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#!/usr/bin/env python3
# -*- python -*-
'''
nightshift - A terminal user interface for redshift
Copyright © 2014 Mattias Andrée (m@maandree.se)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
'''
import sys
import fcntl
import struct
import signal
import termios
import threading
ui_state = { 'focus' : 0
}
def user_interface():
'''
Start user interface
'''
global red_condition
red_condition = threading.Condition()
ui_winch()
daemon_thread(ui_status).start()
daemon_thread(ui_refresh).start()
print('\033[?1049h\033[?25l')
saved_stty = termios.tcgetattr(sys.stdout.fileno())
stty = termios.tcgetattr(sys.stdout.fileno())
stty[3] &= ~(termios.ICANON | termios.ECHO | termios.ISIG)
try:
termios.tcsetattr(sys.stdout.fileno(), termios.TCSAFLUSH, stty)
sock.sendall('status\n'.encode('utf-8'))
ui_read()
finally:
termios.tcsetattr(sys.stdout.fileno(), termios.TCSAFLUSH, saved_stty)
sys.stdout.buffer.write('\033[?25h\033[?1049l'.encode('utf-8'))
sys.stdout.buffer.flush()
def ui_print():
_button = lambda *i : ('[\033[1m%s\033[m]' if ui_state['focus'] in i else '<%s>')
temperature = tuple([red_temperature] + list(red_temperatures))
brightness = [b * 100 for b in [red_brightness] + list(red_brightnesses)]
print('\033[H', end = '')
if red_running:
lat, lon = red_location
_if = lambda pn, v : pn[0] if v >= 0 else pn[1]
print('\033[2KLocation: %.4f°%s %.4f°%s' % (abs(lat), _if('NS', lat), abs(lon), _if('EW', lon)))
print('\033[2KTemperature: %.0f K (day: %.0f K, night: %.0f K)' % tuple(temperature))
print('\033[2KBrightness: %.0f %% (day: %.0f %%, night: %.0f %%)' % tuple(brightness))
print('\033[2KDayness: %.0f %%' % (red_period * 100))
print('\033[2K' + ('Dying' if red_dying else ('Enabled' if red_status else 'Disabled')))
print('\033[2K\n\033[2K', end = '')
if not red_dying:
if red_frozen:
print(_button(0, 1) % 'Thaw', end = ' ')
print(_button(2) % 'Kill', end = ' ')
print(_button(3) % 'Close')
else:
print(_button(0) % ('Disable' if red_status else 'Enable'), end = ' ')
print(_button(1) % 'Freeze', end = ' ')
print(_button(2) % 'Kill', end = ' ')
print(_button(3) % 'Close')
else:
print(_button(0, 1, 2) % 'Kill immediately', end = ' ')
print(_button(3) % 'Close')
else:
print('\033[2KNot running')
print('\033[2K\n\033[2K', end = '')
print(_button(0, 1, 2) % 'Revive', end = ' ')
print(_button(3) % 'Close')
print('\033[J')
def ui_read():
global red_dying, red_frozen
inbuf = sys.stdin.buffer
while True:
c = inbuf.read(1)
if c == b'q':
break
elif c == b'\t':
red_condition.acquire()
try:
if red_running and not red_dying:
if red_frozen and (ui_state['focus'] == 0):
ui_state['focus'] = 1
ui_state['focus'] = (ui_state['focus'] + 1) % 4
if red_frozen and (ui_state['focus'] == 0):
ui_state['focus'] = 1
elif ui_state['focus'] == 3:
ui_state['focus'] = 0
else:
ui_state['focus'] = 3
red_condition.notify()
finally:
red_condition.release()
elif c in b' \n':
red_condition.acquire()
try:
if ui_state['focus'] == 3:
break
elif red_running:
if red_dying or (ui_state['focus'] == 2):
sock.sendall('kill\n'.encode('utf-8'))
red_dying = True
elif red_frozen:
sock.sendall('thaw\n'.encode('utf-8'))
red_frozen = False
else:
if ui_state['focus'] == 0:
sock.sendall('toggle\n'.encode('utf-8'))
elif ui_state['focus'] == 1:
sock.sendall('freeze\n'.encode('utf-8'))
red_frozen = True
red_condition.notify()
else:
respawn_daemon()
daemon_thread(ui_status).start()
sock.sendall('status\n'.encode('utf-8'))
sock.sendall('listen\n'.encode('utf-8'))
finally:
red_condition.release()
def ui_refresh():
while True:
red_condition.acquire()
try:
red_condition.wait()
ui_print()
finally:
red_condition.release()
def ui_winch():
global height, width
(height, width) = struct.unpack('hh', fcntl.ioctl(sys.stdout.fileno(), termios.TIOCGWINSZ, '1234'))
def winch(signal, frame):
global height, width
(height, width) = struct.unpack('hh', fcntl.ioctl(sys.stdout.fileno(), termios.TIOCGWINSZ, '1234'))
red_condition.acquire()
try:
red_condition.notify()
finally:
red_condition.release()
signal.signal(signal.SIGWINCH, winch)
def ui_status():
buf = ''
continue_to_run = True
while continue_to_run:
while '\n\n' not in buf:
got = sock.recv(1024)
if (got is None) or (len(got) == 0):
continue_to_run = False
break
buf += got.decode('utf-8', 'replace')
if '\n\n' in buf:
break
if continue_to_run:
msg, buf = buf.split('\n\n')[0], '\n\n'.join(buf.split('\n\n')[1:])
ui_status_callback(dict([line.split(': ') for line in msg.split('\n')]))
ui_status_callback(None)
def ui_status_callback(status):
global red_brightness, red_temperature, red_brightnesses, red_temperatures
global red_period, red_location, red_status, red_running, red_dying, red_frozen
if status is not None:
brightness = [float(status['%s brightness' % k]) for k in ('Current', 'Daytime', 'Night')]
temperature = [float(status['%s temperature' % k]) for k in ('Current', 'Daytime', 'Night')]
red_condition.acquire()
try:
red_brightness, red_brightnesses = brightness[0], tuple(brightness[1:])
red_temperature, red_temperatures = temperature[0], tuple(temperature[1:])
red_period = float(status['Dayness'])
red_location = (float(status['Latitude']), float(status['Longitude']))
red_status = status['Enabled'] == 'yes'
red_running = status['Running'] == 'yes'
red_dying = status['Dying'] == 'yes'
red_frozen = status['Frozen'] == 'yes'
red_condition.notify()
finally:
red_condition.release()
else:
red_condition.acquire()
try:
red_running = False
red_condition.notify()
finally:
red_condition.release()
def daemon_thread(target, **kwargs):
thread = threading.Thread(target = target, **kwargs)
thread.setDaemon(True)
return thread
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