LCOV - code coverage report
Current view: directory - content/svg/content/src - DOMSVGTransformList.h (source / functions) Found Hit Coverage
Test: app.info Lines: 21 1 4.8 %
Date: 2012-06-02 Functions: 11 1 9.1 %

       1                 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
       2                 :  * vim: sw=2 ts=2 et lcs=trail\:.,tab\:>~ :
       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 the Mozilla SVG project.
      17                 :  *
      18                 :  * The Initial Developer of the Original Code is
      19                 :  * Crocodile Clips Ltd..
      20                 :  * Portions created by the Initial Developer are Copyright (C) 2001
      21                 :  * the Initial Developer. All Rights Reserved.
      22                 :  *
      23                 :  * Contributor(s):
      24                 :  *   Alex Fritze <alex.fritze@crocodile-clips.com> (original author)
      25                 :  *   Brian Birtles <birtles@gmail.com>
      26                 :  *
      27                 :  * Alternatively, the contents of this file may be used under the terms of
      28                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
      29                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      30                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      31                 :  * of those above. If you wish to allow use of your version of this file only
      32                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      33                 :  * use your version of this file under the terms of the MPL, indicate your
      34                 :  * decision by deleting the provisions above and replace them with the notice
      35                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      36                 :  * the provisions above, a recipient may use your version of this file under
      37                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      38                 :  *
      39                 :  * ***** END LICENSE BLOCK ***** */
      40                 : 
      41                 : #ifndef MOZILLA_DOMSVGTRANSFORMLIST_H__
      42                 : #define MOZILLA_DOMSVGTRANSFORMLIST_H__
      43                 : 
      44                 : #include "DOMSVGAnimatedTransformList.h"
      45                 : #include "nsAutoPtr.h"
      46                 : #include "nsCycleCollectionParticipant.h"
      47                 : #include "nsDebug.h"
      48                 : #include "nsIDOMSVGTransformList.h"
      49                 : #include "nsTArray.h"
      50                 : #include "SVGTransformList.h"
      51                 : 
      52                 : class nsIDOMSVGTransform;
      53                 : class nsSVGElement;
      54                 : 
      55                 : namespace mozilla {
      56                 : 
      57                 : class DOMSVGTransform;
      58                 : 
      59                 : /**
      60                 :  * Class DOMSVGTransformList
      61                 :  *
      62                 :  * This class is used to create the DOM tearoff objects that wrap internal
      63                 :  * SVGTransformList objects.
      64                 :  *
      65                 :  * See the architecture comment in DOMSVGAnimatedTransformList.h.
      66                 :  */
      67                 : class DOMSVGTransformList : public nsIDOMSVGTransformList,
      68                 :                             public nsWrapperCache
      69                 : {
      70                 :   friend class DOMSVGTransform;
      71                 : 
      72                 : public:
      73               0 :   NS_DECL_CYCLE_COLLECTING_ISUPPORTS
      74            1464 :   NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(DOMSVGTransformList)
      75                 :   NS_DECL_NSIDOMSVGTRANSFORMLIST
      76                 : 
      77               0 :   DOMSVGTransformList(DOMSVGAnimatedTransformList *aAList,
      78                 :                       const SVGTransformList &aInternalList)
      79               0 :     : mAList(aAList)
      80                 :   {
      81               0 :     SetIsProxy();
      82                 : 
      83                 :     // aInternalList must be passed in explicitly because we can't use
      84                 :     // InternalList() here. (Because it depends on IsAnimValList, which depends
      85                 :     // on this object having been assigned to aAList's mBaseVal or mAnimVal,
      86                 :     // which hasn't happend yet.)
      87                 : 
      88               0 :     InternalListLengthWillChange(aInternalList.Length()); // Sync mItems
      89               0 :   }
      90                 : 
      91               0 :   ~DOMSVGTransformList() {
      92                 :     // Our mAList's weak ref to us must be nulled out when we die. If GC has
      93                 :     // unlinked us using the cycle collector code, then that has already
      94                 :     // happened, and mAList is null.
      95               0 :     if (mAList) {
      96               0 :       ( IsAnimValList() ? mAList->mAnimVal : mAList->mBaseVal ) = nsnull;
      97                 :     }
      98               0 :   }
      99                 : 
     100                 :   virtual JSObject* WrapObject(JSContext *cx, XPCWrappedNativeScope *scope,
     101                 :                                bool *triedToWrap);
     102                 : 
     103               0 :   nsISupports* GetParentObject()
     104                 :   {
     105               0 :     return static_cast<nsIContent*>(Element());
     106                 :   }
     107                 : 
     108                 :   /**
     109                 :    * This will normally be the same as InternalList().Length(), except if we've
     110                 :    * hit OOM in which case our length will be zero.
     111                 :    */
     112               0 :   PRUint32 Length() const {
     113               0 :     NS_ABORT_IF_FALSE(mItems.IsEmpty() ||
     114                 :       mItems.Length() == InternalList().Length(),
     115                 :       "DOM wrapper's list length is out of sync");
     116               0 :     return mItems.Length();
     117                 :   }
     118                 : 
     119                 :   /// Called to notify us to synchronize our length and detach excess items.
     120                 :   void InternalListLengthWillChange(PRUint32 aNewLength);
     121                 : 
     122                 : private:
     123                 : 
     124               0 :   nsSVGElement* Element() const {
     125               0 :     return mAList->mElement;
     126                 :   }
     127                 : 
     128                 :   /// Used to determine if this list is the baseVal or animVal list.
     129               0 :   bool IsAnimValList() const {
     130               0 :     NS_ABORT_IF_FALSE(this == mAList->mBaseVal || this == mAList->mAnimVal,
     131                 :                       "Calling IsAnimValList() too early?!");
     132               0 :     return this == mAList->mAnimVal;
     133                 :   }
     134                 : 
     135                 :   /**
     136                 :    * Get a reference to this object's corresponding internal SVGTransformList.
     137                 :    *
     138                 :    * To simplify the code we just have this one method for obtaining both
     139                 :    * baseVal and animVal internal lists. This means that animVal lists don't
     140                 :    * get const protection, but our setter methods guard against changing
     141                 :    * animVal lists.
     142                 :    */
     143                 :   SVGTransformList& InternalList() const;
     144                 : 
     145                 :   /// Creates a DOMSVGTransform for aIndex, if it doesn't already exist.
     146                 :   void EnsureItemAt(PRUint32 aIndex);
     147                 : 
     148                 :   void MaybeInsertNullInAnimValListAt(PRUint32 aIndex);
     149                 :   void MaybeRemoveItemFromAnimValListAt(PRUint32 aIndex);
     150                 : 
     151                 :   // Weak refs to our DOMSVGTransform items. The items are friends and take care
     152                 :   // of clearing our pointer to them when they die.
     153                 :   nsTArray<DOMSVGTransform*> mItems;
     154                 : 
     155                 :   nsRefPtr<DOMSVGAnimatedTransformList> mAList;
     156                 : };
     157                 : 
     158                 : } // namespace mozilla
     159                 : 
     160                 : #endif // MOZILLA_DOMSVGTRANSFORMLIST_H__

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