Merge pull request #6832 from edx/waqas/tnl1149-discussion-mathjax-solution

Discussion forum should be independent of mathjax 

common/static/coffee/src/discussion/views/discussion_thread_profile_view.coffee

@@ -10,6 +10,7 @@ if Backbone?
       @$el.html(Mustache.render(@template, params))
       @$("span.timeago").timeago()
       element = @$(".post-body")
+      if MathJax?
         MathJax.Hub.Queue ["Typeset", MathJax.Hub, element[0]]
       @
 

common/static/coffee/src/discussion/views/discussion_thread_show_view.coffee

@@ -32,6 +32,7 @@ if Backbone?
     convertMath: ->
       element = @$(".post-body")
       element.html DiscussionUtil.postMathJaxProcessor DiscussionUtil.markdownWithHighlight element.text()
+      if MathJax?
         MathJax.Hub.Queue ["Typeset", MathJax.Hub, element[0]]
 
     edit: (event) ->

common/static/coffee/src/discussion/views/response_comment_show_view.coffee

@@ -33,6 +33,7 @@ if Backbone?
     convertMath: ->
       body = @$el.find(".response-body")
       body.html DiscussionUtil.postMathJaxProcessor DiscussionUtil.markdownWithHighlight body.text()
+      if MathJax?
         MathJax.Hub.Queue ["Typeset", MathJax.Hub, body[0]]
 
     _delete: (event) =>

common/static/coffee/src/discussion/views/thread_response_show_view.coffee

@@ -27,6 +27,7 @@ if Backbone?
     convertMath: ->
       element = @$(".response-body")
       element.html DiscussionUtil.postMathJaxProcessor DiscussionUtil.markdownWithHighlight element.text()
+      if MathJax?
         MathJax.Hub.Queue ["Typeset", MathJax.Hub, element[0]]
 
     edit: (event) ->

common/templates/mathjax_include.html

@@ -12,6 +12,7 @@
     tex2jax: {inlineMath: [ ['$','$'], ["\\(","\\)"]],
               displayMath: [ ['$$','$$'], ["\\[","\\]"]]}
   });
+  HUB = MathJax.Hub
 </script>
 %else:
 <script type="text/x-mathjax-config">
@@ -27,6 +28,7 @@
       ]
     }
   });
+  HUB = MathJax.Hub
 </script>
 %endif
 

lms/static/coffee/src/customwmd.coffee

@@ -2,11 +2,6 @@
 
 $ ->
 
-  if not MathJax?
-    return
-
-  HUB = MathJax.Hub
-
   class MathJaxProcessor
 
     MATHSPLIT = /// (
@@ -116,6 +111,7 @@ $ ->
     Markdown.getMathCompatibleConverter = (postProcessor) ->
       postProcessor ||= ((text) -> text)
       converter = Markdown.getSanitizingConverter()
+      if MathJax?
         processor = new MathJaxProcessor()
         converter.hooks.chain "preConversion", MathJaxProcessor.removeMathWrapper(processor)
         converter.hooks.chain "postConversion", (text) ->

lms/static/coffee/src/mathjax_delay_renderer.coffee

@@ -57,7 +57,7 @@ class @MathJaxDelayRenderer
         @$buffer.html(text)
         curTime = getTime()
         @elapsedTime = curTime - prevTime
-        if MathJax
+        if MathJax?
           prevTime = getTime()
           @mathjaxRunning = true
           MathJax.Hub.Queue ["Typeset", MathJax.Hub, @$buffer.attr("id")], =>