Feature discovery - Provide quick fix to 'Configure static import...' (…

…#3339)

src/clientCodeActionProvider.ts

@@ -0,0 +1,32 @@
+import { CancellationToken, CodeAction, CodeActionContext, CodeActionKind, CodeActionProvider, Command, ExtensionContext, ProviderResult, Range, Selection, TextDocument, commands } from "vscode";
+import { apiManager } from "./apiManager";
+
+const configureStaticImportsCommand = "java.action.configureFavoriteStaticMembers";
+const UNDEFINED_METHOD = "67108964";
+export class ClientCodeActionProvider implements CodeActionProvider<CodeAction> {
+	constructor(readonly context: ExtensionContext) {
+		context.subscriptions.push(commands.registerCommand(configureStaticImportsCommand, async () => {
+			commands.executeCommand("workbench.action.openSettings", "java.completion.favoriteStaticMembers");
+			apiManager.fireTraceEvent({
+				name: "java.ls.command",
+				properties: {
+					command: configureStaticImportsCommand,
+				},
+			});
+		}));
+	}
+
+	provideCodeActions(document: TextDocument, range: Range | Selection, context: CodeActionContext, token: CancellationToken): ProviderResult<(CodeAction | Command)[]> {
+		const codeActions = [];
+		if (context.diagnostics?.some(diagnostic => diagnostic.code === UNDEFINED_METHOD)
+			|| document.lineAt(range.start.line)?.text?.startsWith("import ")) {
+			const action = new CodeAction("Configure static import...", CodeActionKind.QuickFix);
+			action.command = {
+				title: "Configure static import...",
+				command: configureStaticImportsCommand,
+			};
+			codeActions.push(action);
+		}
+		return codeActions;
+	}
+}

src/standardLanguageClient.ts

@@ -39,6 +39,7 @@ import { Telemetry } from "./telemetry";
 import { TelemetryEvent } from "@redhat-developer/vscode-redhat-telemetry/lib";
 import { registerDocumentValidationListener } from './diagnostic';
 import { listJdks, sortJdksBySource, sortJdksByVersion } from './jdkUtils';
+import { ClientCodeActionProvider } from './clientCodeActionProvider';
 
 const extensionName = 'Language Support for Java';
 const GRADLE_CHECKSUM = "gradle/checksum/prompt";
@@ -618,6 +619,10 @@ export class StandardLanguageClient {
 			pattern: "**/{gradle/wrapper/gradle-wrapper.properties,build.gradle,build.gradle.kts,settings.gradle,settings.gradle.kts}"
 		}, new GradleCodeActionProvider(), gradleCodeActionMetadata);
 
+		languages.registerCodeActionsProvider({
+			scheme: 'file',
+			language: 'java'
+		}, new ClientCodeActionProvider(context));
 	}
 
 	private showGradleCompatibilityIssueNotification(message: string, options: string[], projectUri: string, gradleVersion: string, newJavaHome: string) {