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gecko-dev/accessible/atk/AccessibleWrap.cpp

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/* -*- 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 "Accessible-inl.h"
#include "ApplicationAccessibleWrap.h"
#include "InterfaceInitFuncs.h"
#include "nsAccUtils.h"
#include "mozilla/a11y/PDocAccessible.h"
#include "ProxyAccessible.h"
#include "RootAccessible.h"
#include "nsMai.h"
#include "nsMaiHyperlink.h"
#include "nsString.h"
#include "nsAutoPtr.h"
#include "prprf.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 "nsXPCOMStrings.h"
#include "nsComponentManagerUtils.h"
#include "nsIPersistentProperties2.h"
using namespace mozilla;
using namespace mozilla::a11y;
AccessibleWrap::EAvailableAtkSignals AccessibleWrap::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 */
};
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;
}
return G_TYPE_INVALID;
}
static const char* kNonUserInputEvent = ":system";
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}
};
/**
* 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.
*/
uintptr_t accWrap;
};
// This is or'd with the pointer in MaiAtkObject::accWrap if the wrap-ee is a
// proxy.
static const uintptr_t IS_PROXY = 1;
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;
static GQuark quark_mai_hyperlink = 0;
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) :
Accessible(aContent, aDoc), mAtkObject(nullptr)
{
}
AccessibleWrap::~AccessibleWrap()
{
NS_ASSERTION(!mAtkObject, "ShutdownAtkObject() is not called");
}
void
AccessibleWrap::ShutdownAtkObject()
{
if (mAtkObject) {
if (IS_MAI_OBJECT(mAtkObject)) {
MAI_ATK_OBJECT(mAtkObject)->accWrap = 0;
}
SetMaiHyperlink(nullptr);
g_object_unref(mAtkObject);
mAtkObject = nullptr;
}
}
void
AccessibleWrap::Shutdown()
{
ShutdownAtkObject();
Accessible::Shutdown();
}
MaiHyperlink*
AccessibleWrap::GetMaiHyperlink(bool aCreate /* = true */)
{
// make sure mAtkObject is created
GetAtkObject();
NS_ASSERTION(quark_mai_hyperlink, "quark_mai_hyperlink not initialized");
NS_ASSERTION(IS_MAI_OBJECT(mAtkObject), "Invalid AtkObject");
MaiHyperlink* maiHyperlink = nullptr;
if (quark_mai_hyperlink && IS_MAI_OBJECT(mAtkObject)) {
maiHyperlink = (MaiHyperlink*)g_object_get_qdata(G_OBJECT(mAtkObject),
quark_mai_hyperlink);
if (!maiHyperlink && aCreate) {
maiHyperlink = new MaiHyperlink(this);
SetMaiHyperlink(maiHyperlink);
}
}
return maiHyperlink;
}
void
AccessibleWrap::SetMaiHyperlink(MaiHyperlink* aMaiHyperlink)
{
NS_ASSERTION(quark_mai_hyperlink, "quark_mai_hyperlink not initialized");
NS_ASSERTION(IS_MAI_OBJECT(mAtkObject), "Invalid AtkObject");
if (quark_mai_hyperlink && IS_MAI_OBJECT(mAtkObject)) {
MaiHyperlink* maiHyperlink = GetMaiHyperlink(false);
if (!maiHyperlink && !aMaiHyperlink) {
return; // Never set and we're shutting down
}
delete maiHyperlink;
g_object_set_qdata(G_OBJECT(mAtkObject), quark_mai_hyperlink,
aMaiHyperlink);
}
}
void
AccessibleWrap::GetNativeInterface(void** aOutAccessible)
{
*aOutAccessible = nullptr;
if (!mAtkObject) {
if (IsDefunct() || !nsAccUtils::IsEmbeddedObject(this)) {
// 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, 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 Accessible interface
/* static */
AtkObject *
AccessibleWrap::GetAtkObject(Accessible* 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;
// 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]);
}
}
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];
PR_snprintf(name, MAI_ATK_TYPE_NAME_LEN, "%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)->accWrap = reinterpret_cast<uintptr_t>(aData);
}
void
finalizeCB(GObject *aObj)
{
if (!IS_MAI_OBJECT(aObj))
return;
NS_ASSERTION(MAI_ATK_OBJECT(aObj)->accWrap == 0, "AccWrap 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;
AccessibleWrap* accWrap = GetAccessibleWrap(aAtkObj);
