Source code for devctrl.utility

def increase_value(values, getter, setter, name):
    """
    From a list of values, get the current value, increase the value to the next possible value and set it using the getter
    :param values: list of values
    :param getter: Function returning a value in values
    :param setter: Function taking a value from values
    :param name: Name of the thing, used in a potential error message
    :return: The new value
    """
    current_val = getter()
    new_idx = values.index(current_val) + 1
    if new_idx > len(values):
        raise RuntimeError(f"Can not increase '{name}', already at maximum ({current_val})")
    new_val = values[new_idx]
    setter(new_val)
    return new_val




def decrease_value(values, getter, setter, name):
    """
    From a list of values, get the current value, decrease the value to the next possible value and set it using the getter
    :param values: list of values
    :param getter: Function returning a value in values
    :param setter: Function taking a value from values
    :param name: Name of the thing, used in a potential error message
    :return: The new value
    """
    current_val = getter()
    new_idx = values.index(current_val) - 1
    if new_idx > len(values):
        raise RuntimeError(f"Can not decrease '{name}', already at minimum ({current_val})")
    new_val = values[new_idx]
    setter(new_val)
    return new_val