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//@line 39 "e:\fx19rel\WINNT_5.2_Depend\mozilla\browser\components\feeds\src\FeedConverter.js"

const Cc = Components.classes;
const Ci = Components.interfaces;
const Cr = Components.results;

function LOG(str) {
  dump("*** " + str + "\n");
}

const FC_CLASSID = Components.ID("{229fa115-9412-4d32-baf3-2fc407f76fb1}");
const FC_CLASSNAME = "Feed Stream Converter";
const FS_CLASSID = Components.ID("{2376201c-bbc6-472f-9b62-7548040a61c6}");
const FS_CLASSNAME = "Feed Result Service";
const FS_CONTRACTID = "@mozilla.org/browser/feeds/result-service;1";
const FPH_CONTRACTID = "@mozilla.org/network/protocol;1?name=feed";
const FPH_CLASSID = Components.ID("{4f91ef2e-57ba-472e-ab7a-b4999e42d6c0}");
const FPH_CLASSNAME = "Feed Protocol Handler";
const PCPH_CONTRACTID = "@mozilla.org/network/protocol;1?name=pcast";
const PCPH_CLASSID = Components.ID("{1c31ed79-accd-4b94-b517-06e0c81999d5}");
const PCPH_CLASSNAME = "Podcast Protocol Handler";

const TYPE_MAYBE_FEED = "application/vnd.mozilla.maybe.feed";
const TYPE_MAYBE_VIDEO_FEED = "application/vnd.mozilla.maybe.video.feed";
const TYPE_MAYBE_AUDIO_FEED = "application/vnd.mozilla.maybe.audio.feed";
const TYPE_ANY = "*/*";

const FEEDHANDLER_URI = "about:feeds";

const PREF_SELECTED_APP = "browser.feeds.handlers.application";
const PREF_SELECTED_WEB = "browser.feeds.handlers.webservice";
const PREF_SELECTED_ACTION = "browser.feeds.handler";
const PREF_SELECTED_READER = "browser.feeds.handler.default";

const PREF_VIDEO_SELECTED_APP = "browser.videoFeeds.handlers.application";
const PREF_VIDEO_SELECTED_WEB = "browser.videoFeeds.handlers.webservice";
const PREF_VIDEO_SELECTED_ACTION = "browser.videoFeeds.handler";
const PREF_VIDEO_SELECTED_READER = "browser.videoFeeds.handler.default";

const PREF_AUDIO_SELECTED_APP = "browser.audioFeeds.handlers.application";
const PREF_AUDIO_SELECTED_WEB = "browser.audioFeeds.handlers.webservice";
const PREF_AUDIO_SELECTED_ACTION = "browser.audioFeeds.handler";
const PREF_AUDIO_SELECTED_READER = "browser.audioFeeds.handler.default";

function getPrefAppForType(t) {
  switch (t) {
    case Ci.nsIFeed.TYPE_VIDEO:
      return PREF_VIDEO_SELECTED_APP;

    case Ci.nsIFeed.TYPE_AUDIO:
      return PREF_AUDIO_SELECTED_APP;

    default:
      return PREF_SELECTED_APP;
  }
}

function getPrefWebForType(t) {
  switch (t) {
    case Ci.nsIFeed.TYPE_VIDEO:
      return PREF_VIDEO_SELECTED_WEB;

    case Ci.nsIFeed.TYPE_AUDIO:
      return PREF_AUDIO_SELECTED_WEB;

    default:
      return PREF_SELECTED_WEB;
  }
}

function getPrefActionForType(t) {
  switch (t) {
    case Ci.nsIFeed.TYPE_VIDEO:
      return PREF_VIDEO_SELECTED_ACTION;

    case Ci.nsIFeed.TYPE_AUDIO:
      return PREF_AUDIO_SELECTED_ACTION;

    default:
      return PREF_SELECTED_ACTION;
  }
}

function getPrefReaderForType(t) {
  switch (t) {
    case Ci.nsIFeed.TYPE_VIDEO:
      return PREF_VIDEO_SELECTED_READER;

