hsfm/src/HSFM/GUI/Gtk/Callbacks/Utils.hs
2016-05-09 00:52:22 +02:00

101 lines
3.1 KiB
Haskell

{--
HSFM, a filemanager written in Haskell.
Copyright (C) 2016 Julian Ospald
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
version 2 as published by the Free Software Foundation.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
--}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# OPTIONS_HADDOCK ignore-exports #-}
module HSFM.GUI.Gtk.Callbacks.Utils where
import Control.Monad
(
forM_
)
import GHC.IO.Exception
(
IOErrorType(..)
)
import qualified HPath as P
import HSFM.FileSystem.Errors
import HSFM.FileSystem.FileOperations
import HSFM.FileSystem.FileType
import HSFM.FileSystem.UtilTypes
import HSFM.GUI.Gtk.Data
import HSFM.GUI.Gtk.Dialogs
import HSFM.GUI.Gtk.MyView
import HSFM.GUI.Gtk.Utils
import HSFM.Utils.IO
(
modifyTVarIO
)
import Prelude hiding(readFile)
-- |Carries out a file operation with the appropriate error handling
-- allowing the user to react to various exceptions with further input.
doFileOperation :: FileOperation -> IO ()
doFileOperation (FCopy (Copy (f':fs') to)) =
_doFileOperation (f':fs') to easyCopyOverwrite easyCopy
$ doFileOperation (FCopy $ Copy fs' to)
doFileOperation (FMove (Move (f':fs') to)) =
_doFileOperation (f':fs') to moveFileOverwrite moveFile
$ doFileOperation (FMove $ Move fs' to)
doFileOperation _ = return ()
_doFileOperation :: [P.Path b1]
-> P.Path P.Abs
-> (P.Path b1 -> P.Path P.Abs -> IO b)
-> (P.Path b1 -> P.Path P.Abs -> IO a)
-> IO ()
-> IO ()
_doFileOperation [] _ _ _ _ = return ()
_doFileOperation (f:fs) to mcOverwrite mc rest = do
toname <- P.basename f
let topath = to P.</> toname
reactOnError (mc f topath >> rest)
[(AlreadyExists , collisionAction fileCollisionDialog topath)]
[(FileDoesExist{}, collisionAction fileCollisionDialog topath)
,(DirDoesExist{} , collisionAction fileCollisionDialog topath)
,(SameFile{} , collisionAction renameDialog topath)]
where
collisionAction diag topath = do
mcm <- diag . P.fromAbs $ topath
forM_ mcm $ \cm -> case cm of
Overwrite -> mcOverwrite f topath >> rest
OverwriteAll -> forM_ (f:fs) $ \x -> do
toname' <- P.basename x
mcOverwrite x (to P.</> toname')
Skip -> rest
Rename newn -> mc f (to P.</> newn) >> rest
_ -> return ()
-- |Helper that is invoked for any directory change operations.
goDir :: MyGUI -> MyView -> Item -> IO ()
goDir mygui myview item = do
cdir <- getCurrentDir myview
modifyTVarIO (history myview)
(\(p, _) -> (path cdir `addHistory` p, []))
refreshView' mygui myview item