зеркало из https://github.com/mozilla/gecko-dev.git
77 строки
2.7 KiB
C++
77 строки
2.7 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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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/* implementation of SMILType for use by <animateMotion> element */
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#ifndef DOM_SVG_SVGMOTIONSMILTYPE_H_
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#define DOM_SVG_SVGMOTIONSMILTYPE_H_
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#include "mozilla/gfx/2D.h"
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#include "mozilla/Attributes.h"
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#include "mozilla/SMILType.h"
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namespace mozilla {
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class SMILValue;
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/**
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* MotionRotateType: Enum to indicate the type of our "rotate" attribute.
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*/
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enum RotateType {
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eRotateType_Explicit, // for e.g. rotate="45"/"45deg"/"0.785rad"
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eRotateType_Auto, // for rotate="auto"
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eRotateType_AutoReverse // for rotate="auto-reverse"
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};
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/**
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* SVGMotionSMILType: Implements the SMILType interface for SMIL animations
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* from <animateMotion>.
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*
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* NOTE: Even though there's technically no "motion" attribute, we behave in
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* many ways as if there were, for simplicity.
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*/
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class SVGMotionSMILType : public SMILType {
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using Path = mozilla::gfx::Path;
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public:
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// Singleton for SMILValue objects to hold onto.
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static SVGMotionSMILType sSingleton;
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protected:
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// SMILType Methods
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// -------------------
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void Init(SMILValue& aValue) const override;
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void Destroy(SMILValue& aValue) const override;
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nsresult Assign(SMILValue& aDest, const SMILValue& aSrc) const override;
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bool IsEqual(const SMILValue& aLeft, const SMILValue& aRight) const override;
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nsresult Add(SMILValue& aDest, const SMILValue& aValueToAdd,
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uint32_t aCount) const override;
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nsresult SandwichAdd(SMILValue& aDest,
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const SMILValue& aValueToAdd) const override;
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nsresult ComputeDistance(const SMILValue& aFrom, const SMILValue& aTo,
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double& aDistance) const override;
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nsresult Interpolate(const SMILValue& aStartVal, const SMILValue& aEndVal,
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double aUnitDistance, SMILValue& aResult) const override;
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public:
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// Used to generate a transform matrix from an <animateMotion> SMILValue.
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static gfx::Matrix CreateMatrix(const SMILValue& aSMILVal);
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// Used to generate a SMILValue for the point at the given distance along
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// the given path.
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static SMILValue ConstructSMILValue(Path* aPath, float aDist,
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RotateType aRotateType,
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float aRotateAngle);
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private:
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// Private constructor: prevent instances beyond my singleton.
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constexpr SVGMotionSMILType() = default;
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};
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} // namespace mozilla
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#endif // DOM_SVG_SVGMOTIONSMILTYPE_H_
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