Replace the whole content for copied documents

If the document is initialized in CreateCopy, it already contains
the initial empty paragraph. So we have to delete the content from
initial document, as we're going to replace the whole content with
the pasted document.

Change-Id: Ie6a64dcb070f7d611dfde97f2c1a721834b4167b
Reviewed-on: https://gerrit.libreoffice.org/10963Reviewed-by: Björn Michaelsen <bjoern.michaelsen@canonical.com>
Tested-by: Björn Michaelsen <bjoern.michaelsen@canonical.com>

sw/inc/IDocumentContentOperations.hxx

@@ -65,10 +65,36 @@ public:
     };
 
 public:
-    /** Copying of a range within or to another document.
-        The position can also be within the range!
+    /** Copy a selected content range to a position
+
+        The position can be in the same or in an another document. It can also
+        be within the range!
+
+        \warning The range has to include at least two nodes or has to be a
+        SwDoc::IsColumnSelection!
+
+        Normally this functions should work only with content nodes. But there
+        is a special case used by SwDoc::Paste, which starts the SwPaM at the
+        content start node. This position doesn't contain any content:
+
+        @code
+        SwNodeIndex aSourceIdx( rSource.GetNodes().GetEndOfExtras(), 1 );
+        @endcode
+
+        This is important, because it prevents merging of the first node of
+        the range into the node pointed to by \p rPos.
+        As a result this keeps all properties of the first real content node,
+        which is the 2nd, including the Flys and the page description. In this
+        case the first (fake) node is silently dropped and all other nodes are
+        just copied.
+
+        @param rPam
+        The source node range to copy
+
+        @param rPos
+        The target copy destination
      */
-    virtual bool CopyRange(SwPaM&, SwPosition&, const bool bCopyAll ) const = 0;
+    virtual bool CopyRange(SwPaM& rPam, SwPosition& rPos, const bool bCopyAll ) const = 0;
 
     /** Delete section containing the node.
     */

sw/source/core/doc/docnew.cxx

@@ -915,6 +915,12 @@ SfxObjectShell* SwDoc::CreateCopy(bool bCallInitNew ) const
     // copy content
     pRet->Paste( *this );
 
+    if ( bCallInitNew ) {
+        // delete leading page / initial content from target document
+        SwNodeIndex aDeleteIdx( pRet->GetNodes().GetEndOfExtras(), 2 );
+        pRet->GetNodes().Delete( aDeleteIdx, 1 );
+    }
+
     // remove the temporary shell if it is there as it was done before
     pRet->SetTmpDocShell( (SfxObjectShell*)NULL );
 
@@ -926,12 +932,14 @@ SfxObjectShell* SwDoc::CreateCopy(bool bCallInitNew ) const
 // copy document content - code from SwFEShell::Paste( SwDoc* )
 void SwDoc::Paste( const SwDoc& rSource )
 {
-    // this has to be empty const sal_uInt16 nStartPageNumber = GetPhyPageNum();
-    // until the end of the NodesArray
-    SwNodeIndex aSourceIdx( rSource.GetNodes().GetEndOfExtras(), 2 );
-    SwPaM aCpyPam( aSourceIdx ); //DocStart
-    SwNodeIndex aTargetIdx( GetNodes().GetEndOfExtras(), 2 );
-    SwPaM aInsertPam( aTargetIdx ); //replaces PCURCRSR from SwFEShell::Paste()
+    // GetEndOfExtras + 1 = StartOfContent == no content node!
+    // this ensures, that we have at least two nodes in the SwPaM.
+    // @see IDocumentContentOperations::CopyRange
+    SwNodeIndex aSourceIdx( rSource.GetNodes().GetEndOfExtras(), 1 );
+    SwPaM aCpyPam( aSourceIdx );
+
+    SwNodeIndex aTargetIdx( GetNodes().GetEndOfContent() );
+    SwPaM aInsertPam( aTargetIdx );
 
     aCpyPam.SetMark();
     aCpyPam.Move( fnMoveForward, fnGoDoc );