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authorJoey Hess2014-07-06 16:32:05 -0400
committerJoey Hess2014-07-06 16:32:05 -0400
commit5002b5e3915890542286487efb852c16c0ca988d (patch)
treee2fb5a55975ca1644d891f27472a4759bc72c05b /src/Utility
parent77f396175231f52f7658ab8702bcd8f776a82242 (diff)
propellor spin
Diffstat (limited to 'src/Utility')
-rw-r--r--src/Utility/Table.hs28
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diff --git a/src/Utility/Table.hs b/src/Utility/Table.hs
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+{- text based table generation
+ -
+ - Copyright 2014 Joey Hess <joey@kitenet.net>
+ -
+ - License: BSD-2-clause
+ -}
+
+module Utility.Table where
+
+type Table = [[String]]
+
+-- | A table with a header that is set off with lines under each
+-- header item.
+tableWithHeader :: [String] -> [[String]] -> Table
+tableWithHeader header rows = header : map linesep header : rows
+ where
+ linesep = map (const '-')
+
+-- | Formats a table to lines, automatically padding rows to the same size.
+formatTable :: Table -> [String]
+formatTable table = map (\r -> unwords (map pad (zip r rowsizes))) table
+ where
+ pad (cell, size) = cell ++ take (size - length cell) padding
+ padding = repeat ' '
+ rowsizes = sumrows (map (map length) table)
+ sumrows [] = repeat 0
+ sumrows [r] = r
+ sumrows (r1:r2:rs) = sumrows $ map (uncurry max) (zip r1 r2) : rs