/********************************************************************************
 * Copyright (C) 2019 Ericsson 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 WITH Classpath-exception-2.0
 ********************************************************************************/ import debounce = require ( 'lodash.debounce' ) ; import { Title , Widget } from '@phosphor/widgets' ; import { inject , injectable , named } from 'inversify' ; import { Event , Emitter , ContributionProvider } from '../../common' ; import { WidgetDecoration } from '../widget-decoration' ; import { FrontendApplicationContribution } from '../frontend-application' ; export const TabBarDecorator = Symbol ( 'TabBarDecorator' ) ; export interface TabBarDecorator { /**
     * The unique identifier of the tab bar decorator.
     */ readonly id : string ; /**
     * Event that is fired when any of the available tab bar decorators has changes.
     */ readonly onDidChangeDecorations : Event < void > ; param { Title < Widget > } title returns decorate ( title ) : WidgetDecoration . Data [ ] ; } @ injectable ( ) export class TabBarDecoratorService implements FrontendApplicationContribution { protected readonly onDidChangeDecorationsEmitter = new Emitter < void > ( ) ; readonly onDidChangeDecorations = this . onDidChangeDecorationsEmitter . event ; @ inject ( ContributionProvider ) @ named ( TabBarDecorator ) protected readonly contributions : ContributionProvider < TabBarDecorator > ; initialize ( ) { this . contributions . getContributions ( ) . map ( decorator => decorator . onDidChangeDecorations ( this . fireDidChangeDecorations ) ) ; } fireDidChangeDecorations = debounce ( ( ) => this . onDidChangeDecorationsEmitter . fire ( undefined ) , 150 ) ; param { Title < Widget > } title returns getDecorations ( title ) { const decorators = this . contributions . getContributions ( ) ; let all = [ ] ; for ( const decorator of decorators ) { const decorations = decorator . decorate ( title ) ; all = all . concat ( decorations ) ; } return all ; } }