pref-languages.js - mozsearch

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/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* 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/. */

var gActiveLanguages;

var gLanguages;

var gLanguageNames = [];

var gLanguageTitles = {};

function Startup()

  gActiveLanguages = document.getElementById("activeLanguages");

  // gLanguages stores the ordered list of languages, due to the nature

  // of childNodes it is live and updates automatically.

  gLanguages = gActiveLanguages.childNodes;

  ReadAvailableLanguages();

function AddLanguage()

  document.documentElement.openSubDialog("chrome://communicator/content/pref/pref-languages-add.xul", "addlangwindow", gLanguageNames);

function ReadAvailableLanguages()

  var i = 0;

  var languagesBundle = document.getElementById("languageNamesBundle");

  var prefLangBundle = document.getElementById("prefLangBundle");

  var regionsBundle = document.getElementById("regionNamesBundle");

  var langStrings = document.getElementById("acceptedBundle").strings;

  while (langStrings.hasMoreElements())

    // Progress through the bundle.

    var curItem = langStrings.getNext();

    if (!(curItem instanceof Ci.nsIPropertyElement))

      break;

    var stringNameProperty = curItem.key.split('.');

    var str = stringNameProperty[0];

    if (str && stringNameProperty[1] == 'accept')

      var stringLangRegion = str.split('-');

      if (stringLangRegion[0])

        var language = "";

        var region = null;

try

          language = languagesBundle.getString(stringLangRegion[0]);

        catch (ex) {}

        if (stringLangRegion.length > 1)

try

            region = regionsBundle.getString(stringLangRegion[1]);

          catch (ex) {}

        var title;

        if (region)

          title = prefLangBundle.getFormattedString("languageRegionCodeFormat",

                                                    [language, region, str]);

        else

          title = prefLangBundle.getFormattedString("languageCodeFormat",

                                                    [language, str]);

        gLanguageTitles[str] = title;

        if (curItem.value == "true")

          gLanguageNames.push([title, str]);

  // Sort on first element.

  gLanguageNames.sort(

    function compareFn(a, b)

      return a[0].localeCompare(b[0]);

);

function ReadActiveLanguages()

  var arrayOfPrefs = document.getElementById("intl.accept_languages").value

                             .toLowerCase().split(/\s*,\s*/);

  // No need to rebuild listitems if languages in prefs and listitems match.

  if (InSync(arrayOfPrefs))

   return;

  while (gActiveLanguages.hasChildNodes())

    gActiveLanguages.lastChild.remove();

  arrayOfPrefs.forEach(

    function(aKey)

      if (aKey)

        let langTitle = gLanguageTitles.hasOwnProperty(aKey) ?

                        gLanguageTitles[aKey] : "[" + aKey + "]";

        gActiveLanguages.appendItem(langTitle, aKey);

);

  SelectLanguage();

  return;

// Checks whether listitems and pref values matches, returns false if not.

function InSync(aPrefArray)

  // Can't match if they don't have the same length.

  if (aPrefArray.length != gLanguages.length)

    return false;

  return aPrefArray.every(

    function(aElement, aIndex)

      return aElement == gLanguages[aIndex].value;

);

// Called on onsynctopreference.

function WriteActiveLanguages()

  return Array.from(gLanguages, e => e.value).join(",");

function MoveUp()

  var selected = gActiveLanguages.selectedItem;

  var before = selected.previousSibling;

  if (before)

    before.parentNode.insertBefore(selected, before);

    gActiveLanguages.selectItem(selected);

    gActiveLanguages.ensureElementIsVisible(selected);

  SelectLanguage();

  gActiveLanguages.doCommand();

function MoveDown()

  var selected = gActiveLanguages.selectedItem;

  if (selected.nextSibling)

    var before = selected.nextSibling.nextSibling;

    gActiveLanguages.insertBefore(selected, before);

    gActiveLanguages.selectItem(selected);

  SelectLanguage();

  gActiveLanguages.doCommand();

function RemoveActiveLanguage(aEvent)

  if (aEvent && aEvent.keyCode != aEvent.DOM_VK_DELETE &&

      aEvent.keyCode != aEvent.DOM_VK_BACK_SPACE)

    return;

  var nextNode = null;

  while (gActiveLanguages.selectedItem)

    var selectedNode = gActiveLanguages.selectedItem;

    nextNode = selectedNode.nextSibling || selectedNode.previousSibling;

    selectedNode.remove();

  if (nextNode)

    gActiveLanguages.selectItem(nextNode);

  SelectLanguage();

  gActiveLanguages.doCommand();

function SelectLanguage()

  var len = gActiveLanguages.selectedItems.length;

  EnableElementById("langRemove", len, false);

  var selected = gActiveLanguages.selectedItem;

  EnableElementById("langDown", (len == 1) && selected.nextSibling, false);

  EnableElementById("langUp", (len == 1) && selected.previousSibling, false);