feat(elementBinder): introduce element binder.

It is a plain-old-data class to seperate the protoInjector from the
textNodes and elementBinding data.

modules/benchmarks/src/element_injector/instantiate_benchmark.js

@@ -8,7 +8,7 @@ export function run () {
   var appInjector = new Injector([]);
 
   var bindings = [A, B, C];
-  var proto = new ProtoElementInjector(null, bindings, [], false);
+  var proto = new ProtoElementInjector(null, bindings);
   for (var i = 0; i < ITERATIONS; ++i) {
     var ei = proto.instantiate({view:null});
     ei.instantiateDirectives(appInjector);

modules/benchmarks/src/element_injector/instantiate_benchmark_codegen.js

@@ -16,7 +16,7 @@ export function run () {
     ], false)];
 
 
-  var proto = new ProtoElementInjector(null, bindings, [], false);
+  var proto = new ProtoElementInjector(null, bindings);
   for (var i = 0; i < ITERATIONS; ++i) {
     var ei = proto.instantiate({view:null});
     ei.instantiateDirectives(appInjector);
@@ -39,4 +39,4 @@ class C {
   constructor(a:A, b:B) {
     count++;
   }
-}
+}

modules/benchmarks/src/element_injector/instantiate_directive_benchmark.js

@@ -8,7 +8,7 @@ export function run () {
   var appInjector = new Injector([]);
 
   var bindings = [A, B, C];
-  var proto = new ProtoElementInjector(null, bindings, [], false);
+  var proto = new ProtoElementInjector(null, bindings);
   var ei = proto.instantiate({view:null});
 
   for (var i = 0; i < ITERATIONS; ++i) {
@@ -33,4 +33,4 @@ class C {
   constructor(a:A, b:B) {
     count++;
   }
-}
+}

modules/core/src/compiler/element_binder.js

@@ -0,0 +1,15 @@
+import {ProtoElementInjector} from './element_injector';
+import {FIELD} from 'facade/lang';
+import {List} from 'facade/collection';
+
+export class ElementBinder {
+  @FIELD('final protoElementInjector:ProtoElementInjector')
+  @FIELD('final textNodeIndices:List<int>')
+  @FIELD('final hasElementPropertyBindings:bool')
+  constructor(protoElementInjector: ProtoElementInjector,
+      textNodeIndices:List, hasElementPropertyBindings:boolean) {
+    this.protoElementInjector = protoElementInjector;  
+    this.textNodeIndices = textNodeIndices;
+    this.hasElementPropertyBindings = hasElementPropertyBindings;
+  }
+}

modules/core/src/compiler/element_injector.js

@@ -146,10 +146,7 @@ export class ProtoElementInjector extends TreeNode {
   @FIELD('_key7:int')
   @FIELD('_key8:int')
   @FIELD('_key9:int')
-  @FIELD('textNodeIndices:List<int>')
+  constructor(parent:ProtoElementInjector, bindings:List) {
-  @FIELD('hasElementPropertyBindings:bool')
-  constructor(parent:ProtoElementInjector, bindings:List, textNodeIndices:List,
-      hasElementPropertyBindings:boolean) {
     super(parent);
 
     this._elementInjector = null;
@@ -180,9 +177,6 @@ export class ProtoElementInjector extends TreeNode {
     if (length > 10) {
       throw 'Maximum number of directives per element has been reached.';
     }
-
-    this.textNodeIndices = textNodeIndices;
-    this.hasElementPropertyBindings = hasElementPropertyBindings;
   }
 
   instantiate({view}):ElementInjector {

modules/core/src/compiler/view.js

@@ -3,6 +3,7 @@ import {ListWrapper} from 'facade/collection';
 import {ProtoWatchGroup, WatchGroup, WatchGroupDispatcher} from 'change_detection/watch_group';
 import {Record} from 'change_detection/record';
 import {ProtoElementInjector, ElementInjector} from './element_injector';
+import {ElementBinder} from './element_binder';
 import {SetterFn} from 'change_detection/facade';
 import {FIELD, IMPLEMENTS, int, isPresent, isBlank} from 'facade/lang';
 import {List} from 'facade/collection';
@@ -57,19 +58,16 @@ export class View {
 
 export class ProtoView {
   @FIELD('final _template:TemplateElement')
-  @FIELD('final _bindings:List')
+  @FIELD('final _elementBinders:List<ElementBinder>')
-  @FIELD('final _protoElementInjectors:List<ProtoElementInjector>')
   @FIELD('final _protoWatchGroup:ProtoWatchGroup')
   @FIELD('final _useRootElement:bool')
   constructor(
       template:TemplateElement,
-      bindings:List,
+      elementBinders:List,
-      protoElementInjectors:List,
       protoWatchGroup:ProtoWatchGroup,
       useRootElement:boolean) {
     this._template = template;
-    this._bindings = bindings;
+    this._elementBinders = elementBinders;
-    this._protoElementInjectors = protoElementInjectors;
     this._protoWatchGroup = protoWatchGroup;
 
