This change adds automatic bash shell detection and integration.
Unlike our other shell integrations, bash doesn't provide a built-in
mechanism for injecting our ghostty.bash script into the new shell
environment.
Instead, we start bash in POSIX mode and use the ENV environment
variable to load our integration script, and the rest of the bash
startup sequence becomes the responsibility of our script to emulate
(along with disabling POSIX mode).
We don't actually use libc wcswidth to determine width and even if we
did some terminals use wcwidth (which behaves differently), some use
the Python wcswidth library (which behaves differently), etc. The
reality is there is no real consistency on "legacy" behavior so by
naming it "legacy" we show that we're doing our best but also gives us
wiggle room to change our behavior in the future.
Functionally nothing changes with this commit.
Using a saturating addition here just to avoid overflow, since setCursorPos handles proper clamping to the screen size so we don't need to duplicate that logic.
Fixes#1403
This changes the behavior of `grapheme-width-method = unicode` to change
the default state of mode 2027 to true. Prior to this, setting this
config would force grapheme clustering regardless of mode 2027. Now,
this only sets the default and running TUI programs can disable it if
they want.
Fixes#1401
SCOSC is ambiguous with regards to DECSLRM. This commit copies the logic
of xterm: if left/right mode is enabled, then CSI S is always DECSLRM.
But if left/right mode is disabled then CSI S empty always uses SCOSC.
SCORC always works.
A lot of the state that we put on Exec is just there to copy to
StreamHandler, but we already have it in DerivedConfig. I think this
whole copy copy copy is just legacy cruft since termio.Exec is one of
the older parts of the source code.
This rearchitects the Exec struct to act more like Surface and Renderer
where it stores its derived config. This lets us avoid a few extra
allocations and removes a LOT of struct member noise from termio.Exec.
For pointer lifetimes, the memory allocated is now owned by
DerivedConfig. When changeConfig is called, its the only time BOTH are
still alive, so we can safely swap pointers and deinit without having to
duplicate across threads. This is the same as renderer/surface.
Fixes#1198
This adds a fix similar to what we discovered with termio messages: we
attempt to send a surface message but if the queue is full we unlock the
terminal state and try again waiting forever.
In all cases, its safe to unlock the mutex while sending the message, no
scenario we send a surface message requires this lock to be held.
