Resolves: tdf#95440 SharedString are interned per document, re-intern

... if literal strings are copied with formula expression tokens.

(cherry picked from commit dad412e0)

Conflicts:
	include/formula/token.hxx

Change-Id: I13526907bb6c2c605c6ed9584fa6e3f2b18623b8
Reviewed-on: https://gerrit.libreoffice.org/20731Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Markus Mohrhard <markus.mohrhard@googlemail.com>

formula/source/core/api/token.cxx

@@ -204,6 +204,11 @@ svl::SharedString FormulaToken::GetString() const
     return svl::SharedString(); // invalid string
 }
 
+void FormulaToken::SetString( const svl::SharedString& )
+{
+    SAL_WARN( "formula.core", "FormulaToken::SetString: virtual dummy called" );
+}
+
 sal_uInt16 FormulaToken::GetIndex() const
 {
     SAL_WARN( "formula.core", "FormulaToken::GetIndex: virtual dummy called" );
@@ -1523,6 +1528,21 @@ FormulaToken* FormulaTokenArray::AddOpCode( OpCode eOp )
     return AddToken( *pRet );
 }
 
+void FormulaTokenArray::ReinternStrings( svl::SharedStringPool& rPool )
+{
+    for (sal_uInt16 i=0; i < nLen; ++i)
+    {
+        switch (pCode[i]->GetType())
+        {
+            case svString:
+                pCode[i]->SetString( rPool.intern( pCode[i]->GetString().getString()));
+                break;
+            default:
+                ;   // nothing
+        }
+    }
+}
+
 
 /*----------------------------------------------------------------------*/
 
@@ -1653,6 +1673,11 @@ svl::SharedString FormulaStringToken::GetString() const
     return maString;
 }
 
+void FormulaStringToken::SetString( const svl::SharedString& rStr )
+{
+    maString = rStr;
+}
+
 bool FormulaStringToken::operator==( const FormulaToken& r ) const
 {
     return FormulaToken::operator==( r ) && maString == r.GetString();
@@ -1674,6 +1699,11 @@ svl::SharedString FormulaStringOpToken::GetString() const
     return maString;
 }
 
+void FormulaStringOpToken::SetString( const svl::SharedString& rStr )
+{
+    maString = rStr;
+}
+
 bool FormulaStringOpToken::operator==( const FormulaToken& r ) const
 {
     return FormulaByteToken::operator==( r ) && maString == r.GetString();

include/formula/token.hxx

@@ -150,7 +150,8 @@ public:
     virtual void                SetForceArray( bool b );
     virtual double              GetDouble() const;
     virtual double&             GetDoubleAsReference();
-    virtual svl::SharedString GetString() const;
+    virtual svl::SharedString   GetString() const;
+    virtual void                SetString( const svl::SharedString& rStr );
     virtual sal_uInt16          GetIndex() const;
     virtual void                SetIndex( sal_uInt16 n );
     virtual bool                IsGlobal() const;
@@ -288,6 +289,7 @@ public:
 
     virtual FormulaToken* Clone() const SAL_OVERRIDE;
     virtual svl::SharedString GetString() const SAL_OVERRIDE;
+    virtual void SetString( const svl::SharedString& rStr ) SAL_OVERRIDE;
     virtual bool operator==( const FormulaToken& rToken ) const SAL_OVERRIDE;
 
     DECL_FIXEDMEMPOOL_NEWDEL_DLL( FormulaStringToken )
@@ -305,6 +307,7 @@ public:
 
     virtual FormulaToken* Clone() const SAL_OVERRIDE;
     virtual svl::SharedString GetString() const SAL_OVERRIDE;
+    virtual void SetString( const svl::SharedString& rStr ) SAL_OVERRIDE;
     virtual bool operator==( const FormulaToken& rToken ) const SAL_OVERRIDE;
 };
 

include/formula/tokenarray.hxx

@@ -314,6 +314,9 @@ public:
 
     /** Determines if this formula may be followed by a reference. */
     bool                MayReferenceFollow();
+
+    /** Re-intern SharedString in case the SharedStringPool differs. */
+    void ReinternStrings( svl::SharedStringPool& rPool );
 };
 
 inline OpCode FormulaTokenArray::GetOuterFuncOpCode()

sc/source/core/data/formulacell.cxx

@@ -853,7 +853,11 @@ ScFormulaCell::ScFormulaCell( const ScFormulaCell& rCell, ScDocument& rDoc, cons
     }
 
     if (!pDocument->IsClipOrUndo())
+    {
+        if (&pDocument->GetSharedStringPool() != &rCell.pDocument->GetSharedStringPool())
+            pCode->ReinternStrings( pDocument->GetSharedStringPool());
         pCode->AdjustReferenceOnCopy( aPos);
+    }
 
     if ( nCloneFlags & SC_CLONECELL_ADJUST3DREL )
         pCode->ReadjustRelative3DReferences( rCell.aPos, aPos );