     // not implemented
@@ -79,31 +77,32 @@ export class ProtoView {
   instantiate(context, appInjector:Injector):View {
     var fragment = DOM.clone(this._template.content);
     var elements = DOM.querySelectorAll(fragment, ".ng-binding");
-    var protos = this._protoElementInjectors;
+    var binders = this._elementBinders;
 
     /**
      * TODO: vsavkin: benchmark
      * If this performs poorly, the five loops can be collapsed into one.
      */
-    var elementInjectors = ProtoView._createElementInjectors(elements, protos);
+    var elementInjectors = ProtoView._createElementInjectors(elements, binders);
     var rootElementInjectors = ProtoView._rootElementInjectors(elementInjectors);
-    var textNodes = ProtoView._textNodes(elements, protos);
+    var textNodes = ProtoView._textNodes(elements, binders);
-    var bindElements = ProtoView._bindElements(elements, protos);
+    var bindElements = ProtoView._bindElements(elements, binders);
     ProtoView._instantiateDirectives(elementInjectors, appInjector);
 
     return new View(fragment, elementInjectors, rootElementInjectors, textNodes,
         bindElements, this._protoWatchGroup, context);
   }
 
-  static _createElementInjectors(elements, protos) {
+  static _createElementInjectors(elements, binders) {
-    var injectors = ListWrapper.createFixedSize(protos.length);
+    var injectors = ListWrapper.createFixedSize(binders.length);
-    for (var i = 0; i < protos.length; ++i) {
+    for (var i = 0; i < binders.length; ++i) {
-      injectors[i] = ProtoView._createElementInjector(elements[i], protos[i]);
+      injectors[i] = ProtoView._createElementInjector(
+          elements[i], binders[i].protoElementInjector);
     }
     // Cannot be rolled into loop above, because parentInjector pointers need
     // to be set on the children.
-    for (var i = 0; i < protos.length; ++i) {
+    for (var i = 0; i < binders.length; ++i) {
-      protos[i].clearElementInjector();
+      binders[i].protoElementInjector.clearElementInjector();
     }
     return injectors;
   }
@@ -124,19 +123,19 @@ export class ProtoView {
     return ListWrapper.filter(injectors, inj => isPresent(inj) && isBlank(inj.parent));
   }
 
-  static _textNodes(elements, protos) {
+  static _textNodes(elements, binders) {
     var textNodes = [];
-    for (var i = 0; i < protos.length; ++i) {
+    for (var i = 0; i < binders.length; ++i) {
       ProtoView._collectTextNodes(textNodes, elements[i],
-          protos[i].textNodeIndices);
+          binders[i].textNodeIndices);
     }
     return textNodes;
   }
 
-  static _bindElements(elements, protos):List<Element> {
+  static _bindElements(elements, binders):List<Element> {
     var bindElements = [];
-    for (var i = 0; i < protos.length; ++i) {
+    for (var i = 0; i < binders.length; ++i) {
-      if (protos[i].hasElementPropertyBindings) ListWrapper.push(
+      if (binders[i].hasElementPropertyBindings) ListWrapper.push(
           bindElements, elements[i]);
     }
     return bindElements;

modules/core/test/compiler/element_injector_spec.js

@@ -70,7 +70,7 @@ export function main() {
     if (isBlank(appInjector)) appInjector = new Injector([]);
     if (isBlank(props)) props = {};
 
-    var proto = new ProtoElementInjector(null, bindings, [], false);
+    var proto = new ProtoElementInjector(null, bindings);
     var inj = proto.instantiate({view: props["view"]});
     inj.instantiateDirectives(appInjector);
     return inj;
@@ -79,12 +79,11 @@ export function main() {
   function parentChildInjectors(parentBindings, childBindings) {
     var inj = new Injector([]);
 
-    var protoParent = new ProtoElementInjector(null, parentBindings, [], false);
+    var protoParent = new ProtoElementInjector(null, parentBindings);
     var parent = protoParent.instantiate({view: null});
     parent.instantiateDirectives(inj);
 
-    var protoChild = new ProtoElementInjector(protoParent, childBindings, [],
+    var protoChild = new ProtoElementInjector(protoParent, childBindings);
-        false);
     var child = protoChild.instantiate({view: null});
     child.instantiateDirectives(inj);
 
