Another step towards Javascriptinput-style script loading

common/lib/capa/capa/templates/textinput_dynamath.html

@@ -2,6 +2,10 @@
 ### version of textline.html which does dynamic math
 ###
 <section class="text-input-dynamath textinputdynamath capa_inputtype" id="inputtype_${id}">
+
+    <div class="textinputdynamath_data" data-preprocessor="MathjaxPreprocessorFor6002x"/>
+    <div class="script_placeholder" data-src="/static/js/mathjax_preprocessor_for_6002x.js"/>
+
     % if state == 'unsubmitted':
     <div class="unanswered" id="status_${id}">
     % elif state == 'correct':
@@ -15,27 +19,26 @@
       <div style="display:none;" name="${hidden}" inputid="input_${id}" />
     % endif
 
-      <input type="text" name="input_${id}" id="input_${id}" value="${value}" class="math" size="${size if size else ''}" 
-       % if hidden:
-      	    style="display:none;"
-       % endif
-      />
-      <div class="script_placeholder" data-src="/static/js/mathjax_preprocessor_for_6002x.js"/>
-      <p class="status">
-        % if state == 'unsubmitted':
-        unanswered
-        % elif state == 'correct':
-        correct
-        % elif state == 'incorrect':
-        incorrect
-        % elif state == 'incomplete':
-        incomplete
-        % endif
-      </p>
+    <input type="text" name="input_${id}" id="input_${id}" value="${value}" class="math" size="${size if size else ''}" 
+    % if hidden:
+        style="display:none;"
+    % endif
+    />
+    <p class="status">
+    % if state == 'unsubmitted':
+    unanswered
+    % elif state == 'correct':
+    correct
+    % elif state == 'incorrect':
+    incorrect
+    % elif state == 'incomplete':
+    incomplete
+    % endif
+    </p>
 
-      <p id="answer_${id}" class="answer"></p>
+    <p id="answer_${id}" class="answer"></p>
 
-      <div id="display_${id}" class="equation">`{::}`</div>
+    <div id="display_${id}" class="equation">`{::}`</div>
 
     </div>
     <textarea style="display:none" id="input_${id}_dynamath" name="input_${id}_dynamath">  </textarea>

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

@@ -297,12 +297,17 @@ class @Problem
 
   refreshMath: (event, element) =>
     element = event.target unless element
-    target = "display_#{element.id.replace(/^input_/, '')}"
+    elid = element.id.replace(/^input_/,'')
+
+    target = "display_" + elid
+
+    preprocessor_tag = "inputtype_" + elid
+    mathjax_preprocessor = @inputtypeDisplays[preprocessor_tag]
 
     if jax = MathJax.Hub.getAllJax(target)[0]
       eqn = $(element).val()
-      if @mathjax_preprocessor
-        eqn = @mathjax_preprocessor(eqn)
+      if mathjax_preprocessor
+        eqn = mathjax_preprocessor(eqn)
 
       MathJax.Hub.Queue ['Text', jax, eqn],
         [@updateMathML, jax, element]
@@ -324,9 +329,13 @@ class @Problem
   inputtypeSetupMethods:
 
     textinputdynamath: (element) =>
-      preprocessorClass = window['MathjaxPreprocessorFor6002x']
+      data = $(element).find('.textinputdynamath_data')
+
+      preprocessorClassName = data.data('preprocessor')
+      preprocessorClass = window[preprocessorClassName]
+
       preprocessor = new preprocessorClass()
-      alert preprocessor.fn
+      return preprocessor.fn
 
     javascriptinput: (element) =>