MD Settings: Replace language detail page with dropdown menu items

chrome/browser/resources/settings/languages_page/language_detail_page.js

-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-/**
- * @fileoverview 'settings-language-detail-page' is a sub-page for editing
- * an individual language's settings.
- */
-Polymer({
-  is: 'settings-language-detail-page',
-
-  properties: {
-    /**
-     * Preferences state.
-     */
-    prefs: {
-      type: Object,
-      notify: true,
-    },
-
-    /**
-     * Read-only reference to the languages model provided by the
-     * 'settings-languages' instance.
-     * @type {!LanguagesModel|undefined}
-     */
-    languages: Object,
-
-    /** @type {!LanguageHelper} */
-    languageHelper: Object,
-
-    /**
-     * The language to display the details for.
-     * @type {!LanguageState|undefined}
-     */
-    detail: Object,
-  },
-
-  /** @override */
-  ready: function() {
-    // In a CrOS multi-user session, the primary user controls the UI language.
-    if (this.isSecondaryUser_()) {
-      var indicator = this.$.policyIndicator;
-      indicator.indicatorType = CrPolicyIndicatorType.PRIMARY_USER;
-      indicator.controllingUser = loadTimeData.getString('primaryUserEmail');
-    }
-
-    // The UI language choice doesn't persist for guests.
-    if (cr.isChromeOS &&
-        (uiAccountTweaks.UIAccountTweaks.loggedInAsGuest() ||
-         uiAccountTweaks.UIAccountTweaks.loggedInAsPublicAccount())) {
-      this.$.languageSettings.hidden = true;
-    }
-  },
-
-  /**
-   * Checks whether the prospective UI language (the pref that indicates what
-   * language to use in Chrome) matches the current language. This pref is only
-   * on Chrome OS and Windows; we don't control the UI language elsewhere.
-   * @param {string} languageCode The language code identifying a language.
-   * @param {string} prospectiveUILanguage The prospective UI language.
-   * @return {boolean} True if the given language matches the prospective UI
-   *     pref (which may be different from the actual UI language).
-   * @private
-   */
-  isProspectiveUILanguage_: function(languageCode, prospectiveUILanguage) {
-    assert(cr.isChromeOS || cr.isWindows);
-    return languageCode == this.languageHelper.getProspectiveUILanguage();
-  },
-
-  /**
-   * @param {string} languageCode The language code identifying a language.
-   * @param {string} prospectiveUILanguage The prospective UI language.
-   * @return {boolean} True if the the given language, the prospective UI
-   *     language and the actual language all the same.
-   * @private
-   */
-  isCurrentUILanguage_: function(languageCode, prospectiveUILanguage) {
-    assert(cr.isChromeOS || cr.isWindows);
-    return languageCode == prospectiveUILanguage &&
-           languageCode == navigator.language;
-  },
-
-   /**
-   * @param {string} languageCode The language code identifying a language.
-   * @param {string} targetLanguageCode The default translate target language.
-   * @return {boolean} True if the language code matches the target language.
-   * @private
-   */
-  isTranslateDisabled_: function(languageCode, targetLanguageCode) {
-    return this.languageHelper.convertLanguageCodeForTranslate(languageCode) ==
-        targetLanguageCode;
-  },
-
-   /**
-   * @param {string} languageCode The language code identifying a language.
-   * @param {string} prospectiveUILanguage The prospective UI language.
-   * @return {boolean} True if the prospective UI language is set to
-   *     |languageCode| but requires a restart to take effect.
-   * @private
-   */
-  isRestartRequired_: function(languageCode, prospectiveUILanguage) {
-    return prospectiveUILanguage == languageCode &&
-           navigator.language != languageCode;
-  },
-
-  /**
-   * @param {string} languageCode The language code identifying a language.
-   * @param {string} prospectiveUILanguage The chosen UI language.
-   * @return {boolean} True if the chosen language cannot currently be changed.
-   * @private
-   */
-  isUILanguageChangeDisabled_: function(languageCode, prospectiveUILanguage) {
-    // UI language setting belongs to the primary user.
-    if (this.isSecondaryUser_())
-      return true;
-    // If this is both the actual and the prospective language, flipping the
-    // toggle button to "off" makes no sense.
-    return this.isCurrentUILanguage_(languageCode, prospectiveUILanguage);
-  },
-
-  /**
-   * @return {boolean} True for a secondary user in a multi-profile session.
-   * @private
-   */
-  isSecondaryUser_: function() {
-    return cr.isChromeOS && loadTimeData.getBoolean('isSecondaryUser');
-  },
-
-  /**
-   * @param {string} languageCode The language code identifying a language.
-   * @param {boolean} translateEnabled Whether translate is enabled.
-   * @return {boolean} True if the translate section should be hidden.
-   * @private
-   */
-  shouldHideTranslate_: function(languageCode, translateEnabled) {
-    // Translate server supports Chinese (Traditional) and Chinese (Simplified)
-    // but not 'general' Chinese. To avoid ambiguity, hide the translate
-    // checkbox when general Chinese is selected.
-    return !translateEnabled || languageCode == 'zh';
-  },
-
-  /**
-   * Handler for changes to the translate checkbox.
-   * @param {!{target: !{checked: boolean}}} e
-   * @private
-   */
-  onTranslateEnabledChange_: function(e) {
-    if (e.target.checked)
-      this.languageHelper.enableTranslateLanguage(this.detail.language.code);
-    else
-      this.languageHelper.disableTranslateLanguage(this.detail.language.code);
-  },
-
-  /**
-   * Handler for changes to the UI language toggle button.
-   * @param {!{target: !{checked: boolean}}} e
-   * @private
-   */
-  onUILanguageChange_: function(e) {
-    if (e.target.checked) {
-      this.languageHelper.setUILanguage(this.detail.language.code);
-    } else {
-      // Reset the chosen UI language to the actual UI language.
-      this.languageHelper.resetUILanguage();
-    }
-  },
-
-  /**
-   * Handler for the restart button.
-   * @private
-   */
-  onRestartTap_: function() {
-<if expr="chromeos">
-    settings.LifetimeBrowserProxyImpl.getInstance().signOutAndRestart();
-</if>
-<if expr="not chromeos">
-    settings.LifetimeBrowserProxyImpl.getInstance().restart();
-</if>
-  },
-});