Introduce localize2 function

This is syntax sugar around:
```
{ value localize('id', "Hello"), original: 'Hello' }
```

That will now be returned when you do:
```
localize2('id', "Hello");
```

.eslintplugin/code-no-unexternalized-strings.ts

@@ -142,13 +142,17 @@ export = new class NoUnexternalizedStrings implements eslint.Rule.RuleModule {
 			// localize(...)
 			['CallExpression[callee.type="MemberExpression"][callee.object.name="nls"][callee.property.name="localize"]:exit']: (node: any) => visitLocalizeCall(node),
 
+			// localize2(...)
+			['CallExpression[callee.type="MemberExpression"][callee.object.name="nls"][callee.property.name="localize2"]:exit']: (node: any) => visitLocalizeCall(node),
+
 			// vscode.l10n.t(...)
 			['CallExpression[callee.type="MemberExpression"][callee.object.property.name="l10n"][callee.property.name="t"]:exit']: (node: any) => visitL10NCall(node),
 
 			// l10n.t(...)
 			['CallExpression[callee.object.name="l10n"][callee.property.name="t"]:exit']: (node: any) => visitL10NCall(node),
 
 			['CallExpression[callee.name="localize"][arguments.length>=2]:exit']: (node: any) => visitLocalizeCall(node),
+			['CallExpression[callee.name="localize2"][arguments.length>=2]:exit']: (node: any) => visitLocalizeCall(node),
 			['Program:exit']: reportBadStringsAndBadKeys,
 		};
 	}

build/lib/nls.ts

@@ -181,7 +181,12 @@ module _nls {
 		return node.kind === ts.SyntaxKind.CallExpression ? CollectStepResult.YesAndRecurse : CollectStepResult.NoAndRecurse;
 	}
 
-	function analyze(ts: typeof import('typescript'), contents: string, options: ts.CompilerOptions = {}): ILocalizeAnalysisResult {
+	function analyze(
+		ts: typeof import('typescript'),
+		contents: string,
+		functionName: 'localize' | 'localize2',
+		options: ts.CompilerOptions = {}
+	): ILocalizeAnalysisResult {
 		const filename = 'file.ts';
 		const serviceHost = new SingleFileServiceHost(ts, Object.assign(clone(options), { noResolve: true }), filename, contents);
 		const service = ts.createLanguageService(serviceHost);
@@ -231,7 +236,7 @@ module _nls {
 			.map(n => <ts.CallExpression>n)
 
 			// only `localize` calls
-			.filter(n => n.expression.kind === ts.SyntaxKind.PropertyAccessExpression && (<ts.PropertyAccessExpression>n.expression).name.getText() === 'localize');
+			.filter(n => n.expression.kind === ts.SyntaxKind.PropertyAccessExpression && (<ts.PropertyAccessExpression>n.expression).name.getText() === functionName);
 
 		// `localize` named imports
 		const allLocalizeImportDeclarations = importDeclarations
@@ -241,14 +246,14 @@ module _nls {
 
 		// `localize` read-only references
 		const localizeReferences = allLocalizeImportDeclarations
-			.filter(d => d.name.getText() === 'localize')
+			.filter(d => d.name.getText() === functionName)
 			.map(n => service.getReferencesAtPosition(filename, n.pos + 1))
 			.flatten()
 			.filter(r => !r.isWriteAccess);
 
 		// custom named `localize` read-only references
 		const namedLocalizeReferences = allLocalizeImportDeclarations
-			.filter(d => d.propertyName && d.propertyName.getText() === 'localize')
+			.filter(d => d.propertyName && d.propertyName.getText() === functionName)
 			.map(n => service.getReferencesAtPosition(filename, n.name.pos + 1))
 			.flatten()
 			.filter(r => !r.isWriteAccess);
@@ -406,20 +411,21 @@ module _nls {
 	}
 
 	function patch(ts: typeof import('typescript'), moduleId: string, typescript: string, javascript: string, sourcemap: sm.RawSourceMap): INlsStringResult {
-		const { localizeCalls, nlsExpressions } = analyze(ts, typescript);
+		const { localizeCalls, nlsExpressions } = analyze(ts, typescript, 'localize');
+		const { localizeCalls: localize2Calls, nlsExpressions: nls2Expressions } = analyze(ts, typescript, 'localize2');
 
