Module: Skyline::Rendering::Helpers::BreadCrumbHelper

Included in:
Renderer::Helpers
Defined in:
lib/skyline/rendering/helpers/bread_crumb_helper.rb

Instance Method Summary collapse

Instance Method Details

Helper to easily create breadcrumbs that are cut off in the middle.

Parameters:

  • bc (Array<Array>) —

    An array of arrays with two elements: [[title,url],…]

  • options (Hash) (defaults to: {}) —

    Options

Options Hash (options):

  • :max_length (Integer) —

    () Limit the max length in chars. Returns an array with nil element where something has been cut away.

Returns:

  • (Array<Array>) —

    Array of arrays with the first element the title and as second element the url.



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# File 'lib/skyline/rendering/helpers/bread_crumb_helper.rb', line 12

def bread_crumb(bc,options={})
  if bc.kind_of? Skyline::ArticleVersion
    page = bc
    bc = bc.page.nesting.map{|p| [p.published_publication_data.andand.navigation_title,p.url]}
    bc[-1][0] = page.data.navigation_title
  end
  
  if options[:max_length] && bc.size > 1
    # always display the last page
    b = [bc.pop]
    length = b[-1][0].size
          
    # then try to 'add' the first page if it fits
    first = nil
    if length + bc[0][0].to_s.size <= options[:max_length]
      first = bc.shift
      length += first[0].to_s.size
    end
    
    # try to add pages in between starting from the 2nd to last page and going back as long as it fits
    bc.reverse.each do |p|
      if length + p[0].to_s.size <= options[:max_length]
        b.unshift(p)
        length += p[0].to_s.size
      else
        b.unshift(nil)
        break
      end
    end
    
    b.unshift(first) if first
    b
  else
    bc
  end    
end