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Contents
module RiCal
class PropertyValue
class DateTime
#- ©2009 Rick DeNatale, All rights reserved. Refer to the file README.txt for the license
#
# Methods for DateTime which support adding or subtracting another DateTime or Duration
module AdditiveMethods
# if end_time is nil => nil
# otherwise convert end_time to a DateTime and compute the difference
def duration_until(end_time) # :nodoc:
end_time && RiCal::PropertyValue::Duration.from_datetimes(timezone_finder, to_datetime, end_time.to_datetime)
end
# Double-dispatch method for subtraction.
def subtract_from_date_time_value(dtvalue) #:nodoc:
RiCal::PropertyValue::Duration.from_datetimes(timezone_finder, to_datetime,dtvalue.to_datetime)
end
# Double-dispatch method for addition.
def add_to_date_time_value(date_time_value) #:nodoc:
raise ArgumentError.new("Cannot add #{date_time_value} to #{self}")
end
# Return the difference between the receiver and other
#
# The parameter other should be either a RiCal::PropertyValue::Duration or a RiCal::PropertyValue::DateTime
#
# If other is a Duration, the result will be a DateTime, if it is a DateTime the result will be a Duration
def -(other)
other.subtract_from_date_time_value(self)
end
# Return the sum of the receiver and duration
#
# The parameter other duration should be a RiCal::PropertyValue::Duration
#
# The result will be an RiCal::PropertyValue::DateTime
def +(duration)
duration.add_to_date_time_value(self)
end
end
end
end
end
Version data entries
60 entries across 60 versions & 8 rubygems