/usr/share/pyshared/pycalendar/recurrenceset.py is in python-pycalendar 2.0~svn188-1.
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# Copyright (c) 2007-2011 Cyrus Daboo. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
##
from pycalendar.utils import set_difference
class PyCalendarRecurrenceSet(object):
def __init__(self):
self.mRrules = []
self.mExrules = []
self.mRdates = []
self.mExdates = []
self.mRperiods = []
self.mExperiods = []
def duplicate(self):
other = PyCalendarRecurrenceSet()
other.mRrules = [i.duplicate() for i in self.mRrules]
other.mExrules = [i.duplicate() for i in self.mExrules]
other.mRdates = [i.duplicate() for i in self.mRdates]
other.mExdates = [i.duplicate() for i in self.mExdates]
other.mRperiods = [i.duplicate() for i in self.mRperiods]
other.mExperiods = [i.duplicate() for i in self.mExperiods]
return other
def hasRecurrence(self):
return ((len(self.mRrules) != 0) or (len(self.mRdates) != 0) or (len(self.mRperiods) != 0)
or (len(self.mExrules) != 0) or (len(self.mExdates) != 0)
or (len(self.mExperiods) != 0))
def equals(self, comp):
# Look at RRULEs
if not self.equalsRules(self.mRrules, comp.self.mRrules):
return False
# Look at EXRULEs
if not self.equalsRules(self.mExrules, comp.self.mExrules):
return False
# Look at RDATEs
if not self.equalsDates(self.mRdates, comp.self.mRdates):
return False
if not self.equalsPeriods(self.mRperiods, comp.self.mRperiods):
return False
# Look at EXDATEs
if not self.equalsDates(self.mExdates, comp.self.mExdates):
return False
if not self.equalsPeriods(self.mExperiods, comp.self.mExperiods):
return False
# If we get here they match
return True
def equalsRules(self, rules1, rules2):
# Check sizes first
if len(rules1) != len(rules2):
return False
elif len(rules1) == 0:
return True
# Do sledge hammer O(n^2) approach as its not easy to sort these things
# for a smarter test.
# In most cases there will only be one rule anyway, so this should not
# be too painful.
temp2 = rules2[:]
for r1 in rules1:
found = False
for r2 in temp2:
if r1.equals(r2):
# Remove the one found so it is not tested again
temp2.remove(r2)
found = True
break
if not found:
return False
return True
def equalsDates(self, dates1, dates2):
# Check sizes first
if len(dates1) != len(dates2):
return False
elif len(dates1) == 0:
return True
# Copy each and sort for comparison
dt1 = dates1[:]
dt2 = dates2[:]
dt1.sort(key=lambda x:x.getPosixTime())
dt2.sort(key=lambda x:x.getPosixTime())
return dt1.equal(dt2)
def equalsPeriods(self, periods1, periods2):
# Check sizes first
if len(periods1) != len(periods2):
return False
elif len(periods1) == 0:
return True
# Copy each and sort for comparison
p1 = periods1[:]
p2 = periods2[:]
p1.sort()
p2.sort()
return p1.equal(p2)
def addRule(self, rule):
self.mRrules.append(rule)
def subtractRule(self, rule):
self.mExrules.append(rule)
def addDT(self, dt):
self.mRdates.append(dt)
def subtractDT(self, dt):
self.mExdates.append(dt)
def addPeriod(self, p):
self.mRperiods.append(p)
def subtractPeriod(self, p):
self.mExperiods.append(p)
def getRules(self):
return self.mRrules
def getExrules(self):
return self.mExrules
def getDates(self):
return self.mRdates
def getExdates(self):
return self.mExdates
def getPeriods(self):
return self.mRperiods
def getExperiods(self):
return self.mExperiods
def expand(self, start, range, items, float_offset=0):
# Need to return whether the limit was applied or not
limited = False
# Now create list of items to include
include = []
# Always include the initial DTSTART if within the range
if range.isDateWithinPeriod(start):
include.append(start)
else:
limited = True
# RRULES
for iter in self.mRrules:
if iter.expand(start, range, include, float_offset=float_offset):
limited = True
# RDATES
for iter in self.mRdates:
if range.isDateWithinPeriod(iter):
include.append(iter)
else:
limited = True
for iter in self.mRperiods:
if range.isPeriodOverlap(iter):
include.append(iter.getStart())
else:
limited = True
# Make sure the list is unique
include = [x for x in set(include)]
include.sort(key=lambda x:x.getPosixTime())
# Now create list of items to exclude
exclude = []
# EXRULES
for iter in self.mExrules:
iter.expand(start, range, exclude, float_offset=float_offset)
# EXDATES
for iter in self.mExdates:
if range.isDateWithinPeriod(iter):
exclude.append(iter)
for iter in self.mExperiods:
if range.isPeriodOverlap(iter):
exclude.append(iter.getStart())
# Make sure the list is unique
exclude = [x for x in set(exclude)]
exclude.sort(key=lambda x:x.getPosixTime())
# Add difference between to the two sets (include - exclude) to the
# results
items.extend(set_difference(include, exclude))
return limited
def changed(self):
# RRULES
for iter in self.mRrules:
iter.clear()
# EXRULES
for iter in self.mExrules:
iter.clear()
def excludeFutureRecurrence(self, exclude):
# Adjust RRULES to end before start
for iter in self.mRrules:
iter.excludeFutureRecurrence(exclude)
# Remove RDATES on or after start
self.mRdates.removeOnOrAfter(exclude)
for iter in self.mRperiods:
if iter > exclude:
self.mRperiods.remove(iter)
# UI operations
def isSimpleUI(self):
# Right now the Event dialog only handles a single RRULE (but we allow
# any number of EXDATES as deleted
# instances will appear as EXDATES)
if ((len(self.mRrules) > 1) or (len(self.mExrules) > 0)
or (len(self.mRdates) > 0) or (len(self.mRperiods) > 0)):
return False
# Also, check the rule iteself
elif len(self.mRrules) == 1:
return self.mRrules.firstElement().isSimpleRule()
else:
return True
def isAdvancedUI(self):
# Right now the Event dialog only handles a single RRULE
if ((len(self.mRrules) > 1) or (len(self.mExrules) > 0)
or (len(self.mRdates) > 0) or (len(self.mRperiods) > 0)):
return False
# Also, check the rule iteself
elif len(self.mRrules) == 1:
return self.mRrules.firstElement().isAdvancedRule()
else:
return True
def getUIRecurrence(self):
if len(self.mRrules) == 1:
return self.mRrules[0]
else:
return None
def getUIDescription(self):
# Check for anything
if not self.hasRecurrence():
return "No Recurrence"
# Look for a single RRULE and return its descriptor
if ((len(self.mRrules) == 1) and (len(self.mExrules) == 0) and (len(self.mRdates) == 0)
and (len(self.mExdates) == 0) and (len(self.mRperiods) == 0)
and (len(self.mExperiods) == 0)):
return self.mRrules.firstElement().getUIDescription()
# Indicate some form of complex recurrence
return "Multiple recurrence rules, dates or exclusions"
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