ATK accessibility support for web content on Aura Linux.

content/browser/accessibility/browser_accessibility_auralinux.cc

+// Copyright (c) 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "content/browser/accessibility/browser_accessibility_auralinux.h"
+
+#include "base/strings/utf_string_conversions.h"
+#include "content/browser/accessibility/browser_accessibility_manager_auralinux.h"
+#include "content/common/accessibility_messages.h"
+
+namespace content {
+
+static gpointer browser_accessibility_parent_class = NULL;
+
+static BrowserAccessibilityAuraLinux* ToBrowserAccessibilityAuraLinux(
+    BrowserAccessibilityAtk* atk_object) {
+  if (!atk_object)
+    return NULL;
+
+  return atk_object->m_object;
+}
+
+//
+// AtkComponent interface.
+//
+
+static BrowserAccessibilityAuraLinux* ToBrowserAccessibilityAuraLinux(
+    AtkComponent* atk_component) {
+  if (!IS_BROWSER_ACCESSIBILITY(atk_component))
+    return NULL;
+
+  return ToBrowserAccessibilityAuraLinux(BROWSER_ACCESSIBILITY(atk_component));
+}
+
+static AtkObject* browser_accessibility_accessible_at_point(
+    AtkComponent* atk_component,
+    gint x,
+    gint y,
+    AtkCoordType coord_type) {
+  g_return_val_if_fail(ATK_IS_COMPONENT(atk_component), 0);
+
+  BrowserAccessibilityAuraLinux* obj =
+      ToBrowserAccessibilityAuraLinux(atk_component);
+  if (!obj)
+    return NULL;
+
+  gfx::Point point(x, y);
+  if (!obj->GetGlobalBoundsRect().Contains(point))
+    return NULL;
+
+  BrowserAccessibility* result = obj->BrowserAccessibilityForPoint(point);
+  if (!result)
+    return NULL;
+
+  AtkObject* atk_result =
+      result->ToBrowserAccessibilityAuraLinux()->GetAtkObject();
+  g_object_ref(atk_result);
+  return atk_result;
+}
+
+static void browser_accessibility_get_extents(AtkComponent* atk_component,
+                                              gint* x,
+                                              gint* y,
+                                              gint* width,
+                                              gint* height,
+                                              AtkCoordType coord_type) {
+  g_return_if_fail(ATK_IS_COMPONENT(atk_component));
+
+  BrowserAccessibilityAuraLinux* obj =
+      ToBrowserAccessibilityAuraLinux(atk_component);
+  if (!obj)
+    return;
+
+  gfx::Rect bounds = obj->GetGlobalBoundsRect();
+  if (x)
+    *x = bounds.x();
+  if (y)
+    *y = bounds.y();
+  if (width)
+    *width = bounds.width();
+  if (height)
+    *height = bounds.height();
+}
+
+static gboolean browser_accessibility_grab_focus(AtkComponent* atk_component) {

[dmazzoni, 2015/05/22 22:25:32]

Please add this to ax_platform_node_auralinux too (as a separate change)!

+  g_return_val_if_fail(ATK_IS_COMPONENT(atk_component), FALSE);
+
+  BrowserAccessibilityAuraLinux* obj =
+      ToBrowserAccessibilityAuraLinux(atk_component);
+  if (!obj)
+    return false;
+
+  obj->manager()->SetFocus(obj, true);
+  return true;
+}
+
+static void ComponentInterfaceInit(AtkComponentIface* iface) {
+  iface->ref_accessible_at_point = browser_accessibility_accessible_at_point;
+  iface->get_extents = browser_accessibility_get_extents;
+  iface->grab_focus = browser_accessibility_grab_focus;
+}
+
+static const GInterfaceInfo ComponentInfo = {
+    reinterpret_cast<GInterfaceInitFunc>(ComponentInterfaceInit),
+    0,
+    0};
+
+//
+// AtkValue interface.
