/
tab-bar-decorator.ts
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/
tab-bar-decorator.ts
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/********************************************************************************
* 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>;
/**
* Decorate title.
* @param {Title<Widget>} title the title
* @returns decoration data.
*/
decorate(title: Title<Widget>): 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(): void {
this.contributions.getContributions().map(decorator => decorator.onDidChangeDecorations(this.fireDidChangeDecorations));
}
protected fireDidChangeDecorations = debounce(() => this.onDidChangeDecorationsEmitter.fire(undefined), 150);
/**
* Assign tabs the decorators provided by all the contributions.
* @param {Title<Widget>} title the title
* @returns an array of its decoration data.
*/
getDecorations(title: Title<Widget>): WidgetDecoration.Data[] {
const decorators = this.contributions.getContributions();
let all: WidgetDecoration.Data[] = [];
for (const decorator of decorators) {
const decorations = decorator.decorate(title);
all = all.concat(decorations);
}
return all;
}
}