{-# LANGUAGE CPP #-}
{-# LANGUAGE GeneralizedNewtypeDeriving #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE RecordWildCards #-}
module Patat.Presentation.Display
( displayPresentation
, displayPresentationError
, dumpPresentation
) where
import Control.Monad (mplus, unless)
import qualified Data.Aeson.Extended as A
import Data.Data.Extended (grecQ)
import qualified Data.List as L
import Data.Maybe (fromMaybe)
import qualified Data.Text as T
import Patat.Cleanup
import qualified Patat.Images as Images
import Patat.Presentation.Display.CodeBlock
import Patat.Presentation.Display.Table
import Patat.Presentation.Internal
import Patat.PrettyPrint ((<$$>), (<+>))
import qualified Patat.PrettyPrint as PP
import Patat.Theme (Theme (..))
import qualified Patat.Theme as Theme
import Prelude
import qualified System.Console.ANSI as Ansi
import qualified System.Console.Terminal.Size as Terminal
import qualified System.IO as IO
import qualified Text.Pandoc.Extended as Pandoc
data CanvasSize = CanvasSize {csRows :: Int, csCols :: Int} deriving (Show)
displayWithBorders
:: Presentation -> (CanvasSize -> Theme -> PP.Doc) -> IO Cleanup
displayWithBorders Presentation {..} f = do
Ansi.clearScreen
Ansi.setCursorPosition 0 0
mbWindow <- Terminal.size
let columns = fromMaybe 72 $
(A.unFlexibleNum <$> psColumns pSettings) `mplus`
(Terminal.width <$> mbWindow)
rows = fromMaybe 24 $
(A.unFlexibleNum <$> psRows pSettings) `mplus`
(Terminal.height <$> mbWindow)
let settings = pSettings {psColumns = Just $ A.FlexibleNum columns}
theme = fromMaybe Theme.defaultTheme (psTheme settings)
title = PP.toString (prettyInlines theme pTitle)
titleWidth = length title
titleOffset = (columns - titleWidth) `div` 2
borders = themed (themeBorders theme)
unless (null title) $ do
let titleRemainder = columns - titleWidth - titleOffset
wrappedTitle = PP.spaces titleOffset <> PP.string title <> PP.spaces titleRemainder
PP.putDoc $ borders wrappedTitle
putStrLn ""
putStrLn ""
let canvasSize = CanvasSize (rows - 2) columns
PP.putDoc $ formatWith settings $ f canvasSize theme
putStrLn ""
let (sidx, _) = pActiveFragment
active = show (sidx + 1) ++ " / " ++ show (length pSlides)
activeWidth = length active
author = PP.toString (prettyInlines theme pAuthor)
authorWidth = length author
middleSpaces = PP.spaces $ columns - activeWidth - authorWidth - 2
Ansi.setCursorPosition (rows - 1) 0
PP.putDoc $ borders $ PP.space <> PP.string author <> middleSpaces <> PP.string active <> PP.space
IO.hFlush IO.stdout
return mempty
displayImage :: Images.Handle -> FilePath -> IO Cleanup
displayImage images path = do
Ansi.clearScreen
Ansi.setCursorPosition 0 0
putStrLn ""
IO.hFlush IO.stdout
Images.drawImage images path
displayPresentation :: Maybe Images.Handle -> Presentation -> IO Cleanup
displayPresentation mbImages pres@Presentation {..} =
case getActiveFragment pres of
Nothing -> displayWithBorders pres mempty
Just (ActiveContent fragment)
| Just images <- mbImages
, Just image <- onlyImage fragment ->
displayImage images $ T.unpack image
Just (ActiveContent fragment) ->
displayWithBorders pres $ \_canvasSize theme ->
prettyFragment theme fragment
Just (ActiveTitle block) ->
