LCOV - code coverage report
Current view: directory - content/svg/content/src - nsSVGAttrTearoffTable.h (source / functions) Found Hit Coverage
Test: app.info Lines: 23 4 17.4 %
Date: 2012-06-02 Functions: 40 16 40.0 %

       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                 :  * Contributor(s):
      18                 :  *   Brian Birtles <birtles@gmail.com>
      19                 :  *
      20                 :  * Alternatively, the contents of this file may be used under the terms of
      21                 :  * either the GNU General Public License Version 2 or later (the "GPL"), or
      22                 :  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      23                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      24                 :  * of those above. If you wish to allow use of your version of this file only
      25                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      26                 :  * use your version of this file under the terms of the MPL, indicate your
      27                 :  * decision by deleting the provisions above and replace them with the notice
      28                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      29                 :  * the provisions above, a recipient may use your version of this file under
      30                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      31                 :  *
      32                 :  * ***** END LICENSE BLOCK ***** */
      33                 : 
      34                 : #ifndef NS_SVGATTRTEAROFFTABLE_H_
      35                 : #define NS_SVGATTRTEAROFFTABLE_H_
      36                 : 
      37                 : #include "nsDataHashtable.h"
      38                 : #include "nsDebug.h"
      39                 : #include "nsHashKeys.h"
      40                 : 
      41                 : /**
      42                 :  * Global hashmap to associate internal SVG data types (e.g. nsSVGLength2) with
      43                 :  * DOM tear-off objects (e.g. nsIDOMSVGLength). This allows us to always return
      44                 :  * the same object for subsequent requests for DOM objects.
      45                 :  *
      46                 :  * We don't keep an owning reference to the tear-off objects so they are
      47                 :  * responsible for removing themselves from this table when they die.
      48                 :  */
      49                 : template<class SimpleType, class TearoffType>
      50                 : class nsSVGAttrTearoffTable
      51           13176 : {
      52                 : public:
      53           13383 :   ~nsSVGAttrTearoffTable()
      54                 :   {
      55           13383 :     NS_ABORT_IF_FALSE(mTable.Count() == 0,
      56                 :         "Tear-off objects remain in hashtable at shutdown.");
      57           13383 :   }
      58                 : 
      59                 :   TearoffType* GetTearoff(SimpleType* aSimple);
      60                 : 
      61                 :   void AddTearoff(SimpleType* aSimple, TearoffType* aTearoff);
      62                 : 
      63                 :   void RemoveTearoff(SimpleType* aSimple);
      64                 : 
      65                 : private:
      66                 :   typedef nsPtrHashKey<SimpleType> SimpleTypePtrKey;
      67                 :   typedef nsDataHashtable<SimpleTypePtrKey, TearoffType* > TearoffTable;
      68                 : 
      69                 :   TearoffTable mTable;
      70                 : };
      71                 : 
      72                 : template<class SimpleType, class TearoffType>
      73                 : TearoffType*
      74               0 : nsSVGAttrTearoffTable<SimpleType, TearoffType>::GetTearoff(SimpleType* aSimple)
      75                 : {
      76               0 :   if (!mTable.IsInitialized())
      77               0 :     return nsnull;
      78                 : 
      79               0 :   TearoffType *tearoff = nsnull;
      80                 : 
      81                 : #ifdef DEBUG
      82                 :   bool found =
      83                 : #endif
      84               0 :     mTable.Get(aSimple, &tearoff);
      85               0 :   NS_ABORT_IF_FALSE(!found || tearoff,
      86                 :       "NULL pointer stored in attribute tear-off map");
      87                 : 
      88               0 :   return tearoff;
      89                 : }
      90                 : 
      91                 : template<class SimpleType, class TearoffType>
      92                 : void
      93               0 : nsSVGAttrTearoffTable<SimpleType, TearoffType>::AddTearoff(SimpleType* aSimple,
      94                 :                                                           TearoffType* aTearoff)
      95                 : {
      96               0 :   if (!mTable.IsInitialized()) {
      97               0 :     mTable.Init();
      98                 :   }
      99                 : 
     100                 :   // We shouldn't be adding a tear-off if there already is one. If that happens,
     101                 :   // something is wrong.
     102               0 :   if (mTable.Get(aSimple, nsnull)) {
     103               0 :     NS_ABORT_IF_FALSE(false, "There is already a tear-off for this object.");
     104               0 :     return;
     105                 :   }
     106                 : 
     107                 : #ifdef DEBUG
     108                 :   bool result =
     109                 : #endif
     110               0 :     mTable.Put(aSimple, aTearoff);
     111               0 :   NS_ABORT_IF_FALSE(result, "Out of memory.");
     112                 : }
     113                 : 
     114                 : template<class SimpleType, class TearoffType>
     115                 : void
     116               0 : nsSVGAttrTearoffTable<SimpleType, TearoffType>::RemoveTearoff(
     117                 :     SimpleType* aSimple)
     118                 : {
     119               0 :   if (!mTable.IsInitialized()) {
     120                 :     // Perhaps something happened in between creating the SimpleType object and
     121                 :     // registering it
     122               0 :     return;
     123                 :   }
     124                 : 
     125               0 :   mTable.Remove(aSimple);
     126                 : }
     127                 : 
     128                 : #endif // NS_SVGATTRTEAROFFTABLE_H_

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