Resolves: tdf#81806 crash on certain table paste+undo+page cycles

Undo of a delete always leaves a pam that points to the start of the undone
area and a mark to the end of the undone area, even if that area is empty. (In
the normal where there is a selection this can be seen by selecting something,
deleting it, and undoing and the newly undeleted stuff is again selected)

The table overwrite/paste thing looks to see if a mark is set and goes off to
"do something very complex" if its set. So if after each undo cycle, you
physically click at the point where the cursor is flashing (which clears the
mark) and then paste, undo, *click*, paste you get a wonderfully stable
experience.

It seems reasonable to me to "do the simple thing" if there is no mark, or if
the mark and point are the same, i.e. there is nothing actually selected by the
PaM.

Change-Id: Ib451090f3863fde41209cc1fc9cfa0c747d0be58

1 files changed, 6 insertions, 1 deletions

diff --git a/sw/source/core/frmedt/fecopy.cxx b/sw/source/core/frmedt/fecopy.cxx
index 612f63194718..d6dac4460037 100644
--- a/sw/source/core/frmedt/fecopy.cxx
+++ b/sw/source/core/frmedt/fecopy.cxx
@@ -667,6 +667,11 @@ namespace {
     typedef boost::shared_ptr<SwPaM> PaMPtr;
     typedef boost::shared_ptr<SwPosition> PositionPtr;
     typedef std::pair< PaMPtr, PositionPtr > Insertion;
+
+    bool PamHasSelection(const SwPaM& rPaM)
+    {
+        return rPaM.HasMark() && *rPaM.GetPoint() != *rPaM.GetMark();
+    }
 }
 
 bool SwFEShell::Paste( SwDoc* pClpDoc, bool bIncludingPageFrames )
@@ -839,7 +844,7 @@ bool SwFEShell::Paste( SwDoc* pClpDoc, bool bIncludingPageFrames )
                     ParkTableCrsr();
                     bParkTableCrsr = true;
                 }
-                else if( !rPaM.HasMark() && rPaM.GetNext() == &rPaM &&
+                else if( !PamHasSelection(rPaM) && rPaM.GetNext() == &rPaM &&
                      ( !pSrcNd->GetTable().IsTableComplex() ||
                        pDestNd->GetTable().IsNewModel() ) )
                 {