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/*******************************************************************************
* Copyright (c) 2000, 2003 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Common Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/cpl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.swt.accessibility;
import java.util.*;
import org.eclipse.swt.internal.*;
import org.eclipse.swt.internal.accessibility.gtk.*;
import org.eclipse.swt.internal.gtk.*;
class AccessibleFactory {
int /*long*/ handle;
int /*long*/ objectParentType;
int /*long*/ widgetTypeName;
Callback atkObjectFactoryCB_create_accessible;
Callback gTypeInfo_base_init_factory;
Hashtable accessibles = new Hashtable (9);
static final Hashtable Types = new Hashtable (9);
static final Hashtable Factories = new Hashtable (9);
static final int /*long*/ DefaultParentType = ATK.g_type_from_name (Converter.wcsToMbcs (null, "GtkAccessible", true));
static final byte[] FACTORY_PARENTTYPENAME = Converter.wcsToMbcs (null, "AtkObjectFactory", true);
static final byte[] SWT_TYPE_PREFIX = Converter.wcsToMbcs (null, "SWT", false);
static final byte[] CHILD_TYPENAME = Converter.wcsToMbcs (null, "Child", false);
static final byte[] FACTORY_TYPENAME = Converter.wcsToMbcs (null, "SWTFactory", true);
static final int[] actionRoles = {
ACC.ROLE_CHECKBUTTON, ACC.ROLE_COMBOBOX, ACC.ROLE_LINK,
ACC.ROLE_MENUITEM, ACC.ROLE_PUSHBUTTON, ACC.ROLE_RADIOBUTTON,
};
static final int[] hypertextRoles = {ACC.ROLE_LINK};
static final int[] selectionRoles = {
ACC.ROLE_LIST, ACC.ROLE_TABFOLDER, ACC.ROLE_TABLE, ACC.ROLE_TREE,
};
static final int[] textRoles = {
ACC.ROLE_COMBOBOX, ACC.ROLE_LINK, ACC.ROLE_LABEL, ACC.ROLE_TEXT,
};
/* AT callbacks*/
static final Callback AtkActionCB_get_keybinding;
static final Callback AtkActionCB_get_name;
static final Callback AtkComponentCB_get_extents;
static final Callback AtkComponentCB_get_position;
static final Callback AtkComponentCB_get_size;
static final Callback AtkComponentCB_ref_accessible_at_point;
static final Callback AtkHypertextCB_get_link;
static final Callback AtkHypertextCB_get_n_links;
static final Callback AtkHypertextCB_get_link_index;
static final Callback AtkObjectCB_get_description;
static final Callback AtkObjectCB_get_index_in_parent;
static final Callback AtkObjectCB_get_n_children;
static final Callback AtkObjectCB_get_name;
static final Callback AtkObjectCB_get_parent;
static final Callback AtkObjectCB_get_role;
static final Callback AtkObjectCB_ref_child;
static final Callback AtkObjectCB_ref_state_set;
static final Callback AtkSelectionCB_is_child_selected;
static final Callback AtkSelectionCB_ref_selection;
static final Callback AtkTextCB_get_caret_offset;
static final Callback AtkTextCB_get_n_selections;
static final Callback AtkTextCB_get_selection;
static final Callback AtkTextCB_get_text;
static final Callback AtkTextCB_get_text_after_offset;
static final Callback AtkTextCB_get_text_at_offset;
static final Callback AtkTextCB_get_text_before_offset;
static final Callback AtkTextCB_get_character_at_offset;
static final Callback AtkTextCB_get_character_count;
static final Callback GObjectClass_finalize;
/* interface initialization callbacks */
static final Callback InitActionIfaceCB;
static final Callback InitComponentIfaceCB;
static final Callback InitHypertextIfaceCB;
static final Callback GTypeInfo_base_init_type;
static final Callback InitSelectionIfaceCB;
static final Callback InitTextIfaceCB;
/* interface definitions */
static int /*long*/ ObjectIfaceDefinition;
static final int /*long*/ ActionIfaceDefinition;
static final int /*long*/ ComponentIfaceDefinition;
static final int /*long*/ HypertextIfaceDefinition;
static final int /*long*/ SelectionIfaceDefinition;
static final int /*long*/ TextIfaceDefinition;
static {
