diff --git a/ajax/libs/backbone.js/0.3.2/backbone-min.js b/ajax/libs/backbone.js/0.3.2/backbone-min.js
new file mode 100644
index 000000000..f8d7f9e8d
--- /dev/null
+++ b/ajax/libs/backbone.js/0.3.2/backbone-min.js
@@ -0,0 +1,27 @@
+// Backbone.js 0.3.2
+// (c) 2010 Jeremy Ashkenas, DocumentCloud Inc.
+// Backbone may be freely distributed under the MIT license.
+// For all details and documentation:
+// http://documentcloud.github.com/backbone
+(function(){var e;e=typeof exports!=="undefined"?exports:this.Backbone={};e.VERSION="0.3.2";var f=this._;if(!f&&typeof require!=="undefined")f=require("underscore")._;var h=this.jQuery;e.emulateHTTP=false;e.emulateJSON=false;e.Events={bind:function(a,b){this._callbacks||(this._callbacks={});(this._callbacks[a]||(this._callbacks[a]=[])).push(b);return this},unbind:function(a,b){var c;if(a){if(c=this._callbacks)if(b){c=c[a];if(!c)return this;for(var d=0,g=c.length;d').hide().appendTo("body")[0].contentWindow;"onhashchange"in window&&!a?h(window).bind("hashchange",this.checkUrl):setInterval(this.checkUrl,this.interval);return this.loadUrl()},route:function(a,b){this.handlers.push({route:a,callback:b})},checkUrl:function(){var a=this.getFragment();if(a==this.fragment&&this.iframe)a=this.getFragment(this.iframe.location);if(a==this.fragment||a==decodeURIComponent(this.fragment))return false;
+if(this.iframe)window.location.hash=this.iframe.location.hash=a;this.loadUrl()},loadUrl:function(){var a=this.fragment=this.getFragment();return f.any(this.handlers,function(b){if(b.route.test(a)){b.callback(a);return true}})},saveLocation:function(a){a=(a||"").replace(k,"");if(this.fragment!=a){window.location.hash=this.fragment=a;if(this.iframe&&a!=this.getFragment(this.iframe.location)){this.iframe.document.open().close();this.iframe.location.hash=a}}}});e.View=function(a){this._configure(a||{});
+this._ensureElement();this.delegateEvents();this.initialize(a)};var l=function(a){return h(a,this.el)},q=/^(\w+)\s*(.*)$/;f.extend(e.View.prototype,e.Events,{tagName:"div",$:l,jQuery:l,initialize:function(){},render:function(){return this},remove:function(){h(this.el).remove();return this},make:function(a,b,c){a=document.createElement(a);b&&h(a).attr(b);c&&h(a).html(c);return a},delegateEvents:function(a){if(a||(a=this.events)){h(this.el).unbind();for(var b in a){var c=a[b],d=b.match(q),g=d[1];d=
+d[2];c=f.bind(this[c],this);d===""?h(this.el).bind(g,c):h(this.el).delegate(d,g,c)}}},_configure:function(a){if(this.options)a=f.extend({},this.options,a);if(a.model)this.model=a.model;if(a.collection)this.collection=a.collection;if(a.el)this.el=a.el;if(a.id)this.id=a.id;if(a.className)this.className=a.className;if(a.tagName)this.tagName=a.tagName;this.options=a},_ensureElement:function(){if(!this.el){var a={};if(this.id)a.id=this.id;if(this.className)a.className=this.className;this.el=this.make(this.tagName,
+a)}}});var m=function(a,b){var c=r(this,a,b);c.extend=m;return c};e.Model.extend=e.Collection.extend=e.Controller.extend=e.View.extend=m;var s={create:"POST",update:"PUT","delete":"DELETE",read:"GET"};e.sync=function(a,b,c,d){var g=s[a];a=a==="create"||a==="update"?JSON.stringify(b.toJSON()):null;b={url:j(b),type:g,contentType:"application/json",data:a,dataType:"json",processData:false,success:c,error:d};if(e.emulateJSON){b.contentType="application/x-www-form-urlencoded";b.processData=true;b.data=
+a?{model:a}:{}}if(e.emulateHTTP)if(g==="PUT"||g==="DELETE"){if(e.emulateJSON)b.data._method=g;b.type="POST";b.beforeSend=function(i){i.setRequestHeader("X-HTTP-Method-Override",g)}}h.ajax(b)};var n=function(){},r=function(a,b,c){var d;d=b&&b.hasOwnProperty("constructor")?b.constructor:function(){return a.apply(this,arguments)};n.prototype=a.prototype;d.prototype=new n;b&&f.extend(d.prototype,b);c&&f.extend(d,c);d.prototype.constructor=d;d.__super__=a.prototype;return d},j=function(a){if(!(a&&a.url))throw Error("A 'url' property or function must be specified");
+return f.isFunction(a.url)?a.url():a.url}})();
diff --git a/ajax/libs/backbone.js/0.3.2/backbone.js b/ajax/libs/backbone.js/0.3.2/backbone.js
new file mode 100644
index 000000000..4e1a8b4e9
--- /dev/null
+++ b/ajax/libs/backbone.js/0.3.2/backbone.js
@@ -0,0 +1,984 @@
+// Backbone.js 0.3.2
+// (c) 2010 Jeremy Ashkenas, DocumentCloud Inc.
