From 99a23e4af090cdc2e649d812f6dfdcb7be5b54ed Mon Sep 17 00:00:00 2001
From: nageh <mal.malego@gmail.com>
Date: Fri, 7 Sep 2012 18:23:54 +0200
Subject: [PATCH] Add support to MathJax for RGB colors

PS2: Make the number matcher limited to 3 digits. Fix at base 10.

Originally, but had broken merge: Iff04d5d650ae87d957d57420f71975ccdf4a5370

Change-Id: I6885ea90e920734e324b6d1d1f70af69cdeab033
---
 modules/MathJax/extensions/TeX/texvc.js | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/modules/MathJax/extensions/TeX/texvc.js b/modules/MathJax/extensions/TeX/texvc.js
index d506867..c39ced5 100644
--- a/modules/MathJax/extensions/TeX/texvc.js
+++ b/modules/MathJax/extensions/TeX/texvc.js
@@ -7,6 +7,22 @@ MathJax.Hub.Register.StartupHook("TeX Jax Ready",function () {
 
   var MML = MathJax.ElementJax.mml;
 
+  /*
+   *  Get an RGB color (a triplet of values between 0 and 255)
+   */
+  MathJax.Extension["TeX/color"].get_RGB = function (rgb) {
+    rgb = rgb.split(/,/); var RGB = "#";
+    if (rgb.length !== 3) {this.TEX.Error("RGB colors require 3 decimal numbers")}
+    for (var i = 0; i < 3; i++) {
+      if (!rgb[i].match(/^(\d{1,3})$/)) {this.TEX.Error("Invalid decimal number")}
+      var n = parseInt(rgb[i], 10);
+      if (n < 0 || n > 255) {this.TEX.Error("RGB values must be between 0 and 255")}
+      n = n.toString(16); if (n.length < 2) {n = "0"+n}
+      RGB += n;
+    }
+    return RGB;
+  }
+
   MathJax.Hub.Insert(MathJax.InputJax.TeX.Definitions,{
 
     mathchar0mi: {