middleman--middleman/lib/middleman/helpers.rb

module Middleman
  module Helpers
    def find_and_include_related_css_file
      path = request.path_info.dup
      path << "index.html" if path.match(%r{/$})
      path.gsub!(%r{^/}, '')
      path.gsub!(File.extname(path), '')
      path.gsub!('/', '-')

      sass_file = File.join(File.basename(self.class.views), "stylesheets", "#{path}.sass")
      if File.exists? sass_file
        stylesheet_link_tag "stylesheets/#{path}.css"
      end
    end

    def page_classes(*additional)
      path = request.path_info
      path << "index.html" if path.match(%r{/$})
      path.gsub!(%r{^/}, '')
  
      classes = []
      parts = path.split('.')[0].split('/')
      parts.each_with_index { |path, i| classes << parts.first(i+1).join('_') }

      classes << "index" if classes.empty?
      classes += additional unless additional.empty?
      classes.join(' ')
    end
    
    def link_to(title, url="#", params={})
      params.merge!(:href => url)
      params = params.map { |k,v| %Q{#{k}="#{v}"}}.join(' ')
      %Q{<a #{params}>#{title}</a>}
    end
    
    def asset_url(path)
      path.include?("://") ? path : "/#{path}"
    end

    def image_tag(path, options={})
      options[:alt] ||= ""
      params = options.merge(:src => asset_url(path))
      params = params.map { |k,v| %Q{#{k}="#{v}"}}.join(' ')
      "<img #{params} />"
    end

    def javascript_include_tag(path, options={})
      params = options.merge(:src => asset_url(path), :type => "text/javascript")
      params = params.map { |k,v| %Q{#{k}="#{v}"}}.join(' ')
      "<script #{params}></script>"
    end

    def stylesheet_link_tag(path, options={})
      options[:rel] ||= "stylesheet"
      params = options.merge(:href => asset_url(path), :type => "text/css")
      params = params.map { |k,v| %Q{#{k}="#{v}"}}.join(' ')
      "<link #{params} />"
    end
  end
end