+//
+
+static BrowserAccessibilityAuraLinux* ToBrowserAccessibilityAuraLinux(
+    AtkValue* atk_object) {
+  if (!IS_BROWSER_ACCESSIBILITY(atk_object))
+    return NULL;
+
+  return ToBrowserAccessibilityAuraLinux(BROWSER_ACCESSIBILITY(atk_object));
+}
+
+static float getStepAttribute(BrowserAccessibilityAuraLinux* obj) {

[dmazzoni, 2015/05/22 22:25:32]

Nit: start with an uppercase: GetStepAttribute

+  // TODO(shreeram.k): Get Correct value of Step attribute.
+  return 1.0;
+}
+
+static void browser_accessibility_get_current_value(AtkValue* atk_value,
+                                                    GValue* value) {
+  g_return_if_fail(ATK_VALUE(atk_value));
+
+  BrowserAccessibilityAuraLinux* obj =
+      ToBrowserAccessibilityAuraLinux(atk_value);
+  if (!obj)
+    return;
+
+  float float_val;
+  if (obj->GetFloatAttribute(ui::AX_ATTR_VALUE_FOR_RANGE, &float_val)) {
+    memset(value, 0, sizeof(*value));
+    g_value_init(value, G_TYPE_FLOAT);
+    g_value_set_float(value, float_val);
+  }
+}
+
+static void browser_accessibility_get_minimum_value(AtkValue* atk_value,
+                                                    GValue* value) {
+  g_return_if_fail(ATK_VALUE(atk_value));
+
+  BrowserAccessibilityAuraLinux* obj =
+      ToBrowserAccessibilityAuraLinux(atk_value);
+  if (!obj)
+    return;
+
+  float float_val;
+  if (obj->GetFloatAttribute(ui::AX_ATTR_MIN_VALUE_FOR_RANGE, &float_val)) {
+    memset(value, 0, sizeof(*value));
+    g_value_init(value, G_TYPE_FLOAT);
+    g_value_set_float(value, float_val);
+  }
+}
+
+static void browser_accessibility_get_maximum_value(AtkValue* atk_value,
+                                                    GValue* value) {
+  g_return_if_fail(ATK_VALUE(atk_value));
+
+  BrowserAccessibilityAuraLinux* obj =
+      ToBrowserAccessibilityAuraLinux(atk_value);
+  if (!obj)
+    return;
+
+  float float_val;
+  if (obj->GetFloatAttribute(ui::AX_ATTR_MAX_VALUE_FOR_RANGE, &float_val)) {
+    memset(value, 0, sizeof(*value));
+    g_value_init(value, G_TYPE_FLOAT);
+    g_value_set_float(value, float_val);
+  }
+}
+
+static void browser_accessibility_get_minimum_increment(AtkValue* atk_value,
+                                                        GValue* gValue) {
+  g_return_if_fail(ATK_VALUE(atk_value));
+
+  memset(gValue, 0, sizeof(GValue));
+  g_value_init(gValue, G_TYPE_FLOAT);
+
+  BrowserAccessibilityAuraLinux* obj =
+      ToBrowserAccessibilityAuraLinux(atk_value);
+  if (!obj)
+    return;
+
+  g_value_set_float(gValue, getStepAttribute(obj));
+}
+
+static void ValueInterfaceInit(AtkValueIface* iface) {
+  iface->get_current_value = browser_accessibility_get_current_value;
+  iface->get_minimum_value = browser_accessibility_get_minimum_value;
+  iface->get_maximum_value = browser_accessibility_get_maximum_value;
+  iface->get_minimum_increment = browser_accessibility_get_minimum_increment;
+}
+
+static const GInterfaceInfo ValueInfo = {
+    reinterpret_cast<GInterfaceInitFunc>(ValueInterfaceInit),
+    0,
+    0};
+
+//
+// AtkObject interface
+//
+
+static BrowserAccessibilityAuraLinux* ToBrowserAccessibilityAuraLinux(
+    AtkObject* atk_object) {
+  if (!IS_BROWSER_ACCESSIBILITY(atk_object))
+    return NULL;
+
+  return ToBrowserAccessibilityAuraLinux(BROWSER_ACCESSIBILITY(atk_object));
+}
+
+static const gchar* browser_accessibility_get_name(AtkObject* atk_object) {
+  BrowserAccessibilityAuraLinux* obj =
