1/*
2 * Copyright (C) 2004, 2006, 2006, 2008, 2009 Apple Inc. All rights reserved.
3 * Copyright (C) 2006 James G. Speth <speth@end.com>
4 * Copyright (C) 2006 Samuel Weinig <sam.weinig@gmail.com>
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
16 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
18 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
19 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
22 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
23 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#import "config.h"
29#import "DOMObject.h"
30
31#import "DOMHTMLLinkElementInternal.h"
32#import "DOMHTMLStyleElementInternal.h"
33#import "DOMInternal.h"
34#import "DOMProcessingInstructionInternal.h"
35#import "DOMStyleSheetInternal.h"
36#import "HTMLLinkElement.h"
37#import "HTMLStyleElement.h"
38#import "ProcessingInstruction.h"
39#import "StyleSheet.h"
40#import "WebScriptObjectPrivate.h"
41
42@implementation DOMObject
43
44// Prevent creation of DOM objects by clients who just "[[xxx alloc] init]".
45- (id)init
46{
47    [NSException raise:NSGenericException format:@"+[%@ init]: should never be used", NSStringFromClass([self class])];
48    [self release];
49    return nil;
50}
51
52- (void)dealloc
53{
54    if (_internal)
55        removeDOMWrapper(_internal);
56    [super dealloc];
57}
58
59- (id)copyWithZone:(NSZone *)unusedZone
60{
61    UNUSED_PARAM(unusedZone);
62    return [self retain];
63}
64
65@end
66
67@implementation DOMObject (DOMLinkStyle)
68
69- (DOMStyleSheet *)sheet
70{
71    WebCore::StyleSheet* styleSheet;
72
73    if ([self isKindOfClass:[DOMProcessingInstruction class]])
74        styleSheet = core(static_cast<DOMProcessingInstruction *>(self))->sheet();
75    else if ([self isKindOfClass:[DOMHTMLLinkElement class]])
76        styleSheet = core(static_cast<DOMHTMLLinkElement *>(self))->sheet();
77    else if ([self isKindOfClass:[DOMHTMLStyleElement class]])
78        styleSheet = core(static_cast<DOMHTMLStyleElement *>(self))->sheet();
79    else
80        return nil;
81
82    return kit(styleSheet);
83}
84
85@end
86