If the client program is drip feeding us input at a rate faster than 1
character per mux_output_parser_coalesce_delay_ms (e.g. it is printing
output read from a serial port faster than this), we would previously
wait indefinitely for new input, because we would always poll with a new
timeout [...]delay_ms in the future. In the worst case, this would create
a busy loop that starves the other panes of an opportunity to read from
their ptys, making all of them unresponsive. Address this by making a
note of when the first character was read, and do not wait longer than
[...]delay_ms after this time.
Fixes#3466.
https://github.com/wez/wezterm/discussions/3480#discussioncomment-5567569
mentioned that running `wezterm cli spawn --domain-name SSH:foo`,
closing that tab and running `wezterm cli spawn --domain-name SSH:foo`
again failed.
The error message had no useful context.
This commit adds more context.
The stack trace in https://github.com/wez/wezterm/issues/3425
shows a recursive borrow triggered indirectly by spawning
a subprocess and having that trigger the wndproc.
This commit doesn't really fix the recursive problem, but may
sidestep it, and it's probably best to avoid always running
the `wsl` command to get this list anyway, similar to the
change in 25255d90d6
refs: https://github.com/wez/wezterm/issues/3425
If the target domain_id doesn't match the source pane.domain_id(),
then we consider the filesystem namespace to be incompatible and
won't try to use it.
refs: https://github.com/wez/wezterm/issues/3442
This commit teaches the config about SerialDomains, and the mux
layer about constructing a SerialDomain, then changes the GUI
layer to use those pieces to set up `wezterm serial`.
A new `serial_ports` config is added, and the GUI layer knows how
to apply it to the set of domains in the mux.
The result of this is that you can now define a domain for each
serial port and spawn a serial connection into a new tab or window
in your running wezterm gui instance.
Three issues:
* The initial connect would leave the dpi assigned to 0, resulting
in incorrect scaling when using imgcat until the window was resized
and the correct dpi was passed up.
* On resize, we'd only compare the row/col count and not notice changes
in pixel dimensions/dpi
* On the server side, when processing a resize and recomputing
the tab size, we would omit the pixel dimensions and leave
the resulting tabs and panes with 0 dimensions, breaking imgcat
because it thought the window was 0x0.
refs: https://github.com/wez/wezterm/issues/3366
This commit causes the mux to generate a PaneFocused notification
when the active pane is changed.
The mux server will forward that as a unilateral PDU to connected
clients.
The clientpane implementation will handle that by applying the
same state to the local mux.
refs: #2863
Previously, when resizing a tab, we'd unzoom it, recompute the resize
deltas and adjust every pane's non-zoomed position and re-zoom the
original pane.
When the alt screen is active, wezterm doesn't reflow resized lines,
and there a number of situations where the only effective change to
the line was updating a seqno; the content of those panes doesn't
actually update until the application(s) attached to the PTY
receive SIGWINCH from the kernel.
Since we were resizing the zoomed pane twice in quick succession
we could double-tap SIGWINCH and the application might coalesce
and process only one of the resize events.
The result of that was that we might see the state from either
the first or second resize event and then not get any other updates
until the application repainted itself.
This commit re-structures the resize behavior around zooms so that
we only resize the zoomed pane. When unzooming we'll fixup the
no-zoomed sizes for the whole tab. That means that we need to
store the pre-zoom size in order to correctly calculate those
sizes for the case where a pane was zoomed, the tab resized, and
then the pane was unzoomed again.
refs: https://github.com/wez/wezterm/issues/3068
Threads through a GuiPosition from mux window creation to allow it to be
used when the corresponding gui window is created.
SpawnCommand now has an optional position field to use for that purpose.
```lua
wezterm.mux.spawn_window {
position = {
x = 10,
y = 300,
-- Optional origin to use for x and y.
-- Possible values:
-- * "ScreenCoordinateSystem" (this is the default)
-- * "MainScreen" (the primary or main screen)
-- * "ActiveScreen" (whichever screen hosts the active/focused window)
-- * {Named="HDMI-1"} - uses a screen by name. See wezterm.gui.screens()
-- origin = "ScreenCoordinateSystem"
},
}
```
refs: https://github.com/wez/wezterm/issues/2976
The tcgetpgrp call appears to have high variance in latency, ranging
from 200-700us on my system.
If you have 10 tabs and mouse over the tab bar, that's around 7ms
spent per frame just figuring out the foreground process; that doesn't
include actually extracting the process executable or current working
directory paths.
This was exacerbated by the mouse move events triggering a tab bar
recompute on every pixel of mouse movement.
This commit takes the following steps to resolve this:
* We now only re-compute the tab bar when the UI item is changed by
a mouse movement
* A simple single-item cache is now used on unix that allows the caller
to proceed quickly with stale-but-probably-still-mostly-accurate data
while queuing up an update to a background thread which can absorb
the latency.
The result of this is that hovering over several tabs in quick
succession no longer takes a noticeable length of time to render the
hover, but the consequence is that the contents of a given tab may be
stale by 300-400ms.
I think that trade-off is worth while.
We already have a similar trade-off on Windows, although we don't
yet do the updates in a different thread on Windows. Perhaps in
a follow up commit?
refs: https://github.com/wez/wezterm/issues/2991
Avoids:
```
warning: the following packages contain code that will be rejected by a future version of Rust: ntapi v0.3.7
note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 36`
```
This allows removing a bunch of unwrap/expect calls.
However, my primary motive was to replace the cases where we used
Mux::get() == None to indicate that we were not on the main thread.
A separate API has been added to test for that explicitly rather than
implicitly.
This is a step towards making it Send+Sync.
I'm a little cagey about this in the long term, as there are some mux
operations that may technically require multiple fields to be locked for
their duration: allowing free-threaded access may introduce some subtle
(or not so subtle!) interleaving conditions where the overall mux state
is not yet consistent.
I'm thinking of prune_dead_windows kicking in while the mux is in the
middle of being manipulated.
I did try an initial pass of just moving everything under one lock, but
there is already quite a lot of mixed read/write access to different
aspects of the mux.
We'll see what bubbles up later!
Now that we use Arc<Pane> we can directly pass the pane to the
background thread that we're using to parse the terminal output, cutting
out some context switching and reducing the latency between output and
rendering that output.
