patat (empty) → 0.1.0.0
raw patch · 14 files changed
+1519/−0 lines, 14 filesdep +ansi-terminaldep +ansi-wl-pprintdep +basesetup-changed
Dependencies added: ansi-terminal, ansi-wl-pprint, base, containers, directory, filepath, mtl, optparse-applicative, pandoc, terminal-size, time
Files
- CHANGELOG.md +4/−0
- LICENSE +339/−0
- Setup.hs +2/−0
- patat.cabal +48/−0
- src/Data/Data/Extended.hs +23/−0
- src/Main.hs +137/−0
- src/Patat/Presentation.hs +16/−0
- src/Patat/Presentation/Display.hs +243/−0
- src/Patat/Presentation/Display/Table.hs +93/−0
- src/Patat/Presentation/Interactive.hs +100/−0
- src/Patat/Presentation/Internal.hs +27/−0
- src/Patat/Presentation/Read.hs +80/−0
- src/Patat/PrettyPrint.hs +386/−0
- src/Text/Pandoc/Extended.hs +21/−0
+ CHANGELOG.md view
@@ -0,0 +1,4 @@+# Changelog++- 0.1.0.0 (2016-10-02)+ * Upload first version from hotel wifi in Kalaw.
+ LICENSE view
@@ -0,0 +1,339 @@+ GNU GENERAL PUBLIC LICENSE+ Version 2, June 1991++ Copyright (C) 1989, 1991 Free Software Foundation, Inc.,+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA+ Everyone is permitted to copy and distribute verbatim copies+ of this license document, but changing it is not allowed.++ Preamble++ The licenses for most software are designed to take away your+freedom to share and change it. By contrast, the GNU General Public+License is intended to guarantee your freedom to share and change free+software--to make sure the software is free for all its users. This+General Public License applies to most of the Free Software+Foundation's software and to any other program whose authors commit to+using it. (Some other Free Software Foundation software is covered by+the GNU Lesser General Public License instead.) You can apply it to+your programs, too.++ When we speak of free software, we are referring to freedom, not+price. 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See the+ GNU General Public License for more details.++ You should have received a copy of the GNU General Public License along+ with this program; if not, write to the Free Software Foundation, Inc.,+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.++Also add information on how to contact you by electronic and paper mail.++If the program is interactive, make it output a short notice like this+when it starts in an interactive mode:++ Gnomovision version 69, Copyright (C) year name of author+ Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.+ This is free software, and you are welcome to redistribute it+ under certain conditions; type `show c' for details.++The hypothetical commands `show w' and `show c' should show the appropriate+parts of the General Public License. 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+ Setup.hs view
@@ -0,0 +1,2 @@+import Distribution.Simple+main = defaultMain
+ patat.cabal view
@@ -0,0 +1,48 @@+Name: patat+Version: 0.1.0.0+Synopsis: Terminal-based presentations using Pandoc+Description: Terminal-based presentations using Pandoc+License: GPL-2+License-file: LICENSE+Author: Jasper Van der Jeugt <m@jaspervdj.be>+Maintainer: Jasper Van der Jeugt <m@jaspervdj.be>+Homepage: http://github.com/jaspervdj/patat+Copyright: 2016 Jasper Van der Jeugt+Category: Text+Build-type: Simple+Extra-source-files: CHANGELOG.md+Cabal-version: >=1.10++Source-repository head+ Type: git+ Location: git://github.com/jaspervdj/patat.git++Executable patat+ Main-is: Main.hs+ Ghc-options: -Wall -threaded -rtsopts "-with-rtsopts=-N"+ Hs-source-dirs: src+ Default-language: Haskell2010++ Build-depends:+ ansi-terminal >= 0.6 && < 0.7,+ ansi-wl-pprint >= 0.6 && < 0.7,+ base >= 4.6 && < 4.10,+ containers >= 0.5 && < 0.6,+ directory >= 1.2 && < 1.3,+ filepath >= 1.4 && < 1.5,+ mtl >= 2.2 && < 2.3,+ optparse-applicative >= 0.12 && < 0.14,+ pandoc >= 1.17 && < 1.18,+ terminal-size >= 0.3 && < 0.4,+ time >= 1.4 && < 1.7++ Other-modules:+ Data.Data.Extended+ Patat.Presentation+ Patat.Presentation.Display+ Patat.Presentation.Display.Table+ Patat.Presentation.Interactive+ Patat.Presentation.Internal+ Patat.Presentation.Read+ Patat.PrettyPrint+ Text.Pandoc.Extended
+ src/Data/Data/Extended.hs view
@@ -0,0 +1,23 @@+module Data.Data.Extended+ ( module Data.Data++ , grecQ+ , grecT+ ) where++import Data.Data++-- | Recursively find all values of a certain type.+grecQ :: (Data a, Data b) => a -> [b]+grecQ = concat . gmapQ (\x -> maybe id (:) (cast x) $ grecQ x)++-- | Recursively apply an update to a certain type.+grecT :: (Data a, Data b) => (a -> a) -> b -> b+grecT f x = gmapT (grecT f) (castMap f x)++castMap :: (Typeable a, Typeable b) => (a -> a) -> b -> b+castMap f x = case cast x of+ Nothing -> x+ Just y -> case cast (f y) of+ Nothing -> x+ Just z -> z
