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

working on services lifetime

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ioc ts support

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             ObservableValue.ts
        
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             / src / main / ts / ObservableValue.ts
          
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      import { Observable } from "./Observable";

      import { IDestroyable } from "./interfaces";

      import { argumentNotNull } from "./safe";

      type Handler<T> = (x: T) => void;

      export class ObservableValue<T> extends Observable<T> {

          private _value: T;

          constructor(initial: T) {

              super();

              this._value = initial;

          }

          getValue() {

              return this._value;

          }

          setValue(value: T) {

              if (this._value !== value) {

                  this._value = value;

                  this._notifyNext(value);

              }

          }

          on(next: Handler<T>, error?: Handler<any>, complete?: () => void): IDestroyable {

              argumentNotNull(next, "next");

              try {

                  next(this._value);

              } catch {

                  // suppress error

              }

              return super.on(next, error, complete);

          }

      }

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

				type Handler<T> = (x: T) => void;

				export class ObservableValue<T> extends Observable<T> {
				private _value: T;

				constructor(initial: T) {
				super();
				this._value = initial;
				}

				getValue() {
				return this._value;
				}

				setValue(value: T) {
				if (this._value !== value) {
				this._value = value;
				this._notifyNext(value);
				}
				}

				on(next: Handler<T>, error?: Handler<any>, complete?: () => void): IDestroyable {
				argumentNotNull(next, "next");
				try {
				next(this._value);
				} catch {
				// suppress error
				}
				return super.on(next, error, complete);
				}
				}