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authorSibi Prabakaran <sibi@psibi.in>2020-05-10 19:43:56 +0530
committerSibi Prabakaran <sibi@psibi.in>2020-05-10 19:43:56 +0530
commit3e9e1cb9d300e13109206496d825351c4f41cc1c (patch)
treed40f6c9f185ea4b01b6652e4178a5f28e450c8fa /src/Xmobar
parent6f3b730415147041ff34558fe7292a76dc87b1f0 (diff)
downloadxmobar-3e9e1cb9d300e13109206496d825351c4f41cc1c.tar.gz
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Fix crashes/busy looping happening via index
Right now, with the `StdinReader` plugin enabled - you can crash/cause busy looping of xmobar if the following html file is opened: ``` <html> <head> <title>hello <fn=1>string</fn> </title> </head> </html> ``` More details about this bug is here: https://github.com/jaor/xmobar/issues/442#issuecomment-625706001 This MR also fixes another bug which produces a crash in xmobar if you pass non integer items between fn: <fn=crash>
Diffstat (limited to 'src/Xmobar')
-rw-r--r--src/Xmobar/App/EventLoop.hs6
-rw-r--r--src/Xmobar/App/Main.hs3
-rw-r--r--src/Xmobar/System/Utils.hs24
-rw-r--r--src/Xmobar/X11/Draw.hs10
-rw-r--r--src/Xmobar/X11/Parsers.hs3
-rw-r--r--src/Xmobar/X11/Types.hs3
6 files changed, 38 insertions, 11 deletions
diff --git a/src/Xmobar/App/EventLoop.hs b/src/Xmobar/App/EventLoop.hs
index f6ab932..cad95a5 100644
--- a/src/Xmobar/App/EventLoop.hs
+++ b/src/Xmobar/App/EventLoop.hs
@@ -40,6 +40,7 @@ import Control.Exception (bracket_, handle, SomeException(..))
import Data.Bits
import Data.Map hiding (foldr, map, filter)
import Data.Maybe (fromJust, isJust)
+import qualified Data.List.NonEmpty as NE
import Xmobar.System.Signal
import Xmobar.Config.Types
@@ -52,6 +53,7 @@ import Xmobar.X11.Text
import Xmobar.X11.Draw
import Xmobar.X11.Bitmap as Bitmap
import Xmobar.X11.Types
+import Xmobar.System.Utils (safeIndex)
#ifndef THREADED_RUNTIME
import Xmobar.X11.Events(nextEvent')
@@ -208,7 +210,7 @@ eventLoop tv xc@(XConf d r w fs vos is cfg) as signal = do
eventLoop tv xc as signal
reposWindow rcfg = do
- r' <- repositionWin d w (head fs) rcfg
+ r' <- repositionWin d w (NE.head fs) rcfg
eventLoop tv (XConf d r' w fs vos is rcfg) as signal
updateConfigPosition ocfg =
@@ -262,7 +264,7 @@ updateActions conf (Rectangle _ _ wid _) ~[left,center,right] = do
strLn :: [(Widget, String, Int, Maybe [Action])] -> IO [(Maybe [Action], Position, Position)]
strLn = liftIO . mapM getCoords
iconW i = maybe 0 Bitmap.width (lookup i $ iconS conf)
- getCoords (Text s,_,i,a) = textWidth d (fs!!i) s >>= \tw -> return (a, 0, fi tw)
+ 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)
partCoord off xs = map (\(a, x, x') -> (fromJust a, x, x')) $
filter (\(a, _,_) -> isJust a) $
diff --git a/src/Xmobar/App/Main.hs b/src/Xmobar/App/Main.hs
index e0b0329..f173e12 100644
--- a/src/Xmobar/App/Main.hs
+++ b/src/Xmobar/App/Main.hs
@@ -29,6 +29,7 @@ import System.Environment (getArgs)
import System.FilePath
import System.FilePath.Posix (takeBaseName, takeDirectory)
import Text.Parsec.Error (ParseError)
+import Data.List.NonEmpty (NonEmpty(..))
import Graphics.X11.Xlib
@@ -63,7 +64,7 @@ xmobar conf = withDeferSignals $ do
let ic = Map.empty
to = textOffset conf
ts = textOffsets conf ++ replicate (length fl) (-1)
- startLoop (XConf d r w (fs:fl) (to:ts) ic conf) sig refLock vars
+ startLoop (XConf d r w (fs :| fl) (to:ts) ic conf) sig refLock vars
configFromArgs :: Config -> IO Config
configFromArgs cfg = getArgs >>= getOpts >>= doOpts cfg . fst
diff --git a/src/Xmobar/System/Utils.hs b/src/Xmobar/System/Utils.hs
index 59c485c..33f221c 100644
--- a/src/Xmobar/System/Utils.hs
+++ b/src/Xmobar/System/Utils.hs
@@ -17,11 +17,16 @@
------------------------------------------------------------------------------
-module Xmobar.System.Utils (expandHome, changeLoop, onSomeException)
-where
+module Xmobar.System.Utils
+ ( expandHome
+ , changeLoop
+ , onSomeException
+ , safeIndex
+ ) where
import Control.Monad
import Control.Concurrent.STM
+import qualified Data.List.NonEmpty as NE
import System.Environment
import System.FilePath
@@ -50,3 +55,18 @@ onSomeException :: IO a -> (SomeException -> IO b) -> IO a
onSomeException io what = io `catch` \e -> do _ <- what e
throwIO (e :: SomeException)
+(!!?) :: [a] -> Int -> Maybe a
+(!!?) xs i
+ | i < 0 = Nothing
+ | otherwise = go i xs
+ where
+ go :: Int -> [a] -> Maybe a
+ go 0 (x:_) = Just x
+ go j (_:ys) = go (j - 1) ys
+ go _ [] = Nothing
+{-# INLINE (!!?) #-}
+
+safeIndex :: NE.NonEmpty a -> Int -> a
+safeIndex xs index = case (NE.toList xs) !!? index of
+ Nothing -> NE.head xs
+ Just value -> value
diff --git a/src/Xmobar/X11/Draw.hs b/src/Xmobar/X11/Draw.hs
index 23003b3..b7f58ca 100644
--- a/src/Xmobar/X11/Draw.hs
+++ b/src/Xmobar/X11/Draw.hs
@@ -25,6 +25,7 @@ import Control.Monad.Reader
import Control.Monad (when)
import Control.Arrow ((&&&))
import Data.Map hiding (foldr, map, filter)
+import qualified Data.List.NonEmpty as NE
import Graphics.X11.Xlib hiding (textExtents, textWidth)
import Graphics.X11.Xlib.Extras
@@ -37,6 +38,7 @@ import Xmobar.X11.Text
import Xmobar.X11.ColorCache
import Xmobar.X11.Window (drawBorder)
import Xmobar.X11.Parsers (Widget(..))
