/*

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

 * Copyright (C) 2004, 2005, 2006, 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 CSSStyleDeclaration_h

#define CSSStyleDeclaration_h

#include "StyleBase.h"

#include <wtf/Forward.h>

namespace WebCore {

class CSSMutableStyleDeclaration;

class CSSProperty;

class CSSRule;

class CSSValue;

typedef int ExceptionCode;

class CSSStyleDeclaration : public StyleBase {

public:

    static bool isPropertyName(const String&);

    CSSRule* parentRule() const;

    virtual String cssText() const = 0;

    virtual void setCssText(const String&, ExceptionCode&) = 0;

    unsigned length() const { return virtualLength(); }

    virtual unsigned virtualLength() const = 0;

    bool isEmpty() const { return !length(); }

    virtual String item(unsigned index) const = 0;

    PassRefPtr<CSSValue> getPropertyCSSValue(const String& propertyName);

    String getPropertyValue(const String& propertyName);

    String getPropertyPriority(const String& propertyName);

    String getPropertyShorthand(const String& propertyName);

    bool isPropertyImplicit(const String& propertyName);

    virtual PassRefPtr<CSSValue> getPropertyCSSValue(int propertyID) const = 0;

    virtual String getPropertyValue(int propertyID) const = 0;

    virtual bool getPropertyPriority(int propertyID) const = 0;

    virtual int getPropertyShorthand(int propertyID) const = 0;

    virtual bool isPropertyImplicit(int propertyID) const = 0;

    void setProperty(const String& propertyName, const String& value, ExceptionCode&);

    void setProperty(const String& propertyName, const String& value, const String& priority, ExceptionCode&);

    String removeProperty(const String& propertyName, ExceptionCode&);

    virtual void setProperty(int propertyId, const String& value, bool important, ExceptionCode&) = 0;

    virtual String removeProperty(int propertyID, ExceptionCode&) = 0;

    virtual PassRefPtr<CSSMutableStyleDeclaration> copy() const = 0;

    virtual PassRefPtr<CSSMutableStyleDeclaration> makeMutable() = 0;

    void diff(CSSMutableStyleDeclaration*) const;

    PassRefPtr<CSSMutableStyleDeclaration> copyPropertiesInSet(const int* set, unsigned length) const;

protected:

    CSSStyleDeclaration(CSSRule* parentRule = 0);

    virtual bool cssPropertyMatches(const CSSProperty*) const;

};

} // namespace WebCore

#endif // CSSStyleDeclaration_h