+// Backbone may be freely distributed under the MIT license.
+// For all details and documentation:
+// http://documentcloud.github.com/backbone
+
+(function(){
+
+ // Initial Setup
+ // -------------
+
+ // The top-level namespace. All public Backbone classes and modules will
+ // be attached to this. Exported for both CommonJS and the browser.
+ var Backbone;
+ if (typeof exports !== 'undefined') {
+ Backbone = exports;
+ } else {
+ Backbone = this.Backbone = {};
+ }
+
+ // Current version of the library. Keep in sync with `package.json`.
+ Backbone.VERSION = '0.3.2';
+
+ // Require Underscore, if we're on the server, and it's not already present.
+ var _ = this._;
+ if (!_ && (typeof require !== 'undefined')) _ = require("underscore")._;
+
+ // For Backbone's purposes, jQuery owns the `$` variable.
+ var $ = this.jQuery;
+
+ // Turn on `emulateHTTP` to use support legacy HTTP servers. Setting this option will
+ // fake `"PUT"` and `"DELETE"` requests via the `_method` parameter and set a
+ // `X-Http-Method-Override` header.
+ Backbone.emulateHTTP = false;
+
+ // Turn on `emulateJSON` to support legacy servers that can't deal with direct
+ // `application/json` requests ... will encode the body as
+ // `application/x-www-form-urlencoded` instead and will send the model in a
+ // form param named `model`.
+ Backbone.emulateJSON = false;
+
+ // Backbone.Events
+ // -----------------
+
+ // A module that can be mixed in to *any object* in order to provide it with
+ // custom events. You may `bind` or `unbind` a callback function to an event;
+ // `trigger`-ing an event fires all callbacks in succession.
+ //
+ // var object = {};
+ // _.extend(object, Backbone.Events);
+ // object.bind('expand', function(){ alert('expanded'); });
+ // object.trigger('expand');
+ //
+ Backbone.Events = {
+
+ // Bind an event, specified by a string name, `ev`, to a `callback` function.
+ // Passing `"all"` will bind the callback to all events fired.
+ bind : function(ev, callback) {
+ var calls = this._callbacks || (this._callbacks = {});
+ var list = this._callbacks[ev] || (this._callbacks[ev] = []);
+ list.push(callback);
+ return this;
+ },
+
+ // Remove one or many callbacks. If `callback` is null, removes all
+ // callbacks for the event. If `ev` is null, removes all bound callbacks
+ // for all events.
+ unbind : function(ev, callback) {
+ var calls;
+ if (!ev) {
+ this._callbacks = {};
+ } else if (calls = this._callbacks) {
+ if (!callback) {
+ calls[ev] = [];
+ } else {
+ var list = calls[ev];
+ if (!list) return this;
+ for (var i = 0, l = list.length; i < l; i++) {
+ if (callback === list[i]) {
+ list.splice(i, 1);
+ break;
+ }
+ }
+ }
+ }
+ return this;
+ },
+
+ // Trigger an event, firing all bound callbacks. Callbacks are passed the
+ // same arguments as `trigger` is, apart from the event name.
+ // Listening for `"all"` passes the true event name as the first argument.
+ trigger : function(ev) {
+ var list, calls, i, l;
+ if (!(calls = this._callbacks)) return this;
+ if (list = calls[ev]) {
+ for (i = 0, l = list.length; i < l; i++) {
+ list[i].apply(this, Array.prototype.slice.call(arguments, 1));
+ }
+ }
+ if (list = calls['all']) {
+ for (i = 0, l = list.length; i < l; i++) {
+ list[i].apply(this, arguments);
+ }
+ }
+ return this;
+ }
+
+ };
+
+ // Backbone.Model
+ // --------------
+
+ // Create a new model, with defined attributes. A client id (`cid`)
+ // is automatically generated and assigned for you.
+ Backbone.Model = function(attributes, options) {
+ attributes || (attributes = {});
+ if (this.defaults) attributes = _.extend({}, this.defaults, attributes);
+ this.attributes = {};
+ this.cid = _.uniqueId('c');
+ this.set(attributes, {silent : true});
+ this._previousAttributes = _.clone(this.attributes);
+ if (options && options.collection) this.collection = options.collection;
+ this.initialize(attributes, options);
+ };
+
+ // Attach all inheritable methods to the Model prototype.
