Source/WebCore/bindings/js/JSNamedNodeMapCustom.cpp

/*
 * Copyright (C) 2007, 2008, 2009 Apple Inc. All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
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 *    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,
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#include "config.h"
#include "JSNamedNodeMap.h"

#include "JSNode.h"

#include "Element.h"
#include "NamedNodeMap.h"

using namespace JSC;

namespace WebCore {

bool JSNamedNodeMap::canGetItemsForName(ExecState*, NamedNodeMap* impl, PropertyName propertyName)
{
    return impl->getNamedItem(propertyNameToString(propertyName));
}

JSValue JSNamedNodeMap::nameGetter(ExecState* exec, JSValue slotBase, PropertyName propertyName)
{
    JSNamedNodeMap* thisObj = jsCast<JSNamedNodeMap*>(asObject(slotBase));
    return toJS(exec, thisObj->globalObject(), thisObj->impl()->getNamedItem(propertyNameToString(propertyName)));
}

void JSNamedNodeMap::visitChildren(JSCell* cell, SlotVisitor& visitor)
{
    JSNamedNodeMap* thisObject = jsCast<JSNamedNodeMap*>(cell);
    ASSERT_GC_OBJECT_INHERITS(thisObject, &s_info);
    COMPILE_ASSERT(StructureFlags & OverridesVisitChildren, OverridesVisitChildrenWithoutSettingFlag);
    ASSERT(thisObject->structure()->typeInfo().overridesVisitChildren());
    Base::visitChildren(thisObject, visitor);

    // We need to keep the wrapper for our underlying NamedNodeMap's element
    // alive because NamedNodeMap and Attr rely on the element for data, and
    // don't know how to keep it alive correctly.
    // FIXME: Fix this lifetime issue in the DOM, and remove this.
    Element* element = thisObject->impl()->element();
    if (!element)
        return;
    visitor.addOpaqueRoot(root(element));
}

} // namespace WebCore