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www/src/jquery.jslatex.js

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+/*
+ * jsLaTeX v1.2 - jQuery plugin
+ *
+ *  Copyright (c) 2009 Andreas Grech
+ *
+ *  Dual licensed under the MIT and GPL licenses:
+ *    http://www.opensource.org/licenses/mit-license.php
+ *    http://www.gnu.org/licenses/gpl.html
+ *
+ * http://knowledge-aholic.blogspot.com
+ */
+
+(function ($) {
+  var attachToImage = function () {
+    return $("<img/>").attr({
+      src: this.src
+    });
+  },
+    formats = {
+      'gif': attachToImage,
+      'png': attachToImage,
+      'swf': function () {
+        return $("<embed/>").attr({
+          src: this.src,
+          type: 'application/x-shockwave-flash'
+        });
+      }
+    },
+    sections = {
+      '{f}': 'format',
+      '{e}': 'equation'
+    },
+    escapes = {
+      '+': '2B',
+      '=': '3D'
+    };
+
+  $.fn.latex = function (opts) {
+    opts = $.extend({},
+      $.fn.latex.defaults, opts);
+    opts.format = formats[opts.format] ? opts.format : 'gif';
+    return this.each(function () {
+      var $this = $(this),
+        format, s, element, url = opts.url;
+      opts.equation = $.trim($this.text());
+      for (s in sections) {
+        if (sections.hasOwnProperty(s) && (format = url.indexOf(s)) >= 0) {
+          url = url.replace(s, opts[sections[s]]);
+        }
+      }
+      for (s in escapes) {
+        if (escapes.hasOwnProperty(s) && (format = url.indexOf(s)) >= 0) {
+          url = url.replace(s, '%' + escapes[s]);
+        }
+      }
+      opts.src = url;
+      element = formats[opts.format].call(opts);
+      $this.html('').append(element);
+      if (opts.callback) {
+        opts.callback.call(element);
+      }
+    });
+  };
+
+  $.fn.latex.defaults = {
+    format: 'gif',
+    url: 'https://latex.codecogs.com/{f}.latex?{e}'
+  };
+}(jQuery));