Support viewing inherited members through QuickPick UI.

- The QuickPick view API is used to show the document outline with
  inherited symbols using the new language server extension method,
  'java/extendedDocumentSymbol'.
- When ctrl+o is activated from the quick-pick menu (eg. the outline
  view is already active), the extended outline is then activated

Co-Authored-by: Gayan Perera <gayanper@gmail.com>
Co-Authored-by: Roland Grunberg <rgrunber@redhat.com>

Author: gayanper

package.json

@@ -1727,7 +1727,11 @@
       },
       {
         "command": "java.change.searchScope",
-        "title": "%java.change.searchScope%",
+        "title": "%java.change.searchScope%"
+      },
+      {
+        "command": "java.action.showExtendedOutline",
+        "title": "%java.action.showExtendedOutline%",
         "category": "Java"
       }
     ],
@@ -1757,6 +1761,11 @@
         "command": "java.action.doCleanup",
         "key": "ctrl+shift+alt+s",
         "when": "javaLSReady && editorLangId == java"
+      },
+      {
+        "command": "java.action.showExtendedOutline",
+        "key": "ctrl+o",
+        "when": "javaLSReady && inQuickOpen"
       }
     ],
     "menus": {

package.nls.json

@@ -28,5 +28,6 @@
 	"java.edit.smartSemicolonDetection": "Java Smart Semicolon Detection",
 	"java.action.filesExplorerPasteAction": "Paste Clipboard Text Into a File",
 	"java.action.doCleanup": "Performs Cleanup Actions",
-	"java.change.searchScope": "Change Search Scope"
+	"java.change.searchScope": "Change Search Scope",
+	"java.action.showExtendedOutline": "Open Extended Outline"
 }

src/commands.ts

@@ -361,6 +361,11 @@ export namespace Commands {
      */
     export const CHANGE_JAVA_SEARCH_SCOPE = "java.change.searchScope";
 
+    /**
+     * Show Extended Outline for current document.
+     */
+    export const SHOW_EXTEND_OUTLINE = 'java.action.showExtendedOutline';
+
 }
 
 /**

src/outline/extendedOutlineQuickPick.ts

@@ -0,0 +1,81 @@
+import { DocumentSymbolParams, LanguageClient, TextDocumentIdentifier } from "vscode-languageclient/node";
+import { getActiveLanguageClient } from "../extension";
+import { ExtendedDocumentSymbolRequest } from "./protocol";
+import { Location, Position, QuickPick, QuickPickItem, Uri, window, workspace } from "vscode";
+import { getLThemeIcon } from "../themeUtils";
+
+export class ExtendedOutlineQuickPick {
+	private api: QuickPick<QuickPickItem>;
+	private client: LanguageClient;
+	public initialized: boolean;
+
+	constructor() {
+		this.initialized = false;
+	}
+
+	async initialize() {
+		this.api = window.createQuickPick();
+		this.api.ignoreFocusOut = true;
+		this.api.onDidChangeActive((items: QuickPickItem[]) => {
+			if (items.length > 0) {
+				const active: QuickPickItem = items[0];
+				const uri = active["uri"];
+				const range = active["range"];
+				if (uri !== undefined) {
+					workspace.openTextDocument(Uri.parse(uri)).then(doc => {
+						window.showTextDocument(doc, {preserveFocus: true, selection: range});
+					});
+				} else {
+					window.showTextDocument(window.activeTextEditor.document, {preserveFocus: true, selection: range});
+				}
+			}
+		});
+		this.api.onDidAccept(() => {
+			this.api.hide();
+		});
+		this.client = await getActiveLanguageClient();
+		this.initialized = true;
+	}
+
+	async open(uri: Uri) {
+		if (!this.initialized) {
+			await this.initialize();
+		}
+
+		if (!this.api) {
+			return;
+		}
+
+		const location = new Location(uri, new Position(0, 0));
+		const params: DocumentSymbolParams = {
+			textDocument: TextDocumentIdentifier.create(location.uri.toString())
+		};
+		const symbols = await this.client.sendRequest(ExtendedDocumentSymbolRequest.type, params);
+		let quickPickItems: QuickPickItem[] = [];
+		for (const s of symbols) {
+			const icon = getLThemeIcon(s.kind).id;
+			const item = {
+				label: `$(${icon}) ${s.name}`,
+				description: s.detail.trim(),
+				uri: s.uri,
+				range: s.range
+			};
+			quickPickItems.push(item);
+			if (icon === 'symbol-class') {
+				const items: QuickPickItem[] = s.children.map(s => ({
+					label: `$(${getLThemeIcon(s.kind).id}) ${s.name}`,
+					// custom quick pick has automatic space between label & description
+					description: s.detail.trim(),
+					uri: s.uri,
+					range: s.range
+				}));
+				quickPickItems = quickPickItems.concat(items);
+			}
+		}
+		this.api.items = quickPickItems;
+		this.api.activeItems = [];
+		this.api.show();
+	}
+}
+
+export const extendedOutlineQuickPick: ExtendedOutlineQuickPick = new ExtendedOutlineQuickPick();

src/outline/protocol.ts

@@ -0,0 +1,10 @@
+import { DocumentSymbol, DocumentSymbolParams, RequestType } from "vscode-languageclient";
+
+export namespace ExtendedDocumentSymbolRequest {
+	export const type = new RequestType<DocumentSymbolParams, ExtendedDocumentSymbol[], void>('java/extendedDocumentSymbol');
+}
+
+export interface ExtendedDocumentSymbol extends DocumentSymbol {
+	uri: string;
+	children?: ExtendedDocumentSymbol[];
+}

