angular2/src/core/compiler/view_container.map

Angular 2 - a web framework for modern web apps

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{ListWrapper, MapWrapper, List} from 'angular2/src/facade/collection';\nimport {BaseException} from 'angular2/src/facade/lang';\nimport {Injector} from 'angular2/di';\nimport * as eiModule from 'angular2/src/core/compiler/element_injector';\nimport {isPresent, isBlank} from 'angular2/src/facade/lang';\n\nimport * as viewModule from './view';\nimport {ViewContainerRef} from 'angular2/src/render/api';\n\n/**\n * @exportedAs angular2/view\n */\nexport class ViewContainer {\n  parentView: viewModule.AppView;\n  defaultProtoView: viewModule.AppProtoView;\n  _views: List<viewModule.AppView>;\n  elementInjector: eiModule.ElementInjector;\n\n  constructor(parentView: viewModule.AppView,\n              defaultProtoView: viewModule.AppProtoView,\n              elementInjector: eiModule.ElementInjector) {\n    this.parentView = parentView;\n    this.defaultProtoView = defaultProtoView;\n    this.elementInjector = elementInjector;\n\n    // The order in this list matches the DOM order.\n    this._views = [];\n  }\n\n  getRender() {\n    return new ViewContainerRef(this.parentView.render, this.elementInjector.getBoundElementIndex());\n  }\n\n  internalClearWithoutRender() {\n    for (var i = this._views.length - 1; i >= 0; i--) {\n      this._detachInjectors(i);\n    }\n  }\n\n  clear() {\n    for (var i = this._views.length - 1; i >= 0; i--) {\n      this.remove(i);\n    }\n  }\n\n  get(index: number): viewModule.AppView {\n    return this._views[index];\n  }\n\n  get length() {\n    return this._views.length;\n  }\n\n  _siblingInjectorToLinkAfter(index: number) {\n    if (index == 0) return null;\n    return ListWrapper.last(this._views[index - 1].rootElementInjectors)\n  }\n\n  hydrated() {\n    return this.parentView.hydrated();\n  }\n\n  // TODO(rado): profile and decide whether bounds checks should be added\n  // to the methods below.\n  create(atIndex=-1, protoView:viewModule.AppProtoView = null, injector:Injector = null): viewModule.AppView {\n    if (atIndex == -1) atIndex = this._views.length;\n    if (!this.hydrated()) throw new BaseException(\n        'Cannot create views on a dehydrated ViewContainer');\n    if (isBlank(protoView)) {\n      protoView = this.defaultProtoView;\n    }\n    var newView = this.parentView.viewFactory.getView(protoView);\n    // insertion must come before hydration so that element injector trees are attached.\n    this._insertInjectors(newView, atIndex);\n    this.parentView.viewHydrator.hydrateViewInViewContainer(this, atIndex, newView, injector);\n\n    return newView;\n  }\n\n  insert(view, atIndex=-1): viewModule.AppView {\n    if (atIndex == -1) atIndex = this._views.length;\n    this._insertInjectors(view, atIndex);\n    this.parentView.changeDetector.addChild(view.changeDetector);\n    this.parentView.renderer.insertViewIntoContainer(this.getRender(), atIndex, view.render);\n    return view;\n  }\n\n  _insertInjectors(view, atIndex): viewModule.AppView {\n    ListWrapper.insert(this._views, atIndex, view);\n    this._linkElementInjectors(this._siblingInjectorToLinkAfter(atIndex), view);\n\n    return view;\n  }\n\n  indexOf(view:viewModule.AppView) {\n    return ListWrapper.indexOf(this._views, view);\n  }\n\n  remove(atIndex=-1) {\n    if (atIndex == -1) atIndex = this._views.length - 1;\n    var view = this._views[atIndex];\n    // opposite order as in create\n    this.parentView.viewHydrator.dehydrateViewInViewContainer(this, atIndex, view);\n    this._detachInjectors(atIndex);\n    this.parentView.viewFactory.returnView(view);\n    // view is intentionally not returned to the client.\n  }\n\n  /**\n   * The method can be used together with insert to implement a view move, i.e.\n   * moving the dom nodes while the directives in the view stay intact.\n   */\n  detach(atIndex=-1): viewModule.AppView {\n    if (atIndex == -1) atIndex = this._views.length - 1;\n    var detachedView = this._detachInjectors(atIndex);\n    detachedView.changeDetector.remove();\n    this.parentView.renderer.detachViewFromContainer(this.getRender(), atIndex);\n    return detachedView;\n  }\n\n  _detachInjectors(atIndex): viewModule.AppView {\n    var detachedView = this.get(atIndex);\n    ListWrapper.removeAt(this._views, atIndex);\n    this._unlinkElementInjectors(detachedView);\n    return detachedView;\n  }\n\n  _linkElementInjectors(sibling, view) {\n    for (var i = view.rootElementInjectors.length - 1; i >= 0; i--) {\n      view.rootElementInjectors[i].linkAfter(this.elementInjector, sibling);\n    }\n  }\n\n  _unlinkElementInjectors(view) {\n    for (var i = 0; i < view.rootElementInjectors.length; ++i) {\n      view.rootElementInjectors[i].unlink();\n    }\n  }\n}\n"]}