    case Ci.nsIFeed.TYPE_AUDIO:
      return PREF_AUDIO_SELECTED_READER;

    default:
      return PREF_SELECTED_READER;
  }
}

function safeGetCharPref(pref, defaultValue) {
  var prefs =   
      Cc["@mozilla.org/preferences-service;1"].
      getService(Ci.nsIPrefBranch);
  try {
    return prefs.getCharPref(pref);
  }
  catch (e) {
  }
  return defaultValue;
}

function FeedConverter() {
}
FeedConverter.prototype = {
  /**
   * This is the downloaded text data for the feed.
   */
  _data: null,
  
  /**
   * This is the object listening to the conversion, which is ultimately the
   * docshell for the load.
   */
  _listener: null,

  /**
   * Records if the feed was sniffed
   */
  _sniffed: false,
  
  /**
   * See nsIStreamConverter.idl
   */
  canConvert: function FC_canConvert(sourceType, destinationType) {
    // We only support one conversion.
    return destinationType == TYPE_ANY && ((sourceType == TYPE_MAYBE_FEED) ||
                                           (sourceType == TYPE_MAYBE_VIDEO) ||
                                           (sourceType == TYPE_MAYBE_AUDIO));
  },
  
  /**
   * See nsIStreamConverter.idl
   */
  convert: function FC_convert(sourceStream, sourceType, destinationType, 
                               context) {
    throw Cr.NS_ERROR_NOT_IMPLEMENTED;
  },
  
  /**
   * See nsIStreamConverter.idl
   */
  asyncConvertData: function FC_asyncConvertData(sourceType, destinationType,
                                                 listener, context) {
    this._listener = listener;
  },
  
  /**
   * Whether or not the preview page is being forced.
   */
  _forcePreviewPage: false,
  
  /** 
   * Release our references to various things once we're done using them.
   */
  _releaseHandles: function FC__releaseHandles() {
    this._listener = null;
    this._request = null;
    this._processor = null;
  },
  
  /**
   * See nsIFeedResultListener.idl
   */
  handleResult: function FC_handleResult(result) {
    // Feeds come in various content types, which our feed sniffer coerces to
    // the maybe.feed type. However, feeds are used as a transport for 
    // different data types, e.g. news/blogs (traditional feed), video/audio
    // (podcasts) and photos (photocasts, photostreams). Each of these is 
    // different in that there's a different class of application suitable for
    // handling feeds of that type, but without a content-type differentiation
    // it is difficult for us to disambiguate.
    // 
    // The other problem is that if the user specifies an auto-action handler
    // for one feed application, the fact that the content type is shared means 
    // that all other applications will auto-load with that handler too, 
    // regardless of the content-type. 
    //
    // This means that content-type alone is not enough to determine whether
    // or not a feed should be auto-handled. This means that for feeds we need
    // to always use this stream converter, even when an auto-action is 
    // specified, not the basic one provided by WebContentConverter. This 
    // converter needs to consume all of the data and parse it, and based on
    // that determination make a judgement about type. 
    //
    // Since there are no content types for this content, and I'm not going to
    // invent any, the upshot is that while a user can set an auto-handler for
    // generic feed content, the system will prevent them from setting an auto-
    // handler for other stream types. In those cases, the user will always see
    // the preview page and have to select a handler. We can guess and show 
    // a client handler, but will not be able to show web handlers for those
    // types.
    //
    // If this is just a feed, not some kind of specialized application, then
    // auto-handlers can be set and we should obey them. 
    try {
      var feedService = 
          Cc["@mozilla.org/browser/feeds/result-service;1"].
          getService(Ci.nsIFeedResultService);
      if (!this._forcePreviewPage && result.doc) {
        var feed = result.doc.QueryInterface(Ci.nsIFeed);
        var handler = safeGetCharPref(getPrefActionForType(feed.type), "ask");

