Add preview when editing tickets

todosrht/blueprints/ticket.py

@@ -221,6 +221,12 @@ def ticket_edit_POST(owner, name, ticket_id):
         return render_template("edit_ticket.html",
                 tracker=tracker, ticket=ticket, **valid.kwargs)
 
+    if "preview" in request.form:
+        preview = render_markup(tracker, desc)
+        return render_template("edit_ticket.html",
+                tracker=tracker, ticket=ticket, rendered_preview=preview,
+                **valid.kwargs)
+
     ticket.title = title
     ticket.description = desc
     db.session.commit()

todosrht/templates/edit_ticket.html

@@ -60,15 +60,27 @@
         >{{ description or ticket.description or "" }}</textarea>
         {{valid.summary("description")}}
       </div>
-      <div class="pull-right">
+
+      <div class="text-right">
         <a href="{{ ticket|ticket_url }}" class="btn btn-default">
           Cancel
         </a>
+        <button type="submit" name="preview" class="btn btn-default">
+          Preview {{icon("caret-right")}}
+        </button>
         <button
           type="submit"
           class="btn btn-primary"
         >Save changes {{icon("caret-right")}}</button>
       </div>
+
+      {% if rendered_preview %}
+      <div class="ticket-preview">
+        <span class="preview-tag">Ticket preview</span>
+        <h2>{{ title }}</h2>
+        {{ rendered_preview }}
+      </div>
+      {% endif %}
     </div>
   </div>
 </div>