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|
-----------------------------------------------------------------------------
-- |
-- Module : XMonadContrib.DynamicLog
-- Copyright : (c) Don Stewart <dons@cse.unsw.edu.au>
-- License : BSD3-style (see LICENSE)
--
-- Maintainer : Don Stewart <dons@cse.unsw.edu.au>
-- Stability : unstable
-- Portability : unportable
--
-- DynamicLog
--
-- Log events in:
--
-- > 1 2 [3] 4 8
--
-- format. Suitable to pipe into dzen.
--
-----------------------------------------------------------------------------
module XMonadContrib.DynamicLog (
-- * Usage
-- $usage
dynamicLog,
dynamicLogWithPP,
dynamicLogXinerama,
pprWindowSet,
pprWindowSetXinerama,
PP(..), defaultPP, sjanssenPP,
wrap, xmobarColor
) where
--
-- Useful imports
--
import XMonad
import {-# SOURCE #-} Config (workspaces)
import Operations () -- for ReadableSomeLayout instance
import Data.Maybe ( isJust )
import Data.List
import Data.Ord ( comparing )
import qualified StackSet as S
import Data.Monoid
import XMonadContrib.NamedWindows
-- $usage
--
-- To use, set:
--
-- > import XMonadContrib.DynamicLog
-- > logHook = dynamicLog
-- %import XMonadContrib.DynamicLog
-- %def -- comment out default logHook definition above if you uncomment any of these:
-- %def logHook = dynamicLog
-- |
-- An example log hook, print a status bar output to stdout, in the form:
--
-- > 1 2 [3] 4 7 : full : title
--
-- That is, the currently populated workspaces, the current
-- workspace layout, and the title of the focused window.
--
dynamicLog :: X ()
dynamicLog = dynamicLogWithPP defaultPP
-- |
-- A log function that uses the 'PP' hooks to customize output.
dynamicLogWithPP :: PP -> X ()
dynamicLogWithPP pp = do
-- layout description
ld <- withWindowSet $ return . description . S.layout . S.workspace . S.current
-- workspace list
ws <- withWindowSet $ return . pprWindowSet pp
-- window title
wt <- withWindowSet $ maybe (return "") (fmap show . getName) . S.peek
io . putStrLn . sepBy (ppSep pp) . ppOrder pp $
[ ws
, ppLayout pp ld
, ppTitle pp wt
]
pprWindowSet :: PP -> WindowSet -> String
pprWindowSet pp s = unwords' $ map fmt $ sortBy cmp
(map S.workspace (S.current s : S.visible s) ++ S.hidden s)
where f Nothing Nothing = EQ
f (Just _) Nothing = LT
f Nothing (Just _) = GT
f (Just x) (Just y) = compare x y
wsIndex = flip elemIndex workspaces . S.tag
cmp a b = f (wsIndex a) (wsIndex b) `mappend` compare (S.tag a) (S.tag b)
this = S.tag (S.workspace (S.current s))
visibles = map (S.tag . S.workspace) (S.visible s)
fmt w = printer pp (S.tag w)
where printer | S.tag w == this = ppCurrent
| S.tag w `elem` visibles = ppVisible
| isJust (S.stack w) = ppHidden
| otherwise = ppHiddenNoWindows
-- |
-- Workspace logger with a format designed for Xinerama:
--
-- > [1 9 3] 2 7
--
-- where 1, 9, and 3 are the workspaces on screens 1, 2 and 3, respectively,
-- and 2 and 7 are non-visible, non-empty workspaces
--
dynamicLogXinerama :: X ()
dynamicLogXinerama = withWindowSet $ io . putStrLn . pprWindowSetXinerama
pprWindowSetXinerama :: WindowSet -> String
pprWindowSetXinerama ws = "[" ++ unwords onscreen ++ "] " ++ unwords offscreen
where onscreen = map (S.tag . S.workspace)
. sortBy (comparing S.screen) $ S.current ws : S.visible ws
offscreen = map S.tag . filter (isJust . S.stack)
. sortBy (comparing S.tag) $ S.hidden ws
wrap :: String -> String -> String -> String
wrap l r "" = ""
wrap l r m = l ++ m ++ r
-- | Intersperse spaces, filtering empty words.
unwords' :: [String] -> String
unwords' = sepBy " "
sepBy :: String -> [String] -> String
sepBy sep = concat . intersperse sep . filter (not . null)
-- TODO dzenColor
xmobarColor :: String -> String -> String -> String
xmobarColor fg bg = wrap t "</fc>"
where t = concat ["<fc=", fg, if null bg then "" else "," ++ bg, ">"]
-- | The 'PP' type allows the user to customize various behaviors of
-- dynamicLogPP
data PP = PP { ppCurrent, ppVisible
, ppHidden, ppHiddenNoWindows :: WorkspaceId -> String
, ppSep :: String
, ppTitle :: String -> String
, ppLayout :: String -> String
, ppOrder :: [String] -> [String] }
-- | The default pretty printing options, as seen in dynamicLog
defaultPP :: PP
defaultPP = PP { ppCurrent = wrap "[" "]"
, ppVisible = wrap "<" ">"
, ppHidden = id
, ppHiddenNoWindows = const ""
, ppSep = " : "
, ppTitle = const ""
, ppLayout = id
, ppOrder = id }
-- | The options that sjanssen likes to use, as an example. Note the use of
-- 'xmobarColor' and the record update on defaultPP
sjanssenPP :: PP
sjanssenPP = defaultPP { ppCurrent = xmobarColor "white" "#ff000000"
, ppTitle = xmobarColor "#00ee00" ""
, ppOrder = reverse
}
|
