Data.Text.Zipper
data TextZipper a
mkZipper
textZipper
stringZipper
vectorZipper
getText
currentLine
cursorPosition
lineLengths
getLineLimit
moveCursor
insertChar
breakLine
killToEOL
gotoEOL
gotoBOL
deletePrevChar
deleteChar
moveRight
moveLeft
moveUp
moveDown