third_party/WebKit/Source/core/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 <memory>
#include "core/style/ComputedStyle.h"
#include "platform/wtf/Allocator.h"
#include "platform/wtf/Noncopyable.h"
#include "platform/wtf/PtrUtil.h"

namespace blink {

// LayoutTheme::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 AdjustComputedStyle.
class CachedUAStyle {
  USING_FAST_MALLOC(CachedUAStyle);
  WTF_MAKE_NONCOPYABLE(CachedUAStyle);

 public:
  static std::unique_ptr<CachedUAStyle> Create(const ComputedStyle* style) {
    return WTF::WrapUnique(new CachedUAStyle(style));
  }

  BorderData border;
  LengthSize top_left_;
  LengthSize top_right_;
  LengthSize bottom_left_;
  LengthSize bottom_right_;
  FillLayer background_layers;
  StyleColor background_color;

 private:
  explicit CachedUAStyle(const ComputedStyle* style)
      : border(style->Border()),
        top_left_(style->BorderTopLeftRadius()),
        top_right_(style->BorderTopRightRadius()),
        bottom_left_(style->BorderBottomLeftRadius()),
        bottom_right_(style->BorderBottomRightRadius()),
        background_layers(style->BackgroundLayers()),
        background_color(style->BackgroundColor()) {}
};

}  // namespace blink

#endif  // CachedUAStyle_h