312 lines
9.8 KiB
Ruby
312 lines
9.8 KiB
Ruby
# encoding: utf-8
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#
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# Redmine - project management software
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# Copyright (C) 2006-2013 Jean-Philippe Lang
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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module Redmine
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module Pagination
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class Paginator
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attr_reader :item_count, :per_page, :page, :page_param
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def initialize(*args)
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if args.first.is_a?(ActionController::Base)
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args.shift
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ActiveSupport::Deprecation.warn "Paginator no longer takes a controller instance as the first argument. Remove it from #new arguments."
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end
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item_count, per_page, page, page_param = *args
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@item_count = item_count
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@per_page = per_page
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page = (page || 1).to_i
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if page < 1
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page = 1
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end
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@page = page
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@page_param = page_param || :page
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end
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def offset
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(page - 1) * per_page
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end
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## fq
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def reverse_offset
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offset = @item_count-@per_page*page
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if offset < 0
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offset = 0
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end
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offset
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end
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## end
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def first_page
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if item_count > 0
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1
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end
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end
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def previous_page
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if page > 1
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page - 1
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end
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end
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def next_page
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if last_item < item_count
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page + 1
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end
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end
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def last_page
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if item_count > 0
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(item_count - 1) / per_page + 1
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end
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end
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def first_item
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item_count == 0 ? 0 : (offset + 1)
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end
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def last_item
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l = first_item + per_page - 1
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l > item_count ? item_count : l
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end
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def linked_pages
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pages = []
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if item_count > 0
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pages += [first_page, page, last_page]
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pages += ((page-2)..(page+2)).to_a.select {|p| p > first_page && p < last_page}
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end
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pages = pages.compact.uniq.sort
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if pages.size > 1
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pages
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else
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[]
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end
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end
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def items_per_page
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ActiveSupport::Deprecation.warn "Paginator#items_per_page will be removed. Use #per_page instead."
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per_page
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end
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def current
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ActiveSupport::Deprecation.warn "Paginator#current will be removed. Use .offset instead of .current.offset."
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self
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end
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end
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# Paginates the given scope or model. Returns a Paginator instance and
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# the collection of objects for the current page.
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#
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# Options:
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# :parameter name of the page parameter
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#
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# Examples:
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# @user_pages, @users = paginate User.where(:status => 1)
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#
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def paginate(scope, options={})
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options = options.dup
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finder_options = options.extract!(
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:conditions,
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:order,
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:joins,
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:include,
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:select
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)
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if scope.is_a?(Symbol) || finder_options.values.compact.any?
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return deprecated_paginate(scope, finder_options, options)
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end
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paginator = paginator(scope.count, options)
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collection = scope.limit(paginator.per_page).offset(paginator.offset).to_a
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return paginator, collection
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end
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def deprecated_paginate(arg, finder_options, options={})
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ActiveSupport::Deprecation.warn "#paginate with a Symbol and/or find options is depreceted and will be removed. Use a scope instead."
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klass = arg.is_a?(Symbol) ? arg.to_s.classify.constantize : arg
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scope = klass.scoped(finder_options)
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paginate(scope, options)
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end
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def paginator(item_count, options={})
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options.assert_valid_keys :parameter, :per_page
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page_param = options[:parameter] || :page
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page = (params[page_param] || 1).to_i
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per_page = options[:per_page] || per_page_option
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Paginator.new(item_count, per_page, page, page_param)
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end
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module Helper
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include Redmine::I18n
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# Renders the pagination links for the given paginator.
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#
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# Options:
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# :per_page_links if set to false, the "Per page" links are not rendered
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#
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def pagination_links_full(*args)
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pagination_links_each(*args) do |text, parameters, options|
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if block_given?
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yield text, parameters, options
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else
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link_to text, params.merge(parameters), options
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end
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end
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end
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# Yields the given block with the text and parameters
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# for each pagination link and returns a string that represents the links
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# def pagination_links_each(paginator, count=nil, options={}, &block)
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# options.assert_valid_keys :per_page_links
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#
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# per_page_links = options.delete(:per_page_links)
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# per_page_links = false if count.nil?
