/*

 * Copyright (C) 2010 Google 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.

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 INC. OR

 * 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. 

 */

#import "config.h"

#import "KillRing.h"

namespace WebCore {

extern "C" {

// Kill ring calls. Would be better to use NSKillRing.h, but that's not available as API or SPI.

void _NSInitializeKillRing();

void _NSAppendToKillRing(NSString *);

void _NSPrependToKillRing(NSString *);

NSString *_NSYankFromKillRing();

void _NSNewKillRingSequence();

void _NSSetKillRingToYankedState();

}

static void initializeKillRingIfNeeded()

{

    static bool initializedKillRing = false;

    if (!initializedKillRing) {

        initializedKillRing = true;

        _NSInitializeKillRing();

    }

}

void KillRing::append(const String& string)

{

    initializeKillRingIfNeeded();

    _NSAppendToKillRing(string);

}

void KillRing::prepend(const String& string)

{

    initializeKillRingIfNeeded();

    _NSPrependToKillRing(string);

}

String KillRing::yank()

{

    initializeKillRingIfNeeded();

    return _NSYankFromKillRing();

}

void KillRing::startNewSequence()

{

    initializeKillRingIfNeeded();

    _NSNewKillRingSequence();

}

void KillRing::setToYankedState()

{

    initializeKillRingIfNeeded();

    _NSSetKillRingToYankedState();

}

} // namespace WebCore