+ _.extend(Backbone.Model.prototype, Backbone.Events, {
+
+ // A snapshot of the model's previous attributes, taken immediately
+ // after the last `"change"` event was fired.
+ _previousAttributes : null,
+
+ // Has the item been changed since the last `"change"` event?
+ _changed : false,
+
+ // Initialize is an empty function by default. Override it with your own
+ // initialization logic.
+ initialize : function(){},
+
+ // Return a copy of the model's `attributes` object.
+ toJSON : function() {
+ return _.clone(this.attributes);
+ },
+
+ // Get the value of an attribute.
+ get : function(attr) {
+ return this.attributes[attr];
+ },
+
+ // Set a hash of model attributes on the object, firing `"change"` unless you
+ // choose to silence it.
+ set : function(attrs, options) {
+
+ // Extract attributes and options.
+ options || (options = {});
+ if (!attrs) return this;
+ if (attrs.attributes) attrs = attrs.attributes;
+ var now = this.attributes;
+
+ // Run validation.
+ if (!options.silent && this.validate && !this._performValidation(attrs, options)) return false;
+
+ // Check for changes of `id`.
+ if ('id' in attrs) this.id = attrs.id;
+
+ // Update attributes.
+ for (var attr in attrs) {
+ var val = attrs[attr];
+ if (!_.isEqual(now[attr], val)) {
+ now[attr] = val;
+ if (!options.silent) {
+ this._changed = true;
+ this.trigger('change:' + attr, this, val);
+ }
+ }
+ }
+
+ // Fire the `"change"` event, if the model has been changed.
+ if (!options.silent && this._changed) this.change();
+ return this;
+ },
+
+ // Remove an attribute from the model, firing `"change"` unless you choose
+ // to silence it.
+ unset : function(attr, options) {
+ options || (options = {});
+ var value = this.attributes[attr];
+
+ // Run validation.
+ var validObj = {};
+ validObj[attr] = void 0;
+ if (!options.silent && this.validate && !this._performValidation(validObj, options)) return false;
+
+ // Remove the attribute.
+ delete this.attributes[attr];
+ if (!options.silent) {
+ this._changed = true;
+ this.trigger('change:' + attr, this);
+ this.change();
+ }
+ return this;
+ },
+
+ // Clear all attributes on the model, firing `"change"` unless you choose
+ // to silence it.
+ clear : function(options) {
+ options || (options = {});
+ var old = this.attributes;
+
+ // Run validation.
+ var validObj = {};
+ for (attr in old) validObj[attr] = void 0;
+ if (!options.silent && this.validate && !this._performValidation(validObj, options)) return false;
+
+ this.attributes = {};
+ if (!options.silent) {
+ this._changed = true;
+ for (attr in old) {
+ this.trigger('change:' + attr, this);
+ }
+ this.change();
+ }
+ return this;
+ },
+
+ // Fetch the model from the server. If the server's representation of the
+ // model differs from its current attributes, they will be overriden,
+ // triggering a `"change"` event.
+ fetch : function(options) {
+ options || (options = {});
+ var model = this;
+ var success = function(resp) {
+ if (!model.set(model.parse(resp), options)) return false;
+ if (options.success) options.success(model, resp);
+ };
+ var error = options.error && _.bind(options.error, null, model);
+ (this.sync || Backbone.sync)('read', this, success, error);
+ return this;
+ },
+
+ // Set a hash of model attributes, and sync the model to the server.
+ // If the server returns an attributes hash that differs, the model's
+ // state will be `set` again.
+ save : function(attrs, options) {
+ options || (options = {});
+ if (attrs && !this.set(attrs, options)) return false;
+ var model = this;
+ var success = function(resp) {
+ if (!model.set(model.parse(resp), options)) return false;
+ if (options.success) options.success(model, resp);
+ };
+ var error = options.error && _.bind(options.error, null, model);
+ var method = this.isNew() ? 'create' : 'update';
+ (this.sync || Backbone.sync)(method, this, success, error);
+ return this;
+ },
+
+ // Destroy this model on the server. Upon success, the model is removed
+ // from its collection, if it has one.
+ destroy : function(options) {
+ options || (options = {});
+ var model = this;
+ var success = function(resp) {
+ if (model.collection) model.collection.remove(model);
+ if (options.success) options.success(model, resp);
+ };
+ var error = options.error && _.bind(options.error, null, model);
+ (this.sync || Backbone.sync)('delete', this, success, error);
+ return this;
+ },
+
+ // Default URL for the model's representation on the server -- if you're
+ // using Backbone's restful methods, override this to change the endpoint
+ // that will be called.
