/*

 * 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 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 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. 

 */

#include "config.h"

#include "WebKitCSSMatrix.h"

#include "CSSParser.h"

#include "CSSStyleSelector.h"

#include "CSSMutableStyleDeclaration.h"

#include "CSSPropertyNames.h"

#include "ExceptionCode.h"

#include "RenderStyle.h"

#include <wtf/MathExtras.h>

namespace WebCore {

WebKitCSSMatrix::WebKitCSSMatrix()

    : StyleBase(0)

{

}

WebKitCSSMatrix::WebKitCSSMatrix(const WebKitCSSMatrix& m)

    : StyleBase(0)

    , m_matrix(m.m_matrix)

{

}

WebKitCSSMatrix::WebKitCSSMatrix(const TransformationMatrix& m)

    : StyleBase(0)

    , m_matrix(m)

{

}

WebKitCSSMatrix::WebKitCSSMatrix(const String& s, ExceptionCode& ec) 

    : StyleBase(0)

{

    setMatrixValue(s, ec);

}

WebKitCSSMatrix::~WebKitCSSMatrix()

{

}

void WebKitCSSMatrix::setMatrixValue(const String& string, ExceptionCode& ec)

{

    CSSParser p(useStrictParsing());

    RefPtr<CSSMutableStyleDeclaration> styleDeclaration = CSSMutableStyleDeclaration::create();

    if (p.parseValue(styleDeclaration.get(), CSSPropertyWebkitTransform, string, true)) {

        // Convert to TransformOperations. This can fail if a property 

        // requires style (i.e., param uses 'ems' or 'exs')

        PassRefPtr<CSSValue> val =  styleDeclaration->getPropertyCSSValue(CSSPropertyWebkitTransform);

        TransformOperations operations;

        if (!CSSStyleSelector::createTransformOperations(val.get(), 0, 0, operations)) {

            ec = SYNTAX_ERR;

            return;

        }

        // Convert transform operations to a TransformationMatrix. This can fail

        // if a param has a percentage ('%')

        TransformationMatrix t;

        for (unsigned i = 0; i < operations.operations().size(); ++i) {

            if (operations.operations()[i].get()->apply(t, IntSize(0, 0))) {

                ec = SYNTAX_ERR;

                return;

            }

        }

        // set the matrix

        m_matrix = t;

    } else if (!string.isEmpty()) // There is something there but parsing failed

        ec = SYNTAX_ERR;

}

// Perform a concatenation of the matrices (this * secondMatrix)

PassRefPtr<WebKitCSSMatrix> WebKitCSSMatrix::multiply(WebKitCSSMatrix* secondMatrix) const

{

    if (!secondMatrix)

        return 0;

    TransformationMatrix tmp(secondMatrix->m_matrix);

    tmp.multiply(m_matrix);

    return WebKitCSSMatrix::create(tmp);

}

PassRefPtr<WebKitCSSMatrix> WebKitCSSMatrix::inverse(ExceptionCode& ec) const

{

    if (!m_matrix.isInvertible()) {

        ec = NOT_SUPPORTED_ERR;

        return 0;

    }

    return WebKitCSSMatrix::create(m_matrix.inverse());

}

PassRefPtr<WebKitCSSMatrix> WebKitCSSMatrix::translate(double x, double y, double z) const

{

    if (isnan(x))

        x = 0;

    if (isnan(y))

        y = 0;

    if (isnan(z))

        z = 0;

    return WebKitCSSMatrix::create(TransformationMatrix(m_matrix).translate3d(x, y, z));

}

PassRefPtr<WebKitCSSMatrix> WebKitCSSMatrix::scale(double scaleX, double scaleY, double scaleZ) const

{

    if (isnan(scaleX))

        scaleX = 1;

    if (isnan(scaleY))

        scaleY = scaleX;

    if (isnan(scaleZ))

        scaleZ = 1;

    return WebKitCSSMatrix::create(TransformationMatrix(m_matrix).scale3d(scaleX, scaleY, scaleZ));

}

PassRefPtr<WebKitCSSMatrix> WebKitCSSMatrix::rotate(double rotX, double rotY, double rotZ) const

{

    if (isnan(rotX))

        rotX = 0;

    if (isnan(rotY) && isnan(rotZ)) {

        rotZ = rotX;

        rotX = 0;

        rotY = 0;

    }

    if (isnan(rotY))

        rotY = 0;

    if (isnan(rotZ))

        rotZ = 0;

    return WebKitCSSMatrix::create(TransformationMatrix(m_matrix).rotate3d(rotX, rotY, rotZ));

}

PassRefPtr<WebKitCSSMatrix> WebKitCSSMatrix::rotateAxisAngle(double x, double y, double z, double angle) const

{

    if (isnan(x))

        x = 0;

    if (isnan(y))

        y = 0;

    if (isnan(z))

        z = 0;

    if (isnan(angle))

        angle = 0;

    if (x == 0 && y == 0 && z == 0)

        z = 1;

    return WebKitCSSMatrix::create(TransformationMatrix(m_matrix).rotate3d(x, y, z, angle));

}

String WebKitCSSMatrix::toString() const

{

    // FIXME - Need to ensure valid CSS floating point values (https://bugs.webkit.org/show_bug.cgi?id=20674)

    if (m_matrix.isAffine())

        return String::format("matrix(%f, %f, %f, %f, %f, %f)",

                                m_matrix.a(), m_matrix.b(), m_matrix.c(), m_matrix.d(), m_matrix.e(), m_matrix.f());

    return String::format("matrix3d(%f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f)",

                            m_matrix.m11(), m_matrix.m12(), m_matrix.m13(), m_matrix.m14(),

                            m_matrix.m21(), m_matrix.m22(), m_matrix.m23(), m_matrix.m24(),

                            m_matrix.m31(), m_matrix.m32(), m_matrix.m33(), m_matrix.m34(),

                            m_matrix.m41(), m_matrix.m42(), m_matrix.m43(), m_matrix.m44());

}

} // namespace WebCore