(function() { var define, requireModule; (function() { var registry = {}, seen = {}; define = function(name, deps, callback) { registry[name] = { deps: deps, callback: callback }; }; requireModule = function(name) { if (seen[name]) { return seen[name]; } seen[name] = {}; var mod = registry[name], deps = mod.deps, callback = mod.callback, reified = [], exports; for (var i=0, l=deps.length; i= 0) { intersection.push(element); } }); return intersection; } }; })(); (function() { /*jshint newcap:false*/ /** @module ember-metal */ // NOTE: There is a bug in jshint that doesn't recognize `Object()` without `new` // as being ok unless both `newcap:false` and not `use strict`. // https://github.com/jshint/jshint/issues/392 // Testing this is not ideal, but we want to use native functions // if available, but not to use versions created by libraries like Prototype var isNativeFunc = function(func) { // This should probably work in all browsers likely to have ES5 array methods return func && Function.prototype.toString.call(func).indexOf('[native code]') > -1; }; // From: https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/array/map var arrayMap = isNativeFunc(Array.prototype.map) ? Array.prototype.map : function(fun /*, thisp */) { //"use strict"; if (this === void 0 || this === null) { throw new TypeError(); } var t = Object(this); var len = t.length >>> 0; if (typeof fun !== "function") { throw new TypeError(); } var res = new Array(len); var thisp = arguments[1]; for (var i = 0; i < len; i++) { if (i in t) { res[i] = fun.call(thisp, t[i], i, t); } } return res; }; // From: https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/array/foreach var arrayForEach = isNativeFunc(Array.prototype.forEach) ? Array.prototype.forEach : function(fun /*, thisp */) { //"use strict"; if (this === void 0 || this === null) { throw new TypeError(); } var t = Object(this); var len = t.length >>> 0; if (typeof fun !== "function") { throw new TypeError(); } var thisp = arguments[1]; for (var i = 0; i < len; i++) { if (i in t) { fun.call(thisp, t[i], i, t); } } }; var arrayIndexOf = isNativeFunc(Array.prototype.indexOf) ? Array.prototype.indexOf : function (obj, fromIndex) { if (fromIndex === null || fromIndex === undefined) { fromIndex = 0; } else if (fromIndex < 0) { fromIndex = Math.max(0, this.length + fromIndex); } for (var i = fromIndex, j = this.length; i < j; i++) { if (this[i] === obj) { return i; } } return -1; }; Ember.ArrayPolyfills = { map: arrayMap, forEach: arrayForEach, indexOf: arrayIndexOf }; if (Ember.SHIM_ES5) { if (!Array.prototype.map) { Array.prototype.map = arrayMap; } if (!Array.prototype.forEach) { Array.prototype.forEach = arrayForEach; } if (!Array.prototype.indexOf) { Array.prototype.indexOf = arrayIndexOf; } } })(); (function() { /** @module ember-metal */ /* JavaScript (before ES6) does not have a Map implementation. Objects, which are often used as dictionaries, may only have Strings as keys. Because Ember has a way to get a unique identifier for every object via `Ember.guidFor`, we can implement a performant Map with arbitrary keys. Because it is commonly used in low-level bookkeeping, Map is implemented as a pure JavaScript object for performance. This implementation follows the current iteration of the ES6 proposal for maps (http://wiki.ecmascript.org/doku.php?id=harmony:simple_maps_and_sets), with two exceptions. First, because we need our implementation to be pleasant on older browsers, we do not use the `delete` name (using `remove` instead). Second, as we do not have the luxury of in-VM iteration, we implement a forEach method for iteration. Map is mocked out to look like an Ember object, so you can do `Ember.Map.create()` for symmetry with other Ember classes. */ var guidFor = Ember.guidFor, indexOf = Ember.ArrayPolyfills.indexOf; var copy = function(obj) { var output = {}; for (var prop in obj) { if (obj.hasOwnProperty(prop)) { output[prop] = obj[prop]; } } return output; }; var copyMap = function(original, newObject) { var keys = original.keys.copy(), values = copy(original.values); newObject.keys = keys; newObject.values = values; return newObject; }; /** This class is used internally by Ember and Ember Data. Please do not use it at this time. We plan to clean it up and add many tests soon. @class OrderedSet @namespace Ember @constructor @private */ var OrderedSet = Ember.OrderedSet = function() { this.clear(); }; /** @method create @static @return {Ember.OrderedSet} */ OrderedSet.create = function() { return new OrderedSet(); }; OrderedSet.prototype = { /** @method clear */ clear: function() { this.presenceSet = {}; this.list = []; }, /** @method add @param obj */ add: function(obj) { var guid = guidFor(obj), presenceSet = this.presenceSet, list = this.list; if (guid in presenceSet) { return; } presenceSet[guid] = true; list.push(obj); }, /** @method remove @param obj */ remove: function(obj) { var guid = guidFor(obj), presenceSet = this.presenceSet, list = this.list; delete presenceSet[guid]; var index = indexOf.call(list, obj); if (index > -1) { list.splice(index, 1); } }, /** @method isEmpty @return {Boolean} */ isEmpty: function() { return this.list.length === 0; }, /** @method has @param obj @return {Boolean} */ has: function(obj) { var guid = guidFor(obj), presenceSet = this.presenceSet; return guid in presenceSet; }, /** @method forEach @param {Function} function @param target */ forEach: function(fn, self) { // allow mutation during iteration var list = this.list.slice(); for (var i = 0, j = list.length; i < j; i++) { fn.call(self, list[i]); } }, /** @method toArray @return {Array} */ toArray: function() { return this.list.slice(); }, /** @method copy @return {Ember.OrderedSet} */ copy: function() { var set = new OrderedSet(); set.presenceSet = copy(this.presenceSet); set.list = this.list.slice(); return set; } }; /** A Map stores values indexed by keys. Unlike JavaScript's default Objects, the keys of a Map can be any JavaScript object. Internally, a Map has two data structures: 1. `keys`: an OrderedSet of all of the existing keys 2. `values`: a JavaScript Object indexed by the `Ember.guidFor(key)` When a key/value pair is added for the first time, we add the key to the `keys` OrderedSet, and create or replace an entry in `values`. When an entry is deleted, we delete its entry in `keys` and `values`. @class Map @namespace Ember @private @constructor */ var Map = Ember.Map = function() { this.keys = Ember.OrderedSet.create(); this.values = {}; }; /** @method create @static */ Map.create = function() { return new Map(); }; Map.prototype = { /** Retrieve the value associated with a given key. @method get @param {anything} key @return {anything} the value associated with the key, or `undefined` */ get: function(key) { var values = this.values, guid = guidFor(key); return values[guid]; }, /** Adds a value to the map. If a value for the given key has already been provided, the new value will replace the old value. @method set @param {anything} key @param {anything} value */ set: function(key, value) { var keys = this.keys, values = this.values, guid = guidFor(key); keys.add(key); values[guid] = value; }, /** Removes a value from the map for an associated key. @method remove @param {anything} key @return {Boolean} true if an item was removed, false otherwise */ remove: function(key) { // don't use ES6 "delete" because it will be annoying // to use in browsers that are not ES6 friendly; var keys = this.keys, values = this.values, guid = guidFor(key), value; if (values.hasOwnProperty(guid)) { keys.remove(key); value = values[guid]; delete values[guid]; return true; } else { return false; } }, /** Check whether a key is present. @method has @param {anything} key @return {Boolean} true if the item was present, false otherwise */ has: function(key) { var values = this.values, guid = guidFor(key); return values.hasOwnProperty(guid); }, /** Iterate over all the keys and values. Calls the function once for each key, passing in the key and value, in that order. The keys are guaranteed to be iterated over in insertion order. @method forEach @param {Function} callback @param {anything} self if passed, the `this` value inside the callback. By default, `this` is the map. */ forEach: function(callback, self) { var keys = this.keys, values = this.values; keys.forEach(function(key) { var guid = guidFor(key); callback.call(self, key, values[guid]); }); }, /** @method copy @return {Ember.Map} */ copy: function() { return copyMap(this, new Map()); } }; /** @class MapWithDefault @namespace Ember @extends Ember.Map @private @constructor @param [options] @param {anything} [options.defaultValue] */ var MapWithDefault = Ember.MapWithDefault = function(options) { Map.call(this); this.defaultValue = options.defaultValue; }; /** @method create @static @param [options] @param {anything} [options.defaultValue] @return {Ember.MapWithDefault|Ember.Map} If options are passed, returns `Ember.MapWithDefault` otherwise returns `Ember.Map` */ MapWithDefault.create = function(options) { if (options) { return new MapWithDefault(options); } else { return new Map(); } }; MapWithDefault.prototype = Ember.create(Map.prototype); /** Retrieve the value associated with a given key. @method get @param {anything} key @return {anything} the value associated with the key, or the default value */ MapWithDefault.prototype.get = function(key) { var hasValue = this.has(key); if (hasValue) { return Map.prototype.get.call(this, key); } else { var defaultValue = this.defaultValue(key); this.set(key, defaultValue); return defaultValue; } }; /** @method copy @return {Ember.MapWithDefault} */ MapWithDefault.prototype.copy = function() { return copyMap(this, new MapWithDefault({ defaultValue: this.defaultValue })); }; })(); (function() { /** @module ember-metal */ var META_KEY = Ember.META_KEY, get, set; var MANDATORY_SETTER = Ember.ENV.MANDATORY_SETTER; var IS_GLOBAL = /^([A-Z$]|([0-9][A-Z$]))/; var IS_GLOBAL_PATH = /^([A-Z$]|([0-9][A-Z$])).*[\.\*]/; var HAS_THIS = /^this[\.\*]/; var FIRST_KEY = /^([^\.\*]+)/; // .......................................................... // GET AND SET // // If we are on a platform that supports accessors we can get use those. // Otherwise simulate accessors by looking up the property directly on the // object. /** Gets the value of a property on an object. If the property is computed, the function will be invoked. If the property is not defined but the object implements the `unknownProperty` method then that will be invoked. If you plan to run on IE8 and older browsers then you should use this method anytime you want to retrieve a property on an object that you don't know for sure is private. (Properties beginning with an underscore '_' are considered private.) On all newer browsers, you only need to use this method to retrieve properties if the property might not be defined on the object and you want to respect the `unknownProperty` handler. Otherwise you can ignore this method. Note that if the object itself is `undefined`, this method will throw an error. @method get @for Ember @param {Object} obj The object to retrieve from. @param {String} keyName The property key to retrieve @return {Object} the property value or `null`. */ get = function get(obj, keyName) { // Helpers that operate with 'this' within an #each if (keyName === '') { return obj; } if (!keyName && 'string'===typeof obj) { keyName = obj; obj = null; } if (!obj || keyName.indexOf('.') !== -1) { return getPath(obj, keyName); } var meta = obj[META_KEY], desc = meta && meta.descs[keyName], ret; if (desc) { return desc.get(obj, keyName); } else { if (MANDATORY_SETTER && meta && meta.watching[keyName] > 0) { ret = meta.values[keyName]; } else { ret = obj[keyName]; } if (ret === undefined && 'object' === typeof obj && !(keyName in obj) && 'function' === typeof obj.unknownProperty) { return obj.unknownProperty(keyName); } return ret; } }; /** Sets the value of a property on an object, respecting computed properties and notifying observers and other listeners of the change. If the property is not defined but the object implements the `unknownProperty` method then that will be invoked as well. If you plan to run on IE8 and older browsers then you should use this method anytime you want to set a property on an object that you don't know for sure is private. (Properties beginning with an underscore '_' are considered private.) On all newer browsers, you only need to use this method to set properties if the property might not be defined on the object and you want to respect the `unknownProperty` handler. Otherwise you can ignore this method. @method set @for Ember @param {Object} obj The object to modify. @param {String} keyName The property key to set @param {Object} value The value to set @return {Object} the passed value. */ set = function set(obj, keyName, value, tolerant) { if (typeof obj === 'string') { value = keyName; keyName = obj; obj = null; } if (!obj || keyName.indexOf('.') !== -1) { return setPath(obj, keyName, value, tolerant); } var meta = obj[META_KEY], desc = meta && meta.descs[keyName], isUnknown, currentValue; if (desc) { desc.set(obj, keyName, value); } else { isUnknown = 'object' === typeof obj && !(keyName in obj); // setUnknownProperty is called if `obj` is an object, // the property does not already exist, and the // `setUnknownProperty` method exists on the object if (isUnknown && 'function' === typeof obj.setUnknownProperty) { obj.setUnknownProperty(keyName, value); } else if (meta && meta.watching[keyName] > 0) { if (MANDATORY_SETTER) { currentValue = meta.values[keyName]; } else { currentValue = obj[keyName]; } // only trigger a change if the value has changed if (value !== currentValue) { Ember.propertyWillChange(obj, keyName); if (MANDATORY_SETTER) { if (currentValue === undefined && !(keyName in obj)) { Ember.defineProperty(obj, keyName, null, value); // setup mandatory setter } else { meta.values[keyName] = value; } } else { obj[keyName] = value; } Ember.propertyDidChange(obj, keyName); } } else { obj[keyName] = value; } } return value; }; // Currently used only by Ember Data tests if (Ember.config.overrideAccessors) { Ember.get = get; Ember.set = set; Ember.config.overrideAccessors(); get = Ember.get; set = Ember.set; } function firstKey(path) { return path.match(FIRST_KEY)[0]; } // assumes path is already normalized function normalizeTuple(target, path) { var hasThis = HAS_THIS.test(path), isGlobal = !hasThis && IS_GLOBAL_PATH.test(path), key; if (!target || isGlobal) target = Ember.lookup; if (hasThis) path = path.slice(5); if (target === Ember.lookup) { key = firstKey(path); target = get(target, key); path = path.slice(key.length+1); } // must return some kind of path to be valid else other things will break. if (!path || path.length===0) throw new Error('Invalid Path'); return [ target, path ]; } function getPath(root, path) { var hasThis, parts, tuple, idx, len; // If there is no root and path is a key name, return that // property from the global object. // E.g. get('Ember') -> Ember if (root === null && path.indexOf('.') === -1) { return get(Ember.lookup, path); } // detect complicated paths and normalize them hasThis = HAS_THIS.test(path); if (!root || hasThis) { tuple = normalizeTuple(root, path); root = tuple[0]; path = tuple[1]; tuple.length = 0; } parts = path.split("."); len = parts.length; for (idx=0; root && idx 0; if (existingDesc instanceof Ember.Descriptor) { existingDesc.teardown(obj, keyName); } if (desc instanceof Ember.Descriptor) { value = desc; descs[keyName] = desc; if (MANDATORY_SETTER && watching) { objectDefineProperty(obj, keyName, { configurable: true, enumerable: true, writable: true, value: undefined // make enumerable }); } else { obj[keyName] = undefined; // make enumerable } desc.setup(obj, keyName); } else { descs[keyName] = undefined; // shadow descriptor in proto if (desc == null) { value = data; if (MANDATORY_SETTER && watching) { meta.values[keyName] = data; objectDefineProperty(obj, keyName, { configurable: true, enumerable: true, set: MANDATORY_SETTER_FUNCTION, get: DEFAULT_GETTER_FUNCTION(keyName) }); } else { obj[keyName] = data; } } else { value = desc; // compatibility with ES5 objectDefineProperty(obj, keyName, desc); } } // if key is being watched, override chains that // were initialized with the prototype if (watching) { Ember.overrideChains(obj, keyName, meta); } // The `value` passed to the `didDefineProperty` hook is // either the descriptor or data, whichever was passed. if (obj.didDefineProperty) { obj.didDefineProperty(obj, keyName, value); } return this; }; })(); (function() { // Ember.tryFinally /** @module ember-metal */ var AFTER_OBSERVERS = ':change'; var BEFORE_OBSERVERS = ':before'; var guidFor = Ember.guidFor; var deferred = 0; /* this.observerSet = { [senderGuid]: { // variable name: `keySet` [keyName]: listIndex } }, this.observers = [ { sender: obj, keyName: keyName, eventName: eventName, listeners: [ [target, method, onceFlag, suspendedFlag] ] }, ... ] */ function ObserverSet() { this.clear(); } ObserverSet.prototype.add = function(sender, keyName, eventName) { var observerSet = this.observerSet, observers = this.observers, senderGuid = Ember.guidFor(sender), keySet = observerSet[senderGuid], index; if (!keySet) { observerSet[senderGuid] = keySet = {}; } index = keySet[keyName]; if (index === undefined) { index = observers.push({ sender: sender, keyName: keyName, eventName: eventName, listeners: [] }) - 1; keySet[keyName] = index; } return observers[index].listeners; }; ObserverSet.prototype.flush = function() { var observers = this.observers, i, len, observer, sender; this.clear(); for (i=0, len=observers.length; i < len; ++i) { observer = observers[i]; sender = observer.sender; if (sender.isDestroying || sender.isDestroyed) { continue; } Ember.sendEvent(sender, observer.eventName, [sender, observer.keyName], observer.listeners); } }; ObserverSet.prototype.clear = function() { this.observerSet = {}; this.observers = []; }; var beforeObserverSet = new ObserverSet(), observerSet = new ObserverSet(); /** @method beginPropertyChanges @chainable */ Ember.beginPropertyChanges = function() { deferred++; }; /** @method endPropertyChanges */ Ember.endPropertyChanges = function() { deferred--; if (deferred<=0) { beforeObserverSet.clear(); observerSet.flush(); } }; /** Make a series of property changes together in an exception-safe way. ```javascript Ember.changeProperties(function() { obj1.set('foo', mayBlowUpWhenSet); obj2.set('bar', baz); }); ``` @method changeProperties @param {Function} callback @param [binding] */ Ember.changeProperties = function(cb, binding){ Ember.beginPropertyChanges(); Ember.tryFinally(cb, Ember.endPropertyChanges, binding); }; /** Set a list of properties on an object. These properties are set inside a single `beginPropertyChanges` and `endPropertyChanges` batch, so observers will be buffered. @method setProperties @param target @param {Hash} properties @return target */ Ember.setProperties = function(self, hash) { Ember.changeProperties(function(){ for(var prop in hash) { if (hash.hasOwnProperty(prop)) Ember.set(self, prop, hash[prop]); } }); return self; }; function changeEvent(keyName) { return keyName+AFTER_OBSERVERS; } function beforeEvent(keyName) { return keyName+BEFORE_OBSERVERS; } /** @method addObserver @param obj @param {String} path @param {Object|Function} targetOrMethod @param {Function|String} [method] */ Ember.addObserver = function(obj, path, target, method) { Ember.addListener(obj, changeEvent(path), target, method); Ember.watch(obj, path); return this; }; Ember.observersFor = function(obj, path) { return Ember.listenersFor(obj, changeEvent(path)); }; /** @method removeObserver @param obj @param {String} path @param {Object|Function} targetOrMethod @param {Function|String} [method] */ Ember.removeObserver = function(obj, path, target, method) { Ember.unwatch(obj, path); Ember.removeListener(obj, changeEvent(path), target, method); return this; }; /** @method addBeforeObserver @param obj @param {String} path @param {Object|Function} targetOrMethod @param {Function|String} [method] */ Ember.addBeforeObserver = function(obj, path, target, method) { Ember.addListener(obj, beforeEvent(path), target, method); Ember.watch(obj, path); return this; }; // Suspend observer during callback. // // This should only be used by the target of the observer // while it is setting the observed path. Ember._suspendBeforeObserver = function(obj, path, target, method, callback) { return Ember._suspendListener(obj, beforeEvent(path), target, method, callback); }; Ember._suspendObserver = function(obj, path, target, method, callback) { return Ember._suspendListener(obj, changeEvent(path), target, method, callback); }; var map = Ember.ArrayPolyfills.map; Ember._suspendBeforeObservers = function(obj, paths, target, method, callback) { var events = map.call(paths, beforeEvent); return Ember._suspendListeners(obj, events, target, method, callback); }; Ember._suspendObservers = function(obj, paths, target, method, callback) { var events = map.call(paths, changeEvent); return Ember._suspendListeners(obj, events, target, method, callback); }; Ember.beforeObserversFor = function(obj, path) { return Ember.listenersFor(obj, beforeEvent(path)); }; /** @method removeBeforeObserver @param obj @param {String} path @param {Object|Function} targetOrMethod @param {Function|String} [method] */ Ember.removeBeforeObserver = function(obj, path, target, method) { Ember.unwatch(obj, path); Ember.removeListener(obj, beforeEvent(path), target, method); return this; }; Ember.notifyBeforeObservers = function(obj, keyName) { if (obj.isDestroying) { return; } var eventName = beforeEvent(keyName), listeners, listenersDiff; if (deferred) { listeners = beforeObserverSet.add(obj, keyName, eventName); listenersDiff = Ember.listenersDiff(obj, eventName, listeners); Ember.sendEvent(obj, eventName, [obj, keyName], listenersDiff); } else { Ember.sendEvent(obj, eventName, [obj, keyName]); } }; Ember.notifyObservers = function(obj, keyName) { if (obj.isDestroying) { return; } var eventName = changeEvent(keyName), listeners; if (deferred) { listeners = observerSet.add(obj, keyName, eventName); Ember.listenersUnion(obj, eventName, listeners); } else { Ember.sendEvent(obj, eventName, [obj, keyName]); } }; })(); (function() { /** @module ember-metal */ var guidFor = Ember.guidFor, // utils.js metaFor = Ember.meta, // utils.js get = Ember.get, // accessors.js set = Ember.set, // accessors.js normalizeTuple = Ember.normalizeTuple, // accessors.js GUID_KEY = Ember.GUID_KEY, // utils.js META_KEY = Ember.META_KEY, // utils.js // circular reference observer depends on Ember.watch // we should move change events to this file or its own property_events.js notifyObservers = Ember.notifyObservers, // observer.js forEach = Ember.ArrayPolyfills.forEach, // array.js FIRST_KEY = /^([^\.\*]+)/, IS_PATH = /[\.\*]/; var MANDATORY_SETTER = Ember.ENV.MANDATORY_SETTER, o_defineProperty = Ember.platform.defineProperty; function firstKey(path) { return path.match(FIRST_KEY)[0]; } // returns true if the passed path is just a keyName function isKeyName(path) { return path==='*' || !IS_PATH.test(path); } // .......................................................... // DEPENDENT KEYS // function iterDeps(method, obj, depKey, seen, meta) { var guid = guidFor(obj); if (!seen[guid]) seen[guid] = {}; if (seen[guid][depKey]) return; seen[guid][depKey] = true; var deps = meta.deps; deps = deps && deps[depKey]; if (deps) { for(var key in deps) { var desc = meta.descs[key]; if (desc && desc._suspended === obj) continue; method(obj, key); } } } var WILL_SEEN, DID_SEEN; // called whenever a property is about to change to clear the cache of any dependent keys (and notify those properties of changes, etc...) function dependentKeysWillChange(obj, depKey, meta) { if (obj.isDestroying) { return; } var seen = WILL_SEEN, top = !seen; if (top) { seen = WILL_SEEN = {}; } iterDeps(propertyWillChange, obj, depKey, seen, meta); if (top) { WILL_SEEN = null; } } // called whenever a property has just changed to update dependent keys function dependentKeysDidChange(obj, depKey, meta) { if (obj.isDestroying) { return; } var seen = DID_SEEN, top = !seen; if (top) { seen = DID_SEEN = {}; } iterDeps(propertyDidChange, obj, depKey, seen, meta); if (top) { DID_SEEN = null; } } // .......................................................... // CHAIN // function addChainWatcher(obj, keyName, node) { if (!obj || ('object' !== typeof obj)) { return; } // nothing to do var m = metaFor(obj), nodes = m.chainWatchers; if (!m.hasOwnProperty('chainWatchers')) { nodes = m.chainWatchers = {}; } if (!nodes[keyName]) { nodes[keyName] = []; } nodes[keyName].push(node); Ember.watch(obj, keyName); } function removeChainWatcher(obj, keyName, node) { if (!obj || 'object' !== typeof obj) { return; } // nothing to do var m = metaFor(obj, false); if (!m.hasOwnProperty('chainWatchers')) { return; } // nothing to do var nodes = m.chainWatchers; if (nodes[keyName]) { nodes = nodes[keyName]; for (var i = 0, l = nodes.length; i < l; i++) { if (nodes[i] === node) { nodes.splice(i, 1); } } } Ember.unwatch(obj, keyName); } var pendingQueue = []; // attempts to add the pendingQueue chains again. If some of them end up // back in the queue and reschedule is true, schedules a timeout to try // again. function flushPendingChains() { if (pendingQueue.length === 0) { return; } // nothing to do var queue = pendingQueue; pendingQueue = []; forEach.call(queue, function(q) { q[0].add(q[1]); }); } function isProto(pvalue) { return metaFor(pvalue, false).proto === pvalue; } // A ChainNode watches a single key on an object. If you provide a starting // value for the key then the node won't actually watch it. For a root node // pass null for parent and key and object for value. var ChainNode = function(parent, key, value) { var obj; this._parent = parent; this._key = key; // _watching is true when calling get(this._parent, this._key) will // return the value of this node. // // It is false for the root of a chain (because we have no parent) // and for global paths (because the parent node is the object with // the observer on it) this._watching = value===undefined; this._value = value; this._paths = {}; if (this._watching) { this._object = parent.value(); if (this._object) { addChainWatcher(this._object, this._key, this); } } // Special-case: the EachProxy relies on immediate evaluation to // establish its observers. // // TODO: Replace this with an efficient callback that the EachProxy // can implement. if (this._parent && this._parent._key === '@each') { this.value(); } }; var ChainNodePrototype = ChainNode.prototype; ChainNodePrototype.value = function() { if (this._value === undefined && this._watching) { var obj = this._parent.value(); this._value = (obj && !isProto(obj)) ? get(obj, this._key) : undefined; } return this._value; }; ChainNodePrototype.destroy = function() { if (this._watching) { var obj = this._object; if (obj) { removeChainWatcher(obj, this._key, this); } this._watching = false; // so future calls do nothing } }; // copies a top level object only ChainNodePrototype.copy = function(obj) { var ret = new ChainNode(null, null, obj), paths = this._paths, path; for (path in paths) { if (paths[path] <= 0) { continue; } // this check will also catch non-number vals. ret.add(path); } return ret; }; // called on the root node of a chain to setup watchers on the specified // path. ChainNodePrototype.add = function(path) { var obj, tuple, key, src, paths; paths = this._paths; paths[path] = (paths[path] || 0) + 1; obj = this.value(); tuple = normalizeTuple(obj, path); // the path was a local path if (tuple[0] && tuple[0] === obj) { path = tuple[1]; key = firstKey(path); path = path.slice(key.length+1); // global path, but object does not exist yet. // put into a queue and try to connect later. } else if (!tuple[0]) { pendingQueue.push([this, path]); tuple.length = 0; return; // global path, and object already exists } else { src = tuple[0]; key = path.slice(0, 0-(tuple[1].length+1)); path = tuple[1]; } tuple.length = 0; this.chain(key, path, src); }; // called on the root node of a chain to teardown watcher on the specified // path ChainNodePrototype.remove = function(path) { var obj, tuple, key, src, paths; paths = this._paths; if (paths[path] > 0) { paths[path]--; } obj = this.value(); tuple = normalizeTuple(obj, path); if (tuple[0] === obj) { path = tuple[1]; key = firstKey(path); path = path.slice(key.length+1); } else { src = tuple[0]; key = path.slice(0, 0-(tuple[1].length+1)); path = tuple[1]; } tuple.length = 0; this.unchain(key, path); }; ChainNodePrototype.count = 0; ChainNodePrototype.chain = function(key, path, src) { var chains = this._chains, node; if (!chains) { chains = this._chains = {}; } node = chains[key]; if (!node) { node = chains[key] = new ChainNode(this, key, src); } node.count++; // count chains... // chain rest of path if there is one if (path && path.length>0) { key = firstKey(path); path = path.slice(key.length+1); node.chain(key, path); // NOTE: no src means it will observe changes... } }; ChainNodePrototype.unchain = function(key, path) { var chains = this._chains, node = chains[key]; // unchain rest of path first... if (path && path.length>1) { key = firstKey(path); path = path.slice(key.length+1); node.unchain(key, path); } // delete node if needed. node.count--; if (node.count<=0) { delete chains[node._key]; node.destroy(); } }; ChainNodePrototype.willChange = function() { var chains = this._chains; if (chains) { for(var key in chains) { if (!chains.hasOwnProperty(key)) { continue; } chains[key].willChange(); } } if (this._parent) { this._parent.chainWillChange(this, this._key, 1); } }; ChainNodePrototype.chainWillChange = function(chain, path, depth) { if (this._key) { path = this._key + '.' + path; } if (this._parent) { this._parent.chainWillChange(this, path, depth+1); } else { if (depth > 1) { Ember.propertyWillChange(this.value(), path); } path = 'this.' + path; if (this._paths[path] > 0) { Ember.propertyWillChange(this.value(), path); } } }; ChainNodePrototype.chainDidChange = function(chain, path, depth) { if (this._key) { path = this._key + '.' + path; } if (this._parent) { this._parent.chainDidChange(this, path, depth+1); } else { if (depth > 1) { Ember.propertyDidChange(this.value(), path); } path = 'this.' + path; if (this._paths[path] > 0) { Ember.propertyDidChange(this.value(), path); } } }; ChainNodePrototype.didChange = function(suppressEvent) { // invalidate my own value first. if (this._watching) { var obj = this._parent.value(); if (obj !== this._object) { removeChainWatcher(this._object, this._key, this); this._object = obj; addChainWatcher(obj, this._key, this); } this._value = undefined; // Special-case: the EachProxy relies on immediate evaluation to // establish its observers. if (this._parent && this._parent._key === '@each') this.value(); } // then notify chains... var chains = this._chains; if (chains) { for(var key in chains) { if (!chains.hasOwnProperty(key)) { continue; } chains[key].didChange(suppressEvent); } } if (suppressEvent) { return; } // and finally tell parent about my path changing... if (this._parent) { this._parent.chainDidChange(this, this._key, 1); } }; // get the chains for the current object. If the current object has // chains inherited from the proto they will be cloned and reconfigured for // the current object. function chainsFor(obj) { var m = metaFor(obj), ret = m.chains; if (!ret) { ret = m.chains = new ChainNode(null, null, obj); } else if (ret.value() !== obj) { ret = m.chains = ret.copy(obj); } return ret; } Ember.overrideChains = function(obj, keyName, m) { chainsDidChange(obj, keyName, m, true); }; function chainsWillChange(obj, keyName, m, arg) { if (!m.hasOwnProperty('chainWatchers')) { return; } // nothing to do var nodes = m.chainWatchers; nodes = nodes[keyName]; if (!nodes) { return; } for(var i = 0, l = nodes.length; i < l; i++) { nodes[i].willChange(arg); } } function chainsDidChange(obj, keyName, m, arg) { if (!m.hasOwnProperty('chainWatchers')) { return; } // nothing to do var nodes = m.chainWatchers; nodes = nodes[keyName]; if (!nodes) { return; } // looping in reverse because the chainWatchers array can be modified inside didChange for (var i = nodes.length - 1; i >= 0; i--) { nodes[i].didChange(arg); } } // .......................................................... // WATCH // /** @private Starts watching a property on an object. Whenever the property changes, invokes `Ember.propertyWillChange` and `Ember.propertyDidChange`. This is the primitive used by observers and dependent keys; usually you will never call this method directly but instead use higher level methods like `Ember.addObserver()` @method watch @for Ember @param obj @param {String} keyName */ Ember.watch = function(obj, keyName) { // can't watch length on Array - it is special... if (keyName === 'length' && Ember.typeOf(obj) === 'array') { return this; } var m = metaFor(obj), watching = m.watching, desc; // activate watching first time if (!watching[keyName]) { watching[keyName] = 1; if (isKeyName(keyName)) { desc = m.descs[keyName]; if (desc && desc.willWatch) { desc.willWatch(obj, keyName); } if ('function' === typeof obj.willWatchProperty) { obj.willWatchProperty(keyName); } if (MANDATORY_SETTER && keyName in obj) { m.values[keyName] = obj[keyName]; o_defineProperty(obj, keyName, { configurable: true, enumerable: true, set: Ember.MANDATORY_SETTER_FUNCTION, get: Ember.DEFAULT_GETTER_FUNCTION(keyName) }); } } else { chainsFor(obj).add(keyName); } } else { watching[keyName] = (watching[keyName] || 0) + 1; } return this; }; Ember.isWatching = function isWatching(obj, key) { var meta = obj[META_KEY]; return (meta && meta.watching[key]) > 0; }; Ember.watch.flushPending = flushPendingChains; Ember.unwatch = function(obj, keyName) { // can't watch length on Array - it is special... if (keyName === 'length' && Ember.typeOf(obj) === 'array') { return this; } var m = metaFor(obj), watching = m.watching, desc; if (watching[keyName] === 1) { watching[keyName] = 0; if (isKeyName(keyName)) { desc = m.descs[keyName]; if (desc && desc.didUnwatch) { desc.didUnwatch(obj, keyName); } if ('function' === typeof obj.didUnwatchProperty) { obj.didUnwatchProperty(keyName); } if (MANDATORY_SETTER && keyName in obj) { o_defineProperty(obj, keyName, { configurable: true, enumerable: true, writable: true, value: m.values[keyName] }); delete m.values[keyName]; } } else { chainsFor(obj).remove(keyName); } } else if (watching[keyName]>1) { watching[keyName]--; } return this; }; /** @private Call on an object when you first beget it from another object. This will setup any chained watchers on the object instance as needed. This method is safe to call multiple times. @method rewatch @for Ember @param obj */ Ember.rewatch = function(obj) { var m = metaFor(obj, false), chains = m.chains; // make sure the object has its own guid. if (GUID_KEY in obj && !obj.hasOwnProperty(GUID_KEY)) { Ember.generateGuid(obj, 'ember'); } // make sure any chained watchers update. if (chains && chains.value() !== obj) { m.chains = chains.copy(obj); } return this; }; Ember.finishChains = function(obj) { var m = metaFor(obj, false), chains = m.chains; if (chains) { if (chains.value() !== obj) { m.chains = chains = chains.copy(obj); } chains.didChange(true); } }; // .......................................................... // PROPERTY CHANGES // /** This function is called just before an object property is about to change. It will notify any before observers and prepare caches among other things. Normally you will not need to call this method directly but if for some reason you can't directly watch a property you can invoke this method manually along with `Ember.propertyDidChange()` which you should call just after the property value changes. @method propertyWillChange @for Ember @param {Object} obj The object with the property that will change @param {String} keyName The property key (or path) that will change. @return {void} */ function propertyWillChange(obj, keyName, value) { var m = metaFor(obj, false), watching = m.watching[keyName] > 0 || keyName === 'length', proto = m.proto, desc = m.descs[keyName]; if (!watching) { return; } if (proto === obj) { return; } if (desc && desc.willChange) { desc.willChange(obj, keyName); } dependentKeysWillChange(obj, keyName, m); chainsWillChange(obj, keyName, m); Ember.notifyBeforeObservers(obj, keyName); } Ember.propertyWillChange = propertyWillChange; /** This function is called just after an object property has changed. It will notify any observers and clear caches among other things. Normally you will not need to call this method directly but if for some reason you can't directly watch a property you can invoke this method manually along with `Ember.propertyWilLChange()` which you should call just before the property value changes. @method propertyDidChange @for Ember @param {Object} obj The object with the property that will change @param {String} keyName The property key (or path) that will change. @return {void} */ function propertyDidChange(obj, keyName) { var m = metaFor(obj, false), watching = m.watching[keyName] > 0 || keyName === 'length', proto = m.proto, desc = m.descs[keyName]; if (proto === obj) { return; } // shouldn't this mean that we're watching this key? if (desc && desc.didChange) { desc.didChange(obj, keyName); } if (!watching && keyName !== 'length') { return; } dependentKeysDidChange(obj, keyName, m); chainsDidChange(obj, keyName, m); Ember.notifyObservers(obj, keyName); } Ember.propertyDidChange = propertyDidChange; var NODE_STACK = []; /** Tears down the meta on an object so that it can be garbage collected. Multiple calls will have no effect. @method destroy @for Ember @param {Object} obj the object to destroy @return {void} */ Ember.destroy = function (obj) { var meta = obj[META_KEY], node, nodes, key, nodeObject; if (meta) { obj[META_KEY] = null; // remove chainWatchers to remove circular references that would prevent GC node = meta.chains; if (node) { NODE_STACK.push(node); // process tree while (NODE_STACK.length > 0) { node = NODE_STACK.pop(); // push children nodes = node._chains; if (nodes) { for (key in nodes) { if (nodes.hasOwnProperty(key)) { NODE_STACK.push(nodes[key]); } } } // remove chainWatcher in node object if (node._watching) { nodeObject = node._object; if (nodeObject) { removeChainWatcher(nodeObject, node._key, node); } } } } } }; })(); (function() { /** @module ember-metal */ var get = Ember.get, set = Ember.set, metaFor = Ember.meta, guidFor = Ember.guidFor, a_slice = [].slice, o_create = Ember.create, META_KEY = Ember.META_KEY, watch = Ember.watch, unwatch = Ember.unwatch; // .......................................................... // DEPENDENT KEYS // // data structure: // meta.deps = { // 'depKey': { // 'keyName': count, // } // } /* This function returns a map of unique dependencies for a given object and key. */ function keysForDep(obj, depsMeta, depKey) { var keys = depsMeta[depKey]; if (!keys) { // if there are no dependencies yet for a the given key // create a new empty list of dependencies for the key keys = depsMeta[depKey] = {}; } else if (!depsMeta.hasOwnProperty(depKey)) { // otherwise if the dependency list is inherited from // a superclass, clone the hash keys = depsMeta[depKey] = o_create(keys); } return keys; } /* return obj[META_KEY].deps */ function metaForDeps(obj, meta) { var deps = meta.deps; // If the current object has no dependencies... if (!deps) { // initialize the dependencies with a pointer back to // the current object deps = meta.deps = {}; } else if (!meta.hasOwnProperty('deps')) { // otherwise if the dependencies are inherited from the // object's superclass, clone the deps deps = meta.deps = o_create(deps); } return deps; } function addDependentKeys(desc, obj, keyName, meta) { // the descriptor has a list of dependent keys, so // add all of its dependent keys. var depKeys = desc._dependentKeys, depsMeta, idx, len, depKey, keys; if (!depKeys) return; depsMeta = metaForDeps(obj, meta); for(idx = 0, len = depKeys.length; idx < len; idx++) { depKey = depKeys[idx]; // Lookup keys meta for depKey keys = keysForDep(obj, depsMeta, depKey); // Increment the number of times depKey depends on keyName. keys[keyName] = (keys[keyName] || 0) + 1; // Watch the depKey watch(obj, depKey); } } function removeDependentKeys(desc, obj, keyName, meta) { // the descriptor has a list of dependent keys, so // add all of its dependent keys. var depKeys = desc._dependentKeys, depsMeta, idx, len, depKey, keys; if (!depKeys) return; depsMeta = metaForDeps(obj, meta); for(idx = 0, len = depKeys.length; idx < len; idx++) { depKey = depKeys[idx]; // Lookup keys meta for depKey keys = keysForDep(obj, depsMeta, depKey); // Increment the number of times depKey depends on keyName. keys[keyName] = (keys[keyName] || 0) - 1; // Watch the depKey unwatch(obj, depKey); } } // .......................................................... // COMPUTED PROPERTY // /** @class ComputedProperty @namespace Ember @extends Ember.Descriptor @constructor */ function ComputedProperty(func, opts) { this.func = func; this._cacheable = (opts && opts.cacheable !== undefined) ? opts.cacheable : true; this._dependentKeys = opts && opts.dependentKeys; } Ember.ComputedProperty = ComputedProperty; ComputedProperty.prototype = new Ember.Descriptor(); var ComputedPropertyPrototype = ComputedProperty.prototype; /** Call on a computed property to set it into cacheable mode. When in this mode the computed property will automatically cache the return value of your function until one of the dependent keys changes. ```javascript MyApp.president = Ember.Object.create({ fullName: function() { return this.get('firstName') + ' ' + this.get('lastName'); // After calculating the value of this function, Ember will // return that value without re-executing this function until // one of the dependent properties change. }.property('firstName', 'lastName') }); ``` Properties are cacheable by default. @method cacheable @param {Boolean} aFlag optional set to `false` to disable caching @chainable */ ComputedPropertyPrototype.cacheable = function(aFlag) { this._cacheable = aFlag !== false; return this; }; /** Call on a computed property to set it into non-cached mode. When in this mode the computed property will not automatically cache the return value. ```javascript MyApp.outsideService = Ember.Object.create({ value: function() { return OutsideService.getValue(); }.property().volatile() }); ``` @method volatile @chainable */ ComputedPropertyPrototype.volatile = function() { return this.cacheable(false); }; /** Sets the dependent keys on this computed property. Pass any number of arguments containing key paths that this computed property depends on. ```javascript MyApp.president = Ember.Object.create({ fullName: Ember.computed(function() { return this.get('firstName') + ' ' + this.get('lastName'); // Tell Ember that this computed property depends on firstName // and lastName }).property('firstName', 'lastName') }); ``` @method property @param {String} path* zero or more property paths @chainable */ ComputedPropertyPrototype.property = function() { var args = []; for (var i = 0, l = arguments.length; i < l; i++) { args.push(arguments[i]); } this._dependentKeys = args; return this; }; /** In some cases, you may want to annotate computed properties with additional metadata about how they function or what values they operate on. For example, computed property functions may close over variables that are then no longer available for introspection. You can pass a hash of these values to a computed property like this: ``` person: function() { var personId = this.get('personId'); return App.Person.create({ id: personId }); }.property().meta({ type: App.Person }) ``` The hash that you pass to the `meta()` function will be saved on the computed property descriptor under the `_meta` key. Ember runtime exposes a public API for retrieving these values from classes, via the `metaForProperty()` function. @method meta @param {Hash} meta @chainable */ ComputedPropertyPrototype.meta = function(meta) { if (arguments.length === 0) { return this._meta || {}; } else { this._meta = meta; return this; } }; /* impl descriptor API */ ComputedPropertyPrototype.willWatch = function(obj, keyName) { // watch already creates meta for this instance var meta = obj[META_KEY]; if (!(keyName in meta.cache)) { addDependentKeys(this, obj, keyName, meta); } }; ComputedPropertyPrototype.didUnwatch = function(obj, keyName) { var meta = obj[META_KEY]; if (!(keyName in meta.cache)) { // unwatch already creates meta for this instance removeDependentKeys(this, obj, keyName, meta); } }; /* impl descriptor API */ ComputedPropertyPrototype.didChange = function(obj, keyName) { // _suspended is set via a CP.set to ensure we don't clear // the cached value set by the setter if (this._cacheable && this._suspended !== obj) { var meta = metaFor(obj); if (keyName in meta.cache) { delete meta.cache[keyName]; if (!meta.watching[keyName]) { removeDependentKeys(this, obj, keyName, meta); } } } }; /* impl descriptor API */ ComputedPropertyPrototype.get = function(obj, keyName) { var ret, cache, meta; if (this._cacheable) { meta = metaFor(obj); cache = meta.cache; if (keyName in cache) { return cache[keyName]; } ret = cache[keyName] = this.func.call(obj, keyName); if (!meta.watching[keyName]) { addDependentKeys(this, obj, keyName, meta); } } else { ret = this.func.call(obj, keyName); } return ret; }; /* impl descriptor API */ ComputedPropertyPrototype.set = function(obj, keyName, value) { var cacheable = this._cacheable, func = this.func, meta = metaFor(obj, cacheable), watched = meta.watching[keyName], oldSuspended = this._suspended, hadCachedValue = false, cache = meta.cache, cachedValue, ret; this._suspended = obj; try { if (cacheable && cache.hasOwnProperty(keyName)) { cachedValue = cache[keyName]; hadCachedValue = true; } // Check if the CP has been wrapped if (func.wrappedFunction) { func = func.wrappedFunction; } // For backwards-compatibility with computed properties // that check for arguments.length === 2 to determine if // they are being get or set, only pass the old cached // value if the computed property opts into a third // argument. if (func.length === 3) { ret = func.call(obj, keyName, value, cachedValue); } else if (func.length === 2) { ret = func.call(obj, keyName, value); } else { Ember.defineProperty(obj, keyName, null, cachedValue); Ember.set(obj, keyName, value); return; } if (hadCachedValue && cachedValue === ret) { return; } if (watched) { Ember.propertyWillChange(obj, keyName); } if (hadCachedValue) { delete cache[keyName]; } if (cacheable) { if (!watched && !hadCachedValue) { addDependentKeys(this, obj, keyName, meta); } cache[keyName] = ret; } if (watched) { Ember.propertyDidChange(obj, keyName); } } finally { this._suspended = oldSuspended; } return ret; }; /* called when property is defined */ ComputedPropertyPrototype.setup = function(obj, keyName) { var meta = obj[META_KEY]; if (meta && meta.watching[keyName]) { addDependentKeys(this, obj, keyName, metaFor(obj)); } }; /* called before property is overridden */ ComputedPropertyPrototype.teardown = function(obj, keyName) { var meta = metaFor(obj); if (meta.watching[keyName] || keyName in meta.cache) { removeDependentKeys(this, obj, keyName, meta); } if (this._cacheable) { delete meta.cache[keyName]; } return null; // no value to restore }; /** This helper returns a new property descriptor that wraps the passed computed property function. You can use this helper to define properties with mixins or via `Ember.defineProperty()`. The function you pass will be used to both get and set property values. The function should accept two parameters, key and value. If value is not undefined you should set the value first. In either case return the current value of the property. @method computed @for Ember @param {Function} func The computed property function. @return {Ember.ComputedProperty} property descriptor instance */ Ember.computed = function(func) { var args; if (arguments.length > 1) { args = a_slice.call(arguments, 0, -1); func = a_slice.call(arguments, -1)[0]; } var cp = new ComputedProperty(func); if (args) { cp.property.apply(cp, args); } return cp; }; /** Returns the cached value for a property, if one exists. This can be useful for peeking at the value of a computed property that is generated lazily, without accidentally causing it to be created. @method cacheFor @for Ember @param {Object} obj the object whose property you want to check @param {String} key the name of the property whose cached value you want to return */ Ember.cacheFor = function cacheFor(obj, key) { var cache = metaFor(obj, false).cache; if (cache && key in cache) { return cache[key]; } }; /** @method computed.not @for Ember @param {String} dependentKey */ Ember.computed.not = function(dependentKey) { return Ember.computed(dependentKey, function(key) { return !get(this, dependentKey); }); }; /** @method computed.empty @for Ember @param {String} dependentKey */ Ember.computed.empty = function(dependentKey) { return Ember.computed(dependentKey, function(key) { var val = get(this, dependentKey); return val === undefined || val === null || val === '' || (Ember.isArray(val) && get(val, 'length') === 0); }); }; /** @method computed.bool @for Ember @param {String} dependentKey */ Ember.computed.bool = function(dependentKey) { return Ember.computed(dependentKey, function(key) { return !!get(this, dependentKey); }); }; /** @method computed.alias @for Ember @param {String} dependentKey */ Ember.computed.alias = function(dependentKey) { return Ember.computed(dependentKey, function(key, value){ if (arguments.length === 1) { return get(this, dependentKey); } else { set(this, dependentKey, value); return value; } }); }; })(); (function() { /** @module ember-metal */ var o_create = Ember.create, metaFor = Ember.meta, metaPath = Ember.metaPath, META_KEY = Ember.META_KEY; /* The event system uses a series of nested hashes to store listeners on an object. When a listener is registered, or when an event arrives, these hashes are consulted to determine which target and action pair to invoke. The hashes are stored in the object's meta hash, and look like this: // Object's meta hash { listeners: { // variable name: `listenerSet` "foo:changed": [ // variable name: `actions` [target, method, onceFlag, suspendedFlag] ] } } */ function indexOf(array, target, method) { var index = -1; for (var i = 0, l = array.length; i < l; i++) { if (target === array[i][0] && method === array[i][1]) { index = i; break; } } return index; } function actionsFor(obj, eventName) { var meta = metaFor(obj, true), actions; if (!meta.listeners) { meta.listeners = {}; } if (!meta.hasOwnProperty('listeners')) { // setup inherited copy of the listeners object meta.listeners = o_create(meta.listeners); } actions = meta.listeners[eventName]; // if there are actions, but the eventName doesn't exist in our listeners, then copy them from the prototype if (actions && !meta.listeners.hasOwnProperty(eventName)) { actions = meta.listeners[eventName] = meta.listeners[eventName].slice(); } else if (!actions) { actions = meta.listeners[eventName] = []; } return actions; } function actionsUnion(obj, eventName, otherActions) { var meta = obj[META_KEY], actions = meta && meta.listeners && meta.listeners[eventName]; if (!actions) { return; } for (var i = actions.length - 1; i >= 0; i--) { var target = actions[i][0], method = actions[i][1], once = actions[i][2], suspended = actions[i][3], actionIndex = indexOf(otherActions, target, method); if (actionIndex === -1) { otherActions.push([target, method, once, suspended]); } } } function actionsDiff(obj, eventName, otherActions) { var meta = obj[META_KEY], actions = meta && meta.listeners && meta.listeners[eventName], diffActions = []; if (!actions) { return; } for (var i = actions.length - 1; i >= 0; i--) { var target = actions[i][0], method = actions[i][1], once = actions[i][2], suspended = actions[i][3], actionIndex = indexOf(otherActions, target, method); if (actionIndex !