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X.U.Font: Add a fallback font to initXMF

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In case a font could not be opened, simply fall back to "xft:monospace"
and open that.  The initCoreFont and initUtf8Font functions already have
mechanisms like this, is was just missing from initXMF.

Closes: https://github.com/xmonad/xmonad-contrib/issues/723
This commit is contained in:
Tony Zorman 2022-09-15 18:58:36 +02:00
parent b0fc55499d
commit 4a3f8eb032
1 changed files with 5 additions and 2 deletions
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7
XMonad/Util/Font.hs
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@ -123,12 +123,15 @@ initXMF s =
if xftPrefix `isPrefixOf` s then
do dpy <- asks display
let fonts = case wordsBy (== ',') (drop (length xftPrefix) s) of
[] -> "xft:monospace" :| [] -- NE.singleton only in base 4.15
[] -> fallback :| [] -- NE.singleton only in base 4.15
(x : xs) -> x :| xs
Xft <$> io (traverse (openFont dpy) fonts)
fb <- io $ openFont dpy fallback
fmap Xft . io $ traverse (\f -> E.catch (openFont dpy f) (econst $ pure fb))
fonts
else Utf8 <$> initUtf8Font s
where
xftPrefix = "xft:"
fallback = "xft:monospace"
openFont dpy str = xftFontOpen dpy (defaultScreenOfDisplay dpy) str
wordsBy p str = case dropWhile p str of
"" -> []