From 17998a5e8d386b58d30d138ea8dbc565955cccc6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Roman=20Smr=C5=BE?= <roman.smrz@seznam.cz>
Date: Sat, 11 Jan 2025 19:33:54 +0100
Subject: Concurrently run jobs for multiple commits

Changelog: Concurrently run jobs for multiple commits
---
 src/Terminal.hs | 45 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 src/Terminal.hs

(limited to 'src/Terminal.hs')

diff --git a/src/Terminal.hs b/src/Terminal.hs
new file mode 100644
index 0000000..bf50c58
--- /dev/null
+++ b/src/Terminal.hs
@@ -0,0 +1,45 @@
+module Terminal (
+    TerminalOutput,
+    TerminalLine,
+    initTerminalOutput,
+    newLine,
+    redrawLine,
+) where
+
+import Control.Concurrent
+
+import Data.Text (Text)
+import Data.Text qualified as T
+import Data.Text.IO qualified as T
+
+import System.IO
+
+
+data TerminalOutput = TerminalOutput
+    { outNumLines :: MVar Int
+    }
+
+data TerminalLine = TerminalLine
+    { lineOutput :: TerminalOutput
+    , lineNum :: Int
+    }
+
+initTerminalOutput :: IO TerminalOutput
+initTerminalOutput = do
+    outNumLines <- newMVar 0
+    return TerminalOutput {..}
+
+newLine :: TerminalOutput -> Text -> IO TerminalLine
+newLine lineOutput@TerminalOutput {..} text = do
+    modifyMVar outNumLines $ \lineNum -> do
+        T.putStrLn text
+        hFlush stdout
+        return ( lineNum + 1, TerminalLine {..} )
+
+redrawLine :: TerminalLine -> Text -> IO ()
+redrawLine TerminalLine {..} text = do
+    let TerminalOutput {..} = lineOutput
+    withMVar outNumLines $ \total -> do
+        let moveBy = total - lineNum
+        T.putStr $ "\ESC[s\ESC[" <> T.pack (show moveBy) <> "F" <> text <> "\ESC[u"
+        hFlush stdout
-- 
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