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tvheadend/vendor/ext-3.4.1/docs/source/MixedCollection.html
Adam Sutton bafcfff42d webui: restructure webui/extjs source files 
I want to keep the 3rd-party packages away from the main source
where possible.
2013-06-03 17:11:01 +01:00

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<pre class="prettyprint lang-js"><span id='Ext-util-MixedCollection-method-constructor'><span id='Ext-util-MixedCollection'>/**
</span></span> * @class Ext.util.MixedCollection
* @extends Ext.util.Observable
* A Collection class that maintains both numeric indexes and keys and exposes events.
* @constructor
* @param {Boolean} allowFunctions Specify &lt;tt&gt;true&lt;/tt&gt; if the {@link #addAll}
* function should add function references to the collection. Defaults to
* &lt;tt&gt;false&lt;/tt&gt;.
* @param {Function} keyFn A function that can accept an item of the type(s) stored in this MixedCollection
* and return the key value for that item. This is used when available to look up the key on items that
* were passed without an explicit key parameter to a MixedCollection method. Passing this parameter is
* equivalent to providing an implementation for the {@link #getKey} method.
*/
Ext.util.MixedCollection = function(allowFunctions, keyFn){
this.items = [];
this.map = {};
this.keys = [];
this.length = 0;
this.addEvents(
<span id='Ext-util-MixedCollection-event-clear'> /**
</span> * @event clear
* Fires when the collection is cleared.
*/
'clear',
<span id='Ext-util-MixedCollection-event-add'> /**
</span> * @event add
* Fires when an item is added to the collection.
* @param {Number} index The index at which the item was added.
* @param {Object} o The item added.
* @param {String} key The key associated with the added item.
*/
'add',
<span id='Ext-util-MixedCollection-event-replace'> /**
</span> * @event replace
* Fires when an item is replaced in the collection.
* @param {String} key he key associated with the new added.
* @param {Object} old The item being replaced.
* @param {Object} new The new item.
*/
'replace',
<span id='Ext-util-MixedCollection-event-remove'> /**
</span> * @event remove
* Fires when an item is removed from the collection.
* @param {Object} o The item being removed.
* @param {String} key (optional) The key associated with the removed item.
*/
'remove',
'sort'
);
this.allowFunctions = allowFunctions === true;
if(keyFn){
this.getKey = keyFn;
}
Ext.util.MixedCollection.superclass.constructor.call(this);
};
Ext.extend(Ext.util.MixedCollection, Ext.util.Observable, {
<span id='Ext-util-MixedCollection-cfg-allowFunctions'> /**
</span> * @cfg {Boolean} allowFunctions Specify &lt;tt&gt;true&lt;/tt&gt; if the {@link #addAll}
* function should add function references to the collection. Defaults to
* &lt;tt&gt;false&lt;/tt&gt;.
*/
allowFunctions : false,
<span id='Ext-util-MixedCollection-method-add'> /**
</span> * Adds an item to the collection. Fires the {@link #add} event when complete.
* @param {String} key &lt;p&gt;The key to associate with the item, or the new item.&lt;/p&gt;
* &lt;p&gt;If a {@link #getKey} implementation was specified for this MixedCollection,
* or if the key of the stored items is in a property called &lt;tt&gt;&lt;b&gt;id&lt;/b&gt;&lt;/tt&gt;,
* the MixedCollection will be able to &lt;i&gt;derive&lt;/i&gt; the key for the new item.
* In this case just pass the new item in this parameter.&lt;/p&gt;
* @param {Object} o The item to add.
* @return {Object} The item added.
*/
add : function(key, o){
if(arguments.length == 1){
o = arguments[0];
key = this.getKey(o);
}
if(typeof key != 'undefined' &amp;&amp; key !== null){
var old = this.map[key];
if(typeof old != 'undefined'){
return this.replace(key, o);
}
this.map[key] = o;
}
this.length++;
this.items.push(o);
this.keys.push(key);
this.fireEvent('add', this.length-1, o, key);
return o;
},
<span id='Ext-util-MixedCollection-method-getKey'> /**
</span> * MixedCollection has a generic way to fetch keys if you implement getKey. The default implementation
* simply returns &lt;b&gt;&lt;code&gt;item.id&lt;/code&gt;&lt;/b&gt; but you can provide your own implementation
* to return a different value as in the following examples:&lt;pre&gt;&lt;code&gt;
// 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);
* &lt;/code&gt;&lt;/pre&gt;
* @param {Object} item The item for which to find the key.
