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      1  /*
      2  * Copyright (C) 2013 Google, Inc.
      3  * Copyright (C) 1999 Lars Knoll (knoll (at) kde.org)
      4  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
      5  *
      6  * This library is free software; you can redistribute it and/or
      7  * modify it under the terms of the GNU Library General Public
      8  * License as published by the Free Software Foundation; either
      9  * version 2 of the License, or (at your option) any later version.
     10  *
     11  * This library is distributed in the hope that it will be useful,
     12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     14  * Library General Public License for more details.
     15  *
     16  * You should have received a copy of the GNU Library General Public License
     17  * along with this library; see the file COPYING.LIB.  If not, write to
     18  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     19  * Boston, MA 02110-1301, USA.
     20  */
     21 
     22 #ifndef CachedUAStyle_h
     23 #define CachedUAStyle_h
     24 
     25 #include "core/rendering/style/RenderStyle.h"
     26 
     27 namespace WebCore {
     28 
     29 // RenderTheme::adjustStyle wants the background and borders
     30 // as specified by the UA sheets, excluding any author rules.
     31 // We use this class to cache those values during
     32 // applyMatchedProperties for later use during adjustRenderStyle.
     33 class CachedUAStyle {
     34 public:
     35     CachedUAStyle()
     36         : hasAppearance(false)
     37         , backgroundLayers(BackgroundFillLayer)
     38     { }
     39 
     40     explicit CachedUAStyle(const RenderStyle* style)
     41         : hasAppearance(style->hasAppearance())
     42         , backgroundLayers(BackgroundFillLayer)
     43     {
     44         // RenderTheme::adjustStyle is the only consumer of this data.
     45         // It only cares about the styles if appearance is set,
     46         // so we cheat and don't bother to copy them when !hasAppearance.
     47         if (!hasAppearance)
     48             return;
     49         border = style->border();
     50         backgroundLayers = *style->backgroundLayers();
     51         backgroundColor = style->backgroundColor();
     52     }
     53 
     54     bool hasAppearance;
     55     BorderData border;
     56     FillLayer backgroundLayers;
     57     StyleColor backgroundColor;
     58 };
     59 
     60 
     61 } // namespace WebCore
     62 
     63 #endif // CachedUAStyle_h
     64