/* -*- 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 "nsError.h"

#include "nsSVGAttrTearoffTable.h"

#include "nsSVGEnum.h"

#include "nsAtom.h"

#include "nsSVGElement.h"

#include "nsSMILValue.h"

#include "SMILEnumType.h"

using namespace mozilla;

using namespace mozilla::dom;

static nsSVGAttrTearoffTable<nsSVGEnum, nsSVGEnum::DOMAnimatedEnum>

  sSVGAnimatedEnumTearoffTable;

nsSVGEnumMapping *

nsSVGEnum::GetMapping(nsSVGElement *aSVGElement)

{

  nsSVGElement::EnumAttributesInfo info = aSVGElement->GetEnumInfo();

  NS_ASSERTION(info.mEnumCount > 0 && mAttrEnum < info.mEnumCount,

               "mapping request for a non-attrib enum");

  return info.mEnumInfo[mAttrEnum].mMapping;

}

nsresult

nsSVGEnum::SetBaseValueAtom(const nsAtom* aValue, nsSVGElement *aSVGElement)

{

  nsSVGEnumMapping *mapping = GetMapping(aSVGElement);

  while (mapping && mapping->mKey) {

    if (aValue == *(mapping->mKey)) {

      mIsBaseSet = true;

      if (mBaseVal != mapping->mVal) {

        mBaseVal = mapping->mVal;

        if (!mIsAnimated) {

          mAnimVal = mBaseVal;

        }

        else {

          aSVGElement->AnimationNeedsResample();

        }

        // We don't need to call DidChange* here - we're only called by

        // nsSVGElement::ParseAttribute under Element::SetAttr,

        // which takes care of notifying.

      }

      return NS_OK;

    }

    mapping++;

  }

  return NS_ERROR_DOM_TYPE_ERR;

}

nsAtom*

nsSVGEnum::GetBaseValueAtom(nsSVGElement *aSVGElement)

{

  nsSVGEnumMapping *mapping = GetMapping(aSVGElement);

  while (mapping && mapping->mKey) {

    if (mBaseVal == mapping->mVal) {

      return *mapping->mKey;

    }

    mapping++;

  }

  NS_ERROR("unknown enumeration value");

  return nsGkAtoms::_empty;

}

nsresult

nsSVGEnum::SetBaseValue(uint16_t aValue,

                        nsSVGElement *aSVGElement)

{

  nsSVGEnumMapping *mapping = GetMapping(aSVGElement);

  while (mapping && mapping->mKey) {

    if (mapping->mVal == aValue) {

      mIsBaseSet = true;

      if (mBaseVal != uint8_t(aValue)) {

        mBaseVal = uint8_t(aValue);

        if (!mIsAnimated) {

          mAnimVal = mBaseVal;

        }

        else {

          aSVGElement->AnimationNeedsResample();

        }

        aSVGElement->DidChangeEnum(mAttrEnum);

      }

      return NS_OK;

    }

    mapping++;

  }

  return NS_ERROR_DOM_TYPE_ERR;

}

void

nsSVGEnum::SetAnimValue(uint16_t aValue, nsSVGElement *aSVGElement)

{

  if (mIsAnimated && aValue == mAnimVal) {

    return;

  }

  mAnimVal = aValue;

  mIsAnimated = true;

  aSVGElement->DidAnimateEnum(mAttrEnum);

}

already_AddRefed<SVGAnimatedEnumeration>

nsSVGEnum::ToDOMAnimatedEnum(nsSVGElement* aSVGElement)

{

  RefPtr<DOMAnimatedEnum> domAnimatedEnum =

    sSVGAnimatedEnumTearoffTable.GetTearoff(this);

  if (!domAnimatedEnum) {

    domAnimatedEnum = new DOMAnimatedEnum(this, aSVGElement);

    sSVGAnimatedEnumTearoffTable.AddTearoff(this, domAnimatedEnum);

  }

  return domAnimatedEnum.forget();

}

nsSVGEnum::DOMAnimatedEnum::~DOMAnimatedEnum()

{

  sSVGAnimatedEnumTearoffTable.RemoveTearoff(mVal);

}

UniquePtr<nsISMILAttr>

nsSVGEnum::ToSMILAttr(nsSVGElement *aSVGElement)

{

  return MakeUnique<SMILEnum>(this, aSVGElement);

}

nsresult

nsSVGEnum::SMILEnum::ValueFromString(const nsAString& aStr,

                                     const dom::SVGAnimationElement* /*aSrcElement*/,

                                     nsSMILValue& aValue,

                                     bool& aPreventCachingOfSandwich) const

{

  nsAtom *valAtom = NS_GetStaticAtom(aStr);

  if (valAtom) {

    nsSVGEnumMapping *mapping = mVal->GetMapping(mSVGElement);

    while (mapping && mapping->mKey) {

      if (valAtom == *(mapping->mKey)) {

        nsSMILValue val(SMILEnumType::Singleton());

        val.mU.mUint = mapping->mVal;

        aValue = val;

        aPreventCachingOfSandwich = false;

        return NS_OK;

      }

      mapping++;

    }

  }

  // only a warning since authors may mistype attribute values

  NS_WARNING("unknown enumeration key");

  return NS_ERROR_FAILURE;

}

nsSMILValue

nsSVGEnum::SMILEnum::GetBaseValue() const

{

  nsSMILValue val(SMILEnumType::Singleton());

  val.mU.mUint = mVal->mBaseVal;

  return val;

}

void

nsSVGEnum::SMILEnum::ClearAnimValue()

{

  if (mVal->mIsAnimated) {

    mVal->mIsAnimated = false;

    mVal->mAnimVal = mVal->mBaseVal;

    mSVGElement->DidAnimateEnum(mVal->mAttrEnum);

  }

}

nsresult

nsSVGEnum::SMILEnum::SetAnimValue(const nsSMILValue& aValue)

{

  NS_ASSERTION(aValue.mType == SMILEnumType::Singleton(),

               "Unexpected type to assign animated value");

  if (aValue.mType == SMILEnumType::Singleton()) {

    MOZ_ASSERT(aValue.mU.mUint <= USHRT_MAX,

               "Very large enumerated value - too big for uint16_t");

    mVal->SetAnimValue(uint16_t(aValue.mU.mUint), mSVGElement);

  }

  return NS_OK;

}