== -1) { continue; } otherActions.push([target, method, once, suspended]); diffActions.push([target, method, once, suspended]); } return diffActions; } /** Add an event listener @method addListener @for Ember @param obj @param {String} eventName @param {Object|Function} targetOrMethod A target object or a function @param {Function|String} method A function or the name of a function to be called on `target` */ function addListener(obj, eventName, target, method, once) { if (!method && 'function' === typeof target) { method = target; target = null; } var actions = actionsFor(obj, eventName), actionIndex = indexOf(actions, target, method); if (actionIndex !== -1) { return; } actions.push([target, method, once, undefined]); if ('function' === typeof obj.didAddListener) { obj.didAddListener(eventName, target, method); } } /** Remove an event listener Arguments should match those passed to {{#crossLink "Ember/addListener"}}{{/crossLink}} @method removeListener @for Ember @param obj @param {String} eventName @param {Object|Function} targetOrMethod A target object or a function @param {Function|String} method A function or the name of a function to be called on `target` */ function removeListener(obj, eventName, target, method) { if (!method && 'function' === typeof target) { method = target; target = null; } function _removeListener(target, method, once) { var actions = actionsFor(obj, eventName), actionIndex = indexOf(actions, target, method); // action doesn't exist, give up silently if (actionIndex === -1) { return; } actions.splice(actionIndex, 1); if ('function' === typeof obj.didRemoveListener) { obj.didRemoveListener(eventName, target, method); } } if (method) { _removeListener(target, method); } else { var meta = obj[META_KEY], actions = meta && meta.listeners && meta.listeners[eventName]; if (!actions) { return; } for (var i = actions.length - 1; i >= 0; i--) { _removeListener(actions[i][0], actions[i][1]); } } } /** @private Suspend listener during callback. This should only be used by the target of the event listener when it is taking an action that would cause the event, e.g. an object might suspend its property change listener while it is setting that property. @method suspendListener @for Ember @param obj @param {String} eventName @param {Object|Function} targetOrMethod A target object or a function @param {Function|String} method A function or the name of a function to be called on `target` @param {Function} callback */ function suspendListener(obj, eventName, target, method, callback) { if (!method && 'function' === typeof target) { method = target; target = null; } var actions = actionsFor(obj, eventName), actionIndex = indexOf(actions, target, method), action; if (actionIndex !== -1) { action = actions[actionIndex].slice(); // copy it, otherwise we're modifying a shared object action[3] = true; // mark the action as suspended actions[actionIndex] = action; // replace the shared object with our copy } function tryable() { return callback.call(target); } function finalizer() { if (action) { action[3] = undefined; } } return Ember.tryFinally(tryable, finalizer); } /** @private Suspend listener during callback. This should only be used by the target of the event listener when it is taking an action that would cause the event, e.g. an object might suspend its property change listener while it is setting that property. @method suspendListener @for Ember @param obj @param {Array} eventName Array of event names @param {Object|Function} targetOrMethod A target object or a function @param {Function|String} method A function or the name of a function to be called on `target` @param {Function} callback */ function suspendListeners(obj, eventNames, target, method, callback) { if (!method && 'function' === typeof target) { method = target; target = null; } var suspendedActions = [], eventName, actions, action, i, l; for (i=0, l=eventNames.length; i= 0; i--) { // looping in reverse for once listeners if (!actions[i] || actions[i][3] === true) { continue; } var target = actions[i][0], method = actions[i][1], once = actions[i][2]; if (once) { removeListener(obj, eventName, target, method); } if (!target) { target = obj; } if ('string' === typeof method) { method = target[method]; } if (params) { method.apply(target, params); } else { method.apply(target); } } return true; } /** @private @method hasListeners @for Ember @param obj @param {String} eventName */ function hasListeners(obj, eventName) { var meta = obj[META_KEY], actions = meta && meta.listeners && meta.listeners[eventName]; return !!(actions && actions.length); } /** @private @method listenersFor @for Ember @param obj @param {String} eventName */ function listenersFor(obj, eventName) { var ret = []; var meta = obj[META_KEY], actions = meta && meta.listeners && meta.listeners[eventName]; if (!actions) { return ret; } for (var i = 0, l = actions.length; i < l; i++) { var target = actions[i][0], method = actions[i][1]; ret.push([target, method]); } return ret; } Ember.addListener = addListener; Ember.removeListener = removeListener; Ember._suspendListener = suspendListener; Ember._suspendListeners = suspendListeners; Ember.sendEvent = sendEvent; Ember.hasListeners = hasListeners; Ember.watchedEvents = watchedEvents; Ember.listenersFor = listenersFor; Ember.listenersDiff = actionsDiff; Ember.listenersUnion = actionsUnion; })(); (function() { // Ember.Logger // Ember.watch.flushPending // Ember.beginPropertyChanges, Ember.endPropertyChanges // Ember.guidFor, Ember.tryFinally /** @module ember-metal */ // .......................................................... // HELPERS // var slice = [].slice, forEach = Ember.ArrayPolyfills.forEach; // invokes passed params - normalizing so you can pass target/func, // target/string or just func function invoke(target, method, args, ignore) { if (method === undefined) { method = target; target = undefined; } if ('string' === typeof method) { method = target[method]; } if (args && ignore > 0) { args = args.length > ignore ? slice.call(args, ignore) : null; } return Ember.handleErrors(function() { // IE8's Function.prototype.apply doesn't accept undefined/null arguments. return method.apply(target || this, args || []); }, this); } // .......................................................... // RUNLOOP // var timerMark; // used by timers... /** Ember RunLoop (Private) @class RunLoop @namespace Ember @private @constructor */ var RunLoop = function(prev) { this._prev = prev || null; this.onceTimers = {}; }; RunLoop.prototype = { /** @method end */ end: function() { this.flush(); }, /** @method prev */ prev: function() { return this._prev; }, // .......................................................... // Delayed Actions // /** @method schedule @param {String} queueName @param target @param method */ schedule: function(queueName, target, method) { var queues = this._queues, queue; if (!queues) { queues = this._queues = {}; } queue = queues[queueName]; if (!queue) { queue = queues[queueName] = []; } var args = arguments.length > 3 ? slice.call(arguments, 3) : null; queue.push({ target: target, method: method, args: args }); return this; }, /** @method flush @param {String} queueName */ flush: function(queueName) { var queueNames, idx, len, queue, log; if (!this._queues) { return this; } // nothing to do function iter(item) { invoke(item.target, item.method, item.args); } function tryable() { forEach.call(queue, iter); } Ember.watch.flushPending(); // make sure all chained watchers are setup if (queueName) { while (this._queues && (queue = this._queues[queueName])) { this._queues[queueName] = null; // the sync phase is to allow property changes to propagate. don't // invoke observers until that is finished. if (queueName === 'sync') { log = Ember.LOG_BINDINGS; if (log) { Ember.Logger.log('Begin: Flush Sync Queue'); } Ember.beginPropertyChanges(); Ember.tryFinally(tryable, Ember.endPropertyChanges); if (log) { Ember.Logger.log('End: Flush Sync Queue'); } } else { forEach.call(queue, iter); } } } else { queueNames = Ember.run.queues; len = queueNames.length; idx = 0; outerloop: while (idx < len) { queueName = queueNames[idx]; queue = this._queues && this._queues[queueName]; delete this._queues[queueName]; if (queue) { // the sync phase is to allow property changes to propagate. don't // invoke observers until that is finished. if (queueName === 'sync') { log = Ember.LOG_BINDINGS; if (log) { Ember.Logger.log('Begin: Flush Sync Queue'); } Ember.beginPropertyChanges(); Ember.tryFinally(tryable, Ember.endPropertyChanges); if (log) { Ember.Logger.log('End: Flush Sync Queue'); } } else { forEach.call(queue, iter); } } // Loop through prior queues for (var i = 0; i <= idx; i++) { if (this._queues && this._queues[queueNames[i]]) { // Start over at the first queue with contents idx = i; continue outerloop; } } idx++; } } timerMark = null; return this; } }; Ember.RunLoop = RunLoop; // .......................................................... // Ember.run - this is ideally the only public API the dev sees // /** Runs the passed target and method inside of a RunLoop, ensuring any deferred actions including bindings and views updates are flushed at the end. Normally you should not need to invoke this method yourself. However if you are implementing raw event handlers when interfacing with other libraries or plugins, you should probably wrap all of your code inside this call. ```javascript Ember.run(function(){ // code to be execute within a RunLoop }); ``` @class run @namespace Ember @static @constructor @param {Object} [target] target of method to call @param {Function|String} method Method to invoke. May be a function or a string. If you pass a string then it will be looked up on the passed target. @param {Object} [args*] Any additional arguments you wish to pass to the method. @return {Object} return value from invoking the passed function. */ Ember.run = function(target, method) { var loop, args = arguments; run.begin(); function tryable() { if (target || method) { return invoke(target, method, args, 2); } } return Ember.tryFinally(tryable, run.end); }; var run = Ember.run; /** Begins a new RunLoop. Any deferred actions invoked after the begin will be buffered until you invoke a matching call to `Ember.run.end()`. This is an lower-level way to use a RunLoop instead of using `Ember.run()`. ```javascript Ember.run.begin(); // code to be execute within a RunLoop Ember.run.end(); ``` @method begin @return {void} */ Ember.run.begin = function() { run.currentRunLoop = new RunLoop(run.currentRunLoop); }; /** Ends a RunLoop. This must be called sometime after you call `Ember.run.begin()` to flush any deferred actions. This is a lower-level way to use a RunLoop instead of using `Ember.run()`. ```javascript Ember.run.begin(); // code to be execute within a RunLoop Ember.run.end(); ``` @method end @return {void} */ Ember.run.end = function() { function tryable() { run.currentRunLoop.end(); } function finalizer() { run.currentRunLoop = run.currentRunLoop.prev(); } Ember.tryFinally(tryable, finalizer); }; /** Array of named queues. This array determines the order in which queues are flushed at the end of the RunLoop. You can define your own queues by simply adding the queue name to this array. Normally you should not need to inspect or modify this property. @property queues @type Array @default ['sync', 'actions', 'destroy', 'timers'] */ Ember.run.queues = ['sync', 'actions', 'destroy', 'timers']; /** Adds the passed target/method and any optional arguments to the named queue to be executed at the end of the RunLoop. If you have not already started a RunLoop when calling this method one will be started for you automatically. At the end of a RunLoop, any methods scheduled in this way will be invoked. Methods will be invoked in an order matching the named queues defined in the `run.queues` property. ```javascript Ember.run.schedule('timers', this, function(){ // this will be executed at the end of the RunLoop, when timers are run console.log("scheduled on timers queue"); }); Ember.run.schedule('sync', this, function(){ // this will be executed at the end of the RunLoop, when bindings are synced console.log("scheduled on sync queue"); }); // Note the functions will be run in order based on the run queues order. Output would be: // scheduled on sync queue // scheduled on timers queue ``` @method schedule @param {String} queue The name of the queue to schedule against. Default queues are 'sync' and 'actions' @param {Object} [target] target object to use as the context when invoking a method. @param {String|Function} method The method to invoke. If you pass a string it will be resolved on the target object at the time the scheduled item is invoked allowing you to change the target function. @param {Object} [arguments*] Optional arguments to be passed to the queued method. @return {void} */ Ember.run.schedule = function(queue, target, method) { var loop = run.autorun(); loop.schedule.apply(loop, arguments); }; var scheduledAutorun; function autorun() { scheduledAutorun = null; if (run.currentRunLoop) { run.end(); } } // Used by global test teardown Ember.run.hasScheduledTimers = function() { return !!(scheduledAutorun || scheduledLater || scheduledNext); }; // Used by global test teardown Ember.run.cancelTimers = function () { if (scheduledAutorun) { clearTimeout(scheduledAutorun); scheduledAutorun = null; } if (scheduledLater) { clearTimeout(scheduledLater); scheduledLater = null; } if (scheduledNext) { clearTimeout(scheduledNext); scheduledNext = null; } timers = {}; }; /** Begins a new RunLoop if necessary and schedules a timer to flush the RunLoop at a later time. This method is used by parts of Ember to ensure the RunLoop always finishes. You normally do not need to call this method directly. Instead use `Ember.run()` @method autorun @example Ember.run.autorun(); @return {Ember.RunLoop} the new current RunLoop */ Ember.run.autorun = function() { if (!run.currentRunLoop) { run.begin(); if (!scheduledAutorun) { scheduledAutorun = setTimeout(autorun, 1); } } return run.currentRunLoop; }; /** Immediately flushes any events scheduled in the 'sync' queue. Bindings use this queue so this method is a useful way to immediately force all bindings in the application to sync. You should call this method anytime you need any changed state to propagate throughout the app immediately without repainting the UI. ```javascript Ember.run.sync(); ``` @method sync @return {void} */ Ember.run.sync = function() { run.autorun(); run.currentRunLoop.flush('sync'); }; // .......................................................... // TIMERS // var timers = {}; // active timers... var scheduledLater; function invokeLaterTimers() { scheduledLater = null; var now = (+ new Date()), earliest = -1; for (var key in timers) { if (!timers.hasOwnProperty(key)) { continue; } var timer = timers[key]; if (timer && timer.expires) { if (now >= timer.expires) { delete timers[key]; invoke(timer.target, timer.method, timer.args, 2); } else { if (earliest<0 || (timer.expires < earliest)) earliest=timer.expires; } } } // schedule next timeout to fire... if (earliest > 0) { scheduledLater = setTimeout(invokeLaterTimers, earliest-(+ new Date())); } } /** Invokes the passed target/method and optional arguments after a specified period if time. The last parameter of this method must always be a number of milliseconds. You should use this method whenever you need to run some action after a period of time instead of using `setTimeout()`. This method will ensure that items that expire during the same script execution cycle all execute together, which is often more efficient than using a real setTimeout. ```javascript Ember.run.later(myContext, function(){ // code here will execute within a RunLoop in about 500ms with this == myContext }, 500); ``` @method later @param {Object} [target] target of method to invoke @param {Function|String} method The method to invoke. If you pass a string it will be resolved on the target at the time the method is invoked. @param {Object} [args*] Optional arguments to pass to the timeout. @param {Number} wait Number of milliseconds to wait. @return {String} a string you can use to cancel the timer in {{#crossLink "Ember/run.cancel"}}{{/crossLink}} later. */ Ember.run.later = function(target, method) { var args, expires, timer, guid, wait; // setTimeout compatibility... if (arguments.length===2 && 'function' === typeof target) { wait = method; method = target; target = undefined; args = [target, method]; } else { args = slice.call(arguments); wait = args.pop(); } expires = (+ new Date()) + wait; timer = { target: target, method: method, expires: expires, args: args }; guid = Ember.guidFor(timer); timers[guid] = timer; run.once(timers, invokeLaterTimers); return guid; }; function invokeOnceTimer(guid, onceTimers) { if (onceTimers[this.tguid]) { delete onceTimers[this.tguid][this.mguid]; } if (timers[guid]) { invoke(this.target, this.method, this.args); } delete timers[guid]; } function scheduleOnce(queue, target, method, args) { var tguid = Ember.guidFor(target), mguid = Ember.guidFor(method), onceTimers = run.autorun().onceTimers, guid = onceTimers[tguid] && onceTimers[tguid][mguid], timer; if (guid && timers[guid]) { timers[guid].args = args; // replace args } else { timer = { target: target, method: method, args: args, tguid: tguid, mguid: mguid }; guid = Ember.guidFor(timer); timers[guid] = timer; if (!onceTimers[tguid]) { onceTimers[tguid] = {}; } onceTimers[tguid][mguid] = guid; // so it isn't scheduled more than once run.schedule(queue, timer, invokeOnceTimer, guid, onceTimers); } return guid; } /** Schedules an item to run one time during the current RunLoop. Calling this method with the same target/method combination will have no effect. Note that although you can pass optional arguments these will not be considered when looking for duplicates. New arguments will replace previous calls. ```javascript Ember.run(function(){ var doFoo = function() { foo(); } Ember.run.once(myContext, doFoo); Ember.run.once(myContext, doFoo); // doFoo will only be executed once at the end of the RunLoop }); ``` @method once @param {Object} [target] target of method to invoke @param {Function|String} method The method to invoke. If you pass a string it will be resolved on the target at the time the method is invoked. @param {Object} [args*] Optional arguments to pass to the timeout. @return {Object} timer */ Ember.run.once = function(target, method) { return scheduleOnce('actions', target, method, slice.call(arguments, 2)); }; Ember.run.scheduleOnce = function(queue, target, method, args) { return scheduleOnce(queue, target, method, slice.call(arguments, 3)); }; var scheduledNext; function invokeNextTimers() { scheduledNext = null; for(var key in timers) { if (!timers.hasOwnProperty(key)) { continue; } var timer = timers[key]; if (timer.next) { delete timers[key]; invoke(timer.target, timer.method, timer.args, 2); } } } /** Schedules an item to run after control has been returned to the system. This is often equivalent to calling `setTimeout(function() {}, 1)`. ```javascript Ember.run.next(myContext, function(){ // code to be executed in the next RunLoop, which will be scheduled after the current one }); ``` @method next @param {Object} [target] target of method to invoke @param {Function|String} method The method to invoke. If you pass a string it will be resolved on the target at the time the method is invoked. @param {Object} [args*] Optional arguments to pass to the timeout. @return {Object} timer */ Ember.run.next = function(target, method) { var guid, timer = { target: target, method: method, args: slice.call(arguments), next: true }; guid = Ember.guidFor(timer); timers[guid] = timer; if (!scheduledNext) { scheduledNext = setTimeout(invokeNextTimers, 1); } return guid; }; /** Cancels a scheduled item. Must be a value returned by `Ember.run.later()`, `Ember.run.once()`, or `Ember.run.next()`. ```javascript var runNext = Ember.run.next(myContext, function(){ // will not be executed }); Ember.run.cancel(runNext); var runLater = Ember.run.later(myContext, function(){ // will not be executed }, 500); Ember.run.cancel(runLater); var runOnce = Ember.run.once(myContext, function(){ // will not be executed }); Ember.run.cancel(runOnce); ``` @method cancel @param {Object} timer Timer object to cancel @return {void} */ Ember.run.cancel = function(timer) { delete timers[timer]; }; })(); (function() { // Ember.Logger // get, set, trySet // guidFor, isArray, meta // addObserver, removeObserver // Ember.run.schedule /** @module ember-metal */ // .......................................................... // CONSTANTS // /** Debug parameter you can turn on. This will log all bindings that fire to the console. This should be disabled in production code. Note that you can also enable this from the console or temporarily. @property LOG_BINDINGS @for Ember @type Boolean @default false */ Ember.LOG_BINDINGS = false || !!Ember.ENV.LOG_BINDINGS; var get = Ember.get, set = Ember.set, guidFor = Ember.guidFor, isGlobalPath = Ember.isGlobalPath; function getWithGlobals(obj, path) { return get(isGlobalPath(path) ? Ember.lookup : obj, path); } // .......................................................... // BINDING // var Binding = function(toPath, fromPath) { this._direction = 'fwd'; this._from = fromPath; this._to = toPath; this._directionMap = Ember.Map.create(); }; /** @class Binding @namespace Ember */ Binding.prototype = { /** This copies the Binding so it can be connected to another object. @method copy @return {Ember.Binding} */ copy: function () { var copy = new Binding(this._to, this._from); if (this._oneWay) { copy._oneWay = true; } return copy; }, // .......................................................... // CONFIG // /** This will set `from` property path to the specified value. It will not attempt to resolve this property path to an actual object until you connect the binding. The binding will search for the property path starting at the root object you pass when you `connect()` the binding. It follows the same rules as `get()` - see that method for more information. @method from @param {String} propertyPath the property path to connect to @return {Ember.Binding} `this` */ from: function(path) { this._from = path; return this; }, /** This will set the `to` property path to the specified value. It will not attempt to resolve this property path to an actual object until you connect the binding. The binding will search for the property path starting at the root object you pass when you `connect()` the binding. It follows the same rules as `get()` - see that method for more information. @method to @param {String|Tuple} propertyPath A property path or tuple @return {Ember.Binding} `this` */ to: function(path) { this._to = path; return this; }, /** Configures the binding as one way. A one-way binding will relay changes on the `from` side to the `to` side, but not the other way around. This means that if you change the `to` side directly, the `from` side may have a different value. @method oneWay @return {Ember.Binding} `this` */ oneWay: function() { this._oneWay = true; return this; }, toString: function() { var oneWay = this._oneWay ? '[oneWay]' : ''; return "Ember.Binding<" + guidFor(this) + ">(" + this._from + " -> " + this._to + ")" + oneWay; }, // .......................................................... // CONNECT AND SYNC // /** Attempts to connect this binding instance so that it can receive and relay changes. This method will raise an exception if you have not set the from/to properties yet. @method connect @param {Object} obj The root object for this binding. @return {Ember.Binding} `this` */ connect: function(obj) { var fromPath = this._from, toPath = this._to; Ember.trySet(obj, toPath, getWithGlobals(obj, fromPath)); // add an observer on the object to be notified when the binding should be updated Ember.addObserver(obj, fromPath, this, this.fromDidChange); // if the binding is a two-way binding, also set up an observer on the target if (!this._oneWay) { Ember.addObserver(obj, toPath, this, this.toDidChange); } this._readyToSync = true; return this; }, /** Disconnects the binding instance. Changes will no longer be relayed. You will not usually need to call this method. @method disconnect @param {Object} obj The root object you passed when connecting the binding. @return {Ember.Binding} `this` */ disconnect: function(obj) { var twoWay = !this._oneWay; // remove an observer on the object so we're no longer notified of // changes that should update bindings. Ember.removeObserver(obj, this._from, this, this.fromDidChange); // if the binding is two-way, remove the observer from the target as well if (twoWay) { Ember.removeObserver(obj, this._to, this, this.toDidChange); } this._readyToSync = false; // disable scheduled syncs... return this; }, // .......................................................... // PRIVATE // /* called when the from side changes */ fromDidChange: function(target) { this._scheduleSync(target, 'fwd'); }, /* called when the to side changes */ toDidChange: function(target) { this._scheduleSync(target, 'back'); }, _scheduleSync: function(obj, dir) { var directionMap = this._directionMap; var existingDir = directionMap.get(obj); // if we haven't scheduled the binding yet, schedule it if (!existingDir) { Ember.run.schedule('sync', this, this._sync, obj); directionMap.set(obj, dir); } // If both a 'back' and 'fwd' sync have been scheduled on the same object, // default to a 'fwd' sync so that it remains deterministic. if (existingDir === 'back' && dir === 'fwd') { directionMap.set(obj, 'fwd'); } }, _sync: function(obj) { var log = Ember.LOG_BINDINGS; // don't synchronize destroyed objects or disconnected bindings if (obj.isDestroyed || !this._readyToSync) { return; } // get the direction of the binding for the object we are // synchronizing from var directionMap = this._directionMap; var direction = directionMap.get(obj); var fromPath = this._from, toPath = this._to; directionMap.remove(obj); // if we're synchronizing from the remote object... if (direction === 'fwd') { var fromValue = getWithGlobals(obj, this._from); if (log) { Ember.Logger.log(' ', this.toString(), '->', fromValue, obj); } if (this._oneWay) { Ember.trySet(obj, toPath, fromValue); } else { Ember._suspendObserver(obj, toPath, this, this.toDidChange, function () { Ember.trySet(obj, toPath, fromValue); }); } // if we're synchronizing *to* the remote object } else if (direction === 'back') { var toValue = get(obj, this._to); if (log) { Ember.Logger.log(' ', this.toString(), '<-', toValue, obj); } Ember._suspendObserver(obj, fromPath, this, this.fromDidChange, function () { Ember.trySet(Ember.isGlobalPath(fromPath) ? Ember.lookup : obj, fromPath, toValue); }); } } }; function mixinProperties(to, from) { for (var key in from) { if (from.hasOwnProperty(key)) { to[key] = from[key]; } } } mixinProperties(Binding, { /** See {{#crossLink "Ember.Binding/from"}}{{/crossLink}} @method from @static */ from: function() { var C = this, binding = new C(); return binding.from.apply(binding, arguments); }, /** See {{#crossLink "Ember.Binding/to"}}{{/crossLink}} @method to @static */ to: function() { var C = this, binding = new C(); return binding.to.apply(binding, arguments); }, /** Creates a new Binding instance and makes it apply in a single direction. A one-way binding will relay changes on the `from` side object (supplied as the `from` argument) the `to` side, but not the other way around. This means that if you change the "to" side directly, the "from" side may have a different value. See {{#crossLink "Binding/oneWay"}}{{/crossLink}} @method oneWay @param {String} from from path. @param {Boolean} [flag] (Optional) passing nothing here will make the binding `oneWay`. You can instead pass `false` to disable `oneWay`, making the binding two way again. */ oneWay: function(from, flag) { var C = this, binding = new C(null, from); return binding.oneWay(flag); } }); /** An `Ember.Binding` connects the properties of two objects so that whenever the value of one property changes, the other property will be changed also. ## Automatic Creation of Bindings with `/^*Binding/`-named Properties You do not usually create Binding objects directly but instead describe bindings in your class or object definition using automatic binding detection. Properties ending in a `Binding` suffix will be converted to `Ember.Binding` instances. The value of this property should be a string representing a path to another object or a custom binding instanced created using Binding helpers (see "Customizing Your Bindings"): ``` valueBinding: "MyApp.someController.title" ``` This will create a binding from `MyApp.someController.title` to the `value` property of your object instance automatically. Now the two values will be kept in sync. ## One Way Bindings One especially useful binding customization you can use is the `oneWay()` helper. This helper tells Ember that you are only interested in receiving changes on the object you are binding from. For example, if you are binding to a preference and you want to be notified if the preference has changed, but your object will not be changing the preference itself, you could do: ``` bigTitlesBinding: Ember.Binding.oneWay("MyApp.preferencesController.bigTitles") ``` This way if the value of `MyApp.preferencesController.bigTitles` changes the `bigTitles` property of your object will change also. However, if you change the value of your `bigTitles` property, it will not update the `preferencesController`. One way bindings are almost twice as fast to setup and twice as fast to execute because the binding only has to worry about changes to one side. You should consider using one way bindings anytime you have an object that may be created frequently and you do not intend to change a property; only to monitor it for changes. (such as in the example above). ## Adding Bindings Manually All of the examples above show you how to configure a custom binding, but the result of these customizations will be a binding template, not a fully active Binding instance. The binding will actually become active only when you instantiate the object the binding belongs to. It is useful however, to understand what actually happens when the binding is activated. For a binding to function it must have at least a `from` property and a `to` property. The `from` property path points to the object/key that you want to bind from while the `to` path points to the object/key you want to bind to. When you define a custom binding, you are usually describing the property you want to bind from (such as `MyApp.someController.value` in the examples above). When your object is created, it will automatically assign the value you want to bind `to` based on the name of your binding key. In the examples above, during init, Ember objects will effectively call something like this on your binding: ```javascript binding = Ember.Binding.from(this.valueBinding).to("value"); ``` This creates a new binding instance based on the template you provide, and sets the to path to the `value` property of the new object. Now that the binding is fully configured with a `from` and a `to`, it simply needs to be connected to become active. This is done through the `connect()` method: ```javascript binding.connect(this); ``` Note that when you connect a binding you pass the object you want it to be connected to. This object will be used as the root for both the from and to side of the binding when inspecting relative paths. This allows the binding to be automatically inherited by subclassed objects as well. Now that the binding is connected, it will observe both the from and to side and relay changes. If you ever needed to do so (you almost never will, but it is useful to understand this anyway), you could manually create an active binding by using the `Ember.bind()` helper method. (This is the same method used by to setup your bindings on objects): ```javascript Ember.bind(MyApp.anotherObject, "value", "MyApp.someController.value"); ``` Both of these code fragments have the same effect as doing the most friendly form of binding creation like so: ```javascript MyApp.anotherObject = Ember.Object.create({ valueBinding: "MyApp.someController.value", // OTHER CODE FOR THIS OBJECT... }); ``` Ember's built in binding creation method makes it easy to automatically create bindings for you. You should always use the highest-level APIs available, even if you understand how it works underneath. @class Binding @namespace Ember @since Ember 0.9 */ Ember.Binding = Binding; /** Global helper method to create a new binding. Just pass the root object along with a `to` and `from` path to create and connect the binding. @method bind @for Ember @param {Object} obj The root object of the transform. @param {String} to The path to the 'to' side of the binding. Must be relative to obj. @param {String} from The path to the 'from' side of the binding. Must be relative to obj or a global path. @return {Ember.Binding} binding instance */ Ember.bind = function(obj, to, from) { return new Ember.Binding(to, from).connect(obj); }; /** @method oneWay @for Ember @param {Object} obj The root object of the transform. @param {String} to The path to the 'to' side of the binding. Must be relative to obj. @param {String} from The path to the 'from' side of the binding. Must be relative to obj or a global path. @return {Ember.Binding} binding instance */ Ember.oneWay = function(obj, to, from) { return new Ember.Binding(to, from).oneWay().connect(obj); }; })(); (function() { /** @module ember-metal */ var Mixin, REQUIRED, Alias, a_map = Ember.ArrayPolyfills.map, a_indexOf = Ember.ArrayPolyfills.indexOf, a_forEach = Ember.ArrayPolyfills.forEach, a_slice = [].slice, EMPTY_META = {}, // dummy for non-writable meta o_create = Ember.create, defineProperty = Ember.defineProperty, guidFor = Ember.guidFor; function mixinsMeta(obj) { var m = Ember.meta(obj, true), ret = m.mixins; if (!ret) { ret = m.mixins = {}; } else if (!m.hasOwnProperty('mixins')) { ret = m.mixins = o_create(ret); } return ret; } function initMixin(mixin, args) { if (args && args.length > 0) { mixin.mixins = a_map.call(args, function(x) { if (x instanceof Mixin) { return x; } // Note: Manually setup a primitive mixin here. This is the only // way to actually get a primitive mixin. This way normal creation // of mixins will give you combined mixins... var mixin = new Mixin(); mixin.properties = x; return mixin; }); } return mixin; } function isMethod(obj) { return 'function' === typeof obj && obj.isMethod !== false && obj !== Boolean && obj !== Object && obj !== Number && obj !== Array && obj !== Date && obj !== String; } var CONTINUE = {}; function mixinProperties(mixinsMeta, mixin) { var guid; if (mixin instanceof Mixin) { guid = guidFor(mixin); if (mixinsMeta[guid]) { return CONTINUE; } mixinsMeta[guid] = mixin; return mixin.properties; } else { return mixin; // apply anonymous mixin properties } } function concatenatedProperties(props, values, base) { var concats; // reset before adding each new mixin to pickup concats from previous concats = values.concatenatedProperties || base.concatenatedProperties; if (props.concatenatedProperties) { concats = concats ? concats.concat(props.concatenatedProperties) : props.concatenatedProperties; } return concats; } function giveDescriptorSuper(meta, key, property, values, descs) { var superProperty; // Computed properties override methods, and do not call super to them if (values[key] === undefined) { // Find the original descriptor in a parent mixin superProperty = descs[key]; } // If we didn't find the original descriptor in a parent mixin, find // it on the original object. superProperty = superProperty || meta.descs[key]; if (!superProperty || !(superProperty instanceof Ember.ComputedProperty)) { return property; } // Since multiple mixins may inherit from the same parent, we need // to clone the computed property so that other mixins do not receive // the wrapped version. property = o_create(property); property.func = Ember.wrap(property.func, superProperty.func); return property; } function giveMethodSuper(obj, key, method, values, descs) { var superMethod; // Methods overwrite computed properties, and do not call super to them. if (descs[key] === undefined) { // Find the original method in a parent mixin superMethod = values[key]; } // If we didn't find the original value in a parent mixin, find it in // the original object superMethod = superMethod || obj[key]; // Only wrap the new method if the original method was a function if ('function' !== typeof superMethod) { return method; } return Ember.wrap(method, superMethod); } function applyConcatenatedProperties(obj, key, value, values) { var baseValue = values[key] || obj[key]; if (baseValue) { if ('function' === typeof baseValue.concat) { return baseValue.concat(value); } else { return Ember.makeArray(baseValue).concat(value); } } else { return Ember.makeArray(value); } } function addNormalizedProperty(base, key, value, meta, descs, values, concats) { if (value instanceof Ember.Descriptor) { if (value === REQUIRED && descs[key]) { return CONTINUE; } // Wrap descriptor function to implement // _super() if needed if (value.func) { value = giveDescriptorSuper(meta, key, value, values, descs); } descs[key] = value; values[key] = undefined; } else { // impl super if needed... if (isMethod(value)) { value = giveMethodSuper(base, key, value, values, descs); } else if ((concats && a_indexOf.call(concats, key) >= 0) || key === 'concatenatedProperties') { value = applyConcatenatedProperties(base, key, value, values); } descs[key] = undefined; values[key] = value; } } function mergeMixins(mixins, m, descs, values, base) { var mixin, props, key, concats, meta; function removeKeys(keyName) { delete descs[keyName]; delete values[keyName]; } for(var i=0, l=mixins.length; i= 0) { if (_detect(mixins[loc], targetMixin, seen)) { return true; } } return false; } /** @method detect @param obj @return {Boolean} */ MixinPrototype.detect = function(obj) { if (!obj) { return false; } if (obj instanceof Mixin) { return _detect(obj, this, {}); } var mixins = Ember.meta(obj, false).mixins; if (mixins) { return !!mixins[guidFor(this)]; } return false; }; MixinPrototype.without = function() { var ret = new Mixin(this); ret._without = a_slice.call(arguments); return ret; }; function _keys(ret, mixin, seen) { if (seen[guidFor(mixin)]) { return; } seen[guidFor(mixin)] = true; if (mixin.properties) { var props = mixin.properties; for (var key in props) { if (props.hasOwnProperty(key)) { ret[key] = true; } } } else if (mixin.mixins) { a_forEach.call(mixin.mixins, function(x) { _keys(ret, x, seen); }); } } MixinPrototype.keys = function() { var keys = {}, seen = {}, ret = []; _keys(keys, this, seen); for(var key in keys) { if (keys.hasOwnProperty(key)) { ret.push(key); } } return ret; }; // returns the mixins currently applied to the specified object // TODO: Make Ember.mixin Mixin.mixins = function(obj) { var mixins = Ember.meta(obj, false).mixins, ret = []; if (!mixins) { return ret; } for (var key in mixins) { var mixin = mixins[key]; // skip primitive mixins since these are always anonymous if (!mixin.properties) { ret.push(mixin); } } return ret; }; REQUIRED = new Ember.Descriptor(); REQUIRED.toString = function() { return '(Required Property)'; }; /** Denotes a required property for a mixin @method required @for Ember */ Ember.required = function() { return REQUIRED; }; Alias = function(methodName) { this.methodName = methodName; }; Alias.prototype = new Ember.Descriptor(); /** Makes a property or method available via an additional name. ```javascript App.PaintSample = Ember.Object.extend({ color: 'red', colour: Ember.alias('color'), name: function(){ return "Zed"; }, moniker: Ember.alias("name") }); var paintSample = App.PaintSample.create() paintSample.get('colour'); // 'red' paintSample.moniker(); // 'Zed' ``` @method alias @for Ember @param {String} methodName name of the method or property to alias @return {Ember.Descriptor} @deprecated Use `Ember.aliasMethod` or `Ember.computed.alias` instead */ Ember.alias = function(methodName) { return new Alias(methodName); }; Ember.deprecateFunc("Ember.alias is deprecated. Please use Ember.aliasMethod or Ember.computed.alias instead.", Ember.alias); /** Makes a method available via an additional name. ```javascript App.Person = Ember.Object.extend({ name: function(){ return 'Tomhuda Katzdale'; }, moniker: Ember.aliasMethod('name') }); var goodGuy = App.Person.create() ``` @method aliasMethod @for Ember @param {String} methodName name of the method to alias @return {Ember.Descriptor} */ Ember.aliasMethod = function(methodName) { return new Alias(methodName); }; // .......................................................... // OBSERVER HELPER // /** @method observer @for Ember @param {Function} func @param {String} propertyNames* @return func */ Ember.observer = function(func) { var paths = a_slice.call(arguments, 1); func.__ember_observes__ = paths; return func; }; // If observers ever become asynchronous, Ember.immediateObserver // must remain synchronous. /** @method immediateObserver @for Ember @param {Function} func @param {String} propertyNames* @return func */ Ember.immediateObserver = function() { for (var i=0, l=arguments.length; i w. */ Ember.compare = function compare(v, w) { if (v === w) { return 0; } var type1 = Ember.typeOf(v); var type2 = Ember.typeOf(w); var Comparable = Ember.Comparable; if (Comparable) { if (type1==='instance' && Comparable.detect(v.constructor)) { return v.constructor.compare(v, w); } if (type2 === 'instance' && Comparable.detect(w.constructor)) { return 1-w.constructor.compare(w, v); } } // If we haven't yet generated a reverse-mapping of Ember.ORDER_DEFINITION, // do so now. var mapping = Ember.ORDER_DEFINITION_MAPPING; if (!mapping) { var order = Ember.ORDER_DEFINITION; mapping = Ember.ORDER_DEFINITION_MAPPING = {}; var idx, len; for (idx = 0, len = order.length; idx < len; ++idx) { mapping[order[idx]] = idx; } // We no longer need Ember.ORDER_DEFINITION. delete Ember.ORDER_DEFINITION; } var type1Index = mapping[type1]; var type2Index = mapping[type2]; if (type1Index < type2Index) { return -1; } if (type1Index > type2Index) { return 1; } // types are equal - so we have to check values now switch (type1) { case 'boolean': case 'number': if (v < w) { return -1; } if (v > w) { return 1; } return 0; case 'string': var comp = v.localeCompare(w); if (comp < 0) { return -1; } if (comp > 0) { return 1; } return 0; case 'array': var vLen = v.length; var wLen = w.length; var l = Math.min(vLen, wLen); var r = 0; var i = 0; while (r === 0 && i < l) { r = compare(v[i],w[i]); i++; } if (r !== 0) { return r; } // all elements are equal now // shorter array should be ordered first if (vLen < wLen) { return -1; } if (vLen > wLen) { return 1; } // arrays are equal now return 0; case 'instance': if (Ember.Comparable && Ember.Comparable.detect(v)) { return v.compare(v, w); } return 0; case 'date': var vNum = v.getTime(); var wNum = w.getTime(); if (vNum < wNum) { return -1; } if (vNum > wNum) { return 1; } return 0; default: return 0; } }; function _copy(obj, deep, seen, copies) { var ret, loc, key; // primitive data types are immutable, just return them. if ('object' !== typeof obj || obj===null) return obj; // avoid cyclical loops if (deep && (loc=indexOf(seen, obj))>=0) return copies[loc]; // IMPORTANT: this specific test will detect a native array only. Any other // object will need to implement Copyable. if (Ember.typeOf(obj) === 'array') { ret = obj.slice(); if (deep) { loc = ret.length; while(--loc>=0) ret[loc] = _copy(ret[loc], deep, seen, copies); } } else if (Ember.Copyable && Ember.Copyable.detect(obj)) { ret = obj.copy(deep, seen, copies); } else { ret = {}; for(key in obj) { if (!obj.hasOwnProperty(key)) continue; // Prevents browsers that don't respect non-enumerability from // copying internal Ember properties if (key.substring(0,2) === '__') continue; ret[key] = deep ? _copy(obj[key], deep, seen, copies) : obj[key]; } } if (deep) { seen.push(obj); copies.push(ret); } return ret; } /** Creates a clone of the passed object. This function can take just about any type of object and create a clone of it, including primitive values (which are not actually cloned because they are immutable). If the passed object implements the `clone()` method, then this function will simply call that method and return the result. @method copy @for Ember @param {Object} object The object to clone @param {Boolean} deep If true, a deep copy of the object is made @return {Object} The cloned object */ Ember.copy = function(obj, deep) { // fast paths if ('object' !== typeof obj || obj===null) return obj; // can't copy primitives if (Ember.Copyable && Ember.Copyable.detect(obj)) return obj.copy(deep); return _copy(obj, deep, deep ? [] : null, deep ? [] : null); }; /** Convenience method to inspect an object. This method will attempt to convert the object into a useful string description. It is a pretty simple implementation. If you want something more robust, use something like JSDump: https://github.com/NV/jsDump @method inspect @for Ember @param {Object} obj The object you want to inspect. @return {String} A description of the object */ Ember.inspect = function(obj) { if (typeof obj !== 'object' || obj === null) { return obj + ''; } var v, ret = []; for(var key in obj) { if (obj.hasOwnProperty(key)) { v = obj[key]; if (v === 'toString') { continue; } // ignore useless items if (Ember.typeOf(v) === 'function') { v = "function() { ... }"; } ret.push(key + ": " + v); } } return "{" + ret.join(", ") + "}"; }; /** Compares two objects, returning true if they are logically equal. This is a deeper comparison than a simple triple equal. For sets it will compare the internal objects. For any other object that implements `isEqual()` it will respect that method. ```javascript Ember.isEqual('hello', 'hello'); // true Ember.isEqual(1, 2); // false Ember.isEqual([4,2], [4,2]); // false ``` @method isEqual @for Ember @param {Object} a first object to compare @param {Object} b second object to compare @return {Boolean} */ Ember.isEqual = function(a, b) { if (a && 'function'===typeof a.isEqual) return a.isEqual(b); return a === b; }; // Used by Ember.compare Ember.ORDER_DEFINITION = Ember.ENV.ORDER_DEFINITION || [ 'undefined', 'null', 'boolean', 'number', 'string', 'array', 'object', 'instance', 'function', 'class', 'date' ]; /** Returns all of the keys defined on an object or hash. This is useful when inspecting objects for debugging. On browsers that support it, this uses the native `Object.keys` implementation. @method keys @for Ember @param {Object} obj @return {Array} Array containing keys of obj */ Ember.keys = Object.keys; if (!Ember.keys) { Ember.keys = function(obj) { var ret = []; for(var key in obj) { if (obj.hasOwnProperty(key)) { ret.push(key); } } return ret; }; } // .......................................................... // ERROR // var errorProps = ['description', 'fileName', 'lineNumber', 'message', 'name', 'number', 'stack']; /** A subclass of the JavaScript Error object for use in Ember. @class Error @namespace Ember @extends Error @constructor */ Ember.Error = function() { var tmp = Error.prototype.constructor.apply(this, arguments); // Unfortunately errors are not enumerable in Chrome (at least), so `for prop in tmp` doesn't work. for (var idx = 0; idx < errorProps.length; idx++) { this[errorProps[idx]] = tmp[errorProps[idx]]; } }; Ember.Error.prototype = Ember.create(Error.prototype); })(); (function() { /** @module ember @submodule ember-runtime */ var STRING_DASHERIZE_REGEXP = (/[ _]/g); var STRING_DASHERIZE_CACHE = {}; var STRING_DECAMELIZE_REGEXP = (/([a-z])([A-Z])/g); var STRING_CAMELIZE_REGEXP = (/(\-|_|\.