/* -*- 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/SVGCircleElement.h"

#include "mozilla/gfx/2D.h"

#include "nsGkAtoms.h"

#include "mozilla/dom/SVGCircleElementBinding.h"

#include "mozilla/dom/SVGLengthBinding.h"

NS_IMPL_NS_NEW_NAMESPACED_SVG_ELEMENT(Circle)

using namespace mozilla::gfx;

namespace mozilla {

namespace dom {

JSObject*

SVGCircleElement::WrapNode(JSContext *aCx, JS::Handle<JSObject*> aGivenProto)

{

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

}

nsSVGElement::LengthInfo SVGCircleElement::sLengthInfo[3] =

{

  { &nsGkAtoms::cx, 0, SVGLength_Binding::SVG_LENGTHTYPE_NUMBER, SVGContentUtils::X },

  { &nsGkAtoms::cy, 0, SVGLength_Binding::SVG_LENGTHTYPE_NUMBER, SVGContentUtils::Y },

  { &nsGkAtoms::r, 0, SVGLength_Binding::SVG_LENGTHTYPE_NUMBER, SVGContentUtils::XY }

};

//----------------------------------------------------------------------

// Implementation

SVGCircleElement::SVGCircleElement(already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)

  : SVGCircleElementBase(std::move(aNodeInfo))

{

}

//----------------------------------------------------------------------

// nsINode methods

NS_IMPL_ELEMENT_CLONE_WITH_INIT(SVGCircleElement)

//----------------------------------------------------------------------

already_AddRefed<SVGAnimatedLength>

SVGCircleElement::Cx()

{

  return mLengthAttributes[ATTR_CX].ToDOMAnimatedLength(this);

}

already_AddRefed<SVGAnimatedLength>

SVGCircleElement::Cy()

{

  return mLengthAttributes[ATTR_CY].ToDOMAnimatedLength(this);

}

already_AddRefed<SVGAnimatedLength>

SVGCircleElement::R()

{

  return mLengthAttributes[ATTR_R].ToDOMAnimatedLength(this);

}

//----------------------------------------------------------------------

// nsSVGElement methods

/* virtual */ bool

SVGCircleElement::HasValidDimensions() const

{

  return mLengthAttributes[ATTR_R].IsExplicitlySet() &&

         mLengthAttributes[ATTR_R].GetAnimValInSpecifiedUnits() > 0;

}

nsSVGElement::LengthAttributesInfo

SVGCircleElement::GetLengthInfo()

{

  return LengthAttributesInfo(mLengthAttributes, sLengthInfo,

                              ArrayLength(sLengthInfo));

}

//----------------------------------------------------------------------

// SVGGeometryElement methods

bool

SVGCircleElement::GetGeometryBounds(Rect* aBounds,

                                    const StrokeOptions& aStrokeOptions,

                                    const Matrix& aToBoundsSpace,

                                    const Matrix* aToNonScalingStrokeSpace)

{

  float x, y, r;

  GetAnimatedLengthValues(&x, &y, &r, nullptr);

  if (r <= 0.f) {

    // Rendering of the element is disabled

    *aBounds = Rect(aToBoundsSpace.TransformPoint(Point(x, y)), Size());

    return true;

  }

  if (aToBoundsSpace.IsRectilinear()) {

    // Optimize the case where we can treat the circle as a rectangle and

    // still get tight bounds.

    if (aStrokeOptions.mLineWidth > 0.f) {

      if (aToNonScalingStrokeSpace) {

        if (aToNonScalingStrokeSpace->IsRectilinear()) {

          MOZ_ASSERT(!aToNonScalingStrokeSpace->IsSingular());

          Rect userBounds(x - r, y - r, 2 * r, 2 * r);

          SVGContentUtils::RectilinearGetStrokeBounds(

            userBounds, aToBoundsSpace, *aToNonScalingStrokeSpace,

            aStrokeOptions.mLineWidth, aBounds);

          return true;

        }

        return false;

      }

      r += aStrokeOptions.mLineWidth / 2.f;

    }

    Rect rect(x - r, y - r, 2 * r, 2 * r);

    *aBounds = aToBoundsSpace.TransformBounds(rect);

    return true;

  }

  return false;

}

already_AddRefed<Path>

SVGCircleElement::BuildPath(PathBuilder* aBuilder)

{

  float x, y, r;

  GetAnimatedLengthValues(&x, &y, &r, nullptr);

  if (r <= 0.0f) {

    return nullptr;

  }

  aBuilder->Arc(Point(x, y), r, 0, Float(2*M_PI));

  return aBuilder->Finish();

}

} // namespace dom

} // namespace mozilla