true if the {@link #addAll}
* function should add function references to the collection. Defaults to
* false.
*/
allowFunctions : false,
/**
* Adds an item to the collection. Fires the {@link #event-add} event when complete.
*
* @param {String/Object} key The key to associate with the item, or the new item.
*
* If a {@link #getKey} implementation was specified for this MixedCollection,
* or if the key of the stored items is in a property called `id`,
* the MixedCollection will be able to *derive* the key for the new item.
* In this case just pass the new item in this parameter.
*
* @param {Object} [o] The item to add.
*
* @return {Object} The item added.
*/
add : function(key, obj){
var me = this,
myObj = obj,
myKey = key,
old;
if (arguments.length == 1) {
myObj = myKey;
myKey = me.getKey(myObj);
}
if (typeof myKey != 'undefined' && myKey !== null) {
old = me.map[myKey];
if (typeof old != 'undefined') {
return me.replace(myKey, myObj);
}
me.map[myKey] = myObj;
}
me.generation++;
me.length++;
me.items.push(myObj);
me.keys.push(myKey);
if (me.hasListeners.add) {
me.fireEvent('add', me.length - 1, myObj, myKey);
}
return myObj;
},
/**
* MixedCollection has a generic way to fetch keys if you implement getKey. The default implementation
* simply returns item.id but you can provide your own implementation
* to return a different value as in the following examples:
// normal way
var mc = new Ext.util.MixedCollection();
mc.add(someEl.dom.id, someEl);
mc.add(otherEl.dom.id, otherEl);
//and so on
// using getKey
var mc = new Ext.util.MixedCollection();
mc.getKey = function(el){
return el.dom.id;
};
mc.add(someEl);
mc.add(otherEl);
// or via the constructor
var mc = new Ext.util.MixedCollection(false, function(el){
return el.dom.id;
});
mc.add(someEl);
mc.add(otherEl);
* The key associated with the item to replace, or the replacement item.
*If you supplied a {@link #getKey} implementation for this MixedCollection, or if the key
* of your stored items is in a property called id, then the MixedCollection
* will be able to derive the key of the replacement item. If you want to replace an item
* with one having the same key value, then just pass the replacement item in this parameter.
{@link #allowFunctions}
* has been set to true.
*/
addAll : function(objs){
var me = this,
i = 0,
args,
len,
key;
if (arguments.length > 1 || Ext.isArray(objs)) {
args = arguments.length > 1 ? arguments : objs;
for (len = args.length; i < len; i++) {
me.add(args[i]);
}
} else {
for (key in objs) {
if (objs.hasOwnProperty(key)) {
if (me.allowFunctions || typeof objs[key] != 'function') {
me.add(key, objs[key]);
}
}
}
}
},
/**
* Executes the specified function once for every item in the collection.
* The function should return a boolean value.
* Returning false from the function will stop the iteration.
*
* @param {Function} fn The function to execute for each item.
* @param {Mixed} fn.item The collection item.
* @param {Number} fn.index The index of item.
* @param {Number} fn.len Total length of collection.
* @param {Object} scope (optional) The scope (this reference)
* in which the function is executed. Defaults to the current item in the iteration.
*/
each : function(fn, scope){
var items = [].concat(this.items), // each safe for removal
i = 0,
len = items.length,
item;
for (; i < len; i++) {
item = items[i];
if (fn.call(scope || item, item, i, len) === false) {
break;
}
}
},
/**
* Executes the specified function once for every key in the collection, passing each
* key, and its associated item as the first two parameters.
* @param {Function} fn The function to execute for each item.
* @param {String} fn.key The key of collection item.
* @param {Mixed} fn.item The collection item.
* @param {Number} fn.index The index of item.
* @param {Number} fn.len Total length of collection.
* @param {Object} scope (optional) The scope (this reference) in which the
* function is executed. Defaults to the browser window.
*/
eachKey : function(fn, scope){
var keys = this.keys,
items = this.items,
i = 0,
len = keys.length;
for (; i < len; i++) {
fn.call(scope || window, keys[i], items[i], i, len);
}
},
/**
* Returns the first item in the collection which elicits a true return value from the
* passed selection function.
* @param {Function} fn The selection function to execute for each item.
* @param {Mixed} fn.item The collection item.
* @param {String} fn.key The key of collection item.
* @param {Object} scope (optional) The scope (this reference) in which the
* function is executed. Defaults to the browser window.
