From 25a9f1165d2cfe2254739f3dbc0944aeef6f80a5 Mon Sep 17 00:00:00 2001
From: Nathan Gray <nathangray.bsc@gmail.com>
Date: Mon, 26 May 2008 14:48:32 +0000
Subject: [PATCH] Patch from Raphael Alla to prevent flooding by waiting to see
 if the user is done typing before sending request.

---
 etemplate/js/ajax_select.js | 29 +++++++++++++++++++++++++++--
 1 file changed, 27 insertions(+), 2 deletions(-)

diff --git a/etemplate/js/ajax_select.js b/etemplate/js/ajax_select.js
index 5e4696f914..f8c9fa4734 100644
--- a/etemplate/js/ajax_select.js
+++ b/etemplate/js/ajax_select.js
@@ -18,6 +18,14 @@
 //xajaxDebug = 1;
 var current_app = 'etemplate';
 
+/**
+ * Settings for the timeout to prevent flooding the server with requests
+ *
+ * Adjust ajax_select_timeout to change how long to wait before sending the request (in ms)
+ */
+var ajax_select_timer_id = 0;
+var ajax_select_timeout = 300;
+
 function ajax_select_widget_setup(widget_id, onchange, options, currentapp) {
 	current_app = currentapp;
 	if(onchange) {
@@ -47,10 +55,10 @@ function ajax_select_widget_setup(widget_id, onchange, options, currentapp) {
 
 		if(widget.addEventListener) {
 			widget.addEventListener('keydown', checkKey, true);
-			widget.addEventListener('keyup', change, false);
+			widget.addEventListener('keyup', timer_change, false);
 			widget.addEventListener('blur', hideBox, false);
 		} else {
-			widget.onkeyup = change;
+			widget.onkeyup = timer_change;
 			widget.onblur = hideBox;
 			widget.onkeydown = checkKey;
 		}
@@ -180,6 +188,23 @@ function checkKey(e, value) {
 	}
 }
 
+/**
+ * Set a timeout to prevent user from flooding the server with requests as
+ * they type.  Waits to see if the user is still typing before sending the 
+ * request.  Adjust ajax_select_timeout to change how long to wait (in ms).
+ */
+function timer_change(e, value) {
+	if ( ajax_select_timer_id != 0) {
+		clearTimeout(ajax_select_timer_id);
+	}
+	ajax_select_timer_id = setTimeout(
+		function() {
+			change(e, value);
+		}, 
+		ajax_select_timeout
+	);
+}
+
 function change(e, value) {
 	if(!e) {
 		var e = window.event;