Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2             : /* vim: set ts=8 sts=2 et sw=2 tw=80: */
       3             : /* This Source Code Form is subject to the terms of the Mozilla Public
       4             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       5             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       6             : 
       7             : #ifndef __NS_SVGNUMBER2_H__
       8             : #define __NS_SVGNUMBER2_H__
       9             : 
      10             : #include "nsCycleCollectionParticipant.h"
      11             : #include "nsError.h"
      12             : #include "nsISMILAttr.h"
      13             : #include "nsMathUtils.h"
      14             : #include "nsSVGElement.h"
      15             : #include "mozilla/Attributes.h"
      16             : #include "mozilla/FloatingPoint.h"
      17             : #include "mozilla/dom/SVGAnimatedNumber.h"
      18             : #include "mozilla/UniquePtr.h"
      19             : 
      20             : class nsSMILValue;
      21             : 
      22             : namespace mozilla {
      23             : namespace dom {
      24             : class SVGAnimationElement;
      25             : } // namespace dom
      26             : } // namespace mozilla
      27             : 
      28             : class nsSVGNumber2
      29             : {
      30             : 
      31             : public:
      32          73 :   void Init(uint8_t aAttrEnum = 0xff, float aValue = 0) {
      33          73 :     mAnimVal = mBaseVal = aValue;
      34          73 :     mAttrEnum = aAttrEnum;
      35          73 :     mIsAnimated = false;
      36          73 :     mIsBaseSet = false;
      37          73 :   }
      38             : 
      39             :   nsresult SetBaseValueString(const nsAString& aValue,
      40             :                               nsSVGElement *aSVGElement);
      41             :   void GetBaseValueString(nsAString& aValue);
      42             : 
      43             :   void SetBaseValue(float aValue, nsSVGElement *aSVGElement);
      44           0 :   float GetBaseValue() const
      45           0 :     { return mBaseVal; }
      46             :   void SetAnimValue(float aValue, nsSVGElement *aSVGElement);
      47           0 :   float GetAnimValue() const
      48           0 :     { return mAnimVal; }
      49             : 
      50             :   // Returns true if the animated value of this number has been explicitly
      51             :   // set (either by animation, or by taking on the base value which has been
      52             :   // explicitly set by markup or a DOM call), false otherwise.
      53             :   // If this returns false, the animated value is still valid, that is,
      54             :   // useable, and represents the default base value of the attribute.
      55           0 :   bool IsExplicitlySet() const
      56           0 :     { return mIsAnimated || mIsBaseSet; }
      57             : 
      58             :   already_AddRefed<mozilla::dom::SVGAnimatedNumber>
      59             :   ToDOMAnimatedNumber(nsSVGElement* aSVGElement);
      60             :   mozilla::UniquePtr<nsISMILAttr> ToSMILAttr(nsSVGElement* aSVGElement);
      61             : 
      62             : private:
      63             :   float mAnimVal;
      64             :   float mBaseVal;
      65             :   uint8_t mAttrEnum; // element specified tracking for attribute
      66             :   bool mIsAnimated;
      67             :   bool mIsBaseSet;
      68             : 
      69             : public:
      70             :   struct DOMAnimatedNumber final : public mozilla::dom::SVGAnimatedNumber
      71             :   {
      72           0 :     DOMAnimatedNumber(nsSVGNumber2* aVal, nsSVGElement* aSVGElement)
      73           0 :       : mozilla::dom::SVGAnimatedNumber(aSVGElement)
      74           0 :       , mVal(aVal)
      75           0 :     {}
      76             :     virtual ~DOMAnimatedNumber();
      77             : 
      78             :     nsSVGNumber2* mVal; // kept alive because it belongs to content
      79             : 
      80           0 :     virtual float BaseVal() override
      81             :     {
      82           0 :       return mVal->GetBaseValue();
      83             :     }
      84           0 :     virtual void SetBaseVal(float aValue) override
      85             :     {
      86           0 :       MOZ_ASSERT(mozilla::IsFinite(aValue));
      87           0 :       mVal->SetBaseValue(aValue, mSVGElement);
      88           0 :     }
      89             : 
      90             :     // Script may have modified animation parameters or timeline -- DOM getters
      91             :     // need to flush any resample requests to reflect these modifications.
      92           0 :     virtual float AnimVal() override
      93             :     {
      94           0 :       mSVGElement->FlushAnimations();
      95           0 :       return mVal->GetAnimValue();
      96             :     }
      97             :   };
      98             : 
      99           0 :   struct SMILNumber : public nsISMILAttr
     100             :   {
     101             :   public:
     102           0 :     SMILNumber(nsSVGNumber2* aVal, nsSVGElement* aSVGElement)
     103           0 :     : mVal(aVal), mSVGElement(aSVGElement) {}
     104             : 
     105             :     // These will stay alive because a nsISMILAttr only lives as long
     106             :     // as the Compositing step, and DOM elements don't get a chance to
     107             :     // die during that.
     108             :     nsSVGNumber2* mVal;
     109             :     nsSVGElement* mSVGElement;
     110             : 
     111             :     // nsISMILAttr methods
     112             :     virtual nsresult ValueFromString(const nsAString& aStr,
     113             :                                      const mozilla::dom::SVGAnimationElement* aSrcElement,
     114             :                                      nsSMILValue& aValue,
     115             :                                      bool& aPreventCachingOfSandwich) const override;
     116             :     virtual nsSMILValue GetBaseValue() const override;
     117             :     virtual void ClearAnimValue() override;
     118             :     virtual nsresult SetAnimValue(const nsSMILValue& aValue) override;
     119             :   };
     120             : };
     121             : 
     122             : #endif //__NS_SVGNUMBER2_H__