Added javascript library backbone-super.

TNL-1499

lms/static/js/spec/main.js

@@ -30,6 +30,7 @@
             'backbone': 'xmodule_js/common_static/js/vendor/backbone-min',
             'backbone.associations': 'xmodule_js/common_static/js/vendor/backbone-associations-min',
             'backbone.paginator': 'xmodule_js/common_static/js/vendor/backbone.paginator.min',
+            "backbone-super": "js/vendor/backbone-super",
             'tinymce': 'xmodule_js/common_static/js/vendor/tinymce/js/tinymce/tinymce.full.min',
             'jquery.tinymce': 'xmodule_js/common_static/js/vendor/tinymce/js/tinymce/jquery.tinymce',
             'xmodule': 'xmodule_js/src/xmodule',
@@ -197,6 +198,9 @@
                 deps: ['backbone'],
                 exports: 'Backbone.Paginator'
             },
+            "backbone-super": {
+                deps: ["backbone"],
+            },
             'youtube': {
                 exports: 'YT'
             },

lms/static/js/vendor/backbone-super.js

@@ -0,0 +1,114 @@
+// https://github.com/lukasolson/backbone-super
+// MIT License
+
+// This is a plugin, constructed from parts of Backbone.js and John Resig's inheritance script.
+// (See http://backbonejs.org, http://ejohn.org/blog/simple-javascript-inheritance/)
+// No credit goes to me as I did absolutely nothing except patch these two together.
+(function(root, factory) {
+
+  // Set up Backbone appropriately for the environment. Start with AMD.
+  if (typeof define === 'function' && define.amd) {
+    define(['underscore', 'backbone'], function(_, Backbone) {
+      // Export global even in AMD case in case this script is loaded with
+      // others that may still expect a global Backbone.
+      factory( _, Backbone);
+    });
+
+  // Next for Node.js or CommonJS.
+  } else if (typeof exports !== 'undefined' && typeof require === 'function') {
+    var _ = require('underscore'),
+		Backbone = require('backbone');
+    factory(_, Backbone);
+
+  // Finally, as a browser global.
+  } else {
+    factory(root._, root.Backbone);
+  }
+
+}(this, function factory(_, Backbone) {
+	Backbone.Model.extend = Backbone.Collection.extend = Backbone.Router.extend = Backbone.View.extend = function(protoProps, classProps) {
+		var child = inherits(this, protoProps, classProps);
+		child.extend = this.extend;
+		return child;
+	};
+	var unImplementedSuper = function(method){throw "Super does not implement this method: " + method;};
+
+  var fnTest = /\b_super\b/;
+
+  var makeWrapper = function(parentProto, name, fn) {
+    var wrapper = function() {
+      var tmp = this._super;
+
+      // Add a new ._super() method that is the same method
+      // but on the super-class
+      this._super = parentProto[name] || unImplementedSuper(name);
+
+      // The method only need to be bound temporarily, so we
+      // remove it when we're done executing
+      var ret;
+      try {
+        ret = fn.apply(this, arguments);
+      } finally {
+        this._super = tmp;
+      }
+      return ret;
+    };
+
+    //we must move properties from old function to new
+    for (var prop in fn) {
+      wrapper[prop] = fn[prop];
+      delete fn[prop];
+    }
+
+    return wrapper;
+  };
+
+	var ctor = function(){}, inherits = function(parent, protoProps, staticProps) {
+        var child, parentProto = parent.prototype;
+
+		// The constructor function for the new subclass is either defined by you
+		// (the "constructor" property in your `extend` definition), or defaulted
+		// by us to simply call the parent's constructor.
+		if (protoProps && protoProps.hasOwnProperty('constructor')) {
+			child = protoProps.constructor;
+		} else {
+			child = function(){ return parent.apply(this, arguments); };
+		}
+
+		// Inherit class (static) properties from parent.
+		_.extend(child, parent, staticProps);
+
+		// Set the prototype chain to inherit from `parent`, without calling
+		// `parent`'s constructor function.
+		ctor.prototype = parentProto;
+		child.prototype = new ctor();
+
+		// Add prototype properties (instance properties) to the subclass,
+		// if supplied.
+		if (protoProps) {
+			_.extend(child.prototype, protoProps);
+
+			// Copy the properties over onto the new prototype
+			for (var name in protoProps) {
+				// Check if we're overwriting an existing function
+				if (typeof protoProps[name] == "function" && fnTest.test(protoProps[name])) {
+					child.prototype[name] = makeWrapper(parentProto, name, protoProps[name]);
+				}
+			}
+		}
+
+		// Add static properties to the constructor function, if supplied.
+		if (staticProps) _.extend(child, staticProps);
+
+		// Correctly set child's `prototype.constructor`.
+		child.prototype.constructor = child;
+
+		// Set a convenience property in case the parent's prototype is needed later.
+		child.__super__ = parentProto;
+
+		return child;
+	};
+
+	return inherits;
+}));
+

lms/static/require-config-lms.js

@@ -47,6 +47,7 @@
             "annotator_1.2.9": "js/vendor/edxnotes/annotator-full.min",
             "date": "js/vendor/date",
             "backbone": "js/vendor/backbone-min",
+            "backbone-super": "js/vendor/backbone-super",
             "underscore.string": "js/vendor/underscore.string.min",
             // Files needed by OVA
             "annotator": "js/vendor/ova/annotator-full",
@@ -87,6 +88,9 @@
                 deps: ["underscore", "jquery"],
                 exports: "Backbone"
             },
+            "backbone-super": {
+                deps: ["backbone"],
+            },
             "logger": {
                 exports: "Logger"
             },