LaTeX writer: do not use longtable foot with Beamer

The table foot is made part of the table body, as otherwise it won't
show up in the output. The root cause for this is that longtable cannot
detect page breaks in Beamer.

Fixes: #8638

1 files changed, 16 insertions, 4 deletions

diff --git a/src/Text/Pandoc/Writers/LaTeX/Table.hs b/src/Text/Pandoc/Writers/LaTeX/Table.hs
index 773c65985..63683f79f 100644
--- a/src/Text/Pandoc/Writers/LaTeX/Table.hs
+++ b/src/Text/Pandoc/Writers/LaTeX/Table.hs
@@ -76,16 +76,28 @@ tableToLaTeX inlnsToLaTeX blksToLaTeX tbl = do
              pure $ "\\midrule\\noalign{}" $$ vcat lastfoot
   modify $ \s -> s{ stTable = True }
   notes <- notesToLaTeX <$> gets stNotes
+  beamer <- gets stBeamer
   return
     $  "\\begin{longtable}[]" <>
           braces ("@{}" <> colDescriptors tbl <> "@{}")
           -- the @{} removes extra space at beginning and end
     $$ head'
     $$ "\\endhead"
-    $$ foot'
-    $$ "\\bottomrule\\noalign{}"
-    $$ "\\endlastfoot"
-    $$ vcat rows'
+    $$ vcat
+       -- Longtable is not able to detect pagebreaks in Beamer; this
+       -- causes problems with the placement of the footer, so make
+       -- footer and bottom rule part of the body when targeting Beamer.
+       -- See issue #8638.
+       (if beamer
+             then [ vcat rows'
+                  , foot'
+                  , "\\bottomrule\\noalign{}"
+                  ]
+             else [ foot'
+                  , "\\bottomrule\\noalign{}"
+                  , "\\endlastfoot"
+                  ,  vcat rows'
+                  ])
     $$ "\\end{longtable}"
     $$ captNotes
     $$ notes