#!/usr/bin/env python3 # Copyright © 2014 Mattias Andrée (maandree@member.fsf.org) # # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU Affero 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 Affero General Public License for more details. # # You should have received a copy of the GNU Affero General Public License # along with this program. If not, see . import os import sys import time import signal import datetime ## Set global variables global DATADIR, i_size, o_size, r_curve, g_curve, b_curve, clip_result, reset global periodically, wait_period, fadein_time, fadeout_time, fadein_steps, fadeout_steps global monitor_controller, running, continuous_run, panic global signal_SIGTERM from solar import * from curve import * from colour import * from monitor import * config_file = None periodically = None ''' :(int, int, int, int, int, int, int, float?)?→void Place holder for periodically invoked function Invoked periodically If you want to control at what to invoke this function next time you can set the value of the global variable `wait_period` to the number of seconds to wait before invoking this function again. The value does not need to be an integer. @param year:int The year @param month:int The month, 1 = January, 12 = December @param day:int The day, minimum value is 1, probable maximum value is 31 (*) @param hour:int The hour, minimum value is 0, maximum value is 23 @param minute:int The minute, minimum value is 0, maximum value is 59 @param second:int The second, minimum value is 0, probable maximum value is 60 (**) @param weekday:int The weekday, 1 = Monday, 7 = Sunday @param fade:float? Blueshift can use this function to fade into a state when it start or exits. `fade` can either be negative, zero or positive or `None`, but the magnitude of value cannot exceed 1. When Blueshift starts, the this function will be invoked multiple with the time parameters of the time it is invoked and each time `fade` will increase towards 1, starting at 0, when the value is 1, the settings should be applied to 100 %. After this this function will be invoked once again with `fade` being `None`. When Blueshift exits the same behaviour is used except, `fade` decrease towards -1 but start slightly below 0, when -1 is reached all settings should be normal. Then Blueshift will NOT invoke this function with `fade` being `None`, instead it will by itself revert all settings and quit. (*) Can be exceeded if the calendar system is changed, like in 1712-(02)Feb-30 (**) See https://en.wikipedia.org/wiki/Leap_second ''' wait_period = 60 ''' :float The number of seconds to wait before invoking `periodically` again ''' monitor_controller = lambda : randr() ''' :()→void Function used by Blueshift on exit to apply reset colour curves, if using preimplemented `reset` ''' fadein_time = 2 ''' :float? The number of seconds used to fade in on start, `None` for no fading ''' fadeout_time = 2 ''' :float? The number of seconds used to fade out on exit, `None` for no fading ''' fadein_steps = 40 ''' :int The number of steps in the fade in phase, if any ''' fadeout_steps = 40 ''' :int The number of steps in the fade out phase, if any ''' running = True ''' :bool `True` while to program has not received a terminate signal ''' panic = False ''' :bool `True` if the program has received two terminate signals ''' def reset(): ''' Invoked to reset the displays ''' start_over() monitor_controller() def signal_SIGTERM(signum, frame): ''' Signal handler for SIGTERM @param signum The signal number, 0 if called from the program itself @param frame Ignore, it will probably be `None` ''' global running, panic if not running: panic = True running = False def continuous_run(): ''' Invoked to run continuously if `periodically` is not `None` ''' global running, wait_period, fadein_time, fadeout_time, fadein_steps, fadeout_steps def p(t, fade = None): try: wd = t.isocalendar()[2] periodically(t.year, t.month, t.day, t.hour, t.minute, t.second, wd, fade) except: signal_SIGTERM(0, None) def sleep(seconds): try: time.sleep(seconds) except KeyboardInterrupt: signal_SIGTERM(0, None) ## Catch signals signal.signal(signal.SIGTERM, signal_SIGTERM) ## Fade in early_exit = False ftime = 0 if fadein_time is not None: dtime = fadein_time / fadein_steps df = 1 / fadein_steps while running: ftime += df if ftime > 1: break p(datetime.datetime.now(), ftime) sleep(dtime) if ftime <= 1: early_exit = True ## Run periodically if not early_exit: while running: p(datetime.datetime.now(), None) if running: sleep(wait_period) ## Fade out if fadeout_time is not None: dtime = fadeout_time / fadeout_steps df = 1 / fadeout_steps if not early_exit: ftime = 1 while not panic: ftime -= df if ftime <= 0: break p(datetime.datetime.now(), -ftime) sleep(dtime) ## Reset reset() ## Load extension and configurations via blueshiftrc if config_file is None: for file in ('$XDG_CONFIG_HOME/%/%rc', '$HOME/.config/%/%rc', '$HOME/.%rc', '/etc/%rc'): file = file.replace('%', 'blueshift') for arg in ('XDG_CONFIG_HOME', 'HOME'): if '$' + arg in file: if arg in os.environ: file = file.replace('$' + arg, os.environ[arg].replace('$', '\0')) else: file = None break if file is not None: file = file.replace('\0', '$') if os.path.exists(file): config_file = file break if config_file is not None: code = None with open(file, 'rb') as script: code = script.read() code = code.decode('utf8', 'error') + '\n' code = compile(code, file, 'exec') g, l = globals(), dict(locals()) for key in l: g[key] = l[key] exec(code, g) else: print('No configuration file found') sys.exit(1) ## Run periodically if configured to if periodically is not None: continuous_run() close_c_bindings()