third_party/WebKit/Source/core/svg/SVGMatrixTearOff.cpp

/*
 * Copyright (C) 2014 Google Inc. All rights reserved.
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#include "core/svg/SVGMatrixTearOff.h"

#include "bindings/core/v8/ExceptionState.h"
#include "core/dom/ExceptionCode.h"
#include "core/svg/SVGElement.h"
#include "core/svg/SVGTransformTearOff.h"

namespace blink {

SVGMatrixTearOff::SVGMatrixTearOff(const AffineTransform& staticValue)
    : m_staticValue(staticValue)
    , m_contextTransform(nullptr)
{
}

SVGMatrixTearOff::SVGMatrixTearOff(SVGTransformTearOff* transform)
    : m_contextTransform(transform)
{
    ASSERT(transform);
}

DEFINE_TRACE(SVGMatrixTearOff)
{
    visitor->trace(m_contextTransform);
}

const AffineTransform& SVGMatrixTearOff::value() const
{
    return m_contextTransform ? m_contextTransform->target()->matrix() : m_staticValue;
}

AffineTransform* SVGMatrixTearOff::mutableValue()
{
    return m_contextTransform ? m_contextTransform->target()->mutableMatrix() : &m_staticValue;
}

void SVGMatrixTearOff::commitChange()
{
    if (!m_contextTransform)
        return;

    m_contextTransform->target()->onMatrixChange();
    m_contextTransform->commitChange();
}

#define DEFINE_SETTER(ATTRIBUTE) \
    void SVGMatrixTearOff::set##ATTRIBUTE(double f, ExceptionState& exceptionState) \
    { \
        if (m_contextTransform && m_contextTransform->isImmutable()) { \
            SVGPropertyTearOffBase::throwReadOnly(exceptionState); \
            return; \
        } \
        mutableValue()->set##ATTRIBUTE(f); \
        commitChange(); \
    }

DEFINE_SETTER(A);
DEFINE_SETTER(B);
DEFINE_SETTER(C);
DEFINE_SETTER(D);
DEFINE_SETTER(E);
DEFINE_SETTER(F);

#undef DEFINE_SETTER

SVGMatrixTearOff* SVGMatrixTearOff::translate(double tx, double ty)
{
    SVGMatrixTearOff* matrix = create(value());
    matrix->mutableValue()->translate(tx, ty);
    return matrix;
}

SVGMatrixTearOff* SVGMatrixTearOff::scale(double s)
{
    SVGMatrixTearOff* matrix = create(value());
    matrix->mutableValue()->scale(s, s);
    return matrix;
}

SVGMatrixTearOff* SVGMatrixTearOff::scaleNonUniform(double sx, double sy)
{
    SVGMatrixTearOff* matrix = create(value());
    matrix->mutableValue()->scale(sx, sy);
    return matrix;
}

SVGMatrixTearOff* SVGMatrixTearOff::rotate(double d)
{
    SVGMatrixTearOff* matrix = create(value());
    matrix->mutableValue()->rotate(d);
    return matrix;
}

SVGMatrixTearOff* SVGMatrixTearOff::flipX()
{
    SVGMatrixTearOff* matrix = create(value());
    matrix->mutableValue()->flipX();
    return matrix;
}

SVGMatrixTearOff* SVGMatrixTearOff::flipY()
{
    SVGMatrixTearOff* matrix = create(value());
    matrix->mutableValue()->flipY();
    return matrix;
}

SVGMatrixTearOff* SVGMatrixTearOff::skewX(double angle)
{
    SVGMatrixTearOff* matrix = create(value());
    matrix->mutableValue()->skewX(angle);
    return matrix;
}

SVGMatrixTearOff* SVGMatrixTearOff::skewY(double angle)
{
    SVGMatrixTearOff* matrix = create(value());
    matrix->mutableValue()->skewY(angle);
    return matrix;
}

SVGMatrixTearOff* SVGMatrixTearOff::multiply(SVGMatrixTearOff* other)
{
    SVGMatrixTearOff* matrix = create(value());
    *matrix->mutableValue() *= other->value();
    return matrix;
}

SVGMatrixTearOff* SVGMatrixTearOff::inverse(ExceptionState& exceptionState)
{
    if (!value().isInvertible()) {
        exceptionState.throwDOMException(InvalidStateError, "The matrix is not invertible.");
        return nullptr;
    }
    return create(value().inverse());
}

SVGMatrixTearOff* SVGMatrixTearOff::rotateFromVector(double x, double y, ExceptionState& exceptionState)
{
    if (!x || !y) {
        exceptionState.throwDOMException(InvalidAccessError, "Arguments cannot be zero.");
        return nullptr;
    }
    AffineTransform copy = value();
    copy.rotateFromVector(x, y);
    return create(copy);
}

DEFINE_TRACE_WRAPPERS(SVGMatrixTearOff)
{
    visitor->traceWrappers(m_contextTransform);
}

} // namespace blink