150 lines
5.4 KiB
C++
150 lines
5.4 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "SVGOrientSMILType.h"
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#include "nsSMILValue.h"
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#include "nsSVGAngle.h"
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#include "nsDebug.h"
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#include "mozilla/dom/SVGMarkerElement.h"
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#include <math.h>
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namespace mozilla {
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/*static*/ SVGOrientSMILType SVGOrientSMILType::sSingleton;
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void
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SVGOrientSMILType::Init(nsSMILValue& aValue) const
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{
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MOZ_ASSERT(aValue.IsNull(), "Unexpected value type");
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aValue.mU.mOrient.mAngle = 0.0f;
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aValue.mU.mOrient.mUnit = SVG_ANGLETYPE_UNSPECIFIED;
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aValue.mU.mOrient.mOrientType = dom::SVG_MARKER_ORIENT_ANGLE;
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aValue.mType = this;
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}
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void
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SVGOrientSMILType::Destroy(nsSMILValue& aValue) const
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{
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NS_PRECONDITION(aValue.mType == this, "Unexpected SMIL value.");
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aValue.mU.mPtr = nullptr;
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aValue.mType = nsSMILNullType::Singleton();
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}
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nsresult
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SVGOrientSMILType::Assign(nsSMILValue& aDest, const nsSMILValue& aSrc) const
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{
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NS_PRECONDITION(aDest.mType == aSrc.mType, "Incompatible SMIL types.");
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NS_PRECONDITION(aDest.mType == this, "Unexpected SMIL value.");
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aDest.mU.mOrient.mAngle = aSrc.mU.mOrient.mAngle;
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aDest.mU.mOrient.mUnit = aSrc.mU.mOrient.mUnit;
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aDest.mU.mOrient.mOrientType = aSrc.mU.mOrient.mOrientType;
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return NS_OK;
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}
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bool
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SVGOrientSMILType::IsEqual(const nsSMILValue& aLeft,
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const nsSMILValue& aRight) const
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{
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NS_PRECONDITION(aLeft.mType == aRight.mType, "Incompatible SMIL types");
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NS_PRECONDITION(aLeft.mType == this, "Unexpected type for SMIL value");
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return
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aLeft.mU.mOrient.mAngle == aRight.mU.mOrient.mAngle &&
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aLeft.mU.mOrient.mUnit == aRight.mU.mOrient.mUnit &&
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aLeft.mU.mOrient.mOrientType == aRight.mU.mOrient.mOrientType;
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}
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nsresult
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SVGOrientSMILType::Add(nsSMILValue& aDest, const nsSMILValue& aValueToAdd,
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uint32_t aCount) const
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{
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NS_PRECONDITION(aValueToAdd.mType == aDest.mType,
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"Trying to add invalid types");
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NS_PRECONDITION(aValueToAdd.mType == this, "Unexpected source type");
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if (aDest.mU.mOrient.mOrientType != dom::SVG_MARKER_ORIENT_ANGLE ||
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aValueToAdd.mU.mOrient.mOrientType != dom::SVG_MARKER_ORIENT_ANGLE) {
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// TODO: it would be nice to be able to add to auto angles
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return NS_ERROR_FAILURE;
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}
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// We may be dealing with two different angle units, so we normalize to
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// degrees for the add:
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float currentAngle = aDest.mU.mOrient.mAngle *
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nsSVGAngle::GetDegreesPerUnit(aDest.mU.mOrient.mUnit);
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float angleToAdd = aValueToAdd.mU.mOrient.mAngle *
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nsSVGAngle::GetDegreesPerUnit(aValueToAdd.mU.mOrient.mUnit) *
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aCount;
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// And then we give the resulting animated value the same units as the value
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// that we're animating to/by (i.e. the same as aValueToAdd):
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aDest.mU.mOrient.mAngle = (currentAngle + angleToAdd) /
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nsSVGAngle::GetDegreesPerUnit(aValueToAdd.mU.mOrient.mUnit);
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aDest.mU.mOrient.mUnit = aValueToAdd.mU.mOrient.mUnit;
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return NS_OK;
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}
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nsresult
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SVGOrientSMILType::ComputeDistance(const nsSMILValue& aFrom,
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const nsSMILValue& aTo,
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double& aDistance) const
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{
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NS_PRECONDITION(aFrom.mType == aTo.mType,"Trying to compare different types");
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NS_PRECONDITION(aFrom.mType == this, "Unexpected source type");
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if (aFrom.mU.mOrient.mOrientType != dom::SVG_MARKER_ORIENT_ANGLE ||
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aTo.mU.mOrient.mOrientType != dom::SVG_MARKER_ORIENT_ANGLE) {
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// TODO: it would be nice to be able to compute distance with auto angles
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return NS_ERROR_FAILURE;
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}
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// Normalize both to degrees in case they're different angle units:
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double from = aFrom.mU.mOrient.mAngle *
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nsSVGAngle::GetDegreesPerUnit(aFrom.mU.mOrient.mUnit);
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double to = aTo.mU.mOrient.mAngle *
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nsSVGAngle::GetDegreesPerUnit(aTo.mU.mOrient.mUnit);
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aDistance = fabs(to - from);
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return NS_OK;
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}
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nsresult
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SVGOrientSMILType::Interpolate(const nsSMILValue& aStartVal,
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const nsSMILValue& aEndVal,
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double aUnitDistance,
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nsSMILValue& aResult) const
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{
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NS_PRECONDITION(aStartVal.mType == aEndVal.mType,
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"Trying to interpolate different types");
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NS_PRECONDITION(aStartVal.mType == this,
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"Unexpected types for interpolation.");
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NS_PRECONDITION(aResult.mType == this, "Unexpected result type.");
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if (aStartVal.mU.mOrient.mOrientType != dom::SVG_MARKER_ORIENT_ANGLE ||
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aEndVal.mU.mOrient.mOrientType != dom::SVG_MARKER_ORIENT_ANGLE) {
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// TODO: it would be nice to be able to handle auto angles too.
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return NS_ERROR_FAILURE;
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}
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float start = aStartVal.mU.mOrient.mAngle *
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nsSVGAngle::GetDegreesPerUnit(aStartVal.mU.mOrient.mUnit);
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float end = aEndVal.mU.mOrient.mAngle *
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nsSVGAngle::GetDegreesPerUnit(aEndVal.mU.mOrient.mUnit);
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float result = (start + (end - start) * aUnitDistance);
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// Again, we use the unit of the to/by value for the result:
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aResult.mU.mOrient.mAngle = result /
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nsSVGAngle::GetDegreesPerUnit(aEndVal.mU.mOrient.mUnit);
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aResult.mU.mOrient.mUnit = aEndVal.mU.mOrient.mUnit;
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return NS_OK;
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}
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} // namespace mozilla
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