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diff --git a/samples/JavaScript/json2_backbone.js b/samples/JavaScript/json2_backbone.js new file mode 100644 index 0000000..ccf1225 --- /dev/null +++ b/samples/JavaScript/json2_backbone.js @@ -0,0 +1,1152 @@ +// Inline json2 +var JSON;if(!JSON){JSON={}}(function(){function f(n){return n<10?"0"+n:n}if(typeof Date.prototype.toJSON!=="function"){Date.prototype.toJSON=function(key){return isFinite(this.valueOf())?this.getUTCFullYear()+"-"+f(this.getUTCMonth()+1)+"-"+f(this.getUTCDate())+"T"+f(this.getUTCHours())+":"+f(this.getUTCMinutes())+":"+f(this.getUTCSeconds())+"Z":null};String.prototype.toJSON=Number.prototype.toJSON=Boolean.prototype.toJSON=function(key){return this.valueOf()}}var cx=/[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,escapable=/[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,gap,indent,meta={"\b":"\\b","\t":"\\t","\n":"\\n","\f":"\\f","\r":"\\r",'"':'\\"',"\\":"\\\\"},rep;function quote(string){escapable.lastIndex=0;return escapable.test(string)?'"'+string.replace(escapable,function(a){var c=meta[a];return typeof c==="string"?c:"\\u"+("0000"+a.charCodeAt(0).toString(16)).slice(-4)})+'"':'"'+string+'"'}function str(key,holder){var i,k,v,length,mind=gap,partial,value=holder[key];if(value&&typeof value==="object"&&typeof value.toJSON==="function"){value=value.toJSON(key)}if(typeof rep==="function"){value=rep.call(holder,key,value)}switch(typeof value){case"string":return quote(value);case"number":return isFinite(value)?String(value):"null";case"boolean":case"null":return String(value);case"object":if(!value){return"null"}gap+=indent;partial=[];if(Object.prototype.toString.apply(value)==="[object Array]"){length=value.length;for(i=0;i<length;i+=1){partial[i]=str(i,value)||"null"}v=partial.length===0?"[]":gap?"[\n"+gap+partial.join(",\n"+gap)+"\n"+mind+"]":"["+partial.join(",")+"]";gap=mind;return v}if(rep&&typeof rep==="object"){length=rep.length;for(i=0;i<length;i+=1){if(typeof rep[i]==="string"){k=rep[i];v=str(k,value);if(v){partial.push(quote(k)+(gap?": ":":")+v)}}}}else{for(k in value){if(Object.prototype.hasOwnProperty.call(value,k)){v=str(k,value);if(v){partial.push(quote(k)+(gap?": ":":")+v)}}}}v=partial.length===0?"{}":gap?"{\n"+gap+partial.join(",\n"+gap)+"\n"+mind+"}":"{"+partial.join(",")+"}";gap=mind;return v}}if(typeof JSON.stringify!=="function"){JSON.stringify=function(value,replacer,space){var i;gap="";indent="";if(typeof space==="number"){for(i=0;i<space;i+=1){indent+=" "}}else{if(typeof space==="string"){indent=space}}rep=replacer;if(replacer&&typeof replacer!=="function"&&(typeof replacer!=="object"||typeof replacer.length!=="number")){throw new Error("JSON.stringify")}return str("",{"":value})}}if(typeof JSON.parse!=="function"){JSON.parse=function(text,reviver){var j;function walk(holder,key){var k,v,value=holder[key];if(value&&typeof value==="object"){for(k in value){if(Object.prototype.hasOwnProperty.call(value,k)){v=walk(value,k);if(v!==undefined){value[k]=v}else{delete value[k]}}}}return reviver.call(holder,key,value)}text=String(text);cx.lastIndex=0;if(cx.test(text)){text=text.replace(cx,function(a){return"\\u"+("0000"+a.charCodeAt(0).toString(16)).slice(-4)})}if(/^[\],:{}\s]*$/.test(text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g,"@").replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g,"]").replace(/(?:^|:|,)(?:\s*\[)+/g,""))){j=eval("("+text+")");return typeof reviver==="function"?walk({"":j},""):j}throw new SyntaxError("JSON.parse")}}}()); + +// Backbone.js 0.5.0 +// (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 + // ------------- + + // Save a reference to the global object. + var root = this; + + // Save the previous value of the `Backbone` variable. + var previousBackbone = root.Backbone; + + // 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 = root.Backbone = {}; + } + + // Current version of the library. Keep in sync with `package.json`. + Backbone.VERSION = '0.5.0'; + + // Require Underscore, if we're on the server, and it's not already present. + var _ = root._; + if (!_ && (typeof require !