(function(){Backbone.js 0.9.10
+
+
+
+
+ ¶
+
+ Backbone.js 1.0.0
(c) 2010-2013 Jeremy Ashkenas, DocumentCloud Inc.
Backbone may be freely distributed under the MIT license.
For all details and documentation:
http://backbonejs.org
-
- (function(){
-
-
+
+
+ (function(){
+
+
-Initial Setup
+
+
+
+
+ ¶
+
+ Initial Setup
-
-
+
+
+
-Save a reference to the global object (window in the browser, exports
+
+
+
+
+ ¶
+
+ Save a reference to the global object (window in the browser, exports
on the server).
-
-
- var root = this;
-
-
+
+
+ var root = this;
+
+
-Save the previous value of the Backbone variable, so that it can be
+
+
+
+
+ ¶
+
+ Save the previous value of the Backbone variable, so that it can be
restored later on, if noConflict is used.
-
-
- var previousBackbone = root.Backbone;
-
-
+
+
+ var previousBackbone = root.Backbone;
+
+
-Create a local reference to array methods.
-
+
+
+
+
+ ¶
+
+ Create local references to array methods we'll want to use later.
-
- var array = [];
- var push = array.push;
- var slice = array.slice;
- var splice = array.splice;
-
-
+
+
+ var array = [];
+ var push = array.push;
+ var slice = array.slice;
+ var splice = array.splice;
+
+
-The top-level namespace. All public Backbone classes and modules will
-be attached to this. Exported for both CommonJS and the browser.
-
+
+
+
+
+ ¶
+
+ The top-level namespace. All public Backbone classes and modules will
+be attached to this. Exported for both the browser and the server.
-
- var Backbone;
- if (typeof exports !== 'undefined') {
- Backbone = exports;
- } else {
- Backbone = root.Backbone = {};
- }
-
-
+
+
+ var Backbone;
+ if (typeof exports !== 'undefined') {
+ Backbone = exports;
+ } else {
+ Backbone = root.Backbone = {};
+ }
+
+
-Current version of the library. Keep in sync with package.json.
-
+
+
+
+
+ ¶
+
+ Current version of the library. Keep in sync with package.json.
-
- Backbone.VERSION = '0.9.10';
-
-
+
+
+ Backbone.VERSION = '1.0.0';
+
+
-Require Underscore, if we're on the server, and it's not already present.
-
+
+
+
+
+ ¶
+
+ Require Underscore, if we're on the server, and it's not already present.
-
- var _ = root._;
- if (!_ && (typeof require !== 'undefined')) _ = require('underscore');
-
-
+
+
+ var _ = root._;
+ if (!_ && (typeof require !== 'undefined')) _ = require('underscore');
+
+
-For Backbone's purposes, jQuery, Zepto, or Ender owns the $ variable.
-
+
+
+
+
+ ¶
+
+ For Backbone's purposes, jQuery, Zepto, Ender, or My Library (kidding) owns
+the $ variable.
-
- Backbone.$ = root.jQuery || root.Zepto || root.ender;
-
-
+
+
+ Backbone.$ = root.jQuery || root.Zepto || root.ender || root.$;
+
+
-Runs Backbone.js in noConflict mode, returning the Backbone variable
+
+
+
+
+ ¶
+
+ 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;
- };
-
-
+
+
+ Backbone.noConflict = function() {
+ root.Backbone = previousBackbone;
+ return this;
+ };
+
+
-Turn on emulateHTTP to support legacy HTTP servers. Setting this option
+
+
+
+
+ ¶
+
+ Turn on emulateHTTP to 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;
-
-
+
+
+ Backbone.emulateHTTP = false;
+
+
-Turn on emulateJSON to support legacy servers that can't deal with direct
+
+
+
+
+ ¶
+
+ 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.emulateJSON = false;
+
+
-Backbone.Events
+
+
+
+
+ ¶
+
+ Backbone.Events
-
-
+
+
+
-Regular expression used to split event strings.
-
-
-
-
- var eventSplitter = /\s+/;
-
-
-
-
-Implement fancy features of the Events API such as multiple event
-names "change blur" and jQuery-style event maps {change: action}
-in terms of the existing API.
-
-
-
-
- var eventsApi = function(obj, action, name, rest) {
- if (!name) return true;
-
-
-
-
-Handle event maps.
-
-
-
-
- if (typeof name === 'object') {
- for (var key in name) {
- obj[action].apply(obj, [key, name[key]].concat(rest));
- }
- return false;
- }
-
-
-
-
-Handle space separated event names.
-
-
-
-
- if (eventSplitter.test(name)) {
- var names = name.split(eventSplitter);
- for (var i = 0, l = names.length; i < l; i++) {
- obj[action].apply(obj, [names[i]].concat(rest));
- }
- return false;
- }
-
- return true;
- };
-
-
-
-
-Optimized internal dispatch function for triggering events. Tries to
-keep the usual cases speedy (most 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);
- }
- };
-
-
-
-
-A module that can be mixed in to any object in order to provide it with
+
+
+
+
+ ¶
+
+ A module that can be mixed in to any object in order to provide it with
custom events. You may bind with on or remove with off callback
functions to an event; trigger-ing an event fires all callbacks in
succession.
@@ -260,2187 +266,2468 @@ _.extend(object, Backbone.Events);
object.on('expand', function(){ alert('expanded'); });
object.trigger('expand');
-
-
var Events = Backbone.Events = {
-
-
+
+
+ var Events = Backbone.Events = {
+
+
-Bind one or more space separated events, or an events map,
-to a callback function. Passing "all" will bind the callback to
-all events fired.
-
+
+
+
+
+ ¶
+
+ Bind an event to a callback function. Passing "all" will bind
+the callback to all events fired.
-
- on: function(name, callback, context) {
- if (!eventsApi(this, 'on', name, [callback, context]) || !callback) return this;
- this._events || (this._events = {});
- var events = this._events[name] || (this._events[name] = []);
- events.push({callback: callback, context: context, ctx: context || this});
- return this;
- },
-
-
+
+
+ on: function(name, callback, context) {
+ if (!eventsApi(this, 'on', name, [callback, context]) || !callback) return this;
+ this._events || (this._events = {});
+ var events = this._events[name] || (this._events[name] = []);
+ events.push({callback: callback, context: context, ctx: context || this});
+ return this;
+ },
+
+
-Bind events to only be triggered a single time. After the first time
+
+
+
+
+ ¶
+
+ Bind an event to only be triggered a single time. After the first time
the callback is invoked, it will be removed.
-
-
- once: function(name, callback, context) {
- if (!eventsApi(this, 'once', name, [callback, context]) || !callback) return this;
- var self = this;
- var once = _.once(function() {
- self.off(name, once);
- callback.apply(this, arguments);
- });
- once._callback = callback;
- return this.on(name, once, context);
- },
-
-
+
+
+ once: function(name, callback, context) {
+ if (!eventsApi(this, 'once', name, [callback, context]) || !callback) return this;
+ var self = this;
+ var once = _.once(function() {
+ self.off(name, once);
+ callback.apply(this, arguments);
+ });
+ once._callback = callback;
+ return this.on(name, once, context);
+ },
+
+
-Remove one or many callbacks. If context is null, removes all
+
+
+
+
+ ¶
+
+ 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.
-
-
- off: function(name, callback, context) {
- var retain, ev, events, names, i, l, j, k;
- if (!this._events || !eventsApi(this, 'off', name, [callback, context])) return this;
- if (!name && !callback && !context) {
- this._events = {};
- return this;
- }
+
+
+ off: function(name, callback, context) {
+ var retain, ev, events, names, i, l, j, k;
+ if (!this._events || !eventsApi(this, 'off', name, [callback, context])) return this;
+ if (!name && !callback && !context) {
+ this._events = {};
+ return this;
+ }
- names = name ? [name] : _.keys(this._events);
- for (i = 0, l = names.length; i < l; i++) {
- name = names[i];
- if (events = this._events[name]) {
- this._events[name] = retain = [];
- if (callback || context) {
- for (j = 0, k = events.length; j < k; j++) {
- ev = events[j];
- if ((callback && callback !== ev.callback &&
- callback !== ev.callback._callback) ||
- (context && context !== ev.context)) {
- retain.push(ev);
- }
- }
- }
- if (!retain.length) delete this._events[name];
- }
- }
+ names = name ? [name] : _.keys(this._events);
+ for (i = 0, l = names.length; i < l; i++) {
+ name = names[i];
+ if (events = this._events[name]) {
+ this._events[name] = retain = [];
+ if (callback || context) {
+ for (j = 0, k = events.length; j < k; j++) {
+ ev = events[j];
+ if ((callback && callback !== ev.callback && callback !== ev.callback._callback) ||
+ (context && context !== ev.context)) {
+ retain.push(ev);
+ }
+ }
+ }
+ if (!retain.length) delete this._events[name];
+ }
+ }
- return this;
- },
-
-
+ return this;
+ },
+
+
-Trigger one or many events, firing all bound callbacks. Callbacks are
+
+
+
+
+ ¶
+
+ 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).
-
-
- trigger: function(name) {
- if (!this._events) return this;
- var args = slice.call(arguments, 1);
- if (!eventsApi(this, 'trigger', name, args)) return this;
- var events = this._events[name];
- var allEvents = this._events.all;
- if (events) triggerEvents(events, args);
- if (allEvents) triggerEvents(allEvents, arguments);
- return this;
- },
-
-
+
+
+ trigger: function(name) {
+ if (!this._events) return this;
+ var args = slice.call(arguments, 1);
+ if (!eventsApi(this, 'trigger', name, args)) return this;
+ var events = this._events[name];
+ var allEvents = this._events.all;
+ if (events) triggerEvents(events, args);
+ if (allEvents) triggerEvents(allEvents, arguments);
+ return this;
+ },
+
+
-Tell this object to stop listening to either specific events ... or
+
+
+
+
+ ¶
+
+ Tell this object to stop listening to either specific events ... or
to every object it's currently listening to.
-
-
- stopListening: function(obj, name, callback) {
- var listeners = this._listeners;
- if (!listeners) return this;
- var deleteListener = !name && !callback;
- if (typeof name === 'object') callback = this;
- if (obj) (listeners = {})[obj._listenerId] = obj;
- for (var id in listeners) {
- listeners[id].off(name, callback, this);
- if (deleteListener) delete this._listeners[id];
- }
- return this;
- }
- };
+
+
+ stopListening: function(obj, name, callback) {
+ var listeners = this._listeners;
+ if (!listeners) return this;
+ var deleteListener = !name && !callback;
+ if (typeof name === 'object') callback = this;
+ if (obj) (listeners = {})[obj._listenerId] = obj;
+ for (var id in listeners) {
+ listeners[id].off(name, callback, this);
+ if (deleteListener) delete this._listeners[id];
+ }
+ return this;
+ }
- var listenMethods = {listenTo: 'on', listenToOnce: 'once'};
-
-
+ };
+
+
-An inversion-of-control versions of on and once. Tell this object to listen to
-an event in another object ... keeping track of what it's listening to.
