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Diffstat (limited to 'ecomp-portal-FE/client/bower_components/lodash/vendor/backbone/backbone.js')
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diff --git a/ecomp-portal-FE/client/bower_components/lodash/vendor/backbone/backbone.js b/ecomp-portal-FE/client/bower_components/lodash/vendor/backbone/backbone.js deleted file mode 100644 index 55ccb22b..00000000 --- a/ecomp-portal-FE/client/bower_components/lodash/vendor/backbone/backbone.js +++ /dev/null @@ -1,1920 +0,0 @@ -// Backbone.js 1.3.3 - -// (c) 2010-2016 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors -// Backbone may be freely distributed under the MIT license. -// For all details and documentation: -// http://backbonejs.org - -(function(factory) { - - // Establish the root object, `window` (`self`) in the browser, or `global` on the server. - // We use `self` instead of `window` for `WebWorker` support. - var root = (typeof self == 'object' && self.self === self && self) || - (typeof global == 'object' && global.global === global && global); - - // Set up Backbone appropriately for the environment. Start with AMD. - if (typeof define === 'function' && define.amd) { - define(['underscore', 'jquery', 'exports'], function(_, $, exports) { - // Export global even in AMD case in case this script is loaded with - // others that may still expect a global Backbone. - root.Backbone = factory(root, exports, _, $); - }); - - // Next for Node.js or CommonJS. jQuery may not be needed as a module. - } else if (typeof exports !== 'undefined') { - var _ = require('underscore'), $; - try { $ = require('jquery'); } catch (e) {} - factory(root, exports, _, $); - - // Finally, as a browser global. - } else { - root.Backbone = factory(root, {}, root._, (root.jQuery || root.Zepto || root.ender || root.$)); - } - -})(function(root, Backbone, _, $) { - - // Initial Setup - // ------------- - - // Save the previous value of the `Backbone` variable, so that it can be - // restored later on, if `noConflict` is used. - var previousBackbone = root.Backbone; - - // Create a local reference to a common array method we'll want to use later. - var slice = Array.prototype.slice; - - // Current version of the library. Keep in sync with `package.json`. - Backbone.VERSION = '1.3.3'; - - // For Backbone's purposes, jQuery, Zepto, Ender, or My Library (kidding) owns - // the `$` variable. - Backbone.$ = $; - - // 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 support legacy HTTP servers. Setting this option - // will fake `"PATCH"`, `"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 ... this 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; - - // Proxy Backbone class methods to Underscore functions, wrapping the model's - // `attributes` object or collection's `models` array behind the scenes. - // - // collection.filter(function(model) { return model.get('age') > 10 }); - // collection.each(this.addView); - // - // `Function#apply` can be slow so we use the method's arg count, if we know it. - var addMethod = function(length, method, attribute) { - switch (length) { - case 1: return function() { - return _[method](this[attribute]); - }; - case 2: return function(value) { - return _[method](this[attribute], value); - }; - case 3: return function(iteratee, context) { - return _[method](this[attribute], cb(iteratee, this), context); - }; - case 4: return function(iteratee, defaultVal, context) { - return _[method](this[attribute], cb(iteratee, this), defaultVal, context); - }; - default: return function() { - var args = slice.call(arguments); - args.unshift(this[attribute]); - return _[method].apply(_, args); - }; - } - }; - var addUnderscoreMethods = function(Class, methods, attribute) { - _.each(methods, function(length, method) { - if (_[method]) Class.prototype[method] = addMethod(length, method, attribute); - }); - }; - - // Support `collection.sortBy('attr')` and `collection.findWhere({id: 1})`. - var cb = function(iteratee, instance) { - if (_.isFunction(iteratee)) return iteratee; - if (_.isObject(iteratee) && !instance._isModel(iteratee)) return modelMatcher(iteratee); - if (_.isString(iteratee)) return function(model) { return model.get(iteratee); }; - return iteratee; - }; - var modelMatcher = function(attrs) { - var matcher = _.matches(attrs); - return function(model) { - return matcher(model.attributes); - }; - }; - - // Backbone.Events - // --------------- - - // A module that can be mixed in to *any object* in order to provide it with - // a custom event channel. You may bind a callback to an event with `on` or - // remove with `off`; `trigger`-ing an event fires all callbacks in - // succession. - // - // var object = {}; - // _.extend(object, Backbone.Events); - // object.on('expand', function(){ alert('expanded'); }); - // object.trigger('expand'); - // - var Events = Backbone.Events = {}; - - // Regular expression used to split event strings. - var eventSplitter = /\s+/; - - // Iterates over the standard `event, callback` (as well as the fancy multiple - // space-separated events `"change blur", callback` and jQuery-style event - // maps `{event: callback}`). - var eventsApi = function(iteratee, events, name, callback, opts) { - var i = 0, names; - if (name && typeof name === 'object') { - // Handle event maps. - if (callback !== void 0 && 'context' in opts && opts.context === void 0) opts.context = callback; - for (names = _.keys(name); i < names.length ; i++) { - events = eventsApi(iteratee, events, names[i], name[names[i]], opts); - } - } else if (name && eventSplitter.test(name)) { - // Handle space-separated event names by delegating them individually. - for (names = name.split(eventSplitter); i < names.length; i++) { - events = iteratee(events, names[i], callback, opts); - } - } else { - // Finally, standard events. - events = iteratee(events, name, callback, opts); - } - return events; - }; - - // Bind an event to a `callback` function. Passing `"all"` will bind - // the callback to all events fired. - Events.on = function(name, callback, context) { - return internalOn(this, name, callback, context); - }; - - // Guard the `listening` argument from the public API. - var internalOn = function(obj, name, callback, context, listening) { - obj._events = eventsApi(onApi, obj._events || {}, name, callback, { - context: context, - ctx: obj, - listening: listening - }); - - if (listening) { - var listeners = obj._listeners || (obj._listeners = {}); - listeners[listening.id] = listening; - } - - return obj; - }; - - // Inversion-of-control versions of `on`. Tell *this* object to listen to - // an event in another object... keeping track of what it's listening to - // for easier unbinding later. - Events.listenTo = function(obj, name, callback) { - if (!obj) return this; - var id = obj._listenId || (obj._listenId = _.uniqueId('l')); - var listeningTo = this._listeningTo || (this._listeningTo = {}); - var listening = listeningTo[id]; - - // This object is not listening to any other events on `obj` yet. - // Setup the necessary references to track the listening callbacks. - if (!listening) { - var thisId = this._listenId || (this._listenId = _.uniqueId('l')); - listening = listeningTo[id] = {obj: obj, objId: id, id: thisId, listeningTo: listeningTo, count: 0}; - } - - // Bind callbacks on obj, and keep track of them on listening. - internalOn(obj, name, callback, this, listening); - return this; - }; - - // The reducing API that adds a callback to the `events` object. - var onApi = function(events, name, callback, options) { - if (callback) { - var handlers = events[name] || (events[name] = []); - var context = options.context, ctx = options.ctx, listening = options.listening; - if (listening) listening.count++; - - handlers.push({callback: callback, context: context, ctx: context || ctx, listening: listening}); - } - return events; - }; - - // Remove one or many callbacks. If `context` is null, removes all - // callbacks with that function. If `callback` is null, removes all - // callbacks for the event. If `name` is null, removes all bound - // callbacks for all events. - Events.off = function(name, callback, context) { - if (!this._events) return this; - this._events = eventsApi(offApi, this._events, name, callback, { - context: context, - listeners: this._listeners - }); - return this; - }; - - // Tell this object to stop listening to either specific events ... or - // to every object it's currently listening to. - Events.stopListening = function(obj, name, callback) { - var listeningTo = this._listeningTo; - if (!listeningTo) return this; - - var ids = obj ? [obj._listenId] : _.keys(listeningTo); - - for (var i = 0; i < ids.length; i++) { - var listening = listeningTo[ids[i]]; - - // If listening doesn't exist, this object is not currently - // listening to obj. Break out early. - if (!listening) break; - - listening.obj.off(name, callback, this); - } - - return this; - }; - - // The reducing API that removes a callback from the `events` object. - var offApi = function(events, name, callback, options) { - if (!events) return; - - var i = 0, listening; - var context = options.context, listeners = options.listeners; - - // Delete all events listeners and "drop" events. - if (!name && !callback && !context) { - var ids = _.keys(listeners); - for (; i < ids.length; i++) { - listening = listeners[ids[i]]; - delete listeners[listening.id]; - delete listening.listeningTo[listening.objId]; - } - return; - } - - var names = name ? [name] : _.keys(events); - for (; i < names.length; i++) { - name = names[i]; - var handlers = events[name]; - - // Bail out if there are no events stored. - if (!handlers) break; - - // Replace events if there are any remaining. Otherwise, clean up. - var remaining = []; - for (var j = 0; j < handlers.length; j++) { - var handler = handlers[j]; - if ( - callback && callback !== handler.callback && - callback !== handler.callback._callback || - context && context !== handler.context - ) { - remaining.push(handler); - } else { - listening = handler.listening; - if (listening && --listening.count === 0) { - delete listeners[listening.id]; - delete listening.listeningTo[listening.objId]; - } - } - } - - // Update tail event if the list has any events. Otherwise, clean up. - if (remaining.length) { - events[name] = remaining; - } else { - delete events[name]; - } - } - return events; - }; - - // Bind an event to only be triggered a single time. After the first time - // the callback is invoked, its listener will be removed. If multiple events - // are passed in using the space-separated syntax, the handler will fire - // once for each event, not once for a combination of all events. - Events.once = function(name, callback, context) { - // Map the event into a `{event: once}` object. - var events = eventsApi(onceMap, {}, name, callback, _.bind(this.off, this)); - if (typeof name === 'string' && context == null) callback = void 0; - return this.on(events, callback, context); - }; - - // Inversion-of-control versions of `once`. - Events.listenToOnce = function(obj, name, callback) { - // Map the event into a `{event: once}` object. - var events = eventsApi(onceMap, {}, name, callback, _.bind(this.stopListening, this, obj)); - return this.listenTo(obj, events); - }; - - // Reduces the event callbacks into a map of `{event: onceWrapper}`. - // `offer` unbinds the `onceWrapper` after it has been called. - var onceMap = function(map, name, callback, offer) { - if (callback) { - var once = map[name] = _.once(function() { - offer(name, once); - callback.apply(this, arguments); - }); - once._callback = callback; - } - return map; - }; - - // Trigger one or many events, firing all bound callbacks. Callbacks are - // passed the same arguments as `trigger` is, apart from the event name - // (unless you're listening on `"all"`, which will cause your callback to - // receive the true name of the event as the first argument). - Events.trigger = function(name) { - if (!this._events) return this; - - var length = Math.max(0, arguments.length - 1); - var args = Array(length); - for (var i = 0; i < length; i++) args[i] = arguments[i + 1]; - - eventsApi(triggerApi, this._events, name, void 0, args); - return this; - }; - - // Handles triggering the appropriate event callbacks. - var triggerApi = function(objEvents, name, callback, args) { - if (objEvents) { - var events = objEvents[name]; - var allEvents = objEvents.all; - if (events && allEvents) allEvents = allEvents.slice(); - if (events) triggerEvents(events, args); - if (allEvents) triggerEvents(allEvents, [name].concat(args)); - } - return objEvents; - }; - - // A difficult-to-believe, but optimized internal dispatch function for - // triggering events. Tries to keep the usual cases speedy (most internal - // Backbone events have 3 arguments). - var triggerEvents = function(events, args) { - var ev, i = -1, l = events.length, a1 = args[0], a2 = args[1], a3 = args[2]; - switch (args.length) { - case 0: while (++i < l) (ev = events[i]).callback.call(ev.ctx); return; - case 1: while (++i < l) (ev = events[i]).callback.call(ev.ctx, a1); return; - case 2: while (++i < l) (ev = events[i]).callback.call(ev.ctx, a1, a2); return; - case 3: while (++i < l) (ev = events[i]).callback.call(ev.ctx, a1, a2, a3); return; - default: while (++i < l) (ev = events[i]).callback.apply(ev.ctx, args); return; - } - }; - - // Aliases for backwards compatibility. - Events.bind = Events.on; - Events.unbind = Events.off; - - // Allow the `Backbone` object to serve as a global event bus, for folks who - // want global "pubsub" in a convenient place. - _.extend(Backbone, Events); - - // Backbone.Model - // -------------- - - // Backbone **Models** are the basic data object in the framework -- - // frequently representing a row in a table in a database on your server. - // A discrete chunk of data and a bunch of useful, related methods for - // performing computations and transformations on that data. - - // Create a new model with the specified attributes. A client id (`cid`) - // is automatically generated and assigned for you. - var Model = Backbone.Model = function(attributes, options) { - var attrs = attributes || {}; - options || (options = {}); - this.cid = _.uniqueId(this.cidPrefix); - this.attributes = {}; - if (options.collection) this.collection = options.collection; - if (options.parse) attrs = this.parse(attrs, options) || {}; - var defaults = _.result(this, 'defaults'); - attrs = _.defaults(_.extend({}, defaults, attrs), defaults); - this.set(attrs, options); - this.changed = {}; - this.initialize.apply(this, arguments); - }; - - // Attach all inheritable methods to the Model prototype. - _.extend(Model.prototype, Events, { - - // A hash of attributes whose current and previous value differ. - changed: null, - - // The value returned during the last failed validation. - validationError: null, - - // The default name for the JSON `id` attribute is `"id"`. MongoDB and - // CouchDB users may want to set this to `"_id"`. - idAttribute: 'id', - - // The prefix is used to create the client id which is used to identify models locally. - // You may want to override this if you're experiencing name clashes with model ids. - cidPrefix: 'c', - - // 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(options) { - return _.clone(this.attributes); - }, - - // Proxy `Backbone.sync` by default -- but override this if you need - // custom syncing semantics for *this* particular model. - sync: function() { - return Backbone.sync.apply(this, arguments); - }, - - // Get the value of an attribute. - get: function(attr) { - return this.attributes[attr]; - }, - - // Get the HTML-escaped value of an attribute. - escape: function(attr) { - return _.escape(this.get(attr)); - }, - - // Returns `true` if the attribute contains a value that is not null - // or undefined. - has: function(attr) { - return this.get(attr) != null; - }, - - // Special-cased proxy to underscore's `_.matches` method. - matches: function(attrs) { - return !!