* @return {Object} The key for the passed item.
*/
getKey : function(o){
return o.id;
},
<span id='Ext-util-MixedCollection-method-replace'> /**
</span> * Replaces an item in the collection. Fires the {@link #replace} event when complete.
* @param {String} key &lt;p&gt;The key associated with the item to replace, or the replacement item.&lt;/p&gt;
* &lt;p&gt;If you supplied a {@link #getKey} implementation for this MixedCollection, or if the key
* of your stored items is in a property called &lt;tt&gt;&lt;b&gt;id&lt;/b&gt;&lt;/tt&gt;, then the MixedCollection
* will be able to &lt;i&gt;derive&lt;/i&gt; 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.&lt;/p&gt;
* @param o {Object} o (optional) If the first parameter passed was a key, the item to associate
* with that key.
* @return {Object} The new item.
*/
replace : function(key, o){
if(arguments.length == 1){
o = arguments[0];
key = this.getKey(o);
}
var old = this.map[key];
if(typeof key == 'undefined' || key === null || typeof old == 'undefined'){
return this.add(key, o);
}
var index = this.indexOfKey(key);
this.items[index] = o;
this.map[key] = o;
this.fireEvent('replace', key, old, o);
return o;
},
<span id='Ext-util-MixedCollection-method-addAll'> /**
</span> * Adds all elements of an Array or an Object to the collection.
* @param {Object/Array} objs An Object containing properties which will be added
* to the collection, or an Array of values, each of which are added to the collection.
* Functions references will be added to the collection if &lt;code&gt;{@link #allowFunctions}&lt;/code&gt;
* has been set to &lt;tt&gt;true&lt;/tt&gt;.
*/
addAll : function(objs){
if(arguments.length &gt; 1 || Ext.isArray(objs)){
var args = arguments.length &gt; 1 ? arguments : objs;
for(var i = 0, len = args.length; i &lt; len; i++){
this.add(args[i]);
}
}else{
for(var key in objs){
if(this.allowFunctions || typeof objs[key] != 'function'){
this.add(key, objs[key]);
}
}
}
},
<span id='Ext-util-MixedCollection-method-each'> /**
</span> * Executes the specified function once for every item in the collection, passing the following arguments:
* &lt;div class=&quot;mdetail-params&quot;&gt;&lt;ul&gt;
* &lt;li&gt;&lt;b&gt;item&lt;/b&gt; : Mixed&lt;p class=&quot;sub-desc&quot;&gt;The collection item&lt;/p&gt;&lt;/li&gt;
* &lt;li&gt;&lt;b&gt;index&lt;/b&gt; : Number&lt;p class=&quot;sub-desc&quot;&gt;The item's index&lt;/p&gt;&lt;/li&gt;
* &lt;li&gt;&lt;b&gt;length&lt;/b&gt; : Number&lt;p class=&quot;sub-desc&quot;&gt;The total number of items in the collection&lt;/p&gt;&lt;/li&gt;
* &lt;/ul&gt;&lt;/div&gt;
* 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 {Object} scope (optional) The scope (&lt;code&gt;this&lt;/code&gt; 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
for(var i = 0, len = items.length; i &lt; len; i++){
if(fn.call(scope || items[i], items[i], i, len) === false){
break;
}
}
},
<span id='Ext-util-MixedCollection-method-eachKey'> /**
</span> * 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 {Object} scope (optional) The scope (&lt;code&gt;this&lt;/code&gt; reference) in which the function is executed. Defaults to the browser window.
*/
eachKey : function(fn, scope){
for(var i = 0, len = this.keys.length; i &lt; len; i++){
fn.call(scope || window, this.keys[i], this.items[i], i, len);
}
},
<span id='Ext-util-MixedCollection-method-find'> /**
</span> * 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 {Object} scope (optional) The scope (&lt;code&gt;this&lt;/code&gt; 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.
*/
find : function(fn, scope){
for(var i = 0, len = this.items.length; i &lt; len; i++){
if(fn.call(scope || window, this.items[i], this.keys[i])){
return this.items[i];
}
}
return null;
},
<span id='Ext-util-MixedCollection-method-insert'> /**
</span> * Inserts an item at the specified index in the collection. Fires the {@link #add} event when complete.
