dom/smil/nsSMILFloatType.cpp
author André Bargull <andre.bargull@gmail.com>
Fri, 17 Aug 2018 14:30:37 -0700
changeset 432230 fd8d17192696250a5396894301478f36c6c75be7
parent 417276 a31c1b8a41f81fb564bd86e1c22617595d61a42d
child 448947 6f3709b3878117466168c40affa7bca0b60cf75b
permissions -rw-r--r--
Bug 1346211 - Part 7: Clobber after modifying ICU data file. r=clobber

/* -*- 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 "nsSMILFloatType.h"
#include "nsSMILValue.h"
#include "nsDebug.h"
#include <math.h>

void
nsSMILFloatType::Init(nsSMILValue& aValue) const
{
  MOZ_ASSERT(aValue.IsNull(), "Unexpected value type");
  aValue.mU.mDouble = 0.0;
  aValue.mType = this;
}

void
nsSMILFloatType::Destroy(nsSMILValue& aValue) const
{
  MOZ_ASSERT(aValue.mType == this, "Unexpected SMIL value");
  aValue.mU.mDouble = 0.0;
  aValue.mType      = nsSMILNullType::Singleton();
}

nsresult
nsSMILFloatType::Assign(nsSMILValue& aDest, const nsSMILValue& aSrc) const
{
  MOZ_ASSERT(aDest.mType == aSrc.mType, "Incompatible SMIL types");
  MOZ_ASSERT(aDest.mType == this, "Unexpected SMIL value");
  aDest.mU.mDouble = aSrc.mU.mDouble;
  return NS_OK;
}

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

  return aLeft.mU.mDouble == aRight.mU.mDouble;
}

nsresult
nsSMILFloatType::Add(nsSMILValue& aDest, const nsSMILValue& aValueToAdd,
                     uint32_t aCount) const
{
  MOZ_ASSERT(aValueToAdd.mType == aDest.mType,
                  "Trying to add invalid types");
  MOZ_ASSERT(aValueToAdd.mType == this, "Unexpected source type");
  aDest.mU.mDouble += aValueToAdd.mU.mDouble * aCount;
  return NS_OK;
}

nsresult
nsSMILFloatType::ComputeDistance(const nsSMILValue& aFrom,
                                 const nsSMILValue& aTo,
                                 double& aDistance) const
{
  MOZ_ASSERT(aFrom.mType == aTo.mType, "Trying to compare different types");
  MOZ_ASSERT(aFrom.mType == this, "Unexpected source type");

  const double &from = aFrom.mU.mDouble;
  const double &to   = aTo.mU.mDouble;

  aDistance = fabs(to - from);

  return NS_OK;
}

nsresult
nsSMILFloatType::Interpolate(const nsSMILValue& aStartVal,
                             const nsSMILValue& aEndVal,
                             double aUnitDistance,
                             nsSMILValue& 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");

  const double &startVal = aStartVal.mU.mDouble;
  const double &endVal   = aEndVal.mU.mDouble;

  aResult.mU.mDouble = (startVal + (endVal - startVal) * aUnitDistance);

  return NS_OK;
}