"""Displays and changes the current keyboard layout

Requires the following executable:
    * xkb-switch
"""

import core.module
import core.widget
import core.decorators
import core.input

import util.cli

class Module(core.module.Module):
    @core.decorators.every(seconds=60)
    def __init__(self, config):
        super().__init__(config, core.widget.Widget(self.current_layout))

        core.input.register(
            self,
            button=core.input.LEFT_MOUSE,
            cmd=self.__next_keymap)
        self.__current_layout = self.__get_current_layout()

    def current_layout(self, _):
        return self.__current_layout

    def __next_keymap(self, event):
        util.cli.execute('xkb-switch -n', ignore_errors=True)

    def __get_current_layout(self):
        try:
            res = util.cli.execute('xkb-switch')
            return res.split('\n')[0]
        except RuntimeError:
            return ['n/a']

    def update(self):
        self.__current_layout = self.__get_current_layout()

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