|\s)+(.)?/g); var STRING_UNDERSCORE_REGEXP_1 = (/([a-z\d])([A-Z]+)/g); var STRING_UNDERSCORE_REGEXP_2 = (/\-|\s+/g); /** Defines the hash of localized strings for the current language. Used by the `Ember.String.loc()` helper. To localize, add string values to this hash. @property STRINGS @for Ember @type Hash */ Ember.STRINGS = {}; /** Defines string helper methods including string formatting and localization. Unless `Ember.EXTEND_PROTOTYPES.String` is `false` these methods will also be added to the `String.prototype` as well. @class String @namespace Ember @static */ Ember.String = { /** Apply formatting options to the string. This will look for occurrences of "%@" in your string and substitute them with the arguments you pass into this method. If you want to control the specific order of replacement, you can add a number after the key as well to indicate which argument you want to insert. Ordered insertions are most useful when building loc strings where values you need to insert may appear in different orders. ```javascript "Hello %@ %@".fmt('John', 'Doe'); // "Hello John Doe" "Hello %@2, %@1".fmt('John', 'Doe'); // "Hello Doe, John" ``` @method fmt @param {Object...} [args] @return {String} formatted string */ fmt: function(str, formats) { // first, replace any ORDERED replacements. var idx = 0; // the current index for non-numerical replacements return str.replace(/%@([0-9]+)?/g, function(s, argIndex) { argIndex = (argIndex) ? parseInt(argIndex,0) - 1 : idx++ ; s = formats[argIndex]; return ((s === null) ? '(null)' : (s === undefined) ? '' : s).toString(); }) ; }, /** Formats the passed string, but first looks up the string in the localized strings hash. This is a convenient way to localize text. See `Ember.String.fmt()` for more information on formatting. Note that it is traditional but not required to prefix localized string keys with an underscore or other character so you can easily identify localized strings. ```javascript Ember.STRINGS = { '_Hello World': 'Bonjour le monde', '_Hello %@ %@': 'Bonjour %@ %@' }; Ember.String.loc("_Hello World"); // 'Bonjour le monde'; Ember.String.loc("_Hello %@ %@", ["John", "Smith"]); // "Bonjour John Smith"; ``` @method loc @param {String} str The string to format @param {Array} formats Optional array of parameters to interpolate into string. @return {String} formatted string */ loc: function(str, formats) { str = Ember.STRINGS[str] || str; return Ember.String.fmt(str, formats) ; }, /** Splits a string into separate units separated by spaces, eliminating any empty strings in the process. This is a convenience method for split that is mostly useful when applied to the `String.prototype`. ```javascript Ember.String.w("alpha beta gamma").forEach(function(key) { console.log(key); }); // > alpha // > beta // > gamma ``` @method w @param {String} str The string to split @return {String} split string */ w: function(str) { return str.split(/\s+/); }, /** Converts a camelized string into all lower case separated by underscores. ```javascript 'innerHTML'.decamelize(); // 'inner_html' 'action_name'.decamelize(); // 'action_name' 'css-class-name'.decamelize(); // 'css-class-name' 'my favorite items'.decamelize(); // 'my favorite items' ``` @method decamelize @param {String} str The string to decamelize. @return {String} the decamelized string. */ decamelize: function(str) { return str.replace(STRING_DECAMELIZE_REGEXP, '$1_$2').toLowerCase(); }, /** Replaces underscores or spaces with dashes. ```javascript 'innerHTML'.dasherize(); // 'inner-html' 'action_name'.dasherize(); // 'action-name' 'css-class-name'.dasherize(); // 'css-class-name' 'my favorite items'.dasherize(); // 'my-favorite-items' ``` @method dasherize @param {String} str The string to dasherize. @return {String} the dasherized string. */ dasherize: function(str) { var cache = STRING_DASHERIZE_CACHE, ret = cache[str]; if (ret) { return ret; } else { ret = Ember.String.decamelize(str).replace(STRING_DASHERIZE_REGEXP,'-'); cache[str] = ret; } return ret; }, /** Returns the lowerCaseCamel form of a string. ```javascript 'innerHTML'.camelize(); // 'innerHTML' 'action_name'.camelize(); // 'actionName' 'css-class-name'.camelize(); // 'cssClassName' 'my favorite items'.camelize(); // 'myFavoriteItems' ``` @method camelize @param {String} str The string to camelize. @return {String} the camelized string. */ camelize: function(str) { return str.replace(STRING_CAMELIZE_REGEXP, function(match, separator, chr) { return chr ? chr.toUpperCase() : ''; }); }, /** Returns the UpperCamelCase form of a string. ```javascript 'innerHTML'.classify(); // 'InnerHTML' 'action_name'.classify(); // 'ActionName' 'css-class-name'.classify(); // 'CssClassName' 'my favorite items'.classify(); // 'MyFavoriteItems' ``` @method classify @param {String} str the string to classify @return {String} the classified string */ classify: function(str) { var parts = str.split("."), out = []; for (var i=0, l=parts.length; i 'InnerHTML' 'action_name'.capitalize() => 'Action_name' 'css-class-name'.capitalize() => 'Css-class-name' 'my favorite items'.capitalize() => 'My favorite items' @method capitalize @param {String} str @return {String} */ capitalize: function(str) { return str.charAt(0).toUpperCase() + str.substr(1); } }; })(); (function() { /** @module ember @submodule ember-runtime */ var fmt = Ember.String.fmt, w = Ember.String.w, loc = Ember.String.loc, camelize = Ember.String.camelize, decamelize = Ember.String.decamelize, dasherize = Ember.String.dasherize, underscore = Ember.String.underscore, capitalize = Ember.String.capitalize, classify = Ember.String.classify; if (Ember.EXTEND_PROTOTYPES === true || Ember.EXTEND_PROTOTYPES.String) { /** See {{#crossLink "Ember.String/fmt"}}{{/crossLink}} @method fmt @for String */ String.prototype.fmt = function() { return fmt(this, arguments); }; /** See {{#crossLink "Ember.String/w"}}{{/crossLink}} @method w @for String */ String.prototype.w = function() { return w(this); }; /** See {{#crossLink "Ember.String/loc"}}{{/crossLink}} @method loc @for String */ String.prototype.loc = function() { return loc(this, arguments); }; /** See {{#crossLink "Ember.String/camelize"}}{{/crossLink}} @method camelize @for String */ String.prototype.camelize = function() { return camelize(this); }; /** See {{#crossLink "Ember.String/decamelize"}}{{/crossLink}} @method decamelize @for String */ String.prototype.decamelize = function() { return decamelize(this); }; /** See {{#crossLink "Ember.String/dasherize"}}{{/crossLink}} @method dasherize @for String */ String.prototype.dasherize = function() { return dasherize(this); }; /** See {{#crossLink "Ember.String/underscore"}}{{/crossLink}} @method underscore @for String */ String.prototype.underscore = function() { return underscore(this); }; /** See {{#crossLink "Ember.String/classify"}}{{/crossLink}} @method classify @for String */ String.prototype.classify = function() { return classify(this); }; /** See {{#crossLink "Ember.String/capitalize"}}{{/crossLink}} @method capitalize @for String */ String.prototype.capitalize = function() { return capitalize(this); }; } })(); (function() { /** @module ember @submodule ember-runtime */ var a_slice = Array.prototype.slice; if (Ember.EXTEND_PROTOTYPES === true || Ember.EXTEND_PROTOTYPES.Function) { /** The `property` extension of Javascript's Function prototype is available when `Ember.EXTEND_PROTOTYPES` or `Ember.EXTEND_PROTOTYPES.Function` is `true`, which is the default. Computed properties allow you to treat a function like a property: ```javascript MyApp.president = Ember.Object.create({ firstName: "Barack", lastName: "Obama", fullName: function() { return this.get('firstName') + ' ' + this.get('lastName'); // Call this flag to mark the function as a property }.property() }); MyApp.president.get('fullName'); // "Barack Obama" ``` Treating a function like a property is useful because they can work with bindings, just like any other property. Many computed properties have dependencies on other properties. For example, in the above example, the `fullName` property depends on `firstName` and `lastName` to determine its value. You can tell Ember about these dependencies like this: ```javascript MyApp.president = Ember.Object.create({ firstName: "Barack", lastName: "Obama", fullName: function() { return this.get('firstName') + ' ' + this.get('lastName'); // Tell Ember.js that this computed property depends on firstName // and lastName }.property('firstName', 'lastName') }); ``` Make sure you list these dependencies so Ember knows when to update bindings that connect to a computed property. Changing a dependency will not immediately trigger an update of the computed property, but will instead clear the cache so that it is updated when the next `get` is called on the property. See {{#crossLink "Ember.ComputedProperty"}}{{/crossLink}}, {{#crossLink "Ember/computed"}}{{/crossLink}} @method property @for Function */ Function.prototype.property = function() { var ret = Ember.computed(this); return ret.property.apply(ret, arguments); }; /** The `observes` extension of Javascript's Function prototype is available when `Ember.EXTEND_PROTOTYPES` or `Ember.EXTEND_PROTOTYPES.Function` is true, which is the default. You can observe property changes simply by adding the `observes` call to the end of your method declarations in classes that you write. For example: ```javascript Ember.Object.create({ valueObserver: function() { // Executes whenever the "value" property changes }.observes('value') }); ``` See {{#crossLink "Ember.Observable/observes"}}{{/crossLink}} @method observes @for Function */ Function.prototype.observes = function() { this.__ember_observes__ = a_slice.call(arguments); return this; }; /** The `observesBefore` extension of Javascript's Function prototype is available when `Ember.EXTEND_PROTOTYPES` or `Ember.EXTEND_PROTOTYPES.Function` is true, which is the default. You can get notified when a property changes is about to happen by by adding the `observesBefore` call to the end of your method declarations in classes that you write. For example: ```javascript Ember.Object.create({ valueObserver: function() { // Executes whenever the "value" property is about to change }.observesBefore('value') }); ``` See {{#crossLink "Ember.Observable/observesBefore"}}{{/crossLink}} @method observesBefore @for Function */ Function.prototype.observesBefore = function() { this.__ember_observesBefore__ = a_slice.call(arguments); return this; }; } })(); (function() { })(); (function() { /** @module ember @submodule ember-runtime */ // .......................................................... // HELPERS // var get = Ember.get, set = Ember.set; var a_slice = Array.prototype.slice; var a_indexOf = Ember.EnumerableUtils.indexOf; var contexts = []; function popCtx() { return contexts.length===0 ? {} : contexts.pop(); } function pushCtx(ctx) { contexts.push(ctx); return null; } function iter(key, value) { var valueProvided = arguments.length === 2; function i(item) { var cur = get(item, key); return valueProvided ? value===cur : !!cur; } return i ; } /** This mixin defines the common interface implemented by enumerable objects in Ember. Most of these methods follow the standard Array iteration API defined up to JavaScript 1.8 (excluding language-specific features that cannot be emulated in older versions of JavaScript). This mixin is applied automatically to the Array class on page load, so you can use any of these methods on simple arrays. If Array already implements one of these methods, the mixin will not override them. ## Writing Your Own Enumerable To make your own custom class enumerable, you need two items: 1. You must have a length property. This property should change whenever the number of items in your enumerable object changes. If you using this with an `Ember.Object` subclass, you should be sure to change the length property using `set().` 2. If you must implement `nextObject().` See documentation. Once you have these two methods implement, apply the `Ember.Enumerable` mixin to your class and you will be able to enumerate the contents of your object like any other collection. ## Using Ember Enumeration with Other Libraries Many other libraries provide some kind of iterator or enumeration like facility. This is often where the most common API conflicts occur. Ember's API is designed to be as friendly as possible with other libraries by implementing only methods that mostly correspond to the JavaScript 1.8 API. @class Enumerable @namespace Ember @extends Ember.Mixin @since Ember 0.9 */ Ember.Enumerable = Ember.Mixin.create( /** @scope Ember.Enumerable.prototype */ { // compatibility isEnumerable: true, /** Implement this method to make your class enumerable. This method will be call repeatedly during enumeration. The index value will always begin with 0 and increment monotonically. You don't have to rely on the index value to determine what object to return, but you should always check the value and start from the beginning when you see the requested index is 0. The `previousObject` is the object that was returned from the last call to `nextObject` for the current iteration. This is a useful way to manage iteration if you are tracing a linked list, for example. Finally the context parameter will always contain a hash you can use as a "scratchpad" to maintain any other state you need in order to iterate properly. The context object is reused and is not reset between iterations so make sure you setup the context with a fresh state whenever the index parameter is 0. Generally iterators will continue to call `nextObject` until the index reaches the your current length-1. If you run out of data before this time for some reason, you should simply return undefined. The default implementation of this method simply looks up the index. This works great on any Array-like objects. @method nextObject @param {Number} index the current index of the iteration @param {Object} previousObject the value returned by the last call to `nextObject`. @param {Object} context a context object you can use to maintain state. @return {Object} the next object in the iteration or undefined */ nextObject: Ember.required(Function), /** Helper method returns the first object from a collection. This is usually used by bindings and other parts of the framework to extract a single object if the enumerable contains only one item. If you override this method, you should implement it so that it will always return the same value each time it is called. If your enumerable contains only one object, this method should always return that object. If your enumerable is empty, this method should return `undefined`. ```javascript var arr = ["a", "b", "c"]; arr.firstObject(); // "a" var arr = []; arr.firstObject(); // undefined ``` @property firstObject @return {Object} the object or undefined */ firstObject: Ember.computed(function() { if (get(this, 'length')===0) return undefined ; // handle generic enumerables var context = popCtx(), ret; ret = this.nextObject(0, null, context); pushCtx(context); return ret ; }).property('[]'), /** Helper method returns the last object from a collection. If your enumerable contains only one object, this method should always return that object. If your enumerable is empty, this method should return `undefined`. ```javascript var arr = ["a", "b", "c"]; arr.lastObject(); // "c" var arr = []; arr.lastObject(); // undefined ``` @property lastObject @return {Object} the last object or undefined */ lastObject: Ember.computed(function() { var len = get(this, 'length'); if (len===0) return undefined ; var context = popCtx(), idx=0, cur, last = null; do { last = cur; cur = this.nextObject(idx++, last, context); } while (cur !== undefined); pushCtx(context); return last; }).property('[]'), /** Returns `true` if the passed object can be found in the receiver. The default version will iterate through the enumerable until the object is found. You may want to override this with a more efficient version. ```javascript var arr = ["a", "b", "c"]; arr.contains("a"); // true arr.contains("z"); // false ``` @method contains @param {Object} obj The object to search for. @return {Boolean} `true` if object is found in enumerable. */ contains: function(obj) { return this.find(function(item) { return item===obj; }) !== undefined; }, /** Iterates through the enumerable, calling the passed function on each item. This method corresponds to the `forEach()` method defined in JavaScript 1.6. The callback method you provide should have the following signature (all parameters are optional): ```javascript function(item, index, enumerable); ``` - `item` is the current item in the iteration. - `index` is the current index in the iteration. - `enumerable` is the enumerable object itself. Note that in addition to a callback, you can also pass an optional target object that will be set as `this` on the context. This is a good way to give your iterator function access to the current object. @method forEach @param {Function} callback The callback to execute @param {Object} [target] The target object to use @return {Object} receiver */ forEach: function(callback, target) { if (typeof callback !== "function") throw new TypeError() ; var len = get(this, 'length'), last = null, context = popCtx(); if (target === undefined) target = null; for(var idx=0;idx1) args = a_slice.call(arguments, 1); this.forEach(function(x, idx) { var method = x && x[methodName]; if ('function' === typeof method) { ret[idx] = args ? method.apply(x, args) : method.call(x); } }, this); return ret; }, /** Simply converts the enumerable into a genuine array. The order is not guaranteed. Corresponds to the method implemented by Prototype. @method toArray @return {Array} the enumerable as an array. */ toArray: function() { var ret = []; this.forEach(function(o, idx) { ret[idx] = o; }); return ret ; }, /** Returns a copy of the array with all null elements removed. ```javascript var arr = ["a", null, "c", null]; arr.compact(); // ["a", "c"] ``` @method compact @return {Array} the array without null elements. */ compact: function() { return this.without(null); }, /** Returns a new enumerable that excludes the passed value. The default implementation returns an array regardless of the receiver type unless the receiver does not contain the value. ```javascript var arr = ["a", "b", "a", "c"]; arr.without("a"); // ["b", "c"] ``` @method without @param {Object} value @return {Ember.Enumerable} */ without: function(value) { if (!this.contains(value)) return this; // nothing to do var ret = [] ; this.forEach(function(k) { if (k !== value) ret[ret.length] = k; }) ; return ret ; }, /** Returns a new enumerable that contains only unique values. The default implementation returns an array regardless of the receiver type. ```javascript var arr = ["a", "a", "b", "b"]; arr.uniq(); // ["a", "b"] ``` @method uniq @return {Ember.Enumerable} */ uniq: function() { var ret = []; this.forEach(function(k){ if (a_indexOf(ret, k)<0) ret.push(k); }); return ret; }, /** This property will trigger anytime the enumerable's content changes. You can observe this property to be notified of changes to the enumerables content. For plain enumerables, this property is read only. `Ember.Array` overrides this method. @property [] @type Ember.Array */ '[]': Ember.computed(function(key, value) { return this; }), // .......................................................... // ENUMERABLE OBSERVERS // /** Registers an enumerable observer. Must implement `Ember.EnumerableObserver` mixin. @method addEnumerableObserver @param target {Object} @param opts {Hash} */ addEnumerableObserver: function(target, opts) { var willChange = (opts && opts.willChange) || 'enumerableWillChange', didChange = (opts && opts.didChange) || 'enumerableDidChange'; var hasObservers = get(this, 'hasEnumerableObservers'); if (!hasObservers) Ember.propertyWillChange(this, 'hasEnumerableObservers'); Ember.addListener(this, '@enumerable:before', target, willChange); Ember.addListener(this, '@enumerable:change', target, didChange); if (!hasObservers) Ember.propertyDidChange(this, 'hasEnumerableObservers'); return this; }, /** Removes a registered enumerable observer. @method removeEnumerableObserver @param target {Object} @param [opts] {Hash} */ removeEnumerableObserver: function(target, opts) { var willChange = (opts && opts.willChange) || 'enumerableWillChange', didChange = (opts && opts.didChange) || 'enumerableDidChange'; var hasObservers = get(this, 'hasEnumerableObservers'); if (hasObservers) Ember.propertyWillChange(this, 'hasEnumerableObservers'); Ember.removeListener(this, '@enumerable:before', target, willChange); Ember.removeListener(this, '@enumerable:change', target, didChange); if (hasObservers) Ember.propertyDidChange(this, 'hasEnumerableObservers'); return this; }, /** Becomes true whenever the array currently has observers watching changes on the array. @property hasEnumerableObservers @type Boolean */ hasEnumerableObservers: Ember.computed(function() { return Ember.hasListeners(this, '@enumerable:change') || Ember.hasListeners(this, '@enumerable:before'); }), /** Invoke this method just before the contents of your enumerable will change. You can either omit the parameters completely or pass the objects to be removed or added if available or just a count. @method enumerableContentWillChange @param {Ember.Enumerable|Number} removing An enumerable of the objects to be removed or the number of items to be removed. @param {Ember.Enumerable|Number} adding An enumerable of the objects to be added or the number of items to be added. @chainable */ enumerableContentWillChange: function(removing, adding) { var removeCnt, addCnt, hasDelta; if ('number' === typeof removing) removeCnt = removing; else if (removing) removeCnt = get(removing, 'length'); else removeCnt = removing = -1; if ('number' === typeof adding) addCnt = adding; else if (adding) addCnt = get(adding,'length'); else addCnt = adding = -1; hasDelta = addCnt<0 || removeCnt<0 || addCnt-removeCnt!==0; if (removing === -1) removing = null; if (adding === -1) adding = null; Ember.propertyWillChange(this, '[]'); if (hasDelta) Ember.propertyWillChange(this, 'length'); Ember.sendEvent(this, '@enumerable:before', [this, removing, adding]); return this; }, /** Invoke this method when the contents of your enumerable has changed. This will notify any observers watching for content changes. If your are implementing an ordered enumerable (such as an array), also pass the start and end values where the content changed so that it can be used to notify range observers. @method enumerableContentDidChange @param {Number} [start] optional start offset for the content change. For unordered enumerables, you should always pass -1. @param {Ember.Enumerable|Number} removing An enumerable of the objects to be removed or the number of items to be removed. @param {Ember.Enumerable|Number} adding An enumerable of the objects to be added or the number of items to be added. @chainable */ enumerableContentDidChange: function(removing, adding) { var notify = this.propertyDidChange, removeCnt, addCnt, hasDelta; if ('number' === typeof removing) removeCnt = removing; else if (removing) removeCnt = get(removing, 'length'); else removeCnt = removing = -1; if ('number' === typeof adding) addCnt = adding; else if (adding) addCnt = get(adding, 'length'); else addCnt = adding = -1; hasDelta = addCnt<0 || removeCnt<0 || addCnt-removeCnt!==0; if (removing === -1) removing = null; if (adding === -1) adding = null; Ember.sendEvent(this, '@enumerable:change', [this, removing, adding]); if (hasDelta) Ember.propertyDidChange(this, 'length'); Ember.propertyDidChange(this, '[]'); return this ; } }) ; })(); (function() { /** @module ember @submodule ember-runtime */ // .......................................................... // HELPERS // var get = Ember.get, set = Ember.set, meta = Ember.meta, map = Ember.EnumerableUtils.map, cacheFor = Ember.cacheFor; function none(obj) { return obj===null || obj===undefined; } // .......................................................... // ARRAY // /** This module implements Observer-friendly Array-like behavior. This mixin is picked up by the Array class as well as other controllers, etc. that want to appear to be arrays. Unlike `Ember.Enumerable,` this mixin defines methods specifically for collections that provide index-ordered access to their contents. When you are designing code that needs to accept any kind of Array-like object, you should use these methods instead of Array primitives because these will properly notify observers of changes to the array. Although these methods are efficient, they do add a layer of indirection to your application so it is a good idea to use them only when you need the flexibility of using both true JavaScript arrays and "virtual" arrays such as controllers and collections. You can use the methods defined in this module to access and modify array contents in a KVO-friendly way. You can also be notified whenever the membership if an array changes by changing the syntax of the property to `.observes('*myProperty.[]')`. To support `Ember.Array` in your own class, you must override two primitives to use it: `replace()` and `objectAt()`. Note that the Ember.Array mixin also incorporates the `Ember.Enumerable` mixin. All `Ember.Array`-like objects are also enumerable. @class Array @namespace Ember @extends Ember.Mixin @uses Ember.Enumerable @since Ember 0.9.0 */ Ember.Array = Ember.Mixin.create(Ember.Enumerable, /** @scope Ember.Array.prototype */ { // compatibility isSCArray: true, /** Your array must support the `length` property. Your replace methods should set this property whenever it changes. @property {Number} length */ length: Ember.required(), /** Returns the object at the given `index`. If the given `index` is negative or is greater or equal than the array length, returns `undefined`. This is one of the primitives you must implement to support `Ember.Array`. If your object supports retrieving the value of an array item using `get()` (i.e. `myArray.get(0)`), then you do not need to implement this method yourself. ```javascript var arr = ['a', 'b', 'c', 'd']; arr.objectAt(0); // "a" arr.objectAt(3); // "d" arr.objectAt(-1); // undefined arr.objectAt(4); // undefined arr.objectAt(5); // undefined ``` @method objectAt @param {Number} idx The index of the item to return. */ objectAt: function(idx) { if ((idx < 0) || (idx>=get(this, 'length'))) return undefined ; return get(this, idx); }, /** This returns the objects at the specified indexes, using `objectAt`. ```javascript var arr = ['a', 'b', 'c', 'd']; arr.objectsAt([0, 1, 2]); // ["a", "b", "c"] arr.objectsAt([2, 3, 4]); // ["c", "d", undefined] ``` @method objectsAt @param {Array} indexes An array of indexes of items to return. */ objectsAt: function(indexes) { var self = this; return map(indexes, function(idx){ return self.objectAt(idx); }); }, // overrides Ember.Enumerable version nextObject: function(idx) { return this.objectAt(idx); }, /** This is the handler for the special array content property. If you get this property, it will return this. If you set this property it a new array, it will replace the current content. This property overrides the default property defined in `Ember.Enumerable`. @property [] */ '[]': Ember.computed(function(key, value) { if (value !== undefined) this.replace(0, get(this, 'length'), value) ; return this ; }), firstObject: Ember.computed(function() { return this.objectAt(0); }), lastObject: Ember.computed(function() { return this.objectAt(get(this, 'length')-1); }), // optimized version from Enumerable contains: function(obj){ return this.indexOf(obj) >= 0; }, // Add any extra methods to Ember.Array that are native to the built-in Array. /** Returns a new array that is a slice of the receiver. This implementation uses the observable array methods to retrieve the objects for the new slice. ```javascript var arr = ['red', 'green', 'blue']; arr.slice(0); // ['red', 'green', 'blue'] arr.slice(0, 2); // ['red', 'green'] arr.slice(1, 100); // ['green', 'blue'] ``` @method slice @param beginIndex {Integer} (Optional) index to begin slicing from. @param endIndex {Integer} (Optional) index to end the slice at. @return {Array} New array with specified slice */ slice: function(beginIndex, endIndex) { var ret = []; var length = get(this, 'length') ; if (none(beginIndex)) beginIndex = 0 ; if (none(endIndex) || (endIndex > length)) endIndex = length ; while(beginIndex < endIndex) { ret[ret.length] = this.objectAt(beginIndex++) ; } return ret ; }, /** Returns the index of the given object's first occurrence. If no `startAt` argument is given, the starting location to search is 0. If it's negative, will count backward from the end of the array. Returns -1 if no match is found. ```javascript var arr = ["a", "b", "c", "d", "a"]; arr.indexOf("a"); // 0 arr.indexOf("z"); // -1 arr.indexOf("a", 2); // 4 arr.indexOf("a", -1); // 4 arr.indexOf("b", 3); // -1 arr.indexOf("a", 100); // -1 ``` @method indexOf @param {Object} object the item to search for @param {Number} startAt optional starting location to search, default 0 @return {Number} index or -1 if not found */ indexOf: function(object, startAt) { var idx, len = get(this, 'length'); if (startAt === undefined) startAt = 0; if (startAt < 0) startAt += len; for(idx=startAt;idx= len) startAt = len-1; if (startAt < 0) startAt += len; for(idx=startAt;idx>=0;idx--) { if (this.objectAt(idx) === object) return idx ; } return -1; }, // .......................................................... // ARRAY OBSERVERS // /** Adds an array observer to the receiving array. The array observer object normally must implement two methods: * `arrayWillChange(start, removeCount, addCount)` - This method will be called just before the array is modified. * `arrayDidChange(start, removeCount, addCount)` - This method will be called just after the array is modified. Both callbacks will be passed the starting index of the change as well a a count of the items to be removed and added. You can use these callbacks to optionally inspect the array during the change, clear caches, or do any other bookkeeping necessary. In addition to passing a target, you can also include an options hash which you can use to override the method names that will be invoked on the target. @method addArrayObserver @param {Object} target The observer object. @param {Hash} opts Optional hash of configuration options including `willChange`, `didChange`, and a `context` option. @return {Ember.Array} receiver */ addArrayObserver: function(target, opts) { var willChange = (opts && opts.willChange) || 'arrayWillChange', didChange = (opts && opts.didChange) || 'arrayDidChange'; var hasObservers = get(this, 'hasArrayObservers'); if (!hasObservers) Ember.propertyWillChange(this, 'hasArrayObservers'); Ember.addListener(this, '@array:before', target, willChange); Ember.addListener(this, '@array:change', target, didChange); if (!hasObservers) Ember.propertyDidChange(this, 'hasArrayObservers'); return this; }, /** Removes an array observer from the object if the observer is current registered. Calling this method multiple times with the same object will have no effect. @method removeArrayObserver @param {Object} target The object observing the array. @return {Ember.Array} receiver */ removeArrayObserver: function(target, opts) { var willChange = (opts && opts.willChange) || 'arrayWillChange', didChange = (opts && opts.didChange) || 'arrayDidChange'; var hasObservers = get(this, 'hasArrayObservers'); if (hasObservers) Ember.propertyWillChange(this, 'hasArrayObservers'); Ember.removeListener(this, '@array:before', target, willChange); Ember.removeListener(this, '@array:change', target, didChange); if (hasObservers) Ember.propertyDidChange(this, 'hasArrayObservers'); return this; }, /** Becomes true whenever the array currently has observers watching changes on the array. @property Boolean */ hasArrayObservers: Ember.computed(function() { return Ember.hasListeners(this, '@array:change') || Ember.hasListeners(this, '@array:before'); }), /** If you are implementing an object that supports `Ember.Array`, call this method just before the array content changes to notify any observers and invalidate any related properties. Pass the starting index of the change as well as a delta of the amounts to change. @method arrayContentWillChange @param {Number} startIdx The starting index in the array that will change. @param {Number} removeAmt The number of items that will be removed. If you pass `null` assumes 0 @param {Number} addAmt The number of items that will be added If you pass `null` assumes 0. @return {Ember.Array} receiver */ arrayContentWillChange: function(startIdx, removeAmt, addAmt) { // if no args are passed assume everything changes if (startIdx===undefined) { startIdx = 0; removeAmt = addAmt = -1; } else { if (removeAmt === undefined) removeAmt=-1; if (addAmt === undefined) addAmt=-1; } // Make sure the @each proxy is set up if anyone is observing @each if (Ember.isWatching(this, '@each')) { get(this, '@each'); } Ember.sendEvent(this, '@array:before', [this, startIdx, removeAmt, addAmt]); var removing, lim; if (startIdx>=0 && removeAmt>=0 && get(this, 'hasEnumerableObservers')) { removing = []; lim = startIdx+removeAmt; for(var idx=startIdx;idx=0 && addAmt>=0 && get(this, 'hasEnumerableObservers')) { adding = []; lim = startIdx+addAmt; for(var idx=startIdx;idx b` Default implementation raises an exception. @method compare @param a {Object} the first object to compare @param b {Object} the second object to compare @return {Integer} the result of the comparison */ compare: Ember.required(Function) }); })(); (function() { /** @module ember @submodule ember-runtime */ var get = Ember.get, set = Ember.set; /** Implements some standard methods for copying an object. Add this mixin to any object you create that can create a copy of itself. This mixin is added automatically to the built-in array. You should generally implement the `copy()` method to return a copy of the receiver. Note that `frozenCopy()` will only work if you also implement `Ember.Freezable`. @class Copyable @namespace Ember @extends Ember.Mixin @since Ember 0.9 */ Ember.Copyable = Ember.Mixin.create( /** @scope Ember.Copyable.prototype */ { /** Override to return a copy of the receiver. Default implementation raises an exception. @method copy @param deep {Boolean} if `true`, a deep copy of the object should be made @return {Object} copy of receiver */ copy: Ember.required(Function), /** If the object implements `Ember.Freezable`, then this will return a new copy if the object is not frozen and the receiver if the object is frozen. Raises an exception if you try to call this method on a object that does not support freezing. You should use this method whenever you want a copy of a freezable object since a freezable object can simply return itself without actually consuming more memory. @method frozenCopy @return {Object} copy of receiver or receiver */ frozenCopy: function() { if (Ember.Freezable && Ember.Freezable.detect(this)) { return get(this, 'isFrozen') ? this : this.copy().freeze(); } else { throw new Error(Ember.String.fmt("%@ does not support freezing", [this])); } } }); })(); (function() { /** @module ember @submodule ember-runtime */ var get = Ember.get, set = Ember.set; /** The `Ember.Freezable` mixin implements some basic methods for marking an object as frozen. Once an object is frozen it should be read only. No changes may be made the internal state of the object. ## Enforcement To fully support freezing in your subclass, you must include this mixin and override any method that might alter any property on the object to instead raise an exception. You can check the state of an object by checking the `isFrozen` property. Although future versions of JavaScript may support language-level freezing object objects, that is not the case today. Even if an object is freezable, it is still technically possible to modify the object, even though it could break other parts of your application that do not expect a frozen object to change. It is, therefore, very important that you always respect the `isFrozen` property on all freezable objects. ## Example Usage The example below shows a simple object that implement the `Ember.Freezable` protocol. ```javascript Contact = Ember.Object.extend(Ember.Freezable, { firstName: null, lastName: null, // swaps the names swapNames: function() { if (this.get('isFrozen')) throw Ember.FROZEN_ERROR; var tmp = this.get('firstName'); this.set('firstName', this.get('lastName')); this.set('lastName', tmp); return this; } }); c = Context.create({ firstName: "John", lastName: "Doe" }); c.swapNames(); // returns c c.freeze(); c.swapNames(); // EXCEPTION ``` ## Copying Usually the `Ember.Freezable` protocol is implemented in cooperation with the `Ember.Copyable` protocol, which defines a `frozenCopy()` method that will return a frozen object, if the object implements this method as well. @class Freezable @namespace Ember @extends Ember.Mixin @since Ember 0.9 */ Ember.Freezable = Ember.Mixin.create( /** @scope Ember.Freezable.prototype */ { /** Set to `true` when the object is frozen. Use this property to detect whether your object is frozen or not. @property isFrozen @type Boolean */ isFrozen: false, /** Freezes the object. Once this method has been called the object should no longer allow any properties to be edited. @method freeze @return {Object} receiver */ freeze: function() { if (get(this, 'isFrozen')) return this; set(this, 'isFrozen', true); return this; } }); Ember.FROZEN_ERROR = "Frozen object cannot be modified."; })(); (function() { /** @module ember @submodule ember-runtime */ var forEach = Ember.EnumerableUtils.forEach; /** This mixin defines the API for modifying generic enumerables. These methods can be applied to an object regardless of whether it is ordered or unordered. Note that an Enumerable can change even if it does not implement this mixin. For example, a MappedEnumerable cannot be directly modified but if its underlying enumerable changes, it will change also. ## Adding Objects To add an object to an enumerable, use the `addObject()` method. This method will only add the object to the enumerable if the object is not already present and the object if of a type supported by the enumerable. ```javascript set.addObject(contact); ``` ## Removing Objects To remove an object form an enumerable, use the `removeObject()` method. This will only remove the object if it is already in the enumerable, otherwise this method has no effect. ```javascript set.removeObject(contact); ``` ## Implementing In Your Own Code If you are implementing an object and want to support this API, just include this mixin in your class and implement the required methods. In your unit tests, be sure to apply the Ember.MutableEnumerableTests to your object. @class MutableEnumerable @namespace Ember @extends Ember.Mixin @uses Ember.Enumerable */ Ember.MutableEnumerable = Ember.Mixin.create(Ember.Enumerable, /** @scope Ember.MutableEnumerable.prototype */ { /** __Required.__ You must implement this method to apply this mixin. Attempts to add the passed object to the receiver if the object is not already present in the collection. If the object is present, this method has no effect. If the passed object is of a type not supported by the receiver then this method should raise an exception. @method addObject @param {Object} object The object to add to the enumerable. @return {Object} the passed object */ addObject: Ember.required(Function), /** Adds each object in the passed enumerable to the receiver. @method addObjects @param {Ember.Enumerable} objects the objects to add. @return {Object} receiver */ addObjects: function(objects) { Ember.beginPropertyChanges(this); forEach(objects, function(obj) { this.addObject(obj); }, this); Ember.endPropertyChanges(this); return this; }, /** __Required.__ You must implement this method to apply this mixin. Attempts to remove the passed object from the receiver collection if the object is in present in the collection. If the object is not present, this method has no effect. If the passed object is of a type not supported by the receiver then this method should raise an exception. @method removeObject @param {Object} object The object to remove from the enumerable. @return {Object} the passed object */ removeObject: Ember.required(Function), /** Removes each objects in the passed enumerable from the receiver. @method removeObjects @param {Ember.Enumerable} objects the objects to remove @return {Object} receiver */ removeObjects: function(objects) { Ember.beginPropertyChanges(this); forEach(objects, function(obj) { this.removeObject(obj); }, this); Ember.endPropertyChanges(this); return this; } }); })(); (function() { /** @module ember @submodule ember-runtime */ // .......................................................... // CONSTANTS // var OUT_OF_RANGE_EXCEPTION = "Index out of range" ; var EMPTY = []; // .......................................................... // HELPERS // var get = Ember.get, set = Ember.set, forEach = Ember.EnumerableUtils.forEach; /** This mixin defines the API for modifying array-like objects. These methods can be applied only to a collection that keeps its items in an ordered set. Note that an Array can change even if it does not implement this mixin. For example, one might implement a SparseArray that cannot be directly modified, but if its underlying enumerable changes, it will change also. @class MutableArray @namespace Ember @extends Ember.Mixin @uses Ember.Array @uses Ember.MutableEnumerable */ Ember.MutableArray = Ember.Mixin.create(Ember.Array, Ember.MutableEnumerable, /** @scope Ember.MutableArray.prototype */ { /** __Required.__ You must implement this method to apply this mixin. This is one of the primitives you must implement to support `Ember.Array`. You should replace amt objects started at idx with the objects in the passed array. You should also call `this.enumerableContentDidChange()` @method replace @param {Number} idx Starting index in the array to replace. If idx >= length, then append to the end of the array. @param {Number} amt Number of elements that should be removed from the array, starting at *idx*. @param {Array} objects An array of zero or more objects that should be inserted into the array at *idx* */ replace: Ember.required(), /** Remove all elements from self. This is useful if you want to reuse an existing array without having to recreate it. ```javascript var colors = ["red", "green", "blue"]; color.length(); // 3 colors.clear(); // [] colors.length(); // 0 ``` @method clear @return {Ember.Array} An empty Array. */ clear: function () { var len = get(this, 'length'); if (len === 0) return this; this.replace(0, len, EMPTY); return this; }, /** This will use the primitive `replace()` method to insert an object at the specified index. ```javascript var colors = ["red", "green", "blue"]; colors.insertAt(2, "yellow"); // ["red", "green", "yellow", "blue"] colors.insertAt(5, "orange"); // Error: Index out of range ``` @method insertAt @param {Number} idx index of insert the object at. @param {Object} object object to insert */ insertAt: function(idx, object) { if (idx > get(this, 'length')) throw new Error(OUT_OF_RANGE_EXCEPTION) ; this.replace(idx, 0, [object]) ; return this ; }, /** Remove an object at the specified index using the `replace()` primitive method. You can pass either a single index, or a start and a length. If you pass a start and length that is beyond the length this method will throw an `Ember.OUT_OF_RANGE_EXCEPTION` ```javascript var colors = ["red", "green", "blue", "yellow", "orange"]; colors.removeAt(0); // ["green", "blue", "yellow", "orange"] colors.removeAt(2, 2); // ["green", "blue"] colors.removeAt(4, 2); // Error: Index out of range ``` @method removeAt @param {Number} start index, start of range @param {Number} len length of passing range @return {Object} receiver */ removeAt: function(start, len) { if ('number' === typeof start) { if ((start < 0) || (start >= get(this, 'length'))) { throw new Error(OUT_OF_RANGE_EXCEPTION); } // fast case if (len === undefined) len = 1; this.replace(start, len, EMPTY); } return this ; }, /** Push the object onto the end of the array. Works just like `push()` but it is KVO-compliant. ```javascript var colors = ["red", "green", "blue"]; colors.pushObject("black"); // ["red", "green", "blue", "black"] colors.pushObject(["yellow", "orange"]); // ["red", "green", "blue", "black", ["yellow", "orange"]] ``` @method pushObject @param {anything} obj object to push */ pushObject: function(obj) { this.insertAt(get(this, 'length'), obj) ; return obj ; }, /** Add the objects in the passed numerable to the end of the array. Defers notifying observers of the change until all objects are added. ```javascript var colors = ["red", "green", "blue"]; colors.pushObjects("black"); // ["red", "green", "blue", "black"] colors.pushObjects(["yellow", "orange"]); // ["red", "green", "blue", "black", "yellow", "orange"] ``` @method pushObjects @param {Ember.Enumerable} objects the objects to add @return {Ember.Array} receiver */ pushObjects: function(objects) { this.replace(get(this, 'length'), 0, objects); return this; }, /** Pop object from array or nil if none are left. Works just like `pop()` but it is KVO-compliant. ```javascript var colors = ["red", "green", "blue"]; colors.popObject(); // "blue" console.log(colors); // ["red", "green"] ``` @method popObject @return object */ popObject: function() { var len = get(this, 'length') ; if (len === 0) return null ; var ret = this.objectAt(len-1) ; this.removeAt(len-1, 1) ; return ret ; }, /** Shift an object from start of array or nil if none are left. Works just like `shift()` but it is KVO-compliant. ```javascript var colors = ["red", "green", "blue"]; colors.shiftObject(); // "red" console.log(colors); // ["green", "blue"] ``` @method shiftObject @return object */ shiftObject: function() { if (get(this, 'length') === 0) return null ; var ret = this.objectAt(0) ; this.removeAt(0) ; return ret ; }, /** Unshift an object to start of array. Works just like `unshift()` but it is KVO-compliant. ```javascript var colors = ["red", "green", "blue"]; colors.unshiftObject("yellow"); // ["yellow", "red", "green", "blue"] colors.unshiftObject(["black", "white"]); // [["black", "white"], "yellow", "red", "green", "blue"] ``` @method unshiftObject @param {anything} obj object to unshift */ unshiftObject: function(obj) { this.insertAt(0, obj) ; return obj ; }, /** Adds the named objects to the beginning of the array. Defers notifying observers until all objects have been added. ```javascript var colors = ["red", "green", "blue"]; colors.unshiftObjects(["black", "white"]); // ["black", "white", "red", "green", "blue"] colors.unshiftObjects("yellow"); // Type Error: 'undefined' is not a function ``` @method unshiftObjects @param {Ember.Enumerable} objects the objects to add @return {Ember.Array} receiver */ unshiftObjects: function(objects) { this.replace(0, 0, objects); return this; }, /** Reverse objects in the array. Works just like `reverse()` but it is KVO-compliant. @method reverseObjects @return {Ember.Array} receiver */ reverseObjects: function() { var len = get(this, 'length'); if (len === 0) return this; var objects = this.toArray().reverse(); this.replace(0, len, objects); return this; }, /** Replace all the the receiver's content with content of the argument. If argument is an empty array receiver will be cleared. ```javascript var colors = ["red", "green", "blue"]; colors.setObjects(["black", "white"]); // ["black", "white"] colors.setObjects([]); // [] ``` @method setObjects @param {Ember.Array} objects array whose content will be used for replacing the content of the receiver @return {Ember.Array} receiver with the new content */ setObjects: function(objects) { if (objects.length === 0) return this.clear(); var len = get(this, 'length'); this.replace(0, len, objects); return this; }, // .......................................................... // IMPLEMENT Ember.MutableEnumerable // removeObject: function(obj) { var loc = get(this, 'length') || 0; while(--loc >= 0) { var curObject = this.objectAt(loc) ; if (curObject === obj) this.removeAt(loc) ; } return this ; }, addObject: function(obj) { if (!this.contains(obj)) this.pushObject(obj); return this ; } }); })(); (function() { /** @module ember @submodule ember-runtime */ var get = Ember.get, set = Ember.set, defineProperty = Ember.defineProperty; /** ## Overview This mixin provides properties and property observing functionality, core features of the Ember object model. Properties and observers allow one object to observe changes to a property on another object. This is one of the fundamental ways that models, controllers and views communicate with each other in an Ember application. Any object that has this mixin applied can be used in observer operations. That includes `Ember.Object` and most objects you will interact with as you write your Ember application. Note that you will not generally apply this mixin to classes yourself, but you will use the features provided by this module frequently, so it is important to understand how to use it. ## Using `get()` and `set()` Because of Ember's support for bindings and observers, you will always access properties using the get method, and set properties using the set method. This allows the observing objects to be notified and computed properties to be handled properly. More documentation about `get` and `set` are below. ## Observing Property Changes You typically observe property changes simply by adding the `observes` call to the end of your method declarations in classes that you write. For example: ```javascript Ember.Object.create({ valueObserver: function() { // Executes whenever the "value" property changes }.observes('value') }); ``` Although this is the most common way to add an observer, this capability is actually built into the `Ember.Object` class on top of two methods defined in this mixin: `addObserver` and `removeObserver`. You can use these two methods to add and remove observers yourself if you need to do so at runtime. To add an observer for a property, call: ```javascript object.addObserver('propertyKey', targetObject, targetAction) ``` This will call the `targetAction` method on the `targetObject` to be called whenever the value of the `propertyKey` changes. Note that if `propertyKey` is a computed property, the observer will be called when any of the property dependencies are changed, even if the resulting value of the computed property is unchanged. This is necessary because computed properties are not computed until `get` is called. @class Observable @namespace Ember @extends Ember.Mixin */ Ember.Observable = Ember.Mixin.create(/** @scope Ember.Observable.prototype */ { /** Retrieves the value of a property from the object. This method is usually similar to using `object[keyName]` or `object.keyName`, however it supports both computed properties and the unknownProperty handler. Because `get` unifies the syntax for accessing all these kinds of properties, it can make many refactorings easier, such as replacing a simple property with a computed property, or vice versa. ### Computed Properties Computed properties are methods defined with the `property` modifier declared at the end, such as: ```javascript fullName: function() { return this.getEach('firstName', 'lastName').compact().join(' '); }.property('firstName', 'lastName') ``` When you call `get` on a computed property, the function will be called and the return value will be returned instead of the function itself. ### Unknown Properties Likewise, if you try to call `get` on a property whose value is `undefined`, the `unknownProperty()` method will be called on the object. If this method returns any value other than `undefined`, it will be returned instead. This allows you to implement "virtual" properties that are not defined upfront. @method get @param {String} key The property to retrieve @return {Object} The property value or undefined. */ get: function(keyName) { return get(this, keyName); }, /** To get multiple properties at once, call `getProperties` with a list of strings or an array: ```javascript record.getProperties('firstName', 'lastName', 'zipCode'); // { firstName: 'John', lastName: 'Doe', zipCode: '10011' } ``` is equivalent to: ```javascript record.getProperties(['firstName', 'lastName', 'zipCode']); // { firstName: 'John', lastName: 'Doe', zipCode: '10011' } ``` @method getProperties @param {String...