/*

 * Copyright (C) 2003-6 Apple Computer, 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 Color_h

#define Color_h

#include <wtf/Platform.h>

#if PLATFORM(CG)

typedef struct CGColor* CGColorRef;

#endif

#if PLATFORM(QT)

class QColor;

#endif

namespace WebCore {

class String;

class Color;

typedef unsigned RGBA32;        // RGBA quadruplet

RGBA32 makeRGB(int r, int g, int b);

RGBA32 makeRGBA(int r, int g, int b, int a);

RGBA32 makeRGBAFromHSLA(double h, double s, double l, double a);

int differenceSquared(const Color&, const Color&);

class Color {

public:

    Color() : m_color(0), m_valid(false) { }

    Color(RGBA32 col) : m_color(col), m_valid(true) { }

    Color(int r, int g, int b) : m_color(makeRGB(r, g, b)), m_valid(true) { }

    Color(int r, int g, int b, int a) : m_color(makeRGBA(r, g, b, a)), m_valid(true) { }

    explicit Color(const String&);

    explicit Color(const char*);

    String name() const;

    void setNamedColor(const String&);

    bool isValid() const { return m_valid; }

    bool hasAlpha() const { return alpha() < 255; }

    int red() const { return (m_color >> 16) & 0xFF; }

    int green() const { return (m_color >> 8) & 0xFF; }

    int blue() const { return m_color & 0xFF; }

    int alpha() const { return (m_color >> 24) & 0xFF; }

    RGBA32 rgb() const { return m_color; } // Preserve the alpha.

    void setRGB(int r, int g, int b) { m_color = makeRGB(r, g, b); m_valid = true; }

    void setRGB(RGBA32 rgb) { m_color = rgb; m_valid = true; }

    void getRGBA(float& r, float& g, float& b, float& a) const;

    void getRGBA(double& r, double& g, double& b, double& a) const;

    Color light() const;

    Color dark() const;

    Color blend(const Color&) const;

    Color blendWithWhite() const;

#if PLATFORM(QT)

    Color(const QColor&);

    operator QColor() const;

#endif

    static bool parseHexColor(const String& name, RGBA32& rgb);

    static const RGBA32 black = 0xFF000000;

    static const RGBA32 white = 0xFFFFFFFF;

    static const RGBA32 darkGray = 0xFF808080;

    static const RGBA32 gray = 0xFFA0A0A0;

    static const RGBA32 lightGray = 0xFFC0C0C0;

    static const RGBA32 transparent = 0x00000000;

private:

    RGBA32 m_color;

    bool m_valid : 1;

};

inline bool operator==(const Color& a, const Color& b)

{

    return a.rgb() == b.rgb() && a.isValid() == b.isValid();

}

inline bool operator!=(const Color& a, const Color& b)

{

    return !(a == b);

}

Color focusRingColor();

void setFocusRingColorChangeFunction(void (*)());

#if PLATFORM(CG)

CGColorRef cgColor(const Color&);

#endif

} // namespace WebCore

#endif // Color_h