* @param {Number} index The index to insert the item at.
* @param {String} key The key to associate with the new item, or the item itself.
* @param {Object} o (optional) If the second parameter was a key, the new item.
* @return {Object} The item inserted.
*/
insert : function(index, key, o){
if(arguments.length == 2){
o = arguments[1];
key = this.getKey(o);
}
if(this.containsKey(key)){
this.suspendEvents();
this.removeKey(key);
this.resumeEvents();
}
if(index &gt;= this.length){
return this.add(key, o);
}
this.length++;
this.items.splice(index, 0, o);
if(typeof key != 'undefined' &amp;&amp; key !== null){
this.map[key] = o;
}
this.keys.splice(index, 0, key);
this.fireEvent('add', index, o, key);
return o;
},
<span id='Ext-util-MixedCollection-method-remove'> /**
</span> * Remove an item from the collection.
* @param {Object} o The item to remove.
* @return {Object} The item removed or false if no item was removed.
*/
remove : function(o){
return this.removeAt(this.indexOf(o));
},
<span id='Ext-util-MixedCollection-method-removeAt'> /**
</span> * Remove an item from a specified index in the collection. Fires the {@link #remove} event when complete.
* @param {Number} index The index within the collection of the item to remove.
* @return {Object} The item removed or false if no item was removed.
*/
removeAt : function(index){
if(index &lt; this.length &amp;&amp; index &gt;= 0){
this.length--;
var o = this.items[index];
this.items.splice(index, 1);
var key = this.keys[index];
if(typeof key != 'undefined'){
delete this.map[key];
}
this.keys.splice(index, 1);
this.fireEvent('remove', o, key);
return o;
}
return false;
},
<span id='Ext-util-MixedCollection-method-removeKey'> /**
</span> * Removed an item associated with the passed key fom the collection.
* @param {String} key The key of the item to remove.
* @return {Object} The item removed or false if no item was removed.
*/
removeKey : function(key){
return this.removeAt(this.indexOfKey(key));
},
<span id='Ext-util-MixedCollection-method-getCount'> /**
</span> * Returns the number of items in the collection.
* @return {Number} the number of items in the collection.
*/
getCount : function(){
return this.length;
},
<span id='Ext-util-MixedCollection-method-indexOf'> /**
</span> * Returns index within the collection of the passed Object.
* @param {Object} o The item to find the index of.
* @return {Number} index of the item. Returns -1 if not found.
*/
indexOf : function(o){
return this.items.indexOf(o);
},
<span id='Ext-util-MixedCollection-method-indexOfKey'> /**
</span> * Returns index within the collection of the passed key.
* @param {String} key The key to find the index of.
* @return {Number} index of the key.
*/
indexOfKey : function(key){
return this.keys.indexOf(key);
},
<span id='Ext-util-MixedCollection-method-item'> /**
</span> * Returns the item associated with the passed key OR index.
* Key has priority over index. This is the equivalent
* of calling {@link #key} first, then if nothing matched calling {@link #itemAt}.
* @param {String/Number} key The key or index of the item.
* @return {Object} If the item is found, returns the item. If the item was not found, returns &lt;tt&gt;undefined&lt;/tt&gt;.
* If an item was found, but is a Class, returns &lt;tt&gt;null&lt;/tt&gt;.
*/
item : function(key){
var mk = this.map[key],
item = mk !== undefined ? mk : (typeof key == 'number') ? this.items[key] : undefined;
return typeof item != 'function' || this.allowFunctions ? item : null; // for prototype!
},
<span id='Ext-util-MixedCollection-method-itemAt'> /**
</span> * Returns the item at the specified index.
* @param {Number} index The index of the item.
* @return {Object} The item at the specified index.
*/
itemAt : function(index){
return this.items[index];
},
<span id='Ext-util-MixedCollection-method-key'> /**
</span> * 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.
*/
key : function(key){
return this.map[key];
},
<span id='Ext-util-MixedCollection-method-contains'> /**
</span> * 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 this.indexOf(o) != -1;
},
<span id='Ext-util-MixedCollection-method-containsKey'> /**
</span> * 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';
},
<span id='Ext-util-MixedCollection-method-clear'> /**
</span> * Removes all items from the collection. Fires the {@link #clear} event when complete.