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# page_param = paginator.page_param
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#
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# html = ''
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# if paginator.previous_page
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# # \xc2\xab(utf-8) = «
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# text = "\xc2\xab " + l(:label_previous)
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# html << yield(text, {page_param => paginator.previous_page}, :class => 'previous') + ' '
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# end
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#
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# previous = nil
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# paginator.linked_pages.each do |page|
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# if previous && previous != page - 1
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# html << content_tag('span', '...', :class => 'spacer') + ' '
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# end
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# if page == paginator.page
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# html << content_tag('span', page.to_s, :class => 'current page')
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# else
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# html << yield(page.to_s, {page_param => page}, :class => 'page')
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# end
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# html << ' '
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# previous = page
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# end
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#
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# if paginator.next_page
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# # \xc2\xbb(utf-8) = »
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# text = l(:label_next) + " \xc2\xbb"
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# html << yield(text, {page_param => paginator.next_page}, :class => 'next') + ' '
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# end
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#
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# html << content_tag('span', "(#{paginator.first_item}-#{paginator.last_item}/#{paginator.item_count})", :class => 'items') + ' '
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#
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# if per_page_links != false && links = per_page_links(paginator, &block)
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# html << content_tag('span', links.to_s, :class => 'per-page')
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# end
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#
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# html.html_safe
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# end
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#Added by Nie guanghui
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#Designed for pagination.
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def pagination_links_each(paginator, count=nil, options={}, &block)
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options.assert_valid_keys :per_page_links
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per_page_links = options.delete(:per_page_links)
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per_page_links = false if count.nil?
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page_param = paginator.page_param
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html = ''
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if paginator.previous_page
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# \xc2\xab(utf-8) = «
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text = "\xc2\xab " + l(:label_previous)
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html << '<li>' << yield(text, {page_param => paginator.previous_page}, :class => 'previous') << '</li>' + ' '
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end
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unless paginator.previous_page
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if paginator.next_page
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text = "\xc2\xab " + l(:label_previous)
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html << '<li>' << yield(text, {page_param => paginator.previous_page}, :class => 'previous') << '</li>' + ' '
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end
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end
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previous = nil
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paginator.linked_pages.each do |page|
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if previous && previous != page - 1
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html << '<li>' << content_tag('span', '...', :class => 'spacer') << '</li>' + ' '
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end
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if page == paginator.page
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html << '<li>' << content_tag('span', page.to_s, :class => 'current-page') << '</li>'
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else
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html << '<li>' << yield(page.to_s, {page_param => page}, :class => 'page') << '</li>'
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end
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html << ' '
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previous = page
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end
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if paginator.next_page
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# \xc2\xbb(utf-8) = »
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text = l(:label_next) + " \xc2\xbb"
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html << '<li>' << yield(text, {page_param => paginator.next_page}, :class => 'next') << '</li>' + ' '
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end
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unless paginator.next_page
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if paginator.previous_page
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# \xc2\xbb(utf-8) = »
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text = l(:label_front) + " \xc2\xbb"
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html << "<li>" << yield(text, {page_param => paginator.next_page}, :class => 'next') << "</li>" + ' '
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end
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end
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# html << content_tag('span', "(#{paginator.first_item}-#{paginator.last_item}/#{paginator.item_count})", :class => 'items') + ' '
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#
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# if per_page_links != false && links = per_page_links(paginator, &block)
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# html << content_tag('span', links.to_s, :class => 'per-page')
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# end
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html.html_safe
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end
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# Renders the "Per page" links.
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def per_page_links(paginator, &block)
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values = per_page_options(paginator.per_page, paginator.item_count)
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if values.any?
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links = values.collect do |n|
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if n == paginator.per_page
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content_tag('span', n.to_s)
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else
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yield(n, :per_page => n, paginator.page_param => nil)
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end
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end
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l(:label_display_per_page, links.join(', ')).html_safe
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end
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end
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def per_page_options(selected=nil, item_count=nil)
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options = Setting.per_page_options_array
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if item_count && options.any?
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if item_count > options.first
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max = options.detect {|value| value >= item_count} || item_count
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else
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max = item_count
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end
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options = options.select {|value| value <= max || value == selected}
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end
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if options.empty? || (options.size == 1 && options.first == selected)
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[]
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else
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options
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end
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end
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end
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end
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end
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