// *****************************************************************************
// Copyright (C) 2019 TypeFox and others.
//
// This program and the accompanying materials are made available under the
// terms of the Eclipse Public License v. 2.0 which is available at
// http://www.eclipse.org/legal/epl-2.0.
//
// This Source Code may also be made available under the following Secondary
// Licenses when the conditions for such availability set forth in the Eclipse
// Public License v. 2.0 are satisfied: GNU General Public License, version 2
// with the GNU Classpath Exception which is available at
// https://www.gnu.org/software/classpath/license.html.
//
// SPDX-License-Identifier: EPL-2.0 OR GPL-2.0-only WITH Classpath-exception-2.0
// *****************************************************************************

import { postConstruct, injectable } from 'inversify';
import { KeyboardLayoutChangeNotifier, NativeKeyboardLayout } from '../../common/keyboard/keyboard-layout-provider';
import { Emitter, Event } from '../../common/event';

/**
 * Keyboard layout changes are detected by the native-keymap package. This must happen in the
 * main process of Electron. The events are sent to the renderer process using Electron IPC.
 */
@injectable()
export class ElectronKeyboardLayoutChangeNotifier implements KeyboardLayoutChangeNotifier {

    protected readonly nativeLayoutChanged = new Emitter<NativeKeyboardLayout>();

    get onDidChangeNativeLayout(): Event<NativeKeyboardLayout> {
        return this.nativeLayoutChanged.event;
    }

    @postConstruct()
    protected init(): void {
        window.electronTheiaCore.onKeyboardLayoutChanged((newLayout: NativeKeyboardLayout) => this.nativeLayoutChanged.fire(newLayout));
    }

}