LCOV - code coverage report
Current view: directory - content/smil - SMILIntegerType.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 42 2 4.8 %
Date: 2012-06-02 Functions: 10 2 20.0 %

       1                 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2                 : /* ***** BEGIN LICENSE BLOCK *****
       3                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       4                 :  *
       5                 :  * The contents of this file are subject to the Mozilla Public License Version
       6                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       7                 :  * the License. You may obtain a copy of the License at
       8                 :  * http://www.mozilla.org/MPL/
       9                 :  *
      10                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      11                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      12                 :  * for the specific language governing rights and limitations under the
      13                 :  * License.
      14                 :  *
      15                 :  * The Original Code is the Mozilla SVG project.
      16                 :  *
      17                 :  * The Initial Developer of the Original Code is the Mozilla Corporation.
      18                 :  * Portions created by the Initial Developer are Copyright (C) 2009
      19                 :  * the Initial Developer. All Rights Reserved.
      20                 :  *
      21                 :  * Contributor(s):
      22                 :  *
      23                 :  * Alternatively, the contents of this file may be used under the terms of
      24                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
      25                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      26                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      27                 :  * of those above. If you wish to allow use of your version of this file only
      28                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      29                 :  * use your version of this file under the terms of the MPL, indicate your
      30                 :  * decision by deleting the provisions above and replace them with the notice
      31                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      32                 :  * the provisions above, a recipient may use your version of this file under
      33                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      34                 :  *
      35                 :  * ***** END LICENSE BLOCK ***** */
      36                 : 
      37                 : #include "SMILIntegerType.h"
      38                 : #include "nsSMILValue.h"
      39                 : #include "nsDebug.h"
      40                 : #include <math.h>
      41                 : 
      42                 : namespace mozilla {
      43                 : 
      44            1464 : /*static*/ SMILIntegerType SMILIntegerType::sSingleton;
      45                 : 
      46                 : void
      47               0 : SMILIntegerType::Init(nsSMILValue& aValue) const
      48                 : {
      49               0 :   NS_ABORT_IF_FALSE(aValue.IsNull(), "Unexpected value type");
      50               0 :   aValue.mU.mInt = 0;
      51               0 :   aValue.mType = this;
      52               0 : }
      53                 : 
      54                 : void
      55               0 : SMILIntegerType::Destroy(nsSMILValue& aValue) const
      56                 : {
      57               0 :   NS_PRECONDITION(aValue.mType == this, "Unexpected SMIL value");
      58               0 :   aValue.mU.mInt = 0;
      59               0 :   aValue.mType = &nsSMILNullType::sSingleton;
      60               0 : }
      61                 : 
      62                 : nsresult
      63               0 : SMILIntegerType::Assign(nsSMILValue& aDest, const nsSMILValue& aSrc) const
      64                 : {
      65               0 :   NS_PRECONDITION(aDest.mType == aSrc.mType, "Incompatible SMIL types");
      66               0 :   NS_PRECONDITION(aDest.mType == this, "Unexpected SMIL value");
      67               0 :   aDest.mU.mInt = aSrc.mU.mInt;
      68               0 :   return NS_OK;
      69                 : }
      70                 : 
      71                 : bool
      72               0 : SMILIntegerType::IsEqual(const nsSMILValue& aLeft,
      73                 :                          const nsSMILValue& aRight) const
      74                 : {
      75               0 :   NS_PRECONDITION(aLeft.mType == aRight.mType, "Incompatible SMIL types");
      76               0 :   NS_PRECONDITION(aLeft.mType == this, "Unexpected type for SMIL value");
      77                 : 
      78               0 :   return aLeft.mU.mInt == aRight.mU.mInt;
      79                 : }
      80                 : 
      81                 : nsresult
      82               0 : SMILIntegerType::Add(nsSMILValue& aDest, const nsSMILValue& aValueToAdd,
      83                 :                      PRUint32 aCount) const
      84                 : {
      85               0 :   NS_PRECONDITION(aValueToAdd.mType == aDest.mType,
      86                 :                   "Trying to add invalid types");
      87               0 :   NS_PRECONDITION(aValueToAdd.mType == this, "Unexpected source type");
      88               0 :   aDest.mU.mInt += aValueToAdd.mU.mInt * aCount;
      89               0 :   return NS_OK;
      90                 : }
      91                 : 
      92                 : nsresult
      93               0 : SMILIntegerType::ComputeDistance(const nsSMILValue& aFrom,
      94                 :                                  const nsSMILValue& aTo,
      95                 :                                  double& aDistance) const
      96                 : {
      97               0 :   NS_PRECONDITION(aFrom.mType == aTo.mType,"Trying to compare different types");
      98               0 :   NS_PRECONDITION(aFrom.mType == this, "Unexpected source type");
      99               0 :   aDistance = fabs(double(aTo.mU.mInt - aFrom.mU.mInt));
     100               0 :   return NS_OK;
     101                 : }
     102                 : 
     103                 : nsresult
     104               0 : SMILIntegerType::Interpolate(const nsSMILValue& aStartVal,
     105                 :                              const nsSMILValue& aEndVal,
     106                 :                              double aUnitDistance,
     107                 :                              nsSMILValue& aResult) const
     108                 : {
     109               0 :   NS_PRECONDITION(aStartVal.mType == aEndVal.mType,
     110                 :                   "Trying to interpolate different types");
     111               0 :   NS_PRECONDITION(aStartVal.mType == this,
     112                 :                   "Unexpected types for interpolation");
     113               0 :   NS_PRECONDITION(aResult.mType   == this, "Unexpected result type");
     114                 : 
     115               0 :   const double startVal   = double(aStartVal.mU.mInt);
     116               0 :   const double endVal     = double(aEndVal.mU.mInt);
     117               0 :   const double currentVal = startVal + (endVal - startVal) * aUnitDistance;
     118                 : 
     119                 :   // When currentVal is exactly midway between its two nearest integers, we
     120                 :   // jump to the "next" integer to provide simple, easy to remember and
     121                 :   // consistent behaviour (from the SMIL author's point of view).
     122                 : 
     123               0 :   if (startVal < endVal) {
     124               0 :     aResult.mU.mInt = PRInt64(floor(currentVal + 0.5)); // round mid up
     125                 :   } else {
     126               0 :     aResult.mU.mInt = PRInt64(ceil(currentVal - 0.5)); // round mid down
     127                 :   }
     128                 : 
     129               0 :   return NS_OK;
     130                 : }
     131                 : 
     132            4392 : } // namespace mozilla

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