/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 *
 * 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.org code.
 *
 * 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): 
 */

#ifndef nsPersistentProperties_h___
#define nsPersistentProperties_h___

#include "nsIPersistentProperties.h"

class nsIUnicharInputStream;

class nsPersistentProperties : public nsIPersistentProperties
{
public:
  nsPersistentProperties();
  virtual ~nsPersistentProperties();

  NS_DECL_ISUPPORTS
  NS_DECL_NSIPROPERTIES

  // nsIPersistentProperties methods:
  NS_IMETHOD Load(nsIInputStream* aIn);
  NS_IMETHOD Save(nsIOutputStream* aOut, const nsString& aHeader);
  NS_IMETHOD Subclass(nsIPersistentProperties* aSubclass);
  NS_IMETHOD EnumerateProperties(nsIBidirectionalEnumerator* *aResult);

  // XXX these 2 methods will be subsumed by the ones from 
  // nsIProperties once we figure this all out
  NS_IMETHOD GetStringProperty(const nsString& aKey, nsString& aValue);
  NS_IMETHOD SetStringProperty(const nsString& aKey, nsString& aNewValue,
                         nsString& aOldValue);

  // nsPersistentProperties methods:
  PRInt32 Read();
  PRInt32 SkipLine(PRInt32 c);
  PRInt32 SkipWhiteSpace(PRInt32 c);

  static NS_METHOD
  Create(nsISupports *aOuter, REFNSIID aIID, void **aResult);

protected:
  nsIUnicharInputStream* mIn;
  nsIPersistentProperties* mSubclass;
  struct PLHashTable*    mTable;
};

class nsPropertyElement : public nsIPropertyElement 
{
public:
	nsPropertyElement();
	virtual ~nsPropertyElement();

	NS_DECL_ISUPPORTS

	static NS_METHOD
	Create(nsISupports *aOuter, REFNSIID aIID, void **aResult);

	// nsIPropertyElement methods:
	NS_IMETHOD GetKey(nsString** aReturnKey);
	NS_IMETHOD GetValue(nsString** aReturnValue);
	NS_IMETHOD SetKey(nsString* aKey);
	NS_IMETHOD SetValue(nsString* aValue);

protected:
	nsString* mKey;
	nsString* mValue;
};

#endif /* nsPersistentProperties_h___ */