[LyX/2.3.x] Recreate citation label after paste

[Juergen Spitzmueller]

commit c0ef31d9b9816a81d00ae3f37625ff69e1be30ec
Author: Juergen Spitzmueller <sp...@lyx.org>
Date:   Wed Dec 6 09:11:18 2017 +0100

    Recreate citation label after paste
    
    Fixes: #10829
    (cherry picked from commit 7e34e659431691fd723e408010f90973c0a25b39)
---
 src/CutAndPaste.cpp        |   11 +++++++++++
 src/insets/InsetCitation.h |    2 ++
 2 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/src/CutAndPaste.cpp b/src/CutAndPaste.cpp
index f611d59..57a8313 100644
--- a/src/CutAndPaste.cpp
+++ b/src/CutAndPaste.cpp
@@ -40,6 +40,7 @@
 
 #include "insets/InsetBibitem.h"
 #include "insets/InsetBranch.h"
+#include "insets/InsetCitation.h"
 #include "insets/InsetCommand.h"
 #include "insets/InsetFlex.h"
 #include "insets/InsetGraphics.h"
@@ -357,6 +358,16 @@ pasteSelectionHelper(DocIterator const & cur, 
ParagraphList const & parlist,
                        break;
                }
 
+               case CITE_CODE: {
+                       InsetCitation & cit = static_cast<InsetCitation &>(*it);
+                       // This actually only needs to be done if the cite 
engine
+                       // differs, but we do it in general.
+                       cit.redoLabel();
+                       // We need to update the list of citations.
+                       need_update = true;
+                       break;
+               }
+
                case BIBITEM_CODE: {
                        // check for duplicates
                        InsetBibitem & bib = static_cast<InsetBibitem &>(*it);
diff --git a/src/insets/InsetCitation.h b/src/insets/InsetCitation.h
index 992a85e..3e5e3ba 100644
--- a/src/insets/InsetCitation.h
+++ b/src/insets/InsetCitation.h
@@ -82,6 +82,8 @@ public:
        static bool isCompatibleCommand(std::string const &);
        //@}
        ///
+       void redoLabel() { cache.recalculate = true; }
+       ///
        CitationStyle getCitationStyle(BufferParams const & bp, std::string 
const & input,
                                       std::vector<CitationStyle> const & 
valid_styles) const;
        ///