/* 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 "SMILStringType.h"

#include "mozilla/SMILValue.h"
#include "nsDebug.h"
#include "nsString.h"

namespace mozilla {

void SMILStringType::InitValue(SMILValue& aValue) const {
  MOZ_ASSERT(aValue.IsNull(), "Unexpected value type");
  aValue.mU.mPtr = new nsString();
  aValue.mType = this;
}

void SMILStringType::DestroyValue(SMILValue& aValue) const {
  MOZ_ASSERT(aValue.mType == this, "Unexpected SMIL value");
  delete static_cast<nsAString*>(aValue.mU.mPtr);
  aValue.mU.mPtr = nullptr;
  aValue.mType = SMILNullType::Singleton();
}

nsresult SMILStringType::Assign(SMILValue& aDest, const SMILValue& aSrc) const {
  MOZ_ASSERT(aDest.mType == aSrc.mType, "Incompatible SMIL types");
  MOZ_ASSERT(aDest.mType == this, "Unexpected SMIL value");

  const nsAString* src = static_cast<const nsAString*>(aSrc.mU.mPtr);
  nsAString* dst = static_cast<nsAString*>(aDest.mU.mPtr);
  *dst = *src;
  return NS_OK;
}

bool SMILStringType::IsEqual(const SMILValue& aLeft,
                             const SMILValue& aRight) const {
  MOZ_ASSERT(aLeft.mType == aRight.mType, "Incompatible SMIL types");
  MOZ_ASSERT(aLeft.mType == this, "Unexpected type for SMIL value");

  const nsAString* leftString = static_cast<const nsAString*>(aLeft.mU.mPtr);
  const nsAString* rightString = static_cast<nsAString*>(aRight.mU.mPtr);
  return *leftString == *rightString;
}

nsresult SMILStringType::Add(SMILValue& aDest, const SMILValue& aValueToAdd,
                             uint32_t aCount) const {
  MOZ_ASSERT(aValueToAdd.mType == aDest.mType, "Trying to add invalid types");
  MOZ_ASSERT(aValueToAdd.mType == this, "Unexpected source type");
  return NS_ERROR_FAILURE;  // string values can't be added to each other
}

nsresult SMILStringType::ComputeDistance(const SMILValue& aFrom,
                                         const SMILValue& aTo,
                                         double& aDistance) const {
  MOZ_ASSERT(aFrom.mType == aTo.mType, "Trying to compare different types");
  MOZ_ASSERT(aFrom.mType == this, "Unexpected source type");
  return NS_ERROR_FAILURE;  // there is no concept of distance between string
                            // values
}

nsresult SMILStringType::Interpolate(const SMILValue& aStartVal,
                                     const SMILValue& aEndVal,
                                     double aUnitDistance,
                                     SMILValue& aResult) const {
  MOZ_ASSERT(aStartVal.mType == aEndVal.mType,
             "Trying to interpolate different types");
  MOZ_ASSERT(aStartVal.mType == this, "Unexpected types for interpolation");
  MOZ_ASSERT(aResult.mType == this, "Unexpected result type");
  return NS_ERROR_FAILURE;  // string values do not interpolate
}

}  // namespace mozilla