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
|
----------------------------------------------------------------------------
-- |
-- Module : XMonad.Util.Font
-- Copyright : (c) 2007 Andrea Rossato and Spencer Janssen
-- License : BSD-style (see xmonad/LICENSE)
--
-- Maintainer : andrea.rossato@unibz.it
-- Stability : unstable
-- Portability : unportable
--
-- A module for abstracting a font facility over Core fonts and Xft
--
-----------------------------------------------------------------------------
module XMonad.Util.Font (
-- * Usage:
-- $usage
XMonadFont(..)
, initXMF
, releaseXMF
, initCoreFont
, releaseCoreFont
, Align (..)
, stringPosition
, textWidthXMF
, textExtentsXMF
, printStringXMF
, stringToPixel
) where
import XMonad
import Foreign
#ifdef XFT
import Data.List
import Graphics.X11.Xft
import Graphics.X11.Xrender
#endif
-- Hide the Core Font/Xft switching here
data XMonadFont = Core FontStruct
#ifdef XFT
| Xft XftFont
#endif
-- $usage
-- See "Xmonad.Layout.Tabbed" or "XMonad.Prompt" for usage examples
-- | Get the Pixel value for a named color: if an invalid name is
-- given the black pixel will be returned.
stringToPixel :: MonadIO m => Display -> String -> m Pixel
stringToPixel d s = liftIO $ catch getIt fallBack
where getIt = initColor d s
fallBack = const $ return $ blackPixel d (defaultScreen d)
-- | Given a fontname returns the font structure. If the font name is
-- not valid the default font will be loaded and returned.
initCoreFont :: String -> X FontStruct
initCoreFont s = do
d <- asks display
io $ catch (getIt d) (fallBack d)
where getIt d = loadQueryFont d s
fallBack d = const $ loadQueryFont d "-misc-fixed-*-*-*-*-10-*-*-*-*-*-*-*"
releaseCoreFont :: FontStruct -> X ()
releaseCoreFont fs = do
d <- asks display
io $ freeFont d fs
-- | When initXMF gets a font name that starts with 'xft:' it switchs to the Xft backend
-- Example: 'xft: Sans-10'
initXMF :: String -> X XMonadFont
initXMF s =
#ifdef XFT
if xftPrefix `isPrefixOf` s then
do
dpy <- asks display
xftdraw <- io $ xftFontOpen dpy (defaultScreenOfDisplay dpy) (drop (length xftPrefix) s)
return (Xft xftdraw)
else
#endif
(initCoreFont s >>= (return . Core))
#ifdef XFT
where xftPrefix = "xft:"
#endif
releaseXMF :: XMonadFont -> X ()
releaseXMF (Core fs) = releaseCoreFont fs
#ifdef XFT
releaseXMF (Xft xftfont) = do
dpy <- asks display
io $ xftFontClose dpy xftfont
#endif
textWidthXMF :: MonadIO m => Display -> XMonadFont -> String -> m Int
textWidthXMF _ (Core fs) s = return $ fi $ textWidth fs s
#ifdef XFT
textWidthXMF dpy (Xft xftdraw) s = liftIO $ do
gi <- xftTextExtents dpy xftdraw s
return $ xglyphinfo_width gi
#endif
textExtentsXMF :: MonadIO m => Display -> XMonadFont -> String -> m (FontDirection,Int32,Int32,CharStruct)
textExtentsXMF _ (Core fs) s = return $ textExtents fs s
#ifdef XFT
textExtentsXMF _ (Xft xftfont) _ = liftIO $ do
ascent <- xftfont_ascent xftfont
descent <- xftfont_descent xftfont
return (error "Font direction touched", fi ascent, fi descent, error "Font overall size touched")
#endif
-- | String position
data Align = AlignCenter | AlignRight | AlignLeft
-- | Return the string x and y 'Position' in a 'Rectangle', given a
-- 'FontStruct' and the 'Align'ment
stringPosition :: XMonadFont -> Rectangle -> Align -> String -> X (Position,Position)
stringPosition fs (Rectangle _ _ w h) al s = do
dpy <- asks display
width <- io $ textWidthXMF dpy fs s
(_,a,d,_) <- io $ textExtentsXMF dpy fs s
let y = fi $ ((h - fi (a + d)) `div` 2) + fi a;
x = case al of
AlignCenter -> fi (w `div` 2) - fi (width `div` 2)
AlignLeft -> 1
AlignRight -> fi (w - (fi width + 1));
return (x,y)
printStringXMF :: MonadIO m => Display -> Drawable -> XMonadFont -> GC -> String -> String
-> Position -> Position -> String -> m ()
printStringXMF d p (Core fs) gc fc bc x y s = liftIO $ do
setFont d gc $ fontFromFontStruct fs
[fc',bc'] <- mapM (stringToPixel d) [fc,bc]
setForeground d gc fc'
setBackground d gc bc'
drawImageString d p gc x y s
#ifdef XFT
printStringXMF dpy drw (Xft font) _ fc _ x y s = do
let screen = defaultScreenOfDisplay dpy;
colormap = defaultColormapOfScreen screen;
visual = defaultVisualOfScreen screen;
liftIO $ withXftDraw dpy drw visual colormap $
\draw -> withXftColorName dpy visual colormap fc $
\color -> xftDrawString draw color font x y s
#endif
-- | Short-hand for 'fromIntegral'
fi :: (Integral a, Num b) => a -> b
fi = fromIntegral
|
