diff options
| author | Florian Staudacher <florian_staudacher@yahoo.de> | 2014-01-03 05:02:38 +0400 |
|---|---|---|
| committer | Florian Staudacher <florian_staudacher@yahoo.de> | 2014-01-17 02:23:30 +0400 |
| commit | 1924c40d38beebedd7e4bb458e1452a3c60a0f7f (patch) | |
| tree | 2a274830b40c84fbb19db82923691cd9f294e7c8 /vendor | |
| parent | 6fc5ccb9f941ba2072c865e14560299947e44384 (diff) | |
replace vendored backbone.js/underscore.js with 'backbone-on-rails' gem
- updates underscore to 1.5.2 and backbone to 1.1.0
backbone had some breaking changes:
- fix url/urlRoot handling in models & collections
- options are no longer attached to the view by default
- collections reset when 'fetch' is called, tell it to keep the existing
models
other changes:
- fix some events triggering multiple times in connection with deleting
a model
- use document fragments instead of an element array for stream entries
- adapt jasmine and cucumber specs to the changed code
* no longer test the backbone router as part of our code
* jasmine factory already returns model instances, no need to wrap
that again
Diffstat (limited to 'vendor')
| -rw-r--r-- | vendor/assets/javascripts/backbone.js | 1431 | ||||
| -rw-r--r-- | vendor/assets/javascripts/underscore.js | 999 |
2 files changed, 0 insertions, 2430 deletions
diff --git a/vendor/assets/javascripts/backbone.js b/vendor/assets/javascripts/backbone.js deleted file mode 100644 index 3373c952b..000000000 --- a/vendor/assets/javascripts/backbone.js +++ /dev/null @@ -1,1431 +0,0 @@ -// Backbone.js 0.9.2 - -// (c) 2010-2012 Jeremy Ashkenas, DocumentCloud Inc. -// Backbone may be freely distributed under the MIT license. -// For all details and documentation: -// http://backbonejs.org - -(function(){ - - // Initial Setup - // ------------- - - // Save a reference to the global object (`window` in the browser, `global` - // on the server). - var root = this; - - // Save the previous value of the `Backbone` variable, so that it can be - // restored later on, if `noConflict` is used. - var previousBackbone = root.Backbone; - - // Create a local reference to slice/splice. - var slice = Array.prototype.slice; - var splice = Array.prototype.splice; - - // The top-level namespace. All public Backbone classes and modules will - // be attached to this. Exported for both CommonJS and the browser. - var Backbone; - if (typeof exports !== 'undefined') { - Backbone = exports; - } else { - Backbone = root.Backbone = {}; - } - - // Current version of the library. Keep in sync with `package.json`. - Backbone.VERSION = '0.9.2'; - - // Require Underscore, if we're on the server, and it's not already present. - var _ = root._; - if (!_ && (typeof require !== 'undefined')) _ = require('underscore'); - - // For Backbone's purposes, jQuery, Zepto, or Ender owns the `$` variable. - var $ = root.jQuery || root.Zepto || root.ender; - - // Set the JavaScript library that will be used for DOM manipulation and - // Ajax calls (a.k.a. the `$` variable). By default Backbone will use: jQuery, - // Zepto, or Ender; but the `setDomLibrary()` method lets you inject an - // alternate JavaScript library (or a mock library for testing your views - // outside of a browser). - Backbone.setDomLibrary = function(lib) { - $ = lib; - }; - - // Runs Backbone.js in *noConflict* mode, returning the `Backbone` variable - // to its previous owner. Returns a reference to this Backbone object. - Backbone.noConflict = function() { - root.Backbone = previousBackbone; - return this; - }; - - // Turn on `emulateHTTP` to support legacy HTTP servers. Setting this option - // will fake `"PUT"` and `"DELETE"` requests via the `_method` parameter and - // set a `X-Http-Method-Override` header. - Backbone.emulateHTTP = false; - - // Turn on `emulateJSON` to support legacy servers that can't deal with direct - // `application/json` requests ... will encode the body as - // `application/x-www-form-urlencoded` instead and will send the model in a - // form param named `model`. - Backbone.emulateJSON = false; - - // Backbone.Events - // ----------------- - - // Regular expression used to split event strings - var eventSplitter = /\s+/; - - // A module that can be mixed in to *any object* in order to provide it with - // custom events. You may bind with `on` or remove with `off` callback functions - // to an event; trigger`-ing an event fires all callbacks in succession. - // - // var object = {}; - // _.extend(object, Backbone.Events); - // object.on('expand', function(){ alert('expanded'); }); - // object.trigger('expand'); - // - var Events = Backbone.Events = { - - // Bind one or more space separated events, `events`, to a `callback` - // function. Passing `"all"` will bind the callback to all events fired. - on: function(events, callback, context) { - - var calls, event, node, tail, list; - if (!callback) return this; - events = events.split(eventSplitter); - calls = this._callbacks || (this._callbacks = {}); - - // Create an immutable callback list, allowing traversal during - // modification. The tail is an empty object that will always be used - // as the next node. - while (event = events.shift()) { - list = calls[event]; - node = list ? list.tail : {}; - node.next = tail = {}; - node.context = context; - node.callback = callback; - calls[event] = {tail: tail, next: list ? list.next : node}; - } - - return this; - }, - - // Remove one or many callbacks. If `context` is null, removes all callbacks - // with that function. If `callback` is null, removes all callbacks for the - // event. If `events` is null, removes all bound callbacks for all events. - off: function(events, callback, context) { - var event, calls, node, tail, cb, ctx; - - // No events, or removing *all* events. - if (!(calls = this._callbacks)) return; - if (!(events || callback || context)) { - delete this._callbacks; - return this; - } - - // Loop through the listed events and contexts, splicing them out of the - // linked list of callbacks if appropriate. - events = events ? events.split(eventSplitter) : _.keys(calls); - while (event = events.shift()) { - node = calls[event]; - delete calls[event]; - if (!node || !(callback || context)) continue; - // Create a new list, omitting the indicated callbacks. - tail = node.tail; - while ((node = node.next) !== tail) { - cb = node.callback; - ctx = node.context; - if ((callback && cb !== callback) || (context && ctx !== context)) { - this.on(event, cb, ctx); - } - } - } - - return this; - }, - - // Trigger one or many events, firing all bound callbacks. Callbacks are - // passed the same arguments as `trigger` is, apart from the event name - // (unless you're listening on `"all"`, which will cause your callback to - // receive the true name of the event as the first argument). - trigger: function(events) { - var event, node, calls, tail, args, all, rest; - if (!(calls = this._callbacks)) return this; - all = calls.all; - events = events.split(eventSplitter); - rest = slice.call(arguments, 1); - - // For each event, walk through the linked list of callbacks twice, - // first to trigger the event, then to trigger any `"all"` callbacks. - while (event = events.shift()) { - if (node = calls[event]) { - tail = node.tail; - while ((node = node.next) !== tail) { - node.callback.apply(node.context || this, rest); - } - } - if (node = all) { - tail = node.tail; - args = [event].concat(rest); - while ((node = node.next) !== tail) { - node.callback.apply(node.context || this, args); - } - } - } - - return this; - } - - }; - - // Aliases for backwards compatibility. - Events.bind = Events.on; - Events.unbind = Events.off; - - // Backbone.Model - // -------------- - - // Create a new model, with defined attributes. A client id (`cid`) - // is automatically generated and assigned for you. - var Model = Backbone.Model = function(attributes, options) { - var defaults; - attributes || (attributes = {}); - if (options && options.parse) attributes = this.parse(attributes); - if (defaults = getValue(this, 'defaults')) { - attributes = _.extend({}, defaults, attributes); - } - if (options && options.collection) this.collection = options.collection; - this.attributes = {}; - this._escapedAttributes = {}; - this.cid = _.uniqueId('c'); - this.changed = {}; - this._silent = {}; - this._pending = {}; - this.set(attributes, {silent: true}); - // Reset change tracking. - this.changed = {}; - this._silent = {}; - this._pending = {}; - this._previousAttributes = _.clone(this.attributes); - this.initialize.apply(this, arguments); - }; - - // Attach all inheritable methods to the Model prototype. - _.extend(Model.prototype, Events, { - - // A hash of attributes whose current and previous value differ. - changed: null, - - // A hash of attributes that have silently changed since the last time - // `change` was called. Will become pending attributes on the next call. - _silent: null, - - // A hash of attributes that have changed since the last `'change'` event - // began. - _pending: null, - - // The default name for the JSON `id` attribute is `"id"`. MongoDB and - // CouchDB users may want to set this to `"_id"`. - idAttribute: 'id', - - // Initialize is an empty function by default. Override it with your own - // initialization logic. - initialize: function(){}, - - // Return a copy of the model's `attributes` object. - toJSON: function(options) { - return _.clone(this.attributes); - }, - - // Get the value of an attribute. - get: function(attr) { - return this.attributes[attr]; - }, - - // Get the HTML-escaped value of an attribute. - escape: function(attr) { - var html; - if (html = this._escapedAttributes[attr]) return html; - var val = this.get(attr); - return this._escapedAttributes[attr] = _.escape(val == null ? '' : '' + val); - }, - - // Returns `true` if the attribute contains a value that is not null - // or undefined. - has: function(attr) { - return this.get(attr) != null; - }, - - // Set a hash of model attributes on the object, firing `"change"` unless - // you choose to silence it. - set: function(key, value, options) { - var attrs, attr, val; - - // Handle both `"key", value` and `{key: value}` -style arguments. - if (_.isObject(key) || key == null) { - attrs = key; - options = value; - } else { - attrs = {}; - attrs[key] = value; - } - - // Extract attributes and options. - options || (options = {}); - if (!attrs) return this; - if (attrs instanceof Model) attrs = attrs.attributes; - if (options.unset) for (attr in attrs) attrs[attr] = void 0; - - // Run validation. - if (!this._validate(attrs, options)) return false; - - // Check for changes of `id`. - if (this.idAttribute in attrs) this.id = attrs[this.idAttribute]; - - var changes = options.changes = {}; - var now = this.attributes; - var escaped = this._escapedAttributes; - var prev = this._previousAttributes || {}; - - // For each `set` attribute... - for (attr in attrs) { - val = attrs[attr]; - - // If the new and current value differ, record the change. - if (!