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X.Operations: Apply size hints in floatLocation

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This is hopefully harmless with well-behaved clients and ordinary xmonad
configs, and it enables using re-floating to apply size hints to
existing windows. The only visible behaviour change I can foresee is
that tiled windows (which ignore hints by default, unless
X.L.LayoutHints is used) will now snap to size hints whenever they're
floated (either via a keybinding or on mouseMoveWindow), whereas
previously they'd only do so on mouseResizeWindow.

My use-case for this is the following: when I change fonts in my
terminal, it updates its size hints and then sends a
ConfigureRequestEvent to change its size to keep the number of rows and
columns the same, and it also happens to reset the position to 0, 0. If
it's tiled, that request is just ignored and hintsEventHook handles the
layout refresh. If it happens to be floating, I want neither the move to
0, 0 nor the window size change to keep rows/colums, so I have a
handleEventHook that ignores that ConfigureRequestEvent and just
refloats the window, but I need a way to reapply size hints.

I could add a separate function that applies these hints to the floating
RationalRect, but that seems like a lossy operation due to the Doubles
in there. So I'd probably end up replicating most of the code from
floatLocation, and then I might just improve that instead… :-)

(I'll submit that custom ConfigureRequestEvent-ignoring hook to
xmonad-contrib later.)
This commit is contained in:
Tomas Janousek 2023-03-27 01:12:36 +02:00
parent 025a78508c
commit 69134f9e8a
2 changed files with 10 additions and 4 deletions
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4
CHANGES.md
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@ -14,6 +14,10 @@
* `Tall` does not draw windows with zero area.
* `XMonad.Operations.floatLocation` now applies size hints. This means windows
will snap to these hints as soon as they're floated (mouse move, keybinding).
Previously that only happened on mouse resize.
### Bug Fixes
* Duplicated floats (e.g. from X.A.CopyToAll) no longer escape to inactive

10
src/XMonad/Operations.hs
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@ -704,6 +704,7 @@ floatLocation w =
where go = withDisplay $ \d -> do
ws <- gets windowset
sh <- io $ getWMNormalHints d w
wa <- io $ getWindowAttributes d w
let bw = (fromIntegral . wa_border_width) wa
point_sc <- pointScreen (fi $ wa_x wa) (fi $ wa_y wa)
@ -718,13 +719,14 @@ floatLocation w =
sr = screenRect . W.screenDetail $ sc
x = (fi (wa_x wa) - fi (rect_x sr)) % fi (rect_width sr)
y = (fi (wa_y wa) - fi (rect_y sr)) % fi (rect_height sr)
width = fi (wa_width wa + bw*2) % fi (rect_width sr)
height = fi (wa_height wa + bw*2) % fi (rect_height sr)
(width, height) = applySizeHintsContents sh (wa_width wa, wa_height wa)
rwidth = fi (width + bw*2) % fi (rect_width sr)
rheight = fi (height + bw*2) % fi (rect_height sr)
-- adjust x/y of unmanaged windows if we ignored or didn't get pointScreen,
-- it might be out of bounds otherwise
rr = if managed || point_sc `sr_eq` Just sc
then W.RationalRect x y width height
else W.RationalRect (0.5 - width/2) (0.5 - height/2) width height
then W.RationalRect x y rwidth rheight
else W.RationalRect (0.5 - rwidth/2) (0.5 - rheight/2) rwidth rheight
return (W.screen sc, rr)