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|
-----------------------------------------------------------------------------
-- |
-- Module : XMonad.Actions.Plane
-- Copyright : (c) Marco Túlio Gontijo e Silva <marcot@riseup.net>,
-- Leonardo Serra <leoserra@minaslivre.org>
-- License : BSD3-style (see LICENSE)
--
-- Maintainer : Marco Túlio Gontijo e Silva <marcot@riseup.net>
-- Stability : unstable
-- Portability : unportable
--
-- This module has functions to navigate through workspaces in a bidimensional
-- manner. It allows the organization of workspaces in lines, and provides
-- functions to move and shift windows in all four directions (left, up, right
-- and down) possible in a surface.
--
-- This functionality was inspired by GNOME (finite) and KDE (infinite)
-- keybindings for workspace navigation, and by "XMonad.Actions.CycleWS" for
-- the idea of applying this approach to XMonad.
-----------------------------------------------------------------------------
module XMonad.Actions.Plane
(
-- * Usage
-- $usage
-- * Data types
Direction (..)
, Limits (..)
, Lines (..)
-- * Key bindings
, planeKeys
-- * Navigating through workspaces
, planeShift
, planeMove
)
where
import Control.Monad
import Data.List
import Data.Map hiding (split)
import Data.Maybe
import XMonad
import XMonad.StackSet hiding (workspaces)
import XMonad.Util.Run
-- $usage
-- You can use this module with the following in your @~\/.xmonad\/xmonad.hs@ file:
--
-- > import XMonad.Actions.Plane
-- >
-- > main = xmonad defaultConfig {keys = myKeys}
-- >
-- > myKeys conf = union (keys defaultConfig conf) $ myNewKeys conf
-- >
-- > myNewkeys (XConfig {modMask = modm}) = planeKeys modm (Lines 3) Finite
--
-- For detailed instructions on editing your key bindings, see
-- "XMonad.Doc.Extending#Editing_key_bindings".
-- | Direction to go in the plane.
data Direction = ToLeft | ToUp | ToRight | ToDown deriving Enum
-- | Defines the behaviour when you're trying to move out of the limits.
data Limits
= Finite -- ^ Ignore the function call, and keep in the same workspace.
| Circular -- ^ Get on the other side, like in the Snake game.
| Linear -- ^ The plan comes as a row, so it goes to the next or prev if
-- the workspaces were numbered.
deriving Eq
-- | The number of lines in which the workspaces will be arranged. It's
-- possible to use a number of lines that is not a divisor of the number of
-- workspaces, but the results are better when using a divisor. If it's not a
-- divisor, the last line will have the remaining workspaces.
data Lines
= GConf -- ^ Use @gconftool-2@ to find out the number of lines.
| Lines Int -- ^ Specify the number of lines explicitly.
-- | This is the way most people would like to use this module. It attaches the
-- 'KeyMask' passed as a parameter with 'xK_Left', 'xK_Up', 'xK_Right' and
-- 'xK_Down', associating it with 'planeMove' to the corresponding 'Direction'.
-- It also associates these bindings with 'shiftMask' to 'planeShift'.
planeKeys :: KeyMask -> Lines -> Limits -> Map (KeyMask, KeySym) (X ())
planeKeys modm ln limits =
fromList $
[ ((keyMask, keySym), function ln limits direction)
| (keySym, direction) <- zip [xK_Left .. xK_Down] $ enumFrom ToLeft
, (keyMask, function) <- [(modm, planeMove), (shiftMask .|. modm, planeShift)]
]
-- | Shift a window to the next workspace in 'Direction'. Note that this will
-- also move to the next workspace. It's a good idea to use the same 'Lines'
-- and 'Limits' for all the bindings.
planeShift :: Lines -> Limits -> Direction -> X ()
planeShift = plane shift'
shift' ::
(Eq s, Eq i, Ord a) => i -> StackSet i l a s sd -> StackSet i l a s sd
shift' area = greedyView area . shift area
-- | Move to the next workspace in 'Direction'.
planeMove :: Lines -> Limits -> Direction -> X ()
planeMove = plane greedyView
plane ::
(WorkspaceId -> WindowSet -> WindowSet) -> Lines -> Limits -> Direction ->
X ()
plane function numberLines_ limits direction = do
state <- get
xconf <- ask
numberLines <-
liftIO $
case numberLines_ of
Lines numberLines__ ->
return numberLines__
GConf ->
do
numberLines__ <-
runProcessWithInput gconftool parameters ""
case reads numberLines__ of
[(numberRead, _)] -> return numberRead
_ ->
do
trace $
"XMonad.Actions.Plane: Could not parse the output of " ++ gconftool ++
unwords parameters ++ ": " ++ numberLines__ ++ "; assuming 1."
return 1
let
notBorder :: Bool
notBorder = (replicate 2 (circular_ < currentWS) ++ replicate 2 (circular_ > currentWS)) !! fromEnum direction
circular_ :: Int
circular_ = circular currentWS
circular :: Int -> Int
circular =
[ onLine pred
, onColumn pred
, onLine succ
, onColumn succ
]
!! fromEnum direction
linear :: Int -> Int
linear =
[ onLine pred . onColumn pred
, onColumn pred . onLine pred
, onLine succ . onColumn succ
, onColumn succ . onLine succ
]
!! fromEnum direction
onLine :: (Int -> Int) -> Int -> Int
onLine f currentWS_
| line < areasLine = mod_ columns
| otherwise = mod_ areasColumn
where
line, column :: Int
(line, column) = split currentWS_
mod_ :: Int -> Int
mod_ columns_ = compose line $ mod (f column) columns_
onColumn :: (Int -> Int) -> Int -> Int
onColumn f currentWS_
| column < areasColumn || areasColumn == 0 = mod_ numberLines
| otherwise = mod_ $ pred numberLines
where
line, column :: Int
(line, column) = split currentWS_
mod_ :: Int -> Int
mod_ lines_ = compose (mod (f line) lines_) column
compose :: Int -> Int -> Int
compose line column = line * columns + column
split :: Int -> (Int, Int)
split currentWS_ =
(operation div, operation mod)
where
operation :: (Int -> Int -> Int) -> Int
operation f = f currentWS_ columns
areasLine :: Int
areasLine = div areas columns
areasColumn :: Int
areasColumn = mod areas columns
columns :: Int
columns =
if mod areas numberLines == 0 then preColumns else preColumns + 1
currentWS :: Int
currentWS = fromJust mCurrentWS
preColumns :: Int
preColumns = div areas numberLines
mCurrentWS :: Maybe Int
mCurrentWS = elemIndex (currentTag $ windowset state) areaNames
areas :: Int
areas = length areaNames
run :: (Int -> Int) -> X ()
run f = windows $ function $ areaNames !! f currentWS
areaNames :: [String]
areaNames = workspaces $ config xconf
when (isJust mCurrentWS) $
case limits of
Finite -> when notBorder $ run circular
Circular -> run circular
Linear -> if notBorder then run circular else run linear
gconftool :: String
gconftool = "gconftool-2"
parameters :: [String]
parameters = ["--get", "/apps/panel/applets/workspace_switcher_screen0/prefs/num_rows"]
|