+ url : function() {
+ var base = getUrl(this.collection);
+ if (this.isNew()) return base;
+ return base + (base.charAt(base.length - 1) == '/' ? '' : '/') + this.id;
+ },
+
+ // **parse** converts a response into the hash of attributes to be `set` on
+ // the model. The default implementation is just to pass the response along.
+ parse : function(resp) {
+ return resp;
+ },
+
+ // Create a new model with identical attributes to this one.
+ clone : function() {
+ return new this.constructor(this);
+ },
+
+ // A model is new if it has never been saved to the server, and has a negative
+ // ID.
+ isNew : function() {
+ return !this.id;
+ },
+
+ // Call this method to manually fire a `change` event for this model.
+ // Calling this will cause all objects observing the model to update.
+ change : function() {
+ this.trigger('change', this);
+ this._previousAttributes = _.clone(this.attributes);
+ this._changed = false;
+ },
+
+ // Determine if the model has changed since the last `"change"` event.
+ // If you specify an attribute name, determine if that attribute has changed.
+ hasChanged : function(attr) {
+ if (attr) return this._previousAttributes[attr] != this.attributes[attr];
+ return this._changed;
+ },
+
+ // Return an object containing all the attributes that have changed, or false
+ // if there are no changed attributes. Useful for determining what parts of a
+ // view need to be updated and/or what attributes need to be persisted to
+ // the server.
+ changedAttributes : function(now) {
+ now || (now = this.attributes);
+ var old = this._previousAttributes;
+ var changed = false;
+ for (var attr in now) {
+ if (!_.isEqual(old[attr], now[attr])) {
+ changed = changed || {};
+ changed[attr] = now[attr];
+ }
+ }
+ return changed;
+ },
+
+ // Get the previous value of an attribute, recorded at the time the last
+ // `"change"` event was fired.
+ previous : function(attr) {
+ if (!attr || !this._previousAttributes) return null;
+ return this._previousAttributes[attr];
+ },
+
+ // Get all of the attributes of the model at the time of the previous
+ // `"change"` event.
+ previousAttributes : function() {
+ return _.clone(this._previousAttributes);
+ },
+
+ // Run validation against a set of incoming attributes, returning `true`
+ // if all is well. If a specific `error` callback has been passed,
+ // call that instead of firing the general `"error"` event.
+ _performValidation : function(attrs, options) {
+ var error = this.validate(attrs);
+ if (error) {
+ if (options.error) {
+ options.error(this, error);
+ } else {
+ this.trigger('error', this, error);
+ }
+ return false;
+ }
+ return true;
+ }
+
+ });
+
+ // Backbone.Collection
+ // -------------------
+
+ // Provides a standard collection class for our sets of models, ordered
+ // or unordered. If a `comparator` is specified, the Collection will maintain
+ // its models in sort order, as they're added and removed.
+ Backbone.Collection = function(models, options) {
+ options || (options = {});
+ if (options.comparator) {
+ this.comparator = options.comparator;
+ delete options.comparator;
+ }
+ this._boundOnModelEvent = _.bind(this._onModelEvent, this);
+ this._reset();
+ if (models) this.refresh(models, {silent: true});
+ this.initialize(models, options);
+ };
+
+ // Define the Collection's inheritable methods.
+ _.extend(Backbone.Collection.prototype, Backbone.Events, {
+
+ // The default model for a collection is just a **Backbone.Model**.
+ // This should be overridden in most cases.
+ model : Backbone.Model,
+
+ // Initialize is an empty function by default. Override it with your own
+ // initialization logic.
+ initialize : function(){},
+
+ // The JSON representation of a Collection is an array of the
+ // models' attributes.
+ toJSON : function() {
+ return this.map(function(model){ return model.toJSON(); });
+ },
+
+ // Add a model, or list of models to the set. Pass **silent** to avoid
+ // firing the `added` event for every new model.
+ add : function(models, options) {
+ if (_.isArray(models)) {
+ for (var i = 0, l = models.length; i < l; i++) {
+ this._add(models[i], options);
+ }
+ } else {
+ this._add(models, options);
+ }
+ return this;
+ },
+
+ // Remove a model, or a list of models from the set. Pass silent to avoid
+ // firing the `removed` event for every model removed.
+ remove : function(models, options) {
+ if (_.isArray(models)) {
+ for (var i = 0, l = models.length; i < l; i++) {
+ this._remove(models[i], options);
+ }
+ } else {
+ this._remove(models, options);
+ }
+ return this;
+ },
+
+ // Get a model from the set by id.
+ get : function(id) {
+ if (id == null) return null;
+ return this._byId[id.id != null ? id.id : id];
+ },
+
+ // Get a model from the set by client id.
+ getByCid : function(cid) {
+ return cid && this._byCid[cid.cid || cid];
+ },
+
+ // Get the model at the given index.
