gecko-dev/dom/svg/nsSVGBoolean.h

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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_SVGBOOLEAN_H__
#define __NS_SVGBOOLEAN_H__

#include "nsCOMPtr.h"
#include "nsError.h"
#include "nsISMILAttr.h"
#include "mozilla/Attributes.h"

class nsIAtom;
class nsISupports;
class nsSMILValue;
class nsSVGElement;

namespace mozilla {
namespace dom {
class SVGAnimationElement;
class SVGAnimatedBoolean;
}
}

class nsSVGBoolean
{

public:
  void Init(uint8_t aAttrEnum = 0xff, bool aValue = false) {
    mAnimVal = mBaseVal = aValue;
    mAttrEnum = aAttrEnum;
    mIsAnimated = false;
  }

  nsresult SetBaseValueAtom(const nsIAtom* aValue, nsSVGElement *aSVGElement);
  nsIAtom* GetBaseValueAtom() const;

  void SetBaseValue(bool aValue, nsSVGElement *aSVGElement);
  bool GetBaseValue() const
    { return mBaseVal; }

  void SetAnimValue(bool aValue, nsSVGElement *aSVGElement);
  bool GetAnimValue() const
    { return mAnimVal; }

  already_AddRefed<mozilla::dom::SVGAnimatedBoolean>
    ToDOMAnimatedBoolean(nsSVGElement* aSVGElement);
  // Returns a new nsISMILAttr object that the caller must delete
  nsISMILAttr* ToSMILAttr(nsSVGElement* aSVGElement);

private:

  bool mAnimVal;
  bool mBaseVal;
  bool mIsAnimated;
  uint8_t mAttrEnum; // element specified tracking for attribute

public:
  struct SMILBool : public nsISMILAttr
  {
  public:
    SMILBool(nsSVGBoolean* 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.
    nsSVGBoolean* mVal;
    nsSVGElement* mSVGElement;

    // nsISMILAttr methods
    virtual nsresult ValueFromString(const nsAString& aStr,
                                     const mozilla::dom::SVGAnimationElement* aSrcElement,
                                     nsSMILValue& aValue,
                                     bool& aPreventCachingOfSandwich) const MOZ_OVERRIDE;
    virtual nsSMILValue GetBaseValue() const MOZ_OVERRIDE;
    virtual void ClearAnimValue() MOZ_OVERRIDE;
    virtual nsresult SetAnimValue(const nsSMILValue& aValue) MOZ_OVERRIDE;
  };
};
#endif //__NS_SVGBOOLEAN_H__