tdf#64588 - prevent loss of non-uniquely-named slide

Although the UI prevents someone from renaming slides
so that two have the same name, it is still possible to
have such non-uniquely named pages apparently.  Since drag/drop
uses the name to add a slide to the clipboard, it resulted
in duplicates of the first found instance of the slidename, and
loss of the similarly-named slides when they were dragged to
a new location.

Change-Id: I2986a7c6c3360162adf9430f645d0dfc73f1d4e2
Reviewed-on: https://gerrit.libreoffice.org/32481
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Justin Luth <justin_luth@sil.org>
Reviewed-by: Thorsten Behrens <Thorsten.Behrens@CIB.de>

1 files changed, 8 insertions, 0 deletions

diff --git a/sd/source/ui/inc/DrawDocShell.hxx b/sd/source/ui/inc/DrawDocShell.hxx
index 8d1ad05b001b..ccb139532641 100644
--- a/sd/source/ui/inc/DrawDocShell.hxx
+++ b/sd/source/ui/inc/DrawDocShell.hxx
@@ -183,6 +183,14 @@ public:
      */
     bool                    IsNewPageNameValid( OUString & rInOutPageName, bool bResetStringIfStandardName = false );
 
+    /** checks, if the given name is a *unique* name for an *existing* slide
+
+        @param rPageName the name of an existing slide
+
+        @return true, if the name is unique and the slide exists
+    */
+    bool                    IsPageNameUnique(const OUString& rPagName) const;
+
     /** Return the reference device for the current document.  When the
         inherited implementation returns a device then this is passed to the
         caller.  Otherwise the returned value depends on the printer