feat(forms): expose getters for submitted, valid_submit and invalid_submit

Closes #601

Author: matsko

lib/directive/ng_control.dart

@@ -17,6 +17,7 @@ abstract class NgControl implements NgDetachAware {
   bool _invalid;
   bool _touched;
   bool _untouched;
+  bool _submit_valid;
 
   final Scope _scope;
   final NgControl _parentControl;
@@ -48,12 +49,18 @@ abstract class NgControl implements NgDetachAware {
 
   _onSubmit(bool valid) {
     if (valid) {
+      _submit_valid = true;
       element.classes..add(NG_SUBMIT_VALID_CLASS)..remove(NG_SUBMIT_INVALID_CLASS);
     } else {
+      _submit_valid = false;
       element.classes..add(NG_SUBMIT_INVALID_CLASS)..remove(NG_SUBMIT_VALID_CLASS);
     }
   }
 
+  get submitted => _submit_valid != null;
+  get valid_submit => _submit_valid == true;
+  get invalid_submit => _submit_valid == false;
+
   get name => _name;
   set name(value) {
     _name = value;
@@ -184,7 +191,8 @@ abstract class NgControl implements NgDetachAware {
 }
 
 class NgNullControl implements NgControl {
-  var _name, _dirty, _valid, _invalid, _pristine, _element, _touched, _untouched;
+  var _name, _dirty, _valid, _invalid, _submit_valid, _pristine, _element;
+  var _touched, _untouched;
   var _controls, _scope, _parentControl, _controlName;
   var errors, _controlByName;
   dom.Element element;
@@ -199,6 +207,10 @@ class NgNullControl implements NgControl {
   get name => null;
   set name(name) {}
 
+  get submitted => null;
+  get valid_submit => null;
+  get invalid_submit => null;
+
   get pristine => null;
   set pristine(value) {}
 

test/directive/ng_form_spec.dart

@@ -314,6 +314,9 @@ describe('form', () {
       Probe probe = _.rootScope.context['i'];
       var model = probe.directive(NgModel);
 
+      expect(form.submitted).toBe(false);
+      expect(form.valid_submit).toBe(false);
+      expect(form.invalid_submit).toBe(false);
       expect(form.element.classes.contains('ng-submit-invalid')).toBe(false);
       expect(form.element.classes.contains('ng-submit-valid')).toBe(false);
 
@@ -322,12 +325,18 @@ describe('form', () {
       form.element.dispatchEvent(submissionEvent);
       _.rootScope.apply();
 
+      expect(form.submitted).toBe(true);
+      expect(form.valid_submit).toBe(false);
+      expect(form.invalid_submit).toBe(true);
       expect(form.element.classes.contains('ng-submit-invalid')).toBe(true);
       expect(form.element.classes.contains('ng-submit-valid')).toBe(false);
 
       _.rootScope.apply('myModel = "man"');
       form.element.dispatchEvent(submissionEvent);
 
+      expect(form.submitted).toBe(true);
+      expect(form.valid_submit).toBe(true);
+      expect(form.invalid_submit).toBe(false);
       expect(form.element.classes.contains('ng-submit-invalid')).toBe(false);
       expect(form.element.classes.contains('ng-submit-valid')).toBe(true);
     }));