== 'undefined')) _ = require('underscore')._; + + // For Backbone's purposes, jQuery or Zepto owns the `$` variable. + var $ = root.jQuery || root.Zepto; + + // Runs Backbone.js in *noConflict* mode, returning the `Backbone` variable + // to its previous owner. Returns a reference to this Backbone object. + Backbone.noConflict = function() { + root.Backbone = previousBackbone; + return this; + }; + + // 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 = calls[ev] || (calls[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[i] = null; + 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(eventName) { + var list, calls, ev, callback, args; + var both = 2; + if (!(calls = this._callbacks)) return this; + while (both--) { + ev = both ? eventName : 'all'; + if (list = calls[ev]) { + for (var i = 0, l = list.length; i < l; i++) { + if (!(callback = list[i])) { + list.splice(i, 1); i--; l--; + } else { + args = both ? Array.prototype.slice.call(arguments, 1) : arguments; + callback.apply(this, args); + } + } + } + } + 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) { + var defaults; + attributes || (attributes = {}); + if (defaults = this.defaults) { + if (_.isFunction(defaults)) defaults = defaults(); + attributes = _.extend({}, defaults, attributes); + } + this.attributes = {}; + this._escapedAttributes = {}; + this.cid = _.uniqueId('c'); + this.set(attributes, {silent : true}); + this._changed = false; + this._previousAttributes = _.clone(this.attributes); + if (options && options.collection) this.collection = options.collection; + this.initialize.apply(this, arguments); + }; + + // 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, + + // The default name for the JSON `id` attribute is `"id"`. MongoDB and + // CouchDB users may want to set this to `"_id"`. + idAttribute : 'id', + + // 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]; + }, + + // Get the HTML-escaped value of an attribute. + escape : function(attr) { + var html; + if (html = this._escapedAttributes[attr]) return html; + var val = this.attributes[attr]; + return this._escapedAttributes[attr] = escapeHTML(val == null ? '' : '' + val); + }, + + // Returns `true` if the attribute contains a value that is not null + // or undefined. + has : function(attr) { + return this.attributes[attr] != null; + }, + + // 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, escaped = this._escapedAttributes; + + // Run validation. + if (!options.silent && this.validate && !this._performValidation(attrs, options)) return false; + + // Check for changes of `id`. + if (this.idAttribute in attrs) this.id = attrs[this.idAttribute]; + + // We're about to start triggering change events. + var alreadyChanging = this._changing; + this._changing = true; + + // Update attributes. + for (var attr in attrs) { + var val = attrs[attr]; + if (!_.isEqual(now[attr], val)) { + now[attr] = val; + delete escaped[attr]; + this._changed = true; + if (!options.silent) this.trigger('change:' + attr, this, val, options); + } + } + + // Fire the `"change"` event, if the model has been changed. + if (!alreadyChanging && !options.silent && this._changed) this.change(options); + this._changing = false; + return this; + }, + + // Remove an attribute from the model, firing `"change"` unless you choose + // to silence it. `unset` is a noop if the attribute doesn't exist. + unset : function(attr, options) { + if (!(attr in this.attributes)) return this; + 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]; + delete this._escapedAttributes[attr]; + if (attr == this.idAttribute) delete this.id; + this._changed = true; + if (!options.silent) { + this.trigger('change:' + attr, this, void 0, options); + this.change(options); + } + return this; + }, + + // Clear all attributes on the model, firing `"change"` unless you choose + // to silence it. + clear : function(options) { + options || (options = {}); + var attr; + 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 = {}; + this._escapedAttributes = {}; + this._changed = true; + if (!options.silent) { + for (attr in old) { + this.trigger('change:' + attr, this, void 0, options); + } + this.change(options); + } + 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 = options.success; + options.success = function(resp, status, xhr) { + if (!model.set(model.parse(resp, xhr), options)) return false; + if (success) success(model, resp); + }; + options.error = wrapError(options.error, model, options); + return (this.sync || Backbone.sync).call(this, 'read', this, options); + }, + + // 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 = options.success; + options.success = function(resp, status, xhr) { + if (!model.set(model.parse(resp, xhr), options)) return false; + if (success) success(model, resp, xhr); + }; + options.error = wrapError(options.error, model, options); + var method = this.isNew() ? 