From 685730475317db0fcbdb486162b628434d39cbcf Mon Sep 17 00:00:00 2001
From: Daniel Thies <dthies@ccal.edu>
Date: Thu, 7 Jul 2016 18:58:15 -0500
Subject: [PATCH] MDL-55007 filter_mathjaxloader: Wrap nolink around each
 expresssion

---
 filter/mathjaxloader/filter.php | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/filter/mathjaxloader/filter.php b/filter/mathjaxloader/filter.php
index 3726c95dd45..88f22bfef26 100644
--- a/filter/mathjaxloader/filter.php
+++ b/filter/mathjaxloader/filter.php
@@ -163,7 +163,19 @@ class filter_mathjaxloader extends moodle_text_filter {
         }
         if ($hasinline || $hasdisplay || $hasextra) {
             $PAGE->requires->yui_module('moodle-filter_mathjaxloader-loader', 'M.filter_mathjaxloader.typeset');
-            return '<span class="nolink"><span class="filter_mathjaxloader_equation">' . $text . '</span></span>';
+            if ($hasextra) {
+                $text = '<span class="nolink">' + $text + '</span>';
+            } else {
+                if ($hasinline) {
+                    $text = preg_replace('/\\\\\\([\S\s]*?\\\\\\)/u',
+                        '<span class="nolink">\0</span>', $text);
+                }
+                if ($hasdisplay) {
+                    $text = preg_replace('/\$\$[\S\s]*?\$\$|\\\\\\[[\S\s]*?\\\\\\]/u',
+                        '<span class="nolink">\0</span>', $text);
+                }
+            }
+            return '<span class="filter_mathjaxloader_equation">' . $text . '</span>';
         }
         return $text;
     }