+
+static gint getColumnExtentAtCB(AtkTable* aTable, gint aRowIdx, gint aColIdx) {
+  if (aRowIdx < 0 || aColIdx < 0) {
+    return -1;
+  }
+
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aTable));
+  if (!acc) {
+    return -1;
+  }
+  return static_cast<gint>(acc->AsTable()->ColExtentAt(aRowIdx, aColIdx));
+}
+
+static gint getRowExtentAtCB(AtkTable* aTable, gint aRowIdx, gint aColIdx) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aTable));
+  if (!acc) {
+    return -1;
+  }
+  return static_cast<gint>(acc->AsTable()->RowExtentAt(aRowIdx, aColIdx));
+}
+
+static AtkObject* getCaptionCB(AtkTable* aTable) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aTable));
+  if (!acc) {
+    return nullptr;
+  }
+  Accessible* caption = acc->AsTable()->Caption();
+  return caption ? GetWrapperFor(caption) : nullptr;
+}
+
+static const gchar* getColumnDescriptionCB(AtkTable* aTable, gint aColumn) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aTable));
+  if (!acc) {
+    return nullptr;
+  }
+  nsAutoString autoStr;
+  acc->AsTable()->ColDescription(aColumn, autoStr);
+  return AccessibleWrap::ReturnString(autoStr);
+}
+
+static AtkObject* getColumnHeaderCB(AtkTable* aTable, gint aColIdx) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aTable));
+  if (!acc) {
+    return nullptr;
+  }
+  Accessible* header = AccessibleWrap::GetColumnHeader(acc->AsTable(), aColIdx);
+  return header ? GetWrapperFor(header) : nullptr;
+}
+
+static const gchar* getRowDescriptionCB(AtkTable* aTable, gint aRow) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aTable));
+  if (!acc) {
+    return nullptr;
+  }
+  nsAutoString autoStr;
+  acc->AsTable()->RowDescription(aRow, autoStr);
+  return AccessibleWrap::ReturnString(autoStr);
+}
+
+static AtkObject* getRowHeaderCB(AtkTable* aTable, gint aRowIdx) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aTable));
+  if (!acc) {
+    return nullptr;
+  }
+  Accessible* header = AccessibleWrap::GetRowHeader(acc->AsTable(), aRowIdx);
+  return header ? GetWrapperFor(header) : nullptr;
+}
+
+static AtkObject* getSummaryCB(AtkTable* aTable) {
+  // Neither html:table nor xul:tree nor ARIA grid/tree have an ability to
+  // link an accessible object to specify a summary. There is closes method
+  // in TableAccessible::summary to get a summary as a string which is not
+  // mapped directly to ATK.
+  return nullptr;
+}
+
+static gint getSelectedColumnsCB(AtkTable* aTable, gint** aSelected) {
+  *aSelected = nullptr;
+
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aTable));
+  if (!acc) {
+    return 0;
+  }
+  AutoTArray<uint32_t, 10> cols;
+  acc->AsTable()->SelectedColIndices(&cols);
+
+  if (cols.IsEmpty()) return 0;
+
+  gint* atkColumns = g_new(gint, cols.Length());
+  if (!atkColumns) {
+    NS_WARNING("OUT OF MEMORY");
+    return 0;
+  }
+
+  memcpy(atkColumns, cols.Elements(), cols.Length() * sizeof(uint32_t));
+  *aSelected = atkColumns;
+  return cols.Length();
+}
+
+static gint getSelectedRowsCB(AtkTable* aTable, gint** aSelected) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aTable));
+  if (!acc) {
+    return 0;
+  }
+  AutoTArray<uint32_t, 10> rows;
+  acc->AsTable()->SelectedRowIndices(&rows);
+
+  gint* atkRows = g_new(gint, rows.Length());
+  if (!atkRows) {
+    NS_WARNING("OUT OF MEMORY");
+    return 0;
+  }
+
+  memcpy(atkRows, rows.Elements(), rows.Length() * sizeof(uint32_t));
+  *aSelected = atkRows;
+  return rows.Length();
+}
+
+static gboolean isColumnSelectedCB(AtkTable* aTable, gint aColIdx) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aTable));
+  if (!acc) {
+    return FALSE;
+  }
+  return static_cast<gboolean>(acc->AsTable()->IsColSelected(aColIdx));
+}
+
+static gboolean isRowSelectedCB(AtkTable* aTable, gint aRowIdx) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aTable));
+  if (!acc) {
+    return FALSE;
+  }
+  return static_cast<gboolean>(acc->AsTable()->IsRowSelected(aRowIdx));
+}
+
+static gboolean isCellSelectedCB(AtkTable* aTable, gint aRowIdx, gint aColIdx) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aTable));
+  if (!acc) {
+    return FALSE;
+  }
+  return static_cast<gboolean>(
+      acc->AsTable()->IsCellSelected(aRowIdx, aColIdx));
+}
+}
+
+void tableInterfaceInitCB(AtkTableIface* aIface) {
+  NS_ASSERTION(aIface, "no interface!");
+  if (MOZ_UNLIKELY(!aIface)) return;
+
+  aIface->ref_at = refAtCB;
+  aIface->get_index_at = getIndexAtCB;
+  aIface->get_column_at_index = getColumnAtIndexCB;
