/*
 * Copyright (C) 2006, 2008 Apple Inc. All rights reserved.
 * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
 *
 * 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 CanvasStyle_h
#define CanvasStyle_h

#include "platform/graphics/Color.h"
#include "platform/heap/Handle.h"
#include "wtf/Assertions.h"
#include "wtf/text/WTFString.h"

class SkPaint;

namespace blink {

class CanvasGradient;
class CanvasPattern;
class HTMLCanvasElement;

class CanvasStyle final : public GarbageCollected<CanvasStyle> {
 public:
  static CanvasStyle* createFromRGBA(RGBA32 rgba) {
    return new CanvasStyle(rgba);
  }
  static CanvasStyle* createFromGradient(CanvasGradient*);
  static CanvasStyle* createFromPattern(CanvasPattern*);

  String color() const {
    ASSERT(m_type == ColorRGBA);
    return Color(m_rgba).serialized();
  }
  CanvasGradient* getCanvasGradient() const { return m_gradient.get(); }
  CanvasPattern* getCanvasPattern() const { return m_pattern; }

  void applyToPaint(SkPaint&) const;
  RGBA32 paintColor() const;

  bool isEquivalentRGBA(RGBA32 rgba) const {
    return m_type == ColorRGBA && m_rgba == rgba;
  }

  DECLARE_TRACE();

 private:
  enum Type { ColorRGBA, Gradient, ImagePattern };

  CanvasStyle(RGBA32);
  CanvasStyle(CanvasGradient*);
  CanvasStyle(CanvasPattern*);

  Type m_type;
  RGBA32 m_rgba;

  Member<CanvasGradient> m_gradient;
  Member<CanvasPattern> m_pattern;
};

bool parseColorOrCurrentColor(Color& parsedColor,
                              const String& colorString,
                              HTMLCanvasElement*);

}  // namespace blink

#endif