-
+
+
+
+
+ ¶
+
+ Regular expression used to split event strings.
-
- _.each(listenMethods, function(implementation, method) {
- Events[method] = function(obj, name, callback) {
- var listeners = this._listeners || (this._listeners = {});
- var id = obj._listenerId || (obj._listenerId = _.uniqueId('l'));
- listeners[id] = obj;
- if (typeof name === 'object') callback = this;
- obj[implementation](name, callback, this);
- return this;
- };
- });
-
-
+
+
+ var eventSplitter = /\s+/;
+
+
-Aliases for backwards compatibility.
-
+
+
+
+
+ ¶
+
+ Implement fancy features of the Events API such as multiple event
+names "change blur" and jQuery-style event maps {change: action}
+in terms of the existing API.
-
- Events.bind = Events.on;
- Events.unbind = Events.off;
-
-
+
+
+ var eventsApi = function(obj, action, name, rest) {
+ if (!name) return true;
+
+
-Allow the Backbone object to serve as a global event bus, for folks who
+
+
+
+
+ ¶
+
+ Handle event maps.
+
+
+
+
+ if (typeof name === 'object') {
+ for (var key in name) {
+ obj[action].apply(obj, [key, name[key]].concat(rest));
+ }
+ return false;
+ }
+
+
+
+
+
+
+
+
+ ¶
+
+ Handle space separated event names.
+
+
+
+
+ if (eventSplitter.test(name)) {
+ var names = name.split(eventSplitter);
+ for (var i = 0, l = names.length; i < l; i++) {
+ obj[action].apply(obj, [names[i]].concat(rest));
+ }
+ return false;
+ }
+
+ return true;
+ };
+
+
+
+
+
+
+
+
+ ¶
+
+ 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);
+ }
+ };
+
+ var listenMethods = {listenTo: 'on', listenToOnce: 'once'};
+
+
+
+
+
+
+
+
+ ¶
+
+ Inversion-of-control versions of on and once. Tell this object to
+listen to an event in another object ... keeping track of what it's
+listening to.
+
+
+
+
+ _.each(listenMethods, function(implementation, method) {
+ Events[method] = function(obj, name, callback) {
+ var listeners = this._listeners || (this._listeners = {});
+ var id = obj._listenerId || (obj._listenerId = _.uniqueId('l'));
+ listeners[id] = obj;
+ if (typeof name === 'object') callback = this;
+ obj[implementation](name, callback, this);
+ return this;
+ };
+ });
+
+
+
+
+
+
+
+
+ ¶
+
+ 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);
-
-
+
+
+ _.extend(Backbone, Events);
+
+
-Backbone.Model
+
+
+
+
+ ¶
+
+ Backbone.Model
-
-
+
+
+
-Create a new model, with defined attributes. A client id (cid)
+
+
+
+
+ ¶
+
+ 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 defaults;
- var attrs = attributes || {};
- this.cid = _.uniqueId('c');
- this.attributes = {};
- if (options && options.collection) this.collection = options.collection;
- if (options && options.parse) attrs = this.parse(attrs, options) || {};
- if (defaults = _.result(this, 'defaults')) {
- attrs = _.defaults({}, attrs, defaults);
- }
- this.set(attrs, options);
- this.changed = {};
- this.initialize.apply(this, arguments);
- };
-
-
+
+
+ var Model = Backbone.Model = function(attributes, options) {
+ var defaults;
+ var attrs = attributes || {};
+ options || (options = {});
+ this.cid = _.uniqueId('c');
+ this.attributes = {};
+ _.extend(this, _.pick(options, modelOptions));
+ if (options.parse) attrs = this.parse(attrs, options) || {};
+ if (defaults = _.result(this, 'defaults')) {
+ attrs = _.defaults({}, attrs, defaults);
+ }
+ this.set(attrs, options);
+ this.changed = {};
+ this.initialize.apply(this, arguments);
+ };
+
+
-Attach all inheritable methods to the Model prototype.
-
+
+
+
+
+ ¶
+
+ A list of options to be attached directly to the model, if provided.
-
- _.extend(Model.prototype, Events, {
-
-
+
+
+ var modelOptions = ['url', 'urlRoot', 'collection'];
+
+
-A hash of attributes whose current and previous value differ.
-
+
+
+
+ _.extend(Model.prototype, Events, {
+
+
-The value returned during the last failed validation.
-
+
+
+
+
+ ¶
+
+ A hash of attributes whose current and previous value differ.
-
- validationError: null,
-
-
+
+
+ changed: null,
+
+
-The default name for the JSON id attribute is "id". MongoDB and
+
+
+
+
+ ¶
+
+ 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',
-
-
+
+
+ idAttribute: 'id',
+
+
-Initialize is an empty function by default. Override it with your own
+
+
+
+
+ ¶
+
+ Initialize is an empty function by default. Override it with your own
initialization logic.
-
-
- initialize: function(){},
-
-
+
+
+ initialize: function(){},
+
+
-Return a copy of the model's attributes object.
-
+
+
+
+
+ ¶
+
+ Return a copy of the model's attributes object.
-
- toJSON: function(options) {
- return _.clone(this.attributes);
- },
-
-
+
+
+ toJSON: function(options) {
+ return _.clone(this.attributes);
+ },
+
+
-Proxy Backbone.sync by default.
-
+
+
+
+
+ ¶
+
+ 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);
- },
-
-
+
+
+ sync: function() {
+ return Backbone.sync.apply(this, arguments);
+ },
+
+
-Get the value of an attribute.
-
+
+
+
+
+ ¶
+
+ Get the value of an attribute.
-
- get: function(attr) {
- return this.attributes[attr];
- },
-
-
+
+
+ get: function(attr) {
+ return this.attributes[attr];
+ },
+
+
-Get the HTML-escaped value of an attribute.
-
+
+
+
+
+ ¶
+
+ Get the HTML-escaped value of an attribute.
-
- escape: function(attr) {
- return _.escape(this.get(attr));
- },
-
-
+
+
+ escape: function(attr) {
+ return _.escape(this.get(attr));
+ },
+
+
-Returns true if the attribute contains a value that is not null
+
+
+
+
+ ¶
+
+ Returns true if the attribute contains a value that is not null
or undefined.
-
-
- has: function(attr) {
- return this.get(attr) != null;
- },
-
-
+
+
+ has: function(attr) {
+ return this.get(attr) != null;
+ },
+
+
-
-
-
-
-
-
-Set a hash of model attributes on the object, firing "change" unless
-you choose to silence it.
-
+
+
+
+
+ ¶
+
+ 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) {
- var attr, attrs, unset, changes, changing, prev, current;
- if (key == null) return this;
-
-
+
+
+ set: function(key, val, options) {
+ var attr, attrs, unset, changes, silent, changing, prev, current;
+ if (key == null) return this;
+
+
-Handle both "key", value and {key: value} -style arguments.
-
+
+
+
+
+ ¶
+
+ Handle both "key", value and {key: value} -style arguments.
-
- if (typeof key === 'object') {
- attrs = key;
- options = val;
- } else {
- (attrs = {})[key] = val;
- }
+
+
+ if (typeof key === 'object') {
+ attrs = key;
+ options = val;
+ } else {
+ (attrs = {})[key] = val;
+ }
- options || (options = {});
-
-
+ options || (options = {});
+
+
-Run validation.
-
+
+
+
+ if (!this._validate(attrs, options)) return false;
+
+
-Extract attributes and options.
-
+
+
+
+
+ ¶
+
+ Extract attributes and options.
-
- unset = options.unset;
- changes = [];
- changing = this._changing;
- this._changing = true;
+
+
+ unset = options.unset;
+ silent = options.silent;
+ changes = [];
+ changing = this._changing;
+ this._changing = true;
- if (!changing) {
- this._previousAttributes = _.clone(this.attributes);
- this.changed = {};
- }
- current = this.attributes, prev = this._previousAttributes;
-
-
+ if (!changing) {
+ this._previousAttributes = _.clone(this.attributes);
+ this.changed = {};
+ }
+ current = this.attributes, prev = this._previousAttributes;
+
+
-Check for changes of id.
-
+
+
+
+
+ ¶
+
+ Check for changes of id.
-
- if (this.idAttribute in attrs) this.id = attrs[this.idAttribute];
-
-
+
+
+ if (this.idAttribute in attrs) this.id = attrs[this.idAttribute];
+
+
-For each set attribute, update or delete the current value.
-
+
+
+
+
+ ¶
+
+ For each set attribute, update or delete the current value.
-
- for (attr in attrs) {
- val = attrs[attr];
- if (!_.isEqual(current[attr], val)) changes.push(attr);
- if (!_.isEqual(prev[attr], val)) {
- this.changed[attr] = val;
- } else {
- delete this.changed[attr];
- }
- unset ? delete current[attr] : current[attr] = val;
- }
-
-
+
+
+ for (attr in attrs) {
+ val = attrs[attr];
+ if (!_.isEqual(current[attr], val)) changes.push(attr);
+ if (!_.isEqual(prev[attr], val)) {
+ this.changed[attr] = val;
+ } else {
+ delete this.changed[attr];
+ }
+ unset ? delete current[attr] : current[attr] = val;
+ }
+
+
-Trigger all relevant attribute changes.
-
+
+
+
+
+ ¶
+
+ Trigger all relevant attribute changes.
-
- if (changes.length) this._pending = true;
- for (var i = 0, l = changes.length; i < l; i++) {
- this.trigger('change:' + changes[i], this, current[changes[i]], options);
- }
-
- if (changing) return this;
- while (this._pending) {
- this._pending = false;
- this.trigger('change', this, options);
- }
- this._pending = false;
- this._changing = false;
- return this;
- },
-
-
+
+
+ if (!silent) {
+ if (changes.length) this._pending = true;
+ for (var i = 0, l = changes.length; i < l; i++) {
+ this.trigger('change:' + changes[i], this, current[changes[i]], options);
+ }
+ }
+
+
-Remove an attribute from the model, firing "change" unless you choose
-to silence it. unset is a noop if the attribute doesn't exist.
