xterm

[VSoRC/.git] / node_modules / xterm / src / common / Lifecycle.ts

diff --git a/node_modules/xterm/src/common/Lifecycle.ts b/node_modules/xterm/src/common/Lifecycle.ts
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+++ b/node_modules/xterm/src/common/Lifecycle.ts
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+/**
+ * Copyright (c) 2018 The xterm.js authors. All rights reserved.
+ * @license MIT
+ */
+
+import { IDisposable } from 'common/Types';
+
+/**
+ * A base class that can be extended to provide convenience methods for managing the lifecycle of an
+ * object and its components.
+ */
+export abstract class Disposable implements IDisposable {
+  protected _disposables: IDisposable[] = [];
+  protected _isDisposed: boolean = false;
+
+  constructor() {
+  }
+
+  /**
+   * Disposes the object, triggering the `dispose` method on all registered IDisposables.
+   */
+  public dispose(): void {
+    this._isDisposed = true;
+    this._disposables.forEach(d => d.dispose());
+    this._disposables.length = 0;
+  }
+
+  /**
+   * Registers a disposable object.
+   * @param d The disposable to register.
+   */
+  public register<T extends IDisposable>(d: T): void {
+    this._disposables.push(d);
+  }
+
+  /**
+   * Unregisters a disposable object if it has been registered, if not do
+   * nothing.
+   * @param d The disposable to unregister.
+   */
+  public unregister<T extends IDisposable>(d: T): void {
+    const index = this._disposables.indexOf(d);
+    if (index !== -1) {
+      this._disposables.splice(index, 1);
+    }
+  }
+}