68 lines
2.5 KiB
C++
68 lines
2.5 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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#ifndef MOZILLA_SVGORIENTSMILTYPE_H_
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#define MOZILLA_SVGORIENTSMILTYPE_H_
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#include "mozilla/Attributes.h"
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#include "nsISMILType.h"
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class nsSMILValue;
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/**
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* This nsISMILType class is a special case for the 'orient' attribute on SVG's
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* 'marker' element.
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*
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* orient = "auto | auto-start-reverse | <angle>"
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*
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* Unusually, this attribute doesn't have just a single corresponding DOM
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* property, but rather is split into two properties: 'orientType' (of type
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* SVGAnimatedEnumeration) and 'orientAngle' (of type SVGAnimatedAngle). If
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* 'orientType.animVal' is SVG_MARKER_ORIENT_ANGLE, then
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* 'orientAngle.animVal' contains the angle that is being used. The lacuna
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* value is 0.
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*
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* The SVG 2 specification does not define a
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* SVG_MARKER_ORIENT_AUTO_START_REVERSE constant value for orientType to use;
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* instead, if the attribute is set to "auto-start-reverse",
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* SVG_MARKER_ORIENT_UNKNOWN is used. Internally, however, we do use a
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* constant with this name.
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*/
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namespace mozilla {
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class SVGOrientSMILType : public nsISMILType
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{
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public:
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// Singleton for nsSMILValue objects to hold onto.
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static SVGOrientSMILType sSingleton;
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protected:
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// nsISMILType Methods
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// -------------------
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virtual void Init(nsSMILValue& aValue) const override;
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virtual void Destroy(nsSMILValue&) const override;
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virtual nsresult Assign(nsSMILValue& aDest, const nsSMILValue& aSrc) const override;
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virtual bool IsEqual(const nsSMILValue& aLeft,
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const nsSMILValue& aRight) const override;
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virtual nsresult Add(nsSMILValue& aDest, const nsSMILValue& aValueToAdd,
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uint32_t aCount) const override;
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virtual nsresult ComputeDistance(const nsSMILValue& aFrom,
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const nsSMILValue& aTo,
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double& aDistance) const override;
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virtual nsresult Interpolate(const nsSMILValue& aStartVal,
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const nsSMILValue& aEndVal,
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double aUnitDistance,
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nsSMILValue& aResult) const override;
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private:
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// Private constructor: prevent instances beyond my singleton.
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SVGOrientSMILType() {}
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};
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} // namespace mozilla
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#endif // MOZILLA_SVGORIENTSMILTYPE_H_
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