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1 | 8d08f18a | Kostas Papadimitriou | // Backbone.js 0.5.3
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2 | 8d08f18a | Kostas Papadimitriou | // (c) 2010 Jeremy Ashkenas, DocumentCloud Inc.
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3 | 8d08f18a | Kostas Papadimitriou | // Backbone may be freely distributed under the MIT license.
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4 | 8d08f18a | Kostas Papadimitriou | // For all details and documentation:
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5 | 8d08f18a | Kostas Papadimitriou | // http://documentcloud.github.com/backbone
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6 | 8d08f18a | Kostas Papadimitriou | |
7 | 8d08f18a | Kostas Papadimitriou | (function(){
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8 | 8d08f18a | Kostas Papadimitriou | |
9 | 8d08f18a | Kostas Papadimitriou | // Initial Setup
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10 | 8d08f18a | Kostas Papadimitriou | // -------------
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11 | 8d08f18a | Kostas Papadimitriou | |
12 | 8d08f18a | Kostas Papadimitriou | // Save a reference to the global object.
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13 | 8d08f18a | Kostas Papadimitriou | var root = this; |
14 | 8d08f18a | Kostas Papadimitriou | |
15 | 8d08f18a | Kostas Papadimitriou | // Save the previous value of the `Backbone` variable.
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16 | 8d08f18a | Kostas Papadimitriou | var previousBackbone = root.Backbone;
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17 | 8d08f18a | Kostas Papadimitriou | |
18 | 2f834e7d | Kostas Papadimitriou | // Create a local reference to slice.
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19 | 2f834e7d | Kostas Papadimitriou | var slice = Array.prototype.slice;
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20 | 2f834e7d | Kostas Papadimitriou | |
21 | 8d08f18a | Kostas Papadimitriou | // The top-level namespace. All public Backbone classes and modules will
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22 | 8d08f18a | Kostas Papadimitriou | // be attached to this. Exported for both CommonJS and the browser.
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23 | 8d08f18a | Kostas Papadimitriou | var Backbone;
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24 | 8d08f18a | Kostas Papadimitriou | if (typeof exports !== 'undefined') { |
25 | 8d08f18a | Kostas Papadimitriou | Backbone = exports; |
26 | 8d08f18a | Kostas Papadimitriou | } else {
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27 | 8d08f18a | Kostas Papadimitriou | Backbone = root.Backbone = {}; |
28 | 8d08f18a | Kostas Papadimitriou | } |
29 | 8d08f18a | Kostas Papadimitriou | |
30 | 8d08f18a | Kostas Papadimitriou | // Current version of the library. Keep in sync with `package.json`.
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31 | 8d08f18a | Kostas Papadimitriou | Backbone.VERSION = '0.5.3';
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32 | 8d08f18a | Kostas Papadimitriou | |
33 | 8d08f18a | Kostas Papadimitriou | // Require Underscore, if we're on the server, and it's not already present.
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34 | 8d08f18a | Kostas Papadimitriou | var _ = root._;
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35 | 8d08f18a | Kostas Papadimitriou | if (!_ && (typeof require !== 'undefined')) _ = require('underscore')._; |
36 | 8d08f18a | Kostas Papadimitriou | |
37 | 8d08f18a | Kostas Papadimitriou | // For Backbone's purposes, jQuery, Zepto, or Ender owns the `$` variable.
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38 | 8d08f18a | Kostas Papadimitriou | var $ = root.jQuery || root.Zepto || root.ender; |
39 | 8d08f18a | Kostas Papadimitriou | |
40 | 8d08f18a | Kostas Papadimitriou | // Runs Backbone.js in *noConflict* mode, returning the `Backbone` variable
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41 | 8d08f18a | Kostas Papadimitriou | // to its previous owner. Returns a reference to this Backbone object.
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42 | 8d08f18a | Kostas Papadimitriou | Backbone.noConflict = function() { |
43 | 8d08f18a | Kostas Papadimitriou | root.Backbone = previousBackbone; |
44 | 8d08f18a | Kostas Papadimitriou | return this; |
45 | 8d08f18a | Kostas Papadimitriou | }; |
46 | 8d08f18a | Kostas Papadimitriou | |
47 | 8d08f18a | Kostas Papadimitriou | // Turn on `emulateHTTP` to support legacy HTTP servers. Setting this option will
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48 | 8d08f18a | Kostas Papadimitriou | // fake `"PUT"` and `"DELETE"` requests via the `_method` parameter and set a
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49 | 8d08f18a | Kostas Papadimitriou | // `X-Http-Method-Override` header.
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50 | 8d08f18a | Kostas Papadimitriou | Backbone.emulateHTTP = false;
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51 | 8d08f18a | Kostas Papadimitriou | |
52 | 8d08f18a | Kostas Papadimitriou | // Turn on `emulateJSON` to support legacy servers that can't deal with direct
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53 | 8d08f18a | Kostas Papadimitriou | // `application/json` requests ... will encode the body as
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54 | 8d08f18a | Kostas Papadimitriou | // `application/x-www-form-urlencoded` instead and will send the model in a
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55 | 8d08f18a | Kostas Papadimitriou | // form param named `model`.
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56 | 8d08f18a | Kostas Papadimitriou | Backbone.emulateJSON = false;
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57 | 8d08f18a | Kostas Papadimitriou | |
58 | 8d08f18a | Kostas Papadimitriou | // Backbone.Events
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59 | 8d08f18a | Kostas Papadimitriou | // -----------------
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60 | 8d08f18a | Kostas Papadimitriou | |
61 | 8d08f18a | Kostas Papadimitriou | // A module that can be mixed in to *any object* in order to provide it with
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62 | 8d08f18a | Kostas Papadimitriou | // custom events. You may `bind` or `unbind` a callback function to an event;
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63 | 8d08f18a | Kostas Papadimitriou | // `trigger`-ing an event fires all callbacks in succession.
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64 | 8d08f18a | Kostas Papadimitriou | //
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65 | 8d08f18a | Kostas Papadimitriou | // var object = {};
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66 | 8d08f18a | Kostas Papadimitriou | // _.extend(object, Backbone.Events);
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67 | 8d08f18a | Kostas Papadimitriou | // object.bind('expand', function(){ alert('expanded'); });
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68 | 8d08f18a | Kostas Papadimitriou | // object.trigger('expand');
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69 | 8d08f18a | Kostas Papadimitriou | //
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70 | 8d08f18a | Kostas Papadimitriou | Backbone.Events = { |
71 | 8d08f18a | Kostas Papadimitriou | |
72 | 8d08f18a | Kostas Papadimitriou | // Bind an event, specified by a string name, `ev`, to a `callback` function.
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73 | 8d08f18a | Kostas Papadimitriou | // Passing `"all"` will bind the callback to all events fired.
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74 | 8d08f18a | Kostas Papadimitriou | bind : function(ev, callback, context) { |
75 | 8d08f18a | Kostas Papadimitriou | var calls = this._callbacks || (this._callbacks = {}); |
76 | 2f834e7d | Kostas Papadimitriou | var list = calls[ev] || (calls[ev] = {});
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77 | 2f834e7d | Kostas Papadimitriou | var tail = list.tail || (list.tail = list.next = {});
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78 | 2f834e7d | Kostas Papadimitriou | tail.callback = callback; |
79 | 2f834e7d | Kostas Papadimitriou | tail.context = context; |
80 | 2f834e7d | Kostas Papadimitriou | list.tail = tail.next = {}; |
81 | 8d08f18a | Kostas Papadimitriou | return this; |
82 | 8d08f18a | Kostas Papadimitriou | }, |
83 | 8d08f18a | Kostas Papadimitriou | |
84 | 8d08f18a | Kostas Papadimitriou | // Remove one or many callbacks. If `callback` is null, removes all
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85 | 8d08f18a | Kostas Papadimitriou | // callbacks for the event. If `ev` is null, removes all bound callbacks
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86 | 8d08f18a | Kostas Papadimitriou | // for all events.
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87 | 8d08f18a | Kostas Papadimitriou | unbind : function(ev, callback) { |
88 | 2f834e7d | Kostas Papadimitriou | var calls, node, prev;
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89 | 8d08f18a | Kostas Papadimitriou | if (!ev) {
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90 | 2f834e7d | Kostas Papadimitriou | this._callbacks = null; |
91 | 8d08f18a | Kostas Papadimitriou | } else if (calls = this._callbacks) { |
92 | 8d08f18a | Kostas Papadimitriou | if (!callback) {
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93 | 2f834e7d | Kostas Papadimitriou | calls[ev] = {}; |
94 | 2f834e7d | Kostas Papadimitriou | } else if (node = calls[ev]) { |
95 | 2f834e7d | Kostas Papadimitriou | while ((prev = node) && (node = node.next)) {
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96 | 2f834e7d | Kostas Papadimitriou | if (node.callback !== callback) continue; |
97 | 2f834e7d | Kostas Papadimitriou | prev.next = node.next; |
98 | 2f834e7d | Kostas Papadimitriou | node.context = node.callback = null;
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99 | 2f834e7d | Kostas Papadimitriou | break;
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100 | 8d08f18a | Kostas Papadimitriou | } |
101 | 8d08f18a | Kostas Papadimitriou | } |
102 | 8d08f18a | Kostas Papadimitriou | } |
103 | 8d08f18a | Kostas Papadimitriou | return this; |
104 | 8d08f18a | Kostas Papadimitriou | }, |
105 | 8d08f18a | Kostas Papadimitriou | |
106 | 8d08f18a | Kostas Papadimitriou | // Trigger an event, firing all bound callbacks. Callbacks are passed the
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107 | 8d08f18a | Kostas Papadimitriou | // same arguments as `trigger` is, apart from the event name.
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108 | 8d08f18a | Kostas Papadimitriou | // Listening for `"all"` passes the true event name as the first argument.
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109 | 8d08f18a | Kostas Papadimitriou | trigger : function(eventName) { |
110 | 2f834e7d | Kostas Papadimitriou | var node, calls, callback, args, ev, events = ['all', eventName]; |
111 | 8d08f18a | Kostas Papadimitriou | if (!(calls = this._callbacks)) return this; |
112 | 2f834e7d | Kostas Papadimitriou | while (ev = events.pop()) {
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113 | 2f834e7d | Kostas Papadimitriou | if (!(node = calls[ev])) continue; |
114 | 2f834e7d | Kostas Papadimitriou | args = ev == 'all' ? arguments : slice.call(arguments, 1); |
115 | 2f834e7d | Kostas Papadimitriou | while (node = node.next) if (callback = node.callback) callback.apply(node.context || this, args); |
116 | 8d08f18a | Kostas Papadimitriou | } |
117 | 8d08f18a | Kostas Papadimitriou | return this; |
118 | 8d08f18a | Kostas Papadimitriou | } |
119 | 8d08f18a | Kostas Papadimitriou | |
120 | 8d08f18a | Kostas Papadimitriou | }; |
121 | 8d08f18a | Kostas Papadimitriou | |
122 | 8d08f18a | Kostas Papadimitriou | // Backbone.Model
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123 | 8d08f18a | Kostas Papadimitriou | // --------------
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124 | 8d08f18a | Kostas Papadimitriou | |
125 | 8d08f18a | Kostas Papadimitriou | // Create a new model, with defined attributes. A client id (`cid`)
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126 | 8d08f18a | Kostas Papadimitriou | // is automatically generated and assigned for you.
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127 | 8d08f18a | Kostas Papadimitriou | Backbone.Model = function(attributes, options) { |
128 | 8d08f18a | Kostas Papadimitriou | var defaults;
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129 | 8d08f18a | Kostas Papadimitriou | attributes || (attributes = {}); |
130 | 8d08f18a | Kostas Papadimitriou | if (defaults = this.defaults) { |
131 | 8d08f18a | Kostas Papadimitriou | if (_.isFunction(defaults)) defaults = defaults.call(this); |
132 | 8d08f18a | Kostas Papadimitriou | attributes = _.extend({}, defaults, attributes); |
133 | 8d08f18a | Kostas Papadimitriou | } |
134 | 8d08f18a | Kostas Papadimitriou | this.attributes = {};
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135 | 8d08f18a | Kostas Papadimitriou | this._escapedAttributes = {};
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136 | 8d08f18a | Kostas Papadimitriou | this.cid = _.uniqueId('c'); |
137 | 8d08f18a | Kostas Papadimitriou | this.set(attributes, {silent : true}); |
138 | 8d08f18a | Kostas Papadimitriou | this._changed = false; |
139 | 8d08f18a | Kostas Papadimitriou | this._previousAttributes = _.clone(this.attributes); |
140 | 8d08f18a | Kostas Papadimitriou | if (options && options.collection) this.collection = options.collection; |
141 | 8d08f18a | Kostas Papadimitriou | this.initialize(attributes, options);
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142 | 8d08f18a | Kostas Papadimitriou | }; |
143 | 8d08f18a | Kostas Papadimitriou | |
144 | 8d08f18a | Kostas Papadimitriou | // Attach all inheritable methods to the Model prototype.
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145 | 8d08f18a | Kostas Papadimitriou | _.extend(Backbone.Model.prototype, Backbone.Events, { |
146 | 8d08f18a | Kostas Papadimitriou | |
147 | 8d08f18a | Kostas Papadimitriou | // Has the item been changed since the last `"change"` event?
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148 | 8d08f18a | Kostas Papadimitriou | _changed : false, |
149 | 8d08f18a | Kostas Papadimitriou | |
150 | 8d08f18a | Kostas Papadimitriou | // The default name for the JSON `id` attribute is `"id"`. MongoDB and
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151 | 8d08f18a | Kostas Papadimitriou | // CouchDB users may want to set this to `"_id"`.