src/standardLanguageClient.ts

@@ -41,6 +41,7 @@ import { registerDocumentValidationListener } from './diagnostic';
 import { listJdks, sortJdksBySource, sortJdksByVersion } from './jdkUtils';
 import { ClientCodeActionProvider } from './clientCodeActionProvider';
 import { BuildFileSelector } from './buildFilesSelector';
+import { extendedOutlineQuickPick } from "./outline/extendedOutlineQuickPick";
 
 const extensionName = 'Language Support for Java';
 const GRADLE_CHECKSUM = "gradle/checksum/prompt";
@@ -593,6 +594,17 @@ export class StandardLanguageClient {
 			}
 		}));
 
+		context.subscriptions.push(commands.registerCommand(Commands.SHOW_EXTEND_OUTLINE, (location: any) => {
+			if (location instanceof Uri) {
+				extendedOutlineQuickPick.open(location);
+			} else {
+				if (window.activeTextEditor?.document?.languageId !== "java") {
+					return;
+				}
+				extendedOutlineQuickPick.open(window.activeTextEditor.document.uri);
+			}
+		}));
+
 		buildPath.registerCommands(context);
 		sourceAction.registerCommands(this.languageClient, context);
 		refactorAction.registerCommands(this.languageClient, context);
@@ -897,4 +909,4 @@ export class DisableWillRenameFeature implements StaticFeature {
 	fillInitializeParams?: () => void;
 	preInitialize?: () => void;
 	initialize(): void {}
-}
+}

src/themeUtils.ts

@@ -0,0 +1,20 @@
+import { SymbolKind as VSymbolKind, ThemeIcon } from "vscode";
+import { SymbolKind as LSymbolKind} from "vscode-languageclient";
+
+const themeIconIds = [
+	'symbol-file', 'symbol-module', 'symbol-namespace', 'symbol-package', 'symbol-class', 'symbol-method',
+	'symbol-property', 'symbol-field', 'symbol-constructor', 'symbol-enum', 'symbol-interface',
+	'symbol-function', 'symbol-variable', 'symbol-constant', 'symbol-string', 'symbol-number', 'symbol-boolean',
+	'symbol-array', 'symbol-object', 'symbol-key', 'symbol-null', 'symbol-enum-member', 'symbol-struct',
+	'symbol-event', 'symbol-operator', 'symbol-type-parameter'
+];
+
+export function getLThemeIcon(kind:  LSymbolKind): ThemeIcon | undefined {
+	const id = themeIconIds[kind - 1];
+	return id ? new ThemeIcon(id) : undefined;
+}
+
+export function getThemeIcon(kind: VSymbolKind): ThemeIcon | undefined {
+	const id = themeIconIds[kind];
+	return id ? new ThemeIcon(id) : undefined;
+}

src/typeHierarchy/model.ts

@@ -5,6 +5,7 @@ import { getActiveLanguageClient } from "../extension";
 import { LanguageClient } from "vscode-languageclient/node";
 import { getRootItem, resolveTypeHierarchy, typeHierarchyDirectionToContextString } from "./util";
 import { CancellationToken, commands, workspace } from "vscode";
+import { getThemeIcon } from "../themeUtils";
 
 export class TypeHierarchyTreeInput implements SymbolTreeInput<TypeHierarchyItem> {
 	readonly contextValue: string = "javaTypeHierarchy";
@@ -124,7 +125,7 @@ class TypeHierarchyTreeDataProvider implements vscode.TreeDataProvider<TypeHiera
 		const treeItem: vscode.TreeItem = (element === this.model.getBaseItem()) ? new vscode.TreeItem({ label: element.name, highlights: [[0, element.name.length]] }) : new vscode.TreeItem(element.name);
 		treeItem.contextValue = (element === this.model.getBaseItem() || !element.uri) ? "false" : "true";
 		treeItem.description = element.detail;
-		treeItem.iconPath = TypeHierarchyTreeDataProvider.getThemeIcon(element.kind);
+		treeItem.iconPath = getThemeIcon(element.kind);
 		treeItem.command = (element.uri) ? {
 			command: 'vscode.open',
 			title: 'Open Type Definition Location',
@@ -248,17 +249,4 @@ class TypeHierarchyTreeDataProvider implements vscode.TreeDataProvider<TypeHiera
 			expand: false,
 		};
 	}
-
-	private static themeIconIds = [
-		'symbol-file', 'symbol-module', 'symbol-namespace', 'symbol-package', 'symbol-class', 'symbol-method',
-		'symbol-property', 'symbol-field', 'symbol-constructor', 'symbol-enum', 'symbol-interface',
-		'symbol-function', 'symbol-variable', 'symbol-constant', 'symbol-string', 'symbol-number', 'symbol-boolean',
-		'symbol-array', 'symbol-object', 'symbol-key', 'symbol-null', 'symbol-enum-member', 'symbol-struct',
-		'symbol-event', 'symbol-operator', 'symbol-type-parameter'
-	];
-
-	private static getThemeIcon(kind: vscode.SymbolKind): vscode.ThemeIcon | undefined {
-		const id = TypeHierarchyTreeDataProvider.themeIconIds[kind];
-		return id ? new vscode.ThemeIcon(id) : undefined;
-	}
 }