* @return {Object} The first item in the collection which returned true from the selection
* function, or null if none was found.
*/
findBy : function(fn, scope) {
var keys = this.keys,
items = this.items,
i = 0,
len = items.length;
for (; i < len; i++) {
if (fn.call(scope || window, items[i], keys[i])) {
return items[i];
}
}
return null;
},
//undefined.
* If an item was found, but is a Class, returns null.
*/
get : function(key) {
var me = this,
mk = me.map[key],
item = mk !== undefined ? mk : (typeof key == 'number') ? me.items[key] : undefined;
return typeof item != 'function' || me.allowFunctions ? item : null; // for prototype!
},
/**
* Returns the item at the specified index.
* @param {Number} index The index of the item.
* @return {Object} The item at the specified index.
*/
getAt : function(index) {
return this.items[index];
},
/**
* Returns the item associated with the passed key.
* @param {String/Number} key The key of the item.
* @return {Object} The item associated with the passed key.
*/
getByKey : function(key) {
return this.map[key];
},
/**
* Returns true if the collection contains the passed Object as an item.
* @param {Object} o The Object to look for in the collection.
* @return {Boolean} True if the collection contains the Object as an item.
*/
contains : function(o){
return typeof this.map[this.getKey(o)] != 'undefined';
},
/**
* Returns true if the collection contains the passed Object as a key.
* @param {String} key The key to look for in the collection.
* @return {Boolean} True if the collection contains the Object as a key.
*/
containsKey : function(key){
return typeof this.map[key] != 'undefined';
},
/**
* Removes all items from the collection. Fires the {@link #event-clear} event when complete.
*/
clear : function(){
var me = this;
me.length = 0;
me.items = [];
me.keys = [];
me.map = {};
me.generation++;
if (me.hasListeners.clear) {
me.fireEvent('clear');
}
},
/**
* Returns the first item in the collection.
* @return {Object} the first item in the collection..
*/
first : function() {
return this.items[0];
},
/**
* Returns the last item in the collection.
* @return {Object} the last item in the collection..
*/
last : function() {
return this.items[this.length - 1];
},
/**
* Collects all of the values of the given property and returns their sum
* @param {String} property The property to sum by
* @param {String} [root] 'root' property to extract the first argument from. This is used mainly when
* summing fields in records, where the fields are all stored inside the 'data' object
* @param {Number} [start=0] The record index to start at
* @param {Number} [end=-1] The record index to end at
* @return {Number} The total
*/
sum: function(property, root, start, end) {
var values = this.extractValues(property, root),
length = values.length,
sum = 0,
i;
start = start || 0;
end = (end || end === 0) ? end : length - 1;
for (i = start; i <= end; i++) {
sum += values[i];
}
return sum;
},
/**
* Collects unique values of a particular property in this MixedCollection
* @param {String} property The property to collect on
* @param {String} root (optional) 'root' property to extract the first argument from. This is used mainly when
* summing fields in records, where the fields are all stored inside the 'data' object
* @param {Boolean} allowBlank (optional) Pass true to allow null, undefined or empty string values
* @return {Array} The unique values
*/
collect: function(property, root, allowNull) {
var values = this.extractValues(property, root),
length = values.length,
hits = {},
unique = [],
value, strValue, i;
for (i = 0; i < length; i++) {
value = values[i];
strValue = String(value);
if ((allowNull || !Ext.isEmpty(value)) && !hits[strValue]) {
hits[strValue] = true;
unique.push(value);
}
}
return unique;
},
/**
* @private
* Extracts all of the given property values from the items in the MC. Mainly used as a supporting method for
* functions like sum and collect.
* @param {String} property The property to extract
* @param {String} root (optional) 'root' property to extract the first argument from. This is used mainly when
* extracting field data from Model instances, where the fields are stored inside the 'data' object
* @return {Array} The extracted values
*/
extractValues: function(property, root) {
var values = this.items;
if (root) {
values = Ext.Array.pluck(values, root);
}
return Ext.Array.pluck(values, property);
},
/**
* Returns a range of items in this collection
* @param {Number} startIndex (optional) The starting index. Defaults to 0.
* @param {Number} endIndex (optional) The ending index. Defaults to the last item.