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152 | 8d08f18a | Kostas Papadimitriou | idAttribute : 'id', |
153 | 8d08f18a | Kostas Papadimitriou | |
154 | 8d08f18a | Kostas Papadimitriou | // Initialize is an empty function by default. Override it with your own
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155 | 8d08f18a | Kostas Papadimitriou | // initialization logic.
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156 | 8d08f18a | Kostas Papadimitriou | initialize : function(){}, |
157 | 8d08f18a | Kostas Papadimitriou | |
158 | 8d08f18a | Kostas Papadimitriou | // Return a copy of the model's `attributes` object.
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159 | 8d08f18a | Kostas Papadimitriou | toJSON : function() { |
160 | 8d08f18a | Kostas Papadimitriou | return _.clone(this.attributes); |
161 | 8d08f18a | Kostas Papadimitriou | }, |
162 | 8d08f18a | Kostas Papadimitriou | |
163 | 8d08f18a | Kostas Papadimitriou | // Get the value of an attribute.
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164 | 8d08f18a | Kostas Papadimitriou | get : function(attr) { |
165 | 8d08f18a | Kostas Papadimitriou | return this.attributes[attr]; |
166 | 8d08f18a | Kostas Papadimitriou | }, |
167 | 8d08f18a | Kostas Papadimitriou | |
168 | 8d08f18a | Kostas Papadimitriou | // Get the HTML-escaped value of an attribute.
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169 | 8d08f18a | Kostas Papadimitriou | escape : function(attr) { |
170 | 8d08f18a | Kostas Papadimitriou | var html;
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171 | 8d08f18a | Kostas Papadimitriou | if (html = this._escapedAttributes[attr]) return html; |
172 | 8d08f18a | Kostas Papadimitriou | var val = this.attributes[attr]; |
173 | 2f834e7d | Kostas Papadimitriou | return this._escapedAttributes[attr] = _.escape(val == null ? '' : '' + val); |
174 | 8d08f18a | Kostas Papadimitriou | }, |
175 | 8d08f18a | Kostas Papadimitriou | |
176 | 8d08f18a | Kostas Papadimitriou | // Returns `true` if the attribute contains a value that is not null
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177 | 8d08f18a | Kostas Papadimitriou | // or undefined.
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178 | 8d08f18a | Kostas Papadimitriou | has : function(attr) { |
179 | 8d08f18a | Kostas Papadimitriou | return this.attributes[attr] != null; |
180 | 8d08f18a | Kostas Papadimitriou | }, |
181 | 8d08f18a | Kostas Papadimitriou | |
182 | 8d08f18a | Kostas Papadimitriou | // Set a hash of model attributes on the object, firing `"change"` unless you
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183 | 8d08f18a | Kostas Papadimitriou | // choose to silence it.
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184 | 8d08f18a | Kostas Papadimitriou | set : function(attrs, options) { |
185 | 8d08f18a | Kostas Papadimitriou | |
186 | 8d08f18a | Kostas Papadimitriou | // Extract attributes and options.
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187 | 8d08f18a | Kostas Papadimitriou | options || (options = {}); |
188 | 8d08f18a | Kostas Papadimitriou | if (!attrs) return this; |
189 | 8d08f18a | Kostas Papadimitriou | if (attrs.attributes) attrs = attrs.attributes;
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190 | 8d08f18a | Kostas Papadimitriou | var now = this.attributes, escaped = this._escapedAttributes; |
191 | 8d08f18a | Kostas Papadimitriou | |
192 | 8d08f18a | Kostas Papadimitriou | // Run validation.
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193 | 8d08f18a | Kostas Papadimitriou | if (!options.silent && this.validate && !this._performValidation(attrs, options)) return false; |
194 | 8d08f18a | Kostas Papadimitriou | |
195 | 8d08f18a | Kostas Papadimitriou | // Check for changes of `id`.
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196 | 8d08f18a | Kostas Papadimitriou | if (this.idAttribute in attrs) this.id = attrs[this.idAttribute]; |
197 | 8d08f18a | Kostas Papadimitriou | |
198 | 8d08f18a | Kostas Papadimitriou | // We're about to start triggering change events.
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199 | 8d08f18a | Kostas Papadimitriou | var alreadyChanging = this._changing; |
200 | 8d08f18a | Kostas Papadimitriou | this._changing = true; |
201 | 8d08f18a | Kostas Papadimitriou | |
202 | 8d08f18a | Kostas Papadimitriou | // Update attributes.
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203 | 8d08f18a | Kostas Papadimitriou | for (var attr in attrs) { |
204 | 8d08f18a | Kostas Papadimitriou | var val = attrs[attr];
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205 | 8d08f18a | Kostas Papadimitriou | if (!_.isEqual(now[attr], val)) {
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206 | 8d08f18a | Kostas Papadimitriou | now[attr] = val; |
207 | 8d08f18a | Kostas Papadimitriou | delete escaped[attr];
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208 | 8d08f18a | Kostas Papadimitriou | this._changed = true; |
209 | 8d08f18a | Kostas Papadimitriou | if (!options.silent) this.trigger('change:' + attr, this, val, options); |
210 | 8d08f18a | Kostas Papadimitriou | } |
211 | 8d08f18a | Kostas Papadimitriou | } |
212 | 8d08f18a | Kostas Papadimitriou | |
213 | 8d08f18a | Kostas Papadimitriou | // Fire the `"change"` event, if the model has been changed.
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214 | 8d08f18a | Kostas Papadimitriou | if (!alreadyChanging && !options.silent && this._changed) this.change(options); |
215 | 8d08f18a | Kostas Papadimitriou | this._changing = false; |
216 | 8d08f18a | Kostas Papadimitriou | return this; |
217 | 8d08f18a | Kostas Papadimitriou | }, |
218 | 8d08f18a | Kostas Papadimitriou | |
219 | 8d08f18a | Kostas Papadimitriou | // Remove an attribute from the model, firing `"change"` unless you choose
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220 | 8d08f18a | Kostas Papadimitriou | // to silence it. `unset` is a noop if the attribute doesn't exist.
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221 | 8d08f18a | Kostas Papadimitriou | unset : function(attr, options) { |
222 | 8d08f18a | Kostas Papadimitriou | if (!(attr in this.attributes)) return this; |
223 | 8d08f18a | Kostas Papadimitriou | options || (options = {}); |
224 | 8d08f18a | Kostas Papadimitriou | var value = this.attributes[attr]; |
225 | 8d08f18a | Kostas Papadimitriou | |
226 | 8d08f18a | Kostas Papadimitriou | // Run validation.
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227 | 8d08f18a | Kostas Papadimitriou | var validObj = {};
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228 | 8d08f18a | Kostas Papadimitriou | validObj[attr] = void 0; |
229 | 8d08f18a | Kostas Papadimitriou | if (!options.silent && this.validate && !this._performValidation(validObj, options)) return false; |
230 | 8d08f18a | Kostas Papadimitriou | |
231 | 2f834e7d | Kostas Papadimitriou | // changedAttributes needs to know if an attribute has been unset.
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232 | 2f834e7d | Kostas Papadimitriou | (this._unsetAttributes || (this._unsetAttributes = [])).push(attr); |
233 | 2f834e7d | Kostas Papadimitriou | |
234 | 8d08f18a | Kostas Papadimitriou | // Remove the attribute.
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235 | 8d08f18a | Kostas Papadimitriou | delete this.attributes[attr]; |
236 | 8d08f18a | Kostas Papadimitriou | delete this._escapedAttributes[attr]; |
237 | 8d08f18a | Kostas Papadimitriou | if (attr == this.idAttribute) delete this.id; |
238 | 8d08f18a | Kostas Papadimitriou | this._changed = true; |
239 | 8d08f18a | Kostas Papadimitriou | if (!options.silent) {
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240 | 8d08f18a | Kostas Papadimitriou | this.trigger('change:' + attr, this, void 0, options); |
241 | 8d08f18a | Kostas Papadimitriou | this.change(options);
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242 | 8d08f18a | Kostas Papadimitriou | } |
243 | 8d08f18a | Kostas Papadimitriou | return this; |
244 | 8d08f18a | Kostas Papadimitriou | }, |
245 | 8d08f18a | Kostas Papadimitriou | |
246 | 8d08f18a | Kostas Papadimitriou | // Clear all attributes on the model, firing `"change"` unless you choose
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247 | 8d08f18a | Kostas Papadimitriou | // to silence it.
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248 | 8d08f18a | Kostas Papadimitriou | clear : function(options) { |
249 | 8d08f18a | Kostas Papadimitriou | options || (options = {}); |
250 | 8d08f18a | Kostas Papadimitriou | var attr;
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251 | 8d08f18a | Kostas Papadimitriou | var old = this.attributes; |
252 | 8d08f18a | Kostas Papadimitriou | |
253 | 8d08f18a | Kostas Papadimitriou | // Run validation.
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254 | 8d08f18a | Kostas Papadimitriou | var validObj = {};
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255 | 8d08f18a | Kostas Papadimitriou | for (attr in old) validObj[attr] = void 0; |
256 | 8d08f18a | Kostas Papadimitriou | if (!options.silent && this.validate && !this._performValidation(validObj, options)) return false; |
257 | 8d08f18a | Kostas Papadimitriou | |
258 | 8d08f18a | Kostas Papadimitriou | this.attributes = {};
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259 | 8d08f18a | Kostas Papadimitriou | this._escapedAttributes = {};
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260 | 8d08f18a | Kostas Papadimitriou | this._changed = true; |
261 | 8d08f18a | Kostas Papadimitriou | if (!options.silent) {
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262 | 8d08f18a | Kostas Papadimitriou | for (attr in old) { |
263 | 8d08f18a | Kostas Papadimitriou | this.trigger('change:' + attr, this, void 0, options); |
264 | 8d08f18a | Kostas Papadimitriou | } |
265 | 8d08f18a | Kostas Papadimitriou | this.change(options);
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266 | 8d08f18a | Kostas Papadimitriou | } |
267 | 8d08f18a | Kostas Papadimitriou | return this; |
268 | 8d08f18a | Kostas Papadimitriou | }, |
269 | 8d08f18a | Kostas Papadimitriou | |
270 | 8d08f18a | Kostas Papadimitriou | // Fetch the model from the server. If the server's representation of the
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271 | 8d08f18a | Kostas Papadimitriou | // model differs from its current attributes, they will be overriden,
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272 | 8d08f18a | Kostas Papadimitriou | // triggering a `"change"` event.
|
273 | 8d08f18a | Kostas Papadimitriou | fetch : function(options) { |
274 | 8d08f18a | Kostas Papadimitriou | options || (options = {}); |
275 | 8d08f18a | Kostas Papadimitriou | var model = this; |
276 | 8d08f18a | Kostas Papadimitriou | var success = options.success;
|
277 | 8d08f18a | Kostas Papadimitriou | options.success = function(resp, status, xhr) { |
278 | 8d08f18a | Kostas Papadimitriou | if (!model.set(model.parse(resp, xhr), options)) return false; |
279 | 8d08f18a | Kostas Papadimitriou | if (success) success(model, resp);
|
280 | 8d08f18a | Kostas Papadimitriou | }; |
281 | 8d08f18a | Kostas Papadimitriou | options.error = wrapError(options.error, model, options); |
282 | 8d08f18a | Kostas Papadimitriou | return (this.sync || Backbone.sync).call(this, 'read', this, options); |
283 | 8d08f18a | Kostas Papadimitriou | }, |
284 | 8d08f18a | Kostas Papadimitriou | |
285 | 8d08f18a | Kostas Papadimitriou | // Set a hash of model attributes, and sync the model to the server.
|
286 | 8d08f18a | Kostas Papadimitriou | // If the server returns an attributes hash that differs, the model's
|
287 | 8d08f18a | Kostas Papadimitriou | // state will be `set` again.
|
288 | 8d08f18a | Kostas Papadimitriou | save : function(attrs, options) { |
289 | 8d08f18a | Kostas Papadimitriou | options || (options = {}); |
290 | 8d08f18a | Kostas Papadimitriou | if (attrs && !this.set(attrs, options)) return false; |
291 | 8d08f18a | Kostas Papadimitriou | var model = this; |
292 | 8d08f18a | Kostas Papadimitriou | var success = options.success;
|
293 | 8d08f18a | Kostas Papadimitriou | options.success = function(resp, status, xhr) { |
294 | 8d08f18a | Kostas Papadimitriou | if (!model.set(model.parse(resp, xhr), options)) return false; |
295 | 8d08f18a | Kostas Papadimitriou | if (success) success(model, resp, xhr);
|
296 | 8d08f18a | Kostas Papadimitriou | }; |
297 | 8d08f18a | Kostas Papadimitriou | options.error = wrapError(options.error, model, options); |
298 | 8d08f18a | Kostas Papadimitriou | var method = this.isNew() ? 'create' : 'update'; |
299 | 8d08f18a | Kostas Papadimitriou | return (this.sync || Backbone.sync).call(this, method, this, options); |
300 | 8d08f18a | Kostas Papadimitriou | }, |
301 | 8d08f18a | Kostas Papadimitriou | |
302 | 8d08f18a | Kostas Papadimitriou | // Destroy this model on the server if it was already persisted. Upon success, the model is removed
|
303 | 8d08f18a | Kostas Papadimitriou | // from its collection, if it has one.
