angular2/src/core/compiler/dynamic_component_loader.map

Angular 2 - a web framework for modern web apps

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{Key, Injector, Injectable, ResolvedBinding} from 'angular2/di'\nimport {Compiler} from './compiler';\nimport {DirectiveMetadataReader} from './directive_metadata_reader';\nimport {Type, BaseException, stringify, isPresent} from 'angular2/src/facade/lang';\nimport {Promise} from 'angular2/src/facade/async';\nimport {Component} from 'angular2/src/core/annotations/annotations';\nimport {ViewFactory} from 'angular2/src/core/compiler/view_factory';\nimport {AppViewHydrator} from 'angular2/src/core/compiler/view_hydrator';\nimport {ElementRef, DirectiveBinding} from './element_injector';\nimport {AppView} from './view';\n\n/**\n * @exportedAs angular2/view\n */\nexport class ComponentRef {\n  location:ElementRef;\n  instance:any;\n  componentView:AppView;\n  _dispose:Function;\n\n  constructor(location:ElementRef, instance:any, componentView:AppView, dispose:Function){\n    this.location = location;\n    this.instance = instance;\n    this.componentView = componentView;\n    this._dispose = dispose;\n  }\n\n  get injector() {\n    return this.location.injector;\n  }\n\n  get hostView() {\n    return this.location.hostView;\n  }\n\n  dispose() {\n    this._dispose();\n  }\n}\n\n/**\n * Service for dynamically loading a Component into an arbitrary position in the internal Angular\n * application tree.\n *\n * @exportedAs angular2/view\n */\n@Injectable()\nexport class DynamicComponentLoader {\n  _compiler:Compiler;\n  _viewFactory:ViewFactory;\n  _viewHydrator:AppViewHydrator;\n  _directiveMetadataReader:DirectiveMetadataReader;\n\n  constructor(compiler:Compiler, directiveMetadataReader:DirectiveMetadataReader,\n              viewFactory:ViewFactory, viewHydrator:AppViewHydrator) {\n    this._compiler = compiler;\n    this._directiveMetadataReader = directiveMetadataReader;\n    this._viewFactory = viewFactory;\n    this._viewHydrator = viewHydrator;\n  }\n\n  /**\n   * Loads a component into the location given by the provided ElementRef. The loaded component\n   * receives injection as if it in the place of the provided ElementRef.\n   */\n  loadIntoExistingLocation(type:Type, location:ElementRef, injector:Injector = null):Promise<ComponentRef> {\n    this._assertTypeIsComponent(type);\n    var annotation = this._directiveMetadataReader.read(type).annotation;\n    var componentBinding = DirectiveBinding.createFromType(type, annotation);\n\n    return this._compiler.compile(type).then(componentProtoView => {\n      var componentView = this._viewFactory.getView(componentProtoView);\n      this._viewHydrator.hydrateDynamicComponentView(\n        location, componentView, componentBinding, injector);\n\n      var dispose = () => {throw new BaseException(\"Not implemented\");};\n      return new ComponentRef(location, location.elementInjector.getDynamicallyLoadedComponent(), componentView, dispose);\n    });\n  }\n\n  /**\n   * Loads a component in the element specified by elementOrSelector. The loaded component receives\n   * injection normally as a hosted view.\n   */\n  loadIntoNewLocation(type:Type, parentComponentLocation:ElementRef, elementOrSelector:any,\n                      injector:Injector = null):Promise<ComponentRef> {\n    this._assertTypeIsComponent(type);\n\n    return  this._compiler.compileInHost(type).then(hostProtoView => {\n      var hostView = this._viewFactory.getView(hostProtoView);\n      this._viewHydrator.hydrateInPlaceHostView(\n        parentComponentLocation, elementOrSelector, hostView, injector\n      );\n\n      var newLocation = hostView.elementInjectors[0].getElementRef();\n      var component = hostView.elementInjectors[0].getComponent();\n      var dispose = () => {\n        this._viewHydrator.dehydrateInPlaceHostView(parentComponentLocation, hostView);\n        this._viewFactory.returnView(hostView);\n      };\n      return new ComponentRef(newLocation, component, hostView.componentChildViews[0], dispose);\n    });\n  }\n\n  /**\n   * Loads a component next to the provided ElementRef. The loaded component receives\n   * injection normally as a hosted view.\n   */\n  loadNextToExistingLocation(type:Type, location:ElementRef, injector:Injector = null):Promise<ComponentRef> {\n    this._assertTypeIsComponent(type);\n\n    return this._compiler.compileInHost(type).then(hostProtoView => {\n      var hostView = location.viewContainer.create(-1, hostProtoView, injector);\n\n      var newLocation = hostView.elementInjectors[0].getElementRef();\n      var component = hostView.elementInjectors[0].getComponent();\n      var dispose = () => {\n        var index = location.viewContainer.indexOf(hostView);\n        location.viewContainer.remove(index);\n      };\n      return new ComponentRef(newLocation, component, hostView.componentChildViews[0], dispose);\n    });\n  }\n\n  /** Asserts that the type being dynamically instantiated is a Component. */\n  _assertTypeIsComponent(type:Type) {\n    var annotation = this._directiveMetadataReader.read(type).annotation;\n    if (!(annotation instanceof Component)) {\n      throw new BaseException(`Could not load '${stringify(type)}' because it is not a component.`);\n    }\n  }\n}\n"]}