Add locale switcher to Advanced prefs

Closes https://www.zotero.org/trac/ticket/1733 (!)

chrome/content/zotero/preferences/preferences_advanced.js

@@ -23,7 +23,7 @@
     ***** END LICENSE BLOCK *****
 */
 
-"use strict";
+Components.utils.import("resource://gre/modules/Services.jsm");
 
 Zotero_Preferences.Advanced = {
 	_openURLResolvers: null,
@@ -34,6 +34,7 @@ Zotero_Preferences.Advanced = {
 		Zotero_Preferences.Keys.init();
 
 		this.onDataDirLoad();
+		this.refreshLocale();
 	},
 
 
@@ -405,6 +406,84 @@ Zotero_Preferences.Advanced = {
 
 	onOpenURLCustomized: function () {
 		document.getElementById('openURLMenu').value = "custom";
+	},
+
+
+	_getAutomaticLocaleMenuLabel: function () {
+		return Zotero.getString(
+			'zotero.preferences.locale.automaticWithLocale',
+			Zotero.Locale.availableLocales[Zotero.locale] || Zotero.locale
+		);
+	},
+
+
+	refreshLocale: function () {
+		var matchOS = Zotero.Prefs.get('intl.locale.matchOS', true);
+		var autoLocaleName, currentValue;
+
+		// If matching OS, get the name of the current locale
+		if (matchOS) {
+			autoLocaleName = this._getAutomaticLocaleMenuLabel();
+			currentValue = 'automatic';
+		}
+		// Otherwise get the name of the locale specified in the pref
+		else {
+			let branch = Services.prefs.getBranch("");
+			let locale = branch.getComplexValue(
+				'general.useragent.locale', Components.interfaces.nsIPrefLocalizedString
+			);
+			autoLocaleName = Zotero.getString('zotero.preferences.locale.automatic');
+			currentValue = locale;
+		}
+
+		// Populate menu
+		var menu = document.getElementById('locale-menu');
+		var menupopup = menu.firstChild;
+		menupopup.textContent = '';
+		// Show "Automatic (English)", "Automatic (Français)", etc.
+		menu.appendItem(autoLocaleName, 'automatic');
+		menu.menupopup.appendChild(document.createElement('menuseparator'));
+		// Add all available locales
+		for (let locale in Zotero.Locale.availableLocales) {
+			menu.appendItem(Zotero.Locale.availableLocales[locale], locale);
+		}
+		menu.value = currentValue;
+	},
+
+	onLocaleChange: function () {
+		var menu = document.getElementById('locale-menu');
+		if (menu.value == 'automatic') {
+			// Changed if not already set to automatic (unless we have the automatic locale name,
+			// meaning we just switched away to the same manual locale and back to automatic)
+			var changed = !Zotero.Prefs.get('intl.locale.matchOS', true)
+				&& menu.label != this._getAutomaticLocaleMenuLabel();
+			Zotero.Prefs.set('intl.locale.matchOS', true, true);
+		}
+		else {
+			// Changed if moving to a locale other than the current one
+			var changed = Zotero.locale != menu.value
+			Zotero.Prefs.set('intl.locale.matchOS', false, true);
+			Zotero.Prefs.set('general.useragent.locale', menu.value, true);
+		}
+
+		if (!changed) {
+			return;
+		}
+
+		var ps = Services.prompt;
+		var buttonFlags = ps.BUTTON_POS_0 * ps.BUTTON_TITLE_IS_STRING
+			+ ps.BUTTON_POS_1 * ps.BUTTON_TITLE_IS_STRING;
+		var index = ps.confirmEx(null,
+			Zotero.getString('general.restartRequired'),
+			Zotero.getString('general.restartRequiredForChange', Zotero.appName),
+			buttonFlags,
+			Zotero.getString('general.restartNow'),
+			Zotero.getString('general.restartLater'),
+			null, null, {});
+
+		if (index == 0) {
+			Zotero.Utilities.Internal.quitZotero(true);
+		}
 	}
 };
 

