/*

 * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 * 1.  Redistributions of source code must retain the above copyright

 *     notice, this list of conditions and the following disclaimer. 

 * 2.  Redistributions in binary form must reproduce the above copyright

 *     notice, this list of conditions and the following disclaimer in the

 *     documentation and/or other materials provided with the distribution. 

 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of

 *     its contributors may be used to endorse or promote products derived

 *     from this software without specific prior written permission. 

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY

 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY

 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND

 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

#ifndef FontCache_h

#define FontCache_h

#include <wtf/unicode/Unicode.h>

#if PLATFORM(WIN)

#include <mlang.h>

#endif

namespace WebCore

{

class AtomicString;

class FontData;

class FontPlatformData;

class Font;

class FontDescription;

class FontCache {

public:

    static const FontData* getFontData(const Font&, int& familyIndex);

    // This method is implemented by the platform.

    static const FontData* getFontDataForCharacters(const Font&, const UChar* characters, int length);

    // Also implemented by the platform.

    static void platformInit();

#if PLATFORM(WIN)

    static IMLangFontLink2* getFontLinkInterface();

#elif PLATFORM(SYMBIAN)

    static const AtomicString& systemFontFamilyName( const AtomicString& familyName );

    static FontPlatformData* getDeviceDefaultFont(float size);

#endif

private:

    static FontPlatformData* getCachedFontPlatformData(const FontDescription&, const AtomicString& family, bool checkingAlternateName = false);

    static FontData* getCachedFontData(const FontPlatformData*);

    // These three methods are implemented by each platform.

    static FontPlatformData* getSimilarFontPlatformData(const Font&);

    static FontPlatformData* getLastResortFallbackFont(const Font&);

    static FontPlatformData* createFontPlatformData(const FontDescription&, const AtomicString& family);

    friend class FontData;

    friend class FontFallbackList;

};

}

#endif