_.iteratee(attrs, this)(this.attributes); - }, - - // Set a hash of model attributes on the object, firing `"change"`. This is - // the core primitive operation of a model, updating the data and notifying - // anyone who needs to know about the change in state. The heart of the beast. - set: function(key, val, options) { - if (key == null) return this; - - // Handle both `"key", value` and `{key: value}` -style arguments. - var attrs; - if (typeof key === 'object') { - attrs = key; - options = val; - } else { - (attrs = {})[key] = val; - } - - options || (options = {}); - - // Run validation. - if (!this._validate(attrs, options)) return false; - - // Extract attributes and options. - var unset = options.unset; - var silent = options.silent; - var changes = []; - var changing = this._changing; - this._changing = true; - - if (!changing) { - this._previousAttributes = _.clone(this.attributes); - this.changed = {}; - } - - var current = this.attributes; - var changed = this.changed; - var prev = this._previousAttributes; - - // For each `set` attribute, update or delete the current value. - for (var attr in attrs) { - val = attrs[attr]; - if (!_.isEqual(current[attr], val)) changes.push(attr); - if (!_.isEqual(prev[attr], val)) { - changed[attr] = val; - } else { - delete changed[attr]; - } - unset ? delete current[attr] : current[attr] = val; - } - - // Update the `id`. - if (this.idAttribute in attrs) this.id = this.get(this.idAttribute); - - // Trigger all relevant attribute changes. - if (!silent) { - if (changes.length) this._pending = options; - for (var i = 0; i < changes.length; i++) { - this.trigger('change:' + changes[i], this, current[changes[i]], options); - } - } - - // You might be wondering why there's a `while` loop here. Changes can - // be recursively nested within `"change"` events. - if (changing) return this; - if (!silent) { - while (this._pending) { - options = this._pending; - this._pending = false; - this.trigger('change', this, options); - } - } - this._pending = false; - this._changing = false; - return this; - }, - - // Remove an attribute from the model, firing `"change"`. `unset` is a noop - // if the attribute doesn't exist. - unset: function(attr, options) { - return this.set(attr, void 0, _.extend({}, options, {unset: true})); - }, - - // Clear all attributes on the model, firing `"change"`. - clear: function(options) { - var attrs = {}; - for (var key in this.attributes) attrs[key] = void 0; - return this.set(attrs, _.extend({}, options, {unset: true})); - }, - - // 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 == null) return !_.isEmpty(this.changed); - return _.has(this.changed, attr); - }, - - // 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. Unset attributes will be set to undefined. - // You can also pass an attributes object to diff against the model, - // determining if there *would be* a change. - changedAttributes: function(diff) { - if (!diff) return this.hasChanged() ? _.clone(this.changed) : false; - var old = this._changing ? this._previousAttributes : this.attributes; - var changed = {}; - for (var attr in diff) { - var val = diff[attr]; - if (_.isEqual(old[attr], val)) continue; - changed[attr] = val; - } - return _.size(changed) ? changed : false; - }, - - // Get the previous value of an attribute, recorded at the time the last - // `"change"` event was fired. - previous: function(attr) { - if (attr == null || !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); - }, - - // Fetch the model from the server, merging the response with the model's - // local attributes. Any changed attributes will trigger a "change" event. - fetch: function(options) { - options = _.extend({parse: true}, options); - var model = this; - var success = options.success; - options.success = function(resp) { - var serverAttrs = options.parse ? model.parse(resp, options) : resp; - if (!model.set(serverAttrs, options)) return false; - if (success) success.call(options.context, model, resp, options); - model.trigger('sync', model, resp, options); - }; - wrapError(this, options); - return this.sync('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(key, val, options) { - // Handle both `"key", value` and `{key: value}` -style arguments. - var attrs; - if (key == null || typeof key === 'object') { - attrs = key; - options = val; - } else { - (attrs = {})[key] = val; - } - - options = _.extend({validate: true, parse: true}, options); - var wait = options.wait; - - // If we're not waiting and attributes exist, save acts as - // `set(attr).save(null, opts)` with validation. Otherwise, check if - // the model will be valid when the attributes, if any, are set. - if (attrs && !wait) { - if (!this.set(attrs, options)) return false; - } else if (!this._validate(attrs, options)) { - return false; - } - - // After a successful server-side save, the client is (optionally) - // updated with the server-side state. - var model = this; - var success = options.success; - var attributes = this.attributes; - options.success = function(resp) { - // Ensure attributes are restored during synchronous saves. - model.attributes = attributes; - var serverAttrs = options.parse ? model.parse(resp, options) : resp; - if (wait) serverAttrs = _.extend({}, attrs, serverAttrs); - if (serverAttrs && !model.set(serverAttrs, options)) return false; - if (success) success.call(options.context, model, resp, options); - model.trigger('sync', model, resp, options); - }; - wrapError(this, options); - - // Set temporary attributes if `{wait: true}` to properly find new ids. - if (attrs && wait) this.attributes = _.extend({}, attributes, attrs); - - var method = this.isNew() ? 'create' : (options.patch ? 'patch' : 'update'); - if (method === 'patch' && !options.attrs) options.attrs = attrs; - var xhr = this.sync(method, this, options); - - // Restore attributes. - this.attributes = attributes; - - return xhr; - }, - - // Destroy this model on the server if it was already persisted. - // Optimistically removes the model from its collection, if it has one. - // If `wait: true` is passed, waits for the server to respond before removal. - destroy: function(options) { - options = options ? _.clone(options) : {}; - var model = this; - var success = options.success; - var wait = options.wait; - - var destroy = function() { - model.stopListening(); - model.trigger('destroy', model, model.collection, options); - }; - - options.success = function(resp) { - if (wait) destroy(); - if (success) success.call(options.context, model, resp, options); - if (!model.isNew()) model.trigger('sync', model, resp, options); - }; - - var xhr = false; - if (this.isNew()) { - _.defer(options.success); - } else { - wrapError(this, options); - xhr = this.sync('delete', this, options); - } - if (!wait) destroy(); - return xhr; - }, - - // 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 = - _.result(this, 'urlRoot') || - _.result(this.collection, 'url') || - urlError(); - if (this.isNew()) return base; - var id = this.get(this.idAttribute); - return base.replace(/[^\/]$/, '$&/') + encodeURIComponent(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, options) { - return