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{-# OPTIONS -fno-warn-missing-signatures -fno-warn-orphans #-}
{-# LANGUAGE TypeFamilies #-}
-----------------------------------------------------------------------------
-- |
-- Module      :  MetaTile.Config
-- Copyright   :  (c) Spencer Janssen 2007
-- License     :  BSD3-style (see LICENSE)
--
-- Maintainer  :  dons@galois.com
-- Stability   :  stable
-- Portability :  portable
--
-- This module specifies the default configuration values for xmonad.
--
-- DO NOT MODIFY THIS FILE!  It won't work.  You may configure xmonad
-- by providing your own @~\/.metatile\/metatile.hs@ that overrides
-- specific fields in the default config, 'def'.  For a starting point, you can
-- copy the @metatile.hs@ found in the @man@ directory, or look at
-- examples on the xmonad wiki.
--
------------------------------------------------------------------------

module MetaTile.Config (Default(..)) where

--
-- Useful imports
--
import MetaTile.Core as MetaTile hiding
    (workspaces,manageHook,keys,logHook,startupHook,mouseBindings
    ,layoutHook,modMask,terminal,normalBorderColor,focusedBorderColor,defaultBorderWidth,focusFollowsMouse
    ,handleEventHook,clickJustFocuses,rootMask,frameMask,clientMask)
import qualified MetaTile.Core as MetaTile
    (workspaces,manageHook,keys,logHook,startupHook,mouseBindings
    ,layoutHook,modMask,terminal,normalBorderColor,focusedBorderColor,defaultBorderWidth,focusFollowsMouse
    ,handleEventHook,clickJustFocuses,rootMask,frameMask,clientMask)

import Prelude hiding (Floating)
import MetaTile.Layout
import MetaTile.Layout.Floating
import MetaTile.Layout.LayoutModifier
import MetaTile.Operations
import qualified MetaTile.StackSet as W
import Data.Bits ((.|.))
import Data.Default
import Data.Monoid
import qualified Data.Map as M
import System.Exit
import Graphics.X11.Xlib
import Graphics.X11.Xlib.Extras

-- | 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.
--
defaultModMask :: KeyMask
defaultModMask = mod1Mask

-- | Border colors for unfocused and focused windows, respectively.
--
normalBorderColor, focusedBorderColor :: String
normalBorderColor  = "gray" -- "#dddddd"
focusedBorderColor = "red"  -- "#ff0000" don't use hex, not <24 bit safe

defaultBorderWidth :: BorderWidth
defaultBorderWidth = BorderWidth 1 1 1 1

------------------------------------------------------------------------
-- 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 :: ManageHook
manageHook = mempty

------------------------------------------------------------------------
-- 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 ()

------------------------------------------------------------------------
-- Event handling

-- | Defines a custom handler function for X Events. The function should
-- return (All True) if the default handler is to be run afterwards.
-- To combine event hooks, use mappend or mconcat from Data.Monoid.
handleEventHook :: Event -> X All
handleEventHook _ = return (All True)

-- | Perform an arbitrary action at xmonad startup.
startupHook :: X ()
startupHook = return ()

------------------------------------------------------------------------
-- 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 available layouts.  Note that each layout is separated by |||, which
-- denotes layout choice.
layout = floating $ tiled ||| Mirror tiled ||| Full
  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

------------------------------------------------------------------------
-- Event Masks:

-- | The client events that xmonad is interested in
clientMask :: EventMask
clientMask = structureNotifyMask .|. enterWindowMask .|. propertyChangeMask

-- | The frame events that xmonad is interested in
frameMask :: EventMask
frameMask =  substructureRedirectMask .|. substructureNotifyMask

-- | The root events that xmonad is interested in
rootMask :: EventMask
rootMask =  substructureRedirectMask .|. substructureNotifyMask
        .|. enterWindowMask .|. leaveWindowMask .|. structureNotifyMask
        .|. buttonPressMask

------------------------------------------------------------------------
-- Key bindings:

-- | The preferred terminal program, which is used in a binding below and by
-- certain contrib modules.
terminal :: String
terminal = "xterm"

-- | Whether focus follows the mouse pointer.
focusFollowsMouse :: Bool
focusFollowsMouse = True

-- | Whether a mouse click select the focus or is just passed to the window
clickJustFocuses :: Bool
clickJustFocuses = True


-- | The xmonad key bindings. Add, modify or remove key bindings here.
--
-- (The comment formatting character is used when generating the manpage)
--
keys :: XConfig Layout -> M.Map (KeyMask, KeySym) (X ())
keys conf@(XConfig {MetaTile.modMask = modMask}) = M.fromList $
    -- launching and killing programs
    [ ((modMask .|. shiftMask, xK_Return), spawn $ MetaTile.terminal conf) -- %! Launch terminal
    , ((modMask,               xK_p     ), spawn "dmenu_run") -- %! 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 $ MetaTile.layoutHook conf) -- %!  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 .|. shiftMask, xK_Tab   ), windows W.focusUp  ) -- %! Move focus to the previous 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 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

