From 937e49fbf16c75365224e7cd8a92472d9f7db738 Mon Sep 17 00:00:00 2001
From: Chenyu Zhang <chenyuzhcy@gmail.com>
Date: Fri, 30 Oct 2015 11:27:29 -0400
Subject: [PATCH] feat(typeahead): display all items when focus with
 min-length=0

---
 src/typeahead/test/typeahead.spec.js |  8 ++++++++
 src/typeahead/typeahead.js           | 10 +++++++++-
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/src/typeahead/test/typeahead.spec.js b/src/typeahead/test/typeahead.spec.js
index 55d34a1568..547a44b5be 100644
--- a/src/typeahead/test/typeahead.spec.js
+++ b/src/typeahead/test/typeahead.spec.js
@@ -1204,6 +1204,14 @@ describe('typeahead tests', function() {
       changeInputValueTo(element, '');
       expect(element).toBeOpenWithActive(3, 0);
     });
+
+    it('should open typeahead when input is focused and value is empty if defined threshold is 0', function () {
+      var element = prepareInputEl('<div><input ng-model="result" uib-typeahead="item for item in source | filter:$viewValue" typeahead-min-length="0"></div>');
+      var inputEl = findInput(element);
+      inputEl.focus();
+      $scope.$digest();
+      expect(element).toBeOpenWithActive(3, 0);
+    });
   });
 
   describe('event listeners', function() {
diff --git a/src/typeahead/typeahead.js b/src/typeahead/typeahead.js
index e94635858d..1ed9cedd54 100644
--- a/src/typeahead/typeahead.js
+++ b/src/typeahead/typeahead.js
@@ -385,6 +385,13 @@ angular.module('ui.bootstrap.typeahead', ['ui.bootstrap.position'])
       }
     });
 
+    element.bind('focus', function () {
+      hasFocus = true;
+      if (minLength === 0 && !modelCtrl.$viewValue) {
+        getMatchesAsync(modelCtrl.$viewValue);
+      }
+    });
+
     element.bind('blur', function() {
       if (isSelectOnBlur && scope.matches.length && scope.activeIdx !== -1 && !selected) {
         selected = true;
@@ -393,7 +400,8 @@ angular.module('ui.bootstrap.typeahead', ['ui.bootstrap.position'])
         });
       }
       if (!isEditable && modelCtrl.$error.editable) {
-          element.val('');
+        modelCtrl.$viewValue = '';
+        element.val('');
       }
       hasFocus = false;
       selected = false;