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+#!/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 <http://www.gnu.org/licenses/>.
+
+import sys
+import time
+import signal
+import datetime
+
+
+## Warn if we are using configuration script arguments
+if len(parser.files) > 0:
+ print('%s: warning: configuration script arguments are not supported in ad-hoc mode' % sys.argv[0])
+
+## Determine whether we should run in continuous mode
+continuous = any(map(lambda a : (a is not None) and (len(a) == 2), settings))
+continuous = continuous or (location is not None)
+
+## Select default settings when not specified
+d = lambda a, default : [default, default] if a is None else (a * 2 if len(a) == 1 else a)
+gammas = d(gammas, "1:1:1")
+rgb_brightnesses = d(rgb_brightnesses, "1")
+cie_brightnesses = d(cie_brightnesses, "1")
+if temperatures is None:
+ temperatures = ['3700', '6500']
+elif len(temperatures) == 1:
+ temperatures *= 2
+
+## Parse string arrays into floating point matrices
+settings = [gammas, rgb_brightnesses, cie_brightnesses, temperatures, [location]]
+s = lambda f, v : f(v) if v is not None else None
+settings = [s(lambda c : [s(lambda x : [float(y) for y in x.split(':')], x) for x in c], c) for c in settings]
+[gammas, rgb_brightnesses, cie_brightnesses, temperatures, location] = settings
+location = None if location is None else location[0]
+
+## Select method for calculating to what degree the adjustments should be applied
+alpha = lambda : 1
+if continuous:
+ if location is not None:
+ alpha = lambda : sun(*location)
+ else:
+ def alpha_():
+ now = datetime.datetime.now()
+ hh, mm = now.hour, now.minute + now.second / 60
+ if 12 <= hh <= 22:
+ return 1 - (hh - 12) / (22 - 12) - mm / 60
+ if hh <= 12:
+ hh += 22 - 12
+ return (hh - 22) / 14 + m / 60
+ alpha = alpha_
+
+## Set monitor control
+def reduce(f, items):
+ '''
+ https://en.wikipedia.org/wiki/Fold_(higher-order_function)
+ '''
+ if len(items) < 2:
+ return items
+ rc = items[0]
+ for i in range(1, len(items)):
+ rc = f(rc, items[i])
+ return rc
+output = reduce(lambda x, y : x + y, [a.split(',') for a in output])
+monitor_controller = lambda : randr(*output)
+
+def apply(dayness, pureness):
+ '''
+ Apply adjustments
+
+ @param dayness:float The visibility of the sun
+ @param pureness:float Transitioning progress, 1 for at clean state, 0 for at adjusted state
+ '''
+ start_over()
+ interpol_ = lambda d, p, a, r : d * r + (p[0] * a + p[1] * (1 - a)) * (1 - r)
+ interpol = lambda d, p : [interpol_(d, [p[0][i], p[1][i]], dayness, pureness) for i in range(len(p[0]))]
+ temperature(*interpol(6500, temperatures), algorithm = lambda t : divide_by_maximum(cmf_10deg(t)))
+ rgb_brightness(*interpol(1, rgb_brightnesses))
+ cie_brightness(*interpol(1, cie_brightnesses))
+ clip()
+ gamma(*interpol(1, gammas))
+ clip()
+ monitor_controller()
+
+if continuous and not doreset:
+ ## Continuous mode
+ def periodically(year, month, day, hour, minute, second, weekday, fade):
+ apply(alpha(), 0 if fade is None else 1 - abs(fade))
+else:
+ ## One shot mode
+ if not panicgate:
+ signal.signal(signal.SIGTERM, signal_SIGTERM)
+ trans = 0
+ while running:
+ try:
+ apply(alpha(), trans if doreset else 1 - trans)
+ trans += 0.05
+ time.sleep(0.1)
+ except KeyboardInterrupt:
+ signal_SIGTERM(0, None)
+ if trans >= 1:
+ break
+ apply(alpha(), 1 if doreset else 0)
+