LCOV - code coverage report
Current view: directory - layout/xul/base/src/tree/src - nsTreeBoxObject.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 283 17 6.0 %
Date: 2012-06-02 Functions: 52 9 17.3 %

       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 Mozilla Communicator client code.
      16                 :  *
      17                 :  * The Initial Developer of the Original Code is
      18                 :  * Netscape Communications Corporation.
      19                 :  * Portions created by the Initial Developer are Copyright (C) 1998
      20                 :  * the Initial Developer. All Rights Reserved.
      21                 :  *
      22                 :  * Contributor(s):
      23                 :  *   Dave Hyatt <hyatt@mozilla.org> (Original Author)
      24                 :  *   Brian Ryner <bryner@brianryner.com>
      25                 :  *   Nate Nielsen <nielsen@memberwebs.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                 : #include "nsTreeBoxObject.h"
      42                 : #include "nsCOMPtr.h"
      43                 : #include "nsIDOMXULElement.h"
      44                 : #include "nsIXULTemplateBuilder.h"
      45                 : #include "nsTreeContentView.h"
      46                 : #include "nsITreeSelection.h"
      47                 : #include "nsChildIterator.h"
      48                 : #include "nsContentUtils.h"
      49                 : #include "nsDOMError.h"
      50                 : #include "nsTreeBodyFrame.h"
      51                 : 
      52            1464 : NS_IMPL_CYCLE_COLLECTION_1(nsTreeBoxObject, mView)
      53                 : 
      54               4 : NS_IMPL_ADDREF_INHERITED(nsTreeBoxObject, nsBoxObject)
      55               4 : NS_IMPL_RELEASE_INHERITED(nsTreeBoxObject, nsBoxObject)
      56                 : 
      57               9 : NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(nsTreeBoxObject)
      58               7 :   NS_INTERFACE_MAP_ENTRY(nsITreeBoxObject)
      59               7 : NS_INTERFACE_MAP_END_INHERITING(nsBoxObject)
      60                 : 
      61                 : void
      62               0 : nsTreeBoxObject::Clear()
      63                 : {
      64               0 :   ClearCachedValues();
      65                 : 
      66                 :   // Drop the view's ref to us.
      67               0 :   if (mView) {
      68               0 :     nsCOMPtr<nsITreeSelection> sel;
      69               0 :     mView->GetSelection(getter_AddRefs(sel));
      70               0 :     if (sel)
      71               0 :       sel->SetTree(nsnull);
      72               0 :     mView->SetTree(nsnull); // Break the circular ref between the view and us.
      73                 :   }
      74               0 :   mView = nsnull;
      75                 : 
      76               0 :   nsBoxObject::Clear();
      77               0 : }
      78                 : 
      79                 : 
      80               1 : nsTreeBoxObject::nsTreeBoxObject()
      81               1 :   : mTreeBody(nsnull)
      82                 : {
      83               1 : }
      84                 : 
      85               2 : nsTreeBoxObject::~nsTreeBoxObject()
      86                 : {
      87                 :   /* destructor code */
      88               4 : }
      89                 : 
      90                 : 
      91               0 : static void FindBodyElement(nsIContent* aParent, nsIContent** aResult)
      92                 : {
      93               0 :   *aResult = nsnull;
      94               0 :   ChildIterator iter, last;
      95               0 :   for (ChildIterator::Init(aParent, &iter, &last); iter != last; ++iter) {
      96               0 :     nsCOMPtr<nsIContent> content = *iter;
      97                 : 
      98               0 :     nsINodeInfo *ni = content->NodeInfo();
      99               0 :     if (ni->Equals(nsGkAtoms::treechildren, kNameSpaceID_XUL)) {
     100               0 :       *aResult = content;
     101               0 :       NS_ADDREF(*aResult);
     102                 :       break;
     103               0 :     } else if (ni->Equals(nsGkAtoms::tree, kNameSpaceID_XUL)) {
     104                 :       // There are nesting tree elements. Only the innermost should
     105                 :       // find the treechilren.
