diff options
Diffstat (limited to 'dom/svg/SVGOrientSMILType.cpp')
-rw-r--r-- | dom/svg/SVGOrientSMILType.cpp | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/dom/svg/SVGOrientSMILType.cpp b/dom/svg/SVGOrientSMILType.cpp new file mode 100644 index 0000000000..8086bc902f --- /dev/null +++ b/dom/svg/SVGOrientSMILType.cpp @@ -0,0 +1,145 @@ +/* -*- 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 "SVGOrientSMILType.h" + +#include "mozilla/SMILValue.h" +#include "mozilla/dom/SVGMarkerElement.h" +#include "nsDebug.h" +#include "SVGAnimatedOrient.h" +#include <math.h> + +namespace mozilla { + +using namespace dom::SVGAngle_Binding; +using namespace dom::SVGMarkerElement_Binding; + +/*static*/ +SVGOrientSMILType SVGOrientSMILType::sSingleton; + +void SVGOrientSMILType::Init(SMILValue& aValue) const { + MOZ_ASSERT(aValue.IsNull(), "Unexpected value type"); + + aValue.mU.mOrient.mAngle = 0.0f; + aValue.mU.mOrient.mUnit = SVG_ANGLETYPE_UNSPECIFIED; + aValue.mU.mOrient.mOrientType = SVG_MARKER_ORIENT_ANGLE; + aValue.mType = this; +} + +void SVGOrientSMILType::Destroy(SMILValue& aValue) const { + MOZ_ASSERT(aValue.mType == this, "Unexpected SMIL value."); + aValue.mU.mPtr = nullptr; + aValue.mType = SMILNullType::Singleton(); +} + +nsresult SVGOrientSMILType::Assign(SMILValue& aDest, + const SMILValue& aSrc) const { + MOZ_ASSERT(aDest.mType == aSrc.mType, "Incompatible SMIL types."); + MOZ_ASSERT(aDest.mType == this, "Unexpected SMIL value."); + + aDest.mU.mOrient.mAngle = aSrc.mU.mOrient.mAngle; + aDest.mU.mOrient.mUnit = aSrc.mU.mOrient.mUnit; + aDest.mU.mOrient.mOrientType = aSrc.mU.mOrient.mOrientType; + return NS_OK; +} + +bool SVGOrientSMILType::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 aLeft.mU.mOrient.mAngle == aRight.mU.mOrient.mAngle && + aLeft.mU.mOrient.mUnit == aRight.mU.mOrient.mUnit && + aLeft.mU.mOrient.mOrientType == aRight.mU.mOrient.mOrientType; +} + +static float ValueInDegrees(const SMILValue& aValue) { + MOZ_ASSERT(aValue.mU.mOrient.mOrientType == SVG_MARKER_ORIENT_ANGLE); + + return aValue.mU.mOrient.mAngle == 0.0f + ? 0.0f + : aValue.mU.mOrient.mAngle * SVGAnimatedOrient::GetDegreesPerUnit( + aValue.mU.mOrient.mUnit); +} + +nsresult SVGOrientSMILType::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"); + + if (aDest.mU.mOrient.mOrientType != SVG_MARKER_ORIENT_ANGLE || + aValueToAdd.mU.mOrient.mOrientType != SVG_MARKER_ORIENT_ANGLE) { + // TODO: it would be nice to be able to add to auto angles + return NS_ERROR_FAILURE; + } + + // We may be dealing with two different angle units, so we normalize to + // degrees for the add: + float currentAngle = ValueInDegrees(aDest); + float angleToAdd = ValueInDegrees(aValueToAdd) * aCount; + + // And then we give the resulting animated value the same units as the value + // that we're animating to/by (i.e. the same as aValueToAdd): + aDest.mU.mOrient.mAngle = + (currentAngle + angleToAdd) / + SVGAnimatedOrient::GetDegreesPerUnit(aValueToAdd.mU.mOrient.mUnit); + aDest.mU.mOrient.mUnit = aValueToAdd.mU.mOrient.mUnit; + + return NS_OK; +} + +nsresult SVGOrientSMILType::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"); + + if (aFrom.mU.mOrient.mOrientType != SVG_MARKER_ORIENT_ANGLE || + aTo.mU.mOrient.mOrientType != SVG_MARKER_ORIENT_ANGLE) { + // TODO: it would be nice to be able to compute distance with auto angles + return NS_ERROR_FAILURE; + } + + // Normalize both to degrees in case they're different angle units: + aDistance = fabs(ValueInDegrees(aTo) - ValueInDegrees(aFrom)); + + return NS_OK; +} + +nsresult SVGOrientSMILType::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."); + + if (aStartVal.mU.mOrient.mOrientType != SVG_MARKER_ORIENT_ANGLE || + aEndVal.mU.mOrient.mOrientType != SVG_MARKER_ORIENT_ANGLE) { + // TODO: it would be nice to be able to handle auto angles too. + return NS_ERROR_FAILURE; + } + + float start = ValueInDegrees(aStartVal); + float end = ValueInDegrees(aEndVal); + float result = (start + (end - start) * aUnitDistance); + + // we use the unit of the nearest value for the result: + if (aUnitDistance > 0.5) { + aResult.mU.mOrient.mAngle = + result / SVGAnimatedOrient::GetDegreesPerUnit(aEndVal.mU.mOrient.mUnit); + aResult.mU.mOrient.mUnit = aEndVal.mU.mOrient.mUnit; + } else { + aResult.mU.mOrient.mAngle = result / SVGAnimatedOrient::GetDegreesPerUnit( + aStartVal.mU.mOrient.mUnit); + aResult.mU.mOrient.mUnit = aStartVal.mU.mOrient.mUnit; + } + + return NS_OK; +} + +} // namespace mozilla |