Add ability to get selection context after execute command

Signed-off-by: Vladyslav Zhukovskyi <vzhukovs@redhat.com>

packages/plugin-ext/src/main/browser/plugin-ext-frontend-module.ts

@@ -57,6 +57,7 @@ import { PluginDebugSessionContributionRegistry } from './debug/plugin-debug-ses
 import { PluginDebugService } from './debug/plugin-debug-service';
 import { DebugService } from '@theia/debug/lib/common/debug-service';
 import { PluginSharedStyle } from './plugin-shared-style';
+import { SelectionProviderCommandContribution } from './selection-provider-command';
 
 export default new ContainerModule((bind, unbind, isBound, rebind) => {
     bindHostedPluginPreferences(bind);
@@ -67,6 +68,8 @@ export default new ContainerModule((bind, unbind, isBound, rebind) => {
     bind(HostedPluginWatcher).toSelf().inSingletonScope();
     bind(HostedPluginLogViewer).toSelf().inSingletonScope();
     bind(HostedPluginManagerClient).toSelf().inSingletonScope();
+    bind(SelectionProviderCommandContribution).toSelf().inSingletonScope();
+    bind(CommandContribution).toService(SelectionProviderCommandContribution);
 
     bind(FrontendApplicationContribution).to(HostedPluginInformer).inSingletonScope();
     bind(FrontendApplicationContribution).to(HostedPluginController).inSingletonScope();

packages/plugin-ext/src/main/browser/selection-provider-command.ts

@@ -0,0 +1,46 @@
+/********************************************************************************
+ * Copyright (C) 2019 Red Hat, Inc. 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 { Command, CommandContribution, CommandRegistry } from '@theia/core/lib/common/command';
+import { inject, injectable } from 'inversify';
+import { UriAwareCommandHandler, UriCommandHandler } from '@theia/core/lib/common/uri-command-handler';
+import URI from '@theia/core/lib/common/uri';
+import { SelectionService } from '@theia/core';
+import { theiaUritoUriComponents } from '../../common/uri-components';
+
+export namespace SelectionProviderCommands {
+    export const GET_SELECTED_CONTEXT: Command = {
+        id: 'theia.plugin.workspace.selectedContext'
+    };
+}
+
+@injectable()
+export class SelectionProviderCommandContribution implements CommandContribution {
+
+    @inject(SelectionService) protected readonly selectionService: SelectionService;
+
+    registerCommands(commands: CommandRegistry): void {
+        commands.registerCommand(SelectionProviderCommands.GET_SELECTED_CONTEXT, this.newMultiUriAwareCommandHandler({
+            isEnabled: () => true,
+            isVisible: () => false,
+            execute: (selectedUris: URI[]) => selectedUris.map(uri => theiaUritoUriComponents(uri))
+        }));
+    }
+
+    protected newMultiUriAwareCommandHandler(handler: UriCommandHandler<URI[]>): UriAwareCommandHandler<URI[]> {
+        return new UriAwareCommandHandler(this.selectionService, handler, { multi: true });
+    }
+}