Fixes #4170: Provide a setting to define the `locale`

src/main.js

@@ -10,6 +10,33 @@ var app = require('electron').app;
 var fs = require('fs');
 var path = require('path');
 
+function stripComments(content) {
+	var regexp = /("(?:[^\\\"]*(?:\\.)?)*")|('(?:[^\\\']*(?:\\.)?)*')|(\/\*(?:\r?\n|.)*?\*\/)|(\/{2,}.*?(?:(?:\r?\n)|$))/g;
+	var result = content.replace(regexp, function (match, m1, m2, m3, m4) {
+		// Only one of m1, m2, m3, m4 matches
+		if (m3) {
+			// A block comment. Replace with nothing
+			return '';
+		}
+		else if (m4) {
+			// A line comment. If it ends in \r?\n then keep it.
+			var length_1 = m4.length;
+			if (length_1 > 2 && m4[length_1 - 1] === '\n') {
+				return m4[length_1 - 2] === '\r' ? '\r\n' : '\n';
+			}
+			else {
+				return '';
+			}
+		}
+		else {
+			// We match a string
+			return match;
+		}
+	});
+	return result;
+};
+
+
 // Duplicated in ../index.html for the renderes.
 function getNLSConfiguration() {
 	var locale = undefined;
@@ -23,6 +50,21 @@ function getNLSConfiguration() {
 		}
 	}
 
+	if (!locale) {
+		var userData = app.getPath('userData');
+		localeConfig = path.join(userData, 'User', 'locale.json');
+		if (fs.existsSync(localeConfig)) {
+			try {
+				var content = stripComments(fs.readFileSync(localeConfig, 'utf8'));
+				value = JSON.parse(content).locale;
+				if (value && typeof value === 'string') {
+					locale = value;
+				}
+			} catch (e) {
+			}
+		}
+	}
+
 	if (locale === 'pseudo') {
 		return { locale: locale, availableLanguages: {}, pseudo: true }
 	}
@@ -72,10 +114,9 @@ app.on('open-file', function(event, path) {
 	global.macOpenFiles.push(path);
 });
 
-var nlsConfig = getNLSConfiguration();
-process.env['VSCODE_NLS_CONFIG'] = JSON.stringify(nlsConfig);
-
 // Load our code once ready
 app.once('ready', function() {
+	var nlsConfig = getNLSConfiguration();
+	process.env['VSCODE_NLS_CONFIG'] = JSON.stringify(nlsConfig);
 	require('./bootstrap-amd').bootstrap('vs/workbench/electron-main/main');
 });

src/vs/workbench/browser/actions/configureLocale.ts

+/*---------------------------------------------------------------------------------------------
+ *  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 { TPromise } from 'vs/base/common/winjs.base';
+import nls = require('vs/nls');
+import * as Path from 'vs/base/common/paths';
+import URI from 'vs/base/common/uri';
+import * as Labels from 'vs/base/common/labels';
+import { Action } from 'vs/base/common/actions';
+
+import { Registry } from 'vs/platform/platform';
+import { IWorkbenchActionRegistry, Extensions } from 'vs/workbench/common/actionRegistry';
+import { IWorkbenchEditorService } from 'vs/workbench/services/editor/common/editorService';
+import { IWorkspaceContextService } from 'vs/workbench/services/workspace/common/contextService';
+import { IEditor } from 'vs/platform/editor/common/editor';
+import { IFileService } from 'vs/platform/files/common/files';
+import { SyncActionDescriptor } from 'vs/platform/actions/common/actions';
+
+
+class ConfigureLocaleAction extends Action {
+	public static ID = 'workbench.action.configureLocale';
+	public static LABEL = nls.localize('configureLocale', "Configure Locale");
+
+	private static DEFAULT_CONTENT: string = [
+		'{',
+		`\t// ${nls.localize('displayLanguage', 'Defines VSCode\'s display language.')}`,
+		`\t// ${nls.localize('restart', 'Changing the value requires to restart VSCode.')}`,
+		`\t"locale":"en-US"`,
+		'}'
+	].join('\n');
+
+	constructor(id, label,
+		@IFileService private fileService: IFileService,
+		@IWorkspaceContextService private contextService: IWorkspaceContextService,
+		@IWorkbenchEditorService private editorService: IWorkbenchEditorService
+	) {
+		super(id, label);
+	}
+
+	public run(event?: any): TPromise<IEditor> {
+		let file = URI.file(Path.join(this.contextService.getConfiguration().env.appSettingsHome, 'locale.json'));
+		return this.fileService.resolveFile(file).then(null, (error) => {
+			return this.fileService.createFile(file, ConfigureLocaleAction.DEFAULT_CONTENT);
+		}).then((stat) => {
+			if (!stat) {
+				return;
+			}
+			return this.editorService.openEditor({
+				resource: stat.resource,
+				options: {
+					forceOpen: true
+				}
+			});
+		}, (error) => {
+			throw new Error(nls.localize('fail.createSettings', "Unable to create '{0}' ({1}).", Labels.getPathLabel(file, this.contextService), error));
+		});
+	}
+}
+
+let workbenchActionsRegistry = <IWorkbenchActionRegistry>Registry.as(Extensions.WorkbenchActions);
+workbenchActionsRegistry.registerWorkbenchAction(new SyncActionDescriptor(ConfigureLocaleAction, ConfigureLocaleAction.ID, ConfigureLocaleAction.LABEL));

src/vs/workbench/workbench.main.js

@@ -30,6 +30,7 @@ define([
 	'vs/workbench/browser/actions/triggerNavigation',
 	'vs/workbench/browser/actions/showPerformanceBox',
 	'vs/workbench/browser/actions/openSettings',
+	'vs/workbench/browser/actions/configureLocale',
 
 	'vs/workbench/parts/quickopen/browser/quickopen.contribution',