345 lines
11 KiB
JavaScript
345 lines
11 KiB
JavaScript
/**
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* @class YAHOO.ext.util.MixedCollection
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* A Collection class that maintains both numeric indexes and keys and exposes events.<br>
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* @constructor
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* @param {Boolean} allowFunctions True if the addAll function should add function references
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* to the collection.
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*/
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YAHOO.ext.util.MixedCollection = function(allowFunctions){
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this.items = [];
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this.keys = [];
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this.events = {
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/**
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* @event clear
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* Fires when the collection is cleared.
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*/
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'clear' : new YAHOO.util.CustomEvent('clear'),
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/**
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* @event add
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* Fires when an item is added to the collection.
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* @param {Number} index The index at which the item was added.
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* @param {Object} o The item added.
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* @param {String} key The key associated with the added item.
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*/
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'add' : new YAHOO.util.CustomEvent('add'),
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/**
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* @event replace
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* Fires when an item is replaced in the collection.
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* @param {String} key he key associated with the new added.
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* @param {Object} old The item being replaced.
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* @param {Object} new The new item.
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*/
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'replace' : new YAHOO.util.CustomEvent('replace'),
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/**
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* @event remove
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* Fires when an item is removed from the collection.
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* @param {Object} o The item being removed.
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* @param {String} key (optional) The key associated with the removed item.
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*/
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'remove' : new YAHOO.util.CustomEvent('remove')
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}
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this.allowFunctions = allowFunctions === true;
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};
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YAHOO.extendX(YAHOO.ext.util.MixedCollection, YAHOO.ext.util.Observable, {
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allowFunctions : false,
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/**
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* Adds an item to the collection.
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* @param {String} key The key to associate with the item
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* @param {Object} o The item to add.
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* @return {Object} The item added.
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*/
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add : function(key, o){
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if(arguments.length == 1){
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o = arguments[0];
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key = this.getKey(o);
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}
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this.items.push(o);
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if(typeof key != 'undefined' && key != null){
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this.items[key] = o;
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this.keys.push(key);
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}
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this.fireEvent('add', this.items.length-1, o, key);
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return o;
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},
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/**
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* MixedCollection has a generic way to fetch keys if you implement getKey.
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<pre><code>
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// normal way
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var mc = new YAHOO.ext.util.MixedCollection();
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mc.add(someEl.dom.id, someEl);
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mc.add(otherEl.dom.id, otherEl);
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//and so on
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// using getKey
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var mc = new YAHOO.ext.util.MixedCollection();
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mc.getKey = function(el){
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return el.dom.id;
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}
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mc.add(someEl);
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mc.add(otherEl);
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// etc
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</code>
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* @param o {Object} The item for which to find the key.
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* @return {Object} The key for the passed item.
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*/
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getKey : function(o){
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return null;
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},
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/**
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* Replaces an item in the collection.
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* @param {String} key The key associated with the item to replace, or the item to replace.
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* @param o {Object} o (optional) If the first parameter passed was a key, the item to associate with that key.
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* @return {Object} The new item.
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*/
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replace : function(key, o){
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if(arguments.length == 1){
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o = arguments[0];
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key = this.getKey(o);
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}
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if(typeof this.items[key] == 'undefined'){
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return this.add(key, o);
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}
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var old = this.items[key];
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if(typeof key == 'number'){ // array index key
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this.items[key] = o;
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}else{
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var index = this.indexOfKey(key);
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this.items[index] = o;
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this.items[key] = o;
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}
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this.fireEvent('replace', key, old, o);
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return o;
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},
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/**
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* Adds all elements of an Array or an Object to the collection.
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* @param {Object/Array} objs An Object containing properties which will be added to the collection, or
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* an Array of values, each of which are added to the collection.
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*/
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addAll : function(objs){
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if(arguments.length > 1 || objs instanceof Array){
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var args = arguments.length > 1 ? arguments : objs;
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for(var i = 0, len = args.length; i < len; i++){
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this.add(args[i]);
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}
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}else{
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for(var key in objs){
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if(this.allowFunctions || typeof objs[key] != 'function'){
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this.add(objs[key], key);
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}
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}
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}
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},
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/**
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* Executes the specified function once for every item in the collection, passing each
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* item as the first and only parameter.
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* @param {Function} fn The function to execute for each item.
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* @param {Object} scope (optional) The scope in which to execute the function.
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*/
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each : function(fn, scope){
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for(var i = 0, len = this.items.length; i < len; i++){
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fn.call(scope || window, this.items[i]);
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}
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},
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/**
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* Executes the specified function once for every key in the collection, passing each
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* key, and its associated item as the first two parameters.
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* @param {Function} fn The function to execute for each item.
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* @param {Object} scope (optional) The scope in which to execute the function.
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*/
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eachKey : function(fn, scope){
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for(var i = 0, len = this.keys.length; i < len; i++){
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fn.call(scope || window, this.keys[i], this.items[i]);
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}
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},
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/**
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* Returns the first item in the collection which elicits a true return value from the
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* passed selection function.