|
304 | 8d08f18a | Kostas Papadimitriou | destroy : function(options) { |
305 | 8d08f18a | Kostas Papadimitriou | options || (options = {}); |
306 | 8d08f18a | Kostas Papadimitriou | if (this.isNew()) return this.trigger('destroy', this, this.collection, options); |
307 | 8d08f18a | Kostas Papadimitriou | var model = this; |
308 | 8d08f18a | Kostas Papadimitriou | var success = options.success;
|
309 | 8d08f18a | Kostas Papadimitriou | options.success = function(resp) { |
310 | 7977bbc9 | Kostas Papadimitriou | if (!options.silent) {
|
311 | 7977bbc9 | Kostas Papadimitriou | model.trigger('destroy', model, model.collection, options);
|
312 | 7977bbc9 | Kostas Papadimitriou | } |
313 | 8d08f18a | Kostas Papadimitriou | if (success) success(model, resp);
|
314 | 8d08f18a | Kostas Papadimitriou | }; |
315 | 8d08f18a | Kostas Papadimitriou | options.error = wrapError(options.error, model, options); |
316 | 8d08f18a | Kostas Papadimitriou | return (this.sync || Backbone.sync).call(this, 'delete', this, options); |
317 | 8d08f18a | Kostas Papadimitriou | }, |
318 | 8d08f18a | Kostas Papadimitriou | |
319 | 8d08f18a | Kostas Papadimitriou | // Default URL for the model's representation on the server -- if you're
|
320 | 8d08f18a | Kostas Papadimitriou | // using Backbone's restful methods, override this to change the endpoint
|
321 | 8d08f18a | Kostas Papadimitriou | // that will be called.
|
322 | 8d08f18a | Kostas Papadimitriou | url : function(options) { |
323 | 8d08f18a | Kostas Papadimitriou | var base = getUrl(this.collection, options) || this.urlRoot || urlError(); |
324 | 8d08f18a | Kostas Papadimitriou | if (this.isNew()) return base; |
325 | 8d08f18a | Kostas Papadimitriou | return base + (base.charAt(base.length - 1) == '/' ? '' : '/') + encodeURIComponent(this.id); |
326 | 8d08f18a | Kostas Papadimitriou | }, |
327 | 8d08f18a | Kostas Papadimitriou | |
328 | 8d08f18a | Kostas Papadimitriou | // **parse** converts a response into the hash of attributes to be `set` on
|
329 | 8d08f18a | Kostas Papadimitriou | // the model. The default implementation is just to pass the response along.
|
330 | 8d08f18a | Kostas Papadimitriou | parse : function(resp, xhr) { |
331 | 8d08f18a | Kostas Papadimitriou | return resp;
|
332 | 8d08f18a | Kostas Papadimitriou | }, |
333 | 8d08f18a | Kostas Papadimitriou | |
334 | 8d08f18a | Kostas Papadimitriou | // Create a new model with identical attributes to this one.
|
335 | 8d08f18a | Kostas Papadimitriou | clone : function() { |
336 | 8d08f18a | Kostas Papadimitriou | return new this.constructor(this); |
337 | 8d08f18a | Kostas Papadimitriou | }, |
338 | 8d08f18a | Kostas Papadimitriou | |
339 | 8d08f18a | Kostas Papadimitriou | // A model is new if it has never been saved to the server, and lacks an id.
|
340 | 8d08f18a | Kostas Papadimitriou | isNew : function() { |
341 | 8d08f18a | Kostas Papadimitriou | return this.id == null; |
342 | 8d08f18a | Kostas Papadimitriou | }, |
343 | 8d08f18a | Kostas Papadimitriou | |
344 | 8d08f18a | Kostas Papadimitriou | // Call this method to manually fire a `change` event for this model.
|
345 | 8d08f18a | Kostas Papadimitriou | // Calling this will cause all objects observing the model to update.
|
346 | 8d08f18a | Kostas Papadimitriou | change : function(options) { |
347 | 8d08f18a | Kostas Papadimitriou | this.trigger('change', this, options); |
348 | 8d08f18a | Kostas Papadimitriou | this._previousAttributes = _.clone(this.attributes); |
349 | 2f834e7d | Kostas Papadimitriou | this._unsetAttributes = null; |
350 | 8d08f18a | Kostas Papadimitriou | this._changed = false; |
351 | 8d08f18a | Kostas Papadimitriou | }, |
352 | 8d08f18a | Kostas Papadimitriou | |
353 | 8d08f18a | Kostas Papadimitriou | // Determine if the model has changed since the last `"change"` event.
|
354 | 8d08f18a | Kostas Papadimitriou | // If you specify an attribute name, determine if that attribute has changed.
|
355 | 8d08f18a | Kostas Papadimitriou | hasChanged : function(attr) { |
356 | 8d08f18a | Kostas Papadimitriou | if (attr) return this._previousAttributes[attr] != this.attributes[attr]; |
357 | 8d08f18a | Kostas Papadimitriou | return this._changed; |
358 | 8d08f18a | Kostas Papadimitriou | }, |
359 | 8d08f18a | Kostas Papadimitriou | |
360 | 8d08f18a | Kostas Papadimitriou | // Return an object containing all the attributes that have changed, or false
|
361 | 8d08f18a | Kostas Papadimitriou | // if there are no changed attributes. Useful for determining what parts of a
|
362 | 8d08f18a | Kostas Papadimitriou | // view need to be updated and/or what attributes need to be persisted to
|
363 | 2f834e7d | Kostas Papadimitriou | // the server. Unset attributes will be set to undefined.
|
364 | 8d08f18a | Kostas Papadimitriou | changedAttributes : function(now) { |
365 | 8d08f18a | Kostas Papadimitriou | now || (now = this.attributes);
|
366 | 2f834e7d | Kostas Papadimitriou | var old = this._previousAttributes, unset = this._unsetAttributes; |
367 | 2f834e7d | Kostas Papadimitriou | |
368 | 8d08f18a | Kostas Papadimitriou | var changed = false; |
369 | 8d08f18a | Kostas Papadimitriou | for (var attr in now) { |
370 | 8d08f18a | Kostas Papadimitriou | if (!_.isEqual(old[attr], now[attr])) {
|
371 | 2f834e7d | Kostas Papadimitriou | changed || (changed = {}); |
372 | 8d08f18a | Kostas Papadimitriou | changed[attr] = now[attr]; |
373 | 8d08f18a | Kostas Papadimitriou | } |
374 | 8d08f18a | Kostas Papadimitriou | } |
375 | 2f834e7d | Kostas Papadimitriou | |
376 | 2f834e7d | Kostas Papadimitriou | if (unset) {
|
377 | 2f834e7d | Kostas Papadimitriou | changed || (changed = {}); |
378 | 2f834e7d | Kostas Papadimitriou | var len = unset.length;
|
379 | 2f834e7d | Kostas Papadimitriou | while (len--) changed[unset[len]] = void 0; |
380 | 2f834e7d | Kostas Papadimitriou | } |
381 | 2f834e7d | Kostas Papadimitriou | |
382 | 8d08f18a | Kostas Papadimitriou | return changed;
|
383 | 8d08f18a | Kostas Papadimitriou | }, |
384 | 8d08f18a | Kostas Papadimitriou | |
385 | 8d08f18a | Kostas Papadimitriou | // Get the previous value of an attribute, recorded at the time the last
|
386 | 8d08f18a | Kostas Papadimitriou | // `"change"` event was fired.
|
387 | 8d08f18a | Kostas Papadimitriou | previous : function(attr) { |
388 | 8d08f18a | Kostas Papadimitriou | if (!attr || !this._previousAttributes) return null; |
389 | 8d08f18a | Kostas Papadimitriou | return this._previousAttributes[attr]; |
390 | 8d08f18a | Kostas Papadimitriou | }, |
391 | 8d08f18a | Kostas Papadimitriou | |
392 | 8d08f18a | Kostas Papadimitriou | // Get all of the attributes of the model at the time of the previous
|
393 | 8d08f18a | Kostas Papadimitriou | // `"change"` event.
|
394 | 8d08f18a | Kostas Papadimitriou | previousAttributes : function() { |
395 | 8d08f18a | Kostas Papadimitriou | return _.clone(this._previousAttributes); |
396 | 8d08f18a | Kostas Papadimitriou | }, |
397 | 8d08f18a | Kostas Papadimitriou | |
398 | 8d08f18a | Kostas Papadimitriou | // Run validation against a set of incoming attributes, returning `true`
|
399 | 8d08f18a | Kostas Papadimitriou | // if all is well. If a specific `error` callback has been passed,
|
400 | 8d08f18a | Kostas Papadimitriou | // call that instead of firing the general `"error"` event.
|
401 | 8d08f18a | Kostas Papadimitriou | _performValidation : function(attrs, options) { |
402 | 8d08f18a | Kostas Papadimitriou | var error = this.validate(attrs); |
403 | 8d08f18a | Kostas Papadimitriou | if (error) {
|
404 | 8d08f18a | Kostas Papadimitriou | if (options.error) {
|
405 | 8d08f18a | Kostas Papadimitriou | options.error(this, error, options);
|
406 | 8d08f18a | Kostas Papadimitriou | } else {
|
407 | 8d08f18a | Kostas Papadimitriou | this.trigger('error', this, error, options); |
408 | 8d08f18a | Kostas Papadimitriou | } |
409 | 8d08f18a | Kostas Papadimitriou | return false; |
410 | 8d08f18a | Kostas Papadimitriou | } |
411 | 8d08f18a | Kostas Papadimitriou | return true; |
412 | 8d08f18a | Kostas Papadimitriou | } |
413 | 8d08f18a | Kostas Papadimitriou | |
414 | 8d08f18a | Kostas Papadimitriou | }); |
415 | 8d08f18a | Kostas Papadimitriou | |
416 | 8d08f18a | Kostas Papadimitriou | // Backbone.Collection
|
417 | 8d08f18a | Kostas Papadimitriou | // -------------------
|
418 | 8d08f18a | Kostas Papadimitriou | |
419 | 8d08f18a | Kostas Papadimitriou | // Provides a standard collection class for our sets of models, ordered
|
420 | 8d08f18a | Kostas Papadimitriou | // or unordered. If a `comparator` is specified, the Collection will maintain
|
421 | 8d08f18a | Kostas Papadimitriou | // its models in sort order, as they're added and removed.
|
422 | 8d08f18a | Kostas Papadimitriou | Backbone.Collection = function(models, options) { |
423 | 8d08f18a | Kostas Papadimitriou | options || (options = {}); |
424 | 8d08f18a | Kostas Papadimitriou | if (options.comparator) this.comparator = options.comparator; |
425 | 8d08f18a | Kostas Papadimitriou | _.bindAll(this, '_onModelEvent', '_removeReference'); |
426 | 8d08f18a | Kostas Papadimitriou | this._reset();
|
427 | 8d08f18a | Kostas Papadimitriou | if (models) this.reset(models, {silent: true}); |
428 | 8d08f18a | Kostas Papadimitriou | this.initialize.apply(this, arguments); |
429 | 8d08f18a | Kostas Papadimitriou | }; |
430 | 8d08f18a | Kostas Papadimitriou | |
431 | 8d08f18a | Kostas Papadimitriou | // Define the Collection's inheritable methods.
|
432 | 8d08f18a | Kostas Papadimitriou | _.extend(Backbone.Collection.prototype, Backbone.Events, { |
433 | 8d08f18a | Kostas Papadimitriou | |
434 | 8d08f18a | Kostas Papadimitriou | // The default model for a collection is just a **Backbone.Model**.
|
435 | 8d08f18a | Kostas Papadimitriou | // This should be overridden in most cases.
|
436 | 8d08f18a | Kostas Papadimitriou | model : Backbone.Model,
|
437 | 8d08f18a | Kostas Papadimitriou | |
438 | 8d08f18a | Kostas Papadimitriou | // Initialize is an empty function by default. Override it with your own
|
439 | 8d08f18a | Kostas Papadimitriou | // initialization logic.
|
440 | 8d08f18a | Kostas Papadimitriou | initialize : function(){}, |
441 | 8d08f18a | Kostas Papadimitriou | |
442 | 8d08f18a | Kostas Papadimitriou | // The JSON representation of a Collection is an array of the
|
443 | 8d08f18a | Kostas Papadimitriou | // models' attributes.
|
444 | 8d08f18a | Kostas Papadimitriou | toJSON : function() { |
445 | 8d08f18a | Kostas Papadimitriou | return this.map(function(model){ return model.toJSON(); }); |
446 | 8d08f18a | Kostas Papadimitriou | }, |
447 | 8d08f18a | Kostas Papadimitriou | |
448 | 8d08f18a | Kostas Papadimitriou | // Add a model, or list of models to the set. Pass **silent** to avoid
|
449 | 8d08f18a | Kostas Papadimitriou | // firing the `added` event for every new model.
|
450 | 8d08f18a | Kostas Papadimitriou | add : function(models, options) { |
451 | 8d08f18a | Kostas Papadimitriou | if (_.isArray(models)) {
|
452 | 8d08f18a | Kostas Papadimitriou | for (var i = 0, l = models.length; i < l; i++) { |
453 | 8d08f18a | Kostas Papadimitriou | this._add(models[i], options);
|
454 | 8d08f18a | Kostas Papadimitriou | } |
455 | 8d08f18a | Kostas Papadimitriou | } else {
|
456 | 8d08f18a | Kostas Papadimitriou | this._add(models, options);
|
457 | 8d08f18a | Kostas Papadimitriou | } |
458 | 8d08f18a | Kostas Papadimitriou | return this; |
459 | 8d08f18a | Kostas Papadimitriou | }, |
460 | 8d08f18a | Kostas Papadimitriou | |
461 | 8d08f18a | Kostas Papadimitriou | // Remove a model, or a list of models from the set. Pass silent to avoid
|
462 | 8d08f18a | Kostas Papadimitriou | // firing the `removed` event for every model removed.
