LCOV - code coverage report
Current view: directory - content/svg/content/src - SVGNumberListSMILType.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 87 2 2.3 %
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 Foundation.
      18                 :  * Portions created by the Initial Developer are Copyright (C) 2010
      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 "SVGNumberListSMILType.h"
      38                 : #include "nsSMILValue.h"
      39                 : #include "SVGNumberList.h"
      40                 : #include "nsMathUtils.h"
      41                 : #include <math.h>
      42                 : 
      43                 : /* The "identity" number list for a given number list attribute (the effective
      44                 :  * number list that is used if an attribute value is not specified) varies
      45                 :  * widely for different number list attributes, and can depend on the value of
      46                 :  * other attributes on the same element:
      47                 :  *
      48                 :  * http://www.w3.org/TR/SVG11/filters.html#feColorMatrixValuesAttribute
      49                 :  * http://www.w3.org/TR/SVG11/filters.html#feComponentTransferTableValuesAttribute
      50                 :  * http://www.w3.org/TR/SVG11/filters.html#feConvolveMatrixElementKernelMatrixAttribute
      51                 :  * http://www.w3.org/TR/SVG11/text.html#TextElementRotateAttribute
      52                 :  *
      53                 :  * Note that we don't need to worry about that variation here, however. The way
      54                 :  * that the SMIL engine creates and composites sandwich layers together allows
      55                 :  * us to treat "identity" nsSMILValue objects as a number list of zeros. Such
      56                 :  * identity nsSMILValues are identified by the fact that their
      57                 :  # SVGNumberListAndInfo has not been given an element yet.
      58                 :  */
      59                 : 
      60                 : namespace mozilla {
      61                 : 
      62            1464 : /*static*/ SVGNumberListSMILType SVGNumberListSMILType::sSingleton;
      63                 : 
      64                 : //----------------------------------------------------------------------
      65                 : // nsISMILType implementation
      66                 : 
      67                 : void
      68               0 : SVGNumberListSMILType::Init(nsSMILValue &aValue) const
      69                 : {
      70               0 :   NS_ABORT_IF_FALSE(aValue.IsNull(), "Unexpected value type");
      71                 : 
      72               0 :   SVGNumberListAndInfo* numberList = new SVGNumberListAndInfo();
      73                 : 
      74               0 :   aValue.mU.mPtr = numberList;
      75               0 :   aValue.mType = this;
      76               0 : }
      77                 : 
      78                 : void
      79               0 : SVGNumberListSMILType::Destroy(nsSMILValue& aValue) const
      80                 : {
      81               0 :   NS_PRECONDITION(aValue.mType == this, "Unexpected SMIL value type");
      82               0 :   delete static_cast<SVGNumberListAndInfo*>(aValue.mU.mPtr);
      83               0 :   aValue.mU.mPtr = nsnull;
      84               0 :   aValue.mType = &nsSMILNullType::sSingleton;
      85               0 : }
      86                 : 
      87                 : nsresult
      88               0 : SVGNumberListSMILType::Assign(nsSMILValue& aDest,
      89                 :                               const nsSMILValue& aSrc) const
      90                 : {
      91               0 :   NS_PRECONDITION(aDest.mType == aSrc.mType, "Incompatible SMIL types");
      92               0 :   NS_PRECONDITION(aDest.mType == this, "Unexpected SMIL value");
      93                 : 
      94                 :   const SVGNumberListAndInfo* src =
      95               0 :     static_cast<const SVGNumberListAndInfo*>(aSrc.mU.mPtr);
      96                 :   SVGNumberListAndInfo* dest =
      97               0 :     static_cast<SVGNumberListAndInfo*>(aDest.mU.mPtr);
      98                 : 
      99               0 :   return dest->CopyFrom(*src);
     100                 : }
     101                 : 
     102                 : bool
     103               0 : SVGNumberListSMILType::IsEqual(const nsSMILValue& aLeft,
     104                 :                                const nsSMILValue& aRight) const
