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module Daffm.Event where
import Brick (suspendAndResume')
import qualified Brick.Main as M
import qualified Brick.Types as T
import qualified Brick.Widgets.Edit as Editor
import qualified Brick.Widgets.List as L
import Control.Monad.State (MonadIO (liftIO), MonadState, get, gets, modify, put)
import Daffm.State (cacheDirPosition, loadDirInAppState)
import Daffm.Types (AppEvent, AppState (..), FileInfo (..), FileType (..), FocusTarget (..))
import Data.Char (isSpace)
import Data.List (dropWhileEnd)
import qualified Data.Text as Text
import Data.Text.Array (run)
import qualified Data.Text.Zipper as Z
import Data.Vector ((!?))
import qualified Graphics.Vty as V
import System.FilePath (takeDirectory)
import System.Process (callCommand, callProcess)
modifyM :: (MonadState s m) => (s -> m s) -> m ()
modifyM f = get >>= f >>= put
appEvent :: T.BrickEvent FocusTarget e -> AppEvent ()
appEvent brickevent@(T.VtyEvent event) = do
focusTarget <- gets stateFocusTarget
case (focusTarget, event) of
(FocusMain, V.EvKey (V.KChar 'l') []) -> openSelectedFile
(FocusMain, V.EvKey (V.KChar 'h') []) -> goBackToParentDir
(FocusMain, V.EvKey V.KEnter []) -> openSelectedFile
(FocusMain, V.EvKey V.KBS []) -> goBackToParentDir
(FocusMain, V.EvKey (V.KChar ':') []) -> enterCmdline
(FocusMain, V.EvKey (V.KChar 'q') []) -> M.halt
(FocusMain, V.EvKey (V.KChar 'r') [V.MCtrl]) -> reloadDir
(FocusCmdline, V.EvKey V.KEsc []) -> leaveCmdline
(FocusCmdline, V.EvKey V.KEnter []) -> runCmdline
(FocusMain, _) -> do
files <- gets stateFiles
newFiles <- T.nestEventM' files (L.handleListEventVi L.handleListEvent event)
modify (\appState -> appState {stateFiles = newFiles})
(FocusCmdline, _) -> do
editor <- gets stateCmdlineEditor
newEditor <- T.nestEventM' editor (Editor.handleEditorEvent brickevent)
modify (\appState -> appState {stateCmdlineEditor = newEditor})
modify cacheDirPosition
appEvent _ = pure ()
leaveCmdline :: AppEvent ()
leaveCmdline = clearEditor >> modify (\st -> st {stateFocusTarget = FocusMain})
enterCmdline :: AppEvent ()
enterCmdline = modify (\st -> st {stateFocusTarget = FocusCmdline})
cmdSubstitutions :: Text.Text -> AppEvent Text.Text
cmdSubstitutions cmd = do
appState <- get
let file = maybe "" (filePath . snd) . L.listSelectedElement . stateFiles $ appState
-- TODO: Escaping %
let subst =
Text.replace "%" (Text.pack file)
. Text.replace "%d" (Text.pack $ stateCwd appState)
pure . subst $ cmd
runCmdline :: AppEvent ()
runCmdline = do
cmd <- gets (trimCmd . Editor.getEditContents . stateCmdlineEditor)
evaluateCommand cmd
leaveCmdline
where
trimCmd = dropWhile isSpace . dropWhileEnd isSpace . unlines
evaluateCommand :: String -> AppEvent ()
evaluateCommand ('!' : cmd) = do
cmd' <- Text.unpack <$> cmdSubstitutions (Text.pack cmd)
suspendAndResume' $ callCommand cmd'
reloadDir
evaluateCommand _cmd = pure ()
clearEditor :: AppEvent ()
clearEditor = do
editor <- gets stateCmdlineEditor
let editor' = Editor.applyEdit Z.clearZipper editor
modify (\s -> s {stateCmdlineEditor = editor'})
reloadDir :: AppEvent ()
reloadDir = do
AppState {stateParentDir, stateCwd} <- get
modifyM (liftIO . loadDirInAppState stateCwd stateParentDir)
openSelectedFile :: AppEvent ()
openSelectedFile = do
AppState {stateFiles, stateCwd} <- get
let indexM = L.listSelected stateFiles
let files = L.listElements stateFiles
case indexM >>= (files !?) of
Just (FileInfo {filePath, fileType = Directory}) ->
modifyM (liftIO . loadDirInAppState filePath stateCwd)
Just (FileInfo {filePath, fileType}) -> do
suspendAndResume' $ do
putStrLn $ "Opening " <> show fileType <> ": " <> filePath
callProcess "nvim" [filePath]
pure ()
Nothing -> pure ()
pure ()
goBackToParentDir :: AppEvent ()
goBackToParentDir = do
dir <- gets stateParentDir
modifyM (liftIO . loadDirInAppState dir (takeDirectory dir))
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