// Copyright (c) Microsoft Corporation. All rights reserved.

// Licensed under the MIT License.

'use strict';

// tslint:disable: no-any

export type Event<T> = (listener: (e?: T) => any) => void;

// Simpler version of the vscode event emitter for passing down through react components.

// Easier to manage than forwarding refs when not sure what the type of the ref should be.

//

// We can't use the vscode version because pulling in vscode apis is not allowed in a webview

export class EventEmitter<T> {

private _event: Event<T> | undefined;

private _listeners: Set<(e?: T) => any> = new Set<(e?: T) => any>();

public get event(): Event<T> {

if (!this._event) {

this._event = (listener: (e?: T) => any): void => {

this._listeners.add(listener);

};

}

return this._event;

}

public fire(data?: T): void {

this._listeners.forEach(c => c(data));

}

public dispose(): void {

this._listeners.clear();

}

}

export interface IKeyboardEvent {

readonly code: string;

readonly target: HTMLElement;

readonly ctrlKey: boolean;

readonly shiftKey: boolean;

readonly altKey: boolean;

readonly metaKey: boolean;

readonly editorInfo?: {

isFirstLine: boolean;

isLastLine: boolean;

isSuggesting: boolean;

isDirty: boolean;

contents: string;

clear(): void;

};

preventDefault(): void;

stopPropagation(): void;

}