Class: Locomotive::Liquid::Tags::Paginate

Inherits:
Liquid::Block
  • Object
show all
Defined in:
lib/locomotive/liquid/tags/paginate.rb

Overview

Paginate a collection

Usage:

paginate contents.projects by 5 %

 {% for project in paginate.collection %}
   {{ project.name }}
 {% endfor %}
{% endpaginate %}

Constant Summary collapse

Syntax = 
/(#{::Liquid::Expression}+)\s+by\s+([0-9]+)/

Instance Method Summary collapse

Constructor Details

#initialize(tag_name, markup, tokens, context) ⇒ Paginate

Returns a new instance of Paginate.



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# File 'lib/locomotive/liquid/tags/paginate.rb', line 22

def initialize(tag_name, markup, tokens, context)
  if markup =~ Syntax
    @collection_name = $1
    @per_page = $2.to_i
  else
    raise ::Liquid::SyntaxError.new("Syntax Error in 'paginate' - Valid syntax: paginate <collection> by <number>")
  end

  super
end

Instance Method Details

#render(context) ⇒ Object 



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# File 'lib/locomotive/liquid/tags/paginate.rb', line 33

def render(context)
  context.stack do
    collection = context[@collection_name]

    raise ::Liquid::ArgumentError.new("Cannot paginate array '#{@collection_name}'. Not found.") if collection.nil?

    if collection.is_a? Array
      pagination = Kaminari.paginate_array(collection).page(context['current_page']).per(@per_page).to_liquid.stringify_keys
    else
      pagination = collection.send(:paginate, {
        :page       => context['current_page'],
        :per_page   => @per_page
      }).to_liquid.stringify_keys
    end
    page_count, current_page = pagination['total_pages'], pagination['current_page']

    path = sanitize_path(context['fullpath'])

    pagination['previous'] = link(I18n.t('pagination.previous'), current_page - 1, path) if pagination['previous_page']
    pagination['next'] = link(I18n.t('pagination.next'), current_page + 1, path) if pagination['next_page']
    pagination['parts'] = []

    hellip_break = false

    if page_count > 1
      1.upto(page_count) do |page|
        if current_page == page
          pagination['parts'] << no_link(page)
        elsif page == 1
          pagination['parts'] << link(page, page, path)
        elsif page == page_count - 1
          pagination['parts'] << link(page, page, path)
        elsif page <= current_page - window_size or page >= current_page + window_size
          next if hellip_break
          pagination['parts'] << no_link('&hellip;')
          hellip_break = true
          next
        else
          pagination['parts'] << link(page, page, path)
        end

        hellip_break = false
      end
    end

    context['paginate'] = pagination

    render_all(@nodelist, context)
  end
end