+ at: function(index) {
+ return this.models[index];
+ },
+
+ // Force the collection to re-sort itself. You don't need to call this under normal
+ // circumstances, as the set will maintain sort order as each item is added.
+ sort : function(options) {
+ options || (options = {});
+ if (!this.comparator) throw new Error('Cannot sort a set without a comparator');
+ this.models = this.sortBy(this.comparator);
+ if (!options.silent) this.trigger('refresh', this);
+ return this;
+ },
+
+ // Pluck an attribute from each model in the collection.
+ pluck : function(attr) {
+ return _.map(this.models, function(model){ return model.get(attr); });
+ },
+
+ // When you have more items than you want to add or remove individually,
+ // you can refresh the entire set with a new list of models, without firing
+ // any `added` or `removed` events. Fires `refresh` when finished.
+ refresh : function(models, options) {
+ models || (models = []);
+ options || (options = {});
+ this._reset();
+ this.add(models, {silent: true});
+ if (!options.silent) this.trigger('refresh', this);
+ return this;
+ },
+
+ // Fetch the default set of models for this collection, refreshing the
+ // collection when they arrive.
+ fetch : function(options) {
+ options || (options = {});
+ var collection = this;
+ var success = function(resp) {
+ collection.refresh(collection.parse(resp));
+ if (options.success) options.success(collection, resp);
+ };
+ var error = options.error && _.bind(options.error, null, collection);
+ (this.sync || Backbone.sync)('read', this, success, error);
+ return this;
+ },
+
+ // Create a new instance of a model in this collection. After the model
+ // has been created on the server, it will be added to the collection.
+ create : function(model, options) {
+ var coll = this;
+ options || (options = {});
+ if (!(model instanceof Backbone.Model)) {
+ model = new this.model(model, {collection: coll});
+ } else {
+ model.collection = coll;
+ }
+ var success = function(nextModel, resp) {
+ coll.add(nextModel);
+ if (options.success) options.success(nextModel, resp);
+ };
+ return model.save(null, {success : success, error : options.error});
+ },
+
+ // **parse** converts a response into a list of models to be added to the
+ // collection. The default implementation is just to pass it through.
+ parse : function(resp) {
+ return resp;
+ },
+
+ // Proxy to _'s chain. Can't be proxied the same way the rest of the
+ // underscore methods are proxied because it relies on the underscore
+ // constructor.
+ chain: function () {
+ return _(this.models).chain();
+ },
+
+ // Reset all internal state. Called when the collection is refreshed.
+ _reset : function(options) {
+ this.length = 0;
+ this.models = [];
+ this._byId = {};
+ this._byCid = {};
+ },
+
+ // Internal implementation of adding a single model to the set, updating
+ // hash indexes for `id` and `cid` lookups.
+ _add : function(model, options) {
+ options || (options = {});
+ if (!(model instanceof Backbone.Model)) {
+ model = new this.model(model, {collection: this});
+ }
+ var already = this.getByCid(model);
+ if (already) throw new Error(["Can't add the same model to a set twice", already.id]);
+ this._byId[model.id] = model;
+ this._byCid[model.cid] = model;
+ model.collection = this;
+ var index = this.comparator ? this.sortedIndex(model, this.comparator) : this.length;
+ this.models.splice(index, 0, model);
+ model.bind('all', this._boundOnModelEvent);
+ this.length++;
+ if (!options.silent) model.trigger('add', model, this);
+ return model;
+ },
+
+ // Internal implementation of removing a single model from the set, updating
+ // hash indexes for `id` and `cid` lookups.
+ _remove : function(model, options) {
+ options || (options = {});
+ model = this.getByCid(model) || this.get(model);
+ if (!model) return null;
+ delete this._byId[model.id];
+ delete this._byCid[model.cid];
+ delete model.collection;
+ this.models.splice(this.indexOf(model), 1);
+ this.length--;
+ if (!options.silent) model.trigger('remove', model, this);
+ model.unbind('all', this._boundOnModelEvent);
+ return model;
+ },
+
+ // Internal method called every time a model in the set fires an event.
+ // Sets need to update their indexes when models change ids. All other
+ // events simply proxy through.
+ _onModelEvent : function(ev, model) {
+ if (ev === 'change:id') {
+ delete this._byId[model.previous('id')];
+ this._byId[model.id] = model;
+ }
+ this.trigger.apply(this, arguments);
+ }
+
+ });
+
+ // Underscore methods that we want to implement on the Collection.
+ var methods = ['forEach', 'each', 'map', 'reduce', 'reduceRight', 'find', 'detect',
+ 'filter', 'select', 'reject', 'every', 'all', 'some', 'any', 'include',
+ 'invoke', 'max', 'min', 'sortBy', 'sortedIndex', 'toArray', 'size',
+ 'first', 'rest', 'last', 'without', 'indexOf', 'lastIndexOf', 'isEmpty'];
+
+ // Mix in each Underscore method as a proxy to `Collection#models`.