-
+
+
+
+
+ ¶
+
+ You might be wondering why there's a while loop here. Changes can
+be recursively nested within "change" events.
-
- unset: function(attr, options) {
- return this.set(attr, void 0, _.extend({}, options, {unset: true}));
- },
-
-
+
+
+ if (changing) return this;
+ if (!silent) {
+ while (this._pending) {
+ this._pending = false;
+ this.trigger('change', this, options);
+ }
+ }
+ this._pending = false;
+ this._changing = false;
+ return this;
+ },
+
+
-Clear all attributes on the model, firing "change" unless you choose
-to silence it.
-
+
+
+
+
+ ¶
+
+ Remove an attribute from the model, firing "change". unset is a noop
+if the attribute doesn't exist.
-
- clear: function(options) {
- var attrs = {};
- for (var key in this.attributes) attrs[key] = void 0;
- return this.set(attrs, _.extend({}, options, {unset: true}));
- },
-
-
+
+
+ unset: function(attr, options) {
+ return this.set(attr, void 0, _.extend({}, options, {unset: true}));
+ },
+
+
-Determine if the model has changed since the last "change" event.
+
+
+
+
+ ¶
+
+ 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);
- },
-
-
+
+
+ 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
+
+
+
+
+ ¶
+
+ 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 val, changed = false;
- var old = this._changing ? this._previousAttributes : this.attributes;
- for (var attr in diff) {
- if (_.isEqual(old[attr], (val = diff[attr]))) continue;
- (changed || (changed = {}))[attr] = val;
- }
- return changed;
- },
-
-
+
+
+ changedAttributes: function(diff) {
+ if (!diff) return this.hasChanged() ? _.clone(this.changed) : false;
+ var val, changed = false;
+ var old = this._changing ? this._previousAttributes : this.attributes;
+ for (var attr in diff) {
+ if (_.isEqual(old[attr], (val = diff[attr]))) continue;
+ (changed || (changed = {}))[attr] = val;
+ }
+ return changed;
+ },
+
+
-Get the previous value of an attribute, recorded at the time the last
+
+
+
+
+ ¶
+
+ 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];
- },
-
-
+
+
+ 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
+
+
+
+
+ ¶
+
+ Get all of the attributes of the model at the time of the previous
"change" event.
-
-
- previousAttributes: function() {
- return _.clone(this._previousAttributes);
- },
-
-
+
+
+ previousAttributes: function() {
+ return _.clone(this._previousAttributes);
+ },
+
+
-
-
-
-
-
-
-Fetch the model from the server. If the server's representation of the
+
+
+
+
+ ¶
+
+ Fetch the model from the server. If the server's representation of the
model differs from its current attributes, they will be overridden,
triggering a "change" event.
-
-
- fetch: function(options) {
- options = options ? _.clone(options) : {};
- if (options.parse === void 0) options.parse = true;
- var model = this;
- var success = options.success;
- options.success = function(resp) {
- if (!model.set(model.parse(resp, options), options)) return false;
- if (success) success(model, resp, options);
- model.trigger('sync', model, resp, options);
- };
- wrapError(this, options);
- return this.sync('read', this, options);
- },
-
-
+
+
+ fetch: function(options) {
+ options = options ? _.clone(options) : {};
+ if (options.parse === void 0) options.parse = true;
+ var model = this;
+ var success = options.success;
+ options.success = function(resp) {
+ if (!model.set(model.parse(resp, options), options)) return false;
+ if (success) success(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.
+
+
+
+
+ ¶
+
+ 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) {
- var attrs, method, xhr, attributes = this.attributes;
-
-
+
+
+ save: function(key, val, options) {
+ var attrs, method, xhr, attributes = this.attributes;
+
+
-Handle both "key", value and {key: value} -style arguments.
-
+
+
+
+
+ ¶
+
+ Handle both "key", value and {key: value} -style arguments.
-
- if (key == null || typeof key === 'object') {
- attrs = key;
- options = val;
- } else {
- (attrs = {})[key] = val;
- }
-
-
+
+
+ if (key == null || typeof key === 'object') {
+ attrs = key;
+ options = val;
+ } else {
+ (attrs = {})[key] = val;
+ }
+
+
-If we're not waiting and attributes exist, save acts as set(attr).save(null, opts).
-
+
+
+
+
+ ¶
+
+ If we're not waiting and attributes exist, save acts as set(attr).save(null, opts).
-
- if (attrs && (!options || !options.wait) && !this.set(attrs, options)) return false;
+
+
+ if (attrs && (!options || !options.wait) && !this.set(attrs, options)) return false;
- options = _.extend({validate: true}, options);
-
-
+ options = _.extend({validate: true}, options);
+
+
-Do not persist invalid models.
-
+
+
+
+
+ ¶
+
+ Do not persist invalid models.
-
- if (!this._validate(attrs, options)) return false;
-
-
+
+
+ if (!this._validate(attrs, options)) return false;
+
+
-Set temporary attributes if {wait: true}.
-
+
+
+
+
+ ¶
+
+ Set temporary attributes if {wait: true}.
-
- if (attrs && options.wait) {
- this.attributes = _.extend({}, attributes, attrs);
- }
-
-
+
+
+ if (attrs && options.wait) {
+ this.attributes = _.extend({}, attributes, attrs);
+ }
+
+
-After a successful server-side save, the client is (optionally)
+
+
+
+
+ ¶
+
+ After a successful server-side save, the client is (optionally)
updated with the server-side state.
-
-
- if (options.parse === void 0) options.parse = true;
- var model = this;
- var success = options.success;
- options.success = function(resp) {
-
-
+
+
+ if (options.parse === void 0) options.parse = true;
+ var model = this;
+ var success = options.success;
+ options.success = function(resp) {
+
+
-Ensure attributes are restored during synchronous saves.
-
+
+
+
+
+ ¶
+
+ Ensure attributes are restored during synchronous saves.
-
- model.attributes = attributes;
- var serverAttrs = model.parse(resp, options);
- if (options.wait) serverAttrs = _.extend(attrs || {}, serverAttrs);
- if (_.isObject(serverAttrs) && !model.set(serverAttrs, options)) {
- return false;
- }
- if (success) success(model, resp, options);
- model.trigger('sync', model, resp, options);
- };
- wrapError(this, options);
+
+
+ model.attributes = attributes;
+ var serverAttrs = model.parse(resp, options);
+ if (options.wait) serverAttrs = _.extend(attrs || {}, serverAttrs);
+ if (_.isObject(serverAttrs) && !model.set(serverAttrs, options)) {
+ return false;
+ }
+ if (success) success(model, resp, options);
+ model.trigger('sync', model, resp, options);
+ };
+ wrapError(this, options);
- method = this.isNew() ? 'create' : (options.patch ? 'patch' : 'update');
- if (method === 'patch') options.attrs = attrs;
- xhr = this.sync(method, this, options);
-
-
+ method = this.isNew() ? 'create' : (options.patch ? 'patch' : 'update');
+ if (method === 'patch') options.attrs = attrs;
+ xhr = this.sync(method, this, options);
+
+
-Restore attributes.
-
+
+
+
+
+ ¶
+
+ Restore attributes.
-
- if (attrs && options.wait) this.attributes = attributes;
+
+
+ if (attrs && options.wait) this.attributes = attributes;
- return xhr;
- },
-
-
+ return xhr;
+ },
+
+
-Destroy this model on the server if it was already persisted.
+
+
+
+
+ ¶
+
+ 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;
+
+
+ destroy: function(options) {
+ options = options ? _.clone(options) : {};
+ var model = this;
+ var success = options.success;
- var destroy = function() {
- model.trigger('destroy', model, model.collection, options);
- };
+ var destroy = function() {
+ model.trigger('destroy', model, model.collection, options);
+ };
- options.success = function(resp) {
- if (options.wait || model.isNew()) destroy();
- if (success) success(model, resp, options);
- if (!model.isNew()) model.trigger('sync', model, resp, options);
- };
+ options.success = function(resp) {
+ if (options.wait || model.isNew()) destroy();
+ if (success) success(model, resp, options);
+ if (!model.isNew()) model.trigger('sync', model, resp, options);
+ };
- if (this.isNew()) {
- options.success();
- return false;
- }
- wrapError(this, options);
+ if (this.isNew()) {
+ options.success();
+ return false;
+ }
+ wrapError(this, options);
- var xhr = this.sync('delete', this, options);
- if (!options.wait) destroy();
- return xhr;
- },
-
-
+ var xhr = this.sync('delete', this, options);
+ if (!options.wait) destroy();
+ return xhr;
+ },
+
+
-Default URL for the model's representation on the server -- if you're
+
+
+
+
+ ¶
+
+ 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;
- return base + (base.charAt(base.length - 1) === '/' ? '' : '/') + encodeURIComponent(this.id);
- },
-
-
+
+
+ url: function() {
+ var base = _.result(this, 'urlRoot') || _.result(this.collection, 'url') || 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
+
+
+
+
+ ¶
+
+ 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;
- },
-
-
+
+
+ parse: function(resp, options) {
+ return resp;
+ },
+
+
-Create a new model with identical attributes to this one.
-
+
+
+
+
+ ¶
+
+ Create a new model with identical attributes to this one.
-
- clone: function() {
- return new this.constructor(this.attributes);
- },
-
-
+
+
+ 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.
-
+
+
+
+
+ ¶
+
+ A model is new if it has never been saved to the server, and lacks an id.
-
- isNew: function() {
- return this.id == null;
- },
-
-
+
+
+ isNew: function() {
+ return this.id == null;
+ },
+
+
-Check if the model is currently in a valid state.
-
+
+
+
+
+ ¶
+
+ Check if the model is currently in a valid state.
-
- isValid: function(options) {
- return !this.validate || !this.validate(this.attributes, options);
- },
-
-
+
+
+ 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 and call the invalid callback, if specified.
-
+
+
+
+
+ ¶
+
+ 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, options || {});
- return false;
- }
+
+
+ _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;
+ }
- });
-
-
+ });
+
+
-Backbone.Collection
+
+
+
+
+ ¶
+
+ Underscore methods that we want to implement on the Model.
+
-
-
+
+
+ var modelMethods = ['keys', 'values', 'pairs', 'invert', 'pick', 'omit'];
+
+
-Provides a standard collection class for our sets of models, ordered
-or unordered. If a comparator is specified, the Collection will maintain
+
+
+
+
+ ¶
+
+ Mix in each Underscore method as a proxy to Model#attributes.
