summaryrefslogtreecommitdiffhomepage
path: root/src/Xmobar/X11/Draw.hs
blob: 8906da2bd515142b54749be9190bf3f879e93101 (plain)
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
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
{-# LANGUAGE CPP #-}

------------------------------------------------------------------------------
-- |
-- Module: Xmobar.X11.Draw
-- Copyright: (c) 2018, 2020 Jose Antonio Ortega Ruiz
-- License: BSD3-style (see LICENSE)
--
-- Maintainer: jao@gnu.org
-- Stability: unstable
-- Portability: portable
-- Created: Sat Nov 24, 2018 18:49
--
--
-- Drawing the xmobar contents
--
------------------------------------------------------------------------------


module Xmobar.X11.Draw (drawInWin) where

import Prelude hiding (lookup)
import Control.Monad.IO.Class
import Control.Monad.Reader
import Control.Arrow ((&&&))
import Data.Map hiding ((\\), foldr, map, filter)
import Data.List ((\\))
import qualified Data.List.NonEmpty as NE

import Graphics.X11.Xlib hiding (textExtents, textWidth)
import Graphics.X11.Xlib.Extras

import Xmobar.Config.Types
import qualified Xmobar.X11.Bitmap as B
import Xmobar.X11.Actions (Action(..))
import Xmobar.X11.Types
import Xmobar.X11.Text
import Xmobar.X11.ColorCache
import Xmobar.X11.Window (drawBorder)
import Xmobar.X11.Parsers hiding (parseString)
import Xmobar.System.Utils (safeIndex)

#ifdef XFT
import Xmobar.X11.MinXft
import Graphics.X11.Xrender
#endif

fi :: (Integral a, Num b) => a -> b
fi = fromIntegral

-- | Draws in and updates the window
drawInWin :: Rectangle -> [[(Widget, TextRenderInfo, Int, Maybe [Action])]] -> X ()
drawInWin wr@(Rectangle _ _ wid ht) ~[left,center,right] = do
  r <- ask
  let (c,d) = (config &&& display) r
      (w,(fs,vs)) = (window &&& fontListS &&& verticalOffsets) r
      strLn = liftIO . mapM getWidth
      iconW i = maybe 0 B.width (lookup i $ iconS r)
      getWidth (Text s,cl,i,_) =
        textWidth d (safeIndex fs i) s >>= \tw -> return (Text s,cl,i,fi tw)
      getWidth (Icon s,cl,i,_) = return (Icon s,cl,i,fi $ iconW s)

  p <- liftIO $ createPixmap d w wid ht
                         (defaultDepthOfScreen (defaultScreenOfDisplay d))
#if XFT
  when (alpha c /= 255) (liftIO $ drawBackground d p (bgColor c) (alpha c) wr)
#else
  _ <- return wr
#endif
  withColors d [bgColor c, borderColor c] $ \[bgcolor, bdcolor] -> do
    gc <- liftIO $ createGC  d w
#if XFT
    when (alpha c == 255) $ do
#else
    do
#endif
      liftIO $ setForeground d gc bgcolor
      liftIO $ fillRectangle d p gc 0 0 wid ht
    -- write to the pixmap the new string
    printStrings p gc fs vs 1 L [] =<< strLn left
    printStrings p gc fs vs 1 R [] =<< strLn right
    printStrings p gc fs vs 1 C [] =<< strLn center
    -- draw border if requested
    liftIO $ drawBorder (border c) (borderWidth c) d p gc bdcolor wid ht
    -- copy the pixmap with the new string to the window
    liftIO $ copyArea d p w gc 0 0 wid ht 0 0
    -- free up everything (we do not want to leak memory!)
    liftIO $ freeGC d gc
    liftIO $ freePixmap d p
    -- resync
    liftIO $ sync d True

verticalOffset :: (Integral b, Integral a, MonadIO m) =>
                  a -> Widget -> XFont -> Int -> Config -> m b
verticalOffset ht (Text t) fontst voffs _
  | voffs > -1 = return $ fi voffs
  | otherwise = do
     (as,ds) <- liftIO $ textExtents fontst t
     let margin = (fi ht - fi ds - fi as) `div` 2
     return $ fi as + margin - 1
verticalOffset ht (Icon _) _ _ conf
  | iconOffset conf > -1 = return $ fi (iconOffset conf)
  | otherwise = return $ fi (ht `div` 2) - 1

printString :: Display -> Drawable -> XFont -> GC -> String -> String
            -> Position -> Position -> Position -> Position -> String -> Int -> IO ()
printString d p (Core fs) gc fc bc x y ay ht s a = do
    setFont d gc $ fontFromFontStruct fs
    withColors d [fc, bc] $ \[fc', bc'] -> do
      setForeground d gc fc'
      when (a == 255) (setBackground d gc bc')
      drawImageString d p gc x y s

printString d p (Utf8 fs) gc fc bc x y ay ht s a =
    withColors d [fc, bc] $ \[fc', bc'] -> do
      setForeground d gc fc'
      when (a == 255) (setBackground d gc bc')
      liftIO $ wcDrawImageString d p fs gc x y s

