The control center fix applies to five more surfaces: the date menu,
the clipboard panel, the activity panel, notification toasts, and the
signal glass all opened 48 pixels under the bar while their own
expression asked for 12.
wlr-layer-shell has three behaviors and only the middle one is subtle.
A positive exclusiveZone reserves space; a negative one ignores what
others reserved; zero reserves nothing but RESPECTS what others
reserved. Every popover here uses zero, so the compositor had already
placed them below the bar before their own margin applied, and adding
Theme.barHeight counted the bar twice.
It is not a crash or a warning -- the surface simply opens lower than
written -- so a contract now holds the rule mechanically: a surface
with exclusiveZone 0 may not name Theme.barHeight in a margin. It also
checks the premise it rests on, and fails if the bar ever stops
reserving its own height rather than quietly checking the wrong thing.
Measured after: date menu and clipboard at 12px, control center at 2px,
each matching what its code asks for.
Claude-Session: https://claude.ai/code/session_01BRvzt4H8XXLPVH5MyYdk9L
WifiList and the notification toasts built their model from a plain
computed array, so any background property tick (a scan result, an
unrelated notification arriving) reassigned the whole array and the
Repeater destroyed and recreated every delegate -- including one with
an open, focused password field or an in-progress reply. Switched
both to a ScriptModel, which diffs by identity instead of resetting.
ValueSlider had its pointer-to-value mapping offset by 16px (the
hit-area margin was applied with the wrong sign), so 0% was
unreachable and every click landed to the right of where it was
placed -- affects every slider in the shell. SliderRow used -1 as a
sentinel for "nothing pending," which collides with legitimate
negative preference values like pointer sensitivity.
Dock intellihide read the globally focused workspace instead of each
monitor's own, so an empty workspace on one screen could hide the
dock on another; ActivityPanel rebuilt every row once a second during
a recording because the elapsed-time read lived in the model
construction instead of each row's own binding.
Claude-Session: https://claude.ai/code/session_01E6TJUAh41HaP25MVHWkhRZ
Gabriel Brown