1 files changed, 134 insertions, 0 deletions
diff --git a/dom/svg/nsSVGNumberPair.h b/dom/svg/nsSVGNumberPair.h
new file mode 100644
index 000000000..54e28b486
--- /dev/null
+++ b/dom/svg/nsSVGNumberPair.h
@@ -0,0 +1,134 @@
+/* -*- 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__