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