revert: chore(core): introduce $$body service

Relying on the body node to be present right at injection has
caused issues with unit testing as well as some animations on
the body element. Reverting this patch fixes these issues.

Closes #12874

Author: matsko

angularFiles.js

@@ -92,7 +92,6 @@ var angularFiles = {
   'angularModules': {
     'ngAnimate': [
       'src/ngAnimate/shared.js',
-      'src/ngAnimate/body.js',
       'src/ngAnimate/rafScheduler.js',
       'src/ngAnimate/animateChildrenDirective.js',
       'src/ngAnimate/animateCss.js',

src/ngAnimate/animateCssDriver.js

@@ -9,13 +9,13 @@ var $$AnimateCssDriverProvider = ['$$animationProvider', function($$animationPro
   var NG_OUT_ANCHOR_CLASS_NAME = 'ng-anchor-out';
   var NG_IN_ANCHOR_CLASS_NAME = 'ng-anchor-in';
 
-  this.$get = ['$animateCss', '$rootScope', '$$AnimateRunner', '$rootElement', '$$body', '$sniffer', '$$jqLite',
-       function($animateCss,   $rootScope,   $$AnimateRunner,   $rootElement,   $$body,   $sniffer,   $$jqLite) {
+  this.$get = ['$animateCss', '$rootScope', '$$AnimateRunner', '$rootElement', '$sniffer', '$$jqLite', '$document',
+       function($animateCss,   $rootScope,   $$AnimateRunner,   $rootElement,   $sniffer,   $$jqLite,   $document) {
 
     // only browsers that support these properties can render animations
     if (!$sniffer.animations && !$sniffer.transitions) return noop;
 
-    var bodyNode = getDomNode($$body);
+    var bodyNode = $document[0].body;
     var rootNode = getDomNode($rootElement);
 
     var rootBodyElement = jqLite(bodyNode.parentNode === rootNode ? bodyNode : rootNode);

src/ngAnimate/animateQueue.js

@@ -66,9 +66,9 @@ var $$AnimateQueueProvider = ['$animateProvider', function($animateProvider) {
     return (nO.addClass && nO.addClass === cO.removeClass) || (nO.removeClass && nO.removeClass === cO.addClass);
   });
 
-  this.$get = ['$$rAF', '$rootScope', '$rootElement', '$document', '$$body', '$$HashMap',
+  this.$get = ['$$rAF', '$rootScope', '$rootElement', '$document', '$$HashMap',
                '$$animation', '$$AnimateRunner', '$templateRequest', '$$jqLite', '$$forceReflow',
-       function($$rAF,   $rootScope,   $rootElement,   $document,   $$body,   $$HashMap,
+       function($$rAF,   $rootScope,   $rootElement,   $document,   $$HashMap,
                 $$animation,   $$AnimateRunner,   $templateRequest,   $$jqLite,   $$forceReflow) {
 
     var activeAnimationsLookup = new $$HashMap();
@@ -528,7 +528,8 @@ var $$AnimateQueueProvider = ['$animateProvider', function($animateProvider) {
     }
 
     function areAnimationsAllowed(element, parentElement, event) {
-      var bodyElementDetected = isMatchingElement(element, $$body) || element[0].nodeName === 'HTML';
+      var bodyElement = jqLite($document[0].body);
+      var bodyElementDetected = isMatchingElement(element, bodyElement) || element[0].nodeName === 'HTML';
       var rootElementDetected = isMatchingElement(element, $rootElement);
       var parentAnimationDetected = false;
       var animateChildren;
@@ -584,7 +585,7 @@ var $$AnimateQueueProvider = ['$animateProvider', function($animateProvider) {
         if (!bodyElementDetected) {
           // we also need to ensure that the element is or will be apart of the body element
           // otherwise it is pointless to even issue an animation to be rendered
-          bodyElementDetected = isMatchingElement(parentElement, $$body);
+          bodyElementDetected = isMatchingElement(parentElement, bodyElement);
         }
 
         parentElement = parentElement.parent();

src/ngAnimate/body.js

@@ -2,7 +2,6 @@
 
 /* global angularAnimateModule: true,
 
-   $$BodyProvider,
    $$AnimateAsyncRunFactory,
    $$rAFSchedulerFactory,
    $$AnimateChildrenDirective,
@@ -742,8 +741,6 @@
  * Click here {@link ng.$animate to learn more about animations with `$animate`}.
  */
 angular.module('ngAnimate', [])
-  .provider('$$body', $$BodyProvider)
-
   .directive('ngAnimateChildren', $$AnimateChildrenDirective)
   .factory('$$rAFScheduler', $$rAFSchedulerFactory)
 

src/ngAnimate/module.js

@@ -468,12 +468,12 @@ describe('ngClass animations', function() {
         };
       });
     });
-    inject(function($compile, $rootScope, $browser, $rootElement, $animate, $timeout, $$body) {
+    inject(function($compile, $rootScope, $browser, $rootElement, $animate, $document) {
       $animate.enabled(true);
 
       $rootScope.val = 'crazy';
       element = angular.element('<div ng-class="val"></div>');
-      $$body.append($rootElement);
+      jqLite($document[0].body).append($rootElement);
 
       $compile(element)($rootScope);
 

test/ng/directive/ngClassSpec.js

@@ -121,7 +121,7 @@ describe("ngAnimate $$animateCssDriver", function() {
       var from, to, fromAnimation, toAnimation;
 
       beforeEach(module(function() {
-        return function($rootElement, $$body) {
+        return function($rootElement, $document) {
           from = element;
           to = jqLite('<div></div>');
           fromAnimation = { element: from, event: 'enter' };
@@ -130,7 +130,7 @@ describe("ngAnimate $$animateCssDriver", function() {
           $rootElement.append(to);
 
           // we need to do this so that style detection works
-          $$body.append($rootElement);
+          jqLite($document[0].body).append($rootElement);
         };
       }));