fix(autocomplete): promises that resolve immediately will work properly

Closes #3117

Author: Robert Messerle

src/components/autocomplete/js/autocompleteController.js

@@ -6,14 +6,13 @@ var ITEM_HEIGHT = 41,
     MAX_HEIGHT = 5.5 * ITEM_HEIGHT,
     MENU_PADDING = 8;
 
-function MdAutocompleteCtrl ($scope, $element, $mdUtil, $mdConstant, $timeout, $mdTheming, $window,
+function MdAutocompleteCtrl ($scope, $element, $mdUtil, $mdConstant, $mdTheming, $window,
                              $animate, $rootElement, $attrs, $q) {
   //-- private variables
   var ctrl      = this,
       itemParts = $scope.itemsExpr.split(/ in /i),
       itemExpr  = itemParts[1],
       elements  = null,
-      promise   = null,
       cache     = {},
       noBlur    = false,
       selectedItemWatchers = [],
@@ -60,7 +59,7 @@ function MdAutocompleteCtrl ($scope, $element, $mdUtil, $mdConstant, $timeout, $
     $mdUtil.initOptionalProperties($scope, $attrs, { searchText: null, selectedItem: null } );
     $mdTheming($element);
     configureWatchers();
-    $timeout(function () {
+    $mdUtil.nextTick(function () {
       gatherElements();
       focusElement();
       moveDropdown();
@@ -72,7 +71,7 @@ function MdAutocompleteCtrl ($scope, $element, $mdUtil, $mdConstant, $timeout, $
    * @returns {*}
    */
   function positionDropdown () {
-    if (!elements) return $timeout(positionDropdown, 0, false);
+    if (!elements) return $mdUtil.nextTick(positionDropdown);
     var hrect  = elements.wrap.getBoundingClientRect(),
         vrect  = elements.snap.getBoundingClientRect(),
         root   = elements.root.getBoundingClientRect(),
@@ -95,7 +94,7 @@ function MdAutocompleteCtrl ($scope, $element, $mdUtil, $mdConstant, $timeout, $
       styles.maxHeight = Math.min(MAX_HEIGHT, root.bottom - hrect.bottom - MENU_PADDING) + 'px';
     }
     elements.$.ul.css(styles);
-    $timeout(correctHorizontalAlignment, 0, false);
+    $mdUtil.nextTick(correctHorizontalAlignment);
 
     /**
      * Makes sure that the menu doesn't go off of the screen on either side.
@@ -200,11 +199,9 @@ function MdAutocompleteCtrl ($scope, $element, $mdUtil, $mdConstant, $timeout, $
   function handleHiddenChange (hidden, oldHidden) {
     if (!hidden && oldHidden) {
       positionDropdown();
-      if (elements) $timeout(function () { $mdUtil.disableScrollAround(elements.ul); }, 0, false);
+      if (elements) $mdUtil.nextTick(function () { $mdUtil.disableScrollAround(elements.ul); });
     } else if (hidden && !oldHidden) {
-      $timeout(function() {
-        $mdUtil.enableScrolling();
-      }, 0, false);
+      $mdUtil.nextTick(function() { $mdUtil.enableScrolling(); });
     }
   }
 
@@ -319,7 +316,7 @@ function MdAutocompleteCtrl ($scope, $element, $mdUtil, $mdConstant, $timeout, $
         }
       }
     });
-   
+
   }
 
   /**
@@ -478,7 +475,7 @@ function MdAutocompleteCtrl ($scope, $element, $mdUtil, $mdConstant, $timeout, $
    */
   function select(index) {
     //-- force form to update state for validation
-    $timeout(function() {
+    $mdUtil.nextTick(function() {
       getDisplayValue(ctrl.matches[index]).then(function(val) {
         var ngModel = elements.$.input.controller('ngModel');
         ngModel.$setViewValue(val);
@@ -519,16 +516,16 @@ function MdAutocompleteCtrl ($scope, $element, $mdUtil, $mdConstant, $timeout, $
     if (angular.isArray(items)) {
       handleResults(items);
     } else if (items) {
-      ctrl.loading = true;
-      if (items.success) items.success(handleResults);
-      if (items.then)    items.then(handleResults);
-      if (items.error)   items.error(function () { ctrl.loading = false; });
+      $mdUtil.nextTick(function () {
+        ctrl.loading = true;
+        if (items.success) items.success(handleResults);
+        if (items.then)    items.then(handleResults);
+        if (items.finally) items.finally(function () { ctrl.loading = false; });
+      });
     }
     function handleResults (matches) {
       cache[term] = matches;
       if (searchText !== $scope.searchText) return; //-- just cache the results if old request
-      ctrl.loading = false;
-      promise = null;
       ctrl.matches = matches;
       ctrl.hidden = shouldHide();
       updateMessages();
@@ -582,11 +579,6 @@ function MdAutocompleteCtrl ($scope, $element, $mdUtil, $mdConstant, $timeout, $
   function handleQuery () {
     var searchText = $scope.searchText,
         term = searchText.toLowerCase();
-    //-- cancel promise if a promise is in progress
-    if (promise && promise.cancel) {
-      promise.cancel();
-      promise = null;
-    }
     //-- if results are cached, pull in cached results
     if (!$scope.noCache && cache[term]) {
       ctrl.matches = cache[term];