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Diffstat (limited to 'dom/svg/SVGPointListSMILType.cpp')
| -rw-r--r-- | dom/svg/SVGPointListSMILType.cpp | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/dom/svg/SVGPointListSMILType.cpp b/dom/svg/SVGPointListSMILType.cpp new file mode 100644 index 000000000..4b8c6abe7 --- /dev/null +++ b/dom/svg/SVGPointListSMILType.cpp @@ -0,0 +1,196 @@ +/* -*- 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 "SVGPointListSMILType.h" +#include "nsSMILValue.h" +#include "SVGPointList.h" +#include "nsMathUtils.h" +#include "mozilla/FloatingPoint.h" +#include <math.h> + +namespace mozilla { + +/*static*/ SVGPointListSMILType SVGPointListSMILType::sSingleton; + +//---------------------------------------------------------------------- +// nsISMILType implementation + +void +SVGPointListSMILType::Init(nsSMILValue &aValue) const +{ + MOZ_ASSERT(aValue.IsNull(), "Unexpected value type"); + + SVGPointListAndInfo* pointList = new SVGPointListAndInfo(); + + aValue.mU.mPtr = pointList; + aValue.mType = this; +} + +void +SVGPointListSMILType::Destroy(nsSMILValue& aValue) const +{ + NS_PRECONDITION(aValue.mType == this, "Unexpected SMIL value type"); + delete static_cast<SVGPointListAndInfo*>(aValue.mU.mPtr); + aValue.mU.mPtr = nullptr; + aValue.mType = nsSMILNullType::Singleton(); +} + +nsresult +SVGPointListSMILType::Assign(nsSMILValue& aDest, + const nsSMILValue& aSrc) const +{ + NS_PRECONDITION(aDest.mType == aSrc.mType, "Incompatible SMIL types"); + NS_PRECONDITION(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 nsSMILValue& aLeft, + const nsSMILValue& aRight) const +{ + NS_PRECONDITION(aLeft.mType == aRight.mType, "Incompatible SMIL types"); + NS_PRECONDITION(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(nsSMILValue& aDest, + const nsSMILValue& aValueToAdd, + uint32_t aCount) const +{ + NS_PRECONDITION(aDest.mType == this, "Unexpected SMIL type"); + NS_PRECONDITION(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 nsSMILValue& aFrom, + const nsSMILValue& aTo, + double& aDistance) const +{ + NS_PRECONDITION(aFrom.mType == this, "Unexpected SMIL type"); + NS_PRECONDITION(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 (!IsFinite(distance)) { + return NS_ERROR_FAILURE; + } + aDistance = distance; + + return NS_OK; +} + +nsresult +SVGPointListSMILType::Interpolate(const nsSMILValue& aStartVal, + const nsSMILValue& aEndVal, + double aUnitDistance, + nsSMILValue& aResult) const +{ + NS_PRECONDITION(aStartVal.mType == aEndVal.mType, + "Trying to interpolate different types"); + NS_PRECONDITION(aStartVal.mType == this, + "Unexpected types for interpolation"); + NS_PRECONDITION(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 |