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

 /* 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 gLanguagesDialog = {

   _availableLanguagesList : [],

   _acceptLanguages        : { },

   _selectedItemID         : null,

   init: function ()

   {

     if (!this._availableLanguagesList.length)

       this._loadAvailableLanguages();

   },

   get _activeLanguages()

   {

     return document.getElementById("activeLanguages");

   },

   get _availableLanguages()

   {

     return document.getElementById("availableLanguages");

   },

   _loadAvailableLanguages: function ()

   {

     // This is a parser for: resource://gre/res/language.properties

     // The file is formatted like so:

     // ab[-cd].accept=true|false

     //  ab = language

     //  cd = region

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

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

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

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

     function LanguageInfo(aName, aABCD, aIsVisible)

     {

       this.name = aName;

       this.abcd = aABCD;

       this.isVisible = aIsVisible;

     }

     // 1) Read the available languages out of language.properties

     var strings = bundleAccepted.strings;

     while (strings.hasMoreElements()) {

       var currString = strings.getNext();

       if (!(currString instanceof Components.interfaces.nsIPropertyElement))

         break;

       var property = currString.key.split("."); // ab[-cd].accept

       if (property[1] == "accept") {

         var abCD = property[0];

         var abCDPairs = abCD.split("-");      // ab[-cd]

         var useABCDFormat = abCDPairs.length > 1;

         var ab = useABCDFormat ? abCDPairs[0] : abCD;

         var cd = useABCDFormat ? abCDPairs[1] : "";

         if (ab) {

           var language = "";

           try {

             language = bundleLanguages.getString(ab);

           } 

           catch (e) { continue; };

           var region = "";

           if (useABCDFormat) {

             try {

               region = bundleRegions.getString(cd);

             }

             catch (e) { continue; }

           }

           var name = "";

           if (useABCDFormat)

             name = bundlePreferences.getFormattedString("languageRegionCodeFormat", 

                                                         [language, region, abCD]);

           else

             name = bundlePreferences.getFormattedString("languageCodeFormat", 

                                                         [language, abCD]);

           if (name && abCD) {

             var isVisible = currString.value == "true" && 

                             (!(abCD in this._acceptLanguages) || !this._acceptLanguages[abCD]);

             var li = new LanguageInfo(name, abCD, isVisible);

             this._availableLanguagesList.push(li);

           }

         }

       }

     }

     this._buildAvailableLanguageList();

   },

   _buildAvailableLanguageList: function ()

   {

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

     while (availableLanguagesPopup.hasChildNodes())

       availableLanguagesPopup.removeChild(availableLanguagesPopup.firstChild);

     // Sort the list of languages by name

     this._availableLanguagesList.sort(function (a, b) {

                                         return a.name.localeCompare(b.name);

                                       });

     // Load the UI with the data

     for (var i = 0; i < this._availableLanguagesList.length; ++i) {

       var abCD = this._availableLanguagesList[i].abcd;

       if (this._availableLanguagesList[i].isVisible && 

           (!(abCD in this._acceptLanguages) || !this._acceptLanguages[abCD])) {

         var menuitem = document.createElement("menuitem");

         menuitem.id = this._availableLanguagesList[i].abcd;

         availableLanguagesPopup.appendChild(menuitem);

         menuitem.setAttribute("label", this._availableLanguagesList[i].name);

       }

     }

   },

   readAcceptLanguages: function ()

   {

     while (this._activeLanguages.hasChildNodes())

       this._activeLanguages.removeChild(this._activeLanguages.firstChild);

     var selectedIndex = 0;

     var preference = document.getElementById("intl.accept_languages");

     if (preference.value == "") 

       return undefined;

     var languages = preference.value.toLowerCase().split(/\s*,\s*/);

     for (var i = 0; i < languages.length; ++i) {

       var name = this._getLanguageName(languages[i]);

       if (!name)

         name = "[" + languages[i] + "]";

       var listitem = document.createElement("listitem");

       listitem.id = languages[i];

       if (languages[i] == this._selectedItemID)

         selectedIndex = i;

       this._activeLanguages.appendChild(listitem);

       listitem.setAttribute("label", name);

       // Hash this language as an "Active" language so we don't

       // show it in the list that can be added. 

       this._acceptLanguages[languages[i]] = true;

     }

     if (this._activeLanguages.childNodes.length > 0) {

       this._activeLanguages.ensureIndexIsVisible(selectedIndex);

       this._activeLanguages.selectedIndex = selectedIndex;

