chromium/third_party/blink/renderer/core/css/css_gradient_value.h

/*
 * Copyright (C) 2008 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_CSS_CSS_GRADIENT_VALUE_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_CSS_CSS_GRADIENT_VALUE_H_

#include "base/memory/scoped_refptr.h"
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/css/css_color.h"
#include "third_party/blink/renderer/core/css/css_identifier_value.h"
#include "third_party/blink/renderer/core/css/css_image_generator_value.h"
#include "third_party/blink/renderer/core/css/css_primitive_value.h"
#include "third_party/blink/renderer/platform/wtf/casting.h"
#include "third_party/blink/renderer/platform/wtf/vector.h"

namespace blink {

class Color;
class Gradient;
class Document;

namespace cssvalue {

enum CSSGradientType { … };
enum CSSGradientRepeat { … };

// This struct is stack allocated and allocated as part of vectors.
// When allocated on the stack its members are found by conservative
// stack scanning. When allocated as part of Vectors in heap-allocated
// objects its members are visited via the containing object's
// (CSSGradientValue) traceAfterDispatch method.
//
// http://www.w3.org/TR/css3-images/#color-stop-syntax
struct CSSGradientColorStop { … };

}  // namespace cssvalue
}  // namespace blink

// We have to declare the VectorTraits specialization before CSSGradientValue
// declares its inline capacity vector below.
WTF_ALLOW_MOVE_AND_INIT_WITH_MEM_FUNCTIONS(…)

namespace blink {
namespace cssvalue {

class CSSGradientValue : public CSSImageGeneratorValue { … };

class CSSLinearGradientValue final : public CSSGradientValue { … };

class CORE_EXPORT CSSRadialGradientValue final : public CSSGradientValue { … };

class CSSConicGradientValue final : public CSSGradientValue { … };

// cross-fade() supports interpolating between not only images,
// but also colors. This is a proxy class that takes in a ColorValue
// and behaves otherwise like a one-color gradient, since gradients
// have all the machinery needed to resolve colors and convert them
// into images.
class CSSConstantGradientValue final : public CSSGradientValue { … };

}  // namespace cssvalue

template <>
struct DowncastTraits<cssvalue::CSSGradientValue> { … };

template <>
struct DowncastTraits<cssvalue::CSSLinearGradientValue> { … };

template <>
struct DowncastTraits<cssvalue::CSSRadialGradientValue> { … };

template <>
struct DowncastTraits<cssvalue::CSSConicGradientValue> { … };

template <>
struct DowncastTraits<cssvalue::CSSConstantGradientValue> { … };

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_CORE_CSS_CSS_GRADIENT_VALUE_H_