Bug 1481852 - Port bug 1469684 to TB: Allow users to switch to an installed locale. r=jorgk

--HG--
extra : rebase_source : f9bfef9bcae8ef76bf99423e213a24b82b55dc51

mail/app/profile/all-thunderbird.js

@@ -836,3 +836,6 @@ pref("security.sandbox.content.level", 0);
 
 // Enable FIDO U2F
 pref("security.webauth.u2f", true);
+
+// Multi-lingual preferences
+pref("intl.multilingual.enabled", false);

mail/branding/nightly/locales/en-US/brand.ftl

@@ -0,0 +1,15 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+## Thunderbird Brand
+##
+## Thunderbird must be treated as a brand, and kept in English.
+## It cannot be:
+## - Transliterated.
+## - Translated.
+##
+## Reference: https://www.mozilla.org/styleguide/communications/translation/
+
+-brand-short-name = Daily
+-vendor-short-name = mozilla.org

mail/branding/nightly/locales/jar.mn

@@ -3,6 +3,9 @@
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
+[localization] @AB_CD@.jar:
+  branding                                 (en-US/**/*.ftl)
+
 
 @AB_CD@.jar:
 % locale branding @AB_CD@ %locale/branding/

mail/branding/thunderbird/locales/en-US/brand.ftl

@@ -0,0 +1,15 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+## Thunderbird Brand
+##
+## Thunderbird must be treated as a brand, and kept in English.
+## It cannot be:
+## - Transliterated.
+## - Translated.
+##
+## Reference: https://www.mozilla.org/styleguide/communications/translation/
+
+-brand-short-name = Thunderbird
+-vendor-short-name = Mozilla

mail/branding/thunderbird/locales/jar.mn

@@ -1,4 +1,10 @@
 #filter substitution
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+[localization] @AB_CD@.jar:
+  branding                                 (en-US/**/*.ftl)
 
 @AB_CD@.jar:
 % locale branding @AB_CD@ %locale/@AB_CD@/branding/

mail/components/preferences/aboutPreferences.xul

@@ -34,6 +34,8 @@
   <stringbundle id="bundleBrand" src="chrome://branding/locale/brand.properties"/>
   <stringbundle id="bundlePreferences"
                 src="chrome://messenger/locale/preferences/preferences.properties"/>
+  <link rel="localization" href="branding/brand.ftl"/>
+  <link rel="localization" href="messenger/preferences/preferences.ftl"/>
   <link rel="localization" href="messenger/preferences/fonts.ftl"/>
   <script type="application/javascript" src="chrome://global/content/l10n.js"/>
 

mail/components/preferences/advanced.inc.xul

@@ -183,6 +183,32 @@
             </hbox>
           </groupbox>
 
+          <groupbox id="messengerLanguagesBox" hidden="true">
+            <caption label="&languageSelector.label;"/>
+             <vbox align="start">
+              <description flex="1"
+                           controls="chooseMessengerLanguage"
+                           data-l10n-id="choose-messenger-language-description"/>
+              <menulist id="defaultMessengerLanguage"
+                        class="accessory-button"
+                        flex="1"
+                        oncommand="gAdvancedPane.onLanguageChange(event)">
+                <menupopup/>
+              </menulist>
+            </vbox>
+            <hbox id="confirmMessengerLanguage"
+                  class="message-bar"
+                  align="center"
+                  hidden="true">
+              <image class="message-bar-icon"/>
+              <hbox class="message-bar-content" align="center" flex="1">
+                <description flex="1"/>
+                <button class="message-bar-button"
+                        oncommand="gAdvancedPane.confirmLanguageChange()"/>
+              </hbox>
+            </hbox>
+          </groupbox>
+
 #ifdef HAVE_SHELL_SERVICE
           <groupbox id="systemDefaultsGroup" orient="vertical">
             <caption label="&systemIntegration.label;"/>

mail/components/preferences/advanced.js

@@ -8,6 +8,8 @@ ChromeUtils.import("resource://gre/modules/DownloadUtils.jsm");
 ChromeUtils.import("resource://gre/modules/XPCOMUtils.jsm");
 ChromeUtils.import("resource://gre/modules/AppConstants.jsm");
 ChromeUtils.import("resource://gre/modules/Services.jsm");
+ChromeUtils.import("resource://gre/modules/L10nRegistry.jsm");
+ChromeUtils.import("resource://gre/modules/Localization.jsm");
 
 var gAdvancedPane = {
   mPane: null,
@@ -22,6 +24,10 @@ var gAdvancedPane = {
     this.mBundle = document.getElementById("bundlePreferences");
     this.formatLocaleSetLabels();
 