+ src/Main.hs view
@@ -0,0 +1,137 @@+--------------------------------------------------------------------------------+{-# LANGUAGE GeneralizedNewtypeDeriving #-}+{-# LANGUAGE OverloadedStrings #-}+{-# LANGUAGE RecordWildCards #-}+module Main where+++--------------------------------------------------------------------------------+import Control.Applicative ((<$>), (<*>))+import Control.Concurrent (forkIO, threadDelay)+import qualified Control.Concurrent.Chan as Chan+import Control.Monad (forever, unless, when)+import Data.Monoid ((<>))+import Data.Version (showVersion)+import qualified Options.Applicative as OA+import Patat.Presentation+import qualified Paths_patat+import qualified System.Console.ANSI as Ansi+import System.Directory (getModificationTime)+import System.Exit (exitFailure)+import qualified System.IO as IO+import qualified Text.PrettyPrint.ANSI.Leijen as PP+import Prelude+++--------------------------------------------------------------------------------+data Options = Options+ { oFilePath :: !FilePath+ , oForce :: !Bool+ , oDump :: !Bool+ , oWatch :: !Bool+ } deriving (Show)+++--------------------------------------------------------------------------------+parseOptions :: OA.Parser Options+parseOptions = Options+ <$> (OA.strArgument $+ OA.metavar "FILENAME" <>+ OA.help "Input file")+ <*> (OA.switch $+ OA.long "force" <>+ OA.short 'f' <>+ OA.help "Force ANSI terminal" <>+ OA.hidden)+ <*> (OA.switch $+ OA.long "dump" <>+ OA.short 'd' <>+ OA.help "Just dump all slides and exit" <>+ OA.hidden)+ <*> (OA.switch $+ OA.long "watch" <>+ OA.short 'w' <>+ OA.help "Watch file for changes")+++--------------------------------------------------------------------------------+parserInfo :: OA.ParserInfo Options+parserInfo = OA.info (OA.helper <*> parseOptions) $+ OA.fullDesc <>+ OA.header ("patat v" <> showVersion Paths_patat.version) <>+ OA.progDescDoc (Just desc)+ where+ desc = PP.vcat+ [ "Terminal-based presentations using Pandoc"+ , ""+ , "Controls:"+ , "- Next slide: space, enter, l, right"+ , "- Previous slide: backspace, h, left"+ , "- Go forward 10 slides: j, down"+ , "- Go backward 10 slides: k, up"+ , "- First slide: 0"+ , "- Last slide: G"+ , "- Reload file: r"+ , "- Quit: q"+ ]+++--------------------------------------------------------------------------------+errorAndExit :: [String] -> IO a+errorAndExit msg = do+ mapM_ (IO.hPutStrLn IO.stderr) msg+ exitFailure+++--------------------------------------------------------------------------------+assertAnsiFeatures :: IO ()+assertAnsiFeatures = do+ supports <- Ansi.hSupportsANSI IO.stdout+ unless supports $ errorAndExit+ [ "It looks like your terminal does not support ANSI codes."+ , "If you still want to run the presentation, use `--force`."+ ]+++--------------------------------------------------------------------------------+main :: IO ()+main = do+ options <- OA.execParser parserInfo+ errOrPres <- readPresentation (oFilePath options)+ pres <- either (errorAndExit . return) return errOrPres++ unless (oForce options) assertAnsiFeatures++ if oDump options+ then dumpPresentation pres+ else interactiveLoop options pres++ where+ interactiveLoop options pres0 = do+ IO.hSetBuffering IO.stdin IO.NoBuffering+ commandChan <- Chan.newChan++ _ <- forkIO $ forever $+ readPresentationCommand >>= Chan.writeChan commandChan++ mtime0 <- getModificationTime (pFilePath pres0)+ let watcher mtime = do+ mtime' <- getModificationTime (pFilePath pres0)+ when (mtime' > mtime) $ Chan.writeChan commandChan Reload+ threadDelay (200 * 1000)+ watcher mtime'++ when (oWatch options) $ do+ _ <- forkIO $ watcher mtime0+ return ()++ let loop pres = do+ displayPresentation pres+ c <- Chan.readChan commandChan+ update <- updatePresentation c pres+ case update of+ ExitedPresentation -> return ()+ UpdatedPresentation pres' -> loop pres'+ ErroredPresentation err -> errorAndExit [err]++ loop pres0
+ src/Patat/Presentation.hs view
@@ -0,0 +1,16 @@+module Patat.Presentation+ ( Presentation (..)+ , readPresentation+ , displayPresentation+ , dumpPresentation++ , PresentationCommand (..)+ , readPresentationCommand+ , UpdatedPresentation (..)+ , updatePresentation+ ) where++import Patat.Presentation.Display+import Patat.Presentation.Interactive+import Patat.Presentation.Internal+import Patat.Presentation.Read
+ src/Patat/Presentation/Display.hs view
