Allow Mathjax(Latex) in Student responses

Currently, Latex rendering is only supported for question prompts in ORA2. This
commit introduces Latex rendering in ORA2 student response, peer assessment
view, self assessment view, grade view, and staff-info view. The reason that
this Latex rendering code is inserted directly into ORA2 is that edx-platform,
does not know when to start Latex rendering for ORA2 views that come in via
AJAX.

This commit introduces "Preview in Latex" feature which allows students to see
their response rendered in MathJax before submission.

Conflicts:
	openassessment/xblock/static/js/openassessment-lms.min.js
	openassessment/xblock/static/js/openassessment-studio.min.js

openassessment/templates/openassessmentblock/edit/oa_edit.html

@@ -109,6 +109,16 @@
                     </div>
                     <p class="setting-help">{% trans "Specify whether students can submit an image file along with their text response." %}</p>
                 </li>
+                <li id="openassessment_submission_latex_wrapper" class="field comp-setting-entry">
+                    <div class="wrapper-comp-setting">
+                        <label for="openassessment_submission_latex_editor" class="setting-label">{% trans "Allow Latex Responses"%}</label>
+                        <select id="openassessment_submission_latex_editor" class="input setting-input" name="latex submission">
+                            <option value="0">{% trans "False"%}</option>
+                            <option value="1" {% if allow_latex %} selected="true" {% endif %}>{% trans "True"%}</option>
+                        </select>
+                    </div>
+                    <p class="setting-help">{% trans "Specify whether students can write Latex formatted strings"%}</p>
+                </li>
                 <li id="openassessment_leaderboard_wrapper" class="field comp-setting-entry">
                     <div class="wrapper-comp-setting">
                         <label for="openassessment_leaderboard_editor" class="setting-label">{% trans "Top Responses" %}</label>

openassessment/templates/openassessmentblock/grade/oa_grade_complete.html

 {% load i18n %}
 {% spaceless %}
-<li id="openassessment__grade" class="openassessment__steps__step step--grade is--complete has--grade">
+<li id="openassessment__grade" class="openassessment__steps__step step--grade is--complete has--grade {% if allow_latex %}allow--latex{% endif %}">
     <header class="step__header ui-toggle-visibility__control">
         <h2 class="step__title">
             <span class="wrapper--copy">

openassessment/templates/openassessmentblock/leaderboard/oa_leaderboard_show.html

 {% load i18n %}
 {% spaceless %}
-<li id="openassessment__leaderboard" class="openassessment__steps__step step--leaderboard is--complete">
+<li id="openassessment__leaderboard" class="openassessment__steps__step step--leaderboard is--complete {% if allow_latex %} allow--latex{% endif %}">
     <header class="step__header">
         <h2 class="step__title">
             <span class="wrapper--copy">

openassessment/templates/openassessmentblock/peer/oa_peer_assessment.html

 {% load tz %}
 {% load i18n %}
 {% block list_item %}
-<li id="openassessment__peer-assessment" class="openassessment__steps__step step--peer-assessment ui-toggle-visibility">
+<li id="openassessment__peer-assessment" class="openassessment__steps__step step--peer-assessment ui-toggle-visibility {% if allow_latex %} allow--latex {%endif%}">
 {% endblock %}
 {% spaceless %}
 

openassessment/templates/openassessmentblock/response/oa_response.html

@@ -103,6 +103,24 @@
                                     </h3>
                                 </div>
                             </li>
+                            {% if allow_latex %}
+                            <li class="list--actions__item">
+                                <button type="submit" id="submission__preview" class="action action--save submission__save is--disabled">{% trans "Preview in Latex"%}</button>
+                                <div id="response__preview_explanation" class="response__submission__status">
+                                    <h3 class="response__submission__status__title">
+                                        {% trans "Click to preview your submission in Latex"%}
+                                    </h3>
+                                </div>
+                            </li>
+                            <li id = "submission__preview__item" class="list--actions__item">
+                                <article class="submission__answer__display">
+                                    <h3 class="submission__answer__display__title">Preview Response</h3>
+                                    <div class="submission__answer__display__content">
+                                        <p id="preview_content"></p>
+                                    </div>
+                                </article>
+                            </li>
+                            {% endif %}
                         </ul>
                     </div>
                 </form>

openassessment/templates/openassessmentblock/response/oa_response_graded.html

@@ -2,7 +2,7 @@
 {% load i18n %}
 
 {% block list_item %}
-<li id="openassessment__response" class="openassessment__steps__step step--response is--complete ui-toggle-visibility is--collapsed">
+<li id="openassessment__response" class="openassessment__steps__step step--response is--complete ui-toggle-visibility is--collapsed {% if allow_latex %}allow--latex{%endif%}">
 {% endblock %}
 
