Listview: Add method updateItems()

In refresh() we still need to retrieve all list items, even when we get a list
of items from updateItems(), because the followings require global knowledge:
- Which items have been removed since last time, so we can untrack them
- Which is the first resp. last item for use with addFirstLastClasses()

Author: Gabriel Schulhof

js/widgets/listview.js

@@ -129,6 +129,10 @@ return $.widget( "mobile.listview", $.extend( {
 	_beforeListviewRefresh: $.noop,
 	_afterListviewRefresh: $.noop,
 
+	updateItems: function( items ) {
+		this._refresh( false, items );
+	},
+
 	refresh: function() {
 		this._refresh();
 	},
@@ -141,10 +145,11 @@ return $.widget( "mobile.listview", $.extend( {
 		return true;
 	},
 
-	_refresh: function( create ) {
+	_refresh: function( create, items ) {
 		var buttonClass, pos, numli, item, itemClass, itemExtraClass, itemTheme, itemIcon, icon, a,
 			isDivider, startCount, newStartCount, value, last, splittheme, splitThemeClass, li, ol,
 			altButtonClass, dividerTheme, start, itemClassDict, dictionaryKey, span, spliticon,
+			allItems,
 			currentOptions = this.options,
 			createEnhanced = create && this.options.enhanced,
 			list = this.element;
@@ -161,7 +166,10 @@ return $.widget( "mobile.listview", $.extend( {
 
 		this._beforeListviewRefresh();
 
-		li = this._getChildrenByTagName( list[ 0 ], "li", "LI" );
+		// We need all items even if a set was passed in - we just won't iterate over them in the
+		// main refresh loop.
+		allItems = this._getChildrenByTagName( list[ 0 ], "li", "LI" );
+		li = items || allItems;
 
 		for ( pos = 0, numli = li.length; pos < numli; pos++ ) {
 			item = li.eq( pos );
@@ -269,7 +277,7 @@ return $.widget( "mobile.listview", $.extend( {
 
 		this._afterListviewRefresh();
 
-		this._addFirstLastClasses( li, this._getVisibles( li, create ), create );
+		this._addFirstLastClasses( allItems, this._getVisibles( allItems, create ), create );
 
 		// Untrack removed items
 		if ( this._oldListItems ) {
@@ -279,7 +287,7 @@ return $.widget( "mobile.listview", $.extend( {
 				} ),
 				"ui-listview-item ui-listview-item-static ui-listview-item-has-count " +
 				"ui-listview-item-has-alternate ui-listview-item-divider" );
-			this._oldListItems = li;
+			this._oldListItems = allItems;
 		}
 	}
 }, $.mobile.behaviors.addFirstLastClasses ) );