Re-land: Resurrect Aura Linux accessibility.

ui/accessibility/platform/ax_platform_node_auralinux.cc

+// Copyright 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 "ui/accessibility/platform/ax_platform_node_auralinux.h"
+
+#include "base/command_line.h"
+#include "base/strings/sys_string_conversions.h"
+#include "ui/accessibility/ax_node_data.h"
+#include "ui/accessibility/platform/atk_util_auralinux.h"
+#include "ui/accessibility/platform/ax_platform_node_delegate.h"
+
+//
+// ax_platform_node_auralinux AtkObject definition and implementation.
+//
+
+G_BEGIN_DECLS
+
+#define AX_PLATFORM_NODE_AURALINUX_TYPE (ax_platform_node_auralinux_get_type())
+#define AX_PLATFORM_NODE_AURALINUX(obj) \
+    (G_TYPE_CHECK_INSTANCE_CAST( \
+        (obj), AX_PLATFORM_NODE_AURALINUX_TYPE, AXPlatformNodeAuraLinuxObject))
+#define AX_PLATFORM_NODE_AURALINUX_CLASS(klass) \
+    (G_TYPE_CHECK_CLASS_CAST( \
+        (klass), AX_PLATFORM_NODE_AURALINUX_TYPE, AXPlatformNodeAuraLinuxClass))
+#define IS_AX_PLATFORM_NODE_AURALINUX(obj) \
+    (G_TYPE_CHECK_INSTANCE_TYPE((obj), AX_PLATFORM_NODE_AURALINUX_TYPE))
+#define IS_AX_PLATFORM_NODE_AURALINUX_CLASS(klass) \
+    (G_TYPE_CHECK_CLASS_TYPE((klass), AX_PLATFORM_NODE_AURALINUX_TYPE))
+#define AX_PLATFORM_NODE_AURALINUX_GET_CLASS(obj) \
+    (G_TYPE_INSTANCE_GET_CLASS( \
+        (obj), AX_PLATFORM_NODE_AURALINUX_TYPE, AXPlatformNodeAuraLinuxClass))
+
+typedef struct _AXPlatformNodeAuraLinuxObject AXPlatformNodeAuraLinuxObject;
+typedef struct _AXPlatformNodeAuraLinuxClass AXPlatformNodeAuraLinuxClass;
+
+struct _AXPlatformNodeAuraLinuxObject {
+  AtkObject parent;
+  ui::AXPlatformNodeAuraLinux* m_object;
+};
+
+struct _AXPlatformNodeAuraLinuxClass {
+  AtkObjectClass parent_class;
+};
+
+GType ax_platform_node_auralinux_get_type();
+
+static ui::AXPlatformNodeAuraLinux* ToAXPlatformNodeAuraLinux(
+    AXPlatformNodeAuraLinuxObject* atk_object) {
+  if (!atk_object)
+    return nullptr;
+
+  return atk_object->m_object;
+}
+
+static ui::AXPlatformNodeAuraLinux* AtkObjectToAXPlatformNodeAuraLinux(
+    AtkObject* atk_object) {
+  if (!atk_object)
+    return nullptr;
+
+  if (IS_AX_PLATFORM_NODE_AURALINUX(atk_object))
+    return ToAXPlatformNodeAuraLinux(AX_PLATFORM_NODE_AURALINUX(atk_object));
+
+  return nullptr;
+}
+
+static const gchar* ax_platform_node_auralinux_get_name(AtkObject* atk_object) {
+  ui::AXPlatformNodeAuraLinux* obj =
+      AtkObjectToAXPlatformNodeAuraLinux(atk_object);
+  if (!obj)
+    return nullptr;
+
+  return obj->GetStringAttribute(ui::AX_ATTR_NAME).c_str();
+}
+
+static const gchar* ax_platform_node_auralinux_get_description(
+    AtkObject* atk_object) {
+  ui::AXPlatformNodeAuraLinux* obj =
+      AtkObjectToAXPlatformNodeAuraLinux(atk_object);
+  if (!obj)
+    return nullptr;
+
+  return obj->GetStringAttribute(
+      ui::AX_ATTR_DESCRIPTION).c_str();
+}
+