|
463 | 8d08f18a | Kostas Papadimitriou | remove : function(models, options) { |
464 | 8d08f18a | Kostas Papadimitriou | if (_.isArray(models)) {
|
465 | 8d08f18a | Kostas Papadimitriou | for (var i = 0, l = models.length; i < l; i++) { |
466 | 8d08f18a | Kostas Papadimitriou | this._remove(models[i], options);
|
467 | 8d08f18a | Kostas Papadimitriou | } |
468 | 8d08f18a | Kostas Papadimitriou | } else {
|
469 | 8d08f18a | Kostas Papadimitriou | this._remove(models, options);
|
470 | 8d08f18a | Kostas Papadimitriou | } |
471 | 8d08f18a | Kostas Papadimitriou | return this; |
472 | 8d08f18a | Kostas Papadimitriou | }, |
473 | 8d08f18a | Kostas Papadimitriou | |
474 | 8d08f18a | Kostas Papadimitriou | // Get a model from the set by id.
|
475 | 8d08f18a | Kostas Papadimitriou | get : function(id) { |
476 | 8d08f18a | Kostas Papadimitriou | if (id == null) return null; |
477 | 8d08f18a | Kostas Papadimitriou | return this._byId[id.id != null ? id.id : id]; |
478 | 8d08f18a | Kostas Papadimitriou | }, |
479 | 8d08f18a | Kostas Papadimitriou | |
480 | 8d08f18a | Kostas Papadimitriou | // Get a model from the set by client id.
|
481 | 8d08f18a | Kostas Papadimitriou | getByCid : function(cid) { |
482 | 8d08f18a | Kostas Papadimitriou | return cid && this._byCid[cid.cid || cid]; |
483 | 8d08f18a | Kostas Papadimitriou | }, |
484 | 8d08f18a | Kostas Papadimitriou | |
485 | 8d08f18a | Kostas Papadimitriou | // Get the model at the given index.
|
486 | 2f834e7d | Kostas Papadimitriou | at : function(index) { |
487 | 8d08f18a | Kostas Papadimitriou | return this.models[index]; |
488 | 8d08f18a | Kostas Papadimitriou | }, |
489 | 8d08f18a | Kostas Papadimitriou | |
490 | 8d08f18a | Kostas Papadimitriou | // Force the collection to re-sort itself. You don't need to call this under normal
|
491 | 8d08f18a | Kostas Papadimitriou | // circumstances, as the set will maintain sort order as each item is added.
|
492 | 8d08f18a | Kostas Papadimitriou | sort : function(options) { |
493 | 8d08f18a | Kostas Papadimitriou | options || (options = {}); |
494 | 8d08f18a | Kostas Papadimitriou | if (!this.comparator) throw new Error('Cannot sort a set without a comparator'); |
495 | 8d08f18a | Kostas Papadimitriou | this.models = this.sortBy(this.comparator); |
496 | 8d08f18a | Kostas Papadimitriou | if (!options.silent) this.trigger('reset', this, options); |
497 | 8d08f18a | Kostas Papadimitriou | return this; |
498 | 8d08f18a | Kostas Papadimitriou | }, |
499 | 8d08f18a | Kostas Papadimitriou | |
500 | 8d08f18a | Kostas Papadimitriou | // Pluck an attribute from each model in the collection.
|
501 | 8d08f18a | Kostas Papadimitriou | pluck : function(attr) { |
502 | 8d08f18a | Kostas Papadimitriou | return _.map(this.models, function(model){ return model.get(attr); }); |
503 | 8d08f18a | Kostas Papadimitriou | }, |
504 | 8d08f18a | Kostas Papadimitriou | |
505 | 8d08f18a | Kostas Papadimitriou | // When you have more items than you want to add or remove individually,
|
506 | 8d08f18a | Kostas Papadimitriou | // you can reset the entire set with a new list of models, without firing
|
507 | 8d08f18a | Kostas Papadimitriou | // any `added` or `removed` events. Fires `reset` when finished.
|
508 | 8d08f18a | Kostas Papadimitriou | reset : function(models, options) { |
509 | 8d08f18a | Kostas Papadimitriou | models || (models = []); |
510 | 8d08f18a | Kostas Papadimitriou | options || (options = {}); |
511 | 8d08f18a | Kostas Papadimitriou | this.each(this._removeReference); |
512 | 8d08f18a | Kostas Papadimitriou | this._reset();
|
513 | 8d08f18a | Kostas Papadimitriou | this.add(models, {silent: true}); |
514 | 8d08f18a | Kostas Papadimitriou | if (!options.silent) this.trigger('reset', this, options); |
515 | 8d08f18a | Kostas Papadimitriou | return this; |
516 | 8d08f18a | Kostas Papadimitriou | }, |
517 | 8d08f18a | Kostas Papadimitriou | |
518 | 8d08f18a | Kostas Papadimitriou | // When you have an existing set of models in a collection,
|
519 | 8d08f18a | Kostas Papadimitriou | // you can do in-place updates of these models, reusing existing instances.
|
520 | 8d08f18a | Kostas Papadimitriou | // - Items are matched against existing items in the collection by id
|
521 | 8d08f18a | Kostas Papadimitriou | // - New items are added
|
522 | 8d08f18a | Kostas Papadimitriou | // - matching models are updated using set(), triggers 'change'.
|
523 | 8d08f18a | Kostas Papadimitriou | // - existing models not present in the update are removed if 'removeMissing' is passed.
|
524 | 8d08f18a | Kostas Papadimitriou | // - a collection change event will be dispatched for each add() and remove()
|
525 | 8d08f18a | Kostas Papadimitriou | update : function(models, options) { |
526 | 8d08f18a | Kostas Papadimitriou | models || (models = []); |
527 | 8d08f18a | Kostas Papadimitriou | options || (options = {}); |
528 | 8d08f18a | Kostas Papadimitriou | |
529 | 8d08f18a | Kostas Papadimitriou | //keep track of the models we've updated, cause we're gunna delete the rest if 'removeMissing' is set.
|
530 | 8d08f18a | Kostas Papadimitriou | var updateMap = _.reduce(this.models, function(map, model){ map[model.id] = false; return map },{}); |
531 | 8d08f18a | Kostas Papadimitriou | |
532 | 8d08f18a | Kostas Papadimitriou | _.each( models, function(model) {
|
533 | 8d08f18a | Kostas Papadimitriou | |
534 | 8d08f18a | Kostas Papadimitriou | var idAttribute = this.model.prototype.idAttribute; |
535 | 8d08f18a | Kostas Papadimitriou | var modelId = model[idAttribute];
|
536 | 8d08f18a | Kostas Papadimitriou | |
537 | 8d08f18a | Kostas Papadimitriou | if ( modelId == undefined ) throw new Error("Can't update a model with no id attribute. Please use 'reset'."); |
538 | 8d08f18a | Kostas Papadimitriou | |
539 | 8d08f18a | Kostas Papadimitriou | if ( this._byId[modelId] ) { |
540 | 8d08f18a | Kostas Papadimitriou | var attrs = (model instanceof Backbone.Model) ? _.clone(model.attributes) : _.clone(model); |
541 | 8d08f18a | Kostas Papadimitriou | delete attrs[idAttribute];
|
542 | 8d08f18a | Kostas Papadimitriou | this._byId[modelId].set( attrs );
|
543 | 8d08f18a | Kostas Papadimitriou | updateMap[modelId] = true;
|
544 | 8d08f18a | Kostas Papadimitriou | } |
545 | 8d08f18a | Kostas Papadimitriou | else {
|
546 | 8d08f18a | Kostas Papadimitriou | this.add( model );
|
547 | 8d08f18a | Kostas Papadimitriou | } |
548 | 8d08f18a | Kostas Papadimitriou | }, this);
|
549 | 8d08f18a | Kostas Papadimitriou | |
550 | 8d08f18a | Kostas Papadimitriou | if ( options.removeMissing ) {
|
551 | 8d08f18a | Kostas Papadimitriou | _.select(updateMap, function(updated, modelId){
|
552 | 8d08f18a | Kostas Papadimitriou | if (!updated) this.remove( modelId ); |
553 | 8d08f18a | Kostas Papadimitriou | }, this);
|
554 | 8d08f18a | Kostas Papadimitriou | } |
555 | 8d08f18a | Kostas Papadimitriou | |
556 | 8d08f18a | Kostas Papadimitriou | return this; |
557 | 8d08f18a | Kostas Papadimitriou | }, |
558 | 8d08f18a | Kostas Papadimitriou | |
559 | 8d08f18a | Kostas Papadimitriou | // Fetch the default set of models for this collection, resetting the
|
560 | 8d08f18a | Kostas Papadimitriou | // collection when they arrive. If `add: true` is passed, appends the
|
561 | 8d08f18a | Kostas Papadimitriou | // models to the collection instead of resetting.
|
562 | 8d08f18a | Kostas Papadimitriou | fetch : function(options) { |
563 | 8d08f18a | Kostas Papadimitriou | options || (options = {}); |
564 | 8d08f18a | Kostas Papadimitriou | var collection = this; |
565 | 8d08f18a | Kostas Papadimitriou | var success = options.success;
|
566 | 8d08f18a | Kostas Papadimitriou | options.success = function(resp, status, xhr) { |
567 | 8d08f18a | Kostas Papadimitriou | collection[options.update ? 'update' : options.add ? 'add' : 'reset'](collection.parse(resp, xhr), options); |
568 | 8d08f18a | Kostas Papadimitriou | if (success) success(collection, resp);
|
569 | 8d08f18a | Kostas Papadimitriou | }; |
570 | 8d08f18a | Kostas Papadimitriou | options.error = wrapError(options.error, collection, options); |
571 | 8d08f18a | Kostas Papadimitriou | return (this.sync || Backbone.sync).call(this, 'read', this, options); |
572 | 8d08f18a | Kostas Papadimitriou | }, |
573 | 8d08f18a | Kostas Papadimitriou | |
574 | 8d08f18a | Kostas Papadimitriou | // Create a new instance of a model in this collection. After the model
|
575 | 8d08f18a | Kostas Papadimitriou | // has been created on the server, it will be added to the collection.
|
576 | 8d08f18a | Kostas Papadimitriou | // Returns the model, or 'false' if validation on a new model fails.
|
577 | 8d08f18a | Kostas Papadimitriou | create : function(model, options) { |
578 | 8d08f18a | Kostas Papadimitriou | var coll = this; |
579 | 8d08f18a | Kostas Papadimitriou | options || (options = {}); |
580 | 8d08f18a | Kostas Papadimitriou | model = this._prepareModel(model, options);
|
581 | 8d08f18a | Kostas Papadimitriou | if (!model) return false; |
582 | 8d08f18a | Kostas Papadimitriou | var success = options.success;
|
583 | 8d08f18a | Kostas Papadimitriou | options.success = function(nextModel, resp, xhr) { |
584 | 8d08f18a | Kostas Papadimitriou | coll.add(nextModel, options); |
585 | 8d08f18a | Kostas Papadimitriou | if (success) success(nextModel, resp, xhr);
|
586 | 8d08f18a | Kostas Papadimitriou | }; |
587 | 8d08f18a | Kostas Papadimitriou | model.save(null, options);
|
588 | 8d08f18a | Kostas Papadimitriou | return model;
|
589 | 8d08f18a | Kostas Papadimitriou | }, |
590 | 8d08f18a | Kostas Papadimitriou | |
591 | 8d08f18a | Kostas Papadimitriou | // **parse** converts a response into a list of models to be added to the
|
592 | 8d08f18a | Kostas Papadimitriou | // collection. The default implementation is just to pass it through.
|
593 | 8d08f18a | Kostas Papadimitriou | parse : function(resp, xhr) { |
594 | 8d08f18a | Kostas Papadimitriou | return resp;
|
595 | 8d08f18a | Kostas Papadimitriou | }, |
596 | 8d08f18a | Kostas Papadimitriou | |
597 | 8d08f18a | Kostas Papadimitriou | // Proxy to _'s chain. Can't be proxied the same way the rest of the
|
598 | 8d08f18a | Kostas Papadimitriou | // underscore methods are proxied because it relies on the underscore
|
599 | 8d08f18a | Kostas Papadimitriou | // constructor.
|
600 | 2f834e7d | Kostas Papadimitriou | chain : function () { |
601 | 8d08f18a | Kostas Papadimitriou | return _(this.models).chain(); |
602 | 8d08f18a | Kostas Papadimitriou | }, |
603 | 8d08f18a | Kostas Papadimitriou | |
604 | 8d08f18a | Kostas Papadimitriou | // Reset all internal state. Called when the collection is reset.
|
605 | 8d08f18a | Kostas Papadimitriou | _reset : function(options) { |
606 | 8d08f18a | Kostas Papadimitriou | this.length = 0; |
607 | 8d08f18a | Kostas Papadimitriou | this.models = [];
|
608 | 8d08f18a | Kostas Papadimitriou | this._byId = {};
|
609 | 8d08f18a | Kostas Papadimitriou | this._byCid = {};
|
610 | 8d08f18a | Kostas Papadimitriou | }, |
611 | 8d08f18a | Kostas Papadimitriou | |
612 | 8d08f18a | Kostas Papadimitriou | // Prepare a model to be added to this collection
|
613 | 2f834e7d | Kostas Papadimitriou | _prepareModel : function(model, options) { |
614 | 8d08f18a | Kostas Papadimitriou | if (!(model instanceof Backbone.Model)) { |
615 | 8d08f18a | Kostas Papadimitriou | var attrs = model;
|
616 | 8d08f18a | Kostas Papadimitriou | model = new this.model(attrs, {collection: this}); |
617 | 2f834e7d | Kostas Papadimitriou | if (model.validate && !model._performValidation(model.attributes, options)) model = false; |
618 | 8d08f18a | Kostas Papadimitriou | } else if (!model.collection) { |
619 | 8d08f18a | Kostas Papadimitriou | model.collection = this;
|
620 | 8d08f18a | Kostas Papadimitriou | } |
621 | 8d08f18a | Kostas Papadimitriou | return model;
|
622 | 8d08f18a | Kostas Papadimitriou | }, |
623 | 8d08f18a | Kostas Papadimitriou | |
624 | 8d08f18a | Kostas Papadimitriou | // Internal implementation of adding a single model to the set, updating
|
625 | 8d08f18a | Kostas Papadimitriou | // hash indexes for `id` and `cid` lookups.
