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{-# LANGUAGE CPP #-}
{-# LANGUAGE TupleSections #-}
------------------------------------------------------------------------------
-- |
-- 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 _ _ 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 _ _ 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 -> NE.NonEmpty 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
voff = safeIndex voffs 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 fontst voff 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 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 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 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"
|