+
+
+
+
+ _.each(modelMethods, function(method) {
+ Model.prototype[method] = function() {
+ var args = slice.call(arguments);
+ args.unshift(this.attributes);
+ return _[method].apply(_, args);
+ };
+ });
+
+
+
+
+
+
+
+
+ ¶
+
+ Backbone.Collection
+
+
+
+
+
+
+
+
+
+
+ ¶
+
+ If models tend to represent a single row of data, a Backbone Collection is
+more analagous 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));
- };
-
-
+
+
+ var Collection = Backbone.Collection = function(models, options) {
+ options || (options = {});
+ if (options.url) this.url = options.url;
+ 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));
+ };
+
+
-Define the Collection's inheritable methods.
-
+
+
+
+ var setOptions = {add: true, remove: true, merge: true};
+ var addOptions = {add: true, merge: false, remove: false};
+
+
-The default model for a collection is just a Backbone.Model.
+
+
+
+
+ ¶
+
+ 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,
-
-
+
+
+ model: Model,
+
+
-Initialize is an empty function by default. Override it with your own
+
+
+
+
+ ¶
+
+ Initialize is an empty function by default. Override it with your own
initialization logic.
-
-
- initialize: function(){},
-
-
+
+
+ initialize: function(){},
+
+
-The JSON representation of a Collection is an array of the
+
+
+
+
+ ¶
+
+ 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); });
- },
-
-
+
+
+ toJSON: function(options) {
+ return this.map(function(model){ return model.toJSON(options); });
+ },
+
+
-Proxy Backbone.sync by default.
-
+
+
+
+
+ ¶
+
+ Proxy Backbone.sync by default.
-
- sync: function() {
- return Backbone.sync.apply(this, arguments);
- },
-
-
+
+
+ sync: function() {
+ return Backbone.sync.apply(this, arguments);
+ },
+
+
-Add a model, or list of models to the set.
-
+
+
+
+
+ ¶
+
+ Add a model, or list of models to the set.
-
- add: function(models, options) {
- models = _.isArray(models) ? models.slice() : [models];
- options || (options = {});
- var i, l, model, attrs, existing, doSort, add, at, sort, sortAttr;
- add = [];
- at = options.at;
- sort = this.comparator && (at == null) && options.sort !== false;
- sortAttr = _.isString(this.comparator) ? this.comparator : null;
- var modelMap = {};
-
-
+
+
+ add: function(models, options) {
+ return this.set(models, _.defaults(options || {}, addOptions));
+ },
+
+
-Turn bare objects into model references, and prevent invalid models
+
+
+
+
+ ¶
+
+ Remove a model, or a list of models from the set.
+
+
+
+
+ remove: function(models, options) {
+ models = _.isArray(models) ? models.slice() : [models];
+ options || (options = {});
+ var i, l, index, model;
+ for (i = 0, l = models.length; i < l; i++) {
+ model = this.get(models[i]);
+ if (!model) continue;
+ delete this._byId[model.id];
+ delete this._byId[model.cid];
+ index = this.indexOf(model);
+ this.models.splice(index, 1);
+ this.length--;
+ if (!options.silent) {
+ options.index = index;
+ model.trigger('remove', model, this, options);
+ }
+ this._removeReference(model);
+ }
+ return this;
+ },
+
+
+
+
+
+
+
+
+ ¶
+
+ 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) {
+ options = _.defaults(options || {}, setOptions);
+ if (options.parse) models = this.parse(models, options);
+ if (!_.isArray(models)) models = models ? [models] : [];
+ var i, l, model, attrs, existing, sort;
+ var at = options.at;
+ var sortable = this.comparator && (at == null) && options.sort !== false;
+ var sortAttr = _.isString(this.comparator) ? this.comparator : null;
+ var toAdd = [], toRemove = [], modelMap = {};
+
+
+
+
+
+
+
+
+ ¶
+
+ Turn bare objects into model references, and prevent invalid models
from being added.
-
-
- for (i = 0, l = models.length; i < l; i++) {
- if (!(model = this._prepareModel(attrs = models[i], options))) continue;
-
-
+
+
+ for (i = 0, l = models.length; i < l; i++) {
+ if (!(model = this._prepareModel(models[i], options))) continue;
+
+
-If a duplicate is found, prevent it from being added and
+
+
+
+
+ ¶
+
+ If a duplicate is found, prevent it from being added and
optionally merge it into the existing model.
-
-
- if (existing = this.get(model)) {
- modelMap[existing.cid] = true;
- if (options.merge && model !== existing) {
- existing.set(model === attrs ? model.attributes : attrs, options);
- if (sort && !doSort && existing.hasChanged(sortAttr)) doSort = true;
- }
- continue;
- }
-
- if (options.add === false) continue;
-
-
+
+
+ if (existing = this.get(model)) {
+ if (options.remove) modelMap[existing.cid] = true;
+ if (options.merge) {
+ existing.set(model.attributes, options);
+ if (sortable && !sort && existing.hasChanged(sortAttr)) sort = true;
+ }
+
+
-This is a new model, push it to the add list.
-
+
+
+
+ } else if (options.add) {
+ toAdd.push(model);
+
+
-Listen to added models' events, and index models for lookup by
+
+
+
+
+ ¶
+
+ Listen to added models' events, and index models for lookup by
id and by cid.
-
-
- model.on('all', this._onModelEvent, this);
- this._byId[model.cid] = model;
- if (model.id != null) this._byId[model.id] = model;
- }
-
- if (options.remove) {
- var remove = [];
- for (i = 0, l = this.length; i < l; ++i) {
- if (!modelMap[(model = this.models[i]).cid]) remove.push(model);
- }
- if (remove.length) this.remove(remove, options);
- }
-
-
+
+
+ model.on('all', this._onModelEvent, this);
+ this._byId[model.cid] = model;
+ if (model.id != null) this._byId[model.id] = model;
+ }
+ }
+
+
-See if sorting is needed, update length and splice in new models.
-
+
+
+
+
+ ¶
+
+ Remove nonexistent models if appropriate.
-
- if (add.length) {
- if (sort) doSort = true;
- this.length += add.length;
- if (at != null) {
- splice.apply(this.models, [at, 0].concat(add));
- } else {
- push.apply(this.models, add);
- }
- }
-
-
+
+
+ if (options.remove) {
+ for (i = 0, l = this.length; i < l; ++i) {
+ if (!modelMap[(model = this.models[i]).cid]) toRemove.push(model);
+ }
+ if (toRemove.length) this.remove(toRemove, options);
+ }
+
+
-Silently sort the collection if appropriate.
-
+
+
+
+
+ ¶
+
+ See if sorting is needed, update length and splice in new models.
-
- if (doSort) this.sort({silent: true});
-
- if (options.silent) return this;
-
-
+
+
+ if (toAdd.length) {
+ if (sortable) sort = true;
+ this.length += toAdd.length;
+ if (at != null) {
+ splice.apply(this.models, [at, 0].concat(toAdd));
+ } else {
+ push.apply(this.models, toAdd);
+ }
+ }
+
+
-Trigger add events.
-
+
+
+
+
+ ¶
+
+ Silently sort the collection if appropriate.
-
- for (i = 0, l = add.length; i < l; i++) {
- (model = add[i]).trigger('add', model, this, options);
- }
-
-
-
-
-Trigger sort if the collection was sorted.
+
+
+ if (sort) this.sort({silent: true});
+ if (options.silent) return this;
+
+
+
+
+
+
+
+
+ ¶
+
+ Trigger add events.
-
- if (doSort) this.trigger('sort', this, options);
-
- return this;
- },
-
-
+
+
+ for (i = 0, l = toAdd.length; i < l; i++) {
+ (model = toAdd[i]).trigger('add', model, this, options);
+ }
+
+
-Remove a model, or a list of models from the set.
-
+
+
+
+
+ ¶
+
+ Trigger sort if the collection was sorted.
-
- remove: function(models, options) {
- models = _.isArray(models) ? models.slice() : [models];
- options || (options = {});
- var i, l, index, model;
- for (i = 0, l = models.length; i < l; i++) {
- model = this.get(models[i]);
- if (!model) continue;
- delete this._byId[model.id];
- delete this._byId[model.cid];
- index = this.indexOf(model);
- this.models.splice(index, 1);
- this.length--;
- if (!options.silent) {
- options.index = index;
- model.trigger('remove', model, this, options);
- }
- this._removeReference(model);
- }
- return this;
- },
-
-
+
+
+ if (sort) this.trigger('sort', this, options);
+ return this;
+ },
+
+
-Add a model to the end of the collection.
-
+
+
+
+
+ ¶
+
+ 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.
-
- push: function(model, options) {
- model = this._prepareModel(model, options);
- this.add(model, _.extend({at: this.length}, options));
- return model;
- },
-
-
+
+
+ reset: function(models, options) {
+ options || (options = {});
+ for (var i = 0, l = this.models.length; i < l; i++) {
+ this._removeReference(this.models[i]);
+ }
+ options.previousModels = this.models;
+ this._reset();
+ this.add(models, _.extend({silent: true}, options));
+ if (!options.silent) this.trigger('reset', this, options);
+ return this;
+ },
+
+
-Remove a model from the end of the collection.
-
+
+
+
+
+ ¶
+
+ Add a model to the end of the collection.
-
- pop: function(options) {
- var model = this.at(this.length - 1);
- this.remove(model, options);
- return model;
- },
-
-
+
+
+ push: function(model, options) {
+ model = this._prepareModel(model, options);
+ this.add(model, _.extend({at: this.length}, options));
+ return model;
+ },
+
+
-Add a model to the beginning of the collection.
-
+
+
+
+
+ ¶
+
+ Remove a model from the end of the collection.
-
- unshift: function(model, options) {
- model = this._prepareModel(model, options);
- this.add(model, _.extend({at: 0}, options));
- return model;
- },
-
-
+
+
+ pop: function(options) {
+ var model = this.at(this.length - 1);
+ this.remove(model, options);
+ return model;
+ },
+
+
-Remove a model from the beginning of the collection.
-
+
+
+
+
+ ¶
+
+ Add a model to the beginning of the collection.
-
- shift: function(options) {
- var model = this.at(0);
- this.remove(model, options);
- return model;
- },
-
-
+
+
+ unshift: function(model, options) {
+ model = this._prepareModel(model, options);
+ this.add(model, _.extend({at: 0}, options));
+ return model;
+ },
+
+
-Slice out a sub-array of models from the collection.
-
+
+
+
+
+ ¶
+
+ Remove a model from the beginning of the collection.
