/*

    Copyright (C) 2004, 2005 Nikolas Zimmermann <wildfox@kde.org>

                  2004, 2005 Rob Buis <buis@kde.org>

    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.

*/

#include "config.h"

#if ENABLE(SVG)

#include "FloatPoint.h"

#include "FloatSize.h"

#include "SVGAngle.h"

#include "SVGSVGElement.h"

#include "SVGTransform.h"

#include <math.h>

using namespace WebCore;

SVGTransform::SVGTransform()

    : m_type(SVG_TRANSFORM_UNKNOWN)

    , m_angle(0)

{

}

SVGTransform::SVGTransform(SVGTransformType type)

    : m_type(type)

    , m_angle(0)

    , m_center(FloatPoint())

    , m_matrix(AffineTransform())

{

}

SVGTransform::SVGTransform(const AffineTransform& matrix)

    : m_type(SVG_TRANSFORM_MATRIX)

    , m_angle(0)

    , m_matrix(matrix)

{

}

SVGTransform::~SVGTransform()

{

}

bool SVGTransform::isValid()

{

    return (m_type != SVG_TRANSFORM_UNKNOWN);

}

SVGTransform::SVGTransformType SVGTransform::type() const

{

    return m_type;

}

AffineTransform SVGTransform::matrix() const

{

    return m_matrix;

}

float SVGTransform::angle() const

{

    return m_angle;

}

FloatPoint SVGTransform::rotationCenter() const

{

    return m_center;

}

void SVGTransform::setMatrix(AffineTransform matrix)

{

    m_type = SVG_TRANSFORM_MATRIX;

    m_angle = 0;

    m_matrix = matrix;

}

void SVGTransform::setTranslate(float tx, float ty)

{

    m_type = SVG_TRANSFORM_TRANSLATE;

    m_angle = 0;

    m_matrix.makeIdentity();

    m_matrix.translate(tx, ty);

}

FloatPoint SVGTransform::translate() const

{

    return FloatPoint::narrowPrecision(m_matrix.e(), m_matrix.f());

}

void SVGTransform::setScale(float sx, float sy)

{

    m_type = SVG_TRANSFORM_SCALE;

    m_angle = 0;

    m_center = FloatPoint();

    m_matrix.makeIdentity();

    m_matrix.scaleNonUniform(sx, sy);

}

FloatSize SVGTransform::scale() const

{

    return FloatSize::narrowPrecision(m_matrix.a(), m_matrix.d());

}

void SVGTransform::setRotate(float angle, float cx, float cy)

{

    m_type = SVG_TRANSFORM_ROTATE;

    m_angle = angle;

    m_center = FloatPoint(cx, cy);

    // TODO: toString() implementation, which can show cx, cy (need to be stored?)

    m_matrix.makeIdentity();

    m_matrix.translate(cx, cy);

    m_matrix.rotate(angle);

    m_matrix.translate(-cx, -cy);

}

void SVGTransform::setSkewX(float angle)

{

    m_type = SVG_TRANSFORM_SKEWX;

    m_angle = angle;

    m_matrix.makeIdentity();

    m_matrix.skewX(angle);

}

void SVGTransform::setSkewY(float angle)

{

    m_type = SVG_TRANSFORM_SKEWY;

    m_angle = angle;

    m_matrix.makeIdentity();

    m_matrix.skewY(angle);

}

#endif // ENABLE(SVG)