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/* -*- 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/. */
#ifndef DOM_SVG_SVGANIMATEDNUMBER_H_
#define DOM_SVG_SVGANIMATEDNUMBER_H_
#include "nsCycleCollectionParticipant.h"
#include "nsError.h"
#include "nsMathUtils.h"
#include "mozilla/Attributes.h"
#include "mozilla/FloatingPoint.h"
#include "mozilla/SMILAttr.h"
#include "mozilla/UniquePtr.h"
#include "mozilla/dom/DOMSVGAnimatedNumber.h"
#include "mozilla/dom/SVGElement.h"
namespace mozilla {
class SMILValue;
namespace dom {
class SVGAnimationElement;
} // namespace dom
class SVGAnimatedNumber {
public:
friend class AutoChangeNumberNotifier;
using SVGElement = dom::SVGElement;
void Init(uint8_t aAttrEnum = 0xff, float aValue = 0) {
mAnimVal = mBaseVal = aValue;
mAttrEnum = aAttrEnum;
mIsAnimated = false;
mIsBaseSet = false;
}
nsresult SetBaseValueString(const nsAString& aValue, SVGElement* aSVGElement);
void GetBaseValueString(nsAString& aValue);
void SetBaseValue(float aValue, SVGElement* aSVGElement);
float GetBaseValue() const { return mBaseVal; }
void SetAnimValue(float aValue, SVGElement* aSVGElement);
float GetAnimValue() const { return mAnimVal; }
// 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,
// usable, and represents the default base value of the attribute.
bool IsExplicitlySet() const { return mIsAnimated || mIsBaseSet; }
already_AddRefed<dom::DOMSVGAnimatedNumber> ToDOMAnimatedNumber(
SVGElement* aSVGElement);
UniquePtr<SMILAttr> ToSMILAttr(SVGElement* aSVGElement);
private:
float mAnimVal;
float mBaseVal;
uint8_t mAttrEnum; // element specified tracking for attribute
bool mIsAnimated;
bool mIsBaseSet;
public:
// DOM wrapper class for the (DOM)SVGAnimatedNumber interface where the
// wrapped class is SVGAnimatedNumber.
struct DOMAnimatedNumber final : public dom::DOMSVGAnimatedNumber {
DOMAnimatedNumber(SVGAnimatedNumber* aVal, SVGElement* aSVGElement)
: dom::DOMSVGAnimatedNumber(aSVGElement), mVal(aVal) {}
virtual ~DOMAnimatedNumber();
SVGAnimatedNumber* mVal; // kept alive because it belongs to content
float BaseVal() override { return mVal->GetBaseValue(); }
void SetBaseVal(float aValue) override {
MOZ_ASSERT(std::isfinite(aValue));
mVal->SetBaseValue(aValue, mSVGElement);
}
// Script may have modified animation parameters or timeline -- DOM getters
// need to flush any resample requests to reflect these modifications.
float AnimVal() override {
mSVGElement->FlushAnimations();
return mVal->GetAnimValue();
}
};
struct SMILNumber : public SMILAttr {
public:
SMILNumber(SVGAnimatedNumber* aVal, SVGElement* aSVGElement)
: mVal(aVal), mSVGElement(aSVGElement) {}
// These will stay alive because a SMILAttr only lives as long
// as the Compositing step, and DOM elements don't get a chance to
// die during that.
SVGAnimatedNumber* mVal;
SVGElement* mSVGElement;
// SMILAttr methods
virtual nsresult ValueFromString(
const nsAString& aStr, const dom::SVGAnimationElement* aSrcElement,
SMILValue& aValue, bool& aPreventCachingOfSandwich) const override;
SMILValue GetBaseValue() const override;
void ClearAnimValue() override;
nsresult SetAnimValue(const SMILValue& aValue) override;
};
};
} // namespace mozilla
#endif // DOM_SVG_SVGANIMATEDNUMBER_H_
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