lib/locmare/list_group/lib/pager.rb

   1 module Locmare
   2   module ListGroupModule
   3     module LibModule
   4       module Pager
   5         class Default
   6
   7           attr :page_status, :options, :window_size,
   8             :total, :current_page, :per_page, :total_page,
   9             :template_dir, :template_name
  10
  11           def initialize page_status, options
  12             @page_status = page_status
  13             @options = options
  14             @total = @page_status.total
  15             @current_page = @page_status.page
  16             @per_page = @page_status.limit
  17             @total_page = @page_status.total_page
  18             @window_size = 3
  19             @template_dir = 'templates/r/pager/'
  20             @template_name = @template_dir + 'default'
  21             @controller = Manifest.manifest.controllers[@options['controller'].to_s]
  22             @action = @controller.actions[@options['action'].to_s]
  23           end
  24
  25           def range
  26             f = if self.has_previous_page_gap
  27               @current_page - @window_size
  28             else
  29               1
  30             end
  31             t = if self.has_next_page_gap
  32               @current_page + @window_size
  33             else
  34               @total_page
  35             end
  36             f..t
  37           end
  38
  39           def has_previous_page
  40             @current_page > 1
  41           end
  42
  43           def has_next_page
  44             @current_page < @total_page
  45           end
  46
  47           def has_previous_page_gap
  48             @current_page > @window_size + 1
  49           end
  50
  51           def has_next_page_gap
  52             @total_page - @current_page > @window_size
  53           end
  54
  55           def url page
  56             params = {}
  57             @options.each do |k, v|  # deep copy
  58               params[k] = v
  59             end
  60             params['page'] = page
  61             params['page_size'] = @per_page
  62             @action.url params
  63           end
  64
  65         end
  66       end
  67
  68     end
  69   end
  70 end