[Libreoffice] [REVIEW] fdo#40701 Base crashes when "Find Record" button is clicked

[Eike Rathke]

Hi Lionel,

On Monday, 2011-09-12 00:25:51 +0200, Lionel Elie Mamane wrote:

> 0001-fdo-40701-DbGridControl-RemoveColumn-even-if-no-corr.patch
> fixes the root cause of the bug, which caused
> void DbGridControl::EnableHandle(sal_Bool bEnable)
> {
>     RemoveColumn(0);
>     m_bHandle = bEnable;
>     InsertHandleColumn();
> }
> to misfunction: RemoveColumn(0) silently did not remove the column, so
> the call to InsertHandleColumn() added a second Handle Column, which
> confused the code in other places.

Hmm.. this

@@ -1723,11 +1723,12 @@ sal_uInt16 DbGridControl::AppendColumn(const XubString& rName, sal_uInt16 nWidth
 void DbGridControl::RemoveColumn(sal_uInt16 nId)
 {
     sal_uInt16 nIndex = GetModelColumnPos(nId);
-    if (nIndex == GRID_COLUMN_NOT_FOUND)
-        return;
 
     DbGridControl_Base::RemoveColumn(nId);
 
+    if (nIndex == GRID_COLUMN_NOT_FOUND)
+        return;
+
     delete m_aColumns[ nIndex ];
     DbGridColumns::iterator it = m_aColumns.begin();
     ::std::advance( it, nIndex );


now attempts to unconditionally remove any column nId. I don't know if
and how the underlying code handles such cases, but a safer approach
would be to still check for a valid index and additionally the handle
column case, so

    if (nIndex != GRID_COLUMN_NOT_FOUND || nId == 0)
        DbGridControl_Base::RemoveColumn(nId);

might be better suited.

  Eike

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