'create' : 'update'; + return (this.sync || Backbone.sync).call(this, method, this, options); + }, + + // Destroy this model on the server if it was already persisted. Upon success, the model is removed + // from its collection, if it has one. + destroy : function(options) { + options || (options = {}); + if (this.isNew()) return this.trigger('destroy', this, this.collection, options); + var model = this; + var success = options.success; + options.success = function(resp) { + model.trigger('destroy', model, model.collection, options); + if (success) success(model, resp); + }; + options.error = wrapError(options.error, model, options); + return (this.sync || Backbone.sync).call(this, 'delete', this, options); + }, + + // 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) || this.urlRoot || urlError(); + if (this.isNew()) return base; + return base + (base.charAt(base.length - 1) == '/' ? '' : '/') + encodeURIComponent(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, xhr) { + 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 lacks an id. + isNew : function() { + return this.id == null; + }, + + // 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(options) { + this.trigger('change', this, options); + 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, options); + } else { + this.trigger('error', this, error, options); + } + 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; + _.bindAll(this, '_onModelEvent', '_removeReference'); + this._reset(); + if (models) this.reset(models, {silent: true}); + this.initialize.apply(this, arguments); + }; + + // 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('reset', this, options); + 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 reset the entire set with a new list of models, without firing + // any `added` or `removed` events. Fires `reset` when finished. + reset : function(models, options) { + models || (models = []); + options || (options = {}); + this.each(this._removeReference); + this._reset(); + this.add(models, {silent: true}); + if (!options.silent) this.trigger('reset', this, options); + return this; + }, + + // Fetch the default set of models for this collection, resetting the + // collection when they arrive. If `add: true` is passed, appends the + // models to the collection instead of resetting. + fetch : function(options) { + options || (options = {}); + var collection = this; + var success = options.success; + options.success = function(resp, status, xhr) { + collection[options.add ? 'add' : 'reset'](collection.parse(resp, xhr), options); + if (success) success(collection, resp); + }; + options.error = wrapError(options.error, collection, options); + return (this.sync || Backbone.sync).call(this, 'read', this, options); + }, + + // 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. + // Returns the model, or 'false' if validation on a new model fails. + create : function(model, options) { + var coll = this; + options || (options = {}); + model = this._prepareModel(model, options); + if (!model) return false; + var success = options.success; + options.success = function(nextModel, resp, xhr) { + coll.add(nextModel, options); + if (success) success(nextModel, resp, xhr); + }; + model.save(null, options); + return model; + }, + + // **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, xhr) { + 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 reset. + _reset : function(options) { + this.length = 0; + this.models = []; + this._byId = {}; + this._byCid = {}; + }, + + // Prepare a model to be added to this collection + _prepareModel: function(model, options) { + if (!