     106                 :       break;
     107               0 :     } else if (content->IsElement() &&
     108               0 :                !ni->Equals(nsGkAtoms::_template, kNameSpaceID_XUL)) {
     109               0 :       FindBodyElement(content, aResult);
     110               0 :       if (*aResult)
     111                 :         break;
     112                 :     }
     113                 :   }
     114               0 : }
     115                 : 
     116                 : nsTreeBodyFrame*
     117               0 : nsTreeBoxObject::GetTreeBody(bool aFlushLayout)
     118                 : {
     119                 :   // Make sure our frames are up to date, and layout as needed.  We
     120                 :   // have to do this before checking for our cached mTreeBody, since
     121                 :   // it might go away on style flush, and in any case if aFlushLayout
     122                 :   // is true we need to make sure to flush no matter what.
     123                 :   // XXXbz except that flushing style when we were not asked to flush
     124                 :   // layout here breaks things.  See bug 585123.
     125                 :   nsIFrame* frame;
     126               0 :   if (aFlushLayout) {
     127               0 :     frame = GetFrame(aFlushLayout);
     128               0 :     if (!frame)
     129               0 :       return nsnull;
     130                 :   }
     131                 : 
     132               0 :   if (mTreeBody) {
     133                 :     // Have one cached already.
     134               0 :     return mTreeBody;
     135                 :   }
     136                 : 
     137               0 :   if (!aFlushLayout) {
     138               0 :     frame = GetFrame(aFlushLayout);
     139               0 :     if (!frame)
     140               0 :       return nsnull;
     141                 :   }
     142                 : 
     143                 :   // Iterate over our content model children looking for the body.
     144               0 :   nsCOMPtr<nsIContent> content;
     145               0 :   FindBodyElement(frame->GetContent(), getter_AddRefs(content));
     146               0 :   if (!content)
     147               0 :     return nsnull;
     148                 : 
     149               0 :   frame = content->GetPrimaryFrame();
     150               0 :   if (!frame)
     151               0 :      return nsnull;
     152                 : 
     153                 :   // Make sure that the treebodyframe has a pointer to |this|.
     154               0 :   nsTreeBodyFrame *treeBody = do_QueryFrame(frame);
     155               0 :   NS_ENSURE_TRUE(treeBody && treeBody->GetTreeBoxObject() == this, nsnull);
     156                 : 
     157               0 :   mTreeBody = treeBody;
     158               0 :   return mTreeBody;
     159                 : }
     160                 : 
     161               0 : NS_IMETHODIMP nsTreeBoxObject::GetView(nsITreeView * *aView)
     162                 : {
     163               0 :   if (!mTreeBody) {
     164               0 :     if (!GetTreeBody()) {
     165                 :       // Don't return an uninitialised view
     166               0 :       *aView = nsnull;
     167               0 :       return NS_OK;
     168                 :     }
     169                 : 
     170               0 :     if (mView)
     171                 :       // Our new frame needs to initialise itself
     172               0 :       return mTreeBody->GetView(aView);
     173                 :   }
     174               0 :   if (!mView) {
     175               0 :     nsCOMPtr<nsIDOMXULElement> xulele = do_QueryInterface(mContent);
     176               0 :     if (xulele) {
     177                 :       // See if there is a XUL tree builder associated with the element
     178               0 :       nsCOMPtr<nsIXULTemplateBuilder> builder;
     179               0 :       xulele->GetBuilder(getter_AddRefs(builder));
     180               0 :       mView = do_QueryInterface(builder);
     181                 : 
     182               0 :       if (!mView) {
     183                 :         // No tree builder, create a tree content view.
