/* -*- Mode: javascript; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 * ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Mozilla Calendar code.
 *
 * The Initial Developer of the Original Code is Eric Belhaire.
 * Portions created by the Initial Developer are Copyright (C) 2003
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s): 
 *   Matthew Willis <mattwillis@gmail.com>
 *   Philipp Kewisch <mozilla@kewis.ch>
 *   Simon Paquet <bugzilla@babylonsounds.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

function openAboutDialog()
{
  const SUNBIRD_ID = "{718e30fb-e89b-41dd-9da7-e25a45638b28}";
  var appInfo = Components.classes["@mozilla.org/xre/app-info;1"]
                          .getService(Components.interfaces.nsIXULAppInfo);
  var url = (appInfo.ID == SUNBIRD_ID) ?
    "chrome://sunbird/content/aboutDialog.xul" :
    "chrome://messenger/content/aboutDialog.xul" ;
  var name = "About";
#ifdef XP_MACOSX
  // Define minimizable=no although it does nothing on OS X (bug 287162).
  // Remove this comment once bug 287162 is fixed
  window.open(url, name, "centerscreen,chrome,resizable=no,minimizable=no");
#else
  window.openDialog(url, name, "modal,centerscreen,chrome,resizable=no");
#endif
}

/**
 * Opens the release notes page for this version of the application.
 */
function openReleaseNotes()
{
  const SUNBIRD_ID = "{718e30fb-e89b-41dd-9da7-e25a45638b28}";
  var appInfo = Components.classes["@mozilla.org/xre/app-info;1"]
                          .getService(Components.interfaces.nsIXULAppInfo);
  if (appInfo.ID == SUNBIRD_ID) {
    var appInfo = Components.classes["@mozilla.org/xre/app-info;1"]
                            .getService(Components.interfaces.nsIXULAppInfo);
    var sbs = Components.classes["@mozilla.org/intl/stringbundle;1"]
                        .getService(Components.interfaces.nsIStringBundleService);
    var bundle = sbs.createBundle("chrome://branding/locale/brand.properties");
    var relNotesURL = bundle.formatStringFromName("releaseNotesURL",[appInfo.version],1)
    launchBrowser(relNotesURL);
  } else {
    openFormattedRegionURL('app.releaseNotesURL');
  }
}

/**
 * Opens region specific web pages for the application like the release notes, the help site, etc. 
 *   aResourceName --> the string resource ID in region.properties to load. 
 */
function openRegionURL(aResourceName)
{
  var appInfo = Components.classes["@mozilla.org/xre/app-info;1"]
                          .getService(Components.interfaces.nsIXULAppInfo);
  try {
    var strBundleService = Components.classes["@mozilla.org/intl/stringbundle;1"].getService(Components.interfaces.nsIStringBundleService);
    var regionBundle = strBundleService.createBundle("chrome://messenger-region/locale/region.properties");
    // the release notes are special and need to be formatted with the app version
    var urlToOpen;
    if (aResourceName == "releaseNotesURL")
      urlToOpen = regionBundle.formatStringFromName(aResourceName, [appInfo.version], 1);
    else
      urlToOpen = regionBundle.GetStringFromName(aResourceName);
      
    var protocolSvc = Components.classes["@mozilla.org/uriloader/external-protocol-service;1"]
                      .getService(Components.interfaces.nsIExternalProtocolService);
    protocolSvc.loadUrl(cal.getIOService().newURI(urlToOpen, null, null));
  } catch (ex) {}
}

/**
 *  Fetches the url for the passed in pref name, formats it and then loads it in the default
 *  browser.
 *
 *  @param aPrefName - name of the pref that holds the url we want to format and open
 */
function openFormattedRegionURL(aPrefName)
{
  var formattedUrl = getFormattedRegionURL(aPrefName);
  
  var protocolSvc = Components.classes["@mozilla.org/uriloader/external-protocol-service;1"].
                               getService(Components.interfaces.nsIExternalProtocolService);
  protocolSvc.loadUrl(cal.getIOService().newURI(formattedUrl, null, null));
}

/**
 *  Fetches the url for the passed in pref name and uses the URL formatter service to 
 *    process it.
 *
 *  @param aPrefName - name of the pref that holds the url we want to format and open
 *  @returns the formatted url string
 */
function getFormattedRegionURL(aPrefName)
{
  var formatter = Components.classes["@mozilla.org/toolkit/URLFormatterService;1"].
                             getService(Components.interfaces.nsIURLFormatter);
  return formatter.formatURLPref(aPrefName);
}

function launchBrowser(UrlToGoTo)
{
  if (!UrlToGoTo) {
    return;
  }

  // 0. Prevent people from trying to launch URLs such as javascript:foo();
  //    by only allowing URLs starting with http or https.
  // XXX: We likely will want to do this using nsIURLs in the future to
  //      prevent sneaky nasty escaping issues, but this is fine for now.
  if (UrlToGoTo.indexOf("http") != 0) {
    Components.utils.reportError ("launchBrowser: " +
                                  "Invalid URL provided: " + UrlToGoTo +
                                  " Only http:// and https:// URLs are valid.");
    return;
  }

  var externalLoader =
    (Components
     .classes["@mozilla.org/uriloader/external-protocol-service;1"]
     .getService(Components.interfaces.nsIExternalProtocolService));
  externalLoader.loadUrl(cal.getIOService().newURI(UrlToGoTo, null, null));
}
