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#!/usr/bin/env python3
#
# Copyright 2024 David Vazgenovich Shakaryan
import glob
import subprocess
import threading
import time
from datetime import datetime, timezone
from zoneinfo import ZoneInfo
def fmt_label(s):
return f'%{{F#7b51ca}}{s}%{{F-}}'
def spacing(n = 1):
return f'%{{O{n * 7}}}'
class Mod:
def __init__(self):
self.cv = None
self.t = None
self.out = None
def run(self):
if callable(getattr(self, 'work', None)):
self.t = threading.Thread(target=self.work, daemon=True)
self.t.start()
def process_cmd(self, cmd):
pass
class ModRight(Mod):
def __init__(self):
self.out = '%{r}'
class ModSpacer(Mod):
def __init__(self, n=1):
self.out = spacing(n)
class ModDate(Mod):
def __init__(self, fmts=None, tzs=None):
super().__init__()
self.e = threading.Event()
self.fmts = fmts or ('%H:%M',)
self.fmt = 0
self.tzs = tzs or ({'id': None},)
self.tz = 0
def work(self):
while True:
fmt = self.fmts[self.fmt]
tz = self.tzs[self.tz]
tz_id = tz['id']
tz_label = tz.get('label')
dt = datetime.now().astimezone(ZoneInfo(tz_id) if tz_id else None)
label = tz_label or dt.strftime('%Z')
buf = (f'%{{A4:{id(self)} tz +1:}}%{{A5:{id(self)} tz -1:}}'
f'%{{A:{id(self)} tz:}}{fmt_label(label)}%{{A}}{spacing()}'
f'%{{A:{id(self)} fmt:}}{dt.strftime(fmt)}%{{A}}'
'%{A}%{A}')
with self.cv:
self.out = buf
self.cv.notify()
self.e.wait(1 - (dt.microsecond / 1000000))
self.e.clear()
def process_cmd(self, cmd):
if cmd == 'fmt':
self.fmt = (self.fmt + 1) % len(self.fmts)
self.e.set()
elif cmd.startswith('tz'):
self.tz = (self.tz + int(cmd[3:] or 1)) % len(self.tzs)
self.e.set()
class ModHLWM(Mod):
def __init__(self):
super().__init__()
self.out_tags = None
self.out_title = None
def flush(self):
self.out = f'{self.out_tags}{spacing()}{self.out_title}'
def fmt_tag(self, sym, tag, tagstr):
buf = f'%{{A:{id(self)} use {tag}:}}'
match sym:
case '.':
buf += f'%{{F#777777}}%{{O7}}{tag}%{{O7}}%{{F-}}'
case '#':
buf += (f'%{{B#333333}}%{{U#7b51ca}}%{{+u}}%{{O7}}%{{T2}}'
f'{tag}%{{T-}}%{{O7}}%{{-u}}%{{U-}}%{{B-}}')
case '!':
if '#' in tagstr:
buf += (f'%{{B#a03000}}%{{U#000000}}%{{+u}}%{{O7}}'
f'{tag}%{{O7}}%{{-u}}%{{U-}}%{{B-}}')
else:
buf += (f'%{{B#a03000}}%{{U#7b51ca}}%{{+u}}%{{O7}}%{{T2}}'
f'{tag}%{{T-}}%{{O7}}%{{-u}}%{{U-}}%{{B-}}')
case ':':
buf += f'%{{O7}}{tag}%{{O7}}'
buf += '%{A}'
return buf
def refresh_tags(self):
res = subprocess.run(
('herbstclient', 'tag_status'),
stdout=subprocess.PIPE, text=True)
tagstr = res.stdout.strip()
tags = tagstr.split('\t')
buf = (f'%{{A4:{id(self)} use_index +1:}}'
f'%{{A5:{id(self)} use_index -1:}}')
for tag in tags:
buf += self.fmt_tag(tag[0], tag[1:], tagstr)
buf += '%{A}%{A}'
with self.cv:
self.out_tags = buf
self.flush()
self.cv.notify()
def refresh_title(self):
res = subprocess.run(
('herbstclient', 'attr', 'clients.focus.title'),
stdout=subprocess.PIPE, stderr=subprocess.DEVNULL, text=True)
title = res.stdout.strip()
buf = title if len(title) < 65 else title[0:63] + '…'
with self.cv:
self.out_title = buf
self.flush()
self.cv.notify()
def work(self):
p = subprocess.Popen(
('herbstclient', '--idle'),
stdout=subprocess.PIPE, text=True)
self.refresh_tags()
self.refresh_title()
for line in iter(p.stdout.readline, ''):
if line.startswith('tag_'):
self.refresh_tags()
elif (line.startswith('focus_changed') or
line.startswith('window_title_changed')):
self.refresh_title()
def process_cmd(self, cmd):
subprocess.run(('herbstclient', *cmd.split()))
class ModNoKBD(Mod):
def __init__(self):
super().__init__()
self.prev = True
def work(self):
while True:
has_kbd = bool(glob.glob('/dev/input/by-id/*-kbd'))
if has_kbd != self.prev:
if has_kbd:
buf = None
else:
buf = f'%{{B#a03000}}{spacing()}NO KBD{spacing()}%{{B-}}'
self.prev = has_kbd
with self.cv:
self.out = buf
self.cv.notify()
time.sleep(1)
class Bar:
def __init__(self, *mods):
self.cv = threading.Condition()
self.mods = mods
for m in self.mods:
m.cv = self.cv
self.mod_by_id = {id(m): m for m in self.mods}
def process_cmds(self, pipe):
while True:
line = pipe.readline()
if not line:
break
mod_id, cmd = line.rstrip().split(' ', 1)
if mod := self.mod_by_id.get(int(mod_id)):
mod.process_cmd(cmd)
def run(self):
for mod in self.mods:
mod.run()
self.bar = subprocess.Popen(
('/home/david/lemonbar-xft/lemonbar',
'-bf', 'Monospace:size=10:dpi=96',
'-f', 'Monospace:size=10:dpi=96:bold',
'-u', '2', '-g', '1920x22', '-a', '100'),
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
text=True)
threading.Thread(
target=self.process_cmds,
args=(self.bar.stdout,),
daemon=True
).start()
while True:
with self.cv:
self.cv.wait()
print(''.join([m.out for m in self.mods if m.out]),
file=self.bar.stdin, flush=True)
Bar(
ModHLWM(),
ModRight(),
ModNoKBD(),
ModSpacer(n=2),
ModDate(
fmts=('%Y-%m-%d %H:%M:%S', '%H:%M'),
tzs=({'id': None}, {'id': 'UTC'},
{'id': 'Asia/Yerevan', 'label': 'AMT'})),
ModSpacer()
).run()
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