        if (handler != "ask") {
          if (handler == "reader")
            handler = safeGetCharPref(getPrefReaderForType(feed.type), "bookmarks");
          switch (handler) {
            case "web":
              var wccr = 
                  Cc["@mozilla.org/embeddor.implemented/web-content-handler-registrar;1"].
                  getService(Ci.nsIWebContentConverterService);
              if ((feed.type == Ci.nsIFeed.TYPE_FEED &&
                   wccr.getAutoHandler(TYPE_MAYBE_FEED)) ||
                  (feed.type == Ci.nsIFeed.TYPE_VIDEO &&
                   wccr.getAutoHandler(TYPE_MAYBE_VIDEO_FEED)) ||
                  (feed.type == Ci.nsIFeed.TYPE_AUDIO &&
                   wccr.getAutoHandler(TYPE_MAYBE_AUDIO_FEED))) {
                wccr.loadPreferredHandler(this._request);
                return;
              }
              break;

            default:
              LOG("unexpected handler: " + handler);
              // fall through -- let feed service handle error
            case "bookmarks":
            case "client":
              try {
                var title = feed.title ? feed.title.plainText() : "";
                var desc = feed.subtitle ? feed.subtitle.plainText() : "";
                feedService.addToClientReader(result.uri.spec, title, desc, feed.type);
                return;
              } catch(ex) { /* fallback to preview mode */ }
          }
        }
      }
          
      var ios = 
          Cc["@mozilla.org/network/io-service;1"].
          getService(Ci.nsIIOService);
      var chromeChannel;

      // show the feed page if it wasn't sniffed and we have a document,
      // or we have a document, title, and link or id
      if (result.doc && (!this._sniffed ||
          (result.doc.title && (result.doc.link || result.doc.id)))) {

        // If there was no automatic handler, or this was a podcast,
        // photostream or some other kind of application, we must always
        // show the preview page.
        
        // Store the result in the result service so that the display
        // page can access it.

        feedService.addFeedResult(result);

        // Now load the actual XUL document.
        var chromeURI = ios.newURI(FEEDHANDLER_URI, null, null);
        chromeChannel = ios.newChannelFromURI(chromeURI, null);
        chromeChannel.originalURI = result.uri;
      }
      else
        chromeChannel = ios.newChannelFromURI(result.uri, null);

      chromeChannel.loadGroup = this._request.loadGroup;
      chromeChannel.asyncOpen(this._listener, null);
    }
    finally {
      this._releaseHandles();
    }
  },
  
  /**
   * See nsIStreamListener.idl
   */
  onDataAvailable: function FC_onDataAvailable(request, context, inputStream, 
                                               sourceOffset, count) {
    if (this._processor)
      this._processor.onDataAvailable(request, context, inputStream,
                                      sourceOffset, count);
  },
  
  /**
   * See nsIRequestObserver.idl
   */
  onStartRequest: function FC_onStartRequest(request, context) {
    var channel = request.QueryInterface(Ci.nsIChannel);

    // Check for a header that tells us there was no sniffing
    // The value doesn't matter.
    try {
      var httpChannel = channel.QueryInterface(Ci.nsIHttpChannel);
      var noSniff = httpChannel.getResponseHeader("X-Moz-Is-Feed");
    }
    catch (ex) {
      this._sniffed = true;
    }

    this._request = request;
    
    // Save and reset the forced state bit early, in case there's some kind of
    // error.
    var feedService = 
        Cc["@mozilla.org/browser/feeds/result-service;1"].
        getService(Ci.nsIFeedResultService);
    this._forcePreviewPage = feedService.forcePreviewPage;
    feedService.forcePreviewPage = false;

    // Parse feed data as it comes in
    this._processor =
        Cc["@mozilla.org/feed-processor;1"].
        createInstance(Ci.nsIFeedProcessor);
    this._processor.listener = this;
    this._processor.parseAsync(null, channel.URI);
    
    this._processor.onStartRequest(request, context);
  },
  
  /**
   * See nsIRequestObserver.idl
   */
  onStopRequest: function FC_onStopReqeust(request, context, status) {
    if (this._processor)
      this._processor.onStopRequest(request, context, status);
  },
  
