LCOV - code coverage report
Current view: directory - content/svg/content/src - DOMSVGTransformList.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 198 2 1.0 %
Date: 2012-06-02 Functions: 28 2 7.1 %

       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
      18                 :  * Crocodile Clips Ltd..
      19                 :  * Portions created by the Initial Developer are Copyright (C) 2001
      20                 :  * the Initial Developer. All Rights Reserved.
      21                 :  *
      22                 :  * Contributor(s):
      23                 :  *   Alex Fritze <alex.fritze@crocodile-clips.com> (original author)
      24                 :  *   Jonathan Watt <jonathan.watt@strath.ac.uk>
      25                 :  *
      26                 :  * Alternatively, the contents of this file may be used under the terms of
      27                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
      28                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      29                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      30                 :  * of those above. If you wish to allow use of your version of this file only
      31                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      32                 :  * use your version of this file under the terms of the MPL, indicate your
      33                 :  * decision by deleting the provisions above and replace them with the notice
      34                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      35                 :  * the provisions above, a recipient may use your version of this file under
      36                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      37                 :  *
      38                 :  * ***** END LICENSE BLOCK ***** */
      39                 : 
      40                 : #include "DOMSVGTransformList.h"
      41                 : #include "DOMSVGTransform.h"
      42                 : #include "DOMSVGMatrix.h"
      43                 : #include "SVGAnimatedTransformList.h"
      44                 : #include "nsSVGElement.h"
      45                 : #include "nsContentUtils.h"
      46                 : #include "dombindings.h"
      47                 : 
      48                 : // local helper functions
      49                 : namespace {
      50                 : 
      51               0 : void UpdateListIndicesFromIndex(
      52                 :   nsTArray<mozilla::DOMSVGTransform*>& aItemsArray,
      53                 :   PRUint32 aStartingIndex)
      54                 : {
      55               0 :   PRUint32 length = aItemsArray.Length();
      56                 : 
      57               0 :   for (PRUint32 i = aStartingIndex; i < length; ++i) {
      58               0 :     if (aItemsArray[i]) {
      59               0 :       aItemsArray[i]->UpdateListIndex(i);
      60                 :     }
      61                 :   }
      62               0 : }
      63                 : 
      64                 : } // anonymous namespace
      65                 : 
      66                 : namespace mozilla {
      67                 : 
      68                 : // We could use NS_IMPL_CYCLE_COLLECTION_1, except that in Unlink() we need to
      69                 : // clear our DOMSVGAnimatedTransformList's weak ref to us to be safe. (The other
      70                 : // option would be to not unlink and rely on the breaking of the other edges in
      71                 : // the cycle, as NS_SVG_VAL_IMPL_CYCLE_COLLECTION does.)
      72            1464 : NS_IMPL_CYCLE_COLLECTION_CLASS(DOMSVGTransformList)
      73               0 : NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(DOMSVGTransformList)
      74                 :   // No need to null check tmp - script/SMIL can't detach us from mAList
      75               0 :   ( tmp->IsAnimValList() ? tmp->mAList->mAnimVal : tmp->mAList->mBaseVal ) =
      76               0 :     nsnull;
      77               0 :   NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mAList)
      78               0 :   NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER
      79               0 : NS_IMPL_CYCLE_COLLECTION_UNLINK_END
      80               0 : NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(DOMSVGTransformList)
      81               0 :   NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mAList)
      82               0 :   NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS
      83               0 : NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
      84               0 : NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(DOMSVGTransformList)
      85               0 :   NS_IMPL_CYCLE_COLLECTION_TRACE_PRESERVED_WRAPPER