-
- slice: function(begin, end) {
- return this.models.slice(begin, end);
- },
-
-
+
+
+ shift: function(options) {
+ var model = this.at(0);
+ this.remove(model, options);
+ return model;
+ },
+
+
-Get a model from the set by id.
-
+
+
+
+
+ ¶
+
+ Slice out a sub-array of models from the collection.
-
- get: function(obj) {
- if (obj == null) return void 0;
- return this._byId[obj.id != null ? obj.id : obj.cid || obj];
- },
-
-
+
+
+ slice: function(begin, end) {
+ return this.models.slice(begin, end);
+ },
+
+
-Get the model at the given index.
-
+
+
+
+
+ ¶
+
+ Get a model from the set by id.
-
- at: function(index) {
- return this.models[index];
- },
-
-
+
+
+ get: function(obj) {
+ if (obj == null) return void 0;
+ return this._byId[obj.id != null ? obj.id : obj.cid || obj];
+ },
+
+
-Return models with matching attributes. Useful for simple cases of
+
+
+
+
+ ¶
+
+ Get the model at the given index.
+
+
+
+
+ at: function(index) {
+ return this.models[index];
+ },
+
+
+
+
+
+
+
+
+ ¶
+
+ Return models with matching attributes. Useful for simple cases of
filter.
-
-
- where: function(attrs, first) {
- if (_.isEmpty(attrs)) return first ? void 0 : [];
- return this[first ? 'find' : 'filter'](function(model) {
- for (var key in attrs) {
- if (attrs[key] !== model.get(key)) return false;
- }
- return true;
- });
- },
-
-
+
+
+ where: function(attrs, first) {
+ if (_.isEmpty(attrs)) return first ? void 0 : [];
+ return this[first ? 'find' : 'filter'](function(model) {
+ for (var key in attrs) {
+ if (attrs[key] !== model.get(key)) return false;
+ }
+ return true;
+ });
+ },
+
+
-Return the first model with matching attributes. Useful for simple cases
+
+
+
+
+ ¶
+
+ Return the first model with matching attributes. Useful for simple cases
of find.
-
-
- findWhere: function(attrs) {
- return this.where(attrs, true);
- },
-
-
+
+
+ findWhere: function(attrs) {
+ return this.where(attrs, true);
+ },
+
+
-Force the collection to re-sort itself. You don't need to call this under
+
+
+
+
+ ¶
+
+ 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) {
- if (!this.comparator) {
- throw new Error('Cannot sort a set without a comparator');
- }
- options || (options = {});
-
-
+
+
+ sort: function(options) {
+ if (!this.comparator) throw new Error('Cannot sort a set without a comparator');
+ options || (options = {});
+
+
-Run sort based on type of comparator.
-
+
+
+
+
+ ¶
+
+ Run sort based on type of comparator.
-
- if (_.isString(this.comparator) || this.comparator.length === 1) {
- this.models = this.sortBy(this.comparator, this);
- } else {
- this.models.sort(_.bind(this.comparator, this));
- }
+
+
+ if (_.isString(this.comparator) || this.comparator.length === 1) {
+ this.models = this.sortBy(this.comparator, this);
+ } else {
+ this.models.sort(_.bind(this.comparator, this));
+ }
- if (!options.silent) this.trigger('sort', this, options);
- return this;
- },
-
-
+ if (!options.silent) this.trigger('sort', this, options);
+ return this;
+ },
+
+
-Pluck an attribute from each model in the collection.
-
+
+
+
+
+ ¶
+
+ Figure out the smallest index at which a model should be inserted so as
+to maintain order.
-
- pluck: function(attr) {
- return _.invoke(this.models, 'get', attr);
- },
-
-
+
+
+ sortedIndex: function(model, value, context) {
+ value || (value = this.comparator);
+ var iterator = _.isFunction(value) ? value : function(model) {
+ return model.get(value);
+ };
+ return _.sortedIndex(this.models, model, iterator, context);
+ },
+
+
-Smartly update a collection with a change set of models, adding,
-removing, and merging as necessary.
-
+
+
+
+
+ ¶
+
+ Pluck an attribute from each model in the collection.
-
- update: function(models, options) {
- options = _.extend({merge: true, remove: true}, options);
- if (options.parse) models = this.parse(models, options);
- this.add(models, options);
- return this;
- },
-
-
+
+
+ pluck: function(attr) {
+ return _.invoke(this.models, '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 add or remove events. Fires reset when finished.
-
+
+
+
+
+ ¶
+
+ 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.
-
- reset: function(models, options) {
- options = options ? _.clone(options) : {};
- if (options.parse) models = this.parse(models, options);
- for (var i = 0, l = this.models.length; i < l; i++) {
- this._removeReference(this.models[i]);
- }
- options.previousModels = this.models;
- this._reset();
- if (models) this.add(models, _.extend({silent: true}, options));
- if (!options.silent) this.trigger('reset', this, options);
- return this;
- },
-
-
+
+
+ fetch: function(options) {
+ options = options ? _.clone(options) : {};
+ if (options.parse === void 0) options.parse = true;
+ var success = options.success;
+ var collection = this;
+ options.success = function(resp) {
+ var method = options.reset ? 'reset' : 'set';
+ collection[method](resp, options);
+ if (success) success(collection, resp, options);
+ collection.trigger('sync', collection, resp, options);
+ };
+ wrapError(this, options);
+ return this.sync('read', this, options);
+ },
+
+
-Fetch the default set of models for this collection, resetting the
-collection when they arrive. If update: true is passed, the response
-data will be passed through the update method instead of reset.
-
-
-
-
- fetch: function(options) {
- options = options ? _.clone(options) : {};
- if (options.parse === void 0) options.parse = true;
- var success = options.success;
- var collection = this;
- options.success = function(resp) {
- var method = options.update ? 'update' : 'reset';
- collection[method](resp, options);
- if (success) success(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
+
+
+
+
+ ¶
+
+ 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) : {};
- if (!(model = this._prepareModel(model, options))) return false;
- if (!options.wait) this.add(model, options);
- var collection = this;
- var success = options.success;
- options.success = function(resp) {
- if (options.wait) collection.add(model, options);
- if (success) success(model, resp, options);
- };
- model.save(null, options);
- return model;
- },
-
-
+
+
+ create: function(model, options) {
+ options = options ? _.clone(options) : {};
+ if (!(model = this._prepareModel(model, options))) return false;
+ if (!options.wait) this.add(model, options);
+ var collection = this;
+ var success = options.success;
+ options.success = function(resp) {
+ if (options.wait) collection.add(model, options);
+ if (success) success(model, resp, options);
+ };
+ model.save(null, options);
+ return model;
+ },
+
+
-parse converts a response into a list of models to be added to the
+
+
+
+
+ ¶
+
+ 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;
- },
-
-
+
+
+ parse: function(resp, options) {
+ return resp;
+ },
+
+
-Create a new collection with an identical list of models as this one.
-
+
+
+
+
+ ¶
+
+ Create a new collection with an identical list of models as this one.
-
- clone: function() {
- return new this.constructor(this.models);
- },
-
-
+
+
+ clone: function() {
+ return new this.constructor(this.models);
+ },
+
+
-Reset all internal state. Called when the collection is reset.
-
+
+
+
+
+ ¶
+
+ 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 = {};
- },
-
-
+
+
+ _reset: function() {
+ this.length = 0;
+ this.models = [];
+ this._byId = {};
+ },
+
+
-Prepare a model or hash of attributes to be added to this collection.
-
+
+
+
+
+ ¶
+
+ Prepare a hash of attributes (or other model) to be added to this
+collection.
-
- _prepareModel: function(attrs, options) {
- if (attrs instanceof Model) {
- if (!attrs.collection) attrs.collection = this;
- return attrs;
- }
- options || (options = {});
- options.collection = this;
- var model = new this.model(attrs, options);
- if (!model._validate(attrs, options)) {
- this.trigger('invalid', this, attrs, options);
- return false;
- }
- return model;
- },
-
-
+
+
+ _prepareModel: function(attrs, options) {
+ if (attrs instanceof Model) {
+ if (!attrs.collection) attrs.collection = this;
+ return attrs;
+ }
+ options || (options = {});
+ options.collection = this;
+ var model = new this.model(attrs, options);
+ if (!model._validate(attrs, options)) {
+ this.trigger('invalid', this, attrs, options);
+ return false;
+ }
+ return model;
+ },
+
+
-Internal method to remove a model's ties to a collection.
-
+
+
+
+
+ ¶
+
+ Internal method to sever a model's ties to a collection.
-
- _removeReference: function(model) {
- if (this === model.collection) delete model.collection;
- model.off('all', this._onModelEvent, this);
- },
-
-
+
+
+ _removeReference: function(model) {
+ 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.
+
+
+
+
+ ¶
+
+ 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 ((event === 'add' || event === 'remove') && collection !== this) return;
- if (event === 'destroy') this.remove(model, options);
- if (model && event === 'change:' + model.idAttribute) {
- delete this._byId[model.previous(model.idAttribute)];
- if (model.id != null) this._byId[model.id] = model;
- }
- this.trigger.apply(this, arguments);
- },
+
+
+ _onModelEvent: function(event, model, collection, options) {
+ if ((event === 'add' || event === 'remove') && collection !== this) return;
+ if (event === 'destroy') this.remove(model, options);
+ if (model && event === 'change:' + model.idAttribute) {
+ delete this._byId[model.previous(model.idAttribute)];
+ if (model.id != null) this._byId[model.id] = model;
+ }
+ this.trigger.apply(this, arguments);
+ }
- sortedIndex: function (model, value, context) {
- value || (value = this.comparator);
- var iterator = _.isFunction(value) ? value : function(model) {
- return model.get(value);
- };
- return _.sortedIndex(this.models, model, iterator, context);
- }
-
- });
-
-
+ });
+
+
-Underscore methods that we want to implement on the Collection.
-
+
+
+
+
+ ¶
+
+ Underscore methods that we want to implement on the Collection.
