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|
{-# LANGUAGE CPP #-}
{-# LANGUAGE TupleSections #-}
------------------------------------------------------------------------------
-- |
-- Module: Xmobar.X11.XlibDraw
-- Copyright: (c) 2018, 2020, 2022 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 using Xlib and Xft primitives
--
------------------------------------------------------------------------------
module Xmobar.X11.XlibDraw (drawInPixmap, updateActions) where
import Prelude hiding (lookup)
import Control.Monad.IO.Class
import Control.Monad.Reader
import Data.Map hiding ((\\), foldr, map, filter)
import Data.List ((\\))
import Data.Maybe (fromJust, isJust)
import qualified Data.List.NonEmpty as NE
import Graphics.X11.Xlib hiding (textExtents, textWidth, Segment)
import Graphics.X11.Xlib.Extras
import Xmobar.Config.Types
import Xmobar.Run.Parsers hiding (parseString)
import Xmobar.Run.Actions
import qualified Xmobar.X11.Bitmap as B
import Xmobar.X11.Types
import Xmobar.X11.Text
import Xmobar.X11.ColorCache
import Xmobar.System.Utils (safeIndex)
fi :: (Integral a, Num b) => a -> b
fi = fromIntegral
drawInPixmap :: GC -> Pixmap -> Dimension -> Dimension -> [[Segment]] -> X ()
drawInPixmap gc p wid ht ~[left,center,right] = do
r <- ask
let c = config r
d = display r
fs = fontList r
strLn = liftIO . mapM getWidth
iconW i = maybe 0 B.width (lookup i $ iconCache 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)
getWidth (Hspace s,cl,i,_) = return (Hspace s,cl,i,fi s)
withColors d [bgColor c, borderColor c] $ \[bgcolor, bdcolor] -> do
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 1 L [] =<< strLn left
printStrings p gc fs 1 R [] =<< strLn right
printStrings p gc fs 1 C [] =<< strLn center
-- draw border if requested
liftIO $ drawBorder (border c) (borderWidth c) d p gc bdcolor wid ht
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
verticalOffset _ (Hspace _) _ voffs _ = return $ fi voffs
printString :: Display -> Drawable -> XFont -> GC
-> String -> String
-> Position -> Position -> Position -> Position
-> String -> Int
-> IO ()
printString d p fs gc fc bc x y _ _ 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
printStrings :: Drawable -> GC
-> NE.NonEmpty XFont
-> Position -> Align
-> [((Position, Position), Box)]
-> [(Widget, TextRenderInfo, Int, Position)]
-> X ()
printStrings _ _ _ _ _ _ [] = return ()
printStrings dr gc fontlist offs a boxes sl@((s,c,i,l):xs) = do
r <- ask
let conf = config r
d = 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) = colorComponents conf (tColorsString c)
valign <- verticalOffset ht s fontst (indexedOffset conf 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 (iconCache r))
(Hspace _) -> liftIO $ return ()
let triBoxes = tBoxes c
dropBoxes = filter (\(_,b) -> b `notElem` triBoxes) boxes
boxes' = map (\((x1,_),b) -> ((x1, offset + l), b))
(filter (\(_,b) -> b `elem` triBoxes) boxes)
++ map ((offset, offset + l),) (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 (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 bb offset lineWidth fc mgs) = b
lw = fromIntegral lineWidth :: Position
withColors d [fc] $ \[fc'] -> do
setForeground d gc fc'
setLineAttributes d gc lineWidth lineSolid capNotLast joinMiter
case bb of