      86               0 : NS_IMPL_CYCLE_COLLECTION_TRACE_END
      87                 : 
      88               0 : NS_IMPL_CYCLE_COLLECTING_ADDREF(DOMSVGTransformList)
      89               0 : NS_IMPL_CYCLE_COLLECTING_RELEASE(DOMSVGTransformList)
      90                 : 
      91                 : } // namespace mozilla
      92                 : DOMCI_DATA(SVGTransformList, mozilla::DOMSVGTransformList)
      93                 : namespace mozilla {
      94                 : 
      95               0 : NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(DOMSVGTransformList)
      96               0 :   NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
      97               0 :   NS_INTERFACE_MAP_ENTRY(nsIDOMSVGTransformList)
      98               0 :   NS_INTERFACE_MAP_ENTRY(nsISupports)
      99               0 :   NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO(SVGTransformList)
     100               0 : NS_INTERFACE_MAP_END
     101                 : 
     102                 : //----------------------------------------------------------------------
     103                 : // DOMSVGTransformList methods:
     104                 : 
     105                 : JSObject*
     106               0 : DOMSVGTransformList::WrapObject(JSContext *cx, XPCWrappedNativeScope *scope,
     107                 :                                 bool *triedToWrap)
     108                 : {
     109                 :   return mozilla::dom::binding::SVGTransformList::create(cx, scope, this,
     110               0 :                                                          triedToWrap);
     111                 : }
     112                 : 
     113                 : nsIDOMSVGTransform*
     114               0 : DOMSVGTransformList::GetItemAt(PRUint32 aIndex)
     115                 : {
     116               0 :   if (IsAnimValList()) {
     117               0 :     Element()->FlushAnimations();
     118                 :   }
     119               0 :   if (aIndex < Length()) {
     120               0 :     EnsureItemAt(aIndex);
     121               0 :     return mItems[aIndex];
     122                 :   }
     123               0 :   return nsnull;
     124                 : }
     125                 : 
     126                 : void
     127               0 : DOMSVGTransformList::InternalListLengthWillChange(PRUint32 aNewLength)
     128                 : {
     129               0 :   PRUint32 oldLength = mItems.Length();
     130                 : 
     131               0 :   if (aNewLength > DOMSVGTransform::MaxListIndex()) {
     132                 :     // It's safe to get out of sync with our internal list as long as we have
     133                 :     // FEWER items than it does.
     134               0 :     aNewLength = DOMSVGTransform::MaxListIndex();
     135                 :   }
     136                 : 
     137               0 :   nsRefPtr<DOMSVGTransformList> kungFuDeathGrip;
     138               0 :   if (aNewLength < oldLength) {
     139                 :     // RemovingFromList() might clear last reference to |this|.
     140                 :     // Retain a temporary reference to keep from dying before returning.
     141               0 :     kungFuDeathGrip = this;
     142                 :   }
     143                 : 
     144                 :   // If our length will decrease, notify the items that will be removed:
     145               0 :   for (PRUint32 i = aNewLength; i < oldLength; ++i) {
     146               0 :     if (mItems[i]) {
     147               0 :       mItems[i]->RemovingFromList();
     148                 :     }
     149                 :   }
     150                 : 
     151               0 :   if (!mItems.SetLength(aNewLength)) {
     152                 :     // We silently ignore SetLength OOM failure since being out of sync is safe
     153                 :     // so long as we have *fewer* items than our internal list.
     154               0 :     mItems.Clear();
     155                 :     return;
     156                 :   }
     157                 : 
     158                 :   // If our length has increased, null out the new pointers:
     159               0 :   for (PRUint32 i = oldLength; i < aNewLength; ++i) {
     160               0 :     mItems[i] = nsnull;
     161                 :   }
     162                 : }
     163                 : 
     164                 : SVGTransformList&
     165               0 : DOMSVGTransformList::InternalList() const
     166                 : {
     167               0 :   SVGAnimatedTransformList *alist = Element()->GetAnimatedTransformList();
     168               0 :   return IsAnimValList() && alist->mAnimVal ?
