Class: When::CalendarNote::Enumerator

Inherits:

Parts::Enumerator

• Object
• Enumerator
• Parts::Enumerator
• When::CalendarNote::Enumerator

Defined in:

lib/when_exe/calendarnote.rb

Overview

イベントを取得する Enumerator

Direct Known Subclasses

Week::Enumerator

Instance Attribute Summary

Attributes inherited from Parts::Enumerator

#count, #count_limit, #current, #direction, #exdate, #first, #index, #last, #object, #options, #parent, #processed

Instance Method Summary

• #_succ ⇒ When::TM::TemporalPosition

  次のイベントを得る.

• #initialize(*args) ⇒ Enumerator constructor

  オブジェクトの生成.

Methods inherited from Parts::Enumerator

_options, #_rewind, #each, #exclude_end, #has_next?, #next, #succ, #with_index, #with_object

Constructor Details

#initialize(parent, range, options) ⇒ Enumerator #initialize(parent, first, direction, options) ⇒ Enumerator

オブジェクトの生成

Overloads:

• #initialize(parent, range, options) ⇒ Enumerator

  Parameters:

  • parent (When::CalendarNote) —

    暦注アルゴリズム

  • range (Range, When::Parts::GeometricComplex) —

    始点 - range.first

    終点 - range.last

  • options (Hash) —

    以下の通り

  Options Hash (options):

  • :event (String) —

    イベント名

  • :count_limit (Integer) —

    繰り返し回数(デフォルトは指定なし)

• #initialize(parent, first, direction, options) ⇒ Enumerator

  Parameters:

  • parent (When::CalendarNote) —

    暦注アルゴリズム

  • first (When::TM::TemporalPosition) —

    始点

  • direction (Symbol) —

    (optionsで渡してもよい)

    :forward

    昇順(デフォルト)

    :reverse

    降順

  • options (Hash) —

    以下の通り

  Options Hash (options):

  • :event (String) —

    イベント名

  • :count_limit (Integer) —

    繰り返し回数(デフォルトは指定なし)

# File 'lib/when_exe/calendarnote.rb', line 651

def initialize(*args)
  if args[1].kind_of?(Range)
    parent, range, options = args
    first     = range.first
    last      = range.last
    direction = first < last ? :forward : :reverse
  else
    parent, first, direction, options = args
  end
  direction = options[:direction] if options[:direction]
  @parent = parent
  event   = options.delete(:event)
  case event
  when String ; void, @event, @parameter = event.split(/\A([^\d]+)/)
  else        ;       @event, @parameter = [parent.event, event]
  end
  @delta = @parent.send((@event+'_delta').to_sym, @parameter)
  instance_eval %Q{
    def event_eval(date)
      @parent.#{@event}(date, @parameter)
    end
  }
  date = event_eval(first)
  if direction == :reverse
    @delta = -@delta
    date   = event_eval(first + @delta) if first.to_i < date.to_i
  else
    date   = event_eval(first + @delta) if first.to_i > date.to_i
  end
  range ?
    super(@parent, range.exclude_end? ? date...last : date..last, options) :
    super(@parent, date, direction, options)
end

Instance Method Details

#_succ ⇒ When::TM::TemporalPosition

次のイベントを得る

Returns:

• (When::TM::TemporalPosition)

# File 'lib/when_exe/calendarnote.rb', line 626

def _succ
  @current = (@current==:first) ? @first : event_eval(@current + @delta)
end