JSValue* JSTreeWalker::getValueProperty(ExecState* exec, int token) const
{
    switch (token) {
    case RootAttrNum: {
        TreeWalker* imp = static_cast<TreeWalker*>(impl());
        return toJS(exec, WTF::getPtr(imp->root()));
    }
    case WhatToShowAttrNum: {
        TreeWalker* imp = static_cast<TreeWalker*>(impl());
        return jsNumber(exec, imp->whatToShow());
    }
    case FilterAttrNum: {
        TreeWalker* imp = static_cast<TreeWalker*>(impl());
        return toJS(exec, WTF::getPtr(imp->filter()));
    }
    case ExpandEntityReferencesAttrNum: {
        TreeWalker* imp = static_cast<TreeWalker*>(impl());
        return jsBoolean(imp->expandEntityReferences());
    }
    case CurrentNodeAttrNum: {
        TreeWalker* imp = static_cast<TreeWalker*>(impl());
        return toJS(exec, WTF::getPtr(imp->currentNode()));
    }
    }
    return 0;
}

static v8::Handle<v8::Value> parentNodeCallback(const v8::Arguments& args)
{
    TreeWalker* imp = V8TreeWalker::toNative(args.Holder());
    ScriptState* currentState = ScriptState::current();
    if (!currentState)
        return v8Undefined();
    ScriptState& state = *currentState;
    RefPtr<Node> result = imp->parentNode(&state);
    if (state.hadException()) {
        v8::Local<v8::Value> exception = state.exception();
        state.clearException();
        return throwError(exception, args.GetIsolate());
    }
    return toV8(result.release(), args.Holder(), args.GetIsolate());
}

static v8::Handle<v8::Value> currentNodeAttrGetter(v8::Local<v8::String> name, const v8::AccessorInfo& info)
{
    TreeWalker* imp = V8TreeWalker::toNative(info.Holder());
    return toV8Fast(imp->currentNode(), info, imp);
}

static v8::Handle<v8::Value> expandEntityReferencesAttrGetter(v8::Local<v8::String> name, const v8::AccessorInfo& info)
{
    TreeWalker* imp = V8TreeWalker::toNative(info.Holder());
    return v8Boolean(imp->expandEntityReferences(), info.GetIsolate());
}

static v8::Handle<v8::Value> whatToShowAttrGetter(v8::Local<v8::String> name, const v8::AccessorInfo& info)
{
    TreeWalker* imp = V8TreeWalker::toNative(info.Holder());
    return v8UnsignedInteger(imp->whatToShow(), info.GetIsolate());
}