     169               0 :     *alist->mAnimVal :
     170               0 :     alist->mBaseVal;
     171                 : }
     172                 : 
     173                 : //----------------------------------------------------------------------
     174                 : // nsIDOMSVGTransformList methods:
     175                 : 
     176                 : /* readonly attribute unsigned long numberOfItems; */
     177                 : NS_IMETHODIMP
     178               0 : DOMSVGTransformList::GetNumberOfItems(PRUint32 *aNumberOfItems)
     179                 : {
     180               0 :   if (IsAnimValList()) {
     181               0 :     Element()->FlushAnimations();
     182                 :   }
     183               0 :   *aNumberOfItems = Length();
     184               0 :   return NS_OK;
     185                 : }
     186                 : 
     187                 : /* readonly attribute unsigned long length; */
     188                 : NS_IMETHODIMP
     189               0 : DOMSVGTransformList::GetLength(PRUint32 *aLength)
     190                 : {
     191               0 :   return GetNumberOfItems(aLength);
     192                 : }
     193                 : 
     194                 : /* void clear (); */
     195                 : NS_IMETHODIMP
     196               0 : DOMSVGTransformList::Clear()
     197                 : {
     198               0 :   if (IsAnimValList()) {
     199               0 :     return NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR;
     200                 :   }
     201                 : 
     202               0 :   if (Length() > 0) {
     203               0 :     nsAttrValue emptyOrOldValue = Element()->WillChangeTransformList();
     204                 :     // Notify any existing DOM items of removal *before* truncating the lists
     205                 :     // so that they can find their SVGTransform internal counterparts and copy
     206                 :     // their values. This also notifies the animVal list:
     207               0 :     mAList->InternalBaseValListWillChangeLengthTo(0);
     208                 : 
     209               0 :     mItems.Clear();
     210               0 :     InternalList().Clear();
     211               0 :     Element()->DidChangeTransformList(emptyOrOldValue);
     212               0 :     if (mAList->IsAnimating()) {
     213               0 :       Element()->AnimationNeedsResample();
     214                 :     }
     215                 :   }
     216               0 :   return NS_OK;
     217                 : }
     218                 : 
     219                 : /* nsIDOMSVGTransform initialize (in nsIDOMSVGTransform newItem); */
     220                 : NS_IMETHODIMP
     221               0 : DOMSVGTransformList::Initialize(nsIDOMSVGTransform *newItem,
     222                 :                                 nsIDOMSVGTransform **_retval)
     223                 : {
     224               0 :   *_retval = nsnull;
     225               0 :   if (IsAnimValList()) {
     226               0 :     return NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR;
     227                 :   }
     228                 : 
     229                 :   // If newItem is already in a list we should insert a clone of newItem, and
     230                 :   // for consistency, this should happen even if *this* is the list that
     231                 :   // newItem is currently in. Note that in the case of newItem being in this
     232                 :   // list, the Clear() call before the InsertItemBefore() call would remove it
     233                 :   // from this list, and so the InsertItemBefore() call would not insert a
     234                 :   // clone of newItem, it would actually insert newItem. To prevent that from
     235                 :   // happening we have to do the clone here, if necessary.
     236                 : 
     237               0 :   nsCOMPtr<DOMSVGTransform> domItem = do_QueryInterface(newItem);
     238               0 :   if (!domItem) {
     239               0 :     return NS_ERROR_DOM_SVG_WRONG_TYPE_ERR;
     240                 :   }
     241               0 :   if (domItem->HasOwner()) {
     242               0 :     newItem = domItem->Clone();
     243                 :   }
     244                 : 
     245               0 :   Clear();
     246               0 :   return InsertItemBefore(newItem, 0, _retval);
     247                 : }
     248                 : 
     249                 : /* nsIDOMSVGTransform getItem (in unsigned long index); */
     250                 : NS_IMETHODIMP
     251               0 : DOMSVGTransformList::GetItem(PRUint32 index, nsIDOMSVGTransform **_retval)
     252                 : {
     253               0 :   *_retval = GetItemAt(index);
     254               0 :   if (!*_retval) {
     255               0 :     return NS_ERROR_DOM_INDEX_SIZE_ERR;
     256                 :   }
     257               0 :   NS_ADDREF(*_retval);
     258               0 :   return NS_OK;
     259                 : }
     260                 : 
     261                 : /* nsIDOMSVGTransform insertItemBefore (in nsIDOMSVGTransform newItem,
     262                 :  *                                      in unsigned long index); */
     263                 : NS_IMETHODIMP
     264               0 : DOMSVGTransformList::InsertItemBefore(nsIDOMSVGTransform *newItem,
     265                 :                                       PRUint32 index,
     266                 :                                       nsIDOMSVGTransform **_retval)
     267                 : {
     268               0 :   *_retval = nsnull;
     269               0 :   if (IsAnimValList()) {
     270               0 :     return NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR;
     271                 :   }
     272                 : 
     273               0 :   index = NS_MIN(index, Length());
     274               0 :   if (index >= DOMSVGTransform::MaxListIndex()) {
     275               0 :     return NS_ERROR_DOM_INDEX_SIZE_ERR;
     276                 :   }
     277                 : 
     278               0 :   nsCOMPtr<DOMSVGTransform> domItem = do_QueryInterface(newItem);
     279               0 :   if (!domItem) {
     280               0 :     return NS_ERROR_DOM_SVG_WRONG_TYPE_ERR;
     281                 :   }
     282               0 :   if (domItem->HasOwner()) {
     283               0 :     domItem = domItem->Clone(); // must do this before changing anything!