 {% block title %}

openassessment/templates/openassessmentblock/response/oa_response_submitted.html

@@ -2,7 +2,7 @@
 {% load i18n %}
 
 {% block list_item %}
-<li id="openassessment__response" class="openassessment__steps__step step--response is--complete ui-toggle-visibility is--collapsed">
+<li id="openassessment__response" class="openassessment__steps__step step--response is--complete ui-toggle-visibility is--collapsed {% if allow_latex %}allow--latex{%endif%}">
 {% endblock %}
 
 {% block title %}

openassessment/templates/openassessmentblock/self/oa_self_assessment.html

@@ -2,7 +2,7 @@
 {% load tz %}
 {% spaceless %}
 {% block list_item %}
-<li id="openassessment__self-assessment" class="openassessment__steps__step step--self-assessment ui-toggle-visibility">
+<li id="openassessment__self-assessment" class="openassessment__steps__step step--self-assessment ui-toggle-visibility {% if allow_latex %}allow--latex{%endif%}">
 {% endblock %}
 
     <header class="step__header ui-toggle-visibility__control">

openassessment/templates/openassessmentblock/student_training/student_training.html

@@ -2,7 +2,7 @@
 {% load tz %}
 {% spaceless %}
 {% block list_item %}
-<li id="openassessment__student-training" class="openassessment__steps__step step--student-training ui-toggle-visibility">
+<li id="openassessment__student-training" class="openassessment__steps__step step--student-training ui-toggle-visibility {% if allow_latex %}allow--latex{%endif%}">
 {% endblock %}
 
 <header class="step__header ui-toggle-visibility__control">

openassessment/xblock/grade_mixin.py

@@ -137,6 +137,7 @@ class GradeMixin(object):
             'rubric_criteria': self._rubric_criteria_grade_context(peer_assessments, self_assessment),
             'has_submitted_feedback': has_submitted_feedback,
             'allow_file_upload': self.allow_file_upload,
+            'allow_latex': self.allow_latex,
             'file_url': self.get_download_url_from_submission(student_submission)
         }
 

openassessment/xblock/leaderboard_mixin.py

@@ -80,7 +80,9 @@ class LeaderboardMixin(object):
             else:
                 score['content'] = ""
 
-        context = { 'topscores': scores }
+        context = { 'topscores': scores,
+                    'allow_latex': self.allow_latex,
+                  }
         return ('openassessmentblock/leaderboard/oa_leaderboard_show.html', context)
 
     def render_leaderboard_incomplete(self):

openassessment/xblock/openassessmentblock.py

@@ -122,6 +122,12 @@ class OpenAssessmentBlock(
         help="File upload allowed with submission."
     )
 
+    allow_latex = Boolean(
+        default=False,
+        scope=Scope.settings,
+        help="Latex rendering allowed with submission."
+    )
+
     title = String(
         default="",
         scope=Scope.content,
@@ -399,6 +405,7 @@ class OpenAssessmentBlock(
         block.title = config['title']
         block.prompt = config['prompt']
         block.allow_file_upload = config['allow_file_upload']
+        block.allow_latex = config['allow_latex']
         block.leaderboard_show = config['leaderboard_show']
 
         return block

openassessment/xblock/peer_assessment_mixin.py

@@ -156,7 +156,8 @@ class PeerAssessmentMixin(object):
 
         context_dict = {
             "rubric_criteria": self.rubric_criteria_with_labels,
-            "estimated_time": "20 minutes"  # TODO: Need to configure this.
+            "estimated_time": "20 minutes",  # TODO: Need to configure this.
+            "allow_latex": self.allow_latex,
         }
 
         if self.rubric_feedback_prompt is not None:

openassessment/xblock/schema.py

@@ -73,6 +73,7 @@ EDITOR_UPDATE_SCHEMA = Schema({
     Required('submission_start'): Any(datetime_validator, None),
     Required('submission_due'): Any(datetime_validator, None),
     Required('allow_file_upload'): bool,
+    Required('allow_latex'): bool,
     Required('leaderboard_show'): int,
     Required('assessments'): [
         Schema({

