From c757968bf7f36ccb71cd80a3fb730ab1f4b8bdd7 Mon Sep 17 00:00:00 2001
From: Jaifroid <egk10@cam.ac.uk>
Date: Sun, 3 Nov 2019 21:46:49 +0000
Subject: [PATCH] Ensure KaTeX renders mbox latex by using fbox instead

Former-commit-id: 8de6c00688e6b9451835efb6d8fcc0d128bd2083 [formerly a45ac98da9213213194ccd141f0f30fecf4b0d4b]
Former-commit-id: ba63907396e85eb61bfa6dbccc13e0ed5f864eb5
---
 www/js/app.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/www/js/app.js b/www/js/app.js
index 4c337e1d..e6b999f9 100644
--- a/www/js/app.js
+++ b/www/js/app.js
@@ -2710,6 +2710,8 @@ define(['jquery', 'zimArchiveLoader', 'uiUtil', 'util', 'utf8', 'images', 'cooki
                     function (p0, p1, math) {
                         // Remove any rogue ampersands in MathJax due to double escaping (by Wikipedia)
                         math = math.replace(/&amp;/g, '&');
+                        // Change any mbox commands to fbox (because KaTeX doesn't support mbox)
+                        math = math.replace(/mbox{/g, 'fbox{');
                         return '<script type="math/tex">' + math + '</script>';
                     });
                 // Deal with any newer MathML blocks
@@ -2717,6 +2719,8 @@ define(['jquery', 'zimArchiveLoader', 'uiUtil', 'util', 'utf8', 'images', 'cooki
                     function (_p0, p1, _p2, math, p4) {
                         // Remove any rogue ampersands in MathJax due to double escaping (by Wikipedia)
                         math = math.replace(/&amp;/g, '&');
+                        // Change any mbox commands to fbox (because KaTeX doesn't support mbox)
+                        math = math.replace(/mbox{/g, 'fbox{');
                         return p1 + math + p4 + '<script type="math/tex">' + math + '</script>';
                     });
             }