     284                 :   }
     285                 : 
     286                 :   // Ensure we have enough memory so we can avoid complex error handling below:
     287               0 :   if (!mItems.SetCapacity(mItems.Length() + 1) ||
     288               0 :       !InternalList().SetCapacity(InternalList().Length() + 1)) {
     289               0 :     return NS_ERROR_OUT_OF_MEMORY;
     290                 :   }
     291                 : 
     292               0 :   nsAttrValue emptyOrOldValue = Element()->WillChangeTransformList();
     293                 :   // Now that we know we're inserting, keep animVal list in sync as necessary.
     294               0 :   MaybeInsertNullInAnimValListAt(index);
     295                 : 
     296               0 :   InternalList().InsertItem(index, domItem->ToSVGTransform());
     297               0 :   mItems.InsertElementAt(index, domItem.get());
     298                 : 
     299                 :   // This MUST come after the insertion into InternalList(), or else under the
     300                 :   // insertion into InternalList() the values read from domItem would be bad
     301                 :   // data from InternalList() itself!:
     302               0 :   domItem->InsertingIntoList(this, index, IsAnimValList());
     303                 : 
     304               0 :   UpdateListIndicesFromIndex(mItems, index + 1);
     305                 : 
     306               0 :   Element()->DidChangeTransformList(emptyOrOldValue);
     307               0 :   if (mAList->IsAnimating()) {
     308               0 :     Element()->AnimationNeedsResample();
     309                 :   }
     310               0 :   *_retval = domItem.forget().get();
     311               0 :   return NS_OK;
     312                 : }
     313                 : 
     314                 : /* nsIDOMSVGTransform replaceItem (in nsIDOMSVGTransform newItem,
     315                 :  *                                 in unsigned long index); */
     316                 : NS_IMETHODIMP
     317               0 : DOMSVGTransformList::ReplaceItem(nsIDOMSVGTransform *newItem,
     318                 :                                  PRUint32 index,
     319                 :                                  nsIDOMSVGTransform **_retval)
     320                 : {
     321               0 :   *_retval = nsnull;
     322               0 :   if (IsAnimValList()) {
     323               0 :     return NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR;
     324                 :   }
     325                 : 
     326               0 :   nsCOMPtr<DOMSVGTransform> domItem = do_QueryInterface(newItem);
     327               0 :   if (!domItem) {
     328               0 :     return NS_ERROR_DOM_SVG_WRONG_TYPE_ERR;
     329                 :   }
     330               0 :   if (index >= Length()) {
     331               0 :     return NS_ERROR_DOM_INDEX_SIZE_ERR;
     332                 :   }
     333               0 :   if (domItem->HasOwner()) {
     334               0 :     domItem = domItem->Clone(); // must do this before changing anything!
     335                 :   }
     336                 : 
     337               0 :   nsAttrValue emptyOrOldValue = Element()->WillChangeTransformList();
     338               0 :   if (mItems[index]) {
     339                 :     // Notify any existing DOM item of removal *before* modifying the lists so
     340                 :     // that the DOM item can copy the *old* value at its index:
     341               0 :     mItems[index]->RemovingFromList();
     342                 :   }
     343                 : 
     344               0 :   InternalList()[index] = domItem->ToSVGTransform();
     345               0 :   mItems[index] = domItem;
     346                 : 
     347                 :   // This MUST come after the ToSVGPoint() call, otherwise that call
     348                 :   // would end up reading bad data from InternalList()!
