Source/WebCore/bindings/js/JSCSSRuleListCustom.cpp

/*
 * Copyright (C) 2009 Apple Inc. All right 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 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.
 */

#include "config.h"
#include "JSCSSRuleList.h"

#include "CSSRule.h"
#include "CSSRuleList.h"
#include "CSSStyleSheet.h"
#include "JSNode.h"

using namespace JSC;

namespace WebCore {

bool JSCSSRuleListOwner::isReachableFromOpaqueRoots(JSC::Handle<JSC::Unknown> handle, void*, SlotVisitor& visitor)
{
    JSCSSRuleList* jsCSSRuleList = jsCast<JSCSSRuleList*>(handle.get().asCell());
    if (!jsCSSRuleList->hasCustomProperties())
        return false;
    if (CSSStyleSheet* styleSheet = jsCSSRuleList->impl()->styleSheet())
        return visitor.containsOpaqueRoot(root(styleSheet));
    if (CSSRule* cssRule = jsCSSRuleList->impl()->item(0))
        return visitor.containsOpaqueRoot(root(cssRule));
    return false;
}

}