*/
clear : function(){
this.length = 0;
this.items = [];
this.keys = [];
this.map = {};
this.fireEvent('clear');
},
<span id='Ext-util-MixedCollection-method-first'> /**
</span> * Returns the first item in the collection.
* @return {Object} the first item in the collection..
*/
first : function(){
return this.items[0];
},
<span id='Ext-util-MixedCollection-method-last'> /**
</span> * Returns the last item in the collection.
* @return {Object} the last item in the collection..
*/
last : function(){
return this.items[this.length-1];
},
<span id='Ext-util-MixedCollection-method-_sort'> /**
</span> * @private
* Performs the actual sorting based on a direction and a sorting function. Internally,
* this creates a temporary array of all items in the MixedCollection, sorts it and then writes
* the sorted array data back into this.items and this.keys
* @param {String} property Property to sort by ('key', 'value', or 'index')
* @param {String} dir (optional) Direction to sort 'ASC' or 'DESC'. Defaults to 'ASC'.
* @param {Function} fn (optional) Comparison function that defines the sort order.
* Defaults to sorting by numeric value.
*/
_sort : function(property, dir, fn){
var i, len,
dsc = String(dir).toUpperCase() == 'DESC' ? -1 : 1,
//this is a temporary array used to apply the sorting function
c = [],
keys = this.keys,
items = this.items;
//default to a simple sorter function if one is not provided
fn = fn || function(a, b) {
return a - b;
};
//copy all the items into a temporary array, which we will sort
for(i = 0, len = items.length; i &lt; len; i++){
c[c.length] = {
key : keys[i],
value: items[i],
index: i
};
}
//sort the temporary array
c.sort(function(a, b){
var v = fn(a[property], b[property]) * dsc;
if(v === 0){
v = (a.index &lt; b.index ? -1 : 1);
}
return v;
});
//copy the temporary array back into the main this.items and this.keys objects
for(i = 0, len = c.length; i &lt; len; i++){
items[i] = c[i].value;
keys[i] = c[i].key;
}
this.fireEvent('sort', this);
},
<span id='Ext-util-MixedCollection-method-sort'> /**
</span> * Sorts this collection by &lt;b&gt;item&lt;/b&gt; value with the passed comparison function.
* @param {String} direction (optional) 'ASC' or 'DESC'. Defaults to 'ASC'.
* @param {Function} fn (optional) Comparison function that defines the sort order.
* Defaults to sorting by numeric value.
*/
sort : function(dir, fn){
this._sort('value', dir, fn);
},
<span id='Ext-util-MixedCollection-method-reorder'> /**
</span> * Reorders each of the items based on a mapping from old index to new index. Internally this
* just translates into a sort. The 'sort' event is fired whenever reordering has occured.
* @param {Object} mapping Mapping from old item index to new item index
*/
reorder: function(mapping) {
this.suspendEvents();
var items = this.items,
index = 0,
length = items.length,
order = [],
remaining = [],
oldIndex;
//object of {oldPosition: newPosition} reversed to {newPosition: oldPosition}
for (oldIndex in mapping) {
order[mapping[oldIndex]] = items[oldIndex];
}
for (index = 0; index &lt; length; index++) {
if (mapping[index] == undefined) {
remaining.push(items[index]);
}
}
for (index = 0; index &lt; length; index++) {
if (order[index] == undefined) {
order[index] = remaining.shift();
}
}
this.clear();
this.addAll(order);
this.resumeEvents();
this.fireEvent('sort', this);
},
<span id='Ext-util-MixedCollection-method-keySort'> /**
</span> * Sorts this collection by &lt;b&gt;key&lt;/b&gt;s.
* @param {String} direction (optional) 'ASC' or 'DESC'. Defaults to 'ASC'.
* @param {Function} fn (optional) Comparison function that defines the sort order.
* Defaults to sorting by case insensitive string.
*/
keySort : function(dir, fn){
this._sort('key', dir, fn || function(a, b){
var v1 = String(a).toUpperCase(), v2 = String(b).toUpperCase();
return v1 &gt; v2 ? 1 : (v1 &lt; v2 ? -1 : 0);
});
},
<span id='Ext-util-MixedCollection-method-getRange'> /**
</span> * 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 items = this.items;
if(items.length &lt; 1){
return [];
}
start = start || 0;
end = Math.min(typeof end == 'undefined' ? this.length-1 : end, this.length-1);
var i, r = [];
if(start &lt;= end){
for(i = start; i &lt;= end; i++) {
r[r.length] = items[i];
}
}else{
for(i = start; i &gt;= end; i--) {
r[r.length] = items[i];
}
}
return r;
},
<span id='Ext-util-MixedCollection-method-filter'> /**
</span> * Filter the &lt;i&gt;objects&lt;/i&gt; in this collection by a specific property.
