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authorNikolay Yakimov <root@livid.pp.ru>2021-08-12 08:13:51 +0300
committerNikolay Yakimov <root@livid.pp.ru>2021-08-12 22:14:17 +0300
commit7f4e1a1af61ba06685ce8c59777774aed472cca1 (patch)
tree4f19f024662af8b4507655e2b4ee2b48824f8bb6 /src
parent898e5aa5fca6065a657592c59d9c517310869cd1 (diff)
downloadxmobar-7f4e1a1af61ba06685ce8c59777774aed472cca1.tar.gz
xmobar-7f4e1a1af61ba06685ce8c59777774aed472cca1.tar.bz2
Refactor Kbd plugin: avoid partials, fallback to group name
Diffstat (limited to 'src')
-rw-r--r--src/Xmobar/Plugins/Kbd.hs55
1 files changed, 28 insertions, 27 deletions
diff --git a/src/Xmobar/Plugins/Kbd.hs b/src/Xmobar/Plugins/Kbd.hs
index 436359a..2214628 100644
--- a/src/Xmobar/Plugins/Kbd.hs
+++ b/src/Xmobar/Plugins/Kbd.hs
@@ -14,9 +14,11 @@
module Xmobar.Plugins.Kbd(Kbd(..)) where
-import Data.List (isPrefixOf, findIndex)
-import Data.Maybe (fromJust)
+import Data.List (isPrefixOf)
+import Data.Maybe (fromMaybe)
+import Data.Char (toLower)
import Control.Monad (forever)
+import Control.Applicative ((<|>))
import Graphics.X11.Xlib
import Graphics.X11.Xlib.Extras
@@ -27,47 +29,46 @@ import Xmobar.System.Kbd
-- 'Bad' prefixes of layouts
noLaySymbols :: [String]
-noLaySymbols = ["group", "inet", "ctr", "pc", "ctrl", "terminate"]
+noLaySymbols = ["group", "inet", "ctr", "compose", "pc", "ctrl", "terminate"]
-- splits the layout string into the actual layouts
splitLayout :: String -> [String]
-splitLayout s = splitLayout' noLaySymbols $ split s '+'
-
-splitLayout' :: [String] -> [String] -> [String]
--- end of recursion, remove empty strings
-splitLayout' [] s = map (takeWhile (/= ':')) $ filter (not . null) s
--- remove current string if it has a 'bad' prefix
-splitLayout' bad s =
- splitLayout' (tail bad) [x | x <- s, not $ isPrefixOf (head bad) x]
+splitLayout s
+ = filter flt
+ . map (takeWhile (/= ':'))
+ $ split (=='+') s
+ where
+ flt "" = False
+ flt s' = not $ any (`isPrefixOf` s') noLaySymbols
-- split String at each Char
-split :: String -> Char -> [String]
-split [] _ = [""]
-split (c:cs) delim
- | c == delim = "" : rest
- | otherwise = (c : head rest) : tail rest
- where
- rest = split cs delim
+split :: (Char -> Bool) -> String -> [String]
+split p s = case break p s of
+ (pref, _:suf) -> pref : split p suf
+ (pref, "") -> [pref]
-- replaces input string if on search list (exact match) with corresponding
-- element on replacement list.
--
-- if not found, return string unchanged
searchReplaceLayout :: KbdOpts -> String -> String
-searchReplaceLayout opts s = let c = findIndex (\x -> fst x == s) opts in
- case c of
- Nothing -> s
- x -> let i = fromJust x in snd $ opts!!i
+searchReplaceLayout opts s = fromMaybe s $ lookup s opts
-- returns the active layout
getKbdLay :: Display -> KbdOpts -> IO String
getKbdLay dpy opts = do
- lay <- getLayoutStr dpy
- curLay <- getKbdLayout dpy
- return $ searchReplaceLayout opts $ splitLayout lay!!curLay
-
-
+ lay <- splitLayout <$> getLayoutStr dpy
+ grps <- map (map toLower . take 2) <$> getGrpNames dpy
+ curLay <- getKbdLayout dpy
+ return $ searchReplaceLayout opts
+ $ fromMaybe "??"
+ $ (lay !!? curLay) <|> (grps !!? curLay)
+
+(!!?) :: [a] -> Int -> Maybe a
+(!!?) [] _ = Nothing
+(!!?) (x : _) 0 = Just x
+(!!?) (_ : xs) i = xs !!? (i - 1)
newtype Kbd = Kbd [(String, String)]
deriving (Read, Show)