#ifdef XFT
printString dpy drw fs@(Xft fonts) _ fc bc x y ay ht s al =
  withDrawingColors dpy drw fc bc $ \draw fc' bc' -> do
    when (al == 255) $ do
      (a,d)  <- textExtents fs s
      gi <- xftTxtExtents' dpy fonts s
      if ay < 0
        then drawXftRect draw bc' x (y - a) (1 + xglyphinfo_xOff gi) (a + d + 2)
        else drawXftRect draw bc' x ay (1 + xglyphinfo_xOff gi) ht
    drawXftString' draw fc' fonts (toInteger x) (toInteger y) s
#endif

-- | An easy way to print the stuff we need to print
printStrings :: Drawable -> GC -> NE.NonEmpty XFont -> [Int] -> Position
             -> Align -> [((Position, Position), Box)] -> [(Widget, TextRenderInfo, Int, Position)] -> X ()
printStrings _ _ _ _ _ _ _ [] = return ()
printStrings dr gc fontlist voffs offs a boxes sl@((s,c,i,l):xs) = do
  r <- ask
  let (conf,d) = (config &&& display) r
      alph = alpha conf
      Rectangle _ _ wid ht = rect r
      totSLen = foldr (\(_,_,_,len) -> (+) len) 0 sl
      remWidth = fi wid - fi totSLen
      fontst = safeIndex fontlist i
      offset = case a of
                 C -> (remWidth + offs) `div` 2
                 R -> remWidth
                 L -> offs
      (fc,bc) = case break (==',') (tColorsString c) of
                 (f,',':b) -> (f, b           )
                 (f,    _) -> (f, bgColor conf)
  valign <- verticalOffset ht s (NE.head fontlist) (voffs !! i) conf
  let (ht',ay) = case (tBgTopOffset c, tBgBottomOffset c) of
                   (-1,_)  -> (0, -1)
                   (_,-1)  -> (0, -1)
                   (ot,ob) -> ((fromIntegral ht) - ot - ob, ob)
  case s of
    (Text t) -> liftIO $ printString d dr fontst gc fc bc offset valign ay ht' t alph
    (Icon p) -> liftIO $ maybe (return ())
                           (B.drawBitmap d dr gc fc bc offset valign)
                           (lookup p (iconS r))
  let x2 = offset + l - 1
  let triBoxes = tBoxes c
      dropBoxes = filter (\(_,b) -> not(b `elem` triBoxes)) boxes
      boxes' = map (\((x1,_),b) -> ((x1, x2), b)) (filter (\(_,b) -> b `elem` triBoxes) boxes)
            ++ map (\b -> ((offset - 1, x2), b)) (triBoxes \\ (map snd boxes))
  if Prelude.null xs
    then liftIO $ drawBoxes d dr gc (fromIntegral ht) (dropBoxes ++ boxes')
    else liftIO $ drawBoxes d dr gc (fromIntegral ht) dropBoxes
  printStrings dr gc fontlist voffs (offs + l) a boxes' xs

drawBoxes :: Display -> Drawable -> GC -> Position -> [((Position, Position), Box)] -> IO ()
drawBoxes _ _ _ _ [] = return ()
drawBoxes d dr gc ht (b:bs) = do
  let (xx, Box pos alg offset lineWidth fc) = b
  withColors d [fc] $ \[fc'] -> do
    setForeground d gc fc'
    setLineAttributes d gc lineWidth lineSolid capNotLast joinMiter
    case pos of
      BBVBoth -> do
        drawBoxBorder d dr gc BBTop    alg offset ht xx
        drawBoxBorder d dr gc BBBottom alg offset ht xx
      BBHBoth -> do
        drawBoxBorder d dr gc BBLeft   alg offset ht xx
        drawBoxBorder d dr gc BBRight  alg offset ht xx
      BBFull  -> do
        drawBoxBorder d dr gc BBTop    alg offset ht xx
        drawBoxBorder d dr gc BBBottom alg offset ht xx
        drawBoxBorder d dr gc BBLeft   alg offset ht xx
        drawBoxBorder d dr gc BBRight  alg offset ht xx
      _ -> drawBoxBorder d dr gc pos   alg offset ht xx
  drawBoxes d dr gc ht bs

drawBoxBorder :: Display -> Drawable -> GC -> BoxBorder -> Align -> Position -> Position -> (Position, Position) -> IO ()
drawBoxBorder d dr gc pos alg offset ht (x1,x2) = do
  let (p1,p2) = case alg of
                 L -> (0,      (-offset))
                 C -> (offset, (-offset))
                 R -> (offset, 0        )
  case pos of
    BBTop    -> drawLine d dr gc (x1 + p1) 0  (x2 + p2) 0
    BBBottom -> drawLine d dr gc (x1 + p1) (ht - 1) (x2 + p2) (ht - 1)
    BBLeft   -> drawLine d dr gc x1 p1 x1 (ht + p2)
    BBRight  -> drawLine d dr gc x2 p1 x2 (ht + p2)