angular2
Version:
Angular 2 - a web framework for modern web apps
88 lines • 16.7 kB
JavaScript
import { ListWrapper } from 'angular2/src/facade/collection';
import { unimplemented } from 'angular2/src/facade/exceptions';
import { isPresent } from 'angular2/src/facade/lang';
import { internalView } from './view_ref';
/**
* Represents a container where one or more Views can be attached.
*
* The container can contain two kinds of Views. Host Views, created by instantiating a
* {@link Component} via {@link #createHostView}, and Embedded Views, created by instantiating an
* {@link TemplateRef Embedded Template} via {@link #createEmbeddedView}.
*
* The location of the View Container within the containing View is specified by the Anchor
* `element`. Each View Container can have only one Anchor Element and each Anchor Element can only
* have a single View Container.
*
* Root elements of Views attached to this container become siblings of the Anchor Element in
* the Rendered View.
*
* To access a `ViewContainerRef` of an Element, you can either place a {@link Directive} injected
* with `ViewContainerRef` on the Element, or you obtain it via
* {@link AppViewManager#getViewContainer}.
*
* <!-- TODO(i): we are also considering ElementRef#viewContainer api -->
*/
export class ViewContainerRef {
/**
* Destroys all Views in this container.
*/
clear() {
for (var i = this.length - 1; i >= 0; i--) {
this.remove(i);
}
}
/**
* Returns the number of Views currently attached to this container.
*/
get length() { return unimplemented(); }
;
}
export class ViewContainerRef_ extends ViewContainerRef {
constructor(viewManager, element) {
super();
this.viewManager = viewManager;
this.element = element;
}
_getViews() {
let element = this.element;
var vc = internalView(element.parentView).viewContainers[element.boundElementIndex];
return isPresent(vc) ? vc.views : [];
}
get(index) { return this._getViews()[index].ref; }
get length() { return this._getViews().length; }
// TODO(rado): profile and decide whether bounds checks should be added
// to the methods below.
createEmbeddedView(templateRef, index = -1) {
if (index == -1)
index = this.length;
return this.viewManager.createEmbeddedViewInContainer(this.element, index, templateRef);
}
createHostView(protoViewRef = null, index = -1, dynamicallyCreatedProviders = null) {
if (index == -1)
index = this.length;
return this.viewManager.createHostViewInContainer(this.element, index, protoViewRef, dynamicallyCreatedProviders);
}
// TODO(i): refactor insert+remove into move
insert(viewRef, index = -1) {
if (index == -1)
index = this.length;
return this.viewManager.attachViewInContainer(this.element, index, viewRef);
}
indexOf(viewRef) {
return ListWrapper.indexOf(this._getViews(), internalView(viewRef));
}
// TODO(i): rename to destroy
remove(index = -1) {
if (index == -1)
index = this.length - 1;
this.viewManager.destroyViewInContainer(this.element, index);
// view is intentionally not returned to the client.
}
// TODO(i): refactor insert+remove into move
detach(index = -1) {
if (index == -1)
index = this.length - 1;
return this.viewManager.detachViewInContainer(this.element, index);
}
}
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Host Views, created by instantiating a\n * {@link Component} via {@link #createHostView}, and Embedded Views, created by instantiating an\n * {@link TemplateRef Embedded Template} via {@link #createEmbeddedView}.\n *\n * The location of the View Container within the containing View is specified by the Anchor\n * `element`. Each View Container can have only one Anchor Element and each Anchor Element can only\n * have a single View Container.\n *\n * Root elements of Views attached to this container become siblings of the Anchor Element in\n * the Rendered View.\n *\n * To access a `ViewContainerRef` of an Element, you can either place a {@link Directive} injected\n * with `ViewContainerRef` on the Element, or you obtain it via\n * {@link AppViewManager#getViewContainer}.\n *\n * <!-- TODO(i): we are also considering ElementRef#viewContainer api -->\n */\nexport abstract class ViewContainerRef {\n  /**\n   * Anchor element that specifies the location of this container in the containing View.\n   * <!-- TODO: rename to anchorElement -->\n   */\n  public element: ElementRef;\n\n  /**\n   * Destroys all Views in this container.\n   */\n  clear(): void {\n    for (var i = this.length - 1; i >= 0; i--) {\n      this.remove(i);\n    }\n  }\n\n  /**\n   * Returns the {@link ViewRef} for the View located in this container at the specified index.