OpenProject is the leading open source project management software.
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openproject/app/helpers/pagination_helper.rb

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#-- encoding: UTF-8
#-- copyright
# OpenProject is a project management system.
#
# Copyright (C) 2012-2013 the OpenProject Team
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License version 3.
#
# See doc/COPYRIGHT.rdoc for more details.
#++
require 'will_paginate'
module PaginationHelper
def pagination_links_full(paginator, options = {})
merged_options = { next_label: I18n.t(:label_next),
previous_label: I18n.t(:label_previous),
container: true }.merge(options)
html = ''.html_safe
if paginator.total_entries > 0
html << will_paginate(paginator, merged_options.merge({ :container => false }) )
html << content_tag(:span, "(#{paginator.offset + 1} - #{paginator.offset + paginator.length}/#{paginator.total_entries})", :class => 'range')
if per_page_links && links = per_page_links(paginator.per_page, merged_options[:params] || params)
html << links
end
end
merged_options[:container] ?
content_tag(:p, html, :class => "pagination") :
html
end
def per_page_links(selected=nil, options = params)
links = Setting.per_page_options_array.collect do |n|
n == selected ?
content_tag(:span, n, :class => 'current') :
link_to_content_update(n, options.merge(:page => 1, :per_page => n))
end
content_tag :span, :class => 'per_page_options' do
links.size > 1 ? l(:label_display_per_page, links.join(', ')).html_safe : nil
end
end
# Returns page option used for pagination
# based on:
# * offset
# * limit
# * page
# parameters.
# Preferes page over the other two and
# calculates page in it's absence based on limit and offset.
# Return 1 if all else fails.
def page_param(options = params)
page = if options[:page]
options[:page].to_i
elsif options[:offset] && options[:limit]
begin
# + 1 as page is not 0 but 1 based
options[:offset].to_i/per_page_param(options) + 1
rescue ZeroDivisionError
1
end
else
1
end
page > 0 ?
page :
1
end
# Returns per_page option used for pagination
# based on:
# * per_page session value
# * per_page options value
# * limit options value
# in that order
# Return smallest possible setting if all else fails.
def per_page_param(options = params)
per_page_candidates = [options[:per_page].to_i, session[:per_page].to_i, options[:limit].to_i]
unless (union = per_page_candidates & Setting.per_page_options_array).empty?
session[:per_page] = union.first
union.first
else
Setting.per_page_options_array.sort.first
end
end
end