static COMPtr<IAccessible> findAccessibleObjectById(AccessibilityUIElement parentObject, BSTR idAttribute)
{
COMPtr<IAccessible> parentIAccessible = parentObject.platformUIElement();
COMPtr<IServiceProvider> serviceProvider(Query, parentIAccessible);
if (!serviceProvider)
return 0;
COMPtr<IAccessibleComparable> comparable = comparableObject(serviceProvider);
if (!comparable)
return 0;
_variant_t value;
_bstr_t elementIdAttributeKey(L"AXDRTElementIdAttribute");
if (SUCCEEDED(comparable->get_attribute(elementIdAttributeKey, &value.GetVARIANT()))) {
ASSERT(V_VT(&value) == VT_BSTR);
if (VARCMP_EQ == ::VarBstrCmp(value.bstrVal, idAttribute, LOCALE_USER_DEFAULT, 0))
return parentIAccessible;
}
long childCount = parentObject.childrenCount();
if (!childCount)
return nullptr;
COMPtr<IAccessible> result;
for (long i = 0; i < childCount; ++i) {
AccessibilityUIElement childAtIndex = parentObject.getChildAtIndex(i);
result = findAccessibleObjectById(childAtIndex, idAttribute);
if (result)
return result;
}
return nullptr;
}
void AccessibilityUIElement::parentElementCallback(const CppArgumentList&, CppVariant* result)
{
AccessibilityUIElement* parent = m_factory->getOrCreate(accessibilityObject().parentObject());
if (!parent) {
result->setNull();
return;
}
result->set(*(parent->getAsCppVariant()));
}
static JSValueRef getIsValidCallback(JSContextRef context, JSObjectRef thisObject, JSStringRef propertyName, JSValueRef* exception)
{
AccessibilityUIElement* uiElement = toAXElement(thisObject);
if (!uiElement->platformUIElement())
return JSValueMakeBoolean(context, false);
// There might be other platform logic that one could check here...
return JSValueMakeBoolean(context, true);
}
void AccessibilityController::accessibleElementByIdGetterCallback(const CppArgumentList& arguments, CppVariant* result)
{
result->setNull();
if (arguments.size() < 1 || !arguments[0].isString())
return;
std::string id = arguments[0].toString();
AccessibilityUIElement* foundElement = getAccessibleElementById(id);
if (!foundElement)
return;
result->set(*(foundElement->getAsCppVariant()));
}
static String attributesOfElement(AccessibilityUIElement* element)
{
StringBuilder builder;
builder.append(String::format("%s\n", element->role()->string().utf8().data()));
// For the parent we print its role and its name, if available.
builder.append("AXParent: ");
AccessibilityUIElement parent = element->parentElement();
if (AtkObject* atkParent = parent.platformUIElement()) {
builder.append(roleToString(atk_object_get_role(atkParent)));
const char* parentName = atk_object_get_name(atkParent);
if (parentName && g_utf8_strlen(parentName, -1))
builder.append(String::format(": %s", parentName));
} else
builder.append("(null)");
builder.append("\n");
builder.append(String::format("AXChildren: %d\n", element->childrenCount()));
builder.append(String::format("AXPosition: { %f, %f }\n", element->x(), element->y()));
builder.append(String::format("AXSize: { %f, %f }\n", element->width(), element->height()));
String title = element->title()->string();
if (!title.isEmpty())
builder.append(String::format("%s\n", title.utf8().data()));
String description = element->description()->string();
if (!description.isEmpty())
builder.append(String::format("%s\n", description.utf8().data()));
String value = element->stringValue()->string();
if (!value.isEmpty())
builder.append(String::format("%s\n", value.utf8().data()));
builder.append(String::format("AXFocusable: %d\n", element->isFocusable()));
builder.append(String::format("AXFocused: %d\n", element->isFocused()));
builder.append(String::format("AXSelectable: %d\n", element->isSelectable()));
builder.append(String::format("AXSelected: %d\n", element->isSelected()));
builder.append(String::format("AXMultiSelectable: %d\n", element->isMultiSelectable()));
builder.append(String::format("AXEnabled: %d\n", element->isEnabled()));
builder.append(String::format("AXExpanded: %d\n", element->isExpanded()));
builder.append(String::format("AXRequired: %d\n", element->isRequired()));
builder.append(String::format("AXChecked: %d\n", element->isChecked()));
// We append the ATK specific attributes as a single line at the end.
builder.append("AXPlatformAttributes: ");
builder.append(getAtkAttributeSetAsString(element->platformUIElement()));
return builder.toString();
}
void AccessibilityUIElement::childAtIndexCallback(const CppArgumentList& arguments, CppVariant* result)
{
if (!arguments.size() || !arguments[0].isNumber()) {
result->setNull();
return;
}
AccessibilityUIElement* child = getChildAtIndex(arguments[0].toInt32());
if (!child) {
result->setNull();
return;
}
result->set(*(child->getAsCppVariant()));
}
void AccessibilityController::notificationReceived(const WebKit::WebAccessibilityObject& target, const char* notificationName)
{
// Call notification listeners on the element.
AccessibilityUIElement* element = m_elements.getOrCreate(target);
element->notificationReceived(notificationName);
// Call global notification listeners.
size_t callbackCount = m_notificationCallbacks.size();
for (size_t i = 0; i < callbackCount; i++) {
CppVariant arguments[2];
arguments[0].set(*element->getAsCppVariant());
arguments[1].set(notificationName);
CppVariant invokeResult;
m_notificationCallbacks[i].invokeDefault(arguments, 2, invokeResult);
}
}