content/svg/content/src/nsSVGNumber2.h
author Ehsan Akhgari <ehsan@mozilla.com>
Mon, 17 Oct 2011 10:59:28 -0400
changeset 79324 ec7577dec4fceef0ac2717416d9c48289402d935
parent 78931 5eed5a82852c68eef20db520f08cdc4526829e1b
child 79326 f93960a93ad97a56d308bd9ce25d97cbc175d524
child 80363 8248dbffd64534fb6c65ad3d757b795119e783c6
permissions -rw-r--r--
Bug 690892 - Replace PR_TRUE/PR_FALSE with true/false on mozilla-central; rs=dbaron Landing on a CLOSED TREE

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
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 * 1.1 (the "License"); you may not use this file except in compliance with
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 *
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 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is the Mozilla SVG project.
 *
 * The Initial Developer of the Original Code is IBM Corporation.
 * Portions created by the Initial Developer are Copyright (C) 2006
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
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 * either of the GNU General Public License Version 2 or later (the "GPL"),
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#ifndef __NS_SVGNUMBER2_H__
#define __NS_SVGNUMBER2_H__

#include "nsIDOMSVGNumber.h"
#include "nsIDOMSVGAnimatedNumber.h"
#include "nsSVGElement.h"
#include "nsDOMError.h"
#include "nsMathUtils.h"

#ifdef MOZ_SMIL
#include "nsISMILAttr.h"
class nsSMILValue;
class nsISMILType;
#endif // MOZ_SMIL

class nsSVGNumber2
{

public:
  void Init(PRUint8 aAttrEnum = 0xff, float aValue = 0) {
    mAnimVal = mBaseVal = aValue;
    mAttrEnum = aAttrEnum;
    mIsAnimated = false;
    mIsBaseSet = false;
  }

  nsresult SetBaseValueString(const nsAString& aValue,
                              nsSVGElement *aSVGElement);
  void GetBaseValueString(nsAString& aValue);

  void SetBaseValue(float aValue, nsSVGElement *aSVGElement);
  float GetBaseValue() const
    { return mBaseVal; }
  void SetAnimValue(float aValue, nsSVGElement *aSVGElement);
  float GetAnimValue() const
    { return mAnimVal; }

  // 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; }

  nsresult ToDOMAnimatedNumber(nsIDOMSVGAnimatedNumber **aResult,
                               nsSVGElement* aSVGElement);
#ifdef MOZ_SMIL
  // Returns a new nsISMILAttr object that the caller must delete
  nsISMILAttr* ToSMILAttr(nsSVGElement* aSVGElement);
#endif // MOZ_SMIL

private:

  float mAnimVal;
  float mBaseVal;
  PRUint8 mAttrEnum; // element specified tracking for attribute
  bool mIsAnimated;
  bool mIsBaseSet;

public:
  struct DOMAnimatedNumber : public nsIDOMSVGAnimatedNumber
  {
    NS_DECL_CYCLE_COLLECTING_ISUPPORTS
    NS_DECL_CYCLE_COLLECTION_CLASS(DOMAnimatedNumber)

    DOMAnimatedNumber(nsSVGNumber2* aVal, nsSVGElement *aSVGElement)
      : mVal(aVal), mSVGElement(aSVGElement) {}

    nsSVGNumber2* mVal; // kept alive because it belongs to content
    nsRefPtr<nsSVGElement> mSVGElement;

    NS_IMETHOD GetBaseVal(float* aResult)
      { *aResult = mVal->GetBaseValue(); return NS_OK; }
    NS_IMETHOD SetBaseVal(float aValue)
      {
        if (!NS_finite(aValue)) {
          return NS_ERROR_ILLEGAL_VALUE;
        }
        mVal->SetBaseValue(aValue, mSVGElement);
        return NS_OK;
      }

    // Script may have modified animation parameters or timeline -- DOM getters
    // need to flush any resample requests to reflect these modifications.
    NS_IMETHOD GetAnimVal(float* aResult)
    {
#ifdef MOZ_SMIL
      mSVGElement->FlushAnimations();
#endif
      *aResult = mVal->GetAnimValue();
      return NS_OK;
    }
  };

#ifdef MOZ_SMIL
  struct SMILNumber : public nsISMILAttr
  {
  public:
    SMILNumber(nsSVGNumber2* 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.
    nsSVGNumber2* mVal;
    nsSVGElement* mSVGElement;

    // nsISMILAttr methods
    virtual nsresult ValueFromString(const nsAString& aStr,
                                     const nsISMILAnimationElement* aSrcElement,
                                     nsSMILValue& aValue,
                                     bool& aPreventCachingOfSandwich) const;
    virtual nsSMILValue GetBaseValue() const;
    virtual void ClearAnimValue();
    virtual nsresult SetAnimValue(const nsSMILValue& aValue);
  };
#endif // MOZ_SMIL
};

#endif //__NS_SVGNUMBER2_H__