Add lsp code action ui sample

lsp-user-input-sample/server/src/sampleServer.ts

@@ -0,0 +1,80 @@
+/* --------------------------------------------------------------------------------------------
+ * Copyright (c) Microsoft Corporation. All rights reserved.
+ * Licensed under the MIT License. See License.txt in the project root for license information.
+ * ------------------------------------------------------------------------------------------ */
+'use strict';
+
+import {
+	CodeAction, CodeActionKind, Command, createConnection, Diagnostic, DiagnosticSeverity, Position, Range, TextDocumentEdit,
+	TextDocuments, TextDocumentSyncKind, TextEdit
+} from 'vscode-languageserver';
+import { TextDocument } from 'vscode-languageserver-textdocument';
+
+const connection = createConnection();
+connection.console.info(`Sample server running in node ${process.version}`);
+
+const documents: TextDocuments<TextDocument> = new TextDocuments(TextDocument);
+documents.listen(connection);
+
+connection.onInitialize(() => {
+	return {
+		capabilities: {
+			codeActionProvider: true,
+			textDocumentSync: {
+				openClose: true,
+				change: TextDocumentSyncKind.Incremental
+			},
+			executeCommandProvider: {
+				commands: ['sample.fixMe']
+			}
+		}
+	};
+});
+
+function validate(document: TextDocument): void {
+	connection.sendDiagnostics({
+		uri: document.uri,
+		version: document.version,
+		diagnostics: [
+			Diagnostic.create(Range.create(0,0,0, 10), 'Something is wrong here', DiagnosticSeverity.Warning)
+		]
+	});
+}
+
+documents.onDidOpen((event) => {
+	validate(event.document);
+});
+
+documents.onDidChangeContent((event) => {
+	validate(event.document);
+});
+
+connection.onCodeAction((params) => {
+	const textDocument = documents.get(params.textDocument.uri);
+	if (textDocument === undefined) {
+		return undefined;
+	}
+	const title = 'With User Input';
+	return [CodeAction.create(title, Command.create(title, 'sample.fixMe', textDocument.uri), CodeActionKind.QuickFix)];
+});
+
+connection.onExecuteCommand(async (params) => {
+	if (params.command !== 'sample.fixMe' || params.arguments ===  undefined) {
+		return;
+	}
+
+	const textDocument = documents.get(params.arguments[0]);
+	if (textDocument === undefined) {
+		return;
+	}
+	const newText = typeof params.arguments[1] === 'string' ? params.arguments[1] : 'Eclipse';
+	connection.workspace.applyEdit({
+		documentChanges: [
+			TextDocumentEdit.create({ uri: textDocument.uri, version: textDocument.version }, [
+				TextEdit.insert(Position.create(0, 0), newText)
+			])
+		]
+	});
+});
+
+connection.listen();