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/* -*- Mode: C++; tab-width: 2; 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 nsIChannel;

[scriptable, uuid(9575693c-60d9-4332-b6b8-6c29289339cb)]
interface nsIAboutModule : nsISupports 
{
    /**
     * Constructs a new channel for the about protocol module. 
     *
     * @param aURI the uri of the new channel
     */
    nsIChannel newChannel(in nsIURI aURI);

    /**
     * A flag that indicates whether a URI is safe for untrusted
     * content.  If it is, web pages and so forth will be allowed to
     * link to this about: URI, and the about: protocol handler will
     * enforce that the principal of channels created for it be based
     * on their originalURI or URI (depending on the channel flags),
     * by setting their "owner" to null.
     * Otherwise, only chrome will be able to link to it.
     */
    const unsigned long URI_SAFE_FOR_UNTRUSTED_CONTENT = (1 << 0);

    /**
     * A flag that indicates whether script should be enabled for the
     * given about: URI even if it's disabled in general.
     */
    const unsigned long ALLOW_SCRIPT = (1 << 1);

    /**
     * A flag that indicates whether this about: URI doesn't want to be listed
     * in about:about, especially if it's not useful without a query string.
     */
    const unsigned long HIDE_FROM_ABOUTABOUT = (1 << 2);

    /**
     * A method to get the flags that apply to a given about: URI.  The URI
     * passed in is guaranteed to be one of the URIs that this module
     * registered to deal with.
     */
    unsigned long getURIFlags(in nsIURI aURI);
};

%{C++

#define NS_ABOUT_MODULE_CONTRACTID        "@mozilla.org/network/protocol/about;1" 
#define NS_ABOUT_MODULE_CONTRACTID_PREFIX NS_ABOUT_MODULE_CONTRACTID "?what=" 
#define NS_ABOUT_MODULE_CONTRACTID_LENGTH 49      // strlen(NS_ABOUT_MODULE_CONTRACTID_PREFIX)

%}