/*

 * (C) 1999-2003 Lars Knoll (knoll@kde.org)

 * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Library General Public

 * License as published by the Free Software Foundation; either

 * version 2 of the License, or (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Library General Public License for more details.

 *

 * You should have received a copy of the GNU Library General Public License

 * along with this library; see the file COPYING.LIB.  If not, write to

 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,

 * Boston, MA 02110-1301, USA.

 */

#ifndef CSSValue_h

#define CSSValue_h

#include "StyleBase.h"

#include "CSSParserValues.h"

#include "KURLHash.h"

#include <wtf/ListHashSet.h>

#include <wtf/RefPtr.h>

namespace WebCore {

class CSSStyleSheet;

typedef int ExceptionCode;

class CSSValue : public RefCounted<CSSValue> {

public:

    // FIXME: Change name to Type.

    enum UnitTypes {

        CSS_INHERIT = 0,

        CSS_PRIMITIVE_VALUE = 1,

        CSS_VALUE_LIST = 2,

        CSS_CUSTOM = 3,

        CSS_INITIAL = 4

    };

    virtual ~CSSValue() { }

    // FIXME: Change this to return UnitTypes.

    virtual unsigned short cssValueType() const { return CSS_CUSTOM; }

    virtual String cssText() const = 0;

    void setCssText(const String&, ExceptionCode&) { } // FIXME: Not implemented.

    virtual bool isFontValue() const { return false; }

    virtual bool isImageGeneratorValue() const { return false; }

    virtual bool isImageValue() const { return false; }

    virtual bool isImplicitInitialValue() const { return false; }

    virtual bool isPrimitiveValue() const { return false; }

    virtual bool isTimingFunctionValue() const { return false; }

    virtual bool isValueList() const { return false; }

    virtual bool isWebKitCSSTransformValue() const { return false; }

#if ENABLE(SVG)

    virtual bool isSVGColor() const { return false; }

    virtual bool isSVGPaint() const { return false; }

#endif

    virtual bool isVariableDependentValue() const { return false; }

    virtual CSSParserValue parserValue() const { ASSERT_NOT_REACHED(); return CSSParserValue(); }

    virtual void addSubresourceStyleURLs(ListHashSet<KURL>&, const CSSStyleSheet*) { }

};

} // namespace WebCore

#endif // CSSValue_h