(model instanceof Backbone.Model)) { + var attrs = model; + model = new this.model(attrs, {collection: this}); + if (model.validate && !model._performValidation(attrs, options)) model = false; + } else if (!model.collection) { + model.collection = this; + } + return model; + }, + + // Internal implementation of adding a single model to the set, updating + // hash indexes for `id` and `cid` lookups. + // Returns the model, or 'false' if validation on a new model fails. + _add : function(model, options) { + options || (options = {}); + model = this._prepareModel(model, options); + if (!model) return false; + var already = this.getByCid(model) || this.get(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; + var index = options.at != null ? options.at : + this.comparator ? this.sortedIndex(model, this.comparator) : + this.length; + this.models.splice(index, 0, model); + model.bind('all', this._onModelEvent); + this.length++; + if (!options.silent) model.trigger('add', model, this, options); + 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]; + this.models.splice(this.indexOf(model), 1); + this.length--; + if (!options.silent) model.trigger('remove', model, this, options); + this._removeReference(model); + return model; + }, + + // Internal method to remove a model's ties to a collection. + _removeReference : function(model) { + if (this == model.collection) { + delete model.collection; + } + model.unbind('all', this._onModelEvent); + }, + + // 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. "add" and "remove" events that originate + // in other collections are ignored. + _onModelEvent : function(ev, model, collection, options) { + if ((ev == 'add' || ev == 'remove') && collection != this) return; + if (ev == 'destroy') { + this._remove(model, options); + } + if (model && ev === 'change:' + model.idAttribute) { + delete this._byId[model.previous(model.idAttribute)]; + 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.Router + // ------------------- + + // Routers 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.Router = function(options) { + options || (options = {}); + if (options.routes) this.routes = options.routes; + this._bindRoutes(); + this.initialize.apply(this, arguments); + }; + + // Cached regular expressions for matching named param parts and splatted + // parts of route strings. + var namedParam = /:([\w\d]+)/g; + var splatParam = /\*([\w\d]+)/g; + var escapeRegExp = /[-[\]{}()+?.,\\^$|#\s]/g; + + // Set up all inheritable **Backbone.Router** properties and methods. + _.extend(Backbone.Router.prototype, Backbone.Events, { + + // Initialize is an empty function by default. Override it with your own + // initialization logic. + initialize : function(){}, + + // Manually bind a single named route to a callback. For example: + // + // this.route('search/:query/p:num', 'search', function(query, num) { + // ... + // }); + // + route : function(route, name, callback) { + Backbone.history || (Backbone.history = new Backbone.History); + if (!_.isRegExp(route)) route = this._routeToRegExp(route); + Backbone.history.route(route, _.bind(function(fragment) { + var args = this._extractParameters(route, fragment); + callback.apply(this, args); + this.trigger.apply(this, ['route:' + name].concat(args)); + }, this)); + }, + + // Simple proxy to `Backbone.history` to save a fragment into the history. + navigate : function(fragment, triggerRoute) { + Backbone.history.navigate(fragment, triggerRoute); + }, + + // Bind all defined routes to `Backbone.history`. We have to reverse the + // order of the routes here to support behavior where the most general + // routes can be defined at the bottom of the route map. + _bindRoutes : function() { + if (!this.routes) return; + var routes = []; + for (var route in this.routes) { + routes.unshift([route, this.routes[route]]); + } + for (var i = 0, l = routes.length; i < l; i++) { + this.route(routes[i][0], routes[i][1], this[routes[i][1]]); + } + }, + + // Convert a route string into a regular expression, suitable for matching + // against the current location hash. + _routeToRegExp : function(route) { + route = route.replace(escapeRegExp, "\\$&") + .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 fragments. If the + // browser does not support `onhashchange`, falls back to polling. + Backbone.History = function() { + this.handlers = []; + _.bindAll(this, 'checkUrl'); + }; + + // Cached regex for cleaning hashes. + var hashStrip = /^#*!?/; + + // Cached regex for detecting MSIE. + var isExplorer = /msie [\w.]