Merge pull request #478 from MITx/kimth/fix-sequence-modx

Sequential modx/goto_position hits correct multicourse URL

common/lib/xmodule/xmodule/js/src/sequence/display.coffee

@@ -3,6 +3,7 @@ class @Sequence
     @el = $(element).find('.sequence')
     @contents = @$('.seq_contents')
     @id = @el.data('id')
+    @modx_url = @el.data('course_modx_root')
     @initProgress()
     @bind()
     @render parseInt(@el.data('position'))
@@ -76,13 +77,14 @@ class @Sequence
     if @position != new_position
       if @position != undefined
         @mark_visited @position
-        $.postWithPrefix "/modx/#{@id}/goto_position", position: new_position
+        modx_full_url = @modx_url + '/' + @id + '/goto_position'
+        $.postWithPrefix modx_full_url, position: new_position
 
       @mark_active new_position
       @$('#seq_content').html @contents.eq(new_position - 1).text()
       XModule.loadModules('display', @$('#seq_content'))
 
-      MathJax.Hub.Queue(["Typeset", MathJax.Hub])
+      MathJax.Hub.Queue(["Typeset", MathJax.Hub, "seq_content"]) # NOTE: Actually redundant. Some other MathJax call also being performed
       @position = new_position
       @toggleArrows()
       @hookUpProgressEvent()

lms/templates/seq_module.html

-<div id="sequence_${element_id}" class="sequence" data-id="${item_id}" data-position="${position}" >
+<div id="sequence_${element_id}" class="sequence" data-id="${item_id}" data-position="${position}" data-course_modx_root="/course/modx" >
   <nav aria-label="Section Navigation" class="sequence-nav">
     <ol id="sequence-list">
       % for idx, item in enumerate(items):
@@ -21,7 +21,7 @@
   </nav>
 
   % for item in items:
-  <div class="seq_contents">${item['content'] | h}</div>
+  <div class="seq_contents tex2jax_ignore">${item['content'] | h}</div>
   % endfor
   <div id="seq_content"></div>