Function input_event_handle

pywebio/io_ctrl.py:327–386

根据提供的校验函数处理表单事件 :param item_valid_funcs: map(name -> valid_func) valid_func 为 None 时，不进行验证 valid_func: callback(data) -> error_msg or None :param form_valid_funcs: callback(data) -> (name, error_msg) or None :param preprocess_funcs: map(name -> process_func)

(item_valid_funcs, form_valid_funcs, preprocess_funcs, onchange_funcs)

@chose_impl
def input_event_handle(item_valid_funcs, form_valid_funcs, preprocess_funcs, onchange_funcs):
    """
    根据提供的校验函数处理表单事件
    :param item_valid_funcs: map(name -> valid_func)  valid_func 为 None 时，不进行验证
                        valid_func: callback(data) -> error_msg or None
    :param form_valid_funcs: callback(data) -> (name, error_msg) or None
    :param preprocess_funcs: map(name -> process_func)
    :param onchange_funcs: map(name -> onchange_func)
    :return:
    """
    form_data = None
    while True:
        event = yield next_client_event()
        event_name, event_data = event['event'], event['data']
        if event_name == 'input_event':
            input_event = event_data['event_name']
            if input_event == 'blur':
                onblur_name = event_data['name']
                check_item(onblur_name, event_data['value'], item_valid_funcs[onblur_name],
                           preprocess_funcs[onblur_name], clear_invalid=True)
            elif input_event == 'change':
                trigger_onchange(event_data, onchange_funcs)

        elif event_name == 'from_submit':
            all_valid = True

            # 调用输入项验证函数进行校验
            for name, valid_func in item_valid_funcs.items():
                if not check_item(name, event_data[name], valid_func, preprocess_funcs[name]):
                    all_valid = False

            if all_valid:  # todo: cache result of preprocess_funcs[name]
                form_data = {name: preprocess_funcs[name](val) for name, val in event_data.items()}
                # 调用表单验证函数进行校验
                if form_valid_funcs:
                    v_res = form_valid_funcs(form_data)
                    if v_res is not None:
                        all_valid = False
                        try:
                            onblur_name, error_msg = v_res
                        except Exception:
                            # Use `raise Exception from None` to disable exception chaining
                            # see: https://docs.python.org/3/tutorial/errors.html#exception-chaining
                            raise ValueError("The `validate` function for input group must "
                                             "return `(name, error_msg)` when validation failed.") from None

                        send_msg('update_input', dict(target_name=onblur_name, attributes={
                            'valid_status': False,
                            'invalid_feedback': error_msg
                        }))

            if all_valid:
                break  # form event loop
        elif event_name == 'from_cancel':
            form_data = None
            break  # break event loop
        else:
            logger.warning("Unhandled Event: %s", event)