+/; + + // Has the history handling already been started? + var historyStarted = false; + + // 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, either from the URL, + // the hash, or the override. + getFragment : function(fragment, forcePushState) { + if (fragment == null) { + if (this._hasPushState || forcePushState) { + fragment = window.location.pathname; + var search = window.location.search; + if (search) fragment += search; + if (fragment.indexOf(this.options.root) == 0) fragment = fragment.substr(this.options.root.length); + } else { + fragment = window.location.hash; + } + } + return fragment.replace(hashStrip, ''); + }, + + // Start the hash change handling, returning `true` if the current URL matches + // an existing route, and `false` otherwise. + start : function(options) { + + // Figure out the initial configuration. Do we need an iframe? + // Is pushState desired ... is it available? + if (historyStarted) throw new Error("Backbone.history has already been started"); + this.options = _.extend({}, {root: '/'}, this.options, options); + this._wantsPushState = !!this.options.pushState; + this._hasPushState = !!(this.options.pushState && window.history && window.history.pushState); + var fragment = this.getFragment(); + var docMode = document.documentMode; + var oldIE = (isExplorer.exec(navigator.userAgent.toLowerCase()) && (!docMode || docMode <= 7)); + if (oldIE) { + this.iframe = $('<iframe src="javascript:0" tabindex="-1" />').hide().appendTo('body')[0].contentWindow; + this.navigate(fragment); + } + + // Depending on whether we're using pushState or hashes, and whether + // 'onhashchange' is supported, determine how we check the URL state. + if (this._hasPushState) { + $(window).bind('popstate', this.checkUrl); + } else if ('onhashchange' in window && !oldIE) { + $(window).bind('hashchange', this.checkUrl); + } else { + setInterval(this.checkUrl, this.interval); + } + + // Determine if we need to change the base url, for a pushState link + // opened by a non-pushState browser. + this.fragment = fragment; + historyStarted = true; + var loc = window.location; + var atRoot = loc.pathname == this.options.root; + if (this._wantsPushState && !this._hasPushState && !atRoot) { + this.fragment = this.getFragment(null, true); + window.location = this.options.root + '#' + this.fragment; + } else if (this._wantsPushState && this._hasPushState && atRoot && loc.hash) { + this.fragment = loc.hash.replace(hashStrip, ''); + window.history.replaceState({}, document.title, loc.protocol + '//' + loc.host + this.options.root + this.fragment); + } + return this.loadUrl(); + }, + + // Add a route to be tested when the fragment changes. Routes added later may + // override previous routes. + route : function(route, callback) { + this.handlers.unshift({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(e) { + var current = this.getFragment(); + if (current == this.fragment && this.iframe) current = this.getFragment(this.iframe.location.hash); + if (current == this.fragment || current == decodeURIComponent(this.fragment)) return false; + if (this.iframe) this.navigate(current); + this.loadUrl() || this.loadUrl(window.location.hash); + }, + + // 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(fragmentOverride) { + var fragment = this.fragment = this.getFragment(fragmentOverride); + 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. + navigate : function(fragment, triggerRoute) { + var frag = (fragment || '').replace(hashStrip, ''); + if (this.fragment == frag || this.fragment == decodeURIComponent(frag)) return; + if (this._hasPushState) { + var loc = window.location; + if (frag.indexOf(this.options.root) != 0) frag = this.options.root + frag; + this.fragment = frag; + window.history.pushState({}, document.title, loc.protocol + '//' + loc.host + frag); + } else { + window.location.hash = this.fragment = frag; + if (this.iframe && (frag != this.getFragment(this.iframe.location.hash))) { + this.iframe.document.open().close(); + this.iframe.location.hash = frag; + } + } + if (triggerRoute) this.loadUrl(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.cid = _.uniqueId('view'); + this._configure(options || {}); + this._ensureElement(); + this.delegateEvents(); + this.initialize.apply(this, arguments); + }; + + // Element lookup, scoped to DOM elements within the current view. + // This should be prefered to global lookups, if you're dealing with + // a specific view. + var selectorDelegate = function(selector) { + return $(selector, this.el); + }; + + // Cached regex to split keys for `delegate`. + var eventSplitter = /^(\S+)\s*(.