chrome/content/zotero/preferences/preferences_advanced.xul

@@ -133,6 +133,17 @@
 
 					<groupbox id="zotero-prefpane-advanced-miscellaneous">
 						<caption label="&zotero.preferences.miscellaneous;"/>
+
+						<hbox align="center">
+							<label value="&zotero.bibliography.locale.label;"/>
+							<menulist id="locale-menu"
+									oncommand="Zotero_Preferences.Advanced.onLocaleChange()">
+								<menupopup/>
+							</menulist>
+						</hbox>
+
+						<separator/>
+
 						<hbox id="zotero-prefpane-advanced-openbuttons" align="center" style="display: block">
 							<button id="openAboutConfig"
 								label="&zotero.preferences.openAboutConfig;"

chrome/content/zotero/xpcom/locale.js

@@ -0,0 +1,44 @@
+Zotero.Locale = {
+	/**
+	 * Keep this up to date with chrome.manifest
+	 */
+	availableLocales: Object.freeze({
+		'ar': 'عربي',
+		'bg-BG': 'Български',
+		'ca-AD': 'Català',
+		'cs-CZ': 'Čeština',
+		'da-DK': 'Dansk',
+		'de': 'Deutsch',
+		'en-US': 'English',
+		'es-ES': 'Español',
+		'et-EE': 'Eesti keel',
+		'fa': 'فارسی',
+		'fi': 'suomi',
+		'fr': 'Français',
+		'gl-ES': 'Galego',
+		'hu-HU': 'magyar',
+		'id-ID': 'Bahasa Indonesia',
+		'is-IS': 'íslenska',
+		'it-IT': 'Italiano',
+		'ja-JP': '日本語',
+		'km': 'ខ្មែរ',
+		'ko-KR': '한국어',
+		'lt-LT': 'Lietuvių',
+		'nl-NL': 'Nederlands',
+		'pl-PL': 'Polski',
+		'pt-BR': 'Português (do Brasil)',
+		'pt-PT': 'Português (Europeu)',
+		'ro-RO': 'Română',
+		'ru-RU': 'Русский',
+		'sk-SK': 'slovenčina',
+		'sl-SI': 'Slovenščina',
+		'sr-RS': 'Српски',
+		'sv-SE': 'Svenska',
+		'th-TH': 'ไทย',
+		'tr-TR': 'Türkçe',
+		'uk-UA': 'Українська',
+		'vi-VN': 'Tiếng Việt',
+		'zh-CN': '中文 (简体)',
+		'zh-TW': '正體中文 (繁體)'
+	})
+}

chrome/locale/en-US/zotero/zotero.properties

@@ -603,6 +603,8 @@ zotero.preferences.launchNonNativeFiles                   = Open PDFs and other
 zotero.preferences.openurl.resolversFound.zero			= %S resolvers found
 zotero.preferences.openurl.resolversFound.singular		= %S resolver found
 zotero.preferences.openurl.resolversFound.plural			= %S resolvers found
+zotero.preferences.locale.automaticWithLocale = Automatic (%S)
+zotero.preferences.locale.automatic = Automatic
 
 zotero.preferences.sync.purgeStorage.title			= Purge Attachment Files on Zotero Servers?
 zotero.preferences.sync.purgeStorage.desc			= If you plan to use WebDAV for file syncing and you previously synced attachment files in My Library to the Zotero servers, you can purge those files from the Zotero servers to give you more storage space for groups.\n\nYou can purge files at any time from your account settings on zotero.org.

chrome/skin/default/zotero/preferences.css

@@ -26,7 +26,8 @@ radio[pane]
 
 .statusLine
 {
-	margin: .75em 0;
+	margin-top: .75em;
+	margin-bottom: .75em;
 	font-size: .85em;
 }
 

components/zotero-service.js

@@ -96,6 +96,7 @@ const xpcomFilesLocal = [
 	'id',
 	'integration',
 	'itemTreeView',
+	'locale',
 	'locateManager',
 	'mime',
 	'notifier',
@@ -297,7 +298,7 @@ function makeZoteroContext(isConnector) {
 	// Load xpcomFiles for specific mode
 	for (let xpcomFile of (isConnector ? xpcomFilesConnector : xpcomFilesLocal)) {
 		try {
-			subscriptLoader.loadSubScript("chrome://zotero/content/xpcom/" + xpcomFile + ".js", zContext);
+			subscriptLoader.loadSubScript("chrome://zotero/content/xpcom/" + xpcomFile + ".js", zContext, "UTF-8");
 		}
 		catch (e) {
 			dump("Error loading " + xpcomFile + ".js\n\n");