_.isEqual(now[attr], val) || (options.unset && _.has(now, attr))) { - delete escaped[attr]; - (options.silent ? this._silent : changes)[attr] = true; - } - - // Update or delete the current value. - options.unset ? delete now[attr] : now[attr] = val; - - // If the new and previous value differ, record the change. If not, - // then remove changes for this attribute. - if (!_.isEqual(prev[attr], val) || (_.has(now, attr) != _.has(prev, attr))) { - this.changed[attr] = val; - if (!options.silent) this._pending[attr] = true; - } else { - delete this.changed[attr]; - delete this._pending[attr]; - } - } - - // Fire the `"change"` events. - if (!options.silent) this.change(options); - return this; - }, - - // Remove an attribute from the model, firing `"change"` unless you choose - // to silence it. `unset` is a noop if the attribute doesn't exist. - unset: function(attr, options) { - (options || (options = {})).unset = true; - return this.set(attr, null, options); - }, - - // Clear all attributes on the model, firing `"change"` unless you choose - // to silence it. - clear: function(options) { - (options || (options = {})).unset = true; - return this.set(_.clone(this.attributes), options); - }, - - // Fetch the model from the server. If the server's representation of the - // model differs from its current attributes, they will be overriden, - // triggering a `"change"` event. - fetch: function(options) { - options = options ? _.clone(options) : {}; - var model = this; - var success = options.success; - options.success = function(resp, status, xhr) { - if (!model.set(model.parse(resp, xhr), options)) return false; - if (success) success(model, resp); - }; - options.error = Backbone.wrapError(options.error, model, options); - return (this.sync || Backbone.sync).call(this, 'read', this, options); - }, - - // Set a hash of model attributes, and sync the model to the server. - // If the server returns an attributes hash that differs, the model's - // state will be `set` again. - save: function(key, value, options) { - var attrs, current; - - // Handle both `("key", value)` and `({key: value})` -style calls. - if (_.isObject(key) || key == null) { - attrs = key; - options = value; - } else { - attrs = {}; - attrs[key] = value; - } - options = options ? _.clone(options) : {}; - - // If we're "wait"-ing to set changed attributes, validate early. - if (options.wait) { - if (!this._validate(attrs, options)) return false; - current = _.clone(this.attributes); - } - - // Regular saves `set` attributes before persisting to the server. - var silentOptions = _.extend({}, options, {silent: true}); - if (attrs && !this.set(attrs, options.wait ? silentOptions : options)) { - return false; - } - - // After a successful server-side save, the client is (optionally) - // updated with the server-side state. - var model = this; - var success = options.success; - options.success = function(resp, status, xhr) { - var serverAttrs = model.parse(resp, xhr); - if (options.wait) { - delete options.wait; - serverAttrs = _.extend(attrs || {}, serverAttrs); - } - if (!model.set(serverAttrs, options)) return false; - if (success) { - success(model, resp); - } else { - model.trigger('sync', model, resp, options); - } - }; - - // Finish configuring and sending the Ajax request. - options.error = Backbone.wrapError(options.error, model, options); - var method = this.isNew() ? 'create' : 'update'; - var xhr = (this.sync || Backbone.sync).call(this, method, this, options); - if (options.wait) this.set(current, silentOptions); - return xhr; - }, - - // Destroy this model on the server if it was already persisted. - // Optimistically removes the model from its collection, if it has one. - // If `wait: true` is passed, waits for the server to respond before removal. - destroy: function(options) { - options = options ? _.clone(options) : {}; - var model = this; - var success = options.success; - - var triggerDestroy = function() { - model.trigger('destroy', model, model.collection, options); - }; - - if (this.isNew()) { - triggerDestroy(); - return false; - } - - options.success = function(resp) { - if (options.wait) triggerDestroy(); - if (success) { - success(model, resp); - } else { - model.trigger('sync', model, resp, options); - } - }; - - options.error = Backbone.wrapError(options.error, model, options); - var xhr = (this.sync || Backbone.sync).call(this, 'delete', this, options); - if (!options.wait) triggerDestroy(); - return xhr; - }, - - // Default URL for the model's representation on the server -- if you're - // using Backbone's restful methods, override this to change the endpoint - // that will be called. - url: function() { - var base = getValue(this, 'urlRoot') || getValue(this.collection, 'url') || urlError(); - if (this.isNew()) return base; - return base + (base.charAt(base.length - 1) == '/' ? '' : '/') + encodeURIComponent(this.id); - }, - - // **parse** converts a response into the hash of attributes to be `set` on - // the model. The default implementation is just to pass the response along. - parse: function(resp, xhr) { - return resp; - }, - - // Create a new model with identical attributes to this one. - clone: function() { - return new this.constructor(this.attributes); - }, - - // A model is new if it has never been saved to the server, and lacks an id. - isNew: function() { - return this.id == null; - }, - - // Call this method to manually fire a `"change"` event for this model and - // a `"change:attribute"` event for each changed attribute. - // Calling this will cause all objects observing the model to update. - change: function(options) { - options || (options = {}); - var changing = this._changing; - this._changing = true; - - // Silent changes become pending changes. - for (var attr in this._silent) this._pending[attr] = true; - - // Silent changes are triggered. - var changes = _.extend({}, options.changes, this._silent); - this._silent = {}; - for (var attr in changes) { - this.trigger('change:' + attr, this, this.get(attr), options); - } - if (changing) return this; - - // Continue firing `"change"` events while there are pending changes. - while (!_.isEmpty(this._pending)) { - this._pending = {}; - this.trigger('change', this, options); - // Pending and silent changes still remain. - for (var attr in this.changed) { - if (this._pending[attr] || this._silent[attr]) continue; - delete this.changed[attr]; - } - this._previousAttributes = _.clone(this.attributes); - } - - this._changing = false; - return this; - }, - - // Determine if the model has changed since the last `"change"` event. - // If you specify an attribute name, determine if that attribute has changed. - hasChanged: function(attr) { - if (!arguments.length) return !_.isEmpty(this.changed); - return _.has(this.changed, attr); - }, - - // Return an object containing all the attributes that have changed, or - // false if there are no changed attributes. Useful for determining what - // parts of a view need to be updated and/or what attributes need to be - // persisted to the server. Unset attributes will be set to undefined. - // You can also pass an attributes object to diff against the model, - // determining if there *would be* a change. - changedAttributes: function(diff) { - if (!diff) return this.hasChanged() ? _.clone(this.changed) : false; - var val, changed = false, old = this._previousAttributes; - for (var attr in diff) { - if (_.isEqual(old[attr], (val = diff[attr]))) continue; - (changed || (changed = {}))[attr] = val; - } - return changed; - }, - - // Get the previous value of an attribute, recorded at the time the last - // `"change"` event was fired. - previous: function(attr) { - if (!arguments.length || !this._previousAttributes) return null; - return this._previousAttributes[attr]; - }, - - // Get all of the attributes of the model at the time of the previous - // `"change"` event. - previousAttributes: function() { - return _.clone(this._previousAttributes); - }, - - // Check if the model is currently in a valid state. It's only possible to - // get into an *invalid* state if you're using silent changes. - isValid: function() { - return !this.validate(this.attributes); - }, - - // Run validation against the next complete set of model attributes, - // returning `true` if all is well. If a specific `error` callback has - // been passed, call that instead of firing the general `"error"` event. - _validate: function(attrs, options) { - if (options.silent || !this.validate) return true; - attrs = _.extend({}, this.attributes, attrs); - var error = this.validate(attrs, options); - if (!error) return true; - if (options && options.error) { - options.error(this, error, options); - } else { - this.trigger('error', this, error, options); - } - return false; - } - - }); - - // Backbone.Collection - // ------------------- - - // Provides a standard collection class for our sets of models, ordered - // or unordered. If a `comparator` is specified, the Collection will maintain - // its models in sort order, as they're added and removed. - var Collection = Backbone.Collection = function(models, options) { - options || (options = {}); - if (options.model) this.model = options.model; - if (options.comparator) this.comparator = options.comparator; - this._reset(); - this.initialize.apply(this, arguments); - if (models) this.reset(models, {silent: true, parse: options.parse}); - }; - - // Define the Collection's inheritable methods. - _.extend(Collection.prototype, Events, { - - // The default model for a collection is just a **Backbone.Model**. - // This should be overridden in most cases. - model: Model, - - // Initialize is an empty function by default. Override it with your own - // initialization logic. - initialize: function(){}, - - // The JSON representation of a Collection is an array of the - // models' attributes. - toJSON: function(options) { - return this.map(function(model){ return model.toJSON(options); }); - }, - - // Add a model, or list of models to the set. Pass **silent** to avoid - // firing the `add` event for every new model. - add: function(models, options) { - var i, index, length, model, cid, id, cids = {}, ids = {}, dups = []; - options || (options = {}); - models = _.isArray(models) ? models.slice() : [models]; - - // Begin by turning bare objects into model references, and preventing - // invalid models or duplicate models from being added. - for (i = 0, length = models.length; i < length; i++) { - if (!