4 * Copyright(c) 2006-2007, Ext JS, LLC.
6 * Originally Released Under LGPL - original licence link has changed is not relivant.
9 * <script type="text/javascript">
14 * @class Roo.util.MixedCollection
15 * @extends Roo.util.Observable
16 * A Collection class that maintains both numeric indexes and keys and exposes events.
18 * @param {Boolean} allowFunctions True if the addAll function should add function references to the
19 * collection (defaults to false)
20 * @param {Function} keyFn A function that can accept an item of the type(s) stored in this MixedCollection
21 * and return the key value for that item. This is used when available to look up the key on items that
22 * were passed without an explicit key parameter to a MixedCollection method. Passing this parameter is
23 * equivalent to providing an implementation for the {@link #getKey} method.
25 Roo.util.MixedCollection = function(allowFunctions, keyFn){
33 * Fires when the collection is cleared.
38 * Fires when an item is added to the collection.
39 * @param {Number} index The index at which the item was added.
40 * @param {Object} o The item added.
41 * @param {String} key The key associated with the added item.
46 * Fires when an item is replaced in the collection.
47 * @param {String} key he key associated with the new added.
48 * @param {Object} old The item being replaced.
49 * @param {Object} new The new item.
54 * Fires when an item is removed from the collection.
55 * @param {Object} o The item being removed.
56 * @param {String} key (optional) The key associated with the removed item.
61 this.allowFunctions = allowFunctions === true;
65 Roo.util.MixedCollection.superclass.constructor.call(this);
68 Roo.extend(Roo.util.MixedCollection, Roo.util.Observable, {
69 allowFunctions : false,
72 * Adds an item to the collection.
73 * @param {String} key The key to associate with the item
74 * @param {Object} o The item to add.
75 * @return {Object} The item added.
77 add : function(key, o){
79 if(arguments.length == 1){
85 if(typeof key == "undefined" || key === null){
90 var old = this.map[key];
92 return this.replace(key, o);
99 this.fireEvent("add", this.length-1, o, key);
104 * MixedCollection has a generic way to fetch keys if you implement getKey.
107 var mc = new Roo.util.MixedCollection();
108 mc.add(someEl.dom.id, someEl);
109 mc.add(otherEl.dom.id, otherEl);
113 var mc = new Roo.util.MixedCollection();
114 mc.getKey = function(el){
120 // or via the constructor
121 var mc = new Roo.util.MixedCollection(false, function(el){
127 * @param o {Object} The item for which to find the key.
128 * @return {Object} The key for the passed item.
130 getKey : function(o){
135 * Replaces an item in the collection.
136 * @param {String} key The key associated with the item to replace, or the item to replace.
137 * @param o {Object} o (optional) If the first parameter passed was a key, the item to associate with that key.
138 * @return {Object} The new item.
140 replace : function(key, o){
141 if(arguments.length == 1){
143 key = this.getKey(o);
145 var old = this.item(key);
146 if(typeof key == "undefined" || key === null || typeof old == "undefined"){
147 return this.add(key, o);
149 var index = this.indexOfKey(key);
150 this.items[index] = o;
152 this.fireEvent("replace", key, old, o);
157 * Adds all elements of an Array or an Object to the collection.
158 * @param {Object/Array} objs An Object containing properties which will be added to the collection, or
159 * an Array of values, each of which are added to the collection.
161 addAll : function(objs){
162 if(arguments.length > 1 || objs instanceof Array){
163 var args = arguments.length > 1 ? arguments : objs;
164 for(var i = 0, len = args.length; i < len; i++){
168 for(var key in objs){
169 if(this.allowFunctions || typeof objs[key] != "function"){
170 this.add(key, objs[key]);
177 * Executes the specified function once for every item in the collection, passing each
178 * item as the first and only parameter. returning false from the function will stop the iteration.
179 * @param {Function} fn The function to execute for each item.
180 * @param {Object} scope (optional) The scope in which to execute the function.
182 each : function(fn, scope){
183 var items = [].concat(this.items); // each safe for removal
184 for(var i = 0, len = items.length; i < len; i++){
185 if(fn.call(scope || items[i], items[i], i, len) === false){
192 * Executes the specified function once for every key in the collection, passing each
193 * key, and its associated item as the first two parameters.