+static AtkObject* ax_platform_node_auralinux_get_parent(AtkObject* atk_object) {
+  ui::AXPlatformNodeAuraLinux* obj =
+      AtkObjectToAXPlatformNodeAuraLinux(atk_object);
+  if (!obj)
+    return nullptr;
+
+  return obj->GetParent();
+}
+
+static gint ax_platform_node_auralinux_get_n_children(AtkObject* atk_object) {
+  ui::AXPlatformNodeAuraLinux* obj =
+      AtkObjectToAXPlatformNodeAuraLinux(atk_object);
+  if (!obj)
+    return 0;
+
+  return obj->GetChildCount();
+}
+
+static AtkObject* ax_platform_node_auralinux_ref_child(
+    AtkObject* atk_object, gint index) {
+  ui::AXPlatformNodeAuraLinux* obj =
+      AtkObjectToAXPlatformNodeAuraLinux(atk_object);
+  if (!obj)
+    return nullptr;
+
+  AtkObject* result = obj->ChildAtIndex(index);
+  if (result)
+    g_object_ref(result);
+  return result;
+}
+
+static AtkRole ax_platform_node_auralinux_get_role(AtkObject* atk_object) {
+  ui::AXPlatformNodeAuraLinux* obj =
+      AtkObjectToAXPlatformNodeAuraLinux(atk_object);
+  if (!obj)
+    return ATK_ROLE_INVALID;
+  return obj->GetAtkRole();
+}
+
+//
+// The rest of the AXPlatformNodeAuraLinux code, not specific to one
+// of the Atk* interfaces.
+//
+
+static gpointer ax_platform_node_auralinux_parent_class = nullptr;
+
+static void ax_platform_node_auralinux_init(AtkObject* atk_object,
+                                            gpointer data) {
+  if (ATK_OBJECT_CLASS(ax_platform_node_auralinux_parent_class)->initialize) {
+    ATK_OBJECT_CLASS(ax_platform_node_auralinux_parent_class)->initialize(
+        atk_object, data);
+  }
+
+  AX_PLATFORM_NODE_AURALINUX(atk_object)->m_object =
+      reinterpret_cast<ui::AXPlatformNodeAuraLinux*>(data);
+}
+
+static void ax_platform_node_auralinux_finalize(GObject* atk_object) {
+  G_OBJECT_CLASS(ax_platform_node_auralinux_parent_class)->finalize(atk_object);
+}
+
+static void ax_platform_node_auralinux_class_init(AtkObjectClass* klass) {
+  GObjectClass* gobject_class = G_OBJECT_CLASS(klass);
+  ax_platform_node_auralinux_parent_class = g_type_class_peek_parent(klass);
+
+  gobject_class->finalize = ax_platform_node_auralinux_finalize;
+  klass->initialize = ax_platform_node_auralinux_init;
+  klass->get_name = ax_platform_node_auralinux_get_name;
+  klass->get_description = ax_platform_node_auralinux_get_description;
+  klass->get_parent = ax_platform_node_auralinux_get_parent;
+  klass->get_n_children = ax_platform_node_auralinux_get_n_children;
+  klass->ref_child = ax_platform_node_auralinux_ref_child;
+  klass->get_role = ax_platform_node_auralinux_get_role;
+}
+
+GType ax_platform_node_auralinux_get_type() {
+  static volatile gsize type_volatile = 0;
+
+  if (g_once_init_enter(&type_volatile)) {
+    static const GTypeInfo tinfo = {
+      sizeof(AXPlatformNodeAuraLinuxClass),
+      (GBaseInitFunc) 0,
+      (GBaseFinalizeFunc) 0,
+      (GClassInitFunc) ax_platform_node_auralinux_class_init,
