author Jonathan Watt <>
Tue, 07 Jun 2016 21:10:18 +0100
changeset 301499 232a786cf87fb0f68f9bda6e9316515524d2ac8a
parent 252629 91d6e262b662a0b4e47358665e222d3927337af9
child 351215 7788981a1e0255061121aa50e844e785ef008bcd
permissions -rw-r--r--
Bug 1279451 - Remove a lot of unnecessary includes of nsAutoPtr.h. rs=sparky

/* -*- 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 */


#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

  enum PairIndex {

  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; }

    ToDOMAnimatedNumber(PairIndex aIndex,
                        nsSVGElement* aSVGElement);
  // Returns a new nsISMILAttr object that the caller must delete
  nsISMILAttr* ToSMILAttr(nsSVGElement* aSVGElement);


  float mAnimVal[2];
  float mBaseVal[2];
  uint8_t mAttrEnum; // element specified tracking for attribute
  bool mIsAnimated;
  bool mIsBaseSet;

  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
      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
      return mVal->GetAnimValue(mIndex);

  struct SMILNumberPair : public nsISMILAttr
    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;