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// Copyright (c) 2012 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_gtk.h"
#include <gtk/gtk.h>
#include "base/strings/utf_string_conversions.h"
#include "content/browser/accessibility/browser_accessibility_manager_gtk.h"
#include "content/common/accessibility_messages.h"
namespace content {
// The maximum length of an autogenerated unique type name string,
// generated from the 16-bit interface mask from an AtkObject.
// 30 is enough for the prefix "WAIType" + 5 hex chars (max) */
static const int kWAITypeNameLen = 30;
static gpointer browser_accessibility_parent_class = NULL;
static BrowserAccessibilityGtk* ToBrowserAccessibilityGtk(
BrowserAccessibilityAtk* atk_object) {
if (!atk_object)
return NULL;
return atk_object->m_object;
}
static BrowserAccessibilityGtk* ToBrowserAccessibilityGtk(
AtkObject* atk_object) {
if (!IS_BROWSER_ACCESSIBILITY(atk_object))
return NULL;
return ToBrowserAccessibilityGtk(BROWSER_ACCESSIBILITY(atk_object));
}
static const gchar* browser_accessibility_get_name(AtkObject* atk_object) {
BrowserAccessibilityGtk* obj = ToBrowserAccessibilityGtk(atk_object);
if (!obj)
return NULL;
return obj->atk_acc_name().c_str();
}
static const gchar* browser_accessibility_get_description(
AtkObject* atk_object) {
BrowserAccessibilityGtk* obj = ToBrowserAccessibilityGtk(atk_object);
if (!obj)
return NULL;
return obj->atk_acc_description().c_str();
}
static AtkObject* browser_accessibility_get_parent(AtkObject* atk_object) {
BrowserAccessibilityGtk* obj = ToBrowserAccessibilityGtk(atk_object);
if (!obj)
return NULL;
if (obj->parent())
return obj->parent()->ToBrowserAccessibilityGtk()->GetAtkObject();
BrowserAccessibilityManagerGtk* manager =
static_cast<BrowserAccessibilityManagerGtk*>(obj->manager());
return gtk_widget_get_accessible(manager->parent_widget());
}
static gint browser_accessibility_get_n_children(AtkObject* atk_object) {
BrowserAccessibilityGtk* obj = ToBrowserAccessibilityGtk(atk_object);
if (!obj)
return 0;
return obj->children().size();
}
static AtkObject* browser_accessibility_ref_child(
AtkObject* atk_object, gint index) {
BrowserAccessibilityGtk* obj = ToBrowserAccessibilityGtk(atk_object);
if (!obj)
return NULL;
AtkObject* result =
obj->children()[index]->ToBrowserAccessibilityGtk()->GetAtkObject();
g_object_ref(result);
return result;
}
static gint browser_accessibility_get_index_in_parent(AtkObject* atk_object) {
BrowserAccessibilityGtk* obj = ToBrowserAccessibilityGtk(atk_object);
if (!obj)
return 0;
return obj->index_in_parent();
}
static AtkAttributeSet* browser_accessibility_get_attributes(
AtkObject* atk_object) {
return NULL;
}
static AtkRole browser_accessibility_get_role(AtkObject* atk_object) {
BrowserAccessibilityGtk* obj = ToBrowserAccessibilityGtk(atk_object);
if (!obj)
return ATK_ROLE_INVALID;
return obj->atk_role();
}
static AtkStateSet* browser_accessibility_ref_state_set(AtkObject* atk_object) {
BrowserAccessibilityGtk* obj = ToBrowserAccessibilityGtk(atk_object);
if (!obj)
return NULL;
AtkStateSet* state_set =
ATK_OBJECT_CLASS(browser_accessibility_parent_class)->
ref_state_set(atk_object);
int32 state = obj->state();
if ((state >> AccessibilityNodeData::STATE_FOCUSABLE) & 1)
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);
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;
}
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<BrowserAccessibilityGtk*>(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 guint16 GetInterfaceMaskFromObject(BrowserAccessibilityGtk* obj) {
