From 4ae496035873e56520226f6eaa230d354174c061 Mon Sep 17 00:00:00 2001
From: Le Tan <tamlokveer@gmail.com>
Date: Wed, 31 Oct 2018 22:11:40 +0800
Subject: [PATCH] markdown-it: MathJax support $.$ in \text{} within $$...$$

---
 src/resources/markdown_template.js           | 1 +
 src/utils/markdown-it/markdown-it-texmath.js | 4 ++--
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/resources/markdown_template.js b/src/resources/markdown_template.js
index 5cb92548..60b8d4e4 100644
--- a/src/resources/markdown_template.js
+++ b/src/resources/markdown_template.js
@@ -1873,3 +1873,4 @@ var clearMarkRectDivs = function() {
 var startFreshRender = function() {
     skipScrollCheckRange = null;
 };
+
diff --git a/src/utils/markdown-it/markdown-it-texmath.js b/src/utils/markdown-it/markdown-it-texmath.js
index 0395b3f9..0ed249b3 100644
--- a/src/utils/markdown-it/markdown-it-texmath.js
+++ b/src/utils/markdown-it/markdown-it-texmath.js
@@ -161,12 +161,12 @@ texmath.rules = {
         ],
         block: [
             {   name: 'math_block_eqno',
-                rex: /\${2}([^$]*?)\${2}\s*?\(([^)$\r\n]+?)\)\s*$/gmy,
+                rex: /\${2}((?:[^$]|\$(?!\$))*?)\${2}\s*?\(([^)$\r\n]+?)\)\s*$/gmy,
                 tmpl: '<x-eqs><x-eqn class="tex-to-render">$1</x-eqn><span>($2)</span></x-eqs>',
                 tag: '$$'
             },
             {   name: 'math_block',
-                rex: /\${2}([^$]*?)\${2}\s*$/gmy,
+                rex: /\${2}((?:[^$]|\$(?!\$))*?)\${2}\s*$/gmy,
                 tmpl: '<x-eqn class="tex-to-render">$1</x-eqn>',
                 tag: '$$'
             }