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|
{- Copyright 2016 Joey Hess <id@joeyh.name>
-
- Licensed under the GNU AGPL version 3 or higher.
-}
module UI.Zenity (zenityUI) where
import Types
import Types.UI
import Control.Monad
import System.Process
import Control.Exception
import System.IO
import System.FilePath
import System.Directory
import System.Exit
import qualified Data.ByteString.UTF8 as BU8
import qualified Data.Text as T
zenityUI :: UI
zenityUI = UI
{ isAvailable = do
ps <- getSearchPath
loc <- filterM (\p -> doesFileExist (p </> "zenity")) ps
return (not (null loc))
, showError = myShowError
, showInfo = myShowInfo
, promptQuestion = myPromptQuestion
, promptName = myPromptName
, promptPassword = myPromptPassword
, promptKeyId = myPromptKeyId
, withProgress = myWithProgress
}
myShowError :: Desc -> IO ()
myShowError desc = bracket go cleanup (\_ -> return ())
where
go = runZenity
[ "--error"
, "--title", "keysafe"
, "--text", "Error: " ++ escape desc
]
cleanup h = do
_ <- waitZenity h
return ()
myShowInfo :: Title -> Desc -> IO ()
myShowInfo title desc = bracket go cleanup (\_ -> return ())
where
go = runZenity
[ "--info"
, "--title", title
, "--text", escape desc
]
cleanup h = do
_ <- waitZenity h
return ()
myPromptQuestion :: Title -> Desc -> Question -> IO Bool
myPromptQuestion title desc question = do
h <- runZenity
[ "--question"
, "--title", title
, "--text", escape $ desc ++ "\n" ++ question
]
(_, ok) <- waitZenity h
return ok
myPromptName :: Title -> Desc -> Maybe Name -> (Name -> Maybe Problem) -> IO (Maybe Name)
myPromptName title desc suggested checkproblem = go ""
where
go extradesc = do
h <- runZenity
[ "--entry"
, "--title", title
, "--text", escape $ desc ++ "\n" ++ extradesc
, "--entry-text", case suggested of
Nothing -> ""
Just (Name b) -> BU8.toString b
]
(ret, ok) <- waitZenity h
if ok
then
let n = Name $ BU8.fromString ret
in case checkproblem n of
Nothing -> return $ Just n
Just problem -> go problem
else return Nothing
myPromptPassword :: Bool -> Title -> Desc -> IO (Maybe Password)
myPromptPassword confirm title desc = go ""
where
go extradesc = do
h <- runZenity $
[ "--forms"
, "--title", title
, "--text", escape $ desc ++ "\n" ++ extradesc ++ "\n"
, "--separator", "\BEL"
, "--add-password", "Enter password"
] ++ if confirm
then [ "--add-password", "Confirm password" ]
else []
(ret, ok) <- waitZenity h
if ok
then if confirm
then
let (p1, _:p2) = break (== '\BEL') ret
in if p1 /= p2
then go "Passwords didn't match, try again..."
else return $ Just $ Password $ BU8.fromString p1
else return $ Just $ Password $ BU8.fromString ret
else return Nothing
myPromptKeyId :: Title -> Desc -> [(Name, KeyId)] -> IO (Maybe KeyId)
myPromptKeyId _ _ [] = return Nothing
myPromptKeyId title desc l = do
h <- runZenity $
[ "--list"
, "--title", title
, "--text", escape desc
, "--column", "gpg secret key name"
, "--column", "keyid"
, "--print-column", "ALL"
, "--separator", "\BEL"
, "--width", "500"
] ++ concatMap (\(Name n, KeyId kid) -> [BU8.toString n, T.unpack kid]) l
(ret, ok) <- waitZenity h
if ok
then do
let (_n, _:kid) = break (== '\BEL') ret
return $ Just (KeyId (T.pack kid))
else return Nothing
myWithProgress :: Title -> Desc -> ((Percent -> IO ()) -> IO a) -> IO a
myWithProgress title desc a = bracket setup teardown (a . sendpercent)
where
setup = do
h <- runZenity
[ "--progress"
, "--title", title
, "--text", escape desc
, "--auto-close"
, "--auto-kill"
]
return h
sendpercent h p = sendZenity h (show p)
teardown h = do
_ <- waitZenity h
return ()
data ZenityHandle = ZenityHandle Handle Handle ProcessHandle
runZenity :: [String] -> IO ZenityHandle
runZenity ps = do
(Just hin, Just hout, Nothing, ph) <- createProcess
(proc "zenity" ps)
{ std_out = CreatePipe
, std_in = CreatePipe
}
return $ ZenityHandle hin hout ph
sendZenity :: ZenityHandle -> String -> IO ()
sendZenity (ZenityHandle hin _ _) s = do
hPutStrLn hin s
hFlush hin
waitZenity :: ZenityHandle -> IO (String, Bool)
waitZenity (ZenityHandle hin hout ph) = do
hClose hin
ret <- hGetContents hout
exit <- waitForProcess ph
return (takeWhile (/= '\n') ret, exit == ExitSuccess)
-- Zenity parses --text as html and will choke on invalid tags
-- and '&' used outside a html entity. We don't want to use html, so
-- escape these things.
escape :: String -> String
escape = concatMap esc
where
esc '&' = "&"
esc '<' = "<"
esc '>' = ">"
esc c = [c]
|