     184               0 :         nsresult rv = NS_NewTreeContentView(getter_AddRefs(mView));
     185               0 :         NS_ENSURE_SUCCESS(rv, rv);
     186                 :       }
     187                 : 
     188                 :       // Initialise the frame and view
     189               0 :       mTreeBody->SetView(mView);
     190                 :     }
     191                 :   }
     192               0 :   NS_IF_ADDREF(*aView = mView);
     193               0 :   return NS_OK;
     194                 : }
     195                 : 
     196                 : static bool
     197               0 : CanTrustView(nsISupports* aValue)
     198                 : {
     199                 :   // Untrusted content is only allowed to specify known-good views
     200               0 :   if (nsContentUtils::IsCallerTrustedForWrite())
     201               0 :     return true;
     202               0 :   nsCOMPtr<nsINativeTreeView> nativeTreeView = do_QueryInterface(aValue);
     203               0 :   if (!nativeTreeView || NS_FAILED(nativeTreeView->EnsureNative())) {
     204                 :     // XXX ERRMSG need a good error here for developers
     205               0 :     return false;
     206                 :   }
     207               0 :   return true;
     208                 : }
     209                 : 
     210               0 : NS_IMETHODIMP nsTreeBoxObject::SetView(nsITreeView * aView)
     211                 : {
     212               0 :   if (!CanTrustView(aView))
     213               0 :     return NS_ERROR_DOM_SECURITY_ERR;
     214                 :   
     215               0 :   mView = aView;
     216               0 :   nsTreeBodyFrame* body = GetTreeBody();
     217               0 :   if (body)
     218               0 :     body->SetView(aView);
     219                 : 
     220               0 :   return NS_OK;
     221                 : }
     222                 : 
     223               0 : NS_IMETHODIMP nsTreeBoxObject::GetFocused(bool* aFocused)
     224                 : {
     225               0 :   *aFocused = false;
     226               0 :   nsTreeBodyFrame* body = GetTreeBody();
     227               0 :   if (body)
     228               0 :     return body->GetFocused(aFocused);
     229               0 :   return NS_OK;
     230                 : }
     231                 : 
     232               0 : NS_IMETHODIMP nsTreeBoxObject::SetFocused(bool aFocused)
     233                 : {
     234               0 :   nsTreeBodyFrame* body = GetTreeBody();
     235               0 :   if (body)
     236               0 :     return body->SetFocused(aFocused);
     237               0 :   return NS_OK;
     238                 : }
     239                 : 
     240               0 : NS_IMETHODIMP nsTreeBoxObject::GetTreeBody(nsIDOMElement** aElement)
     241                 : {
     242               0 :   *aElement = nsnull;
     243               0 :   nsTreeBodyFrame* body = GetTreeBody();
     244               0 :   if (body) 
     245               0 :     return body->GetTreeBody(aElement);
     246               0 :   return NS_OK;
     247                 : }
     248                 : 
     249               0 : NS_IMETHODIMP nsTreeBoxObject::GetColumns(nsITreeColumns** aColumns)
     250                 : {
     251               0 :   *aColumns = nsnull;
     252               0 :   nsTreeBodyFrame* body = GetTreeBody();
     253               0 :   if (body) 
     254               0 :     return body->GetColumns(aColumns);
     255               0 :   return NS_OK;
     256                 : }
     257                 : 
     258               0 : NS_IMETHODIMP nsTreeBoxObject::GetRowHeight(PRInt32* aRowHeight)
     259                 : {
     260               0 :   *aRowHeight = 0;
     261               0 :   nsTreeBodyFrame* body = GetTreeBody();
     262               0 :   if (body) 
     263               0 :     return body->GetRowHeight(aRowHeight);
     264               0 :   return NS_OK;
     265                 : }
     266                 : 
     267               0 : NS_IMETHODIMP nsTreeBoxObject::GetRowWidth(PRInt32 *aRowWidth)
     268                 : {
     269               0 :   *aRowWidth = 0;
     270               0 :   nsTreeBodyFrame* body = GetTreeBody();
     271               0 :   if (body) 
