306 lines
13 KiB
Haskell
306 lines
13 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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{-# LANGUAGE OverloadedStrings #-}
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module Text.Tabular.AsciiWide
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( module Text.Tabular
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, TableOpts(..)
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, render
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, renderTable
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, renderTableB
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, renderTableByRowsB
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, renderRow
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, renderRowB
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, renderColumns
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, Cell(..)
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, Align(..)
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, emptyCell
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, textCell
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, textsCell
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, cellWidth
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, concatTables
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) where
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import Data.Bifunctor (bimap)
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import Data.Maybe (fromMaybe)
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import Data.Default (Default(..))
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import Data.List (intercalate, intersperse, transpose)
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import Data.Semigroup (stimesMonoid)
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import Data.Text (Text)
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import qualified Data.Text as T
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import qualified Data.Text.Lazy as TL
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import Data.Text.Lazy.Builder (Builder, fromString, fromText, singleton, toLazyText)
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import Safe (maximumMay)
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import Text.Tabular
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import Text.WideString (WideBuilder(..), wbFromText, textWidth)
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-- | The options to use for rendering a table.
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data TableOpts = TableOpts
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{ prettyTable :: Bool -- ^ Pretty tables
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, tableBorders :: Bool -- ^ Whether to display the outer borders
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, borderSpaces :: Bool -- ^ Whether to display spaces around bars
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} deriving (Show)
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instance Default TableOpts where
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def = TableOpts { prettyTable = False
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, tableBorders = True
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, borderSpaces = True
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}
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-- | Cell contents along an alignment
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data Cell = Cell Align [WideBuilder]
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-- | How to align text in a cell
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data Align = TopRight | BottomRight | BottomLeft | TopLeft
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deriving (Show)
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emptyCell :: Cell
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emptyCell = Cell TopRight []
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-- | Create a single-line cell from the given contents with its natural width.
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textCell :: Align -> Text -> Cell
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textCell a x = Cell a . map (\x -> WideBuilder (fromText x) (textWidth x)) $ if T.null x then [""] else T.lines x
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-- | Create a multi-line cell from the given contents with its natural width.
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textsCell :: Align -> [Text] -> Cell
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textsCell a = Cell a . fmap wbFromText
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-- | Return the width of a Cell.
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cellWidth :: Cell -> Int
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cellWidth (Cell _ xs) = fromMaybe 0 . maximumMay $ map wbWidth xs
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-- | Render a table according to common options, for backwards compatibility
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render :: Bool -> (rh -> Text) -> (ch -> Text) -> (a -> Text) -> Table rh ch a -> TL.Text
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render pretty fr fc f = renderTable def{prettyTable=pretty} (cell . fr) (cell . fc) (cell . f)
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where cell = textCell TopRight
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-- | Render a table according to various cell specifications>
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renderTable :: TableOpts -- ^ Options controlling Table rendering
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-> (rh -> Cell) -- ^ Rendering function for row headers
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-> (ch -> Cell) -- ^ Rendering function for column headers
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-> (a -> Cell) -- ^ Function determining the string and width of a cell
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-> Table rh ch a
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-> TL.Text
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renderTable topts fr fc f = toLazyText . renderTableB topts fr fc f
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-- | A version of renderTable which returns the underlying Builder.
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renderTableB :: TableOpts -- ^ Options controlling Table rendering
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-> (rh -> Cell) -- ^ Rendering function for row headers
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-> (ch -> Cell) -- ^ Rendering function for column headers
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-> (a -> Cell) -- ^ Function determining the string and width of a cell
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-> Table rh ch a
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-> Builder
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renderTableB topts fr fc f = renderTableByRowsB topts (fmap fc) $ bimap fr (fmap f)
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-- | A version of renderTable that operates on rows (including the 'row' of
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-- column headers) and returns the underlying Builder.
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renderTableByRowsB :: TableOpts -- ^ Options controlling Table rendering
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-> ([ch] -> [Cell]) -- ^ Rendering function for column headers
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-> ((rh, [a]) -> (Cell, [Cell])) -- ^ Rendering function for row and row header
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-> Table rh ch a
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-> Builder
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renderTableByRowsB topts@TableOpts{prettyTable=pretty, tableBorders=borders} fc f (Table rh ch cells) =
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unlinesB . addBorders $
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renderColumns topts sizes ch2
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: bar VM DoubleLine -- +======================================+
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: renderRs (fmap renderR $ zipHeader [] cellContents rowHeaders)
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where
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renderR :: ([Cell], Cell) -> Builder
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renderR (cs,h) = renderColumns topts sizes $ Group DoubleLine
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[ Header h
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, fmap fst $ zipHeader emptyCell cs colHeaders
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]
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rows = unzip . fmap f $ zip (headerContents rh) cells
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rowHeaders = fmap fst $ zipHeader emptyCell (fst rows) rh
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colHeaders = fmap fst $ zipHeader emptyCell (fc $ headerContents ch) ch
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cellContents = snd rows
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-- ch2 and cell2 include the row and column labels
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ch2 = Group DoubleLine [Header emptyCell, colHeaders]
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cells2 = headerContents ch2 : zipWith (:) (headerContents rowHeaders) cellContents
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-- maximum width for each column
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sizes = map (fromMaybe 0 . maximumMay . map cellWidth) $ transpose cells2
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renderRs (Header s) = [s]
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renderRs (Group p hs) = intercalate sep $ map renderRs hs
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where sep = renderHLine VM borders pretty sizes ch2 p
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-- borders and bars
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addBorders xs = if borders then bar VT SingleLine : xs ++ [bar VB SingleLine] else xs
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bar vpos prop = mconcat $ renderHLine vpos borders pretty sizes ch2 prop
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unlinesB = foldMap (<> singleton '\n')
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-- | Render a single row according to cell specifications.
