From 120acf4918347731e777f3ea404cafb56244b55a Mon Sep 17 00:00:00 2001
From: Jessica Lawshe <jessica.lawshe@overleaf.com>
Date: Fri, 13 Jul 2018 15:02:52 -0500
Subject: [PATCH] Optional $ MathJax delimiter

---
 .../public/coffee/directives/mathjax.coffee   | 36 ++++++++++---------
 1 file changed, 19 insertions(+), 17 deletions(-)

diff --git a/services/web/public/coffee/directives/mathjax.coffee b/services/web/public/coffee/directives/mathjax.coffee
index 6d37353c07..269526287e 100644
--- a/services/web/public/coffee/directives/mathjax.coffee
+++ b/services/web/public/coffee/directives/mathjax.coffee
@@ -1,25 +1,27 @@
 define [
 	"base"
-], (App) ->
-	mathjaxConfig =
-		extensions: ["Safe.js"]
-		messageStyle: "none"
-		imageFont:null
-		"HTML-CSS": { availableFonts: ["TeX"] },
-		TeX:
-			equationNumbers: { autoNumber: "AMS" },
-			useLabelIDs: false
-		tex2jax:
-			inlineMath: [ ['$','$'], ["\\(","\\)"] ],
-			displayMath: [ ['$$','$$'], ["\\[","\\]"] ],
-			processEscapes: true
-		skipStartupTypeset: true
-
-	MathJax?.Hub?.Config(mathjaxConfig);
-	
+], (App) ->	
 	App.directive "mathjax", () ->
 		return {
 			link: (scope, element, attrs) ->
+				mathjaxConfig =
+					extensions: ["Safe.js"]
+					messageStyle: "none"
+					imageFont:null
+					"HTML-CSS": { availableFonts: ["TeX"] },
+					TeX:
+						equationNumbers: { autoNumber: "AMS" },
+						useLabelIDs: false
+					skipStartupTypeset: true
+					tex2jax:
+						processEscapes: true,
+						inlineMath: [ ["\\(","\\)"] ],
+						displayMath: [ ['$$','$$'], ["\\[","\\]"] ]
+				if attrs.delimiter != 'no-single-dollar'
+					mathjaxConfig.tex2jax.inlineMath.push(['$','$']);
+
+				MathJax?.Hub?.Config(mathjaxConfig);
+
 				setTimeout () ->
 					MathJax?.Hub?.Queue(["Typeset", MathJax?.Hub, element.get(0)])
 				, 0