diff options
Diffstat (limited to 'src/Text/Pandoc')
| -rw-r--r-- | src/Text/Pandoc/Pretty.hs | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/src/Text/Pandoc/Pretty.hs b/src/Text/Pandoc/Pretty.hs index faf2a6797..033511832 100644 --- a/src/Text/Pandoc/Pretty.hs +++ b/src/Text/Pandoc/Pretty.hs @@ -60,6 +60,7 @@ module Text.Pandoc.Pretty ( , hsep , vcat , vsep + , nestle , chomp , inside , braces @@ -72,7 +73,7 @@ module Text.Pandoc.Pretty ( ) where -import Data.Sequence (Seq, fromList, (<|), singleton, mapWithIndex) +import Data.Sequence (Seq, fromList, (<|), singleton, mapWithIndex, viewl, ViewL(..)) import Data.Foldable (toList) import Data.List (intercalate) import Data.Monoid @@ -186,6 +187,14 @@ vcat = foldr ($$) empty vsep :: [Doc] -> Doc vsep = foldr ($+$) empty +-- | Removes leading blank lines from a 'Doc'. +nestle :: Doc -> Doc +nestle (Doc d) = Doc $ go d + where go x = case viewl x of + (BlankLine :< rest) -> go rest + (NewLine :< rest) -> go rest + _ -> x + -- | Chomps trailing blank space off of a 'Doc'. chomp :: Doc -> Doc chomp d = Doc (fromList dl') |