resp; - }, - - // Create a new model with identical attributes to this one. - clone: function() { - return new this.constructor(this.attributes); - }, - - // A model is new if it has never been saved to the server, and lacks an id. - isNew: function() { - return !this.has(this.idAttribute); - }, - - // Check if the model is currently in a valid state. - isValid: function(options) { - return this._validate({}, _.extend({}, options, {validate: true})); - }, - - // Run validation against the next complete set of model attributes, - // returning `true` if all is well. Otherwise, fire an `"invalid"` event. - _validate: function(attrs, options) { - if (!options.validate || !this.validate) return true; - attrs = _.extend({}, this.attributes, attrs); - var error = this.validationError = this.validate(attrs, options) || null; - if (!error) return true; - this.trigger('invalid', this, error, _.extend(options, {validationError: error})); - return false; - } - - }); - - // Underscore methods that we want to implement on the Model, mapped to the - // number of arguments they take. - var modelMethods = {keys: 1, values: 1, pairs: 1, invert: 1, pick: 0, - omit: 0, chain: 1, isEmpty: 1}; - - // Mix in each Underscore method as a proxy to `Model#attributes`. - addUnderscoreMethods(Model, modelMethods, 'attributes'); - - // Backbone.Collection - // ------------------- - - // If models tend to represent a single row of data, a Backbone Collection is - // more analogous to a table full of data ... or a small slice or page of that - // table, or a collection of rows that belong together for a particular reason - // -- all of the messages in this particular folder, all of the documents - // belonging to this particular author, and so on. Collections maintain - // indexes of their models, both in order, and for lookup by `id`. - - // Create a new **Collection**, perhaps to contain a specific type of `model`. - // If a `comparator` is specified, the Collection will maintain - // its models in sort order, as they're added and removed. - var Collection = Backbone.Collection = function(models, options) { - options || (options = {}); - if (options.model) this.model = options.model; - if (options.comparator !== void 0) this.comparator = options.comparator; - this._reset(); - this.initialize.apply(this, arguments); - if (models) this.reset(models, _.extend({silent: true}, options)); - }; - - // Default options for `Collection#set`. - var setOptions = {add: true, remove: true, merge: true}; - var addOptions = {add: true, remove: false}; - - // Splices `insert` into `array` at index `at`. - var splice = function(array, insert, at) { - at = Math.min(Math.max(at, 0), array.length); - var tail = Array(array.length - at); - var length = insert.length; - var i; - for (i = 0; i < tail.length; i++) tail[i] = array[i + at]; - for (i = 0; i < length; i++) array[i + at] = insert[i]; - for (i = 0; i < tail.length; i++) array[i + length + at] = tail[i]; - }; - - // Define the Collection's inheritable methods. - _.extend(Collection.prototype, Events, { - - // The default model for a collection is just a **Backbone.Model**. - // This should be overridden in most cases. - model: 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(options) { - return this.map(function(model) { return model.toJSON(options); }); - }, - - // Proxy `Backbone.sync` by default. - sync: function() { - return Backbone.sync.apply(this, arguments); - }, - - // Add a model, or list of models to the set. `models` may be Backbone - // Models or raw JavaScript objects to be converted to Models, or any - // combination of the two. - add: function(models, options) { - return this.set(models, _.extend({merge: false}, options, addOptions)); - }, - - // Remove a model, or a list of models from the set. - remove: function(models, options) { - options = _.extend({}, options); - var singular = !_.isArray(models); - models = singular ? [models] : models.slice(); - var removed = this._removeModels(models, options); - if (!options.silent && removed.length) { - options.changes = {added: [], merged: [], removed: removed}; - this.trigger('update', this, options); - } - return singular ? removed[0] : removed; - }, - - // Update a collection by `set`-ing a new list of models, adding new ones, - // removing models that are no longer present, and merging models that - // already exist in the collection, as necessary. Similar to **Model#set**, - // the core operation for updating the data contained by the collection. - set: function(models, options) { - if (models == null) return; - - options = _.extend({}, setOptions, options); - if (options.parse && !this._isModel(models)) { - models = this.parse(models, options) || []; - } - - var singular = !_.isArray(models); - models = singular ? [models] : models.slice(); - - var at = options.at; - if (at != null) at = +at; - if (at > this.length) at = this.length; - if (at < 0) at += this.length + 1; - - var set = []; - var toAdd = []; - var toMerge = []; - var toRemove = []; - var modelMap = {}; - - var add = options.add; - var merge = options.merge; - var remove = options.remove; - - var sort = false; - var sortable = this.comparator && at == null && options.sort !== false; - var sortAttr = _.isString(this.comparator) ? this.comparator : null; - - // Turn bare objects into model references, and prevent invalid models - // from being added. - var model, i; - for (i = 0; i < models.length; i++) { - model = models[i]; - - // If a duplicate is found, prevent it from being added and - // optionally merge it into the existing model. - var existing = this.get(model); - if (existing) { - if (merge && model !== existing) { - var attrs = this._isModel(model) ? model.attributes : model; - if (options.parse) attrs = existing.parse(attrs, options); - existing.set(attrs, options); - toMerge.push(existing); - if (sortable && !sort) sort = existing.hasChanged(sortAttr); - } - if (!modelMap[existing.cid]) { - modelMap[existing.cid] = true; - set.push(existing); - } - models[i] = existing; - - // If this is a new, valid model, push it to the `toAdd` list. - } else if (add) { - model = models[i] = this._prepareModel(model, options); - if (model) { - toAdd.push(model); - this._addReference(model, options); - modelMap[model.cid] = true; - set.push(model); - } - } - } - - // Remove stale models. - if (remove) { - for (i = 0; i < this.length; i++) { - model = this.models[i]; - if (!modelMap[model.cid]) toRemove.push(model); - } - if (toRemove.length) this._removeModels(toRemove, options); - } - - // See if sorting is needed, update `length` and splice in new models. - var orderChanged = false; - var replace = !sortable && add && remove; - if (set.length && replace) { - orderChanged = this.length !== set.length || _.some(this.models, function(m, index) { - return m !