(model = models[i] = this._prepareModel(models[i], options))) { - throw new Error("Can't add an invalid model to a collection"); - } - cid = model.cid; - id = model.id; - if (cids[cid] || this._byCid[cid] || ((id != null) && (ids[id] || this._byId[id]))) { - dups.push(i); - continue; - } - cids[cid] = ids[id] = model; - } - - // Remove duplicates. - i = dups.length; - while (i--) { - models.splice(dups[i], 1); - } - - // Listen to added models' events, and index models for lookup by - // `id` and by `cid`. - for (i = 0, length = models.length; i < length; i++) { - (model = models[i]).on('all', this._onModelEvent, this); - this._byCid[model.cid] = model; - if (model.id != null) this._byId[model.id] = model; - } - - // Insert models into the collection, re-sorting if needed, and triggering - // `add` events unless silenced. - this.length += length; - index = options.at != null ? options.at : this.models.length; - splice.apply(this.models, [index, 0].concat(models)); - if (this.comparator) this.sort({silent: true}); - if (options.silent) return this; - for (i = 0, length = this.models.length; i < length; i++) { - if (!cids[(model = this.models[i]).cid]) continue; - options.index = i; - model.trigger('add', model, this, options); - } - return this; - }, - - // Remove a model, or a list of models from the set. Pass silent to avoid - // firing the `remove` event for every model removed. - remove: function(models, options) { - var i, l, index, model; - options || (options = {}); - models = _.isArray(models) ? models.slice() : [models]; - for (i = 0, l = models.length; i < l; i++) { - model = this.getByCid(models[i]) || this.get(models[i]); - if (!model) continue; - delete this._byId[model.id]; - delete this._byCid[model.cid]; - index = this.indexOf(model); - this.models.splice(index, 1); - this.length--; - if (!options.silent) { - options.index = index; - model.trigger('remove', model, this, options); - } - this._removeReference(model); - } - return this; - }, - - // Add a model to the end of the collection. - push: function(model, options) { - model = this._prepareModel(model, options); - this.add(model, options); - return model; - }, - - // Remove a model from the end of the collection. - pop: function(options) { - var model = this.at(this.length - 1); - this.remove(model, options); - return model; - }, - - // Add a model to the beginning of the collection. - unshift: function(model, options) { - model = this._prepareModel(model, options); - this.add(model, _.extend({at: 0}, options)); - return model; - }, - - // Remove a model from the beginning of the collection. - shift: function(options) { - var model = this.at(0); - this.remove(model, options); - return model; - }, - - // Get a model from the set by id. - get: function(id) { - if (id == null) return void 0; - return this._byId[id.id != null ? id.id : id]; - }, - - // Get a model from the set by client id. - getByCid: function(cid) { - return cid && this._byCid[cid.cid || cid]; - }, - - // Get the model at the given index. - at: function(index) { - return this.models[index]; - }, - - // Return models with matching attributes. Useful for simple cases of `filter`. - where: function(attrs) { - if (_.isEmpty(attrs)) return []; - return this.filter(function(model) { - for (var key in attrs) { - if (attrs[key] !== model.get(key)) return false; - } - return true; - }); - }, - - // Force the collection to re-sort itself. You don't need to call this under - // normal circumstances, as the set will maintain sort order as each item - // is added. - sort: function(options) { - options || (options = {}); - if (!this.comparator) throw new Error('Cannot sort a set without a comparator'); - var boundComparator = _.bind(this.comparator, this); - if (this.comparator.length == 1) { - this.models = this.sortBy(boundComparator); - } else { - this.models.sort(boundComparator); - } - if (!options.silent) this.trigger('reset', this, options); - return this; - }, - - // Pluck an attribute from each model in the collection. - pluck: function(attr) { - return _.map(this.models, function(model){ return model.get(attr); }); - }, - - // When you have more items than you want to add or remove individually, - // you can reset the entire set with a new list of models, without firing - // any `add` or `remove` events. Fires `reset` when finished. - reset: function(models, options) { - models || (models = []); - options || (options = {}); - for (var i = 0, l = this.models.length; i < l; i++) { - this._removeReference(this.models[i]); - } - this._reset(); - this.add(models, _.extend({silent: true}, options)); - if (!options.silent) this.trigger('reset', this, options); - return this; - }, - - // Fetch the default set of models for this collection, resetting the - // collection when they arrive. If `add: true` is passed, appends the - // models to the collection instead of resetting. - fetch: function(options) { - options = options ? _.clone(options) : {}; - if (options.parse === undefined) options.parse = true; - var collection = this; - var success = options.success; - options.success = function(resp, status, xhr) { - collection[options.add ? 'add' : 'reset'](collection.parse(resp, xhr), options); - if (success) success(collection, resp); - }; - options.error = Backbone.wrapError(options.error, collection, options); - return (this.sync || Backbone.sync).call(this, 'read', this, options); - }, - - // Create a new instance of a model in this collection. Add the model to the - // collection immediately, unless `wait: true` is passed, in which case we - // wait for the server to agree. - create: function(model, options) { - var coll = this; - options = options ? _.clone(options) : {}; - model = this._prepareModel(model, options); - if (!model) return false; - if (!options.wait) coll.add(model, options); - var success = options.success; - options.success = function(nextModel, resp, xhr) { - if (options.wait) coll.add(nextModel, options); - if (success) { - success(nextModel, resp); - } else { - nextModel.trigger('sync', model, resp, options); - } - }; - model.save(null, options); - return model; - }, - - // **parse** converts a response into a list of models to be added to the - // collection. The default implementation is just to pass it through. - parse: function(resp, xhr) { - return resp; - }, - - // Proxy to _'s chain. Can't be proxied the same way the rest of the - // underscore methods are proxied because it relies on the underscore - // constructor. - chain: function () { - return _(this.models).chain(); - }, - - // Reset all internal state. Called when the collection is reset. - _reset: function(options) { - this.length = 0; - this.models = []; - this._byId = {}; - this._byCid = {}; - }, - - // Prepare a model or hash of attributes to be added to this collection. - _prepareModel: function(model, options) { - options || (options = {}); - if (!(model instanceof Model)) { - var attrs = model; - options.collection = this; - model = new this.model(attrs, options); - if (!model._validate(model.attributes, options)) model = false; - } else if (!model.collection) { - model.collection = this; - } - return model; - }, - - // Internal method to remove a model's ties to a collection. - _removeReference: function(model) { - if (this == model.collection) { - delete model.collection; - } - model.off('all', this._onModelEvent, this); - }, - - // Internal method called every time a model in the set fires an event. - // Sets need to update their indexes when models change ids. All other - // events simply proxy through. "add" and "remove" events that originate - // in other collections are ignored. - _onModelEvent: function(event, model, collection, options) { - if ((event == 'add' || event == 'remove') && collection != this) return; - if (event == 'destroy') { - this.remove(model, options); - } - if (model && event === 'change:' + model.idAttribute) { - delete this._byId[model.previous(model.idAttribute)]; - this._byId[model.id] = model; - } - this.trigger.apply(this, arguments); - } - - }); - - // Underscore methods that we want to implement on the Collection. - var methods = ['forEach', 'each', 'map', 'reduce', 'reduceRight', 'find', - 'detect', 'filter', 'select', 'reject', 'every', 'all', 'some', 'any', - 'include', 'contains', 'invoke', 'max', 'min', 'sortBy', 'sortedIndex', - 'toArray', 'size', 'first', 'initial', 'rest', 'last', 'without', 'indexOf', - 'shuffle', 'lastIndexOf', 'isEmpty', 'groupBy']; - - // Mix in each Underscore method as a proxy to `Collection#models`. - _.each(methods, function(method) { - Collection.prototype[method] = function() { - return _[method].apply(_, [this.models].concat(_.toArray(arguments))); - }; - }); - - // Backbone.Router - // ------------------- - - // Routers map faux-URLs to actions, and fire events when routes are - // matched. Creating a new one sets its `routes` hash, if not set statically. - var Router = Backbone.Router = function(options) { - options || (options = {}); - if (options.routes) this.routes = options.routes; - this._bindRoutes(); - this.initialize.apply(this, arguments); - }; - - // Cached regular expressions for matching named param parts and splatted - // parts of route strings. - var namedParam = /:\w+/g; - var splatParam = /\*\w+/g; - var escapeRegExp = /[-[\]{}()+?.,\\^$|#\s]/g; - - // Set up all inheritable **Backbone.Router** properties and methods. - _.extend(Router.prototype, Events, { - - // Initialize is an empty function by default. Override it with your own - // initialization logic. - initialize: function(){}, - - // Manually bind a single named route to a callback. For example: - // - // this.route('search/:query/p:num', 'search', function(query, num) { - // ... - // }); - // - route: function(route, name, callback) { - Backbone.history || (Backbone.history = new History); - if (!