+ _.each(methods, function(method) {
+ Backbone.Collection.prototype[method] = function() {
+ return _[method].apply(_, [this.models].concat(_.toArray(arguments)));
+ };
+ });
+
+ // Backbone.Controller
+ // -------------------
+
+ // Controllers map faux-URLs to actions, and fire events when routes are
+ // matched. Creating a new one sets its `routes` hash, if not set statically.
+ Backbone.Controller = function(options) {
+ options || (options = {});
+ if (options.routes) this.routes = options.routes;
+ this._bindRoutes();
+ this.initialize(options);
+ };
+
+ // Cached regular expressions for matching named param parts and splatted
+ // parts of route strings.
+ var namedParam = /:([\w\d]+)/g;
+ var splatParam = /\*([\w\d]+)/g;
+
+ // Set up all inheritable **Backbone.Controller** properties and methods.
+ _.extend(Backbone.Controller.prototype, Backbone.Events, {
+
+ // Initialize is an empty function by default. Override it with your own
+ // initialization logic.
+ initialize : function(){},
+
+ // Manually bind a single named route to a callback. For example:
+ //
+ // this.route('search/:query/p:num', 'search', function(query, num) {
+ // ...
+ // });
+ //
+ route : function(route, name, callback) {
+ Backbone.history || (Backbone.history = new Backbone.History);
+ if (!_.isRegExp(route)) route = this._routeToRegExp(route);
+ Backbone.history.route(route, _.bind(function(fragment) {
+ var args = this._extractParameters(route, fragment);
+ callback.apply(this, args);
+ this.trigger.apply(this, ['route:' + name].concat(args));
+ }, this));
+ },
+
+ // Simple proxy to `Backbone.history` to save a fragment into the history,
+ // without triggering routes.
+ saveLocation : function(fragment) {
+ Backbone.history.saveLocation(fragment);
+ },
+
+ // Bind all defined routes to `Backbone.history`.
+ _bindRoutes : function() {
+ if (!this.routes) return;
+ for (var route in this.routes) {
+ var name = this.routes[route];
+ this.route(route, name, this[name]);
+ }
+ },
+
+ // Convert a route string into a regular expression, suitable for matching
+ // against the current location fragment.
+ _routeToRegExp : function(route) {
+ route = route.replace(namedParam, "([^\/]*)").replace(splatParam, "(.*?)");
+ return new RegExp('^' + route + '$');
+ },
+
+ // Given a route, and a URL fragment that it matches, return the array of
+ // extracted parameters.
+ _extractParameters : function(route, fragment) {
+ return route.exec(fragment).slice(1);
+ }
+
+ });
+
+ // Backbone.History
+ // ----------------
+
+ // Handles cross-browser history management, based on URL hashes. If the
+ // browser does not support `onhashchange`, falls back to polling.
+ Backbone.History = function() {
+ this.handlers = [];
+ this.fragment = this.getFragment();
+ _.bindAll(this, 'checkUrl');
+ };
+
+ // Cached regex for cleaning hashes.
+ var hashStrip = /^#*/;
+
+ // Set up all inheritable **Backbone.History** properties and methods.
+ _.extend(Backbone.History.prototype, {
+
+ // The default interval to poll for hash changes, if necessary, is
+ // twenty times a second.
+ interval: 50,
+
+ // Get the cross-browser normalized URL fragment.
+ getFragment : function(loc) {
+ return (loc || window.location).hash.replace(hashStrip, '');
+ },
+
+ // Start the hash change handling, returning `true` if the current URL matches
+ // an existing route, and `false` otherwise.
+ start : function() {
+ var docMode = document.documentMode;
+ var oldIE = ($.browser.msie && (!docMode || docMode <= 7));
+ if (oldIE) {
+ this.iframe = $('').hide().appendTo('body')[0].contentWindow;
+ }
+ if ('onhashchange' in window && !oldIE) {
+ $(window).bind('hashchange', this.checkUrl);
+ } else {
+ setInterval(this.checkUrl, this.interval);
+ }
+ return this.loadUrl();
+ },
+
+ // Add a route to be tested when the hash changes. Routes are matched in the
+ // order they are added.
+ route : function(route, callback) {
+ this.handlers.push({route : route, callback : callback});
+ },
+
+ // Checks the current URL to see if it has changed, and if it has,
+ // calls `loadUrl`, normalizing across the hidden iframe.
+ checkUrl : function() {
+ var current = this.getFragment();
+ if (current == this.fragment && this.iframe) {
+ current = this.getFragment(this.iframe.location);
+ }
+ if (current == this.fragment ||
+ current == decodeURIComponent(this.fragment)) return false;
+ if (this.iframe) {
+ window.location.hash = this.iframe.location.hash = current;
+ }
+ this.loadUrl();
+ },
+
+ // Attempt to load the current URL fragment. If a route succeeds with a
+ // match, returns `true`. If no defined routes matches the fragment,
+ // returns `false`.