     105                 : {
     106               0 :   NS_PRECONDITION(aLeft.mType == aRight.mType, "Incompatible SMIL types");
     107               0 :   NS_PRECONDITION(aLeft.mType == this, "Unexpected type for SMIL value");
     108                 : 
     109                 :   return *static_cast<const SVGNumberListAndInfo*>(aLeft.mU.mPtr) ==
     110               0 :          *static_cast<const SVGNumberListAndInfo*>(aRight.mU.mPtr);
     111                 : }
     112                 : 
     113                 : nsresult
     114               0 : SVGNumberListSMILType::Add(nsSMILValue& aDest,
     115                 :                            const nsSMILValue& aValueToAdd,
     116                 :                            PRUint32 aCount) const
     117                 : {
     118               0 :   NS_PRECONDITION(aDest.mType == this, "Unexpected SMIL type");
     119               0 :   NS_PRECONDITION(aValueToAdd.mType == this, "Incompatible SMIL type");
     120                 : 
     121                 :   SVGNumberListAndInfo& dest =
     122               0 :     *static_cast<SVGNumberListAndInfo*>(aDest.mU.mPtr);
     123                 :   const SVGNumberListAndInfo& valueToAdd =
     124               0 :     *static_cast<const SVGNumberListAndInfo*>(aValueToAdd.mU.mPtr);
     125                 : 
     126               0 :   NS_ABORT_IF_FALSE(dest.Element() || valueToAdd.Element(),
     127                 :                     "Target element propagation failure");
     128                 : 
     129               0 :   if (!valueToAdd.Element()) {
     130               0 :     NS_ABORT_IF_FALSE(valueToAdd.Length() == 0,
     131                 :                       "Not identity value - target element propagation failure");
     132               0 :     return NS_OK;
     133                 :   }
     134               0 :   if (!dest.Element()) {
     135               0 :     NS_ABORT_IF_FALSE(dest.Length() == 0,
     136                 :                       "Not identity value - target element propagation failure");
     137               0 :     if (!dest.SetLength(valueToAdd.Length())) {
     138               0 :       return NS_ERROR_OUT_OF_MEMORY;
     139                 :     }
     140               0 :     for (PRUint32 i = 0; i < dest.Length(); ++i) {
     141               0 :       dest[i] = aCount * valueToAdd[i];
     142                 :     }
     143               0 :     dest.SetInfo(valueToAdd.Element()); // propagate target element info!
     144               0 :     return NS_OK;
     145                 :   }
     146               0 :   NS_ABORT_IF_FALSE(dest.Element() == valueToAdd.Element(),
     147                 :                     "adding values from different elements...?");
     148               0 :   if (dest.Length() != valueToAdd.Length()) {
     149                 :     // For now we only support animation between lists with the same number of
     150                 :     // items. nsSVGUtils::ReportToConsole
     151               0 :     return NS_ERROR_FAILURE;
     152                 :   }
     153               0 :   for (PRUint32 i = 0; i < dest.Length(); ++i) {
     154               0 :     dest[i] += aCount * valueToAdd[i];
     155                 :   }
     156               0 :   dest.SetInfo(valueToAdd.Element()); // propagate target element info!
     157               0 :   return NS_OK;
     158                 : }
     159                 : 
     160                 : nsresult
     161               0 : SVGNumberListSMILType::ComputeDistance(const nsSMILValue& aFrom,
     162                 :                                        const nsSMILValue& aTo,
     163                 :                                        double& aDistance) const
     164                 : {
     165               0 :   NS_PRECONDITION(aFrom.mType == this, "Unexpected SMIL type");
     166               0 :   NS_PRECONDITION(aTo.mType == this, "Incompatible SMIL type");
     167                 : 
     168                 :   const SVGNumberListAndInfo& from =
     169               0 :     *static_cast<const SVGNumberListAndInfo*>(aFrom.mU.mPtr);
     170                 :   const SVGNumberListAndInfo& to =
     171               0 :     *static_cast<const SVGNumberListAndInfo*>(aTo.mU.mPtr);
     172                 : 
     173               0 :   if (from.Length() != to.Length()) {
     174                 :     // Lists in the 'values' attribute must have the same length.
