LCOV - code coverage report
Current view: directory - layout/generic - nsIntervalSet.h (source / functions) Found Hit Coverage
Test: app.info Lines: 6 0 0.0 %
Date: 2012-06-02 Functions: 3 0 0.0 %

       1                 : /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2                 : // vim:cindent:ts=8:et:sw=4:
       3                 : /* ***** BEGIN LICENSE BLOCK *****
       4                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       5                 :  *
       6                 :  * The contents of this file are subject to the Mozilla Public License Version
       7                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       8                 :  * the License. You may obtain a copy of the License at
       9                 :  * http://www.mozilla.org/MPL/
      10                 :  *
      11                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      12                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      13                 :  * for the specific language governing rights and limitations under the
      14                 :  * License.
      15                 :  *
      16                 :  * The Original Code is nsIntervalSet. 
      17                 :  *
      18                 :  * The Initial Developer of the Original Code is Netscape Communications
      19                 :  * Corporation.  Portions created by the Initial Developer are Copyright
      20                 :  * (C) 2001 the Initial Developer. All Rights Reserved.
      21                 :  *
      22                 :  * Contributor(s):
      23                 :  *   L. David Baron <dbaron@dbaron.org> (original author)
      24                 :  *
      25                 :  * Alternatively, the contents of this file may be used under the terms of
      26                 :  * either the GNU General Public License Version 2 or later (the "GPL"), or
      27                 :  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      28                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      29                 :  * of those above. If you wish to allow use of your version of this file only
      30                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      31                 :  * use your version of this file under the terms of the MPL, indicate your
      32                 :  * decision by deleting the provisions above and replace them with the notice
      33                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      34                 :  * the provisions above, a recipient may use your version of this file under
      35                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      36                 :  *
      37                 :  * ***** END LICENSE BLOCK ***** */
      38                 : 
      39                 : /* a set of ranges on a number-line */
      40                 : 
      41                 : #ifndef nsIntervalSet_h___
      42                 : #define nsIntervalSet_h___
      43                 : 
      44                 : #include "prtypes.h"
      45                 : #include "nsCoord.h"
      46                 : #include "nsDebug.h"
      47                 : 
      48                 : typedef void *
      49                 : (* IntervalSetAlloc)(size_t aBytes, void *aClosure);
      50                 : 
      51                 : typedef void
      52                 : (* IntervalSetFree) (size_t aBytes, void *aPtr, void *aClosure);
      53                 : 
      54                 : /*
      55                 :  * A list-based class (hopefully tree-based when I get around to it)
      56                 :  * for representing a set of ranges on a number-line.
      57                 :  */
      58                 : class nsIntervalSet {
      59                 : 
      60                 : public:
      61                 : 
      62                 :     typedef nscoord coord_type;
      63                 : 
      64                 :     nsIntervalSet(IntervalSetAlloc aAlloc, IntervalSetFree aFree,
      65                 :                   void* aAllocatorClosure);
      66                 :     ~nsIntervalSet();
      67                 : 
      68                 :     /*
      69                 :      * Include the interval [aBegin, aEnd] in the set.
      70                 :      *
      71                 :      * Removal of intervals added is not supported because that would
      72                 :      * require keeping track of the individual intervals that were
      73                 :      * added (nsIntervalMap should do that).  It would be simple to
      74                 :      * implement ExcludeInterval if anyone wants it, though.
      75                 :      */
      76                 :     void IncludeInterval(coord_type aBegin, coord_type aEnd);
      77                 : 
      78                 :     /*
      79                 :      * Are _some_ points in [aBegin, aEnd] contained within the set
      80                 :      * of intervals?
      81                 :      */
      82                 :     bool Intersects(coord_type aBegin, coord_type aEnd) const;
      83                 : 
      84                 :     /*
      85                 :      * Are _all_ points in [aBegin, aEnd] contained within the set
      86                 :      * of intervals?
      87                 :      */
      88                 :     bool Contains(coord_type aBegin, coord_type aEnd) const;
      89                 : 
      90               0 :     bool IsEmpty() const
      91                 :     {
      92               0 :         return !mList;
      93                 :     }
      94                 : 
      95                 : private:
      96                 : 
      97               0 :     class Interval {
      98                 : 
      99                 :     public:
     100               0 :         Interval(coord_type aBegin, coord_type aEnd)
     101                 :             : mBegin(aBegin),
     102                 :               mEnd(aEnd),
     103                 :               mPrev(nsnull),
     104               0 :               mNext(nsnull)
     105                 :         {
     106               0 :         }
     107                 : 
     108                 :         coord_type mBegin;
     109                 :         coord_type mEnd;
     110                 :         Interval *mPrev;
     111                 :         Interval *mNext;
     112                 :     };
     113                 : 
     114                 :     void FreeInterval(Interval *aInterval);
     115                 : 
     116                 :     Interval           *mList;
     117                 :     IntervalSetAlloc    mAlloc;
     118                 :     IntervalSetFree     mFree;
     119                 :     void               *mAllocatorClosure;
     120                 :         
     121                 : };
     122                 : 
     123                 : #endif // !defined(nsIntervalSet_h___)

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