+    if (Services.prefs.getBoolPref("intl.multilingual.enabled")) {
+      this.initMessengerLocale();
+    }
+
     if (!(("arguments" in window) && window.arguments[1]))
     {
       // If no tab was specified, select the last used tab.
@@ -533,4 +539,69 @@ updateWritePrefs: function ()
     appLocaleRadio.accessKey = this.mBundle.getString("appLocale.accesskey");
     rsLocaleRadio.accessKey = this.mBundle.getString("rsLocale.accesskey");
   },
+
+  // Load the preferences string bundle for a given locale.
+  getBundleForLocale(locale) {
+    function generateContexts(resourceIds) {
+      return L10nRegistry.generateContexts([locale], resourceIds);
+    }
+    return new Localization([
+      "messenger/preferences/preferences.ftl",
+      "branding/brand.ftl",
+    ], generateContexts);
+  },
+
+  initMessengerLocale() {
+    let localeCodes = Services.locale.getAvailableLocales();
+    let localeNames = Services.intl.getLocaleDisplayNames(undefined, localeCodes);
+    let locales = localeCodes.map((code, i) => ({code, name: localeNames[i]}));
+    locales.sort((a, b) => a.name > b.name);
+
+    let fragment = document.createDocumentFragment();
+    for (let {code, name} of locales) {
+      let menuitem = document.createElement("menuitem");
+      menuitem.setAttribute("value", code);
+      menuitem.setAttribute("label", name);
+      fragment.appendChild(menuitem);
+    }
+    let menulist = document.getElementById("defaultMessengerLanguage");
+    let menupopup = menulist.querySelector("menupopup");
+    menupopup.appendChild(fragment);
+    menulist.value = Services.locale.getRequestedLocale();
+
+    document.getElementById("messengerLanguagesBox").hidden = false;
+  },
+
+  /* Show the confirmation message bar to allow a restart into the new language. */
+  async onLanguageChange(event) {
+    let locale = event.target.value;
+    let messageBar = document.getElementById("confirmMessengerLanguage");
+    if (locale == Services.locale.getRequestedLocale()) {
+      messageBar.hidden = true;
+      return;
+    }
+    // Set the text in the message bar for the new locale.
+    let newBundle = this.getBundleForLocale(locale);
+    let description = messageBar.querySelector("description");
+    description.textContent = await newBundle.formatValue(
+      "confirm-messenger-language-change-description");
+    let button = messageBar.querySelector("button");
+    button.setAttribute(
+      "label", await newBundle.formatValue(
+        "confirm-messenger-language-change-button"));
+    messageBar.hidden = false;
+  },
+
+  /* Confirm the locale change and restart the Thunderbird in the new locale. */
+  confirmLanguageChange() {
+    let locale = document.getElementById("defaultMessengerLanguage").value;
+    Services.locale.setRequestedLocales([locale]);
+
+    // Restart with the new locale.
+    let cancelQuit = Cc["@mozilla.org/supports-PRBool;1"].createInstance(Ci.nsISupportsPRBool);
+    Services.obs.notifyObservers(cancelQuit, "quit-application-requested", "restart");
+    if (!cancelQuit.data) {
+      Services.startup.quit(Services.startup.eAttemptQuit | Services.startup.eRestart);
+    }
+  },
 };

mail/locales/en-US/chrome/messenger/preferences/advanced.dtd

@@ -12,6 +12,7 @@
 <!ENTITY enableGlodaSearch.label       "Enable Global Search and Indexer">
 <!ENTITY enableGlodaSearch.accesskey   "G">
 <!ENTITY dateTimeFormatting.label      "Date and Time Formatting">
+<!ENTITY languageSelector.label        "Language">
 <!ENTITY allowHWAccel.label            "Use hardware acceleration when available">
 <!ENTITY allowHWAccel.accesskey        "h">
 <!ENTITY storeType.label               "Message Store Type for new accounts:">

mail/locales/en-US/messenger/preferences/preferences.ftl

@@ -0,0 +1,7 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+choose-messenger-language-description = Choose the languages used to display menus, messages, and notifications from { -brand-short-name }.
+confirm-messenger-language-change-description = Restart { -brand-short-name } to apply these changes
+confirm-messenger-language-change-button = Apply and Restart

mail/themes/shared/mail/incontentprefs/aboutPreferences.css

@@ -402,6 +402,10 @@ richlistbox:focus > richlistitem[selected="true"] {
   color: var(--in-content-selected-text) !important;
 }
 
+#defaultMessengerLanguage {
+  min-width: 20em;
+}
+
 /**
  * Dialog
  */