Class: DataMapper::Paginator::ControlHelper::Elastic

Inherits:
Sliding
  • Object
show all
Includes:
DataMapper::Paginator::ControlHelperAbstract
Defined in:
lib/dm-paginator/control/elastic.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from DataMapper::Paginator::ControlHelperAbstract

#normalize_page_number, #pages_in_range

Constructor Details

#initialize(paginator, options = {}) ⇒ Elastic

Returns a new instance of Elastic.



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# File 'lib/dm-paginator/control/elastic.rb', line 9

def initialize paginator, options = {}
  if !paginator.is_a?( Main )
    raise ArgumentError, "paginator argument is not an instance of Main"
  end

  @paginator = paginator
  @options = options
  @options[:page_range] = options[:page_range].to_i || DataMapper::Paginator::default[:page_range]
end

Instance Attribute Details

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/dm-paginator/control/elastic.rb', line 7

def options
  @options
end

#paginator ⇒ Object (readonly)

Returns the value of attribute paginator.



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# File 'lib/dm-paginator/control/elastic.rb', line 7

def paginator
  @paginator
end

Instance Method Details

#pages(page_range = nil) ⇒ Object 



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# File 'lib/dm-paginator/control/elastic.rb', line 19

def pages page_range = nil
  return unless paginator.page_count > 0

  page_range = options[:page_range] || page_range
  page_number = normalize_page_number paginator.page
  original_page_range = page_range
  page_range = page_range * 2 - 1

  if original_page_range + page_number - 1 < page_range
    page_range = original_page_range + page_number -1
  elsif original_page_range + page_number - 1 > paginator.count
    page_range = original_page_range + paginator.count - page_number
  end

  return super( page_range )
end