/*

 * Copyright (C) 2004, 2006, 2006, 2008, 2009 Apple Inc. All rights reserved.

 * Copyright (C) 2006 James G. Speth <speth@end.com>

 * Copyright (C) 2006 Samuel Weinig <sam.weinig@gmail.com>

 *

 * 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 COMPUTER, 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 COMPUTER, 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 "DOMObject.h"

#import "DOMHTMLLinkElementInternal.h"

#import "DOMHTMLStyleElementInternal.h"

#import "DOMInternal.h"

#import "DOMProcessingInstructionInternal.h"

#import "DOMStyleSheetInternal.h"

#import "HTMLLinkElement.h"

#import "HTMLStyleElement.h"

#import "ProcessingInstruction.h"

#import "StyleSheet.h"

#import "WebScriptObjectPrivate.h"

#import <wtf/UnusedParam.h>

@implementation DOMObject

// Prevent creation of DOM objects by clients who just "[[xxx alloc] init]".

- (id)init

{

    [NSException raise:NSGenericException format:@"+[%@ init]: should never be used", NSStringFromClass([self class])];

    [self release];

    return nil;

}

- (void)dealloc

{

    if (_internal)

        removeDOMWrapper(_internal);

    [super dealloc];

}

- (id)copyWithZone:(NSZone *)unusedZone

{

    UNUSED_PARAM(unusedZone);

    return [self retain];

}

@end

@implementation DOMObject (DOMLinkStyle)

- (DOMStyleSheet *)sheet

{

    WebCore::StyleSheet* styleSheet;

    if ([self isKindOfClass:[DOMProcessingInstruction class]])

        styleSheet = core(static_cast<DOMProcessingInstruction *>(self))->sheet();

    else if ([self isKindOfClass:[DOMHTMLLinkElement class]])

        styleSheet = core(static_cast<DOMHTMLLinkElement *>(self))->sheet();

    else if ([self isKindOfClass:[DOMHTMLStyleElement class]])

        styleSheet = core(static_cast<DOMHTMLStyleElement *>(self))->sheet();

    else

        return nil;

    return kit(styleSheet);

}

@end