openassessment/xblock/self_assessment_mixin.py

@@ -51,7 +51,7 @@ class SelfAssessmentMixin(object):
             SubmissionError: Error occurred while retrieving the current submission.
             SelfAssessmentRequestError: Error occurred while checking if we had a self-assessment.
         """
-        context = {}
+        context = {'allow_latex': self.allow_latex}
         path = 'openassessmentblock/self/oa_self_unavailable.html'
         problem_closed, reason, start_date, due_date = self.is_closed(step="self-assessment")
 

openassessment/xblock/staff_info_mixin.py

@@ -137,6 +137,9 @@ class StaffInfoMixin(object):
         # Include release/due dates for each step in the problem
         context['step_dates'] = list()
 
+        # Include Latex setting
+        context['allow_latex'] = self.allow_latex
+
         steps = ['submission'] + self.assessment_steps
         for step in steps:
 

openassessment/xblock/static/js/spec/oa_server.js

@@ -243,6 +243,7 @@ describe("OpenAssessment.Server", function() {
             assessments: ASSESSMENTS,
             editorAssessmentsOrder: EDITOR_ASSESSMENTS_ORDER,
             imageSubmissionEnabled: true,
+            latexEnabled: false,
             leaderboardNum: 15
         });
         expect($.ajax).toHaveBeenCalledWith({
@@ -258,6 +259,7 @@ describe("OpenAssessment.Server", function() {
                 assessments: ASSESSMENTS,
                 editor_assessments_order: EDITOR_ASSESSMENTS_ORDER,
                 allow_file_upload: true,
+                latexEnabled: false,
                 leaderboard_show: 15
             })
         });

openassessment/xblock/static/js/src/lms/oa_peer.js

@@ -52,6 +52,9 @@ OpenAssessment.PeerView.prototype = {
                 // Load the HTML and install event handlers
                 $('#openassessment__peer-assessment', view.element).replaceWith(html);
                 view.installHandlers(true);
+                if (MathJax != undefined && MathJax != null) {
+                    MathJax.Hub.Typeset($('#openassessment__peer-assessment', view.element)[0]);
+                }
             }
         ).fail(function(errMsg) {
             view.baseView.showLoadError('peer-assessment');

openassessment/xblock/static/js/src/lms/oa_response.js

@@ -69,6 +69,8 @@ OpenAssessment.ResponseView.prototype = {
 
         var handlePrepareUpload = function(eventData) { view.prepareUpload(eventData.target.files); };
         sel.find('input[type=file]').on('change', handlePrepareUpload);
+        // keep the preview as display none at first 
+        sel.find('#submission__preview__item').hide();
 
         // Install a click handler for submission
         sel.find('#step--response__submit').click(
@@ -88,6 +90,23 @@ OpenAssessment.ResponseView.prototype = {
             }
         );
 
+        // Install click handler for the preview button
+        sel.find('#submission__preview').click(
+            function(eventObject) {
+                eventObject.preventDefault();
+                // extract typed-in response and replace newline with br
+                var preview_text = sel.find('#submission__answer__value').val();
+                var preview_container = sel.find('#preview_content');
+                preview_container.html(preview_text.replace(/\r\n|\r|\n/g,"<br />"));
+
+                // Render in mathjax
+                sel.find('#submission__preview__item').show();
+                if (MathJax !== undefined && MathJax !== null) {
+                    MathJax.Hub.Queue(['Typeset', MathJax.Hub, preview_container[0]]);
+                }
+            }
+        );
+
         // Install a click handler for the save button
         sel.find('#file__upload').click(
             function(eventObject) {
@@ -174,6 +193,19 @@ OpenAssessment.ResponseView.prototype = {
     },
 
     /**
+    Enable/disable the preview button.
+
+    Works exactly the same way as saveEnabled method.
+    **/
+    previewEnabled: function(enabled) {
+        var sel = $('#submission__preview', this.element);
+        if (typeof enabled === 'undefined') {
+            return !sel.hasClass('is--disabled');
+        } else {
+            sel.toggleClass('is--disabled', !enabled);
+        }
+    },
+    /**
     Set the save status message.
     Retrieve the save status message.
 
