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SVGAnimatedInteger.h (3744B)

      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 DOM_SVG_SVGANIMATEDINTEGER_H_
      8 #define DOM_SVG_SVGANIMATEDINTEGER_H_
      9 
     10 #include "DOMSVGAnimatedInteger.h"
     11 #include "mozilla/SMILAttr.h"
     12 #include "mozilla/UniquePtr.h"
     13 #include "mozilla/dom/SVGElement.h"
     14 #include "nsCycleCollectionParticipant.h"
     15 #include "nsError.h"
     16 
     17 namespace mozilla {
     18 
     19 class SMILValue;
     20 
     21 namespace dom {
     22 class SVGAnimationElement;
     23 }  // namespace dom
     24 
     25 class SVGAnimatedInteger {
     26 public:
     27  friend class AutoChangeIntegerNotifier;
     28  using SVGElement = dom::SVGElement;
     29 
     30  void Init(uint8_t aAttrEnum = 0xff, int32_t aValue = 0) {
     31    mAnimVal = mBaseVal = aValue;
     32    mAttrEnum = aAttrEnum;
     33    mIsAnimated = false;
     34    mIsBaseSet = false;
     35  }
     36 
     37  nsresult SetBaseValueString(const nsAString& aValue, SVGElement* aSVGElement);
     38  void GetBaseValueString(nsAString& aValue);
     39 
     40  void SetBaseValue(int32_t aValue, SVGElement* aSVGElement);
     41  int32_t GetBaseValue() const { return mBaseVal; }
     42 
     43  void SetAnimValue(int aValue, SVGElement* aSVGElement);
     44  int GetAnimValue() const { return mAnimVal; }
     45 
     46  // Returns true if the animated value of this integer has been explicitly
     47  // set (either by animation, or by taking on the base value which has been
     48  // explicitly set by markup or a DOM call), false otherwise.
     49  // If this returns false, the animated value is still valid, that is,
     50  // usable, and represents the default base value of the attribute.
     51  bool IsExplicitlySet() const { return mIsAnimated || mIsBaseSet; }
     52 
     53  already_AddRefed<dom::DOMSVGAnimatedInteger> ToDOMAnimatedInteger(
     54      SVGElement* aSVGElement);
     55  UniquePtr<SMILAttr> ToSMILAttr(SVGElement* aSVGElement);
     56 
     57 private:
     58  int32_t mAnimVal;
     59  int32_t mBaseVal;
     60  uint8_t mAttrEnum;  // element specified tracking for attribute
     61  bool mIsAnimated;
     62  bool mIsBaseSet;
     63 
     64 public:
     65  struct DOMAnimatedInteger final : public dom::DOMSVGAnimatedInteger {
     66    DOMAnimatedInteger(SVGAnimatedInteger* aVal, SVGElement* aSVGElement)
     67        : dom::DOMSVGAnimatedInteger(aSVGElement), mVal(aVal) {}
     68    virtual ~DOMAnimatedInteger();
     69 
     70    SVGAnimatedInteger* mVal;  // kept alive because it belongs to content
     71 
     72    int32_t BaseVal() override { return mVal->GetBaseValue(); }
     73    void SetBaseVal(int32_t aValue) override {
     74      mVal->SetBaseValue(aValue, mSVGElement);
     75    }
     76 
     77    // Script may have modified animation parameters or timeline -- DOM getters
     78    // need to flush any resample requests to reflect these modifications.
     79    int32_t AnimVal() override {
     80      mSVGElement->FlushAnimations();
     81      return mVal->GetAnimValue();
     82    }
     83  };
     84 
     85  struct SMILInteger : public SMILAttr {
     86   public:
     87    SMILInteger(SVGAnimatedInteger* aVal, SVGElement* aSVGElement)
     88        : mVal(aVal), mSVGElement(aSVGElement) {}
     89 
     90    // These will stay alive because a SMILAttr only lives as long
     91    // as the Compositing step, and DOM elements don't get a chance to
     92    // die during that.
     93    SVGAnimatedInteger* mVal;
     94    SVGElement* mSVGElement;
     95 
     96    // SMILAttr methods
     97    nsresult ValueFromString(const nsAString& aStr,
     98                             const dom::SVGAnimationElement* aSrcElement,
     99                             SMILValue& aValue,
    100                             bool& aPreventCachingOfSandwich) const override;
    101    SMILValue GetBaseValue() const override;
    102    void ClearAnimValue() override;
    103    nsresult SetAnimValue(const SMILValue& aValue) override;
    104  };
    105 };
    106 
    107 }  // namespace mozilla
    108 
    109 #endif  // DOM_SVG_SVGANIMATEDINTEGER_H_