GZ/nwyj/.svn/pristine/a3/a36def12a2a4314b86cac5ad9d807de050ba08d5.svn-base

/*
 * Ext JS Library 2.0 Copyright(c) 2006-2007, Ext JS, LLC. licensing@extjs.com
 * 
 * http://extjs.com/license
 */

Ext.data.ScriptTagProxy = function(A) {
	Ext.data.ScriptTagProxy.superclass.constructor.call(this);
	Ext.apply(this, A);
	this.head = document.getElementsByTagName("head")[0]
};
Ext.data.ScriptTagProxy.TRANS_ID = 1000;
Ext.extend(Ext.data.ScriptTagProxy, Ext.data.DataProxy, {
			timeout : 30000,
			callbackParam : "callback",
			nocache : true,
			load : function(E, F, H, I, J) {
				if (this.fireEvent("beforeload", this, E) !== false) {
					var C = Ext.urlEncode(Ext.apply(E, this.extraParams));
					var B = this.url;
					B += (B.indexOf("?") != -1 ? "&" : "?") + C;
					if (this.nocache) {
						B += "&_dc=" + (allGetServerTime().getTime())
					}
					var A = ++Ext.data.ScriptTagProxy.TRANS_ID;
					var K = {
						id : A,
						cb : "stcCallback" + A,
						scriptId : "stcScript" + A,
						params : E,
						arg : J,
						url : B,
						callback : H,
						scope : I,
						reader : F
					};
					var D = this;
					window[K.cb] = function(L) {
						D.handleResponse(L, K)
					};
					B += String.format("&{0}={1}", this.callbackParam, K.cb);
					if (this.autoAbort !== false) {
						this.abort()
					}
					K.timeoutId = this.handleFailure.defer(this.timeout, this,
							[K]);
					var G = document.createElement("script");
					G.setAttribute("src", B);
					G.setAttribute("type", "text/javascript");
					G.setAttribute("id", K.scriptId);
					this.head.appendChild(G);
					this.trans = K
				} else {
					H.call(I || this, null, J, false)
				}
			},
			isLoading : function() {
				return this.trans ? true : false
			},
			abort : function() {
				if (this.isLoading()) {
					this.destroyTrans(this.trans)
				}
			},
			destroyTrans : function(B, A) {
				this.head.removeChild(document.getElementById(B.scriptId));
				clearTimeout(B.timeoutId);
				if (A) {
					window[B.cb] = undefined;
					try {
						delete window[B.cb]
					} catch (C) {
					}
				} else {
					window[B.cb] = function() {
						window[B.cb] = undefined;
						try {
							delete window[B.cb]
						} catch (D) {
						}
					}
				}
			},
			handleResponse : function(D, B) {
				this.trans = false;
				this.destroyTrans(B, true);
				var A;
				try {
					A = B.reader.readRecords(D)
				} catch (C) {
					this.fireEvent("loadexception", this, D, B.arg, C);
					B.callback.call(B.scope || window, null, B.arg, false);
					return
				}
				this.fireEvent("load", this, D, B.arg);
				B.callback.call(B.scope || window, A, B.arg, true)
			},
			handleFailure : function(A) {
				this.trans = false;
				this.destroyTrans(A, false);
				this.fireEvent("loadexception", this, null, A.arg);
				A.callback.call(A.scope || window, null, A.arg, false)
			}
		});