Source/core/rendering/style/CachedUAStyle.h

 /*
 * Copyright (C) 2013 Google, Inc.
 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
 * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 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 CachedUAStyle_h
#define CachedUAStyle_h

#include "core/rendering/style/RenderStyle.h"

namespace WebCore {

// RenderTheme::adjustStyle wants the background and borders
// as specified by the UA sheets, excluding any author rules.
// We use this class to cache those values during
// applyMatchedProperties for later use during adjustRenderStyle.
class CachedUAStyle {
public:
    CachedUAStyle()
        : hasAppearance(false)
        , backgroundLayers(BackgroundFillLayer)
    { }

    explicit CachedUAStyle(const RenderStyle* style)
        : hasAppearance(style->hasAppearance())
        , backgroundLayers(BackgroundFillLayer)
    {
        // RenderTheme::adjustStyle is the only consumer of this data.
        // It only cares about the styles if appearance is set,
        // so we cheat and don't bother to copy them when !hasAppearance.
        if (!hasAppearance)
            return;
        border = style->border();
        backgroundLayers = *style->backgroundLayers();
        backgroundColor = style->backgroundColor();
    }

    bool hasAppearance;
    BorderData border;
    FillLayer backgroundLayers;
    Color backgroundColor;
};


} // namespace WebCore

#endif // CachedUAStyle_h