1 files changed, 124 insertions, 0 deletions
diff --git a/dom/svg/SVGAnimatedNumberPair.h b/dom/svg/SVGAnimatedNumberPair.h
new file mode 100644
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+++ b/dom/svg/SVGAnimatedNumberPair.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 DOM_SVG_SVGANIMATEDNUMBERPAIR_H_
+#define DOM_SVG_SVGANIMATEDNUMBERPAIR_H_
+
+#include "DOMSVGAnimatedNumber.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"
+
+namespace mozilla {
+
+class SMILValue;
+
+namespace dom {
+class SVGAnimationElement;
+class SVGElement;
+}  // namespace dom
+
+class SVGAnimatedNumberPair {
+ public:
+  friend class AutoChangeNumberPairNotifier;
+  using SVGElement = dom::SVGElement;
+
+  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, SVGElement* aSVGElement);
+  void GetBaseValueString(nsAString& aValue) const;
+
+  void SetBaseValue(float aValue, PairIndex aPairIndex,
+                    SVGElement* aSVGElement);
+  void SetBaseValues(float aValue1, float aValue2, SVGElement* aSVGElement);
+  float GetBaseValue(PairIndex aIndex) const {
+    return mBaseVal[aIndex == eFirst ? 0 : 1];
+  }
+  void SetAnimValue(const float aValue[2], SVGElement* 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,
+  // usable, and represents the default base value of the attribute.
+  bool IsExplicitlySet() const { return mIsAnimated || mIsBaseSet; }
+
+  already_AddRefed<dom::DOMSVGAnimatedNumber> ToDOMAnimatedNumber(
+      PairIndex aIndex, SVGElement* aSVGElement);
+  UniquePtr<SMILAttr> ToSMILAttr(SVGElement* aSVGElement);
+
+ private:
+  float mAnimVal[2];
+  float mBaseVal[2];
+  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 SVGAnimatedNumberPair.
+  struct DOMAnimatedNumber final : public dom::DOMSVGAnimatedNumber {
+    DOMAnimatedNumber(SVGAnimatedNumberPair* aVal, PairIndex aIndex,
+                      SVGElement* aSVGElement)
+        : dom::DOMSVGAnimatedNumber(aSVGElement), mVal(aVal), mIndex(aIndex) {}
+    virtual ~DOMAnimatedNumber();
+
+    SVGAnimatedNumberPair* 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(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 SMILAttr {
+   public:
+    SMILNumberPair(SVGAnimatedNumberPair* 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.
+    SVGAnimatedNumberPair* mVal;
+    SVGElement* mSVGElement;
+
+    // SMILAttr methods
+    virtual nsresult ValueFromString(
+        const nsAString& aStr, const dom::SVGAnimationElement* aSrcElement,
+        SMILValue& aValue, bool& aPreventCachingOfSandwich) const override;
+    virtual SMILValue GetBaseValue() const override;
+    virtual void ClearAnimValue() override;
+    virtual nsresult SetAnimValue(const SMILValue& aValue) override;
+  };
+};
+
+}  // namespace mozilla
+
+#endif  // DOM_SVG_SVGANIMATEDNUMBERPAIR_H_