+  aIface->get_row_at_index = getRowAtIndexCB;
+  aIface->get_n_columns = getColumnCountCB;
+  aIface->get_n_rows = getRowCountCB;
+  aIface->get_column_extent_at = getColumnExtentAtCB;
+  aIface->get_row_extent_at = getRowExtentAtCB;
+  aIface->get_caption = getCaptionCB;
+  aIface->get_column_description = getColumnDescriptionCB;
+  aIface->get_column_header = getColumnHeaderCB;
+  aIface->get_row_description = getRowDescriptionCB;
+  aIface->get_row_header = getRowHeaderCB;
+  aIface->get_summary = getSummaryCB;
+  aIface->get_selected_columns = getSelectedColumnsCB;
+  aIface->get_selected_rows = getSelectedRowsCB;
+  aIface->is_column_selected = isColumnSelectedCB;
+  aIface->is_row_selected = isRowSelectedCB;
+  aIface->is_selected = isCellSelectedCB;
+}
diff --git a/accessible/atk/nsMaiInterfaceTableCell.cpp b/accessible/atk/nsMaiInterfaceTableCell.cpp
new file mode 100644
index 0000000000..06a684a87d
--- /dev/null
+++ b/accessible/atk/nsMaiInterfaceTableCell.cpp
@@ -0,0 +1,148 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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 "InterfaceInitFuncs.h"
+
+#include "mozilla/a11y/TableAccessible.h"
+#include "mozilla/a11y/TableCellAccessible.h"
+#include "nsAccessibilityService.h"
+#include "nsMai.h"
+#include "RemoteAccessible.h"
+#include "nsTArray.h"
+
+#include "mozilla/Likely.h"
+
+using namespace mozilla;
+using namespace mozilla::a11y;
+
+extern "C" {
+static gint GetColumnSpanCB(AtkTableCell* aCell) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aCell));
+  if (!acc) {
+    return 0;
+  }
+  return static_cast<gint>(acc->AsTableCell()->ColExtent());
+}
+
+static gint GetRowSpanCB(AtkTableCell* aCell) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aCell));
+  if (!acc) {
+    return 0;
+  }
+  return static_cast<gint>(acc->AsTableCell()->RowExtent());
+}
+
+static gboolean GetPositionCB(AtkTableCell* aCell, gint* aRow, gint* aCol) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aCell));
+  if (!acc) {
+    return false;
+  }
+  TableCellAccessible* cell = acc->AsTableCell();
+  if (!cell) {
+    return false;
+  }
+  *aRow = static_cast<gint>(cell->RowIdx());
+  *aCol = static_cast<gint>(cell->ColIdx());
+  return true;
+}
+
+static gboolean GetColumnRowSpanCB(AtkTableCell* aCell, gint* aCol, gint* aRow,
+                                   gint* aColExtent, gint* aRowExtent) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aCell));
+  if (!acc) {
+    return false;
+  }
+  TableCellAccessible* cellAcc = acc->AsTableCell();
+  if (!cellAcc) {
+    return false;
+  }
+  *aCol = static_cast<gint>(cellAcc->ColIdx());
+  *aRow = static_cast<gint>(cellAcc->RowIdx());
+  *aColExtent = static_cast<gint>(cellAcc->ColExtent());
+  *aRowExtent = static_cast<gint>(cellAcc->ColExtent());
+  return true;
+}
+
+static AtkObject* GetTableCB(AtkTableCell* aTableCell) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aTableCell));
+  if (!acc) {
+    return nullptr;
+  }
+  TableCellAccessible* cell = acc->AsTableCell();
+  if (!cell) {
+    return nullptr;
+  }
+  TableAccessible* table = cell->Table();
+  if (!table) {
+    return nullptr;
+  }
+  Accessible* tableAcc = table->AsAccessible();
+  return tableAcc ? GetWrapperFor(tableAcc) : nullptr;
+}
+
+static GPtrArray* GetColumnHeaderCellsCB(AtkTableCell* aCell) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aCell));
+  if (!acc) {
+    return nullptr;
+  }
+  TableCellAccessible* cell = acc->AsTableCell();
+  if (!cell) {
+    return nullptr;
+  }
+  AutoTArray<Accessible*, 10> headers;
+  cell->ColHeaderCells(&headers);
+  if (headers.IsEmpty()) {
+    return nullptr;
+  }
+
+  GPtrArray* atkHeaders = g_ptr_array_sized_new(headers.Length());
+  for (Accessible* header : headers) {
+    AtkObject* atkHeader = GetWrapperFor(header);
+    g_object_ref(atkHeader);
+    g_ptr_array_add(atkHeaders, atkHeader);
+  }
+
+  return atkHeaders;
+}
+
+static GPtrArray* GetRowHeaderCellsCB(AtkTableCell* aCell) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aCell));
+  if (!acc) {
+    return nullptr;
+  }
+  TableCellAccessible* cell = acc->AsTableCell();
+  if (!cell) {
+    return nullptr;
+  }
+  AutoTArray<Accessible*, 10> headers;
+  cell->RowHeaderCells(&headers);
+  if (headers.IsEmpty()) {
+    return nullptr;
+  }
+
+  GPtrArray* atkHeaders = g_ptr_array_sized_new(headers.Length());
+  for (Accessible* header : headers) {
+    AtkObject* atkHeader = GetWrapperFor(header);
+    g_object_ref(atkHeader);
