LCOV - code coverage report
Current view: directory - layout/xul/base/src - nsListBoxObject.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 100 0 0.0 %
Date: 2012-06-02 Functions: 19 0 0.0 %

       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 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                 :  *   David W. Hyatt (hyatt@netscape.com) (Original Author)
      24                 :  *   Joe Hewitt (hewitt@netscape.com)
      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 "nsCOMPtr.h"
      41                 : #include "nsPIListBoxObject.h"
      42                 : #include "nsBoxObject.h"
      43                 : #include "nsIFrame.h"
      44                 : #include "nsIDocument.h"
      45                 : #include "nsBindingManager.h"
      46                 : #include "nsIDOMElement.h"
      47                 : #include "nsIDOMNodeList.h"
      48                 : #include "nsGkAtoms.h"
      49                 : #include "nsIScrollableFrame.h"
      50                 : #include "nsListBoxBodyFrame.h"
      51                 : 
      52                 : class nsListBoxObject : public nsPIListBoxObject, public nsBoxObject
      53               0 : {
      54                 : public:
      55                 :   NS_DECL_ISUPPORTS_INHERITED
      56                 :   NS_DECL_NSILISTBOXOBJECT
      57                 : 
      58                 :   // nsPIListBoxObject
      59                 :   virtual nsListBoxBodyFrame* GetListBoxBody(bool aFlush);
      60                 : 
      61                 :   nsListBoxObject();
      62                 : 
      63                 :   // nsPIBoxObject
      64                 :   virtual void Clear();
      65                 :   virtual void ClearCachedValues();
      66                 :   
      67                 : protected:
      68                 :   nsListBoxBodyFrame *mListBoxBody;
      69                 : };
      70                 : 
      71               0 : NS_IMPL_ISUPPORTS_INHERITED2(nsListBoxObject, nsBoxObject, nsIListBoxObject,
      72                 :                              nsPIListBoxObject)
      73                 : 
      74               0 : nsListBoxObject::nsListBoxObject()
      75               0 :   : mListBoxBody(nsnull)
      76                 : {
      77               0 : }
      78                 : 
      79                 : //////////////////////////////////////////////////////////////////////////
      80                 : //// nsIListBoxObject
      81                 : 
      82                 : NS_IMETHODIMP
      83               0 : nsListBoxObject::GetRowCount(PRInt32 *aResult)
      84                 : {
      85               0 :   nsListBoxBodyFrame* body = GetListBoxBody(true);
      86               0 :   if (body)
      87               0 :     return body->GetRowCount(aResult);
      88               0 :   return NS_OK;
      89                 : }
      90                 : 
      91                 : NS_IMETHODIMP
      92               0 : nsListBoxObject::GetNumberOfVisibleRows(PRInt32 *aResult)
      93                 : {
      94               0 :   nsListBoxBodyFrame* body = GetListBoxBody(true);
      95               0 :   if (body)
      96               0 :     return body->GetNumberOfVisibleRows(aResult);
      97               0 :   return NS_OK;
      98                 : }
      99                 : 
     100                 : NS_IMETHODIMP
     101               0 : nsListBoxObject::GetIndexOfFirstVisibleRow(PRInt32 *aResult)
     102                 : {
     103               0 :   nsListBoxBodyFrame* body = GetListBoxBody(true);
     104               0 :   if (body)
     105               0 :     return body->GetIndexOfFirstVisibleRow(aResult);
     106               0 :   return NS_OK;
     107                 : }
     108                 : 
     109               0 : NS_IMETHODIMP nsListBoxObject::EnsureIndexIsVisible(PRInt32 aRowIndex)
     110                 : {
     111               0 :   nsListBoxBodyFrame* body = GetListBoxBody(true);
     112               0 :   if (body)
     113               0 :     return body->EnsureIndexIsVisible(aRowIndex);
     114               0 :   return NS_OK;
     115                 : }
     116                 : 
     117                 : NS_IMETHODIMP
     118               0 : nsListBoxObject::ScrollToIndex(PRInt32 aRowIndex)
     119                 : {
     120               0 :   nsListBoxBodyFrame* body = GetListBoxBody(true);
     121               0 :   if (body)
     122               0 :     return body->ScrollToIndex(aRowIndex);
     123               0 :   return NS_OK;
     124                 : }
     125                 : 
     126                 : NS_IMETHODIMP
     127               0 : nsListBoxObject::ScrollByLines(PRInt32 aNumLines)
     128                 : {
     129               0 :   nsListBoxBodyFrame* body = GetListBoxBody(true);
     130               0 :   if (body)
     131               0 :     return body->ScrollByLines(aNumLines);
     132               0 :   return NS_OK;
     133                 : }
     134                 : 
     135                 : NS_IMETHODIMP
     136               0 : nsListBoxObject::GetItemAtIndex(PRInt32 index, nsIDOMElement **_retval)
     137                 : {
     138               0 :   nsListBoxBodyFrame* body = GetListBoxBody(true);
     139               0 :   if (body)
     140               0 :     return body->GetItemAtIndex(index, _retval);
     141               0 :   return NS_OK;
     142                 : }
     143                 : 