     272               0 :     return body->GetRowWidth(aRowWidth);
     273               0 :   return NS_OK;
     274                 : }
     275                 : 
     276               0 : NS_IMETHODIMP nsTreeBoxObject::GetFirstVisibleRow(PRInt32 *aFirstVisibleRow)
     277                 : {
     278               0 :   *aFirstVisibleRow = 0;
     279               0 :   nsTreeBodyFrame* body = GetTreeBody();
     280               0 :   if (body)
     281               0 :     return body->GetFirstVisibleRow(aFirstVisibleRow);
     282               0 :   return NS_OK;
     283                 : }
     284                 : 
     285               0 : NS_IMETHODIMP nsTreeBoxObject::GetLastVisibleRow(PRInt32 *aLastVisibleRow)
     286                 : {
     287               0 :   *aLastVisibleRow = 0;
     288               0 :   nsTreeBodyFrame* body = GetTreeBody();
     289               0 :   if (body)
     290               0 :     return body->GetLastVisibleRow(aLastVisibleRow);
     291               0 :   return NS_OK;
     292                 : }
     293                 : 
     294               0 : NS_IMETHODIMP nsTreeBoxObject::GetHorizontalPosition(PRInt32 *aHorizontalPosition)
     295                 : {
     296               0 :   *aHorizontalPosition = 0;
     297               0 :   nsTreeBodyFrame* body = GetTreeBody();
     298               0 :   if (body)
     299               0 :     return body->GetHorizontalPosition(aHorizontalPosition);
     300               0 :   return NS_OK;
     301                 : }
     302                 : 
     303               0 : NS_IMETHODIMP nsTreeBoxObject::GetPageLength(PRInt32 *aPageLength)
     304                 : {
     305               0 :   *aPageLength = 0;
     306               0 :   nsTreeBodyFrame* body = GetTreeBody();
     307               0 :   if (body)
     308               0 :     return body->GetPageLength(aPageLength);
     309               0 :   return NS_OK;
     310                 : }
     311                 : 
     312               0 : NS_IMETHODIMP nsTreeBoxObject::GetSelectionRegion(nsIScriptableRegion **aRegion)
     313                 : {
     314               0 :  *aRegion = nsnull;
     315               0 :   nsTreeBodyFrame* body = GetTreeBody();
     316               0 :   if (body)
     317               0 :     return body->GetSelectionRegion(aRegion);
     318               0 :   return NS_OK;
     319                 : }
     320                 : 
     321                 : NS_IMETHODIMP
     322               0 : nsTreeBoxObject::EnsureRowIsVisible(PRInt32 aRow)
     323                 : {
     324               0 :   nsTreeBodyFrame* body = GetTreeBody();
     325               0 :   if (body)
     326               0 :     return body->EnsureRowIsVisible(aRow);
     327               0 :   return NS_OK;
     328                 : }
     329                 : 
     330                 : NS_IMETHODIMP 
     331               0 : nsTreeBoxObject::EnsureCellIsVisible(PRInt32 aRow, nsITreeColumn* aCol)
     332                 : {
     333               0 :   nsTreeBodyFrame* body = GetTreeBody();
     334               0 :   if (body)
     335               0 :     return body->EnsureCellIsVisible(aRow, aCol);
     336               0 :   return NS_OK;
     337                 :     return NS_ERROR_NOT_IMPLEMENTED;
     338                 : }
     339                 : 
     340                 : NS_IMETHODIMP
     341               0 : nsTreeBoxObject::ScrollToRow(PRInt32 aRow)
     342                 : {
     343               0 :   nsTreeBodyFrame* body = GetTreeBody(true);
     344               0 :   if (body)
     345               0 :     return body->ScrollToRow(aRow);
     346               0 :   return NS_OK;
     347                 : }
     348                 : 
     349                 : NS_IMETHODIMP
     350               0 : nsTreeBoxObject::ScrollByLines(PRInt32 aNumLines)
     351                 : {
     352               0 :   nsTreeBodyFrame* body = GetTreeBody();
     353               0 :   if (body)
     354               0 :     return body->ScrollByLines(aNumLines);
     355               0 :   return NS_OK;
     356                 : }
     357                 : 
     358                 : NS_IMETHODIMP
     359               0 : nsTreeBoxObject::ScrollByPages(PRInt32 aNumPages)