|Array} list of keys to get @return {Hash} */ getProperties: function() { var ret = {}; var propertyNames = arguments; if (arguments.length === 1 && Ember.typeOf(arguments[0]) === 'array') { propertyNames = arguments[0]; } for(var i = 0; i < propertyNames.length; i++) { ret[propertyNames[i]] = get(this, propertyNames[i]); } return ret; }, /** Sets the provided key or path to the value. This method is generally very similar to calling `object[key] = value` or `object.key = value`, except that it provides support for computed properties, the `unknownProperty()` method and property observers. ### Computed Properties If you try to set a value on a key that has a computed property handler defined (see the `get()` method for an example), then `set()` will call that method, passing both the value and key instead of simply changing the value itself. This is useful for those times when you need to implement a property that is composed of one or more member properties. ### Unknown Properties If you try to set a value on a key that is undefined in the target object, then the `unknownProperty()` handler will be called instead. This gives you an opportunity to implement complex "virtual" properties that are not predefined on the object. If `unknownProperty()` returns undefined, then `set()` will simply set the value on the object. ### Property Observers In addition to changing the property, `set()` will also register a property change with the object. Unless you have placed this call inside of a `beginPropertyChanges()` and `endPropertyChanges(),` any "local" observers (i.e. observer methods declared on the same object), will be called immediately. Any "remote" observers (i.e. observer methods declared on another object) will be placed in a queue and called at a later time in a coalesced manner. ### Chaining In addition to property changes, `set()` returns the value of the object itself so you can do chaining like this: ```javascript record.set('firstName', 'Charles').set('lastName', 'Jolley'); ``` @method set @param {String} key The property to set @param {Object} value The value to set or `null`. @return {Ember.Observable} */ set: function(keyName, value) { set(this, keyName, value); return this; }, /** To set multiple properties at once, call `setProperties` with a Hash: ```javascript record.setProperties({ firstName: 'Charles', lastName: 'Jolley' }); ``` @method setProperties @param {Hash} hash the hash of keys and values to set @return {Ember.Observable} */ setProperties: function(hash) { return Ember.setProperties(this, hash); }, /** Begins a grouping of property changes. You can use this method to group property changes so that notifications will not be sent until the changes are finished. If you plan to make a large number of changes to an object at one time, you should call this method at the beginning of the changes to begin deferring change notifications. When you are done making changes, call `endPropertyChanges()` to deliver the deferred change notifications and end deferring. @method beginPropertyChanges @return {Ember.Observable} */ beginPropertyChanges: function() { Ember.beginPropertyChanges(); return this; }, /** Ends a grouping of property changes. You can use this method to group property changes so that notifications will not be sent until the changes are finished. If you plan to make a large number of changes to an object at one time, you should call `beginPropertyChanges()` at the beginning of the changes to defer change notifications. When you are done making changes, call this method to deliver the deferred change notifications and end deferring. @method endPropertyChanges @return {Ember.Observable} */ endPropertyChanges: function() { Ember.endPropertyChanges(); return this; }, /** Notify the observer system that a property is about to change. Sometimes you need to change a value directly or indirectly without actually calling `get()` or `set()` on it. In this case, you can use this method and `propertyDidChange()` instead. Calling these two methods together will notify all observers that the property has potentially changed value. Note that you must always call `propertyWillChange` and `propertyDidChange` as a pair. If you do not, it may get the property change groups out of order and cause notifications to be delivered more often than you would like. @method propertyWillChange @param {String} key The property key that is about to change. @return {Ember.Observable} */ propertyWillChange: function(keyName){ Ember.propertyWillChange(this, keyName); return this; }, /** Notify the observer system that a property has just changed. Sometimes you need to change a value directly or indirectly without actually calling `get()` or `set()` on it. In this case, you can use this method and `propertyWillChange()` instead. Calling these two methods together will notify all observers that the property has potentially changed value. Note that you must always call `propertyWillChange` and `propertyDidChange` as a pair. If you do not, it may get the property change groups out of order and cause notifications to be delivered more often than you would like. @method propertyDidChange @param {String} keyName The property key that has just changed. @return {Ember.Observable} */ propertyDidChange: function(keyName) { Ember.propertyDidChange(this, keyName); return this; }, /** Convenience method to call `propertyWillChange` and `propertyDidChange` in succession. @method notifyPropertyChange @param {String} keyName The property key to be notified about. @return {Ember.Observable} */ notifyPropertyChange: function(keyName) { this.propertyWillChange(keyName); this.propertyDidChange(keyName); return this; }, addBeforeObserver: function(key, target, method) { Ember.addBeforeObserver(this, key, target, method); }, /** Adds an observer on a property. This is the core method used to register an observer for a property. Once you call this method, anytime the key's value is set, your observer will be notified. Note that the observers are triggered anytime the value is set, regardless of whether it has actually changed. Your observer should be prepared to handle that. You can also pass an optional context parameter to this method. The context will be passed to your observer method whenever it is triggered. Note that if you add the same target/method pair on a key multiple times with different context parameters, your observer will only be called once with the last context you passed. ### Observer Methods Observer methods you pass should generally have the following signature if you do not pass a `context` parameter: ```javascript fooDidChange: function(sender, key, value, rev) { }; ``` The sender is the object that changed. The key is the property that changes. The value property is currently reserved and unused. The rev is the last property revision of the object when it changed, which you can use to detect if the key value has really changed or not. If you pass a `context` parameter, the context will be passed before the revision like so: ```javascript fooDidChange: function(sender, key, value, context, rev) { }; ``` Usually you will not need the value, context or revision parameters at the end. In this case, it is common to write observer methods that take only a sender and key value as parameters or, if you aren't interested in any of these values, to write an observer that has no parameters at all. @method addObserver @param {String} key The key to observer @param {Object} target The target object to invoke @param {String|Function} method The method to invoke. @return {Ember.Object} self */ addObserver: function(key, target, method) { Ember.addObserver(this, key, target, method); }, /** Remove an observer you have previously registered on this object. Pass the same key, target, and method you passed to `addObserver()` and your target will no longer receive notifications. @method removeObserver @param {String} key The key to observer @param {Object} target The target object to invoke @param {String|Function} method The method to invoke. @return {Ember.Observable} receiver */ removeObserver: function(key, target, method) { Ember.removeObserver(this, key, target, method); }, /** Returns `true` if the object currently has observers registered for a particular key. You can use this method to potentially defer performing an expensive action until someone begins observing a particular property on the object. @method hasObserverFor @param {String} key Key to check @return {Boolean} */ hasObserverFor: function(key) { return Ember.hasListeners(this, key+':change'); }, /** @deprecated @method getPath @param {String} path The property path to retrieve @return {Object} The property value or undefined. */ getPath: function(path) { return this.get(path); }, /** @deprecated @method setPath @param {String} path The path to the property that will be set @param {Object} value The value to set or `null`. @return {Ember.Observable} */ setPath: function(path, value) { return this.set(path, value); }, /** Retrieves the value of a property, or a default value in the case that the property returns `undefined`. ```javascript person.getWithDefault('lastName', 'Doe'); ``` @method getWithDefault @param {String} keyName The name of the property to retrieve @param {Object} defaultValue The value to return if the property value is undefined @return {Object} The property value or the defaultValue. */ getWithDefault: function(keyName, defaultValue) { return Ember.getWithDefault(this, keyName, defaultValue); }, /** Set the value of a property to the current value plus some amount. ```javascript person.incrementProperty('age'); team.incrementProperty('score', 2); ``` @method incrementProperty @param {String} keyName The name of the property to increment @param {Object} increment The amount to increment by. Defaults to 1 @return {Object} The new property value */ incrementProperty: function(keyName, increment) { if (!increment) { increment = 1; } set(this, keyName, (get(this, keyName) || 0)+increment); return get(this, keyName); }, /** Set the value of a property to the current value minus some amount. ```javascript player.decrementProperty('lives'); orc.decrementProperty('health', 5); ``` @method decrementProperty @param {String} keyName The name of the property to decrement @param {Object} increment The amount to decrement by. Defaults to 1 @return {Object} The new property value */ decrementProperty: function(keyName, increment) { if (!increment) { increment = 1; } set(this, keyName, (get(this, keyName) || 0)-increment); return get(this, keyName); }, /** Set the value of a boolean property to the opposite of it's current value. ```javascript starship.toggleProperty('warpDriveEnaged'); ``` @method toggleProperty @param {String} keyName The name of the property to toggle @return {Object} The new property value */ toggleProperty: function(keyName) { set(this, keyName, !get(this, keyName)); return get(this, keyName); }, /** Returns the cached value of a computed property, if it exists. This allows you to inspect the value of a computed property without accidentally invoking it if it is intended to be generated lazily. @method cacheFor @param {String} keyName @return {Object} The cached value of the computed property, if any */ cacheFor: function(keyName) { return Ember.cacheFor(this, keyName); }, // intended for debugging purposes observersForKey: function(keyName) { return Ember.observersFor(this, keyName); } }); })(); (function() { /** @module ember @submodule ember-runtime */ var get = Ember.get, set = Ember.set; /** @class TargetActionSupport @namespace Ember @extends Ember.Mixin */ Ember.TargetActionSupport = Ember.Mixin.create({ target: null, action: null, targetObject: Ember.computed(function() { var target = get(this, 'target'); if (Ember.typeOf(target) === "string") { var value = get(this, target); if (value === undefined) { value = get(Ember.lookup, target); } return value; } else { return target; } }).property('target'), triggerAction: function() { var action = get(this, 'action'), target = get(this, 'targetObject'); if (target && action) { var ret; if (typeof target.send === 'function') { ret = target.send(action, this); } else { if (typeof action === 'string') { action = target[action]; } ret = action.call(target, this); } if (ret !== false) ret = true; return ret; } else { return false; } } }); })(); (function() { /** @module ember @submodule ember-runtime */ /** This mixin allows for Ember objects to subscribe to and emit events. ```javascript App.Person = Ember.Object.extend(Ember.Evented, { greet: function() { // ... this.trigger('greet'); } }); var person = App.Person.create(); person.on('greet', function() { console.log('Our person has greeted'); }); person.greet(); // outputs: 'Our person has greeted' ``` @class Evented @namespace Ember @extends Ember.Mixin */ Ember.Evented = Ember.Mixin.create({ /** Subscribes to a named event with given function. ```javascript person.on('didLoad', function() { // fired once the person has loaded }); ``` An optional target can be passed in as the 2nd argument that will be set as the "this" for the callback. This is a good way to give your function access to the object triggering the event. When the target parameter is used the callback becomes the third argument. @method on @param {String} name The name of the event @param {Object} [target] The "this" binding for the callback @param {Function} method The callback to execute */ on: function(name, target, method) { Ember.addListener(this, name, target, method); }, /** Subscribes a function to a named event and then cancels the subscription after the first time the event is triggered. It is good to use ``one`` when you only care about the first time an event has taken place. This function takes an optional 2nd argument that will become the "this" value for the callback. If this argument is passed then the 3rd argument becomes the function. @method one @param {String} name The name of the event @param {Object} [target] The "this" binding for the callback @param {Function} method The callback to execute */ one: function(name, target, method) { if (!method) { method = target; target = null; } Ember.addListener(this, name, target, method, true); }, /** Triggers a named event for the object. Any additional arguments will be passed as parameters to the functions that are subscribed to the event. ```javascript person.on('didEat', food) { console.log('person ate some ' + food); }); person.trigger('didEat', 'broccoli'); // outputs: person ate some broccoli ``` @method trigger @param {String} name The name of the event @param {Object...} args Optional arguments to pass on */ trigger: function(name) { var args = [], i, l; for (i = 1, l = arguments.length; i < l; i++) { args.push(arguments[i]); } Ember.sendEvent(this, name, args); }, fire: function(name) { this.trigger.apply(this, arguments); }, /** Cancels subscription for give name, target, and method. @method off @param {String} name The name of the event @param {Object} target The target of the subscription @param {Function} method The function of the subscription */ off: function(name, target, method) { Ember.removeListener(this, name, target, method); }, /** Checks to see if object has any subscriptions for named event. @method has @param {String} name The name of the event @return {Boolean} does the object have a subscription for event */ has: function(name) { return Ember.hasListeners(this, name); } }); })(); (function() { var RSVP = requireModule("rsvp"); RSVP.async = function(callback, binding) { Ember.run.schedule('actions', binding, callback); }; /** @module ember @submodule ember-runtime */ var get = Ember.get, slice = Array.prototype.slice; /** @class Deferred @namespace Ember @extends Ember.Mixin */ Ember.DeferredMixin = Ember.Mixin.create({ /** Add handlers to be called when the Deferred object is resolved or rejected. @method then @param {Function} doneCallback a callback function to be called when done @param {Function} failCallback a callback function to be called when failed */ then: function(doneCallback, failCallback) { var promise = get(this, 'promise'); return promise.then.apply(promise, arguments); }, /** Resolve a Deferred object and call any `doneCallbacks` with the given args. @method resolve */ resolve: function(value) { get(this, 'promise').resolve(value); }, /** Reject a Deferred object and call any `failCallbacks` with the given args. @method reject */ reject: function(value) { get(this, 'promise').reject(value); }, promise: Ember.computed(function() { return new RSVP.Promise(); }) }); })(); (function() { })(); (function() { Ember.Container = requireModule('container'); Ember.Container.set = Ember.set; })(); (function() { /** @module ember @submodule ember-runtime */ // NOTE: this object should never be included directly. Instead use Ember. // Ember.Object. We only define this separately so that Ember.Set can depend on it var set = Ember.set, get = Ember.get, o_create = Ember.create, o_defineProperty = Ember.platform.defineProperty, a_slice = Array.prototype.slice, GUID_KEY = Ember.GUID_KEY, guidFor = Ember.guidFor, generateGuid = Ember.generateGuid, meta = Ember.meta, rewatch = Ember.rewatch, finishChains = Ember.finishChains, destroy = Ember.destroy, schedule = Ember.run.schedule, Mixin = Ember.Mixin, applyMixin = Mixin._apply, finishPartial = Mixin.finishPartial, reopen = Mixin.prototype.reopen, MANDATORY_SETTER = Ember.ENV.MANDATORY_SETTER, indexOf = Ember.EnumerableUtils.indexOf; var undefinedDescriptor = { configurable: true, writable: true, enumerable: false, value: undefined }; function makeCtor() { // Note: avoid accessing any properties on the object since it makes the // method a lot faster. This is glue code so we want it to be as fast as // possible. var wasApplied = false, initMixins, initProperties; var Class = function() { if (!wasApplied) { Class.proto(); // prepare prototype... } o_defineProperty(this, GUID_KEY, undefinedDescriptor); o_defineProperty(this, '_super', undefinedDescriptor); var m = meta(this); m.proto = this; if (initMixins) { // capture locally so we can clear the closed over variable var mixins = initMixins; initMixins = null; this.reopen.apply(this, mixins); } if (initProperties) { // capture locally so we can clear the closed over variable var props = initProperties; initProperties = null; var concatenatedProperties = this.concatenatedProperties; for (var i = 0, l = props.length; i < l; i++) { var properties = props[i]; for (var keyName in properties) { if (!properties.hasOwnProperty(keyName)) { continue; } var value = properties[keyName], IS_BINDING = Ember.IS_BINDING; if (IS_BINDING.test(keyName)) { var bindings = m.bindings; if (!bindings) { bindings = m.bindings = {}; } else if (!m.hasOwnProperty('bindings')) { bindings = m.bindings = o_create(m.bindings); } bindings[keyName] = value; } var desc = m.descs[keyName]; if (concatenatedProperties && indexOf(concatenatedProperties, keyName) >= 0) { var baseValue = this[keyName]; if (baseValue) { if ('function' === typeof baseValue.concat) { value = baseValue.concat(value); } else { value = Ember.makeArray(baseValue).concat(value); } } else { value = Ember.makeArray(value); } } if (desc) { desc.set(this, keyName, value); } else { if (typeof this.setUnknownProperty === 'function' && !(keyName in this)) { this.setUnknownProperty(keyName, value); } else if (MANDATORY_SETTER) { Ember.defineProperty(this, keyName, null, value); // setup mandatory setter } else { this[keyName] = value; } } } } } finishPartial(this, m); delete m.proto; finishChains(this); this.init.apply(this, arguments); }; Class.toString = Mixin.prototype.toString; Class.willReopen = function() { if (wasApplied) { Class.PrototypeMixin = Mixin.create(Class.PrototypeMixin); } wasApplied = false; }; Class._initMixins = function(args) { initMixins = args; }; Class._initProperties = function(args) { initProperties = args; }; Class.proto = function() { var superclass = Class.superclass; if (superclass) { superclass.proto(); } if (!wasApplied) { wasApplied = true; Class.PrototypeMixin.applyPartial(Class.prototype); rewatch(Class.prototype); } return this.prototype; }; return Class; } var CoreObject = makeCtor(); CoreObject.toString = function() { return "Ember.CoreObject"; }; CoreObject.PrototypeMixin = Mixin.create({ reopen: function() { applyMixin(this, arguments, true); return this; }, isInstance: true, init: function() {}, /** Defines the properties that will be concatenated from the superclass (instead of overridden). By default, when you extend an Ember class a property defined in the subclass overrides a property with the same name that is defined in the superclass. However, there are some cases where it is preferable to build up a property's value by combining the superclass' property value with the subclass' value. An example of this in use within Ember is the `classNames` property of `Ember.View`. Here is some sample code showing the difference between a concatenated property and a normal one: ```javascript App.BarView = Ember.View.extend({ someNonConcatenatedProperty: ['bar'], classNames: ['bar'] }); App.FooBarView = App.BarView.extend({ someNonConcatenatedProperty: ['foo'], classNames: ['foo'], }); var fooBarView = App.FooBarView.create(); fooBarView.get('someNonConcatenatedProperty'); // ['foo'] fooBarView.get('classNames'); // ['ember-view', 'bar', 'foo'] ``` This behavior extends to object creation as well. Continuing the above example: ```javascript var view = App.FooBarView.create({ someNonConcatenatedProperty: ['baz'], classNames: ['baz'] }) view.get('someNonConcatenatedProperty'); // ['baz'] view.get('classNames'); // ['ember-view', 'bar', 'foo', 'baz'] ``` Adding a single property that is not an array will just add it in the array: ```javascript var view = App.FooBarView.create({ classNames: 'baz' }) view.get('classNames'); // ['ember-view', 'bar', 'foo', 'baz'] ``` Using the `concatenatedProperties` property, we can tell to Ember that mix the content of the properties. In `Ember.View` the `classNameBindings` and `attributeBindings` properties are also concatenated, in addition to `classNames`. This feature is available for you to use throughout the Ember object model, although typical app developers are likely to use it infrequently. @property concatenatedProperties @type Array @default null */ concatenatedProperties: null, /** @property isDestroyed @default false */ isDestroyed: false, /** @property isDestroying @default false */ isDestroying: false, /** Destroys an object by setting the `isDestroyed` flag and removing its metadata, which effectively destroys observers and bindings. If you try to set a property on a destroyed object, an exception will be raised. Note that destruction is scheduled for the end of the run loop and does not happen immediately. @method destroy @return {Ember.Object} receiver */ destroy: function() { if (this._didCallDestroy) { return; } this.isDestroying = true; this._didCallDestroy = true; if (this.willDestroy) { this.willDestroy(); } schedule('destroy', this, this._scheduledDestroy); return this; }, /** @private Invoked by the run loop to actually destroy the object. This is scheduled for execution by the `destroy` method. @method _scheduledDestroy */ _scheduledDestroy: function() { destroy(this); set(this, 'isDestroyed', true); if (this.didDestroy) { this.didDestroy(); } }, bind: function(to, from) { if (!(from instanceof Ember.Binding)) { from = Ember.Binding.from(from); } from.to(to).connect(this); return from; }, /** Returns a string representation which attempts to provide more information than Javascript's `toString` typically does, in a generic way for all Ember objects. App.Person = Em.Object.extend() person = App.Person.create() person.toString() //=> "" If the object's class is not defined on an Ember namespace, it will indicate it is a subclass of the registered superclass: Student = App.Person.extend() student = Student.create() student.toString() //=> "<(subclass of App.Person):ember1025>" If the method `toStringExtension` is defined, its return value will be included in the output. App.Teacher = App.Person.extend({ toStringExtension: function(){ return this.get('fullName'); } }); teacher = App.Teacher.create() teacher.toString(); // #=> "" @method toString @return {String} string representation */ toString: function toString() { var hasToStringExtension = typeof this.toStringExtension === 'function', extension = hasToStringExtension ? ":" + this.toStringExtension() : ''; var ret = '<'+this.constructor.toString()+':'+guidFor(this)+extension+'>'; this.toString = makeToString(ret); return ret; } }); CoreObject.PrototypeMixin.ownerConstructor = CoreObject; function makeToString(ret) { return function() { return ret; }; } if (Ember.config.overridePrototypeMixin) { Ember.config.overridePrototypeMixin(CoreObject.PrototypeMixin); } CoreObject.__super__ = null; var ClassMixin = Mixin.create({ ClassMixin: Ember.required(), PrototypeMixin: Ember.required(), isClass: true, isMethod: false, extend: function() { var Class = makeCtor(), proto; Class.ClassMixin = Mixin.create(this.ClassMixin); Class.PrototypeMixin = Mixin.create(this.PrototypeMixin); Class.ClassMixin.ownerConstructor = Class; Class.PrototypeMixin.ownerConstructor = Class; reopen.apply(Class.PrototypeMixin, arguments); Class.superclass = this; Class.__super__ = this.prototype; proto = Class.prototype = o_create(this.prototype); proto.constructor = Class; generateGuid(proto, 'ember'); meta(proto).proto = proto; // this will disable observers on prototype Class.ClassMixin.apply(Class); return Class; }, createWithMixins: function() { var C = this; if (arguments.length>0) { this._initMixins(arguments); } return new C(); }, create: function() { var C = this; if (arguments.length>0) { this._initProperties(arguments); } return new C(); }, reopen: function() { this.willReopen(); reopen.apply(this.PrototypeMixin, arguments); return this; }, reopenClass: function() { reopen.apply(this.ClassMixin, arguments); applyMixin(this, arguments, false); return this; }, detect: function(obj) { if ('function' !== typeof obj) { return false; } while(obj) { if (obj===this) { return true; } obj = obj.superclass; } return false; }, detectInstance: function(obj) { return obj instanceof this; }, /** In some cases, you may want to annotate computed properties with additional metadata about how they function or what values they operate on. For example, computed property functions may close over variables that are then no longer available for introspection. You can pass a hash of these values to a computed property like this: ```javascript person: function() { var personId = this.get('personId'); return App.Person.create({ id: personId }); }.property().meta({ type: App.Person }) ``` Once you've done this, you can retrieve the values saved to the computed property from your class like this: ```javascript MyClass.metaForProperty('person'); ``` This will return the original hash that was passed to `meta()`. @method metaForProperty @param key {String} property name */ metaForProperty: function(key) { var desc = meta(this.proto(), false).descs[key]; return desc._meta || {}; }, /** Iterate over each computed property for the class, passing its name and any associated metadata (see `metaForProperty`) to the callback. @method eachComputedProperty @param {Function} callback @param {Object} binding */ eachComputedProperty: function(callback, binding) { var proto = this.proto(), descs = meta(proto).descs, empty = {}, property; for (var name in descs) { property = descs[name]; if (property instanceof Ember.ComputedProperty) { callback.call(binding || this, name, property._meta || empty); } } } }); ClassMixin.ownerConstructor = CoreObject; if (Ember.config.overrideClassMixin) { Ember.config.overrideClassMixin(ClassMixin); } CoreObject.ClassMixin = ClassMixin; ClassMixin.apply(CoreObject); /** @class CoreObject @namespace Ember */ Ember.CoreObject = CoreObject; })(); (function() { /** @module ember @submodule ember-runtime */ var get = Ember.get, set = Ember.set, guidFor = Ember.guidFor, none = Ember.isNone; /** An unordered collection of objects. A Set works a bit like an array except that its items are not ordered. You can create a set to efficiently test for membership for an object. You can also iterate through a set just like an array, even accessing objects by index, however there is no guarantee as to their order. All Sets are observable via the Enumerable Observer API - which works on any enumerable object including both Sets and Arrays. ## Creating a Set You can create a set like you would most objects using `new Ember.Set()`. Most new sets you create will be empty, but you can also initialize the set with some content by passing an array or other enumerable of objects to the constructor. Finally, you can pass in an existing set and the set will be copied. You can also create a copy of a set by calling `Ember.Set#copy()`. ```javascript // creates a new empty set var foundNames = new Ember.Set(); // creates a set with four names in it. var names = new Ember.Set(["Charles", "Tom", "Juan", "Alex"]); // :P // creates a copy of the names set. var namesCopy = new Ember.Set(names); // same as above. var anotherNamesCopy = names.copy(); ``` ## Adding/Removing Objects You generally add or remove objects from a set using `add()` or `remove()`. You can add any type of object including primitives such as numbers, strings, and booleans. Unlike arrays, objects can only exist one time in a set. If you call `add()` on a set with the same object multiple times, the object will only be added once. Likewise, calling `remove()` with the same object multiple times will remove the object the first time and have no effect on future calls until you add the object to the set again. NOTE: You cannot add/remove `null` or `undefined` to a set. Any attempt to do so will be ignored. In addition to add/remove you can also call `push()`/`pop()`. Push behaves just like `add()` but `pop()`, unlike `remove()` will pick an arbitrary object, remove it and return it. This is a good way to use a set as a job queue when you don't care which order the jobs are executed in. ## Testing for an Object To test for an object's presence in a set you simply call `Ember.Set#contains()`. ## Observing changes When using `Ember.Set`, you can observe the `"[]"` property to be alerted whenever the content changes. You can also add an enumerable observer to the set to be notified of specific objects that are added and removed from the set. See `Ember.Enumerable` for more information on enumerables. This is often unhelpful. If you are filtering sets of objects, for instance, it is very inefficient to re-filter all of the items each time the set changes. It would be better if you could just adjust the filtered set based on what was changed on the original set. The same issue applies to merging sets, as well. ## Other Methods `Ember.Set` primary implements other mixin APIs. For a complete reference on the methods you will use with `Ember.Set`, please consult these mixins. The most useful ones will be `Ember.Enumerable` and `Ember.MutableEnumerable` which implement most of the common iterator methods you are used to on Array. Note that you can also use the `Ember.Copyable` and `Ember.Freezable` APIs on `Ember.Set` as well. Once a set is frozen it can no longer be modified. The benefit of this is that when you call `frozenCopy()` on it, Ember will avoid making copies of the set. This allows you to write code that can know with certainty when the underlying set data will or will not be modified. @class Set @namespace Ember @extends Ember.CoreObject @uses Ember.MutableEnumerable @uses Ember.Copyable @uses Ember.Freezable @since Ember 0.9 */ Ember.Set = Ember.CoreObject.extend(Ember.MutableEnumerable, Ember.Copyable, Ember.Freezable, /** @scope Ember.Set.prototype */ { // .......................................................... // IMPLEMENT ENUMERABLE APIS // /** This property will change as the number of objects in the set changes. @property length @type number @default 0 */ length: 0, /** Clears the set. This is useful if you want to reuse an existing set without having to recreate it. ```javascript var colors = new Ember.Set(["red", "green", "blue"]); colors.length; // 3 colors.clear(); colors.length; // 0 ``` @method clear @return {Ember.Set} An empty Set */ clear: function() { if (this.isFrozen) { throw new Error(Ember.FROZEN_ERROR); } var len = get(this, 'length'); if (len === 0) { return this; } var guid; this.enumerableContentWillChange(len, 0); Ember.propertyWillChange(this, 'firstObject'); Ember.propertyWillChange(this, 'lastObject'); for (var i=0; i < len; i++){ guid = guidFor(this[i]); delete this[guid]; delete this[i]; } set(this, 'length', 0); Ember.propertyDidChange(this, 'firstObject'); Ember.propertyDidChange(this, 'lastObject'); this.enumerableContentDidChange(len, 0); return this; }, /** Returns true if the passed object is also an enumerable that contains the same objects as the receiver. ```javascript var colors = ["red", "green", "blue"], same_colors = new Ember.Set(colors); same_colors.isEqual(colors); // true same_colors.isEqual(["purple", "brown"]); // false ``` @method isEqual @param {Ember.Set} obj the other object. @return {Boolean} */ isEqual: function(obj) { // fail fast if (!Ember.Enumerable.detect(obj)) return false; var loc = get(this, 'length'); if (get(obj, 'length') !== loc) return false; while(--loc >= 0) { if (!obj.contains(this[loc])) return false; } return true; }, /** Adds an object to the set. Only non-`null` objects can be added to a set and those can only be added once. If the object is already in the set or the passed value is null this method will have no effect. This is an alias for `Ember.MutableEnumerable.addObject()`. ```javascript var colors = new Ember.Set(); colors.add("blue"); // ["blue"] colors.add("blue"); // ["blue"] colors.add("red"); // ["blue", "red"] colors.add(null); // ["blue", "red"] colors.add(undefined); // ["blue", "red"] ``` @method add @param {Object} obj The object to add. @return {Ember.Set} The set itself. */ add: Ember.aliasMethod('addObject'), /** Removes the object from the set if it is found. If you pass a `null` value or an object that is already not in the set, this method will have no effect. This is an alias for `Ember.MutableEnumerable.removeObject()`. ```javascript var colors = new Ember.Set(["red", "green", "blue"]); colors.remove("red"); // ["blue", "green"] colors.remove("purple"); // ["blue", "green"] colors.remove(null); // ["blue", "green"] ``` @method remove @param {Object} obj The object to remove @return {Ember.Set} The set itself. */ remove: Ember.aliasMethod('removeObject'), /** Removes the last element from the set and returns it, or `null` if it's empty. ```javascript var colors = new Ember.Set(["green", "blue"]); colors.pop(); // "blue" colors.pop(); // "green" colors.pop(); // null ``` @method pop @return {Object} The removed object from the set or null. */ pop: function() { if (get(this, 'isFrozen')) throw new Error(Ember.FROZEN_ERROR); var obj = this.length > 0 ? this[this.length-1] : null; this.remove(obj); return obj; }, /** Inserts the given object on to the end of the set. It returns the set itself. This is an alias for `Ember.MutableEnumerable.addObject()`. ```javascript var colors = new Ember.Set(); colors.push("red"); // ["red"] colors.push("green"); // ["red", "green"] colors.push("blue"); // ["red", "green", "blue"] ``` @method push @return {Ember.Set} The set itself. */ push: Ember.aliasMethod('addObject'), /** Removes the last element from the set and returns it, or `null` if it's empty. This is an alias for `Ember.Set.pop()`. ```javascript var colors = new Ember.Set(["green", "blue"]); colors.shift(); // "blue" colors.shift(); // "green" colors.shift(); // null ``` @method shift @return {Object} The removed object from the set or null. */ shift: Ember.aliasMethod('pop'), /** Inserts the given object on to the end of the set. It returns the set itself. This is an alias of `Ember.Set.push()` ```javascript var colors = new Ember.Set(); colors.unshift("red"); // ["red"] colors.unshift("green"); // ["red", "green"] colors.unshift("blue"); // ["red", "green", "blue"] ``` @method unshift @return {Ember.Set} The set itself. */ unshift: Ember.aliasMethod('push'), /** Adds each object in the passed enumerable to the set. This is an alias of `Ember.MutableEnumerable.addObjects()` ```javascript var colors = new Ember.Set(); colors.addEach(["red", "green", "blue"]); // ["red", "green", "blue"] ``` @method addEach @param {Ember.Enumerable} objects the objects to add. @return {Ember.Set} The set itself. */ addEach: Ember.aliasMethod('addObjects'), /** Removes each object in the passed enumerable to the set. This is an alias of `Ember.MutableEnumerable.removeObjects()` ```javascript var colors = new Ember.Set(["red", "green", "blue"]); colors.removeEach(["red", "blue"]); // ["green"] ``` @method removeEach @param {Ember.Enumerable} objects the objects to remove. @return {Ember.Set} The set itself. */ removeEach: Ember.aliasMethod('removeObjects'), // .......................................................... // PRIVATE ENUMERABLE SUPPORT // init: function(items) { this._super(); if (items) this.addObjects(items); }, // implement Ember.Enumerable nextObject: function(idx) { return this[idx]; }, // more optimized version firstObject: Ember.computed(function() { return this.length > 0 ? this[0] : undefined; }), // more optimized version lastObject: Ember.computed(function() { return this.length > 0 ? this[this.length-1] : undefined; }), // implements Ember.MutableEnumerable addObject: function(obj) { if (get(this, 'isFrozen')) throw new Error(Ember.FROZEN_ERROR); if (none(obj)) return this; // nothing to do var guid = guidFor(obj), idx = this[guid], len = get(this, 'length'), added ; if (idx>=0 && idx=0 && idx=0; }, copy: function() { var C = this.constructor, ret = new C(), loc = get(this, 'length'); set(ret, 'length', loc); while(--loc>=0) { ret[loc] = this[loc]; ret[guidFor(this[loc])] = loc; } return ret; }, toString: function() { var len = this.length, idx, array = []; for(idx = 0; idx < len; idx++) { array[idx] = this[idx]; } return "Ember.Set<%@>".fmt(array.join(',')); } }); })(); (function() { /** @module ember @submodule ember-runtime */ /** `Ember.Object` is the main base class for all Ember objects. It is a subclass of `Ember.CoreObject` with the `Ember.Observable` mixin applied. For details, see the documentation for each of these. @class Object @namespace Ember @extends Ember.CoreObject @uses Ember.Observable */ Ember.Object = Ember.CoreObject.extend(Ember.Observable); Ember.Object.toString = function() { return "Ember.Object"; }; })(); (function() { /** @module ember @submodule ember-runtime */ var get = Ember.get, indexOf = Ember.ArrayPolyfills.indexOf; /** A Namespace is an object usually used to contain other objects or methods such as an application or framework. Create a namespace anytime you want to define one of these new containers. # Example Usage ```javascript MyFramework = Ember.Namespace.create({ VERSION: '1.0.0' }); ``` @class Namespace @namespace Ember @extends Ember.Object */ var Namespace = Ember.Namespace = Ember.Object.extend({ isNamespace: true, init: function() { Ember.Namespace.NAMESPACES.push(this); Ember.Namespace.PROCESSED = false; }, toString: function() { var name = get(this, 'name'); if (name) { return name; } findNamespaces(); return this[Ember.GUID_KEY+'_name']; }, nameClasses: function() { processNamespace([this.toString()], this, {}); }, destroy: function() { var namespaces = Ember.Namespace.NAMESPACES; Ember.lookup[this.toString()] = undefined; namespaces.splice(indexOf.call(namespaces, this), 1); this._super(); } }); Namespace.reopenClass({ NAMESPACES: [Ember], PROCESSED: false, processAll: processAllNamespaces }); var hasOwnProp = ({}).hasOwnProperty, guidFor = Ember.guidFor; function processNamespace(paths, root, seen) { var idx = paths.length; // Loop over all of the keys in the namespace, looking for classes for(var key in root) { if (!hasOwnProp.call(root, key)) { continue; } var obj = root[key]; // If we are processing the `Ember` namespace, for example, the // `paths` will start with `["Ember"]`. Every iteration through // the loop will update the **second** element of this list with // the key, so processing `Ember.View` will make the Array // `['Ember', 'View']`. paths[idx] = key; // If we have found an unprocessed class if (obj && obj.toString === classToString) { // Replace the class' `toString` with the dot-separated path // and set its `NAME_KEY` obj.toString = makeToString(paths.join('.')); obj[NAME_KEY] = paths.join('.'); // Support nested namespaces } else if (obj && obj.isNamespace) { // Skip aliased namespaces if (seen[guidFor(obj)]) { continue; } seen[guidFor(obj)] = true; // Process the child namespace processNamespace(paths, obj, seen); } } paths.length = idx; // cut out last item } function findNamespaces() { var Namespace = Ember.Namespace, lookup = Ember.lookup, obj, isNamespace; if (Namespace.PROCESSED) { return; } for (var prop in lookup) { // These don't raise exceptions but can cause warnings if (prop === "parent" || prop === "top" || prop === "frameElement") { continue; } // get(window.globalStorage, 'isNamespace') would try to read the storage for domain isNamespace and cause exception in Firefox. // globalStorage is a storage obsoleted by the WhatWG storage specification. See https://developer.mozilla.org/en/DOM/Storage#globalStorage if (prop === "globalStorage" && lookup.StorageList && lookup.globalStorage instanceof lookup.StorageList) { continue; } // Unfortunately, some versions of IE don't support window.hasOwnProperty if (lookup.hasOwnProperty && !lookup.hasOwnProperty(prop)) { continue; } // At times we are not allowed to access certain properties for security reasons. // There are also times where even if we can access them, we are not allowed to access their properties. try { obj = Ember.lookup[prop]; isNamespace = obj && obj.isNamespace; } catch (e) { continue; } if (isNamespace) { obj[NAME_KEY] = prop; } } } var NAME_KEY = Ember.NAME_KEY = Ember.GUID_KEY + '_name'; function superClassString(mixin) { var superclass = mixin.superclass; if (superclass) { if (superclass[NAME_KEY]) { return superclass[NAME_KEY]; } else { return superClassString(superclass); } } else { return; } } function classToString() { if (!Ember.BOOTED && !this[NAME_KEY]) { processAllNamespaces(); } var ret; if (this[NAME_KEY]) { ret = this[NAME_KEY]; } else { var str = superClassString(this); if (str) { ret = "(subclass of " + str + ")"; } else { ret = "(unknown mixin)"; } this.toString = makeToString(ret); } return ret; } function processAllNamespaces() { if (!Namespace.PROCESSED) { findNamespaces(); Namespace.PROCESSED = true; } if (Ember.anyUnprocessedMixins) { var namespaces = Namespace.NAMESPACES, namespace; for (var i=0, l=namespaces.length; i=idx) { var item = content.objectAt(loc); if (item) { Ember.addBeforeObserver(item, keyName, proxy, 'contentKeyWillChange'); Ember.addObserver(item, keyName, proxy, 'contentKeyDidChange'); // keep track of the indicies each item was found at so we can map // it back when the obj changes. guid = guidFor(item); if (!objects[guid]) objects[guid] = []; objects[guid].push(loc); } } } function removeObserverForContentKey(content, keyName, proxy, idx, loc) { var objects = proxy._objects; if (!objects) objects = proxy._objects = {}; var indicies, guid; while(--loc>=idx) { var item = content.objectAt(loc); if (item) { Ember.removeBeforeObserver(item, keyName, proxy, 'contentKeyWillChange'); Ember.removeObserver(item, keyName, proxy, 'contentKeyDidChange'); guid = guidFor(item); indicies = objects[guid]; indicies[indicies.indexOf(loc)] = null; } } } /** This is the object instance returned when you get the `@each` property on an array. It uses the unknownProperty handler to automatically create EachArray instances for property names. @private @class EachProxy @namespace Ember @extends Ember.Object */ Ember.EachProxy = Ember.Object.extend({ init: function(content) { this._super(); this._content = content; content.addArrayObserver(this); // in case someone is already observing some keys make sure they are // added forEach(Ember.watchedEvents(this), function(eventName) { this.didAddListener(eventName); }, this); }, /** You can directly access mapped properties by simply requesting them. The `unknownProperty` handler will generate an EachArray of each item. @method unknownProperty @param keyName {String} @param value {anything} */ unknownProperty: function(keyName, value) { var ret; ret = new EachArray(this._content, keyName, this); Ember.defineProperty(this, keyName, null, ret); this.beginObservingContentKey(keyName); return ret; }, // .......................................................... // ARRAY CHANGES // Invokes whenever the content array itself changes. arrayWillChange: function(content, idx, removedCnt, addedCnt) { var keys = this._keys, key, array, lim; lim = removedCnt>0 ? idx+removedCnt : -1; Ember.beginPropertyChanges(this); for(key in keys) { if (!keys.hasOwnProperty(key)) { continue; } if (lim>0) removeObserverForContentKey(content, key, this, idx, lim); Ember.propertyWillChange(this, key); } Ember.propertyWillChange(this._content, '@each'); Ember.endPropertyChanges(this); }, arrayDidChange: function(content, idx, removedCnt, addedCnt) { var keys = this._keys, key, array, lim; lim = addedCnt>0 ? idx+addedCnt : -1; Ember.beginPropertyChanges(this); for(key in keys) { if (!keys.hasOwnProperty(key)) { continue; } if (lim>0) addObserverForContentKey(content, key, this, idx, lim); Ember.propertyDidChange(this, key); } Ember.propertyDidChange(this._content, '@each'); Ember.endPropertyChanges(this); }, // .......................................................... // LISTEN FOR NEW OBSERVERS AND OTHER EVENT LISTENERS // Start monitoring keys based on who is listening... didAddListener: function(eventName) { if (IS_OBSERVER.test(eventName)) { this.beginObservingContentKey(eventName.slice(0, -7)); } }, didRemoveListener: function(eventName) { if (IS_OBSERVER.test(eventName)) { this.stopObservingContentKey(eventName.slice(0, -7)); } }, // .......................................................... // CONTENT KEY OBSERVING // Actual watch keys on the source content. beginObservingContentKey: function(keyName) { var keys = this._keys; if (!keys) keys = this._keys = {}; if (!keys[keyName]) { keys[keyName] = 1; var content = this._content, len = get(content, 'length'); addObserverForContentKey(content, keyName, this, 0, len); } else { keys[keyName]++; } }, stopObservingContentKey: function(keyName) { var keys = this._keys; if (keys && (keys[keyName]>0) && (--keys[keyName]<=0)) { var content = this._content, len = get(content, 'length'); removeObserverForContentKey(content, keyName, this, 0, len); } }, contentKeyWillChange: function(obj, keyName) { Ember.propertyWillChange(this, keyName); }, contentKeyDidChange: function(obj, keyName) { Ember.propertyDidChange(this, keyName); } }); })(); (function() { /** @module ember @submodule ember-runtime */ var get = Ember.get, set = Ember.set; // Add Ember.Array to Array.prototype. Remove methods with native // implementations and supply some more optimized versions of generic methods // because they are so common. var NativeArray = Ember.Mixin.create(Ember.MutableArray, Ember.Observable, Ember.Copyable, { // because length is a built-in property we need to know to just get the // original property. get: function(key) { if (key==='length') return this.length; else if ('number' === typeof key) return this[key]; else return this._super(key); }, objectAt: function(idx) { return this[idx]; }, // primitive for array support. replace: function(idx, amt, objects) { if (this.isFrozen) throw Ember.FROZEN_ERROR ; // if we replaced exactly the same number of items, then pass only the // replaced range. Otherwise, pass the full remaining array length // since everything has shifted var len = objects ? get(objects, 'length') : 0; this.arrayContentWillChange(idx, amt, len); if (!objects || objects.length === 0) { this.splice(idx, amt) ; } else { var args = [idx, amt].concat(objects) ; this.splice.apply(this,args) ; } this.arrayContentDidChange(idx, amt, len); return this ; }, // If you ask for an unknown property, then try to collect the value // from member items. unknownProperty: function(key, value) { var ret;// = this.reducedProperty(key, value) ; if ((value !