-import StdDebug, StdMisc
-
-derive class iTask RTree, FileInfo, Tm
-
-Start w = startEngine (selecter "/home/mrl/projects" 2) w
-
-recurseDirectory :: Int FilePath FilePath *World -> *(MaybeOSError (RTree (FilePath, Bool)), *World)
-recurseDirectory maxdepth acc fp w
-# fp = acc </> fp
-= case getFileInfo fp w of
- (Error (i, e), w) = (Error (i, e +++ " in fileinfo " +++ fp), w)
- (Ok fi, w)
- | not fi.directory = (Ok $ RNode (fp, False) [], w)
- = case readDirectory fp w of
- (Error (i, e), w) = (Error (i, e +++ " in readDir " +++ fp), w)
- (Ok cs, w)
- | maxdepth == 0 = (Ok $ RNode (fp, True) [], w)
- = appFst ((fmap $ RNode (fp, True)) o 'M'.sequence)
- $ mapSt (recurseDirectory (maxdepth - 1) fp) (filter real cs) w
-where
- real i = IF_POSIX (i <> ".." && i <> ".") True
-
-selecter :: !FilePath Int -> Task String
-selecter fp maxdepth = accWorldOSError (recurseDirectory maxdepth fp "")
- >>= \ds->editSelection "Examples" False (SelectInTree (\x->[evalState (toTree x) 0]) fromTree) ds []
- @? tvHd
-where
- toTree :: (RTree (FilePath, Bool)) -> State Int ChoiceNode
- toTree (RNode (fp, _) forest)
- = getState `b` \i->put (i+1) `b` \_->mapM toTree forest `b` \cs->pure
- {id=i,label=bn fp,icon=Nothing,expanded=i==0,children=cs}
-
- bn :: FilePath -> FilePath
- bn x = if (endsWith {pathSeparator} x) (bn $ fst $ splitFileName x) (dropDirectory x)
-
- fromTree :: (RTree (FilePath, Bool)) [Int] -> [FilePath]
- fromTree t [i] = map fst $ filter (not o snd) [foldTree (\f fs->[f:flatten fs]) t !! i]