AtkActionCB_get_keybinding = new Callback (AccessibleObject.class, "atkAction_get_keybinding", 2);
AtkActionCB_get_name = new Callback (AccessibleObject.class, "atkAction_get_name", 2);
AtkComponentCB_get_extents = new Callback (AccessibleObject.class, "atkComponent_get_extents", 6);
AtkComponentCB_get_position = new Callback (AccessibleObject.class, "atkComponent_get_position", 4);
AtkComponentCB_get_size = new Callback (AccessibleObject.class, "atkComponent_get_size", 4);
AtkComponentCB_ref_accessible_at_point = new Callback (AccessibleObject.class, "atkComponent_ref_accessible_at_point", 4);
AtkHypertextCB_get_link = new Callback (AccessibleObject.class, "atkHypertext_get_link", 2);
AtkHypertextCB_get_n_links = new Callback (AccessibleObject.class, "atkHypertext_get_n_links", 1);
AtkHypertextCB_get_link_index = new Callback (AccessibleObject.class, "atkHypertext_get_link_index", 2);
AtkObjectCB_get_name = new Callback (AccessibleObject.class, "atkObject_get_name", 1);
AtkObjectCB_get_description = new Callback (AccessibleObject.class, "atkObject_get_description", 1);
AtkObjectCB_get_n_children = new Callback (AccessibleObject.class, "atkObject_get_n_children", 1);
AtkObjectCB_get_role = new Callback (AccessibleObject.class, "atkObject_get_role", 1);
AtkObjectCB_get_parent = new Callback (AccessibleObject.class, "atkObject_get_parent", 1);
AtkObjectCB_ref_state_set = new Callback (AccessibleObject.class, "atkObject_ref_state_set", 1);
AtkObjectCB_get_index_in_parent = new Callback (AccessibleObject.class, "atkObject_get_index_in_parent", 1);
AtkObjectCB_ref_child = new Callback (AccessibleObject.class, "atkObject_ref_child", 2);
AtkSelectionCB_is_child_selected = new Callback (AccessibleObject.class, "atkSelection_is_child_selected", 2);
AtkSelectionCB_ref_selection = new Callback (AccessibleObject.class, "atkSelection_ref_selection", 2);
AtkTextCB_get_caret_offset = new Callback (AccessibleObject.class, "atkText_get_caret_offset", 1);
AtkTextCB_get_n_selections = new Callback (AccessibleObject.class, "atkText_get_n_selections", 1);
AtkTextCB_get_selection = new Callback (AccessibleObject.class, "atkText_get_selection", 4);
AtkTextCB_get_text = new Callback (AccessibleObject.class, "atkText_get_text", 3);
AtkTextCB_get_text_after_offset = new Callback (AccessibleObject.class, "atkText_get_text_after_offset", 5);
AtkTextCB_get_text_at_offset = new Callback (AccessibleObject.class, "atkText_get_text_at_offset", 5);
AtkTextCB_get_text_before_offset = new Callback (AccessibleObject.class, "atkText_get_text_before_offset", 5);
AtkTextCB_get_character_at_offset = new Callback (AccessibleObject.class, "atkText_get_character_at_offset", 2);
AtkTextCB_get_character_count = new Callback (AccessibleObject.class, "atkText_get_character_count", 1);
GObjectClass_finalize = new Callback (AccessibleObject.class, "gObjectClass_finalize", 1);
GTypeInfo_base_init_type = new Callback (AccessibleFactory.class, "gTypeInfo_base_init_type", 1);
/* Action interface */
InitActionIfaceCB = new Callback (AccessibleFactory.class, "initActionIfaceCB", 1);
GInterfaceInfo interfaceInfo = new GInterfaceInfo ();
interfaceInfo.interface_init = InitActionIfaceCB.getAddress ();
ActionIfaceDefinition = OS.g_malloc (GInterfaceInfo.sizeof);
ATK.memmove (ActionIfaceDefinition, interfaceInfo, GInterfaceInfo.sizeof);
/* Component interface */
InitComponentIfaceCB = new Callback (AccessibleFactory.class, "initComponentIfaceCB", 1);
interfaceInfo = new GInterfaceInfo ();
interfaceInfo.interface_init = InitComponentIfaceCB.getAddress ();
ComponentIfaceDefinition = OS.g_malloc (GInterfaceInfo.sizeof);
ATK.memmove (ComponentIfaceDefinition, interfaceInfo, GInterfaceInfo.sizeof);
/* Hypertext interface */
InitHypertextIfaceCB = new Callback (AccessibleFactory.class, "initHypertextIfaceCB", 1);
interfaceInfo = new GInterfaceInfo ();