== undefined) && ret === undefined) { ret = this[key] = value; } return ret ; }, // If browser did not implement indexOf natively, then override with // specialized version indexOf: function(object, startAt) { var idx, len = this.length; if (startAt === undefined) startAt = 0; else startAt = (startAt < 0) ? Math.ceil(startAt) : Math.floor(startAt); if (startAt < 0) startAt += len; for(idx=startAt;idx=0;idx--) { if (this[idx] === object) return idx ; } return -1; }, copy: function(deep) { if (deep) { return this.map(function(item){ return Ember.copy(item, true); }); } return this.slice(); } }); // Remove any methods implemented natively so we don't override them var ignore = ['length']; Ember.EnumerableUtils.forEach(NativeArray.keys(), function(methodName) { if (Array.prototype[methodName]) ignore.push(methodName); }); if (ignore.length>0) { NativeArray = NativeArray.without.apply(NativeArray, ignore); } /** The NativeArray mixin contains the properties needed to to make the native Array support Ember.MutableArray and all of its dependent APIs. Unless you have `Ember.EXTEND_PROTOTYPES or `Ember.EXTEND_PROTOTYPES.Array` set to false, this will be applied automatically. Otherwise you can apply the mixin at anytime by calling `Ember.NativeArray.activate`. @class NativeArray @namespace Ember @extends Ember.Mixin @uses Ember.MutableArray @uses Ember.MutableEnumerable @uses Ember.Copyable @uses Ember.Freezable */ Ember.NativeArray = NativeArray; /** Creates an `Ember.NativeArray` from an Array like object. Does not modify the original object. @method A @for Ember @return {Ember.NativeArray} */ Ember.A = function(arr){ if (arr === undefined) { arr = []; } return Ember.Array.detect(arr) ? arr : Ember.NativeArray.apply(arr); }; /** Activates the mixin on the Array.prototype if not already applied. Calling this method more than once is safe. @method activate @for Ember.NativeArray @static @return {void} */ Ember.NativeArray.activate = function() { NativeArray.apply(Array.prototype); Ember.A = function(arr) { return arr || []; }; }; if (Ember.EXTEND_PROTOTYPES === true || Ember.EXTEND_PROTOTYPES.Array) { Ember.NativeArray.activate(); } })(); (function() { var DeferredMixin = Ember.DeferredMixin, // mixins/deferred EmberObject = Ember.Object, // system/object get = Ember.get; var Deferred = Ember.Object.extend(DeferredMixin); Deferred.reopenClass({ promise: function(callback, binding) { var deferred = Deferred.create(); callback.call(binding, deferred); return get(deferred, 'promise'); } }); Ember.Deferred = Deferred; })(); (function() { /** @module ember @submodule ember-runtime */ var loadHooks = Ember.ENV.EMBER_LOAD_HOOKS || {}; var loaded = {}; /** @method onLoad @for Ember @param name {String} name of hook @param callback {Function} callback to be called */ Ember.onLoad = function(name, callback) { var object; loadHooks[name] = loadHooks[name] || Ember.A(); loadHooks[name].pushObject(callback); if (object = loaded[name]) { callback(object); } }; /** @method runLoadHooks @for Ember @param name {String} name of hook @param object {Object} object to pass to callbacks */ Ember.runLoadHooks = function(name, object) { var hooks; loaded[name] = object; if (hooks = loadHooks[name]) { loadHooks[name].forEach(function(callback) { callback(object); }); } }; })(); (function() { })(); (function() { var get = Ember.get; /** @module ember @submodule ember-runtime */ /** `Ember.ControllerMixin` provides a standard interface for all classes that compose Ember's controller layer: `Ember.Controller`, `Ember.ArrayController`, and `Ember.ObjectController`. Within an `Ember.Router`-managed application single shared instaces of every Controller object in your application's namespace will be added to the application's `Ember.Router` instance. See `Ember.Application#initialize` for additional information. ## Views By default a controller instance will be the rendering context for its associated `Ember.View.` This connection is made during calls to `Ember.ControllerMixin#connectOutlet`. Within the view's template, the `Ember.View` instance can be accessed through the controller with `{{view}}`. ## Target Forwarding By default a controller will target your application's `Ember.Router` instance. Calls to `{{action}}` within the template of a controller's view are forwarded to the router. See `Ember.Handlebars.helpers.action` for additional information. @class ControllerMixin @namespace Ember @extends Ember.Mixin */ Ember.ControllerMixin = Ember.Mixin.create({ /* ducktype as a controller */ isController: true, /** The object to which events from the view should be sent. For example, when a Handlebars template uses the `{{action}}` helper, it will attempt to send the event to the view's controller's `target`. By default, a controller's `target` is set to the router after it is instantiated by `Ember.Application#initialize`. @property target @default null */ target: null, container: null, store: null, model: Ember.computed.alias('content'), send: function(actionName) { var args = [].slice.call(arguments, 1), target; if (this[actionName]) { this[actionName].apply(this, args); } else if(target = get(this, 'target')) { target.send.apply(target, arguments); } } }); /** @class Controller @namespace Ember @extends Ember.Object @uses Ember.ControllerMixin */ Ember.Controller = Ember.Object.extend(Ember.ControllerMixin); })(); (function() { /** @module ember @submodule ember-runtime */ var get = Ember.get, set = Ember.set, forEach = Ember.EnumerableUtils.forEach; /** `Ember.SortableMixin` provides a standard interface for array proxies to specify a sort order and maintain this sorting when objects are added, removed, or updated without changing the implicit order of their underlying content array: ```javascript songs = [ {trackNumber: 4, title: 'Ob-La-Di, Ob-La-Da'}, {trackNumber: 2, title: 'Back in the U.S.S.R.'}, {trackNumber: 3, title: 'Glass Onion'}, ]; songsController = Ember.ArrayController.create({ content: songs, sortProperties: ['trackNumber'], sortAscending: true }); songsController.get('firstObject'); // {trackNumber: 2, title: 'Back in the U.S.S.R.'} songsController.addObject({trackNumber: 1, title: 'Dear Prudence'}); songsController.get('firstObject'); // {trackNumber: 1, title: 'Dear Prudence'} ``` @class SortableMixin @namespace Ember @extends Ember.Mixin @uses Ember.MutableEnumerable */ Ember.SortableMixin = Ember.Mixin.create(Ember.MutableEnumerable, { /** Specifies which properties dictate the arrangedContent's sort order. @property {Array} sortProperties */ sortProperties: null, /** Specifies the arrangedContent's sort direction @property {Boolean} sortAscending */ sortAscending: true, orderBy: function(item1, item2) { var result = 0, sortProperties = get(this, 'sortProperties'), sortAscending = get(this, 'sortAscending'); forEach(sortProperties, function(propertyName) { if (result === 0) { result = Ember.compare(get(item1, propertyName), get(item2, propertyName)); if ((result !== 0) && !sortAscending) { result = (-1) * result; } } }); return result; }, destroy: function() { var content = get(this, 'content'), sortProperties = get(this, 'sortProperties'); if (content && sortProperties) { forEach(content, function(item) { forEach(sortProperties, function(sortProperty) { Ember.removeObserver(item, sortProperty, this, 'contentItemSortPropertyDidChange'); }, this); }, this); } return this._super(); }, isSorted: Ember.computed.bool('sortProperties'), arrangedContent: Ember.computed('content', 'sortProperties.@each', function(key, value) { var content = get(this, 'content'), isSorted = get(this, 'isSorted'), sortProperties = get(this, 'sortProperties'), self = this; if (content && isSorted) { content = content.slice(); content.sort(function(item1, item2) { return self.orderBy(item1, item2); }); forEach(content, function(item) { forEach(sortProperties, function(sortProperty) { Ember.addObserver(item, sortProperty, this, 'contentItemSortPropertyDidChange'); }, this); }, this); return Ember.A(content); } return content; }), _contentWillChange: Ember.beforeObserver(function() { var content = get(this, 'content'), sortProperties = get(this, 'sortProperties'); if (content && sortProperties) { forEach(content, function(item) { forEach(sortProperties, function(sortProperty) { Ember.removeObserver(item, sortProperty, this, 'contentItemSortPropertyDidChange'); }, this); }, this); } this._super(); }, 'content'), sortAscendingWillChange: Ember.beforeObserver(function() { this._lastSortAscending = get(this, 'sortAscending'); }, 'sortAscending'), sortAscendingDidChange: Ember.observer(function() { if (get(this, 'sortAscending') !== this._lastSortAscending) { var arrangedContent = get(this, 'arrangedContent'); arrangedContent.reverseObjects(); } }, 'sortAscending'), contentArrayWillChange: function(array, idx, removedCount, addedCount) { var isSorted = get(this, 'isSorted'); if (isSorted) { var arrangedContent = get(this, 'arrangedContent'); var removedObjects = array.slice(idx, idx+removedCount); var sortProperties = get(this, 'sortProperties'); forEach(removedObjects, function(item) { arrangedContent.removeObject(item); forEach(sortProperties, function(sortProperty) { Ember.removeObserver(item, sortProperty, this, 'contentItemSortPropertyDidChange'); }, this); }, this); } return this._super(array, idx, removedCount, addedCount); }, contentArrayDidChange: function(array, idx, removedCount, addedCount) { var isSorted = get(this, 'isSorted'), sortProperties = get(this, 'sortProperties'); if (isSorted) { var addedObjects = array.slice(idx, idx+addedCount); var arrangedContent = get(this, 'arrangedContent'); forEach(addedObjects, function(item) { this.insertItemSorted(item); forEach(sortProperties, function(sortProperty) { Ember.addObserver(item, sortProperty, this, 'contentItemSortPropertyDidChange'); }, this); }, this); } return this._super(array, idx, removedCount, addedCount); }, insertItemSorted: function(item) { var arrangedContent = get(this, 'arrangedContent'); var length = get(arrangedContent, 'length'); var idx = this._binarySearch(item, 0, length); arrangedContent.insertAt(idx, item); }, contentItemSortPropertyDidChange: function(item) { var arrangedContent = get(this, 'arrangedContent'), oldIndex = arrangedContent.indexOf(item), leftItem = arrangedContent.objectAt(oldIndex - 1), rightItem = arrangedContent.objectAt(oldIndex + 1), leftResult = leftItem && this.orderBy(item, leftItem), rightResult = rightItem && this.orderBy(item, rightItem); if (leftResult < 0 || rightResult > 0) { arrangedContent.removeObject(item); this.insertItemSorted(item); } }, _binarySearch: function(item, low, high) { var mid, midItem, res, arrangedContent; if (low === high) { return low; } arrangedContent = get(this, 'arrangedContent'); mid = low + Math.floor((high - low) / 2); midItem = arrangedContent.objectAt(mid); res = this.orderBy(midItem, item); if (res < 0) { return this._binarySearch(item, mid+1, high); } else if (res > 0) { return this._binarySearch(item, low, mid); } return mid; } }); })(); (function() { /** @module ember @submodule ember-runtime */ var get = Ember.get, set = Ember.set, isGlobalPath = Ember.isGlobalPath, forEach = Ember.EnumerableUtils.forEach, replace = Ember.EnumerableUtils.replace; /** `Ember.ArrayController` provides a way for you to publish a collection of objects so that you can easily bind to the collection from a Handlebars `#each` helper, an `Ember.CollectionView`, or other controllers. The advantage of using an `ArrayController` is that you only have to set up your view bindings once; to change what's displayed, simply swap out the `content` property on the controller. For example, imagine you wanted to display a list of items fetched via an XHR request. Create an `Ember.ArrayController` and set its `content` property: ```javascript MyApp.listController = Ember.ArrayController.create(); $.get('people.json', function(data) { MyApp.listController.set('content', data); }); ``` Then, create a view that binds to your new controller: ```handlebars {{#each MyApp.listController}} {{firstName}} {{lastName}} {{/each}} ``` Although you are binding to the controller, the behavior of this controller is to pass through any methods or properties to the underlying array. This capability comes from `Ember.ArrayProxy`, which this class inherits from. Sometimes you want to display computed properties within the body of an `#each` helper that depend on the underlying items in `content`, but are not present on those items. To do this, set `itemController` to the name of a controller (probably an `ObjectController`) that will wrap each individual item. For example: ```handlebars {{#each post in controller}}
  • {{title}} ({{titleLength}} characters)
  • {{/each}} ``` ```javascript App.PostsController = Ember.ArrayController.extend({ itemController: 'post' }); App.PostController = Ember.ObjectController.extend({ // the `title` property will be proxied to the underlying post. titleLength: function() { return this.get('title').length; }.property('title') }); ``` In some cases it is helpful to return a different `itemController` depending on the particular item. Subclasses can do this by overriding `lookupItemController`. For example: ```javascript App.MyArrayController = Ember.ArrayController.extend({ lookupItemController: function( object ) { if (object.get('isSpecial')) { return "special"; // use App.SpecialController } else { return "regular"; // use App.RegularController } } }); ``` @class ArrayController @namespace Ember @extends Ember.ArrayProxy @uses Ember.SortableMixin @uses Ember.ControllerMixin */ Ember.ArrayController = Ember.ArrayProxy.extend(Ember.ControllerMixin, Ember.SortableMixin, { /** The controller used to wrap items, if any. @property itemController @type String @default null */ itemController: null, /** Return the name of the controller to wrap items, or `null` if items should be returned directly. The default implementation simply returns the `itemController` property, but subclasses can override this method to return different controllers for different objects. For example: ```javascript App.MyArrayController = Ember.ArrayController.extend({ lookupItemController: function( object ) { if (object.get('isSpecial')) { return "special"; // use App.SpecialController } else { return "regular"; // use App.RegularController } } }); ``` @method @type String @default null */ lookupItemController: function(object) { return get(this, 'itemController'); }, objectAtContent: function(idx) { var length = get(this, 'length'), object = get(this,'arrangedContent').objectAt(idx), controllerClass = this.lookupItemController(object); if (controllerClass && idx < length) { return this.controllerAt(idx, object, controllerClass); } else { // When controllerClass is falsy we have not opted in to using item // controllers, so return the object directly. However, when // controllerClass is defined but the index is out of range, we want to // return the "out of range" value, whatever that might be. Rather than // make assumptions (e.g. guessing `null` or `undefined`) we defer this to // `arrangedContent`. return object; } }, arrangedContentDidChange: function() { this._super(); this._resetSubContainers(); }, arrayContentDidChange: function(idx, removedCnt, addedCnt) { var subContainers = get(this, 'subContainers'), subContainersToRemove = subContainers.slice(idx, idx+removedCnt); forEach(subContainersToRemove, function(subContainer) { if (subContainer) { subContainer.destroy(); } }); replace(subContainers, idx, removedCnt, new Array(addedCnt)); // The shadow array of subcontainers must be updated before we trigger // observers, otherwise observers will get the wrong subcontainer when // calling `objectAt` this._super(idx, removedCnt, addedCnt); }, init: function() { this._super(); this._resetSubContainers(); }, controllerAt: function(idx, object, controllerClass) { var container = get(this, 'container'), subContainers = get(this, 'subContainers'), subContainer = subContainers[idx], controller; if (!subContainer) { subContainer = subContainers[idx] = container.child(); } controller = subContainer.lookup("controller:" + controllerClass); if (!controller) { throw new Error('Could not resolve itemController: "' + controllerClass + '"'); } controller.set('target', this); controller.set('content', object); return controller; }, subContainers: null, _resetSubContainers: function() { var subContainers = get(this, 'subContainers'); if (subContainers) { forEach(subContainers, function(subContainer) { if (subContainer) { subContainer.destroy(); } }); } this.set('subContainers', Ember.A()); } }); })(); (function() { /** @module ember @submodule ember-runtime */ /** `Ember.ObjectController` is part of Ember's Controller layer. A single shared instance of each `Ember.ObjectController` subclass in your application's namespace will be created at application initialization and be stored on your application's `Ember.Router` instance. `Ember.ObjectController` derives its functionality from its superclass `Ember.ObjectProxy` and the `Ember.ControllerMixin` mixin. @class ObjectController @namespace Ember @extends Ember.ObjectProxy @uses Ember.ControllerMixin **/ Ember.ObjectController = Ember.ObjectProxy.extend(Ember.ControllerMixin); })(); (function() { })(); (function() { /** Ember Runtime @module ember @submodule ember-runtime @requires ember-metal */ })(); (function() { /** @module ember @submodule ember-views */ var jQuery = Ember.imports.jQuery; /** Alias for jQuery @method $ @for Ember */ Ember.$ = jQuery; })(); (function() { /** @module ember @submodule ember-views */ // http://www.whatwg.org/specs/web-apps/current-work/multipage/dnd.html#dndevents var dragEvents = Ember.String.w('dragstart drag dragenter dragleave dragover drop dragend'); // Copies the `dataTransfer` property from a browser event object onto the // jQuery event object for the specified events Ember.EnumerableUtils.forEach(dragEvents, function(eventName) { Ember.$.event.fixHooks[eventName] = { props: ['dataTransfer'] }; }); })(); (function() { /** @module ember @submodule ember-views */ /*** BEGIN METAMORPH HELPERS ***/ // Internet Explorer prior to 9 does not allow setting innerHTML if the first element // is a "zero-scope" element. This problem can be worked around by making // the first node an invisible text node. We, like Modernizr, use ­ var needsShy = (function(){ var testEl = document.createElement('div'); testEl.innerHTML = "
    "; testEl.firstChild.innerHTML = ""; return testEl.firstChild.innerHTML === ''; })(); // IE 8 (and likely earlier) likes to move whitespace preceeding // a script tag to appear after it. This means that we can // accidentally remove whitespace when updating a morph. var movesWhitespace = (function() { var testEl = document.createElement('div'); testEl.innerHTML = "Test: Value"; return testEl.childNodes[0].nodeValue === 'Test:' && testEl.childNodes[2].nodeValue === ' Value'; })(); // Use this to find children by ID instead of using jQuery var findChildById = function(element, id) { if (element.getAttribute('id') === id) { return element; } var len = element.childNodes.length, idx, node, found; for (idx=0; idx 0) { var len = matches.length, idx; for (idx=0; idxTest'); canSet = el.options.length === 1; } innerHTMLTags[tagName] = canSet; return canSet; }; var setInnerHTML = function(element, html) { var tagName = element.tagName; if (canSetInnerHTML(tagName)) { setInnerHTMLWithoutFix(element, html); } else { var startTag = element.outerHTML.match(new RegExp("<"+tagName+"([^>]*)>", 'i'))[0], endTag = ''; var wrapper = document.createElement('div'); setInnerHTMLWithoutFix(wrapper, startTag + html + endTag); element = wrapper.firstChild; while (element.tagName !== tagName) { element = element.nextSibling; } } return element; }; function isSimpleClick(event) { var modifier = event.shiftKey || event.metaKey || event.altKey || event.ctrlKey, secondaryClick = event.which > 1; // IE9 may return undefined return !modifier && !secondaryClick; } Ember.ViewUtils = { setInnerHTML: setInnerHTML, isSimpleClick: isSimpleClick }; })(); (function() { /** @module ember @submodule ember-views */ var get = Ember.get, set = Ember.set; var indexOf = Ember.ArrayPolyfills.indexOf; var ClassSet = function() { this.seen = {}; this.list = []; }; ClassSet.prototype = { add: function(string) { if (string in this.seen) { return; } this.seen[string] = true; this.list.push(string); }, toDOM: function() { return this.list.join(" "); } }; /** `Ember.RenderBuffer` gathers information regarding the a view and generates the final representation. `Ember.RenderBuffer` will generate HTML which can be pushed to the DOM. @class RenderBuffer @namespace Ember @constructor */ Ember.RenderBuffer = function(tagName) { return new Ember._RenderBuffer(tagName); }; Ember._RenderBuffer = function(tagName) { this.tagNames = [tagName || null]; this.buffer = []; }; Ember._RenderBuffer.prototype = /** @scope Ember.RenderBuffer.prototype */ { // The root view's element _element: null, /** @private An internal set used to de-dupe class names when `addClass()` is used. After each call to `addClass()`, the `classes` property will be updated. @property elementClasses @type Array @default [] */ elementClasses: null, /** Array of class names which will be applied in the class attribute. You can use `setClasses()` to set this property directly. If you use `addClass()`, it will be maintained for you. @property classes @type Array @default [] */ classes: null, /** The id in of the element, to be applied in the id attribute. You should not set this property yourself, rather, you should use the `id()` method of `Ember.RenderBuffer`. @property elementId @type String @default null */ elementId: null, /** A hash keyed on the name of the attribute and whose value will be applied to that attribute. For example, if you wanted to apply a `data-view="Foo.bar"` property to an element, you would set the elementAttributes hash to `{'data-view':'Foo.bar'}`. You should not maintain this hash yourself, rather, you should use the `attr()` method of `Ember.RenderBuffer`. @property elementAttributes @type Hash @default {} */ elementAttributes: null, /** The value for this attribute. Values cannot be set via attr after jQuery 1.9, they need to be set with val() instead. You should not maintain this value yourself, rather, you should use the `val()` method of `Ember.RenderBuffer`. @property elementValue @type String @default null */ elementValue: null, /** The tagname of the element an instance of `Ember.RenderBuffer` represents. Usually, this gets set as the first parameter to `Ember.RenderBuffer`. For example, if you wanted to create a `p` tag, then you would call ```javascript Ember.RenderBuffer('p') ``` @property elementTag @type String @default null */ elementTag: null, /** A hash keyed on the name of the style attribute and whose value will be applied to that attribute. For example, if you wanted to apply a `background-color:black;` style to an element, you would set the elementStyle hash to `{'background-color':'black'}`. You should not maintain this hash yourself, rather, you should use the `style()` method of `Ember.RenderBuffer`. @property elementStyle @type Hash @default {} */ elementStyle: null, /** Nested `RenderBuffers` will set this to their parent `RenderBuffer` instance. @property parentBuffer @type Ember._RenderBuffer */ parentBuffer: null, /** Adds a string of HTML to the `RenderBuffer`. @method push @param {String} string HTML to push into the buffer @chainable */ push: function(string) { this.buffer.push(string); return this; }, /** Adds a class to the buffer, which will be rendered to the class attribute. @method addClass @param {String} className Class name to add to the buffer @chainable */ addClass: function(className) { // lazily create elementClasses var elementClasses = this.elementClasses = (this.elementClasses || new ClassSet()); this.elementClasses.add(className); this.classes = this.elementClasses.list; return this; }, setClasses: function(classNames) { this.classes = classNames; }, /** Sets the elementID to be used for the element. @method id @param {String} id @chainable */ id: function(id) { this.elementId = id; return this; }, // duck type attribute functionality like jQuery so a render buffer // can be used like a jQuery object in attribute binding scenarios. /** Adds an attribute which will be rendered to the element. @method attr @param {String} name The name of the attribute @param {String} value The value to add to the attribute @chainable @return {Ember.RenderBuffer|String} this or the current attribute value */ attr: function(name, value) { var attributes = this.elementAttributes = (this.elementAttributes || {}); if (arguments.length === 1) { return attributes[name]; } else { attributes[name] = value; } return this; }, /** Adds an value which will be rendered to the element. @method val @param {String} value The value to set @chainable @return {Ember.RenderBuffer|String} this or the current value */ val: function(value) { var elementValue = this.elementValue; if (arguments.length === 0) { return elementValue; } else { this.elementValue = value; } return this; }, /** Remove an attribute from the list of attributes to render. @method removeAttr @param {String} name The name of the attribute @chainable */ removeAttr: function(name) { var attributes = this.elementAttributes; if (attributes) { delete attributes[name]; } return this; }, /** Adds a style to the style attribute which will be rendered to the element. @method style @param {String} name Name of the style @param {String} value @chainable */ style: function(name, value) { var style = this.elementStyle = (this.elementStyle || {}); this.elementStyle[name] = value; return this; }, begin: function(tagName) { this.tagNames.push(tagName || null); return this; }, pushOpeningTag: function() { var tagName = this.currentTagName(); if (!tagName) { return; } if (!this._element && this.buffer.length === 0) { this._element = this.generateElement(); return; } var buffer = this.buffer, id = this.elementId, classes = this.classes, attrs = this.elementAttributes, value = this.elementValue, style = this.elementStyle, prop; buffer.push('<' + tagName); if (id) { buffer.push(' id="' + this._escapeAttribute(id) + '"'); this.elementId = null; } if (classes) { buffer.push(' class="' + this._escapeAttribute(classes.join(' ')) + '"'); this.classes = null; } if (style) { buffer.push(' style="'); for (prop in style) { if (style.hasOwnProperty(prop)) { buffer.push(prop + ':' + this._escapeAttribute(style[prop]) + ';'); } } buffer.push('"'); this.elementStyle = null; } if (attrs) { for (prop in attrs) { if (attrs.hasOwnProperty(prop)) { buffer.push(' ' + prop + '="' + this._escapeAttribute(attrs[prop]) + '"'); } } this.elementAttributes = null; } if (value) { buffer.push(' value="' + this._escapeAttribute(value) + '"'); this.elementValue = null; } buffer.push('>'); }, pushClosingTag: function() { var tagName = this.tagNames.pop(); if (tagName) { this.buffer.push(''); } }, currentTagName: function() { return this.tagNames[this.tagNames.length-1]; }, generateElement: function() { var tagName = this.tagNames.pop(), // pop since we don't need to close element = document.createElement(tagName), $element = Ember.$(element), id = this.elementId, classes = this.classes, attrs = this.elementAttributes, value = this.elementValue, style = this.elementStyle, styleBuffer = '', prop; if (id) { $element.attr('id', id); this.elementId = null; } if (classes) { $element.attr('class', classes.join(' ')); this.classes = null; } if (style) { for (prop in style) { if (style.hasOwnProperty(prop)) { styleBuffer += (prop + ':' + style[prop] + ';'); } } $element.attr('style', styleBuffer); this.elementStyle = null; } if (attrs) { for (prop in attrs) { if (attrs.hasOwnProperty(prop)) { $element.attr(prop, attrs[prop]); } } this.elementAttributes = null; } if (value) { $element.val(value); this.elementValue = null; } return element; }, /** @method element @return {DOMElement} The element corresponding to the generated HTML of this buffer */ element: function() { var html = this.innerString(); if (html) { this._element = Ember.ViewUtils.setInnerHTML(this._element, html); } return this._element; }, /** Generates the HTML content for this buffer. @method string @return {String} The generated HTML */ string: function() { if (this._element) { return this.element().outerHTML; } else { return this.innerString(); } }, innerString: function() { return this.buffer.join(''); }, _escapeAttribute: function(value) { // Stolen shamelessly from Handlebars var escape = { "<": "<", ">": ">", '"': """, "'": "'", "`": "`" }; var badChars = /&(?!\w+;)|[<>"'`]/g; var possible = /[&<>"'`]/; var escapeChar = function(chr) { return escape[chr] || "&"; }; var string = value.toString(); if(!possible.test(string)) { return string; } return string.replace(badChars, escapeChar); } }; })(); (function() { /** @module ember @submodule ember-views */ var get = Ember.get, set = Ember.set, fmt = Ember.String.fmt; /** `Ember.EventDispatcher` handles delegating browser events to their corresponding `Ember.Views.` For example, when you click on a view, `Ember.EventDispatcher` ensures that that view's `mouseDown` method gets called. @class EventDispatcher @namespace Ember @private @extends Ember.Object */ Ember.EventDispatcher = Ember.Object.extend( /** @scope Ember.EventDispatcher.prototype */{ /** @private The root DOM element to which event listeners should be attached. Event listeners will be attached to the document unless this is overridden. Can be specified as a DOMElement or a selector string. The default body is a string since this may be evaluated before document.body exists in the DOM. @property rootElement @type DOMElement @default 'body' */ rootElement: 'body', /** @private Sets up event listeners for standard browser events. This will be called after the browser sends a `DOMContentReady` event. By default, it will set up all of the listeners on the document body. If you would like to register the listeners on a different element, set the event dispatcher's `root` property. @method setup @param addedEvents {Hash} */ setup: function(addedEvents) { var event, events = { touchstart : 'touchStart', touchmove : 'touchMove', touchend : 'touchEnd', touchcancel : 'touchCancel', keydown : 'keyDown', keyup : 'keyUp', keypress : 'keyPress', mousedown : 'mouseDown', mouseup : 'mouseUp', contextmenu : 'contextMenu', click : 'click', dblclick : 'doubleClick', mousemove : 'mouseMove', focusin : 'focusIn', focusout : 'focusOut', mouseenter : 'mouseEnter', mouseleave : 'mouseLeave', submit : 'submit', input : 'input', change : 'change', dragstart : 'dragStart', drag : 'drag', dragenter : 'dragEnter', dragleave : 'dragLeave', dragover : 'dragOver', drop : 'drop', dragend : 'dragEnd' }; Ember.$.extend(events, addedEvents || {}); var rootElement = Ember.$(get(this, 'rootElement')); rootElement.addClass('ember-application'); for (event in events) { if (events.hasOwnProperty(event)) { this.setupHandler(rootElement, event, events[event]); } } }, /** @private Registers an event listener on the document. If the given event is triggered, the provided event handler will be triggered on the target view. If the target view does not implement the event handler, or if the handler returns `false`, the parent view will be called. The event will continue to bubble to each successive parent view until it reaches the top. For example, to have the `mouseDown` method called on the target view when a `mousedown` event is received from the browser, do the following: ```javascript setupHandler('mousedown', 'mouseDown'); ``` @method setupHandler @param {Element} rootElement @param {String} event the browser-originated event to listen to @param {String} eventName the name of the method to call on the view */ setupHandler: function(rootElement, event, eventName) { var self = this; rootElement.delegate('.ember-view', event + '.ember', function(evt, triggeringManager) { return Ember.handleErrors(function() { var view = Ember.View.views[this.id], result = true, manager = null; manager = self._findNearestEventManager(view,eventName); if (manager && manager !== triggeringManager) { result = self._dispatchEvent(manager, evt, eventName, view); } else if (view) { result = self._bubbleEvent(view,evt,eventName); } else { evt.stopPropagation(); } return result; }, this); }); rootElement.delegate('[data-ember-action]', event + '.ember', function(evt) { return Ember.handleErrors(function() { var actionId = Ember.$(evt.currentTarget).attr('data-ember-action'), action = Ember.Handlebars.ActionHelper.registeredActions[actionId]; // We have to check for action here since in some cases, jQuery will trigger // an event on `removeChild` (i.e. focusout) after we've already torn down the // action handlers for the view. if (action && action.eventName === eventName) { return action.handler(evt); } }, this); }); }, _findNearestEventManager: function(view, eventName) { var manager = null; while (view) { manager = get(view, 'eventManager'); if (manager && manager[eventName]) { break; } view = get(view, 'parentView'); } return manager; }, _dispatchEvent: function(object, evt, eventName, view) { var result = true; var handler = object[eventName]; if (Ember.typeOf(handler) === 'function') { result = handler.call(object, evt, view); // Do not preventDefault in eventManagers. evt.stopPropagation(); } else { result = this._bubbleEvent(view, evt, eventName); } return result; }, _bubbleEvent: function(view, evt, eventName) { return Ember.run(function() { return view.handleEvent(eventName, evt); }); }, destroy: function() { var rootElement = get(this, 'rootElement'); Ember.$(rootElement).undelegate('.ember').removeClass('ember-application'); return this._super(); } }); })(); (function() { /** @module ember @submodule ember-views */ // Add a new named queue for rendering views that happens // after bindings have synced, and a queue for scheduling actions // that that should occur after view rendering. var queues = Ember.run.queues; queues.splice(Ember.$.inArray('actions', queues)+1, 0, 'render', 'afterRender'); })(); (function() { /** @module ember @submodule ember-views */ var get = Ember.get, set = Ember.set; // Original class declaration and documentation in runtime/lib/controllers/controller.js // NOTE: It may be possible with YUIDoc to combine docs in two locations /** Additional methods for the ControllerMixin @class ControllerMixin @namespace Ember */ Ember.ControllerMixin.reopen({ target: null, namespace: null, view: null, container: null, _childContainers: null, init: function() { this._super(); set(this, '_childContainers', {}); }, _modelDidChange: Ember.observer(function() { var containers = get(this, '_childContainers'), container; for (var prop in containers) { if (!containers.hasOwnProperty(prop)) { continue; } containers[prop].destroy(); } set(this, '_childContainers', {}); }, 'model') }); })(); (function() { })(); (function() { var states = {}; /** @module ember @submodule ember-views */ var get = Ember.get, set = Ember.set, addObserver = Ember.addObserver, removeObserver = Ember.removeObserver; var meta = Ember.meta, guidFor = Ember.guidFor, fmt = Ember.String.fmt; var a_slice = [].slice; var a_forEach = Ember.EnumerableUtils.forEach; var a_addObject = Ember.EnumerableUtils.addObject; var childViewsProperty = Ember.computed(function() { var childViews = this._childViews, ret = Ember.A(), view = this; a_forEach(childViews, function(view) { if (view.isVirtual) { ret.pushObjects(get(view, 'childViews')); } else { ret.push(view); } }); ret.replace = function (idx, removedCount, addedViews) { if (view instanceof Ember.ContainerView) { return view.replace(idx, removedCount, addedViews); } throw new Error("childViews is immutable"); }; return ret; }); /** Global hash of shared templates. This will automatically be populated by the build tools so that you can store your Handlebars templates in separate files that get loaded into JavaScript at buildtime. @property TEMPLATES @for Ember @type Hash */ Ember.TEMPLATES = {}; Ember.CoreView = Ember.Object.extend(Ember.Evented, { isView: true, states: states, init: function() { this._super(); // Register the view for event handling. This hash is used by // Ember.EventDispatcher to dispatch incoming events. if (!this.isVirtual) { Ember.View.views[this.elementId] = this; } this.addBeforeObserver('elementId', function() { throw new Error("Changing a view's elementId after creation is not allowed"); }); this.transitionTo('preRender'); }, /** If the view is currently inserted into the DOM of a parent view, this property will point to the parent of the view. @property parentView @type Ember.View @default null */ parentView: Ember.computed(function() { var parent = this._parentView; if (parent && parent.isVirtual) { return get(parent, 'parentView'); } else { return parent; } }).property('_parentView'), state: null, _parentView: null, // return the current view, not including virtual views concreteView: Ember.computed(function() { if (!this.isVirtual) { return this; } else { return get(this, 'parentView'); } }).property('parentView').volatile(), instrumentName: 'core_view', instrumentDetails: function(hash) { hash.object = this.toString(); }, /** @private Invoked by the view system when this view needs to produce an HTML representation. This method will create a new render buffer, if needed, then apply any default attributes, such as class names and visibility. Finally, the `render()` method is invoked, which is responsible for doing the bulk of the rendering. You should not need to override this method; instead, implement the `template` property, or if you need more control, override the `render` method. @method renderToBuffer @param {Ember.RenderBuffer} buffer the render buffer. If no buffer is passed, a default buffer, using the current view's `tagName`, will be used. */ renderToBuffer: function(parentBuffer, bufferOperation) { var name = 'render.' + this.instrumentName, details = {}; this.instrumentDetails(details); return Ember.instrument(name, details, function() { return this._renderToBuffer(parentBuffer, bufferOperation); }, this); }, _renderToBuffer: function(parentBuffer, bufferOperation) { Ember.run.sync(); // If this is the top-most view, start a new buffer. Otherwise, // create a new buffer relative to the original using the // provided buffer operation (for example, `insertAfter` will // insert a new buffer after the "parent buffer"). var tagName = this.tagName; if (tagName === null || tagName === undefined) { tagName = 'div'; } var buffer = this.buffer = parentBuffer && parentBuffer.begin(tagName) || Ember.RenderBuffer(tagName); this.transitionTo('inBuffer', false); this.beforeRender(buffer); this.render(buffer); this.afterRender(buffer); return buffer; }, /** @private Override the default event firing from `Ember.Evented` to also call methods with the given name. @method trigger @param name {String} */ trigger: function(name) { this._super.apply(this, arguments); var method = this[name]; if (method) { var args = [], i, l; for (i = 1, l = arguments.length; i < l; i++) { args.push(arguments[i]); } return method.apply(this, args); } }, has: function(name) { return Ember.typeOf(this[name]) === 'function' || this._super(name); }, willDestroy: function() { var parent = this._parentView; // destroy the element -- this will avoid each child view destroying // the element over and over again... if (!this.removedFromDOM) { this.destroyElement(); } // remove from parent if found. Don't call removeFromParent, // as removeFromParent will try to remove the element from // the DOM again. if (parent) { parent.removeChild(this); } this.transitionTo('destroyed'); // next remove view from global hash if (!this.isVirtual) delete Ember.View.views[this.elementId]; }, clearRenderedChildren: Ember.K, triggerRecursively: Ember.K, invokeRecursively: Ember.K, transitionTo: Ember.K, destroyElement: Ember.K }); /** `Ember.View` is the class in Ember responsible for encapsulating templates of HTML content, combining templates with data to render as sections of a page's DOM, and registering and responding to user-initiated events. ## HTML Tag The default HTML tag name used for a view's DOM representation is `div`. This can be customized by setting the `tagName` property. The following view class: ```javascript ParagraphView = Ember.View.extend({ tagName: 'em' }); ``` Would result in instances with the following HTML: ```html ``` ## HTML `class` Attribute The HTML `class` attribute of a view's tag can be set by providing a `classNames` property that is set to an array of strings: ```javascript MyView = Ember.View.extend({ classNames: ['my-class', 'my-other-class'] }); ``` Will result in view instances with an HTML representation of: ```html
    ``` `class` attribute values can also be set by providing a `classNameBindings` property set to an array of properties names for the view. The return value of these properties will be added as part of the value for the view's `class` attribute. These properties can be computed properties: ```javascript MyView = Ember.View.extend({ classNameBindings: ['propertyA', 'propertyB'], propertyA: 'from-a', propertyB: function(){ if(someLogic){ return 'from-b'; } }.property() }); ``` Will result in view instances with an HTML representation of: ```html
    ``` If the value of a class name binding returns a boolean the property name itself will be used as the class name if the property is true. The class name will not be added if the value is `false` or `undefined`. ```javascript MyView = Ember.View.extend({ classNameBindings: ['hovered'], hovered: true }); ``` Will result in view instances with an HTML representation of: ```html
    ``` When using boolean class name bindings you can supply a string value other than the property name for use as the `class` HTML attribute by appending the preferred value after a ":" character when defining the binding: ```javascript MyView = Ember.View.extend({ classNameBindings: ['awesome:so-very-cool'], awesome: true }); ``` Will result in view instances with an HTML representation of: ```html
    ``` Boolean value class name bindings whose property names are in a camelCase-style format will be converted to a dasherized format: ```javascript MyView = Ember.View.extend({ classNameBindings: ['isUrgent'], isUrgent: true }); ``` Will result in view instances with an HTML representation of: ```html
    ``` Class name bindings can also refer to object values that are found by traversing a path relative to the view itself: ```javascript MyView = Ember.View.extend({ classNameBindings: ['messages.empty'] messages: Ember.Object.create({ empty: true }) }); ``` Will result in view instances with an HTML representation of: ```html
    ``` If you want to add a class name for a property which evaluates to true and and a different class name if it evaluates to false, you can pass a binding like this: ```javascript // Applies 'enabled' class when isEnabled is true and 'disabled' when isEnabled is false Ember.View.create({ classNameBindings: ['isEnabled:enabled:disabled'] isEnabled: true }); ``` Will result in view instances with an HTML representation of: ```html
    ``` When isEnabled is `false`, the resulting HTML reprensentation looks like this: ```html
    ``` This syntax offers the convenience to add a class if a property is `false`: ```javascript // Applies no class when isEnabled is true and class 'disabled' when isEnabled is false Ember.View.create({ classNameBindings: ['isEnabled::disabled'] isEnabled: true }); ``` Will result in view instances with an HTML representation of: ```html
    ``` When the `isEnabled` property on the view is set to `false`, it will result in view instances with an HTML representation of: ```html
    ``` Updates to the the value of a class name binding will result in automatic update of the HTML `class` attribute in the view's rendered HTML representation. If the value becomes `false` or `undefined` the class name will be removed. Both `classNames` and `classNameBindings` are concatenated properties. See `Ember.Object` documentation for more information about concatenated properties. ## HTML Attributes The HTML attribute section of a view's tag can be set by providing an `attributeBindings` property set to an array of property names on the view. The return value of these properties will be used as the value of the view's HTML associated attribute: ```javascript AnchorView = Ember.View.extend({ tagName: 'a', attributeBindings: ['href'], href: 'http://google.com' }); ``` Will result in view instances with an HTML representation of: ```html ``` If the return value of an `attributeBindings` monitored property is a boolean the property will follow HTML's pattern of repeating the attribute's name as its value: ```javascript MyTextInput = Ember.View.extend({ tagName: 'input', attributeBindings: ['disabled'], disabled: true }); ``` Will result in view instances with an HTML representation of: ```html ``` `attributeBindings` can refer to computed properties: ```javascript MyTextInput = Ember.View.extend({ tagName: 'input', attributeBindings: ['disabled'], disabled: function(){ if (someLogic) { return true; } else { return false; } }.property() }); ``` Updates to the the property of an attribute binding will result in automatic update of the HTML attribute in the view's rendered HTML representation. `attributeBindings` is a concatenated property. See `Ember.Object` documentation for more information about concatenated properties. ## Templates The HTML contents of a view's rendered representation are determined by its template. Templates can be any function that accepts an optional context parameter and returns a string of HTML that will be inserted within the view's tag. Most typically in Ember this function will be a compiled `Ember.Handlebars` template. ```javascript AView = Ember.View.extend({ template: Ember.Handlebars.compile('I am the template') }); ``` Will result in view instances with an HTML representation of: ```html
    I am the template
    ``` Within an Ember application is more common to define a Handlebars templates as part of a page: ```html ``` And associate it by name using a view's `templateName` property: ```javascript AView = Ember.View.extend({ templateName: 'some-template' }); ``` Using a value for `templateName` that does not have a Handlebars template with a matching `data-template-name` attribute will throw an error. Assigning a value to both `template` and `templateName` properties will throw an error. For views classes that may have a template later defined (e.g. as the block portion of a `{{view}}` Handlebars helper call in another template or in a subclass), you can provide a `defaultTemplate` property set to compiled template function. If a template is not later provided for the view instance the `defaultTemplate` value will be used: ```javascript AView = Ember.View.extend({ defaultTemplate: Ember.Handlebars.compile('I was the default'), template: null, templateName: null }); ``` Will result in instances with an HTML representation of: ```html
    I was the default
    ``` If a `template` or `templateName` is provided it will take precedence over `defaultTemplate`: ```javascript AView = Ember.View.extend({ defaultTemplate: Ember.Handlebars.compile('I was the default') }); aView = AView.create({ template: Ember.Handlebars.compile('I was the template, not default') }); ``` Will result in the following HTML representation when rendered: ```html
    I was the template, not default
    ``` ## View Context The default context of the compiled template is the view's controller: ```javascript AView = Ember.View.extend({ template: Ember.Handlebars.compile('Hello {{excitedGreeting}}') }); aController = Ember.Object.create({ firstName: 'Barry', excitedGreeting: function(){ return this.get("content.firstName") + "!!!" }.property() }); aView = AView.create({ controller: aController, }); ``` Will result in an HTML representation of: ```html
    Hello Barry!!!
