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/*---------------------------------------------------------------------------------------------
history.ts
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* Copyright (c) Microsoft Corporation. All rights reserved.
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* Licensed under the MIT License. See License.txt in the project root for license information.
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*--------------------------------------------------------------------------------------------*/
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import { SetWithKey } from './collections.js';
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import { Event } from './event.js';
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import { IDisposable } from './lifecycle.js';
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import { ArrayNavigator, INavigator } from './navigator.js';
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export interface IHistory<T> {
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delete(t: T): boolean;
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add(t: T): this;
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has(t: T): boolean;
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clear(): void;
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forEach(callbackfn: (value: T, value2: T, set: Set<T>) => void, thisArg?: unknown): void;
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replace?(t: T[]): void;
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readonly onDidChange?: Event<string[]>;
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}
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export class HistoryNavigator<T> implements INavigator<T> {
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private _limit: number;
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private _navigator!: ArrayNavigator<T>;
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private _disposable: IDisposable | undefined;
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constructor(
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private _history: IHistory<T> = new Set(),
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limit: number = 10,