+    g_ptr_array_add(atkHeaders, atkHeader);
+  }
+
+  return atkHeaders;
+}
+}
+
+void tableCellInterfaceInitCB(AtkTableCellIface* aIface) {
+  NS_ASSERTION(aIface, "no interface!");
+  if (MOZ_UNLIKELY(!aIface)) return;
+
+  aIface->get_column_span = GetColumnSpanCB;
+  aIface->get_column_header_cells = GetColumnHeaderCellsCB;
+  aIface->get_position = GetPositionCB;
+  aIface->get_row_span = GetRowSpanCB;
+  aIface->get_row_header_cells = GetRowHeaderCellsCB;
+  aIface->get_row_column_span = GetColumnRowSpanCB;
+  aIface->get_table = GetTableCB;
+}
diff --git a/accessible/atk/nsMaiInterfaceText.cpp b/accessible/atk/nsMaiInterfaceText.cpp
new file mode 100644
index 0000000000..6a5d431bc8
--- /dev/null
+++ b/accessible/atk/nsMaiInterfaceText.cpp
@@ -0,0 +1,564 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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 "InterfaceInitFuncs.h"
+#include "mozilla/a11y/PDocAccessible.h"
+#include "nsAccessibilityService.h"
+#include "LocalAccessible-inl.h"
+#include "HyperTextAccessible-inl.h"
+#include "nsMai.h"
+#include "RemoteAccessible.h"
+#include "AccAttributes.h"
+
+#include "nsIAccessibleTypes.h"
+#include "nsISimpleEnumerator.h"
+#include "nsUTF8Utils.h"
+
+#include "mozilla/Likely.h"
+
+#include "DOMtoATK.h"
+
+using namespace mozilla;
+using namespace mozilla::a11y;
+
+static const char* sAtkTextAttrNames[ATK_TEXT_ATTR_LAST_DEFINED];
+
+static AtkAttributeSet* ConvertToAtkTextAttributeSet(
+    AccAttributes* aAttributes) {
+  if (!aAttributes) {
+    // This can happen if an Accessible dies in the content process, but the
+    // parent hasn't been udpated yet.
+    return nullptr;
+  }
+
+  AtkAttributeSet* atkAttributeSet = nullptr;
+
+  for (auto iter : *aAttributes) {
+    AtkAttribute* atkAttr = (AtkAttribute*)g_malloc(sizeof(AtkAttribute));
+    nsAutoString value;
+    // We set atkAttr->name directly for each case. For the value, we set the
+    // value string for each case. atkAttr->value is set at the end based on the
+    // value string.
+
+    // Set atkAttr->name to a specific ATK attribute name.
+    auto atkName = [&atkAttr](AtkTextAttribute aAttrNum) {
+      atkAttr->name = g_strdup(sAtkTextAttrNames[aAttrNum]);
+    };
+    // Set value to a formatted ATK color value.
+    auto colorValue = [&iter, &value] {
+      // The format of the atk attribute is r,g,b and the gecko one is
+      // rgb(r, g, b).
+      auto color = iter.Value<Color>();
+      MOZ_ASSERT(color);
+      value.AppendInt(NS_GET_R(color->mValue));
+      value.Append(',');
+      value.AppendInt(NS_GET_G(color->mValue));
+      value.Append(',');
+      value.AppendInt(NS_GET_B(color->mValue));
+    };
+
+    nsAtom* name = iter.Name();
+    if (name == nsGkAtoms::color) {
+      atkName(ATK_TEXT_ATTR_FG_COLOR);
+      colorValue();
+    } else if (name == nsGkAtoms::backgroundColor) {
+      atkName(ATK_TEXT_ATTR_BG_COLOR);
+      colorValue();
+    } else if (name == nsGkAtoms::font_family) {
+      atkName(ATK_TEXT_ATTR_FAMILY_NAME);
+      iter.ValueAsString(value);
+    } else if (name == nsGkAtoms::font_size) {
+      atkName(ATK_TEXT_ATTR_SIZE);
+      // ATK wants the number of points without pt at the end.
+      auto fontSize = iter.Value<FontSize>();
+      MOZ_ASSERT(fontSize);
+      value.AppendInt(fontSize->mValue);
+    } else if (name == nsGkAtoms::fontWeight) {
+      atkName(ATK_TEXT_ATTR_WEIGHT);
+      iter.ValueAsString(value);
+    } else if (name == nsGkAtoms::invalid) {
+      atkName(ATK_TEXT_ATTR_INVALID);
+      iter.ValueAsString(value);
+    } else {
+      nsAutoString nameStr;
+      iter.NameAsString(nameStr);
+      atkAttr->name = g_strdup(NS_ConvertUTF16toUTF8(nameStr).get());
+      iter.ValueAsString(value);
+    }
+
+    atkAttr->value = g_strdup(NS_ConvertUTF16toUTF8(value).get());
+    atkAttributeSet = g_slist_prepend(atkAttributeSet, atkAttr);
+  }
+
+  // libatk-adaptor will free it
+  return atkAttributeSet;
+}
+
+extern "C" {
+
+static gchar* getTextCB(AtkText* aText, gint aStartOffset, gint aEndOffset) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aText));
+  if (!acc || !acc->IsTextRole()) {
+    return nullptr;
+  }
+  HyperTextAccessibleBase* text = acc->AsHyperTextBase();
+  if (!text) {
+    return nullptr;
+  }
+  return DOMtoATK::NewATKString(text, aStartOffset, aEndOffset);
+}
+
+static gint getCharacterCountCB(AtkText* aText);
+
+// Note: this does not support magic offsets, which is fine for its callers
+// which do not implement any.
