/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** 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) 1998
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * 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 ***** */

#ifndef nsAboutProtocolHandler_h___
#define nsAboutProtocolHandler_h___

#include "nsIProtocolHandler.h"
#include "nsSimpleNestedURI.h"

class nsCString;
class nsIAboutModule;

class nsAboutProtocolHandler : public nsIProtocolHandler
{
public:
    NS_DECL_ISUPPORTS

    // nsIProtocolHandler methods:
    NS_DECL_NSIPROTOCOLHANDLER

    // nsAboutProtocolHandler methods:
    nsAboutProtocolHandler() {}
    virtual ~nsAboutProtocolHandler() {}
};

class nsSafeAboutProtocolHandler : public nsIProtocolHandler
{
public:
    NS_DECL_ISUPPORTS

    // nsIProtocolHandler methods:
    NS_DECL_NSIPROTOCOLHANDLER

    // nsSafeAboutProtocolHandler methods:
    nsSafeAboutProtocolHandler() {}

private:
    ~nsSafeAboutProtocolHandler() {}
};


// Class to allow us to propagate the base URI to about:blank correctly
class nsNestedAboutURI : public nsSimpleNestedURI {
public:
    NS_DECL_NSIIPCSERIALIZABLE

    nsNestedAboutURI(nsIURI* aInnerURI, nsIURI* aBaseURI)
        : nsSimpleNestedURI(aInnerURI)
        , mBaseURI(aBaseURI)
    {}

    // For use only from deserialization
    nsNestedAboutURI() : nsSimpleNestedURI() {}

    virtual ~nsNestedAboutURI() {}

    // Override QI so we can QI to our CID as needed
    NS_IMETHOD QueryInterface(REFNSIID aIID, void** aInstancePtr);

    // Override StartClone(), the nsISerializable methods, and
    // GetClassIDNoAlloc; this last is needed to make our nsISerializable impl
    // work right.
    virtual nsSimpleURI* StartClone();
    NS_IMETHOD Read(nsIObjectInputStream* aStream);
    NS_IMETHOD Write(nsIObjectOutputStream* aStream);
    NS_IMETHOD GetClassIDNoAlloc(nsCID *aClassIDNoAlloc);

    nsIURI* GetBaseURI() const {
        return mBaseURI;
    }

protected:
    nsCOMPtr<nsIURI> mBaseURI;
};

#endif /* nsAboutProtocolHandler_h___ */