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renderRow :: TableOpts -> Header Cell -> TL.Text
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renderRow topts = toLazyText . renderRowB topts
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-- | A version of renderRow which returns the underlying Builder.
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renderRowB:: TableOpts -> Header Cell -> Builder
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renderRowB topts h = renderColumns topts is h
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where is = map cellWidth $ headerContents h
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verticalBar :: Bool -> Char
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verticalBar pretty = if pretty then '│' else '|'
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leftBar :: Bool -> Bool -> Builder
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leftBar pretty True = fromString $ verticalBar pretty : " "
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leftBar pretty False = singleton $ verticalBar pretty
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rightBar :: Bool -> Bool -> Builder
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rightBar pretty True = fromString $ ' ' : [verticalBar pretty]
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rightBar pretty False = singleton $ verticalBar pretty
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midBar :: Bool -> Bool -> Builder
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midBar pretty True = fromString $ ' ' : verticalBar pretty : " "
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midBar pretty False = singleton $ verticalBar pretty
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doubleMidBar :: Bool -> Bool -> Builder
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doubleMidBar pretty True = fromText $ if pretty then " ║ " else " || "
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doubleMidBar pretty False = fromText $ if pretty then "║" else "||"
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-- | We stop rendering on the shortest list!
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renderColumns :: TableOpts -- ^ rendering options for the table
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-> [Int] -- ^ max width for each column
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-> Header Cell
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-> Builder
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renderColumns TableOpts{prettyTable=pretty, tableBorders=borders, borderSpaces=spaces} is h =
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mconcat . intersperse "\n" -- Put each line on its own line
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. map (addBorders . mconcat) . transpose -- Change to a list of lines and add borders
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. map (either hsep padCell) . flattenHeader -- We now have a matrix of strings
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. zipHeader 0 is $ padRow <$> h -- Pad cell height and add width marker
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where
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-- Pad each cell to have the appropriate width
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padCell (w, Cell TopLeft ls) = map (\x -> wbBuilder x <> fromText (T.replicate (w - wbWidth x) " ")) ls
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padCell (w, Cell BottomLeft ls) = map (\x -> wbBuilder x <> fromText (T.replicate (w - wbWidth x) " ")) ls
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padCell (w, Cell TopRight ls) = map (\x -> fromText (T.replicate (w - wbWidth x) " ") <> wbBuilder x) ls
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padCell (w, Cell BottomRight ls) = map (\x -> fromText (T.replicate (w - wbWidth x) " ") <> wbBuilder x) ls
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-- Pad each cell to have the same number of lines
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padRow (Cell TopLeft ls) = Cell TopLeft $ ls ++ replicate (nLines - length ls) mempty
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padRow (Cell TopRight ls) = Cell TopRight $ ls ++ replicate (nLines - length ls) mempty
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padRow (Cell BottomLeft ls) = Cell BottomLeft $ replicate (nLines - length ls) mempty ++ ls
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padRow (Cell BottomRight ls) = Cell BottomRight $ replicate (nLines - length ls) mempty ++ ls
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hsep :: Properties -> [Builder]
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hsep NoLine = replicate nLines $ if spaces then " " else ""
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hsep SingleLine = replicate nLines $ midBar pretty spaces
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hsep DoubleLine = replicate nLines $ doubleMidBar pretty spaces
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addBorders xs | borders = leftBar pretty spaces <> xs <> rightBar pretty spaces
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| spaces = fromText " " <> xs <> fromText " "
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| otherwise = xs
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nLines = fromMaybe 0 . maximumMay . map (\(Cell _ ls) -> length ls) $ headerContents h
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renderHLine :: VPos
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-> Bool -- ^ show outer borders
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-> Bool -- ^ pretty
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-> [Int] -- ^ width specifications
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-> Header a
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-> Properties
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-> [Builder]
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renderHLine _ _ _ _ _ NoLine = []
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renderHLine vpos borders pretty w h prop = [renderHLine' vpos borders pretty prop w h]
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renderHLine' :: VPos -> Bool -> Bool -> Properties -> [Int] -> Header a -> Builder
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renderHLine' vpos borders pretty prop is h = addBorders $ sep <> coreLine <> sep
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where
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addBorders xs = if borders then edge HL <> xs <> edge HR else xs
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edge hpos = boxchar vpos hpos SingleLine prop pretty
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coreLine = foldMap helper $ flattenHeader $ zipHeader 0 is h
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helper = either vsep dashes
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dashes (i,_) = stimesMonoid i sep
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sep = boxchar vpos HM NoLine prop pretty
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vsep v = case v of
