Source/WebCore/css/CSSVariableDependentValue.cpp

/*
 * Copyright (C) 2015 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
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 * 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 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 INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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#include "config.h"
#include "CSSVariableDependentValue.h"

#include "CSSCustomPropertyValue.h"
#include <wtf/text/AtomicStringHash.h>

namespace WebCore {

bool CSSVariableDependentValue::checkVariablesForCycles(const AtomicString& name, CustomPropertyValueMap& customProperties, const HashSet<AtomicString>& seenProperties, HashSet<AtomicString>& invalidProperties)
{
    if (invalidProperties.contains(name))
        return false;

    HashSet<AtomicString> newSeenProperties = seenProperties;
    newSeenProperties.add(name);
    
    bool valid = valueList().checkVariablesForCycles(customProperties, newSeenProperties, invalidProperties);
    if (!valid)
        invalidProperties.add(name);

    return valid;
}

}