@@ -0,0 +1,243 @@+--------------------------------------------------------------------------------+{-# LANGUAGE GeneralizedNewtypeDeriving #-}+{-# LANGUAGE OverloadedStrings #-}+{-# LANGUAGE RecordWildCards #-}+module Patat.Presentation.Display+ ( displayPresentation+ , dumpPresentation+ ) where+++--------------------------------------------------------------------------------+import Data.Data.Extended (grecQ)+import Data.List (intersperse)+import Data.Monoid (mconcat, mempty, (<>))+import Patat.Presentation.Display.Table+import Patat.Presentation.Internal+import Patat.PrettyPrint ((<$$>), (<+>))+import qualified Patat.PrettyPrint as PP+import qualified System.Console.ANSI as Ansi+import qualified System.Console.Terminal.Size as Terminal+import qualified Text.Pandoc.Extended as Pandoc+import Prelude+++--------------------------------------------------------------------------------+displayPresentation :: Presentation -> IO ()+displayPresentation Presentation {..} = do+ Ansi.clearScreen+ Ansi.setCursorPosition 0 0++ -- Get terminal width/title+ mbWindow <- Terminal.size+ let termWidth = maybe 72 Terminal.width mbWindow+ termHeight = maybe 24 Terminal.height mbWindow+ title = PP.toString (prettyInlines pTitle)+ titleWidth = length title+ titleOffset = (termWidth - titleWidth) `div` 2++ Ansi.setCursorColumn titleOffset+ PP.putDoc $ PP.dullyellow $ PP.string title+ putStrLn ""+ putStrLn ""++ let slide = case drop pActiveSlide pSlides of+ [] -> mempty+ (s : _) -> s++ PP.putDoc $ prettySlide slide+ putStrLn ""++ let active = show (pActiveSlide + 1) ++ " / " ++ show (length pSlides)+ activeWidth = length active++ Ansi.setCursorPosition (termHeight - 2) 0+ PP.putDoc $ " " <> PP.dullyellow (prettyInlines pAuthor)+ Ansi.setCursorColumn (termWidth - activeWidth - 1)+ PP.putDoc $ PP.dullyellow $ PP.string active+ putStrLn ""+++--------------------------------------------------------------------------------+dumpPresentation :: Presentation -> IO ()+dumpPresentation =+ PP.putDoc . PP.vcat . intersperse "----------" . map prettySlide . pSlides+++--------------------------------------------------------------------------------+prettySlide :: Slide -> PP.Doc+prettySlide slide@(Slide blocks) =+ prettyBlocks blocks <>+ case prettyReferences slide of+ [] -> mempty+ refs -> PP.newline <> PP.vcat refs+++--------------------------------------------------------------------------------+prettyBlock :: Pandoc.Block -> PP.Doc++prettyBlock (Pandoc.Plain inlines) = prettyInlines inlines++prettyBlock (Pandoc.Para inlines) = prettyInlines inlines <> PP.newline++prettyBlock (Pandoc.Header i _ inlines) =+ PP.dullblue (PP.string (replicate i '#') <+> prettyInlines inlines) <>+ PP.newline++prettyBlock (Pandoc.CodeBlock _ txt) = PP.vcat+ [ let ind = PP.NotTrimmable " " in+ PP.indent ind ind $ PP.ondullblack $ PP.dullwhite $ PP.string line+ | line <- blockified txt+ ] <> PP.newline+ where+ blockified str =+ let ls = lines str+ longest = foldr max 0 (map length ls)+ extend l = " " ++ l ++ replicate (longest - length l) ' ' ++ " " in+ map extend $ [""] ++ ls ++ [""]++prettyBlock (Pandoc.BulletList bss) = PP.vcat+ [ PP.indent+ (PP.NotTrimmable $ PP.dullmagenta " - ")+ (PP.Trimmable " ")+ (prettyBlocks bs)+ | bs <- bss+ ] <> PP.newline++prettyBlock (Pandoc.OrderedList _ bss) = PP.vcat+ [ PP.indent+ (PP.NotTrimmable $ PP.dullmagenta $ PP.string prefix)+ (PP.Trimmable " ")+ (prettyBlocks bs)+ | (prefix, bs) <- zip padded bss+ ] <> PP.newline+ where+ padded = [n ++ replicate (4 - length n) ' ' | n <- numbers]+ numbers =+ [ show i ++ "."+ | i <- [1 .. length bss]+ ]++prettyBlock (Pandoc.RawBlock _ t) = PP.string t <> PP.newline++prettyBlock Pandoc.HorizontalRule = "---"++prettyBlock (Pandoc.BlockQuote bs) =+ let quote = PP.NotTrimmable (PP.dullgreen "> ") in+ PP.indent quote quote (prettyBlocks bs)++prettyBlock (Pandoc.Table caption aligns _ headers rows) = prettyTable Table+ { tCaption = prettyInlines caption+ , tAligns = map align aligns+ , tHeaders = map prettyBlocks headers+ , tRows = map (map prettyBlocks) rows+ }+ where+ align Pandoc.AlignLeft = PP.AlignLeft+ align Pandoc.AlignCenter = PP.AlignCenter+ align Pandoc.AlignDefault = PP.AlignLeft+ align Pandoc.AlignRight = PP.AlignRight++prettyBlock (Pandoc.Div _attrs blocks) = prettyBlocks blocks++prettyBlock (Pandoc.DefinitionList terms) =+ PP.vcat $ map prettyDefinition terms+ where+ prettyDefinition (term, definitions) =+ PP.dullblue (prettyInlines term) <$$> PP.newline <> PP.vcat+ [ PP.indent+ (PP.NotTrimmable (PP.dullmagenta ": "))+ (PP.Trimmable " ") $+ prettyBlocks (Pandoc.plainToPara definition)+ | definition <- definitions+ ]++prettyBlock Pandoc.Null = mempty+++--------------------------------------------------------------------------------+prettyBlocks :: [Pandoc.Block] -> PP.Doc+prettyBlocks = PP.vcat . map prettyBlock+++--------------------------------------------------------------------------------+prettyInline :: Pandoc.Inline -> PP.Doc++prettyInline Pandoc.Space = PP.space++prettyInline (Pandoc.Str str) = PP.string str++prettyInline (Pandoc.Emph inlines) =+ PP.dullgreen $ prettyInlines inlines++prettyInline (Pandoc.Strong inlines) =+ PP.dullred $ PP.bold $ prettyInlines inlines++prettyInline (Pandoc.Code _ txt) =+ PP.ondullblack $ PP.dullwhite $ " " <> PP.string txt <> " "++prettyInline link@(Pandoc.Link _attrs text (target, _title))+ | isReferenceLink link =+ "[" <> PP.dullcyan (prettyInlines text) <> "]"+ | otherwise =+ "<" <> PP.dullcyan (PP.underline $ PP.string target) <> ">"++prettyInline Pandoc.SoftBreak = PP.newline++prettyInline Pandoc.LineBreak = PP.newline++prettyInline (Pandoc.Strikeout t) =+ "~~" <> PP.ondullred (prettyInlines t) <> "~~"++prettyInline (Pandoc.Quoted Pandoc.SingleQuote t) =+ "'" <> PP.dullgreen (prettyInlines t) <> "'"+prettyInline (Pandoc.Quoted Pandoc.DoubleQuote t) =+ "'" <> PP.dullgreen (prettyInlines t) <> "'"++prettyInline (Pandoc.Math _ t) = PP.dullgreen (PP.string t)++prettyInline (Pandoc.Image _ _ (tit, src)) =+ "![" <> PP.dullgreen (PP.string tit) <> "](" <>+ PP.dullcyan (PP.underline (PP.string src)) <> ")"++-- These elements aren't really supported.+prettyInline (Pandoc.Cite _ t) = prettyInlines t+prettyInline (Pandoc.Span _ t) = prettyInlines t+prettyInline (Pandoc.RawInline _ t) = PP.string t+prettyInline (Pandoc.Note t) = prettyBlocks t+prettyInline (Pandoc.Superscript t) = prettyInlines t+prettyInline (Pandoc.Subscript t) = prettyInlines t+prettyInline (Pandoc.SmallCaps t) = prettyInlines t+-- prettyInline unsupported = PP.ondullred $ PP.string $ show unsupported+++--------------------------------------------------------------------------------+prettyInlines :: [Pandoc.Inline] -> PP.Doc+prettyInlines = mconcat . map prettyInline+++--------------------------------------------------------------------------------+prettyReferences :: Slide -> [PP.Doc]+prettyReferences =+ map prettyReference . getReferences . unSlide+ where+ getReferences :: [Pandoc.Block] -> [Pandoc.Inline]+ getReferences = filter isReferenceLink . grecQ++ prettyReference :: Pandoc.Inline -> PP.Doc+ prettyReference (Pandoc.Link _attrs text (target, title)) =+ "[" <> PP.dullgreen (prettyInlines $ Pandoc.newlineToSpace text) <>+ "](" <>+ PP.dullcyan (PP.underline (PP.string target)) <>+ (if null title+ then mempty+ else PP.space <> "\"" <> PP.string title <> "\"")+ <> ")"+ prettyReference _ = mempty+++--------------------------------------------------------------------------------+isReferenceLink :: Pandoc.Inline -> Bool+isReferenceLink (Pandoc.Link _attrs text (target, _)) =+ [Pandoc.Str target] /= text+isReferenceLink _ = False
+ src/Patat/Presentation/Display/Table.hs view
@@ -0,0 +1,93 @@+--------------------------------------------------------------------------------+{-# LANGUAGE OverloadedStrings #-}+{-# LANGUAGE RecordWildCards #-}+module Patat.Presentation.Display.Table+ ( Table (..)+ , prettyTable+ ) where+++--------------------------------------------------------------------------------+import Data.List (intersperse, transpose)+import Data.Monoid (mconcat, mempty, (<>))+import Patat.PrettyPrint ((<$$>))+import qualified Patat.PrettyPrint as PP+import Prelude+++--------------------------------------------------------------------------------+data Table = Table+ { tCaption :: PP.Doc+ , tAligns :: [PP.Alignment]+ , tHeaders :: [PP.Doc]+ , tRows :: [[PP.Doc]]+ }+++--------------------------------------------------------------------------------+prettyTable+ :: Table -> PP.Doc+prettyTable Table {..} = PP.indent (PP.Trimmable " ") (PP.Trimmable " ") $+ lineIf (not isHeaderLess) (hcat2 headerHeight+ [ PP.dullblue (PP.align w a (vpad headerHeight header))+ | (w, a, header) <- zip3 columnWidths tAligns tHeaders+ ]) <>+ dashedHeaderSeparator columnWidths <$$>+ joinRows+ [ hcat2 rowHeight+ [ PP.align w a (vpad rowHeight cell)+ | (w, a, cell) <- zip3 columnWidths tAligns row+ ]+ | (rowHeight, row) <- zip rowHeights tRows+ ] <$$>+ lineIf isHeaderLess (dashedHeaderSeparator columnWidths) <>+ lineIf+ (not $ PP.null tCaption) (PP.newline <> "Table: " <> tCaption)+ where+ lineIf cond line = if cond then line <> PP.newline else mempty++ joinRows+ | all (all isSimpleCell) tRows = PP.vcat+ | otherwise = PP.vcat . intersperse ""++ isHeaderLess = all PP.null tHeaders++ headerDimensions = map PP.dimensions tHeaders :: [(Int, Int)]+ rowDimensions = map (map PP.dimensions) tRows :: [[(Int, Int)]]++ columnWidths :: [Int]+ columnWidths =+ [ safeMax (map snd col)+ | col <- transpose (headerDimensions : rowDimensions)+ ]++ rowHeights = map (safeMax . map fst) rowDimensions :: [Int]+ headerHeight = safeMax (map fst headerDimensions) :: Int++ vpad :: Int -> PP.Doc -> PP.Doc+ vpad height doc =+ let (actual, _) = PP.dimensions doc in+ doc <> mconcat (replicate (height - actual) PP.newline)++ safeMax = foldr max 0++ hcat2 :: Int -> [PP.Doc] -> PP.Doc+ hcat2 rowHeight = PP.paste . intersperse (spaces2 rowHeight)++ spaces2 :: Int -> PP.Doc+ spaces2 rowHeight =+ mconcat $ intersperse PP.newline $+ replicate rowHeight (PP.string " ")+++--------------------------------------------------------------------------------+isSimpleCell :: PP.Doc -> Bool+isSimpleCell = (<= 1) . fst . PP.dimensions+++--------------------------------------------------------------------------------+dashedHeaderSeparator :: [Int] -> PP.Doc+dashedHeaderSeparator columnWidths = mconcat $ intersperse (PP.string " ")+ [ PP.dullmagenta (PP.string (replicate w '-'))+ | w <- columnWidths+ ]
+ src/Patat/Presentation/Interactive.hs view
@@ -0,0 +1,100 @@+--------------------------------------------------------------------------------+-- | Module that allows the user to interact with the presentation+{-# LANGUAGE GeneralizedNewtypeDeriving #-}+{-# LANGUAGE OverloadedStrings #-}+{-# LANGUAGE RecordWildCards #-}+module Patat.Presentation.Interactive+ ( PresentationCommand (..)+ , readPresentationCommand++ , UpdatedPresentation (..)+ , updatePresentation+ ) where+++--------------------------------------------------------------------------------+import Patat.Presentation.Internal+import Patat.Presentation.Read+++--------------------------------------------------------------------------------+data PresentationCommand+ = Exit+ | Forward+ | Backward+ | SkipForward+ | SkipBackward+ | First+ | Last+ | Reload+++--------------------------------------------------------------------------------+readPresentationCommand :: IO PresentationCommand+readPresentationCommand = do+ k <- readKey+ case k of+ "q" -> return Exit+ "\n" -> return Forward+ "\DEL" -> return Backward+ "h" -> return Backward+ "j" -> return SkipForward+ "k" -> return SkipBackward+ "l" -> return Forward+ "\ESC[C" -> return Forward+ "\ESC[D" -> return Backward+ "\ESC[B" -> return SkipForward+ "\ESC[A" -> return SkipBackward+ "0" -> return First+ "G" -> return Last+ "r" -> return Reload+ _ -> readPresentationCommand+ where+ readKey :: IO String+ readKey = do+ c0 <- getChar+ case c0 of+ '\ESC' -> do+ c1 <- getChar+ case c1 of+ '[' -> do+ c2 <- getChar+ return [c0, c1, c2]+ _ -> return [c0, c1]+ _ -> return [c0]+++--------------------------------------------------------------------------------+data UpdatedPresentation+ = UpdatedPresentation !Presentation+ | ExitedPresentation+ | ErroredPresentation String+ deriving (Show)+++--------------------------------------------------------------------------------+updatePresentation+ :: PresentationCommand -> Presentation -> IO UpdatedPresentation++updatePresentation cmd presentation = case cmd of+ Exit -> return ExitedPresentation+ Forward -> return $ goToSlide (\x -> x + 1)+ Backward -> return $ goToSlide (\x -> x - 1)+ SkipForward -> return $ goToSlide (\x -> x + 10)+ SkipBackward -> return $ goToSlide (\x -> x - 10)+ First -> return $ goToSlide (\_ -> 0)+ Last -> return $ goToSlide (\_ -> numSlides - 1)+ Reload -> reloadPresentation+ where+ numSlides = length (pSlides presentation)+ clip idx = min (max 0 idx) (numSlides - 1)++ goToSlide f = UpdatedPresentation $+ presentation {pActiveSlide = clip (f $ pActiveSlide presentation)}++ reloadPresentation = do+ errOrPres <- readPresentation (pFilePath presentation)+ return $ case errOrPres of+ Left err -> ErroredPresentation err+ Right pres -> UpdatedPresentation $+ pres {pActiveSlide = clip (pActiveSlide presentation)}
+ src/Patat/Presentation/Internal.hs view
@@ -0,0 +1,27 @@+--------------------------------------------------------------------------------+{-# LANGUAGE GeneralizedNewtypeDeriving #-}+module Patat.Presentation.Internal+ ( Presentation (..)+ , Slide (..)+ ) where+++--------------------------------------------------------------------------------+import Data.Monoid (Monoid)+import qualified Text.Pandoc as Pandoc+import Prelude+++--------------------------------------------------------------------------------+data Presentation = Presentation+ { pFilePath :: !FilePath+ , pTitle :: ![Pandoc.Inline]+ , pAuthor :: ![Pandoc.Inline]+ , pSlides :: [Slide]+ , pActiveSlide :: !Int+ } deriving (Show)+++--------------------------------------------------------------------------------+newtype Slide = Slide {unSlide :: [Pandoc.Block]}+ deriving (Monoid, Show)
+ src/Patat/Presentation/Read.hs view