== set[index]; - }); - this.models.length = 0; - splice(this.models, set, 0); - this.length = this.models.length; - } else if (toAdd.length) { - if (sortable) sort = true; - splice(this.models, toAdd, at == null ? this.length : at); - this.length = this.models.length; - } - - // Silently sort the collection if appropriate. - if (sort) this.sort({silent: true}); - - // Unless silenced, it's time to fire all appropriate add/sort/update events. - if (!options.silent) { - for (i = 0; i < toAdd.length; i++) { - if (at != null) options.index = at + i; - model = toAdd[i]; - model.trigger('add', model, this, options); - } - if (sort || orderChanged) this.trigger('sort', this, options); - if (toAdd.length || toRemove.length || toMerge.length) { - options.changes = { - added: toAdd, - removed: toRemove, - merged: toMerge - }; - this.trigger('update', this, options); - } - } - - // Return the added (or merged) model (or models). - return singular ? models[0] : models; - }, - - // 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 granular `add` or `remove` events. Fires `reset` when finished. - // Useful for bulk operations and optimizations. - reset: function(models, options) { - options = options ? _.clone(options) : {}; - for (var i = 0; i < this.models.length; i++) { - this._removeReference(this.models[i], options); - } - options.previousModels = this.models; - this._reset(); - models = this.add(models, _.extend({silent: true}, options)); - if (!options.silent) this.trigger('reset', this, options); - return models; - }, - - // Add a model to the end of the collection. - push: function(model, options) { - return this.add(model, _.extend({at: this.length}, options)); - }, - - // Remove a model from the end of the collection. - pop: function(options) { - var model = this.at(this.length - 1); - return this.remove(model, options); - }, - - // Add a model to the beginning of the collection. - unshift: function(model, options) { - return this.add(model, _.extend({at: 0}, options)); - }, - - // Remove a model from the beginning of the collection. - shift: function(options) { - var model = this.at(0); - return this.remove(model, options); - }, - - // Slice out a sub-array of models from the collection. - slice: function() { - return slice.apply(this.models, arguments); - }, - - // Get a model from the set by id, cid, model object with id or cid - // properties, or an attributes object that is transformed through modelId. - get: function(obj) { - if (obj == null) return void 0; - return this._byId[obj] || - this._byId[this.modelId(obj.attributes || obj)] || - obj.cid && this._byId[obj.cid]; - }, - - // Returns `true` if the model is in the collection. - has: function(obj) { - return this.get(obj) != null; - }, - - // Get the model at the given index. - at: function(index) { - if (index < 0) index += this.length; - return this.models[index]; - }, - - // Return models with matching attributes. Useful for simple cases of - // `filter`. - where: function(attrs, first) { - return this[first ? 'find' : 'filter'](attrs); - }, - - // Return the first model with matching attributes. Useful for simple cases - // of `find`. - findWhere: function(attrs) { - return this.where(attrs, true); - }, - - // 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) { - var comparator = this.comparator; - if (!comparator) throw new Error('Cannot sort a set without a comparator'); - options || (options = {}); - - var length = comparator.length; - if (_.isFunction(comparator)) comparator = _.bind(comparator, this); - - // Run sort based on type of `comparator`. - if (length === 1 || _.isString(comparator)) { - this.models = this.sortBy(comparator); - } else { - this.models.sort(comparator); - } - if (!options.silent) this.trigger('sort', this, options); - return this; - }, - - // Pluck an attribute from each model in the collection. - pluck: function(attr) { - return this.map(attr + ''); - }, - - // Fetch the default set of models for this collection, resetting the - // collection when they arrive. If `reset: true` is passed, the response - // data will be passed through the `reset` method instead of `set`. - fetch: function(options) { - options = _.extend({parse: true}, options); - var success = options.success; - var collection = this; - options.success = function(resp) { - var method = options.reset ? 'reset' : 'set'; - collection[method](resp, options); - if (success) success.call(options.context, collection, resp, options); - collection.trigger('sync', collection, resp, options); - }; - wrapError(this, options); - return this.sync('read', this, options); - }, - - // Create a new instance of a model in this collection. Add the model to the - // collection immediately, unless `wait: true` is passed, in which case we - // wait for the server to agree. - create: function(model, options) { - options = options ? _.clone(options) : {}; - var wait = options.wait; - model = this._prepareModel(model, options); - if (!model) return false; - if (!wait) this.add(model, options); - var collection = this; - var success = options.success; - options.success = function(m, resp, callbackOpts) { - if (wait) collection.add(m, callbackOpts); - if (success) success.call(callbackOpts.context, m, resp, callbackOpts); - }; - 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, options) { - return resp; - }, - - // Create a new collection with an identical list of models as this one. - clone: function() { - return new this.constructor(this.models, { - model: this.model, - comparator: this.comparator - }); - }, - - // Define how to uniquely identify models in the collection. - modelId: function(attrs) { - return attrs[this.model.prototype.idAttribute || 'id']; - }, - - // Private method to reset all internal state. Called when the collection - // is first initialized or reset. - _reset: function() { - this.length = 0; - this.models = []; - this._byId = {}; - }, - - // Prepare a hash of attributes (or other model) to be added to this - // collection. - _prepareModel: function(attrs, options) { - if (this._isModel(attrs)) { - if (!attrs.collection) attrs.collection = this; - return attrs; - } - options = options ? _.clone(options) : {}; - options.collection = this; - var model = new this.model(attrs, options); - if (!model.validationError) return model; - this.trigger('invalid', this, model.validationError, options); - return false; - }, - - // Internal method called by both remove and set. - _removeModels: function(models, options) { - var removed = []; - for (var i = 0; i < models.length; i++) { - var model = this.get(models[i]); - if (!model) continue; - - var index = this.indexOf(model); - this.models.splice(index, 1); - this.length--; - - // Remove references before triggering 'remove' event to prevent an - // infinite loop. #3693 - delete this._byId[model.cid]; - var id = this.modelId(model.attributes); - if (id != null) delete this._byId[id]; - - if (!options.silent) { - options.index = index; - model.trigger('remove', model, this, options); - } - - removed.push(model); - this._removeReference(model, options); - } - return removed; - }, - - // Method for checking whether an object should be considered a model for - // the purposes of adding to the collection. - _isModel: function(model) { - return model instanceof Model; - }, - - // Internal method to create a model's ties to a collection. - _addReference: function(model, options) { - this._byId[model.cid] = model; - var id = this.modelId(model.attributes); - if (id != null) this._byId[id] = model; - model.on('all', this._onModelEvent, this); - }, - - // Internal method to sever a model's ties to a collection. - _removeReference: function(model, options) { - delete this._byId[model.cid]; - var id = this.modelId(model.attributes); - if (id != null) delete this._byId[id]; - if (this === model.collection) delete model.collection; - model.off('all', this._onModelEvent, this); - }, - - // 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(event, model, collection, options) { - if (model) { - if ((event === 'add' || event === 'remove') && collection !== this) return; - if (event === 'destroy') this.remove(model, options); - if (event === 'change') { - var prevId = this.modelId(model.previousAttributes()); - var id = this.modelId(model.attributes); - if (prevId !