WebCore/bindings/js/JSSVGMatrixCustom.cpp

/*
 * Copyright (C) 2006, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
 * Copyright (C) 2009 Jeff Schiller <codedread@gmail.com>
 *
 * 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 "JSSVGMatrix.h"

#include "AffineTransform.h"
#include "SVGException.h"
#include <runtime/Error.h>

using namespace JSC;

namespace WebCore {

JSValue JSSVGMatrix::multiply(ExecState* exec)
{
    if (exec->argumentCount() < 1)
        return throwError(exec, createSyntaxError(exec, "Not enough arguments"));

    if (!exec->argument(0).inherits(&JSSVGMatrix::s_info))
        return throwError(exec, createTypeError(exec, "secondMatrix argument was not a SVGMatrix"));

    JSSVGMatrix* matrixObj = static_cast<JSSVGMatrix*>(asObject(exec->argument(0)));

    AffineTransform m1(*impl());
    AffineTransform m2(*(matrixObj->impl()));

    SVGElement* context = JSSVGContextCache::svgContextForDOMObject(this);
    return toJS(exec, globalObject(), JSSVGStaticPODTypeWrapper<AffineTransform>::create(m1.multLeft(m2)).get(), context);
}

JSValue JSSVGMatrix::inverse(ExecState* exec)
{
    AffineTransform imp(*impl());

    SVGElement* context = JSSVGContextCache::svgContextForDOMObject(this);
    JSValue result = toJS(exec, globalObject(), JSSVGStaticPODTypeWrapper<AffineTransform>::create(imp.inverse()).get(), context);

    if (!imp.isInvertible())
        setDOMException(exec, SVGException::SVG_MATRIX_NOT_INVERTABLE);

    return result;
}

JSValue JSSVGMatrix::rotateFromVector(ExecState* exec)
{
    AffineTransform imp(*impl());
 
    float x = exec->argument(0).toFloat(exec);
    float y = exec->argument(1).toFloat(exec);

    SVGElement* context = JSSVGContextCache::svgContextForDOMObject(this);
    JSValue result = toJS(exec, globalObject(), JSSVGStaticPODTypeWrapper<AffineTransform>::create(imp.rotateFromVector(x, y)).get(), context);

    if (x == 0.0 || y == 0.0)
        setDOMException(exec, SVGException::SVG_INVALID_VALUE_ERR);

    return result;
}

}

#endif // ENABLE(SVG)