@@ -289,6 +321,7 @@ OpenAssessment.ResponseView.prototype = {
         // only if the response has changed
         if (this.responseChanged()) {
             this.saveEnabled(isBlank);
+            this.previewEnabled(isBlank);
             this.saveStatus(gettext('This response has not been saved.'));
             this.unsavedWarningEnabled(true);
         }

openassessment/xblock/static/js/src/oa_server.js

@@ -55,6 +55,7 @@ if (typeof OpenAssessment.Server == "undefined" || !OpenAssessment.Server) {
             )
         **/
         render: function(component) {
+            var that = this;
             var url = this.url('render_' + component);
             return $.Deferred(function(defer) {
                 $.ajax({
@@ -63,6 +64,9 @@ if (typeof OpenAssessment.Server == "undefined" || !OpenAssessment.Server) {
                     dataType: "html"
                 }).done(function(data) {
                     defer.resolveWith(this, [data]);
+                    if (window.MathJax) {
+                        that.renderLatex(); 
+                    }
                 }).fail(function(data) {
                     defer.rejectWith(this, [gettext('This section could not be loaded.')]);
                 });
@@ -70,6 +74,21 @@ if (typeof OpenAssessment.Server == "undefined" || !OpenAssessment.Server) {
         },
 
         /**
+        Render Latex for all new DOM elements with class 'allow--latex'.
+        Once rendered, remove the class so that a single element does
+        not get rendered multiple times.
+        **/
+        renderLatex: function() {
+            var i, latex_elems = $('.allow--latex');
+            if (latex_elems && latex_elems.length !== 0) {
+                for (i = 0; i < latex_elems.length; i++) {
+                    MathJax.Hub.Queue(['Typeset', MathJax.Hub, latex_elems[i]]);
+                }
+            }
+            latex_elems.removeClass('allow--latex');
+        },
+
+        /**
          Render the Peer Assessment Section after a complete workflow, in order to
          continue grading peers.
 
@@ -419,6 +438,7 @@ if (typeof OpenAssessment.Server == "undefined" || !OpenAssessment.Server) {
             criteria (list of object literals): The rubric criteria.
             assessments (list of object literals): The assessments the student will be evaluated on.
             imageSubmissionEnabled (boolean): TRUE if image attachments are allowed.
+            latexEnabled: TRUE if latex rendering is enabled.
             leaderboardNum (int): The number of scores to show in the leaderboard.
 
         Returns:
@@ -439,6 +459,7 @@ if (typeof OpenAssessment.Server == "undefined" || !OpenAssessment.Server) {
                 assessments: kwargs.assessments,
                 editor_assessments_order: kwargs.editorAssessmentsOrder,
                 allow_file_upload: kwargs.imageSubmissionEnabled,
+                allow_latex: kwargs.latexEnabled,
                 leaderboard_show: kwargs.leaderboardNum
             });
             return $.Deferred(function(defer) {

openassessment/xblock/static/js/src/studio/oa_edit.js

@@ -194,6 +194,7 @@ OpenAssessment.StudioView.prototype = {
             submissionDue: view.settingsView.submissionDue(),
             assessments: view.settingsView.assessmentsDescription(),
             imageSubmissionEnabled: view.settingsView.imageSubmissionEnabled(),
+            latexEnabled: view.settingsView.latexEnabled(),
             leaderboardNum: view.settingsView.leaderboardNum(),
             editorAssessmentsOrder: view.settingsView.editorAssessmentsOrder()
         }).done(

openassessment/xblock/static/js/src/studio/oa_edit_settings.js

@@ -141,6 +141,25 @@ OpenAssessment.EditSettingsView.prototype = {
     },
 
     /**
+    Enable / disable latex rendering.
+
+    Args: 
+        isEnabled(boolean, optional): if provided enable/disable latex rendering
+    Returns:
+        boolean
+    **/
+    latexEnabled: function(isEnabled) {
+        var sel = $('#openassessment_submission_latex_editor', this.settingsElement);
+        if (isEnabled !== undefined) {
+            if (isEnabled) {
+                sel.val(1);
+            } else {
+                sel.val(0)
+            }
+        }
+        return (sel.val() == 1);
+    },
+    /**
     Get or set the number of scores to show in the leaderboard.
     If set to 0, the leaderboard will not be shown.
 