\n   */\n  abstract get(index: number): ViewRef;\n\n  /**\n   * Returns the number of Views currently attached to this container.\n   */\n  get length(): number { return unimplemented(); };\n\n  /**\n   * Instantiates an Embedded View based on the {@link TemplateRef `templateRef`} and inserts it\n   * into this container at the specified `index`.\n   *\n   * If `index` is not specified, the new View will be inserted as the last View in the container.\n   *\n   * Returns the {@link ViewRef} for the newly created View.\n   */\n  abstract createEmbeddedView(templateRef: TemplateRef, index?: number): ViewRef;\n\n  /**\n   * Instantiates a single {@link Component} and inserts its Host View into this container at the\n   * specified `index`.\n   *\n   * The component is instantiated using its {@link ProtoViewRef `protoView`} which can be\n   * obtained via {@link Compiler#compileInHost}.\n   *\n   * If `index` is not specified, the new View will be inserted as the last View in the container.\n   *\n   * You can optionally specify `dynamicallyCreatedProviders`, which configure the {@link Injector}\n   * that will be created for the Host View.\n   *\n   * Returns the {@link HostViewRef} of the Host View created for the newly instantiated Component.\n   */\n  abstract createHostView(protoViewRef?: ProtoViewRef, index?: number,\n                          dynamicallyCreatedProviders?: ResolvedProvider[]): HostViewRef;\n\n  /**\n   * Inserts a View identified by a {@link ViewRef} into the container at the specified `index`.\n   *\n   * If `index` is not specified, the new View will be inserted as the last View in the container.\n   *\n   * Returns the inserted {@link ViewRef}.\n   */\n  abstract insert(viewRef: ViewRef, index?: number): ViewRef;\n\n  /**\n   * Returns the index of the View, specified via {@link ViewRef}, within the current container or\n   * `-1` if this container doesn't contain the View.\n   */\n  abstract indexOf(viewRef: ViewRef): number;\n\n  /**\n   * Destroys a View attached to this container at the specified `index`.\n   *\n   * If `index` is not specified, the last View in the container will be removed.\n   */\n  abstract remove(index?: number): void;\n\n  /**\n   * Use along with {@link #insert} to move a View within the current container.\n   *\n   * If the `index` param is omitted, the last {@link ViewRef} is detached.\n   */\n  abstract detach(index?: number): ViewRef;\n}\n\nexport class ViewContainerRef_ extends ViewContainerRef {\n  constructor(public viewManager: avmModule.AppViewManager, element: ElementRef) {\n    super();\n    this.element = element;\n  }\n\n  private _getViews(): Array<viewModule.AppView> {\n    let element = <ElementRef_>this.element;\n    var vc = internalView(element.parentView).viewContainers[element.boundElementIndex];\n    return isPresent(vc) ? vc.views : [];\n  }\n\n  get(index: number): ViewRef { return this._getViews()[index].ref; }\n  get length(): number { return this._getViews().length; }\n\n  // TODO(rado): profile and decide whether bounds checks should be added\n  // to the methods below.\n  createEmbeddedView(templateRef: TemplateRef, index: number = -1): ViewRef {\n    if (index == -1) index = this.length;\n    return this.viewManager.createEmbeddedViewInContainer(this.element, index, templateRef);\n  }\n\n  createHostView(protoViewRef: ProtoViewRef = null, index: number = -1,\n                 dynamicallyCreatedProviders: ResolvedProvider[] = null): HostViewRef {\n    if (index == -1) index = this.length;\n    return this.viewManager.createHostViewInContainer(this.element, index, protoViewRef,\n                                                      dynamicallyCreatedProviders);\n  }\n\n  // TODO(i): refactor insert+remove into move\n  insert(viewRef: ViewRef, index: number = -1): ViewRef {\n    if (index == -1) index = this.length;\n    return this.viewManager.attachViewInContainer(this.element, index, viewRef);\n  }\n\n  indexOf(viewRef: ViewRef): number {\n    return ListWrapper.indexOf(this._getViews(), internalView(viewRef));\n  }\n\n  // TODO(i): rename to destroy\n  remove(index: number = -1): void {\n    if (index == -1) index = this.length - 1;\n    this.viewManager.destroyViewInContainer(this.element, index);\n    // view is intentionally not returned to the client.\n  }\n\n  // TODO(i): refactor insert+remove into move\n  detach(index: number = -1): ViewRef {\n    if (index == -1) index = this.length - 1;\n    return this.viewManager.detachViewInContainer(this.element, index);\n  }\n}\n"]}