  /**
   * See nsISupports.idl
   */
  QueryInterface: function FC_QueryInterface(iid) {
    if (iid.equals(Ci.nsIFeedResultListener) ||
        iid.equals(Ci.nsIStreamConverter) ||
        iid.equals(Ci.nsIStreamListener) ||
        iid.equals(Ci.nsIRequestObserver)||
        iid.equals(Ci.nsISupports))
      return this;
    throw Cr.NS_ERROR_NO_INTERFACE;
  },
};

var FeedConverterFactory = {
  createInstance: function FS_createInstance(outer, iid) {
    if (outer != null)
      throw Cr.NS_ERROR_NO_AGGREGATION;
    return new FeedConverter().QueryInterface(iid);
  },

  QueryInterface: function FS_QueryInterface(iid) {
    if (iid.equals(Ci.nsIFactory) ||
        iid.equals(Ci.nsISupports))
      return this;
    throw Cr.NS_ERROR_NOT_IMPLEMENTED;
  },
};

/**
 * Keeps parsed FeedResults around for use elsewhere in the UI after the stream
 * converter completes. 
 */
var FeedResultService = {
  
  /**
   * A URI spec -> [nsIFeedResult] hash. We have to keep a list as the
   * value in case the same URI is requested concurrently.
   */
  _results: { },
  
  /**
   * See nsIFeedResultService.idl
   */
  forcePreviewPage: false,
  
  /**
   * See nsIFeedResultService.idl
   */
  addToClientReader: function FRS_addToClientReader(spec, title, subtitle, feedType) {
    var prefs =   
        Cc["@mozilla.org/preferences-service;1"].
        getService(Ci.nsIPrefBranch);

    var handler = safeGetCharPref(getPrefActionForType(feedType), "bookmarks");
    if (handler == "ask" || handler == "reader")
      handler = safeGetCharPref(getPrefReaderForType(feedType), "bookmarks");

    switch (handler) {
    case "client":
      var clientApp = prefs.getComplexValue(getPrefAppForType(feedType), Ci.nsILocalFile);

      // For the benefit of applications that might know how to deal with more
      // URLs than just feeds, send feed: URLs in the following format:
      //
      // http urls: replace scheme with feed, e.g.
      // http://foo.com/index.rdf -> feed://foo.com/index.rdf
      // other urls: prepend feed: scheme, e.g.
      // https://foo.com/index.rdf -> feed:https://foo.com/index.rdf
      var ios = 
          Cc["@mozilla.org/network/io-service;1"].
          getService(Ci.nsIIOService);
      var feedURI = ios.newURI(spec, null, null);
      if (feedURI.schemeIs("http")) {
        feedURI.scheme = "feed";
        spec = feedURI.spec;
      }
      else
        spec = "feed:" + spec;

      var ss = 
          Cc["@mozilla.org/browser/shell-service;1"].
          getService(Ci.nsIShellService);
      ss.openApplicationWithURI(clientApp, spec);
      break;

    default:
      // "web" should have been handled elsewhere
      LOG("unexpected handler: " + handler);
      // fall through
    case "bookmarks":
      var wm = 
          Cc["@mozilla.org/appshell/window-mediator;1"].
          getService(Ci.nsIWindowMediator);
      var topWindow = wm.getMostRecentWindow("navigator:browser");
      topWindow.PlacesCommandHook.addLiveBookmark(spec, title, subtitle);
      break;
    }
  },
  
  /**
   * See nsIFeedResultService.idl
   */
  addFeedResult: function FRS_addFeedResult(feedResult) {
    NS_ASSERT(feedResult.uri != null, "null URI!");
    NS_ASSERT(feedResult.uri != null, "null feedResult!");
    var spec = feedResult.uri.spec;
    if(!this._results[spec])  
      this._results[spec] = [];
    this._results[spec].push(feedResult);
  },
  