interfaceInfo.interface_init = InitHypertextIfaceCB.getAddress ();
HypertextIfaceDefinition = OS.g_malloc (GInterfaceInfo.sizeof);
ATK.memmove (HypertextIfaceDefinition, interfaceInfo, GInterfaceInfo.sizeof);
/* Selection interface */
InitSelectionIfaceCB = new Callback (AccessibleFactory.class, "initSelectionIfaceCB", 1);
interfaceInfo = new GInterfaceInfo ();
interfaceInfo.interface_init = InitSelectionIfaceCB.getAddress ();
SelectionIfaceDefinition = OS.g_malloc (GInterfaceInfo.sizeof);
ATK.memmove (SelectionIfaceDefinition, interfaceInfo, GInterfaceInfo.sizeof);
/* Text interface */
InitTextIfaceCB = new Callback (AccessibleFactory.class, "initTextIfaceCB", 1);
interfaceInfo = new GInterfaceInfo ();
interfaceInfo.interface_init = InitTextIfaceCB.getAddress ();
TextIfaceDefinition = OS.g_malloc (GInterfaceInfo.sizeof);
ATK.memmove (TextIfaceDefinition, interfaceInfo, GInterfaceInfo.sizeof);
}
private AccessibleFactory (int /*long*/ widgetType) {
super ();
/* If DefaultParentType is 0 then OS accessibility is not active */
if (DefaultParentType == 0) return;
widgetTypeName = ATK.g_type_name (widgetType);
int widgetTypeNameLength = OS.strlen (widgetTypeName) + 1;
byte[] buffer = new byte [widgetTypeNameLength];
OS.memmove (buffer, widgetTypeName, widgetTypeNameLength);
byte[] factoryName = new byte [FACTORY_TYPENAME.length + widgetTypeNameLength];
System.arraycopy (FACTORY_TYPENAME, 0, factoryName, 0, FACTORY_TYPENAME.length);
System.arraycopy (buffer, 0, factoryName, FACTORY_TYPENAME.length, widgetTypeNameLength);
if (ATK.g_type_from_name (factoryName) == 0) {
/* register the factory */
int /*long*/ registry = ATK.atk_get_default_registry ();
int /*long*/ previousFactory = ATK.atk_registry_get_factory (registry, widgetType);
objectParentType = ATK.atk_object_factory_get_accessible_type (previousFactory);
if (objectParentType == 0) objectParentType = DefaultParentType;
int /*long*/ factoryParentType = ATK.g_type_from_name (FACTORY_PARENTTYPENAME);
gTypeInfo_base_init_factory = new Callback (this, "gTypeInfo_base_init_factory", 1);
GTypeInfo typeInfo = new GTypeInfo ();
typeInfo.base_init = gTypeInfo_base_init_factory.getAddress ();
typeInfo.class_size = (short)ATK.AtkObjectFactoryClass_sizeof ();
typeInfo.instance_size = (short)ATK.AtkObjectFactory_sizeof ();
handle = OS.g_malloc (GTypeInfo.sizeof);
ATK.memmove (handle, typeInfo, GTypeInfo.sizeof);
int /*long*/ swtFactory = ATK.g_type_register_static (factoryParentType, factoryName, handle, 0);
ATK.atk_registry_set_factory_type (registry, widgetType, swtFactory);
}
}
void addAccessible (Accessible accessible) {
int /*long*/ controlHandle = accessible.getControlHandle ();
accessibles.put (new LONG (controlHandle), accessible);
}
int /*long*/ atkObjectFactory_create_accessible (int /*long*/ widget) {
Accessible accessible = (Accessible) accessibles.get (new LONG (widget));
if (accessible == null) {
/*
* we don't care about this control, so create it with the parent's
* type so that its accessibility callbacks will not pass though here
*/
int /*long*/ result = ATK.g_object_new (objectParentType, 0);
ATK.atk_object_initialize (result, widget);
return result;
}
int typeNameLength = OS.strlen (widgetTypeName);
byte[] buffer = new byte [typeNameLength];
OS.memmove (buffer, widgetTypeName, typeNameLength);
int /*long*/ type = getType (buffer, accessible, objectParentType, ACC.CHILDID_SELF);
AccessibleObject object = new AccessibleObject (type, widget, accessible, objectParentType, false);
accessible.accessibleObject = object;
return object.handle;
}
static int /*long*/ getChildType (Accessible accessible, int childIndex) {
return getType (CHILD_TYPENAME, accessible, DefaultParentType, childIndex);
}
static int /*long*/ getDefaultParentType () {
return DefaultParentType;
}
static int /*long*/ getType (byte[] widgetTypeName, Accessible accessible, int /*long*/ parentType, int childId) {