displayWithBorders pres $ \canvasSize theme ->
let pblock = prettyBlock theme block
(prows, pcols) = PP.dimensions pblock
(mLeft, mRight) = marginsOf pSettings
offsetRow = (csRows canvasSize `div` 2) - (prows `div` 2)
offsetCol = ((csCols canvasSize - mLeft - mRight) `div` 2) - (pcols `div` 2)
spaces = PP.NotTrimmable $ PP.spaces offsetCol in
mconcat (replicate (offsetRow - 3) PP.hardline) <$$>
PP.indent spaces spaces pblock
where
onlyImage (Fragment blocks)
| [Pandoc.Para para] <- filter isVisibleBlock blocks
, [Pandoc.Image _ _ (target, _)] <- para =
Just target
onlyImage (Fragment blocks)
| [Pandoc.Header _ _ _, Pandoc.Para para] <- filter isVisibleBlock blocks
, [Pandoc.Image _ _ (target, _)] <- para =
Just target
onlyImage _ = Nothing
displayPresentationError :: Presentation -> String -> IO Cleanup
displayPresentationError pres err = displayWithBorders pres $ \_ Theme {..} ->
themed themeStrong "Error occurred in the presentation:" <$$>
"" <$$>
(PP.string err)
dumpPresentation :: Presentation -> IO ()
dumpPresentation pres =
let settings = pSettings pres
theme = fromMaybe Theme.defaultTheme (psTheme $ settings) in
PP.putDoc $ formatWith settings $
PP.vcat $ L.intersperse "----------" $ do
slide <- pSlides pres
return $ case slide of
TitleSlide block -> "~~~title" <$$> prettyBlock theme block
ContentSlide fragments -> PP.vcat $ L.intersperse "~~~frag" $ do
fragment <- fragments
return $ prettyFragment theme fragment
formatWith :: PresentationSettings -> PP.Doc -> PP.Doc
formatWith ps = wrap . indent
where
(marginLeft, marginRight) = marginsOf ps
wrap = case (psWrap ps, psColumns ps) of
(Just True, Just (A.FlexibleNum col)) -> PP.wrapAt (Just $ col - marginRight)
_ -> id
spaces = PP.NotTrimmable $ PP.spaces marginLeft
indent = PP.indent spaces spaces
prettyFragment :: Theme -> Fragment -> PP.Doc
prettyFragment theme fragment@(Fragment blocks) =
prettyBlocks theme blocks <>
case prettyReferences theme fragment of
[] -> mempty
refs -> PP.hardline <> PP.vcat refs
prettyBlock :: Theme -> Pandoc.Block -> PP.Doc
prettyBlock theme (Pandoc.Plain inlines) = prettyInlines theme inlines
prettyBlock theme (Pandoc.Para inlines) =
prettyInlines theme inlines <> PP.hardline
prettyBlock theme@Theme {..} (Pandoc.Header i _ inlines) =
themed themeHeader (PP.string (replicate i '#') <+> prettyInlines theme inlines) <>
PP.hardline
prettyBlock theme (Pandoc.CodeBlock (_, classes, _) txt) =
prettyCodeBlock theme classes txt
prettyBlock theme (Pandoc.BulletList bss) = PP.vcat
[ PP.indent
(PP.NotTrimmable $ themed (themeBulletList theme) prefix)
(PP.Trimmable " ")
(prettyBlocks theme' bs)
| bs <- bss
] <> PP.hardline
where
prefix = " " <> PP.string [marker] <> " "
marker = case T.unpack <$> themeBulletListMarkers theme of
Just (x : _) -> x
_ -> '-'
theme' = theme
{ themeBulletListMarkers =
(\ls -> T.drop 1 ls <> T.take 1 ls) <$> themeBulletListMarkers theme
}
prettyBlock theme@Theme {..} (Pandoc.OrderedList _ bss) = PP.vcat
[ PP.indent
(PP.NotTrimmable $ themed themeOrderedList $ PP.string prefix)
(PP.Trimmable " ")
(prettyBlocks theme bs)
| (prefix, bs) <- zip padded bss
] <> PP.hardline
where
padded = [n ++ replicate (4 - length n) ' ' | n <- numbers]
numbers =
[ show i ++ "."
