paste_node_inserting_before

# File ext/json/lib/json/editor.rb, line 359
      def paste_node_inserting_before(item)
        if current = selection.selected
          if @clipboard_data
            parent = current.parent or return
            parent_type = parent.type
            if parent_type == 'Array'
              selected_index = parent.each_with_index do |c, i|
                break i if c == current
              end
              Editor.data2model(@clipboard_data, model, parent) do |m|
                m.insert_before(parent, current)
              end
              expand_collapse(current)
              toplevel.display_status("Inserted an element to " +
                "'#{parent_type}' before index #{selected_index}.")
              window.change
            else
              toplevel.display_status(
                "Cannot insert node below '#{parent_type}'!")
            end
          else
            toplevel.display_status("Nothing to paste in clipboard!")
          end
        else
            toplevel.display_status("Append a node into the root first!")
        end
      end