/*---------------------------------------------------------------------------------------------

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

* Licensed under the MIT License. See License.txt in the project root for license information.

*--------------------------------------------------------------------------------------------*/

import * as vscode from 'vscode';

import { Disposable } from './common/lifecycle';

import { COLOR_THEME, WORKBENCH } from './common/settingKeys';

import { loadCurrentThemeData, ThemeData } from './view/theme';

export interface IThemeWatcher {

readonly onDidChangeTheme: vscode.Event<ThemeData | undefined>;

readonly themeData: ThemeData | undefined;

}

export class ThemeWatcher extends Disposable implements IThemeWatcher {

private _themeData: ThemeData | undefined;

private _onDidChangeTheme = this._register(new vscode.EventEmitter<ThemeData | undefined>());

readonly onDidChangeTheme = this._onDidChangeTheme.event;

constructor() {

super();

this._register(

vscode.workspace.onDidChangeConfiguration(async e => {

if (e.affectsConfiguration(`${WORKBENCH}.${COLOR_THEME}`)) {

await this.updateTheme();

}

}),

);

this.updateTheme();

}

private async updateTheme() {

this._themeData = await loadCurrentThemeData();

this._onDidChangeTheme.fire(this._themeData);

}

get themeData() {

return this._themeData;

}

}