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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/. */
#ifndef __NS_SVGNUMBERPAIR_H__
#define __NS_SVGNUMBERPAIR_H__
#include "nsCycleCollectionParticipant.h"
#include "nsError.h"
#include "nsISMILAttr.h"
#include "nsMathUtils.h"
#include "nsSVGElement.h"
#include "mozilla/Attributes.h"
#include "mozilla/dom/SVGAnimatedNumber.h"
#include "mozilla/FloatingPoint.h"
class nsSMILValue;
namespace mozilla {
namespace dom {
class SVGAnimationElement;
} // namespace dom
} // namespace mozilla
class nsSVGNumberPair
{
public:
enum PairIndex {
eFirst,
eSecond
};
void Init(uint8_t aAttrEnum = 0xff, float aValue1 = 0, float aValue2 = 0) {
mAnimVal[0] = mBaseVal[0] = aValue1;
mAnimVal[1] = mBaseVal[1] = aValue2;
mAttrEnum = aAttrEnum;
mIsAnimated = false;
mIsBaseSet = false;
}
nsresult SetBaseValueString(const nsAString& aValue,
nsSVGElement *aSVGElement);
void GetBaseValueString(nsAString& aValue) const;
void SetBaseValue(float aValue, PairIndex aIndex, nsSVGElement *aSVGElement);
void SetBaseValues(float aValue1, float aValue2, nsSVGElement *aSVGElement);
float GetBaseValue(PairIndex aIndex) const
{ return mBaseVal[aIndex == eFirst ? 0 : 1]; }
void SetAnimValue(const float aValue[2], nsSVGElement *aSVGElement);
float GetAnimValue(PairIndex aIndex) const
{ return mAnimVal[aIndex == eFirst ? 0 : 1]; }
// Returns true if the animated value of this number has been explicitly
// set (either by animation, or by taking on the base value which has been
// explicitly set by markup or a DOM call), false otherwise.
// If this returns false, the animated value is still valid, that is,
// useable, and represents the default base value of the attribute.
bool IsExplicitlySet() const
{ return mIsAnimated || mIsBaseSet; }
already_AddRefed<mozilla::dom::SVGAnimatedNumber>
ToDOMAnimatedNumber(PairIndex aIndex,
nsSVGElement* aSVGElement);
// Returns a new nsISMILAttr object that the caller must delete
nsISMILAttr* ToSMILAttr(nsSVGElement* aSVGElement);
private:
float mAnimVal[2];
float mBaseVal[2];
uint8_t mAttrEnum; // element specified tracking for attribute
bool mIsAnimated;
bool mIsBaseSet;
public:
struct DOMAnimatedNumber final : public mozilla::dom::SVGAnimatedNumber
{
DOMAnimatedNumber(nsSVGNumberPair* aVal, PairIndex aIndex, nsSVGElement *aSVGElement)
: mozilla::dom::SVGAnimatedNumber(aSVGElement)
, mVal(aVal)
, mIndex(aIndex)
{}
virtual ~DOMAnimatedNumber();
nsSVGNumberPair* mVal; // kept alive because it belongs to content
PairIndex mIndex; // are we the first or second number
virtual float BaseVal() override
{
return mVal->GetBaseValue(mIndex);
}
virtual void SetBaseVal(float aValue) override
{
MOZ_ASSERT(mozilla::IsFinite(aValue));
mVal->SetBaseValue(aValue, mIndex, mSVGElement);
}
// Script may have modified animation parameters or timeline -- DOM getters
// need to flush any resample requests to reflect these modifications.
virtual float AnimVal() override
{
mSVGElement->FlushAnimations();
return mVal->GetAnimValue(mIndex);
}
};
struct SMILNumberPair : public nsISMILAttr
{
public:
SMILNumberPair(nsSVGNumberPair* aVal, nsSVGElement* aSVGElement)
: mVal(aVal), mSVGElement(aSVGElement) {}
// These will stay alive because a nsISMILAttr only lives as long
// as the Compositing step, and DOM elements don't get a chance to
// die during that.
nsSVGNumberPair* mVal;
nsSVGElement* mSVGElement;
// nsISMILAttr methods
virtual nsresult ValueFromString(const nsAString& aStr,
const mozilla::dom::SVGAnimationElement* aSrcElement,
nsSMILValue& aValue,
bool& aPreventCachingOfSandwich) const override;
virtual nsSMILValue GetBaseValue() const override;
virtual void ClearAnimValue() override;
virtual nsresult SetAnimValue(const nsSMILValue& aValue) override;
};
};
#endif //__NS_SVGNUMBERPAIR_H__
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