{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE QuasiQuotes #-}
{-# LANGUAGE RecordWildCards #-}
{-# LANGUAGE NoImplicitPrelude #-}

-- |

-- Module      : $header$

-- Copyright   : (c) Laurent P René de Cotret, 2020

-- License     : GNU GPL, version 2 or above

-- Maintainer  : laurent.decotret@outlook.com

-- Stability   : internal

-- Portability : portable

--

-- Rendering Graphviz plots code blocks

module Text.Pandoc.Filter.Plot.Renderers.Graphviz
  ( graphvizSupportedSaveFormats,
    graphvizCommand,
    graphvizCapture,
    graphvizAvailable,
  )
where

import Data.Char
import Text.Pandoc.Filter.Plot.Renderers.Prelude

graphvizSupportedSaveFormats :: [SaveFormat]
graphvizSupportedSaveFormats :: [SaveFormat]
graphvizSupportedSaveFormats = [SaveFormat
PNG, SaveFormat
PDF, SaveFormat
SVG, SaveFormat
JPG, SaveFormat
EPS, SaveFormat
WEBP, SaveFormat
GIF]

graphvizCommand :: OutputSpec -> Text -> Text
graphvizCommand :: OutputSpec -> Text -> Text
graphvizCommand OutputSpec {FilePath
FigureSpec
oFigurePath :: OutputSpec -> FilePath
oScriptPath :: OutputSpec -> FilePath
oFigureSpec :: OutputSpec -> FigureSpec
oFigurePath :: FilePath
oScriptPath :: FilePath
oFigureSpec :: FigureSpec
..} Text
exe =
  let fmt :: FilePath
fmt = (Char -> Char) -> FilePath -> FilePath
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap Char -> Char
toLower (FilePath -> FilePath)
-> (FigureSpec -> FilePath) -> FigureSpec -> FilePath
forall b c a. (b -> c) -> (a -> b) -> a -> c
. SaveFormat -> FilePath
forall a. Show a => a -> FilePath
show (SaveFormat -> FilePath)
-> (FigureSpec -> SaveFormat) -> FigureSpec -> FilePath
forall b c a. (b -> c) -> (a -> b) -> a -> c
. FigureSpec -> SaveFormat
saveFormat (FigureSpec -> FilePath) -> FigureSpec -> FilePath
forall a b. (a -> b) -> a -> b
$ FigureSpec
oFigureSpec
      dpi' :: Int
dpi' = FigureSpec -> Int
dpi FigureSpec
oFigureSpec
   in [st|#{exe} -T#{fmt} -Gdpi=#{dpi'} -o "#{oFigurePath}" "#{oScriptPath}"|]

graphvizAvailable :: PlotM Bool
graphvizAvailable :: PlotM Bool
graphvizAvailable = do
  Maybe Executable
mexe <- Toolkit -> PlotM (Maybe Executable)
executable Toolkit
Graphviz
  case Maybe Executable
mexe of
    Maybe Executable
Nothing -> Bool -> PlotM Bool
forall (m :: * -> *) a. Monad m => a -> m a
return Bool
False
    Just (Executable FilePath
dir Text
exe) ->
      FilePath -> Text -> PlotM Bool
commandSuccess FilePath
dir [st|#{exe} -?|]

-- Graphviz export is entirely based on command-line arguments

-- so there is no need to modify the script itself.

graphvizCapture :: FigureSpec -> FilePath -> Script
graphvizCapture :: FigureSpec -> FilePath -> Text
graphvizCapture FigureSpec {Bool
Int
FilePath
[FilePath]
[(Text, Text)]
Attr
Text
SaveFormat
Toolkit
blockAttrs :: FigureSpec -> Attr
extraAttrs :: FigureSpec -> [(Text, Text)]
dependencies :: FigureSpec -> [FilePath]
directory :: FigureSpec -> FilePath
script :: FigureSpec -> Text
withSource :: FigureSpec -> Bool
caption :: FigureSpec -> Text
toolkit :: FigureSpec -> Toolkit
blockAttrs :: Attr
extraAttrs :: [(Text, Text)]
dependencies :: [FilePath]
dpi :: Int
directory :: FilePath
saveFormat :: SaveFormat
script :: Text
withSource :: Bool
caption :: Text
toolkit :: Toolkit
dpi :: FigureSpec -> Int
saveFormat :: FigureSpec -> SaveFormat
..} FilePath
_ = Text
script