AccessibleControlEvent event = new AccessibleControlEvent (accessible);
event.childID = childId;
AccessibleControlListener[] listeners = accessible.getControlListeners ();
for (int i = 0; i < listeners.length; i++) {
listeners [i].getRole (event);
}
boolean action = false, hypertext = false, selection = false, text = false;
if (event.detail != 0) { /* a role was specified */
for (int i = 0; i < actionRoles.length; i++) {
if (event.detail == actionRoles [i]) {
action = true;
break;
}
}
for (int i = 0; i < hypertextRoles.length; i++) {
if (event.detail == hypertextRoles [i]) {
hypertext = true;
break;
}
}
for (int i = 0; i < selectionRoles.length; i++) {
if (event.detail == selectionRoles [i]) {
selection = true;
break;
}
}
for (int i = 0; i < textRoles.length; i++) {
if (event.detail == textRoles [i]) {
text = true;
break;
}
}
} else {
action = hypertext = selection = text = true;
}
String swtTypeName = new String (SWT_TYPE_PREFIX);
swtTypeName += new String (widgetTypeName);
if (action) swtTypeName += "Action";
if (hypertext) swtTypeName += "Hypertext";
if (selection) swtTypeName += "Selection";
if (text) swtTypeName += "Text";
int /*long*/ type = 0;
LONG typeInt = (LONG)Types.get (swtTypeName);
if (typeInt != null) {
type = typeInt.value;
} else {
/* define the type */
int /*long*/ queryPtr = OS.g_malloc (GTypeQuery.sizeof);
ATK.g_type_query (parentType, queryPtr);
GTypeQuery query = new GTypeQuery ();
ATK.memmove (query, queryPtr, GTypeQuery.sizeof);
OS.g_free (queryPtr);
GTypeInfo typeInfo = new GTypeInfo ();
typeInfo.base_init = GTypeInfo_base_init_type.getAddress ();
typeInfo.class_size = (short) query.class_size;
typeInfo.instance_size = (short) query.instance_size;
ObjectIfaceDefinition = OS.g_malloc (GTypeInfo.sizeof);
ATK.memmove (ObjectIfaceDefinition, typeInfo, GTypeInfo.sizeof);
byte[] nameBytes = new byte [swtTypeName.length () + 1];
System.arraycopy(swtTypeName.getBytes (), 0, nameBytes, 0, swtTypeName.length ());
type = ATK.g_type_register_static (parentType, nameBytes, ObjectIfaceDefinition, 0);
ATK.g_type_add_interface_static (type, AccessibleObject.ATK_COMPONENT_TYPE, ComponentIfaceDefinition);
if (action) ATK.g_type_add_interface_static (type, AccessibleObject.ATK_ACTION_TYPE, ActionIfaceDefinition);
if (hypertext) ATK.g_type_add_interface_static (type, AccessibleObject.ATK_HYPERTEXT_TYPE, HypertextIfaceDefinition);
if (selection) ATK.g_type_add_interface_static (type, AccessibleObject.ATK_SELECTION_TYPE, SelectionIfaceDefinition);
if (text) ATK.g_type_add_interface_static (type, AccessibleObject.ATK_TEXT_TYPE, TextIfaceDefinition);
Types.put (swtTypeName, new LONG (type));
}
return type;
}
int /*long*/ gTypeInfo_base_init_factory (int /*long*/ klass) {
int /*long*/ atkObjectFactoryClass = ATK.ATK_OBJECT_FACTORY_CLASS (klass);
AtkObjectFactoryClass objectFactoryClassStruct = new AtkObjectFactoryClass ();
ATK.memmove (objectFactoryClassStruct, atkObjectFactoryClass);
atkObjectFactoryCB_create_accessible = new Callback (this, "atkObjectFactory_create_accessible", 1);
objectFactoryClassStruct.create_accessible = atkObjectFactoryCB_create_accessible.getAddress ();
ATK.memmove (atkObjectFactoryClass, objectFactoryClassStruct);
return 0;
}
static int /*long*/ gTypeInfo_base_init_type (int /*long*/ klass) {
AtkObjectClass objectClass = new AtkObjectClass ();
ATK.memmove (objectClass, klass);
objectClass.get_name = AtkObjectCB_get_name.getAddress ();
objectClass.get_description = AtkObjectCB_get_description.getAddress ();
objectClass.get_n_children = AtkObjectCB_get_n_children.getAddress ();
objectClass.get_role = AtkObjectCB_get_role.getAddress ();
objectClass.get_parent = AtkObjectCB_get_parent.getAddress ();
objectClass.ref_state_set = AtkObjectCB_ref_state_set.getAddress ();
objectClass.get_index_in_parent = AtkObjectCB_get_index_in_parent.getAddress ();
