nvim_clock.py

from threading import Thread, Lock
from time import sleep, strftime

def msg(vim, msg):
    vim.command('echom "%s"' % (msg,))

class EventLoop(Thread):
    def __init__(self, vim):
        super(EventLoop, self).__init__()
        self.vim = vim
        self.lock = Lock()
        self.intervals = []

    def setInterval(self, event):
        self.intervals.append(event)

    def run(self):
        while True:
            sleep(0.01)
            with self.lock:
                for interval in self.intervals:
                    self.vim.session.post(interval)



class NvimClock(object):
    def __init__(self, vim):
        self.vim = vim
        self.eventLoop = EventLoop(vim)
        self.msg('Initing NvimClock')
        vim.command('command! ClockStart call rpcrequest(%d, "clock_start")' %
                            self.vim.channel_id)
        vim.command('command! ClockStop call rpcrequest(%d, "clock_stop")' %
                            self.vim.channel_id)

    def clock_start(self):
        self.msg('Starting NvimClock')
        self.eventLoop.setInterval('tick')
        self.eventLoop.start()

    def clock_stop(self):
        self.msg('Stopping NvimClock')
        self.eventLoop.end()


    def on_tick(self):
        self.vim.command('set statusline=%s' % (self.get_clock(),))

    def get_clock(self):
        return strftime("%H:%M:%S")

    def msg(self, newMsg):
        msg(self.vim, newMsg)