|
626 | 8d08f18a | Kostas Papadimitriou | // Returns the model, or 'false' if validation on a new model fails.
|
627 | 8d08f18a | Kostas Papadimitriou | _add : function(model, options) { |
628 | 8d08f18a | Kostas Papadimitriou | options || (options = {}); |
629 | 8d08f18a | Kostas Papadimitriou | model = this._prepareModel(model, options);
|
630 | 8d08f18a | Kostas Papadimitriou | if (!model) return false; |
631 | 8d08f18a | Kostas Papadimitriou | var already = this.getByCid(model); |
632 | 8d08f18a | Kostas Papadimitriou | if (already) throw new Error(["Can't add the same model to a set twice", already.id]); |
633 | 8d08f18a | Kostas Papadimitriou | this._byId[model.id] = model;
|
634 | 8d08f18a | Kostas Papadimitriou | this._byCid[model.cid] = model;
|
635 | 8d08f18a | Kostas Papadimitriou | var index = options.at != null ? options.at : |
636 | 8d08f18a | Kostas Papadimitriou | this.comparator ? this.sortedIndex(model, this.comparator) : |
637 | 8d08f18a | Kostas Papadimitriou | this.length;
|
638 | 8d08f18a | Kostas Papadimitriou | this.models.splice(index, 0, model); |
639 | 8d08f18a | Kostas Papadimitriou | model.bind('all', this._onModelEvent); |
640 | 8d08f18a | Kostas Papadimitriou | this.length++;
|
641 | 2f834e7d | Kostas Papadimitriou | options.index = index; |
642 | 8d08f18a | Kostas Papadimitriou | if (!options.silent) model.trigger('add', model, this, options); |
643 | 8d08f18a | Kostas Papadimitriou | return model;
|
644 | 8d08f18a | Kostas Papadimitriou | }, |
645 | 8d08f18a | Kostas Papadimitriou | |
646 | 8d08f18a | Kostas Papadimitriou | // Internal implementation of removing a single model from the set, updating
|
647 | 8d08f18a | Kostas Papadimitriou | // hash indexes for `id` and `cid` lookups.
|
648 | 8d08f18a | Kostas Papadimitriou | _remove : function(model, options) { |
649 | 8d08f18a | Kostas Papadimitriou | options || (options = {}); |
650 | 8d08f18a | Kostas Papadimitriou | model = this.getByCid(model) || this.get(model); |
651 | 8d08f18a | Kostas Papadimitriou | if (!model) return null; |
652 | 8d08f18a | Kostas Papadimitriou | delete this._byId[model.id]; |
653 | 8d08f18a | Kostas Papadimitriou | delete this._byCid[model.cid]; |
654 | 2f834e7d | Kostas Papadimitriou | var index = this.indexOf(model); |
655 | 2f834e7d | Kostas Papadimitriou | this.models.splice(index, 1); |
656 | 8d08f18a | Kostas Papadimitriou | this.length--;
|
657 | 2f834e7d | Kostas Papadimitriou | options.index = index; |
658 | 8d08f18a | Kostas Papadimitriou | if (!options.silent) model.trigger('remove', model, this, options); |
659 | 8d08f18a | Kostas Papadimitriou | this._removeReference(model);
|
660 | 8d08f18a | Kostas Papadimitriou | return model;
|
661 | 8d08f18a | Kostas Papadimitriou | }, |
662 | 8d08f18a | Kostas Papadimitriou | |
663 | 8d08f18a | Kostas Papadimitriou | // Internal method to remove a model's ties to a collection.
|
664 | 8d08f18a | Kostas Papadimitriou | _removeReference : function(model) { |
665 | 8d08f18a | Kostas Papadimitriou | if (this == model.collection) { |
666 | 8d08f18a | Kostas Papadimitriou | delete model.collection;
|
667 | 8d08f18a | Kostas Papadimitriou | } |
668 | 8d08f18a | Kostas Papadimitriou | model.unbind('all', this._onModelEvent); |
669 | 8d08f18a | Kostas Papadimitriou | }, |
670 | 8d08f18a | Kostas Papadimitriou | |
671 | 8d08f18a | Kostas Papadimitriou | // Internal method called every time a model in the set fires an event.
|
672 | 8d08f18a | Kostas Papadimitriou | // Sets need to update their indexes when models change ids. All other
|
673 | 8d08f18a | Kostas Papadimitriou | // events simply proxy through. "add" and "remove" events that originate
|
674 | 8d08f18a | Kostas Papadimitriou | // in other collections are ignored.
|
675 | 8d08f18a | Kostas Papadimitriou | _onModelEvent : function(ev, model, collection, options) { |
676 | 8d08f18a | Kostas Papadimitriou | if ((ev == 'add' || ev == 'remove') && collection != this) return; |
677 | 8d08f18a | Kostas Papadimitriou | if (ev == 'destroy') { |
678 | 8d08f18a | Kostas Papadimitriou | this._remove(model, options);
|
679 | 8d08f18a | Kostas Papadimitriou | } |
680 | 8d08f18a | Kostas Papadimitriou | if (model && ev === 'change:' + model.idAttribute) { |
681 | 8d08f18a | Kostas Papadimitriou | delete this._byId[model.previous(model.idAttribute)]; |
682 | 8d08f18a | Kostas Papadimitriou | this._byId[model.id] = model;
|
683 | 8d08f18a | Kostas Papadimitriou | } |
684 | 8d08f18a | Kostas Papadimitriou | this.trigger.apply(this, arguments); |
685 | 8d08f18a | Kostas Papadimitriou | } |
686 | 8d08f18a | Kostas Papadimitriou | |
687 | 8d08f18a | Kostas Papadimitriou | }); |
688 | 8d08f18a | Kostas Papadimitriou | |
689 | 8d08f18a | Kostas Papadimitriou | // Underscore methods that we want to implement on the Collection.
|
690 | 8d08f18a | Kostas Papadimitriou | var methods = ['forEach', 'each', 'map', 'reduce', 'reduceRight', 'find', 'detect', |
691 | 8d08f18a | Kostas Papadimitriou | 'filter', 'select', 'reject', 'every', 'all', 'some', 'any', 'include', |
692 | 8d08f18a | Kostas Papadimitriou | 'contains', 'invoke', 'max', 'min', 'sortBy', 'sortedIndex', 'toArray', 'size', |
693 | 8d08f18a | Kostas Papadimitriou | 'first', 'rest', 'last', 'without', 'indexOf', 'lastIndexOf', 'isEmpty', 'groupBy']; |
694 | 8d08f18a | Kostas Papadimitriou | |
695 | 8d08f18a | Kostas Papadimitriou | // Mix in each Underscore method as a proxy to `Collection#models`.
|
696 | 8d08f18a | Kostas Papadimitriou | _.each(methods, function(method) {
|
697 | 8d08f18a | Kostas Papadimitriou | Backbone.Collection.prototype[method] = function() {
|
698 | 8d08f18a | Kostas Papadimitriou | return _[method].apply(_, [this.models].concat(_.toArray(arguments))); |
699 | 8d08f18a | Kostas Papadimitriou | }; |
700 | 8d08f18a | Kostas Papadimitriou | }); |
701 | 8d08f18a | Kostas Papadimitriou | |
702 | 8d08f18a | Kostas Papadimitriou | // Backbone.Router
|
703 | 8d08f18a | Kostas Papadimitriou | // -------------------
|
704 | 8d08f18a | Kostas Papadimitriou | |
705 | 8d08f18a | Kostas Papadimitriou | // Routers map faux-URLs to actions, and fire events when routes are
|
706 | 8d08f18a | Kostas Papadimitriou | // matched. Creating a new one sets its `routes` hash, if not set statically.
|
707 | 8d08f18a | Kostas Papadimitriou | Backbone.Router = function(options) { |
708 | 8d08f18a | Kostas Papadimitriou | options || (options = {}); |
709 | 8d08f18a | Kostas Papadimitriou | if (options.routes) this.routes = options.routes; |
710 | 8d08f18a | Kostas Papadimitriou | this._bindRoutes();
|
711 | 8d08f18a | Kostas Papadimitriou | this.initialize.apply(this, arguments); |
712 | 8d08f18a | Kostas Papadimitriou | }; |
713 | 8d08f18a | Kostas Papadimitriou | |
714 | 8d08f18a | Kostas Papadimitriou | // Cached regular expressions for matching named param parts and splatted
|
715 | 8d08f18a | Kostas Papadimitriou | // parts of route strings.
|
716 | 8d08f18a | Kostas Papadimitriou | var namedParam = /:([\w\d]+)/g; |
717 | 8d08f18a | Kostas Papadimitriou | var splatParam = /\*([\w\d]+)/g; |
718 | 8d08f18a | Kostas Papadimitriou | var escapeRegExp = /[-[\]{}()+?.,\\^$|#\s]/g; |
719 | 8d08f18a | Kostas Papadimitriou | |
720 | 8d08f18a | Kostas Papadimitriou | // Set up all inheritable **Backbone.Router** properties and methods.
|
721 | 8d08f18a | Kostas Papadimitriou | _.extend(Backbone.Router.prototype, Backbone.Events, { |
722 | 8d08f18a | Kostas Papadimitriou | |
723 | 8d08f18a | Kostas Papadimitriou | // Initialize is an empty function by default. Override it with your own
|
724 | 8d08f18a | Kostas Papadimitriou | // initialization logic.
|
725 | 8d08f18a | Kostas Papadimitriou | initialize : function(){}, |
726 | 8d08f18a | Kostas Papadimitriou | |
727 | 8d08f18a | Kostas Papadimitriou | // Manually bind a single named route to a callback. For example:
|
728 | 8d08f18a | Kostas Papadimitriou | //
|
729 | 8d08f18a | Kostas Papadimitriou | // this.route('search/:query/p:num', 'search', function(query, num) {
|
730 | 8d08f18a | Kostas Papadimitriou | // ...
|
731 | 8d08f18a | Kostas Papadimitriou | // });
|
732 | 8d08f18a | Kostas Papadimitriou | //
|
733 | 8d08f18a | Kostas Papadimitriou | route : function(route, name, callback) { |
734 | 8d08f18a | Kostas Papadimitriou | Backbone.history || (Backbone.history = new Backbone.History);
|
735 | 8d08f18a | Kostas Papadimitriou | if (!_.isRegExp(route)) route = this._routeToRegExp(route); |
736 | 8d08f18a | Kostas Papadimitriou | Backbone.history.route(route, _.bind(function(fragment) {
|
737 | 8d08f18a | Kostas Papadimitriou | var args = this._extractParameters(route, fragment); |
738 | 2f834e7d | Kostas Papadimitriou | callback && callback.apply(this, args);
|
739 | 8d08f18a | Kostas Papadimitriou | this.trigger.apply(this, ['route:' + name].concat(args)); |
740 | 8d08f18a | Kostas Papadimitriou | }, this));
|
741 | 8d08f18a | Kostas Papadimitriou | }, |
742 | 8d08f18a | Kostas Papadimitriou | |
743 | 8d08f18a | Kostas Papadimitriou | // Simple proxy to `Backbone.history` to save a fragment into the history.
|
744 | 8d08f18a | Kostas Papadimitriou | navigate : function(fragment, triggerRoute) { |
745 | 8d08f18a | Kostas Papadimitriou | Backbone.history.navigate(fragment, triggerRoute); |
746 | 8d08f18a | Kostas Papadimitriou | }, |
747 | 8d08f18a | Kostas Papadimitriou | |
748 | 8d08f18a | Kostas Papadimitriou | // Bind all defined routes to `Backbone.history`. We have to reverse the
|
749 | 8d08f18a | Kostas Papadimitriou | // order of the routes here to support behavior where the most general
|
750 | 8d08f18a | Kostas Papadimitriou | // routes can be defined at the bottom of the route map.
|
751 | 8d08f18a | Kostas Papadimitriou | _bindRoutes : function() { |
752 | 8d08f18a | Kostas Papadimitriou | if (!this.routes) return; |
753 | 8d08f18a | Kostas Papadimitriou | var routes = [];
|
754 | 8d08f18a | Kostas Papadimitriou | for (var route in this.routes) { |
755 | 8d08f18a | Kostas Papadimitriou | routes.unshift([route, this.routes[route]]);
|
756 | 8d08f18a | Kostas Papadimitriou | } |
757 | 8d08f18a | Kostas Papadimitriou | for (var i = 0, l = routes.length; i < l; i++) { |
758 | 8d08f18a | Kostas Papadimitriou | this.route(routes[i][0], routes[i][1], this[routes[i][1]]); |
759 | 8d08f18a | Kostas Papadimitriou | } |
760 | 8d08f18a | Kostas Papadimitriou | }, |
761 | 8d08f18a | Kostas Papadimitriou | |
762 | 8d08f18a | Kostas Papadimitriou | // Convert a route string into a regular expression, suitable for matching
|
763 | 8d08f18a | Kostas Papadimitriou | // against the current location hash.