    ``` A context can also be explicitly supplied through the view's `context` property. If the view has neither `context` nor `controller` properties, the `parentView`'s context will be used. ## Layouts Views can have a secondary template that wraps their main template. Like primary templates, layouts can be any function that accepts an optional context parameter and returns a string of HTML that will be inserted inside view's tag. Views whose HTML element is self closing (e.g. ``) cannot have a layout and this property will be ignored. Most typically in Ember a layout will be a compiled `Ember.Handlebars` template. A view's layout can be set directly with the `layout` property or reference an existing Handlebars template by name with the `layoutName` property. A template used as a layout must contain a single use of the Handlebars `{{yield}}` helper. The HTML contents of a view's rendered `template` will be inserted at this location: ```javascript AViewWithLayout = Ember.View.extend({ layout: Ember.Handlebars.compile("
    {{yield}}
    ") template: Ember.Handlebars.compile("I got wrapped"), }); ``` Will result in view instances with an HTML representation of: ```html
    I got wrapped
    ``` See `Handlebars.helpers.yield` for more information. ## Responding to Browser Events Views can respond to user-initiated events in one of three ways: method implementation, through an event manager, and through `{{action}}` helper use in their template or layout. ### Method Implementation Views can respond to user-initiated events by implementing a method that matches the event name. A `jQuery.Event` object will be passed as the argument to this method. ```javascript AView = Ember.View.extend({ click: function(event){ // will be called when when an instance's // rendered element is clicked } }); ``` ### Event Managers Views can define an object as their `eventManager` property. This object can then implement methods that match the desired event names. Matching events that occur on the view's rendered HTML or the rendered HTML of any of its DOM descendants will trigger this method. A `jQuery.Event` object will be passed as the first argument to the method and an `Ember.View` object as the second. The `Ember.View` will be the view whose rendered HTML was interacted with. This may be the view with the `eventManager` property or one of its descendent views. ```javascript AView = Ember.View.extend({ eventManager: Ember.Object.create({ doubleClick: function(event, view){ // will be called when when an instance's // rendered element or any rendering // of this views's descendent // elements is clicked } }) }); ``` An event defined for an event manager takes precedence over events of the same name handled through methods on the view. ```javascript AView = Ember.View.extend({ mouseEnter: function(event){ // will never trigger. }, eventManager: Ember.Object.create({ mouseEnter: function(event, view){ // takes presedence over AView#mouseEnter } }) }); ``` Similarly a view's event manager will take precedence for events of any views rendered as a descendent. A method name that matches an event name will not be called if the view instance was rendered inside the HTML representation of a view that has an `eventManager` property defined that handles events of the name. Events not handled by the event manager will still trigger method calls on the descendent. ```javascript OuterView = Ember.View.extend({ template: Ember.Handlebars.compile("outer {{#view InnerView}}inner{{/view}} outer"), eventManager: Ember.Object.create({ mouseEnter: function(event, view){ // view might be instance of either // OutsideView or InnerView depending on // where on the page the user interaction occured } }) }); InnerView = Ember.View.extend({ click: function(event){ // will be called if rendered inside // an OuterView because OuterView's // eventManager doesn't handle click events }, mouseEnter: function(event){ // will never be called if rendered inside // an OuterView. } }); ``` ### Handlebars `{{action}}` Helper See `Handlebars.helpers.action`. ### Event Names Possible events names for any of the responding approaches described above are: Touch events: * `touchStart` * `touchMove` * `touchEnd` * `touchCancel` Keyboard events * `keyDown` * `keyUp` * `keyPress` Mouse events * `mouseDown` * `mouseUp` * `contextMenu` * `click` * `doubleClick` * `mouseMove` * `focusIn` * `focusOut` * `mouseEnter` * `mouseLeave` Form events: * `submit` * `change` * `focusIn` * `focusOut` * `input` HTML5 drag and drop events: * `dragStart` * `drag` * `dragEnter` * `dragLeave` * `drop` * `dragEnd` ## Handlebars `{{view}}` Helper Other `Ember.View` instances can be included as part of a view's template by using the `{{view}}` Handlebars helper. See `Handlebars.helpers.view` for additional information. @class View @namespace Ember @extends Ember.Object @uses Ember.Evented */ Ember.View = Ember.CoreView.extend( /** @scope Ember.View.prototype */ { concatenatedProperties: ['classNames', 'classNameBindings', 'attributeBindings'], /** @property isView @type Boolean @default true @final */ isView: true, // .......................................................... // TEMPLATE SUPPORT // /** The name of the template to lookup if no template is provided. `Ember.View` will look for a template with this name in this view's `templates` object. By default, this will be a global object shared in `Ember.TEMPLATES`. @property templateName @type String @default null */ templateName: null, /** The name of the layout to lookup if no layout is provided. `Ember.View` will look for a template with this name in this view's `templates` object. By default, this will be a global object shared in `Ember.TEMPLATES`. @property layoutName @type String @default null */ layoutName: null, /** The hash in which to look for `templateName`. @property templates @type Ember.Object @default Ember.TEMPLATES */ templates: Ember.TEMPLATES, /** The template used to render the view. This should be a function that accepts an optional context parameter and returns a string of HTML that will be inserted into the DOM relative to its parent view. In general, you should set the `templateName` property instead of setting the template yourself. @property template @type Function */ template: Ember.computed(function(key, value) { if (value !== undefined) { return value; } var templateName = get(this, 'templateName'), template = this.templateForName(templateName, 'template'); return template || get(this, 'defaultTemplate'); }).property('templateName'), container: Ember.computed(function() { var parentView = get(this, '_parentView'); if (parentView) { return get(parentView, 'container'); } return Ember.Container && Ember.Container.defaultContainer; }), /** The controller managing this view. If this property is set, it will be made available for use by the template. @property controller @type Object */ controller: Ember.computed(function(key) { var parentView = get(this, '_parentView'); return parentView ? get(parentView, 'controller') : null; }).property('_parentView'), /** A view may contain a layout. A layout is a regular template but supersedes the `template` property during rendering. It is the responsibility of the layout template to retrieve the `template` property from the view (or alternatively, call `Handlebars.helpers.yield`, `{{yield}}`) to render it in the correct location. This is useful for a view that has a shared wrapper, but which delegates the rendering of the contents of the wrapper to the `template` property on a subclass. @property layout @type Function */ layout: Ember.computed(function(key) { var layoutName = get(this, 'layoutName'), layout = this.templateForName(layoutName, 'layout'); return layout || get(this, 'defaultLayout'); }).property('layoutName'), templateForName: function(name, type) { if (!name) { return; } var container = get(this, 'container'); if (container) { return container.lookup('template:' + name); } }, /** The object from which templates should access properties. This object will be passed to the template function each time the render method is called, but it is up to the individual function to decide what to do with it. By default, this will be the view's controller. @property context @type Object */ context: Ember.computed(function(key, value) { if (arguments.length === 2) { set(this, '_context', value); return value; } else { return get(this, '_context'); } }).volatile(), /** @private Private copy of the view's template context. This can be set directly by Handlebars without triggering the observer that causes the view to be re-rendered. The context of a view is looked up as follows: 1. Supplied context (usually by Handlebars) 2. Specified controller 3. `parentView`'s context (for a child of a ContainerView) The code in Handlebars that overrides the `_context` property first checks to see whether the view has a specified controller. This is something of a hack and should be revisited. @property _context */ _context: Ember.computed(function(key) { var parentView, controller; if (controller = get(this, 'controller')) { return controller; } parentView = this._parentView; if (parentView) { return get(parentView, '_context'); } return null; }), /** @private If a value that affects template rendering changes, the view should be re-rendered to reflect the new value. @method _displayPropertyDidChange */ _contextDidChange: Ember.observer(function() { this.rerender(); }, 'context'), /** If `false`, the view will appear hidden in DOM. @property isVisible @type Boolean @default null */ isVisible: true, /** @private Array of child views. You should never edit this array directly. Instead, use `appendChild` and `removeFromParent`. @property childViews @type Array @default [] */ childViews: childViewsProperty, _childViews: [], // When it's a virtual view, we need to notify the parent that their // childViews will change. _childViewsWillChange: Ember.beforeObserver(function() { if (this.isVirtual) { var parentView = get(this, 'parentView'); if (parentView) { Ember.propertyWillChange(parentView, 'childViews'); } } }, 'childViews'), // When it's a virtual view, we need to notify the parent that their // childViews did change. _childViewsDidChange: Ember.observer(function() { if (this.isVirtual) { var parentView = get(this, 'parentView'); if (parentView) { Ember.propertyDidChange(parentView, 'childViews'); } } }, 'childViews'), /** Return the nearest ancestor that is an instance of the provided class. @property nearestInstanceOf @param {Class} klass Subclass of Ember.View (or Ember.View itself) @return Ember.View @deprecated */ nearestInstanceOf: function(klass) { var view = get(this, 'parentView'); while (view) { if(view instanceof klass) { return view; } view = get(view, 'parentView'); } }, /** Return the nearest ancestor that is an instance of the provided class or mixin. @property nearestOfType @param {Class,Mixin} klass Subclass of Ember.View (or Ember.View itself), or an instance of Ember.Mixin. @return Ember.View */ nearestOfType: function(klass) { var view = get(this, 'parentView'), isOfType = klass instanceof Ember.Mixin ? function(view) { return klass.detect(view); } : function(view) { return klass.detect(view.constructor); }; while (view) { if( isOfType(view) ) { return view; } view = get(view, 'parentView'); } }, /** Return the nearest ancestor that has a given property. @property nearestWithProperty @param {String} property A property name @return Ember.View */ nearestWithProperty: function(property) { var view = get(this, 'parentView'); while (view) { if (property in view) { return view; } view = get(view, 'parentView'); } }, /** Return the nearest ancestor whose parent is an instance of `klass`. @property nearestChildOf @param {Class} klass Subclass of Ember.View (or Ember.View itself) @return Ember.View */ nearestChildOf: function(klass) { var view = get(this, 'parentView'); while (view) { if(get(view, 'parentView') instanceof klass) { return view; } view = get(view, 'parentView'); } }, /** @private When the parent view changes, recursively invalidate `controller` @method _parentViewDidChange */ _parentViewDidChange: Ember.observer(function() { if (this.isDestroying) { return; } if (get(this, 'parentView.controller') && !get(this, 'controller')) { this.notifyPropertyChange('controller'); } }, '_parentView'), _controllerDidChange: Ember.observer(function() { if (this.isDestroying) { return; } this.rerender(); this.forEachChildView(function(view) { view.propertyDidChange('controller'); }); }, 'controller'), cloneKeywords: function() { var templateData = get(this, 'templateData'); var keywords = templateData ? Ember.copy(templateData.keywords) : {}; set(keywords, 'view', get(this, 'concreteView')); set(keywords, '_view', this); set(keywords, 'controller', get(this, 'controller')); return keywords; }, /** Called on your view when it should push strings of HTML into a `Ember.RenderBuffer`. Most users will want to override the `template` or `templateName` properties instead of this method. By default, `Ember.View` will look for a function in the `template` property and invoke it with the value of `context`. The value of `context` will be the view's controller unless you override it. @method render @param {Ember.RenderBuffer} buffer The render buffer */ render: function(buffer) { // If this view has a layout, it is the responsibility of the // the layout to render the view's template. Otherwise, render the template // directly. var template = get(this, 'layout') || get(this, 'template'); if (template) { var context = get(this, 'context'); var keywords = this.cloneKeywords(); var output; var data = { view: this, buffer: buffer, isRenderData: true, keywords: keywords, insideGroup: get(this, 'templateData.insideGroup') }; // Invoke the template with the provided template context, which // is the view's controller by default. A hash of data is also passed that provides // the template with access to the view and render buffer. // The template should write directly to the render buffer instead // of returning a string. output = template(context, { data: data }); // If the template returned a string instead of writing to the buffer, // push the string onto the buffer. if (output !== undefined) { buffer.push(output); } } }, /** Renders the view again. This will work regardless of whether the view is already in the DOM or not. If the view is in the DOM, the rendering process will be deferred to give bindings a chance to synchronize. If children were added during the rendering process using `appendChild`, `rerender` will remove them, because they will be added again if needed by the next `render`. In general, if the display of your view changes, you should modify the DOM element directly instead of manually calling `rerender`, which can be slow. @method rerender */ rerender: function() { return this.currentState.rerender(this); }, clearRenderedChildren: function() { var lengthBefore = this.lengthBeforeRender, lengthAfter = this.lengthAfterRender; // If there were child views created during the last call to render(), // remove them under the assumption that they will be re-created when // we re-render. // VIEW-TODO: Unit test this path. var childViews = this._childViews; for (var i=lengthAfter-1; i>=lengthBefore; i--) { if (childViews[i]) { childViews[i].destroy(); } } }, /** @private Iterates over the view's `classNameBindings` array, inserts the value of the specified property into the `classNames` array, then creates an observer to update the view's element if the bound property ever changes in the future. @method _applyClassNameBindings */ _applyClassNameBindings: function(classBindings) { var classNames = this.classNames, elem, newClass, dasherizedClass; // Loop through all of the configured bindings. These will be either // property names ('isUrgent') or property paths relative to the view // ('content.isUrgent') a_forEach(classBindings, function(binding) { // Variable in which the old class value is saved. The observer function // closes over this variable, so it knows which string to remove when // the property changes. var oldClass; // Extract just the property name from bindings like 'foo:bar' var parsedPath = Ember.View._parsePropertyPath(binding); // Set up an observer on the context. If the property changes, toggle the // class name. var observer = function() { // Get the current value of the property newClass = this._classStringForProperty(binding); elem = this.$(); // If we had previously added a class to the element, remove it. if (oldClass) { elem.removeClass(oldClass); // Also remove from classNames so that if the view gets rerendered, // the class doesn't get added back to the DOM. classNames.removeObject(oldClass); } // If necessary, add a new class. Make sure we keep track of it so // it can be removed in the future. if (newClass) { elem.addClass(newClass); oldClass = newClass; } else { oldClass = null; } }; // Get the class name for the property at its current value dasherizedClass = this._classStringForProperty(binding); if (dasherizedClass) { // Ensure that it gets into the classNames array // so it is displayed when we render. a_addObject(classNames, dasherizedClass); // Save a reference to the class name so we can remove it // if the observer fires. Remember that this variable has // been closed over by the observer. oldClass = dasherizedClass; } this.registerObserver(this, parsedPath.path, observer); // Remove className so when the view is rerendered, // the className is added based on binding reevaluation this.one('willClearRender', function() { if (oldClass) { classNames.removeObject(oldClass); oldClass = null; } }); }, this); }, /** @private Iterates through the view's attribute bindings, sets up observers for each, then applies the current value of the attributes to the passed render buffer. @method _applyAttributeBindings @param {Ember.RenderBuffer} buffer */ _applyAttributeBindings: function(buffer, attributeBindings) { var attributeValue, elem, type; a_forEach(attributeBindings, function(binding) { var split = binding.split(':'), property = split[0], attributeName = split[1] || property; // Create an observer to add/remove/change the attribute if the // JavaScript property changes. var observer = function() { elem = this.$(); if (!elem) { return; } attributeValue = get(this, property); Ember.View.applyAttributeBindings(elem, attributeName, attributeValue); }; this.registerObserver(this, property, observer); // Determine the current value and add it to the render buffer // if necessary. attributeValue = get(this, property); Ember.View.applyAttributeBindings(buffer, attributeName, attributeValue); }, this); }, /** @private Given a property name, returns a dasherized version of that property name if the property evaluates to a non-falsy value. For example, if the view has property `isUrgent` that evaluates to true, passing `isUrgent` to this method will return `"is-urgent"`. @method _classStringForProperty @param property */ _classStringForProperty: function(property) { var parsedPath = Ember.View._parsePropertyPath(property); var path = parsedPath.path; var val = get(this, path); if (val === undefined && Ember.isGlobalPath(path)) { val = get(Ember.lookup, path); } return Ember.View._classStringForValue(path, val, parsedPath.className, parsedPath.falsyClassName); }, // .......................................................... // ELEMENT SUPPORT // /** Returns the current DOM element for the view. @property element @type DOMElement */ element: Ember.computed(function(key, value) { if (value !== undefined) { return this.currentState.setElement(this, value); } else { return this.currentState.getElement(this); } }).property('_parentView'), /** Returns a jQuery object for this view's element. If you pass in a selector string, this method will return a jQuery object, using the current element as its buffer. For example, calling `view.$('li')` will return a jQuery object containing all of the `li` elements inside the DOM element of this view. @property $ @param {String} [selector] a jQuery-compatible selector string @return {jQuery} the CoreQuery object for the DOM node */ $: function(sel) { return this.currentState.$(this, sel); }, mutateChildViews: function(callback) { var childViews = this._childViews, idx = childViews.length, view; while(--idx >= 0) { view = childViews[idx]; callback.call(this, view, idx); } return this; }, forEachChildView: function(callback) { var childViews = this._childViews; if (!childViews) { return this; } var len = childViews.length, view, idx; for(idx = 0; idx < len; idx++) { view = childViews[idx]; callback.call(this, view); } return this; }, /** Appends the view's element to the specified parent element. If the view does not have an HTML representation yet, `createElement()` will be called automatically. Note that this method just schedules the view to be appended; the DOM element will not be appended to the given element until all bindings have finished synchronizing. This is not typically a function that you will need to call directly when building your application. You might consider using `Ember.ContainerView` instead. If you do need to use `appendTo`, be sure that the target element you are providing is associated with an `Ember.Application` and does not have an ancestor element that is associated with an Ember view. @method appendTo @param {String|DOMElement|jQuery} A selector, element, HTML string, or jQuery object @return {Ember.View} receiver */ appendTo: function(target) { // Schedule the DOM element to be created and appended to the given // element after bindings have synchronized. this._insertElementLater(function() { this.$().appendTo(target); }); return this; }, /** Replaces the content of the specified parent element with this view's element. If the view does not have an HTML representation yet, `createElement()` will be called automatically. Note that this method just schedules the view to be appended; the DOM element will not be appended to the given element until all bindings have finished synchronizing @method replaceIn @param {String|DOMElement|jQuery} A selector, element, HTML string, or jQuery object @return {Ember.View} received */ replaceIn: function(target) { this._insertElementLater(function() { Ember.$(target).empty(); this.$().appendTo(target); }); return this; }, /** @private Schedules a DOM operation to occur during the next render phase. This ensures that all bindings have finished synchronizing before the view is rendered. To use, pass a function that performs a DOM operation. Before your function is called, this view and all child views will receive the `willInsertElement` event. After your function is invoked, this view and all of its child views will receive the `didInsertElement` event. ```javascript view._insertElementLater(function() { this.createElement(); this.$().appendTo('body'); }); ``` @method _insertElementLater @param {Function} fn the function that inserts the element into the DOM */ _insertElementLater: function(fn) { this._scheduledInsert = Ember.run.scheduleOnce('render', this, '_insertElement', fn); }, _insertElement: function (fn) { this._scheduledInsert = null; this.currentState.insertElement(this, fn); }, /** Appends the view's element to the document body. If the view does not have an HTML representation yet, `createElement()` will be called automatically. Note that this method just schedules the view to be appended; the DOM element will not be appended to the document body until all bindings have finished synchronizing. @method append @return {Ember.View} receiver */ append: function() { return this.appendTo(document.body); }, /** Removes the view's element from the element to which it is attached. @method remove @return {Ember.View} receiver */ remove: function() { // What we should really do here is wait until the end of the run loop // to determine if the element has been re-appended to a different // element. // In the interim, we will just re-render if that happens. It is more // important than elements get garbage collected. if (!this.removedFromDOM) { this.destroyElement(); } this.invokeRecursively(function(view) { if (view.clearRenderedChildren) { view.clearRenderedChildren(); } }); }, elementId: null, /** Attempts to discover the element in the parent element. The default implementation looks for an element with an ID of `elementId` (or the view's guid if `elementId` is null). You can override this method to provide your own form of lookup. For example, if you want to discover your element using a CSS class name instead of an ID. @method findElementInParentElement @param {DOMElement} parentElement The parent's DOM element @return {DOMElement} The discovered element */ findElementInParentElement: function(parentElem) { var id = "#" + this.elementId; return Ember.$(id)[0] || Ember.$(id, parentElem)[0]; }, /** Creates a DOM representation of the view and all of its child views by recursively calling the `render()` method. After the element has been created, `didInsertElement` will be called on this view and all of its child views. @method createElement @return {Ember.View} receiver */ createElement: function() { if (get(this, 'element')) { return this; } var buffer = this.renderToBuffer(); set(this, 'element', buffer.element()); return this; }, /** Called when a view is going to insert an element into the DOM. @event willInsertElement */ willInsertElement: Ember.K, /** Called when the element of the view has been inserted into the DOM. Override this function to do any set up that requires an element in the document body. @event didInsertElement */ didInsertElement: Ember.K, /** Called when the view is about to rerender, but before anything has been torn down. This is a good opportunity to tear down any manual observers you have installed based on the DOM state @event willClearRender */ willClearRender: Ember.K, /** @private Run this callback on the current view and recursively on child views. @method invokeRecursively @param fn {Function} */ invokeRecursively: function(fn) { var childViews = [this], currentViews, view; while (childViews.length) { currentViews = childViews.slice(); childViews = []; for (var i=0, l=currentViews.length; i` tag for views. @property tagName @type String @default null */ // We leave this null by default so we can tell the difference between // the default case and a user-specified tag. tagName: null, /** The WAI-ARIA role of the control represented by this view. For example, a button may have a role of type 'button', or a pane may have a role of type 'alertdialog'. This property is used by assistive software to help visually challenged users navigate rich web applications. The full list of valid WAI-ARIA roles is available at: http://www.w3.org/TR/wai-aria/roles#roles_categorization @property ariaRole @type String @default null */ ariaRole: null, /** Standard CSS class names to apply to the view's outer element. This property automatically inherits any class names defined by the view's superclasses as well. @property classNames @type Array @default ['ember-view'] */ classNames: ['ember-view'], /** A list of properties of the view to apply as class names. If the property is a string value, the value of that string will be applied as a class name. ```javascript // Applies the 'high' class to the view element Ember.View.create({ classNameBindings: ['priority'] priority: 'high' }); ``` If the value of the property is a Boolean, the name of that property is added as a dasherized class name. ```javascript // Applies the 'is-urgent' class to the view element Ember.View.create({ classNameBindings: ['isUrgent'] isUrgent: true }); ``` If you would prefer to use a custom value instead of the dasherized property name, you can pass a binding like this: ```javascript // Applies the 'urgent' class to the view element Ember.View.create({ classNameBindings: ['isUrgent:urgent'] isUrgent: true }); ``` This list of properties is inherited from the view's superclasses as well. @property classNameBindings @type Array @default [] */ classNameBindings: [], /** A list of properties of the view to apply as attributes. If the property is a string value, the value of that string will be applied as the attribute. ```javascript // Applies the type attribute to the element // with the value "button", like
    Ember.View.create({ attributeBindings: ['type'], type: 'button' }); ``` If the value of the property is a Boolean, the name of that property is added as an attribute. ```javascript // Renders something like
    Ember.View.create({ attributeBindings: ['enabled'], enabled: true }); ``` @property attributeBindings */ attributeBindings: [], // ....................................................... // CORE DISPLAY METHODS // /** @private Setup a view, but do not finish waking it up. - configure `childViews` - register the view with the global views hash, which is used for event dispatch @method init */ init: function() { this.elementId = this.elementId || guidFor(this); this._super(); // setup child views. be sure to clone the child views array first this._childViews = this._childViews.slice(); this.classNameBindings = Ember.A(this.classNameBindings.slice()); this.classNames = Ember.A(this.classNames.slice()); var viewController = get(this, 'viewController'); if (viewController) { viewController = get(viewController); if (viewController) { set(viewController, 'view', this); } } }, appendChild: function(view, options) { return this.currentState.appendChild(this, view, options); }, /** Removes the child view from the parent view. @method removeChild @param {Ember.View} view @return {Ember.View} receiver */ removeChild: function(view) { // If we're destroying, the entire subtree will be // freed, and the DOM will be handled separately, // so no need to mess with childViews. if (this.isDestroying) { return; } // update parent node set(view, '_parentView', null); // remove view from childViews array. var childViews = this._childViews; Ember.EnumerableUtils.removeObject(childViews, view); this.propertyDidChange('childViews'); // HUH?! what happened to will change? return this; }, /** Removes all children from the `parentView`. @method removeAllChildren @return {Ember.View} receiver */ removeAllChildren: function() { return this.mutateChildViews(function(view) { this.removeChild(view); }); }, destroyAllChildren: function() { return this.mutateChildViews(function(view) { view.destroy(); }); }, /** Removes the view from its `parentView`, if one is found. Otherwise does nothing. @method removeFromParent @return {Ember.View} receiver */ removeFromParent: function() { var parent = this._parentView; // Remove DOM element from parent this.remove(); if (parent) { parent.removeChild(this); } return this; }, /** You must call `destroy` on a view to destroy the view (and all of its child views). This will remove the view from any parent node, then make sure that the DOM element managed by the view can be released by the memory manager. @method willDestroy */ willDestroy: function() { // calling this._super() will nuke computed properties and observers, // so collect any information we need before calling super. var childViews = this._childViews, parent = this._parentView, childLen, i; // destroy the element -- this will avoid each child view destroying // the element over and over again... if (!this.removedFromDOM) { this.destroyElement(); } childLen = childViews.length; for (i=childLen-1; i>=0; i--) { childViews[i].removedFromDOM = true; } // remove from non-virtual parent view if viewName was specified if (this.viewName) { var nonVirtualParentView = get(this, 'parentView'); if (nonVirtualParentView) { set(nonVirtualParentView, this.viewName, null); } } // remove from parent if found. Don't call removeFromParent, // as removeFromParent will try to remove the element from // the DOM again. if (parent) { parent.removeChild(this); } this.transitionTo('destroyed'); childLen = childViews.length; for (i=childLen-1; i>=0; i--) { childViews[i].destroy(); } // next remove view from global hash if (!this.isVirtual) delete Ember.View.views[get(this, 'elementId')]; }, /** Instantiates a view to be added to the childViews array during view initialization. You generally will not call this method directly unless you are overriding `createChildViews()`. Note that this method will automatically configure the correct settings on the new view instance to act as a child of the parent. @method createChildView @param {Class} viewClass @param {Hash} [attrs] Attributes to add @return {Ember.View} new instance */ createChildView: function(view, attrs) { if (view.isView && view._parentView === this) { return view; } if (Ember.CoreView.detect(view)) { attrs = attrs || {}; attrs._parentView = this; attrs.templateData = attrs.templateData || get(this, 'templateData'); view = view.create(attrs); // don't set the property on a virtual view, as they are invisible to // consumers of the view API if (view.viewName) { set(get(this, 'concreteView'), view.viewName, view); } } else { if (attrs) { view.setProperties(attrs); } if (!get(view, 'templateData')) { set(view, 'templateData', get(this, 'templateData')); } set(view, '_parentView', this); } return view; }, becameVisible: Ember.K, becameHidden: Ember.K, /** @private When the view's `isVisible` property changes, toggle the visibility element of the actual DOM element. @method _isVisibleDidChange */ _isVisibleDidChange: Ember.observer(function() { var $el = this.$(); if (!$el) { return; } var isVisible = get(this, 'isVisible'); $el.toggle(isVisible); if (this._isAncestorHidden()) { return; } if (isVisible) { this._notifyBecameVisible(); } else { this._notifyBecameHidden(); } }, 'isVisible'), _notifyBecameVisible: function() { this.trigger('becameVisible'); this.forEachChildView(function(view) { var isVisible = get(view, 'isVisible'); if (isVisible || isVisible === null) { view._notifyBecameVisible(); } }); }, _notifyBecameHidden: function() { this.trigger('becameHidden'); this.forEachChildView(function(view) { var isVisible = get(view, 'isVisible'); if (isVisible || isVisible === null) { view._notifyBecameHidden(); } }); }, _isAncestorHidden: function() { var parent = get(this, 'parentView'); while (parent) { if (get(parent, 'isVisible') === false) { return true; } parent = get(parent, 'parentView'); } return false; }, clearBuffer: function() { this.invokeRecursively(function(view) { view.buffer = null; }); }, transitionTo: function(state, children) { this.currentState = this.states[state]; this.state = state; if (children !== false) { this.forEachChildView(function(view) { view.transitionTo(state); }); } }, // ....................................................... // EVENT HANDLING // /** @private Handle events from `Ember.EventDispatcher` @method handleEvent @param eventName {String} @param evt {Event} */ handleEvent: function(eventName, evt) { return this.currentState.handleEvent(this, eventName, evt); }, registerObserver: function(root, path, target, observer) { Ember.addObserver(root, path, target, observer); this.one('willClearRender', function() { Ember.removeObserver(root, path, target, observer); }); } }); /* Describe how the specified actions should behave in the various states that a view can exist in. Possible states: * preRender: when a view is first instantiated, and after its element was destroyed, it is in the preRender state * inBuffer: once a view has been rendered, but before it has been inserted into the DOM, it is in the inBuffer state * inDOM: once a view has been inserted into the DOM it is in the inDOM state. A view spends the vast majority of its existence in this state. * destroyed: once a view has been destroyed (using the destroy method), it is in this state. No further actions can be invoked on a destroyed view. */ // in the destroyed state, everything is illegal // before rendering has begun, all legal manipulations are noops. // inside the buffer, legal manipulations are done on the buffer // once the view has been inserted into the DOM, legal manipulations // are done on the DOM element. var DOMManager = { prepend: function(view, html) { view.$().prepend(html); }, after: function(view, html) { view.$().after(html); }, html: function(view, html) { view.$().html(html); }, replace: function(view) { var element = get(view, 'element'); set(view, 'element', null); view._insertElementLater(function() { Ember.$(element).replaceWith(get(view, 'element')); }); }, remove: function(view) { view.$().remove(); }, empty: function(view) { view.$().empty(); } }; Ember.View.reopen({ domManager: DOMManager }); Ember.View.reopenClass({ /** @private Parse a path and return an object which holds the parsed properties. For example a path like "content.isEnabled:enabled:disabled" wil return the following object: ```javascript { path: "content.isEnabled", className: "enabled", falsyClassName: "disabled", classNames: ":enabled:disabled" } ``` @method _parsePropertyPath @static */ _parsePropertyPath: function(path) { var split = path.split(':'), propertyPath = split[0], classNames = "", className, falsyClassName; // check if the property is defined as prop:class or prop:trueClass:falseClass if (split.length > 1) { className = split[1]; if (split.length === 3) { falsyClassName = split[2]; } classNames = ':' + className; if (falsyClassName) { classNames += ":" + falsyClassName; } } return { path: propertyPath, classNames: classNames, className: (className === '') ? undefined : className, falsyClassName: falsyClassName }; }, /** @private Get the class name for a given value, based on the path, optional `className` and optional `falsyClassName`. - if a `className` or `falsyClassName` has been specified: - if the value is truthy and `className` has been specified, `className` is returned - if the value is falsy and `falsyClassName` has been specified, `falsyClassName` is returned - otherwise `null` is returned - if the value is `true`, the dasherized last part of the supplied path is returned - if the value is not `false`, `undefined` or `null`, the `value` is returned - if none of the above rules apply, `null` is returned @method _classStringForValue @param path @param val @param className @param falsyClassName @static */ _classStringForValue: function(path, val, className, falsyClassName) { // When using the colon syntax, evaluate the truthiness or falsiness // of the value to determine which className to return if (className || falsyClassName) { if (className && !!val) { return className; } else if (falsyClassName && !val) { return falsyClassName; } else { return null; } // If value is a Boolean and true, return the dasherized property // name. } else if (val === true) { // Normalize property path to be suitable for use // as a class name. For exaple, content.foo.barBaz // becomes bar-baz. var parts = path.split('.'); return Ember.String.dasherize(parts[parts.length-1]); // If the value is not false, undefined, or null, return the current // value of the property. } else if (val !== false && val !== undefined && val !== null) { return val; // Nothing to display. Return null so that the old class is removed // but no new class is added. } else { return null; } } }); /** Global views hash @property views @static @type Hash */ Ember.View.views = {}; // If someone overrides the child views computed property when // defining their class, we want to be able to process the user's // supplied childViews and then restore the original computed property // at view initialization time. This happens in Ember.ContainerView's init // method. Ember.View.childViewsProperty = childViewsProperty; Ember.View.applyAttributeBindings = function(elem, name, value) { if (name === 'value') { Ember.View.applyValueBinding(elem, value); } else { Ember.View.applyAttributeBinding(elem, name, value); } }; Ember.View.applyAttributeBinding = function(elem, name, value) { var type = Ember.typeOf(value); var currentValue = elem.attr(name); // if this changes, also change the logic in ember-handlebars/lib/helpers/binding.js if ( ( ( type === 'string' ) || ( type === 'number' && !isNaN(value) ) || ( type === 'boolean' && value ) ) && ( value !== currentValue ) ) { elem.attr(name, value); } else if (!value) { elem.removeAttr(name); } }; Ember.View.applyValueBinding = function(elem, value) { var type = Ember.typeOf(value); var currentValue = elem.val(); // if this changes, also change the logic in ember-handlebars/lib/helpers/binding.js if ( ( ( type === 'string' ) || ( type === 'number' && !isNaN(value) ) || ( type === 'boolean' && value ) ) && ( value !== currentValue ) ) { if (elem.caretPosition) { var caretPosition = elem.caretPosition(); elem.val(value); elem.setCaretPosition(caretPosition); } else { elem.val(value); } } else if (!value) { elem.val(''); } }; Ember.View.states = states; })(); (function() { /** @module ember @submodule ember-views */ var get = Ember.get, set = Ember.set; Ember.View.states._default = { // appendChild is only legal while rendering the buffer. appendChild: function() { throw "You can't use appendChild outside of the rendering process"; }, $: function() { return undefined; }, getElement: function() { return null; }, // Handle events from `Ember.EventDispatcher` handleEvent: function() { return true; // continue event propagation }, destroyElement: function(view) { set(view, 'element', null); if (view._scheduledInsert) { Ember.run.cancel(view._scheduledInsert); view._scheduledInsert = null; } return view; }, renderToBufferIfNeeded: function () { return false; }, rerender: Ember.K }; })(); (function() { /** @module ember @submodule ember-views */ var preRender = Ember.View.states.preRender = Ember.create(Ember.View.states._default); Ember.merge(preRender, { // a view leaves the preRender state once its element has been // created (createElement). insertElement: function(view, fn) { view.createElement(); view.triggerRecursively('willInsertElement'); // after createElement, the view will be in the hasElement state. fn.call(view); view.transitionTo('inDOM'); view.triggerRecursively('didInsertElement'); }, renderToBufferIfNeeded: function(view) { return view.renderToBuffer(); }, empty: Ember.K, setElement: function(view, value) { if (value !== null) { view.transitionTo('hasElement'); } return value; } }); })(); (function() { /** @module ember @submodule ember-views */ var get = Ember.get, set = Ember.set, meta = Ember.meta; var inBuffer = Ember.View.states.inBuffer = Ember.create(Ember.View.states._default); Ember.merge(inBuffer, { $: function(view, sel) { // if we don't have an element yet, someone calling this.$() is // trying to update an element that isn't in the DOM. Instead, // rerender the view to allow the render method to reflect the // changes. view.rerender(); return Ember.$(); }, // when a view is rendered in a buffer, rerendering it simply // replaces the existing buffer with a new one rerender: function(view) { throw new Ember.Error("Something you did caused a view to re-render after it rendered but before it was inserted into the DOM."); }, // when a view is rendered in a buffer, appending a child // view will render that view and append the resulting // buffer into its buffer. appendChild: function(view, childView, options) { var buffer = view.buffer; childView = view.createChildView(childView, options); view._childViews.push(childView); childView.renderToBuffer(buffer); view.propertyDidChange('childViews'); return childView; }, // when a view is rendered in a buffer, destroying the // element will simply destroy the buffer and put the // state back into the preRender state. destroyElement: function(view) { view.clearBuffer(); view._notifyWillDestroyElement(); view.transitionTo('preRender'); return view; }, empty: function() { }, renderToBufferIfNeeded: function (view) { return view.buffer; }, // It should be impossible for a rendered view to be scheduled for // insertion. insertElement: function() { throw "You can't insert an element that has already been rendered"; }, setElement: function(view, value) { if (value === null) { view.transitionTo('preRender'); } else { view.clearBuffer(); view.transitionTo('hasElement'); } return value; } }); })(); (function() { /** @module ember @submodule ember-views */ var get = Ember.get, set = Ember.set, meta = Ember.meta; var hasElement = Ember.View.states.hasElement = Ember.create(Ember.View.states._default); Ember.merge(hasElement, { $: function(view, sel) { var elem = get(view, 'element'); return sel ? Ember.$(sel, elem) : Ember.$(elem); }, getElement: function(view) { var parent = get(view, 'parentView'); if (parent) { parent = get(parent, 'element'); } if (parent) { return view.findElementInParentElement(parent); } return Ember.$("#" + get(view, 'elementId'))[0]; }, setElement: function(view, value) { if (value === null) { view.transitionTo('preRender'); } else { throw "You cannot set an element to a non-null value when the element is already in the DOM."; } return value; }, // once the view has been inserted into the DOM, rerendering is // deferred to allow bindings to synchronize. rerender: function(view) { view.triggerRecursively('willClearRender'); view.clearRenderedChildren(); view.domManager.replace(view); return view; }, // once the view is already in the DOM, destroying it removes it // from the DOM, nukes its element, and puts it back into the // preRender state if inDOM. destroyElement: function(view) { view._notifyWillDestroyElement(); view.domManager.remove(view); set(view, 'element', null); if (view._scheduledInsert) { Ember.run.cancel(view._scheduledInsert); view._scheduledInsert = null; } return view; }, empty: function(view) { var _childViews = view._childViews, len, idx; if (_childViews) { len = _childViews.length; for (idx = 0; idx < len; idx++) { _childViews[idx]._notifyWillDestroyElement(); } } view.domManager.empty(view); }, // Handle events from `Ember.EventDispatcher` handleEvent: function(view, eventName, evt) { if (view.has(eventName)) { // Handler should be able to re-dispatch events, so we don't // preventDefault or stopPropagation. return view.trigger(eventName, evt); } else { return true; // continue event propagation } } }); var inDOM = Ember.View.states.inDOM = Ember.create(hasElement); Ember.merge(inDOM, { insertElement: function(view, fn) { throw "You can't insert an element into the DOM that has already been inserted"; } }); })(); (function() { /** @module ember @submodule ember-views */ var destroyedError = "You can't call %@ on a destroyed view", fmt = Ember.String.fmt; var destroyed = Ember.View.states.destroyed = Ember.create(Ember.View.states._default); Ember.merge(destroyed, { appendChild: function() { throw fmt(destroyedError, ['appendChild']); }, rerender: function() { throw fmt(destroyedError, ['rerender']); }, destroyElement: function() { throw fmt(destroyedError, ['destroyElement']); }, empty: function() { throw fmt(destroyedError, ['empty']); }, setElement: function() { throw fmt(destroyedError, ["set('element', ...)"]); }, renderToBufferIfNeeded: function() { throw fmt(destroyedError, ["renderToBufferIfNeeded"]); }, // Since element insertion is scheduled, don't do anything if // the view has been destroyed between scheduling and execution insertElement: Ember.K }); })(); (function() { Ember.View.cloneStates = function(from) { var into = {}; into._default = {}; into.preRender = Ember.create(into._default); into.destroyed = Ember.create(into._default); into.inBuffer = Ember.create(into._default); into.hasElement = Ember.create(into._default); into.inDOM = Ember.create(into.hasElement); var viewState; for (var stateName in from) { if (!from.hasOwnProperty(stateName)) { continue; } Ember.merge(into[stateName], from[stateName]); } return into; }; })(); (function() { var states = Ember.View.cloneStates(Ember.View.states); /** @module ember @submodule ember-views */ var get = Ember.get, set = Ember.set, meta = Ember.meta; var forEach = Ember.EnumerableUtils.forEach; /** A `ContainerView` is an `Ember.View` subclass that implements `Ember.MutableArray` allowing programatic management of its child views. ## Setting Initial Child Views The initial array of child views can be set in one of two ways. You can provide a `childViews` property at creation time that contains instance of `Ember.View`: ```javascript aContainer = Ember.ContainerView.create({ childViews: [Ember.View.create(), Ember.View.create()] }); ``` You can also provide a list of property names whose values are instances of `Ember.View`: ```javascript aContainer = Ember.ContainerView.create({ childViews: ['aView', 'bView', 'cView'], aView: Ember.View.create(), bView: Ember.View.create(), cView: Ember.View.create() }); ``` The two strategies can be combined: ```javascript aContainer = Ember.ContainerView.create({ childViews: ['aView', Ember.View.create()], aView: Ember.View.create() }); ``` Each child view's rendering will be inserted into the container's rendered HTML in the same order as its position in the `childViews` property. ## Adding and Removing Child Views The container view implements `Ember.MutableArray` allowing programatic management of its child views. To remove a view, pass that view into a `removeObject` call on the container view. Given an empty `` the following code ```javascript aContainer = Ember.ContainerView.create({ classNames: ['the-container'], childViews: ['aView', 'bView'], aView: Ember.View.create({ template: Ember.Handlebars.compile("A") }), bView: Ember.View.create({ template: Ember.Handlebars.compile("B") }) }); aContainer.appendTo('body'); ``` Results in the HTML ```html
    A
    B
    ``` Removing a view ```javascript aContainer.toArray(); // [aContainer.aView, aContainer.bView] aContainer.removeObject(aContainer.get('bView')); aContainer.toArray(); // [aContainer.aView] ``` Will result in the following HTML ```html
    A
    ``` Similarly, adding a child view is accomplished by adding `Ember.View` instances to the container view. Given an empty `` the following code ```javascript aContainer = Ember.ContainerView.create({ classNames: ['the-container'], childViews: ['aView', 'bView'], aView: Ember.View.create({ template: Ember.Handlebars.compile("A") }), bView: Ember.View.create({ template: Ember.Handlebars.compile("B") }) }); aContainer.appendTo('body'); ``` Results in the HTML ```html
    A
    B
    ``` Adding a view ```javascript AnotherViewClass = Ember.View.extend({ template: Ember.Handlebars.compile("Another view") }); aContainer.toArray(); // [aContainer.aView, aContainer.bView] aContainer.pushObject(AnotherViewClass.create()); aContainer.toArray(); // [aContainer.aView, aContainer.bView, ] ``` Will result in the following HTML ```html
    A
    B
    Another view
    ``` ## Templates and Layout A `template`, `templateName`, `defaultTemplate`, `layout`, `layoutName` or `defaultLayout` property on a container view will not result in the template or layout being rendered. The HTML contents of a `Ember.ContainerView`'s DOM representation will only be the rendered HTML of its child views. ## Binding a View to Display If you would like to display a single view in your ContainerView, you can set its `currentView` property. When the `currentView` property is set to a view instance, it will be added to the ContainerView. If the `currentView` property is later changed to a different view, the new view will replace the old view. If `currentView` is set to `null`, the last `currentView` will be removed. This functionality is useful for cases where you want to bind the display of a ContainerView to a controller or state manager. For example, you can bind the `currentView` of a container to a controller like this: ```javascript App.appController = Ember.Object.create({ view: Ember.View.create({ templateName: 'person_template' }) }); ``` ```handlebars {{view Ember.ContainerView currentViewBinding="App.appController.view"}} ``` @class ContainerView @namespace Ember @extends Ember.View */ Ember.ContainerView = Ember.View.extend(Ember.MutableArray, { states: states, init: function() { this._super(); var childViews = get(this, 'childViews'); // redefine view's childViews property that was obliterated Ember.defineProperty(this, 'childViews', Ember.View.childViewsProperty); var _childViews = this._childViews; forEach(childViews, function(viewName, idx) { var view; if ('string' === typeof viewName) { view = get(this, viewName); view = this.createChildView(view); set(this, viewName, view); } else { view = this.createChildView(viewName); } _childViews[idx] = view; }, this); var currentView = get(this, 'currentView'); if (currentView) { _childViews.push(this.createChildView(currentView)); } }, replace: function(idx, removedCount, addedViews) { var addedCount = addedViews ? get(addedViews, 'length') : 0; this.arrayContentWillChange(idx, removedCount, addedCount); this.childViewsWillChange(this._childViews, idx, removedCount); if (addedCount === 0) { this._childViews.splice(idx, removedCount) ; } else { var args = [idx, removedCount].concat(addedViews); this._childViews.splice.apply(this._childViews, args); } this.arrayContentDidChange(idx, removedCount, addedCount); this.childViewsDidChange(this._childViews, idx, removedCount, addedCount); return this; }, objectAt: function(idx) { return this._childViews[idx]; }, length: Ember.computed(function () { return this._childViews.length; }), /** @private Instructs each child view to render to the passed render buffer. @method render @param {Ember.RenderBuffer} buffer the buffer to render to */ render: function(buffer) { this.forEachChildView(function(view) { view.renderToBuffer(buffer); }); }, instrumentName: 'render.container', /** @private When a child view is removed, destroy its element so that it is removed from the DOM. The array observer that triggers this action is set up in the `renderToBuffer` method. @method childViewsWillChange @param {Ember.Array} views the child views array before mutation @param {Number} start the start position of the mutation @param {Number} removed the number of child views removed **/ childViewsWillChange: function(views, start, removed) { this.propertyWillChange('childViews'); if (removed > 0) { var changedViews = views.slice(start, start+removed); // transition to preRender before clearing parentView this.currentState.childViewsWillChange(this, views, start, removed); this.initializeViews(changedViews, null, null); } }, removeChild: function(child) { this.removeObject(child); return this; }, /** @private When a child view is added, make sure the DOM gets updated appropriately. If the view has already rendered an element, we tell the child view to create an element and insert it into the DOM. If the enclosing container view has already written to a buffer, but not yet converted that buffer into an element, we insert the string representation of the child into the appropriate place in the buffer. @method childViewsDidChange @param {Ember.Array} views the array of child views afte the mutation has occurred @param {Number} start the start position of the mutation @param {Number} removed the number of child views removed @param {Number} the number of child views added */ childViewsDidChange: function(views, start, removed, added) { if (added > 0) { var changedViews = views.slice(start, start+added); this.initializeViews(changedViews, this, get(this, 'templateData')); this.currentState.childViewsDidChange(this, views, start, added); } this.propertyDidChange('childViews'); }, initializeViews: function(views, parentView, templateData) { forEach(views, function(view) { set(view, '_parentView', parentView); if (!get(view, 'templateData')) { set(view, 'templateData', templateData); } }); }, currentView: null, _currentViewWillChange: Ember.beforeObserver(function() { var currentView = get(this, 'currentView'); if (currentView) { currentView.destroy(); } }, 'currentView'), _currentViewDidChange: Ember.observer(function() { var currentView = get(this, 'currentView'); if (currentView) { this.pushObject(currentView); } }, 'currentView'), _ensureChildrenAreInDOM: function () { this.currentState.ensureChildrenAreInDOM(this); } }); Ember.merge(states._default, { childViewsWillChange: Ember.K, childViewsDidChange: Ember.K, ensureChildrenAreInDOM: Ember.K }); Ember.merge(states.inBuffer, { childViewsDidChange: function(parentView, views, start, added) { throw new Error('You cannot modify child views while in the inBuffer state'); } }); Ember.merge(states.hasElement, { childViewsWillChange: function(view, views, start, removed) { for (var i=start; i` and the following code: ```javascript someItemsView = Ember.CollectionView.create({ classNames: ['a-collection'], content: ['A','B','C'], itemViewClass: Ember.View.extend({ template: Ember.Handlebars.compile("the letter: {{view.content}}") }) }); someItemsView.appendTo('body'); ``` Will result in the following HTML structure ```html