+      (GClassFinalizeFunc) 0,
+      0, /* class data */
+      sizeof(AXPlatformNodeAuraLinuxObject), /* instance size */
+      0, /* nb preallocs */
+      (GInstanceInitFunc) 0,
+      0 /* value table */
+    };
+
+    GType type = g_type_register_static(
+        ATK_TYPE_OBJECT, "AXPlatformNodeAuraLinux", &tinfo, GTypeFlags(0));
+    g_once_init_leave(&type_volatile, type);
+  }
+
+  return type_volatile;
+}
+
+AXPlatformNodeAuraLinuxObject* ax_platform_node_auralinux_new(
+    ui::AXPlatformNodeAuraLinux* obj) {
+  #if !GLIB_CHECK_VERSION(2, 36, 0)
+  static bool first_time = true;
+  if (first_time) {
+    g_type_init();
+    first_time = false;
+  }
+  #endif
+
+  GType type = AX_PLATFORM_NODE_AURALINUX_TYPE;
+  AtkObject* atk_object = static_cast<AtkObject*>(g_object_new(type, 0));
+  atk_object_initialize(atk_object, obj);
+  return AX_PLATFORM_NODE_AURALINUX(atk_object);
+}
+
+void ax_platform_node_auralinux_detach(
+    AXPlatformNodeAuraLinuxObject* atk_object) {
+  atk_object->m_object = nullptr;
+}
+
+G_END_DECLS
+
+//
+// AXPlatformNodeAuraLinux implementation.
+//
+
+namespace ui {
+
+// static
+AXPlatformNode* AXPlatformNode::Create(AXPlatformNodeDelegate* delegate) {
+  AXPlatformNodeAuraLinux* node = new AXPlatformNodeAuraLinux();
+  node->Init(delegate);
+  return node;
+}
+
+// static
+AXPlatformNode* AXPlatformNodeAuraLinux::application_ = nullptr;
+
+// static
+void AXPlatformNodeAuraLinux::SetApplication(AXPlatformNode* application) {
+  application_ = application;
+  AtkUtilAuraLinux::GetInstance();
+}
+
+AtkRole AXPlatformNodeAuraLinux::GetAtkRole() {
+  switch (GetData().role) {
+    case ui::AX_ROLE_APPLICATION:
+      return ATK_ROLE_APPLICATION;
+    case ui::AX_ROLE_BUTTON:
+      return ATK_ROLE_PUSH_BUTTON;
+    case ui::AX_ROLE_CHECK_BOX:
+      return ATK_ROLE_CHECK_BOX;
+    case ui::AX_ROLE_COMBO_BOX:
+      return ATK_ROLE_COMBO_BOX;
+    case ui::AX_ROLE_STATIC_TEXT:
+      return ATK_ROLE_TEXT;
+    case ui::AX_ROLE_TEXT_FIELD:
+      return ATK_ROLE_ENTRY;
+    case ui::AX_ROLE_WINDOW:
+      return ATK_ROLE_WINDOW;
+    default:
+      return ATK_ROLE_UNKNOWN;
+  }
+}
+
+AXPlatformNodeAuraLinux::AXPlatformNodeAuraLinux()
+    : atk_object_(nullptr) {
+}
+
+AXPlatformNodeAuraLinux::~AXPlatformNodeAuraLinux() {
+  g_object_unref(atk_object_);
+}
+
+void AXPlatformNodeAuraLinux::Init(AXPlatformNodeDelegate* delegate) {
+  // Initialize ATK.
+  AXPlatformNodeBase::Init(delegate);
+  atk_object_ = ATK_OBJECT(ax_platform_node_auralinux_new(this));
+}
+
+void AXPlatformNodeAuraLinux::Destroy() {
+  delegate_ = nullptr;
+  delete this;
+}
+
+gfx::NativeViewAccessible AXPlatformNodeAuraLinux::GetNativeViewAccessible() {
+  return atk_object_;
+}
+
+void AXPlatformNodeAuraLinux::NotifyAccessibilityEvent(ui::AXEvent event_type) {
+}
+
+int AXPlatformNodeAuraLinux::GetIndexInParent() {
+  return 0;
+}
+
+}  // namespace ui