|
764 | 8d08f18a | Kostas Papadimitriou | _routeToRegExp : function(route) { |
765 | 8d08f18a | Kostas Papadimitriou | route = route.replace(escapeRegExp, "\\$&")
|
766 | 8d08f18a | Kostas Papadimitriou | .replace(namedParam, "([^\/]*)")
|
767 | 8d08f18a | Kostas Papadimitriou | .replace(splatParam, "(.*?)");
|
768 | 8d08f18a | Kostas Papadimitriou | return new RegExp('^' + route + '$'); |
769 | 8d08f18a | Kostas Papadimitriou | }, |
770 | 8d08f18a | Kostas Papadimitriou | |
771 | 8d08f18a | Kostas Papadimitriou | // Given a route, and a URL fragment that it matches, return the array of
|
772 | 8d08f18a | Kostas Papadimitriou | // extracted parameters.
|
773 | 8d08f18a | Kostas Papadimitriou | _extractParameters : function(route, fragment) { |
774 | 8d08f18a | Kostas Papadimitriou | return route.exec(fragment).slice(1); |
775 | 8d08f18a | Kostas Papadimitriou | } |
776 | 8d08f18a | Kostas Papadimitriou | |
777 | 8d08f18a | Kostas Papadimitriou | }); |
778 | 8d08f18a | Kostas Papadimitriou | |
779 | 8d08f18a | Kostas Papadimitriou | // Backbone.History
|
780 | 8d08f18a | Kostas Papadimitriou | // ----------------
|
781 | 8d08f18a | Kostas Papadimitriou | |
782 | 8d08f18a | Kostas Papadimitriou | // Handles cross-browser history management, based on URL fragments. If the
|
783 | 8d08f18a | Kostas Papadimitriou | // browser does not support `onhashchange`, falls back to polling.
|
784 | 8d08f18a | Kostas Papadimitriou | Backbone.History = function() { |
785 | 8d08f18a | Kostas Papadimitriou | this.handlers = [];
|
786 | 8d08f18a | Kostas Papadimitriou | _.bindAll(this, 'checkUrl'); |
787 | 8d08f18a | Kostas Papadimitriou | }; |
788 | 8d08f18a | Kostas Papadimitriou | |
789 | 8d08f18a | Kostas Papadimitriou | // Cached regex for cleaning hashes.
|
790 | 8d08f18a | Kostas Papadimitriou | var hashStrip = /^#*/; |
791 | 8d08f18a | Kostas Papadimitriou | |
792 | 8d08f18a | Kostas Papadimitriou | // Cached regex for detecting MSIE.
|
793 | 8d08f18a | Kostas Papadimitriou | var isExplorer = /msie [\w.]+/; |
794 | 8d08f18a | Kostas Papadimitriou | |
795 | 8d08f18a | Kostas Papadimitriou | // Has the history handling already been started?
|
796 | 8d08f18a | Kostas Papadimitriou | var historyStarted = false; |
797 | 8d08f18a | Kostas Papadimitriou | |
798 | 8d08f18a | Kostas Papadimitriou | // Set up all inheritable **Backbone.History** properties and methods.
|
799 | 8d08f18a | Kostas Papadimitriou | _.extend(Backbone.History.prototype, { |
800 | 8d08f18a | Kostas Papadimitriou | |
801 | 8d08f18a | Kostas Papadimitriou | // The default interval to poll for hash changes, if necessary, is
|
802 | 8d08f18a | Kostas Papadimitriou | // twenty times a second.
|
803 | 8d08f18a | Kostas Papadimitriou | interval: 50, |
804 | 8d08f18a | Kostas Papadimitriou | |
805 | 8d08f18a | Kostas Papadimitriou | // Get the cross-browser normalized URL fragment, either from the URL,
|
806 | 8d08f18a | Kostas Papadimitriou | // the hash, or the override.
|
807 | 8d08f18a | Kostas Papadimitriou | getFragment : function(fragment, forcePushState) { |
808 | 8d08f18a | Kostas Papadimitriou | if (fragment == null) { |
809 | 8d08f18a | Kostas Papadimitriou | if (this._hasPushState || forcePushState) { |
810 | 8d08f18a | Kostas Papadimitriou | fragment = window.location.pathname; |
811 | 8d08f18a | Kostas Papadimitriou | var search = window.location.search;
|
812 | 8d08f18a | Kostas Papadimitriou | if (search) fragment += search;
|
813 | 8d08f18a | Kostas Papadimitriou | } else {
|
814 | 8d08f18a | Kostas Papadimitriou | fragment = window.location.hash; |
815 | 8d08f18a | Kostas Papadimitriou | } |
816 | 8d08f18a | Kostas Papadimitriou | } |
817 | 2f834e7d | Kostas Papadimitriou | fragment = decodeURIComponent(fragment.replace(hashStrip, ''));
|
818 | 2f834e7d | Kostas Papadimitriou | if (!fragment.indexOf(this.options.root)) fragment = fragment.substr(this.options.root.length); |
819 | 2f834e7d | Kostas Papadimitriou | return fragment;
|
820 | 8d08f18a | Kostas Papadimitriou | }, |
821 | 8d08f18a | Kostas Papadimitriou | |
822 | 8d08f18a | Kostas Papadimitriou | // Start the hash change handling, returning `true` if the current URL matches
|
823 | 8d08f18a | Kostas Papadimitriou | // an existing route, and `false` otherwise.
|
824 | 8d08f18a | Kostas Papadimitriou | start : function(options) { |
825 | 8d08f18a | Kostas Papadimitriou | |
826 | 8d08f18a | Kostas Papadimitriou | // Figure out the initial configuration. Do we need an iframe?
|
827 | 8d08f18a | Kostas Papadimitriou | // Is pushState desired ... is it available?
|
828 | 8d08f18a | Kostas Papadimitriou | if (historyStarted) throw new Error("Backbone.history has already been started"); |
829 | 8d08f18a | Kostas Papadimitriou | this.options = _.extend({}, {root: '/'}, this.options, options); |
830 | 8d08f18a | Kostas Papadimitriou | this._wantsPushState = !!this.options.pushState; |
831 | 8d08f18a | Kostas Papadimitriou | this._hasPushState = !!(this.options.pushState && window.history && window.history.pushState); |
832 | 8d08f18a | Kostas Papadimitriou | var fragment = this.getFragment(); |
833 | 8d08f18a | Kostas Papadimitriou | var docMode = document.documentMode;
|
834 | 8d08f18a | Kostas Papadimitriou | var oldIE = (isExplorer.exec(navigator.userAgent.toLowerCase()) && (!docMode || docMode <= 7)); |
835 | 8d08f18a | Kostas Papadimitriou | if (oldIE) {
|
836 | 8d08f18a | Kostas Papadimitriou | this.iframe = $('<iframe src="javascript:0" tabindex="-1" />').hide().appendTo('body')[0].contentWindow; |
837 | 8d08f18a | Kostas Papadimitriou | this.navigate(fragment);
|
838 | 8d08f18a | Kostas Papadimitriou | } |
839 | 8d08f18a | Kostas Papadimitriou | |
840 | 8d08f18a | Kostas Papadimitriou | // Depending on whether we're using pushState or hashes, and whether
|
841 | 8d08f18a | Kostas Papadimitriou | // 'onhashchange' is supported, determine how we check the URL state.
|
842 | 8d08f18a | Kostas Papadimitriou | if (this._hasPushState) { |
843 | 8d08f18a | Kostas Papadimitriou | $(window).bind('popstate', this.checkUrl); |
844 | 8d08f18a | Kostas Papadimitriou | } else if ('onhashchange' in window && !oldIE) { |
845 | 8d08f18a | Kostas Papadimitriou | $(window).bind('hashchange', this.checkUrl); |
846 | 8d08f18a | Kostas Papadimitriou | } else {
|
847 | 8d08f18a | Kostas Papadimitriou | setInterval(this.checkUrl, this.interval); |
848 | 8d08f18a | Kostas Papadimitriou | } |
849 | 8d08f18a | Kostas Papadimitriou | |
850 | 8d08f18a | Kostas Papadimitriou | // Determine if we need to change the base url, for a pushState link
|
851 | 8d08f18a | Kostas Papadimitriou | // opened by a non-pushState browser.
|
852 | 8d08f18a | Kostas Papadimitriou | this.fragment = fragment;
|
853 | 8d08f18a | Kostas Papadimitriou | historyStarted = true;
|
854 | 8d08f18a | Kostas Papadimitriou | var loc = window.location;
|
855 | 8d08f18a | Kostas Papadimitriou | var atRoot = loc.pathname == this.options.root; |
856 | 8d08f18a | Kostas Papadimitriou | if (this._wantsPushState && !this._hasPushState && !atRoot) { |
857 | 8d08f18a | Kostas Papadimitriou | this.fragment = this.getFragment(null, true); |
858 | 8d08f18a | Kostas Papadimitriou | window.location.replace(this.options.root + '#' + this.fragment); |
859 | 8d08f18a | Kostas Papadimitriou | // Return immediately as browser will do redirect to new url
|
860 | 8d08f18a | Kostas Papadimitriou | return true; |
861 | 8d08f18a | Kostas Papadimitriou | } else if (this._wantsPushState && this._hasPushState && atRoot && loc.hash) { |
862 | 8d08f18a | Kostas Papadimitriou | this.fragment = loc.hash.replace(hashStrip, ''); |
863 | 8d08f18a | Kostas Papadimitriou | window.history.replaceState({}, document.title, loc.protocol + '//' + loc.host + this.options.root + this.fragment); |
864 | 8d08f18a | Kostas Papadimitriou | } |
865 | 8d08f18a | Kostas Papadimitriou | |
866 | 8d08f18a | Kostas Papadimitriou | if (!this.options.silent) { |
867 | 8d08f18a | Kostas Papadimitriou | return this.loadUrl(); |
868 | 8d08f18a | Kostas Papadimitriou | } |
869 | 8d08f18a | Kostas Papadimitriou | }, |
870 | 8d08f18a | Kostas Papadimitriou | |
871 | 8d08f18a | Kostas Papadimitriou | // Add a route to be tested when the fragment changes. Routes added later may
|
872 | 8d08f18a | Kostas Papadimitriou | // override previous routes.
|
873 | 8d08f18a | Kostas Papadimitriou | route : function(route, callback) { |
874 | 8d08f18a | Kostas Papadimitriou | this.handlers.unshift({route : route, callback : callback}); |
875 | 8d08f18a | Kostas Papadimitriou | }, |
876 | 8d08f18a | Kostas Papadimitriou | |
877 | 8d08f18a | Kostas Papadimitriou | // Checks the current URL to see if it has changed, and if it has,
|
878 | 8d08f18a | Kostas Papadimitriou | // calls `loadUrl`, normalizing across the hidden iframe.
|
879 | 8d08f18a | Kostas Papadimitriou | checkUrl : function(e) { |
880 | 8d08f18a | Kostas Papadimitriou | var current = this.getFragment(); |
881 | 8d08f18a | Kostas Papadimitriou | if (current == this.fragment && this.iframe) current = this.getFragment(this.iframe.location.hash); |
882 | 8d08f18a | Kostas Papadimitriou | if (current == this.fragment || current == decodeURIComponent(this.fragment)) return false; |
883 | 8d08f18a | Kostas Papadimitriou | if (this.iframe) this.navigate(current); |
884 | 8d08f18a | Kostas Papadimitriou | this.loadUrl() || this.loadUrl(window.location.hash); |
885 | 8d08f18a | Kostas Papadimitriou | }, |
886 | 8d08f18a | Kostas Papadimitriou | |
887 | 8d08f18a | Kostas Papadimitriou | // Attempt to load the current URL fragment. If a route succeeds with a
|
888 | 8d08f18a | Kostas Papadimitriou | // match, returns `true`. If no defined routes matches the fragment,
|
889 | 8d08f18a | Kostas Papadimitriou | // returns `false`.
|
890 | 8d08f18a | Kostas Papadimitriou | loadUrl : function(fragmentOverride) { |
891 | 8d08f18a | Kostas Papadimitriou | var fragment = this.fragment = this.getFragment(fragmentOverride); |
892 | 8d08f18a | Kostas Papadimitriou | var matched = _.any(this.handlers, function(handler) { |
893 | 8d08f18a | Kostas Papadimitriou | if (handler.route.test(fragment)) {
|
894 | 8d08f18a | Kostas Papadimitriou | handler.callback(fragment); |
895 | 8d08f18a | Kostas Papadimitriou | return true; |
896 | 8d08f18a | Kostas Papadimitriou | } |
897 | 8d08f18a | Kostas Papadimitriou | }); |
898 | 8d08f18a | Kostas Papadimitriou | return matched;
|
899 | 8d08f18a | Kostas Papadimitriou | }, |
900 | 8d08f18a | Kostas Papadimitriou | |
901 | 8d08f18a | Kostas Papadimitriou | // Save a fragment into the hash history. You are responsible for properly
|
902 | 8d08f18a | Kostas Papadimitriou | // URL-encoding the fragment in advance. This does not trigger
|
903 | 8d08f18a | Kostas Papadimitriou | // a `hashchange` event.
