/* -*- Mode: C++; 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/. */

Components.utils.import("resource://gre/modules/Services.jsm");
Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");

const DEBUG = false; /* set to false to suppress debug messages */

const SIDEBAR_CONTRACTID        = "@mozilla.org/sidebar;1";
const SIDEBAR_CID               = Components.ID("{22117140-9c6e-11d3-aaf1-00805f8a4905}");
const nsISidebar                = Components.interfaces.nsISidebar;
const nsISidebarExternal        = Components.interfaces.nsISidebarExternal;
const nsIClassInfo              = Components.interfaces.nsIClassInfo;

// File extension for Sherlock search plugin description files
const SHERLOCK_FILE_EXT_REGEXP = /\.src$/i;

function nsSidebar()
{
}

nsSidebar.prototype.classID = SIDEBAR_CID;

nsSidebar.prototype.validateSearchEngine =
function (engineURL, iconURL)
{
  try
  {
    // Make sure the URLs are HTTP, HTTPS, or FTP.
    var isWeb = /^(https?|ftp):\/\//i;

    if (!isWeb.test(engineURL))
      throw "Unsupported search engine URL";

    if (iconURL && !isWeb.test(iconURL))
      throw "Unsupported search icon URL.";
  }
  catch(ex)
  {
    debug(ex);
    Components.utils.reportError("Invalid argument passed to window.sidebar.addSearchEngine: " + ex);

    var searchBundle = Services.strings.createBundle("chrome://global/locale/search/search.properties");
    var brandBundle = Services.strings.createBundle("chrome://branding/locale/brand.properties");
    var brandName = brandBundle.GetStringFromName("brandShortName");
    var title = searchBundle.GetStringFromName("error_invalid_engine_title");
    var msg = searchBundle.formatStringFromName("error_invalid_engine_msg",
                                                [brandName], 1);
    Services.ww.getNewPrompter(null).alert(title, msg);
    return false;
  }

  return true;
}

// The suggestedTitle and suggestedCategory parameters are ignored, but remain
// for backward compatibility.
nsSidebar.prototype.addSearchEngine =
function (engineURL, iconURL, suggestedTitle, suggestedCategory)
{
  debug("addSearchEngine(" + engineURL + ", " + iconURL + ", " +
        suggestedCategory + ", " + suggestedTitle + ")");

  if (!this.validateSearchEngine(engineURL, iconURL))
    return;

  // OpenSearch files will likely be far more common than Sherlock files, and
  // have less consistent suffixes, so we assume that ".src" is a Sherlock
  // (text) file, and anything else is OpenSearch (XML).
  var dataType;
  if (SHERLOCK_FILE_EXT_REGEXP.test(engineURL))
    dataType = Components.interfaces.nsISearchEngine.DATA_TEXT;
  else
    dataType = Components.interfaces.nsISearchEngine.DATA_XML;

  Services.search.addEngine(engineURL, dataType, iconURL, true);
}

// This function exists largely to implement window.external.AddSearchProvider(),
// to match other browsers' APIs.  The capitalization, although nonstandard here,
// is therefore important.
nsSidebar.prototype.AddSearchProvider =
function (aDescriptionURL)
{
  // Get the favicon URL for the current page, or our best guess at the current
  // page since we don't have easy access to the active document.  Most search
  // engines will override this with an icon specified in the OpenSearch
  // description anyway.
  var win = Services.wm.getMostRecentWindow("navigator:browser");
  var browser = win.gBrowser;
  var iconURL = "";
  // Use documentURIObject in the check for shouldLoadFavIcon so that we
  // do the right thing with about:-style error pages.  Bug 453442
  if (browser.shouldLoadFavIcon(browser.selectedBrowser
                                       .contentDocument
                                       .documentURIObject))
    iconURL = browser.getIcon();

  if (!this.validateSearchEngine(aDescriptionURL, iconURL))
    return;

  const typeXML = Components.interfaces.nsISearchEngine.DATA_XML;
  Services.search.addEngine(aDescriptionURL, typeXML, iconURL, true);
}

// This function exists to implement window.external.IsSearchProviderInstalled(),
// for compatibility with other browsers.  It will return an integer value
// indicating whether the given engine is installed for the current user.
// However, it is currently stubbed out due to security/privacy concerns
// stemming from difficulties in determining what domain issued the request.
// See bug 340604 and
// http://msdn.microsoft.com/en-us/library/aa342526%28VS.85%29.aspx .
// XXX Implement this!
nsSidebar.prototype.IsSearchProviderInstalled =
function (aSearchURL)
{
  return 0;
}

nsSidebar.prototype.classInfo = XPCOMUtils.generateCI({classID: SIDEBAR_CID,
                                                       contractID: SIDEBAR_CONTRACTID,
                                                       classDescription: "Sidebar",
                                                       interfaces: [nsISidebar, nsISidebarExternal],
                                                       flags: nsIClassInfo.DOM_OBJECT});

nsSidebar.prototype.QueryInterface = XPCOMUtils.generateQI([nsISidebar, nsISidebarExternal]);

this.NSGetFactory = XPCOMUtils.generateNSGetFactory([nsSidebar]);

/* static functions */
if (DEBUG)
    debug = function (s) { dump("-*- sidebar component: " + s + "\n"); }
else
    debug = function (s) {}