/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * 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 Robert Longson.
 * Portions created by the Initial Developer are Copyright (C) 2007
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#ifndef __NS_SVGINTEGER_H__
#define __NS_SVGINTEGER_H__

#include "nsIDOMSVGAnimatedInteger.h"
#include "nsSVGElement.h"
#include "nsDOMError.h"

class nsSVGInteger
{

public:
  void Init(PRUint8 aAttrEnum = 0xff, PRInt32 aValue = 0) {
    mAnimVal = mBaseVal = aValue;
    mAttrEnum = aAttrEnum;
    mIsAnimated = PR_FALSE;
    mIsBaseSet = PR_FALSE;
  }

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

  void SetBaseValue(PRInt32 aValue, nsSVGElement *aSVGElement, PRBool aDoSetAttr);
  PRInt32 GetBaseValue() const
    { return mBaseVal; }

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

  // Returns PR_TRUE if the animated value of this integer 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), PR_FALSE otherwise.
  // If this returns PR_FALSE, the animated value is still valid, that is,
  // useable, and represents the default base value of the attribute.
  PRBool IsExplicitlySet() const
    { return mIsAnimated || mIsBaseSet; }
  
  nsresult ToDOMAnimatedInteger(nsIDOMSVGAnimatedInteger **aResult,
                                nsSVGElement* aSVGElement);
#ifdef MOZ_SMIL
  // Returns a new nsISMILAttr object that the caller must delete
  nsISMILAttr* ToSMILAttr(nsSVGElement* aSVGElement);
#endif // MOZ_SMIL
  
private:

  PRInt32 mAnimVal;
  PRInt32 mBaseVal;
  PRUint8 mAttrEnum; // element specified tracking for attribute
  PRPackedBool mIsAnimated;
  PRPackedBool mIsBaseSet;

public:
  struct DOMAnimatedInteger : public nsIDOMSVGAnimatedInteger
  {
    NS_DECL_CYCLE_COLLECTING_ISUPPORTS
    NS_DECL_CYCLE_COLLECTION_CLASS(DOMAnimatedInteger)

    DOMAnimatedInteger(nsSVGInteger* aVal, nsSVGElement *aSVGElement)
      : mVal(aVal), mSVGElement(aSVGElement) {}

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

    NS_IMETHOD GetBaseVal(PRInt32* aResult)
      { *aResult = mVal->GetBaseValue(); return NS_OK; }
    NS_IMETHOD SetBaseVal(PRInt32 aValue)
      { mVal->SetBaseValue(aValue, mSVGElement, PR_TRUE); 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(PRInt32* aResult)
    {
#ifdef MOZ_SMIL
      mSVGElement->FlushAnimations();
#endif
      *aResult = mVal->GetAnimValue();
      return NS_OK;
    }
  };

#ifdef MOZ_SMIL
  struct SMILInteger : public nsISMILAttr
  {
  public:
    SMILInteger(nsSVGInteger* 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.
    nsSVGInteger* mVal;
    nsSVGElement* mSVGElement;

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

#endif //__NS_SVGINTEGER_H__
