third_party/WebKit/Source/core/style/NinePieceImage.h

/*
 * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
 *           (C) 2000 Antti Koivisto (koivisto@kde.org)
 *           (C) 2000 Dirk Mueller (mueller@kde.org)
 * Copyright (C) 2003, 2005, 2006, 2007, 2008, 2013 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 "core/CoreExport.h"
#include "core/style/BorderImageLengthBox.h"
#include "core/style/DataRef.h"
#include "core/style/StyleImage.h"
#include "platform/LayoutUnit.h"
#include "platform/LengthBox.h"
#include "wtf/Allocator.h"
#include "wtf/RefCounted.h"

namespace blink {

enum ENinePieceImageRule {
  StretchImageRule,
  RoundImageRule,
  SpaceImageRule,
  RepeatImageRule
};

class CORE_EXPORT NinePieceImageData : public RefCounted<NinePieceImageData> {
 public:
  static PassRefPtr<NinePieceImageData> create() {
    return adoptRef(new NinePieceImageData);
  }
  PassRefPtr<NinePieceImageData> copy() const {
    return adoptRef(new NinePieceImageData(*this));
  }

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

  unsigned fill : 1;
  unsigned horizontalRule : 2;  // ENinePieceImageRule
  unsigned verticalRule : 2;    // ENinePieceImageRule
  Persistent<StyleImage> image;
  LengthBox imageSlices;
  BorderImageLengthBox borderSlices;
  BorderImageLengthBox outset;

 private:
  NinePieceImageData();
  NinePieceImageData(const NinePieceImageData&);
};

class CORE_EXPORT NinePieceImage {
  DISALLOW_NEW();

 public:
  NinePieceImage();
  NinePieceImage(StyleImage*,
                 LengthBox imageSlices,
                 bool fill,
                 const BorderImageLengthBox& borderSlices,
                 const BorderImageLengthBox& outset,
                 ENinePieceImageRule horizontalRule,
                 ENinePieceImageRule verticalRule);

  bool operator==(const NinePieceImage& other) const {
    return m_data == other.m_data;
  }
  bool operator!=(const NinePieceImage& other) const {
    return m_data != other.m_data;
  }

  bool hasImage() const { return m_data->image; }
  StyleImage* image() const { return m_data->image.get(); }
  void setImage(StyleImage* image) { m_data.access()->image = image; }

  const LengthBox& imageSlices() const { return m_data->imageSlices; }
  void setImageSlices(const LengthBox& slices) {
    m_data.access()->imageSlices = slices;
  }

  bool fill() const { return m_data->fill; }
  void setFill(bool fill) { m_data.access()->fill = fill; }

  const BorderImageLengthBox& borderSlices() const {
    return m_data->borderSlices;
  }
  void setBorderSlices(const BorderImageLengthBox& slices) {
    m_data.access()->borderSlices = slices;
  }

  const BorderImageLengthBox& outset() const { return m_data->outset; }
  void setOutset(const BorderImageLengthBox& outset) {
    m_data.access()->outset = outset;
  }

  ENinePieceImageRule horizontalRule() const {
    return static_cast<ENinePieceImageRule>(m_data->horizontalRule);
  }
  void setHorizontalRule(ENinePieceImageRule rule) {
    m_data.access()->horizontalRule = rule;
  }

  ENinePieceImageRule verticalRule() const {
    return static_cast<ENinePieceImageRule>(m_data->verticalRule);
  }
  void setVerticalRule(ENinePieceImageRule rule) {
    m_data.access()->verticalRule = rule;
  }

  void copyImageSlicesFrom(const NinePieceImage& other) {
    m_data.access()->imageSlices = other.m_data->imageSlices;
    m_data.access()->fill = other.m_data->fill;
  }

  void copyBorderSlicesFrom(const NinePieceImage& other) {
    m_data.access()->borderSlices = other.m_data->borderSlices;
  }

  void copyOutsetFrom(const NinePieceImage& other) {
    m_data.access()->outset = other.m_data->outset;
  }

  void copyRepeatFrom(const NinePieceImage& other) {
    m_data.access()->horizontalRule = other.m_data->horizontalRule;
    m_data.access()->verticalRule = other.m_data->verticalRule;
  }

  void setMaskDefaults() {
    m_data.access()->imageSlices = LengthBox(0);
    m_data.access()->fill = true;
    m_data.access()->borderSlices = BorderImageLengthBox(Length(Auto));
  }

  static LayoutUnit computeOutset(const BorderImageLength& outsetSide,
                                  int borderSide) {
    if (outsetSide.isNumber())
      return LayoutUnit(outsetSide.number() * borderSide);
    return LayoutUnit(outsetSide.length().value());
  }

 private:
  DataRef<NinePieceImageData> m_data;
};

}  // namespace blink

#endif  // NinePieceImage_h