_.isRegExp(route)) route = this._routeToRegExp(route); - if (!callback) callback = this[name]; - Backbone.history.route(route, _.bind(function(fragment) { - var args = this._extractParameters(route, fragment); - callback && callback.apply(this, args); - this.trigger.apply(this, ['route:' + name].concat(args)); - Backbone.history.trigger('route', this, name, args); - }, this)); - return this; - }, - - // Simple proxy to `Backbone.history` to save a fragment into the history. - navigate: function(fragment, options) { - Backbone.history.navigate(fragment, options); - }, - - // Bind all defined routes to `Backbone.history`. We have to reverse the - // order of the routes here to support behavior where the most general - // routes can be defined at the bottom of the route map. - _bindRoutes: function() { - if (!this.routes) return; - var routes = []; - for (var route in this.routes) { - routes.unshift([route, this.routes[route]]); - } - for (var i = 0, l = routes.length; i < l; i++) { - this.route(routes[i][0], routes[i][1], this[routes[i][1]]); - } - }, - - // Convert a route string into a regular expression, suitable for matching - // against the current location hash. - _routeToRegExp: function(route) { - route = route.replace(escapeRegExp, '\\$&') - .replace(namedParam, '([^\/]+)') - .replace(splatParam, '(.*?)'); - return new RegExp('^' + route + '$'); - }, - - // Given a route, and a URL fragment that it matches, return the array of - // extracted parameters. - _extractParameters: function(route, fragment) { - return route.exec(fragment).slice(1); - } - - }); - - // Backbone.History - // ---------------- - - // Handles cross-browser history management, based on URL fragments. If the - // browser does not support `onhashchange`, falls back to polling. - var History = Backbone.History = function() { - this.handlers = []; - _.bindAll(this, 'checkUrl'); - }; - - // Cached regex for cleaning leading hashes and slashes . - var routeStripper = /^[#\/]/; - - // Cached regex for detecting MSIE. - var isExplorer = /msie [\w.]+/; - - // Has the history handling already been started? - History.started = false; - - // Set up all inheritable **Backbone.History** properties and methods. - _.extend(History.prototype, Events, { - - // The default interval to poll for hash changes, if necessary, is - // twenty times a second. - interval: 50, - - // Gets the true hash value. Cannot use location.hash directly due to bug - // in Firefox where location.hash will always be decoded. - getHash: function(windowOverride) { - var loc = windowOverride ? windowOverride.location : window.location; - var match = loc.href.match(/#(.*)$/); - return match ? match[1] : ''; - }, - - // Get the cross-browser normalized URL fragment, either from the URL, - // the hash, or the override. - getFragment: function(fragment, forcePushState) { - if (fragment == null) { - if (this._hasPushState || forcePushState) { - fragment = window.location.pathname; - var search = window.location.search; - if (search) fragment += search; - } else { - fragment = this.getHash(); - } - } - if (!fragment.indexOf(this.options.root)) fragment = fragment.substr(this.options.root.length); - return fragment.replace(routeStripper, ''); - }, - - // Start the hash change handling, returning `true` if the current URL matches - // an existing route, and `false` otherwise. - start: function(options) { - if (History.started) throw new Error("Backbone.history has already been started"); - History.started = true; - - // Figure out the initial configuration. Do we need an iframe? - // Is pushState desired ... is it available? - this.options = _.extend({}, {root: '/'}, this.options, options); - this._wantsHashChange = this.options.hashChange !== false; - this._wantsPushState = !!this.options.pushState; - this._hasPushState = !!(this.options.pushState && window.history && window.history.pushState); - var fragment = this.getFragment(); - var docMode = document.documentMode; - var oldIE = (isExplorer.exec(navigator.userAgent.toLowerCase()) && (!docMode || docMode <= 7)); - - if (oldIE) { - this.iframe = $('<iframe src="javascript:0" tabindex="-1" />').hide().appendTo('body')[0].contentWindow; - this.navigate(fragment); - } - - // Depending on whether we're using pushState or hashes, and whether - // 'onhashchange' is supported, determine how we check the URL state. - if (this._hasPushState) { - $(window).bind('popstate', this.checkUrl); - } else if (this._wantsHashChange && ('onhashchange' in window) && !oldIE) { - $(window).bind('hashchange', this.checkUrl); - } else if (this._wantsHashChange) { - this._checkUrlInterval = setInterval(this.checkUrl, this.interval); - } - - // Determine if we need to change the base url, for a pushState link - // opened by a non-pushState browser. - this.fragment = fragment; - var loc = window.location; - var atRoot = loc.pathname == this.options.root; - - // If we've started off with a route from a `pushState`-enabled browser, - // but we're currently in a browser that doesn't support it... - if (this._wantsHashChange && this._wantsPushState && !this._hasPushState && !atRoot) { - this.fragment = this.getFragment(null, true); - window.location.replace(this.options.root + '#' + this.fragment); - // Return immediately as browser will do redirect to new url - return true; - - // Or if we've started out with a hash-based route, but we're currently - // in a browser where it could be `pushState`-based instead... - } else if (this._wantsPushState && this._hasPushState && atRoot && loc.hash) { - this.fragment = this.getHash().replace(routeStripper, ''); - window.history.replaceState({}, document.title, loc.protocol + '//' + loc.host + this.options.root + this.fragment); - } - - if (!this.options.silent) { - return this.loadUrl(); - } - }, - - // Disable Backbone.history, perhaps temporarily. Not useful in a real app, - // but possibly useful for unit testing Routers. - stop: function() { - $(window).unbind('popstate', this.checkUrl).unbind('hashchange', this.checkUrl); - clearInterval(this._checkUrlInterval); - History.started = false; - }, - - // Add a route to be tested when the fragment changes. Routes added later - // may override previous routes. - route: function(route, callback) { - this.handlers.unshift({route: route, callback: callback}); - }, - - // Checks the current URL to see if it has changed, and if it has, - // calls `loadUrl`, normalizing across the hidden iframe. - checkUrl: function(e) { - var current = this.getFragment(); - if (current == this.fragment && this.iframe) current = this.getFragment(this.getHash(this.iframe)); - if (current == this.fragment) return false; - if (this.iframe) this.navigate(current); - this.loadUrl() || this.loadUrl(this.getHash()); - }, - - // Attempt to load the current URL fragment. If a route succeeds with a - // match, returns `true`. If no defined routes matches the fragment, - // returns `false`. - loadUrl: function(fragmentOverride) { - var fragment = this.fragment = this.getFragment(fragmentOverride); - var matched = _.any(this.handlers, function(handler) { - if (handler.route.test(fragment)) { - handler.callback(fragment); - return true; - } - }); - return matched; - }, - - // Save a fragment into the hash history, or replace the URL state if the - // 'replace' option is passed. You are responsible for properly URL-encoding - // the fragment in advance. - // - // The options object can contain `trigger: true` if you wish to have the - // route callback be fired (not usually desirable), or `replace: true`, if - // you wish to modify the current URL without adding an entry to the history. - navigate: function(fragment, options) { - if (!History.started) return false; - if (!options || options === true) options = {trigger: options}; - var frag = (fragment || '').replace(routeStripper, ''); - if (this.fragment == frag) return; - - // If pushState is available, we use it to set the fragment as a real URL. - if (this._hasPushState) { - if (frag.indexOf(this.options.root) != 0) frag = this.options.root + frag; - this.fragment = frag; - window.history[options.replace ? 'replaceState' : 'pushState']({}, document.title, frag); - - // If hash changes haven't been explicitly disabled, update the hash - // fragment to store history. - } else if (this._wantsHashChange) { - this.fragment = frag; - this._updateHash(window.location, frag, options.replace); - if (this.iframe && (frag != this.getFragment(this.getHash(this.iframe)))) { - // Opening and closing the iframe tricks IE7 and earlier to push a history entry on hash-tag change. - // When replace is true, we don't want this. - if(!options.replace) this.iframe.document.open().close(); - this._updateHash(this.iframe.location, frag, options.replace); - } - - // If you've told us that you explicitly don't want fallback hashchange- - // based history, then `navigate` becomes a page refresh. - } else { - window.location.assign(this.options.root + fragment); - } - if (options.trigger) this.loadUrl(fragment); - }, - - // Update the hash location, either replacing the current entry, or adding - // a new one to the browser history. - _updateHash: function(location, fragment, replace) { - if (replace) { - location.replace(location.toString().replace(/(javascript:|#).*$/, '') + '#' + fragment); - } else { - location.hash = fragment; - } - } - }); - - // Backbone.View - // ------------- - - // Creating a Backbone.View creates its initial element outside of the DOM, - // if an existing element is not provided... - var View = Backbone.View = function(options) { - this.cid = _.uniqueId('view'); - this._configure(options || {}); - this._ensureElement(); - this.initialize.apply(this, arguments); - this.delegateEvents(); - }; - - // Cached regex to split keys for `delegate`. - var delegateEventSplitter = /^(\S+)\s*(.*)$/; - - // List of view options to be merged as properties. - var viewOptions = ['model', 'collection', 'el', 'id', 'attributes', 'className', 'tagName']; - - // Set up all inheritable **Backbone.View** properties and methods. - _.extend(View.prototype, Events, { - - // The default `tagName` of a View's element is `"div"`. - tagName: 'div', - - // jQuery delegate for element lookup, scoped to DOM elements within the - // current view. This should be prefered to global lookups where possible. - $: function(selector) { - return this.$el.find(selector); - }, - - // Initialize is an empty function by default. Override it with your own - // initialization logic. - initialize: function(){}, - - // **render** is the core function that your view should override, in order - // to populate its element (`this.el`), with the appropriate HTML. The - // convention is for **render** to always return `this`. - render: function() { - return this; - }, - - // Remove this view from the DOM. Note that the view isn't present in the - // DOM by default, so calling this method may be a no-op. - remove: function() { - this.