module Config where

-- xmonad places each window into a "workspace." Each workspace can have any
-- number of windows, which you can cycle though with mod-j and mod-k. Windows are
-- either displayed full screen, or tiled. You can toggle the layout mode with
-- mod-space.
--
-- You can switch to workspace N with mod-N. For example, to switch to workspace
-- 5, you would press mod-5. Similarly, you can move the current window to another
-- workspace with mod-shift-N.
--
-- When running with multiple monitors (Xinerama), each screen has exactly 1
-- workspace visible. When xmonad starts, workspace 1 is on screen 1, workspace 2
-- is on screen 2, etc. If you switch to a workspace which is currently visible on
-- another screen, xmonad simply switches focus to that screen. If you switch to a
-- workspace which is *not* visible, xmonad replaces the workspace on the
-- *current* screen with the workspace you selected.
--
-- For example, if you have the following configuration:
--
-- Screen 1: Workspace 2
-- Screen 2: Workspace 5 (current workspace)
--
-- and you wanted to view workspace 7 on screen 1, you would press:
--
-- mod-2 (to select workspace 2, and make screen 1 the current screen)
-- mod-7 (to select workspace 7)
--
-- Since switching to the workspace currently visible on a given screen is such a
-- common operation, shortcuts are provided: mod-{w,e,r} switch to the workspace
-- currently visible on screens 1, 2, and 3 respectively. Likewise,
-- shift-mod-{w,e,r} moves the current window to the workspace on that screen.
-- Using these keys, the above example would become mod-w mod-7.

import Data.Ratio
import Data.Bits
import qualified Data.Map as M
import System.Exit
import Graphics.X11.Xlib
import XMonad
import Operations

-- The number of workspaces:
workspaces :: Int
workspaces = 9

-- modMask lets you easily change which modkey you use. The default is mod1Mask.
-- ("alt")
modMask :: KeyMask
modMask = mod1Mask

-- The default size for the left pane.
defaultLeftWidth :: Rational
defaultLeftWidth = 1%2

-- How much to change the size of the windows on the left by default.
defaultDelta :: Rational
defaultDelta = 3%100

-- The mask for the numlock key. You may need to change this on some systems.
numlockMask :: KeySym
numlockMask = lockMask

-- The keys list.
keys :: M.Map (KeyMask, KeySym) (X ())
keys = M.fromList $
    [ ((modMask .|. shiftMask, xK_Return), spawn "xterm")
    , ((modMask,               xK_p     ), spawn "exe=`emenu_path | dmenu` && exec $exe")
    , ((controlMask,           xK_space ), spawn "gmrun")
    , ((modMask,               xK_Tab   ), raise GT)
    , ((modMask,               xK_j     ), raise GT)
    , ((modMask,               xK_k     ), raise LT)
    , ((modMask,               xK_h     ), changeWidth (negate defaultDelta))
    , ((modMask,               xK_l     ), changeWidth defaultDelta)
    , ((modMask .|. shiftMask, xK_c     ), kill)
    , ((modMask .|. shiftMask, xK_q     ), io $ exitWith ExitSuccess)
    , ((modMask .|. shiftMask, xK_F12   ), io restart)
    , ((modMask,               xK_space ), switchLayout)
    , ((modMask,               xK_Return), promote)
    ] ++
    -- Keybindings to each workspace:
    [((m .|. modMask, xK_0 + fromIntegral i), f i)
        | i <- [1 .. workspaces]
        , (f, m) <- [(view, 0), (tag, shiftMask)]]
    -- Keybindings to each screen:
    ++
    [((m .|. modMask, key), screenWS sc >>= f)
        | (key, sc) <- zip [xK_w, xK_e, xK_r] [1..]
        , (f, m) <- [(view, 0), (tag, shiftMask)]]