From e3e27bb0668c6ecf4f1eed7a5aecf8b5048894b0 Mon Sep 17 00:00:00 2001
From: Tomas Kirda <tomas@devbridge.com>
Date: Fri, 7 Jun 2013 19:21:24 -0500
Subject: [PATCH] Implement selection invalidation.

---
 scripts/demo.js            |  3 +++
 src/jquery.autocomplete.js | 11 +++++++++--
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/scripts/demo.js b/scripts/demo.js
index b49d4b2..cab945c 100644
--- a/scripts/demo.js
+++ b/scripts/demo.js
@@ -47,6 +47,9 @@ $(function () {
             },
             onHint: function (hint) {
                 $('#autocomplete-ajax-x').val(hint);
+            },
+            onInvalidateSelection: function() {
+                $('#selction-ajax').html('You selected: none');
             }
         });
 
diff --git a/src/jquery.autocomplete.js b/src/jquery.autocomplete.js
index 887a0f8..75a4fa6 100644
--- a/src/jquery.autocomplete.js
+++ b/src/jquery.autocomplete.js
@@ -100,6 +100,7 @@
         };
         that.hint = null;
         that.hintValue = '';
+        that.selection = null;
 
         // Initialize and set options:
         that.initialize();
@@ -178,6 +179,7 @@
             that.el.on('keyup.autocomplete', function (e) { that.onKeyUp(e); });
             that.el.on('blur.autocomplete', function () { that.onBlur(); });
             that.el.on('focus.autocomplete', function () { that.fixPosition(); });
+            that.el.on('change.autocomplete', function (e) { that.onKeyUp(e); });
         },
 
         onBlur: function () {
@@ -347,11 +349,10 @@
                     return;
             }
 
-            that.findBestHint();
-
             clearInterval(that.onChangeInterval);
 
             if (that.currentValue !== that.el.val()) {
+                that.findBestHint();
                 if (that.options.deferRequestBy > 0) {
                     // Defer lookup in case when value changes very quickly:
                     that.onChangeInterval = setInterval(function () {
@@ -367,6 +368,11 @@
             var that = this,
                 q;
 
+            if (that.selection) {
+                that.selection = null;
+                (that.options.onInvalidateSelection || $.noop)();
+            }
+
             clearInterval(that.onChangeInterval);
             that.currentValue = that.el.val();
 
@@ -654,6 +660,7 @@
             that.el.val(that.currentValue);
             that.signalHint(null);
             that.suggestions = [];
+            that.selection = suggestion;
 
             if ($.isFunction(onSelectCallback)) {
                 onSelectCallback.call(that.element, suggestion);