+static gchar* getCharTextAtOffset(AtkText* aText, gint aOffset,
+                                  gint* aStartOffset, gint* aEndOffset) {
+  gint end = aOffset + 1;
+  gint count = getCharacterCountCB(aText);
+
+  if (aOffset > count) {
+    aOffset = count;
+  }
+  if (end > count) {
+    end = count;
+  }
+  if (aOffset < 0) {
+    aOffset = 0;
+  }
+  if (end < 0) {
+    end = 0;
+  }
+  *aStartOffset = aOffset;
+  *aEndOffset = end;
+
+  return getTextCB(aText, aOffset, end);
+}
+
+static gchar* getTextAfterOffsetCB(AtkText* aText, gint aOffset,
+                                   AtkTextBoundary aBoundaryType,
+                                   gint* aStartOffset, gint* aEndOffset) {
+  if (aBoundaryType == ATK_TEXT_BOUNDARY_CHAR) {
+    return getCharTextAtOffset(aText, aOffset + 1, aStartOffset, aEndOffset);
+  }
+
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aText));
+  if (!acc) {
+    return nullptr;
+  }
+
+  HyperTextAccessibleBase* text = acc->AsHyperTextBase();
+  if (!text || !acc->IsTextRole()) {
+    return nullptr;
+  }
+
+  nsAutoString autoStr;
+  int32_t startOffset = 0, endOffset = 0;
+  text->TextAfterOffset(aOffset, aBoundaryType, &startOffset, &endOffset,
+                        autoStr);
+
+  *aStartOffset = startOffset;
+  *aEndOffset = endOffset;
+
+  // libspi will free it.
+  return DOMtoATK::Convert(autoStr);
+}
+
+static gchar* getTextAtOffsetCB(AtkText* aText, gint aOffset,
+                                AtkTextBoundary aBoundaryType,
+                                gint* aStartOffset, gint* aEndOffset) {
+  if (aBoundaryType == ATK_TEXT_BOUNDARY_CHAR) {
+    return getCharTextAtOffset(aText, aOffset, aStartOffset, aEndOffset);
+  }
+
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aText));
+  if (!acc) {
+    return nullptr;
+  }
+
+  HyperTextAccessibleBase* text = acc->AsHyperTextBase();
+  if (!text || !acc->IsTextRole()) {
+    return nullptr;
+  }
+
+  nsAutoString autoStr;
+  int32_t startOffset = 0, endOffset = 0;
+  text->TextAtOffset(aOffset, aBoundaryType, &startOffset, &endOffset, autoStr);
+
+  *aStartOffset = startOffset;
+  *aEndOffset = endOffset;
+
+  // libspi will free it.
+  return DOMtoATK::Convert(autoStr);
+}
+
+static gunichar getCharacterAtOffsetCB(AtkText* aText, gint aOffset) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aText));
+  if (!acc) {
+    return 0;
+  }
+
+  HyperTextAccessibleBase* text = acc->AsHyperTextBase();
+  if (text) {
+    return DOMtoATK::ATKCharacter(text, aOffset);
+  }
+
+  return 0;
+}
+
+static gchar* getTextBeforeOffsetCB(AtkText* aText, gint aOffset,
+                                    AtkTextBoundary aBoundaryType,
+                                    gint* aStartOffset, gint* aEndOffset) {
+  if (aBoundaryType == ATK_TEXT_BOUNDARY_CHAR) {
+    return getCharTextAtOffset(aText, aOffset - 1, aStartOffset, aEndOffset);
+  }
+
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aText));
+  if (!acc) {
+    return nullptr;
+  }
+
+  HyperTextAccessibleBase* text = acc->AsHyperTextBase();
+  if (!text || !acc->IsTextRole()) {
+    return nullptr;
+  }
+
+  nsAutoString autoStr;
+  int32_t startOffset = 0, endOffset = 0;
+  text->TextBeforeOffset(aOffset, aBoundaryType, &startOffset, &endOffset,
+                         autoStr);
+
+  *aStartOffset = startOffset;
+  *aEndOffset = endOffset;
+
+  // libspi will free it.
+  return DOMtoATK::Convert(autoStr);
+}
+
+static gint getCaretOffsetCB(AtkText* aText) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aText));
+  if (!acc) {
+    return -1;
+  }
+
+  HyperTextAccessibleBase* text = acc->AsHyperTextBase();
+  if (!text || !acc->IsTextRole()) {
+    return -1;
+  }
+
+  return static_cast<gint>(text->CaretOffset());
+}
+
+static AtkAttributeSet* getRunAttributesCB(AtkText* aText, gint aOffset,
+                                           gint* aStartOffset,
+                                           gint* aEndOffset) {
+  *aStartOffset = -1;
+  *aEndOffset = -1;
+  int32_t startOffset = 0, endOffset = 0;
+
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aText));
+  if (!acc) {
+    return nullptr;
+  }
+
+  HyperTextAccessibleBase* text = acc->AsHyperTextBase();
+  if (!text || !acc->IsTextRole()) {
+    return nullptr;
+  }
+
+  RefPtr<AccAttributes> attributes =
