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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** 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 of 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 nsUnicodeFontMappingCache_h__
#define nsUnicodeFontMappingCache_h__
#include "plhash.h"
#include "nsCRT.h"
#include "nsString.h"
#include "nsUnicodeFontMappingMac.h"

class nsUnicodeFontMappingCache
{
public:
	nsUnicodeFontMappingCache() 
	{
		mTable = PL_NewHashTable(8, (PLHashFunction)HashKey, 
									(PLHashComparator)CompareKeys, 
									(PLHashComparator)CompareValues,
									nsnull, nsnull);
		mCount = 0;	
	};
	~nsUnicodeFontMappingCache() 
	{
		if (mTable)
		{
			PL_HashTableEnumerateEntries(mTable, FreeHashEntries, 0);
			PL_HashTableDestroy(mTable);
			mTable = nsnull;
		}
	};

	inline PRBool	Get(const nsString& key, nsUnicodeFontMappingMac **item)
	{
		*item = (nsUnicodeFontMappingMac*)PL_HashTableLookup(mTable, &key);
		return nsnull != (*item);
	};
	inline void	Set(const nsString& key, nsUnicodeFontMappingMac *item)
	{
		nsString *newKey = new nsString(key);
		if (newKey)
		{
			PL_HashTableAdd(mTable, newKey, item);
			mCount ++;
		}
	};

private:
	inline static PR_CALLBACK PLHashNumber HashKey(const void *aKey)
	{
    nsString* key = (nsString*)aKey;
		return nsCRT::HashCode(key->get());
	};
	inline static PR_CALLBACK PRIntn		CompareKeys(const void *v1, const void *v2)
	{
		return ((nsString *)v1) -> Equals(* ((nsString *)v2));
	};
	inline static PR_CALLBACK PRIntn		CompareValues(const void *v1, const void *v2)
	{
		return ((nsUnicodeFontMappingMac*)v1) -> Equals(* ((nsUnicodeFontMappingMac*)v2));
	};
	inline static PR_CALLBACK PRIntn		FreeHashEntries(PLHashEntry *he, PRIntn italic, void *arg)
	{
		delete (nsString*)he->key;
		delete (nsUnicodeFontMappingMac*)he->value;
		return HT_ENUMERATE_REMOVE;
	};

	struct PLHashTable*		mTable;
	PRUint32				mCount;
};

#endif /* nsUnicodeFontMappingCache_h__ */