openassessment/xblock/static/sass/oa/utilities/_shame.scss

@@ -102,6 +102,7 @@
 
     li {
       margin-bottom: 0 !important;
+      margin-top: 5px !important;
     }
 
     button, .button, .action {

openassessment/xblock/static/sass/oa/views/_oa-base.scss

@@ -541,6 +541,7 @@
         display: block;
         text-align: center;
         margin-bottom: ($baseline-v/2);
+        min-width: 215px;
 
         @include media($bp-ds) {
           display: inline-block;

openassessment/xblock/student_training_mixin.py

@@ -72,6 +72,9 @@ class StudentTrainingMixin(object):
         context = {}
         template = 'openassessmentblock/student_training/student_training_unavailable.html'
 
+        # add allow_latex field to the context
+        context['allow_latex'] = self.allow_latex
+
         if not workflow_status:
             return template, context
 

openassessment/xblock/studio_mixin.py

@@ -121,6 +121,7 @@ class StudioMixin(object):
             'feedbackprompt': self.rubric_feedback_prompt,
             'feedback_default_text': feedback_default_text,
             'allow_file_upload': self.allow_file_upload,
+            'allow_latex': self.allow_latex,
             'leaderboard_show': self.leaderboard_show,
             'editor_assessments_order': [
                 make_django_template_key(asmnt)
@@ -213,6 +214,7 @@ class StudioMixin(object):
         self.submission_start = data['submission_start']
         self.submission_due = data['submission_due']
         self.allow_file_upload = bool(data['allow_file_upload'])
+        self.allow_latex = bool(data['allow_latex'])
         self.leaderboard_show = data['leaderboard_show']
 
         return {'success': True, 'msg': self._(u'Successfully updated OpenAssessment XBlock')}

openassessment/xblock/submission_mixin.py

@@ -337,6 +337,7 @@ class SubmissionMixin(object):
             context["submission_due"] = due_date
 
         context['allow_file_upload'] = self.allow_file_upload
+        context['allow_latex'] = self.allow_latex
         context['has_peer'] = 'peer-assessment' in self.assessment_steps
         context['has_self'] = 'self-assessment' in self.assessment_steps
 

