1/*
2 * Copyright (C) 2014 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "InjectedBundleCSSStyleDeclarationHandle.h"
28
29#include <WebCore/CSSStyleDeclaration.h>
30#include <wtf/HashMap.h>
31#include <wtf/NeverDestroyed.h>
32
33namespace WebKit {
34using namespace WebCore;
35
36typedef HashMap<CSSStyleDeclaration*, InjectedBundleCSSStyleDeclarationHandle*> DOMStyleDeclarationHandleCache;
37
38static DOMStyleDeclarationHandleCache& domStyleDeclarationHandleCache()
39{
40 static NeverDestroyed<DOMStyleDeclarationHandleCache> cache;
41 return cache;
42}
43
44RefPtr<InjectedBundleCSSStyleDeclarationHandle> InjectedBundleCSSStyleDeclarationHandle::getOrCreate(CSSStyleDeclaration* styleDeclaration)
45{
46 if (!styleDeclaration)
47 return nullptr;
48
49 DOMStyleDeclarationHandleCache::AddResult result = domStyleDeclarationHandleCache().add(styleDeclaration, nullptr);
50 if (!result.isNewEntry)
51 return result.iterator->value;
52
53 auto styleDeclarationHandle = adoptRef(*new InjectedBundleCSSStyleDeclarationHandle(*styleDeclaration));
54 result.iterator->value = styleDeclarationHandle.ptr();
55 return styleDeclarationHandle;
56}
57
58InjectedBundleCSSStyleDeclarationHandle::InjectedBundleCSSStyleDeclarationHandle(CSSStyleDeclaration& styleDeclaration)
59 : m_styleDeclaration(styleDeclaration)
60{
61}
62
63InjectedBundleCSSStyleDeclarationHandle::~InjectedBundleCSSStyleDeclarationHandle()
64{
65 domStyleDeclarationHandleCache().remove(m_styleDeclaration.ptr());
66}
67
68} // namespace WebKit
69