bee4b1ad08d8ccff393caacaf9812b86714e2281
angie
  Thu Apr 7 14:42:39 2016 -0700
Extended jquery-ui's autocomplete by adding new options enterSelectsIdentical and enterTerm,
so that when the user hits Enter in the text input, instead of ignoring it we can select a
menu item whose value is equal to the term and/or invoke a callback (enterTerm) so the app
can react to the Enter key in its own way.  There are only additions to jquery-ui's code,
no changes to existing behavior unless the new options are passed in.

diff --git src/hg/js/jquery-ui.js src/hg/js/jquery-ui.js
index 7093aa3..bf97d29 100644
--- src/hg/js/jquery-ui.js
+++ src/hg/js/jquery-ui.js
@@ -1,24 +1,53 @@
 /*!
  * jQuery UI 1.8.10
  *
  * Copyright 2011, AUTHORS.txt (http://jqueryui.com/about)
  * Dual licensed under the MIT or GPL Version 2 licenses.
  * http://jquery.org/license
  *
  * http://docs.jquery.com/UI
  */
+
+/* BEGIN ADDED BY UCSC */
+// Copyright (C) 2014 The Regents of the University of California
+
+function jqueryUiAutocompleteEnterHack(ui, event) {
+    // JQuery UI Autocomplete ignores the Enter key unless a menu item is active.
+    // This addition offers a couple specialized behaviors when the Enter key is hit
+    // but the focus is still on the text input (e.g. user typed a term and hit Enter).
+    if (ui.options.enterSelectsIdentical) {
+        // If the user's search term ui.term is case-insensitive identical to a current
+        // menu item's value, select that item.  If there is not an exact match, ignore Enter.
+        ui.menu.element.children()
+            .each(function(ix, k) {
+                var $k = $(k), data = $k.data("item.autocomplete");
+                if (data && data.value &&
+                    ui.element.val().toUpperCase() === data.value.toUpperCase()) {
+                    ui.menu.active = $k;
+                    ui.menu.select(event);
+                    ui.menu.deactivate();
+                    return false;
+                }
+            });
+    }
+    if (jQuery.isFunction(ui.options.enterTerm)) {
+        // If a callback is provided, call it.
+        ui.options.enterTerm(event, ui);
+    }
+}
+/* END ADDED BY UCSC */
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@@ -219,32 +248,32 @@
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 "string"){f=this.options.source;this.source=function(a,c){e.xhr&&e.xhr.abort();e.xhr=b.ajax({url:f,data:a,dataType:"json",autocompleteRequest:++d,success:function(h){this.autocompleteRequest===d&&c(h)},error:function(){this.autocompleteRequest===d&&c([])}})}}else this.source=this.options.source},search:function(e,g){e=e!=null?e:this.element.val();this.term=this.element.val();if(e.length<this.options.minLength)return this.close(g);clearTimeout(this.closing);if(this._trigger("search",g)!==false)return this._search(e)},
 _search:function(e){this.pending++;this.element.addClass("ui-autocomplete-loading");this.source({term:e},this.response)},_response:function(e){if(!this.options.disabled&&e&&e.length){e=this._normalize(e);this._suggest(e);this._trigger("open")}else this.close();this.pending--;this.pending||this.element.removeClass("ui-autocomplete-loading")},close:function(e){clearTimeout(this.closing);if(this.menu.element.is(":visible")){this.menu.element.hide();this.menu.deactivate();this._trigger("close",e)}},_change:function(e){this.previous!==
 this.element.val()&&this._trigger("change",e,{item:this.selectedItem})},_normalize:function(e){if(e.length&&e[0].label&&e[0].value)return e;return b.map(e,function(g){if(typeof g==="string")return{label:g,value:g};return b.extend({label:g.label||g.value,value:g.value||g.label},g)})},_suggest:function(e){var g=this.menu.element.empty().zIndex(this.element.zIndex()+1);this._renderMenu(g,e);this.menu.deactivate();this.menu.refresh();g.show();this._resizeMenu();g.position(b.extend({of:this.element},this.options.position))},
 _resizeMenu:function(){var e=this.menu.element;e.outerWidth(Math.max(e.width("").outerWidth(),this.element.outerWidth()))},_renderMenu:function(e,g){var f=this;b.each(g,function(a,c){f._renderItem(e,c)})},_renderItem:function(e,g){return b("<li></li>").data("item.autocomplete",g).append(b("<a></a>").text(g.label)).appendTo(e)},_move:function(e,g){if(this.menu.element.is(":visible"))if(this.menu.first()&&/^previous/.test(e)||this.menu.last()&&/^next/.test(e)){this.element.val(this.term);this.menu.deactivate()}else this.menu[e](g);
 else this.search(null,g)},widget:function(){return this.menu.element}});b.extend(b.ui.autocomplete,{escapeRegex:function(e){return e.replace(/[-[\]{}()*+?.,\\^$|#\s]/g,"\\$&")},filter:function(e,g){var f=new RegExp(b.ui.autocomplete.escapeRegex(g),"i");return b.grep(e,function(a){return f.test(a.label||a.value||a)})}})})(jQuery);
 (function(b){b.widget("ui.menu",{_create:function(){var d=this;this.element.addClass("ui-menu ui-widget ui-widget-content ui-corner-all").attr({role:"listbox","aria-activedescendant":"ui-active-menuitem"}).click(function(e){if(b(e.target).closest(".ui-menu-item a").length){e.preventDefault();d.select(e)}});this.refresh()},refresh:function(){var d=this;this.element.children("li:not(.ui-menu-item):has(a)").addClass("ui-menu-item").attr("role","menuitem").children("a").addClass("ui-corner-all").attr("tabindex",
 -1).mouseenter(function(e){d.activate(e,b(this).parent())}).mouseleave(function(){d.deactivate()})},activate:function(d,e){this.deactivate();if(this.hasScroll()){var g=e.offset().top-this.element.offset().top,f=this.element.attr("scrollTop"),a=this.element.height();if(g<0)this.element.attr("scrollTop",f+g);else g>=a&&this.element.attr("scrollTop",f+g-a+e.height())}this.active=e.eq(0).children("a").addClass("ui-state-hover").attr("id","ui-active-menuitem").end();this._trigger("focus",d,{item:e})},
 deactivate:function(){if(this.active){this.active.children("a").removeClass("ui-state-hover").removeAttr("id");this._trigger("blur");this.active=null}},next:function(d){this.move("next",".ui-menu-item:first",d)},previous:function(d){this.move("prev",".ui-menu-item:last",d)},first:function(){return this.active&&!this.active.prevAll(".ui-menu-item").length},last:function(){return this.active&&!this.active.nextAll(".ui-menu-item").length},move:function(d,e,g){if(this.active){d=this.active[d+"All"](".ui-menu-item").eq(0);
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 f)}else this.activate(d,this.element.children(".ui-menu-item").filter(!this.active||this.last()?":first":":last"))},previousPage:function(d){if(this.hasScroll())if(!this.active||this.first())this.activate(d,this.element.children(".ui-menu-item:last"));else{var e=this.active.offset().top,g=this.element.height();result=this.element.children(".ui-menu-item").filter(function(){var f=b(this).offset().top-e+g-b(this).height();return f<10&&f>-10});result.length||(result=this.element.children(".ui-menu-item:first"));
 this.activate(d,result)}else this.activate(d,this.element.children(".ui-menu-item").filter(!this.active||this.first()?":last":":first"))},hasScroll:function(){return this.element.height()<this.element.attr("scrollHeight")},select:function(d){this._trigger("selected",d,{item:this.active})}})})(jQuery);