Source code for powerline.selectors.i3wm

from powerline.theme import layered_selector

@layered_selector
def output(target_outputs):
    '''Returns True if the current output rendered to is contained in ``target_output``

    :param list target_outputs:
        The outputs to filter.
    '''

    return lambda pl, segment_info, mode: (
        'output' in segment_info
        and segment_info['output'] in target_outputs
    )

@layered_selector
def channel_full(channel_name):
    '''Returns True while the specified channel exists and is filled with any value.

    :param string channel_name:
        The channel to check.
    '''

    return lambda pl, segment_info, mode: (
        'payloads' in segment_info
        and channel_name in segment_info['payloads']
        and segment_info['payloads'][channel_name]
    )

@layered_selector
def channel_empty(channel_name):
    '''Returns True while the specified channel is empty or does not exist

    :param string channel_name:
        The channel to check.
    '''

    return lambda pl, segment_info, mode: (
        not 'payloads' in segment_info
        or not channel_name in segment_info['payloads']
        or not segment_info['payloads'][channel_name]
    )

@layered_selector
def channel_has_value(channel_name, value):
    '''Returns True while the specified channel is filled with the specified value

    :param string channel_name:
        The channel to check.
    :param string value:
        The value to check against.
    '''

    return lambda pl, segment_info, mode: (
        'payloads' in segment_info
        and channel_name in segment_info['payloads']
        and (
            isinstance(segment_info['payloads'][channel_name], str)
            and segment_info['payloads'][channel_name] == value
        ) or (
            len(segment_info['payloads'][channel_name]) == 2
            and segment_info['payloads'][channel_name][0] == value
        )
    )