+      text->TextAttributes(false, aOffset, &startOffset, &endOffset);
+
+  *aStartOffset = startOffset;
+  *aEndOffset = endOffset;
+
+  return ConvertToAtkTextAttributeSet(attributes);
+}
+
+static AtkAttributeSet* getDefaultAttributesCB(AtkText* aText) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aText));
+  if (!acc) {
+    return nullptr;
+  }
+
+  HyperTextAccessibleBase* text = acc->AsHyperTextBase();
+  if (!text || !acc->IsTextRole()) {
+    return nullptr;
+  }
+
+  RefPtr<AccAttributes> attributes = text->DefaultTextAttributes();
+  return ConvertToAtkTextAttributeSet(attributes);
+}
+
+static void getCharacterExtentsCB(AtkText* aText, gint aOffset, gint* aX,
+                                  gint* aY, gint* aWidth, gint* aHeight,
+                                  AtkCoordType aCoords) {
+  if (!aX || !aY || !aWidth || !aHeight) {
+    return;
+  }
+  *aX = *aY = *aWidth = *aHeight = -1;
+
+  uint32_t geckoCoordType;
+  if (aCoords == ATK_XY_SCREEN) {
+    geckoCoordType = nsIAccessibleCoordinateType::COORDTYPE_SCREEN_RELATIVE;
+  } else {
+    geckoCoordType = nsIAccessibleCoordinateType::COORDTYPE_WINDOW_RELATIVE;
+  }
+
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aText));
+  if (!acc) {
+    return;
+  }
+
+  HyperTextAccessibleBase* text = acc->AsHyperTextBase();
+  if (!text || !acc->IsTextRole()) {
+    return;
+  }
+
+  LayoutDeviceIntRect rect = text->CharBounds(aOffset, geckoCoordType);
+
+  *aX = rect.x;
+  *aY = rect.y;
+  *aWidth = rect.width;
+  *aHeight = rect.height;
+}
+
+static void getRangeExtentsCB(AtkText* aText, gint aStartOffset,
+                              gint aEndOffset, AtkCoordType aCoords,
+                              AtkTextRectangle* aRect) {
+  if (!aRect) {
+    return;
+  }
+  aRect->x = aRect->y = aRect->width = aRect->height = -1;
+
+  uint32_t geckoCoordType;
+  if (aCoords == ATK_XY_SCREEN) {
+    geckoCoordType = nsIAccessibleCoordinateType::COORDTYPE_SCREEN_RELATIVE;
+  } else {
+    geckoCoordType = nsIAccessibleCoordinateType::COORDTYPE_WINDOW_RELATIVE;
+  }
+
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aText));
+  if (!acc) {
+    return;
+  }
+
+  HyperTextAccessibleBase* text = acc->AsHyperTextBase();
+  if (!text || !acc->IsTextRole()) {
+    return;
+  }
+
+  LayoutDeviceIntRect rect =
+      text->TextBounds(aStartOffset, aEndOffset, geckoCoordType);
+
+  aRect->x = rect.x;
+  aRect->y = rect.y;
+  aRect->width = rect.width;
+  aRect->height = rect.height;
+}
+
+static gint getCharacterCountCB(AtkText* aText) {
+  if (Accessible* acc = GetInternalObj(ATK_OBJECT(aText))) {
+    if (HyperTextAccessibleBase* text = acc->AsHyperTextBase()) {
+      return static_cast<gint>(text->CharacterCount());
+    }
+  }
+  return 0;
+}
+
+static gint getOffsetAtPointCB(AtkText* aText, gint aX, gint aY,
+                               AtkCoordType aCoords) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aText));
+  if (!acc) {
+    return -1;
+  }
+  HyperTextAccessibleBase* text = acc->AsHyperTextBase();
+  if (!text || !acc->IsTextRole()) {
+    return -1;
+  }
+  return static_cast<gint>(text->OffsetAtPoint(
+      aX, aY,
+      (aCoords == ATK_XY_SCREEN
+           ? nsIAccessibleCoordinateType::COORDTYPE_SCREEN_RELATIVE
+           : nsIAccessibleCoordinateType::COORDTYPE_WINDOW_RELATIVE)));
+}
+
+static gint getTextSelectionCountCB(AtkText* aText) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aText));
+  if (!acc) {
+    return 0;
+  }
+
+  HyperTextAccessibleBase* text = acc->AsHyperTextBase();
+  if (!text || !acc->IsTextRole()) {
+    return 0;
+  }
+
+  return text->SelectionCount();
+}
+
+static gchar* getTextSelectionCB(AtkText* aText, gint aSelectionNum,
+                                 gint* aStartOffset, gint* aEndOffset) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aText));
+  if (!acc) {
+    return nullptr;
+  }
+
+  int32_t startOffset = 0, endOffset = 0;
+  HyperTextAccessibleBase* text = acc->AsHyperTextBase();
+  if (!text || !acc->IsTextRole()) {
+    return nullptr;
+  }
+
+  text->SelectionBoundsAt(aSelectionNum, &startOffset, &endOffset);
+  *aStartOffset = startOffset;
+  *aEndOffset = endOffset;
+
+  return getTextCB(aText, *aStartOffset, *aEndOffset);
+}
+
+// set methods
+static gboolean addTextSelectionCB(AtkText* aText, gint aStartOffset,
