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21ad994d42
Sometimes, we want to make an array just paginatable without changing its elements. Make it so if total count is explicitly given and it is greater than the length of the given array. #516
66 lines
2.1 KiB
Ruby
66 lines
2.1 KiB
Ruby
require 'active_support/core_ext/module'
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module Kaminari
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# Kind of Array that can paginate
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class PaginatableArray < Array
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include Kaminari::ConfigurationMethods::ClassMethods
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attr_internal_accessor :limit_value, :offset_value
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# ==== Options
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# * <tt>:limit</tt> - limit
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# * <tt>:offset</tt> - offset
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# * <tt>:total_count</tt> - total_count
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def initialize(original_array = [], options = {})
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@_original_array, @_limit_value, @_offset_value, @_total_count, @_padding = original_array, (options[:limit] || default_per_page).to_i, options[:offset].to_i, options[:total_count], options[:padding].to_i
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if options[:limit] && options[:offset]
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extend Kaminari::PageScopeMethods
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end
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if @_total_count.present? && @_total_count <= original_array.count
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original_array = original_array.first(@_total_count)[@_offset_value, @_limit_value]
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end
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if @_total_count.nil?
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original_array = original_array[@_offset_value, @_limit_value]
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end
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super(original_array || [])
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end
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def entry_name
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"entry"
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end
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# items at the specified "page"
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class_eval <<-RUBY, __FILE__, __LINE__ + 1
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def #{Kaminari.config.page_method_name}(num = 1)
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offset(limit_value * ([num.to_i, 1].max - 1))
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end
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RUBY
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# returns another chunk of the original array
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def limit(num)
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self.class.new @_original_array, :limit => num, :offset => @_offset_value, :total_count => @_total_count, :padding => @_padding
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end
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# total item numbers of the original array
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def total_count
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@_total_count || @_original_array.count
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end
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# returns another chunk of the original array
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def offset(num)
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self.class.new @_original_array, :limit => @_limit_value, :offset => num, :total_count => @_total_count, :padding => @_padding
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end
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end
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# Wrap an Array object to make it paginatable
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# ==== Options
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# * <tt>:limit</tt> - limit
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# * <tt>:offset</tt> - offset
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# * <tt>:total_count</tt> - total_count
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def self.paginate_array(array, options = {})
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PaginatableArray.new array, options
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end
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end
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