     360                 : {
     361               0 :   nsTreeBodyFrame* body = GetTreeBody();
     362               0 :   if (body)
     363               0 :     return body->ScrollByPages(aNumPages);
     364               0 :   return NS_OK;
     365                 : }
     366                 : 
     367                 : NS_IMETHODIMP 
     368               0 : nsTreeBoxObject::ScrollToCell(PRInt32 aRow, nsITreeColumn* aCol)
     369                 : {
     370               0 :   nsTreeBodyFrame* body = GetTreeBody();
     371               0 :   if (body)
     372               0 :     return body->ScrollToCell(aRow, aCol);
     373               0 :   return NS_OK;
     374                 : }
     375                 : 
     376                 : NS_IMETHODIMP 
     377               0 : nsTreeBoxObject::ScrollToColumn(nsITreeColumn* aCol)
     378                 : {
     379               0 :   nsTreeBodyFrame* body = GetTreeBody();
     380               0 :   if (body)
     381               0 :     return body->ScrollToColumn(aCol);
     382               0 :   return NS_OK;
     383                 : }
     384                 : 
     385                 : NS_IMETHODIMP 
     386               0 : nsTreeBoxObject::ScrollToHorizontalPosition(PRInt32 aHorizontalPosition)
     387                 : {
     388               0 :   nsTreeBodyFrame* body = GetTreeBody();
     389               0 :   if (body)
     390               0 :     return body->ScrollToHorizontalPosition(aHorizontalPosition);
     391               0 :   return NS_OK;
     392                 : }
     393                 : 
     394               0 : NS_IMETHODIMP nsTreeBoxObject::Invalidate()
     395                 : {
     396               0 :   nsTreeBodyFrame* body = GetTreeBody();
     397               0 :   if (body)
     398               0 :     return body->Invalidate();
     399               0 :   return NS_OK;
     400                 : }
     401                 : 
     402               0 : NS_IMETHODIMP nsTreeBoxObject::InvalidateColumn(nsITreeColumn* aCol)
     403                 : {
     404               0 :   nsTreeBodyFrame* body = GetTreeBody();
     405               0 :   if (body)
     406               0 :     return body->InvalidateColumn(aCol);
     407               0 :   return NS_OK;
     408                 : }
     409                 : 
     410               0 : NS_IMETHODIMP nsTreeBoxObject::InvalidateRow(PRInt32 aIndex)
     411                 : {
     412               0 :   nsTreeBodyFrame* body = GetTreeBody();
     413               0 :   if (body)
     414               0 :     return body->InvalidateRow(aIndex);
     415               0 :   return NS_OK;
     416                 : }
     417                 : 
     418               0 : NS_IMETHODIMP nsTreeBoxObject::InvalidateCell(PRInt32 aRow, nsITreeColumn* aCol)
     419                 : {
     420               0 :   nsTreeBodyFrame* body = GetTreeBody();
     421               0 :   if (body)
     422               0 :     return body->InvalidateCell(aRow, aCol);
     423               0 :   return NS_OK;
     424                 : }
     425                 : 
     426               0 : NS_IMETHODIMP nsTreeBoxObject::InvalidateRange(PRInt32 aStart, PRInt32 aEnd)
     427                 : {
     428               0 :   nsTreeBodyFrame* body = GetTreeBody();
     429               0 :   if (body)
     430               0 :     return body->InvalidateRange(aStart, aEnd);
     431               0 :   return NS_OK;
     432                 : }
     433                 : 
     434               0 : NS_IMETHODIMP nsTreeBoxObject::InvalidateColumnRange(PRInt32 aStart, PRInt32 aEnd, nsITreeColumn* aCol)
     435                 : {
     436               0 :   nsTreeBodyFrame* body = GetTreeBody();
     437               0 :   if (body)
     438               0 :     return body->InvalidateColumnRange(aStart, aEnd, aCol);
     439               0 :   return NS_OK;
     440                 : }
     441                 : 
     442               0 : NS_IMETHODIMP nsTreeBoxObject::GetRowAt(PRInt32 x, PRInt32 y, PRInt32 *aRow)
     443                 : {
     444               0 :   *aRow = 0;
     445               0 :   nsTreeBodyFrame* body = GetTreeBody();
     446               0 :   if (body)
     447               0 :     return body->GetRowAt(x, y, aRow);