openassessment/xblock/test/data/invalid_update_xblock.json

@@ -5,6 +5,7 @@
         "feedback_prompt": "Feedback prompt",
         "feedback_default_text": "Feedback default text",
         "allow_file_upload": false,
+        "allow_latex": false,
         "leaderboard_show": 0,
         "assessments": [
             {
@@ -29,6 +30,7 @@
         "feedback_prompt": "Feedback prompt",
         "feedback_default_text": "Feedback default text",
         "allow_file_upload": false,
+        "allow_latex": false,
         "leaderboard_show": 0,
         "criteria": [
             {
@@ -78,6 +80,7 @@
     "no_feedback_prompt": {
         "prompt": "Test prompt",
         "allow_file_upload": false,
+        "allow_latex": false,
         "leaderboard_show": 0,
         "criteria": [
             {
@@ -129,6 +132,7 @@
         "feedback_default_text": "Feedback default text",
         "prompt": "Test Prompt",
         "allow_file_upload": false,
+        "allow_latex": false,
         "leaderboard_show": 0,
         "criteria": [
             {
@@ -179,6 +183,7 @@
         "feedback_default_text": "Feedback default text",
         "prompt": "Test Prompt",
         "allow_file_upload": false,
+        "allow_latex": false,
         "leaderboard_show": 0,
         "criteria": [
             {
@@ -231,6 +236,7 @@
         "feedback_default_text": "Feedback default text",
         "prompt": "Test Prompt",
         "allow_file_upload": false,
+        "allow_latex": false,
         "leaderboard_show": 0,
         "criteria": [
             {
@@ -283,6 +289,7 @@
         "feedback_default_text": "Feedback default text",
         "prompt": "Test Prompt",
         "allow_file_upload": false,
+        "allow_latex": false,
         "leaderboard_show": 0,
         "criteria": [
             {
@@ -327,6 +334,7 @@
         "feedback_default_text": "Feedback default text",
         "prompt": "Test Prompt",
         "allow_file_upload": false,
+        "allow_latex": false,
         "leaderboard_show": 0,
         "criteria": [
             {
@@ -370,6 +378,7 @@
         "feedback_default_text": "Feedback default text",
         "prompt": "prompty",
         "allow_file_upload": false,
+        "allow_latex": false,
         "leaderboard_show": 0,
         "criteria": [
             []
@@ -392,6 +401,7 @@
         "feedback_default_text": "Feedback default text",
         "prompt": "Test Prompt",
         "allow_file_upload": false,
+        "allow_latex": false,
         "leaderboard_show": 0,
         "criteria": [
             {
@@ -435,6 +445,7 @@
         "feedback_default_text": "Feedback default text",
         "prompt": "Test Prompt",
         "allow_file_upload": false,
+        "allow_latex": false,
         "leaderboard_show": 0,
         "criteria": [
             {
@@ -464,6 +475,7 @@
         "feedback_default_text": "Feedback default text",
         "prompt": "Test Prompt",
         "allow_file_upload": false,
+        "allow_latex": false,
         "leaderboard_show": 0,
         "criteria": [
             {
@@ -502,6 +514,7 @@
         "feedback_default_text": "Feedback default text",
         "prompt": "Test Prompt",
         "allow_file_upload": false,
+        "allow_latex": false,
         "leaderboard_show": 0,
         "criteria": [
             {
@@ -545,6 +558,7 @@
         "feedback_default_text": "Feedback default text",
         "prompt": "Test Prompt",
         "allow_file_upload": false,
+        "allow_latex": false,
         "leaderboard_show": 0,
         "criteria": [
             {
@@ -587,6 +601,7 @@
         "feedback_default_text": "Feedback default text",
         "prompt": "Test Prompt",
         "allow_file_upload": 6,
+        "allow_latex": false,
         "criteria": [
             {
                 "order_num": 0,
@@ -628,6 +643,7 @@
         "feedback_default_text": "Feedback default text",
         "prompt": "Test Prompt",
         "allow_file_upload": null,
+        "allow_latex": false,
         "criteria": [
             {
                 "order_num": 0,
@@ -699,6 +715,7 @@
         "submission_start": "4014-02-10T09:46",
         "title": "My new title.",
         "allow_file_upload": false,
+        "allow_latex": false,
         "leaderboard_show": 0,
         "assessments": [
             {
@@ -755,6 +772,7 @@
         "submission_start": "4014-02-10T09:46",
         "title": "My new title.",
         "allow_file_upload": false,
+        "allow_latex": false,
         "leaderboard_show": 0,
         "assessments": [
             {
@@ -809,6 +827,7 @@
         "submission_start": "4014-02-10T09:46",
         "title": "My new title.",
         "allow_file_upload": false,
+        "allow_latex": false,
         "leaderboard_show": 0,
         "assessments": [
             {
@@ -866,6 +885,7 @@
         "submission_start": "4014-02-10T09:46",
         "title": "My new title.",
         "allow_file_upload": false,
+        "allow_latex": false,
         "leaderboard_show": 0,
         "assessments": [
             {
@@ -923,6 +943,7 @@
         "submission_start": "4014-02-10T09:46",
         "title": "My new title.",
         "allow_file_upload": false,
+        "allow_latex": false,
         "leaderboard_show": 0,
         "assessments": [
             {
@@ -974,6 +995,7 @@
         "submission_start": "4014-02-10T09:46",
         "title": "My new title.",
         "allow_file_upload": false,
+        "allow_latex": false,
         "leaderboard_show": 0,
         "assessments": [
             {
@@ -1032,6 +1054,7 @@
         "submission_start": "4014-02-10T09:46",
         "title": "My new title.",
         "allow_file_upload": false,
+        "allow_latex": false,
         "leaderboard_show": 0,
         "assessments": [
             {
@@ -1082,6 +1105,7 @@
         "submission_start": "4014-02-10T09:46",
         "title": "My new title.",
         "allow_file_upload": false,
+        "allow_latex": false,
         "leaderboard_show": 0,
         "assessments": [
             {
@@ -1133,6 +1157,7 @@
         "submission_start": "4014-02-10T09:46",
         "title": "My new title.",
         "allow_file_upload": false,
+        "allow_latex": false,
         "leaderboard_show": 0,
         "assessments": [
             {
@@ -1160,6 +1185,7 @@
         "feedback_prompt": "Feedback prompt",
         "feedback_default_text": "Feedback default text",
         "allow_file_upload": false,
+        "allow_latex": false,
         "leaderboard_show": 0,
         "criteria": [
             {
@@ -1210,6 +1236,7 @@
         "feedback_prompt": "Feedback prompt",
         "feedback_default_text": "Feedback default text",
         "allow_file_upload": false,
+        "allow_latex": false,
         "leaderboard_show": 0,
         "criteria": [
             {
@@ -1260,6 +1287,7 @@
         "feedback_prompt": "Feedback prompt",
         "feedback_default_text": "Feedback default text",
         "allow_file_upload": false,
+        "allow_latex": false,
         "leaderboard_show": 0,
         "criteria": [
             {
@@ -1333,6 +1361,7 @@
         "feedback_prompt": "Feedback prompt",
         "feedback_default_text": "Feedback default text",
         "allow_file_upload": false,
+        "allow_latex": false,
         "leaderboard_show": 0,
         "criteria": [
             {

