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-rw-r--r--dom/svg/nsSVGNumberPair.h134
1 files changed, 134 insertions, 0 deletions
diff --git a/dom/svg/nsSVGNumberPair.h b/dom/svg/nsSVGNumberPair.h
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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 __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__