129 lines
3.9 KiB
Python
129 lines
3.9 KiB
Python
#
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# Gramps - a GTK+/GNOME based genealogy program
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#
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# Copyright (C) 2001 Donald N. Allingham
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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"""
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Gregorian calendar module for GRAMPS.
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The original algorithms for this module came from Scott E. Lee's
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C implementation. The original C source can be found at Scott's
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web site at http://www.scottlee.com
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"""
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__author__ = "Donald N. Allingham"
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__version__ = "$Revision$"
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#-------------------------------------------------------------------------
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#
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# python modules
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#
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#-------------------------------------------------------------------------
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import math
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#-------------------------------------------------------------------------
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#
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# Gramps Modules
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#
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#-------------------------------------------------------------------------
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import Calendar
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from intl import gettext as _
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#-------------------------------------------------------------------------
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#
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# Persian
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#
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#-------------------------------------------------------------------------
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class Persian(Calendar.Calendar):
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"""Persian Calendar"""
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EPOCH = 1948320.5
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SDN_475_1_1 = 2121446
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MONTHS = [ "Farvardin", "Ordibehesht", "Khordad", "Tir", "Mordad",
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"Shahrivar", "Mehr", "Aban", "Azar", "Dey", "Bahman", "Esfand" ]
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M2NUM = {
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"farvardin" : 1, "ordibehesht" : 2, "khordad" : 3,
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"tir" : 4, "mordad" : 5, "shahrivar" : 6,
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"mehr" : 7, "aban" : 8, "azar" : 9,
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"dey" : 10, "bahman" : 11, "esfand" : 12
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}
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NAME = "Persian"
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TNAME = _("Persian")
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def quote_display(self,year,month,day,mode):
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return "%s (%s)" % (self.display(year,month,day,mode),Persian.NAME)
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def set_month_string(self,text):
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try:
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return Persian.M2NUM[unicode(text.lower())]
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except KeyError:
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return Calendar.UNDEF
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def month(self,val):
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try:
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return Persian.MONTHS[val-1]
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except:
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return "Illegal Month"
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def get_sdn(self,year, month, day):
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if year >= 0:
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epbase = year - 474
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else:
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epbase = year - 473
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epyear = 474 + epbase % 2820
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if month <= 7:
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v1 = (month - 1) * 31
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else:
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v1 = ((month - 1) * 30) + 6
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v2 = math.floor(((epyear * 682) - 110) / 2816)
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v3 = (epyear - 1) * 365 + day
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v4 = math.floor(epbase / 2820) * 1029983
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return int(math.ceil(v1 + v2 + v3 + v4 + Persian.EPOCH - 1))
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def get_ymd(self,sdn):
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sdn = math.floor(sdn) + 0.5
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depoch = sdn - self.get_sdn(475,1,1)
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cycle = math.floor(depoch / 1029983)
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cyear = depoch % 1029983
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if cyear == 1029982:
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ycycle = 2820
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else:
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aux1 = math.floor(cyear / 366)
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aux2 = cyear % 366
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ycycle = math.floor(((2134 * aux1) + (2816 * aux2) + 2815) / 1028522) + aux1 + 1;
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year = ycycle + (2820 * cycle) + 474
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if year <= 0:
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year = year - 1;
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yday = sdn - self.get_sdn(year, 1, 1) + 1
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if yday < 186:
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month = math.ceil(yday / 31)
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else:
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month = math.ceil((yday - 6) / 30)
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day = (sdn - self.get_sdn(year, month, 1)) + 1
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return (int(year), int(month), int(day))
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Calendar.register(Persian)
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