+import Xmobar.System.Utils (safeIndex)
#ifdef XFT
import Xmobar.X11.MinXft
@@ -55,7 +57,7 @@ drawInWin wr@(Rectangle _ _ wid ht) ~[left,center,right] = do
strLn = liftIO . mapM getWidth
iconW i = maybe 0 B.width (lookup i $ iconS r)
getWidth (Text s,cl,i,_) =
- textWidth d (fs!!i) s >>= \tw -> return (Text s,cl,i,fi tw)
+ 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
@@ -126,7 +128,7 @@ printString dpy drw fs@(Xft fonts) _ fc bc x y s al =
#endif
-- | An easy way to print the stuff we need to print
-printStrings :: Drawable -> GC -> [XFont] -> [Int] -> Position
+printStrings :: Drawable -> GC -> NE.NonEmpty XFont -> [Int] -> Position
-> Align -> [(Widget, String, Int, Position)] -> X ()
printStrings _ _ _ _ _ _ [] = return ()
printStrings dr gc fontlist voffs offs a sl@((s,c,i,l):xs) = do
@@ -136,7 +138,7 @@ printStrings dr gc fontlist voffs offs a sl@((s,c,i,l):xs) = do
Rectangle _ _ wid ht = rect r
totSLen = foldr (\(_,_,_,len) -> (+) len) 0 sl
remWidth = fi wid - fi totSLen
- fontst = fontlist !! i
+ fontst = safeIndex fontlist i
offset = case a of
C -> (remWidth + offs) `div` 2
R -> remWidth
@@ -144,7 +146,7 @@ printStrings dr gc fontlist voffs offs a sl@((s,c,i,l):xs) = do
(fc,bc) = case break (==',') c of
(f,',':b) -> (f, b )
(f, _) -> (f, bgColor conf)
- valign <- verticalOffset ht s (head fontlist) (voffs !! i) conf
+ valign <- verticalOffset ht s (NE.head fontlist) (voffs !! i) conf
case s of
(Text t) -> liftIO $ printString d dr fontst gc fc bc offset valign t alph
(Icon p) -> liftIO $ maybe (return ())
diff --git a/src/Xmobar/X11/Parsers.hs b/src/Xmobar/X11/Parsers.hs
index 7fa42d7..4c8a130 100644
--- a/src/Xmobar/X11/Parsers.hs
+++ b/src/Xmobar/X11/Parsers.hs
@@ -21,6 +21,7 @@ import Xmobar.X11.Actions
import Control.Monad (guard, mzero)
import Text.ParserCombinators.Parsec
+import Text.Read (readMaybe)
import Graphics.X11.Types (Button)
data Widget = Icon String | Text String
@@ -138,7 +139,7 @@ fontParser :: ColorString -> Maybe [Action]
-> Parser [(Widget, ColorString, FontIndex, Maybe [Action])]
fontParser c a = do
f <- between (string "<fn=") (string ">") colors
- s <- manyTill (allParsers c (read f) a) (try $ string "</fn>")
+ s <- manyTill (allParsers c (maybe 0 id $ readMaybe f) a) (try $ string "</fn>")
return (concat s)
-- | Parses a color specification (hex or named)
diff --git a/src/Xmobar/X11/Types.hs b/src/Xmobar/X11/Types.hs
index 333dc96..b22f807 100644
--- a/src/Xmobar/X11/Types.hs
+++ b/src/Xmobar/X11/Types.hs
@@ -20,6 +20,7 @@ module Xmobar.X11.Types (X, XConf (..)) where
import Graphics.X11.Xlib
import Control.Monad.Reader
import Data.Map
+import qualified Data.List.NonEmpty as NE
import Xmobar.X11.Bitmap
import Xmobar.X11.Text
@@ -33,7 +34,7 @@ data XConf =
XConf { display :: Display
, rect :: Rectangle
, window :: Window
- , fontListS :: [XFont]
+ , fontListS :: NE.NonEmpty XFont
, verticalOffsets :: [Int]
, iconS :: Map FilePath Bitmap
, config :: Config
generated by cgit v1.2.3 (git 2.46.0) at 2025-10-31 02:27:27 +0000