if (accWrap)
accWrap->Name(name);
else if (ProxyAccessible* proxy = GetProxy(aAtkObj))
proxy->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 && newNameUTF8.Equals(aAtkObj->name))
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;
AccessibleWrap* accWrap = GetAccessibleWrap(aAtkObj);
if (accWrap) {
if (accWrap->IsDefunct())
return nullptr;
accWrap->Description(uniDesc);
} else if (ProxyAccessible* proxy = GetProxy(aAtkObj)) {
proxy->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;
AccessibleWrap* accWrap = GetAccessibleWrap(aAtkObj);
a11y::role role;
if (!accWrap) {
ProxyAccessible* proxy = GetProxy(aAtkObj);
if (!proxy)
return ATK_ROLE_INVALID;
role = proxy->Role();
} else {
#ifdef DEBUG
NS_ASSERTION(nsAccUtils::IsTextInterfaceSupportCorrect(accWrap),
"Does not support Text interface when it should");
#endif
role = accWrap->Role();
}
#define ROLE(geckoRole, stringRole, atkRole, macRole, \
msaaRole, ia2Role, nameRule) \
case roles::geckoRole: \
aAtkObj->role = atkRole; \
break;
switch (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;
return aAtkObj->role;
}
static AtkAttributeSet*
ConvertToAtkAttributeSet(nsIPersistentProperties* aAttributes)
{
if (!aAttributes)
return nullptr;
AtkAttributeSet *objAttributeSet = nullptr;
nsCOMPtr<nsISimpleEnumerator> propEnum;
nsresult rv = aAttributes->Enumerate(getter_AddRefs(propEnum));
NS_ENSURE_SUCCESS(rv, nullptr);
bool hasMore;
while (NS_SUCCEEDED(propEnum->HasMoreElements(&hasMore)) && hasMore) {
nsCOMPtr<nsISupports> sup;
rv = propEnum->GetNext(getter_AddRefs(sup));
NS_ENSURE_SUCCESS(rv, objAttributeSet);
nsCOMPtr<nsIPropertyElement> propElem(do_QueryInterface(sup));
NS_ENSURE_TRUE(propElem, objAttributeSet);
nsAutoCString name;
rv = propElem->GetKey(name);
NS_ENSURE_SUCCESS(rv, objAttributeSet);
nsAutoString value;
rv = propElem->GetValue(value);
NS_ENSURE_SUCCESS(rv, objAttributeSet);
AtkAttribute *objAttr = (AtkAttribute *)g_malloc(sizeof(AtkAttribute));
objAttr->name = g_strdup(name.get());
objAttr->value = g_strdup(NS_ConvertUTF16toUTF8(value).get());
objAttributeSet = g_slist_prepend(objAttributeSet, objAttr);
}
//libspi will free it
return objAttributeSet;
}
AtkAttributeSet*
GetAttributeSet(Accessible* aAccessible)
{
nsCOMPtr<nsIPersistentProperties> attributes = aAccessible->Attributes();
if (attributes) {
// There is no ATK state for haspopup, must use object attribute to expose
// the same info.
if (aAccessible->State() & states::HASPOPUP) {
nsAutoString unused;
attributes->SetStringProperty(NS_LITERAL_CSTRING("haspopup"),
NS_LITERAL_STRING("true"), unused);
}
return ConvertToAtkAttributeSet(attributes);
}
return nullptr;
}
AtkAttributeSet *
getAttributesCB(AtkObject *aAtkObj)
{
AccessibleWrap* accWrap = GetAccessibleWrap(aAtkObj);
if (accWrap)
return GetAttributeSet(accWrap);
ProxyAccessible* proxy = GetProxy(aAtkObj);
if (!proxy)
return nullptr;
nsAutoTArray<Attribute, 10> attrs;
proxy->Attributes(&attrs);
if (attrs.IsEmpty())
return nullptr;
AtkAttributeSet* objAttributeSet = nullptr;
for (uint32_t i = 0; i < attrs.Length(); i++) {
AtkAttribute *objAttr = (AtkAttribute *)g_malloc(sizeof(AtkAttribute));
objAttr->name = g_strdup(attrs[i].Name().get());
objAttr->value = g_strdup(NS_ConvertUTF16toUTF8(attrs[i].Value()).get());
objAttributeSet = g_slist_prepend(objAttributeSet, objAttr);
}
return objAttributeSet;
}
const gchar*
GetLocaleCB(AtkObject* aAtkObj)
{
AccessibleWrap* accWrap = GetAccessibleWrap(aAtkObj);
if (!accWrap)
return nullptr;
nsAutoString locale;
accWrap->Language(locale);
return AccessibleWrap::ReturnString(locale);
}
AtkObject *
getParentCB(AtkObject *aAtkObj)
{
if (aAtkObj->accessible_parent)
return aAtkObj->accessible_parent;
AtkObject* atkParent = nullptr;
if (AccessibleWrap* wrapper = GetAccessibleWrap(aAtkObj)) {
Accessible* parent = wrapper->Parent();
