/*

 * Copyright (C) 2007, 2008, 2009 Apple Inc. All rights 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 "JSStyleSheet.h"

#include "CSSStyleSheet.h"

#include "Node.h"

#include "JSCSSStyleSheet.h"

#include "JSNode.h"

using namespace JSC;

namespace WebCore {

JSValue toJS(ExecState* exec, JSDOMGlobalObject* globalObject, StyleSheet* styleSheet)

{

    if (!styleSheet)

        return jsNull();

    DOMObject* wrapper = getCachedDOMObjectWrapper(exec, styleSheet);

    if (wrapper)

        return wrapper;

    if (styleSheet->isCSSStyleSheet())

        wrapper = CREATE_DOM_OBJECT_WRAPPER(exec, globalObject, CSSStyleSheet, styleSheet);

    else

        wrapper = CREATE_DOM_OBJECT_WRAPPER(exec, globalObject, StyleSheet, styleSheet);

    return wrapper;

}

void JSStyleSheet::markChildren(MarkStack& markStack)

{

    Base::markChildren(markStack);

    StyleSheet* sheet = impl();

    JSGlobalData& globalData = *Heap::heap(this)->globalData();

    unsigned length = sheet->length();

    for (unsigned i = 0; i < length; ++i)

        markDOMObjectWrapper(markStack, globalData, sheet->item(i));

    // This prevents us from having a style sheet with a dangling ownerNode pointer.

    // A better solution would be to handle this on the DOM side -- if the style sheet

    // is kept around, then we want the node to stay around too. One possibility would

    // be to make ref/deref on the style sheet ref/deref the node instead, but there's

    // a lot of disentangling of the CSS DOM objects that would need to happen first.

    if (Node* ownerNode = sheet->ownerNode())

        markDOMNodeWrapper(markStack, ownerNode->document(), ownerNode);

}

} // namespace WebCore