+90% of the core usefulness of Backbone Collections is actually implemented
+right here:
-
- var methods = ['forEach', 'each', 'map', 'collect', 'reduce', 'foldl',
- 'inject', 'reduceRight', 'foldr', 'find', 'detect', 'filter', 'select',
- 'reject', 'every', 'all', 'some', 'any', 'include', 'contains', 'invoke',
- 'max', 'min', 'toArray', 'size', 'first', 'head', 'take', 'initial', 'rest',
- 'tail', 'drop', 'last', 'without', 'indexOf', 'shuffle', 'lastIndexOf',
- 'isEmpty', 'chain'];
-
-
+
+
+ var methods = ['forEach', 'each', 'map', 'collect', 'reduce', 'foldl',
+ 'inject', 'reduceRight', 'foldr', 'find', 'detect', 'filter', 'select',
+ 'reject', 'every', 'all', 'some', 'any', 'include', 'contains', 'invoke',
+ 'max', 'min', 'toArray', 'size', 'first', 'head', 'take', 'initial', 'rest',
+ 'tail', 'drop', 'last', 'without', 'indexOf', 'shuffle', 'lastIndexOf',
+ 'isEmpty', 'chain'];
+
+
-Mix in each Underscore method as a proxy to Collection#models.
-
+
+
+
+
+ ¶
+
+ Mix in each Underscore method as a proxy to Collection#models.
-
- _.each(methods, function(method) {
- Collection.prototype[method] = function() {
- var args = slice.call(arguments);
- args.unshift(this.models);
- return _[method].apply(_, args);
- };
- });
-
-
+
+
+ _.each(methods, function(method) {
+ Collection.prototype[method] = function() {
+ var args = slice.call(arguments);
+ args.unshift(this.models);
+ return _[method].apply(_, args);
+ };
+ });
+
+
-Underscore methods that take a property name as an argument.
-
+
+
+
+
+ ¶
+
+ Underscore methods that take a property name as an argument.
-
- var attributeMethods = ['groupBy', 'countBy', 'sortBy'];
-
-
+
+
+ var attributeMethods = ['groupBy', 'countBy', 'sortBy'];
+
+
-Use attributes instead of properties.
-
+
+
+
+
+ ¶
+
+ Use attributes instead of properties.
-
- _.each(attributeMethods, function(method) {
- Collection.prototype[method] = function(value, context) {
- var iterator = _.isFunction(value) ? value : function(model) {
- return model.get(value);
- };
- return _[method](this.models, iterator, context);
- };
- });
-
-
+
+
+ _.each(attributeMethods, function(method) {
+ Collection.prototype[method] = function(value, context) {
+ var iterator = _.isFunction(value) ? value : function(model) {
+ return model.get(value);
+ };
+ return _[method](this.models, iterator, context);
+ };
+ });
+
+
-Backbone.Router
+
+
+
+
+ ¶
+
+ Backbone.View
-
-
+
+
+
-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 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.
-
-
- 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 = /[\-{}\[\]+?.,\\\^$|#\s]/g;
-
-
-
-
-Set up all inheritable Backbone.Router properties and methods.
-
-
-
-
- _.extend(Router.prototype, Events, {
-
-
-
-
-Initialize is an empty function by default. Override it with your own
-initialization logic.
-
-
-
-
- initialize: function(){},
-
-
-
-
-Manually bind a single named route to a callback. For example:
-
-
-this.route('search/:query/p:num', 'search', function(query, num) {
- ...
-});
-
-
- route: function(route, name, callback) {
- if (!_.isRegExp(route)) route = this._routeToRegExp(route);
- if (!callback) callback = this[name];
- Backbone.history.route(route, _.bind(function(fragment) {
- var args = this._extractParameters(route, fragment);
- callback && callback.apply(this, args);
- this.trigger.apply(this, ['route:' + name].concat(args));
- this.trigger('route', name, args);
- Backbone.history.trigger('route', this, name, args);
- }, this));
- return this;
- },
-
-
-
-
-Simple proxy to Backbone.history to save a fragment into the history.
-
-
-
-
- navigate: function(fragment, options) {
- Backbone.history.navigate(fragment, options);
- return this;
- },
-
-
-
-
-Bind all defined routes to Backbone.history. We have to reverse the
-order of the routes here to support behavior where the most general
-routes can be defined at the bottom of the route map.
-
-
-
-
- _bindRoutes: function() {
- if (!this.routes) return;
- var route, routes = _.keys(this.routes);
- while ((route = routes.pop()) != null) {
- this.route(route, this.routes[route]);
- }
- },
-
-
-
-
-Convert a route string into a regular expression, suitable for matching
-against the current location hash.
-
-
-
-
- _routeToRegExp: function(route) {
- route = route.replace(escapeRegExp, '\\$&')
- .replace(optionalParam, '(?:$1)?')
- .replace(namedParam, function(match, optional){
- return optional ? match : '([^\/]+)';
- })
- .replace(splatParam, '(.*?)');
- return new RegExp('^' + route + '$');
- },
-
-
-
-
-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.
-
-
-
-
- var History = Backbone.History = function() {
- this.handlers = [];
- _.bindAll(this, 'checkUrl');
-
-
-
-
-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 detecting MSIE.
-
-
-
-
- var isExplorer = /msie [\w.]+/;
-
-
-
-
-Cached regex for removing a trailing slash.
-
-
-
-
- var trailingSlash = /\/$/;
-
-
-
-
-Has the history handling already been started?
-
-
-
-
- History.started = false;
-
-
-
-
-Set up all inheritable Backbone.History properties and methods.
-
-
-
-
- _.extend(History.prototype, Events, {
-
-
-
-
-The default interval to poll for hash changes, if necessary, is
-twenty times a second.
-
-
-
-
- interval: 50,
-
-
-
-
-Gets the true hash value. Cannot use location.hash directly due to bug
-in Firefox where location.hash will always be decoded.
-
-
-
-
- getHash: function(window) {
- var match = (window || this).location.href.match(/#(.*)$/);
- return match ? match[1] : '';
- },
-
-
-
-
-Get the cross-browser normalized URL fragment, either from the URL,
-the hash, or the override.
-
-
-
-
- getFragment: function(fragment, forcePushState) {
- if (fragment == null) {
- if (this._hasPushState || !this._wantsHashChange || forcePushState) {
- fragment = this.location.pathname;
- var root = this.root.replace(trailingSlash, '');
- if (!fragment.indexOf(root)) fragment = fragment.substr(root.length);
- } 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._wantsPushState = !!this.options.pushState;
- this._hasPushState = !!(this.options.pushState && this.history && this.history.pushState);
- var fragment = this.getFragment();
- var docMode = document.documentMode;
- var oldIE = (isExplorer.exec(navigator.userAgent.toLowerCase()) && (!docMode || docMode <= 7));
-
-
-
-
-Normalize root to always include a leading and trailing slash.
-
-
-
-
- this.root = ('/' + this.root + '/').replace(rootStripper, '/');
-
- if (oldIE && this._wantsHashChange) {
- this.iframe = Backbone.$('<iframe src="javascript:0" tabindex="-1" />').hide().appendTo('body')[0].contentWindow;
- this.navigate(fragment);
- }
-
-
-
-
-Depending on whether we're using pushState or hashes, and whether
-'onhashchange' is supported, determine how we check the URL state.
-
-
-
-
- if (this._hasPushState) {
- Backbone.$(window).on('popstate', this.checkUrl);
- } else if (this._wantsHashChange && ('onhashchange' in window) && !oldIE) {
- Backbone.$(window).on('hashchange', this.checkUrl);
- } else if (this._wantsHashChange) {
- this._checkUrlInterval = setInterval(this.checkUrl, this.interval);
- }
-
-
-
-
-Determine if we need to change the base url, for a pushState link
-opened by a non-pushState browser.
-
-
-
-
- this.fragment = fragment;
- var loc = this.location;
- var atRoot = loc.pathname.replace(/[^\/]$/, '$&/') === this.root;
-
-
-
-
-If we've started off with a route from a pushState-enabled browser,
-but we're currently in a browser that doesn't support it...
-
-
-
-
- if (this._wantsHashChange && this._wantsPushState && !this._hasPushState && !atRoot) {
- this.fragment = this.getFragment(null, true);
- this.location.replace(this.root + this.location.search + '#' + this.fragment);
-
-
-
-
-Return immediately as browser will do redirect to new url
-
-
-
-
- return true;
-
-
-
-
-Or if we've started out with a hash-based route, but we're currently
-in a browser where it could be pushState-based instead...
-
-
-
-
- } else if (this._wantsPushState && this._hasPushState && atRoot && loc.hash) {
- this.fragment = this.getHash().replace(routeStripper, '');
- this.history.replaceState({}, document.title, this.root + this.fragment + loc.search);
- }
-
- if (!this.options.silent) return this.loadUrl();
- },
-
-
-
-
-Disable Backbone.history, perhaps temporarily. Not useful in a real app,
-but possibly useful for unit testing Routers.
-
-
-
-
- stop: function() {
- Backbone.$(window).off('popstate', this.checkUrl).off('hashchange', this.checkUrl);
- 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 (current === this.fragment && this.iframe) {
- current = this.getFragment(this.getHash(this.iframe));
- }
- if (current === this.fragment) return false;
- if (this.iframe) this.navigate(current);
- this.loadUrl() || this.loadUrl(this.getHash());
- },
-
-
-
-
-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, 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};
- fragment = this.getFragment(fragment || '');
- if (this.fragment === fragment) return;
- this.fragment = fragment;
- var url = this.root + fragment;
-
-
-
-
-If pushState is available, we use it to set the fragment as a real URL.
-
-
-
-
- if (this._hasPushState) {
- 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.getFragment(this.getHash(this.iframe)))) {
-
-
-
-
-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) this.iframe.document.open().close();
- this._updateHash(this.iframe.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) 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:|#).*$/, '');
- location.replace(href + '#' + fragment);
- } else {
-
-
-
-
-Some browsers require that hash contains a leading #.
-
-
-
-
- location.hash = '#' + fragment;
- }
- }
-
- });
-
-
-
-
-Create the default Backbone.history.
-
-
-
-
- Backbone.history = new History;
-
-
-
-
-Backbone.View
-
-
-
-
-
Creating a Backbone.View creates its initial element outside of the DOM,
if an existing element is not provided...
-
-
- var View = Backbone.View = function(options) {
- this.cid = _.uniqueId('view');
- this._configure(options || {});
- this._ensureElement();
- this.initialize.apply(this, arguments);
- this.delegateEvents();
- };
-
-
+
+
+ var View = Backbone.View = function(options) {
+ this.cid = _.uniqueId('view');
+ this._configure(options || {});
+ this._ensureElement();
+ this.initialize.apply(this, arguments);
+ this.delegateEvents();
+ };
+
+
-Cached regex to split keys for delegate.
-
+
+
+
+
+ ¶
+
+ Cached regex to split keys for delegate.
-
- var delegateEventSplitter = /^(\S+)\s*(.*)$/;
-
-
+
+
+ var delegateEventSplitter = /^(\S+)\s*(.*)$/;
+
+
-List of view options to be merged as properties.