+ loadUrl : function() {
+ var fragment = this.fragment = this.getFragment();
+ var matched = _.any(this.handlers, function(handler) {
+ if (handler.route.test(fragment)) {
+ handler.callback(fragment);
+ return true;
+ }
+ });
+ return matched;
+ },
+
+ // Save a fragment into the hash history. You are responsible for properly
+ // URL-encoding the fragment in advance. This does not trigger
+ // a `hashchange` event.
+ saveLocation : function(fragment) {
+ fragment = (fragment || '').replace(hashStrip, '');
+ if (this.fragment == fragment) return;
+ window.location.hash = this.fragment = fragment;
+ if (this.iframe && (fragment != this.getFragment(this.iframe.location))) {
+ this.iframe.document.open().close();
+ this.iframe.location.hash = fragment;
+ }
+ }
+
+ });
+
+ // Backbone.View
+ // -------------
+
+ // Creating a Backbone.View creates its initial element outside of the DOM,
+ // if an existing element is not provided...
+ Backbone.View = function(options) {
+ this._configure(options || {});
+ this._ensureElement();
+ this.delegateEvents();
+ this.initialize(options);
+ };
+
+ // jQuery lookup, scoped to DOM elements within the current view.
+ // This should be prefered to global jQuery lookups, if you're dealing with
+ // a specific view.
+ var jQueryDelegate = function(selector) {
+ return $(selector, this.el);
+ };
+
+ // Cached regex to split keys for `delegate`.
+ var eventSplitter = /^(\w+)\s*(.*)$/;
+
+ // Set up all inheritable **Backbone.View** properties and methods.
+ _.extend(Backbone.View.prototype, Backbone.Events, {
+
+ // The default `tagName` of a View's element is `"div"`.
+ tagName : 'div',
+
+ // Attach the jQuery function as the `$` and `jQuery` properties.
+ $ : jQueryDelegate,
+ jQuery : jQueryDelegate,
+
+ // Initialize is an empty function by default. Override it with your own
+ // initialization logic.
+ initialize : function(){},
+
+ // **render** is the core function that your view should override, in order
+ // to populate its element (`this.el`), with the appropriate HTML. The
+ // convention is for **render** to always return `this`.
+ render : function() {
+ return this;
+ },
+
+ // Remove this view from the DOM. Note that the view isn't present in the
+ // DOM by default, so calling this method may be a no-op.
+ remove : function() {
+ $(this.el).remove();
+ return this;
+ },
+
+ // For small amounts of DOM Elements, where a full-blown template isn't
+ // needed, use **make** to manufacture elements, one at a time.
+ //
+ // var el = this.make('li', {'class': 'row'}, this.model.get('title'));
+ //
+ make : function(tagName, attributes, content) {
+ var el = document.createElement(tagName);
+ if (attributes) $(el).attr(attributes);
+ if (content) $(el).html(content);
+ return el;
+ },
+
+ // Set callbacks, where `this.callbacks` is a hash of
+ //
+ // *{"event selector": "callback"}*
+ //
+ // {
+ // 'mousedown .title': 'edit',
+ // 'click .button': 'save'
+ // }
+ //
+ // pairs. Callbacks will be bound to the view, with `this` set properly.
+ // Uses jQuery event delegation for efficiency.
+ // Omitting the selector binds the event to `this.el`.
+ // This only works for delegate-able events: not `focus`, `blur`, and
+ // not `change`, `submit`, and `reset` in Internet Explorer.
+ delegateEvents : function(events) {
+ if (!(events || (events = this.events))) return;
+ $(this.el).unbind();
+ for (var key in events) {
+ var methodName = events[key];
+ var match = key.match(eventSplitter);
+ var eventName = match[1], selector = match[2];
+ var method = _.bind(this[methodName], this);
+ if (selector === '') {
+ $(this.el).bind(eventName, method);
+ } else {
+ $(this.el).delegate(selector, eventName, method);
+ }
+ }
+ },
+
+ // Performs the initial configuration of a View with a set of options.
+ // Keys with special meaning *(model, collection, id, className)*, are
+ // attached directly to the view.
+ _configure : function(options) {
+ if (this.options) options = _.extend({}, this.options, options);
+ if (options.model) this.model = options.model;
+ if (options.collection) this.collection = options.collection;
+ if (options.el) this.el = options.el;
+ if (options.id) this.id = options.id;
+ if (options.className) this.className = options.className;
+ if (options.tagName) this.tagName = options.tagName;
+ this.options = options;
+ },
+
+ // Ensure that the View has a DOM element to render into.