     144                 : NS_IMETHODIMP
     145               0 : nsListBoxObject::GetIndexOfItem(nsIDOMElement* aElement, PRInt32 *aResult)
     146                 : {
     147               0 :   *aResult = 0;
     148                 : 
     149               0 :   nsListBoxBodyFrame* body = GetListBoxBody(true);
     150               0 :   if (body)
     151               0 :     return body->GetIndexOfItem(aElement, aResult);
     152               0 :   return NS_OK;
     153                 : }
     154                 : 
     155                 : //////////////////////
     156                 : 
     157                 : static void
     158               0 : FindBodyContent(nsIContent* aParent, nsIContent** aResult)
     159                 : {
     160               0 :   if (aParent->Tag() == nsGkAtoms::listboxbody) {
     161               0 :     *aResult = aParent;
     162               0 :     NS_IF_ADDREF(*aResult);
     163                 :   }
     164                 :   else {
     165               0 :     nsCOMPtr<nsIDOMNodeList> kids;
     166               0 :     aParent->OwnerDoc()->BindingManager()->GetXBLChildNodesFor(aParent, getter_AddRefs(kids));
     167               0 :     if (!kids) return;
     168                 : 
     169                 :     PRUint32 i;
     170               0 :     kids->GetLength(&i);
     171                 :     // start from the end, cuz we're smart and we know the listboxbody is probably at the end
     172               0 :     while (i > 0) {
     173               0 :       nsCOMPtr<nsIDOMNode> childNode;
     174               0 :       kids->Item(--i, getter_AddRefs(childNode));
     175               0 :       nsCOMPtr<nsIContent> childContent(do_QueryInterface(childNode));
     176               0 :       FindBodyContent(childContent, aResult);
     177               0 :       if (*aResult)
     178                 :         break;
     179                 :     }
     180                 :   }
     181                 : }
     182                 : 
     183                 : nsListBoxBodyFrame*
     184               0 : nsListBoxObject::GetListBoxBody(bool aFlush)
     185                 : {
     186               0 :   if (mListBoxBody) {
     187               0 :     return mListBoxBody;
     188                 :   }
     189                 : 
     190               0 :   nsIPresShell* shell = GetPresShell(false);
     191               0 :   if (!shell) {
     192               0 :     return nsnull;
     193                 :   }
     194                 : 
     195                 :   nsIFrame* frame = aFlush ? 
     196               0 :                       GetFrame(false) /* does Flush_Frames */ :
     197               0 :                       mContent->GetPrimaryFrame();
     198               0 :   if (!frame)
     199               0 :     return nsnull;
     200                 : 
     201                 :   // Iterate over our content model children looking for the body.
     202               0 :   nsCOMPtr<nsIContent> content;
     203               0 :   FindBodyContent(frame->GetContent(), getter_AddRefs(content));
     204                 : 
     205               0 :   if (!content)
     206               0 :     return nsnull;
     207                 : 
     208                 :   // this frame will be a nsGFXScrollFrame
     209               0 :   frame = content->GetPrimaryFrame();
     210               0 :   if (!frame)
     211               0 :      return nsnull;
     212               0 :   nsIScrollableFrame* scrollFrame = do_QueryFrame(frame);
     213               0 :   if (!scrollFrame)
     214               0 :     return nsnull;
     215                 : 
     216                 :   // this frame will be the one we want
     217               0 :   nsIFrame* yeahBaby = scrollFrame->GetScrolledFrame();
     218               0 :   if (!yeahBaby)
     219               0 :      return nsnull;
     220                 : 
     221                 :   // It's a frame. Refcounts are irrelevant.
     222               0 :   nsListBoxBodyFrame* listBoxBody = do_QueryFrame(yeahBaby);
     223               0 :   NS_ENSURE_TRUE(listBoxBody &&
     224                 :                  listBoxBody->SetBoxObject(this),
     225                 :                  nsnull);
     226               0 :   mListBoxBody = listBoxBody;
     227               0 :   return mListBoxBody;
     228                 : }
     229                 : 
     230                 : void
     231               0 : nsListBoxObject::Clear()
     232                 : {
     233               0 :   ClearCachedValues();
     234                 : 
     235               0 :   nsBoxObject::Clear();
     236               0 : }
     237                 : 
     238                 : void
     239               0 : nsListBoxObject::ClearCachedValues()
     240                 : {
     241               0 :   mListBoxBody = nsnull;
     242               0 : }
     243                 : 
     244                 : // Creation Routine ///////////////////////////////////////////////////////////////////////
     245                 : 
     246                 : nsresult
     247               0 : NS_NewListBoxObject(nsIBoxObject** aResult)
     248                 : {
     249               0 :   *aResult = new nsListBoxObject;
     250               0 :   if (!*aResult)
     251               0 :     return NS_ERROR_OUT_OF_MEMORY;
     252               0 :   NS_ADDREF(*aResult);
     253               0 :   return NS_OK;
     254                 : }

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