43b118c9b8
This fixes table edges always using single-width intersections and adds support for double horizontal lines with single vertical lines
101 lines
3.6 KiB
Haskell
101 lines
3.6 KiB
Haskell
-- | Text.Tabular.AsciiArt from tabular-0.2.2.7, modified to treat
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-- wide characters as double width.
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module Text.Tabular.AsciiWide where
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import Data.List (intersperse, transpose)
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import Text.Tabular
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import Hledger.Utils.String
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-- | for simplicity, we assume that each cell is rendered
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-- on a single line
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render :: Bool -- ^ pretty tables
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-> (rh -> String)
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-> (ch -> String)
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-> (a -> String)
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-> Table rh ch a
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-> String
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render pretty fr fc f (Table rh ch cells) =
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unlines $ [ bar SingleLine -- +--------------------------------------+
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, renderColumns pretty sizes ch2
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, bar DoubleLine -- +======================================+
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] ++
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(renderRs $ fmap renderR $ zipHeader [] cells $ fmap fr rh) ++
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[ bar SingleLine ] -- +--------------------------------------+
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where
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bar = concat . renderHLine pretty sizes ch2
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-- ch2 and cell2 include the row and column labels
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ch2 = Group DoubleLine [Header "", fmap fc ch]
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cells2 = headerContents ch2
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: zipWith (\h cs -> h : map f cs) rhStrings cells
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--
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renderR (cs,h) = renderColumns pretty sizes $ Group DoubleLine
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[ Header h
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, fmap fst $ zipHeader "" (map f cs) ch]
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rhStrings = map fr $ headerContents rh
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-- maximum width for each column
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sizes = map (maximum . map strWidth) . transpose $ cells2
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renderRs (Header s) = [s]
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renderRs (Group p hs) = concat . intersperse sep . map renderRs $ hs
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where sep = renderHLine pretty sizes ch2 p
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verticalBar :: Bool -> Char
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verticalBar pretty = if pretty then '│' else '|'
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leftBar :: Bool -> String
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leftBar pretty = verticalBar pretty : " "
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rightBar :: Bool -> String
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rightBar pretty = " " ++ [verticalBar pretty]
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midBar :: Bool -> String
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midBar pretty = " " ++ verticalBar pretty : " "
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doubleMidBar :: Bool -> String
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doubleMidBar pretty = if pretty then " ║ " else " || "
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horizontalBar :: Bool -> Char
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horizontalBar pretty = if pretty then '─' else '-'
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doubleHorizontalBar :: Bool -> Char
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doubleHorizontalBar pretty = if pretty then '═' else '='
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-- | We stop rendering on the shortest list!
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renderColumns :: Bool -- ^ pretty
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-> [Int] -- ^ max width for each column
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-> Header String
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-> String
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renderColumns pretty is h = leftBar pretty ++ coreLine ++ rightBar pretty
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where
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coreLine = concatMap helper $ flattenHeader $ zipHeader 0 is h
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helper = either hsep (uncurry padLeftWide)
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hsep :: Properties -> String
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hsep NoLine = " "
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hsep SingleLine = midBar pretty
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hsep DoubleLine = doubleMidBar pretty
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renderHLine :: Bool -- ^ pretty
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-> [Int] -- ^ width specifications
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-> Header String
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-> Properties
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-> [String]
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renderHLine _ _ _ NoLine = []
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renderHLine pretty w h SingleLine = [renderHLine' pretty SingleLine w (horizontalBar pretty) h]
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renderHLine pretty w h DoubleLine = [renderHLine' pretty DoubleLine w (doubleHorizontalBar pretty) h]
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renderHLine' :: Bool -> Properties -> [Int] -> Char -> Header String -> String
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renderHLine' pretty prop is sep h = edge ++ sep : coreLine ++ sep : edge
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where
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edge = cross SingleLine prop
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coreLine = concatMap helper $ flattenHeader $ zipHeader 0 is h
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helper = either vsep dashes
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dashes (i,_) = replicate i sep
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vsep v = sep : cross v prop ++ [sep]
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-- vertical horizontal
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cross SingleLine SingleLine = if pretty then "┼" else "+"
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cross SingleLine DoubleLine = if pretty then "╪" else "+"
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cross DoubleLine SingleLine = if pretty then "╫" else "++"
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cross DoubleLine DoubleLine = if pretty then "╬" else "++"
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cross _ _ = ""
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