    -- quit, or restart
    , ((modMask .|. shiftMask, xK_q     ), io (exitWith ExitSuccess)) -- %! Quit metatile
    , ((modMask              , xK_q     ), spawn "if type metatile; then metatile --recompile && metatile --restart; else xmessage metatile not in \\$PATH: \"$PATH\"; fi") -- %! Restart metatile

    , ((modMask .|. shiftMask, xK_slash ), spawn ("echo \"" ++ help ++ "\" | xmessage -file -")) -- %! Run xmessage with a summary of the default keybindings (useful for beginners)
    -- repeat the binding for non-American layout keyboards
    , ((modMask              , xK_question), spawn ("echo \"" ++ help ++ "\" | xmessage -file -"))
    ]
    ++
    -- 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 (MetaTile.workspaces conf) [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)]]

-- | Mouse bindings: default actions bound to mouse events
mouseBindings :: XConfig Layout -> M.Map (KeyMask, Button) (Window -> X ())
mouseBindings (XConfig {MetaTile.modMask = modMask}) = 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), windows . (W.shiftMaster .) . W.focusWindow)
    -- 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)
    ]

instance (a ~ ModifiedLayout Floating (Choose Tall (Choose (Mirror Tall) Full))) => Default (XConfig a) where
  def = XConfig
    { MetaTile.workspaces         = workspaces
    , MetaTile.layoutHook         = layout
    , MetaTile.terminal           = terminal
    , MetaTile.normalBorderColor  = normalBorderColor
    , MetaTile.focusedBorderColor = focusedBorderColor
    , MetaTile.defaultBorderWidth = defaultBorderWidth
    , MetaTile.modMask            = defaultModMask
    , MetaTile.keys               = keys
    , MetaTile.logHook            = logHook
    , MetaTile.startupHook        = startupHook
    , MetaTile.mouseBindings      = mouseBindings
    , MetaTile.manageHook         = manageHook
    , MetaTile.handleEventHook    = handleEventHook
    , MetaTile.focusFollowsMouse  = focusFollowsMouse
    , MetaTile.clickJustFocuses   = clickJustFocuses
    , MetaTile.clientMask         = clientMask
    , MetaTile.frameMask          = frameMask
    , MetaTile.rootMask           = rootMask
    }

-- | Finally, a copy of the default bindings in simple textual tabular format.
help :: String
help = unlines ["The default modifier key is 'alt'. Default keybindings:",
    "",
    "-- launching and killing programs",
    "mod-Shift-Enter  Launch xterminal",
    "mod-p            Launch dmenu",
    "mod-Shift-p      Launch gmrun",
    "mod-Shift-c      Close/kill the focused window",
    "mod-Space        Rotate through the available layout algorithms",
    "mod-Shift-Space  Reset the layouts on the current workSpace to default",
    "mod-n            Resize/refresh viewed windows to the correct size",
    "",
    "-- move focus up or down the window stack",
    "mod-Tab        Move focus to the next window",
    "mod-Shift-Tab  Move focus to the previous window",
    "mod-j          Move focus to the next window",
    "mod-k          Move focus to the previous window",
    "mod-m          Move focus to the master window",
    "",
    "-- modifying the window order",
    "mod-Return   Swap the focused window and the master window",
    "mod-Shift-j  Swap the focused window with the next window",
    "mod-Shift-k  Swap the focused window with the previous window",
    "",
    "-- resizing the master/slave ratio",
    "mod-h  Shrink the master area",
    "mod-l  Expand the master area",
    "",
    "-- floating layer support",
    "mod-t  Push window back into tiling; unfloat and re-tile it",
    "",
    "-- increase or decrease number of windows in the master area",
    "mod-comma  (mod-,)   Increment the number of windows in the master area",
    "mod-period (mod-.)   Deincrement the number of windows in the master area",
    "",
    "-- quit, or restart",
    "mod-Shift-q  Quit metatile",
    "mod-q        Restart metatile",
    "mod-[1..9]   Switch to workSpace N",
    "",
    "-- Workspaces & screens",
    "mod-Shift-[1..9]   Move client to workspace N",
    "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",
    "",
    "-- Mouse bindings: default actions bound to mouse events",
    "mod-button1  Set the window to floating mode and move by dragging",
    "mod-button2  Raise the window to the top of the stack",
    "mod-button3  Set the window to floating mode and resize by dragging"]