added silentSave in edit view so that alert boxes don't pop up

cms/static/coffee/src/views/module_edit.coffee

@@ -5,6 +5,7 @@ class CMS.Views.ModuleEdit extends Backbone.View
   events:
     'click .cancel': 'cancel'
     'click .module-edit': 'editSubmodule'
+    'click .silent-save-update': 'silentSave'
     'click .save-update': 'save'
 
   initialize: ->
@@ -29,6 +30,17 @@ class CMS.Views.ModuleEdit extends Backbone.View
       alert("There was an error saving your changes. Please try again.")
     )
 
+  silentSave: (event) -> 
+    event.preventDefault()
+    @model.save().done((previews) =>
+      previews_section = @$el.find('.previews').empty()
+      $.each(previews, (idx, preview) =>
+        preview_wrapper = $('<section/>', class: 'preview').append preview
+        previews_section.append preview_wrapper
+      )
+      XModule.loadModules('display')
+    )
+  
   cancel: (event) ->
     event.preventDefault()
     CMS.popView()

cms/templates/widgets/capa-edit.html

 <section class="capa-edit">
+  <a class="silent-save-update" />
   <div class="parser-message-box" style="display:none;">Input parsed successfully.</div>
-  <script type="text/javascript" src="/static/grammars/xml-validator.js"></script>
-  <script type="text/javascript" src="/static/grammars/peg-0.7.0.min.js"></script>
   <textarea name="" class="edit-box source-box" rows="8" cols="40"></textarea>
   <textarea name="" class="edit-box capa-box" rows="8" cols="40">${data}</textarea>
 </section>

common/lib/xmodule/xmodule/capa_module.py

@@ -75,7 +75,9 @@ class CapaModule(XModule):
 
     js = {'coffee': [resource_string(__name__, 'js/src/capa/display.coffee')],
           'js': [resource_string(__name__, 'js/src/capa/imageinput.js'),
-                 resource_string(__name__, 'js/src/capa/schematic.js')]}
+                 resource_string(__name__, 'js/src/capa/schematic.js'),
+                 resource_string(__name__, 'js/src/capa/peg-0.7.0.min.js'),
+                 resource_string(__name__, 'js/src/capa/xml-validator.js')]}
     js_module_name = "Problem"
     css = {'scss': [resource_string(__name__, 'css/capa/display.scss')]}
 
@@ -446,8 +448,6 @@ class CapaModule(XModule):
         try:
             old_state = self.lcp.get_state()
             lcp_id = self.lcp.problem_id
-            import pdb
-            pdb.set_trace()
             correct_map = self.lcp.grade_answers(answers)
         except StudentInputError as inst:
             # TODO (vshnayder): why is this line here?

common/lib/xmodule/xmodule/js/src/capa/edit.coffee

@@ -33,7 +33,7 @@ class @CapaDescriptor
         @auto_save_timer = window.setTimeout(callback, 1000)
 
     autoSave: (event) ->
-        $(".save-update").click();
+        $(".silent-save-update").click();
 
     parse: ->
         try

cms/static/grammars/xml-validator.js → common/lib/xmodule/xmodule/js/src/capa/xml-validator.js

@@ -42,10 +42,9 @@ function validateXML(txt) {
         if (xmlDoc.parseError.errorCode != 0) {
             txt = "Error Code: " + xmlDoc.parseError.errorCode + "\n";
             txt = txt + "Error Reason: " + xmlDoc.parseError.reason;
-            txt = txt + "Error Line: " + xmlDoc.parseError.line;
-            return false;
+            return txt;
         } else {
-            return true;
+            return xmlDoc;
         }
     }
     // code for Mozilla, Firefox, Opera, etc.
@@ -55,9 +54,9 @@ function validateXML(txt) {
 
         if (xmlDoc.getElementsByTagName("parsererror").length > 0) {
             checkErrorXML(xmlDoc.getElementsByTagName("parsererror")[0]);
-            return false;
+            return xt;
         } else {
-            return true;
+            return xmlDoc;
         }
     } else {
     }