return 0;
}
static const char* GetUniqueAccessibilityTypeName(guint16 interface_mask)
{
static char name[kWAITypeNameLen + 1];
sprintf(name, "WAIType%x", interface_mask);
name[kWAITypeNameLen] = '\0';
return name;
}
static const GInterfaceInfo AtkInterfacesInitFunctions[] = {
};
enum WAIType {
WAI_ACTION,
WAI_SELECTION,
WAI_EDITABLE_TEXT,
WAI_TEXT,
WAI_COMPONENT,
WAI_IMAGE,
WAI_TABLE,
WAI_HYPERTEXT,
WAI_HYPERLINK,
WAI_DOCUMENT,
WAI_VALUE,
};
static GType GetAtkInterfaceTypeFromWAIType(WAIType type) {
switch (type) {
case WAI_ACTION:
return ATK_TYPE_ACTION;
case WAI_SELECTION:
return ATK_TYPE_SELECTION;
case WAI_EDITABLE_TEXT:
return ATK_TYPE_EDITABLE_TEXT;
case WAI_TEXT:
return ATK_TYPE_TEXT;
case WAI_COMPONENT:
return ATK_TYPE_COMPONENT;
case WAI_IMAGE:
return ATK_TYPE_IMAGE;
case WAI_TABLE:
return ATK_TYPE_TABLE;
case WAI_HYPERTEXT:
return ATK_TYPE_HYPERTEXT;
case WAI_HYPERLINK:
return ATK_TYPE_HYPERLINK_IMPL;
case WAI_DOCUMENT:
return ATK_TYPE_DOCUMENT;
case WAI_VALUE:
return ATK_TYPE_VALUE;
}
return G_TYPE_INVALID;
}
static GType GetAccessibilityTypeFromObject(BrowserAccessibilityGtk* 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 */
};
guint16 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));
for (guint i = 0; i < G_N_ELEMENTS(AtkInterfacesInitFunctions); i++) {
if (interface_mask & (1 << i)) {
g_type_add_interface_static(
type,
GetAtkInterfaceTypeFromWAIType(static_cast<WAIType>(i)),
&AtkInterfacesInitFunctions[i]);
}
}
return type;
}
BrowserAccessibilityAtk* browser_accessibility_new(
BrowserAccessibilityGtk* 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 BrowserAccessibilityGtk();
}
BrowserAccessibilityGtk* BrowserAccessibility::ToBrowserAccessibilityGtk() {
return static_cast<BrowserAccessibilityGtk*>(this);
}
BrowserAccessibilityGtk::BrowserAccessibilityGtk() {
atk_object_ = ATK_OBJECT(browser_accessibility_new(this));
}
BrowserAccessibilityGtk::~BrowserAccessibilityGtk() {
browser_accessibility_detach(BROWSER_ACCESSIBILITY(atk_object_));
g_object_unref(atk_object_);
}
AtkObject* BrowserAccessibilityGtk::GetAtkObject() const {
if (!G_IS_OBJECT(atk_object_))
return NULL;
return atk_object_;
}
void BrowserAccessibilityGtk::PreInitialize() {
BrowserAccessibility::PreInitialize();
InitRoleAndState();
if (this->parent()) {
atk_object_set_parent(
atk_object_,
this->parent()->ToBrowserAccessibilityGtk()->GetAtkObject());
}
}
bool BrowserAccessibilityGtk::IsNative() const {
return true;
}
void BrowserAccessibilityGtk::InitRoleAndState() {
atk_acc_name_ = UTF16ToUTF8(name());
string16 description;
GetStringAttribute(AccessibilityNodeData::ATTR_DESCRIPTION, &description);
atk_acc_description_ = UTF16ToUTF8(description);
switch(role_) {
case AccessibilityNodeData::ROLE_BUTTON:
atk_role_ = ATK_ROLE_PUSH_BUTTON;
break;
case AccessibilityNodeData::ROLE_CHECKBOX:
atk_role_ = ATK_ROLE_CHECK_BOX;
break;
case AccessibilityNodeData::ROLE_COMBO_BOX:
atk_role_ = ATK_ROLE_COMBO_BOX;
break;
case AccessibilityNodeData::ROLE_LINK:
atk_role_ = ATK_ROLE_LINK;
break;
case AccessibilityNodeData::ROLE_RADIO_BUTTON:
atk_role_ = ATK_ROLE_RADIO_BUTTON;
break;
case AccessibilityNodeData::ROLE_TEXTAREA:
atk_role_ = ATK_ROLE_ENTRY;
break;
case AccessibilityNodeData::ROLE_TEXT_FIELD:
atk_role_ = ATK_ROLE_ENTRY;
break;
case AccessibilityNodeData::ROLE_WEBCORE_LINK:
atk_role_ = ATK_ROLE_LINK;
break;
default:
atk_role_ = ATK_ROLE_UNKNOWN;
break;
}
}
} // namespace content
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