Class: When::V::Event::Enumerator::Logic::Enumerator

Inherits:
When::V::Event::Enumerator::Logic show all
Defined in:
lib/when_exe/icalendar.rb

Overview

外部 Enumerator 用いた繰り返し

春分日、秋分日、復活祭などの指定に用いる

Instance Attribute Summary collapse

Attributes inherited from When::V::Event::Enumerator::Logic

#by_part, #cash, #freq_index, #list

Instance Method Summary collapse

Methods inherited from When::V::Event::Enumerator::Logic

#_bound

Constructor Details

#initialize(by_part, list, position, ref, start) ⇒ Enumerator


1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
# File 'lib/when_exe/icalendar.rb', line 1514

def initialize(by_part, list, position, ref, start)
  @by_part = by_part
  @ref     = When.Resource(ref, '_n:')
  @start   = start
  @list    = list.split(/,/).map {|w|
    raise ArgumentError, "The #{by_part} rule format error" unless w =~ /^(([-+]?\d+)\*)?(.+?)([-+]\d+)?$/
    nth, spec, period = $~[2..4]
    nth    = (nth) ? nth.to_i : position
    period  = When::TM::PeriodDuration.new((period||0).to_i, PostFreqIndex[@by_part])
    [nth, spec, period]
  }
end

Instance Attribute Details

#refObject (readonly)

Returns the value of attribute ref


1482
1483
1484
# File 'lib/when_exe/icalendar.rb', line 1482

def ref
  @ref
end

#startObject (readonly)

Returns the value of attribute start


1483
1484
1485
# File 'lib/when_exe/icalendar.rb', line 1483

def start
  @start
end

Instance Method Details

#_candidates(lower_bound, higher_bound) ⇒ Object


1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
# File 'lib/when_exe/icalendar.rb', line 1486

def _candidates(lower_bound, higher_bound)
  candidate = []
  @list.each do |ord|
    nth, spec, period = ord
    shift = (period[PostFreqIndex[@by_part]] != 0)
    raise ArgumentError, "n*e+/-s format not permitted" if (nth || shift) && @freq_index >= When::DAY
    if (nth==nil || nth>0)
      enum = @ref.enum_for(lower_bound, :forward, spec)
    else
      enum = @ref.enum_for(higher_bound, :reverse, spec)
    end
    if (nth)
      date = nil
      nth.abs.times {date = enum.succ}
      date += period if shift
      candidate << date
    else
      enum.each do |date|
        date += period if shift
        break unless date < higher_bound
        candidate << date
      end
    end
  end
  return candidate
end