/*******************************************************************************

 * All rights reserved. This program and the accompanying materials

 * are made available under the terms of the Eclipse Public License v1.0

 * which accompanies this distribution, and is available at

 * http://www.eclipse.org/legal/epl-v10.html

 *

 * Contributors:

 *     Nokia Corporation - initial implementation

 *******************************************************************************/

#include <QFont>

#include "swtfontcache.h"

#include "swtlog.h"

#define SWTFONTCACHE_GRANULARITY 10

namespace Java { namespace eSWT {

SwtFontCache::SwtFontCache() : mFonts(NULL), mSize(0), mCount(0)

{

}

SwtFontCache::~SwtFontCache()

{

    for(int i = 0; i < mCount; ++i)

    {

        delete mFonts[i];

        mFonts[i] = NULL;

    }

    delete[] mFonts;

    mFonts = NULL;

}

QFont* SwtFontCache::cache(QFont* aFont)

{

    QFont* cached = findEqual( aFont );

    if( cached )

    {

        delete aFont;

        aFont = NULL;

    }

    else

    {

        add( aFont );

        cached = aFont;

    }

    return cached;

}

bool SwtFontCache::isCached(const QFont* const aFont)

{

    for(int i = 0; i < mCount; ++i)

    {

        if(mFonts[i] == aFont)

        {

            return true;

        }

    }

    return false;

}

QFont* SwtFontCache::findEqual(QFont* aFont)

{

    if(aFont == NULL)

    {

        return NULL;

    }

    for(int i = 0; i < mCount; ++i)

    {

        if( *(mFonts[i]) == *aFont )

        {

            return mFonts[i];

        }

    }

    return NULL;

}

void SwtFontCache::add(QFont* aFont)

{

    if(mSize == mCount)

    {

        const int newSize = mSize + SWTFONTCACHE_GRANULARITY;

        QFont** bigger = new QFont* [newSize];

        if(mFonts != NULL)

        {

            ::memcpy( bigger, mFonts, mSize * sizeof(QFont*) );

            delete[] mFonts;

        }

        ::memset( &bigger[mSize], 0, (newSize - mSize) * sizeof(QFont*) );

        mFonts = bigger;

        mSize = newSize;

    }

    mFonts[mCount++] = aFont;

}

}}