ninepieceimage.h

linux下开源浏览器WebKit的源码,市面上的很多商用浏览器都是移植自WebKit

/*
 * Copyright (C) 2000 Lars Knoll ([e-mail])
 *           (C) 2000 Antti Koivisto ([e-mail])
 *           (C) 2000 Dirk Mueller ([e-mail])
 * Copyright (C) 2003, 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 NinePieceImage_h
#define NinePieceImage_h

#include "LengthBox.h"
#include "StyleImage.h"

namespace WebCore {

enum ENinePieceImageRule {
    StretchImageRule, RoundImageRule, RepeatImageRule
};

class NinePieceImage {
public:
    NinePieceImage()
        : m_image(0)
        , m_horizontalRule(StretchImageRule)
        , m_verticalRule(StretchImageRule)
    {
    }

    NinePieceImage(StyleImage* image, LengthBox slices, ENinePieceImageRule h, ENinePieceImageRule v) 
      : m_image(image)
      , m_slices(slices)
      , m_horizontalRule(h)
      , m_verticalRule(v)
    {
    }

    bool operator==(const NinePieceImage& o) const;
    bool operator!=(const NinePieceImage& o) const { return !(*this == o); }

    bool hasImage() const { return m_image != 0; }
    StyleImage* image() const { return m_image.get(); }
    
    ENinePieceImageRule horizontalRule() const { return static_cast<ENinePieceImageRule>(m_horizontalRule); }
    ENinePieceImageRule verticalRule() const { return static_cast<ENinePieceImageRule>(m_verticalRule); }
    
    RefPtr<StyleImage> m_image;
    LengthBox m_slices;
    unsigned m_horizontalRule : 2; // ENinePieceImageRule
    unsigned m_verticalRule : 2; // ENinePieceImageRule
};

} // namespace WebCore

#endif // NinePieceImage_h