+/* Fix for Opera, which does not seem to include the map function on Array's */
+if (!Array.prototype.map) {
+ Array.prototype.map = function(fun){
+ var len = this.length;
+ if (typeof fun != 'function') {
+ throw new TypeError();
+ }
+ var res = new Array(len);
+ var thisp = arguments[1];
+ for (var i = 0; i < len; i++) {
+ if (i in this) {
+ res[i] = fun.call(thisp, this[i], i, this);
+ }
+ }
+ return res;
+ };
+}
+
+Ext.ns('Ext.ux.data');
+
+/**
+ * @class Ext.ux.data.PagingMemoryProxy
+ * @extends Ext.data.MemoryProxy
+ * Paging Memory Proxy, allows to use paging grid with in memory dataset
+ */
+Ext.ux.data.PagingMemoryProxy = Ext.extend(Ext.data.MemoryProxy, {
+ constructor : function(data){
+ Ext.ux.data.PagingMemoryProxy.superclass.constructor.call(this);
+ this.data = data;
+ },
+ doRequest : function(action, rs, params, reader, callback, scope, options){
+ params = params ||
+ {};
+ var result;
+ try {
+ result = reader.readRecords(this.data);
+ }
+ catch (e) {
+ this.fireEvent('loadexception', this, options, null, e);
+ callback.call(scope, null, options, false);
+ return;
+ }
+
+ // filtering
+ if (params.filter !== undefined) {
+ result.records = result.records.filter(function(el){
+ if (typeof(el) == 'object') {
+ var att = params.filterCol || 0;
+ return String(el.data[att]).match(params.filter) ? true : false;
+ }
+ else {
+ return String(el).match(params.filter) ? true : false;
+ }
+ });
+ result.totalRecords = result.records.length;
+ }
+
+ // sorting
+ if (params.sort !== undefined) {
+ // use integer as params.sort to specify column, since arrays are not named
+ // params.sort=0; would also match a array without columns
+ var dir = String(params.dir).toUpperCase() == 'DESC' ? -1 : 1;
+ var fn = function(r1, r2){
+ return r1 < r2;
+ };
+ result.records.sort(function(a, b){
+ var v = 0;
+ if (typeof(a) == 'object') {
+ v = fn(a.data[params.sort], b.data[params.sort]) * dir;
+ }
+ else {
+ v = fn(a, b) * dir;
+ }
+ if (v == 0) {
+ v = (a.index < b.index ? -1 : 1);
+ }
+ return v;
+ });
+ }
+ // paging (use undefined cause start can also be 0 (thus false))
+ if (params.start !== undefined && params.limit !== undefined) {
+ result.records = result.records.slice(params.start, params.start + params.limit);
+ }
+ callback.call(scope, result, options, true);
+ }
+});
+
+//backwards compat.
+Ext.data.PagingMemoryProxy = Ext.ux.data.PagingMemoryProxy;
+
+
+
\ No newline at end of file