|
904 | 8d08f18a | Kostas Papadimitriou | navigate : function(fragment, triggerRoute) { |
905 | 8d08f18a | Kostas Papadimitriou | var frag = (fragment || '').replace(hashStrip, ''); |
906 | 8d08f18a | Kostas Papadimitriou | if (this.fragment == frag || this.fragment == decodeURIComponent(frag)) return; |
907 | 8d08f18a | Kostas Papadimitriou | if (this._hasPushState) { |
908 | 8d08f18a | Kostas Papadimitriou | var loc = window.location;
|
909 | 8d08f18a | Kostas Papadimitriou | if (frag.indexOf(this.options.root) != 0) frag = this.options.root + frag; |
910 | 8d08f18a | Kostas Papadimitriou | this.fragment = frag;
|
911 | 8d08f18a | Kostas Papadimitriou | window.history.pushState({}, document.title, loc.protocol + '//' + loc.host + frag);
|
912 | 8d08f18a | Kostas Papadimitriou | } else {
|
913 | 8d08f18a | Kostas Papadimitriou | window.location.hash = this.fragment = frag;
|
914 | 8d08f18a | Kostas Papadimitriou | if (this.iframe && (frag != this.getFragment(this.iframe.location.hash))) { |
915 | 8d08f18a | Kostas Papadimitriou | this.iframe.document.open().close();
|
916 | 8d08f18a | Kostas Papadimitriou | this.iframe.location.hash = frag;
|
917 | 8d08f18a | Kostas Papadimitriou | } |
918 | 8d08f18a | Kostas Papadimitriou | } |
919 | 8d08f18a | Kostas Papadimitriou | if (triggerRoute) this.loadUrl(fragment); |
920 | 8d08f18a | Kostas Papadimitriou | } |
921 | 8d08f18a | Kostas Papadimitriou | |
922 | 8d08f18a | Kostas Papadimitriou | }); |
923 | 8d08f18a | Kostas Papadimitriou | |
924 | 8d08f18a | Kostas Papadimitriou | // Backbone.View
|
925 | 8d08f18a | Kostas Papadimitriou | // -------------
|
926 | 8d08f18a | Kostas Papadimitriou | |
927 | 8d08f18a | Kostas Papadimitriou | // Creating a Backbone.View creates its initial element outside of the DOM,
|
928 | 8d08f18a | Kostas Papadimitriou | // if an existing element is not provided...
|
929 | 8d08f18a | Kostas Papadimitriou | Backbone.View = function(options) { |
930 | 8d08f18a | Kostas Papadimitriou | this.cid = _.uniqueId('view'); |
931 | 8d08f18a | Kostas Papadimitriou | this._configure(options || {});
|
932 | 8d08f18a | Kostas Papadimitriou | this._ensureElement();
|
933 | 8d08f18a | Kostas Papadimitriou | this.delegateEvents();
|
934 | 8d08f18a | Kostas Papadimitriou | this.initialize.apply(this, arguments); |
935 | 8d08f18a | Kostas Papadimitriou | }; |
936 | 8d08f18a | Kostas Papadimitriou | |
937 | 8d08f18a | Kostas Papadimitriou | // Element lookup, scoped to DOM elements within the current view.
|
938 | 8d08f18a | Kostas Papadimitriou | // This should be prefered to global lookups, if you're dealing with
|
939 | 8d08f18a | Kostas Papadimitriou | // a specific view.
|
940 | 8d08f18a | Kostas Papadimitriou | var selectorDelegate = function(selector) { |
941 | 2f834e7d | Kostas Papadimitriou | return $(selector, this.el); |
942 | 8d08f18a | Kostas Papadimitriou | }; |
943 | 8d08f18a | Kostas Papadimitriou | |
944 | 8d08f18a | Kostas Papadimitriou | // Cached regex to split keys for `delegate`.
|
945 | 8d08f18a | Kostas Papadimitriou | var eventSplitter = /^(\S+)\s*(.*)$/; |
946 | 8d08f18a | Kostas Papadimitriou | |
947 | 8d08f18a | Kostas Papadimitriou | // List of view options to be merged as properties.
|
948 | 8d08f18a | Kostas Papadimitriou | var viewOptions = ['model', 'collection', 'el', 'id', 'attributes', 'className', 'tagName']; |
949 | 8d08f18a | Kostas Papadimitriou | |
950 | 8d08f18a | Kostas Papadimitriou | // Set up all inheritable **Backbone.View** properties and methods.
|
951 | 8d08f18a | Kostas Papadimitriou | _.extend(Backbone.View.prototype, Backbone.Events, { |
952 | 8d08f18a | Kostas Papadimitriou | |
953 | 8d08f18a | Kostas Papadimitriou | // The default `tagName` of a View's element is `"div"`.
|
954 | 8d08f18a | Kostas Papadimitriou | tagName : 'div', |
955 | 8d08f18a | Kostas Papadimitriou | |
956 | 8d08f18a | Kostas Papadimitriou | // Attach the `selectorDelegate` function as the `$` property.
|
957 | 8d08f18a | Kostas Papadimitriou | $ : selectorDelegate,
|
958 | 8d08f18a | Kostas Papadimitriou | |
959 | 8d08f18a | Kostas Papadimitriou | // Initialize is an empty function by default. Override it with your own
|
960 | 8d08f18a | Kostas Papadimitriou | // initialization logic.
|
961 | 8d08f18a | Kostas Papadimitriou | initialize : function(){}, |
962 | 8d08f18a | Kostas Papadimitriou | |
963 | 8d08f18a | Kostas Papadimitriou | // **render** is the core function that your view should override, in order
|
964 | 8d08f18a | Kostas Papadimitriou | // to populate its element (`this.el`), with the appropriate HTML. The
|
965 | 8d08f18a | Kostas Papadimitriou | // convention is for **render** to always return `this`.
|
966 | 8d08f18a | Kostas Papadimitriou | render : function() { |
967 | 8d08f18a | Kostas Papadimitriou | return this; |
968 | 8d08f18a | Kostas Papadimitriou | }, |
969 | 8d08f18a | Kostas Papadimitriou | |
970 | 8d08f18a | Kostas Papadimitriou | // Remove this view from the DOM. Note that the view isn't present in the
|
971 | 8d08f18a | Kostas Papadimitriou | // DOM by default, so calling this method may be a no-op.
|
972 | 8d08f18a | Kostas Papadimitriou | remove : function() { |
973 | 8d08f18a | Kostas Papadimitriou | $(this.el).remove(); |
974 | 8d08f18a | Kostas Papadimitriou | return this; |
975 | 8d08f18a | Kostas Papadimitriou | }, |
976 | 8d08f18a | Kostas Papadimitriou | |
977 | 8d08f18a | Kostas Papadimitriou | // For small amounts of DOM Elements, where a full-blown template isn't
|
978 | 8d08f18a | Kostas Papadimitriou | // needed, use **make** to manufacture elements, one at a time.
|
979 | 8d08f18a | Kostas Papadimitriou | //
|
980 | 8d08f18a | Kostas Papadimitriou | // var el = this.make('li', {'class': 'row'}, this.model.escape('title'));
|
981 | 8d08f18a | Kostas Papadimitriou | //
|
982 | 8d08f18a | Kostas Papadimitriou | make : function(tagName, attributes, content) { |
983 | 8d08f18a | Kostas Papadimitriou | var el = document.createElement(tagName);
|
984 | 8d08f18a | Kostas Papadimitriou | if (attributes) $(el).attr(attributes); |
985 | 8d08f18a | Kostas Papadimitriou | if (content) $(el).html(content); |
986 | 8d08f18a | Kostas Papadimitriou | return el;
|
987 | 8d08f18a | Kostas Papadimitriou | }, |
988 | 8d08f18a | Kostas Papadimitriou | |
989 | 2f834e7d | Kostas Papadimitriou | // Set callbacks, where `this.events` is a hash of
|
990 | 8d08f18a | Kostas Papadimitriou | //
|
991 | 8d08f18a | Kostas Papadimitriou | // *{"event selector": "callback"}*
|
992 | 8d08f18a | Kostas Papadimitriou | //
|
993 | 8d08f18a | Kostas Papadimitriou | // {
|
994 | 8d08f18a | Kostas Papadimitriou | // 'mousedown .title': 'edit',
|
995 | 8d08f18a | Kostas Papadimitriou | // 'click .button': 'save'
|
996 | 8d08f18a | Kostas Papadimitriou | // }
|
997 | 8d08f18a | Kostas Papadimitriou | //
|
998 | 8d08f18a | Kostas Papadimitriou | // pairs. Callbacks will be bound to the view, with `this` set properly.
|
999 | 8d08f18a | Kostas Papadimitriou | // Uses event delegation for efficiency.
|
1000 | 8d08f18a | Kostas Papadimitriou | // Omitting the selector binds the event to `this.el`.
|
1001 | 8d08f18a | Kostas Papadimitriou | // This only works for delegate-able events: not `focus`, `blur`, and
|
1002 | 8d08f18a | Kostas Papadimitriou | // not `change`, `submit`, and `reset` in Internet Explorer.
|
1003 | 8d08f18a | Kostas Papadimitriou | delegateEvents : function(events) { |
1004 | 8d08f18a | Kostas Papadimitriou | if (!(events || (events = this.events))) return; |
1005 | 8d08f18a | Kostas Papadimitriou | if (_.isFunction(events)) events = events.call(this); |
1006 | 2f834e7d | Kostas Papadimitriou | this.undelegateEvents();
|
1007 | 8d08f18a | Kostas Papadimitriou | for (var key in events) { |
1008 | 8d08f18a | Kostas Papadimitriou | var method = this[events[key]]; |
1009 | 8d08f18a | Kostas Papadimitriou | if (!method) throw new Error('Event "' + events[key] + '" does not exist'); |
1010 | 8d08f18a | Kostas Papadimitriou | var match = key.match(eventSplitter);
|
1011 | 8d08f18a | Kostas Papadimitriou | var eventName = match[1], selector = match[2]; |
1012 | 8d08f18a | Kostas Papadimitriou | method = _.bind(method, this);
|
1013 | 8d08f18a | Kostas Papadimitriou | eventName += '.delegateEvents' + this.cid; |
1014 | 8d08f18a | Kostas Papadimitriou | if (selector === '') { |
1015 | 8d08f18a | Kostas Papadimitriou | $(this.el).bind(eventName, method); |
1016 | 8d08f18a | Kostas Papadimitriou | } else {
|
1017 | 8d08f18a | Kostas Papadimitriou | $(this.el).delegate(selector, eventName, method); |
1018 | 8d08f18a | Kostas Papadimitriou | } |
1019 | 8d08f18a | Kostas Papadimitriou | } |
1020 | 8d08f18a | Kostas Papadimitriou | }, |
1021 | 8d08f18a | Kostas Papadimitriou | |
1022 | 2f834e7d | Kostas Papadimitriou | // Clears all callbacks previously bound to the view with `delegateEvents`.
|
1023 | 2f834e7d | Kostas Papadimitriou | undelegateEvents : function() { |
1024 | 2f834e7d | Kostas Papadimitriou | $(this.el).unbind('.delegateEvents' + this.cid); |
1025 | 2f834e7d | Kostas Papadimitriou | }, |
1026 | 2f834e7d | Kostas Papadimitriou | |
1027 | 8d08f18a | Kostas Papadimitriou | // Performs the initial configuration of a View with a set of options.
|
1028 | 8d08f18a | Kostas Papadimitriou | // Keys with special meaning *(model, collection, id, className)*, are
|
1029 | 8d08f18a | Kostas Papadimitriou | // attached directly to the view.
|
1030 | 8d08f18a | Kostas Papadimitriou | _configure : function(options) { |
1031 | 8d08f18a | Kostas Papadimitriou | if (this.options) options = _.extend({}, this.options, options); |
1032 | 8d08f18a | Kostas Papadimitriou | for (var i = 0, l = viewOptions.length; i < l; i++) { |
1033 | 8d08f18a | Kostas Papadimitriou | var attr = viewOptions[i];
|
1034 | 8d08f18a | Kostas Papadimitriou | if (options[attr]) this[attr] = options[attr]; |
1035 | 8d08f18a | Kostas Papadimitriou | } |
1036 | 8d08f18a | Kostas Papadimitriou | this.options = options;
|
1037 | 8d08f18a | Kostas Papadimitriou | }, |
1038 | 8d08f18a | Kostas Papadimitriou | |
1039 | 8d08f18a | Kostas Papadimitriou | // Ensure that the View has a DOM element to render into.
|
1040 | 8d08f18a | Kostas Papadimitriou | // If `this.el` is a string, pass it through `$()`, take the first
|
1041 | 8d08f18a | Kostas Papadimitriou | // matching element, and re-assign it to `el`. Otherwise, create
|
1042 | 8d08f18a | Kostas Papadimitriou | // an element from the `id`, `className` and `tagName` properties.
|
1043 | 8d08f18a | Kostas Papadimitriou | _ensureElement : function() { |
1044 | 8d08f18a | Kostas Papadimitriou | if (!this.el) { |
1045 | 8d08f18a | Kostas Papadimitriou | var attrs = this.attributes || {}; |
1046 | 8d08f18a | Kostas Papadimitriou | if (this.id) attrs.id = this.id; |
1047 | 8d08f18a | Kostas Papadimitriou | if (this.className) attrs['class'] = this.className; |
1048 | 8d08f18a | Kostas Papadimitriou | this.el = this.make(this.tagName, attrs); |
1049 | 8d08f18a | Kostas Papadimitriou | } else if (_.isString(this.el)) { |
1050 | 8d08f18a | Kostas Papadimitriou | this.el = $(this.el).get(0); |
1051 | 8d08f18a | Kostas Papadimitriou | } |
1052 | 8d08f18a | Kostas Papadimitriou | } |
1053 | 8d08f18a | Kostas Papadimitriou | |
1054 | 8d08f18a | Kostas Papadimitriou | }); |
1055 | 8d08f18a | Kostas Papadimitriou | |
1056 | 8d08f18a | Kostas Papadimitriou | // The self-propagating extend function that Backbone classes use.
|
1057 | 8d08f18a | Kostas Papadimitriou | var extend = function (protoProps, classProps) { |
1058 | 8d08f18a | Kostas Papadimitriou | var child = inherits(this, protoProps, classProps); |
1059 | 8d08f18a | Kostas Papadimitriou | child.extend = this.extend;
|
1060 | 8d08f18a | Kostas Papadimitriou | return child;
|
1061 | 8d08f18a | Kostas Papadimitriou | }; |
1062 | 8d08f18a | Kostas Papadimitriou | |
1063 | 8d08f18a | Kostas Papadimitriou | // Set up inheritance for the model, collection, and view.