    the letter: A
    the letter: B
    the letter: C
    ``` ## Automatic matching of parent/child tagNames Setting the `tagName` property of a `CollectionView` to any of "ul", "ol", "table", "thead", "tbody", "tfoot", "tr", or "select" will result in the item views receiving an appropriately matched `tagName` property. Given an empty `` and the following code: ```javascript anUndorderedListView = Ember.CollectionView.create({ tagName: 'ul', content: ['A','B','C'], itemViewClass: Ember.View.extend({ template: Ember.Handlebars.compile("the letter: {{view.content}}") }) }); anUndorderedListView.appendTo('body'); ``` Will result in the following HTML structure ```html
    • the letter: A
    • the letter: B
    • the letter: C
    ``` Additional `tagName` pairs can be provided by adding to `Ember.CollectionView.CONTAINER_MAP ` ```javascript Ember.CollectionView.CONTAINER_MAP['article'] = 'section' ``` ## Programatic creation of child views For cases where additional customization beyond the use of a single `itemViewClass` or `tagName` matching is required CollectionView's `createChildView` method can be overidden: ```javascript CustomCollectionView = Ember.CollectionView.extend({ createChildView: function(viewClass, attrs) { if (attrs.content.kind == 'album') { viewClass = App.AlbumView; } else { viewClass = App.SongView; } this._super(viewClass, attrs); } }); ``` ## Empty View You can provide an `Ember.View` subclass to the `Ember.CollectionView` instance as its `emptyView` property. If the `content` property of a `CollectionView` is set to `null` or an empty array, an instance of this view will be the `CollectionView`s only child. ```javascript aListWithNothing = Ember.CollectionView.create({ classNames: ['nothing'] content: null, emptyView: Ember.View.extend({ template: Ember.Handlebars.compile("The collection is empty") }) }); aListWithNothing.appendTo('body'); ``` Will result in the following HTML structure ```html
    The collection is empty
    ``` ## Adding and Removing items The `childViews` property of a `CollectionView` should not be directly manipulated. Instead, add, remove, replace items from its `content` property. This will trigger appropriate changes to its rendered HTML. ## Use in templates via the `{{collection}}` `Ember.Handlebars` helper `Ember.Handlebars` provides a helper specifically for adding `CollectionView`s to templates. See `Ember.Handlebars.collection` for more details @class CollectionView @namespace Ember @extends Ember.ContainerView @since Ember 0.9 */ Ember.CollectionView = Ember.ContainerView.extend( /** @scope Ember.CollectionView.prototype */ { /** A list of items to be displayed by the `Ember.CollectionView`. @property content @type Ember.Array @default null */ content: null, /** @private This provides metadata about what kind of empty view class this collection would like if it is being instantiated from another system (like Handlebars) @property emptyViewClass */ emptyViewClass: Ember.View, /** An optional view to display if content is set to an empty array. @property emptyView @type Ember.View @default null */ emptyView: null, /** @property itemViewClass @type Ember.View @default Ember.View */ itemViewClass: Ember.View, init: function() { var ret = this._super(); this._contentDidChange(); return ret; }, _contentWillChange: Ember.beforeObserver(function() { var content = this.get('content'); if (content) { content.removeArrayObserver(this); } var len = content ? get(content, 'length') : 0; this.arrayWillChange(content, 0, len); }, 'content'), /** @private Check to make sure that the content has changed, and if so, update the children directly. This is always scheduled asynchronously, to allow the element to be created before bindings have synchronized and vice versa. @method _contentDidChange */ _contentDidChange: Ember.observer(function() { var content = get(this, 'content'); if (content) { content.addArrayObserver(this); } var len = content ? get(content, 'length') : 0; this.arrayDidChange(content, 0, null, len); }, 'content'), willDestroy: function() { var content = get(this, 'content'); if (content) { content.removeArrayObserver(this); } this._super(); if (this._createdEmptyView) { this._createdEmptyView.destroy(); } }, arrayWillChange: function(content, start, removedCount) { // If the contents were empty before and this template collection has an // empty view remove it now. var emptyView = get(this, 'emptyView'); if (emptyView && emptyView instanceof Ember.View) { emptyView.removeFromParent(); } // Loop through child views that correspond with the removed items. // Note that we loop from the end of the array to the beginning because // we are mutating it as we go. var childViews = this._childViews, childView, idx, len; len = this._childViews.length; var removingAll = removedCount === len; if (removingAll) { this.currentState.empty(this); } for (idx = start + removedCount - 1; idx >= start; idx--) { childView = childViews[idx]; if (removingAll) { childView.removedFromDOM = true; } childView.destroy(); } }, /** Called when a mutation to the underlying content array occurs. This method will replay that mutation against the views that compose the `Ember.CollectionView`, ensuring that the view reflects the model. This array observer is added in `contentDidChange`. @method arrayDidChange @param {Array} addedObjects the objects that were added to the content @param {Array} removedObjects the objects that were removed from the content @param {Number} changeIndex the index at which the changes occurred */ arrayDidChange: function(content, start, removed, added) { var itemViewClass = get(this, 'itemViewClass'), addedViews = [], view, item, idx, len, itemTagName; if ('string' === typeof itemViewClass) { itemViewClass = get(itemViewClass); } len = content ? get(content, 'length') : 0; if (len) { for (idx = start; idx < start+added; idx++) { item = content.objectAt(idx); view = this.createChildView(itemViewClass, { content: item, contentIndex: idx }); addedViews.push(view); } } else { var emptyView = get(this, 'emptyView'); if (!emptyView) { return; } var isClass = Ember.CoreView.detect(emptyView); emptyView = this.createChildView(emptyView); addedViews.push(emptyView); set(this, 'emptyView', emptyView); if (isClass) { this._createdEmptyView = emptyView; } } this.replace(start, 0, addedViews); }, createChildView: function(view, attrs) { view = this._super(view, attrs); var itemTagName = get(view, 'tagName'); var tagName = (itemTagName === null || itemTagName === undefined) ? Ember.CollectionView.CONTAINER_MAP[get(this, 'tagName')] : itemTagName; set(view, 'tagName', tagName); return view; } }); /** A map of parent tags to their default child tags. You can add additional parent tags if you want collection views that use a particular parent tag to default to a child tag. @property CONTAINER_MAP @type Hash @static @final */ Ember.CollectionView.CONTAINER_MAP = { ul: 'li', ol: 'li', table: 'tr', thead: 'tr', tbody: 'tr', tfoot: 'tr', tr: 'td', select: 'option' }; })(); (function() { })(); (function() { /*globals jQuery*/ /** Ember Views @module ember @submodule ember-views @requires ember-runtime @main ember-views */ })(); (function() { define("metamorph", [], function() { "use strict"; // ========================================================================== // Project: metamorph // Copyright: ©2011 My Company Inc. All rights reserved. // ========================================================================== var K = function(){}, guid = 0, document = window.document, // Feature-detect the W3C range API, the extended check is for IE9 which only partially supports ranges supportsRange = ('createRange' in document) && (typeof Range !== 'undefined') && Range.prototype.createContextualFragment, // Internet Explorer prior to 9 does not allow setting innerHTML if the first element // is a "zero-scope" element. This problem can be worked around by making // the first node an invisible text node. We, like Modernizr, use ­ needsShy = (function(){ var testEl = document.createElement('div'); testEl.innerHTML = "
    "; testEl.firstChild.innerHTML = ""; return testEl.firstChild.innerHTML === ''; })(), // IE 8 (and likely earlier) likes to move whitespace preceeding // a script tag to appear after it. This means that we can // accidentally remove whitespace when updating a morph. movesWhitespace = (function() { var testEl = document.createElement('div'); testEl.innerHTML = "Test: Value"; return testEl.childNodes[0].nodeValue === 'Test:' && testEl.childNodes[2].nodeValue === ' Value'; })(); // Constructor that supports either Metamorph('foo') or new // Metamorph('foo'); // // Takes a string of HTML as the argument. var Metamorph = function(html) { var self; if (this instanceof Metamorph) { self = this; } else { self = new K(); } self.innerHTML = html; var myGuid = 'metamorph-'+(guid++); self.start = myGuid + '-start'; self.end = myGuid + '-end'; return self; }; K.prototype = Metamorph.prototype; var rangeFor, htmlFunc, removeFunc, outerHTMLFunc, appendToFunc, afterFunc, prependFunc, startTagFunc, endTagFunc; outerHTMLFunc = function() { return this.startTag() + this.innerHTML + this.endTag(); }; startTagFunc = function() { /* * We replace chevron by its hex code in order to prevent escaping problems. * Check this thread for more explaination: * http://stackoverflow.com/questions/8231048/why-use-x3c-instead-of-when-generating-html-from-javascript */ return "hi"; * div.firstChild.firstChild.tagName //=> "" * * If our script markers are inside such a node, we need to find that * node and use *it* as the marker. **/ var realNode = function(start) { while (start.parentNode.tagName === "") { start = start.parentNode; } return start; }; /** * When automatically adding a tbody, Internet Explorer inserts the * tbody immediately before the first . Other browsers create it * before the first node, no matter what. * * This means the the following code: * * div = document.createElement("div"); * div.innerHTML = "
    hi
    * * Generates the following DOM in IE: * * + div * + table * - script id='first' * + tbody * + tr * + td * - "hi" * - script id='last' * * Which means that the two script tags, even though they were * inserted at the same point in the hierarchy in the original * HTML, now have different parents. * * This code reparents the first script tag by making it the tbody's * first child. **/ var fixParentage = function(start, end) { if (start.parentNode !== end.parentNode) { end.parentNode.insertBefore(start, end.parentNode.firstChild); } }; htmlFunc = function(html, outerToo) { // get the real starting node. see realNode for details. var start = realNode(document.getElementById(this.start)); var end = document.getElementById(this.end); var parentNode = end.parentNode; var node, nextSibling, last; // make sure that the start and end nodes share the same // parent. If not, fix it. fixParentage(start, end); // remove all of the nodes after the starting placeholder and // before the ending placeholder. node = start.nextSibling; while (node) { nextSibling = node.nextSibling; last = node === end; // if this is the last node, and we want to remove it as well, // set the `end` node to the next sibling. This is because // for the rest of the function, we insert the new nodes // before the end (note that insertBefore(node, null) is // the same as appendChild(node)). // // if we do not want to remove it, just break. if (last) { if (outerToo) { end = node.nextSibling; } else { break; } } node.parentNode.removeChild(node); // if this is the last node and we didn't break before // (because we wanted to remove the outer nodes), break // now. if (last) { break; } node = nextSibling; } // get the first node for the HTML string, even in cases like // tables and lists where a simple innerHTML on a div would // swallow some of the content. node = firstNodeFor(start.parentNode, html); // copy the nodes for the HTML between the starting and ending // placeholder. while (node) { nextSibling = node.nextSibling; parentNode.insertBefore(node, end); node = nextSibling; } }; // remove the nodes in the DOM representing this metamorph. // // this includes the starting and ending placeholders. removeFunc = function() { var start = realNode(document.getElementById(this.start)); var end = document.getElementById(this.end); this.html(''); start.parentNode.removeChild(start); end.parentNode.removeChild(end); }; appendToFunc = function(parentNode) { var node = firstNodeFor(parentNode, this.outerHTML()); var nextSibling; while (node) { nextSibling = node.nextSibling; parentNode.appendChild(node); node = nextSibling; } }; afterFunc = function(html) { // get the real starting node. see realNode for details. var end = document.getElementById(this.end); var insertBefore = end.nextSibling; var parentNode = end.parentNode; var nextSibling; var node; // get the first node for the HTML string, even in cases like // tables and lists where a simple innerHTML on a div would // swallow some of the content. node = firstNodeFor(parentNode, html); // copy the nodes for the HTML between the starting and ending // placeholder. while (node) { nextSibling = node.nextSibling; parentNode.insertBefore(node, insertBefore); node = nextSibling; } }; prependFunc = function(html) { var start = document.getElementById(this.start); var parentNode = start.parentNode; var nextSibling; var node; node = firstNodeFor(parentNode, html); var insertBefore = start.nextSibling; while (node) { nextSibling = node.nextSibling; parentNode.insertBefore(node, insertBefore); node = nextSibling; } }; } Metamorph.prototype.html = function(html) { this.checkRemoved(); if (html === undefined) { return this.innerHTML; } htmlFunc.call(this, html); this.innerHTML = html; }; Metamorph.prototype.replaceWith = function(html) { this.checkRemoved(); htmlFunc.call(this, html, true); }; Metamorph.prototype.remove = removeFunc; Metamorph.prototype.outerHTML = outerHTMLFunc; Metamorph.prototype.appendTo = appendToFunc; Metamorph.prototype.after = afterFunc; Metamorph.prototype.prepend = prependFunc; Metamorph.prototype.startTag = startTagFunc; Metamorph.prototype.endTag = endTagFunc; Metamorph.prototype.isRemoved = function() { var before = document.getElementById(this.start); var after = document.getElementById(this.end); return !before || !after; }; Metamorph.prototype.checkRemoved = function() { if (this.isRemoved()) { throw new Error("Cannot perform operations on a Metamorph that is not in the DOM."); } }; return Metamorph; }); })(); (function() { /** @module ember @submodule ember-handlebars */ // Eliminate dependency on any Ember to simplify precompilation workflow var objectCreate = Object.create || function(parent) { function F() {} F.prototype = parent; return new F(); }; var Handlebars = this.Handlebars || Ember.imports.Handlebars; /** Prepares the Handlebars templating library for use inside Ember's view system. The `Ember.Handlebars` object is the standard Handlebars library, extended to use Ember's `get()` method instead of direct property access, which allows computed properties to be used inside templates. To create an `Ember.Handlebars` template, call `Ember.Handlebars.compile()`. This will return a function that can be used by `Ember.View` for rendering. @class Handlebars @namespace Ember */ Ember.Handlebars = objectCreate(Handlebars); /** @class helpers @namespace Ember.Handlebars */ Ember.Handlebars.helpers = objectCreate(Handlebars.helpers); /** Override the the opcode compiler and JavaScript compiler for Handlebars. @class Compiler @namespace Ember.Handlebars @private @constructor */ Ember.Handlebars.Compiler = function() {}; // Handlebars.Compiler doesn't exist in runtime-only if (Handlebars.Compiler) { Ember.Handlebars.Compiler.prototype = objectCreate(Handlebars.Compiler.prototype); } Ember.Handlebars.Compiler.prototype.compiler = Ember.Handlebars.Compiler; /** @class JavaScriptCompiler @namespace Ember.Handlebars @private @constructor */ Ember.Handlebars.JavaScriptCompiler = function() {}; // Handlebars.JavaScriptCompiler doesn't exist in runtime-only if (Handlebars.JavaScriptCompiler) { Ember.Handlebars.JavaScriptCompiler.prototype = objectCreate(Handlebars.JavaScriptCompiler.prototype); Ember.Handlebars.JavaScriptCompiler.prototype.compiler = Ember.Handlebars.JavaScriptCompiler; } Ember.Handlebars.JavaScriptCompiler.prototype.namespace = "Ember.Handlebars"; Ember.Handlebars.JavaScriptCompiler.prototype.initializeBuffer = function() { return "''"; }; /** @private Override the default buffer for Ember Handlebars. By default, Handlebars creates an empty String at the beginning of each invocation and appends to it. Ember's Handlebars overrides this to append to a single shared buffer. @method appendToBuffer @param string {String} */ Ember.Handlebars.JavaScriptCompiler.prototype.appendToBuffer = function(string) { return "data.buffer.push("+string+");"; }; var prefix = "ember" + (+new Date()), incr = 1; /** @private Rewrite simple mustaches from `{{foo}}` to `{{bind "foo"}}`. This means that all simple mustaches in Ember's Handlebars will also set up an observer to keep the DOM up to date when the underlying property changes. @method mustache @for Ember.Handlebars.Compiler @param mustache */ Ember.Handlebars.Compiler.prototype.mustache = function(mustache) { if (mustache.isHelper && mustache.id.string === 'control') { mustache.hash = mustache.hash || new Handlebars.AST.HashNode([]); mustache.hash.pairs.push(["controlID", new Handlebars.AST.StringNode(prefix + incr++)]); } else if (mustache.params.length || mustache.hash) { // no changes required } else { var id = new Handlebars.AST.IdNode(['_triageMustache']); // Update the mustache node to include a hash value indicating whether the original node // was escaped. This will allow us to properly escape values when the underlying value // changes and we need to re-render the value. if(!mustache.escaped) { mustache.hash = mustache.hash || new Handlebars.AST.HashNode([]); mustache.hash.pairs.push(["unescaped", new Handlebars.AST.StringNode("true")]); } mustache = new Handlebars.AST.MustacheNode([id].concat([mustache.id]), mustache.hash, !mustache.escaped); } return Handlebars.Compiler.prototype.mustache.call(this, mustache); }; /** Used for precompilation of Ember Handlebars templates. This will not be used during normal app execution. @method precompile @for Ember.Handlebars @static @param {String} string The template to precompile */ Ember.Handlebars.precompile = function(string) { var ast = Handlebars.parse(string); var options = { knownHelpers: { action: true, unbound: true, bindAttr: true, template: true, view: true, _triageMustache: true }, data: true, stringParams: true }; var environment = new Ember.Handlebars.Compiler().compile(ast, options); return new Ember.Handlebars.JavaScriptCompiler().compile(environment, options, undefined, true); }; // We don't support this for Handlebars runtime-only if (Handlebars.compile) { /** The entry point for Ember Handlebars. This replaces the default `Handlebars.compile` and turns on template-local data and String parameters. @method compile @for Ember.Handlebars @static @param {String} string The template to compile @return {Function} */ Ember.Handlebars.compile = function(string) { var ast = Handlebars.parse(string); var options = { data: true, stringParams: true }; var environment = new Ember.Handlebars.Compiler().compile(ast, options); var templateSpec = new Ember.Handlebars.JavaScriptCompiler().compile(environment, options, undefined, true); return Ember.Handlebars.template(templateSpec); }; } })(); (function() { var slice = Array.prototype.slice; /** @private If a path starts with a reserved keyword, returns the root that should be used. @method normalizePath @for Ember @param root {Object} @param path {String} @param data {Hash} */ var normalizePath = Ember.Handlebars.normalizePath = function(root, path, data) { var keywords = (data && data.keywords) || {}, keyword, isKeyword; // Get the first segment of the path. For example, if the // path is "foo.bar.baz", returns "foo". keyword = path.split('.', 1)[0]; // Test to see if the first path is a keyword that has been // passed along in the view's data hash. If so, we will treat // that object as the new root. if (keywords.hasOwnProperty(keyword)) { // Look up the value in the template's data hash. root = keywords[keyword]; isKeyword = true; // Handle cases where the entire path is the reserved // word. In that case, return the object itself. if (path === keyword) { path = ''; } else { // Strip the keyword from the path and look up // the remainder from the newly found root. path = path.substr(keyword.length+1); } } return { root: root, path: path, isKeyword: isKeyword }; }; /** Lookup both on root and on window. If the path starts with a keyword, the corresponding object will be looked up in the template's data hash and used to resolve the path. @method get @for Ember.Handlebars @param {Object} root The object to look up the property on @param {String} path The path to be lookedup @param {Object} options The template's option hash */ var handlebarsGet = Ember.Handlebars.get = function(root, path, options) { var data = options && options.data, normalizedPath = normalizePath(root, path, data), value; // In cases where the path begins with a keyword, change the // root to the value represented by that keyword, and ensure // the path is relative to it. root = normalizedPath.root; path = normalizedPath.path; value = Ember.get(root, path); // If the path starts with a capital letter, look it up on Ember.lookup, // which defaults to the `window` object in browsers. if (value === undefined && root !== Ember.lookup && Ember.isGlobalPath(path)) { value = Ember.get(Ember.lookup, path); } return value; }; Ember.Handlebars.getPath = Ember.deprecateFunc('`Ember.Handlebars.getPath` has been changed to `Ember.Handlebars.get` for consistency.', Ember.Handlebars.get); Ember.Handlebars.resolveParams = function(context, params, options) { var resolvedParams = [], types = options.types, param, type; for (var i=0, l=params.length; i ``` The above handlebars template will fill the ``'s `src` attribute will the value of the property referenced with `"imageUrl"` and its `alt` attribute with the value of the property referenced with `"imageTitle"`. If the rendering context of this template is the following object: ```javascript { imageUrl: 'http://lolcats.info/haz-a-funny', imageTitle: 'A humorous image of a cat' } ``` The resulting HTML output will be: ```html A humorous image of a cat ``` `bindAttr` cannot redeclare existing DOM element attributes. The use of `src` in the following `bindAttr` example will be ignored and the hard coded value of `src="/failwhale.gif"` will take precedence: ```handlebars imageTitle ``` ### `bindAttr` and the `class` attribute `bindAttr` supports a special syntax for handling a number of cases unique to the `class` DOM element attribute. The `class` attribute combines multiple discreet values into a single attribute as a space-delimited list of strings. Each string can be: * a string return value of an object's property. * a boolean return value of an object's property * a hard-coded value A string return value works identically to other uses of `bindAttr`. The return value of the property will become the value of the attribute. For example, the following view and template: ```javascript AView = Ember.View.extend({ someProperty: function(){ return "aValue"; }.property() }) ``` ```handlebars ``` A boolean return value will insert a specified class name if the property returns `true` and remove the class name if the property returns `false`. A class name is provided via the syntax `somePropertyName:class-name-if-true`. ```javascript AView = Ember.View.extend({ someBool: true }) ``` ```handlebars ``` Result in the following rendered output: ```html ``` An additional section of the binding can be provided if you want to replace the existing class instead of removing it when the boolean value changes: ```handlebars ``` A hard-coded value can be used by prepending `:` to the desired class name: `:class-name-to-always-apply`. ```handlebars ``` Results in the following rendered output: ```html ``` All three strategies - string return value, boolean return value, and hard-coded value – can be combined in a single declaration: ```handlebars ``` @method bindAttr @for Ember.Handlebars.helpers @param {Hash} options @return {String} HTML string */ EmberHandlebars.registerHelper('bindAttr', function(options) { var attrs = options.hash; var view = options.data.view; var ret = []; var ctx = this; // Generate a unique id for this element. This will be added as a // data attribute to the element so it can be looked up when // the bound property changes. var dataId = ++Ember.uuid; // Handle classes differently, as we can bind multiple classes var classBindings = attrs['class']; if (classBindings !== null && classBindings !== undefined) { var classResults = EmberHandlebars.bindClasses(this, classBindings, view, dataId, options); ret.push('class="' + Handlebars.Utils.escapeExpression(classResults.join(' ')) + '"'); delete attrs['class']; } var attrKeys = Ember.keys(attrs); // For each attribute passed, create an observer and emit the // current value of the property as an attribute. forEach.call(attrKeys, function(attr) { var path = attrs[attr], pathRoot, normalized; normalized = normalizePath(ctx, path, options.data); pathRoot = normalized.root; path = normalized.path; var value = (path === 'this') ? pathRoot : handlebarsGet(pathRoot, path, options), type = Ember.typeOf(value); var observer, invoker; observer = function observer() { var result = handlebarsGet(pathRoot, path, options); var elem = view.$("[data-bindattr-" + dataId + "='" + dataId + "']"); // If we aren't able to find the element, it means the element // to which we were bound has been removed from the view. // In that case, we can assume the template has been re-rendered // and we need to clean up the observer. if (!elem || elem.length === 0) { Ember.removeObserver(pathRoot, path, invoker); return; } Ember.View.applyAttributeBindings(elem, attr, result); }; invoker = function() { Ember.run.scheduleOnce('render', observer); }; // Add an observer to the view for when the property changes. // When the observer fires, find the element using the // unique data id and update the attribute to the new value. if (path !== 'this') { view.registerObserver(pathRoot, path, invoker); } // if this changes, also change the logic in ember-views/lib/views/view.js if ((type === 'string' || (type === 'number' && !isNaN(value)))) { ret.push(attr + '="' + Handlebars.Utils.escapeExpression(value) + '"'); } else if (value && type === 'boolean') { // The developer controls the attr name, so it should always be safe ret.push(attr + '="' + attr + '"'); } }, this); // Add the unique identifier // NOTE: We use all lower-case since Firefox has problems with mixed case in SVG ret.push('data-bindattr-' + dataId + '="' + dataId + '"'); return new EmberHandlebars.SafeString(ret.join(' ')); }); /** @private Helper that, given a space-separated string of property paths and a context, returns an array of class names. Calling this method also has the side effect of setting up observers at those property paths, such that if they change, the correct class name will be reapplied to the DOM element. For example, if you pass the string "fooBar", it will first look up the "fooBar" value of the context. If that value is true, it will add the "foo-bar" class to the current element (i.e., the dasherized form of "fooBar"). If the value is a string, it will add that string as the class. Otherwise, it will not add any new class name. @method bindClasses @for Ember.Handlebars @param {Ember.Object} context The context from which to lookup properties @param {String} classBindings A string, space-separated, of class bindings to use @param {Ember.View} view The view in which observers should look for the element to update @param {Srting} bindAttrId Optional bindAttr id used to lookup elements @return {Array} An array of class names to add */ EmberHandlebars.bindClasses = function(context, classBindings, view, bindAttrId, options) { var ret = [], newClass, value, elem; // Helper method to retrieve the property from the context and // determine which class string to return, based on whether it is // a Boolean or not. var classStringForPath = function(root, parsedPath, options) { var val, path = parsedPath.path; if (path === 'this') { val = root; } else if (path === '') { val = true; } else { val = handlebarsGet(root, path, options); } return Ember.View._classStringForValue(path, val, parsedPath.className, parsedPath.falsyClassName); }; // For each property passed, loop through and setup // an observer. forEach.call(classBindings.split(' '), function(binding) { // Variable in which the old class value is saved. The observer function // closes over this variable, so it knows which string to remove when // the property changes. var oldClass; var observer, invoker; var parsedPath = Ember.View._parsePropertyPath(binding), path = parsedPath.path, pathRoot = context, normalized; if (path !== '' && path !== 'this') { normalized = normalizePath(context, path, options.data); pathRoot = normalized.root; path = normalized.path; } // Set up an observer on the context. If the property changes, toggle the // class name. observer = function() { // Get the current value of the property newClass = classStringForPath(pathRoot, parsedPath, options); elem = bindAttrId ? view.$("[data-bindattr-" + bindAttrId + "='" + bindAttrId + "']") : view.$(); // If we can't find the element anymore, a parent template has been // re-rendered and we've been nuked. Remove the observer. if (!elem || elem.length === 0) { Ember.removeObserver(pathRoot, path, invoker); } else { // If we had previously added a class to the element, remove it. if (oldClass) { elem.removeClass(oldClass); } // If necessary, add a new class. Make sure we keep track of it so // it can be removed in the future. if (newClass) { elem.addClass(newClass); oldClass = newClass; } else { oldClass = null; } } }; invoker = function() { Ember.run.scheduleOnce('render', observer); }; if (path !== '' && path !== 'this') { view.registerObserver(pathRoot, path, invoker); } // We've already setup the observer; now we just need to figure out the // correct behavior right now on the first pass through. value = classStringForPath(pathRoot, parsedPath, options); if (value) { ret.push(value); // Make sure we save the current value so that it can be removed if the // observer fires. oldClass = value; } }); return ret; }; })(); (function() { /*globals Handlebars */ // TODO: Don't require the entire module /** @module ember @submodule ember-handlebars */ var get = Ember.get, set = Ember.set; var PARENT_VIEW_PATH = /^parentView\./; var EmberHandlebars = Ember.Handlebars; EmberHandlebars.ViewHelper = Ember.Object.create({ propertiesFromHTMLOptions: function(options, thisContext) { var hash = options.hash, data = options.data; var extensions = {}, classes = hash['class'], dup = false; if (hash.id) { extensions.elementId = hash.id; dup = true; } if (classes) { classes = classes.split(' '); extensions.classNames = classes; dup = true; } if (hash.classBinding) { extensions.classNameBindings = hash.classBinding.split(' '); dup = true; } if (hash.classNameBindings) { if (extensions.classNameBindings === undefined) extensions.classNameBindings = []; extensions.classNameBindings = extensions.classNameBindings.concat(hash.classNameBindings.split(' ')); dup = true; } if (hash.attributeBindings) { extensions.attributeBindings = null; dup = true; } if (dup) { hash = Ember.$.extend({}, hash); delete hash.id; delete hash['class']; delete hash.classBinding; } // Set the proper context for all bindings passed to the helper. This applies to regular attribute bindings // as well as class name bindings. If the bindings are local, make them relative to the current context // instead of the view. var path; // Evaluate the context of regular attribute bindings: for (var prop in hash) { if (!hash.hasOwnProperty(prop)) { continue; } // Test if the property ends in "Binding" if (Ember.IS_BINDING.test(prop) && typeof hash[prop] === 'string') { path = this.contextualizeBindingPath(hash[prop], data); if (path) { hash[prop] = path; } } } // Evaluate the context of class name bindings: if (extensions.classNameBindings) { for (var b in extensions.classNameBindings) { var full = extensions.classNameBindings[b]; if (typeof full === 'string') { // Contextualize the path of classNameBinding so this: // // classNameBinding="isGreen:green" // // is converted to this: // // classNameBinding="_parentView.context.isGreen:green" var parsedPath = Ember.View._parsePropertyPath(full); path = this.contextualizeBindingPath(parsedPath.path, data); if (path) { extensions.classNameBindings[b] = path + parsedPath.classNames; } } } } return Ember.$.extend(hash, extensions); }, // Transform bindings from the current context to a context that can be evaluated within the view. // Returns null if the path shouldn't be changed. // // TODO: consider the addition of a prefix that would allow this method to return `path`. contextualizeBindingPath: function(path, data) { var normalized = Ember.Handlebars.normalizePath(null, path, data); if (normalized.isKeyword) { return 'templateData.keywords.' + path; } else if (Ember.isGlobalPath(path)) { return null; } else if (path === 'this') { return '_parentView.context'; } else { return '_parentView.context.' + path; } }, helper: function(thisContext, path, options) { var inverse = options.inverse, data = options.data, view = data.view, fn = options.fn, hash = options.hash, newView; if ('string' === typeof path) { newView = EmberHandlebars.get(thisContext, path, options); } else { newView = path; } var viewOptions = this.propertiesFromHTMLOptions(options, thisContext); var currentView = data.view; viewOptions.templateData = options.data; var newViewProto = newView.proto ? newView.proto() : newView; if (fn) { viewOptions.template = fn; } // We only want to override the `_context` computed property if there is // no specified controller. See View#_context for more information. if (!newViewProto.controller && !newViewProto.controllerBinding && !viewOptions.controller && !viewOptions.controllerBinding) { viewOptions._context = thisContext; } currentView.appendChild(newView, viewOptions); } }); /** `{{view}}` inserts a new instance of `Ember.View` into a template passing its options to the `Ember.View`'s `create` method and using the supplied block as the view's own template. An empty `` and the following template: ```handlebars A span: {{#view tagName="span"}} hello. {{/view}} ``` Will result in HTML structure: ```html
    A span: Hello.
    ``` ### `parentView` setting The `parentView` property of the new `Ember.View` instance created through `{{view}}` will be set to the `Ember.View` instance of the template where `{{view}}` was called. ```javascript aView = Ember.View.create({ template: Ember.Handlebars.compile("{{#view}} my parent: {{parentView.elementId}} {{/view}}") }); aView.appendTo('body'); ``` Will result in HTML structure: ```html
    my parent: ember1
    ``` ### Setting CSS id and class attributes The HTML `id` attribute can be set on the `{{view}}`'s resulting element with the `id` option. This option will _not_ be passed to `Ember.View.create`. ```handlebars {{#view tagName="span" id="a-custom-id"}} hello. {{/view}} ``` Results in the following HTML structure: ```html
    hello.
    ``` The HTML `class` attribute can be set on the `{{view}}`'s resulting element with the `class` or `classNameBindings` options. The `class` option will directly set the CSS `class` attribute and will not be passed to `Ember.View.create`. `classNameBindings` will be passed to `create` and use `Ember.View`'s class name binding functionality: ```handlebars {{#view tagName="span" class="a-custom-class"}} hello. {{/view}} ``` Results in the following HTML structure: ```html
    hello.
    ``` ### Supplying a different view class `{{view}}` can take an optional first argument before its supplied options to specify a path to a custom view class. ```handlebars {{#view "MyApp.CustomView"}} hello. {{/view}} ``` The first argument can also be a relative path. Ember will search for the view class starting at the `Ember.View` of the template where `{{view}}` was used as the root object: ```javascript MyApp = Ember.Application.create({}); MyApp.OuterView = Ember.View.extend({ innerViewClass: Ember.View.extend({ classNames: ['a-custom-view-class-as-property'] }), template: Ember.Handlebars.compile('{{#view "innerViewClass"}} hi {{/view}}') }); MyApp.OuterView.create().appendTo('body'); ``` Will result in the following HTML: ```html
    hi
    ``` ### Blockless use If you supply a custom `Ember.View` subclass that specifies its own template or provide a `templateName` option to `{{view}}` it can be used without supplying a block. Attempts to use both a `templateName` option and supply a block will throw an error. ```handlebars {{view "MyApp.ViewWithATemplateDefined"}} ``` ### `viewName` property You can supply a `viewName` option to `{{view}}`. The `Ember.View` instance will be referenced as a property of its parent view by this name. ```javascript aView = Ember.View.create({ template: Ember.Handlebars.compile('{{#view viewName="aChildByName"}} hi {{/view}}') }); aView.appendTo('body'); aView.get('aChildByName') // the instance of Ember.View created by {{view}} helper ``` @method view @for Ember.Handlebars.helpers @param {String} path @param {Hash} options @return {String} HTML string */ EmberHandlebars.registerHelper('view', function(path, options) { // If no path is provided, treat path param as options. if (path && path.data && path.data.isRenderData) { options = path; path = "Ember.View"; } return EmberHandlebars.ViewHelper.helper(this, path, options); }); })(); (function() { /*globals Handlebars */ // TODO: Don't require all of this module /** @module ember @submodule ember-handlebars */ var get = Ember.get, handlebarsGet = Ember.Handlebars.get, fmt = Ember.String.fmt; /** `{{collection}}` is a `Ember.Handlebars` helper for adding instances of `Ember.CollectionView` to a template. See `Ember.CollectionView` for additional information on how a `CollectionView` functions. `{{collection}}`'s primary use is as a block helper with a `contentBinding` option pointing towards an `Ember.Array`-compatible object. An `Ember.View` instance will be created for each item in its `content` property. Each view will have its own `content` property set to the appropriate item in the collection. The provided block will be applied as the template for each item's view. Given an empty `` the following template: ```handlebars {{#collection contentBinding="App.items"}} Hi {{view.content.name}} {{/collection}} ``` And the following application code ```javascript App = Ember.Application.create() App.items = [ Ember.Object.create({name: 'Dave'}), Ember.Object.create({name: 'Mary'}), Ember.Object.create({name: 'Sara'}) ] ``` Will result in the HTML structure below ```html
    Hi Dave
    Hi Mary
    Hi Sara
    ``` ### Blockless Use If you provide an `itemViewClass` option that has its own `template` you can omit the block. The following template: ```handlebars {{collection contentBinding="App.items" itemViewClass="App.AnItemView"}} ``` And application code ```javascript App = Ember.Application.create(); App.items = [ Ember.Object.create({name: 'Dave'}), Ember.Object.create({name: 'Mary'}), Ember.Object.create({name: 'Sara'}) ]; App.AnItemView = Ember.View.extend({ template: Ember.Handlebars.compile("Greetings {{view.content.name}}") }); ``` Will result in the HTML structure below ```html
    Greetings Dave
    Greetings Mary
    Greetings Sara
    ``` ### Specifying a CollectionView subclass By default the `{{collection}}` helper will create an instance of `Ember.CollectionView`. You can supply a `Ember.CollectionView` subclass to the helper by passing it as the first argument: ```handlebars {{#collection App.MyCustomCollectionClass contentBinding="App.items"}} Hi {{view.content.name}} {{/collection}} ``` ### Forwarded `item.*`-named Options As with the `{{view}}`, helper options passed to the `{{collection}}` will be set on the resulting `Ember.CollectionView` as properties. Additionally, options prefixed with `item` will be applied to the views rendered for each item (note the camelcasing): ```handlebars {{#collection contentBinding="App.items" itemTagName="p" itemClassNames="greeting"}} Howdy {{view.content.name}} {{/collection}} ``` Will result in the following HTML structure: ```html

    Howdy Dave

    Howdy Mary

    Howdy Sara

    ``` @method collection @for Ember.Handlebars.helpers @param {String} path @param {Hash} options @return {String} HTML string @deprecated Use `{{each}}` helper instead. */ Ember.Handlebars.registerHelper('collection', function(path, options) { // If no path is provided, treat path param as options. if (path && path.data && path.data.isRenderData) { options = path; path = undefined; } else { } var fn = options.fn; var data = options.data; var inverse = options.inverse; var view = options.data.view; // If passed a path string, convert that into an object. // Otherwise, just default to the standard class. var collectionClass; collectionClass = path ? handlebarsGet(this, path, options) : Ember.CollectionView; var hash = options.hash, itemHash = {}, match; // Extract item view class if provided else default to the standard class var itemViewClass, itemViewPath = hash.itemViewClass; var collectionPrototype = collectionClass.proto(); delete hash.itemViewClass; itemViewClass = itemViewPath ? handlebarsGet(collectionPrototype, itemViewPath, options) : collectionPrototype.itemViewClass; // Go through options passed to the {{collection}} helper and extract options // that configure item views instead of the collection itself. for (var prop in hash) { if (hash.hasOwnProperty(prop)) { match = prop.match(/^item(.)(.*)$/); if(match && prop !== 'itemController') { // Convert itemShouldFoo -> shouldFoo itemHash[match[1].toLowerCase() + match[2]] = hash[prop]; // Delete from hash as this will end up getting passed to the // {{view}} helper method. delete hash[prop]; } } } var tagName = hash.tagName || collectionPrototype.tagName; if (fn) { itemHash.template = fn; delete options.fn; } var emptyViewClass; if (inverse && inverse !== Handlebars.VM.noop) { emptyViewClass = get(collectionPrototype, 'emptyViewClass'); emptyViewClass = emptyViewClass.extend({ template: inverse, tagName: itemHash.tagName }); } else if (hash.emptyViewClass) { emptyViewClass = handlebarsGet(this, hash.emptyViewClass, options); } if (emptyViewClass) { hash.emptyView = emptyViewClass; } if(!hash.keyword){ itemHash._context = Ember.computed.alias('content'); } var viewString = view.toString(); var viewOptions = Ember.Handlebars.ViewHelper.propertiesFromHTMLOptions({ data: data, hash: itemHash }, this); hash.itemViewClass = itemViewClass.extend(viewOptions); return Ember.Handlebars.helpers.view.call(this, collectionClass, options); }); })(); (function() { /*globals Handlebars */ /** @module ember @submodule ember-handlebars */ var handlebarsGet = Ember.Handlebars.get; /** `unbound` allows you to output a property without binding. *Important:* The output will not be updated if the property changes. Use with caution. ```handlebars
    {{unbound somePropertyThatDoesntChange}}
    ``` `unbound` can also be used in conjunction with a bound helper to render it in its unbound form: ```handlebars
    {{unbound helperName somePropertyThatDoesntChange}}
    ``` @method unbound @for Ember.Handlebars.helpers @param {String} property @return {String} HTML string */ Ember.Handlebars.registerHelper('unbound', function(property, fn) { var options = arguments[arguments.length - 1], helper, context, out; if(arguments.length > 2) { // Unbound helper call. options.data.isUnbound = true; helper = Ember.Handlebars.helpers[arguments[0]] || Ember.Handlebars.helperMissing; out = helper.apply(this, Array.prototype.slice.call(arguments, 1)); delete options.data.isUnbound; return out; } context = (fn.contexts && fn.contexts[0]) || this; return handlebarsGet(context, property, fn); }); })(); (function() { /*jshint debug:true*/ /** @module ember @submodule ember-handlebars */ var handlebarsGet = Ember.Handlebars.get, normalizePath = Ember.Handlebars.normalizePath; /** `log` allows you to output the value of a value in the current rendering context. ```handlebars {{log myVariable}} ``` @method log @for Ember.Handlebars.helpers @param {String} property */ Ember.Handlebars.registerHelper('log', function(property, options) { var context = (options.contexts && options.contexts[0]) || this, normalized = normalizePath(context, property, options.data), pathRoot = normalized.root, path = normalized.path, value = (path === 'this') ? pathRoot : handlebarsGet(pathRoot, path, options); Ember.Logger.log(value); }); /** Execute the `debugger` statement in the current context. ```handlebars {{debugger}} ``` @method debugger @for Ember.Handlebars.helpers @param {String} property */ Ember.Handlebars.registerHelper('debugger', function() { debugger; }); })(); (function() { /** @module ember @submodule ember-handlebars */ var get = Ember.get, set = Ember.set; Ember.Handlebars.EachView = Ember.CollectionView.extend(Ember._Metamorph, { init: function() { var itemController = get(this, 'itemController'); var binding; if (itemController) { var controller = Ember.ArrayController.create(); set(controller, 'itemController', itemController); set(controller, 'container', get(this, 'controller.container')); set(controller, '_eachView', this); this.disableContentObservers(function() { set(this, 'content', controller); binding = new Ember.Binding('content', '_eachView.dataSource').oneWay(); binding.connect(controller); }); set(this, '_arrayController', controller); } else { this.disableContentObservers(function() { binding = new Ember.Binding('content', 'dataSource').oneWay(); binding.connect(this); }); } return this._super(); }, disableContentObservers: function(callback) { Ember.removeBeforeObserver(this, 'content', null, '_contentWillChange'); Ember.removeObserver(this, 'content', null, '_contentDidChange'); callback.apply(this); Ember.addBeforeObserver(this, 'content', null, '_contentWillChange'); Ember.addObserver(this, 'content', null, '_contentDidChange'); }, itemViewClass: Ember._MetamorphView, emptyViewClass: Ember._MetamorphView, createChildView: function(view, attrs) { view = this._super(view, attrs); // At the moment, if a container view subclass wants // to insert keywords, it is responsible for cloning // the keywords hash. This will be fixed momentarily. var keyword = get(this, 'keyword'); var content = get(view, 'content'); if (keyword) { var data = get(view, 'templateData'); data = Ember.copy(data); data.keywords = view.cloneKeywords(); set(view, 'templateData', data); // In this case, we do not bind, because the `content` of // a #each item cannot change. data.keywords[keyword] = content; } // If {{#each}} is looping over an array of controllers, // point each child view at their respective controller. if (content && get(content, 'isController')) { set(view, 'controller', content); } return view; }, willDestroy: function() { var arrayController = get(this, '_arrayController'); if (arrayController) { arrayController.destroy(); } return this._super(); } }); var GroupedEach = Ember.Handlebars.GroupedEach = function(context, path, options) { var self = this, normalized = Ember.Handlebars.normalizePath(context, path, options.data); this.context = context; this.path = path; this.options = options; this.template = options.fn; this.containingView = options.data.view; this.normalizedRoot = normalized.root; this.normalizedPath = normalized.path; this.content = this.lookupContent(); this.addContentObservers(); this.addArrayObservers(); this.containingView.on('willClearRender', function() { self.destroy(); }); }; GroupedEach.prototype = { contentWillChange: function() { this.removeArrayObservers(); }, contentDidChange: function() { this.content = this.lookupContent(); this.addArrayObservers(); this.rerenderContainingView(); }, contentArrayWillChange: Ember.K, contentArrayDidChange: function() { this.rerenderContainingView(); }, lookupContent: function() { return Ember.Handlebars.get(this.normalizedRoot, this.normalizedPath, this.options); }, addArrayObservers: function() { this.content.addArrayObserver(this, { willChange: 'contentArrayWillChange', didChange: 'contentArrayDidChange' }); }, removeArrayObservers: function() { this.content.removeArrayObserver(this, { willChange: 'contentArrayWillChange', didChange: 'contentArrayDidChange' }); }, addContentObservers: function() { Ember.addBeforeObserver(this.normalizedRoot, this.normalizedPath, this, this.contentWillChange); Ember.addObserver(this.normalizedRoot, this.normalizedPath, this, this.contentDidChange); }, removeContentObservers: function() { Ember.removeBeforeObserver(this.normalizedRoot, this.normalizedPath, this.contentWillChange); Ember.removeObserver(this.normalizedRoot, this.normalizedPath, this.contentDidChange); }, render: function() { var content = this.content, contentLength = get(content, 'length'), data = this.options.data, template = this.template; data.insideEach = true; for (var i = 0; i < contentLength; i++) { template(content.objectAt(i), { data: data }); } }, rerenderContainingView: function() { Ember.run.scheduleOnce('render', this.containingView, 'rerender'); }, destroy: function() { this.removeContentObservers(); this.removeArrayObservers(); } }; /** The `{{#each}}` helper loops over elements in a collection, rendering its block once for each item. It is an extension of the base Handlebars `{{#each}}` helper: ```javascript Developers = [{name: 'Yehuda'},{name: 'Tom'}, {name: 'Paul'}]; ``` ```handlebars {{#each Developers}} {{name}} {{/each}} ``` `{{each}}` supports an alternative syntax with element naming: ```handlebars {{#each person in Developers}} {{person.name}} {{/each}} ``` When looping over objects that do not have properties, `{{this}}` can be used to render the object: ```javascript DeveloperNames = ['Yehuda', 'Tom', 'Paul'] ``` ```handlebars {{#each DeveloperNames}} {{this}} {{/each}} ``` ### {{else}} condition `{{#each}}` can have a matching `{{else}}`. The contents of this block will render if the collection is empty. ``` {{#each person in Developers}} {{person.name}} {{else}}

    Sorry, nobody is available for this task.