@@ -0,0 +1,80 @@+-- | Read a presentation from disk.+{-# LANGUAGE RecordWildCards #-}+module Patat.Presentation.Read+ ( readPresentation+ ) where+++--------------------------------------------------------------------------------+import qualified Data.Set as Set+import Patat.Presentation.Internal+import System.FilePath (takeExtension)+import qualified Text.Pandoc as Pandoc+import qualified Text.Pandoc.Error as Pandoc+++--------------------------------------------------------------------------------+readPresentation :: FilePath -> IO (Either String Presentation)+readPresentation filePath = do+ src <- readFile filePath+ return $ do+ reader <- case readExtension ext of+ Nothing -> Left $ "Unknown extension: " ++ ext+ Just r -> Right r++ doc <- case reader src of+ Left err -> Left $ "Pandoc parsing error: " ++ show err+ Right x -> Right x++ pandocToPresentation filePath doc+ where+ ext = takeExtension filePath+++--------------------------------------------------------------------------------+readExtension+ :: String -> Maybe (String -> Either Pandoc.PandocError Pandoc.Pandoc)+readExtension fileExt = case fileExt of+ ".md" -> Just $ Pandoc.readMarkdown Pandoc.def+ ".lhs" -> Just $ Pandoc.readMarkdown lhsOpts+ "" -> Just $ Pandoc.readMarkdown Pandoc.def+ _ -> Nothing++ where+ lhsOpts = Pandoc.def+ { Pandoc.readerExtensions = Set.insert Pandoc.Ext_literate_haskell+ (Pandoc.readerExtensions Pandoc.def)+ }+++--------------------------------------------------------------------------------+pandocToPresentation+ :: FilePath -> Pandoc.Pandoc -> Either String Presentation+pandocToPresentation pFilePath pandoc@(Pandoc.Pandoc meta _) = do+ let pTitle = Pandoc.docTitle meta+ pSlides = pandocToSlides pandoc+ pActiveSlide = 0+ pAuthor = concat (Pandoc.docAuthors meta)+ return Presentation {..}+++--------------------------------------------------------------------------------+-- | Split a pandoc document into slides. If the document contains horizonal+-- rules, we use those as slide delimiters. If there are no horizontal rules,+-- we split using h1 headers.+pandocToSlides :: Pandoc.Pandoc -> [Slide]+pandocToSlides (Pandoc.Pandoc _meta blocks0)+ | any (== Pandoc.HorizontalRule) blocks0 = splitAtRules blocks0+ | otherwise = splitAtH1s blocks0+ where+ splitAtRules blocks = case break (== Pandoc.HorizontalRule) blocks of+ (xs, []) -> [Slide xs]+ (xs, (_rule : ys)) -> Slide xs : splitAtRules ys++ splitAtH1s [] = []+ splitAtH1s (b : bs) = case break isH1 bs of+ (xs, []) -> [Slide (b : xs)]+ (xs, (y : ys)) -> Slide (b : xs) : splitAtH1s (y : ys)++ isH1 (Pandoc.Header i _ _) = i == 1+ isH1 _ = False
+ src/Patat/PrettyPrint.hs view
@@ -0,0 +1,386 @@+--------------------------------------------------------------------------------+-- | This is a small pretty-printing library.+{-# LANGUAGE DeriveFoldable #-}+{-# LANGUAGE DeriveFunctor #-}+{-# LANGUAGE DeriveTraversable #-}+{-# LANGUAGE GeneralizedNewtypeDeriving #-}+{-# LANGUAGE RecordWildCards #-}+module Patat.PrettyPrint+ ( Doc+ , toString+ , dimensions+ , null++ , hPutDoc+ , putDoc++ , string+ , space+ , newline++ , Trimmable (..)+ , indent++ , (<+>)+ , (<$$>)+ , vcat++ , bold+ , underline++ , dullblack+ , dullred+ , dullgreen+ , dullyellow+ , dullblue+ , dullmagenta+ , dullcyan+ , dullwhite++ , ondullblack+ , ondullred++ -- * Exotic combinators+ , Alignment (..)+ , align+ , paste+ ) where+++--------------------------------------------------------------------------------+import Control.Monad.Reader (asks, local)+import Control.Monad.RWS (RWS, runRWS)+import Control.Monad.State (get, modify)+import Control.Monad.Writer (tell)+import Data.Foldable (Foldable)+import qualified Data.List as L+import Data.Monoid (Monoid, mconcat, mempty, (<>))+import Data.String (IsString (..))+import Data.Traversable (Traversable, traverse)+import qualified System.Console.ANSI as Ansi+import qualified System.IO as IO+import Prelude hiding (null)+++--------------------------------------------------------------------------------+-- | A simple chunk of text. All ANSI codes are "reset" after printing.+data Chunk+ = StringChunk [Ansi.SGR] String+ | NewlineChunk+ deriving (Eq)+++--------------------------------------------------------------------------------+type Chunks = [Chunk]+++--------------------------------------------------------------------------------+hPutChunk :: IO.Handle -> Chunk -> IO ()+hPutChunk h NewlineChunk = IO.hPutStrLn h ""+hPutChunk h (StringChunk codes str) = do+ Ansi.hSetSGR h (reverse codes)+ IO.hPutStr h str+ Ansi.hSetSGR h [Ansi.Reset]+++--------------------------------------------------------------------------------+chunkToString :: Chunk -> String+chunkToString NewlineChunk = "\n"+chunkToString (StringChunk _ str) = str+++--------------------------------------------------------------------------------+-- | If two neighboring chunks have the same set of ANSI codes, we can group+-- them together.