== id) { - if (prevId != null) delete this._byId[prevId]; - if (id != null) this._byId[id] = model; - } - } - } - this.trigger.apply(this, arguments); - } - - }); - - // Underscore methods that we want to implement on the Collection. - // 90% of the core usefulness of Backbone Collections is actually implemented - // right here: - var collectionMethods = {forEach: 3, each: 3, map: 3, collect: 3, reduce: 0, - foldl: 0, inject: 0, reduceRight: 0, foldr: 0, find: 3, detect: 3, filter: 3, - select: 3, reject: 3, every: 3, all: 3, some: 3, any: 3, include: 3, includes: 3, - contains: 3, invoke: 0, max: 3, min: 3, toArray: 1, size: 1, first: 3, - head: 3, take: 3, initial: 3, rest: 3, tail: 3, drop: 3, last: 3, - without: 0, difference: 0, indexOf: 3, shuffle: 1, lastIndexOf: 3, - isEmpty: 1, chain: 1, sample: 3, partition: 3, groupBy: 3, countBy: 3, - sortBy: 3, indexBy: 3, findIndex: 3, findLastIndex: 3}; - - // Mix in each Underscore method as a proxy to `Collection#models`. - addUnderscoreMethods(Collection, collectionMethods, 'models'); - - // Backbone.View - // ------------- - - // Backbone Views are almost more convention than they are actual code. A View - // is simply a JavaScript object that represents a logical chunk of UI in the - // DOM. This might be a single item, an entire list, a sidebar or panel, or - // even the surrounding frame which wraps your whole app. Defining a chunk of - // UI as a **View** allows you to define your DOM events declaratively, without - // having to worry about render order ... and makes it easy for the view to - // react to specific changes in the state of your models. - - // Creating a Backbone.View creates its initial element outside of the DOM, - // if an existing element is not provided... - var View = Backbone.View = function(options) { - this.cid = _.uniqueId('view'); - _.extend(this, _.pick(options, viewOptions)); - this._ensureElement(); - this.initialize.apply(this, arguments); - }; - - // Cached regex to split keys for `delegate`. - var delegateEventSplitter = /^(\S+)\s*(.*)$/; - - // List of view options to be set as properties. - var viewOptions = ['model', 'collection', 'el', 'id', 'attributes', 'className', 'tagName', 'events']; - - // Set up all inheritable **Backbone.View** properties and methods. - _.extend(View.prototype, Events, { - - // The default `tagName` of a View's element is `"div"`. - tagName: 'div', - - // jQuery delegate for element lookup, scoped to DOM elements within the - // current view. This should be preferred to global lookups where possible. - $: function(selector) { - return this.$el.find(selector); - }, - - // 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 by taking the element out of the DOM, and removing any - // applicable Backbone.Events listeners. - remove: function() { - this._removeElement(); - this.stopListening(); - return this; - }, - - // Remove this view's element from the document and all event listeners - // attached to it. Exposed for subclasses using an alternative DOM - // manipulation API. - _removeElement: function() { - this.$el.remove(); - }, - - // Change the view's element (`this.el` property) and re-delegate the - // view's events on the new element. - setElement: function(element) { - this.undelegateEvents(); - this._setElement(element); - this.delegateEvents(); - return this; - }, - - // Creates the `this.el` and `this.$el` references for this view using the - // given `el`. `el` can be a CSS selector or an HTML string, a jQuery - // context or an element. Subclasses can override this to utilize an - // alternative DOM manipulation API and are only required to set the - // `this.el` property. - _setElement: function(el) { - this.$el = el instanceof Backbone.$ ? el : Backbone.$(el); - this.el = this.$el[0]; - }, - - // Set callbacks, where `this.events` is a hash of - // - // *{"event selector": "callback"}* - // - // { - // 'mousedown .title': 'edit', - // 'click .button': 'save', - // 'click .open': function(e) { ... } - // } - // - // 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`. - delegateEvents: function(events) { - events || (events = _.result(this, 'events')); - if (!events) return this; - this.undelegateEvents(); - for (var key in events) { - var method = events[key]; - if (!_.isFunction(method)) method = this[method]; - if (!method) continue; - var match = key.match(delegateEventSplitter); - this.delegate(match[1], match[2], _.bind(method, this)); - } - return this; - }, - - // Add a single event listener to the view's element (or a child element - // using `selector`). This only works for delegate-able events: not `focus`, - // `blur`, and not `change`, `submit`, and `reset` in Internet Explorer. - delegate: function(eventName, selector, listener) { - this.$el.on(eventName + '.delegateEvents' + this.cid, selector, listener); - return this; - }, - - // Clears all callbacks previously bound to the view by `delegateEvents`. - // You usually don't need to use this, but may wish to if you have multiple - // Backbone views attached to the same DOM element. - undelegateEvents: function() { - if (this.$el) this.$el.off('.delegateEvents' + this.cid); - return this; - }, - - // A finer-grained `undelegateEvents` for removing a single delegated event. - // `selector` and `listener` are both optional. - undelegate: function(eventName, selector, listener) { - this.$el.off(eventName + '.delegateEvents' + this.cid, selector, listener); - return this; - }, - - // Produces a DOM element to be assigned to your view. Exposed for - // subclasses using an alternative DOM manipulation API. - _createElement: function(tagName) { - return document.createElement(tagName); - }, - - // Ensure that the View has a DOM element to render into. - // If `this.el` is a string, pass it through `$()`, take the first - // matching element, and re-assign it to `el`. Otherwise, create - // an element from the `id`, `className` and `tagName` properties. - _ensureElement: function() { - if (!this.el) { - var attrs = _.extend({}, _.result(this, 'attributes')); - if (this.id) attrs.id = _.result(this, 'id'); - if (this.className) attrs['class'] = _.result(this, 'className'); - this.setElement(this._createElement(_.result(this, 'tagName'))); - this._setAttributes(attrs); - } else { - this.setElement(_.result(this, 'el')); - } - }, - - // Set attributes from a hash on this view's element. Exposed for - // subclasses using an alternative DOM manipulation API. - _setAttributes: function(attributes) { - this.$el.attr(attributes); - } - - }); - - // 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, 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 options, unless specified. - _.defaults(options || (options = {}), { - emulateHTTP: Backbone.emulateHTTP, - emulateJSON: Backbone.emulateJSON - }); - - // Default JSON-request options. - var params = {type: type, dataType: 'json'}; - - // Ensure that we have a URL. - if (!options.url) { - params.url = _.result(model, 'url') || urlError(); - } - - // Ensure that we have the appropriate request data. - if (options.data == null && model && (method === 'create' || method === 'update' || method === 'patch')) { - params.contentType = 'application/json'; - params.data = JSON.stringify(options.attrs || model.toJSON(options)); - } - - // For older servers, emulate JSON by encoding the request into an HTML-form. - if (options.emulateJSON) { - params.contentType = 'application/x-www-form-urlencoded'; - 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 (options.emulateHTTP && (type === 'PUT' || type === 'DELETE' || type === 'PATCH')) { - params.type = 'POST'; - if (options.emulateJSON) params.data._method = type; - var beforeSend = options.beforeSend; - options.beforeSend = function(xhr) { - xhr.setRequestHeader('X-HTTP-Method-Override', type); - if (beforeSend) return beforeSend.apply(this, arguments); - }; - } - - // Don't process data on a non-GET request. - if (params.type !