tdf#137335 calculate paragraph height in RTF/DOCX

TabStops and spaces are not included in height calculation of paragraphs in Word.
With a compatibility option this is now also set in RTF import.
But if spaces or/or tabstops are the only parts of a line their font size
is taken into account.
The fix 89e7341025b607491c90efdb74708e63d875c1e5%5E%21 from tdf#142404
has been removed because it broke formatting of follow lines.

Change-Id: Id28488438462114bd54c4f8bd15e2ada606c4192
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/168788
Tested-by: Jenkins
Reviewed-by: Thorsten Behrens <thorsten.behrens@allotropia.de>

sw/source/core/text/itrform2.cxx

@@ -891,7 +891,7 @@ void SwTextFormatter::CalcAscent( SwTextFormatInfo &rInf, SwLinePortion *pPor )
         {
             pPor->SetHangingBaseline( rInf.GetHangingBaseline() );
             pPor->SetAscent( rInf.GetAscent()  );
-            pPor->Height( rInf.GetTextHeight() );
+            pPor->Height(rInf.GetTextHeight());
             bCalc = true;
         }
         else

sw/source/core/text/porlay.cxx

@@ -400,6 +400,12 @@ void SwLineLayout::CalcLine( SwTextFormatter &rLine, SwTextFormatInfo &rInf )
 
     bool bHasBlankPortion = false;
     bool bHasOnlyBlankPortions = true;
+    bool bHasTabPortions = false;
+    bool bHasNonBlankPortions = false;
+    SwTwips nTabPortionAscent = 0;
+    SwTwips nTabPortionHeight = 0;
+    SwTwips nSpacePortionAscent = 0;
+    SwTwips nSpacePortionHeight = 0;
     bool bHasFlyPortion = false;
 
     if( mpNextPortion )
@@ -452,15 +458,40 @@ void SwLineLayout::CalcLine( SwTextFormatter &rLine, SwTextFormatInfo &rInf )
                 AddPrtWidth( pPos->Width() );
 
                 // #i3952#
-                if (bIgnoreBlanksAndTabsForLineHeightCalculation && !rInf.GetLineStart())
+                if (bIgnoreBlanksAndTabsForLineHeightCalculation)
                 {
+                    bHasTabPortions |= pPos->InTabGrp();
+                    bool isSpacePortion = false;
                     if ( pPos->InTabGrp() || pPos->IsHolePortion() ||
                             ( pPos->IsTextPortion() &&
-                              lcl_HasOnlyBlanks( rInf.GetText(), nPorSttIdx, nPorSttIdx + pPos->GetLen() ) ) )
+                              (isSpacePortion = lcl_HasOnlyBlanks( rInf.GetText(), nPorSttIdx, nPorSttIdx + pPos->GetLen() ) ) ) )
                     {
                         pLast = pPos;
+                        if (pPos->InTabGrp())
+                        {
+                            if (nTabPortionAscent < pPos->GetAscent())
+                            {
+                                nTabPortionAscent = pPos->GetAscent();
+                            }
+                            if (nTabPortionHeight < pPos->Height())
+                            {
+                                nTabPortionHeight = pPos->Height();
+                            }
+                        }
+                        else if (isSpacePortion)
+                        {
+                            if (nSpacePortionAscent < pPos->GetAscent())
+                            {
+                                nSpacePortionAscent = pPos->GetAscent();
+                            }
+                            if (nSpacePortionHeight < pPos->Height())
+                            {
+                                nSpacePortionHeight = pPos->Height();
+                            }
+                            bHasBlankPortion = true;
+                        }
+                        bTmpDummy &= !pPos->InTabGrp();
                         pPos = pPos->GetNextPortion();
-                        bHasBlankPortion = true;
                         continue;
                     }
                 }
@@ -476,6 +507,7 @@ void SwLineLayout::CalcLine( SwTextFormatter &rLine, SwTextFormatInfo &rInf )
                 }
 
                 bHasOnlyBlankPortions = false;
+                bHasNonBlankPortions = true;
 
                 // We had an attribute change: Sum up/build maxima of length and mass
 
@@ -651,8 +683,25 @@ void SwLineLayout::CalcLine( SwTextFormatter &rLine, SwTextFormatInfo &rInf )
         }
     }
 
+    if (bIgnoreBlanksAndTabsForLineHeightCalculation && !bHasNonBlankPortions &&
+        (bHasTabPortions || (bHasBlankPortion && (nSpacePortionAscent > 0 || nSpacePortionHeight > 0))))
+    {
+        //Word increases line height if _only_ spaces and|or tabstops are in a line
+        if (bHasTabPortions)
+        {
+            mnAscent = nTabPortionAscent;
+            Height(nTabPortionHeight, true);
+        }
+        else if (bHasBlankPortion)
+        {
+            if(  mnAscent < nSpacePortionAscent )
+                mnAscent = nSpacePortionAscent;
+            if (!bHasTabPortions || Height() < nSpacePortionHeight)
+                Height(nSpacePortionHeight, true);
+        }
+    }
     // #i3952# Whitespace does not increase line height
-    if ( bHasBlankPortion && bHasOnlyBlankPortions )
+    else if (bHasBlankPortion && bHasOnlyBlankPortions)
     {
         sal_uInt16 nTmpAscent = GetAscent();
         sal_uInt16 nTmpHeight = Height();

sw/source/writerfilter/dmapper/DomainMapper.cxx

@@ -150,6 +150,7 @@ DomainMapper::DomainMapper( const uno::Reference< uno::XComponentContext >& xCon
         //paint background frames after header/footer when anchored in body
         m_pImpl->SetDocumentSettingsProperty(u"PaintHellOverHeaderFooter"_ustr,uno::Any(true));
         m_pImpl->SetDocumentSettingsProperty(u"EmptyDbFieldHidesPara"_ustr,uno::Any(false));
+        m_pImpl->SetDocumentSettingsProperty(u"IgnoreTabsAndBlanksForLineCalculation"_ustr,uno::Any(true));
     }
 
     // Initialize RDF metadata, to be able to add statements during the import.