fix vertical text alignment calculation

the baseline (valign) is now set so the font will render with
equal vertical margin above and below the font extents

1 files changed, 2 insertions, 1 deletions

diff --git a/src/Xmobar.hs b/src/Xmobar.hs
index c126b7c..7befc18 100644
--- a/src/Xmobar.hs
+++ b/src/Xmobar.hs
@@ -315,7 +315,8 @@ printStrings dr gc fontst offs a sl@((s,c,l):xs) = do
   let (conf,d)             = (config &&& display) r
       Rectangle _ _ wid ht = rect r
       totSLen              = foldr (\(_,_,len) -> (+) len) 0 sl
-      valign               = -1 + (fi ht + fi (as + ds)) `div` 2
+      verticalMargin       = (fi ht) - fi (as + ds)
+      valign               = (fi ht) - (fi ds) - (verticalMargin `div` 2)
       remWidth             = fi wid - fi totSLen
       offset               = case a of
                                C -> (remWidth + offs) `div` 2