|
1064 | 8d08f18a | Kostas Papadimitriou | Backbone.Model.extend = Backbone.Collection.extend = |
1065 | 8d08f18a | Kostas Papadimitriou | Backbone.Router.extend = Backbone.View.extend = extend; |
1066 | 8d08f18a | Kostas Papadimitriou | |
1067 | 8d08f18a | Kostas Papadimitriou | // Map from CRUD to HTTP for our default `Backbone.sync` implementation.
|
1068 | 8d08f18a | Kostas Papadimitriou | var methodMap = {
|
1069 | 8d08f18a | Kostas Papadimitriou | 'create': 'POST', |
1070 | 8d08f18a | Kostas Papadimitriou | 'update': 'PUT', |
1071 | 8d08f18a | Kostas Papadimitriou | 'delete': 'DELETE', |
1072 | 258235f4 | Kostas Papadimitriou | 'read' : 'GET', |
1073 | 258235f4 | Kostas Papadimitriou | 'head' : 'HEAD' |
1074 | 8d08f18a | Kostas Papadimitriou | }; |
1075 | 8d08f18a | Kostas Papadimitriou | |
1076 | 8d08f18a | Kostas Papadimitriou | // Backbone.sync
|
1077 | 8d08f18a | Kostas Papadimitriou | // -------------
|
1078 | 8d08f18a | Kostas Papadimitriou | |
1079 | 8d08f18a | Kostas Papadimitriou | // Override this function to change the manner in which Backbone persists
|
1080 | 8d08f18a | Kostas Papadimitriou | // models to the server. You will be passed the type of request, and the
|
1081 | 2f834e7d | Kostas Papadimitriou | // model in question. By default, makes a RESTful Ajax request
|
1082 | 8d08f18a | Kostas Papadimitriou | // to the model's `url()`. Some possible customizations could be:
|
1083 | 8d08f18a | Kostas Papadimitriou | //
|
1084 | 8d08f18a | Kostas Papadimitriou | // * Use `setTimeout` to batch rapid-fire updates into a single request.
|
1085 | 8d08f18a | Kostas Papadimitriou | // * Send up the models as XML instead of JSON.
|
1086 | 8d08f18a | Kostas Papadimitriou | // * Persist models via WebSockets instead of Ajax.
|
1087 | 8d08f18a | Kostas Papadimitriou | //
|
1088 | 8d08f18a | Kostas Papadimitriou | // Turn on `Backbone.emulateHTTP` in order to send `PUT` and `DELETE` requests
|
1089 | 8d08f18a | Kostas Papadimitriou | // as `POST`, with a `_method` parameter containing the true HTTP method,
|
1090 | 8d08f18a | Kostas Papadimitriou | // as well as all requests with the body as `application/x-www-form-urlencoded` instead of
|
1091 | 8d08f18a | Kostas Papadimitriou | // `application/json` with the model in a param named `model`.
|
1092 | 8d08f18a | Kostas Papadimitriou | // Useful when interfacing with server-side languages like **PHP** that make
|
1093 | 8d08f18a | Kostas Papadimitriou | // it difficult to read the body of `PUT` requests.
|
1094 | 8d08f18a | Kostas Papadimitriou | Backbone.sync = function(method, model, options) { |
1095 | 8d08f18a | Kostas Papadimitriou | var type = methodMap[method];
|
1096 | 8d08f18a | Kostas Papadimitriou | |
1097 | 8d08f18a | Kostas Papadimitriou | // Default JSON-request options.
|
1098 | 2f834e7d | Kostas Papadimitriou | var params = {type : type, dataType : 'json'}; |
1099 | 8d08f18a | Kostas Papadimitriou | |
1100 | 8d08f18a | Kostas Papadimitriou | // Ensure that we have a URL.
|
1101 | 2f834e7d | Kostas Papadimitriou | if (!options.url) {
|
1102 | 8d08f18a | Kostas Papadimitriou | params.url = getUrl(model, options) || urlError(); |
1103 | 8d08f18a | Kostas Papadimitriou | } |
1104 | 8d08f18a | Kostas Papadimitriou | |
1105 | 8d08f18a | Kostas Papadimitriou | // Ensure that we have the appropriate request data.
|
1106 | 2f834e7d | Kostas Papadimitriou | if (!options.data && model && (method == 'create' || method == 'update')) { |
1107 | 8d08f18a | Kostas Papadimitriou | params.contentType = 'application/json';
|
1108 | 8d08f18a | Kostas Papadimitriou | params.data = JSON.stringify(model.toJSON()); |
1109 | 8d08f18a | Kostas Papadimitriou | } |
1110 | 8d08f18a | Kostas Papadimitriou | |
1111 | 8d08f18a | Kostas Papadimitriou | // For older servers, emulate JSON by encoding the request into an HTML-form.
|
1112 | 8d08f18a | Kostas Papadimitriou | if (Backbone.emulateJSON) {
|
1113 | 8d08f18a | Kostas Papadimitriou | params.contentType = 'application/x-www-form-urlencoded';
|
1114 | 2f834e7d | Kostas Papadimitriou | params.data = params.data ? {model : params.data} : {};
|
1115 | 8d08f18a | Kostas Papadimitriou | } |
1116 | 8d08f18a | Kostas Papadimitriou | |
1117 | 8d08f18a | Kostas Papadimitriou | // For older servers, emulate HTTP by mimicking the HTTP method with `_method`
|
1118 | 8d08f18a | Kostas Papadimitriou | // And an `X-HTTP-Method-Override` header.
|
1119 | 8d08f18a | Kostas Papadimitriou | if (Backbone.emulateHTTP) {
|
1120 | 8d08f18a | Kostas Papadimitriou | if (type === 'PUT' || type === 'DELETE') { |
1121 | 8d08f18a | Kostas Papadimitriou | if (Backbone.emulateJSON) params.data._method = type;
|
1122 | 8d08f18a | Kostas Papadimitriou | params.type = 'POST';
|
1123 | 8d08f18a | Kostas Papadimitriou | params.beforeSend = function(xhr) { |
1124 | 8d08f18a | Kostas Papadimitriou | xhr.setRequestHeader('X-HTTP-Method-Override', type);
|
1125 | 8d08f18a | Kostas Papadimitriou | }; |
1126 | 8d08f18a | Kostas Papadimitriou | } |
1127 | 8d08f18a | Kostas Papadimitriou | } |
1128 | 8d08f18a | Kostas Papadimitriou | |
1129 | 8d08f18a | Kostas Papadimitriou | // Don't process data on a non-GET request.
|
1130 | 8d08f18a | Kostas Papadimitriou | if (params.type !== 'GET' && !Backbone.emulateJSON) { |
1131 | 8d08f18a | Kostas Papadimitriou | params.processData = false;
|
1132 | 8d08f18a | Kostas Papadimitriou | } |
1133 | 2f834e7d | Kostas Papadimitriou | |
1134 | 2f834e7d | Kostas Papadimitriou | // Make the request, allowing the user to override any Ajax options.
|
1135 | 2f834e7d | Kostas Papadimitriou | return $.ajax(_.extend(params, options)); |
1136 | 8d08f18a | Kostas Papadimitriou | }; |
1137 | 8d08f18a | Kostas Papadimitriou | |
1138 | 8d08f18a | Kostas Papadimitriou | // Helpers
|
1139 | 8d08f18a | Kostas Papadimitriou | // -------
|
1140 | 8d08f18a | Kostas Papadimitriou | |
1141 | 8d08f18a | Kostas Papadimitriou | // Shared empty constructor function to aid in prototype-chain creation.
|
1142 | 8d08f18a | Kostas Papadimitriou | var ctor = function(){}; |
1143 | 8d08f18a | Kostas Papadimitriou | |
1144 | 8d08f18a | Kostas Papadimitriou | // Helper function to correctly set up the prototype chain, for subclasses.
|
1145 | 8d08f18a | Kostas Papadimitriou | // Similar to `goog.inherits`, but uses a hash of prototype properties and
|
1146 | 8d08f18a | Kostas Papadimitriou | // class properties to be extended.
|
1147 | 8d08f18a | Kostas Papadimitriou | var inherits = function(parent, protoProps, staticProps) { |
1148 | 8d08f18a | Kostas Papadimitriou | var child;
|
1149 | 8d08f18a | Kostas Papadimitriou | |
1150 | 8d08f18a | Kostas Papadimitriou | // The constructor function for the new subclass is either defined by you
|
1151 | 8d08f18a | Kostas Papadimitriou | // (the "constructor" property in your `extend` definition), or defaulted
|
1152 | 8d08f18a | Kostas Papadimitriou | // by us to simply call `super()`.
|
1153 | 8d08f18a | Kostas Papadimitriou | if (protoProps && protoProps.hasOwnProperty('constructor')) { |
1154 | 8d08f18a | Kostas Papadimitriou | child = protoProps.constructor; |
1155 | 8d08f18a | Kostas Papadimitriou | } else {
|
1156 | 8d08f18a | Kostas Papadimitriou | child = function(){ return parent.apply(this, arguments); }; |
1157 | 8d08f18a | Kostas Papadimitriou | } |
1158 | 8d08f18a | Kostas Papadimitriou | |
1159 | 8d08f18a | Kostas Papadimitriou | // Inherit class (static) properties from parent.
|
1160 | 8d08f18a | Kostas Papadimitriou | _.extend(child, parent); |
1161 | 8d08f18a | Kostas Papadimitriou | |
1162 | 8d08f18a | Kostas Papadimitriou | // Set the prototype chain to inherit from `parent`, without calling
|
1163 | 8d08f18a | Kostas Papadimitriou | // `parent`'s constructor function.
|
1164 | 8d08f18a | Kostas Papadimitriou | ctor.prototype = parent.prototype; |
1165 | 8d08f18a | Kostas Papadimitriou | child.prototype = new ctor();
|
1166 | 8d08f18a | Kostas Papadimitriou | |
1167 | 8d08f18a | Kostas Papadimitriou | // Add prototype properties (instance properties) to the subclass,
|
1168 | 8d08f18a | Kostas Papadimitriou | // if supplied.
|
1169 | 8d08f18a | Kostas Papadimitriou | if (protoProps) _.extend(child.prototype, protoProps);
|
1170 | 8d08f18a | Kostas Papadimitriou | |
1171 | 8d08f18a | Kostas Papadimitriou | // Add static properties to the constructor function, if supplied.
|
1172 | 8d08f18a | Kostas Papadimitriou | if (staticProps) _.extend(child, staticProps);
|
1173 | 8d08f18a | Kostas Papadimitriou | |
1174 | 8d08f18a | Kostas Papadimitriou | // Correctly set child's `prototype.constructor`.
|
1175 | 8d08f18a | Kostas Papadimitriou | child.prototype.constructor = child; |
1176 | 8d08f18a | Kostas Papadimitriou | |
1177 | 8d08f18a | Kostas Papadimitriou | // Set a convenience property in case the parent's prototype is needed later.
|
1178 | 8d08f18a | Kostas Papadimitriou | child.__super__ = parent.prototype; |
1179 | 8d08f18a | Kostas Papadimitriou | |
1180 | 8d08f18a | Kostas Papadimitriou | return child;
|
1181 | 8d08f18a | Kostas Papadimitriou | }; |
1182 | 8d08f18a | Kostas Papadimitriou | |
1183 | 8d08f18a | Kostas Papadimitriou | // Helper function to get a URL from a Model or Collection as a property
|
1184 | 8d08f18a | Kostas Papadimitriou | // or as a function.
|
1185 | 8d08f18a | Kostas Papadimitriou | var getUrl = function(object, options) { |
1186 | 8d08f18a | Kostas Papadimitriou | if (!(object && object.url)) return null; |
1187 | 8d08f18a | Kostas Papadimitriou | return _.isFunction(object.url) ? object.url(options) : object.url;
|
1188 | 8d08f18a | Kostas Papadimitriou | }; |
1189 | 8d08f18a | Kostas Papadimitriou | |
1190 | 8d08f18a | Kostas Papadimitriou | // Throw an error when a URL is needed, and none is supplied.
|
1191 | 8d08f18a | Kostas Papadimitriou | var urlError = function() { |
1192 | 8d08f18a | Kostas Papadimitriou | throw new Error('A "url" property or function must be specified'); |
1193 | 8d08f18a | Kostas Papadimitriou | }; |
1194 | 8d08f18a | Kostas Papadimitriou | |
1195 | 8d08f18a | Kostas Papadimitriou | // Wrap an optional error callback with a fallback error event.
|
1196 | 2f834e7d | Kostas Papadimitriou | var wrapError = function(onError, originalModel, options) { |
1197 | 2f834e7d | Kostas Papadimitriou | return function(model, resp) { |
1198 | 36f921a4 | Kostas Papadimitriou | var model = originalModel;
|
1199 | 8d08f18a | Kostas Papadimitriou | if (onError) {
|
1200 | 8d08f18a | Kostas Papadimitriou | onError(model, resp, options); |
1201 | 8d08f18a | Kostas Papadimitriou | } else {
|
1202 | 8d08f18a | Kostas Papadimitriou | model.trigger('error', model, resp, options);
|
1203 | 8d08f18a | Kostas Papadimitriou | } |
1204 | 8d08f18a | Kostas Papadimitriou | }; |
1205 | 8d08f18a | Kostas Papadimitriou | }; |
1206 | 8d08f18a | Kostas Papadimitriou | |
1207 | 8d08f18a | Kostas Papadimitriou | }).call(this); |