loplugin:useuniqueptr in SwDocShell::StartConvertFrom

fixing a leak in SwView::InsertMedium

Change-Id: I9abd97151b0fd7b3f6c286926e1a317ea47dc232
Reviewed-on: https://gerrit.libreoffice.org/60606
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

sw/inc/docsh.hxx

@@ -231,7 +231,7 @@ public:
                 { return const_cast<SwDocShell*>(this)->GetFEShell(); }
 
     /// For inserting document.
-    Reader* StartConvertFrom(SfxMedium& rMedium, SwReader** ppRdr,
+    Reader* StartConvertFrom(SfxMedium& rMedium, std::unique_ptr<SwReader>& rpRdr,
                             SwCursorShell const * pCursorSh = nullptr, SwPaM* pPaM = nullptr);
 
 #if defined(_WIN32)

sw/source/core/unocore/unocrsrhelper.cxx

@@ -1061,12 +1061,12 @@ void InsertFile(SwUnoCursor* pUnoCursor, const OUString& rURL,
     pMed->Download();   // if necessary: start the download
     if( aRef.is() && 1 < aRef->GetRefCount() )  // Ref still valid?
     {
-        SwReader* pRdr;
+        std::unique_ptr<SwReader> pRdr;
         SfxItemSet* pSet =  pMed->GetItemSet();
         pSet->Put(SfxBoolItem(FN_API_CALL, true));
         if(!sPassword.isEmpty())
             pSet->Put(SfxStringItem(SID_PASSWORD, sPassword));
-        Reader *pRead = pDocSh->StartConvertFrom( *pMed, &pRdr, nullptr, pUnoCursor);
+        Reader *pRead = pDocSh->StartConvertFrom( *pMed, pRdr, nullptr, pUnoCursor);
         if( pRead )
         {
 
@@ -1091,9 +1091,6 @@ void InsertFile(SwUnoCursor* pUnoCursor, const OUString& rURL,
                     nContent = 0;
                 pUnoCursor->GetMark()->nContent.Assign( pCntNode, nContent );
             }
-
-            delete pRdr;
-
         }
     }
 }

sw/source/uibase/app/docsh.cxx

@@ -153,17 +153,16 @@ bool SwDocShell::InsertGeneratedStream(SfxMedium & rMedium,
     if (!::sw::XTextRangeToSwPaM(aPam, xInsertPosition))
         return false;
     // similar to SwView::InsertMedium
-    SwReader *pReader(nullptr);
-    Reader *const pRead = StartConvertFrom(rMedium, &pReader, nullptr, &aPam);
+    std::unique_ptr<SwReader> pReader;
+    Reader *const pRead = StartConvertFrom(rMedium, pReader, nullptr, &aPam);
     if (!pRead)
         return false;
     ErrCode const nError = pReader->Read(*pRead);
-    delete pReader;
     return ERRCODE_NONE == nError;
 }
 
 // Prepare loading
-Reader* SwDocShell::StartConvertFrom(SfxMedium& rMedium, SwReader** ppRdr,
+Reader* SwDocShell::StartConvertFrom(SfxMedium& rMedium, std::unique_ptr<SwReader>& rpRdr,
                                     SwCursorShell const *pCursorShell,
                                     SwPaM* pPaM )
 {
@@ -195,10 +194,12 @@ Reader* SwDocShell::StartConvertFrom(SfxMedium& rMedium, SwReader** ppRdr,
         ? SwReaderType::Storage & pRead->GetReaderType()
         : SwReaderType::Stream & pRead->GetReaderType() )
     {
-        *ppRdr = pPaM ? new SwReader( rMedium, aFileName, *pPaM ) :
-            pCursorShell ?
-                new SwReader( rMedium, aFileName, *pCursorShell->GetCursor() )
-                    : new SwReader( rMedium, aFileName, m_xDoc.get() );
+        if (pPaM)
+            rpRdr.reset(new SwReader( rMedium, aFileName, *pPaM ));
+        else if (pCursorShell)
+            rpRdr.reset(new SwReader( rMedium, aFileName, *pCursorShell->GetCursor() ));
+        else
+            rpRdr.reset(new SwReader( rMedium, aFileName, m_xDoc.get() ));
     }
     else
         return nullptr;
@@ -230,8 +231,8 @@ Reader* SwDocShell::StartConvertFrom(SfxMedium& rMedium, SwReader** ppRdr,
 // Loading
 bool SwDocShell::ConvertFrom( SfxMedium& rMedium )
 {
-    SwReader* pRdr;
-    SwRead pRead = StartConvertFrom(rMedium, &pRdr);
+    std::unique_ptr<SwReader> pRdr;
+    SwRead pRead = StartConvertFrom(rMedium, pRdr);
     if (!pRead)
       return false; // #129881# return if no reader is found
     tools::SvRef<SotStorage> pStg=pRead->getSotStorageRef(); // #i45333# save sot storage ref in case of recursive calls
@@ -278,7 +279,7 @@ bool SwDocShell::ConvertFrom( SfxMedium& rMedium )
     UpdateFontList();
     InitDrawModelAndDocShell(this, m_xDoc ? m_xDoc->getIDocumentDrawModelAccess().GetDrawModel() : nullptr);
 
-    delete pRdr;
+    pRdr.reset();
 
     SW_MOD()->SetEmbeddedLoadSave( false );
 

sw/source/uibase/uiview/view2.cxx

@@ -2155,8 +2155,8 @@ long SwView::InsertMedium( sal_uInt16 nSlotId, std::unique_ptr<SfxMedium> pMediu
         pMedium->Download();    // start download if needed
         if( aRef.is() && 1 < aRef->GetRefCount() )  // still a valid ref?
         {
-            SwReader* pRdr;
-            Reader *pRead = pDocSh->StartConvertFrom(*pMedium, &pRdr, m_pWrtShell.get());
+            std::unique_ptr<SwReader> pRdr;
+            Reader *pRead = pDocSh->StartConvertFrom(*pMedium, pRdr, m_pWrtShell.get());
             if( pRead ||
                 (pMedium->GetFilter()->GetFilterFlags() & SfxFilterFlags::STARONEFILTER) )
             {
@@ -2174,7 +2174,7 @@ long SwView::InsertMedium( sal_uInt16 nSlotId, std::unique_ptr<SfxMedium> pMediu
                     if( pRead )
                     {
                         nErrno = pRdr->Read( *pRead );  // and insert document
-                        delete pRdr;
+                        pRdr.reset();
                     }
                     else
                     {