    {{/each}} ``` ### Specifying a View class for items If you provide an `itemViewClass` option that references a view class with its own `template` you can omit the block. The following template: ```handlebars {{#view App.MyView }} {{each view.items itemViewClass="App.AnItemView"}} {{/view}} ``` And application code ```javascript App = Ember.Application.create({ MyView: Ember.View.extend({ items: [ Ember.Object.create({name: 'Dave'}), Ember.Object.create({name: 'Mary'}), Ember.Object.create({name: 'Sara'}) ] }) }); App.AnItemView = Ember.View.extend({ template: Ember.Handlebars.compile("Greetings {{name}}") }); ``` Will result in the HTML structure below ```html
    Greetings Dave
    Greetings Mary
    Greetings Sara
    ``` ### Representing each item with a Controller. By default the controller lookup within an `{{#each}}` block will be the controller of the template where the `{{#each}}` was used. If each item needs to be presented by a custom controller you can provide a `itemController` option which references a controller by lookup name. Each item in the loop will be wrapped in an instance of this controller and the item itself will be set to the `content` property of that controller. This is useful in cases where properties of model objects need transformation or synthesis for display: ```javascript App.DeveloperController = Ember.ObjectController.extend({ isAvailableForHire: function(){ return !this.get('content.isEmployed') && this.get('content.isSeekingWork'); }.property('isEmployed', 'isSeekingWork') }) ``` ```handlebars {{#each person in Developers itemController="developer"}} {{person.name}} {{#if person.isAvailableForHire}}Hire me!{{/if}} {{/each}} ``` @method each @for Ember.Handlebars.helpers @param [name] {String} name for item (used with `in`) @param path {String} path @param [options] {Object} Handlebars key/value pairs of options @param [options.itemViewClass] {String} a path to a view class used for each item @param [options.itemController] {String} name of a controller to be created for each item */ Ember.Handlebars.registerHelper('each', function(path, options) { if (arguments.length === 4) { var keywordName = arguments[0]; options = arguments[3]; path = arguments[2]; if (path === '') { path = "this"; } options.hash.keyword = keywordName; } options.hash.dataSourceBinding = path; // Set up emptyView as a metamorph with no tag //options.hash.emptyViewClass = Ember._MetamorphView; if (options.data.insideGroup && !options.hash.groupedRows && !options.hash.itemViewClass) { new Ember.Handlebars.GroupedEach(this, path, options).render(); } else { return Ember.Handlebars.helpers.collection.call(this, 'Ember.Handlebars.EachView', options); } }); })(); (function() { /** @module ember @submodule ember-handlebars */ /** `template` allows you to render a template from inside another template. This allows you to re-use the same template in multiple places. For example: ```html ``` ```html ``` This helper looks for templates in the global `Ember.TEMPLATES` hash. If you add ` ``` And application code ```javascript AController = Ember.Controller.extend({ anActionName: function() {} }); AView = Ember.View.extend({ controller: AController.create(), templateName: 'a-template' }); aView = AView.create(); aView.appendTo('body'); ``` Will results in the following rendered HTML ```html
    click me
    ``` Clicking "click me" will trigger the `anActionName` method of the `AController`. In this case, no additional parameters will be passed. If you provide additional parameters to the helper: ```handlebars ``` Those parameters will be passed along as arguments to the JavaScript function implementing the action. ### Event Propagation Events triggered through the action helper will automatically have `.preventDefault()` called on them. You do not need to do so in your event handlers. To also disable bubbling, pass `bubbles=false` to the helper: ```handlebars ``` If you need the default handler to trigger you should either register your own event handler, or use event methods on your view class. See `Ember.View` 'Responding to Browser Events' for more information. ### Specifying DOM event type By default the `{{action}}` helper registers for DOM `click` events. You can supply an `on` option to the helper to specify a different DOM event name: ```handlebars ``` See `Ember.View` 'Responding to Browser Events' for a list of acceptable DOM event names. NOTE: Because `{{action}}` depends on Ember's event dispatch system it will only function if an `Ember.EventDispatcher` instance is available. An `Ember.EventDispatcher` instance will be created when a new `Ember.Application` is created. Having an instance of `Ember.Application` will satisfy this requirement. ### Specifying a Target There are several possible target objects for `{{action}}` helpers: In a typical Ember application, where views are managed through use of the `{{outlet}}` helper, actions will bubble to the current controller, then to the current route, and then up the route hierarchy. Alternatively, a `target` option can be provided to the helper to change which object will receive the method call. This option must be a path path to an object, accessible in the current context: ```handlebars ``` Clicking "click me" in the rendered HTML of the above template will trigger the `anActionName` method of the object at `MyApplication.someObject`. If an action's target does not implement a method that matches the supplied action name an error will be thrown. ```handlebars ``` With the following application code ```javascript AView = Ember.View.extend({ templateName; 'a-template', // note: no method 'aMethodNameThatIsMissing' anActionName: function(event) {} }); aView = AView.create(); aView.appendTo('body'); ``` Will throw `Uncaught TypeError: Cannot call method 'call' of undefined` when "click me" is clicked. ### Additional Parameters You may specify additional parameters to the `{{action}}` helper. These parameters are passed along as the arguments to the JavaScript function implementing the action. ```handlebars ``` Clicking "click me" will trigger the `edit` method on the current view's controller with the current person as a parameter. @method action @for Ember.Handlebars.helpers @param {String} actionName @param {Object...} contexts @param {Hash} options */ EmberHandlebars.registerHelper('action', function(actionName) { var options = arguments[arguments.length - 1], contexts = a_slice.call(arguments, 1, -1); var hash = options.hash, view = options.data.view, controller, link; // create a hash to pass along to registerAction var action = { eventName: hash.on || "click" }; action.parameters = { context: this, options: options, params: contexts }; action.view = view = get(view, 'concreteView'); var root, target; if (hash.target) { root = this; target = hash.target; } else if (controller = options.data.keywords.controller) { root = controller; } action.target = { root: root, target: target, options: options }; action.bubbles = hash.bubbles; var actionId = ActionHelper.registerAction(actionName, action); return new SafeString('data-ember-action="' + actionId + '"'); }); }); })(); (function() { var get = Ember.get, set = Ember.set; Ember.Handlebars.registerHelper('control', function(path, modelPath, options) { if (arguments.length === 2) { options = modelPath; modelPath = undefined; } var model; if (modelPath) { model = Ember.Handlebars.get(this, modelPath, options); } var controller = options.data.keywords.controller, view = options.data.keywords.view, children = get(controller, '_childContainers'), controlID = options.hash.controlID, container, subContainer; if (children.hasOwnProperty(controlID)) { subContainer = children[controlID]; } else { container = get(controller, 'container'), subContainer = container.child(); children[controlID] = subContainer; } var normalizedPath = path.replace(/\//g, '.'); var childView = subContainer.lookup('view:' + normalizedPath) || subContainer.lookup('view:default'), childController = subContainer.lookup('controller:' + normalizedPath), childTemplate = subContainer.lookup('template:' + path); set(childController, 'target', controller); set(childController, 'model', model); options.hash.template = childTemplate; options.hash.controller = childController; function observer() { var model = Ember.Handlebars.get(this, modelPath, options); set(childController, 'model', model); childView.rerender(); } Ember.addObserver(this, modelPath, observer); childView.one('willDestroyElement', this, function() { Ember.removeObserver(this, modelPath, observer); }); Ember.Handlebars.helpers.view.call(this, childView, options); }); })(); (function() { })(); (function() { /** @module ember @submodule ember-routing */ var get = Ember.get, set = Ember.set; Ember.ControllerMixin.reopen({ transitionToRoute: function() { var target = get(this, 'target'); return target.transitionTo.apply(target, arguments); }, // TODO: Deprecate this, see https://github.com/emberjs/ember.js/issues/1785 transitionTo: function() { return this.transitionToRoute.apply(this, arguments); }, replaceRoute: function() { var target = get(this, 'target'); return target.replaceWith.apply(target, arguments); }, // TODO: Deprecate this, see https://github.com/emberjs/ember.js/issues/1785 replaceWith: function() { return this.replaceRoute.apply(this, arguments); } }); })(); (function() { /** @module ember @submodule ember-routing */ var get = Ember.get, set = Ember.set; Ember.View.reopen({ init: function() { set(this, '_outlets', {}); this._super(); }, connectOutlet: function(outletName, view) { var outlets = get(this, '_outlets'), container = get(this, 'container'), router = container && container.lookup('router:main'), renderedName = get(view, 'renderedName'); set(outlets, outletName, view); if (router && renderedName) { router._connectActiveView(renderedName, view); } }, disconnectOutlet: function(outletName) { var outlets = get(this, '_outlets'); set(outlets, outletName, null); } }); })(); (function() { })(); (function() { /** @module ember @submodule ember-routing */ var get = Ember.get, set = Ember.set; /* This file implements the `location` API used by Ember's router. That API is: getURL: returns the current URL setURL(path): sets the current URL replaceURL(path): replace the current URL (optional) onUpdateURL(callback): triggers the callback when the URL changes formatURL(url): formats `url` to be placed into `href` attribute Calling setURL or replaceURL will not trigger onUpdateURL callbacks. TODO: This should perhaps be moved so that it's visible in the doc output. */ /** Ember.Location returns an instance of the correct implementation of the `location` API. You can pass it a `implementation` ('hash', 'history', 'none') to force a particular implementation. @class Location @namespace Ember @static */ Ember.Location = { create: function(options) { var implementation = options && options.implementation; var implementationClass = this.implementations[implementation]; return implementationClass.create.apply(implementationClass, arguments); }, registerImplementation: function(name, implementation) { this.implementations[name] = implementation; }, implementations: {} }; })(); (function() { /** @module ember @submodule ember-routing */ var get = Ember.get, set = Ember.set; /** Ember.NoneLocation does not interact with the browser. It is useful for testing, or when you need to manage state with your Router, but temporarily don't want it to muck with the URL (for example when you embed your application in a larger page). @class NoneLocation @namespace Ember @extends Ember.Object */ Ember.NoneLocation = Ember.Object.extend({ path: '', getURL: function() { return get(this, 'path'); }, setURL: function(path) { set(this, 'path', path); }, onUpdateURL: function(callback) { // We are not wired up to the browser, so we'll never trigger the callback. }, formatURL: function(url) { // The return value is not overly meaningful, but we do not want to throw // errors when test code renders templates containing {{action href=true}} // helpers. return url; } }); Ember.Location.registerImplementation('none', Ember.NoneLocation); })(); (function() { /** @module ember @submodule ember-routing */ var get = Ember.get, set = Ember.set; /** Ember.HashLocation implements the location API using the browser's hash. At present, it relies on a hashchange event existing in the browser. @class HashLocation @namespace Ember @extends Ember.Object */ Ember.HashLocation = Ember.Object.extend({ init: function() { set(this, 'location', get(this, 'location') || window.location); }, /** @private Returns the current `location.hash`, minus the '#' at the front. @method getURL */ getURL: function() { return get(this, 'location').hash.substr(1); }, /** @private Set the `location.hash` and remembers what was set. This prevents `onUpdateURL` callbacks from triggering when the hash was set by `HashLocation`. @method setURL @param path {String} */ setURL: function(path) { get(this, 'location').hash = path; set(this, 'lastSetURL', path); }, /** @private Register a callback to be invoked when the hash changes. These callbacks will execute when the user presses the back or forward button, but not after `setURL` is invoked. @method onUpdateURL @param callback {Function} */ onUpdateURL: function(callback) { var self = this; var guid = Ember.guidFor(this); Ember.$(window).bind('hashchange.ember-location-'+guid, function() { var path = location.hash.substr(1); if (get(self, 'lastSetURL') === path) { return; } set(self, 'lastSetURL', null); callback(location.hash.substr(1)); }); }, /** @private Given a URL, formats it to be placed into the page as part of an element's `href` attribute. This is used, for example, when using the {{action}} helper to generate a URL based on an event. @method formatURL @param url {String} */ formatURL: function(url) { return '#'+url; }, willDestroy: function() { var guid = Ember.guidFor(this); Ember.$(window).unbind('hashchange.ember-location-'+guid); } }); Ember.Location.registerImplementation('hash', Ember.HashLocation); })(); (function() { /** @module ember @submodule ember-routing */ var get = Ember.get, set = Ember.set; var popstateReady = false; /** Ember.HistoryLocation implements the location API using the browser's history.pushState API. @class HistoryLocation @namespace Ember @extends Ember.Object */ Ember.HistoryLocation = Ember.Object.extend({ init: function() { set(this, 'location', get(this, 'location') || window.location); this.initState(); }, /** @private Used to set state on first call to setURL @method initState */ initState: function() { this.replaceState(this.formatURL(this.getURL())); set(this, 'history', window.history); }, /** Will be pre-pended to path upon state change @property rootURL @default '/' */ rootURL: '/', /** @private Returns the current `location.pathname` without rootURL @method getURL */ getURL: function() { var rootURL = get(this, 'rootURL'), url = get(this, 'location').pathname; rootURL = rootURL.replace(/\/$/, ''); url = url.replace(rootURL, ''); return url; }, /** @private Uses `history.pushState` to update the url without a page reload. @method setURL @param path {String} */ setURL: function(path) { path = this.formatURL(path); if (this.getState() && this.getState().path !== path) { popstateReady = true; this.pushState(path); } }, /** @private Uses `history.replaceState` to update the url without a page reload or history modification. @method replaceURL @param path {String} */ replaceURL: function(path) { path = this.formatURL(path); if (this.getState() && this.getState().path !== path) { popstateReady = true; this.replaceState(path); } }, /** @private Get the current `history.state` @method getState */ getState: function() { return get(this, 'history').state; }, /** @private Pushes a new state @method pushState @param path {String} */ pushState: function(path) { window.history.pushState({ path: path }, null, path); }, /** @private Replaces the current state @method replaceState @param path {String} */ replaceState: function(path) { window.history.replaceState({ path: path }, null, path); }, /** @private Register a callback to be invoked whenever the browser history changes, including using forward and back buttons. @method onUpdateURL @param callback {Function} */ onUpdateURL: function(callback) { var guid = Ember.guidFor(this), self = this; Ember.$(window).bind('popstate.ember-location-'+guid, function(e) { if(!popstateReady) { return; } callback(self.getURL()); }); }, /** @private Used when using `{{action}}` helper. The url is always appended to the rootURL. @method formatURL @param url {String} */ formatURL: function(url) { var rootURL = get(this, 'rootURL'); if (url !== '') { rootURL = rootURL.replace(/\/$/, ''); } return rootURL + url; }, willDestroy: function() { var guid = Ember.guidFor(this); Ember.$(window).unbind('popstate.ember-location-'+guid); } }); Ember.Location.registerImplementation('history', Ember.HistoryLocation); })(); (function() { })(); (function() { /** Ember Routing @module ember @submodule ember-routing @requires ember-states @requires ember-views */ })(); (function() { function visit(vertex, fn, visited, path) { var name = vertex.name, vertices = vertex.incoming, names = vertex.incomingNames, len = names.length, i; if (!visited) { visited = {}; } if (!path) { path = []; } if (visited.hasOwnProperty(name)) { return; } path.push(name); visited[name] = true; for (i = 0; i < len; i++) { visit(vertices[names[i]], fn, visited, path); } fn(vertex, path); path.pop(); } function DAG() { this.names = []; this.vertices = {}; } DAG.prototype.add = function(name) { if (!name) { return; } if (this.vertices.hasOwnProperty(name)) { return this.vertices[name]; } var vertex = { name: name, incoming: {}, incomingNames: [], hasOutgoing: false, value: null }; this.vertices[name] = vertex; this.names.push(name); return vertex; }; DAG.prototype.map = function(name, value) { this.add(name).value = value; }; DAG.prototype.addEdge = function(fromName, toName) { if (!fromName || !toName || fromName === toName) { return; } var from = this.add(fromName), to = this.add(toName); if (to.incoming.hasOwnProperty(fromName)) { return; } function checkCycle(vertex, path) { if (vertex.name === toName) { throw new Error("cycle detected: " + toName + " <- " + path.join(" <- ")); } } visit(from, checkCycle); from.hasOutgoing = true; to.incoming[fromName] = from; to.incomingNames.push(fromName); }; DAG.prototype.topsort = function(fn) { var visited = {}, vertices = this.vertices, names = this.names, len = names.length, i, vertex; for (i = 0; i < len; i++) { vertex = vertices[names[i]]; if (!vertex.hasOutgoing) { visit(vertex, fn, visited); } } }; DAG.prototype.addEdges = function(name, value, before, after) { var i; this.map(name, value); if (before) { if (typeof before === 'string') { this.addEdge(name, before); } else { for (i = 0; i < before.length; i++) { this.addEdge(name, before[i]); } } } if (after) { if (typeof after === 'string') { this.addEdge(after, name); } else { for (i = 0; i < after.length; i++) { this.addEdge(after[i], name); } } } }; Ember.DAG = DAG; })(); (function() { /** @module ember @submodule ember-application */ var get = Ember.get, set = Ember.set, classify = Ember.String.classify, decamelize = Ember.String.decamelize; /** An instance of `Ember.Application` is the starting point for every Ember application. It helps to instantiate, initialize and coordinate the many objects that make up your app. Each Ember app has one and only one `Ember.Application` object. In fact, the very first thing you should do in your application is create the instance: ```javascript window.App = Ember.Application.create(); ``` Typically, the application object is the only global variable. All other classes in your app should be properties on the `Ember.Application` instance, which highlights its first role: a global namespace. For example, if you define a view class, it might look like this: ```javascript App.MyView = Ember.View.extend(); ``` By default, calling `Ember.Application.create()` will automatically initialize your application by calling the `Ember.Application.initialize()` method. If you need to delay initialization, you can call your app's `deferReadiness()` method. When you are ready for your app to be initialized, call its `advanceReadiness()` method. Because `Ember.Application` inherits from `Ember.Namespace`, any classes you create will have useful string representations when calling `toString()`. See the `Ember.Namespace` documentation for more information. While you can think of your `Ember.Application` as a container that holds the other classes in your application, there are several other responsibilities going on under-the-hood that you may want to understand. ### Event Delegation Ember uses a technique called _event delegation_. This allows the framework to set up a global, shared event listener instead of requiring each view to do it manually. For example, instead of each view registering its own `mousedown` listener on its associated element, Ember sets up a `mousedown` listener on the `body`. If a `mousedown` event occurs, Ember will look at the target of the event and start walking up the DOM node tree, finding corresponding views and invoking their `mouseDown` method as it goes. `Ember.Application` has a number of default events that it listens for, as well as a mapping from lowercase events to camel-cased view method names. For example, the `keypress` event causes the `keyPress` method on the view to be called, the `dblclick` event causes `doubleClick` to be called, and so on. If there is a browser event that Ember does not listen for by default, you can specify custom events and their corresponding view method names by setting the application's `customEvents` property: ```javascript App = Ember.Application.create({ customEvents: { // add support for the loadedmetadata media // player event 'loadedmetadata': "loadedMetadata" } }); ``` By default, the application sets up these event listeners on the document body. However, in cases where you are embedding an Ember application inside an existing page, you may want it to set up the listeners on an element inside the body. For example, if only events inside a DOM element with the ID of `ember-app` should be delegated, set your application's `rootElement` property: ```javascript window.App = Ember.Application.create({ rootElement: '#ember-app' }); ``` The `rootElement` can be either a DOM element or a jQuery-compatible selector string. Note that *views appended to the DOM outside the root element will not receive events.* If you specify a custom root element, make sure you only append views inside it! To learn more about the advantages of event delegation and the Ember view layer, and a list of the event listeners that are setup by default, visit the [Ember View Layer guide](http://emberjs.com/guides/view_layer#toc_event-delegation). ### Initializers Libraries on top of Ember can register additional initializers, like so: ```javascript Ember.Application.initializer({ name: "store", initialize: function(container, application) { container.register('store', 'main', application.Store); } }); ``` ### Routing In addition to creating your application's router, `Ember.Application` is also responsible for telling the router when to start routing. By default, the router will begin trying to translate the current URL into application state once the browser emits the `DOMContentReady` event. If you need to defer routing, you can call the application's `deferReadiness()` method. Once routing can begin, call the `advanceReadiness()` method. If there is any setup required before routing begins, you can implement a `ready()` method on your app that will be invoked immediately before routing begins: ```javascript window.App = Ember.Application.create({ ready: function() { this.set('router.enableLogging', true); } }); To begin routing, you must have at a minimum a top-level controller and view. You define these as `App.ApplicationController` and `App.ApplicationView`, respectively. Your application will not work if you do not define these two mandatory classes. For example: ```javascript App.ApplicationView = Ember.View.extend({ templateName: 'application' }); App.ApplicationController = Ember.Controller.extend(); ``` @class Application @namespace Ember @extends Ember.Namespace */ var Application = Ember.Application = Ember.Namespace.extend( /** @scope Ember.Application.prototype */{ /** The root DOM element of the Application. This can be specified as an element or a [jQuery-compatible selector string](http://api.jquery.com/category/selectors/). This is the element that will be passed to the Application's, `eventDispatcher`, which sets up the listeners for event delegation. Every view in your application should be a child of the element you specify here. @property rootElement @type DOMElement @default 'body' */ rootElement: 'body', /** The `Ember.EventDispatcher` responsible for delegating events to this application's views. The event dispatcher is created by the application at initialization time and sets up event listeners on the DOM element described by the application's `rootElement` property. See the documentation for `Ember.EventDispatcher` for more information. @property eventDispatcher @type Ember.EventDispatcher @default null */ eventDispatcher: null, /** The DOM events for which the event dispatcher should listen. By default, the application's `Ember.EventDispatcher` listens for a set of standard DOM events, such as `mousedown` and `keyup`, and delegates them to your application's `Ember.View` instances. If you would like additional events to be delegated to your views, set your `Ember.Application`'s `customEvents` property to a hash containing the DOM event name as the key and the corresponding view method name as the value. For example: ```javascript App = Ember.Application.create({ customEvents: { // add support for the loadedmetadata media // player event 'loadedmetadata': "loadedMetadata" } }); ``` @property customEvents @type Object @default null */ customEvents: null, isInitialized: false, // Start off the number of deferrals at 1. This will be // decremented by the Application's own `initialize` method. _readinessDeferrals: 1, init: function() { if (!this.$) { this.$ = Ember.$; } this.__container__ = this.buildContainer(); this.Router = this.Router || this.defaultRouter(); if (this.Router) { this.Router.namespace = this; } this._super(); this.deferUntilDOMReady(); this.scheduleInitialize(); }, /** @private Build the container for the current application. Also register a default application view in case the application itself does not. @method buildContainer @return {Ember.Container} the configured container */ buildContainer: function() { var container = this.__container__ = Application.buildContainer(this); return container; }, /** @private If the application has not opted out of routing and has not explicitly defined a router, supply a default router for the application author to configure. This allows application developers to do: ```javascript App = Ember.Application.create(); App.Router.map(function(match) { match("/").to("index"); }); ``` @method defaultRouter @return {Ember.Router} the default router */ defaultRouter: function() { // Create a default App.Router if one was not supplied to make // it possible to do App.Router.map(...) without explicitly // creating a router first. if (this.router === undefined) { return Ember.Router.extend(); } }, /** @private Defer Ember readiness until DOM readiness. By default, Ember will wait for both DOM readiness and application initialization, as well as any deferrals registered by initializers. @method deferUntilDOMReady */ deferUntilDOMReady: function() { this.deferReadiness(); var self = this; this.$().ready(function() { self.advanceReadiness(); }); }, /** @private Automatically initialize the application once the DOM has become ready. The initialization itself is deferred using Ember.run.once, which ensures that application loading finishes before booting. If you are asynchronously loading code, you should call `deferReadiness()` to defer booting, and then call `advanceReadiness()` once all of your code has finished loading. @method scheduleInitialize */ scheduleInitialize: function() { var self = this; this.$().ready(function() { if (self.isDestroyed || self.isInitialized) return; Ember.run.once(self, 'initialize'); }); }, /** Use this to defer readiness until some condition is true. Example: ```javascript App = Ember.Application.create(); App.deferReadiness(); jQuery.getJSON("/auth-token", function(token) { App.token = token; App.advanceReadiness(); }); ``` This allows you to perform asynchronous setup logic and defer booting your application until the setup has finished. However, if the setup requires a loading UI, it might be better to use the router for this purpose. @method deferReadiness */ deferReadiness: function() { this._readinessDeferrals++; }, /** @method advanceReadiness @see {Ember.Application#deferReadiness} */ advanceReadiness: function() { this._readinessDeferrals--; if (this._readinessDeferrals === 0) { Ember.run.once(this, this.didBecomeReady); } }, /** registers a factory for later injection Example: ```javascript App = Ember.Application.create(); App.Person = Ember.Object.extend({}); App.Orange = Ember.Object.extend({}); App.Email = Ember.Object.extend({}); App.register('model:user', App.Person, {singleton: false }); App.register('fruit:favorite', App.Orange); App.register('communication:main', App.Email, {singleton: false}); ``` @method register @param type {String} @param name {String} @param factory {String} @param options {String} (optional) **/ register: function() { var container = this.__container__; container.register.apply(container, arguments); }, /** defines an injection or typeInjection Example: ```javascript App.inject(, , ) App.inject('model:user', 'email', 'model:email') App.inject('model', 'source', 'source:main') ``` @method inject @param factoryNameOrType {String} @param property {String} @param injectionName {String} **/ inject: function(){ var container = this.__container__; container.injection.apply(container, arguments); }, /** @private Initialize the application. This happens automatically. Run any initializers and run the application load hook. These hooks may choose to defer readiness. For example, an authentication hook might want to defer readiness until the auth token has been retrieved. @method initialize */ initialize: function() { this.isInitialized = true; // At this point, the App.Router must already be assigned this.__container__.register('router', 'main', this.Router); this.runInitializers(); Ember.runLoadHooks('application', this); // At this point, any initializers or load hooks that would have wanted // to defer readiness have fired. In general, advancing readiness here // will proceed to didBecomeReady. this.advanceReadiness(); return this; }, /** @private @method runInitializers */ runInitializers: function() { var initializers = get(this.constructor, 'initializers'), container = this.__container__, graph = new Ember.DAG(), namespace = this, properties, i, initializer; for (i=0; i` state will be added to the list of enter and exit // states because its context has changed. while (contexts.length > 0) { if (stateIdx >= 0) { state = this.enterStates[stateIdx--]; } else { if (this.enterStates.length) { state = get(this.enterStates[0], 'parentState'); if (!state) { throw "Cannot match all contexts to states"; } } else { // If re-entering the current state with a context, the resolve // state will be the current state. state = this.resolveState; } this.enterStates.unshift(state); this.exitStates.unshift(state); } // in routers, only states with dynamic segments have a context if (get(state, 'hasContext')) { context = contexts.pop(); } else { context = null; } matchedContexts.unshift(context); } this.contexts = matchedContexts; }, /** Add any `initialState`s to the list of enter states. @method addInitialStates */ addInitialStates: function() { var finalState = this.finalState, initialState; while(true) { initialState = get(finalState, 'initialState') || 'start'; finalState = get(finalState, 'states.' + initialState); if (!finalState) { break; } this.finalState = finalState; this.enterStates.push(finalState); this.contexts.push(undefined); } }, /** Remove any states that were added because the number of contexts exceeded the number of explicit enter states, but the context has not changed since the last time the state was entered. @method removeUnchangedContexts @param {Ember.StateManager} manager passed in to look up the last context for a states */ removeUnchangedContexts: function(manager) { // Start from the beginning of the enter states. If the state was added // to the list during the context matching phase, make sure the context // has actually changed since the last time the state was entered. while (this.enterStates.length > 0) { if (this.enterStates[0] !== this.exitStates[0]) { break; } if (this.enterStates.length === this.contexts.length) { if (manager.getStateMeta(this.enterStates[0], 'context') !== this.contexts[0]) { break; } this.contexts.shift(); } this.resolveState = this.enterStates.shift(); this.exitStates.shift(); } } }; var sendRecursively = function(event, currentState, isUnhandledPass) { var log = this.enableLogging, eventName = isUnhandledPass ? 'unhandledEvent' : event, action = currentState[eventName], contexts, sendRecursiveArguments, actionArguments; contexts = [].slice.call(arguments, 3); // Test to see if the action is a method that // can be invoked. Don't blindly check just for // existence, because it is possible the state // manager has a child state of the given name, // and we should still raise an exception in that // case. if (typeof action === 'function') { if (log) { if (isUnhandledPass) { Ember.Logger.log(fmt("STATEMANAGER: Unhandled event '%@' being sent to state %@.", [event, get(currentState, 'path')])); } else { Ember.Logger.log(fmt("STATEMANAGER: Sending event '%@' to state %@.", [event, get(currentState, 'path')])); } } actionArguments = contexts; if (isUnhandledPass) { actionArguments.unshift(event); } actionArguments.unshift(this); return action.apply(currentState, actionArguments); } else { var parentState = get(currentState, 'parentState'); if (parentState) { sendRecursiveArguments = contexts; sendRecursiveArguments.unshift(event, parentState, isUnhandledPass); return sendRecursively.apply(this, sendRecursiveArguments); } else if (!isUnhandledPass) { return sendEvent.call(this, event, contexts, true); } } }; var sendEvent = function(eventName, sendRecursiveArguments, isUnhandledPass) { sendRecursiveArguments.unshift(eventName, get(this, 'currentState'), isUnhandledPass); return sendRecursively.apply(this, sendRecursiveArguments); }; /** StateManager is part of Ember's implementation of a finite state machine. A StateManager instance manages a number of properties that are instances of `Ember.State`, tracks the current active state, and triggers callbacks when states have changed. ## Defining States The states of StateManager can be declared in one of two ways. First, you can define a `states` property that contains all the states: ```javascript managerA = Ember.StateManager.create({ states: { stateOne: Ember.State.create(), stateTwo: Ember.State.create() } }) managerA.get('states') // { // stateOne: Ember.State.create(), // stateTwo: Ember.State.create() // } ``` You can also add instances of `Ember.State` (or an `Ember.State` subclass) directly as properties of a StateManager. These states will be collected into the `states` property for you. ```javascript managerA = Ember.StateManager.create({ stateOne: Ember.State.create(), stateTwo: Ember.State.create() }) managerA.get('states') // { // stateOne: Ember.State.create(), // stateTwo: Ember.State.create() // } ``` ## The Initial State When created a StateManager instance will immediately enter into the state defined as its `start` property or the state referenced by name in its `initialState` property: ```javascript managerA = Ember.StateManager.create({ start: Ember.State.create({}) }) managerA.get('currentState.name') // 'start' managerB = Ember.StateManager.create({ initialState: 'beginHere', beginHere: Ember.State.create({}) }) managerB.get('currentState.name') // 'beginHere' ``` Because it is a property you may also provide a computed function if you wish to derive an `initialState` programmatically: ```javascript managerC = Ember.StateManager.create({ initialState: function(){ if (someLogic) { return 'active'; } else { return 'passive'; } }.property(), active: Ember.State.create({}), passive: Ember.State.create({}) }) ``` ## Moving Between States A StateManager can have any number of `Ember.State` objects as properties and can have a single one of these states as its current state. Calling `transitionTo` transitions between states: ```javascript robotManager = Ember.StateManager.create({ initialState: 'poweredDown', poweredDown: Ember.State.create({}), poweredUp: Ember.State.create({}) }) robotManager.get('currentState.name') // 'poweredDown' robotManager.transitionTo('poweredUp') robotManager.get('currentState.name') // 'poweredUp' ``` Before transitioning into a new state the existing `currentState` will have its `exit` method called with the StateManager instance as its first argument and an object representing the transition as its second argument. After transitioning into a new state the new `currentState` will have its `enter` method called with the StateManager instance as its first argument and an object representing the transition as its second argument. ```javascript robotManager = Ember.StateManager.create({ initialState: 'poweredDown', poweredDown: Ember.State.create({ exit: function(stateManager){ console.log("exiting the poweredDown state") } }), poweredUp: Ember.State.create({ enter: function(stateManager){ console.log("entering the poweredUp state. Destroy all humans.") } }) }) robotManager.get('currentState.name') // 'poweredDown' robotManager.transitionTo('poweredUp') // will log // 'exiting the poweredDown state' // 'entering the poweredUp state. Destroy all humans.' ``` Once a StateManager is already in a state, subsequent attempts to enter that state will not trigger enter or exit method calls. Attempts to transition into a state that the manager does not have will result in no changes in the StateManager's current state: ```javascript robotManager = Ember.StateManager.create({ initialState: 'poweredDown', poweredDown: Ember.State.create({ exit: function(stateManager){ console.log("exiting the poweredDown state") } }), poweredUp: Ember.State.create({ enter: function(stateManager){ console.log("entering the poweredUp state. Destroy all humans.") } }) }) robotManager.get('currentState.name') // 'poweredDown' robotManager.transitionTo('poweredUp') // will log // 'exiting the poweredDown state' // 'entering the poweredUp state. Destroy all humans.' robotManager.transitionTo('poweredUp') // no logging, no state change robotManager.transitionTo('someUnknownState') // silently fails robotManager.get('currentState.name') // 'poweredUp' ``` Each state property may itself contain properties that are instances of `Ember.State`. The StateManager can transition to specific sub-states in a series of transitionTo method calls or via a single transitionTo with the full path to the specific state. The StateManager will also keep track of the full path to its currentState ```javascript robotManager = Ember.StateManager.create({ initialState: 'poweredDown', poweredDown: Ember.State.create({ charging: Ember.State.create(), charged: Ember.State.create() }), poweredUp: Ember.State.create({ mobile: Ember.State.create(), stationary: Ember.State.create() }) }) robotManager.get('currentState.name') // 'poweredDown' robotManager.transitionTo('poweredUp') robotManager.get('currentState.name') // 'poweredUp' robotManager.transitionTo('mobile') robotManager.get('currentState.name') // 'mobile' // transition via a state path robotManager.transitionTo('poweredDown.charging') robotManager.get('currentState.name') // 'charging' robotManager.get('currentState.path') // 'poweredDown.charging' ``` Enter transition methods will be called for each state and nested child state in their hierarchical order. Exit methods will be called for each state and its nested states in reverse hierarchical order. Exit transitions for a parent state are not called when entering into one of its child states, only when transitioning to a new section of possible states in the hierarchy. ```javascript robotManager = Ember.StateManager.create({ initialState: 'poweredDown', poweredDown: Ember.State.create({ enter: function(){}, exit: function(){ console.log("exited poweredDown state") }, charging: Ember.State.create({ enter: function(){}, exit: function(){} }), charged: Ember.State.create({ enter: function(){ console.log("entered charged state") }, exit: function(){ console.log("exited charged state") } }) }), poweredUp: Ember.State.create({ enter: function(){ console.log("entered poweredUp state") }, exit: function(){}, mobile: Ember.State.create({ enter: function(){ console.log("entered mobile state") }, exit: function(){} }), stationary: Ember.State.create({ enter: function(){}, exit: function(){} }) }) }) robotManager.get('currentState.path') // 'poweredDown' robotManager.transitionTo('charged') // logs 'entered charged state' // but does *not* log 'exited poweredDown state' robotManager.get('currentState.name') // 'charged robotManager.transitionTo('poweredUp.mobile') // logs // 'exited charged state' // 'exited poweredDown state' // 'entered poweredUp state' // 'entered mobile state' ``` During development you can set a StateManager's `enableLogging` property to `true` to receive console messages of state transitions. ```javascript robotManager = Ember.StateManager.create({ enableLogging: true }) ``` ## Managing currentState with Actions To control which transitions are possible for a given state, and appropriately handle external events, the StateManager can receive and route action messages to its states via the `send` method. Calling to `send` with an action name will begin searching for a method with the same name starting at the current state and moving up through the parent states in a state hierarchy until an appropriate method is found or the StateManager instance itself is reached. If an appropriately named method is found it will be called with the state manager as the first argument and an optional `context` object as the second argument. ```javascript managerA = Ember.StateManager.create({ initialState: 'stateOne.substateOne.subsubstateOne', stateOne: Ember.State.create({ substateOne: Ember.State.create({ anAction: function(manager, context){ console.log("an action was called") }, subsubstateOne: Ember.State.create({}) }) }) }) managerA.get('currentState.name') // 'subsubstateOne' managerA.send('anAction') // 'stateOne.substateOne.subsubstateOne' has no anAction method // so the 'anAction' method of 'stateOne.substateOne' is called // and logs "an action was called" // with managerA as the first argument // and no second argument someObject = {} managerA.send('anAction', someObject) // the 'anAction' method of 'stateOne.substateOne' is called again // with managerA as the first argument and // someObject as the second argument. ``` If the StateManager attempts to send an action but does not find an appropriately named method in the current state or while moving upwards through the state hierarchy, it will repeat the process looking for a `unhandledEvent` method. If an `unhandledEvent` method is found, it will be called with the original event name as the second argument. If an `unhandledEvent` method is not found, the StateManager will throw a new Ember.Error. ```javascript managerB = Ember.StateManager.create({ initialState: 'stateOne.substateOne.subsubstateOne', stateOne: Ember.State.create({ substateOne: Ember.State.create({ subsubstateOne: Ember.State.create({}), unhandledEvent: function(manager, eventName, context) { console.log("got an unhandledEvent with name " + eventName); } }) }) }) managerB.get('currentState.name') // 'subsubstateOne' managerB.send('anAction') // neither `stateOne.substateOne.subsubstateOne` nor any of it's // parent states have a handler for `anAction`. `subsubstateOne` // also does not have a `unhandledEvent` method, but its parent // state, `substateOne`, does, and it gets fired. It will log // "got an unhandledEvent with name anAction" ``` Action detection only moves upwards through the state hierarchy from the current state. It does not search in other portions of the hierarchy. ```javascript managerC = Ember.StateManager.create({ initialState: 'stateOne.substateOne.subsubstateOne', stateOne: Ember.State.create({ substateOne: Ember.State.create({ subsubstateOne: Ember.State.create({}) }) }), stateTwo: Ember.State.create({ anAction: function(manager, context){ // will not be called below because it is // not a parent of the current state } }) }) managerC.get('currentState.name') // 'subsubstateOne' managerC.send('anAction') // Error: could not // respond to event anAction in state stateOne.substateOne.subsubstateOne. ``` Inside of an action method the given state should delegate `transitionTo` calls on its StateManager. ```javascript robotManager = Ember.StateManager.create({ initialState: 'poweredDown.charging', poweredDown: Ember.State.create({ charging: Ember.State.create({ chargeComplete: function(manager, context){ manager.transitionTo('charged') } }), charged: Ember.State.create({ boot: function(manager, context){ manager.transitionTo('poweredUp') } }) }), poweredUp: Ember.State.create({ beginExtermination: function(manager, context){ manager.transitionTo('rampaging') }, rampaging: Ember.State.create() }) }) robotManager.get('currentState.name') // 'charging' robotManager.send('boot') // throws error, no boot action // in current hierarchy robotManager.get('currentState.name') // remains 'charging' robotManager.send('beginExtermination') // throws error, no beginExtermination // action in current hierarchy robotManager.get('currentState.name') // remains 'charging' robotManager.send('chargeComplete') robotManager.get('currentState.name') // 'charged' robotManager.send('boot') robotManager.get('currentState.name') // 'poweredUp' robotManager.send('beginExtermination', allHumans) robotManager.get('currentState.name') // 'rampaging' ``` Transition actions can also be created using the `transitionTo` method of the `Ember.State` class. The following example StateManagers are equivalent: ```javascript aManager = Ember.StateManager.create({ stateOne: Ember.State.create({ changeToStateTwo: Ember.State.transitionTo('stateTwo') }), stateTwo: Ember.State.create({}) }) bManager = Ember.StateManager.create({ stateOne: Ember.State.create({ changeToStateTwo: function(manager, context){ manager.transitionTo('stateTwo', context) } }), stateTwo: Ember.State.create({}) }) ``` @class StateManager @namespace Ember @extends Ember.State **/ Ember.StateManager = Ember.State.extend({ /** @private When creating a new statemanager, look for a default state to transition into. This state can either be named `start`, or can be specified using the `initialState` property. @method init */ init: function() { this._super(); set(this, 'stateMeta', Ember.Map.create()); var initialState = get(this, 'initialState'); if (!initialState && get(this, 'states.start')) { initialState = 'start'; } if (initialState) { this.transitionTo(initialState); } }, stateMetaFor: function(state) { var meta = get(this, 'stateMeta'), stateMeta = meta.get(state); if (!stateMeta) { stateMeta = {}; meta.set(state, stateMeta); } return stateMeta; }, setStateMeta: function(state, key, value) { return set(this.stateMetaFor(state), key, value); }, getStateMeta: function(state, key) { return get(this.stateMetaFor(state), key); }, /** The current state from among the manager's possible states. This property should not be set directly. Use `transitionTo` to move between states by name. @property currentState @type Ember.State */ currentState: null, /** The path of the current state. Returns a string representation of the current state. @property currentPath @type String */ currentPath: Ember.computed.alias('currentState.path'), /** The name of transitionEvent that this stateManager will dispatch @property transitionEvent @type String @default 'setup' */ transitionEvent: 'setup', /** If set to true, `errorOnUnhandledEvents` will cause an exception to be raised if you attempt to send an event to a state manager that is not handled by the current state or any of its parent states. @property errorOnUnhandledEvents @type Boolean @default true */ errorOnUnhandledEvent: true, send: function(event) { var contexts = [].slice.call(arguments, 1); return sendEvent.call(this, event, contexts, false); }, unhandledEvent: function(manager, event) { if (get(this, 'errorOnUnhandledEvent')) { throw new Ember.Error(this.toString() + " could not respond to event " + event + " in state " + get(this, 'currentState.path') + "."); } }, /** Finds a state by its state path. Example: ```javascript manager = Ember.StateManager.create({ root: Ember.State.create({ dashboard: Ember.State.create() }) }); manager.getStateByPath(manager, "root.dashboard") // returns the dashboard state ``` @method getStateByPath @param {Ember.State} root the state to start searching from @param {String} path the state path to follow @return {Ember.State} the state at the end of the path */ getStateByPath: function(root, path) { var parts = path.split('.'), state = root; for (var i=0, len=parts.length; i`, an attempt to // transition to `comments.show` will match ``. // // First, this code will look for root.posts.show.comments.show. // Next, it will look for root.posts.comments.show. Finally, // it will look for `root.comments.show`, and find the state. // // After this process, the following variables will exist: // // * resolveState: a common parent state between the current // and target state. In the above example, `` is the // `resolveState`. // * enterStates: a list of all of the states represented // by the path from the `resolveState`. For example, for // the path `root.comments.show`, `enterStates` would have // `[, ]` // * exitStates: a list of all of the states from the // `resolveState` to the `currentState`. In the above // example, `exitStates` would have // `[`, `]`. while (resolveState && !enterStates) { exitStates.unshift(resolveState); resolveState = get(resolveState, 'parentState'); if (!resolveState) { enterStates = this.getStatesInPath(this, path); if (!enterStates) { return; } } enterStates = this.getStatesInPath(resolveState, path); } // If the path contains some states that are parents of both the // current state and the target state, remove them. // // For example, in the following hierarchy: // // |- root // | |- post // | | |- index (* current) // | | |- show // // If the `path` is `root.post.show`, the three variables will // be: // // * resolveState: `` // * enterStates: `[, , ]` // * exitStates: `[, , ]` // // The goal of this code is to remove the common states, so we // have: // // * resolveState: `` // * enterStates: `[]` // * exitStates: `[]` // // This avoid unnecessary calls to the enter and exit transitions. while (enterStates.length > 0 && enterStates[0] === exitStates[0]) { resolveState = enterStates.shift(); exitStates.shift(); } // Cache the enterStates, exitStates, and resolveState for the // current state and the `path`. var transitions = currentState.pathsCache[path] = { exitStates: exitStates, enterStates: enterStates, resolveState: resolveState }; return transitions; }, triggerSetupContext: function(transitions) { var contexts = transitions.contexts, offset = transitions.enterStates.length - contexts.length, enterStates = transitions.enterStates, transitionEvent = get(this, 'transitionEvent'); arrayForEach.call(enterStates, function(state, idx) { state.trigger(transitionEvent, this, contexts[idx-offset]); }, this); }, getState: function(name) { var state = get(this, name), parentState = get(this, 'parentState'); if (state) { return state; } else if (parentState) { return parentState.getState(name); } }, enterState: function(transition) { var log = this.enableLogging; var exitStates = transition.exitStates.slice(0).reverse(); arrayForEach.call(exitStates, function(state) { state.trigger('exit', this); }, this); arrayForEach.call(transition.enterStates, function(state) { if (log) { Ember.Logger.log("STATEMANAGER: Entering " + get(state, 'path')); } state.trigger('enter', this); }, this); set(this, 'currentState', transition.finalState); } }); })(); (function() { /** Ember States @module ember @submodule ember-states @requires ember-runtime */ })(); })(); if (typeof location !== 'undefined' && (location.hostname === 'localhost' || location.hostname === '127.0.0.1')) { console.warn("You are running a production build of Ember on localhost and won't receive detailed error messages. "+ "If you want full error messages please use the non-minified build provided on the Ember website."); }