35 lines
1.1 KiB
Haskell
35 lines
1.1 KiB
Haskell
import Control.Monad ((>=>))
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import qualified Data.ByteString.Char8 as BS (readFile)
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import qualified Data.Map as Map (toList)
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import qualified Data.Text.IO as Text (putStrLn)
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import PDF (UnifiedLayers(..), parseDocument)
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import PDF.Box (Box(..))
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import PDF.Layer (Layer)
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import PDF.Pages (Page(..), PageNumber(..), Pages(..), cacheFonts)
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import System.Environment (getArgs)
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import System.Exit (die)
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import System.IO (BufferMode(..), hSetBuffering, stdout)
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displayPage :: Page -> IO ()
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displayPage = mapM_ Text.putStrLn . contents
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getAll :: Layer -> IO ()
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getAll layer = (cacheFonts $ r Pages layer) >>= mapM_ (displayPage . snd) . Map.toList
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get :: Int -> Layer -> IO ()
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get n layer = (cacheFonts $ r (P n) layer) >>= displayPage
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onDoc :: FilePath -> (Layer -> IO ()) -> IO ()
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onDoc inputFile f = do
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(parseDocument <$> BS.readFile inputFile)
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>>= either die (r UnifiedLayers >=> f)
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main :: IO ()
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main = do
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hSetBuffering stdout LineBuffering
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args <- getArgs
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case args of
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[inputFile] -> onDoc inputFile getAll
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[inputFile, pageNumber] -> onDoc inputFile (get $ read pageNumber)
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_ -> die "Syntax: getText INPUT_FILE [PAGE_NUMBER]"
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