+      ToBrowserAccessibilityAuraLinux(atk_object);
+  if (!obj)
+    return NULL;
+
+  return obj->GetStringAttribute(ui::AX_ATTR_NAME).c_str();
+}
+
+static const gchar* browser_accessibility_get_description(
+    AtkObject* atk_object) {
+  BrowserAccessibilityAuraLinux* obj =
+      ToBrowserAccessibilityAuraLinux(atk_object);
+  if (!obj)
+    return NULL;
+
+  return obj->GetStringAttribute(ui::AX_ATTR_DESCRIPTION).c_str();
+}
+
+static AtkObject* browser_accessibility_get_parent(AtkObject* atk_object) {
+  BrowserAccessibilityAuraLinux* obj =
+      ToBrowserAccessibilityAuraLinux(atk_object);
+  if (!obj)
+    return NULL;
+  if (obj->GetParent())
+    return obj->GetParent()->ToBrowserAccessibilityAuraLinux()->GetAtkObject();
+
+  BrowserAccessibilityManagerAuraLinux* manager =
+      static_cast<BrowserAccessibilityManagerAuraLinux*>(obj->manager());
+  return manager->parent_object();
+}
+
+static gint browser_accessibility_get_n_children(AtkObject* atk_object) {
+  BrowserAccessibilityAuraLinux* obj =
+      ToBrowserAccessibilityAuraLinux(atk_object);
+  if (!obj)
+    return 0;
+
+  return obj->PlatformChildCount();
+}
+
+static AtkObject* browser_accessibility_ref_child(AtkObject* atk_object,
+                                                  gint index) {
+  BrowserAccessibilityAuraLinux* obj =
+      ToBrowserAccessibilityAuraLinux(atk_object);
+  if (!obj)
+    return NULL;
+
+  if (index < 0 || index >= static_cast<gint>(obj->PlatformChildCount()))
+    return NULL;
+
+  AtkObject* result = obj->InternalGetChild(index)
+                          ->ToBrowserAccessibilityAuraLinux()
+                          ->GetAtkObject();
+  g_object_ref(result);
+  return result;
+}
+
+static gint browser_accessibility_get_index_in_parent(AtkObject* atk_object) {
+  BrowserAccessibilityAuraLinux* obj =
+      ToBrowserAccessibilityAuraLinux(atk_object);
+  if (!obj)
+    return 0;
+  return obj->GetIndexInParent();
+}
+
+static AtkAttributeSet* browser_accessibility_get_attributes(
+    AtkObject* atk_object) {
+  return NULL;
+}
+
+static AtkRole browser_accessibility_get_role(AtkObject* atk_object) {
+  BrowserAccessibilityAuraLinux* obj =
+      ToBrowserAccessibilityAuraLinux(atk_object);
+  if (!obj)
+    return ATK_ROLE_INVALID;
+  return obj->atk_role();
+}
+
+static AtkStateSet* browser_accessibility_ref_state_set(AtkObject* atk_object) {
+  BrowserAccessibilityAuraLinux* obj =
+      ToBrowserAccessibilityAuraLinux(atk_object);
+  if (!obj)
+    return NULL;
+  AtkStateSet* state_set = ATK_OBJECT_CLASS(browser_accessibility_parent_class)
+                               ->ref_state_set(atk_object);
+  int32 state = obj->GetState();
+
+  if (state & (1 << ui::AX_STATE_FOCUSABLE))
+    atk_state_set_add_state(state_set, ATK_STATE_FOCUSABLE);
+  if (obj->manager()->GetFocus(NULL) == obj)
+    atk_state_set_add_state(state_set, ATK_STATE_FOCUSED);
+  if (state & (1 << ui::AX_STATE_ENABLED))
+    atk_state_set_add_state(state_set, ATK_STATE_ENABLED);
+
+  return state_set;
+}
+
+static AtkRelationSet* browser_accessibility_ref_relation_set(
+    AtkObject* atk_object) {
+  AtkRelationSet* relation_set =
+      ATK_OBJECT_CLASS(browser_accessibility_parent_class)
+          ->ref_relation_set(atk_object);
+  return relation_set;
+}
+
+//
+// The rest of the BrowserAccessibilityAuraLinux code, not specific to one
+// of the Atk* interfaces.
