implab/implabjs-core Files · src/main/ts/EventProvider.ts

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             EventProvider.ts
        
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             / src / main / ts / EventProvider.ts
          
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      import { IDestroyable } from "./interfaces";

      import { Observable } from "./Observable";

      /**

       * Event proviers are used to produce events, throug this object you can feed

       * the Observable with input events. Once the EventProvider is destroyed the

       * bound obsevable is disconnected and marked as 'done'.

       */

      export class EventProvider<T> implements IDestroyable {

          _observable: Observable<T> | undefined;

          _next: ((evt: T) => void) | undefined;

          _done: (() => void) | undefined;

          constructor() {

              this._observable = new Observable<T>((next, _error, done) => {

                  this._next = next;

                  this._done = done;

              });

          }

          destroy(): void {

              if (this._observable) {

                  // break all references

                  this._observable = undefined;

                  this._next = undefined;

                  this._done = undefined;

              }

          }

          post(event: T) {

              return this._next && this._next(event);

          }

          getObservable() {

              if (!this._observable)

                  throw new Error("The object is destroyed");

              return this._observable;

          }

      }

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				import { IDestroyable } from "./interfaces";
				import { Observable } from "./Observable";

				/**
				* Event proviers are used to produce events, throug this object you can feed
				* the Observable with input events. Once the EventProvider is destroyed the
				* bound obsevable is disconnected and marked as 'done'.
				*/
				export class EventProvider<T> implements IDestroyable {

				_observable: Observable<T> \| undefined;

				_next: ((evt: T) => void) \| undefined;
				_done: (() => void) \| undefined;

				constructor() {
				this._observable = new Observable<T>((next, _error, done) => {
				this._next = next;
				this._done = done;
				});
				}

				destroy(): void {
				if (this._observable) {
				// break all references
				this._observable = undefined;
				this._next = undefined;
				this._done = undefined;
				}
				}
				post(event: T) {
				return this._next && this._next(event);
				}

				getObservable() {
				if (!this._observable)
				throw new Error("The object is destroyed");

				return this._observable;
				}
				}