     448               0 :   return NS_OK;
     449                 : }
     450                 : 
     451               0 : NS_IMETHODIMP nsTreeBoxObject::GetCellAt(PRInt32 aX, PRInt32 aY, PRInt32 *aRow, nsITreeColumn** aCol,
     452                 :                                          nsACString& aChildElt)
     453                 : {
     454               0 :   *aRow = 0;
     455               0 :   *aCol = nsnull;
     456               0 :   nsTreeBodyFrame* body = GetTreeBody();
     457               0 :   if (body)
     458               0 :     return body->GetCellAt(aX, aY, aRow, aCol, aChildElt);
     459               0 :   return NS_OK;
     460                 : }
     461                 : 
     462                 : NS_IMETHODIMP
     463               0 : nsTreeBoxObject::GetCoordsForCellItem(PRInt32 aRow, nsITreeColumn* aCol, const nsACString& aElement, 
     464                 :                                       PRInt32 *aX, PRInt32 *aY, PRInt32 *aWidth, PRInt32 *aHeight)
     465                 : {
     466               0 :   *aX = *aY = *aWidth = *aHeight = 0;
     467               0 :   nsTreeBodyFrame* body = GetTreeBody();
     468               0 :   if (body)
     469               0 :     return body->GetCoordsForCellItem(aRow, aCol, aElement, aX, aY, aWidth, aHeight);
     470               0 :   return NS_OK;
     471                 : }
     472                 : 
     473                 : NS_IMETHODIMP
     474               0 : nsTreeBoxObject::IsCellCropped(PRInt32 aRow, nsITreeColumn* aCol, bool *aIsCropped)
     475                 : {  
     476               0 :   *aIsCropped = false;
     477               0 :   nsTreeBodyFrame* body = GetTreeBody();
     478               0 :   if (body)
     479               0 :     return body->IsCellCropped(aRow, aCol, aIsCropped);
     480               0 :   return NS_OK;
     481                 : }
     482                 : 
     483               0 : NS_IMETHODIMP nsTreeBoxObject::RowCountChanged(PRInt32 aIndex, PRInt32 aDelta)
     484                 : {
     485               0 :   nsTreeBodyFrame* body = GetTreeBody();
     486               0 :   if (body)
     487               0 :     return body->RowCountChanged(aIndex, aDelta);
     488               0 :   return NS_OK;
     489                 : }
     490                 : 
     491               0 : NS_IMETHODIMP nsTreeBoxObject::BeginUpdateBatch()
     492                 : {
     493               0 :   nsTreeBodyFrame* body = GetTreeBody();
     494               0 :   if (body)
     495               0 :     return body->BeginUpdateBatch();
     496               0 :   return NS_OK;
     497                 : }
     498                 : 
     499               0 : NS_IMETHODIMP nsTreeBoxObject::EndUpdateBatch()
     500                 : {
     501               0 :   nsTreeBodyFrame* body = GetTreeBody();
     502               0 :   if (body)
     503               0 :     return body->EndUpdateBatch();
     504               0 :   return NS_OK;
     505                 : }
     506                 : 
     507               0 : NS_IMETHODIMP nsTreeBoxObject::ClearStyleAndImageCaches()
     508                 : {
     509               0 :   nsTreeBodyFrame* body = GetTreeBody();
     510               0 :   if (body)
     511               0 :     return body->ClearStyleAndImageCaches();
     512               0 :   return NS_OK;
     513                 : }
     514                 : 
     515                 : void
     516               0 : nsTreeBoxObject::ClearCachedValues()
     517                 : {
     518               0 :   mTreeBody = nsnull;
     519               0 : }    
     520                 : 
     521                 : // Creation Routine ///////////////////////////////////////////////////////////////////////
     522                 : 
     523                 : nsresult
     524               1 : NS_NewTreeBoxObject(nsIBoxObject** aResult)
     525                 : {
     526               1 :   *aResult = new nsTreeBoxObject;
     527               1 :   if (!*aResult)
     528               0 :     return NS_ERROR_OUT_OF_MEMORY;
     529               1 :   NS_ADDREF(*aResult);
     530               1 :   return NS_OK;
     531            4392 : }
     532                 : 

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