support single file debug

src/extension.ts

@@ -8,7 +8,7 @@ import { workspace, ExtensionContext, window, StatusBarAlignment, commands, View
 import { LanguageClient, LanguageClientOptions, Position as LSPosition, Location as LSLocation } from 'vscode-languageclient';
 import { runServer, awaitServerConnection } from './javaServerStarter';
 import { Commands } from './commands';
-import { StatusNotification, ClassFileContentsRequest, ProjectConfigurationUpdateRequest, MessageType, ActionableNotification, FeatureStatus, ActionableMessage, DebugSessionRequest, ClasspathResolveRequest, ClasspathResolveRequestParams } from './protocol';
+import { StatusNotification, ClassFileContentsRequest, ProjectConfigurationUpdateRequest, MessageType, ActionableNotification, FeatureStatus, ActionableMessage, DebugSessionRequest, ClasspathResolveRequest, ClasspathResolveRequestParams, BuildWorkspaceRequest, BuildWorkspaceResult, BuildWorkspaceStatus } from './protocol';
 
 let os = require('os');
 let oldConfig;
@@ -105,6 +105,25 @@ export function activate(context: ExtensionContext) {
 							lastStatus = item.text;
 							resolve();
 							commands.registerCommand(Commands.START_DEBUG_SESSION, async (config) => {
+								if (!config.request) { // if 'request' is missing interpret this as a missing launch.json
+									config.type = 'java';
+									config.name = 'Java Debug';
+									config.request = 'launch';
+									const editor = vscode.window.activeTextEditor;
+									if (editor && editor.document.languageId === 'java') {
+										const fullpath = editor.document.fileName;
+										const cur = path.dirname(fullpath);
+										config.startupClass = path.basename(fullpath, '.java');
+										config.sourcePath = [cur];
+										config.cwd = cur;
+										config.stopOnEntry = true;
+										const buildResult = await languageClient.sendRequest(BuildWorkspaceRequest.type, '');
+										if (buildResult.status === BuildWorkspaceStatus.FAILURE) {
+											vscode.window.showErrorMessage('Build failed, please fix build error first.');
+											return;
+										}
+									}
+								}
 								if (!config.startupClass) {
 									vscode.window.showErrorMessage('Please specify startupClass on launch.json firstly.');
 								} else {

src/protocol.ts

@@ -60,6 +60,15 @@ export interface ClasspathResolveRequestParams {
     projectName?: string;
 }
 
+export enum BuildWorkspaceStatus {
+    FAILURE = 0,
+    SUCCESS = 1,
+}
+
+export interface BuildWorkspaceResult {
+    status: BuildWorkspaceStatus;
+}
+
 export namespace StatusNotification {
 	export const type = new NotificationType<StatusReport,void >('language/status');
 }
@@ -82,4 +91,8 @@ export namespace DebugSessionRequest {
 
 export namespace ClasspathResolveRequest {
     export const type = new RequestType<ClasspathResolveRequestParams, string, void, void>('java/resolveClasspaths');
+}
+
+export namespace BuildWorkspaceRequest {
+    export const type = new RequestType<string, BuildWorkspaceResult, void, void>('java/buildWorkspace');
 }