$el.remove(); - return this; - }, - - // For small amounts of DOM Elements, where a full-blown template isn't - // needed, use **make** to manufacture elements, one at a time. - // - // var el = this.make('li', {'class': 'row'}, this.model.escape('title')); - // - make: function(tagName, attributes, content) { - var el = document.createElement(tagName); - if (attributes) $(el).attr(attributes); - if (content) $(el).html(content); - return el; - }, - - // Change the view's element (`this.el` property), including event - // re-delegation. - setElement: function(element, delegate) { - if (this.$el) this.undelegateEvents(); - this.$el = (element instanceof $) ? element : $(element); - this.el = this.$el[0]; - if (delegate !== false) this.delegateEvents(); - return this; - }, - - // Set callbacks, where `this.events` is a hash of - // - // *{"event selector": "callback"}* - // - // { - // 'mousedown .title': 'edit', - // 'click .button': 'save' - // 'click .open': function(e) { ... } - // } - // - // pairs. Callbacks will be bound to the view, with `this` set properly. - // Uses event delegation for efficiency. - // Omitting the selector binds the event to `this.el`. - // This only works for delegate-able events: not `focus`, `blur`, and - // not `change`, `submit`, and `reset` in Internet Explorer. - delegateEvents: function(events) { - if (!(events || (events = getValue(this, 'events')))) return; - this.undelegateEvents(); - for (var key in events) { - var method = events[key]; - if (!_.isFunction(method)) method = this[events[key]]; - if (!method) throw new Error('Method "' + events[key] + '" does not exist'); - var match = key.match(delegateEventSplitter); - var eventName = match[1], selector = match[2]; - method = _.bind(method, this); - eventName += '.delegateEvents' + this.cid; - if (selector === '') { - this.$el.bind(eventName, method); - } else { - this.$el.delegate(selector, eventName, method); - } - } - }, - - // Clears all callbacks previously bound to the view with `delegateEvents`. - // You usually don't need to use this, but may wish to if you have multiple - // Backbone views attached to the same DOM element. - undelegateEvents: function() { - this.$el.unbind('.delegateEvents' + this.cid); - }, - - // Performs the initial configuration of a View with a set of options. - // Keys with special meaning *(model, collection, id, className)*, are - // attached directly to the view. - _configure: function(options) { - if (this.options) options = _.extend({}, this.options, options); - for (var i = 0, l = viewOptions.length; i < l; i++) { - var attr = viewOptions[i]; - if (options[attr]) this[attr] = options[attr]; - } - this.options = options; - }, - - // Ensure that the View has a DOM element to render into. - // If `this.el` is a string, pass it through `$()`, take the first - // matching element, and re-assign it to `el`. Otherwise, create - // an element from the `id`, `className` and `tagName` properties. - _ensureElement: function() { - if (!this.el) { - var attrs = getValue(this, 'attributes') || {}; - if (this.id) attrs.id = this.id; - if (this.className) attrs['class'] = this.className; - this.setElement(this.make(this.tagName, attrs), false); - } else { - this.setElement(this.el, false); - } - } - - }); - - // The self-propagating extend function that Backbone classes use. - var extend = function (protoProps, classProps) { - var child = inherits(this, protoProps, classProps); - child.extend = this.extend; - return child; - }; - - // Set up inheritance for the model, collection, and view. - Model.extend = Collection.extend = Router.extend = View.extend = extend; - - // Backbone.sync - // ------------- - - // Map from CRUD to HTTP for our default `Backbone.sync` implementation. - var methodMap = { - 'create': 'POST', - 'update': 'PUT', - 'delete': 'DELETE', - 'read': 'GET' - }; - - // Override this function to change the manner in which Backbone persists - // models to the server. You will be passed the type of request, and the - // model in question. By default, makes a RESTful Ajax request - // to the model's `url()`. Some possible customizations could be: - // - // * Use `setTimeout` to batch rapid-fire updates into a single request. - // * Send up the models as XML instead of JSON. - // * Persist models via WebSockets instead of Ajax. - // - // Turn on `Backbone.emulateHTTP` in order to send `PUT` and `DELETE` requests - // as `POST`, with a `_method` parameter containing the true HTTP method, - // as well as all requests with the body as `application/x-www-form-urlencoded` - // instead of `application/json` with the model in a param named `model`. - // Useful when interfacing with server-side languages like **PHP** that make - // it difficult to read the body of `PUT` requests. - Backbone.sync = function(method, model, options) { - var type = methodMap[method]; - - // Default options, unless specified. - options || (options = {}); - - // Default JSON-request options. - var params = {type: type, dataType: 'json'}; - - // Ensure that we have a URL. - if (!options.url) { - params.url = getValue(model, 'url') || urlError(); - } - - // Ensure that we have the appropriate request data. - if (!options.data && model && (method == 'create' || method == 'update')) { - params.contentType = 'application/json'; - params.data = JSON.stringify(model.toJSON()); - } - - // For older servers, emulate JSON by encoding the request into an HTML-form. - if (Backbone.emulateJSON) { - params.contentType = 'application/x-www-form-urlencoded'; - params.data = params.data ? {model: params.data} : {}; - } - - // For older servers, emulate HTTP by mimicking the HTTP method with `_method` - // And an `X-HTTP-Method-Override` header. - if (Backbone.emulateHTTP) { - if (type === 'PUT' || type === 'DELETE') { - if (Backbone.emulateJSON) params.data._method = type; - params.type = 'POST'; - params.beforeSend = function(xhr) { - xhr.setRequestHeader('X-HTTP-Method-Override', type); - }; - } - } - - // Don't process data on a non-GET request. - if (params.type !== 'GET' && !Backbone.emulateJSON) { - params.processData = false; - } - - // Make the request, allowing the user to override any Ajax options. - return $.ajax(_.extend(params, options)); - }; - - // Wrap an optional error callback with a fallback error event. - Backbone.wrapError = function(onError, originalModel, options) { - return function(model, resp) { - resp = model === originalModel ? resp : model; - if (onError) { - onError(originalModel, resp, options); - } else { - originalModel.trigger('error', originalModel, resp, options); - } - }; - }; - - // Helpers - // ------- - - // Shared empty constructor function to aid in prototype-chain creation. - var ctor = function(){}; - - // Helper function to correctly set up the prototype chain, for subclasses. - // Similar to `goog.inherits`, but uses a hash of prototype properties and - // class properties to be extended. - var inherits = function(parent, protoProps, staticProps) { - var child; - - // The constructor function for the new subclass is either defined by you - // (the "constructor" property in your `extend` definition), or defaulted - // by us to simply call the parent's constructor. - if (protoProps && protoProps.hasOwnProperty('constructor')) { - child = protoProps.constructor; - } else { - child = function(){ parent.apply(this, arguments); }; - } - - // Inherit class (static) properties from parent. - _.extend(child, parent); - - // Set the prototype chain to inherit from `parent`, without calling - // `parent`'s constructor function. - ctor.prototype = parent.prototype; - child.prototype = new ctor(); - - // Add prototype properties (instance properties) to the subclass, - // if supplied. - if (protoProps) _.extend(child.prototype, protoProps); - - // Add static properties to the constructor function, if supplied. - if (staticProps) _.extend(child, staticProps); - - // Correctly set child's `prototype.constructor`. - child.prototype.constructor = child; - - // Set a convenience property in case the parent's prototype is needed later. - child.__super__ = parent.prototype; - - return child; - }; - - // Helper function to get a value from a Backbone object as a property - // or as a function. - var getValue = function(object, prop) { - if (!(object && object[prop])) return null; - return _.isFunction(object[prop]) ? object[prop]() : object[prop]; - }; - - // Throw an error when a URL is needed, and none is supplied. - var urlError = function() { - throw new Error('A "url" property or function must be specified'); - }; - -}).call(this); diff --git a/vendor/assets/javascripts/underscore.js b/vendor/assets/javascripts/underscore.js deleted file mode 100644 index 208d4cd89..000000000 --- a/vendor/assets/javascripts/underscore.js +++ /dev/null @@ -1,999 +0,0 @@ -// Underscore.js 1.3.1 -// (c) 2009-2012 Jeremy Ashkenas, DocumentCloud Inc. -// Underscore is freely distributable under the MIT license. -// Portions of Underscore are inspired or borrowed from Prototype, -// Oliver Steele's Functional, and John Resig's Micro-Templating. -// For all details and documentation: -// http://documentcloud.github.com/underscore - -(function() { - - // Baseline setup - // -------------- - - // Establish the root object, `window` in the browser, or `global` on the server. - var root = this; - - // Save the previous value of the `_` variable. - var previousUnderscore = root._; - - // Establish the object that gets returned to break out of a loop iteration. - var breaker = {}; - - // Save bytes in the minified (but not gzipped) version: - var ArrayProto = Array.prototype, ObjProto = Object.prototype, FuncProto = Function.prototype; - - // Create quick reference variables for speed access to core prototypes. - var slice = ArrayProto.slice, - unshift = ArrayProto.unshift, - toString = ObjProto.toString, - hasOwnProperty = ObjProto.hasOwnProperty; - - // All **ECMAScript 5** native function implementations that we hope to use - // are declared here. - var - nativeForEach = ArrayProto.forEach, - nativeMap = ArrayProto.map, - nativeReduce = ArrayProto.reduce, - nativeReduceRight = ArrayProto.reduceRight, - nativeFilter = ArrayProto.filter, - nativeEvery = ArrayProto.every, - nativeSome = ArrayProto.some, - nativeIndexOf = ArrayProto.indexOf, - nativeLastIndexOf = ArrayProto.lastIndexOf, - nativeIsArray = Array.isArray, - nativeKeys = Object.keys, - nativeBind = FuncProto.bind; - - // Create a safe reference to the Underscore object for use below. - var _ = function(obj) { return new wrapper(obj); }; - - // Export the Underscore object for **Node.js**, with - // backwards-compatibility for the old `require()` API. If we're in - // the browser, add `_` as a global object via a string identifier, - // for Closure Compiler "advanced" mode. - if (typeof exports !