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

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+define(function(require) {
+  'use strict';
+
+  // AMD modules
+  var SettingsCache = require('modules/settings_cache');
+  var KeyboardHelper = require('shared/keyboard_helper');
+  var LanguageList = require('shared/language_list');
+  // import this to update time format while laungage changed
+  require('modules/date_time');
+
+  var Languages = function() {};
+
+  Languages.prototype = {
+    buildList: function() {
+      LanguageList.get(function fillList(languages, currentLang) {
+        var options = document.createDocumentFragment();
+        for (var lang in languages) {
+          var isCurrent = (lang === currentLang);
+          var option = document.createElement('option');
+          option.value = lang;
+          option.innerHTML = LanguageList.wrapBidi(lang, languages[lang]);
+          option.selected = isCurrent;
+          options.appendChild(option);
+        }
+        this.elements.langSel.innerHTML = '';
+        this.elements.langSel.appendChild(options);
+      }.bind(this));
+    },
+    updateDateTime: function() {
+      // update the date and time samples in the 'languages' panel
+      if (this.panel.children.length) {
+        var d = new Date();
+        var dateString = d.toLocaleString(navigator.languages, {
+          weekday: 'long',
+          day: 'numeric',
+          month: 'long',
+          year: 'numeric'
+        });
+        var timeString = d.toLocaleString(navigator.languages, {
+          hour12: navigator.mozHour12,
+          hour: 'numeric',
+          minute: 'numeric'
+        });
+        this.panel.querySelector('#region-date').textContent = dateString;
+        this.panel.querySelector('#region-time').textContent = timeString;
+      }
+    },
+    showMoreLanguages: function() {
+      this.elements.moreLanguages.blur();
+      SettingsCache.getSettings(function(result) {
+        var version = result['langpack.channel'];
+        /* jshint nonew: false */
+        new window.MozActivity({
+          name: 'marketplace-category',
+          data: {
+            slug: 'langpacks',
+            // Marketplace expects major.minor
+            fxos_version: version.split('.').slice(0, 2).join('.')
+          }
+        });
+      });
+    },
+    onInit: function(panel, elements) {
+      this.panel = panel;
+      this.elements = elements;
+
+      // Installing additional languages is only available on phones for now;
+      // see https://bugzil.la/1124098.  On other device types the link to the
+      // Marketpace is hidden.  Don't set the handler if it's display: none.
+      if (this.elements.moreLanguages.offsetParent) {
+        this.elements.moreLanguages.addEventListener('click',
+          this.showMoreLanguages.bind(this));
+      }
+      this.elements.langSel.addEventListener('blur',
+        this.buildList.bind(this));
+      this.elements.langSel.addEventListener('change', function() {
+        var lang = this.elements.langSel.value;
+        navigator.mozSettings.createLock().set({'language.current': lang});
+        if (navigator.mozL10n && navigator.mozL10n.language) {
+          navigator.mozL10n.language.code = lang;
+        }
+      }.bind(this));
+    },
+    onLocalized: function() {
+      // update keyboard layout
+      var lang = document.documentElement.lang;
+      KeyboardHelper.changeDefaultLayouts(lang);
+
+      // update the format example UI
+      this.updateDateTime();
+    }
+  };
+
+  return function ctor_languages() {
+    return new Languages();
+  };
+});

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);
+      }
+    });
+  };
+});