nsresult
nsJSON::EncodeInternal(JSContext* cx, const JS::Value& aValue,
nsJSONWriter* writer)
{
JSAutoRequest ar(cx);
// Backward compatibility:
// nsIJSON does not allow to serialize anything other than objects
if (!aValue.isObject()) {
return NS_ERROR_INVALID_ARG;
}
JSObject* obj = &aValue.toObject();
JS::Value val = aValue;
/* Backward compatibility:
* Manually call toJSON if implemented by the object and check that
* the result is still an object
* Note: It is perfectly fine to not implement toJSON, so it is
* perfectly fine for GetMethod to fail
*/
JS::Value toJSON;
if (JS_GetMethod(cx, obj, "toJSON", NULL, &toJSON) &&
!JSVAL_IS_PRIMITIVE(toJSON) &&
JS_ObjectIsCallable(cx, JSVAL_TO_OBJECT(toJSON))) {
// If toJSON is implemented, it must not throw
if (!JS_CallFunctionValue(cx, obj, toJSON, 0, NULL, &val)) {
if (JS_IsExceptionPending(cx))
// passing NS_OK will throw the pending exception
return NS_OK;
// No exception, but still failed
return NS_ERROR_FAILURE;
}
// Backward compatibility:
// nsIJSON does not allow to serialize anything other than objects
if (JSVAL_IS_PRIMITIVE(val))
return NS_ERROR_INVALID_ARG;
}
// GetMethod may have thrown
else if (JS_IsExceptionPending(cx))
// passing NS_OK will throw the pending exception
return NS_OK;
// Backward compatibility:
// function shall not pass, just "plain" objects and arrays
JSType type = JS_TypeOfValue(cx, val);
if (type == JSTYPE_FUNCTION)
return NS_ERROR_INVALID_ARG;
// We're good now; try to stringify
if (!JS_Stringify(cx, &val, NULL, JSVAL_NULL, WriteCallback, writer))
return NS_ERROR_FAILURE;
return NS_OK;
}
nsresult
nsJSON::EncodeInternal(JSContext* cx, const JS::Value& aValue,
nsJSONWriter* writer)
{
// Backward compatibility:
// nsIJSON does not allow to serialize anything other than objects
if (!aValue.isObject()) {
return NS_ERROR_INVALID_ARG;
}
JS::Rooted<JSObject*> obj(cx, &aValue.toObject());
/* Backward compatibility:
* Manually call toJSON if implemented by the object and check that
* the result is still an object
* Note: It is perfectly fine to not implement toJSON, so it is
* perfectly fine for GetMethod to fail
*/
JS::Rooted<JS::Value> val(cx, aValue);
JS::Rooted<JS::Value> toJSON(cx);
if (JS_GetProperty(cx, obj, "toJSON", &toJSON) &&
toJSON.isObject() &&
JS_ObjectIsCallable(cx, &toJSON.toObject())) {
// If toJSON is implemented, it must not throw
if (!JS_CallFunctionValue(cx, obj, toJSON, 0, nullptr, val.address())) {
if (JS_IsExceptionPending(cx))
// passing NS_OK will throw the pending exception
return NS_OK;
// No exception, but still failed
return NS_ERROR_FAILURE;
}
// Backward compatibility:
// nsIJSON does not allow to serialize anything other than objects
if (val.isPrimitive())
return NS_ERROR_INVALID_ARG;
}
// GetMethod may have thrown
else if (JS_IsExceptionPending(cx))
// passing NS_OK will throw the pending exception
return NS_OK;
// Backward compatibility:
// function shall not pass, just "plain" objects and arrays
JSType type = JS_TypeOfValue(cx, val);
if (type == JSTYPE_FUNCTION)
return NS_ERROR_INVALID_ARG;
// We're good now; try to stringify
if (!JS_Stringify(cx, &val, JS::NullPtr(), JS::NullHandleValue, WriteCallback, writer))
return NS_ERROR_FAILURE;
return NS_OK;
}
bool
CallbackInterface::GetCallableProperty(JSContext* cx, const char* aPropName,
JS::MutableHandle<JS::Value> aCallable)
{
if (!JS_GetProperty(cx, mCallback, aPropName, aCallable.address())) {
return false;
}
if (!aCallable.isObject() ||
!JS_ObjectIsCallable(cx, &aCallable.toObject())) {
nsPrintfCString description("Property '%s'", aPropName);
ThrowErrorMessage(cx, MSG_NOT_CALLABLE, description.get());
return false;
}
return true;
}
bool
CallbackInterface::GetCallableProperty(JSContext* cx, JS::Handle<jsid> aPropId,
JS::MutableHandle<JS::Value> aCallable)
{
if (!JS_GetPropertyById(cx, CallbackPreserveColor(), aPropId, aCallable)) {
return false;
}
if (!aCallable.isObject() ||
!JS_ObjectIsCallable(cx, &aCallable.toObject())) {
char* propName =
JS_EncodeString(cx, JS_FORGET_STRING_FLATNESS(JSID_TO_FLAT_STRING(aPropId)));
nsPrintfCString description("Property '%s'", propName);
JS_free(cx, propName);
ThrowErrorMessage(cx, MSG_NOT_CALLABLE, description.get());
return false;
}
return true;
}
JSBool
jsd_IsValueFunction(JSDContext* jsdc, JSDValue* jsdval)
{
return !JSVAL_IS_PRIMITIVE(jsdval->val) &&
JS_ObjectIsCallable(jsdc->dumbContext, JSVAL_TO_OBJECT(jsdval->val));
}
