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module ActionView
module Helpers
# Provides methods for linking to ActionController::Pagination objects.
#
# You can also build your links manually, like in this example:
#
# <%= link_to "Previous page", { :page => paginator.current.previous } if paginator.current.previous %>
#
# <%= link_to "Next page", { :page => paginator.current.next } if paginator.current.next =%>
module PaginationHelper
unless const_defined?(:DEFAULT_OPTIONS)
DEFAULT_OPTIONS = {
:name => :page,
:window_size => 2,
:always_show_anchors => true,
:link_to_current_page => false,
:params => {}
}
end
# Creates a basic HTML link bar for the given +paginator+.
#
# +options+ are:
# <tt>:name</tt>:: the routing name for this paginator
# (defaults to +page+)
# <tt>:window_size</tt>:: the number of pages to show around
# the current page (defaults to +2+)
# <tt>:always_show_anchors</tt>:: whether or not the first and last
# pages should always be shown
# (defaults to +true+)
# <tt>:link_to_current_page</tt>:: whether or not the current page
# should be linked to (defaults to
# +false+)
# <tt>:params</tt>:: any additional routing parameters
# for page URLs
def pagination_links(paginator, options={})
options.merge!(DEFAULT_OPTIONS) {|key, old, new| old}
window_pages = paginator.current.window(options[:window_size]).pages
return if window_pages.length <= 1 unless
options[:link_to_current_page]
first, last = paginator.first, paginator.last
returning html = '' do
if options[:always_show_anchors] and not window_pages[0].first?
html << link_to(first.number, { options[:name] => first }.update( options[:params] ))
html << ' ... ' if window_pages[0].number - first.number > 1
html << ' '
end
window_pages.each do |page|
if paginator.current == page && !options[:link_to_current_page]
html << page.number.to_s
else
html << link_to(page.number, { options[:name] => page }.update( options[:params] ))
end
html << ' '
end
if options[:always_show_anchors] && !window_pages.last.last?
html << ' ... ' if last.number - window_pages[-1].number > 1
html << link_to(paginator.last.number, { options[:name] => last }.update( options[:params]))
end
end
end
end
end
end
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