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------------------------------------------------------------------------------
--- |
--- Module      :  Config.hs
--- Copyright   :  (c) Spencer Janssen 2007
--- License     :  BSD3-style (see LICENSE)
---
--- Maintainer  :  dons@galois.com
--- Stability   :  stable
--- Portability :  portable
---
--- This module specifies configurable defaults for xmonad. If you change
--- values here, be sure to recompile and restart (mod-q) xmonad,
--- for the changes to take effect.
---
-------------------------------------------------------------------------
-
-module Config where
-
---
--- Useful imports
---
-import XMonad
-import Operations
-import qualified StackSet as W
-import Data.Ratio
-import Data.Bits ((.|.))
-import qualified Data.Map as M
-import System.Exit
-import Graphics.X11.Xlib
-
--- % Extension-provided imports
-
--- | The default number of workspaces (virtual screens) and their names.
--- By default we use numeric strings, but any string may be used as a
--- workspace name. The number of workspaces is determined by the length
--- of this list.
---
--- A tagging example:
---
--- > workspaces = ["web", "irc", "code" ] ++ map show [4..9]
---
-workspaces :: [WorkspaceId]
-workspaces = map show [1 .. 9 :: Int]
-
--- | modMask lets you specify which modkey you want to use. The default
--- is mod1Mask ("left alt").  You may also consider using mod3Mask
--- ("right alt"), which does not conflict with emacs keybindings. The
--- "windows key" is usually mod4Mask.
---
-modMask :: KeyMask
-modMask = mod1Mask
-
--- | The mask for the numlock key. Numlock status is "masked" from the
--- current modifier status, so the keybindings will work with numlock on or
--- off. You may need to change this on some systems.
---
--- You can find the numlock modifier by running "xmodmap" and looking for a
--- modifier with Num_Lock bound to it:
---
--- > $ xmodmap | grep Num
--- > mod2        Num_Lock (0x4d)
---
--- Set numlockMask = 0 if you don't have a numlock key, or want to treat
--- numlock status separately.
---
-numlockMask :: KeyMask
-numlockMask = mod2Mask
-
--- | Width of the window border in pixels.
---
-borderWidth :: Dimension
-borderWidth = 1
-
--- | Border colors for unfocused and focused windows, respectively.
---
-normalBorderColor, focusedBorderColor :: String
-normalBorderColor  = "#dddddd"
-focusedBorderColor = "#ff0000"
-
--- | Default offset of drawable screen boundaries from each physical
--- screen. Anything non-zero here will leave a gap of that many pixels
--- on the given edge, on the that screen. A useful gap at top of screen
--- for a menu bar (e.g. 15)
---
--- An example, to set a top gap on monitor 1, and a gap on the bottom of
--- monitor 2, you'd use a list of geometries like so:
---
--- > defaultGaps = [(18,0,0,0),(0,18,0,0)] -- 2 gaps on 2 monitors
---
--- Fields are: top, bottom, left, right.
---
-defaultGaps :: [(Int,Int,Int,Int)]
-defaultGaps = [(0,0,0,0)] -- 15 for default dzen font
-
-------------------------------------------------------------------------
--- Window rules
-
--- | Execute arbitrary actions and WindowSet manipulations when managing
--- a new window. You can use this to, for example, always float a
--- particular program, or have a client always appear on a particular
--- workspace.
---
--- To find the property name associated with a program, use
---  xprop | grep WM_CLASS
--- and click on the client you're interested in.
---
-manageHook :: Window -- ^ the new window to manage
-           -> String -- ^ window title
-           -> String -- ^ window resource name
-           -> String -- ^ window resource class
-           -> X (WindowSet -> WindowSet)
-
--- Always float various programs:
-manageHook w _ _ c | c `elem` floats = fmap (W.float w . snd) (floatLocation w)
- where floats = ["MPlayer", "Gimp"]
-
--- Desktop panels and dock apps should be ignored by xmonad:
-manageHook w _ n _ | n `elem` ignore = reveal w >> return (W.delete w)
- where ignore = ["gnome-panel", "desktop_window", "kicker", "kdesktop"]
-
--- Automatically send Firefox windows to the "web" workspace:
--- If a workspace named "web" doesn't exist, the window will appear on the
--- current workspace.
-manageHook _ _ "Gecko" _ = return $ W.shift "web"
-
--- The default rule: return the WindowSet unmodified.  You typically do not
--- want to modify this line.
-manageHook _ _ _ _ = return id
-
-------------------------------------------------------------------------
--- Extensible layouts
---
--- You can specify and transform your layouts by modifying these values.
--- If you change layout bindings be sure to use 'mod-shift-space' after
--- restarting (with 'mod-q') to reset your layout state to the new
--- defaults, as xmonad preserves your old layout settings by default.
---
-
--- | The list of possible layouts. Add your custom layouts to this list.
-layouts :: [Layout Window]
-layouts = [ Layout tiled
-          , Layout $ Mirror tiled
-          , Layout Full
-          -- Add extra layouts you want to use here:
-          -- % Extension-provided layouts
-          ]
-  where
-     -- default tiling algorithm partitions the screen into two panes
-     tiled   = Tall nmaster delta ratio
-
-     -- The default number of windows in the master pane
-     nmaster = 1
-
-     -- Default proportion of screen occupied by master pane
-     ratio   = 1%2
-
-     -- Percent of screen to increment by when resizing panes
-     delta   = 3%100
-
--- | The top level layout switcher. Most users will not need to modify this binding.
---
--- By default, we simply switch between the layouts listed in `layouts'
--- above, but you may program your own selection behaviour here. Layout
--- transformers, for example, would be hooked in here.
