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let the paginator loop through only "relevant" pages by default

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This commit is contained in:
Akira Matsuda 2011-12-11 23:12:55 +09:00
parent a54c3ce466
commit 0ffe09de68
1 changed files with 15 additions and 33 deletions
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48
lib/kaminari/helpers/paginator.rb
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@ -11,31 +11,6 @@ module Kaminari
# so that this instance can actually "render"
include ::ActionView::Context
module Windows
def relevant_pages options
[left_window(options), inside_window(options), right_window(options)].map(&:to_a).flatten.uniq.sort.reject { |x| x < 1 or x > options[:num_pages] }
end
def all_pages options
1.upto(options[:num_pages])
end
protected
def left_window options
1.upto(options[:left] + 1)
end
def right_window options
(options[:num_pages] - options[:right]).upto(options[:num_pages])
end
def inside_window options
(options[:current_page] - options[:window]).upto(options[:current_page] + options[:window])
end
end
include Windows
def initialize(template, options) #:nodoc:
@window_options = {}.tap do |h|
h[:window] = options.delete(:window) || options.delete(:inner_window) || Kaminari.config.window
@ -59,14 +34,11 @@ module Kaminari
end
# enumerate each page providing PageProxy object as the block parameter
def each_page
return to_enum(:each_page) unless block_given?
1.upto(@options[:num_pages]) do |i|
yield PageProxy.new(@window_options.merge(@options), i, @last)
end
end
# Because of performance reason, this doesn't actually enumerate all pages but pages that are seemingly relevant to the paginator.
# "Relevant" pages are:
# * pages inside the left outer window plus one for showing the gap tag
# * pages inside the inner window plus one on the left plus one on the right for showing the gap tags
# * pages inside the right outer window plus one for showing the gap tag
def each_relevant_page
return to_enum(:each_relevant_page) unless block_given?
@ -74,6 +46,16 @@ module Kaminari
yield PageProxy.new(@window_options.merge(@options), i, @last)
end
end
alias each_page each_relevant_page
def relevant_pages(options)
left_window_plus_one = 1.upto(options[:left] + 1).to_a
right_window_plus_one = (options[:num_pages] - options[:right]).upto(options[:num_pages]).to_a
inside_window_plus_each_sides = (options[:current_page] - options[:window] - 1).upto(options[:current_page] + options[:window] + 1).to_a
(left_window_plus_one + inside_window_plus_each_sides + right_window_plus_one).uniq.sort.reject {|x| (x < 1) || (x > options[:num_pages])}
end
private :relevant_pages
def page_tag(page)
@last = Page.new @template, @options.merge(:page => page)