nicojensen.de/vendor/bundle/gems/jekyll-paginate-1.1.0/lib/jekyll-paginate/pager.rb
Nico Jensen b59a203dbb Init
Init commit
2019-03-12 13:49:49 +01:00

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Ruby

module Jekyll
module Paginate
class Pager
attr_reader :page, :per_page, :posts, :total_posts, :total_pages,
:previous_page, :previous_page_path, :next_page, :next_page_path
# 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 the site.
#
# site - the Jekyll::Site object
#
# Returns true if pagination is enabled, false otherwise.
def self.pagination_enabled?(site)
!site.config['paginate'].nil? &&
site.pages.size > 0
end
# Static: Determine if a page is a possible candidate to be a template page.
# Page's name must be `index.html` and exist in any of the directories
# between the site source and `paginate_path`.
#
# config - the site configuration hash
# page - the Jekyll::Page about which we're inquiring
#
# Returns true if the
def self.pagination_candidate?(config, page)
page_dir = File.dirname(File.expand_path(remove_leading_slash(page.path), config['source']))
paginate_path = remove_leading_slash(config['paginate_path'])
paginate_path = File.expand_path(paginate_path, config['source'])
page.name == 'index.html' &&
in_hierarchy(config['source'], page_dir, File.dirname(paginate_path))
end
# Determine if the subdirectories of the two paths are the same relative to source
#
# source - the site source
# page_dir - the directory of the Jekyll::Page
# paginate_path - the absolute paginate path (from root of FS)
#
# Returns whether the subdirectories are the same relative to source
def self.in_hierarchy(source, page_dir, paginate_path)
return false if paginate_path == File.dirname(paginate_path)
return false if paginate_path == Pathname.new(source).parent
page_dir == paginate_path ||
in_hierarchy(source, page_dir, File.dirname(paginate_path))
end
# Static: Return the pagination path of the page
#
# site - the Jekyll::Site object
# num_page - the pagination page number
#
# Returns the pagination path as a string
def self.paginate_path(site, num_page)
return nil if num_page.nil?
return Pagination.first_page_url(site) if num_page <= 1
format = site.config['paginate_path']
format = format.sub(':num', num_page.to_s)
ensure_leading_slash(format)
end
# Static: Return a String version of the input which has a leading slash.
# If the input already has a forward slash in position zero, it will be
# returned unchanged.
#
# path - a String path
#
# Returns the path with a leading slash
def self.ensure_leading_slash(path)
path[0..0] == "/" ? path : "/#{path}"
end
# Static: Return a String version of the input without a leading slash.
#
# path - a String path
#
# Returns the input without the leading slash
def self.remove_leading_slash(path)
ensure_leading_slash(path)[1..-1]
end
# Initialize a new Pager.
#
# site - the Jekyll::Site object
# 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(site, page, all_posts, num_pages = nil)
@page = page
@per_page = site.config['paginate'].to_i
@total_pages = num_pages || Pager.calculate_pages(all_posts, @per_page)
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 - 1 : nil
@previous_page_path = Pager.paginate_path(site, @previous_page)
@next_page = @page != @total_pages ? @page + 1 : nil
@next_page_path = Pager.paginate_path(site, @next_page)
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,
'previous_page_path' => previous_page_path,
'next_page' => next_page,
'next_page_path' => next_page_path
}
end
end
end
end