document versions

app/controllers/documents_controller.rb

@@ -67,9 +67,17 @@ class DocumentsController < ApplicationController
   end
   def write
     @document = Document.find(params[:id])
-    if @document.is_etherpad? 
+    if @document.is_etherpad? && params[:versionid].nil?
       redirect_to action: :write_etherpad
     else
+      unless params[:versionid].nil?
+        v=@document.versions.find(params[:versionid])
+        if v.reify.nil?
+          v=v.next
+        end
+        @document=v.reify
+       
+      end
       @parent=@document.parent
       respond_to do |format|
         format.html

app/views/documents/show.html.erb

@@ -7,3 +7,11 @@
 <%= raw(@document.text) %>
 </div>
 
+<% if can?(:edit, @document) %>
+<ul class='breadcrumb'>
+<% @document.versions.each do |v| %>
+<li>
+<%= link_to User.find(v.whodunnit).name+": "+ v.event + " (" +  I18n.l(v.created_at)+ ") ", write_document_path(@document,:versionid=>v.id)  %>
+<% end %> <span class="divider">/</span></li>
+</ul>
+<% end %>