Class: Paginate

Inherits:
Liquid::Block show all
Defined in:
lib/generators/liquid_cms/templates/vendor/plugins/liquid/performance/shopify/paginate.rb

Constant Summary collapse

Syntax = 
/(#{Liquid::QuotedFragment})\s*(by\s*(\d+))?/

Constants inherited from Liquid::Block

Liquid::Block::ContentOfVariable, Liquid::Block::FullToken, Liquid::Block::IsTag, Liquid::Block::IsVariable

Instance Attribute Summary

Attributes inherited from Liquid::Tag

#nodelist

Instance Method Summary collapse

Methods inherited from Liquid::Block

#block_delimiter, #block_name, #create_variable, #end_tag, #parse, #unknown_tag

Methods inherited from Liquid::Tag

#name, #parse

Constructor Details

#initialize(tag_name, markup, tokens) ⇒ Paginate 



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# File 'lib/generators/liquid_cms/templates/vendor/plugins/liquid/performance/shopify/paginate.rb', line 4

def initialize(tag_name, markup, tokens)
  @nodelist = []
  
  if markup =~ Syntax
    @collection_name = $1
    @page_size = if $2
      $3.to_i
    else
      20
    end
    
    @attributes = { 'window_size' => 3 }
    markup.scan(Liquid::TagAttributes) do |key, value|
      @attributes[key] = value
    end        
  else
    raise SyntaxError.new("Syntax Error in tag 'paginate' - Valid syntax: paginate [collection] by number")
  end

  super
end

Instance Method Details

#render(context) ⇒ Object 



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# File 'lib/generators/liquid_cms/templates/vendor/plugins/liquid/performance/shopify/paginate.rb', line 26

def render(context)
  @context = context

  context.stack do                      
    current_page  = context['current_page'].to_i

    pagination = {
      'page_size'      => @page_size,
      'current_page'   => 5,
      'current_offset' => @page_size * 5
    }
    
    context['paginate'] = pagination      
    
    collection_size  = context[@collection_name].size      

    raise ArgumentError.new("Cannot paginate array '#{@collection_name}'. Not found.") if collection_size.nil?
  
    page_count = (collection_size.to_f / @page_size.to_f).to_f.ceil + 1 

    pagination['items']      = collection_size
    pagination['pages']      = page_count -1
    pagination['previous']   = link('« Previous', current_page-1 )  unless 1 >= current_page
    pagination['next']       = link('Next &raquo;', current_page+1 )      unless page_count <= current_page+1
    pagination['parts']      = []
    
    hellip_break = false
    
    if page_count > 2
      1.upto(page_count-1) do |page|          
      
        if current_page == page
          pagination['parts'] << no_link(page)        
        elsif page == 1 
          pagination['parts'] << link(page, page)
        elsif page == page_count -1
          pagination['parts'] << link(page, page)
        elsif page <= current_page - @attributes['window_size'] or page >= current_page + @attributes['window_size']
          next if hellip_break
          pagination['parts'] << no_link('&hellip;') 
          hellip_break = true
          next
        else
          pagination['parts'] << link(page, page)
        end
      
        hellip_break = false
      end 
    end
    
    render_all(@nodelist, context)      
  end
end