== 'GET' && !options.emulateJSON) { - params.processData = false; - } - - // Pass along `textStatus` and `errorThrown` from jQuery. - var error = options.error; - options.error = function(xhr, textStatus, errorThrown) { - options.textStatus = textStatus; - options.errorThrown = errorThrown; - if (error) error.call(options.context, xhr, textStatus, errorThrown); - }; - - // Make the request, allowing the user to override any Ajax options. - var xhr = options.xhr = Backbone.ajax(_.extend(params, options)); - model.trigger('request', model, xhr, options); - return xhr; - }; - - // Map from CRUD to HTTP for our default `Backbone.sync` implementation. - var methodMap = { - 'create': 'POST', - 'update': 'PUT', - 'patch': 'PATCH', - 'delete': 'DELETE', - 'read': 'GET' - }; - - // Set the default implementation of `Backbone.ajax` to proxy through to `$`. - // Override this if you'd like to use a different library. - Backbone.ajax = function() { - return Backbone.$.ajax.apply(Backbone.$, 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. - var Router = 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 optionalParam = /\((.*?)\)/g; - var namedParam = /(\(\?)?:\w+/g; - var splatParam = /\*\w+/g; - var escapeRegExp = /[\-{}\[\]+?.,\\\^$|#\s]/g; - - // Set up all inheritable **Backbone.Router** properties and methods. - _.extend(Router.prototype, 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) { - if (!_.isRegExp(route)) route = this._routeToRegExp(route); - if (_.isFunction(name)) { - callback = name; - name = ''; - } - if (!callback) callback = this[name]; - var router = this; - Backbone.history.route(route, function(fragment) { - var args = router._extractParameters(route, fragment); - if (router.execute(callback, args, name) !== false) { - router.trigger.apply(router, ['route:' + name].concat(args)); - router.trigger('route', name, args); - Backbone.history.trigger('route', router, name, args); - } - }); - return this; - }, - - // Execute a route handler with the provided parameters. This is an - // excellent place to do pre-route setup or post-route cleanup. - execute: function(callback, args, name) { - if (callback) callback.apply(this, args); - }, - - // Simple proxy to `Backbone.history` to save a fragment into the history. - navigate: function(fragment, options) { - Backbone.history.navigate(fragment, options); - return this; - }, - - // 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; - this.routes = _.result(this, 'routes'); - var route, routes = _.keys(this.routes); - while ((route = routes.pop()) != null) { - this.route(route, this.routes[route]); - } - }, - - // Convert a route string into a regular expression, suitable for matching - // against the current location hash. - _routeToRegExp: function(route) { - route = route.replace(escapeRegExp, '\\$&') - .replace(optionalParam, '(?:$1)?') - .replace(namedParam, function(match, optional) { - return optional ? match : '([^/?]+)'; - }) - .replace(splatParam, '([^?]*?)'); - return new RegExp('^' + route + '(?:\\?([\\s\\S]*))?$'); - }, - - // Given a route, and a URL fragment that it matches, return the array of - // extracted decoded parameters. Empty or unmatched parameters will be - // treated as `null` to normalize cross-browser behavior. - _extractParameters: function(route, fragment) { - var params = route.exec(fragment).slice(1); - return _.map(params, function(param, i) { - // Don't decode the search params. - if (i === params.length - 1) return param || null; - return param ? decodeURIComponent(param) : null; - }); - } - - }); - - // Backbone.History - // ---------------- - - // Handles cross-browser history management, based on either - // [pushState](http://diveintohtml5.info/history.html) and real URLs, or - // [onhashchange](https://developer.mozilla.org/en-US/docs/DOM/window.onhashchange) - // and URL fragments. If the browser supports neither (old IE, natch), - // falls back to polling. - var History = Backbone.History = function() { - this.handlers = []; - this.checkUrl = _.bind(this.checkUrl, this); - - // Ensure that `History` can be used outside of the browser. - if (typeof window !== 'undefined') { - this.location = window.location; - this.history = window.history; - } - }; - - // Cached regex for stripping a leading hash/slash and trailing space. - var routeStripper = /^[#\/]|\s+$/g; - - // Cached regex for stripping leading and trailing slashes. - var rootStripper = /^\/+|\/+$/g; - - // Cached regex for stripping urls of hash. - var pathStripper = /#.*$/; - - // Has the history handling already been started? - History.started = false; - - // Set up all inheritable **Backbone.History** properties and methods. - _.extend(History.prototype, Events, { - - // The default interval to poll for hash changes, if necessary, is - // twenty times a second. - interval: 50, - - // Are we at the app root? - atRoot: function() { - var path = this.location.pathname.replace(/[^\/]$/, '$&/'); - return path === this.root && !this.getSearch(); - }, - - // Does the pathname match the root? - matchRoot: function() { - var path = this.decodeFragment(this.location.pathname); - var rootPath = path.slice(0, this.root.length - 1) + '/'; - return rootPath === this.root; - }, - - // Unicode characters in `location.pathname` are percent encoded so they're - // decoded for comparison. `%25` should not be decoded since it may be part - // of an encoded parameter. - decodeFragment: function(fragment) { - return decodeURI(fragment.replace(/%25/g, '%2525')); - }, - - // In IE6, the hash fragment and search params are incorrect if the - // fragment contains `?`. - getSearch: function() { - var match = this.location.href.replace(/#.*/, '').match(/\?.+/); - return match ? match[0] : ''; - }, - - // Gets the true hash value. Cannot use location.hash directly due to bug - // in Firefox where location.hash will always be decoded. - getHash: function(window) { - var match = (window || this).location.href.match(/#(.*)$/); - return match ? match[1] : ''; - }, - - // Get the pathname and search params, without the root. - getPath: function() { - var path = this.decodeFragment( - this.location.pathname + this.getSearch() - ).slice(this.root.length - 1); - return path.charAt(0) === '/' ? path.slice(1) : path; - }, - - // Get the cross-browser normalized URL fragment from the path or hash. - getFragment: function(fragment) { - if (fragment == null) { - if (this._usePushState || !this._wantsHashChange) { - fragment = this.getPath(); - } else { - fragment = this.getHash(); - } - } - return fragment.replace(routeStripper, ''); - }, - - // Start the hash change handling, returning `true` if the current URL matches - // an existing route, and `false` otherwise. - start: function(options) { - if (History.started) throw new Error('Backbone.history has already been started'); - History.started = true; - - // Figure out the initial configuration. Do we need an iframe? - // Is pushState desired ... is it available? - this.options = _.extend({root: '/'}, this.options, options); - this.root = this.options.root; - this._wantsHashChange = this.options.hashChange !== false; - this._hasHashChange = 'onhashchange' in window && (document.documentMode === void 0 || document.documentMode > 7); - this._useHashChange = this._wantsHashChange && this._hasHashChange; - this._wantsPushState = !!this.options.pushState; - this._hasPushState = !!