gistfile1.js

var proc_rep = ["define",{"name":"foo"},[["sequence",{},[["participant",{"activity":"Foo","ref":"nada"},[]]]]]];
4 FluoCan.renderFlow( 'fluo', proc_rep, { 'workitems' : ['0_0_0'] } );
5 FluoCan.crop('fluo'); 

gistfile2.rb

def process_tree( object )
      case object
      when Ruote::Workitem
        process = engine.process( object.fei.wfid )
        process.current_tree.to_json
      end
    end

gistfile3.txt

:javascript
  var proc_rep = #{process_tree( @workitem )};
  FluoCan.renderFlow( 'fluo', proc_rep, { 'workitems' : ['#{@workitem.fei.expid}'] } );
  FluoCan.crop('fluo');