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gaia/apps/settings/js/panels/languages/panel.js

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+'use strict';
+
+define(function(require) {
+  var SettingsPanel = require('modules/settings_panel');
+  var Languages = require('panels/languages/languages');
+
+  return function ctor_languages_panel() {
+    var languages = Languages();
+    var onLocalized = languages.onLocalized.bind(languages);
+    var onAdditionalLanguagesChange = languages.buildList.bind(languages);
+
+    return SettingsPanel({
+      onBeforeShow: function() {
+        languages.buildList();
+        languages.updateDateTime();
+        document.addEventListener('DOMRetranslated', onLocalized);
+        navigator.mozSettings.addObserver(
+          'accessibility.screenreader', onAdditionalLanguagesChange);
+        document.addEventListener(
+          'additionallanguageschange', onAdditionalLanguagesChange);
+      },
+      onBeforeHide: function() {
+        document.removeEventListener('DOMRetranslated', onLocalized);
+        navigator.mozSettings.removeObserver(
+          'accessibility.screenreader', onAdditionalLanguagesChange);
+        document.removeEventListener(
+          'additionallanguageschange', onAdditionalLanguagesChange);
+      },
+      onInit: function(panel) {
+        var elements = {
+          moreLanguages: panel.querySelector('.menuItem-more-languages'),
+          langSel: panel.querySelector('select[name="language.current"]')
+        };
+        languages.onInit(panel, elements);
+      }
+    });
+  };
+});