(this.history && this.history.pushState); - this._usePushState = this._wantsPushState && this._hasPushState; - this.fragment = this.getFragment(); - - // Normalize root to always include a leading and trailing slash. - this.root = ('/' + this.root + '/').replace(rootStripper, '/'); - - // Transition from hashChange to pushState or vice versa if both are - // requested. - if (this._wantsHashChange && this._wantsPushState) { - - // If we've started off with a route from a `pushState`-enabled - // browser, but we're currently in a browser that doesn't support it... - if (!this._hasPushState && !this.atRoot()) { - var rootPath = this.root.slice(0, -1) || '/'; - this.location.replace(rootPath + '#' + this.getPath()); - // Return immediately as browser will do redirect to new url - return true; - - // Or if we've started out with a hash-based route, but we're currently - // in a browser where it could be `pushState`-based instead... - } else if (this._hasPushState && this.atRoot()) { - this.navigate(this.getHash(), {replace: true}); - } - - } - - // Proxy an iframe to handle location events if the browser doesn't - // support the `hashchange` event, HTML5 history, or the user wants - // `hashChange` but not `pushState`. - if (!this._hasHashChange && this._wantsHashChange && !this._usePushState) { - this.iframe = document.createElement('iframe'); - this.iframe.src = 'javascript:0'; - this.iframe.style.display = 'none'; - this.iframe.tabIndex = -1; - var body = document.body; - // Using `appendChild` will throw on IE < 9 if the document is not ready. - var iWindow = body.insertBefore(this.iframe, body.firstChild).contentWindow; - iWindow.document.open(); - iWindow.document.close(); - iWindow.location.hash = '#' + this.fragment; - } - - // Add a cross-platform `addEventListener` shim for older browsers. - var addEventListener = window.addEventListener || function(eventName, listener) { - return attachEvent('on' + eventName, listener); - }; - - // Depending on whether we're using pushState or hashes, and whether - // 'onhashchange' is supported, determine how we check the URL state. - if (this._usePushState) { - addEventListener('popstate', this.checkUrl, false); - } else if (this._useHashChange && !this.iframe) { - addEventListener('hashchange', this.checkUrl, false); - } else if (this._wantsHashChange) { - this._checkUrlInterval = setInterval(this.checkUrl, this.interval); - } - - if (!this.options.silent) return this.loadUrl(); - }, - - // Disable Backbone.history, perhaps temporarily. Not useful in a real app, - // but possibly useful for unit testing Routers. - stop: function() { - // Add a cross-platform `removeEventListener` shim for older browsers. - var removeEventListener = window.removeEventListener || function(eventName, listener) { - return detachEvent('on' + eventName, listener); - }; - - // Remove window listeners. - if (this._usePushState) { - removeEventListener('popstate', this.checkUrl, false); - } else if (this._useHashChange && !this.iframe) { - removeEventListener('hashchange', this.checkUrl, false); - } - - // Clean up the iframe if necessary. - if (this.iframe) { - document.body.removeChild(this.iframe); - this.iframe = null; - } - - // Some environments will throw when clearing an undefined interval. - if (this._checkUrlInterval) clearInterval(this._checkUrlInterval); - History.started = false; - }, - - // 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 the user pressed the back button, the iframe's hash will have - // changed and we should use that for comparison. - if (current === this.fragment && this.iframe) { - current = this.getHash(this.iframe.contentWindow); - } - - if (current === this.fragment) return false; - if (this.iframe) this.navigate(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(fragment) { - // If the root doesn't match, no routes can match either. - if (!this.matchRoot()) return false; - fragment = this.fragment = this.getFragment(fragment); - return _.some(this.handlers, function(handler) { - if (handler.route.test(fragment)) { - handler.callback(fragment); - return true; - } - }); - }, - - // Save a fragment into the hash history, or replace the URL state if the - // 'replace' option is passed. You are responsible for properly URL-encoding - // the fragment in advance. - // - // The options object can contain `trigger: true` if you wish to have the - // route callback be fired (not usually desirable), or `replace: true`, if - // you wish to modify the current URL without adding an entry to the history. - navigate: function(fragment, options) { - if (!History.started) return false; - if (!options || options === true) options = {trigger: !!options}; - - // Normalize the fragment. - fragment = this.getFragment(fragment || ''); - - // Don't include a trailing slash on the root. - var rootPath = this.root; - if (fragment === '' || fragment.charAt(0) === '?') { - rootPath = rootPath.slice(0, -1) || '/'; - } - var url = rootPath + fragment; - - // Strip the hash and decode for matching. - fragment = this.decodeFragment(fragment.replace(pathStripper, '')); - - if (this.fragment === fragment) return; - this.fragment = fragment; - - // If pushState is available, we use it to set the fragment as a real URL. - if (this._usePushState) { - this.history[options.replace ? 'replaceState' : 'pushState']({}, document.title, url); - - // If hash changes haven't been explicitly disabled, update the hash - // fragment to store history. - } else if (this._wantsHashChange) { - this._updateHash(this.location, fragment, options.replace); - if (this.iframe && fragment !== this.getHash(this.iframe.contentWindow)) { - var iWindow = this.iframe.contentWindow; - - // Opening and closing the iframe tricks IE7 and earlier to push a - // history entry on hash-tag change. When replace is true, we don't - // want this. - if (!options.replace) { - iWindow.document.open(); - iWindow.document.close(); - } - - this._updateHash(iWindow.location, fragment, options.replace); - } - - // If you've told us that you explicitly don't want fallback hashchange- - // based history, then `navigate` becomes a page refresh. - } else { - return this.location.assign(url); - } - if (options.trigger) return this.loadUrl(fragment); - }, - - // Update the hash location, either replacing the current entry, or adding - // a new one to the browser history. - _updateHash: function(location, fragment, replace) { - if (replace) { - var href = location.href.replace(/(javascript:|#).*$/, ''); - location.replace(href + '#' + fragment); - } else { - // Some browsers require that `hash` contains a leading #. - location.hash = '#' + fragment; - } - } - - }); - - // Create the default Backbone.history. - Backbone.history = new History; - - // Helpers - // ------- - - // 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 extend = function(protoProps, staticProps) { - var parent = this; - 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 the parent constructor. - if (protoProps && _.has(protoProps, 'constructor')) { - child = protoProps.constructor; - } else { - child = function(){ return parent.apply(this, arguments); }; - } - - // Add static properties to the constructor function, if supplied. - _.extend(child, parent, staticProps); - - // Set the prototype chain to inherit from `parent`, without calling - // `parent`'s constructor function and add the prototype properties. - child.prototype = _.create(parent.prototype, protoProps); - child.prototype.constructor = child; - - // Set a convenience property in case the parent's prototype is needed - // later. - child.__super__ = parent.prototype; - - return child; - }; - - // Set up inheritance for the model, collection, router, view and history. - Model.extend = Collection.extend = Router.extend = View.extend = History.extend = extend; - - // 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(model, options) { - var error = options.error; - options.error = function(resp) { - if (error) error.call(options.context, model, resp, options); - model.trigger('error', model, resp, options); - }; - }; - - return Backbone; -}); |