/* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 *
 * The contents of this file are subject to the Netscape 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/NPL/
 *
 * 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 Communicator client code, 
 * released March 31, 1998. 
 *
 * The Initial Developer of the Original Code is Netscape Communications 
 * Corporation.  Portions created by Netscape are
 * Copyright (C) 1998 Netscape Communications Corporation. All
 * Rights Reserved.
 *
 * Contributor(s): 
 *     Daniel Veditz <dveditz@netscape.com>
 *     Don Bragg <dbragg@netscape.com>
 *     Samir Gehani <sgehani@netscape.com>
 *     Mitch Stoltz <mstoltz@netscape.com>
 */

#include "nsISupports.idl"

interface nsISimpleEnumerator;
interface nsIInputStream;
interface nsIPrincipal;
interface nsIFile;

[scriptable, uuid(6ca5e43e-9632-11d3-8cd9-0060b0fc14a3)]
interface nsIZipEntry : nsISupports
{
    readonly attribute string           name;
    readonly attribute unsigned short   compression;
    readonly attribute unsigned long    size;
    readonly attribute unsigned long    realSize;
    readonly attribute unsigned long    CRC32;
};

[scriptable, uuid(6ff6a966-9632-11d3-8cd9-0060b0fc14a3)]
interface nsIZipReader : nsISupports
{
    /**
     * Initializes a zip reader after construction.
     */
    void init(in nsIFile zipFile);

    /**
     * Opens a zip reader.
     */
	void open();

    /**
     * Parses meta-information for the jar format. Must be called before calls 
     * to getPrincipal and verifyExternalFile.
     */
	void parseManifest();

    /**
     * Closes a zip reader. Subsequent attempts to extract files or read from
     * its input stream will result in an error.
     */
	void close();

    /**
     * Extracts a zip entry into a local file specified by outFile.
     */
    void extract(in string zipEntry, in nsIFile outFile);

    /**
     * Returns a nsIZipEntry describing a specified zip entry.
     */
    nsIZipEntry getEntry(in string zipEntry);

    /**
     * Returns a simple enumerator whose elements are of type nsIZipEntry.
     */
	nsISimpleEnumerator/*<nsIZipEntry>*/ findEntries(in string aPattern);

    /**
     * Returns an input stream containing the contents of the specified zip entry.
     */
    nsIInputStream getInputStream(in string zipEntry);

    /**
     * Returns an object describing the owner (origin and/or signer) of 
     * an entry. parseManifest must be called first. If aEntryName is an
     * entry in the jar, it must have been read to its end by an input
     * stream returned through getInputStream. If aEntryName is an external
     * file with meta-information stored in the jar, verifyExternalFile 
     * must be called before getPrincipal.
     */
    nsIPrincipal getPrincipal(in string aEntryName);

    /**
     * Compares a file which is not in the jar to meta-information
     * about the file which is stored in the jar. Must be called after 
     * parseManifest and before 
     * calling getPrincipal on an external file (such as inline Javascript).
     * There must be an "external" entry in the manifest corresponding to
     * aFilename.
     */
    void verifyExternalFile(in string aFilename, in string aBuf, 
                            in unsigned long aBufLength);
};

%{C++

#define NS_ZIPREADER_CID                             \
{ /* 7526a738-9632-11d3-8cd9-0060b0fc14a3 */         \
    0x7526a738,                                      \
    0x9632,                                          \
    0x11d3,                                          \
    {0x8c, 0xd9, 0x00, 0x60, 0xb0, 0xfc, 0x14, 0xa3} \
}

%}