+ _ensureElement : function() {
+ if (this.el) return;
+ var attrs = {};
+ if (this.id) attrs.id = this.id;
+ if (this.className) attrs.className = this.className;
+ this.el = this.make(this.tagName, attrs);
+ }
+
+ });
+
+ // The self-propagating extend function that Backbone classes use.
+ var extend = function (protoProps, classProps) {
+ var child = inherits(this, protoProps, classProps);
+ child.extend = extend;
+ return child;
+ };
+
+ // Set up inheritance for the model, collection, and view.
+ Backbone.Model.extend = Backbone.Collection.extend =
+ Backbone.Controller.extend = Backbone.View.extend = extend;
+
+ // Map from CRUD to HTTP for our default `Backbone.sync` implementation.
+ var methodMap = {
+ 'create': 'POST',
+ 'update': 'PUT',
+ 'delete': 'DELETE',
+ 'read' : 'GET'
+ };
+
+ // Backbone.sync
+ // -------------
+
+ // Override this function to change the manner in which Backbone persists
+ // models to the server. You will be passed the type of request, and the
+ // model in question. By default, uses jQuery to make a RESTful Ajax request
+ // to the model's `url()`. Some possible customizations could be:
+ //
+ // * Use `setTimeout` to batch rapid-fire updates into a single request.
+ // * Send up the models as XML instead of JSON.
+ // * Persist models via WebSockets instead of Ajax.
+ //
+ // Turn on `Backbone.emulateHTTP` in order to send `PUT` and `DELETE` requests
+ // as `POST`, with a `_method` parameter containing the true HTTP method,
+ // as well as all requests with the body as `application/x-www-form-urlencoded` instead of
+ // `application/json` with the model in a param named `model`.
+ // Useful when interfacing with server-side languages like **PHP** that make
+ // it difficult to read the body of `PUT` requests.
+ Backbone.sync = function(method, model, success, error) {
+ var type = methodMap[method];
+ var modelJSON = (method === 'create' || method === 'update') ?
+ JSON.stringify(model.toJSON()) : null;
+
+ // Default JSON-request options.
+ var params = {
+ url: getUrl(model),
+ type: type,
+ contentType: 'application/json',
+ data: modelJSON,
+ dataType: 'json',
+ processData: false,
+ success: success,
+ error: error
+ };
+
+ // For older servers, emulate JSON by encoding the request into an HTML-form.
+ if (Backbone.emulateJSON) {
+ params.contentType = 'application/x-www-form-urlencoded';
+ params.processData = true;
+ params.data = modelJSON ? {model : modelJSON} : {};
+ }
+
+ // For older servers, emulate HTTP by mimicking the HTTP method with `_method`
+ // And an `X-HTTP-Method-Override` header.
+ if (Backbone.emulateHTTP) {
+ if (type === 'PUT' || type === 'DELETE') {
+ if (Backbone.emulateJSON) params.data._method = type;
+ params.type = 'POST';
+ params.beforeSend = function(xhr) {
+ xhr.setRequestHeader("X-HTTP-Method-Override", type);
+ };
+ }
+ }
+
+ // Make the request.
+ $.ajax(params);
+ };
+
+ // Helpers
+ // -------
+
+ // Shared empty constructor function to aid in prototype-chain creation.
+ var ctor = function(){};
+
+ // Helper function to correctly set up the prototype chain, for subclasses.
+ // Similar to `goog.inherits`, but uses a hash of prototype properties and
+ // class properties to be extended.
+ var inherits = function(parent, protoProps, staticProps) {
+ var child;
+
+ // 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 `super()`.
+ if (protoProps && protoProps.hasOwnProperty('constructor')) {
+ child = protoProps.constructor;
+ } else {
+ child = function(){ return parent.apply(this, arguments); };
+ }
+
+ // Set the prototype chain to inherit from `parent`, without calling
+ // `parent`'s constructor function.
+ ctor.prototype = parent.prototype;
+ child.prototype = new ctor();
+
+ // Add prototype properties (instance properties) to the subclass,
+ // if supplied.
+ if (protoProps) _.extend(child.prototype, protoProps);
+
+ // Add static properties to the constructor function, if supplied.
+ if (staticProps) _.extend(child, staticProps);
+
+ // Correctly set child's `prototype.constructor`, for `instanceof`.
+ child.prototype.constructor = child;
+
+ // Set a convenience property in case the parent's prototype is needed later.
+ child.__super__ = parent.prototype;
+
+ return child;
+ };
+
+ // Helper function to get a URL from a Model or Collection as a property
+ // or as a function.
+ var getUrl = function(object) {
+ if (!(object && object.url)) throw new Error("A 'url' property or function must be specified");
+ return _.isFunction(object.url) ? object.url() : object.url;
+ };
+
+})();