From ee55b7489865f81da07a3c1fd14154958ea26851 Mon Sep 17 00:00:00 2001
From: Hardy <hardy0wu@gmail.com>
Date: Thu, 14 Aug 2014 18:00:34 -0400
Subject: [PATCH] add --mathjax [CONFIG] to inject root-repo/[CONFIG] file,

which is similar to the behavior of --css and --js.
CONFIG is "mathjax.config.js" by default.
---
 README.md                            |  1 +
 bin/gollum                           |  4 ++++
 lib/gollum/app.rb                    |  1 +
 lib/gollum/templates/layout.mustache | 12 +++++++++---
 lib/gollum/views/page.rb             |  4 ++++
 5 files changed, 19 insertions(+), 3 deletions(-)

diff --git a/README.md b/README.md
index 43208fd4..f5a058a3 100644
--- a/README.md
+++ b/README.md
@@ -111,6 +111,7 @@ Options:
         --live-preview               Enables livepreview.
         --allow-uploads              Allows file uploads.
         --mathjax                    Enables mathjax.
+        --mathjax-config [SOURCE]    Inject custom mathjax config. Uses mathjax.config.js from root repository by default
         --user-icons [SOURCE]        Set the history user icons. Valid values: gravatar, identicon, none. Default: none.
         --show-all                   Shows all files in file view. By default only valid pages are shown.
         --collapse-tree              Collapse file view tree. By default, expanded tree is shown.
diff --git a/bin/gollum b/bin/gollum
index 3a4908e2..4a5c1f4a 100755
--- a/bin/gollum
+++ b/bin/gollum
@@ -93,6 +93,10 @@ opts = OptionParser.new do |opts|
     wiki_options[:mathjax] = true
   end
 
+  opts.on("--mathjax-config [SOURCE]", "Inject custom mathjax config file. Uses mathjax.config.js from root repository by default") do |source|
+    wiki_options[:mathjax_config] = source || 'mathjax.config.js'
+  end
+
   opts.on("--user-icons [SOURCE]", "Set the history user icons. Valid values: gravatar, identicon, none. Default: none.") do |source|
     wiki_options[:user_icons] = source
   end
diff --git a/lib/gollum/app.rb b/lib/gollum/app.rb
index 600ec654..d5000efe 100644
--- a/lib/gollum/app.rb
+++ b/lib/gollum/app.rb
@@ -91,6 +91,7 @@ module Precious
       settings.wiki_options.merge!({ :base_path => @base_url })
       @css = settings.wiki_options[:css]
       @js  = settings.wiki_options[:js]
+      @mathjax_config = settings.wiki_options[:mathjax_config]
     end
 
     get '/' do
diff --git a/lib/gollum/templates/layout.mustache b/lib/gollum/templates/layout.mustache
index 7c58bdd4..805b6361 100644
--- a/lib/gollum/templates/layout.mustache
+++ b/lib/gollum/templates/layout.mustache
@@ -31,15 +31,21 @@
   <script type="text/javascript" src="{{base_url}}/javascript/identicon_canvas.js"></script>
   {{/use_identicon}}
   {{#mathjax}}
-  <script type="text/x-mathjax-config">
-  MathJax.Hub.Config({
+  {{^mathjax_config}}
+  <script type="text/javascript">
+  window.MathJax = {
     tex2jax: {
       inlineMath:  [ ['\\(','\\)'] ],
       displayMath: [ ['$$','$$'], ['\\[','\\]'] ],
       processEscapes: true
     },
-    TeX: { extensions: ["autoload-all.js"] }});
+    TeX: { extensions: ["autoload-all.js"] }
+  };
   </script>
+  {{/mathjax_config}}
+  {{#mathjax_config}}
+  <script type="text/javascript" src="{{base_url}}/{{mathjax_config}}"></script>
+  {{/mathjax_config}}
   <script>(function(d,j){
   j = d.createElement('script');
   j.src = '//cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML';
diff --git a/lib/gollum/views/page.rb b/lib/gollum/views/page.rb
index 5c20d59a..c48d4f33 100644
--- a/lib/gollum/views/page.rb
+++ b/lib/gollum/views/page.rb
@@ -110,6 +110,10 @@ module Precious
         @mathjax
       end
 
+      def mathjax_config
+        @mathjax_config
+      end
+
       def use_identicon
         @page.wiki.user_icons == 'identicon'
       end