 		if (localizeCalls.length === 0) {
 			return { javascript, sourcemap };
 		}
 
-		const nlsKeys = template(localizeCalls.map(lc => lc.key));
-		const nls = template(localizeCalls.map(lc => lc.value));
+		const nlsKeys = template(localizeCalls.map(lc => lc.key).concat(localize2Calls.map(lc => lc.key)));
+		const nls = template(localizeCalls.map(lc => lc.value).concat(localize2Calls.map(lc => lc.value)));
 		const smc = new sm.SourceMapConsumer(sourcemap);
 		const positionFrom = mappedPositionFrom.bind(null, sourcemap.sources[0]);
 		let i = 0;
 
 		// build patches
-		const patches = lazy(localizeCalls)
+		const localizePatches = lazy(localizeCalls)
 			.map(lc => ([
 				{ range: lc.keySpan, content: '' + (i++) },
 				{ range: lc.valueSpan, content: 'null' }
@@ -429,14 +435,25 @@ module _nls {
 				const start = lcFrom(smc.generatedPositionFor(positionFrom(c.range.start)));
 				const end = lcFrom(smc.generatedPositionFor(positionFrom(c.range.end)));
 				return { span: { start, end }, content: c.content };
-			})
-			.toArray();
+			});
+
+		const localize2Patches = lazy(localize2Calls)
+			.map(lc => ([
+				{ range: lc.keySpan, content: '' + (i++) }
+			])).flatten()
+			.map<IPatch>(c => {
+				const start = lcFrom(smc.generatedPositionFor(positionFrom(c.range.start)));
+				const end = lcFrom(smc.generatedPositionFor(positionFrom(c.range.end)));
+				return { span: { start, end }, content: c.content };
+			});
+
+		const patches = localizePatches.concat(localize2Patches).toArray();
 
 		javascript = patchJavascript(patches, javascript, moduleId);
 
 		// since imports are not within the sourcemap information,
 		// we must do this MacGyver style
-		if (nlsExpressions.length) {
+		if (nlsExpressions.length || nls2Expressions.length) {
 			javascript = javascript.replace(/^define\(.*$/m, line => {
 				return line.replace(/(['"])vs\/nls\1/g, `$1vs/nls!${moduleId}$1`);
 			});

src/vs/nls.build.ts

@@ -16,6 +16,10 @@ export function localize(data: ILocalizeInfo | string, message: string, ...args:
 	throw new Error(`Not supported at build time!`);
 }
 
+export function localize2(data: ILocalizeInfo | string, message: string, ...args: (string | number | boolean | undefined | null)[]): never {
+	throw new Error(`Not supported at build time!`);
+}
+
 export function getConfiguredDefaultLocale(): string | undefined {
 	throw new Error(`Not supported at build time!`);
 }
@@ -25,7 +29,7 @@ export function getConfiguredDefaultLocale(): string | undefined {
  */
 export function load(name: string, req: AMDLoader.IRelativeRequire, load: AMDLoader.IPluginLoadCallback, config: AMDLoader.IConfigurationOptions): void {
 	if (!name || name.length === 0) {
-		load({ localize, getConfiguredDefaultLocale });
+		load({ localize, localize2, getConfiguredDefaultLocale });
 	} else {
 		req([name + '.nls', name + '.nls.keys'], function (messages: string[], keys: string[]) {
 			buildMap[name] = messages;

src/vs/nls.mock.ts

@@ -8,6 +8,11 @@ export interface ILocalizeInfo {
 	comment: string[];
 }
 
+interface ILocalizedString {
+	original: string;
+	value: string;
+}
+
 function _format(message: string, args: any[]): string {
 	let result: string;
 	if (args.length === 0) {
@@ -25,6 +30,14 @@ export function localize(data: ILocalizeInfo | string, message: string, ...args:
 	return _format(message, args);
 }
 