objectClass.ref_child = AtkObjectCB_ref_child.getAddress ();
int /*long*/ gObjectClass = ATK.G_OBJECT_CLASS (klass);
GObjectClass objectClassStruct = new GObjectClass ();
ATK.memmove (objectClassStruct, gObjectClass);
objectClassStruct.finalize = GObjectClass_finalize.getAddress ();
ATK.memmove (gObjectClass, objectClassStruct);
ATK.memmove (klass, objectClass);
return 0;
}
static int /*long*/ initActionIfaceCB (int /*long*/ iface) {
AtkActionIface actionIface = new AtkActionIface ();
ATK.memmove (actionIface, iface);
actionIface.get_keybinding = AtkActionCB_get_keybinding.getAddress ();
actionIface.get_name = AtkActionCB_get_name.getAddress ();
ATK.memmove (iface, actionIface);
return 0;
}
static int /*long*/ initComponentIfaceCB (int /*long*/ iface) {
AtkComponentIface componentIface = new AtkComponentIface ();
ATK.memmove (componentIface, iface);
componentIface.get_extents = AtkComponentCB_get_extents.getAddress ();
componentIface.get_position = AtkComponentCB_get_position.getAddress ();
componentIface.get_size = AtkComponentCB_get_size.getAddress ();
componentIface.ref_accessible_at_point = AtkComponentCB_ref_accessible_at_point.getAddress ();
ATK.memmove (iface, componentIface);
return 0;
}
static int /*long*/ initHypertextIfaceCB (int /*long*/ iface) {
AtkHypertextIface hypertextIface = new AtkHypertextIface ();
ATK.memmove (hypertextIface, iface);
hypertextIface.get_link = AtkHypertextCB_get_link.getAddress ();
hypertextIface.get_link_index = AtkHypertextCB_get_link_index.getAddress ();
hypertextIface.get_n_links = AtkHypertextCB_get_n_links.getAddress ();
ATK.memmove (iface, hypertextIface);
return 0;
}
static int /*long*/ initSelectionIfaceCB (int /*long*/ iface) {
AtkSelectionIface selectionIface = new AtkSelectionIface ();
ATK.memmove (selectionIface, iface);
selectionIface.is_child_selected = AtkSelectionCB_is_child_selected.getAddress ();
selectionIface.ref_selection = AtkSelectionCB_ref_selection.getAddress ();
ATK.memmove (iface, selectionIface);
return 0;
}
static int /*long*/ initTextIfaceCB (int /*long*/ iface) {
AtkTextIface textInterface = new AtkTextIface ();
ATK.memmove (textInterface, iface);
textInterface.get_caret_offset = AtkTextCB_get_caret_offset.getAddress ();
textInterface.get_character_at_offset = AtkTextCB_get_character_at_offset.getAddress ();
textInterface.get_character_count = AtkTextCB_get_character_count.getAddress ();
textInterface.get_n_selections = AtkTextCB_get_n_selections.getAddress ();
textInterface.get_selection = AtkTextCB_get_selection.getAddress ();
textInterface.get_text = AtkTextCB_get_text.getAddress ();
textInterface.get_text_after_offset = AtkTextCB_get_text_after_offset.getAddress ();
textInterface.get_text_at_offset = AtkTextCB_get_text_at_offset.getAddress ();
textInterface.get_text_before_offset = AtkTextCB_get_text_before_offset.getAddress ();
ATK.memmove (iface, textInterface);
return 0;
}
static void registerAccessible (Accessible accessible) {
int /*long*/ controlHandle = accessible.getControlHandle ();
int /*long*/ widgetType = ATK.G_TYPE_FROM_INSTANCE (controlHandle);
AccessibleFactory factory = (AccessibleFactory) Factories.get (new LONG (widgetType));
if (factory == null) {
factory = new AccessibleFactory (widgetType);
Factories.put (new LONG (widgetType), factory);
}
factory.addAccessible (accessible);
}
void removeAccessible (Accessible accessible) {
accessibles.remove (new LONG (accessible.getControlHandle ()));
}
static void unregisterAccessible (Accessible accessible) {
int /*long*/ controlHandle = accessible.getControlHandle ();
int /*long*/ widgetType = ATK.G_TYPE_FROM_INSTANCE (controlHandle);
AccessibleFactory factory = (AccessibleFactory) Factories.get (new LONG (widgetType));
if (factory != null) {
factory.removeAccessible (accessible);
}
}
}
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