From 517e568e5abd07e0d898af523953b539db004b23 Mon Sep 17 00:00:00 2001
From: Shamim Rezaie <shamim@moodle.com>
Date: Mon, 23 Mar 2020 23:29:21 +1100
Subject: [PATCH] MDL-68196 core: not expand autocomplete elements too soon on
 IE

---
 lib/amd/build/form-autocomplete.min.js     | Bin 11333 -> 11568 bytes
 lib/amd/build/form-autocomplete.min.js.map | Bin 75824 -> 77134 bytes
 lib/amd/src/form-autocomplete.js           |  16 +++++++++++++++-
 3 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/lib/amd/build/form-autocomplete.min.js b/lib/amd/build/form-autocomplete.min.js
index 7de1001e137579569f611b2bb2af0f8af4b656af..9c07fddfb906052b405e765a374c41f268a939ea 100644
GIT binary patch
delta 272
zcmXYsPfEi;97YKi>87}_MT8<|CY2c&hPn=OgSzWNbRm<;pH7-gB$;UzAxls2yGX?|
zxDq^sC-4X+)b-<geDCw|_;lQ$S;i|vP+BS1AO`Q#Im{MUXOcuf0{@&T+S3p=Xf@x_
z?jY-1EsQG)mJ9!$?cojit3ssCD60pLq}_>!17C+Nkt|}0#cT&(Xz6MA4HlC<?Q`%j
z_exk}|3=eLrz9Vjtu}Gh@+PrcT_%;Yq=X6w*P3<@+*w`lym@&|Osq{t291VijNltz
uj=z@?SFWxTW4E%-5=;3(7KE}`oMP@SVqXYFyOKn-{|}sufge9uP5%I>gIEUu

delta 221
zcmdlGbu?mwkJ99IN~$7>n$=~AMG6_Vd8IiyI+?bLhB{f3pDQV<X4|Hf<|UV8=I3do
zYgR+#t%33e*5w-MI!QXoIw?AdlXaD47&9hc&=F<H(yYy#oUE)j*`1Y7t~@g@CBIxR
zIVUx-C?qpCHNUh(BSX_VGfg8CXx3yt6{X4dmBsusG^>5}N=q_x^s<WM3sUn^GV{_k
zfCgpQLJcTRErDsz)=L5!s!@`WS*(+&sbg$lpjm63t_O6UQf6L3X^E0f&gQc!$s7P1
Ch)f*-

diff --git a/lib/amd/build/form-autocomplete.min.js.map b/lib/amd/build/form-autocomplete.min.js.map
index 98beddaaaddd33a7bcd6ccda11ab27cea9e393f9..72d5f1b0de5afe4a41e6faed99904e632c65a2fb 100644
GIT binary patch
delta 461
zcmdmRf#uvSmJI@-Oy;hWFGna(&h?g=924or=@_Ns?C9)h>OQ$3QhoA+Nb$)lqlEc9
zTy$I=eI0e&9UVQZTsDh`-e(5t5Sknwxs1_s^1nzmMH5$`KF4$?5b12{45C~>Cgp)d
zoL#Cskj+yI0?7q?0Erw|Um%(58U`c_TwQcL9rIoNfox}w0w<`$gf@pqRx)zsnK+e#
zv>BOfz7>_v$YpE_;hULm4vrDyW6H|foSmgM!7I2VzbI9qBqLR!EHS4vRUtnO%t^~k
z%}G&6ELO-YDOSiyEG~ga>nN0Gq~;;1NKeenD^^I$PcAK<?6XQ{x&j9y3oC>h@I`KN
z!y1;!34d88^B&WlUdO@6G2N1z(R%Xwlfs+(erfYgSLR^UnS5adiW(l6!1O*2M(4=~
zF0)U+!oip`IpGJ#^c7r;+F<E3e>pf)JQDL#a#D*lCMULt0!29{Z>SRn(I89g!OG^H
Y6`efqtl;GO15%Se9N^s!be(_#0I;&8E&u=k

delta 170
zcmX?ii)F(FmJI@->^km_j-ELloBxO2XVxip(s6cltOAkF9zep-#TQ5#xr6~pQx_K<
zPe&6Mf3ReR`{dn`w<jCKT;?h=b}DrN3Yr;j=8er~<T5vb@U=}gx5bI^G38}$o|mIG
zVe*3~ESn$xRpFJ6QOe9KC@qOm(orbMD9SG>$w^J|NX$#gNiCXecwS^O|9ip7{cG8`
K%keTAC;$K%&pMX?

diff --git a/lib/amd/src/form-autocomplete.js b/lib/amd/src/form-autocomplete.js
index 2cffd175e61..4738bb6e48e 100644
--- a/lib/amd/src/form-autocomplete.js
+++ b/lib/amd/src/form-autocomplete.js
@@ -834,6 +834,12 @@ function($, log, str, templates, notification, LoadingIcon) {
         });
         // Whenever the input field changes, update the suggestion list.
         if (options.showSuggestions) {
+            // Store the value of the field as its last value, when the field gains focus.
+            inputElement.on('focus', function(e) {
+                var query = $(e.currentTarget).val();
+                $(e.currentTarget).data('last-value', query);
+            });
+
             // If this field uses ajax, set it up.
             if (options.ajax) {
                 require([options.ajax], function(ajaxHandler) {
@@ -893,7 +899,15 @@ function($, log, str, templates, notification, LoadingIcon) {
                     };
 
                     // Trigger an ajax update after the text field value changes.
-                    inputElement.on("input", throttledHandler);
+                    inputElement.on('input', function(e) {
+                        var query = $(e.currentTarget).val();
+                        var last = $(e.currentTarget).data('last-value');
+                        // IE11 fires many more input events than required - even when the value has not changed.
+                        if (last !== query) {
+                            throttledHandler(e);
+                        }
+                        $(e.currentTarget).data('last-value', query);
+                    });
                 });
             } else {
                 inputElement.on('input', function(e) {
-- 
2.17.1