== 'undefined') { - if (typeof module !== 'undefined' && module.exports) { - exports = module.exports = _; - } - exports._ = _; - } else { - root['_'] = _; - } - - // Current version. - _.VERSION = '1.3.1'; - - // Collection Functions - // -------------------- - - // The cornerstone, an `each` implementation, aka `forEach`. - // Handles objects with the built-in `forEach`, arrays, and raw objects. - // Delegates to **ECMAScript 5**'s native `forEach` if available. - var each = _.each = _.forEach = function(obj, iterator, context) { - if (obj == null) return; - if (nativeForEach && obj.forEach === nativeForEach) { - obj.forEach(iterator, context); - } else if (obj.length === +obj.length) { - for (var i = 0, l = obj.length; i < l; i++) { - if (i in obj && iterator.call(context, obj[i], i, obj) === breaker) return; - } - } else { - for (var key in obj) { - if (_.has(obj, key)) { - if (iterator.call(context, obj[key], key, obj) === breaker) return; - } - } - } - }; - - // Return the results of applying the iterator to each element. - // Delegates to **ECMAScript 5**'s native `map` if available. - _.map = _.collect = function(obj, iterator, context) { - var results = []; - if (obj == null) return results; - if (nativeMap && obj.map === nativeMap) return obj.map(iterator, context); - each(obj, function(value, index, list) { - results[results.length] = iterator.call(context, value, index, list); - }); - if (obj.length === +obj.length) results.length = obj.length; - return results; - }; - - // **Reduce** builds up a single result from a list of values, aka `inject`, - // or `foldl`. Delegates to **ECMAScript 5**'s native `reduce` if available. - _.reduce = _.foldl = _.inject = function(obj, iterator, memo, context) { - var initial = arguments.length > 2; - if (obj == null) obj = []; - if (nativeReduce && obj.reduce === nativeReduce) { - if (context) iterator = _.bind(iterator, context); - return initial ? obj.reduce(iterator, memo) : obj.reduce(iterator); - } - each(obj, function(value, index, list) { - if (!initial) { - memo = value; - initial = true; - } else { - memo = iterator.call(context, memo, value, index, list); - } - }); - if (!initial) throw new TypeError('Reduce of empty array with no initial value'); - return memo; - }; - - // The right-associative version of reduce, also known as `foldr`. - // Delegates to **ECMAScript 5**'s native `reduceRight` if available. - _.reduceRight = _.foldr = function(obj, iterator, memo, context) { - var initial = arguments.length > 2; - if (obj == null) obj = []; - if (nativeReduceRight && obj.reduceRight === nativeReduceRight) { - if (context) iterator = _.bind(iterator, context); - return initial ? obj.reduceRight(iterator, memo) : obj.reduceRight(iterator); - } - var reversed = _.toArray(obj).reverse(); - if (context && !initial) iterator = _.bind(iterator, context); - return initial ? _.reduce(reversed, iterator, memo, context) : _.reduce(reversed, iterator); - }; - - // Return the first value which passes a truth test. Aliased as `detect`. - _.find = _.detect = function(obj, iterator, context) { - var result; - any(obj, function(value, index, list) { - if (iterator.call(context, value, index, list)) { - result = value; - return true; - } - }); - return result; - }; - - // Return all the elements that pass a truth test. - // Delegates to **ECMAScript 5**'s native `filter` if available. - // Aliased as `select`. - _.filter = _.select = function(obj, iterator, context) { - var results = []; - if (obj == null) return results; - if (nativeFilter && obj.filter === nativeFilter) return obj.filter(iterator, context); - each(obj, function(value, index, list) { - if (iterator.call(context, value, index, list)) results[results.length] = value; - }); - return results; - }; - - // Return all the elements for which a truth test fails. - _.reject = function(obj, iterator, context) { - var results = []; - if (obj == null) return results; - each(obj, function(value, index, list) { - if (!iterator.call(context, value, index, list)) results[results.length] = value; - }); - return results; - }; - - // Determine whether all of the elements match a truth test. - // Delegates to **ECMAScript 5**'s native `every` if available. - // Aliased as `all`. - _.every = _.all = function(obj, iterator, context) { - var result = true; - if (obj == null) return result; - if (nativeEvery && obj.every === nativeEvery) return obj.every(iterator, context); - each(obj, function(value, index, list) { - if (!(result = result && iterator.call(context, value, index, list))) return breaker; - }); - return result; - }; - - // Determine if at least one element in the object matches a truth test. - // Delegates to **ECMAScript 5**'s native `some` if available. - // Aliased as `any`. - var any = _.some = _.any = function(obj, iterator, context) { - iterator || (iterator = _.identity); - var result = false; - if (obj == null) return result; - if (nativeSome && obj.some === nativeSome) return obj.some(iterator, context); - each(obj, function(value, index, list) { - if (result || (result = iterator.call(context, value, index, list))) return breaker; - }); - return !!result; - }; - - // Determine if a given value is included in the array or object using `===`. - // Aliased as `contains`. - _.include = _.contains = function(obj, target) { - var found = false; - if (obj == null) return found; - if (nativeIndexOf && obj.indexOf === nativeIndexOf) return obj.indexOf(target) != -1; - found = any(obj, function(value) { - return value === target; - }); - return found; - }; - - // Invoke a method (with arguments) on every item in a collection. - _.invoke = function(obj, method) { - var args = slice.call(arguments, 2); - return _.map(obj, function(value) { - return (_.isFunction(method) ? method || value : value[method]).apply(value, args); - }); - }; - - // Convenience version of a common use case of `map`: fetching a property. - _.pluck = function(obj, key) { - return _.map(obj, function(value){ return value[key]; }); - }; - - // Return the maximum element or (element-based computation). - _.max = function(obj, iterator, context) { - if (!iterator && _.isArray(obj)) return Math.max.apply(Math, obj); - if (!iterator && _.isEmpty(obj)) return -Infinity; - var result = {computed : -Infinity}; - each(obj, function(value, index, list) { - var computed = iterator ? iterator.call(context, value, index, list) : value; - computed >= result.computed && (result = {value : value, computed : computed}); - }); - return result.value; - }; - - // Return the minimum element (or element-based computation). - _.min = function(obj, iterator, context) { - if (!iterator && _.isArray(obj)) return Math.min.apply(Math, obj); - if (!iterator && _.isEmpty(obj)) return Infinity; - var result = {computed : Infinity}; - each(obj, function(value, index, list) { - var computed = iterator ? iterator.call(context, value, index, list) : value; - computed < result.computed && (result = {value : value, computed : computed}); - }); - return result.value; - }; - - // Shuffle an array. - _.shuffle = function(obj) { - var shuffled = [], rand; - each(obj, function(value, index, list) { - if (index == 0) { - shuffled[0] = value; - } else { - rand = Math.floor(Math.random() * (index + 1)); - shuffled[index] = shuffled[rand]; - shuffled[rand] = value; - } - }); - return shuffled; - }; - - // Sort the object's values by a criterion produced by an iterator. - _.sortBy = function(obj, iterator, context) { - return _.pluck(_.map(obj, function(value, index, list) { - return { - value : value, - criteria : iterator.call(context, value, index, list) - }; - }).sort(function(left, right) { - var a = left.criteria, b = right.criteria; - return a < b ? -1 : a > b ? 1 : 0; - }), 'value'); - }; - - // Groups the object's values by a criterion. Pass either a string attribute - // to group by, or a function that returns the criterion. - _.groupBy = function(obj, val) { - var result = {}; - var iterator = _.isFunction(val) ? val : function(obj) { return obj[val]; }; - each(obj, function(value, index) { - var key = iterator(value, index); - (result[key] || (result[key] = [])).push(value); - }); - return result; - }; - - // Use a comparator function to figure out at what index an object should - // be inserted so as to maintain order. Uses binary search. - _.sortedIndex = function(array, obj, iterator) { - iterator || (iterator = _.identity); - var low = 0, high = array.length; - while (low < high) { - var mid = (low + high) >> 1; - iterator(array[mid]) < iterator(obj) ? low = mid + 1 : high = mid; - } - return low; - }; - - // Safely convert anything iterable into a real, live array. - _.toArray = function(iterable) { - if (!iterable) return []; - if (iterable.toArray) return iterable.toArray(); - if (_.isArray(iterable)) return slice.call(iterable); - if (_.isArguments(iterable)) return slice.call(iterable); - return _.values(iterable); - }; - - // Return the number of elements in an object. - _.size = function(obj) { - return _.toArray(obj).length; - }; - - // Array Functions - // --------------- - - // Get the first element of an array. Passing **n** will return the first N - // values in the array. Aliased as `head`. The **guard** check allows it to work - // with `_.map`. - _.first = _.head = function(array, n, guard) { - return (n != null) && !guard ? slice.call(array, 0, n) : array[0]; - }; - - // Returns everything but the last entry of the array. Especcialy useful on - // the arguments object. Passing **n** will return all the values in - // the array, excluding the last N. The **guard** check allows it to work with - // `_.map`. - _.initial = function(array, n, guard) { - return slice.call(array, 0, array.length - ((n == null) || guard ? 1 : n)); - }; - - // Get the last element of an array. Passing **n** will return the last N - // values in the array. The **guard** check allows it to work with `_.map`. - _.last = function(array, n, guard) { - if ((n != null) && !guard) { - return slice.call(array, Math.max(array.length - n, 0)); - } else { - return array[array.length - 1]; - } - }; - - // Returns everything but the first entry of the array. Aliased as `tail`. - // Especially useful on the arguments object. Passing an **index** will return - // the rest of the values in the array from that index onward. The **guard** - // check allows it to work with `_.map`. - _.rest = _.tail = function(array, index, guard) { - return slice.call(array, (index == null) || guard ? 