/*
 * 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 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 THIRD_PARTY_BLINK_RENDERER_CORE_STYLE_STYLE_GENERATED_IMAGE_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_STYLE_STYLE_GENERATED_IMAGE_H_

#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/css/css_to_length_conversion_data.h"
#include "third_party/blink/renderer/core/style/style_image.h"
#include "third_party/blink/renderer/platform/heap/garbage_collected.h"
#include "third_party/blink/renderer/platform/heap/member.h"
#include "third_party/blink/renderer/platform/wtf/casting.h"

namespace blink {

class CSSValue;
class CSSImageGeneratorValue;
class Document;
class ImageResourceObserver;

// This class represents a generated <image> such as a gradient or paint(...)
// function. Use only for images that have no intrinsic dimensions.
class CORE_EXPORT StyleGeneratedImage final : public StyleImage {
 public:
  using ContainerSizes = CSSToLengthConversionData::ContainerSizes;

  explicit StyleGeneratedImage(const CSSImageGeneratorValue&,
                               const ContainerSizes&);

  WrappedImagePtr Data() const override { return image_generator_value_.Get(); }

  CSSValue* CssValue() const override;
  CSSValue* ComputedCSSValue(const ComputedStyle&,
                             bool allow_visited_style,
                             CSSValuePhase value_phase) const override;

  bool IsCorsSameOrigin() const override;

  NaturalSizingInfo GetNaturalSizingInfo(
      float multiplier,
      RespectImageOrientationEnum) const override;
  gfx::SizeF ImageSize(float multiplier,
                       const gfx::SizeF& default_object_size,
                       RespectImageOrientationEnum) const override;
  bool HasIntrinsicSize() const override { return false; }
  void AddClient(ImageResourceObserver*) override;
  void RemoveClient(ImageResourceObserver*) override;
  // The |target_size| is the desired image size
  scoped_refptr<Image> GetImage(const ImageResourceObserver&,
                                const Node&,
                                const ComputedStyle&,
                                const gfx::SizeF& target_size) const override;
  bool KnownToBeOpaque(const Document&, const ComputedStyle&) const override;

  bool IsUsingCustomProperty(const AtomicString& custom_property_name,
                             const Document&) const;
  bool IsUsingCurrentColor() const;

  bool DependsOnCurrentColor() const override { return IsUsingCurrentColor(); }

  void Trace(Visitor*) const override;

 private:
  bool IsEqual(const StyleImage&) const override;

  Member<CSSImageGeneratorValue> image_generator_value_;
  ContainerSizes container_sizes_;
};

template <>
struct DowncastTraits<StyleGeneratedImage> {
  static bool AllowFrom(const StyleImage& styleImage) {
    return styleImage.IsGeneratedImage();
  }
};

}  // namespace blink
#endif  // THIRD_PARTY_BLINK_RENDERER_CORE_STYLE_STYLE_GENERATED_IMAGE_H_