BBVBoth -> do
drawBoxBorder d dr gc BBTop offset ht xx lw mgs
drawBoxBorder d dr gc BBBottom offset ht xx lw mgs
BBHBoth -> do
drawBoxBorder d dr gc BBLeft offset ht xx lw mgs
drawBoxBorder d dr gc BBRight offset ht xx lw mgs
BBFull -> do
drawBoxBorder d dr gc BBTop offset ht xx lw mgs
drawBoxBorder d dr gc BBBottom offset ht xx lw mgs
drawBoxBorder d dr gc BBLeft offset ht xx lw mgs
drawBoxBorder d dr gc BBRight offset ht xx lw mgs
_ -> drawBoxBorder d dr gc bb offset ht xx lw mgs
drawBoxes d dr gc ht bs
drawBoxBorder :: Display -> Drawable -> GC
-> BoxBorder -> BoxOffset
-> Position -> (Position, Position) -> Position
-> BoxMargins
-> IO ()
drawBoxBorder
d dr gc pos (BoxOffset alg offset) ht (x1,x2) lw (BoxMargins mt mr mb ml) = do
let (p1,p2) = case alg of
L -> (0, -offset)
C -> (offset, -offset)
R -> (offset, 0 )
lc = lw `div` 2
case pos of
BBTop -> drawLine d dr gc (x1 + p1) (mt + lc) (x2 + p2) (mt + lc)
BBBottom -> do
let lc' = max lc 1 + mb
drawLine d dr gc (x1 + p1) (ht - lc') (x2 + p2) (ht - lc')
BBLeft -> drawLine d dr gc (x1 - 1 + ml) p1 (x1 - 1 + ml) (ht + p2)
BBRight -> drawLine d dr gc (x2 + lc - 1 - mr) p1 (x2 + lc - 1 - mr) (ht + p2)
_ -> error "unreachable code"
drawBorder :: Border -> Int -> Display -> Drawable -> GC -> Pixel
-> Dimension -> Dimension -> IO ()
drawBorder b lw d p gc c wi ht = case b of
NoBorder -> return ()
TopB -> drawBorder (TopBM 0) lw d p gc c wi ht
BottomB -> drawBorder (BottomBM 0) lw d p gc c wi ht
FullB -> drawBorder (FullBM 0) lw d p gc c wi ht
TopBM m -> sf >> sla >>
drawLine d p gc 0 (fi m + boff) (fi wi) (fi m + boff)
BottomBM m -> let rw = fi ht - fi m + boff in
sf >> sla >> drawLine d p gc 0 rw (fi wi) rw
FullBM m -> let mp = fi m
pad = 2 * fi mp + fi lw
in sf >> sla >>
drawRectangle d p gc mp mp (wi - pad) (ht - pad)
where sf = setForeground d gc c
sla = setLineAttributes d gc (fi lw) lineSolid capNotLast joinMiter
boff = borderOffset b lw
borderOffset :: (Integral a) => Border -> Int -> a
borderOffset b lw =
case b of
BottomB -> negate boffs
BottomBM _ -> negate boffs
TopB -> boffs
TopBM _ -> boffs
_ -> 0
where boffs = calcBorderOffset lw
calcBorderOffset :: (Integral a) => Int -> a
calcBorderOffset = ceiling . (/2) . toDouble
where toDouble = fi :: (Integral a) => a -> Double
updateActions :: Rectangle -> [[Segment]] -> X [([Action], Position, Position)]
updateActions (Rectangle _ _ wid _) ~[left,center,right] = do
conf <- ask
let d = display conf
fs = fontList conf
strLn :: [Segment] -> IO [(Maybe [Action], Position, Position)]
strLn = liftIO . mapM getCoords
iconW i = maybe 0 B.width (lookup i $ iconCache conf)
getCoords (Text s,_,i,a) =
textWidth d (safeIndex fs i) s >>= \tw -> return (a, 0, fi tw)
getCoords (Icon s,_,_,a) = return (a, 0, fi $ iconW s)
getCoords (Hspace w,_,_,a) = return (a, 0, fi w)
partCoord off xs = map (\(a, x, x') -> (fromJust a, x, x')) $
filter (\(a, _,_) -> isJust a) $
scanl (\(_,_,x') (a,_,w') -> (a, x', x' + w'))
(Nothing, 0, off)
xs
totSLen = foldr (\(_,_,len) -> (+) len) 0
remWidth xs = fi wid - totSLen xs
offs = 1
offset a xs = case a of
C -> (remWidth xs + offs) `div` 2
R -> remWidth xs
L -> offs
liftIO $ fmap concat $ mapM (\(a,xs) ->
(\xs' -> partCoord (offset a xs') xs') <$> strLn xs) $
zip [L,C,R] [left,center,right]
|