  /**
   * See nsIFeedResultService.idl
   */
  getFeedResult: function RFS_getFeedResult(uri) {
    NS_ASSERT(uri != null, "null URI!");
    var resultList = this._results[uri.spec];
    for (var i in resultList) {
      if (resultList[i].uri == uri)
        return resultList[i];
    }
    return null;
  },
  
  /**
   * See nsIFeedResultService.idl
   */
  removeFeedResult: function FRS_removeFeedResult(uri) {
    NS_ASSERT(uri != null, "null URI!");
    var resultList = this._results[uri.spec];
    if (!resultList)
      return;
    var deletions = 0;
    for (var i = 0; i < resultList.length; ++i) {
      if (resultList[i].uri == uri) {
        delete resultList[i];
        ++deletions;
      }
    }
    
    // send the holes to the end
    resultList.sort();
    // and trim the list
    resultList.splice(resultList.length - deletions, deletions);
    if (resultList.length == 0)
      delete this._results[uri.spec];
  },

  createInstance: function FRS_createInstance(outer, iid) {
    if (outer != null)
      throw Cr.NS_ERROR_NO_AGGREGATION;
    return this.QueryInterface(iid);
  },
  
  QueryInterface: function FRS_QueryInterface(iid) {
    if (iid.equals(Ci.nsIFeedResultService) ||
        iid.equals(Ci.nsIFactory) ||
        iid.equals(Ci.nsISupports))
      return this;
    throw Cr.NS_ERROR_NOT_IMPLEMENTED;
  },
};

/**
 * A protocol handler that attempts to deal with the variant forms of feed:
 * URIs that are actually either http or https.
 */
function FeedProtocolHandler(scheme) {
  this._scheme = scheme;
  var ios = 
      Cc["@mozilla.org/network/io-service;1"].
      getService(Ci.nsIIOService);
  this._http = ios.getProtocolHandler("http");
}
FeedProtocolHandler.prototype = {
  _scheme: "",
  get scheme() {
    return this._scheme;
  },
  
  get protocolFlags() {
    return this._http.protocolFlags;
  },
  
  get defaultPort() {
    return this._http.defaultPort;
  },
  
  allowPort: function FPH_allowPort(port, scheme) {
    return this._http.allowPort(port, scheme);
  },
  
  newURI: function FPH_newURI(spec, originalCharset, baseURI) {
    // See bug 408599 - feed URIs can be either standard URLs of the form
    // feed://example.com, in which case the real protocol is http, or nested
    // URIs of the form feed:realscheme:. When realscheme is either http or
    // https, we deal with the way that creates a standard URL with the
    // realscheme as the host by unmangling in newChannel; for others, we fail
    // rather than let it wind up loading something like www.realscheme.com//foo

    const feedSlashes = "feed://";
    const feedHttpSlashes = "feed:http://";
    const feedHttpsSlashes = "feed:https://";
    const NS_ERROR_MALFORMED_URI = 0x804B000A;

    if (spec.substr(0, feedSlashes.length) != feedSlashes &&
        spec.substr(0, feedHttpSlashes.length) != feedHttpSlashes &&
        spec.substr(0, feedHttpsSlashes.length) != feedHttpsSlashes)
      throw NS_ERROR_MALFORMED_URI;

    var uri = 
        Cc["@mozilla.org/network/standard-url;1"].
        createInstance(Ci.nsIStandardURL);
    uri.init(Ci.nsIStandardURL.URLTYPE_STANDARD, 80, spec, originalCharset,
             baseURI);
    return uri;
  },
  
