forcepoint#96 sw: delete fieldmarks in DelFullPara()

The problem is that CorrAbs() will move any position of a fieldmark
that's in the deleted SwTextNodes to a different node that doesn't have
the CH_TXT_ATR_FIELD*.

Then it will inevitably crash later when it can't find its chars.

The other problem is that if there's only a CH_TXT_ATR_FIELDSEP in the
deleted nodes, that fieldmark would then be missing it.

Just delete fieldmarks with positions in deleted nodes, that should work
fine for the usual cases where DelFullPara() is called.

Change-Id: I8dfac9a315d74025dbe1ed5ccb95b7c9121fb569
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/132379
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolanm@redhat.com>

1 files changed, 31 insertions, 0 deletions

diff --git a/sw/source/core/doc/DocumentContentOperationsManager.cxx b/sw/source/core/doc/DocumentContentOperationsManager.cxx
index c9f15ad54226..11f91cfe38b5 100644
--- a/sw/source/core/doc/DocumentContentOperationsManager.cxx
+++ b/sw/source/core/doc/DocumentContentOperationsManager.cxx
@@ -2255,6 +2255,37 @@ bool DocumentContentOperationsManager::DelFullPara( SwPaM& rPam )
                 return false;
             }
         }
+
+        // must delete all fieldmarks before CorrAbs(), or they'll remain
+        // moved to wrong node without their CH_TXT_ATR_FIELD*
+        // (note: deleteMarks() doesn't help here, in case of partially
+        // selected fieldmarks; let's delete these as re-inserting their chars
+        // elsewhere looks difficult)
+        ::std::set<::sw::mark::IFieldmark*> fieldmarks;
+        for (SwNodeIndex i = aRg.aStart; i <= aRg.aEnd; ++i)
+        {
+            if (SwTextNode *const pTextNode = i.GetNode().GetTextNode())
+            {
+                for (sal_Int32 j = 0; j < pTextNode->GetText().getLength(); ++j)
+                {
+                    switch (pTextNode->GetText()[j])
+                    {
+                        case CH_TXT_ATR_FIELDSTART:
+                        case CH_TXT_ATR_FIELDEND:
+                            fieldmarks.insert(m_rDoc.getIDocumentMarkAccess()->getFieldmarkAt(SwPosition(*pTextNode, j)));
+                        break;
+                        case CH_TXT_ATR_FIELDSEP:
+                            fieldmarks.insert(m_rDoc.getIDocumentMarkAccess()->getFieldmarkFor(SwPosition(*pTextNode, j)));
+                        break;
+                    }
+                }
+            }
+        }
+        for (auto const pFieldMark : fieldmarks)
+        {
+            m_rDoc.getIDocumentMarkAccess()->deleteMark(pFieldMark);
+        }
+
         // move bookmarks, redlines etc.
         if (aRg.aStart == aRg.aEnd) // only first CorrAbs variant handles this
         {