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/* -*- Mode: IDL; 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/. */

#include "nsISupports.idl"

interface nsIChannel;
interface nsIContentViewer;
interface nsIStreamListener;
interface nsIDocShell;
interface nsIDocument;
interface nsILoadGroup;
interface nsIPrincipal;

/**
 * To get a component that implements nsIDocumentLoaderFactory
 * for a given mimetype, use nsICategoryManager to find an entry
 * with the mimetype as its name in the category "Gecko-Content-Viewers".
 * The value of the entry is the contractid of the component.
 * The component is a service, so use GetService, not CreateInstance to get it.
 */

[scriptable, uuid(70905274-8494-4e39-b011-d559adde3733)]
interface nsIDocumentLoaderFactory : nsISupports {
    nsIContentViewer createInstance(in string aCommand,
                              in nsIChannel aChannel,
                              in nsILoadGroup aLoadGroup,
                              in string aContentType, 
                              in nsIDocShell aContainer,
                              in nsISupports aExtraInfo,
                              out nsIStreamListener aDocListenerResult);

    nsIContentViewer createInstanceForDocument(in nsISupports aContainer,
                                         in nsIDocument aDocument,
                                         in string aCommand);

    /**
     * Create a blank document using the given loadgroup and given
     * principal.  aPrincipal is allowed to be null, in which case the
     * new document will get the about:blank codebase principal.
     */
    nsIDocument createBlankDocument(in nsILoadGroup aLoadGroup,
                                    in nsIPrincipal aPrincipal);
};