first commit

xterminal/source/base/disposable.ts

@@ -0,0 +1,42 @@
+import type { IDisposable } from "../types";
+
+/**
+ * Disposables
+ *
+ * https://blog.hediet.de/post/the_disposable_pattern_in_typescript
+ *
+ * https://github.com/xtermjs/xterm.js/blob/master/src/common/Lifecycle.ts
+ */
+
+export default class Disposable implements IDisposable {
+    // private store for states
+    #disposables: IDisposable[];
+
+    public isDisposed: boolean;
+
+    constructor() {
+        this.isDisposed = false;
+        this.#disposables = [];
+    }
+
+    /**
+     * Registers a disposable object
+     * @param d The disposable to register
+     */
+    public register<T extends IDisposable>(d: T): void {
+        if (this.isDisposed) {
+            d?.dispose();
+        } else {
+            this.#disposables.push(d);
+        }
+    }
+
+    /**
+     * Disposes the object, triggering the `dispose` method on all registered disposables
+     */
+    public dispose(): void {
+        if (this.isDisposed) return;
+        this.isDisposed = true;
+        this.#disposables.forEach((d) => d?.dispose());
+    }
+}