link_to_block in Rails?

Ever since Seaside was featured in Ruby On Rails podcast, I was wondering if there’s any use for having a link_to_block method…

    <% variable = Time.now %>
  <%= link_to_block("Click me to execute a block of code") do |c|
            c.render(:text => "Time.now = \"#{Time.now}\"<br />variable = \"#{variable}\"")
  end %>  

I guess the only way to find out is to have it available first…

    # paste everything into app/controllers/application.rb
  # to empower all your controllers
 
  # all links generated by 'link_to_block' goes here
  def continued
    # should probably use Drb Hash object instead of global variable $PROCHASH
    if $PROCHASH and $PROCHASH[@session.session_id] and
       (block = $PROCHASH[@session.session_id][params[:id]]) and
       block.respond_to?(:call)       
      block.call(self)      
    else
      raise "No block to continue for '#{params[:id]}'"
    end
  end

  # similar to 'link_to', but accepts a block of code instead of URL/HTTP options
  # when clicked, the block is executed
  def link_to_block(text, &block)
    # should probably use Drb Hash object instead of global variable $PROCHASH
    $PROCHASH ||= Hash.new(:created_at => Time.now)
    action_name = text.to_sym.to_s
    $PROCHASH[@session.session_id] ||= Hash.new
    $PROCHASH[@session.session_id].merge!({
      action_name => Proc.new(&block),
    })
    # we do have to remember to house-keep this hash... someday
    url = url_for(:action => 'continued', :id => action_name)
    "<a xhref=\"#{url}\">#{CGI.escapeHTML(text)}</a>"
  end
 
  # makes it accessible within views (e.g. rhtml)
  helper_method :link_to_block  

An example of clicking a link_to_block and seeing the variable in the block…

link_to_block