*)$/; + + // List of view options to be merged as properties. + var viewOptions = ['model', 'collection', 'el', 'id', 'attributes', 'className', 'tagName']; + + // 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 `selectorDelegate` function as the `$` property. + $ : selectorDelegate, + + // 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.escape('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 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('.delegateEvents' + this.cid); + for (var key in events) { + var method = this[events[key]]; + if (!method) throw new Error('Event "' + events[key] + '" does not exist'); + var match = key.match(eventSplitter); + var eventName = match[1], selector = match[2]; + method = _.bind(method, this); + eventName += '.delegateEvents' + this.cid; + if (selector === '') { + $(this.el).bind(eventName, method); + } else { + $(this.el).delegate(selector, eventName, method); + } + } + }, + + // Performs the initial configuration of a View with a set of options. + // Keys with special meaning *(model, collection, id, className)*, are + // attached directly to the view. + _configure : function(options) { + if (this.options) options = _.extend({}, this.options, options); + for (var i = 0, l = viewOptions.length; i < l; i++) { + var attr = viewOptions[i]; + if (options[attr]) this[attr] = options[attr]; + } + this.options = options; + }, + + // Ensure that the View has a DOM element to render into. + // If `this.el` is a string, pass it through `$()`, take the first + // matching element, and re-assign it to `el`. Otherwise, create + // an element from the `id`, `className` and `tagName` proeprties. + _ensureElement : function() { + if (!this.el) { + var attrs = this.attributes || {}; + if (this.id) attrs.id = this.id; + if (this.className) attrs['class'] = this.className; + this.el = this.make(this.tagName, attrs); + } else if (_.isString(this.el)) { + this.el = $(this.el).get(0); + } + } + + }); + + // The self-propagating extend function that Backbone classes use. + var extend = function (protoProps, classProps) { + var child = inherits(this, protoProps, classProps); + child.extend = this.extend; + return child; + }; + + // Set up inheritance for the model, collection, and view. + Backbone.Model.extend = Backbone.Collection.extend = + Backbone.Router.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 makes 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, options) { + var type = methodMap[method]; + + // Default JSON-request options. + var params = _.extend({ + type: type, + dataType: 'json', + processData: false + }, options); + + // Ensure that we have a URL. + if (!params.url) { + params.url = getUrl(model) || urlError(); + } + + // Ensure that we have the appropriate request data. + if (!params.data && model && (method == 'create' || method == 'update')) { + params.contentType = 'application/json'; + params.data = JSON.stringify(model.toJSON()); + } + + // 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 = params.data ? {model : params.data} : {}; + } + + // 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. + return $.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); }; + } + + // Inherit class (static) properties from parent. + _.extend(child, parent); + + // 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`. + 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)) return null; + return _.isFunction(object.url) ? object.url() : object.url; + }; + + // Throw an error when a URL is needed, and none is supplied. + var urlError = function() { + throw new Error('A "url" property or function must be specified'); + }; + + // Wrap an optional error callback with a fallback error event. + var wrapError = function(onError, model, options) { + return function(resp) { + if (onError) { + onError(model, resp, options); + } else { + model.trigger('error', model, resp, options); + } + }; + }; + + // Helper function to escape a string for HTML rendering. + var escapeHTML = function(string) { + return string.replace(/&(?!\w+;|#\d+;|#x[\da-f]+;)/gi, '&').replace(/</g, '<').replace(/>/g, '>').replace(/"/g, '"').replace(/'/g, ''').replace(/\//g,'/'); + }; + +}).call(this);
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