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/* -*- 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
#include "SVGPointListSMILType.h"
#include "mozilla/FloatingPoint.h"
#include "mozilla/SMILValue.h"
#include "nsMathUtils.h"
#include "SVGPointList.h"
#include <math.h>
namespace mozilla {
/*static*/
SVGPointListSMILType SVGPointListSMILType::sSingleton;
//----------------------------------------------------------------------
// nsISMILType implementation
void SVGPointListSMILType::Init(SMILValue& aValue) const {
MOZ_ASSERT(aValue.IsNull(), "Unexpected value type");
aValue.mU.mPtr = new SVGPointListAndInfo();
aValue.mType = this;
}
void SVGPointListSMILType::Destroy(SMILValue& aValue) const {
MOZ_ASSERT(aValue.mType == this, "Unexpected SMIL value type");
delete static_cast<SVGPointListAndInfo*>(aValue.mU.mPtr);
aValue.mU.mPtr = nullptr;
aValue.mType = SMILNullType::Singleton();
}
nsresult SVGPointListSMILType::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 SVGPointListAndInfo* src =
static_cast<const SVGPointListAndInfo*>(aSrc.mU.mPtr);
SVGPointListAndInfo* dest = static_cast<SVGPointListAndInfo*>(aDest.mU.mPtr);
return dest->CopyFrom(*src);
}
bool SVGPointListSMILType::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");
return *static_cast<const SVGPointListAndInfo*>(aLeft.mU.mPtr) ==
*static_cast<const SVGPointListAndInfo*>(aRight.mU.mPtr);
}
nsresult SVGPointListSMILType::Add(SMILValue& aDest,
const SMILValue& aValueToAdd,
uint32_t aCount) const {
MOZ_ASSERT(aDest.mType == this, "Unexpected SMIL type");
MOZ_ASSERT(aValueToAdd.mType == this, "Incompatible SMIL type");
SVGPointListAndInfo& dest = *static_cast<SVGPointListAndInfo*>(aDest.mU.mPtr);
const SVGPointListAndInfo& valueToAdd =
*static_cast<const SVGPointListAndInfo*>(aValueToAdd.mU.mPtr);
MOZ_ASSERT(dest.Element() || valueToAdd.Element(),
"Target element propagation failure");
if (valueToAdd.IsIdentity()) {
return NS_OK;
}
if (dest.IsIdentity()) {
if (!dest.SetLength(valueToAdd.Length())) {
return NS_ERROR_OUT_OF_MEMORY;
}
for (uint32_t i = 0; i < dest.Length(); ++i) {
dest[i] = aCount * valueToAdd[i];
}
dest.SetInfo(valueToAdd.Element()); // propagate target element info!
return NS_OK;
}
MOZ_ASSERT(dest.Element() == valueToAdd.Element(),
"adding values from different elements...?");
if (dest.Length() != valueToAdd.Length()) {
// For now we only support animation between lists with the same number of
// items. SVGContentUtils::ReportToConsole
return NS_ERROR_FAILURE;
}
for (uint32_t i = 0; i < dest.Length(); ++i) {
dest[i] += aCount * valueToAdd[i];
}
dest.SetInfo(valueToAdd.Element()); // propagate target element info!
return NS_OK;
}
nsresult SVGPointListSMILType::ComputeDistance(const SMILValue& aFrom,
const SMILValue& aTo,
double& aDistance) const {
MOZ_ASSERT(aFrom.mType == this, "Unexpected SMIL type");
MOZ_ASSERT(aTo.mType == this, "Incompatible SMIL type");
const SVGPointListAndInfo& from =
*static_cast<const SVGPointListAndInfo*>(aFrom.mU.mPtr);
const SVGPointListAndInfo& to =
*static_cast<const SVGPointListAndInfo*>(aTo.mU.mPtr);
if (from.Length() != to.Length()) {
// Lists in the 'values' attribute must have the same length.
// SVGContentUtils::ReportToConsole
return NS_ERROR_FAILURE;
}
// We return the root of the sum of the squares of the distances between the
// points at each corresponding index.
double total = 0.0;
for (uint32_t i = 0; i < to.Length(); ++i) {
double dx = to[i].mX - from[i].mX;
double dy = to[i].mY - from[i].mY;
total += dx * dx + dy * dy;
}
double distance = sqrt(total);
if (!std::isfinite(distance)) {
return NS_ERROR_FAILURE;
}
aDistance = distance;
return NS_OK;
}
nsresult SVGPointListSMILType::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");
const SVGPointListAndInfo& start =
*static_cast<const SVGPointListAndInfo*>(aStartVal.mU.mPtr);
const SVGPointListAndInfo& end =
*static_cast<const SVGPointListAndInfo*>(aEndVal.mU.mPtr);
SVGPointListAndInfo& result =
*static_cast<SVGPointListAndInfo*>(aResult.mU.mPtr);
MOZ_ASSERT(end.Element(), "Can't propagate target element");
MOZ_ASSERT(start.Element() == end.Element() || !start.Element(),
"Different target elements");
if (start.Element() && // 'start' is not an "identity" value
start.Length() != end.Length()) {
// For now we only support animation between lists of the same length.
// SVGContentUtils::ReportToConsole
return NS_ERROR_FAILURE;
}
if (!result.SetLength(end.Length())) {
return NS_ERROR_OUT_OF_MEMORY;
}
result.SetInfo(end.Element()); // propagate target element info!
if (start.Length() != end.Length()) {
MOZ_ASSERT(start.Length() == 0, "Not an identity value");
for (uint32_t i = 0; i < end.Length(); ++i) {
result[i] = aUnitDistance * end[i];
}
return NS_OK;
}
for (uint32_t i = 0; i < end.Length(); ++i) {
result[i] = start[i] + (end[i] - start[i]) * aUnitDistance;
}
return NS_OK;
}
} // namespace mozilla