/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=2 et sw=2 tw=80: */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "mozilla/dom/SVGMatrix.h"

#include "nsError.h"

#include <math.h>

#include "mozilla/dom/SVGMatrixBinding.h"

#include "mozilla/FloatingPoint.h"

const double radPerDegree = 2.0 * M_PI / 360.0;

namespace mozilla {

namespace dom {

NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(SVGMatrix, mTransform)

NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(SVGMatrix, AddRef)

NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(SVGMatrix, Release)

SVGTransform*

SVGMatrix::GetParentObject() const

{

  return mTransform;

}

JSObject*

SVGMatrix::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)

{

  return SVGMatrix_Binding::Wrap(aCx, this, aGivenProto);

}

void

SVGMatrix::SetA(float aA, ErrorResult& rv)

{

  if (IsAnimVal()) {

    rv.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR);

    return;

  }

  gfxMatrix mx = GetMatrix();

  mx._11 = aA;

  SetMatrix(mx);

}

void

SVGMatrix::SetB(float aB, ErrorResult& rv)

{

  if (IsAnimVal()) {

    rv.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR);

    return;

  }

  gfxMatrix mx = GetMatrix();

  mx._12 = aB;

  SetMatrix(mx);

}

void

SVGMatrix::SetC(float aC, ErrorResult& rv)

{

  if (IsAnimVal()) {

    rv.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR);

    return;

  }

  gfxMatrix mx = GetMatrix();

  mx._21 = aC;

  SetMatrix(mx);

}

void

SVGMatrix::SetD(float aD, ErrorResult& rv)

{

  if (IsAnimVal()) {

    rv.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR);

    return;

  }

  gfxMatrix mx = GetMatrix();

  mx._22 = aD;

  SetMatrix(mx);

}

void

SVGMatrix::SetE(float aE, ErrorResult& rv)

{

  if (IsAnimVal()) {

    rv.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR);

    return;

  }

  gfxMatrix mx = GetMatrix();

  mx._31 = aE;

  SetMatrix(mx);

}

void

SVGMatrix::SetF(float aF, ErrorResult& rv)

{

  if (IsAnimVal()) {

    rv.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR);

    return;

  }

  gfxMatrix mx = GetMatrix();

  mx._32 = aF;

  SetMatrix(mx);

}

already_AddRefed<SVGMatrix>

SVGMatrix::Multiply(SVGMatrix& aMatrix)

{

  RefPtr<SVGMatrix> matrix = new SVGMatrix(aMatrix.GetMatrix() * GetMatrix());

  return matrix.forget();

}

already_AddRefed<SVGMatrix>

SVGMatrix::Inverse(ErrorResult& rv)

{

  gfxMatrix mat = GetMatrix();

  if (!mat.Invert()) {

    rv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);

    return nullptr;

  }

  RefPtr<SVGMatrix> matrix = new SVGMatrix(mat);

  return matrix.forget();

}

already_AddRefed<SVGMatrix>

SVGMatrix::Translate(float x, float y)

{

  RefPtr<SVGMatrix> matrix =

    new SVGMatrix(gfxMatrix(GetMatrix()).PreTranslate(gfxPoint(x, y)));

  return matrix.forget();

}

already_AddRefed<SVGMatrix>

SVGMatrix::Scale(float scaleFactor)

{

  return ScaleNonUniform(scaleFactor, scaleFactor);

}

already_AddRefed<SVGMatrix>

SVGMatrix::ScaleNonUniform(float scaleFactorX,

                           float scaleFactorY)

{

  RefPtr<SVGMatrix> matrix =

    new SVGMatrix(gfxMatrix(GetMatrix()).PreScale(scaleFactorX, scaleFactorY));

  return matrix.forget();

}

already_AddRefed<SVGMatrix>

SVGMatrix::Rotate(float angle)

{

  RefPtr<SVGMatrix> matrix =

    new SVGMatrix(gfxMatrix(GetMatrix()).PreRotate(angle*radPerDegree));

  return matrix.forget();

}

already_AddRefed<SVGMatrix>

SVGMatrix::RotateFromVector(float x, float y, ErrorResult& rv)

{

  if (x == 0.0 || y == 0.0) {

    rv.Throw(NS_ERROR_DOM_INVALID_ACCESS_ERR);

    return nullptr;

  }

  RefPtr<SVGMatrix> matrix =

    new SVGMatrix(gfxMatrix(GetMatrix()).PreRotate(atan2(y, x)));

  return matrix.forget();

}

already_AddRefed<SVGMatrix>

SVGMatrix::FlipX()

{

  const gfxMatrix& mx = GetMatrix();

  RefPtr<SVGMatrix> matrix =

    new SVGMatrix(gfxMatrix(-mx._11, -mx._12, mx._21, mx._22, mx._31, mx._32));

  return matrix.forget();

}

already_AddRefed<SVGMatrix>

SVGMatrix::FlipY()

{

  const gfxMatrix& mx = GetMatrix();

  RefPtr<SVGMatrix> matrix =

    new SVGMatrix(gfxMatrix(mx._11, mx._12, -mx._21, -mx._22, mx._31, mx._32));

  return matrix.forget();

}

already_AddRefed<SVGMatrix>

SVGMatrix::SkewX(float angle, ErrorResult& rv)

{

  double ta = tan( angle*radPerDegree );

  if (!IsFinite(ta)) {

    rv.Throw(NS_ERROR_DOM_INVALID_ACCESS_ERR);

    return nullptr;

  }

  const gfxMatrix& mx = GetMatrix();

  gfxMatrix skewMx(mx._11, mx._12,

                   (float) (mx._21 + mx._11*ta), (float) (mx._22 + mx._12*ta),

                   mx._31, mx._32);

  RefPtr<SVGMatrix> matrix = new SVGMatrix(skewMx);

  return matrix.forget();

}

already_AddRefed<SVGMatrix>

SVGMatrix::SkewY(float angle, ErrorResult& rv)

{

  double ta = tan( angle*radPerDegree );

  if (!IsFinite(ta)) {

    rv.Throw(NS_ERROR_DOM_INVALID_ACCESS_ERR);

    return nullptr;

  }

  const gfxMatrix& mx = GetMatrix();

  gfxMatrix skewMx((float) (mx._11 + mx._21*ta), (float) (mx._12 + mx._22*ta),

                   mx._21, mx._22,

                   mx._31, mx._32);

  RefPtr<SVGMatrix> matrix = new SVGMatrix(skewMx);

  return matrix.forget();

}

} // namespace dom

} // namespace mozilla