simple filterCallback in the options to delegate complex search to end users

Author: johnbender

js/jquery.mobile.listview.filter.js

@@ -10,6 +10,9 @@
 $.mobile.listview.prototype.options.filter = false;
 $.mobile.listview.prototype.options.filterPlaceholder = "Filter items...";
 $.mobile.listview.prototype.options.filterTheme = "c";
+$.mobile.listview.prototype.options.filterCallback = function( text, searchValue ){
+	return text.toLowerCase().indexOf( searchValue ) === -1;
+};
 
 $( ":jqmData(role='listview')" ).live( "listviewcreate", function() {
 
@@ -70,7 +73,7 @@ $( ":jqmData(role='listview')" ).live( "listviewcreate", function() {
 						// New bucket!
 						childItems = false;
 
-					} else if ( itemtext.toLowerCase().indexOf( val ) === -1 ) {
+					} else if ( listview.options.filterCallback( itemtext, val ) ) {
 
 						//mark to be hidden
 						item.toggleClass( "ui-filter-hidequeue" , true );