     349               0 :   domItem->InsertingIntoList(this, index, IsAnimValList());
     350                 : 
     351               0 :   Element()->DidChangeTransformList(emptyOrOldValue);
     352               0 :   if (mAList->IsAnimating()) {
     353               0 :     Element()->AnimationNeedsResample();
     354                 :   }
     355               0 :   NS_ADDREF(*_retval = domItem.get());
     356               0 :   return NS_OK;
     357                 : }
     358                 : 
     359                 : /* nsIDOMSVGTransform removeItem (in unsigned long index); */
     360                 : NS_IMETHODIMP
     361               0 : DOMSVGTransformList::RemoveItem(PRUint32 index, nsIDOMSVGTransform **_retval)
     362                 : {
     363               0 :   *_retval = nsnull;
     364               0 :   if (IsAnimValList()) {
     365               0 :     return NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR;
     366                 :   }
     367                 : 
     368               0 :   if (index >= Length()) {
     369               0 :     return NS_ERROR_DOM_INDEX_SIZE_ERR;
     370                 :   }
     371                 : 
     372               0 :   nsAttrValue emptyOrOldValue = Element()->WillChangeTransformList();
     373                 :   // Now that we know we're removing, keep animVal list in sync as necessary.
     374                 :   // Do this *before* touching InternalList() so the removed item can get its
     375                 :   // internal value.
     376               0 :   MaybeRemoveItemFromAnimValListAt(index);
     377                 : 
     378                 :   // We have to return the removed item, so make sure it exists:
     379               0 :   EnsureItemAt(index);
     380                 : 
     381                 :   // Notify the DOM item of removal *before* modifying the lists so that the
     382                 :   // DOM item can copy its *old* value:
     383               0 :   mItems[index]->RemovingFromList();
     384               0 :   NS_ADDREF(*_retval = mItems[index]);
     385                 : 
     386               0 :   InternalList().RemoveItem(index);
     387               0 :   mItems.RemoveElementAt(index);
     388                 : 
     389               0 :   UpdateListIndicesFromIndex(mItems, index);
     390                 : 
     391               0 :   Element()->DidChangeTransformList(emptyOrOldValue);
     392               0 :   if (mAList->IsAnimating()) {
     393               0 :     Element()->AnimationNeedsResample();
     394                 :   }
     395               0 :   return NS_OK;
     396                 : }
     397                 : 
     398                 : /* nsIDOMSVGTransform appendItem (in nsIDOMSVGTransform newItem); */
     399                 : NS_IMETHODIMP
     400               0 : DOMSVGTransformList::AppendItem(nsIDOMSVGTransform *newItem,
     401                 :                                 nsIDOMSVGTransform **_retval)
     402                 : {
     403               0 :   return InsertItemBefore(newItem, Length(), _retval);
     404                 : }
     405                 : 
     406                 : /* nsIDOMSVGTransform createSVGTransformFromMatrix (in nsIDOMSVGMatrix matrix);
     407                 :  */
     408                 : NS_IMETHODIMP
     409               0 : DOMSVGTransformList::CreateSVGTransformFromMatrix(nsIDOMSVGMatrix *matrix,
     410                 :                                                   nsIDOMSVGTransform **_retval)
     411                 : {
     412               0 :   nsCOMPtr<DOMSVGMatrix> domItem = do_QueryInterface(matrix);
     413               0 :   if (!domItem) {
     414               0 :     return NS_ERROR_DOM_SVG_WRONG_TYPE_ERR;
     415                 :   }
     416                 : 
     417               0 :   NS_ADDREF(*_retval = new DOMSVGTransform(domItem->Matrix()));
     418               0 :   return NS_OK;
     419                 : }
     420                 : 
     421                 : /* nsIDOMSVGTransform consolidate (); */
     422                 : NS_IMETHODIMP
     423               0 : DOMSVGTransformList::Consolidate(nsIDOMSVGTransform **_retval)
     424                 : {
     425               0 :   *_retval = nsnull;
     426               0 :   if (IsAnimValList()) {
     427               0 :     return NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR;
     428                 :   }
     429                 : 
     430               0 :   if (Length() == 0)
     431               0 :     return NS_OK;
     432                 : 
     433                 :   // Note that SVG 1.1 says, "The consolidation operation creates new
     434                 :   // SVGTransform object as the first and only item in the list" hence, even if
     435                 :   // Length() == 1 we can't return that one item (after making it a matrix
     436                 :   // type). We must orphan the existing item and then make a new one.