194 * @param {Function} fn The function to execute for each item.
195 * @param {Object} scope (optional) The scope in which to execute the function.
197 eachKey : function(fn, scope){
198 for(var i = 0, len = this.keys.length; i < len; i++){
199 fn.call(scope || window, this.keys[i], this.items[i], i, len);
204 * Returns the first item in the collection which elicits a true return value from the
205 * passed selection function.
206 * @param {Function} fn The selection function to execute for each item.
207 * @param {Object} scope (optional) The scope in which to execute the function.
208 * @return {Object} The first item in the collection which returned true from the selection function.
210 find : function(fn, scope){
211 for(var i = 0, len = this.items.length; i < len; i++){
212 if(fn.call(scope || window, this.items[i], this.keys[i])){
213 return this.items[i];
220 * Inserts an item at the specified index in the collection.
221 * @param {Number} index The index to insert the item at.
222 * @param {String} key The key to associate with the new item, or the item itself.
223 * @param {Object} o (optional) If the second parameter was a key, the new item.
224 * @return {Object} The item inserted.
226 insert : function(index, key, o){
227 if(arguments.length == 2){
229 key = this.getKey(o);
231 if(index >= this.length){
232 return this.add(key, o);
235 this.items.splice(index, 0, o);
236 if(typeof key != "undefined" && key != null){
239 this.keys.splice(index, 0, key);
240 this.fireEvent("add", index, o, key);
245 * Removed an item from the collection.
246 * @param {Object} o The item to remove.
247 * @return {Object} The item removed.
249 remove : function(o){
250 return this.removeAt(this.indexOf(o));
254 * Remove an item from a specified index in the collection.
255 * @param {Number} index The index within the collection of the item to remove.
257 removeAt : function(index){
258 if(index < this.length && index >= 0){
260 var o = this.items[index];
261 this.items.splice(index, 1);
262 var key = this.keys[index];
263 if(typeof key != "undefined"){
264 delete this.map[key];
266 this.keys.splice(index, 1);
267 this.fireEvent("remove", o, key);
272 * Removed an item associated with the passed key fom the collection.
273 * @param {String} key The key of the item to remove.
275 removeKey : function(key){
276 return this.removeAt(this.indexOfKey(key));
280 * Returns the number of items in the collection.
281 * @return {Number} the number of items in the collection.
283 getCount : function(){
288 * Returns index within the collection of the passed Object.
289 * @param {Object} o The item to find the index of.
290 * @return {Number} index of the item.
292 indexOf : function(o){
293 if(!this.items.indexOf){
294 for(var i = 0, len = this.items.length; i < len; i++){
295 if(this.items[i] == o) return i;
299 return this.items.indexOf(o);
304 * Returns index within the collection of the passed key.
305 * @param {String} key The key to find the index of.
306 * @return {Number} index of the key.
308 indexOfKey : function(key){
309 if(!this.keys.indexOf){
310 for(var i = 0, len = this.keys.length; i < len; i++){
311 if(this.keys[i] == key) return i;
315 return this.keys.indexOf(key);
320 * Returns the item associated with the passed key OR index. Key has priority over index.
321 * @param {String/Number} key The key or index of the item.
322 * @return {Object} The item associated with the passed key.
324 item : function(key){
325 var item = typeof this.map[key] != "undefined" ? this.map[key] : this.items[key];
326 return typeof item != 'function' || this.allowFunctions ? item : null; // for prototype!
330 * Returns the item at the specified index.
331 * @param {Number} index The index of the item.
334 itemAt : function(index){
335 return this.items[index];
339 * Returns the item associated with the passed key.
340 * @param {String/Number} key The key of the item.
341 * @return {Object} The item associated with the passed key.
344 return this.map[key];
348 * Returns true if the collection contains the passed Object as an item.
349 * @param {Object} o The Object to look for in the collection.
350 * @return {Boolean} True if the collection contains the Object as an item.