+//
+
+static void browser_accessibility_init(AtkObject* atk_object, gpointer data) {
+  if (ATK_OBJECT_CLASS(browser_accessibility_parent_class)->initialize) {
+    ATK_OBJECT_CLASS(browser_accessibility_parent_class)
+        ->initialize(atk_object, data);
+  }
+
+  BROWSER_ACCESSIBILITY(atk_object)->m_object =
+      reinterpret_cast<BrowserAccessibilityAuraLinux*>(data);
+}
+
+static void browser_accessibility_finalize(GObject* atk_object) {
+  G_OBJECT_CLASS(browser_accessibility_parent_class)->finalize(atk_object);
+}
+
+static void browser_accessibility_class_init(AtkObjectClass* klass) {
+  GObjectClass* gobject_class = G_OBJECT_CLASS(klass);
+  browser_accessibility_parent_class = g_type_class_peek_parent(klass);
+
+  gobject_class->finalize = browser_accessibility_finalize;
+  klass->initialize = browser_accessibility_init;
+  klass->get_name = browser_accessibility_get_name;
+  klass->get_description = browser_accessibility_get_description;
+  klass->get_parent = browser_accessibility_get_parent;
+  klass->get_n_children = browser_accessibility_get_n_children;
+  klass->ref_child = browser_accessibility_ref_child;
+  klass->get_role = browser_accessibility_get_role;
+  klass->ref_state_set = browser_accessibility_ref_state_set;
+  klass->get_index_in_parent = browser_accessibility_get_index_in_parent;
+  klass->get_attributes = browser_accessibility_get_attributes;
+  klass->ref_relation_set = browser_accessibility_ref_relation_set;
+}
+
+GType browser_accessibility_get_type() {
+  static volatile gsize type_volatile = 0;
+
+  if (g_once_init_enter(&type_volatile)) {
+    static const GTypeInfo tinfo = {
+        sizeof(BrowserAccessibilityAtkClass),
+        (GBaseInitFunc)0,
+        (GBaseFinalizeFunc)0,
+        (GClassInitFunc)browser_accessibility_class_init,
+        (GClassFinalizeFunc)0,
+        0,                               /* class data */
+        sizeof(BrowserAccessibilityAtk), /* instance size */
+        0,                               /* nb preallocs */
+        (GInstanceInitFunc)0,
+        0 /* value table */
+    };
+
+    GType type = g_type_register_static(ATK_TYPE_OBJECT, "BrowserAccessibility",
+                                        &tinfo, GTypeFlags(0));
+    g_once_init_leave(&type_volatile, type);
+  }
+
+  return type_volatile;
+}
+
+static const char* GetUniqueAccessibilityTypeName(int interface_mask) {
+  // 20 characters is enough for "Chrome%x" with any integer value.