-
+
+
+
+
+ ¶
+
+ List of view options to be merged as properties.
-
- var viewOptions = ['model', 'collection', 'el', 'id', 'attributes', 'className', 'tagName', 'events'];
-
-
+
+
+ var viewOptions = ['model', 'collection', 'el', 'id', 'attributes', 'className', 'tagName', 'events'];
+
+
-Set up all inheritable Backbone.View properties and methods.
-
+
+
+
+
+ ¶
+
+ Set up all inheritable Backbone.View properties and methods.
-
- _.extend(View.prototype, Events, {
-
-
+
+
+ _.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
+
+
+
+
+ ¶
+
+ jQuery delegate for element lookup, scoped to DOM elements within the
current view. This should be prefered to global lookups where possible.
-
-
- $: function(selector) {
- return this.$el.find(selector);
- },
-
-
+
+
+ $: function(selector) {
+ return this.$el.find(selector);
+ },
+
+
-Initialize is an empty function by default. Override it with your own
+
+
+
+
+ ¶
+
+ Initialize is an empty function by default. Override it with your own
initialization logic.
-
-
- initialize: function(){},
-
-
+
+
+ initialize: function(){},
+
+
-render is the core function that your view should override, in order
+
+
+
+
+ ¶
+
+ 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;
- },
-
-
+
+
+ render: function() {
+ return this;
+ },
+
+
-Remove this view by taking the element out of the DOM, and removing any
+
+
+
+
+ ¶
+
+ Remove this view by taking the element out of the DOM, and removing any
applicable Backbone.Events listeners.
-
-
- remove: function() {
- this.$el.remove();
- this.stopListening();
- return this;
- },
-
-
+
+
+ remove: function() {
+ this.$el.remove();
+ this.stopListening();
+ return this;
+ },
+
+
-Change the view's element (this.el property), including event
+
+
+
+
+ ¶
+
+ Change the view's element (this.el property), including event
re-delegation.
-
-
- setElement: function(element, delegate) {
- if (this.$el) this.undelegateEvents();
- this.$el = element instanceof Backbone.$ ? element : Backbone.$(element);
- this.el = this.$el[0];
- if (delegate !== false) this.delegateEvents();
- return this;
- },
-
-
+
+
+ setElement: function(element, delegate) {
+ if (this.$el) this.undelegateEvents();
+ this.$el = element instanceof Backbone.$ ? element : Backbone.$(element);
+ this.el = this.$el[0];
+ if (delegate !== false) this.delegateEvents();
+ return this;
+ },
+
+
-Set callbacks, where this.events is a hash of
+
+
+
+
+ ¶
+
+ Set callbacks, where this.events is a hash of
{"event selector": "callback"}
@@ -2456,113 +2743,129 @@ 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 = _.result(this, 'events')))) return this;
- this.undelegateEvents();
- for (var key in events) {
- var method = events[key];
- if (!_.isFunction(method)) method = this[events[key]];
- if (!method) throw new Error('Method "' + events[key] + '" does not exist');
- var match = key.match(delegateEventSplitter);
- var eventName = match[1], selector = match[2];
- method = _.bind(method, this);
- eventName += '.delegateEvents' + this.cid;
- if (selector === '') {
- this.$el.on(eventName, method);
- } else {
- this.$el.on(eventName, selector, method);
- }
- }
- return this;
- },
-
-
+
+
+ delegateEvents: function(events) {
+ if (!(events || (events = _.result(this, 'events')))) return this;
+ this.undelegateEvents();
+ for (var key in events) {
+ var method = events[key];
+ if (!_.isFunction(method)) method = this[events[key]];
+ if (!method) continue;
+
+ var match = key.match(delegateEventSplitter);
+ var eventName = match[1], selector = match[2];
+ method = _.bind(method, this);
+ eventName += '.delegateEvents' + this.cid;
+ if (selector === '') {
+ this.$el.on(eventName, method);
+ } else {
+ this.$el.on(eventName, selector, method);
+ }
+ }
+ return this;
+ },
+
+
-Clears all callbacks previously bound to the view with delegateEvents.
+
+
+
+
+ ¶
+
+ Clears all callbacks previously bound to the view with 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() {
- this.$el.off('.delegateEvents' + this.cid);
- return this;
- },
-
-
+
+
+ undelegateEvents: function() {
+ this.$el.off('.delegateEvents' + this.cid);
+ return this;
+ },
+
+
-Performs the initial configuration of a View with a set of options.
+
+
+
+
+ ¶
+
+ Performs the initial configuration of a View with a set of options.
Keys with special meaning (e.g. model, collection, id, className) are
attached directly to the view. See viewOptions for an exhaustive
list.
-
-
- _configure: function(options) {
- if (this.options) options = _.extend({}, _.result(this, 'options'), options);
- _.extend(this, _.pick(options, viewOptions));
- this.options = options;
- },
-
-
+
+
+ _configure: function(options) {
+ if (this.options) options = _.extend({}, _.result(this, 'options'), options);
+ _.extend(this, _.pick(options, viewOptions));
+ this.options = options;
+ },
+
+
-Ensure that the View has a DOM element to render into.
+
+
+
+
+ ¶
+
+ 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');
- var $el = Backbone.$('<' + _.result(this, 'tagName') + '>').attr(attrs);
- this.setElement($el, false);
- } else {
- this.setElement(_.result(this, 'el'), false);
- }
- }
+
+
+ _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');
+ var $el = Backbone.$('<' + _.result(this, 'tagName') + '>').attr(attrs);
+ this.setElement($el, false);
+ } else {
+ this.setElement(_.result(this, 'el'), false);
+ }
+ }
- });
-
-
+ });
+
+
-Backbone.sync
+
+
+
+
+ ¶
+
+ Backbone.sync
-
-
+
+
+
-Map from CRUD to HTTP for our default Backbone.sync implementation.
-
-
-
-
- var methodMap = {
- 'create': 'POST',
- 'update': 'PUT',
- 'patch': 'PATCH',
- 'delete': 'DELETE',
- 'read': 'GET'
- };
-
-
-
-
-Override this function to change the manner in which Backbone persists
+
+
+
+
+ ¶
+
+ 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:
@@ -2579,258 +2882,1271 @@ 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];
-
-
+
+
+ Backbone.sync = function(method, model, options) {
+ var type = methodMap[method];
+
+
-Default options, unless specified.
-
+
+
+
+
+ ¶
+
+ Default options, unless specified.
-
- _.defaults(options || (options = {}), {
- emulateHTTP: Backbone.emulateHTTP,
- emulateJSON: Backbone.emulateJSON
- });
-
-
+
+
+ _.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.
-
+
+
+
+
+ ¶
+
+ Ensure that we have a URL.
-
- if (!options.url) {
- params.url = _.result(model, 'url') || urlError();
- }
-
-
+
+
+ if (!options.url) {
+ params.url = _.result(model, 'url') || urlError();
+ }
+
+
-Ensure that we have the appropriate request data.
-
+
+
+
+
+ ¶
+
+ 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));
- }
-
-
+
+
+ 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.
-
+
+
+
+
+ ¶
+
+ 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} : {};
- }
-
-
+
+
+ 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
+
+
+
+
+ ¶
+
+ 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);
- };
- }
-
-
+
+
+ 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.
-
+
+
+
+
+ ¶
+
+ Don't process data on a non-GET request.
-
- if (params.type !== 'GET' && !options.emulateJSON) {
- params.processData = false;
- }
-
-
+
+
+ if (params.type !== 'GET' && !options.emulateJSON) {
+ params.processData = false;
+ }
+
+
-Make the request, allowing the user to override any Ajax options.
-
+
+
+
+
+ ¶
+
+ If we're sending a PATCH request, and we're in an old Internet Explorer
+that still has ActiveX enabled by default, override jQuery to use that
+for XHR instead. Remove this line when jQuery supports PATCH on IE8.
-
- var xhr = options.xhr = Backbone.ajax(_.extend(params, options));
- model.trigger('request', model, xhr, options);
- return xhr;
- };
-
-
+
+
+ if (params.type === 'PATCH' && window.ActiveXObject &&
+ !(window.external && window.external.msActiveXFilteringEnabled)) {
+ params.xhr = function() {
+ return new ActiveXObject("Microsoft.XMLHTTP");
+ };
+ }
+
+
-Set the default implementation of Backbone.ajax to proxy through to $.
-
+
+
+
+
+ ¶
+
+ Make the request, allowing the user to override any Ajax options.
-
- Backbone.ajax = function() {
- return Backbone.$.ajax.apply(Backbone.$, arguments);
- };
-
-
+
+
+ var xhr = options.xhr = Backbone.ajax(_.extend(params, options));
+ model.trigger('request', model, xhr, options);
+ return xhr;
+ };
+
+
-Helpers
+
+
+
+
+ ¶
+
+ Map from CRUD to HTTP for our default Backbone.sync implementation.
+
-
-
+
+
+ var methodMap = {
+ 'create': 'POST',
+ 'update': 'PUT',
+ 'patch': 'PATCH',
+ 'delete': 'DELETE',
+ 'read': 'GET'
+ };
+
+
-Helper function to correctly set up the prototype chain, for subclasses.
+
+
+
+
+ ¶
+
+ 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 = /[\-{}\[\]+?.,\\\^$|#\s]/g;
+
+
+
+
+
+
+
+
+ ¶
+
+ Set up all inheritable Backbone.Router properties and methods.
+
+
+
+
+ _.extend(Router.prototype, Events, {
+
+
+
+
+
+
+
+
+ ¶
+
+ Initialize is an empty function by default. Override it with your own
+initialization logic.
+
+
+
+
+ initialize: function(){},
+
+
+
+
+
+
+
+
+ ¶
+
+ Manually bind a single named route to a callback. For example:
+
+
+this.route('search/:query/p:num', 'search', function(query, num) {
+ ...
+});
+
+
+
+ route: function(route, name, callback) {
+ if (!_.isRegExp(route)) route = this._routeToRegExp(route);
+ if (_.isFunction(name)) {
+ callback = name;
+ name = '';
+ }
+ if (!callback) callback = this[name];
+ var router = this;
+ Backbone.history.route(route, function(fragment) {
+ var args = router._extractParameters(route, fragment);
+ callback && callback.apply(router, args);
+ router.trigger.apply(router, ['route:' + name].concat(args));
+ router.trigger('route', name, args);
+ Backbone.history.trigger('route', router, name, args);
+ });
+ return this;
+ },
+
+
+
+
+
+
+
+
+ ¶
+
+ Simple proxy to Backbone.history to save a fragment into the history.