  newChannel: function FPH_newChannel(aUri) {
    var ios = 
        Cc["@mozilla.org/network/io-service;1"].
        getService(Ci.nsIIOService);
    // feed: URIs either start feed://, in which case the real scheme is http:
    // or feed:http(s)://, (which by now we've changed to feed://realscheme//)
    var feedSpec = aUri.spec;
    const httpsChunk = "feed://https//";
    const httpChunk = "feed://http//";
    if (feedSpec.substr(0, httpsChunk.length) == httpsChunk)
      feedSpec = "https://" + feedSpec.substr(httpsChunk.length);
    else if (feedSpec.substr(0, httpChunk.length) == httpChunk)
      feedSpec = "http://" + feedSpec.substr(httpChunk.length);
    else
      feedSpec = feedSpec.replace(/^feed/, "http");

    var uri = ios.newURI(feedSpec, aUri.originCharset, null);
    var channel =
      ios.newChannelFromURI(uri, null).QueryInterface(Ci.nsIHttpChannel);
    // Set this so we know this is supposed to be a feed
    channel.setRequestHeader("X-Moz-Is-Feed", "1", false);
    channel.originalURI = aUri;
    return channel;
  },
  
  QueryInterface: function FPH_QueryInterface(iid) {
    if (iid.equals(Ci.nsIProtocolHandler) ||
        iid.equals(Ci.nsISupports))
      return this;
    throw Cr.NS_ERROR_NO_INTERFACE;
  }  
};

var Module = {
  QueryInterface: function M_QueryInterface(iid) {
    if (iid.equals(Ci.nsIModule) ||
        iid.equals(Ci.nsISupports))
      return this;
    throw Cr.NS_ERROR_NO_INTERFACE;
  },
  
  getClassObject: function M_getClassObject(cm, cid, iid) {
    if (!iid.equals(Ci.nsIFactory))
      throw Cr.NS_ERROR_NOT_IMPLEMENTED;
    
    if (cid.equals(FS_CLASSID))
      return FeedResultService;
    if (cid.equals(FPH_CLASSID))
      return new GenericComponentFactory(FeedProtocolHandler, "feed");
    if (cid.equals(PCPH_CLASSID))
      return new GenericComponentFactory(FeedProtocolHandler, "pcast");
    if (cid.equals(FC_CLASSID))
      return new GenericComponentFactory(FeedConverter);
      
    throw Cr.NS_ERROR_NO_INTERFACE;
  },
  
  registerSelf: function M_registerSelf(cm, file, location, type) {
    var cr = cm.QueryInterface(Ci.nsIComponentRegistrar);
    
    cr.registerFactoryLocation(FS_CLASSID, FS_CLASSNAME, FS_CONTRACTID,
                               file, location, type);
    cr.registerFactoryLocation(FPH_CLASSID, FPH_CLASSNAME, FPH_CONTRACTID,
                               file, location, type);
    cr.registerFactoryLocation(PCPH_CLASSID, PCPH_CLASSNAME, PCPH_CONTRACTID,
                               file, location, type);

    // The feed converter is always attached, since parsing must be done to 
    // determine whether or not auto-handling can occur. 
    const converterPrefix = "@mozilla.org/streamconv;1?from=";
    var converterContractID = 
        converterPrefix + TYPE_MAYBE_FEED + "&to=" + TYPE_ANY;
    cr.registerFactoryLocation(FC_CLASSID, FC_CLASSNAME, converterContractID,
                               file, location, type);

    converterContractID = 
        converterPrefix + TYPE_MAYBE_VIDEO_FEED + "&to=" + TYPE_ANY;
    cr.registerFactoryLocation(FC_CLASSID, FC_CLASSNAME, converterContractID,
                               file, location, type);

    converterContractID = 
        converterPrefix + TYPE_MAYBE_AUDIO_FEED + "&to=" + TYPE_ANY;
    cr.registerFactoryLocation(FC_CLASSID, FC_CLASSNAME, converterContractID,
                               file, location, type);
    },
  
  unregisterSelf: function M_unregisterSelf(cm, location, type) {
    var cr = cm.QueryInterface(Ci.nsIComponentRegistrar);
    cr.unregisterFactoryLocation(FPH_CLASSID, location);
    cr.unregisterFactoryLocation(PCPH_CLASSID, location);
  },
  
  canUnload: function M_canUnload(cm) {
    return true;
  }
};

function NSGetModule(cm, file) {
  return Module;
}

//@line 44 "e:\fx19rel\WINNT_5.2_Depend\mozilla\toolkit\content\debug.js"

var EXPORTED_SYMBOLS = ["NS_ASSERT"];

var gTraceOnAssert = true;

