fix($compile): relax the restriction that directives can not add siblings

Relax the restriction that directives can not add siblings

Author: mhevery

src/ng/compiler.js

@@ -350,7 +350,7 @@ function $CompileProvider($provide) {
      var linkingFns = [],
          directiveLinkingFn, childLinkingFn, directives, attrs, linkingFnFound;
 
-     for(var i = 0, ii = nodeList.length; i < ii; i++) {
+     for(var i = 0; i < nodeList.length; i++) {
        attrs = new Attributes();
 
        // we must always refer to nodeList[i] since the nodes can be replaced underneath us.
@@ -374,10 +374,6 @@ function $CompileProvider($provide) {
      return linkingFnFound ? linkingFn : null;
 
      /* nodesetLinkingFn */ function linkingFn(scope, nodeList, rootElement, boundTranscludeFn) {
-       if (linkingFns.length != nodeList.length * 2) {
-         throw Error('Template changed structure!');
-       }
-
        var childLinkingFn, directiveLinkingFn, node, childScope, childTransclusionFn;
 
        for(var i=0, n=0, ii=linkingFns.length; i<ii; n++) {

test/ng/compilerSpec.js

@@ -242,16 +242,39 @@ describe('$compile', function() {
       });
 
 
-      it('should prevent changing of structure', inject(
-        function($compile, $rootScope){
-          element = jqLite("<div><div log></div></div>");
-          var linkFn = $compile(element);
-          element.append("<div></div>");
-          expect(function() {
-            linkFn($rootScope);
-          }).toThrow('Template changed structure!');
-        }
-      ));
+      it('should allow changing the template structure after the current node', function() {
+        module(function($compileProvider){
+          $compileProvider.directive('after', valueFn({
+            compile: function(element) {
+              element.after('<span log>B</span>');
+            }
+          }));
+        });
+        inject(function($compile, $rootScope, log){
+          element = jqLite("<div><div after>A</div></div>");
+          $compile(element)($rootScope);
+          expect(element.text()).toBe('AB');
+          expect(log).toEqual('LOG');
+        });
+      });
+
+
+      it('should allow changing the template structure after the current node inside ngRepeat', function() {
+        module(function($compileProvider){
+          $compileProvider.directive('after', valueFn({
+            compile: function(element) {
+              element.after('<span log>B</span>');
+            }
+          }));
+        });
+        inject(function($compile, $rootScope, log){
+          element = jqLite('<div><div ng-repeat="i in [1,2]"><div after>A</div></div></div>');
+          $compile(element)($rootScope);
+          $rootScope.$digest();
+          expect(element.text()).toBe('ABAB');
+          expect(log).toEqual('LOG; LOG');
+        });
+      });
     });
 
     describe('compiler control', function() {