sw lok comments: implement clipboard copy

Change-Id: I0f45b1a6ab198a8403073eea05497e76f758250c
(cherry picked from commit 4890ae51288c2c571e85a1536cb6c8f44681bd25)

sw/source/uibase/uno/unotxdoc.cxx

@@ -134,6 +134,8 @@
 #include <srcview.hxx>
 #include <edtwin.hxx>
 #include <swdtflvr.hxx>
+#include <SidebarWin.hxx>
+#include <PostItMgr.hxx>
 
 #include <svtools/langtab.hxx>
 #include <svtools/miscopt.hxx>
@@ -3373,6 +3375,16 @@ OString SwXTextDocument::getTextSelection(const char* pMimeType, OString& rUsedM
         }
     }
 
+    if (SwPostItMgr* pPostItMgr = pDocShell->GetView()->GetPostItMgr())
+    {
+        if (sw::sidebarwindows::SwSidebarWin* pWin = pPostItMgr->GetActiveSidebarWin())
+        {
+            // Editing postit text.
+            EditView& rEditView = pWin->GetOutlinerView()->GetEditView();
+            xTransferable = rEditView.GetEditEngine()->CreateTransferable(rEditView.GetSelection());
+        }
+    }
+
     if (!xTransferable.is())
         xTransferable = new SwTransferable(*pWrtShell);