+                                   gint aEndOffset) {
+  AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
+  if (accWrap) {
+    HyperTextAccessible* text = accWrap->AsHyperText();
+    if (!text || !text->IsTextRole()) {
+      return FALSE;
+    }
+
+    return text->AddToSelection(aStartOffset, aEndOffset);
+  }
+  if (RemoteAccessible* proxy = GetProxy(ATK_OBJECT(aText))) {
+    return proxy->AddToSelection(aStartOffset, aEndOffset);
+  }
+
+  return FALSE;
+}
+
+static gboolean removeTextSelectionCB(AtkText* aText, gint aSelectionNum) {
+  AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
+  if (accWrap) {
+    HyperTextAccessible* text = accWrap->AsHyperText();
+    if (!text || !text->IsTextRole()) {
+      return FALSE;
+    }
+
+    return text->RemoveFromSelection(aSelectionNum);
+  }
+  if (RemoteAccessible* proxy = GetProxy(ATK_OBJECT(aText))) {
+    return proxy->RemoveFromSelection(aSelectionNum);
+  }
+
+  return FALSE;
+}
+
+static gboolean setTextSelectionCB(AtkText* aText, gint aSelectionNum,
+                                   gint aStartOffset, gint aEndOffset) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aText));
+  if (!acc || !acc->IsTextRole()) {
+    return FALSE;
+  }
+  HyperTextAccessibleBase* text = acc->AsHyperTextBase();
+  if (!text) {
+    return FALSE;
+  }
+  return text->SetSelectionBoundsAt(aSelectionNum, aStartOffset, aEndOffset);
+}
+
+static gboolean setCaretOffsetCB(AtkText* aText, gint aOffset) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aText));
+  if (!acc) {
+    return FALSE;
+  }
+
+  HyperTextAccessibleBase* text = acc->AsHyperTextBase();
+  if (!text || !acc->IsTextRole()) {
+    return FALSE;
+  }
+
+  text->SetCaretOffset(aOffset);
+  return TRUE;
+}
+
+static gboolean scrollSubstringToCB(AtkText* aText, gint aStartOffset,
+                                    gint aEndOffset, AtkScrollType aType) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(aText));
+  if (!acc) {
+    return FALSE;
+  }
+
+  HyperTextAccessibleBase* text = acc->AsHyperTextBase();
+  if (!text) {
+    return FALSE;
+  }
+
+  text->ScrollSubstringTo(aStartOffset, aEndOffset, aType);
+
+  return TRUE;
+}
+
+static gboolean scrollSubstringToPointCB(AtkText* aText, gint aStartOffset,
+                                         gint aEndOffset, AtkCoordType aCoords,
+                                         gint aX, gint aY) {
+  AtkObject* atkObject = ATK_OBJECT(aText);
+  AccessibleWrap* accWrap = GetAccessibleWrap(atkObject);
+  if (accWrap) {
+    HyperTextAccessible* text = accWrap->AsHyperText();
+    if (!text || !text->IsTextRole() ||
+        !text->IsValidRange(aStartOffset, aEndOffset)) {
+      return FALSE;
+    }
+    text->ScrollSubstringToPoint(aStartOffset, aEndOffset, aCoords, aX, aY);
+    return TRUE;
+  }
+
+  RemoteAccessible* proxy = GetProxy(atkObject);
+  if (proxy) {
+    proxy->ScrollSubstringToPoint(aStartOffset, aEndOffset, aCoords, aX, aY);
+    return TRUE;
+  }
+
+  return FALSE;
+}
+}
+
+void textInterfaceInitCB(AtkTextIface* aIface) {
+  NS_ASSERTION(aIface, "Invalid aIface");
+  if (MOZ_UNLIKELY(!aIface)) return;
+
+  aIface->get_text = getTextCB;
+  aIface->get_text_after_offset = getTextAfterOffsetCB;
+  aIface->get_text_at_offset = getTextAtOffsetCB;
+  aIface->get_character_at_offset = getCharacterAtOffsetCB;
+  aIface->get_text_before_offset = getTextBeforeOffsetCB;
+  aIface->get_caret_offset = getCaretOffsetCB;
+  aIface->get_run_attributes = getRunAttributesCB;
+  aIface->get_default_attributes = getDefaultAttributesCB;
+  aIface->get_character_extents = getCharacterExtentsCB;
+  aIface->get_range_extents = getRangeExtentsCB;
+  aIface->get_character_count = getCharacterCountCB;
+  aIface->get_offset_at_point = getOffsetAtPointCB;
+  aIface->get_n_selections = getTextSelectionCountCB;
+  aIface->get_selection = getTextSelectionCB;
+
+  // set methods
+  aIface->add_selection = addTextSelectionCB;
+  aIface->remove_selection = removeTextSelectionCB;
+  aIface->set_selection = setTextSelectionCB;
+  aIface->set_caret_offset = setCaretOffsetCB;
+
+  if (IsAtkVersionAtLeast(2, 32)) {
+    aIface->scroll_substring_to = scrollSubstringToCB;
+    aIface->scroll_substring_to_point = scrollSubstringToPointCB;
+  }
+
+  // Cache the string values of the atk text attribute names.
