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contribution-provider.ts
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contribution-provider.ts
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/********************************************************************************
* Copyright (C) 2017 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 WITH Classpath-exception-2.0
********************************************************************************/
import { interfaces } from 'inversify';
export const ContributionProvider = Symbol('ContributionProvider');
export interface ContributionProvider<T extends object> {
/**
* @param recursive `true` if the contributions should be collected from the parent containers as well. Otherwise, `false`. It is `false` by default.
*/
getContributions(recursive?: boolean): T[]
}
class ContainerBasedContributionProvider<T extends object> implements ContributionProvider<T> {
protected services: T[] | undefined;
constructor(
protected readonly serviceIdentifier: interfaces.ServiceIdentifier<T>,
protected readonly container: interfaces.Container
) { }
getContributions(recursive?: boolean): T[] {
if (this.services === undefined) {
const currentServices: T[] = [];
let currentContainer: interfaces.Container | null = this.container;
// eslint-disable-next-line no-null/no-null
while (currentContainer !== null) {
if (currentContainer.isBound(this.serviceIdentifier)) {
try {
currentServices.push(...currentContainer.getAll(this.serviceIdentifier));
} catch (error) {
console.error(error);
}
}
// eslint-disable-next-line no-null/no-null
currentContainer = recursive === true ? currentContainer.parent : null;
}
this.services = currentServices;
}
return this.services;
}
}
export type Bindable = interfaces.Bind | interfaces.Container;
export namespace Bindable {
export function isContainer(arg: Bindable): arg is interfaces.Container {
return typeof arg !== 'function'
// https://github.com/eclipse-theia/theia/issues/3204#issue-371029654
// In InversifyJS `4.14.0` containers no longer have a property `guid`.
&& ('guid' in arg || 'parent' in arg);
}
}
export function bindContributionProvider(bindable: Bindable, id: symbol): void {
const bindingToSyntax = (Bindable.isContainer(bindable) ? bindable.bind(ContributionProvider) : bindable(ContributionProvider));
bindingToSyntax
.toDynamicValue(ctx => new ContainerBasedContributionProvider(id, ctx.container))
.inSingletonScope().whenTargetNamed(id);
}