     175                 :     // nsSVGUtils::ReportToConsole
     176               0 :     return NS_ERROR_FAILURE;
     177                 :   }
     178                 : 
     179                 :   // We return the root of the sum of the squares of the delta between the
     180                 :   // numbers at each correspanding index.
     181                 : 
     182               0 :   double total = 0.0;
     183                 : 
     184               0 :   for (PRUint32 i = 0; i < to.Length(); ++i) {
     185               0 :     double delta = to[i] - from[i];
     186               0 :     total += delta * delta;
     187                 :   }
     188               0 :   double distance = sqrt(total);
     189               0 :   if (!NS_finite(distance)) {
     190               0 :     return NS_ERROR_FAILURE;
     191                 :   }
     192               0 :   aDistance = distance;
     193                 : 
     194               0 :   return NS_OK;
     195                 : }
     196                 : 
     197                 : nsresult
     198               0 : SVGNumberListSMILType::Interpolate(const nsSMILValue& aStartVal,
     199                 :                                    const nsSMILValue& aEndVal,
     200                 :                                    double aUnitDistance,
     201                 :                                    nsSMILValue& aResult) const
     202                 : {
     203               0 :   NS_PRECONDITION(aStartVal.mType == aEndVal.mType,
     204                 :                   "Trying to interpolate different types");
     205               0 :   NS_PRECONDITION(aStartVal.mType == this,
     206                 :                   "Unexpected types for interpolation");
     207               0 :   NS_PRECONDITION(aResult.mType == this, "Unexpected result type");
     208                 : 
     209                 :   const SVGNumberListAndInfo& start =
     210               0 :     *static_cast<const SVGNumberListAndInfo*>(aStartVal.mU.mPtr);
     211                 :   const SVGNumberListAndInfo& end =
     212               0 :     *static_cast<const SVGNumberListAndInfo*>(aEndVal.mU.mPtr);
     213                 :   SVGNumberListAndInfo& result =
     214               0 :     *static_cast<SVGNumberListAndInfo*>(aResult.mU.mPtr);
     215                 : 
     216               0 :   NS_ABORT_IF_FALSE(end.Element(), "Can't propagate target element");
     217               0 :   NS_ABORT_IF_FALSE(start.Element() == end.Element() || !start.Element(),
     218                 :                     "Different target elements");
     219                 : 
     220               0 :   if (start.Element() && // 'start' is not an "identity" value
     221               0 :       start.Length() != end.Length()) {
     222                 :     // For now we only support animation between lists of the same length.
     223                 :     // nsSVGUtils::ReportToConsole
     224               0 :     return NS_ERROR_FAILURE;
     225                 :   }
     226               0 :   if (!result.SetLength(end.Length())) {
     227               0 :     return NS_ERROR_OUT_OF_MEMORY;
     228                 :   }
     229                 : 
     230               0 :   result.SetInfo(end.Element()); // propagate target element info!
     231                 : 
     232               0 :   if (start.Length() != end.Length()) {
     233               0 :     NS_ABORT_IF_FALSE(start.Length() == 0, "Not an identity value");
     234               0 :     for (PRUint32 i = 0; i < end.Length(); ++i) {
     235               0 :       result[i] = aUnitDistance * end[i];
     236                 :     }
     237               0 :     return NS_OK;
     238                 :   }
     239               0 :   for (PRUint32 i = 0; i < end.Length(); ++i) {
     240               0 :     result[i] = start[i] + (end[i] - start[i]) * aUnitDistance;
     241                 :   }
     242               0 :   return NS_OK;
     243                 : }
     244                 : 
     245            4392 : } // namespace mozilla

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