At some recent point in history, I effective broke multiple tabs in
`wezterm ssh HOST` by allowing them to contend in weird ways on locks,
leading to a horribly sluggish experience where multiple keypresses
in alternate tabs would appear to be swallowed until IO happened in
another tab. Yuk!
This commit fixes that up by teaching channels how to wait cooperatively
and to attempt a read in all waiting channels when the fd becomes
readable.
I'm adding this primarily to avoid repeatedly showing "No more
fallbacks" errors when moving the mouse over a terminal that contains
cells with no matching glyphs.
It has the nice side effect of changing the typical opengl tab render
time from ~2.9ms to ~1.3ms.
The opengl based render first clears the window to the background
color and then renders the cells over the top.
on macOS I noticed a weird lighter strip to the bottom and right of
the window and ran it down to the initial clear: our colors are SRGB
rather than plain RGB and the discrepancy from rendering SRGB as RGB
results in the color being made a brighter shade. This was less
noticeable for black backgrounds.
Remove a normalizing function that made assumptions based on the
keycaps that did not hold up when selecting Dvorak as an input
source. For example "CTRL-C" where `C` is the key with the C keycap
would send `CTRL-C` even when Dvorak was selected; it should send CTRL-J
in that layout.
I think with the other normalization that happens in the termwindow
layer we don't need this function any more.
We now display a list of tabs and allow selecting them with either
the up/down arrows or the k/j keys. Enter activates the selected
tab, Escape cancels the overlay.
An overlay is a little termwiz app that can be overlaid over the
content of a gui tab.
The intent is for these to provide the mechanism for meta operations;
listing all tabs in a long-form list and switching between them,
dropping into configuration or error log review and so on.
We now show a little status window when we're making a connection
for a remote mux domain.
This should make things feel slightly nicer if there is a connectivity
problem.
refs: https://github.com/wez/wezterm/issues/127
