1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
|
{-# LANGUAGE DeriveDataTypeable #-}
-----------------------------------------------------------------------------
-- |
-- Module : XMonad.Hooks.ScreenCorners
-- Copyright : (c) 2009 Nils Schweinsberg
-- License : BSD3-style (see LICENSE)
--
-- Maintainer : Nils Schweinsberg <mail@n-sch.de>
-- Stability : unstable
-- Portability : unportable
--
-- Run @X ()@ actions by touching the edge of your screen with your mouse.
--
-----------------------------------------------------------------------------
module XMonad.Hooks.ScreenCorners
(
-- * Usage
-- $usage
-- * Adding screen corners
ScreenCorner (..)
, addScreenCorner
, addScreenCorners
-- * Event hook
, screenCornerEventHook
) where
import Data.Monoid
import Data.List (find)
import XMonad
import XMonad.Util.XUtils (fi)
import qualified Data.Map as M
import qualified XMonad.Util.ExtensibleState as XS
data ScreenCorner = SCUpperLeft
| SCUpperRight
| SCLowerLeft
| SCLowerRight
deriving (Eq, Ord, Show)
--------------------------------------------------------------------------------
-- ExtensibleState modifications
--------------------------------------------------------------------------------
newtype ScreenCornerState = ScreenCornerState (M.Map Window (ScreenCorner, X ()))
deriving Typeable
instance ExtensionClass ScreenCornerState where
initialValue = ScreenCornerState M.empty
-- | Add one single @X ()@ action to a screen corner
addScreenCorner :: ScreenCorner -> X () -> X ()
addScreenCorner corner xF = do
ScreenCornerState m <- XS.get
(win,xFunc) <- case find (\(_,(sc,_)) -> sc == corner) (M.toList m) of
Just (w, (_,xF')) -> return (w, xF' >> xF) -- chain X actions
Nothing -> flip (,) xF `fmap` createWindowAt corner
XS.modify $ \(ScreenCornerState m') -> ScreenCornerState $ M.insert win (corner,xFunc) m'
-- | Add a list of @(ScreenCorner, X ())@ tuples
addScreenCorners :: [ (ScreenCorner, X ()) ] -> X ()
addScreenCorners = mapM_ (\(corner, xF) -> addScreenCorner corner xF)
--------------------------------------------------------------------------------
-- Xlib functions
--------------------------------------------------------------------------------
-- "Translate" a ScreenCorner to real (x,y) Positions
createWindowAt :: ScreenCorner -> X Window
createWindowAt SCUpperLeft = createWindowAt' 0 0
createWindowAt SCUpperRight = withDisplay $ \dpy ->
let w = displayWidth dpy (defaultScreen dpy) - 1
in createWindowAt' (fi w) 0
createWindowAt SCLowerLeft = withDisplay $ \dpy ->
let h = displayHeight dpy (defaultScreen dpy) - 1
in createWindowAt' 0 (fi h)
createWindowAt SCLowerRight = withDisplay $ \dpy ->
let w = displayWidth dpy (defaultScreen dpy) - 1
h = displayHeight dpy (defaultScreen dpy) - 1
in createWindowAt' (fi w) (fi h)
-- Create a new X window at a (x,y) Position
createWindowAt' :: Position -> Position -> X Window
createWindowAt' x y = withDisplay $ \dpy -> io $ do
rootw <- rootWindow dpy (defaultScreen dpy)
let
visual = defaultVisualOfScreen $ defaultScreenOfDisplay dpy
attrmask = cWOverrideRedirect
w <- allocaSetWindowAttributes $ \attributes -> do
set_override_redirect attributes True
createWindow dpy -- display
rootw -- parent window
x -- x
y -- y
1 -- width
1 -- height
0 -- border width
0 -- depth
inputOnly -- class
visual -- visual
attrmask -- valuemask
attributes -- attributes
-- we only need mouse entry events
selectInput dpy w enterWindowMask
mapWindow dpy w
sync dpy False
return w
--------------------------------------------------------------------------------
-- Event hook
--------------------------------------------------------------------------------
-- | Handle screen corner events
screenCornerEventHook :: Event -> X All
screenCornerEventHook CrossingEvent { ev_window = win } = do
ScreenCornerState m <- XS.get
case M.lookup win m of
Just (_, xF) -> xF
Nothing -> return ()
return (All True)
screenCornerEventHook _ = return (All True)
--------------------------------------------------------------------------------
-- $usage
--
-- This extension adds KDE-like screen corners to XMonad. By moving your cursor
-- into one of your screen corners you can trigger an @X ()@ action, for
-- example @"XMonad.Actions.GridSelect".goToSelected@ or
-- @"XMonad.Actions.CycleWS".nextWS@ etc.
--
-- To use it, import it on top of your @xmonad.hs@:
--
-- > import XMonad.Hooks.ScreenCorners
--
-- Then add your screen corners in our startup hook:
--
-- > myStartupHook = do
-- > ...
-- > addScreenCorner SCUpperRight (goToSelected defaultGSConfig { gs_cellwidth = 200})
-- > addScreenCorners [ (SCLowerRight, nextWS)
-- > , (SCLowerLeft, prevWS)
-- > ]
--
-- And finally wait for screen corner events in your event hook:
--
-- > myEventHook e = do
-- > ...
-- > screenCornerEventHook e
|