     437                 : 
     438                 :   // First calculate our matrix
     439               0 :   gfxMatrix mx = InternalList().GetConsolidationMatrix();
     440                 : 
     441                 :   // Then orphan the existing items
     442               0 :   Clear();
     443                 : 
     444                 :   // And append the new transform
     445               0 :   nsRefPtr<DOMSVGTransform> transform = new DOMSVGTransform(mx);
     446               0 :   return InsertItemBefore(transform, Length(), _retval);
     447                 : }
     448                 : 
     449                 : //----------------------------------------------------------------------
     450                 : // Implementation helpers:
     451                 : 
     452                 : void
     453               0 : DOMSVGTransformList::EnsureItemAt(PRUint32 aIndex)
     454                 : {
     455               0 :   if (!mItems[aIndex]) {
     456               0 :     mItems[aIndex] = new DOMSVGTransform(this, aIndex, IsAnimValList());
     457                 :   }
     458               0 : }
     459                 : 
     460                 : void
     461               0 : DOMSVGTransformList::MaybeInsertNullInAnimValListAt(PRUint32 aIndex)
     462                 : {
     463               0 :   NS_ABORT_IF_FALSE(!IsAnimValList(), "call from baseVal to animVal");
     464                 : 
     465               0 :   DOMSVGTransformList* animVal = mAList->mAnimVal;
     466                 : 
     467               0 :   if (!animVal || mAList->IsAnimating()) {
     468                 :     // No animVal list wrapper, or animVal not a clone of baseVal
     469               0 :     return;
     470                 :   }
     471                 : 
     472               0 :   NS_ABORT_IF_FALSE(animVal->mItems.Length() == mItems.Length(),
     473                 :                     "animVal list not in sync!");
     474                 : 
     475                 :   animVal->mItems.InsertElementAt(aIndex,
     476               0 :                                   static_cast<DOMSVGTransform*>(nsnull));
     477                 : 
     478               0 :   UpdateListIndicesFromIndex(animVal->mItems, aIndex + 1);
     479                 : }
     480                 : 
     481                 : void
     482               0 : DOMSVGTransformList::MaybeRemoveItemFromAnimValListAt(PRUint32 aIndex)
     483                 : {
     484               0 :   NS_ABORT_IF_FALSE(!IsAnimValList(), "call from baseVal to animVal");
     485                 : 
     486                 :   // This needs to be a strong reference; otherwise, the RemovingFromList call
     487                 :   // below might drop the last reference to animVal before we're done with it.
     488               0 :   nsRefPtr<DOMSVGTransformList> animVal = mAList->mAnimVal;
     489                 : 
     490               0 :   if (!animVal || mAList->IsAnimating()) {
     491                 :     // No animVal list wrapper, or animVal not a clone of baseVal
     492                 :     return;
     493                 :   }
     494                 : 
     495               0 :   NS_ABORT_IF_FALSE(animVal->mItems.Length() == mItems.Length(),
     496                 :                     "animVal list not in sync!");
     497                 : 
     498               0 :   if (animVal->mItems[aIndex]) {
     499               0 :     animVal->mItems[aIndex]->RemovingFromList();
     500                 :   }
     501               0 :   animVal->mItems.RemoveElementAt(aIndex);
     502                 : 
     503               0 :   UpdateListIndicesFromIndex(animVal->mItems, aIndex);
     504                 : }
     505                 : 
     506            4392 : } // namespace mozilla

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