/* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 *
 * 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 nsIURI;
interface nsIInputStream;

/**
 * Interface implemented by objects capable of fixing up strings into URIs
 */
[scriptable, uuid(5e81f628-c57b-44af-9488-9f3ff367cbf4)]
interface nsIURIFixup : nsISupports
{
    /** No fixup flags. */
    const unsigned long FIXUP_FLAG_NONE = 0;

    /**
     * Allow the fixup to use a keyword lookup service to complete the URI.
     * The fixup object implementer should honour this flag and only perform
     * any lengthy keyword (or search) operation if it is set.
     */
    const unsigned long FIXUP_FLAG_ALLOW_KEYWORD_LOOKUP = 1;

    /**
     * Tell the fixup to make an alternate URI from the input URI, for example
     * to turn foo into www.foo.com.
     */
    const unsigned long FIXUP_FLAGS_MAKE_ALTERNATE_URI = 2;

    /**
     * Use UTF-8 to encode the URI instead of platform charset.
     */
    const unsigned long FIXUP_FLAG_USE_UTF8 = 4;
    
    /**
     * Fix common scheme typos.
     */
    const unsigned long FIXUP_FLAG_FIX_SCHEME_TYPOS = 5;

    /**
     * Converts an internal URI (e.g. a wyciwyg URI) into one which we can
     * expose to the user, for example on the URL bar.
     *
     * @param  aURI       The URI to be converted
     * @return nsIURI     The converted, exposable URI
     * @throws NS_ERROR_MALFORMED_URI when the exposable portion of aURI is malformed
     * @throws NS_ERROR_UNKNOWN_PROTOCOL when we can't get a protocol handler service
     *         for the URI scheme.
     */
    nsIURI createExposableURI(in nsIURI aURI);

    /**
     * Converts the specified string into a URI, first attempting
     * to correct any errors in the syntax or other vagaries. Returns
     * a wellformed URI or nullptr if it can't.
     *
     * @param aURIText    Candidate URI.
     * @param aFixupFlags Flags that govern ways the URI may be fixed up.
     * @param aPostData   The POST data to submit with the returned
     *                    URI (see nsISearchSubmission).
     */
    nsIURI createFixupURI(in AUTF8String aURIText, in unsigned long aFixupFlags,
                          [optional] out nsIInputStream aPostData);

    /**
     * Converts the specified keyword string into a URI.  Note that it's the
     * caller's responsibility to check whether keywords are enabled and
     * whether aKeyword is a sensible keyword.
     *
     * @param aKeyword  The keyword string to convert into a URI
     * @param aPostData The POST data to submit to the returned URI
     *                  (see nsISearchSubmission).
     *
     * @throws NS_ERROR_FAILURE if the resulting URI requires submission of POST
     *         data and aPostData is null.
     */
    nsIURI keywordToURI(in AUTF8String aKeyword,
                        [optional] out nsIInputStream aPostData);
};