1 : index); - }; - - // Trim out all falsy values from an array. - _.compact = function(array) { - return _.filter(array, function(value){ return !!value; }); - }; - - // Return a completely flattened version of an array. - _.flatten = function(array, shallow) { - return _.reduce(array, function(memo, value) { - if (_.isArray(value)) return memo.concat(shallow ? value : _.flatten(value)); - memo[memo.length] = value; - return memo; - }, []); - }; - - // Return a version of the array that does not contain the specified value(s). - _.without = function(array) { - return _.difference(array, slice.call(arguments, 1)); - }; - - // Produce a duplicate-free version of the array. If the array has already - // been sorted, you have the option of using a faster algorithm. - // Aliased as `unique`. - _.uniq = _.unique = function(array, isSorted, iterator) { - var initial = iterator ? _.map(array, iterator) : array; - var result = []; - _.reduce(initial, function(memo, el, i) { - if (0 == i || (isSorted === true ? _.last(memo) != el : !_.include(memo, el))) { - memo[memo.length] = el; - result[result.length] = array[i]; - } - return memo; - }, []); - return result; - }; - - // Produce an array that contains the union: each distinct element from all of - // the passed-in arrays. - _.union = function() { - return _.uniq(_.flatten(arguments, true)); - }; - - // Produce an array that contains every item shared between all the - // passed-in arrays. (Aliased as "intersect" for back-compat.) - _.intersection = _.intersect = function(array) { - var rest = slice.call(arguments, 1); - return _.filter(_.uniq(array), function(item) { - return _.every(rest, function(other) { - return _.indexOf(other, item) >= 0; - }); - }); - }; - - // Take the difference between one array and a number of other arrays. - // Only the elements present in just the first array will remain. - _.difference = function(array) { - var rest = _.flatten(slice.call(arguments, 1)); - return _.filter(array, function(value){ return !_.include(rest, value); }); - }; - - // Zip together multiple lists into a single array -- elements that share - // an index go together. - _.zip = function() { - var args = slice.call(arguments); - var length = _.max(_.pluck(args, 'length')); - var results = new Array(length); - for (var i = 0; i < length; i++) results[i] = _.pluck(args, "" + i); - return results; - }; - - // If the browser doesn't supply us with indexOf (I'm looking at you, **MSIE**), - // we need this function. Return the position of the first occurrence of an - // item in an array, or -1 if the item is not included in the array. - // Delegates to **ECMAScript 5**'s native `indexOf` if available. - // If the array is large and already in sort order, pass `true` - // for **isSorted** to use binary search. - _.indexOf = function(array, item, isSorted) { - if (array == null) return -1; - var i, l; - if (isSorted) { - i = _.sortedIndex(array, item); - return array[i] === item ? i : -1; - } - if (nativeIndexOf && array.indexOf === nativeIndexOf) return array.indexOf(item); - for (i = 0, l = array.length; i < l; i++) if (i in array && array[i] === item) return i; - return -1; - }; - - // Delegates to **ECMAScript 5**'s native `lastIndexOf` if available. - _.lastIndexOf = function(array, item) { - if (array == null) return -1; - if (nativeLastIndexOf && array.lastIndexOf === nativeLastIndexOf) return array.lastIndexOf(item); - var i = array.length; - while (i--) if (i in array && array[i] === item) return i; - return -1; - }; - - // Generate an integer Array containing an arithmetic progression. A port of - // the native Python `range()` function. See - // [the Python documentation](http://docs.python.org/library/functions.html#range). - _.range = function(start, stop, step) { - if (arguments.length <= 1) { - stop = start || 0; - start = 0; - } - step = arguments[2] || 1; - - var len = Math.max(Math.ceil((stop - start) / step), 0); - var idx = 0; - var range = new Array(len); - - while(idx < len) { - range[idx++] = start; - start += step; - } - - return range; - }; - - // Function (ahem) Functions - // ------------------ - - // Reusable constructor function for prototype setting. - var ctor = function(){}; - - // Create a function bound to a given object (assigning `this`, and arguments, - // optionally). Binding with arguments is also known as `curry`. - // Delegates to **ECMAScript 5**'s native `Function.bind` if available. - // We check for `func.bind` first, to fail fast when `func` is undefined. - _.bind = function bind(func, context) { - var bound, args; - if (func.bind === nativeBind && nativeBind) return nativeBind.apply(func, slice.call(arguments, 1)); - if (!_.isFunction(func)) throw new TypeError; - args = slice.call(arguments, 2); - return bound = function() { - if (!(this instanceof bound)) return func.apply(context, args.concat(slice.call(arguments))); - ctor.prototype = func.prototype; - var self = new ctor; - var result = func.apply(self, args.concat(slice.call(arguments))); - if (Object(result) === result) return result; - return self; - }; - }; - - // Bind all of an object's methods to that object. Useful for ensuring that - // all callbacks defined on an object belong to it. - _.bindAll = function(obj) { - var funcs = slice.call(arguments, 1); - if (funcs.length == 0) funcs = _.functions(obj); - each(funcs, function(f) { obj[f] = _.bind(obj[f], obj); }); - return obj; - }; - - // Memoize an expensive function by storing its results. - _.memoize = function(func, hasher) { - var memo = {}; - hasher || (hasher = _.identity); - return function() { - var key = hasher.apply(this, arguments); - return _.has(memo, key) ? memo[key] : (memo[key] = func.apply(this, arguments)); - }; - }; - - // Delays a function for the given number of milliseconds, and then calls - // it with the arguments supplied. - _.delay = function(func, wait) { - var args = slice.call(arguments, 2); - return setTimeout(function(){ return func.apply(func, args); }, wait); - }; - - // Defers a function, scheduling it to run after the current call stack has - // cleared. - _.defer = function(func) { - return _.delay.apply(_, [func, 1].concat(slice.call(arguments, 1))); - }; - - // Returns a function, that, when invoked, will only be triggered at most once - // during a given window of time. - _.throttle = function(func, wait) { - var context, args, timeout, throttling, more; - var whenDone = _.debounce(function(){ more = throttling = false; }, wait); - return function() { - context = this; args = arguments; - var later = function() { - timeout = null; - if (more) func.apply(context, args); - whenDone(); - }; - if (!timeout) timeout = setTimeout(later, wait); - if (throttling) { - more = true; - } else { - func.apply(context, args); - } - whenDone(); - throttling = true; - }; - }; - - // Returns a function, that, as long as it continues to be invoked, will not - // be triggered. The function will be called after it stops being called for - // N milliseconds. - _.debounce = function(func, wait) { - var timeout; - return function() { - var context = this, args = arguments; - var later = function() { - timeout = null; - func.apply(context, args); - }; - clearTimeout(timeout); - timeout = setTimeout(later, wait); - }; - }; - - // Returns a function that will be executed at most one time, no matter how - // often you call it. Useful for lazy initialization. - _.once = function(func) { - var ran = false, memo; - return function() { - if (ran) return memo; - ran = true; - return memo = func.apply(this, arguments); - }; - }; - - // Returns the first function passed as an argument to the second, - // allowing you to adjust arguments, run code before and after, and - // conditionally execute the original function. - _.wrap = function(func, wrapper) { - return function() { - var args = [func].concat(slice.call(arguments, 0)); - return wrapper.apply(this, args); - }; - }; - - // Returns a function that is the composition of a list of functions, each - // consuming the return value of the function that follows. - _.compose = function() { - var funcs = arguments; - return function() { - var args = arguments; - for (var i = funcs.length - 1; i >= 0; i--) { - args = [funcs[i].apply(this, args)]; - } - return args[0]; - }; - }; - - // Returns a function that will only be executed after being called N times. - _.after = function(times, func) { - if (times <= 0) return func(); - return function() { - if (--times < 1) { return func.apply(this, arguments); } - }; - }; - - // Object Functions - // ---------------- - - // Retrieve the names of an object's properties. - // Delegates to **ECMAScript 5**'s native `Object.keys` - _.keys = nativeKeys || function(obj) { - if (obj !== Object(obj)) throw new TypeError('Invalid object'); - var keys = []; - for (var key in obj) if (_.has(obj, key)) keys[keys.length] = key; - return keys; - }; - - // Retrieve the values of an object's properties. - _.values = function(obj) { - return _.map(obj, _.identity); - }; - - // Return a sorted list of the function names available on the object. - // Aliased as `methods` - _.functions = _.methods = function(obj) { - var names = []; - for (var key in obj) { - if (_.isFunction(obj[key])) names.push(key); - } - return names.sort(); - }; - - // Extend a given object with all the properties in passed-in object(s). - _.extend = function(obj) { - each(slice.call(arguments, 1), function(source) { - for (var prop in source) { - obj[prop] = source[prop]; - } - }); - return obj; - }; - - // Fill in a given object with default properties. - _.defaults = function(obj) { - each(slice.call(arguments, 1), function(source) { - for (var prop in source) { - if (obj[prop] == null) obj[prop] = source[prop]; - } - }); - return obj; - }; - - // Create a (shallow-cloned) duplicate of an object. - _.clone = function(obj) { - if (!_.isObject(obj)) return obj; - return _.isArray(obj) ? obj.slice() : _.extend({}, obj); - }; - - // Invokes interceptor with the obj, and then returns obj. - // The primary purpose of this method is to "tap into" a method chain, in - // order to perform operations on intermediate results within the chain. - _.tap = function(obj, interceptor) { - interceptor(obj); - return obj; - }; - - // Internal recursive comparison function. - function eq(a, b, stack) { - // Identical objects are equal. `0 === -0`, but they aren't identical. - // See the Harmony `egal` proposal: http://wiki.ecmascript.org/doku.php?id=harmony:egal. - if (a === b) return a !