+
+
+
+
+ navigate: function(fragment, options) {
+ Backbone.history.navigate(fragment, options);
+ return this;
+ },
+
+
+
+
+
+
+
+
+ ¶
+
+ Bind all defined routes to Backbone.history. We have to reverse the
+order of the routes here to support behavior where the most general
+routes can be defined at the bottom of the route map.
+
+
+
+
+ _bindRoutes: function() {
+ if (!this.routes) return;
+ this.routes = _.result(this, 'routes');
+ var route, routes = _.keys(this.routes);
+ while ((route = routes.pop()) != null) {
+ this.route(route, this.routes[route]);
+ }
+ },
+
+
+
+
+
+
+
+
+ ¶
+
+ Convert a route string into a regular expression, suitable for matching
+against the current location hash.
+
+
+
+
+ _routeToRegExp: function(route) {
+ route = route.replace(escapeRegExp, '\\$&')
+ .replace(optionalParam, '(?:$1)?')
+ .replace(namedParam, function(match, optional){
+ return optional ? match : '([^\/]+)';
+ })
+ .replace(splatParam, '(.*?)');
+ return new RegExp('^' + route + '$');
+ },
+
+
+
+
+
+
+
+
+ ¶
+
+ 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) {
+ return param ? decodeURIComponent(param) : null;
+ });
+ }
+
+ });
+
+
+
+
+
+
+
+
+ ¶
+
+ Backbone.History
+
+
+
+
+
+
+
+
+
+
+ ¶
+
+ Handles cross-browser history management, based on either
+pushState and real URLs, or
+onhashchange
+and URL fragments. If the browser supports neither (old IE, natch),
+falls back to polling.
+
+
+
+
+ var History = Backbone.History = function() {
+ this.handlers = [];
+ _.bindAll(this, 'checkUrl');
+
+
+
+
+
+
+
+
+ ¶
+
+ 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 detecting MSIE.
+
+
+
+
+ var isExplorer = /msie [\w.]+/;
+
+
+
+
+
+
+
+
+ ¶
+
+ Cached regex for removing a trailing slash.
+
+
+
+
+ var trailingSlash = /\/$/;
+
+
+
+
+
+
+
+
+ ¶
+
+ Has the history handling already been started?
+
+
+
+
+ History.started = false;
+
+
+
+
+
+
+
+
+ ¶
+
+ Set up all inheritable Backbone.History properties and methods.
+
+
+
+
+ _.extend(History.prototype, Events, {
+
+
+
+
+
+
+
+
+ ¶
+
+ The default interval to poll for hash changes, if necessary, is
+twenty times a second.
+
+
+
+
+ interval: 50,
+
+
+
+
+
+
+
+
+ ¶
+
+ Gets the true hash value. Cannot use location.hash directly due to bug
+in Firefox where location.hash will always be decoded.
+
+
+
+
+ getHash: function(window) {
+ var match = (window || this).location.href.match(/#(.*)$/);
+ return match ? match[1] : '';
+ },
+
+
+
+
+
+
+
+
+ ¶
+
+ Get the cross-browser normalized URL fragment, either from the URL,
+the hash, or the override.
+
+
+
+
+ getFragment: function(fragment, forcePushState) {
+ if (fragment == null) {
+ if (this._hasPushState || !this._wantsHashChange || forcePushState) {
+ fragment = this.location.pathname;
+ var root = this.root.replace(trailingSlash, '');
+ if (!fragment.indexOf(root)) fragment = fragment.substr(root.length);
+ } 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._wantsPushState = !!this.options.pushState;
+ this._hasPushState = !!(this.options.pushState && this.history && this.history.pushState);
+ var fragment = this.getFragment();
+ var docMode = document.documentMode;
+ var oldIE = (isExplorer.exec(navigator.userAgent.toLowerCase()) && (!docMode || docMode <= 7));
+
+
+
+
+
+
+
+
+ ¶
+
+ Normalize root to always include a leading and trailing slash.
+
+
+
+
+ this.root = ('/' + this.root + '/').replace(rootStripper, '/');
+
+ if (oldIE && this._wantsHashChange) {
+ this.iframe = Backbone.$('<iframe src="javascript:0" tabindex="-1" />').hide().appendTo('body')[0].contentWindow;
+ this.navigate(fragment);
+ }
+
+
+
+
+
+
+
+
+ ¶
+
+ Depending on whether we're using pushState or hashes, and whether
+'onhashchange' is supported, determine how we check the URL state.
+
+
+
+
+ if (this._hasPushState) {
+ Backbone.$(window).on('popstate', this.checkUrl);
+ } else if (this._wantsHashChange && ('onhashchange' in window) && !oldIE) {
+ Backbone.$(window).on('hashchange', this.checkUrl);
+ } else if (this._wantsHashChange) {
+ this._checkUrlInterval = setInterval(this.checkUrl, this.interval);
+ }
+
+
+
+
+
+
+
+
+ ¶
+
+ Determine if we need to change the base url, for a pushState link
+opened by a non-pushState browser.
+
+
+
+
+ this.fragment = fragment;
+ var loc = this.location;
+ var atRoot = loc.pathname.replace(/[^\/]$/, '$&/') === this.root;
+
+
+
+
+
+
+
+
+ ¶
+
+ If we've started off with a route from a pushState-enabled browser,
+but we're currently in a browser that doesn't support it...
+
+
+
+
+ if (this._wantsHashChange && this._wantsPushState && !this._hasPushState && !atRoot) {
+ this.fragment = this.getFragment(null, true);
+ this.location.replace(this.root + this.location.search + '#' + this.fragment);
+
+
+
+
+
+
+
+
+ ¶
+
+ Return immediately as browser will do redirect to new url
+
+
+
+
+ return true;
+
+
+
+
+
+
+
+
+ ¶
+
+ Or if we've started out with a hash-based route, but we're currently
+in a browser where it could be pushState-based instead...
+
+
+
+
+ } else if (this._wantsPushState && this._hasPushState && atRoot && loc.hash) {
+ this.fragment = this.getHash().replace(routeStripper, '');
+ this.history.replaceState({}, document.title, this.root + this.fragment + loc.search);
+ }
+
+ if (!this.options.silent) return this.loadUrl();
+ },
+
+
+
+
+
+
+
+
+ ¶
+
+ Disable Backbone.history, perhaps temporarily. Not useful in a real app,
+but possibly useful for unit testing Routers.
+
+
+
+
+ stop: function() {
+ Backbone.$(window).off('popstate', this.checkUrl).off('hashchange', this.checkUrl);
+ 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 (current === this.fragment && this.iframe) {
+ current = this.getFragment(this.getHash(this.iframe));
+ }
+ if (current === this.fragment) return false;
+ if (this.iframe) this.navigate(current);
+ this.loadUrl() || this.loadUrl(this.getHash());
+ },
+
+
+
+
+
+
+
+
+ ¶
+
+ 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, 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};
+ fragment = this.getFragment(fragment || '');
+ if (this.fragment === fragment) return;
+ this.fragment = fragment;
+ var url = this.root + fragment;
+
+
+
+
+
+
+
+
+ ¶
+
+ If pushState is available, we use it to set the fragment as a real URL.
+
+
+
+
+ if (this._hasPushState) {
+ 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.getFragment(this.getHash(this.iframe)))) {
+
+
+
+
+
+
+
+
+ ¶
+
+ 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) this.iframe.document.open().close();
+ this._updateHash(this.iframe.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) 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;
-
-
+
+
+ var extend = function(protoProps, staticProps) {
+ var parent = this;
+ var child;
+
+
-The constructor function for the new subclass is either defined by you
+
+
+
+
+ ¶
+
+ The constructor function for the new subclass is either defined by you
(the "constructor" property in your extend definition), or defaulted
by us to simply call the parent's constructor.
-
-
- if (protoProps && _.has(protoProps, 'constructor')) {
- child = protoProps.constructor;
- } else {
- child = function(){ return parent.apply(this, arguments); };
- }
-
-
+
+
+ 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.
-
+
+
+
+
+ ¶
+
+ Add static properties to the constructor function, if supplied.
-
- _.extend(child, parent, staticProps);
-
-
+
+
+ _.extend(child, parent, staticProps);
+
+
-Set the prototype chain to inherit from parent, without calling
+
+
+
+
+ ¶
+
+ Set the prototype chain to inherit from parent, without calling
parent's constructor function.
-
-
- var Surrogate = function(){ this.constructor = child; };
- Surrogate.prototype = parent.prototype;
- child.prototype = new Surrogate;
-
-
+
+
+ var Surrogate = function(){ this.constructor = child; };
+ Surrogate.prototype = parent.prototype;
+ child.prototype = new Surrogate;
+
+
-Add prototype properties (instance properties) to the subclass,
+
+
+
+
+ ¶
+
+ Add prototype properties (instance properties) to the subclass,
if supplied.
-
-
- if (protoProps) _.extend(child.prototype, protoProps);
-
-
+
+
+ if (protoProps) _.extend(child.prototype, protoProps);
+
+
-Set a convenience property in case the parent's prototype is needed
+
+
+
+
+ ¶
+
+ Set a convenience property in case the parent's prototype is needed
later.
-
-
- child.__super__ = parent.prototype;
+
+
+ child.__super__ = parent.prototype;
- return child;
- };
-
-
+ return child;
+ };
+
+
-Set up inheritance for the model, collection, router, view and history.
-
+
+
+
+
+ ¶
+
+ Set up inheritance for the model, collection, router, view and history.
-
- Model.extend = Collection.extend = Router.extend = View.extend = History.extend = extend;
-
-
+
+
+ Model.extend = Collection.extend = Router.extend = View.extend = History.extend = extend;
+
+
-Throw an error when a URL is needed, and none is supplied.
-
+
+
+
+
+ ¶
+
+ 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');
- };
-
-
+
+
+ var urlError = function() {
+ throw new Error('A "url" property or function must be specified');
+ };
+
+
-Wrap an optional error callback with a fallback error event.
+
+
+
+
+ ¶
+
+ 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(model, resp, options);
- model.trigger('error', model, resp, options);
- };
- };
+
+
+ var wrapError = function (model, options) {
+ var error = options.error;
+ options.error = function(resp) {
+ if (error) error(model, resp, options);
+ model.trigger('error', model, resp, options);
+ };
+ };
-}).call(this);
-
-
+}).call(this);
+
+
-
- h
-