angular-cn/modules/angular2/src/render/dom/view/proto_view.js

import {isPresent} from 'angular2/src/facade/lang';
import {DOM} from 'angular2/src/dom/dom_adapter';

import {List, Map, ListWrapper, MapWrapper} from 'angular2/src/facade/collection';

import {ElementBinder} from './element_binder';
import {NG_BINDING_CLASS} from '../util';

/**
 * Note: Code that uses this class assumes that is immutable!
 */
export class ProtoView {
  element;
  elementBinders:List<ElementBinder>;
  isTemplateElement:boolean;
  isRootView:boolean;
  rootBindingOffset:int;

  constructor({
    elementBinders,
    element,
    isRootView
  }) {
    this.element = element;
    this.elementBinders = elementBinders;
    this.isTemplateElement = DOM.isTemplateElement(this.element);
    this.isRootView = isRootView;
    this.rootBindingOffset = (isPresent(this.element) && DOM.hasClass(this.element, NG_BINDING_CLASS)) ? 1 : 0;
  }

  mergeChildComponentProtoViews(protoViews:List<ProtoView>, target:List<ProtoView>):ProtoView {
    var elementBinders = ListWrapper.createFixedSize(this.elementBinders.length);
    for (var i=0; i<this.elementBinders.length; i++) {
      var eb = this.elementBinders[i];
      if (isPresent(eb.componentId) || isPresent(eb.nestedProtoView)) {
        elementBinders[i] = eb.mergeChildComponentProtoViews(protoViews, target);
      } else {
        elementBinders[i] = eb;
      }
    }
    var result = new ProtoView({
      elementBinders: elementBinders,
      element: this.element,
      isRootView: this.isRootView
    });
    ListWrapper.insert(target, 0, result);
    return result
  }
}