+optimizeChunks :: Chunks -> Chunks+optimizeChunks (StringChunk c1 s1 : StringChunk c2 s2 : chunks)+ | c1 == c2 = optimizeChunks (StringChunk c1 (s1 <> s2) : chunks)+ | otherwise =+ StringChunk c1 s1 : optimizeChunks (StringChunk c2 s2 : chunks)+optimizeChunks (x : chunks) = x : optimizeChunks chunks+optimizeChunks [] = []+++--------------------------------------------------------------------------------+chunkLines :: Chunks -> [Chunks]+chunkLines chunks = case break (== NewlineChunk) chunks of+ (xs, _newline : ys) -> xs : chunkLines ys+ (xs, []) -> [xs]+++--------------------------------------------------------------------------------+data DocE+ = String String+ | Space+ | Newline+ | Ansi+ { ansiCode :: [Ansi.SGR] -> [Ansi.SGR] -- ^ Modifies current codes.+ , ansiDoc :: Doc+ }+ | Indent+ { indentFirstLine :: LineBuffer+ , indentOtherLines :: LineBuffer+ , indentDoc :: Doc+ }+++--------------------------------------------------------------------------------+chunkToDocE :: Chunk -> DocE+chunkToDocE NewlineChunk = Newline+chunkToDocE (StringChunk codes str) = Ansi (\_ -> codes) (Doc [String str])+++--------------------------------------------------------------------------------+newtype Doc = Doc {unDoc :: [DocE]}+ deriving (Monoid)+++--------------------------------------------------------------------------------+instance IsString Doc where+ fromString = string+++--------------------------------------------------------------------------------+instance Show Doc where+ show = toString+++--------------------------------------------------------------------------------+data DocEnv = DocEnv+ { deCodes :: [Ansi.SGR] -- ^ Most recent ones first in the list+ , deIndent :: LineBuffer -- ^ Don't need to store first-line indent+ }+++--------------------------------------------------------------------------------+type DocM = RWS DocEnv Chunks LineBuffer+++--------------------------------------------------------------------------------+data Trimmable a+ = NotTrimmable !a+ | Trimmable !a+ deriving (Foldable, Functor, Traversable)+++--------------------------------------------------------------------------------+-- | Note that this is reversed so we have fast append+type LineBuffer = [Trimmable Chunk]+++--------------------------------------------------------------------------------+bufferToChunks :: LineBuffer -> Chunks+bufferToChunks = map trimmableToChunk . reverse . dropWhile isTrimmable+ where+ isTrimmable (NotTrimmable _) = False+ isTrimmable (Trimmable _) = True++ trimmableToChunk (NotTrimmable c) = c+ trimmableToChunk (Trimmable c) = c+++--------------------------------------------------------------------------------+docToChunks :: Doc -> Chunks+docToChunks doc0 =+ let env0 = DocEnv [] []+ ((), b, cs) = runRWS (go $ unDoc doc0) env0 mempty in+ optimizeChunks (cs <> bufferToChunks b)+ where+ go :: [DocE] -> DocM ()++ go [] = return ()++ go (String str : docs) = do+ chunk <- makeChunk str+ modify (NotTrimmable chunk :)+ go docs++ go (Space : docs) = do+ chunk <- makeChunk " "+ modify (NotTrimmable chunk :)+ go docs++ go (Newline : docs) = do+ buffer <- get+ tell $ bufferToChunks buffer <> [NewlineChunk]+ indentation <- asks deIndent+ modify $ \_ -> if L.null docs then [] else indentation+ go docs++ go (Ansi {..} : docs) = do+ local (\env -> env {deCodes = ansiCode (deCodes env)}) $+ go (unDoc ansiDoc)+ go docs++ go (Indent {..} : docs) = do+ local (\env -> env {deIndent = indentOtherLines ++ deIndent env}) $ do+ modify (indentFirstLine ++)+ go (unDoc indentDoc)+ go docs++ makeChunk :: String -> DocM Chunk+ makeChunk str = do+ codes <- asks deCodes+ return $ StringChunk codes str+++--------------------------------------------------------------------------------+toString :: Doc -> String+toString = concat . map chunkToString . docToChunks+++--------------------------------------------------------------------------------+-- | Returns the rows and columns necessary to render this document+dimensions :: Doc -> (Int, Int)+dimensions doc =+ let ls = lines (toString doc) in+ (length ls, foldr max 0 (map length ls))+++--------------------------------------------------------------------------------+null :: Doc -> Bool+null doc = case unDoc doc of [] -> True; _ -> False+++--------------------------------------------------------------------------------+hPutDoc :: IO.Handle -> Doc -> IO ()+hPutDoc h = mapM_ (hPutChunk h) . docToChunks+++--------------------------------------------------------------------------------+putDoc :: Doc -> IO ()+putDoc = hPutDoc IO.stdout+++--------------------------------------------------------------------------------+mkDoc :: DocE -> Doc+mkDoc e = Doc [e]+++--------------------------------------------------------------------------------+string :: String -> Doc+string = mkDoc . String -- TODO (jaspervdj): Newline conversion+++--------------------------------------------------------------------------------+space :: Doc+space = mkDoc Space+++--------------------------------------------------------------------------------+newline :: Doc+newline = mkDoc Newline+++--------------------------------------------------------------------------------+indent :: Trimmable Doc -> Trimmable Doc -> Doc -> Doc+indent firstLineDoc otherLinesDoc doc = mkDoc $ Indent+ { indentFirstLine = traverse docToChunks firstLineDoc+ , indentOtherLines = traverse docToChunks otherLinesDoc+ , indentDoc = doc+ }+++--------------------------------------------------------------------------------+(<+>) :: Doc -> Doc -> Doc+x <+> y = x <> space <> y+infixr 6 <+>+++--------------------------------------------------------------------------------+(<$$>) :: Doc -> Doc -> Doc+x <$$> y = x <> newline <> y+infixr 5 <$$>+++--------------------------------------------------------------------------------+vcat :: [Doc] -> Doc+vcat = mconcat . L.intersperse newline+++--------------------------------------------------------------------------------+bold :: Doc -> Doc+bold = mkDoc . Ansi+ (\codes -> Ansi.SetConsoleIntensity Ansi.BoldIntensity : codes)+++--------------------------------------------------------------------------------+underline :: Doc -> Doc+underline = mkDoc . Ansi+ (\codes -> Ansi.SetUnderlining Ansi.SingleUnderline : codes)+++--------------------------------------------------------------------------------+dullcolor :: Ansi.Color -> Doc -> Doc+dullcolor c = mkDoc . Ansi+ (\codes -> Ansi.SetColor Ansi.Foreground Ansi.Dull c : codes)+++--------------------------------------------------------------------------------+dullblack, dullred, dullgreen, dullyellow, dullblue, dullmagenta, dullcyan,+ dullwhite :: Doc -> Doc+dullblack = dullcolor Ansi.Black+dullred = dullcolor Ansi.Red+dullgreen = dullcolor Ansi.Green+dullyellow = dullcolor Ansi.Yellow+dullblue = dullcolor Ansi.Blue+dullmagenta = dullcolor Ansi.Magenta+dullcyan = dullcolor Ansi.Cyan+dullwhite = dullcolor Ansi.White+++--------------------------------------------------------------------------------+ondullcolor :: Ansi.Color -> Doc -> Doc+ondullcolor c = mkDoc . Ansi+ (\codes -> Ansi.SetColor Ansi.Background Ansi.Dull c : codes)+++--------------------------------------------------------------------------------+ondullblack :: Doc -> Doc+ondullblack = ondullcolor Ansi.Black+++--------------------------------------------------------------------------------+ondullred :: Doc -> Doc+ondullred = ondullcolor Ansi.Red+++--------------------------------------------------------------------------------+data Alignment = AlignLeft | AlignCenter | AlignRight deriving (Eq, Ord, Show)+++--------------------------------------------------------------------------------+align :: Int -> Alignment -> Doc -> Doc+align width alignment doc0 =+ let chunks0 = docToChunks doc0+ lines_ = chunkLines chunks0 in+ vcat+ [ Doc (map chunkToDocE (alignLine line))+ | line <- lines_+ ]+ where+ lineWidth :: [Chunk] -> Int+ lineWidth = sum . map (length . chunkToString)++ alignLine :: [Chunk] -> [Chunk]+ alignLine line =+ let actual = lineWidth line+ spaces n = [StringChunk [] (replicate n ' ')] in+ case alignment of+ AlignLeft -> line <> spaces (width - actual)+ AlignRight -> spaces (width - actual) <> line+ AlignCenter ->+ let r = (width - actual) `div` 2+ l = (width - actual) - r in+ spaces l <> line <> spaces r+++--------------------------------------------------------------------------------+-- | Like the unix program 'paste'.+paste :: [Doc] -> Doc+paste docs0 =+ let chunkss = map docToChunks docs0 :: [Chunks]+ cols = map chunkLines chunkss :: [[Chunks]]+ rows0 = L.transpose cols :: [[Chunks]]+ rows1 = map (map (Doc . map chunkToDocE)) rows0 :: [[Doc]] in+ vcat $ map mconcat rows1
+ src/Text/Pandoc/Extended.hs view
@@ -0,0 +1,21 @@+{-# LANGUAGE LambdaCase #-}+module Text.Pandoc.Extended+ ( module Text.Pandoc++ , plainToPara+ , newlineToSpace+ ) where++import Text.Pandoc+import Data.Data.Extended (grecT)++plainToPara :: [Block] -> [Block]+plainToPara = map $ \case+ Plain inlines -> Para inlines+ block -> block++newlineToSpace :: [Inline] -> [Inline]+newlineToSpace = grecT $ \case+ SoftBreak -> Space+ LineBreak -> Space+ inline -> inline