+  for (uint32_t i = 0; i < ArrayLength(sAtkTextAttrNames); i++) {
+    sAtkTextAttrNames[i] =
+        atk_text_attribute_get_name(static_cast<AtkTextAttribute>(i));
+  }
+}
diff --git a/accessible/atk/nsMaiInterfaceValue.cpp b/accessible/atk/nsMaiInterfaceValue.cpp
new file mode 100644
index 0000000000..05a7da171e
--- /dev/null
+++ b/accessible/atk/nsMaiInterfaceValue.cpp
@@ -0,0 +1,98 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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 "InterfaceInitFuncs.h"
+
+#include "AccessibleWrap.h"
+#include "nsMai.h"
+#include "RemoteAccessible.h"
+#include "mozilla/FloatingPoint.h"
+#include "mozilla/Likely.h"
+
+using namespace mozilla;
+using namespace mozilla::a11y;
+
+extern "C" {
+
+static void getCurrentValueCB(AtkValue* obj, GValue* value) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(obj));
+  if (!acc) {
+    return;
+  }
+
+  memset(value, 0, sizeof(GValue));
+  double accValue = acc->CurValue();
+  if (std::isnan(accValue)) return;
+
+  g_value_init(value, G_TYPE_DOUBLE);
+  g_value_set_double(value, accValue);
+}
+
+static void getMaximumValueCB(AtkValue* obj, GValue* value) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(obj));
+  if (!acc) {
+    return;
+  }
+
+  memset(value, 0, sizeof(GValue));
+  double accValue = acc->MaxValue();
+  if (std::isnan(accValue)) return;
+
+  g_value_init(value, G_TYPE_DOUBLE);
+  g_value_set_double(value, accValue);
+}
+
+static void getMinimumValueCB(AtkValue* obj, GValue* value) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(obj));
+  if (!acc) {
+    return;
+  }
+
+  memset(value, 0, sizeof(GValue));
+  double accValue = acc->MinValue();
+  if (std::isnan(accValue)) return;
+
+  g_value_init(value, G_TYPE_DOUBLE);
+  g_value_set_double(value, accValue);
+}
+
+static void getMinimumIncrementCB(AtkValue* obj, GValue* minimumIncrement) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(obj));
+  if (!acc) {
+    return;
+  }
+
+  memset(minimumIncrement, 0, sizeof(GValue));
+  double accValue = acc->Step();
+  if (std::isnan(accValue)) {
+    accValue = 0;  // zero if the minimum increment is undefined
+  }
+
+  g_value_init(minimumIncrement, G_TYPE_DOUBLE);
+  g_value_set_double(minimumIncrement, accValue);
+}
+
+static gboolean setCurrentValueCB(AtkValue* obj, const GValue* value) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(obj));
+  if (!acc) {
+    return false;
+  }
+
+  double accValue = g_value_get_double(value);
+  return acc->SetCurValue(accValue);
+}
+
+void valueInterfaceInitCB(AtkValueIface* aIface) {
+  NS_ASSERTION(aIface, "Invalid aIface");
+  if (MOZ_UNLIKELY(!aIface)) return;
+
+  aIface->get_current_value = getCurrentValueCB;
+  aIface->get_maximum_value = getMaximumValueCB;
+  aIface->get_minimum_value = getMinimumValueCB;
+  aIface->get_minimum_increment = getMinimumIncrementCB;
+  aIface->set_current_value = setCurrentValueCB;
+}
+}
diff --git a/accessible/atk/nsStateMap.h b/accessible/atk/nsStateMap.h
new file mode 100644
index 0000000000..3587ccd6cf
--- /dev/null
+++ b/accessible/atk/nsStateMap.h
@@ -0,0 +1,116 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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 <atk/atk.h>
+#include "AccessibleWrap.h"
+
+#include <type_traits>
+
+// clang-format off
+/******************************************************************************
+The following accessible states aren't translated, just ignored:
+  STATE_READONLY:        Supported indirectly via EXT_STATE_EDITABLE
+  STATE_HOTTRACKED:      No ATK equivalent.  No known use case.
+                         The nsIAccessible state is not currently supported.
+  STATE_FLOATING:        No ATK equivalent.  No known use case.
+                         The nsIAccessible state is not currently supported.
+  STATE_MOVEABLE:        No ATK equivalent.  No known use case.
+                         The nsIAccessible state is not currently supported.
+  STATE_SELFVOICING:     No ATK equivalent -- the object has self-TTS.
+                         The nsIAccessible state is not currently supported.
+  STATE_LINKED:          The object is formatted as a hyperlink. Supported via ATK_ROLE_LINK.
+  STATE_EXTSELECTABLE:   Indicates that an object extends its selection.
+                         This is supported via STATE_MULTISELECTABLE.
+  STATE_PROTECTED:       The object is a password-protected edit control.
+                         Supported via ATK_ROLE_PASSWORD_TEXT
+  STATE_PINNED:          The object is pinned, usually indicating it is fixed in
+                         place and has permanence. No ATK equivalent. The
+                         accessible state is not currently supported.
+
+The following ATK states are not supported:
+  ATK_STATE_ARMED:       No clear use case, used briefly when button is activated
+  ATK_STATE_HAS_TOOLTIP: No clear use case, no IA2 equivalent
+  ATK_STATE_ICONIFIED:   Mozilla does not have elements which are collapsable into icons
+  ATK_STATE_TRUNCATED:   No clear use case. Indicates that an object's onscreen content is truncated,
+                         e.g. a text value in a spreadsheet cell. No IA2 state.