352 contains : function(o){
353 return this.indexOf(o) != -1;
357 * Returns true if the collection contains the passed Object as a key.
358 * @param {String} key The key to look for in the collection.
359 * @return {Boolean} True if the collection contains the Object as a key.
361 containsKey : function(key){
362 return typeof this.map[key] != "undefined";
366 * Removes all items from the collection.
373 this.fireEvent("clear");
377 * Returns the first item in the collection.
378 * @return {Object} the first item in the collection..
381 return this.items[0];
385 * Returns the last item in the collection.
386 * @return {Object} the last item in the collection..
389 return this.items[this.length-1];
392 _sort : function(property, dir, fn){
393 var dsc = String(dir).toUpperCase() == "DESC" ? -1 : 1;
394 fn = fn || function(a, b){
397 var c = [], k = this.keys, items = this.items;
398 for(var i = 0, len = items.length; i < len; i++){
399 c[c.length] = {key: k[i], value: items[i], index: i};
401 c.sort(function(a, b){
402 var v = fn(a[property], b[property]) * dsc;
404 v = (a.index < b.index ? -1 : 1);
408 for(var i = 0, len = c.length; i < len; i++){
409 items[i] = c[i].value;
412 this.fireEvent("sort", this);
416 * Sorts this collection with the passed comparison function
417 * @param {String} direction (optional) "ASC" or "DESC"
418 * @param {Function} fn (optional) comparison function
420 sort : function(dir, fn){
421 this._sort("value", dir, fn);
425 * Sorts this collection by keys
426 * @param {String} direction (optional) "ASC" or "DESC"
427 * @param {Function} fn (optional) a comparison function (defaults to case insensitive string)
429 keySort : function(dir, fn){
430 this._sort("key", dir, fn || function(a, b){
431 return String(a).toUpperCase()-String(b).toUpperCase();
436 * Returns a range of items in this collection
437 * @param {Number} startIndex (optional) defaults to 0
438 * @param {Number} endIndex (optional) default to the last item
439 * @return {Array} An array of items
441 getRange : function(start, end){
442 var items = this.items;
443 if(items.length < 1){
447 end = Math.min(typeof end == "undefined" ? this.length-1 : end, this.length-1);
450 for(var i = start; i <= end; i++) {
451 r[r.length] = items[i];
454 for(var i = start; i >= end; i--) {
455 r[r.length] = items[i];
462 * Filter the <i>objects</i> in this collection by a specific property.
463 * Returns a new collection that has been filtered.
464 * @param {String} property A property on your objects
465 * @param {String/RegExp} value Either string that the property values
466 * should start with or a RegExp to test against the property
467 * @return {MixedCollection} The new filtered collection
469 filter : function(property, value){
470 if(!value.exec){ // not a regex
471 value = String(value);
472 if(value.length == 0){
475 value = new RegExp("^" + Roo.escapeRe(value), "i");
477 return this.filterBy(function(o){
478 return o && value.test(o[property]);
483 * Filter by a function. * Returns a new collection that has been filtered.
484 * The passed function will be called with each
485 * object in the collection. If the function returns true, the value is included
486 * otherwise it is filtered.
487 * @param {Function} fn The function to be called, it will receive the args o (the object), k (the key)
488 * @param {Object} scope (optional) The scope of the function (defaults to this)
489 * @return {MixedCollection} The new filtered collection
491 filterBy : function(fn, scope){
492 var r = new Roo.util.MixedCollection();
493 r.getKey = this.getKey;
494 var k = this.keys, it = this.items;
495 for(var i = 0, len = it.length; i < len; i++){
496 if(fn.call(scope||this, it[i], k[i])){
504 * Creates a duplicate of this collection
505 * @return {MixedCollection}
508 var r = new Roo.util.MixedCollection();
509 var k = this.keys, it = this.items;
510 for(var i = 0, len = it.length; i < len; i++){
513 r.getKey = this.getKey;
518 * Returns the item associated with the passed key or index.
520 * @param {String/Number} key The key or index of the item.
521 * @return {Object} The item associated with the passed key.
523 Roo.util.MixedCollection.prototype.get = Roo.util.MixedCollection.prototype.item;