/* ***** 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 i-DNS.net International, Inc. code.
 *
 * The Initial Developer of the Original Code is
 * i-DNS.net International.
 * Portions created by the Initial Developer are Copyright (C) 2001
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s): bobj@netscape.com,
 *                 brendan@mozilla.org,
 *                 darin@netscape.com,
 *                 ftang@netscape.com,
 *                 gagan@netscape.com,
 *                 nhotta@netscape.com,
 *                 william.tan@i-dns.net
 *                 dwitte@stanford.edu
 *
 *
 * 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
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include "nsISupports.idl"

/**
 * nsIIDNService interface.
 *
 * IDN (Internationalized Domain Name) support. Provides facilities
 * for manipulating IDN hostnames according to the specification set
 * forth by the IETF.
 *
 * IDN effort:
 * http://www.ietf.org/html.characters/idn-charter.html
 * http://www.i-dns.net
 *
 * IDNA specification:
 * http://search.ietf.org/internet-drafts/draft-ietf-idn-idna-06.txt
 */

[scriptable, uuid(a592a60e-3621-4f19-a318-2bf233cfad3e)]
interface nsIIDNService : nsISupports
{
    /**
     * Prepares the input hostname according to IDNA ToASCII operation,
     * the input hostname is assumed to be UTF8-encoded.
     */
    ACString convertUTF8toACE(in AUTF8String input);


    /**
     * This is the ToUnicode operation as specified in the IDNA proposal,
     * with an additional step to encode the result in UTF-8.
     * It takes an ACE-encoded hostname and performs ToUnicode to it, then
     * encodes the resulting string into UTF8.
     */
    AUTF8String convertACEtoUTF8(in ACString input);

    /**
     * Checks if the input string is ACE encoded or not.
     */
    boolean isACE(in ACString input);

    /**
     * Performs the unicode normalization needed for hostnames in IDN,
     * for callers that want early normalization.
     */
    AUTF8String normalize(in AUTF8String input);

    /**
     * Normalizes and converts a host to UTF-8 if the host is in the IDN
     * whitelist, otherwise converts it to ACE. This is useful for display
     * purposes and to ensure an encoding consistent with nsIURI::GetHost().
     * If the result is ASCII or ACE encoded, |isASCII| will be true.
     */
    AUTF8String convertToDisplayIDN(in AUTF8String input, out boolean isASCII);
};