* Returns a new collection that has been filtered.
* @param {String} property A property on your objects
* @param {String/RegExp} value Either string that the property values
* should start with or a RegExp to test against the property
* @param {Boolean} anyMatch (optional) True to match any part of the string, not just the beginning
* @param {Boolean} caseSensitive (optional) True for case sensitive comparison (defaults to False).
* @return {MixedCollection} The new filtered collection
*/
filter : function(property, value, anyMatch, caseSensitive){
if(Ext.isEmpty(value, false)){
return this.clone();
}
value = this.createValueMatcher(value, anyMatch, caseSensitive);
return this.filterBy(function(o){
return o &amp;&amp; value.test(o[property]);
});
},
<span id='Ext-util-MixedCollection-method-filterBy'> /**
</span> * Filter by a function. Returns a &lt;i&gt;new&lt;/i&gt; collection that has been filtered.
* The passed function will be called with each object in the collection.
* If the function returns true, the value is included otherwise it is filtered.
* @param {Function} fn The function to be called, it will receive the args o (the object), k (the key)
* @param {Object} scope (optional) The scope (&lt;code&gt;this&lt;/code&gt; reference) in which the function is executed. Defaults to this MixedCollection.
* @return {MixedCollection} The new filtered collection
*/
filterBy : function(fn, scope){
var r = new Ext.util.MixedCollection();
r.getKey = this.getKey;
var k = this.keys, it = this.items;
for(var i = 0, len = it.length; i &lt; len; i++){
if(fn.call(scope||this, it[i], k[i])){
r.add(k[i], it[i]);
}
}
return r;
},
<span id='Ext-util-MixedCollection-method-findIndex'> /**
</span> * 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 (optional) The index to start searching at (defaults to 0).
* @param {Boolean} anyMatch (optional) True to match any part of the string, not just the beginning.
* @param {Boolean} caseSensitive (optional) 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 &amp;&amp; value.test(o[property]);
}, null, start);
},
<span id='Ext-util-MixedCollection-method-findIndexBy'> /**
</span> * Find the index of the first matching object in this collection by a function.
* If the function returns &lt;i&gt;true&lt;/i&gt; it is considered a match.
* @param {Function} fn The function to be called, it will receive the args o (the object), k (the key).
* @param {Object} scope (optional) The scope (&lt;code&gt;this&lt;/code&gt; reference) in which the function is executed. Defaults to this MixedCollection.
* @param {Number} start (optional) The index to start searching at (defaults to 0).
* @return {Number} The matched index or -1
*/
findIndexBy : function(fn, scope, start){
var k = this.keys, it = this.items;
for(var i = (start||0), len = it.length; i &lt; len; i++){
if(fn.call(scope||this, it[i], k[i])){
return i;
}
}
return -1;
},
<span id='Ext-util-MixedCollection-method-createValueMatcher'> /**
</span> * 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.escapeRe;
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;
},
<span id='Ext-util-MixedCollection-method-clone'> /**
</span> * Creates a shallow copy of this collection
* @return {MixedCollection}
*/
clone : function(){
var r = new Ext.util.MixedCollection();
var k = this.keys, it = this.items;
for(var i = 0, len = it.length; i &lt; len; i++){
r.add(k[i], it[i]);
}
r.getKey = this.getKey;
return r;
}
});
<span id='Ext-util-MixedCollection-method-get'>/**
</span> * This method calls {@link #item item()}.
* Returns the item associated with the passed key OR index. Key has priority
* over index. This is the equivalent of calling {@link #key} first, then if
* nothing matched calling {@link #itemAt}.
* @param {String/Number} key The key or index of the item.
* @return {Object} If the item is found, returns the item. If the item was
* not found, returns &lt;tt&gt;undefined&lt;/tt&gt;. If an item was found, but is a Class,
* returns &lt;tt&gt;null&lt;/tt&gt;.
*/
Ext.util.MixedCollection.prototype.get = Ext.util.MixedCollection.prototype.item;
</pre>
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