mirror of
https://github.com/moparisthebest/www.moparscape.org
synced 2024-11-10 11:25:01 -05:00
122 lines
4.0 KiB
Ruby
122 lines
4.0 KiB
Ruby
module Jekyll
|
|
|
|
class Pagination < Generator
|
|
# This generator is safe from arbitrary code execution.
|
|
safe true
|
|
|
|
# Generate paginated pages if necessary.
|
|
#
|
|
# site - The Site.
|
|
#
|
|
# Returns nothing.
|
|
def generate(site)
|
|
site.pages.dup.each do |page|
|
|
paginate(site, page) if Pager.pagination_enabled?(site.config, page)
|
|
end
|
|
end
|
|
|
|
# Paginates the blog's posts. Renders the index.html file into paginated
|
|
# directories, e.g.: page2/index.html, page3/index.html, etc and adds more
|
|
# site-wide data.
|
|
#
|
|
# site - The Site.
|
|
# page - The index.html Page that requires pagination.
|
|
#
|
|
# {"paginator" => { "page" => <Number>,
|
|
# "per_page" => <Number>,
|
|
# "posts" => [<Post>],
|
|
# "total_posts" => <Number>,
|
|
# "total_pages" => <Number>,
|
|
# "previous_page" => <Number>,
|
|
# "next_page" => <Number> }}
|
|
def paginate(site, page)
|
|
all_posts = site.site_payload['site']['posts']
|
|
pages = Pager.calculate_pages(all_posts, site.config['paginate'].to_i)
|
|
page_dir = page.destination('').sub(/\/[^\/]+$/, '')
|
|
page_dir_config = site.config['pagination_dir']
|
|
dir = ((page_dir_config || page_dir) + '/').sub(/^\/+/, '')
|
|
|
|
(1..pages).each do |num_page|
|
|
pager = Pager.new(site.config, num_page, all_posts, page_dir+'/', '/'+dir, pages)
|
|
if num_page > 1
|
|
newpage = Page.new(site, site.source, page_dir, page.name)
|
|
newpage.pager = pager
|
|
newpage.dir = File.join(page.dir, "#{dir}page/#{num_page}")
|
|
site.pages << newpage
|
|
else
|
|
page.pager = pager
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
class Pager
|
|
attr_reader :page, :per_page, :posts, :total_posts, :total_pages, :previous_page, :next_page
|
|
|
|
# Calculate the number of pages.
|
|
#
|
|
# all_posts - The Array of all Posts.
|
|
# per_page - The Integer of entries per page.
|
|
#
|
|
# Returns the Integer number of pages.
|
|
def self.calculate_pages(all_posts, per_page)
|
|
(all_posts.size.to_f / per_page.to_i).ceil
|
|
end
|
|
|
|
# Determine if pagination is enabled for a given file.
|
|
#
|
|
# config - The configuration Hash.
|
|
# file - The String filename of the file.
|
|
#
|
|
# Returns true if pagination is enabled, false otherwise.
|
|
def self.pagination_enabled?(config, file)
|
|
file.name == 'index.html' && !config['paginate'].nil? && file.content =~ /paginator\./
|
|
end
|
|
|
|
# Initialize a new Pager.
|
|
#
|
|
# config - The Hash configuration of the site.
|
|
# page - The Integer page number.
|
|
# all_posts - The Array of all the site's Posts.
|
|
# num_pages - The Integer number of pages or nil if you'd like the number
|
|
# of pages calculated.
|
|
def initialize(config, page, all_posts, index_dir, pagination_dir, num_pages = nil)
|
|
@page = page
|
|
@per_page = config['paginate'].to_i
|
|
@page_dir = pagination_dir + 'page/'
|
|
@total_pages = num_pages || Pager.calculate_pages(all_posts, @per_page)
|
|
@previous_page = nil
|
|
|
|
if @page > @total_pages
|
|
raise RuntimeError, "page number can't be greater than total pages: #{@page} > #{@total_pages}"
|
|
end
|
|
|
|
init = (@page - 1) * @per_page
|
|
offset = (init + @per_page - 1) >= all_posts.size ? all_posts.size : (init + @per_page - 1)
|
|
|
|
@total_posts = all_posts.size
|
|
@posts = all_posts[init..offset]
|
|
@previous_page = @page != 1 ? @page_dir + (@page - 1).to_s + '/' : nil
|
|
@previous_page = index_dir if @page - 1 == 1
|
|
@next_page = @page != @total_pages ? @page_dir + (@page + 1).to_s + '/' : nil
|
|
end
|
|
|
|
# Convert this Pager's data to a Hash suitable for use by Liquid.
|
|
#
|
|
# Returns the Hash representation of this Pager.
|
|
def to_liquid
|
|
{
|
|
'page' => page,
|
|
'per_page' => per_page,
|
|
'posts' => posts,
|
|
'total_posts' => total_posts,
|
|
'total_pages' => total_pages,
|
|
'previous_page' => previous_page,
|
|
'next_page' => next_page
|
|
}
|
|
end
|
|
end
|
|
|
|
end
|
|
|