fix(ngmodel): fixing many keys incorrectly marking inputs as dirty

Author: jbedard

src/ng/directive/input.js

@@ -973,6 +973,10 @@ function baseInputType(scope, element, attr, ctrl, $sniffer, $browser) {
   }
 
   var listener = function(ev) {
+    if (timeout) {
+      $browser.defer.cancel(timeout);
+      timeout = null;
+    }
     if (composing) return;
     var value = element.val(),
         event = ev && ev.type;
@@ -999,11 +1003,13 @@ function baseInputType(scope, element, attr, ctrl, $sniffer, $browser) {
   } else {
     var timeout;
 
-    var deferListener = function(ev) {
+    var deferListener = function(ev, input, origValue) {
       if (!timeout) {
         timeout = $browser.defer(function() {
-          listener(ev);
           timeout = null;
+          if (!input || input.value !== origValue) {
+            listener(ev);
+          }
         });
       }
     };
@@ -1015,7 +1021,7 @@ function baseInputType(scope, element, attr, ctrl, $sniffer, $browser) {
       //    command            modifiers                   arrows
       if (key === 91 || (15 < key && key < 19) || (37 <= key && key <= 40)) return;
 
-      deferListener(event);
+      deferListener(event, this, this.value);
     });
 
     // if user modifies input value using context menu in IE, we need "paste" and "cut" events to catch it

test/ng/directive/inputSpec.js

@@ -1804,17 +1804,21 @@ describe('input', function() {
     }
   });
 
-  describe('"paste" and "cut" events', function() {
+  describe('"keydown", "paste" and "cut" events', function() {
     beforeEach(function() {
       // Force browser to report a lack of an 'input' event
       $sniffer.hasEvent = function(eventName) {
         return eventName !== 'input';
       };
     });
 
-    it('should update the model on "paste" event', function() {
+    it('should update the model on "paste" event if the input value changes', function() {
       compileInput('<input type="text" ng-model="name" name="alias" ng-change="change()" />');
 
+      browserTrigger(inputElm, 'keydown');
+      $browser.defer.flush();
+      expect(inputElm).toBePristine();
+
       inputElm.val('mark');
       browserTrigger(inputElm, 'paste');
       $browser.defer.flush();
@@ -1830,6 +1834,21 @@ describe('input', function() {
       expect(scope.name).toEqual('john');
     });
 
+    it('should cancel the delayed dirty if a change occurs', function() {
+      compileInput('<input type="text" ng-model="name" />');
+      var ctrl = inputElm.controller('ngModel');
+
+      browserTrigger(inputElm, 'keydown', {target: inputElm[0]});
+      inputElm.val('f');
+      browserTrigger(inputElm, 'change');
+      expect(inputElm).toBeDirty();
+
+      ctrl.$setPristine();
+      scope.$apply();
+
+      $browser.defer.flush();
+      expect(inputElm).toBePristine();
+    });
   });