+  static char name[20];
+  snprintf(name, sizeof(name), "Chrome%x", interface_mask);
+  return name;
+}
+
+enum AtkInterfaces {
+  ATK_ACTION_INTERFACE,
+  ATK_COMPONENT_INTERFACE,
+  ATK_DOCUMENT_INTERFACE,
+  ATK_EDITABLE_TEXT_INTERFACE,
+  ATK_HYPERLINK_INTERFACE,
+  ATK_HYPERTEXT_INTERFACE,
+  ATK_IMAGE_INTERFACE,
+  ATK_SELECTION_INTERFACE,
+  ATK_TABLE_INTERFACE,
+  ATK_TEXT_INTERFACE,
+  ATK_VALUE_INTERFACE,
+};
+
+static int GetInterfaceMaskFromObject(BrowserAccessibilityAuraLinux* obj) {
+  int interface_mask = 0;
+
+  // Component interface is always supported.
+  interface_mask |= 1 << ATK_COMPONENT_INTERFACE;
+
+  int role = obj->GetRole();
+  if (role == ui::AX_ROLE_PROGRESS_INDICATOR ||
+      role == ui::AX_ROLE_SCROLL_BAR || role == ui::AX_ROLE_SLIDER) {
+    interface_mask |= 1 << ATK_VALUE_INTERFACE;
+  }
+
+  return interface_mask;
+}
+
+static GType GetAccessibilityTypeFromObject(
+    BrowserAccessibilityAuraLinux* obj) {
+  static const GTypeInfo type_info = {
+      sizeof(BrowserAccessibilityAtkClass),
+      (GBaseInitFunc)0,
+      (GBaseFinalizeFunc)0,
+      (GClassInitFunc)0,
+      (GClassFinalizeFunc)0,
+      0,                               /* class data */
+      sizeof(BrowserAccessibilityAtk), /* instance size */
+      0,                               /* nb preallocs */
+      (GInstanceInitFunc)0,
+      0 /* value table */
+  };
+
+  int interface_mask = GetInterfaceMaskFromObject(obj);
+  const char* atk_type_name = GetUniqueAccessibilityTypeName(interface_mask);
+  GType type = g_type_from_name(atk_type_name);
+  if (type)
+    return type;
+
+  type = g_type_register_static(BROWSER_ACCESSIBILITY_TYPE, atk_type_name,
+                                &type_info, GTypeFlags(0));
+  if (interface_mask & (1 << ATK_COMPONENT_INTERFACE))
+    g_type_add_interface_static(type, ATK_TYPE_COMPONENT, &ComponentInfo);
+  if (interface_mask & (1 << ATK_VALUE_INTERFACE))
+    g_type_add_interface_static(type, ATK_TYPE_VALUE, &ValueInfo);
+
+  return type;
+}
+
+BrowserAccessibilityAtk* browser_accessibility_new(
+    BrowserAccessibilityAuraLinux* obj) {
+  GType type = GetAccessibilityTypeFromObject(obj);
+  AtkObject* atk_object = static_cast<AtkObject*>(g_object_new(type, 0));
+
+  atk_object_initialize(atk_object, obj);
+
+  return BROWSER_ACCESSIBILITY(atk_object);
+}
+
+void browser_accessibility_detach(BrowserAccessibilityAtk* atk_object) {
+  atk_object->m_object = NULL;
+}
+
+// static
+BrowserAccessibility* BrowserAccessibility::Create() {
+  return new BrowserAccessibilityAuraLinux();
+}
+
+BrowserAccessibilityAuraLinux*
+BrowserAccessibility::ToBrowserAccessibilityAuraLinux() {
+  return static_cast<BrowserAccessibilityAuraLinux*>(this);
+}
+
+BrowserAccessibilityAuraLinux::BrowserAccessibilityAuraLinux()
+    : atk_object_(NULL) {
+}
+
+BrowserAccessibilityAuraLinux::~BrowserAccessibilityAuraLinux() {
+  browser_accessibility_detach(BROWSER_ACCESSIBILITY(atk_object_));
+  if (atk_object_)
+    g_object_unref(atk_object_);
+}
+
+AtkObject* BrowserAccessibilityAuraLinux::GetAtkObject() const {
+  if (!G_IS_OBJECT(atk_object_))
+    return NULL;
+  return atk_object_;
+}
+
+void BrowserAccessibilityAuraLinux::OnDataChanged() {
+  BrowserAccessibility::OnDataChanged();
+  InitRoleAndState();
+
+  if (atk_object_) {
+    // If the object's role changes and that causes its
+    // interface mask to change, we need to create a new
+    // AtkObject for it.