     }

     return undefined;

   },

   writeAcceptLanguages: function ()

   {

     return undefined;

   },

   onAvailableLanguageSelect: function ()

   {

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

     addButton.disabled = false;

     this._availableLanguages.removeAttribute("accesskey");

   },

   addLanguage: function ()

   {

     var selectedID = this._availableLanguages.selectedItem.id;

     var preference = document.getElementById("intl.accept_languages");

     var arrayOfPrefs = preference.value.toLowerCase().split(/\s*,\s*/);

     for (var i = 0; i < arrayOfPrefs.length; ++i ){

       if (arrayOfPrefs[i] == selectedID)

         return;

     }

     this._selectedItemID = selectedID;

     if (preference.value == "") 

       preference.value = selectedID;

     else {

       arrayOfPrefs.unshift(selectedID);

       preference.value = arrayOfPrefs.join(",");

     }

     this._acceptLanguages[selectedID] = true;

     this._availableLanguages.selectedItem = null;

     // Rebuild the available list with the added item removed...

     this._buildAvailableLanguageList(); 

     this._availableLanguages.setAttribute("label", this._availableLanguages.getAttribute("label2"));

   },

   removeLanguage: function ()

   {

     // Build the new preference value string.

     var languagesArray = [];

     for (var i = 0; i < this._activeLanguages.childNodes.length; ++i) {

       var item = this._activeLanguages.childNodes[i];

       if (!item.selected) 

         languagesArray.push(item.id);

       else  

         this._acceptLanguages[item.id] = false;

     }

     var string = languagesArray.join(",");

     // Get the item to select after the remove operation completes.     

     var selection = this._activeLanguages.selectedItems;

     var lastSelected = selection[selection.length-1];

     var selectItem = lastSelected.nextSibling || lastSelected.previousSibling;

     selectItem = selectItem ? selectItem.id : null;

     this._selectedItemID = selectItem;

     // Update the preference and force a UI rebuild

     var preference = document.getElementById("intl.accept_languages");

     preference.value = string;

     this._buildAvailableLanguageList(); 

   },

   _getLanguageName: function (aABCD)

   {

     if (!this._availableLanguagesList.length)

       this._loadAvailableLanguages();

     for (var i = 0; i < this._availableLanguagesList.length; ++i) {

       if (aABCD == this._availableLanguagesList[i].abcd) 

         return this._availableLanguagesList[i].name;

     }

     return "";

   },

   moveUp: function ()

   {

     var selectedItem = this._activeLanguages.selectedItems[0];

     var previousItem = selectedItem.previousSibling;

     var string = "";

     for (var i = 0; i < this._activeLanguages.childNodes.length; ++i) {

       var item = this._activeLanguages.childNodes[i];

       string += (i == 0 ? "" : ",");

       if (item.id == previousItem.id) 

         string += selectedItem.id;

       else if (item.id == selectedItem.id)

         string += previousItem.id;

       else

         string += item.id;

     }

     this._selectedItemID = selectedItem.id;

     // Update the preference and force a UI rebuild

     var preference = document.getElementById("intl.accept_languages");

     preference.value = string;

   },

   moveDown: function ()

   {

     var selectedItem = this._activeLanguages.selectedItems[0];

     var nextItem = selectedItem.nextSibling;

     var string = "";

     for (var i = 0; i < this._activeLanguages.childNodes.length; ++i) {

       var item = this._activeLanguages.childNodes[i];

       string += (i == 0 ? "" : ",");

       if (item.id == nextItem.id) 

         string += selectedItem.id;

       else if (item.id == selectedItem.id)

         string += nextItem.id;

       else

         string += item.id;

     }

     this._selectedItemID = selectedItem.id;

     // Update the preference and force a UI rebuild

     var preference = document.getElementById("intl.accept_languages");

     preference.value = string;

   },

   onLanguageSelect: function ()

   {

     var upButton = document.getElementById("up");

     var downButton = document.getElementById("down");

     var removeButton = document.getElementById("remove");

     switch (this._activeLanguages.selectedCount) {

     case 0:

       upButton.disabled = downButton.disabled = removeButton.disabled = true;

       break;

     case 1:

       upButton.disabled = this._activeLanguages.selectedIndex == 0;

       downButton.disabled = this._activeLanguages.selectedIndex == this._activeLanguages.childNodes.length - 1;

       removeButton.disabled = false;

       break;

     default:

       upButton.disabled = true;

       downButton.disabled = true;

       removeButton.disabled = false;

     }

   }

 };