atkParent = parent ? AccessibleWrap::GetAtkObject(parent) : nullptr;
} else if (ProxyAccessible* proxy = GetProxy(aAtkObj)) {
ProxyAccessible* parent = proxy->Parent();
atkParent = parent ? GetWrapperFor(parent) : nullptr;
}
if (atkParent)
atk_object_set_parent(aAtkObj, atkParent);
return aAtkObj->accessible_parent;
}
gint
getChildCountCB(AtkObject *aAtkObj)
{
AccessibleWrap* accWrap = GetAccessibleWrap(aAtkObj);
if (!accWrap || nsAccUtils::MustPrune(accWrap)) {
return 0;
}
return static_cast<gint>(accWrap->EmbeddedChildCount());
}
AtkObject *
refChildCB(AtkObject *aAtkObj, gint aChildIndex)
{
// aChildIndex should not be less than zero
if (aChildIndex < 0) {
return nullptr;
}
AccessibleWrap* accWrap = GetAccessibleWrap(aAtkObj);
if (!accWrap || nsAccUtils::MustPrune(accWrap)) {
return nullptr;
}
Accessible* accChild = accWrap->GetEmbeddedChildAt(aChildIndex);
if (!accChild)
return nullptr;
AtkObject* childAtkObj = AccessibleWrap::GetAtkObject(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 Accessible::IndexInParent() because we don't include text
// leaf nodes as children in ATK.
AccessibleWrap* accWrap = GetAccessibleWrap(aAtkObj);
if (!accWrap) {
return -1;
}
Accessible* parent = accWrap->Parent();
if (!parent)
return -1; // No parent
return parent->GetIndexOfEmbeddedChild(accWrap);
}
static void
TranslateStates(uint64_t aState, AtkStateSet* aStateSet)
{
// atk doesn't have a read only state so read only things shouldn't be
// editable.
if (aState & states::READONLY)
aState &= ~states::EDITABLE;
// Convert every state to an entry in AtkStateMap
uint32_t stateIndex = 0;
uint64_t bitMask = 1;
while (gAtkStateMap[stateIndex].stateMapEntryType != kNoSuchState) {
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;
++ stateIndex;
}
}
AtkStateSet *
refStateSetCB(AtkObject *aAtkObj)
{
AtkStateSet *state_set = nullptr;
state_set = ATK_OBJECT_CLASS(parent_class)->ref_state_set(aAtkObj);
AccessibleWrap* accWrap = GetAccessibleWrap(aAtkObj);
if (accWrap)
TranslateStates(accWrap->State(), state_set);
else if (ProxyAccessible* proxy = GetProxy(aAtkObj))
TranslateStates(proxy->State(), state_set);
else
TranslateStates(states::DEFUNCT, 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(AccessibleWrap::GetAtkObject(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);
AccessibleWrap* accWrap = GetAccessibleWrap(aAtkObj);
if (!accWrap)
return relation_set;
#define RELATIONTYPE(geckoType, geckoTypeName, atkType, msaaType, ia2Type) \
UpdateAtkRelation(RelationType::geckoType, accWrap, 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);
// Make sure its native is an AccessibleWrap not a proxy.
if (MAI_ATK_OBJECT(aAtkObj)->accWrap & IS_PROXY)
return nullptr;
AccessibleWrap* accWrap =
reinterpret_cast<AccessibleWrap*>(MAI_ATK_OBJECT(aAtkObj)->accWrap);
// 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;
}
ProxyAccessible*
GetProxy(AtkObject* aObj)
{
if (!aObj || !(MAI_ATK_OBJECT(aObj)->accWrap & IS_PROXY))
return nullptr;
return reinterpret_cast<ProxyAccessible*>(MAI_ATK_OBJECT(aObj)->accWrap
& ~IS_PROXY);
}
AtkObject*
GetWrapperFor(ProxyAccessible* aProxy)
{
return reinterpret_cast<AtkObject*>(aProxy->GetWrapper() & ~IS_PROXY);
}
static uint16_t
GetInterfacesForProxy(ProxyAccessible* aProxy)
{
return MAI_INTERFACE_COMPONENT;
}
void
a11y::ProxyCreated(ProxyAccessible* aProxy)
{
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;
uintptr_t inner = reinterpret_cast<uintptr_t>(aProxy) | IS_PROXY;
atk_object_initialize(obj, reinterpret_cast<gpointer>(inner));
obj->role = ATK_ROLE_INVALID;
obj->layer = ATK_LAYER_INVALID;
aProxy->SetWrapper(reinterpret_cast<uintptr_t>(obj) | IS_PROXY);
}
void
a11y::ProxyDestroyed(ProxyAccessible* aProxy)
{
auto obj = reinterpret_cast<MaiAtkObject*>(aProxy->GetWrapper() & ~IS_PROXY);
obj->accWrap = 0;
g_object_unref(obj);
aProxy->SetWrapper(0);
}
nsresult
