fix(ionNavBar): adjust has-header if ionNavBar is hidden

Fixes #927.

Author: ajoslin

js/ext/angular/src/directive/ionicNavBar.js

@@ -144,6 +144,7 @@ function($scope, $element, $attrs, $ionicViewService, $animate, $compile, $ionic
 
   this.showBar = function(show) {
     $scope.isInvisible = !show;
+    $scope.$parent.$hasHeader = !!show;
   };
 
   this.setTitle = function(title) {
@@ -290,7 +291,6 @@ function($ionicViewService, $rootScope, $animate, $compile) {
         $scope.shouldAnimate = true;
         $scope.isReverse = false;
         $scope.isInvisible = true;
-        $scope.$parent.$hasHeader = true;
 
         $scope.$on('$destroy', function() {
           $scope.$parent.$hasHeader = false;

js/ext/angular/test/directive/ionicNavBar.unit.js

@@ -74,7 +74,7 @@ describe('ionNavBar', function() {
       expect($scope.backButtonShown).toBe(false);
     });
 
-    it('should showBar', function() {
+    it('showBar should set isInvisible', function() {
       var ctrl = setup();
       expect($scope.isInvisible).toBeUndefined();
       ctrl.showBar(true);
@@ -83,6 +83,15 @@ describe('ionNavBar', function() {
       expect($scope.isInvisible).toBe(true);
     });
 
+    it('showBar should set $parent.$hasHeader', function() {
+      var ctrl = setup();
+      expect($scope.$parent.$hasHeader).toBeUndefined();
+      ctrl.showBar(true);
+      expect($scope.$parent.$hasHeader).toBe(true);
+      ctrl.showBar(false);
+      expect($scope.$parent.$hasHeader).toBe(false);
+    });
+
     it('should setTitle', function() {
       var ctrl = setup();
       expect($scope.title).toBeFalsy();
@@ -230,10 +239,10 @@ describe('ionNavBar', function() {
       expect(el.children().eq(0).html()).toBe('<b>super</b> content 4');
     });
 
-    it('should $parent.$hasHeader and unset on $destroy', function() {
+    it('should set $parent.$hasHeader to false on $scope.$destroy', function() {
       var el = setup();
       var parentScope = el.scope().$parent;
-      expect(parentScope.$hasHeader).toBe(true);
+      parentScope.$hasHeader = true;
       el.scope().$destroy();
       expect(parentScope.$hasHeader).toBe(false);
     });
@@ -255,6 +264,7 @@ describe('ionNavBar', function() {
 
     it('should have invisible class (default true)', function() {
       var el = setup();
+      el.scope().$apply();
       expect(el.hasClass('invisible')).toBe(true);
       el.scope().$apply('isInvisible = false');
       expect(el.hasClass('invisible')).toBe(false);