openassessment/xblock/test/data/update_xblock.json

@@ -32,6 +32,7 @@
         "submission_start": "4014-02-10T09:46",
         "title": "My new title.",
         "allow_file_upload": false,
+        "allow_latex": false,
         "leaderboard_show": 0,
         "assessments": [
             {
@@ -83,6 +84,7 @@
         "submission_start": "4014-02-10T09:46",
         "title": "ɯʎ uǝʍ ʇıʇןǝ",
         "allow_file_upload": false,
+        "allow_latex": false,
         "leaderboard_show": 0,
         "assessments": [
             {
@@ -134,6 +136,7 @@
         "submission_start": "4014-02-10T09:46",
         "title": "My new title.",
         "allow_file_upload": false,
+        "allow_latex": false,
         "leaderboard_show": 0,
         "assessments": [
             {
@@ -196,6 +199,7 @@
         "submission_due": "4014-02-27T09:46",
         "submission_start": "4014-02-10T09:46",
         "allow_file_upload": false,
+        "allow_latex": false,
         "leaderboard_show": 0,
         "title": "My new title.",
         "assessments": [

openassessment/xblock/test/test_studio.py

@@ -23,6 +23,7 @@ class StudioViewTest(XBlockHandlerTestCase):
         "submission_start": "4014-02-10T09:46",
         "submission_due": "4014-02-27T09:46",
         "allow_file_upload": False,
+        "allow_latex": False,
         "leaderboard_show": 4,
         "assessments": [{"name": "self-assessment"}],
         "editor_assessments_order": [

openassessment/xblock/test/test_xml.py

@@ -108,6 +108,7 @@ class TestSerializeContent(TestCase):
         self.oa_block.rubric_criteria = data.get('criteria', copy.deepcopy(self.BASIC_CRITERIA))
         self.oa_block.rubric_assessments = data.get('assessments', copy.deepcopy(self.BASIC_ASSESSMENTS))
         self.oa_block.allow_file_upload = data.get('allow_file_upload')
+        self.oa_block.allow_latex = data.get('allow_latex')
         self.oa_block.leaderboard_show = data.get('leaderboard_show', 0)
 
     @ddt.file_data('data/serialize.json')
@@ -408,6 +409,7 @@ class TestParseFromXml(TestCase):
             'criteria',
             'assessments',
             'allow_file_upload',
+            'allow_latex',
             'leaderboard_show'
         ]
         for field_name in expected_fields:

openassessment/xblock/xml.py

@@ -624,6 +624,9 @@ def serialize_content_to_xml(oa_block, root):
     if oa_block.allow_file_upload is not None:
         root.set('allow_file_upload', unicode(oa_block.allow_file_upload))
 
+    if oa_block.allow_latex is not None:
+        root.set('allow_latex', unicode(oa_block.allow_latex))
+
     # Open assessment displayed title
     title = etree.SubElement(root, 'title')
     title.text = unicode(oa_block.title)
@@ -746,6 +749,10 @@ def parse_from_xml(root):
     if 'allow_file_upload' in root.attrib:
         allow_file_upload = _parse_boolean(unicode(root.attrib['allow_file_upload']))
 
+    allow_latex = False
+    if 'allow_latex' in root.attrib:
+        allow_latex = _parse_boolean(unicode(root.attrib['allow_latex']))
+
     # Retrieve the title
     title_el = root.find('title')
     if title_el is None:
@@ -785,6 +792,7 @@ def parse_from_xml(root):
         'submission_start': submission_start,
         'submission_due': submission_due,
         'allow_file_upload': allow_file_upload,
+        'allow_latex': allow_latex,
         'leaderboard_show': leaderboard_show
     }