1/*
2 * Copyright (C) 2009 Apple Inc. All right 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. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "JSCSSRuleList.h"
28
29#include "CSSRule.h"
30#include "CSSRuleList.h"
31#include "CSSStyleSheet.h"
32#include "JSCSSRuleCustom.h"
33#include "JSStyleSheetCustom.h"
34
35
36namespace WebCore {
37using namespace JSC;
38
39bool JSCSSRuleListOwner::isReachableFromOpaqueRoots(JSC::Handle<JSC::Unknown> handle, void*, SlotVisitor& visitor, const char** reason)
40{
41 JSCSSRuleList* jsCSSRuleList = jsCast<JSCSSRuleList*>(handle.slot()->asCell());
42 if (!jsCSSRuleList->hasCustomProperties(*jsCSSRuleList->vm()))
43 return false;
44
45 if (CSSStyleSheet* styleSheet = jsCSSRuleList->wrapped().styleSheet()) {
46 if (UNLIKELY(reason))
47 *reason = "CSSStyleSheet is opaque root";
48
49 return visitor.containsOpaqueRoot(root(styleSheet));
50 }
51
52 if (CSSRule* cssRule = jsCSSRuleList->wrapped().item(0)) {
53 if (UNLIKELY(reason))
54 *reason = "CSSRule is opaque root";
55
56 return visitor.containsOpaqueRoot(root(cssRule));
57 }
58 return false;
59}
60
61}
62