LCOV - code coverage report
Current view: directory - content/svg/content/src - SVGMotionSMILPathUtils.h (source / functions) Found Hit Coverage
Test: app.info Lines: 9 0 0.0 %
Date: 2012-06-02 Functions: 4 0 0.0 %

       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                 :  *   Daniel Holbert <dholbert@mozilla.com>
      23                 :  *
      24                 :  * Alternatively, the contents of this file may be used under the terms of
      25                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
      26                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      27                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      28                 :  * of those above. If you wish to allow use of your version of this file only
      29                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      30                 :  * use your version of this file under the terms of the MPL, indicate your
      31                 :  * decision by deleting the provisions above and replace them with the notice
      32                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      33                 :  * the provisions above, a recipient may use your version of this file under
      34                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      35                 :  *
      36                 :  * ***** END LICENSE BLOCK ***** */
      37                 : 
      38                 : /* Helper class to help with generating anonymous path elements for
      39                 :    <animateMotion> elements to use. */
      40                 : 
      41                 : #ifndef MOZILLA_SVGMOTIONSMILPATHUTILS_H_
      42                 : #define MOZILLA_SVGMOTIONSMILPATHUTILS_H_
      43                 : 
      44                 : #include "gfxContext.h"
      45                 : #include "gfxPlatform.h"
      46                 : #include "nsCOMPtr.h"
      47                 : #include "nsDebug.h"
      48                 : #include "nsSMILParserUtils.h"
      49                 : #include "nsTArray.h"
      50                 : 
      51                 : class gfxFlattenedPath;
      52                 : class nsAString;
      53                 : class nsSVGElement;
      54                 : 
      55                 : namespace mozilla {
      56                 : 
      57                 : class SVGMotionSMILPathUtils {
      58                 : public:
      59                 :   // Class to assist in generating a gfxFlattenedPath, based on
      60                 :   // coordinates in the <animateMotion> from/by/to/values attributes.
      61               0 :   class PathGenerator {
      62                 :   public:
      63               0 :     PathGenerator(const nsSVGElement* aSVGElement)
      64                 :       : mSVGElement(aSVGElement),
      65                 :         mGfxContext(gfxPlatform::GetPlatform()->ScreenReferenceSurface()),
      66               0 :         mHaveReceivedCommands(false)
      67               0 :     {}
      68                 : 
      69                 :     // Methods for adding various path commands to output path.
      70                 :     // Note: aCoordPairStr is expected to be a whitespace and/or
      71                 :     // comma-separated x,y coordinate-pair -- see description of
      72                 :     // "the specified values for from, by, to, and values" at
      73                 :     //    http://www.w3.org/TR/SVG11/animate.html#AnimateMotionElement
      74                 :     void   MoveToOrigin();
      75                 :     bool MoveToAbsolute(const nsAString& aCoordPairStr);
      76                 :     bool LineToAbsolute(const nsAString& aCoordPairStr,
      77                 :                           double& aSegmentDistance);
      78                 :     bool LineToRelative(const nsAString& aCoordPairStr,
      79                 :                           double& aSegmentDistance);
      80                 : 
      81                 :     // Accessor to let clients check if we've received any commands yet.
      82               0 :     inline bool HaveReceivedCommands() { return mHaveReceivedCommands; }
      83                 :     // Accessor to get the finalized path
      84                 :     already_AddRefed<gfxFlattenedPath> GetResultingPath();
      85                 : 
      86                 :   protected:
      87                 :     // Helper methods
      88                 :     bool ParseCoordinatePair(const nsAString& aStr,
      89                 :                                float& aXVal, float& aYVal);
      90                 : 
      91                 :     // Member data
      92                 :     const nsSVGElement* mSVGElement; // context for converting to user units
      93                 :     gfxContext    mGfxContext;
      94                 :     bool          mHaveReceivedCommands;
      95                 :   };
      96                 : 
      97                 :   // Class to assist in passing each subcomponent of a |values| attribute to
      98                 :   // a PathGenerator, for generating a corresponding gfxFlattenedPath.
      99                 :   class MotionValueParser : public nsSMILParserUtils::GenericValueParser
     100                 :   {
     101                 :   public:
     102               0 :     MotionValueParser(PathGenerator* aPathGenerator,
     103                 :                       nsTArray<double>* aPointDistances)
     104                 :       : mPathGenerator(aPathGenerator),
     105                 :         mPointDistances(aPointDistances),
     106               0 :         mDistanceSoFar(0.0)
     107                 :     {
     108               0 :       NS_ABORT_IF_FALSE(mPointDistances->IsEmpty(),
     109                 :                         "expecting point distances array to start empty");
     110               0 :     }
     111                 : 
     112                 :     // nsSMILParserUtils::GenericValueParser interface
     113                 :     virtual nsresult Parse(const nsAString& aValueStr);
     114                 : 
     115                 :   protected:
     116                 :     PathGenerator*    mPathGenerator;
     117                 :     nsTArray<double>* mPointDistances;
     118                 :     double            mDistanceSoFar;
     119                 :   };
     120                 : 
     121                 : };
     122                 : 
     123                 : } // namespace mozilla
     124                 : 
     125                 : #endif // MOZILLA_SVGMOTIONSMILPATHUTILS_H_

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