---
-layoutHook :: Layout Window
-layoutHook = Layout $ Select layouts
-
--- | Register with xmonad a list of layouts whose state we can preserve over restarts.
--- There is typically no need to modify this list, the defaults are fine.
---
-serialisedLayouts :: [Layout Window]
-serialisedLayouts = layoutHook : layouts
-
-------------------------------------------------------------------------
--- Logging
-
--- | Perform an arbitrary action on each internal state change or X event.
--- Examples include:
---      * do nothing
---      * log the state to stdout
---
--- See the 'DynamicLog' extension for examples.
---
-logHook :: X ()
-logHook = return ()
-
-------------------------------------------------------------------------
--- Key bindings:
-
--- | The preferred terminal program, which is used in a binding below and by
--- certain contrib modules.
-terminal :: String
-terminal = "xterm"
-
--- | The xmonad key bindings. Add, modify or remove key bindings here.
---
--- (The comment formatting character is used when generating the manpage)
---
-keys :: M.Map (KeyMask, KeySym) (X ())
-keys = M.fromList $
-    -- launching and killing programs
-    [ ((modMask .|. shiftMask, xK_Return), spawn terminal) -- %! Launch terminal
-    , ((modMask,               xK_p     ), spawn "exe=`dmenu_path | dmenu` && eval \"exec $exe\"") -- %! Launch dmenu
-    , ((modMask .|. shiftMask, xK_p     ), spawn "gmrun") -- %! Launch gmrun
-    , ((modMask .|. shiftMask, xK_c     ), kill) -- %! Close the focused window
-
-    , ((modMask,               xK_space ), sendMessage NextLayout) -- %! Rotate through the available layout algorithms
-    , ((modMask .|. shiftMask, xK_space ), setLayout layoutHook) -- %!  Reset the layouts on the current workspace to default
-
-    , ((modMask,               xK_n     ), refresh) -- %! Resize viewed windows to the correct size
-
-    -- move focus up or down the window stack
-    , ((modMask,               xK_Tab   ), windows W.focusDown) -- %! Move focus to the next window
-    , ((modMask,               xK_j     ), windows W.focusDown) -- %! Move focus to the next window
-    , ((modMask,               xK_k     ), windows W.focusUp  ) -- %! Move focus to the previous window
-    , ((modMask,               xK_m     ), windows W.focusMaster  ) -- %! Move focus to the master window
-
-    -- modifying the window order
-    , ((modMask,               xK_Return), windows W.swapMaster) -- %! Swap the focused window and the master window
-    , ((modMask .|. shiftMask, xK_j     ), windows W.swapDown  ) -- %! Swap the focused window with the next window
-    , ((modMask .|. shiftMask, xK_k     ), windows W.swapUp    ) -- %! Swap the focused window with the previous window
-
-    -- resizing the master/slave ratio
-    , ((modMask,               xK_h     ), sendMessage Shrink) -- %! Shrink the master area
-    , ((modMask,               xK_l     ), sendMessage Expand) -- %! Expand the master area
-
-    -- floating layer support
-    , ((modMask,               xK_t     ), withFocused $ windows . W.sink) -- %! Push window back into tiling
-
-    -- increase or decrease number of windows in the master area
-    , ((modMask              , xK_comma ), sendMessage (IncMasterN 1)) -- %! Increment the number of windows in the master area
-    , ((modMask              , xK_period), sendMessage (IncMasterN (-1))) -- %! Deincrement the number of windows in the master area
-
-    -- toggle the status bar gap
-    , ((modMask              , xK_b     ), modifyGap (\i n -> let x = (defaultGaps ++ repeat (0,0,0,0)) !! i in if n == x then (0,0,0,0) else x)) -- %! Toggle the status bar gap
-
-    -- quit, or restart
-    , ((modMask .|. shiftMask, xK_q     ), io (exitWith ExitSuccess)) -- %! Quit xmonad
-    , ((modMask              , xK_q     ), broadcastMessage ReleaseResources >> restart Nothing True) -- %! Restart xmonad
-
-    -- % Extension-provided key bindings
-    ]
-    ++
-    -- mod-[1..9] %! Switch to workspace N
-    -- mod-shift-[1..9] %! Move client to workspace N
-    [((m .|. modMask, k), windows $ f i)
-        | (i, k) <- zip workspaces [xK_1 .. xK_9]
-        , (f, m) <- [(W.greedyView, 0), (W.shift, shiftMask)]]
-    ++
-    -- mod-{w,e,r} %! Switch to physical/Xinerama screens 1, 2, or 3
-    -- mod-shift-{w,e,r} %! Move client to screen 1, 2, or 3
-    [((m .|. modMask, key), screenWorkspace sc >>= flip whenJust (windows . f))
-        | (key, sc) <- zip [xK_w, xK_e, xK_r] [0..]
-        , (f, m) <- [(W.view, 0), (W.shift, shiftMask)]]
-
-    -- % Extension-provided key bindings lists
-
--- | Mouse bindings: default actions bound to mouse events
---
-mouseBindings :: M.Map (KeyMask, Button) (Window -> X ())
-mouseBindings = M.fromList $
-    -- mod-button1 %! Set the window to floating mode and move by dragging
-    [ ((modMask, button1), (\w -> focus w >> mouseMoveWindow w))
-    -- mod-button2 %! Raise the window to the top of the stack
-    , ((modMask, button2), (\w -> focus w >> windows W.swapMaster))
-    -- mod-button3 %! Set the window to floating mode and resize by dragging
-    , ((modMask, button3), (\w -> focus w >> mouseResizeWindow w))
-    -- you may also bind events to the mouse scroll wheel (button4 and button5)
-
-    -- % Extension-provided mouse bindings
-    ]
-
--- % Extension-provided definitions