/**
 * This function provides a simple assertion function for JavaScript.
 * If the condition is true, this function will do nothing.  If the
 * condition is false, then the message will be printed to the console
 * and an alert will appear showing a stack trace, so that the (alpha
 * or nightly) user can file a bug containing it.  For future enhancements, 
 * see bugs 330077 and 330078.
 *
 * To suppress the dialogs, you can run with the environment variable
 * XUL_ASSERT_PROMPT set to 0 (if unset, this defaults to 1).
 *
 * @param condition represents the condition that we're asserting to be
 *                  true when we call this function--should be
 *                  something that can be evaluated as a boolean.
 * @param message   a string to be displayed upon failure of the assertion
 */

function NS_ASSERT(condition, message) {
  if (condition)
    return;

  var releaseBuild = true;
  var defB = Components.classes["@mozilla.org/preferences-service;1"]
                       .getService(Components.interfaces.nsIPrefService)
                       .getDefaultBranch(null);
  try {
    switch (defB.getCharPref("app.update.channel")) {
      case "nightly":
      case "beta":
      case "default":
        releaseBuild = false;
    }
  } catch(ex) {}

  var caller = arguments.callee.caller;
  var assertionText = "ASSERT: " + message + "\n";

  if (releaseBuild) {
    // Just report the error to the console
    Components.utils.reportError(assertionText);
    return;
  }

  // Otherwise, dump to stdout and launch an assertion failure dialog
  dump(assertionText);

  var stackText = "";
  if (gTraceOnAssert) {
    stackText = "Stack Trace: \n";
    var count = 0;
    while (caller) {
      stackText += count++ + ":" + caller.name + "(";
      for (var i = 0; i < caller.arguments.length; ++i) {
        var arg = caller.arguments[i];
        stackText += arg;
        if (i < caller.arguments.length - 1)
          stackText += ",";
      }
      stackText += ")\n";
      caller = caller.arguments.callee.caller;
    }
  }

  var environment = Components.classes["@mozilla.org/process/environment;1"].
                    getService(Components.interfaces.nsIEnvironment);
  if (environment.exists("XUL_ASSERT_PROMPT") &&
      !parseInt(environment.get("XUL_ASSERT_PROMPT")))
    return;

  var source = null;
  if (this.window)
    source = this.window;
  var ps = Components.classes["@mozilla.org/embedcomp/prompt-service;1"].
           getService(Components.interfaces.nsIPromptService);
  ps.alert(source, "Assertion Failed", assertionText + stackText);
}
//@line 37 "e:\fx19rel\WINNT_5.2_Depend\mozilla\browser\components\feeds\src\GenericFactory.js"

/**
 * An object implementing nsIFactory that can construct other objects upon
 * createInstance, passing a set of parameters to that object's constructor.
 */
function GenericComponentFactory(ctor, params) {
  this._ctor = ctor;
  this._params = params;
}
GenericComponentFactory.prototype = {
  _ctor: null,
  _params: null,
  
  createInstance: function GCF_createInstance(outer, iid) {
    if (outer != null)
      throw Cr.NS_ERROR_NO_AGGREGATION;
    return (new this._ctor(this._params)).QueryInterface(iid);
  },
  
  QueryInterface: function GCF_QueryInterface(iid) {
    if (iid.equals(Ci.nsIFactory) ||
        iid.equals(Ci.nsISupports)) 
      return this;
    throw Cr.NS_ERROR_NO_INTERFACE;
  }
};


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