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buggy boolean blindness

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`ManageDebug` was continuing to report in the `logHook` even after
the `manageHook` was done. In diagnosing this, I discovered that
the original code was using a tuple of `Bool`s and not even a
comment about which meant what.

The code now uses a proper pair type, and dedicated `data`s for
the two flags that make it clear what each means. This also fixed
the bug, so apparently I had the `Bool`s confused somewhere.

I also took the chance to clarify the documentation a little (a
misleading "persistent", since it doesn't use persistent XS) and
a few more cleanups. Also, it now logs all `manageHook` runs
before the `logHook` in case multiple windows are opened.
This commit is contained in:
brandon s allbery kf8nh 2022-04-14 16:30:02 -04:00
parent 923c5a2548
commit 80776d8969
1 changed files with 25 additions and 17 deletions
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38
XMonad/Hooks/ManageDebug.hs
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@ -28,16 +28,17 @@ module XMonad.Hooks.ManageDebug (debugManageHook
) where
import XMonad
import XMonad.Prelude (when)
import XMonad.Hooks.DebugStack
import XMonad.Util.DebugWindow
import XMonad.Util.EZConfig
import qualified XMonad.Util.ExtensibleState as XS
-- persistent state for manageHook debugging to trigger logHook debugging
newtype ManageStackDebug = MSD (Bool,Bool)
-- state for manageHook debugging to trigger logHook debugging
data MSDFinal = DoLogHook | SkipLogHook deriving Show
data MSDTrigger = MSDActivated | MSDInactive deriving Show
data ManageStackDebug = MSD MSDFinal MSDTrigger deriving Show
instance ExtensionClass ManageStackDebug where
initialValue = MSD (False,False)
initialValue = MSD SkipLogHook MSDInactive
-- | A combinator to add full 'ManageHook' debugging in a single operation.
debugManageHook :: XConfig l -> XConfig l
@ -61,7 +62,7 @@ debugManageHookOn key cf = cf {logHook = manageDebugLogHook <+> logHook cf
-- final 'StackSet' state.
--
-- Note that the initial state shows only the current workspace; the final
-- one shows all workspaces, since your 'ManageHook' might use e.g. 'doShift',
-- one shows all workspaces, since your 'manageHook' might use e.g. 'doShift',
manageDebug :: ManageHook
manageDebug = do
w <- ask
@ -69,31 +70,38 @@ manageDebug = do
trace "== manageHook; current stack =="
debugStackString >>= trace
ws <- debugWindow w
trace $ "new:\n " ++ ws
XS.modify $ \(MSD (_,key)) -> MSD (True,key)
trace $ "new window:\n " ++ ws
-- technically we don't care about go here, since only maybeManageDebug
-- uses it
XS.modify $ \(MSD _ go') -> MSD DoLogHook go'
idHook
-- | @manageDebug@ only if the user requested it with @debugNextManagedWindow@.
maybeManageDebug :: ManageHook
maybeManageDebug = do
go <- liftX $ do
MSD (log_,go') <- XS.get
XS.put $ MSD (log_,False)
MSD _ go' <- XS.get
-- leave it active, as we may manage multiple windows before the logHook
-- so we now deactivate it in the logHook
return go'
if go then manageDebug else idHook
case go of
MSDActivated -> manageDebug
_ -> idHook
-- | If @manageDebug@ has set the debug-stack flag, show the stack.
manageDebugLogHook :: X ()
manageDebugLogHook = do
MSD (go,key) <- XS.get
when go $ do
MSD log' _ <- XS.get
case log' of
DoLogHook -> do
trace "== manageHook; final stack =="
debugStackFullString >>= trace
XS.put $ MSD (False,key)
idHook
-- see comment in maybeManageDebug
XS.put $ MSD SkipLogHook MSDInactive
_ -> idHook
-- | Request that the next window to be managed be @manageDebug@-ed. This can
-- be used anywhere an X action can, such as key bindings, mouse bindings
-- (presumably with 'const'), 'startupHook', etc.
debugNextManagedWindow :: X ()
debugNextManagedWindow = XS.modify $ \(MSD (log_,_)) -> MSD (log_,True)
debugNextManagedWindow = XS.modify $ \(MSD log' _) -> MSD log' MSDActivated