tdf#106190 fix left alignment of denominator

The bug was introduced with left aligment of denominator.
Non feasable denominators were not tested and create infinite loop
while inserting and removing the same space.

This patch detects
- if denominator starts just after fraction bar.
  Otherwise, format is faulty.
- if a non digit is detected in the denominator,
  next part of format is treated as text
This patch is changing behavior of some formats:
"# ?/foo??" is treated as faulty format while it was considered as valid
"# ?/??E?" is treated with 2 digits in denominator and "E?" at the end,
 while it was considered as faulty

Change-Id: I0379a398dff79b6e21a44776c0d4356d066cdeab
Reviewed-on: https://gerrit.libreoffice.org/34659
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Eike Rathke <erack@redhat.com>
(cherry picked from commit b2738c6f67cb650ac32228f3cd20b9dfe4b41c9c)
Reviewed-on: https://gerrit.libreoffice.org/34825
(cherry picked from commit 5be9863007d28ce543b0030ffef4c7d955a8e283)

3 files changed, 35 insertions, 13 deletions

diff --git a/svl/source/numbers/zformat.cxx b/svl/source/numbers/zformat.cxx
index ac0c6080ee4c..09e024eaccac 100644
--- a/svl/source/numbers/zformat.cxx
+++ b/svl/source/numbers/zformat.cxx
@@ -2815,9 +2815,9 @@ bool SvNumberformat::ImpGetFractionOutput(double fNumber,
     sal_Int32 k;           // Denominator
 
     bRes |= ImpNumberFill(sDiv, fNumber, k, j, nIx, NF_SYMBOLTYPE_FRAC);
-    if ( !bHideFraction )
+    if ( !bHideFraction &&  sDenominatorFormat.getLength() > 0 )
     {
-        while ( sDiv[0] == ' ' )
+        while ( sDiv[0] == ' ' ) // left align denominator
         {
             sDiv.insert( sDenominatorFormat.getLength(), " " );
             sDiv.remove( 0, 1 );
diff --git a/svl/source/numbers/zforscan.cxx b/svl/source/numbers/zforscan.cxx
index 0542cf34c134..5529dcc29462 100644
--- a/svl/source/numbers/zforscan.cxx
+++ b/svl/source/numbers/zforscan.cxx
@@ -1079,6 +1079,7 @@ void ImpSvNumberformatScan::Reset()
     nCntExp = 0;
     bFrac = false;
     bBlank = false;
+    bDenomin = false;
     nNatNumModifier = 0;
 }
 
@@ -1666,6 +1667,8 @@ sal_Int32 ImpSvNumberformatScan::FinalScan( OUString& rString )
                     }
                     else if ( sStrArray[i][0] == ' ' )
                         nTypeArray[i] = NF_SYMBOLTYPE_FRACBLANK;
+                    else if ( bFrac )
+                        bDenomin = true; // following elements are no more part of denominator
                 }
                 else if (nTypeArray[i] == NF_KEY_THAI_T)
                 {
@@ -1673,7 +1676,7 @@ sal_Int32 ImpSvNumberformatScan::FinalScan( OUString& rString )
                     sStrArray[i] = sKeyword[nTypeArray[i]];
                 }
                 else if (sStrArray[i][0] >= '0' &&
-                         sStrArray[i][0] <= '9')
+                         sStrArray[i][0] <= '9' && !bDenomin) // denominator was not yet found
                 {
                     OUString sDiv;
                     sal_uInt16 j = i;
@@ -1702,10 +1705,14 @@ sal_Int32 ImpSvNumberformatScan::FinalScan( OUString& rString )
                         {
                             nCntPre++;
                         }
+                        if ( bFrac )
+                            bDenomin = true; // next content should be treated as outside denominator
                     }
                 }
                 else
                 {
+                    if ( bFrac )
+                        bDenomin = true;    // next content should be treated as outside denominator
                     nTypeArray[i] = NF_SYMBOLTYPE_STRING;
                 }
                 nPos = nPos + sStrArray[i].getLength();
@@ -1741,19 +1748,27 @@ sal_Int32 ImpSvNumberformatScan::FinalScan( OUString& rString )
                     {
                         return nPos;                    // Error
                     }
-                    nTypeArray[i] = NF_SYMBOLTYPE_DIGIT;
-                    nPos = nPos + rStr.getLength();
-                    i++;
-                    nCounter++;
-                    while (i < nAnzStrings &&
-                           (sStrArray[i][0] == '#' ||
-                            sStrArray[i][0] == '0' ||
-                            sStrArray[i][0] == '?'))
+                    if ( !bDenomin )
                     {
                         nTypeArray[i] = NF_SYMBOLTYPE_DIGIT;
-                        nPos = nPos + sStrArray[i].getLength();
-                        nCounter++;
+                        nPos = nPos + rStr.getLength();
                         i++;
+                        nCounter++;
+                        while (i < nAnzStrings &&
+                              (sStrArray[i][0] == '#' ||
+                               sStrArray[i][0] == '0' ||
+                               sStrArray[i][0] == '?'))
+                        {
+                            nTypeArray[i] = NF_SYMBOLTYPE_DIGIT;
+                            nPos = nPos + sStrArray[i].getLength();
+                            nCounter++;
+                            i++;
+                        }
+                    }
+                    else // after denominator, treat any character as text
+                    {
+                        nTypeArray[i] = NF_SYMBOLTYPE_STRING;
+                        nPos = nPos + sStrArray[i].getLength();
                     }
                     break;
                 case '-':
@@ -1816,6 +1831,8 @@ sal_Int32 ImpSvNumberformatScan::FinalScan( OUString& rString )
                             else
                             {
                                 nTypeArray[i] = NF_SYMBOLTYPE_STRING;
+                                if ( bFrac )
+                                    bDenomin = true; // end of denominator
                             }
                         }
                         else if (i > 0 && i < nAnzStrings-1   &&
@@ -1982,12 +1999,16 @@ sal_Int32 ImpSvNumberformatScan::FinalScan( OUString& rString )
                                 nCntPre = nCounter;
                                 nCounter = 0;
                             }
+                            if ( bFrac )
+                                bDenomin = true; // next content is not part of denominator
                             nTypeArray[i] = NF_SYMBOLTYPE_STRING;
                             nPos = nPos + sStrArray[i].getLength();
                         }
                         else
                         {
                             nTypeArray[i] = NF_SYMBOLTYPE_STRING;
+                            if ( bFrac )
+                                bDenomin = true; // next content is not part of denominator
                             nPos = nPos + rStr.getLength();
                             i++;
                             while (i < nAnzStrings && StringEqualsChar( sStrArray[i], cSaved ) )
diff --git a/svl/source/numbers/zforscan.hxx b/svl/source/numbers/zforscan.hxx
index 001abe6de491..e0cec64bc859 100644
--- a/svl/source/numbers/zforscan.hxx
+++ b/svl/source/numbers/zforscan.hxx
@@ -174,6 +174,7 @@ private: // Private section
     bool bExp;                                  // Set when reading E
     bool bFrac;                                 // Set when reading /
     bool bBlank;                                // Set when reading ' ' (Fraction)
+    bool bDenomin;                              // Set when reading end of denominator
     bool bDecSep;                               // Set on first ,
     mutable bool bKeywordsNeedInit;             // Locale dependent keywords need to be initialized
     mutable bool bCompatCurNeedInit;            // Locale dependent compatibility currency need to be initialized