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NoLine -> sep <> sep
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_ -> sep <> cross v prop <> sep
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cross v h = boxchar vpos HM v h pretty
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data VPos = VT | VM | VB -- top middle bottom
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data HPos = HL | HM | HR -- left middle right
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boxchar :: VPos -> HPos -> Properties -> Properties -> Bool -> Builder
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boxchar vpos hpos vert horiz = lineart u d l r
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where
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u = case vpos of
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VT -> NoLine
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_ -> vert
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d = case vpos of
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VB -> NoLine
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_ -> vert
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l = case hpos of
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HL -> NoLine
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_ -> horiz
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r = case hpos of
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HR -> NoLine
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_ -> horiz
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pick :: Text -> Text -> Bool -> Builder
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pick x _ True = fromText x
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pick _ x False = fromText x
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lineart :: Properties -> Properties -> Properties -> Properties -> Bool -> Builder
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-- up down left right
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lineart SingleLine SingleLine SingleLine SingleLine = pick "┼" "+"
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lineart SingleLine SingleLine SingleLine NoLine = pick "┤" "+"
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lineart SingleLine SingleLine NoLine SingleLine = pick "├" "+"
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lineart SingleLine NoLine SingleLine SingleLine = pick "┴" "+"
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lineart NoLine SingleLine SingleLine SingleLine = pick "┬" "+"
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lineart SingleLine NoLine NoLine SingleLine = pick "└" "+"
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lineart SingleLine NoLine SingleLine NoLine = pick "┘" "+"
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lineart NoLine SingleLine SingleLine NoLine = pick "┐" "+"
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lineart NoLine SingleLine NoLine SingleLine = pick "┌" "+"
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lineart SingleLine SingleLine NoLine NoLine = pick "│" "|"
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lineart NoLine NoLine SingleLine SingleLine = pick "─" "-"
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lineart DoubleLine DoubleLine DoubleLine DoubleLine = pick "╬" "++"
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lineart DoubleLine DoubleLine DoubleLine NoLine = pick "╣" "++"
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lineart DoubleLine DoubleLine NoLine DoubleLine = pick "╠" "++"
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lineart DoubleLine NoLine DoubleLine DoubleLine = pick "╩" "++"
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lineart NoLine DoubleLine DoubleLine DoubleLine = pick "╦" "++"
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lineart DoubleLine NoLine NoLine DoubleLine = pick "╚" "++"
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lineart DoubleLine NoLine DoubleLine NoLine = pick "╝" "++"
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lineart NoLine DoubleLine DoubleLine NoLine = pick "╗" "++"
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lineart NoLine DoubleLine NoLine DoubleLine = pick "╔" "++"
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lineart DoubleLine DoubleLine NoLine NoLine = pick "║" "||"
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lineart NoLine NoLine DoubleLine DoubleLine = pick "═" "="
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lineart DoubleLine NoLine NoLine SingleLine = pick "╙" "++"
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lineart DoubleLine NoLine SingleLine NoLine = pick "╜" "++"
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lineart NoLine DoubleLine SingleLine NoLine = pick "╖" "++"
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lineart NoLine DoubleLine NoLine SingleLine = pick "╓" "++"
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lineart SingleLine NoLine NoLine DoubleLine = pick "╘" "+"
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lineart SingleLine NoLine DoubleLine NoLine = pick "╛" "+"
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lineart NoLine SingleLine DoubleLine NoLine = pick "╕" "+"
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lineart NoLine SingleLine NoLine DoubleLine = pick "╒" "+"
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lineart DoubleLine DoubleLine SingleLine NoLine = pick "╢" "++"
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lineart DoubleLine DoubleLine NoLine SingleLine = pick "╟" "++"
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lineart DoubleLine NoLine SingleLine SingleLine = pick "╨" "++"
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lineart NoLine DoubleLine SingleLine SingleLine = pick "╥" "++"
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lineart SingleLine SingleLine DoubleLine NoLine = pick "╡" "+"
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lineart SingleLine SingleLine NoLine DoubleLine = pick "╞" "+"
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lineart SingleLine NoLine DoubleLine DoubleLine = pick "╧" "+"
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lineart NoLine SingleLine DoubleLine DoubleLine = pick "╤" "+"
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lineart SingleLine SingleLine DoubleLine DoubleLine = pick "╪" "+"
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lineart DoubleLine DoubleLine SingleLine SingleLine = pick "╫" "++"
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lineart _ _ _ _ = const mempty
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-- | Add the second table below the first, discarding its column headings.
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concatTables :: Properties -> Table rh ch a -> Table rh ch2 a -> Table rh ch a
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concatTables prop (Table hLeft hTop dat) (Table hLeft' _ dat') =
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Table (Group prop [hLeft, hLeft']) hTop (dat ++ dat')
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