AccessibleWrap::HandleAccEvent(AccEvent* aEvent)
{
nsresult rv = Accessible::HandleAccEvent(aEvent);
NS_ENSURE_SUCCESS(rv, rv);
Accessible* 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:
return FireAtkStateChangeEvent(aEvent, atkObj);
case nsIAccessibleEvent::EVENT_TEXT_REMOVED:
case nsIAccessibleEvent::EVENT_TEXT_INSERTED:
return FireAtkTextChangedEvent(aEvent, atkObj);
case nsIAccessibleEvent::EVENT_FOCUS:
{
a11y::RootAccessible* rootAccWrap = accWrap->RootAccessible();
if (rootAccWrap && rootAccWrap->mActivated) {
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:
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_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:
return FireAtkShowHideEvent(aEvent, atkObj, true);
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);
}
return FireAtkShowHideEvent(aEvent, atkObj, false);
/*
* 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:
{
accessible->AsRoot()->mActivated = true;
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:
{
accessible->AsRoot()->mActivated = false;
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:
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:
g_signal_emit_by_name (atkObj, "reload");
break;
case nsIAccessibleEvent::EVENT_DOCUMENT_LOAD_STOPPED:
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;
}
nsresult
AccessibleWrap::FireAtkStateChangeEvent(AccEvent* aEvent,
AtkObject* aObject)
{
AccStateChangeEvent* event = downcast_accEvent(aEvent);
NS_ENSURE_TRUE(event, NS_ERROR_FAILURE);
bool isEnabled = event->IsStateEnabled();
int32_t stateIndex = AtkStateMap::GetStateIndexFor(event->GetState());
if (stateIndex >= 0) {
NS_ASSERTION(gAtkStateMap[stateIndex].stateMapEntryType != kNoSuchState,
"No such state");
if (gAtkStateMap[stateIndex].atkState != kNone) {
NS_ASSERTION(gAtkStateMap[stateIndex].stateMapEntryType != kNoStateChange,
"State changes should not fired for this state");
if (gAtkStateMap[stateIndex].stateMapEntryType == kMapOpposite)
isEnabled = !isEnabled;
// Fire state change for first state if there is one to map
atk_object_notify_state_change(aObject,
gAtkStateMap[stateIndex].atkState,
isEnabled);
}
}
return NS_OK;
}
nsresult
AccessibleWrap::FireAtkTextChangedEvent(AccEvent* aEvent,
AtkObject* aObject)
{
AccTextChangeEvent* event = downcast_accEvent(aEvent);
NS_ENSURE_TRUE(event, NS_ERROR_FAILURE);
int32_t start = event->GetStartOffset();
uint32_t length = event->GetLength();
bool isInserted = event->IsTextInserted();
bool isFromUserInput = aEvent->IsFromUserInput();
char* signal_name = nullptr;
if (gAvailableAtkSignals == eUnknown)
gAvailableAtkSignals =
g_signal_lookup("text-insert", G_OBJECT_TYPE(aObject)) ?
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
signal_name = g_strconcat(isInserted ? "text_changed::insert" :
"text_changed::delete",
isFromUserInput ? "" : kNonUserInputEvent, nullptr);
g_signal_emit_by_name(aObject, signal_name, start, length);
} else {
nsAutoString text;
event->GetModifiedText(text);
signal_name = g_strconcat(isInserted ? "text-insert" : "text-remove",
isFromUserInput ? "" : "::system", nullptr);
g_signal_emit_by_name(aObject, signal_name, start, length,
NS_ConvertUTF16toUTF8(text).get());
}
g_free(signal_name);
return NS_OK;
}
nsresult
AccessibleWrap::FireAtkShowHideEvent(AccEvent* aEvent,
AtkObject* aObject, bool aIsAdded)
{
int32_t indexInParent = getIndexInParentCB(aObject);
AtkObject *parentObject = getParentCB(aObject);
NS_ENSURE_STATE(parentObject);
bool isFromUserInput = aEvent->IsFromUserInput();
char *signal_name = g_strconcat(aIsAdded ? "children_changed::add" : "children_changed::remove",
isFromUserInput ? "" : kNonUserInputEvent, nullptr);
g_signal_emit_by_name(parentObject, signal_name, indexInParent, aObject, nullptr);
g_free(signal_name);
return NS_OK;
}
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