1 files changed, 92 insertions, 0 deletions
diff --git a/presentation/plugin/math/math.js b/presentation/plugin/math/math.js
new file mode 100755
index 0000000..dd55aec
--- /dev/null
+++ b/presentation/plugin/math/math.js
@@ -0,0 +1,92 @@
+/**
+ * A plugin which enables rendering of math equations inside
+ * of reveal.js slides. Essentially a thin wrapper for MathJax.
+ *
+ * @author Hakim El Hattab
+ */
+var RevealMath = window.RevealMath || (function () {
+
+    var options = Reveal.getConfig().math || {};
+    var mathjax = options.mathjax || 'https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.0/MathJax.js';
+    var config = options.config || 'TeX-AMS_HTML-full';
+    var url = mathjax + '?config=' + config;
+
+    var defaultOptions = {
+        messageStyle: 'none',
+        tex2jax: {
+            inlineMath: [['$', '$'], ['\\(', '\\)']],
+            skipTags: ['script', 'noscript', 'style', 'textarea', 'pre']
+        },
+        skipStartupTypeset: true
+    };
+
+    function defaults(options, defaultOptions) {
+
+        for (var i in defaultOptions) {
+            if (!options.hasOwnProperty(i)) {
+                options[i] = defaultOptions[i];
+            }
+        }
+
+    }
+
+    function loadScript(url, callback) {
+
+        var head = document.querySelector('head');
+        var script = document.createElement('script');
+        script.type = 'text/javascript';
+        script.src = url;
+
+        // Wrapper for callback to make sure it only fires once
+        var finish = function () {
+            if (typeof callback === 'function') {
+                callback.call();
+                callback = null;
+            }
+        };
+
+        script.onload = finish;
+
+        // IE
+        script.onreadystatechange = function () {
+            if (this.readyState === 'loaded') {
+                finish();
+            }
+        };
+
+        // Normal browsers
+        head.appendChild(script);
+
+    }
+
+    return {
+        init: function () {
+
+            defaults(options, defaultOptions);
+            defaults(options.tex2jax, defaultOptions.tex2jax);
+            options.mathjax = options.config = null;
+
+            loadScript(url, function () {
+
+                MathJax.Hub.Config(options);
+
+                // Typeset followed by an immediate reveal.js layout since
+                // the typesetting process could affect slide height
+                MathJax.Hub.Queue(['Typeset', MathJax.Hub]);
+                MathJax.Hub.Queue(Reveal.layout);
+
+                // Reprocess equations in slides when they turn visible
+                Reveal.addEventListener('slidechanged', function (event) {
+
+                    MathJax.Hub.Queue(['Typeset', MathJax.Hub, event.currentSlide]);
+
+                });
+
+            });
+
+        }
+    }
+
+})();
+
+Reveal.registerPlugin('math', RevealMath);