+export function localize2(data: ILocalizeInfo | string, message: string, ...args: any[]): ILocalizedString {
+	const res = _format(message, args);
+	return {
+		original: res,
+		value: res
+	};
+}
+
 export function getConfiguredDefaultLocale(_: string) {
 	return undefined;
 }

src/vs/nls.ts

@@ -30,6 +30,11 @@ export interface ILocalizeInfo {
 	comment: string[];
 }
 
+interface ILocalizedString {
+	original: string;
+	value: string;
+}
+
 interface ILocalizeFunc {
 	(info: ILocalizeInfo, message: string, ...args: (string | number | boolean | undefined | null)[]): string;
 	(key: string, message: string, ...args: (string | number | boolean | undefined | null)[]): string;
@@ -39,8 +44,18 @@ interface IBoundLocalizeFunc {
 	(idx: number, defaultValue: null): string;
 }
 
+interface ILocalize2Func {
+	(info: ILocalizeInfo, message: string, ...args: (string | number | boolean | undefined | null)[]): ILocalizedString;
+	(key: string, message: string, ...args: (string | number | boolean | undefined | null)[]): ILocalizedString;
+}
+
+interface IBoundLocalize2Func {
+	(idx: number, defaultValue: string): ILocalizedString;
+}
+
 interface IConsumerAPI {
 	localize: ILocalizeFunc | IBoundLocalizeFunc;
+	localize2: ILocalize2Func | IBoundLocalize2Func;
 	getConfiguredDefaultLocale(stringFromLocalizeCall: string): string | undefined;
 }
 
@@ -107,19 +122,38 @@ function createScopedLocalize(scope: string[]): IBoundLocalizeFunc {
 	};
 }
 
+function createScopedLocalize2(scope: string[]): IBoundLocalize2Func {
+	return (idx: number, defaultValue: string, ...args) => ({
+		value: _format(scope[idx], args),
+		original: _format(defaultValue, args)
+	});
+}
+
 /**
- * Localize a message.
+ * Marks a string to be localized. Returns the localized string.
  *
- * `message` can contain `{n}` notation where it is replaced by the nth value in `...args`
- * For example, `localize({ key: 'sayHello', comment: ['Welcomes user'] }, 'hello {0}', name)`
+ * @param info The {@linkcode ILocalizeInfo} which describes the id and comments associated with the localized string.
+ * @param message The string to localize
+ * @param args The arguments to the string
+ *
+ * @note `message` can contain `{n}` notation where it is replaced by the nth value in `...args`
+ * @example `localize({ key: 'sayHello', comment: ['Welcomes user'] }, 'hello {0}', name)`
+ *
+ * @returns string The localized string.
  */
 export function localize(info: ILocalizeInfo, message: string, ...args: (string | number | boolean | undefined | null)[]): string;
 
 /**
- * Localize a message.
+ * Marks a string to be localized. Returns the localized string.
+ *
+ * @param key The key to use for localizing the string
+ * @param message The string to localize
+ * @param args The arguments to the string
+ *
+ * @note `message` can contain `{n}` notation where it is replaced by the nth value in `...args`
+ * @example For example, `localize('sayHello', 'hello {0}', name)`
  *
- * `message` can contain `{n}` notation where it is replaced by the nth value in `...args`
- * For example, `localize('sayHello', 'hello {0}', name)`
+ * @returns string The localized string.
  */
 export function localize(key: string, message: string, ...args: (string | number | boolean | undefined | null)[]): string;
 
@@ -130,6 +164,47 @@ export function localize(data: ILocalizeInfo | string, message: string, ...args:
 	return _format(message, args);
 }
 