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* @param {Function} fn The selection function to execute for each item.
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* @param {Object} scope (optional) The scope in which to execute the function.
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* @return {Object} The first item in the collection which returned true from the selection function.
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*/
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find : function(fn, scope){
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for(var i = 0, len = this.items.length; i < len; i++){
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if(fn.call(scope || window, this.items[i])){
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return this.items[i];
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}
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}
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return null;
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},
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/**
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* Inserts an item at the specified index in the collection.
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* @param {Number} index The index to insert the item at.
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* @param {String} key The key to associate with the new item, or the item itself.
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* @param {Object} o (optional) If the second parameter was a key, the new item.
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* @return {Object} The item inserted.
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*/
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insert : function(index, key, o){
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if(arguments.length == 2){
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o = arguments[1];
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key = this.getKey(o);
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}
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if(index >= this.items.length){
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return this.add(o, key);
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}
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this.items.splice(index, 0, o);
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if(typeof key != 'undefined' && key != null){
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this.items[key] = o;
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this.keys.splice(index, 0, key);
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}
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this.fireEvent('add', index, o, key);
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return o;
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},
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/**
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* Removed an item from the collection.
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* @param {Object} o The item to remove.
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* @return {Object} The item removed.
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*/
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remove : function(o){
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var index = this.indexOf(o);
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this.items.splice(index, 1);
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if(typeof this.keys[index] != 'undefined'){
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var key = this.keys[index];
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this.keys.splice(index, 1);
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delete this.items[key];
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}
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this.fireEvent('remove', o);
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return o;
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},
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/**
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* Remove an item from a specified index in the collection.
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* @param {Number} index The index within the collection of the item to remove.
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*/
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removeAt : function(index){
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this.items.splice(index, 1);
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var key = this.keys[index];
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if(typeof key != 'undefined'){
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this.keys.splice(index, 1);
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delete this.items[key];
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}
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this.fireEvent('remove', o, key);
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},
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/**
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* Removed an item associated with the passed key fom the collection.
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* @param {String} key The key of the item to remove.
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*/
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removeKey : function(key){
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var o = this.items[key];
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var index = this.indexOf(o);
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this.items.splice(index, 1);
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this.keys.splice(index, 1);
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delete this.items[key];
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this.fireEvent('remove', o, key);
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},
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/**
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* Returns the number of items in the collection.
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* @return {Number} the number of items in the collection.
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*/
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getCount : function(){
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return this.items.length;
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},
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/**
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* Returns index within the collection of the passed Object.
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* @param {Object} o The item to find the index of.
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* @return {Number} index of the item.
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*/
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indexOf : function(o){
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if(!this.items.indexOf){
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for(var i = 0, len = this.items.length; i < len; i++){
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if(this.items[i] == o) return i;
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}
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return -1;
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}else{
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return this.items.indexOf(o);
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}
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},
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/**
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* Returns index within the collection of the passed key.
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* @param {String} key The key to find the index of.
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* @return {Number} index of the key.
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*/
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indexOfKey : function(key){
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if(!this.keys.indexOf){
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for(var i = 0, len = this.keys.length; i < len; i++){
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if(this.keys[i] == key) return i;
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}
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return -1;
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}else{
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return this.keys.indexOf(key);
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}
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},
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/**
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* Returns the item associated with the passed key.
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* @param {String/Number} key The key or index of the item.
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* @return {Object} The item associated with the passed key.
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*/
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item : function(key){
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return this.items[key];
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},
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/**
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* Returns true if the collection contains the passed Object as an item.
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* @param {Object} o The Object to look for in the collection.
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* @return {Boolean} True if the collection contains the Object as an item.
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*/
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contains : function(o){
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return this.indexOf(o) != -1;
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},
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/**
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* Returns true if the collection contains the passed Object as a key.
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* @param {String} key The key to look for in the collection.
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* @return {Boolean} True if the collection contains the Object as a key.
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*/
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containsKey : function(key){
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return typeof this.items[key] != 'undefined';
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},
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/**
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* Removes all items from the collection.
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*/
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clear : function(o){
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this.items = [];
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this.keys = [];
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this.fireEvent('clear');
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},
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/**
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* Returns the first item in the collection.
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* @return {Object} the first item in the collection..
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*/
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first : function(){
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return this.items[0];
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},
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/**
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* Returns the last item in the collection.
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* @return {Object} the last item in the collection..
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*/
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last : function(){
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return this.items[this.items.length];
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}
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});
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/**
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* Returns the item associated with the passed key or index.
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* @method
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* @param {String/Number} key The key or index of the item.
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* @return {Object} The item associated with the passed key.
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*/
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YAHOO.ext.util.MixedCollection.prototype.get = YAHOO.ext.util.MixedCollection.prototype.item;
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