+    int interface_mask = GetInterfaceMaskFromObject(this);
+    if (interface_mask != interface_mask_) {
+      g_object_unref(atk_object_);
+      atk_object_ = NULL;
+    }
+  }
+
+  if (!atk_object_) {
+    interface_mask_ = GetInterfaceMaskFromObject(this);
+    atk_object_ = ATK_OBJECT(browser_accessibility_new(this));
+    if (this->GetParent()) {
+      atk_object_set_parent(
+          atk_object_,
+          this->GetParent()->ToBrowserAccessibilityAuraLinux()->GetAtkObject());
+    }
+  }
+}
+
+bool BrowserAccessibilityAuraLinux::IsNative() const {
+  return true;
+}
+
+void BrowserAccessibilityAuraLinux::InitRoleAndState() {
+  switch (GetRole()) {
+    case ui::AX_ROLE_DOCUMENT:
+    case ui::AX_ROLE_ROOT_WEB_AREA:
+    case ui::AX_ROLE_WEB_AREA:
+      atk_role_ = ATK_ROLE_DOCUMENT_WEB;
+      break;
+    case ui::AX_ROLE_ALERT:
+    case ui::AX_ROLE_ALERT_DIALOG:
+      atk_role_ = ATK_ROLE_ALERT;
+      break;
+    case ui::AX_ROLE_APPLICATION:
+      atk_role_ = ATK_ROLE_APPLICATION;
+      break;
+    case ui::AX_ROLE_BUTTON:
+      atk_role_ = ATK_ROLE_PUSH_BUTTON;
+      break;
+    case ui::AX_ROLE_CANVAS:
+      atk_role_ = ATK_ROLE_CANVAS;
+      break;
+    case ui::AX_ROLE_CAPTION:
+      atk_role_ = ATK_ROLE_CAPTION;
+      break;
+    case ui::AX_ROLE_CHECK_BOX:
+      atk_role_ = ATK_ROLE_CHECK_BOX;
+      break;
+    case ui::AX_ROLE_COLOR_WELL:
+      atk_role_ = ATK_ROLE_COLOR_CHOOSER;
+      break;
+    case ui::AX_ROLE_COLUMN_HEADER:
+      atk_role_ = ATK_ROLE_COLUMN_HEADER;
+      break;
+    case ui::AX_ROLE_COMBO_BOX:
+      atk_role_ = ATK_ROLE_COMBO_BOX;
+      break;
+    case ui::AX_ROLE_DATE:
+    case ui::AX_ROLE_DATE_TIME:
+      atk_role_ = ATK_ROLE_DATE_EDITOR;
+      break;
+    case ui::AX_ROLE_DIALOG:
+      atk_role_ = ATK_ROLE_DIALOG;
+      break;
+    case ui::AX_ROLE_DIV:
+    case ui::AX_ROLE_GROUP:
+      atk_role_ = ATK_ROLE_SECTION;
+      break;
+    case ui::AX_ROLE_FORM:
+      atk_role_ = ATK_ROLE_FORM;
+      break;
+    case ui::AX_ROLE_IMAGE:
+      atk_role_ = ATK_ROLE_IMAGE;
+      break;
+    case ui::AX_ROLE_IMAGE_MAP:
+      atk_role_ = ATK_ROLE_IMAGE_MAP;
+      break;
+    case ui::AX_ROLE_LABEL_TEXT:
+      atk_role_ = ATK_ROLE_LABEL;
+      break;
+    case ui::AX_ROLE_LINK:
+      atk_role_ = ATK_ROLE_LINK;
+      break;
+    case ui::AX_ROLE_LIST:
+      atk_role_ = ATK_ROLE_LIST;
+      break;
+    case ui::AX_ROLE_LIST_BOX:
+      atk_role_ = ATK_ROLE_LIST_BOX;
+      break;
+    case ui::AX_ROLE_LIST_ITEM:
+      atk_role_ = ATK_ROLE_LIST_ITEM;
+      break;
+    case ui::AX_ROLE_MENU:
+      atk_role_ = ATK_ROLE_MENU;
+      break;
+    case ui::AX_ROLE_MENU_BAR:
+      atk_role_ = ATK_ROLE_MENU_BAR;
+      break;
+    case ui::AX_ROLE_MENU_ITEM:
+      atk_role_ = ATK_ROLE_MENU_ITEM;
+      break;
+    case ui::AX_ROLE_MENU_ITEM_CHECK_BOX:
+      atk_role_ = ATK_ROLE_CHECK_MENU_ITEM;
+      break;
+    case ui::AX_ROLE_MENU_ITEM_RADIO:
+      atk_role_ = ATK_ROLE_RADIO_MENU_ITEM;
+      break;
+    case ui::AX_ROLE_METER:
+      atk_role_ = ATK_ROLE_PROGRESS_BAR;
+      break;
+    case ui::AX_ROLE_PARAGRAPH:
+      atk_role_ = ATK_ROLE_PARAGRAPH;
+      break;
+    case ui::AX_ROLE_RADIO_BUTTON:
+      atk_role_ = ATK_ROLE_RADIO_BUTTON;
+      break;
+    case ui::AX_ROLE_ROW_HEADER:
+      atk_role_ = ATK_ROLE_ROW_HEADER;
+      break;
+    case ui::AX_ROLE_SCROLL_BAR:
+      atk_role_ = ATK_ROLE_SCROLL_BAR;
+      break;
+    case ui::AX_ROLE_SLIDER:
+      atk_role_ = ATK_ROLE_SLIDER;
+      break;
+    case ui::AX_ROLE_SPIN_BUTTON:
+      atk_role_ = ATK_ROLE_SPIN_BUTTON;
+      break;
+    case ui::AX_ROLE_SPLITTER:
+      atk_role_ = ATK_ROLE_SEPARATOR;
+      break;
+    case ui::AX_ROLE_STATIC_TEXT:
+      atk_role_ = ATK_ROLE_TEXT;
+      break;
+    case ui::AX_ROLE_STATUS:
+      atk_role_ = ATK_ROLE_STATUSBAR;
+      break;
+    case ui::AX_ROLE_TAB:
+      atk_role_ = ATK_ROLE_PAGE_TAB;
+      break;
+    case ui::AX_ROLE_TABLE:
+      atk_role_ = ATK_ROLE_TABLE;
+      break;
+    case ui::AX_ROLE_TAB_LIST:
+      atk_role_ = ATK_ROLE_PAGE_TAB_LIST;
+      break;
+    case ui::AX_ROLE_TOGGLE_BUTTON:
+      atk_role_ = ATK_ROLE_TOGGLE_BUTTON;
+      break;
+    case ui::AX_ROLE_TOOLBAR:
+      atk_role_ = ATK_ROLE_TOOL_BAR;
+      break;
+    case ui::AX_ROLE_TOOLTIP:
+      atk_role_ = ATK_ROLE_TOOL_TIP;
+      break;
+    case ui::AX_ROLE_TEXT_FIELD:
+      atk_role_ = ATK_ROLE_ENTRY;
+      break;
+    case ui::AX_ROLE_TREE:
+      atk_role_ = ATK_ROLE_TREE;
+      break;
+    case ui::AX_ROLE_TREE_ITEM:
+      atk_role_ = ATK_ROLE_TREE_ITEM;
+      break;
+    default:
+      atk_role_ = ATK_ROLE_UNKNOWN;
+      break;
+  }
+}
+
+}  // namespace content