loplugin:useuniqueptr in SdrTextObj

Change-Id: I48f52056dcf17a568266be49f7422fa05be974db
Reviewed-on: https://gerrit.libreoffice.org/49274Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

include/svx/svdotext.hxx

@@ -28,11 +28,12 @@
 #include <svl/style.hxx>
 #include <svx/xtextit0.hxx>
 #include <svx/svdtext.hxx>
-#include <vector>
 #include <svx/svxdllapi.h>
 #include <drawinglayer/primitive2d/baseprimitive2d.hxx>
 #include <svx/svdpagv.hxx>
 #include <rtl/ref.hxx>
+#include <memory>
+#include <vector>
 
 
 //   forward declarations
@@ -185,7 +186,7 @@ protected:
     GeoStat                     aGeo;
 
     // this is the active text
-    SdrText*                    mpText;
+    std::unique_ptr<SdrText>    mpText;
 
     // This contains the dimensions of the text
     Size                        aTextSize;

svx/source/svdraw/svdotext.cxx

@@ -178,7 +178,7 @@ SdrTextObj::~SdrTextObj()
             rOutl.SetTextObj( nullptr );
     }
 
-    delete mpText;
+    mpText.reset();
 
     ImpDeregisterLink();
 }
@@ -2113,7 +2113,7 @@ SdrText* SdrTextObj::getActiveText() const
     if( !mpText )
         return getText( 0 );
     else
-        return mpText;
+        return mpText.get();
 }
 
 /** returns the nth available text. */
@@ -2121,9 +2121,9 @@ SdrText* SdrTextObj::getText( sal_Int32 nIndex ) const
 {
     if( nIndex == 0 )
     {
-        if( mpText == nullptr )
-            const_cast< SdrTextObj* >(this)->mpText = new SdrText( *const_cast< SdrTextObj* >(this) );
-        return mpText;
+        if( !mpText )
+            const_cast< SdrTextObj* >(this)->mpText.reset( new SdrText( *const_cast< SdrTextObj* >(this) ) );
+        return mpText.get();
     }
     else
     {