Class: Jekyll::J1Paginator::Generator::Paginator

Inherits:
Object
  • Object
show all
Defined in:
lib/j1-paginator/generator/paginator.rb

Overview

Handles the preparation of all the posts based on the current page index

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(config_per_page, first_index_page_url, paginated_page_url, posts, cur_page_nr, num_pages, default_indexpage, default_ext) ⇒ Paginator

Initialize a new Paginator.



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# File 'lib/j1-paginator/generator/paginator.rb', line 15

def initialize(config_per_page, first_index_page_url, paginated_page_url, posts, cur_page_nr, num_pages, default_indexpage, default_ext)
  @page = cur_page_nr
  @per_page = config_per_page.to_i
  @total_pages = num_pages

  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) >= posts.size ? posts.size : (init + @per_page - 1)

  # Ensure that the current page has correct extensions if needed
  this_page_url = Utils.ensure_full_path(@page == 1 ? first_index_page_url : paginated_page_url,
                                         !default_indexpage || default_indexpage.length == 0 ? 'index' : default_indexpage,
                                         !default_ext || default_ext.length == 0 ? '.html' : default_ext)
  
  # To support customizable pagination pages we attempt to explicitly
  # append the page name to the url incase the user is using extensionless
  # permalinks.
  if default_indexpage && default_indexpage.length > 0
    # Adjust first page url
    first_index_page_url = Utils.ensure_full_path(first_index_page_url, default_indexpage, default_ext)
    # Adjust the paginated pages as well
    paginated_page_url = Utils.ensure_full_path(paginated_page_url, default_indexpage, default_ext)
  end        

  @total_posts = posts.size
  @posts = posts[init..offset]
  @page_path = Utils.format_page_number(this_page_url, cur_page_nr, @total_pages)

  @previous_page = @page != 1 ? @page - 1 : nil
  @previous_page_path = @page == 1 ? nil : 
                        @page == 2 ? Utils.format_page_number(first_index_page_url, 1, @total_pages) : 
                        Utils.format_page_number(paginated_page_url, @previous_page, @total_pages)
  @next_page = @page != @total_pages ? @page + 1 : nil
  @next_page_path = @page != @total_pages ? Utils.format_page_number(paginated_page_url, @next_page, @total_pages) : nil

  @first_page = 1
  @first_page_path = Utils.format_page_number(first_index_page_url, 1, @total_pages)
  @last_page = @total_pages
  @last_page_path = Utils.format_page_number(paginated_page_url, @total_pages, @total_pages)
end

Instance Attribute Details

#first_page ⇒ Object (readonly)

Returns the value of attribute first_page.



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# File 'lib/j1-paginator/generator/paginator.rb', line 6

def first_page
  @first_page
end

#first_page_path ⇒ Object (readonly)

Returns the value of attribute first_page_path.



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# File 'lib/j1-paginator/generator/paginator.rb', line 6

def first_page_path
  @first_page_path
end

#last_page ⇒ Object (readonly)

Returns the value of attribute last_page.



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# File 'lib/j1-paginator/generator/paginator.rb', line 6

def last_page
  @last_page
end

#last_page_path ⇒ Object (readonly)

Returns the value of attribute last_page_path.



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# File 'lib/j1-paginator/generator/paginator.rb', line 6

def last_page_path
  @last_page_path
end

#next_page ⇒ Object (readonly)

Returns the value of attribute next_page.



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# File 'lib/j1-paginator/generator/paginator.rb', line 6

def next_page
  @next_page
end

#next_page_path ⇒ Object (readonly)

Returns the value of attribute next_page_path.



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# File 'lib/j1-paginator/generator/paginator.rb', line 6

def next_page_path
  @next_page_path
end

#page ⇒ Object (readonly)

Returns the value of attribute page.



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# File 'lib/j1-paginator/generator/paginator.rb', line 6

def page
  @page
end

#page_path ⇒ Object (readonly)

Returns the value of attribute page_path.



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# File 'lib/j1-paginator/generator/paginator.rb', line 6

def page_path
  @page_path
end

#page_trail ⇒ Object

Returns the value of attribute page_trail.



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# File 'lib/j1-paginator/generator/paginator.rb', line 6

def page_trail
  @page_trail
end

#per_page ⇒ Object (readonly)

Returns the value of attribute per_page.



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# File 'lib/j1-paginator/generator/paginator.rb', line 6

def per_page
  @per_page
end

#posts ⇒ Object (readonly)

Returns the value of attribute posts.



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# File 'lib/j1-paginator/generator/paginator.rb', line 6

def posts
  @posts
end

#previous_page ⇒ Object (readonly)

Returns the value of attribute previous_page.



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# File 'lib/j1-paginator/generator/paginator.rb', line 6

def previous_page
  @previous_page
end

#previous_page_path ⇒ Object (readonly)

Returns the value of attribute previous_page_path.



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# File 'lib/j1-paginator/generator/paginator.rb', line 6

def previous_page_path
  @previous_page_path
end

#total_pages ⇒ Object (readonly)

Returns the value of attribute total_pages.



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# File 'lib/j1-paginator/generator/paginator.rb', line 6

def total_pages
  @total_pages
end

#total_posts ⇒ Object (readonly)

Returns the value of attribute total_posts.



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# File 'lib/j1-paginator/generator/paginator.rb', line 6

def total_posts
  @total_posts
end

Instance Method Details

#to_liquid ⇒ Object

Convert this Paginator’s data to a Hash suitable for use by Liquid. Returns the Hash representation of this Paginator.



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# File 'lib/j1-paginator/generator/paginator.rb', line 61

def to_liquid
  {
    'per_page' => per_page,
    'posts' => posts,
    'total_posts' => total_posts,
    'total_pages' => total_pages,
    'page' => page,
    'page_path' => page_path,
    'previous_page' => previous_page,
    'previous_page_path' => previous_page_path,
    'next_page' => next_page,
    'next_page_path' => next_page_path,
    'first_page' => first_page,
    'first_page_path' => first_page_path,
    'last_page' => last_page,
    'last_page_path' => last_page_path,
    'page_trail' => page_trail
  }
end