== 0 || 1 / a == 1 / b; - // A strict comparison is necessary because `null == undefined`. - if (a == null || b == null) return a === b; - // Unwrap any wrapped objects. - if (a._chain) a = a._wrapped; - if (b._chain) b = b._wrapped; - // Invoke a custom `isEqual` method if one is provided. - if (a.isEqual && _.isFunction(a.isEqual)) return a.isEqual(b); - if (b.isEqual && _.isFunction(b.isEqual)) return b.isEqual(a); - // Compare `[[Class]]` names. - var className = toString.call(a); - if (className != toString.call(b)) return false; - switch (className) { - // Strings, numbers, dates, and booleans are compared by value. - case '[object String]': - // Primitives and their corresponding object wrappers are equivalent; thus, `"5"` is - // equivalent to `new String("5")`. - return a == String(b); - case '[object Number]': - // `NaN`s are equivalent, but non-reflexive. An `egal` comparison is performed for - // other numeric values. - return a != +a ? b != +b : (a == 0 ? 1 / a == 1 / b : a == +b); - case '[object Date]': - case '[object Boolean]': - // Coerce dates and booleans to numeric primitive values. Dates are compared by their - // millisecond representations. Note that invalid dates with millisecond representations - // of `NaN` are not equivalent. - return +a == +b; - // RegExps are compared by their source patterns and flags. - case '[object RegExp]': - return a.source == b.source && - a.global == b.global && - a.multiline == b.multiline && - a.ignoreCase == b.ignoreCase; - } - if (typeof a != 'object' || typeof b != 'object') return false; - // Assume equality for cyclic structures. The algorithm for detecting cyclic - // structures is adapted from ES 5.1 section 15.12.3, abstract operation `JO`. - var length = stack.length; - while (length--) { - // Linear search. Performance is inversely proportional to the number of - // unique nested structures. - if (stack[length] == a) return true; - } - // Add the first object to the stack of traversed objects. - stack.push(a); - var size = 0, result = true; - // Recursively compare objects and arrays. - if (className == '[object Array]') { - // Compare array lengths to determine if a deep comparison is necessary. - size = a.length; - result = size == b.length; - if (result) { - // Deep compare the contents, ignoring non-numeric properties. - while (size--) { - // Ensure commutative equality for sparse arrays. - if (!(result = size in a == size in b && eq(a[size], b[size], stack))) break; - } - } - } else { - // Objects with different constructors are not equivalent. - if ('constructor' in a != 'constructor' in b || a.constructor != b.constructor) return false; - // Deep compare objects. - for (var key in a) { - if (_.has(a, key)) { - // Count the expected number of properties. - size++; - // Deep compare each member. - if (!(result = _.has(b, key) && eq(a[key], b[key], stack))) break; - } - } - // Ensure that both objects contain the same number of properties. - if (result) { - for (key in b) { - if (_.has(b, key) && !(size--)) break; - } - result = !size; - } - } - // Remove the first object from the stack of traversed objects. - stack.pop(); - return result; - } - - // Perform a deep comparison to check if two objects are equal. - _.isEqual = function(a, b) { - return eq(a, b, []); - }; - - // Is a given array, string, or object empty? - // An "empty" object has no enumerable own-properties. - _.isEmpty = function(obj) { - if (_.isArray(obj) || _.isString(obj)) return obj.length === 0; - for (var key in obj) if (_.has(obj, key)) return false; - return true; - }; - - // Is a given value a DOM element? - _.isElement = function(obj) { - return !!(obj && obj.nodeType == 1); - }; - - // Is a given value an array? - // Delegates to ECMA5's native Array.isArray - _.isArray = nativeIsArray || function(obj) { - return toString.call(obj) == '[object Array]'; - }; - - // Is a given variable an object? - _.isObject = function(obj) { - return obj === Object(obj); - }; - - // Is a given variable an arguments object? - _.isArguments = function(obj) { - return toString.call(obj) == '[object Arguments]'; - }; - if (!_.isArguments(arguments)) { - _.isArguments = function(obj) { - return !!(obj && _.has(obj, 'callee')); - }; - } - - // Is a given value a function? - _.isFunction = function(obj) { - return toString.call(obj) == '[object Function]'; - }; - - // Is a given value a string? - _.isString = function(obj) { - return toString.call(obj) == '[object String]'; - }; - - // Is a given value a number? - _.isNumber = function(obj) { - return toString.call(obj) == '[object Number]'; - }; - - // Is the given value `NaN`? - _.isNaN = function(obj) { - // `NaN` is the only value for which `===` is not reflexive. - return obj !== obj; - }; - - // Is a given value a boolean? - _.isBoolean = function(obj) { - return obj === true || obj === false || toString.call(obj) == '[object Boolean]'; - }; - - // Is a given value a date? - _.isDate = function(obj) { - return toString.call(obj) == '[object Date]'; - }; - - // Is the given value a regular expression? - _.isRegExp = function(obj) { - return toString.call(obj) == '[object RegExp]'; - }; - - // Is a given value equal to null? - _.isNull = function(obj) { - return obj === null; - }; - - // Is a given variable undefined? - _.isUndefined = function(obj) { - return obj === void 0; - }; - - // Has own property? - _.has = function(obj, key) { - return hasOwnProperty.call(obj, key); - }; - - // Utility Functions - // ----------------- - - // Run Underscore.js in *noConflict* mode, returning the `_` variable to its - // previous owner. Returns a reference to the Underscore object. - _.noConflict = function() { - root._ = previousUnderscore; - return this; - }; - - // Keep the identity function around for default iterators. - _.identity = function(value) { - return value; - }; - - // Run a function **n** times. - _.times = function (n, iterator, context) { - for (var i = 0; i < n; i++) iterator.call(context, i); - }; - - // Escape a string for HTML interpolation. - _.escape = function(string) { - return (''+string).replace(/&/g, '&').replace(/</g, '<').replace(/>/g, '>').replace(/"/g, '"').replace(/'/g, ''').replace(/\//g,'/'); - }; - - // Add your own custom functions to the Underscore object, ensuring that - // they're correctly added to the OOP wrapper as well. - _.mixin = function(obj) { - each(_.functions(obj), function(name){ - addToWrapper(name, _[name] = obj[name]); - }); - }; - - // Generate a unique integer id (unique within the entire client session). - // Useful for temporary DOM ids. - var idCounter = 0; - _.uniqueId = function(prefix) { - var id = idCounter++; - return prefix ? prefix + id : id; - }; - - // By default, Underscore uses ERB-style template delimiters, change the - // following template settings to use alternative delimiters. - _.templateSettings = { - evaluate : /<%([\s\S]+?)%>/g, - interpolate : /<%=([\s\S]+?)%>/g, - escape : /<%-([\s\S]+?)%>/g - }; - - // When customizing `templateSettings`, if you don't want to define an - // interpolation, evaluation or escaping regex, we need one that is - // guaranteed not to match. - var noMatch = /.^/; - - // Within an interpolation, evaluation, or escaping, remove HTML escaping - // that had been previously added. - var unescape = function(code) { - return code.replace(/\\\\/g, '\\').replace(/\\'/g, "'"); - }; - - // JavaScript micro-templating, similar to John Resig's implementation. - // Underscore templating handles arbitrary delimiters, preserves whitespace, - // and correctly escapes quotes within interpolated code. - _.template = function(str, data) { - var c = _.templateSettings; - var tmpl = 'var __p=[],print=function(){__p.push.apply(__p,arguments);};' + - 'with(obj||{}){__p.push(\'' + - str.replace(/\\/g, '\\\\') - .replace(/'/g, "\\'") - .replace(c.escape || noMatch, function(match, code) { - return "',_.escape(" + unescape(code) + "),'"; - }) - .replace(c.interpolate || noMatch, function(match, code) { - return "'," + unescape(code) + ",'"; - }) - .replace(c.evaluate || noMatch, function(match, code) { - return "');" + unescape(code).replace(/[\r\n\t]/g, ' ') + ";__p.push('"; - }) - .replace(/\r/g, '\\r') - .replace(/\n/g, '\\n') - .replace(/\t/g, '\\t') - + "');}return __p.join('');"; - var func = new Function('obj', '_', tmpl); - if (data) return func(data, _); - return function(data) { - return func.call(this, data, _); - }; - }; - - // Add a "chain" function, which will delegate to the wrapper. - _.chain = function(obj) { - return _(obj).chain(); - }; - - // The OOP Wrapper - // --------------- - - // If Underscore is called as a function, it returns a wrapped object that - // can be used OO-style. This wrapper holds altered versions of all the - // underscore functions. Wrapped objects may be chained. - var wrapper = function(obj) { this._wrapped = obj; }; - - // Expose `wrapper.prototype` as `_.prototype` - _.prototype = wrapper.prototype; - - // Helper function to continue chaining intermediate results. - var result = function(obj, chain) { - return chain ? _(obj).chain() : obj; - }; - - // A method to easily add functions to the OOP wrapper. - var addToWrapper = function(name, func) { - wrapper.prototype[name] = function() { - var args = slice.call(arguments); - unshift.call(args, this._wrapped); - return result(func.apply(_, args), this._chain); - }; - }; - - // Add all of the Underscore functions to the wrapper object. - _.mixin(_); - - // Add all mutator Array functions to the wrapper. - each(['pop', 'push', 'reverse', 'shift', 'sort', 'splice', 'unshift'], function(name) { - var method = ArrayProto[name]; - wrapper.prototype[name] = function() { - var wrapped = this._wrapped; - method.apply(wrapped, arguments); - var length = wrapped.length; - if ((name == 'shift' || name == 'splice') && length === 0) delete wrapped[0]; - return result(wrapped, this._chain); - }; - }); - - // Add all accessor Array functions to the wrapper. - each(['concat', 'join', 'slice'], function(name) { - var method = ArrayProto[name]; - wrapper.prototype[name] = function() { - return result(method.apply(this._wrapped, arguments), this._chain); - }; - }); - - // Start chaining a wrapped Underscore object. - wrapper.prototype.chain = function() { - this._chain = true; - return this; - }; - - // Extracts the result from a wrapped and chained object. - wrapper.prototype.value = function() { - return this._wrapped; - }; - -}).call(this); |