+/**
+ * Marks a string to be localized. Returns an {@linkcode ILocalizedString}
+ * which contains the localized string and the original string.
+ *
+ * @param info The {@linkcode ILocalizeInfo} which describes the id and comments associated with the localized string.
+ * @param message The string to localize
+ * @param args The arguments to the string
+ *
+ * @note `message` can contain `{n}` notation where it is replaced by the nth value in `...args`
+ * @example `localize2({ key: 'sayHello', comment: ['Welcomes user'] }, 'hello {0}', name)`
+ *
+ * @returns ILocalizedString which contains the localized string and the original string.
+ */
+export function localize2(info: ILocalizeInfo, message: string, ...args: (string | number | boolean | undefined | null)[]): ILocalizedString;
+
+/**
+ * Marks a string to be localized. Returns an {@linkcode ILocalizedString}
+ * which contains the localized string and the original string.
+ *
+ * @param key The key to use for localizing the string
+ * @param message The string to localize
+ * @param args The arguments to the string
+ *
+ * @note `message` can contain `{n}` notation where it is replaced by the nth value in `...args`
+ * @example `localize('sayHello', 'hello {0}', name)`
+ *
+ * @returns ILocalizedString which contains the localized string and the original string.
+ */
+export function localize2(key: string, message: string, ...args: (string | number | boolean | undefined | null)[]): ILocalizedString;
+
+/**
+ * @skipMangle
+ */
+export function localize2(data: ILocalizeInfo | string, message: string, ...args: (string | number | boolean | undefined | null)[]): ILocalizedString {
+	const original = _format(message, args);
+	return {
+		value: original,
+		original
+	};
+}
+
 /**
  *
  * @param stringFromLocalizeCall You must pass in a string that was returned from a `nls.localize()` call
@@ -159,6 +234,7 @@ export function setPseudoTranslation(value: boolean) {
 export function create(key: string, data: IBundledStrings & IConsumerAPI): IConsumerAPI {
 	return {
 		localize: createScopedLocalize(data[key]),
+		localize2: createScopedLocalize2(data[key]),
 		getConfiguredDefaultLocale: data.getConfiguredDefaultLocale ?? ((_: string) => undefined)
 	};
 }
@@ -173,8 +249,9 @@ export function load(name: string, req: AMDLoader.IRelativeRequire, load: AMDLoa
 		// TODO: We need to give back the mangled names here
 		return load({
 			localize: localize,
+			localize2: localize2,
 			getConfiguredDefaultLocale: () => pluginConfig.availableLanguages?.['*']
-		});
+		} as IConsumerAPI);
 	}
 	const language = pluginConfig.availableLanguages ? findLanguageForModule(pluginConfig.availableLanguages, name) : null;
 	const useDefaultLanguage = language === null || language === DEFAULT_TAG;
@@ -185,8 +262,10 @@ export function load(name: string, req: AMDLoader.IRelativeRequire, load: AMDLoa
 	const messagesLoaded = (messages: string[] | IBundledStrings) => {
 		if (Array.isArray(messages)) {
 			(messages as any as IConsumerAPI).localize = createScopedLocalize(messages);
+			(messages as any as IConsumerAPI).localize2 = createScopedLocalize2(messages);
 		} else {
 			(messages as any as IConsumerAPI).localize = createScopedLocalize(messages[name]);
+			(messages as any as IConsumerAPI).localize2 = createScopedLocalize2(messages[name]);
 		}
 		(messages as any as IConsumerAPI).getConfiguredDefaultLocale = () => pluginConfig.availableLanguages?.['*'];
 		load(messages);

src/vs/workbench/contrib/localization/common/localizationsActions.ts

@@ -3,7 +3,7 @@
  *  Licensed under the MIT License. See License.txt in the project root for license information.
  *--------------------------------------------------------------------------------------------*/
 
-import { localize } from 'vs/nls';
+import { localize, localize2 } from 'vs/nls';
 import { IQuickInputService, IQuickPickSeparator } from 'vs/platform/quickinput/common/quickInput';
 import { CancellationTokenSource } from 'vs/base/common/cancellation';
 import { DisposableStore } from 'vs/base/common/lifecycle';
@@ -15,12 +15,11 @@ import { IExtensionsWorkbenchService } from 'vs/workbench/contrib/extensions/com
 
 export class ConfigureDisplayLanguageAction extends Action2 {
 	public static readonly ID = 'workbench.action.configureLocale';
-	public static readonly LABEL = localize('configureLocale', "Configure Display Language");
 
 	constructor() {
 		super({
 			id: ConfigureDisplayLanguageAction.ID,
-			title: { original: 'Configure Display Language', value: ConfigureDisplayLanguageAction.LABEL },
+			title: localize2('configureLocale', "Configure Display Language"),
 			menu: {
 				id: MenuId.CommandPalette
 			}