+******************************************************************************/
+// clang-format on
+
+enum EStateMapEntryType {
+  kMapDirectly,
+  kMapOpposite,    // For example, UNAVAILABLE is the opposite of ENABLED
+  kNoStateChange,  // Don't fire state change event
+};
+
+const AtkStateType kNone = ATK_STATE_INVALID;
+
+struct AtkStateMap {
+  AtkStateType atkState;
+  EStateMapEntryType stateMapEntryType;
+};
+
+// Map array from cross platform states to ATK states
+static const AtkStateMap gAtkStateMap[] =
+    {
+        // Cross Platform States
+        // clang-format off
+  { kNone,                                    kMapOpposite },   // states::UNAVAILABLE             = 1 << 0
+  { ATK_STATE_SELECTED,                       kMapDirectly },   // states::SELECTED                = 1 << 1
+  { ATK_STATE_FOCUSED,                        kMapDirectly },   // states::FOCUSED                 = 1 << 2
+  { ATK_STATE_PRESSED,                        kMapDirectly },   // states::PRESSED                 = 1 << 3
+  { ATK_STATE_CHECKED,                        kMapDirectly },   // states::CHECKED                 = 1 << 4
+  { ATK_STATE_INDETERMINATE,                  kMapDirectly },   // states::MIXED                   = 1 << 5
+  { kNone,                                    kMapDirectly },   // states::READONLY                = 1 << 6
+  { kNone,                                    kMapDirectly },   // states::HOTTRACKED              = 1 << 7
+  { ATK_STATE_DEFAULT,                        kMapDirectly },   // states::DEFAULT                 = 1 << 8
+  { ATK_STATE_EXPANDED,                       kMapDirectly },   // states::EXPANDED                = 1 << 9
+  { kNone,                                    kNoStateChange }, // states::COLLAPSED               = 1 << 10
+  { ATK_STATE_BUSY,                           kMapDirectly },   // states::BUSY                    = 1 << 11
+  { kNone,                                    kMapDirectly },   // states::FLOATING                = 1 << 12
+  { ATK_STATE_CHECKABLE,                      kMapDirectly },   // states::CHECKABLE               = 1 << 13
+  { ATK_STATE_ANIMATED,                       kMapDirectly },   // states::ANIMATED                = 1 << 14
+  { ATK_STATE_VISIBLE,                        kMapOpposite },   // states::INVISIBLE               = 1 << 15
+  { ATK_STATE_SHOWING,                        kMapOpposite },   // states::OFFSCREEN               = 1 << 16
+  { ATK_STATE_RESIZABLE,                      kMapDirectly },   // states::SIZEABLE                = 1 << 17
+  { kNone,                                    kMapDirectly },   // states::MOVEABLE                = 1 << 18
+  { kNone,                                    kMapDirectly },   // states::SELFVOICING             = 1 << 19
+  { ATK_STATE_FOCUSABLE,                      kMapDirectly },   // states::FOCUSABLE               = 1 << 20
+  { ATK_STATE_SELECTABLE,                     kMapDirectly },   // states::SELECTABLE              = 1 << 21
+  { kNone,                                    kMapDirectly },   // states::LINKED                  = 1 << 22
+  { ATK_STATE_VISITED,                        kMapDirectly },   // states::TRAVERSED               = 1 << 23
+  { ATK_STATE_MULTISELECTABLE,                kMapDirectly },   // states::MULTISELECTABLE         = 1 << 24
+  { kNone,                                    kMapDirectly },   // states::EXTSELECTABLE           = 1 << 25
+  { ATK_STATE_REQUIRED,                       kMapDirectly },   // states::STATE_REQUIRED          = 1 << 26
+  { kNone,                                    kMapDirectly },   // states::ALERT_MEDIUM            = 1 << 27
+  { ATK_STATE_INVALID_ENTRY,                  kMapDirectly },   // states::INVALID                 = 1 << 28
+  { kNone,                                    kMapDirectly },   // states::PROTECTED               = 1 << 29
+  { ATK_STATE_HAS_POPUP,                      kMapDirectly },   // states::HASPOPUP                = 1 << 30
+  { ATK_STATE_SUPPORTS_AUTOCOMPLETION,        kMapDirectly },   // states::SUPPORTS_AUTOCOMPLETION = 1 << 31
+  { ATK_STATE_DEFUNCT,                        kMapDirectly },   // states::DEFUNCT                 = 1 << 32
+  { ATK_STATE_SELECTABLE_TEXT,                kMapDirectly },   // states::SELECTABLE_TEXT         = 1 << 33
+  { ATK_STATE_EDITABLE,                       kMapDirectly },   // states::EDITABLE                = 1 << 34
+  { ATK_STATE_ACTIVE,                         kMapDirectly },   // states::ACTIVE                  = 1 << 35
+  { ATK_STATE_MODAL,                          kMapDirectly },   // states::MODAL                   = 1 << 36
+  { ATK_STATE_MULTI_LINE,                     kMapDirectly },   // states::MULTI_LINE              = 1 << 37
+  { ATK_STATE_HORIZONTAL,                     kMapDirectly },   // states::HORIZONTAL              = 1 << 38
+  { ATK_STATE_OPAQUE,                         kMapDirectly },   // states::OPAQUE                  = 1 << 39
+  { ATK_STATE_SINGLE_LINE,                    kMapDirectly },   // states::SINGLE_LINE             = 1 << 40
+  { ATK_STATE_TRANSIENT,                      kMapDirectly },   // states::TRANSIENT               = 1 << 41
+  { ATK_STATE_VERTICAL,                       kMapDirectly },   // states::VERTICAL                = 1 << 42
+  { ATK_STATE_STALE,                          kMapDirectly },   // states::STALE                   = 1 << 43
+  { ATK_STATE_ENABLED,                        kMapDirectly },   // states::ENABLED                 = 1 << 44
+  { ATK_STATE_SENSITIVE,                      kMapDirectly },   // states::SENSITIVE               = 1 << 45
+  { ATK_STATE_EXPANDABLE,                     kMapDirectly },   // states::EXPANDABLE              = 1 << 46
+  { kNone,                                    kMapDirectly },   // states::PINNED                  = 1 << 47
+  { ATK_STATE_ACTIVE,                         kMapDirectly }    // states::CURRENT                 = 1 << 48
+                          // clang-format on
+};
+
+static const auto gAtkStateMapLen = std::extent<decltype(gAtkStateMap)>::value;
+
+static_assert(((uint64_t)0x1) << (gAtkStateMapLen - 1) ==
+                  mozilla::a11y::states::LAST_ENTRY,
+              "ATK states map is out of sync with internal states");