| i <- [1 .. length bss]
]
prettyBlock _theme (Pandoc.RawBlock _ t) = PP.text t <> PP.hardline
prettyBlock _theme Pandoc.HorizontalRule = "---"
prettyBlock theme@Theme {..} (Pandoc.BlockQuote bs) =
let quote = PP.NotTrimmable (themed themeBlockQuote "> ") in
PP.indent quote quote (prettyBlocks theme bs)
prettyBlock theme@Theme {..} (Pandoc.DefinitionList terms) =
PP.vcat $ map prettyDefinition terms
where
prettyDefinition (term, definitions) =
themed themeDefinitionTerm (prettyInlines theme term) <$$>
PP.hardline <> PP.vcat
[ PP.indent
(PP.NotTrimmable (themed themeDefinitionList ": "))
(PP.Trimmable " ") $
prettyBlocks theme (Pandoc.plainToPara definition)
| definition <- definitions
]
prettyBlock theme (Pandoc.Table caption aligns _ headers rows) =
PP.wrapAt Nothing $
prettyTable theme Table
{ tCaption = prettyInlines theme caption
, tAligns = map align aligns
, tHeaders = map (prettyBlocks theme) headers
, tRows = map (map (prettyBlocks theme)) rows
}
where
align Pandoc.AlignLeft = PP.AlignLeft
align Pandoc.AlignCenter = PP.AlignCenter
align Pandoc.AlignDefault = PP.AlignLeft
align Pandoc.AlignRight = PP.AlignRight
prettyBlock theme (Pandoc.Div _attrs blocks) = prettyBlocks theme blocks
prettyBlock _theme Pandoc.Null = mempty
#if MIN_VERSION_pandoc(1,18,0)
prettyBlock theme@Theme {..} (Pandoc.LineBlock inliness) =
let ind = PP.NotTrimmable (themed themeLineBlock "| ") in
PP.wrapAt Nothing $
PP.indent ind ind $
PP.vcat $
map (prettyInlines theme) inliness
#endif
prettyBlocks :: Theme -> [Pandoc.Block] -> PP.Doc
prettyBlocks theme = PP.vcat . map (prettyBlock theme) . filter isVisibleBlock
prettyInline :: Theme -> Pandoc.Inline -> PP.Doc
prettyInline _theme Pandoc.Space = PP.space
prettyInline _theme (Pandoc.Str str) = PP.text str
prettyInline theme@Theme {..} (Pandoc.Emph inlines) =
themed themeEmph $
prettyInlines theme inlines
prettyInline theme@Theme {..} (Pandoc.Strong inlines) =
themed themeStrong $
prettyInlines theme inlines
prettyInline Theme {..} (Pandoc.Code _ txt) =
themed themeCode $
PP.text (" " <> txt <> " ")
prettyInline theme@Theme {..} link@(Pandoc.Link _attrs text (target, _title))
| isReferenceLink link =
"[" <> themed themeLinkText (prettyInlines theme text) <> "]"
| otherwise =
"<" <> themed themeLinkTarget (PP.text target) <> ">"
prettyInline _theme Pandoc.SoftBreak = PP.softline
prettyInline _theme Pandoc.LineBreak = PP.hardline
prettyInline theme@Theme {..} (Pandoc.Strikeout t) =
"~~" <> themed themeStrikeout (prettyInlines theme t) <> "~~"
prettyInline theme@Theme {..} (Pandoc.Quoted Pandoc.SingleQuote t) =
"'" <> themed themeQuoted (prettyInlines theme t) <> "'"
prettyInline theme@Theme {..} (Pandoc.Quoted Pandoc.DoubleQuote t) =
"'" <> themed themeQuoted (prettyInlines theme t) <> "'"
prettyInline Theme {..} (Pandoc.Math _ t) =
themed themeMath (PP.text t)
prettyInline theme@Theme {..} (Pandoc.Image _attrs text (target, _title)) =
"![" <> themed themeImageText (prettyInlines theme text) <> "](" <>
themed themeImageTarget (PP.text target) <> ")"
prettyInline theme (Pandoc.Cite _ t) = prettyInlines theme t
prettyInline theme (Pandoc.Span _ t) = prettyInlines theme t
prettyInline _theme (Pandoc.RawInline _ t) = PP.text t
prettyInline theme (Pandoc.Note t) = prettyBlocks theme t
prettyInline theme (Pandoc.Superscript t) = prettyInlines theme t
prettyInline theme (Pandoc.Subscript t) = prettyInlines theme t
prettyInline theme (Pandoc.SmallCaps t) = prettyInlines theme t
prettyInlines :: Theme -> [Pandoc.Inline] -> PP.Doc
prettyInlines theme = mconcat . map (prettyInline theme)
prettyReferences :: Theme -> Fragment -> [PP.Doc]
prettyReferences theme@Theme {..} =
map prettyReference . getReferences . unFragment
where
getReferences :: [Pandoc.Block] -> [Pandoc.Inline]
getReferences = filter isReferenceLink . grecQ
prettyReference :: Pandoc.Inline -> PP.Doc
prettyReference (Pandoc.Link _attrs text (target, title)) =
"[" <>
themed themeLinkText (prettyInlines theme $ Pandoc.newlineToSpace text) <>
"](" <>
themed themeLinkTarget (PP.text target) <>
(if T.null title
then mempty
else PP.space <> "\"" <> PP.text title <> "\"")
<> ")"
prettyReference _ = mempty
isReferenceLink :: Pandoc.Inline -> Bool
isReferenceLink (Pandoc.Link _attrs text (target, _)) =
[Pandoc.Str target] /= text
isReferenceLink _ = False
isVisibleBlock :: Pandoc.Block -> Bool
isVisibleBlock Pandoc.Null = False
isVisibleBlock (Pandoc.RawBlock (Pandoc.Format "html") t) =
not ("<!--" `T.isPrefixOf` t && "-->" `T.isSuffixOf` t)
isVisibleBlock _ = True