@@ -94,9 +93,9 @@ export function main() {
   describe("ElementInjector", function () {
     describe("proto injectors", function () {
       it("should construct a proto tree", function () {
-        var p = new ProtoElementInjector(null, [], [], false);
+        var p = new ProtoElementInjector(null, []);
-        var c1 = new ProtoElementInjector(p, [], [], false);
+        var c1 = new ProtoElementInjector(p, []);
-        var c2 = new ProtoElementInjector(p, [], [], false);
+        var c2 = new ProtoElementInjector(p, []);
 
         expect(humanize(p, [
           [p, 'parent'],
@@ -108,9 +107,9 @@ export function main() {
 
     describe("instantiate", function () {
       it("should create an element injector", function () {
-        var protoParent = new ProtoElementInjector(null, [], [], false);
+        var protoParent = new ProtoElementInjector(null, []);
-        var protoChild1 = new ProtoElementInjector(protoParent, [], [], false);
+        var protoChild1 = new ProtoElementInjector(protoParent, []);
-        var protoChild2 = new ProtoElementInjector(protoParent, [], [], false);
+        var protoChild2 = new ProtoElementInjector(protoParent, []);
 
         var p = protoParent.instantiate({view: null});
         var c1 = protoChild1.instantiate({view: null});
@@ -126,12 +125,12 @@ export function main() {
 
     describe("hasBindings", function () {
       it("should be true when there are bindings", function () {
-        var p = new ProtoElementInjector(null, [Directive], [], false);
+        var p = new ProtoElementInjector(null, [Directive]);
         expect(p.hasBindings).toBeTruthy();
       });
 
       it("should be false otherwise", function () {
-        var p = new ProtoElementInjector(null, [], [], false);
+        var p = new ProtoElementInjector(null, []);
         expect(p.hasBindings).toBeFalsy();
       });
     });

modules/core/test/compiler/view_spec.js

@@ -8,6 +8,7 @@ import {DOM, Element} from 'facade/dom';
 import {FIELD} from 'facade/lang';
 import {ImplicitReceiver, FieldRead} from 'change_detection/parser/ast';
 import {ClosureMap} from 'change_detection/parser/closure_map';
+import {ElementBinder} from 'core/compiler/element_binder';
 
 class Directive {
   @FIELD('prop')
@@ -30,10 +31,15 @@ export function main() {
                '</div>' +
              '</section>';
 
-    function templateElInj() {
+    function templateElementBinders() {
-        var sectionPI = new ProtoElementInjector(null, [], [0], false);
+        var sectionPI = new ElementBinder(new ProtoElementInjector(null, []),
-        var divPI = new ProtoElementInjector(sectionPI, [Directive], [], false);
+            [0], false);
-        var spanPI = new ProtoElementInjector(divPI, [], [], true);
+
+        var divPI = new ElementBinder(new ProtoElementInjector(
+            sectionPI.protoElementInjector, [Directive]), [], false);
+
+        var spanPI = new ElementBinder(new ProtoElementInjector(
+            divPI.protoElementInjector, []), [], true);
         return [sectionPI, divPI, spanPI];
     }
 
@@ -41,9 +47,8 @@ export function main() {
       it('should create view instance and locate basic parts', function() {
         var template = DOM.createTemplate(tempalteWithThreeTypesOfBindings);
 
-        var diBindings = [];
         var hasSingleRoot = false;
-        var pv = new ProtoView(template, diBindings, templateElInj(),
+        var pv = new ProtoView(template, templateElementBinders(),
             new ProtoWatchGroup(), hasSingleRoot);
 
         var view = pv.instantiate(null, null);
@@ -68,10 +73,12 @@ export function main() {
             '<div directive class="ng-binding"></div>' +
           '</section>');
 
-        var sectionPI = new ProtoElementInjector(null, [Directive], [], false);
+        var sectionPI = new ElementBinder(new ProtoElementInjector(
-        var divPI = new ProtoElementInjector(sectionPI, [Directive], [], false);
+            null, [Directive]), [], false);
+        var divPI = new ElementBinder(new ProtoElementInjector(
+            sectionPI.protoElementInjector, [Directive]), [], false);
 
-        var pv = new ProtoView(template, [], [sectionPI, divPI],
+        var pv = new ProtoView(template, [sectionPI, divPI],
           new ProtoWatchGroup(), false);
         var view = pv.instantiate(null, null);
 
@@ -82,7 +89,7 @@ export function main() {
         var view;
         beforeEach(() => {
           var template = DOM.createTemplate(tempalteWithThreeTypesOfBindings);
-          var pv = new ProtoView(template, [], templateElInj(),
+          var pv = new ProtoView(template, templateElementBinders(),
             new ProtoWatchGroup(), false);
           view = pv.instantiate(null, null);
         });
@@ -125,7 +132,7 @@ export function main() {
           var protoWatchGroup = new ProtoWatchGroup();
           protoWatchGroup.watch(oneFieldAst('foo'), memento);
 
-          var pv = new ProtoView(template, [], templateElInj(),
+          var pv = new ProtoView(template, templateElementBinders(),
               protoWatchGroup, false);
 
           ctx = new MyEvaluationContext();