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/* ***** 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.org code.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 2001
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Darin Fisher <darin@netscape.com> (original author)
 *
 * 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
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 * ***** END LICENSE BLOCK ***** */

#include "nsIProtocolHandler.idl"

interface nsIFile;

[scriptable, uuid(1fb25bd5-4354-4dcd-8d97-621b7b3ed2e4)]
interface nsIFileProtocolHandler : nsIProtocolHandler
{
    /**
     * This method constructs a new file URI 
     *
     * @param aFile nsIFile
     * @return reference to a new nsIURI object
     */
    nsIURI newFileURI(in nsIFile aFile);

    /**
     * Converts the nsIFile to the corresponding URL string.  NOTE: under
     * some platforms this is a lossy conversion (e.g., Mac Carbon build).
     * If the nsIFile is a local file, then the result will be a file://
     * URL string.
     *
     * The resulting string may contain URL-escaped characters.
     * NOTE: Callers should use getURLSpecFromActualFile or
     * getURLSpecFromDirFile if possible, for performance reasons.
     */
    AUTF8String getURLSpecFromFile(in nsIFile file);

    /**
     * Converts the nsIFile to the corresponding URL string. Should
     * only be called on files which are not directories. Otherwise
     * identical to getURLSpecFromFile, but is usually more efficient.
     * WARNING: This restriction may not be enforced at runtime! 
     */
    AUTF8String getURLSpecFromActualFile(in nsIFile file);

    /**
     * Converts the nsIFile to the corresponding URL string. Should
     * only be called on files which are directories. Otherwise
     * identical to getURLSpecFromFile, but is usually more efficient.
     * WARNING: This restriction may not be enforced at runtime! 
     */
    AUTF8String getURLSpecFromDir(in nsIFile file);

    /**
     * Converts the URL string into the corresponding nsIFile if possible.
     * A local file will be created if the URL string begins with file://.
     */
    nsIFile getFileFromURLSpec(in AUTF8String url);

    /**
     * Takes a local file and tries to interpret it as an internet shortcut
     * (e.g. .url files on windows).
     * @param file The local file to read
     * @return The URI the file refers to
     *
     * @throw NS_ERROR_NOT_AVAILABLE if the OS does not support such files.
     * @throw NS_ERROR_NOT_AVAILABLE if this file is not an internet shortcut.
     */
    nsIURI readURLFile(in nsIFile file);
};