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|
{- Copyright 2016 Joey Hess <id@joeyh.name>
-
- Licensed under the GNU AGPL version 3 or higher.
-}
{-# LANGUAGE BangPatterns #-}
module UI (module UI, module Types.UI) where
import Types.UI
import Control.Monad
import UI.Zenity
import UI.Readline
import UI.NonInteractive
import Control.Concurrent.MVar
availableUIs :: IO [UI]
availableUIs = filterM isAvailable [readlineUI, zenityUI]
selectUI :: Bool -> IO UI
selectUI needgui
| needgui = do
ok <- isAvailable zenityUI
if ok
then return zenityUI
else error "zenity is not installed, GUI not available"
| otherwise = do
l <- availableUIs
case l of
(u:_) -> return u
[] -> return noninteractiveUI
-- Adds a percent to whatever amount the progress bar is at.
type AddPercent = Percent -> IO ()
withProgressIncremental :: UI -> Title -> Desc -> (AddPercent -> IO a) -> IO a
withProgressIncremental ui title desc a =
withProgress ui title desc $ \setpercent -> do
v <- newMVar 0
let addpercent = \p -> do
oldp <- takeMVar v
let !newp = oldp + p
putMVar v newp
setpercent newp
a addpercent
|