* @return {Array} An array of items
*/
getRange : function(start, end){
var me = this,
items = me.items,
range = [],
i;
if (items.length < 1) {
return range;
}
start = start || 0;
end = Math.min(typeof end == 'undefined' ? me.length - 1 : end, me.length - 1);
if (start <= end) {
for (i = start; i <= end; i++) {
range[range.length] = items[i];
}
} else {
for (i = start; i >= end; i--) {
range[range.length] = items[i];
}
}
return range;
},
/**
* Filters the objects in this collection by a set of {@link Ext.util.Filter Filter}s, or by a single * property/value pair with optional parameters for substring matching and case sensitivity. See * {@link Ext.util.Filter Filter} for an example of using Filter objects (preferred). Alternatively, * MixedCollection can be easily filtered by property like this:
//create a simple store with a few people defined
var people = new Ext.util.MixedCollection();
people.addAll([
{id: 1, age: 25, name: 'Ed'},
{id: 2, age: 24, name: 'Tommy'},
{id: 3, age: 24, name: 'Arne'},
{id: 4, age: 26, name: 'Aaron'}
]);
//a new MixedCollection containing only the items where age == 24
var middleAged = people.filter('age', 24);
this reference) in
* which the function is executed. Defaults to this MixedCollection.
* @return {Ext.util.MixedCollection} The new filtered collection
*/
filterBy : function(fn, scope) {
var me = this,
newMC = new this.self(),
keys = me.keys,
items = me.items,
length = items.length,
i;
newMC.getKey = me.getKey;
for (i = 0; i < length; i++) {
if (fn.call(scope || me, items[i], keys[i])) {
newMC.add(keys[i], items[i]);
}
}
return newMC;
},
/**
* Finds the index of the first matching object in this collection by a specific property/value.
* @param {String} property The name of a property on your objects.
* @param {String/RegExp} value A string that the property values
* should start with or a RegExp to test against the property.
* @param {Number} [start=0] The index to start searching at.
* @param {Boolean} [anyMatch=false] True to match any part of the string, not just the beginning.
* @param {Boolean} [caseSensitive=false] True for case sensitive comparison.
* @return {Number} The matched index or -1
*/
findIndex : function(property, value, start, anyMatch, caseSensitive){
if(Ext.isEmpty(value, false)){
return -1;
}
value = this.createValueMatcher(value, anyMatch, caseSensitive);
return this.findIndexBy(function(o){
return o && value.test(o[property]);
}, null, start);
},
/**
* Find the index of the first matching object in this collection by a function.
* If the function returns true it is considered a match.
* @param {Function} fn The function to be called.
* @param {Mixed} fn.item The collection item.
* @param {String} fn.key The key of collection item.
* @param {Object} [scope] The scope (this reference) in which the function is executed. Defaults to this MixedCollection.
* @param {Number} [start=0] The index to start searching at.
* @return {Number} The matched index or -1
*/
findIndexBy : function(fn, scope, start){
var me = this,
keys = me.keys,
items = me.items,
i = start || 0,
len = items.length;
for (; i < len; i++) {
if (fn.call(scope || me, items[i], keys[i])) {
return i;
}
}
return -1;
},
/**
* Returns a regular expression based on the given value and matching options. This is used internally for finding and filtering,
* and by Ext.data.Store#filter
* @private
* @param {String} value The value to create the regex for. This is escaped using Ext.escapeRe
* @param {Boolean} anyMatch True to allow any match - no regex start/end line anchors will be added. Defaults to false
* @param {Boolean} caseSensitive True to make the regex case sensitive (adds 'i' switch to regex). Defaults to false.
* @param {Boolean} exactMatch True to force exact match (^ and $ characters added to the regex). Defaults to false. Ignored if anyMatch is true.
*/
createValueMatcher : function(value, anyMatch, caseSensitive, exactMatch) {
if (!value.exec) { // not a regex
var er = Ext.String.escapeRegex;
value = String(value);
if (anyMatch === true) {
value = er(value);
} else {
value = '^' + er(value);
if (exactMatch === true) {
value += '$';
}
}
value = new RegExp(value, caseSensitive ? '' : 'i');
}
return value;
},
/**
* Creates a shallow copy of this collection
* @return {Ext.util.MixedCollection}
*/
clone : function() {
var me = this,
copy = new this.self(),
keys = me.keys,
items = me.items,
i = 0,
len = items.length;
for(; i < len; i++){
copy.add(keys[i], items[i]);
}
copy.getKey = me.getKey;
return copy;
}
});