This changes the ALT/dead key behavior a little bit more,
and in a way that is likely more useful to terminal users.
The default behavior is that system dead key processing is enabled.
For example, with DEU keyboard layout activated:
* `^` `<SPACE>` results in a single `^`
* `^` `e` result in those two characters combining into an e with a
diacritic.
If the config sets `use_dead_keys = false` then the behavior changes;
wezterm probes the active keymap to determine which keys are marked
as dead keys and computes their single character expansion. When
the dead key is pressed then that expansion is substituted instead.
So `^` is simply `^`.
In order to pull this off, the window layer needs to selectively
call `TranslateMessage` for the system dead key expansion case
instead of unconditionally in the global message loop.
As a result of *that*, it means that we don't perform the default ALT
key translation for every key press any more. I looked to see how old
friend putty handles this and found that it only allows default system
processing for ALT-space and ALT-F4. I was resistent to selectively
processing system shortcuts because the full set are effectively
unknowable to an application and I didn't want to try to replicate
a wide selection of varying keypresses. I'm fine to only allow
these two, so this commit does that, and reverts the portion of
the prior commit that prevented passing general ALT key combinations
through.
refs: #275
refs: #296
For some definition of improve, at least.
On Windows, ALT is basically reserved by the Window management
layer for functions such as ALT-space, ALT-F4 and so on.
Windows doesn't provide a method by which an application can
test whether a given key would be processed by the default
window procedure so we're in a bit of a bind in terms of
allowing ALT+a keypress to do something meaningful in the
terminal.
What I've settled on for now is:
On Windows only, if ALT is pressed, allow matching key assignments that
include ALT to be matched. If there are no key assignments, then DON'T
pass the key press to the active pane, and instead allow it to be passed
to DefWindowProc. This allows ALT-space to be handled correctly,
provided the user hasn't defined an ALT-space key assignment of their
own.
This may have some unforeseen consequences. For example, ALT-<number>
is a readline binding that repeats an argument a number of times.
This change "breaks" that, but the user can provide a key assignment
to `SendString` the equivalent sequence to restore that behavior.
I'm kindof hoping that no one notices, but I'm prepared to explicitly
add default key assignments for that.
The other aspect of this commit is that I now understand a bit better
what a dead key is and how they should be handled. I've tested the
behavior of wezterm with these changes and the behavior is consistent
with a regular CMD window when I have the DEU keymap active.
Specifically, using the on-screen keyboard, if I click `^` then click
`e` wezterm will emit `ê`. If I click `^` then `^` then wezterm emits
`^^`.
refs: #275
refs: #296
This appears to be an unexpected consequence of 6708ea4b36
but thankfully that change allows de-coupling shift processing
from the ctrl processing in this block of code.
refs: #275
It's not clear why the first choice isn't always the right choice
for some users.
This commit changes the logic to try all potential configs,
one after the other, until we find one that sticks.
I don't know if this will work in practice: I suspect that
trying to configure one of them may prevent later configs from
being used.
But maybe it will, and it may reveal more information about
what the real cause of the problem is.
refs: #272
This is imperfect in that it may feel slightly off for very large
or very small font sizes, but it feels more similar to the scroll
speed in eg: iTerm2 with these changes.
refs: #206
To reproduce the problem, maximize wezterm, then press CMD-N.
This commit tells the window not to use cocoa native tabs and
instead really create a new window when we ask it to create
a new window.
closes: #254
Split the font loading into two phases; first phase for non-fallback
fonts, second phase for fallback fonts.
This allows all potential sources to be searched for the preferred
fonts before populating the handles list with fallback fonts.
Previously we'd silently (well, we'd log to stderr) fall
back to the CPU renderer.
Let's instead pop up a config error window to make this
class of error more visible.
refs: #272
This commit teaches the config layer to distinguish between
explicitly configured fonts and automatic fallback fonts.
Font loading now maintains the set of loaded fonts. If after
loading from all configured sources a non-fallback font is
not present in the loaded set, wezterm will now pop up the
configuration error window to explain what is happening.
closes: #263
In this scenario:
```lua
local wezterm = require "wezterm"
return {
font_size = 12.0,
font_dirs = {"/home/wez/.fonts"},
font_locator = "ConfigDirsOnly",
font = wezterm.font_with_fallback({
-- this is an invalid font
"does not exist",
"Noto Color Emoji",
}),
}
```
we'd take the metrics from the emoji font and the cell size would
be crazy huge.
With this change we filter out "outliers" based on the approximate
pixel size for a font given its size and dpi. If a fallback position
is significantly larger or smaller than the theoretical size then
we skip it when considering the metrics.
The result of this is that with the above configuration we end up
with `{"Noto Color Emoji", "JetBrains Mono"}` as the font order;
most of the textual glyphs will render from `JetBrains Mono` but
the number glyphs prefer the `Noto Color Emoji` renditions which
are typically double width. While the terminal looks a bit
cartoonish as a result of that selection, the sizes are much more
reasonable compared to the screenshot in #263.
refs: #263
Moved the image and hyperlink portion of CellAttributes out
to a separate heap structure, saving 8 bytes per Cell
for the common case of no hyperlink and no image.
Replaces SmallVec with an internal TeenyString that only
occupies a single machine word and avoids heap allocation
in the common case on most architectures. This takes the
textual portion of Cell from 32 bytes to 8 bytes.
The nightly builds seem to often trip over each other when
uploading the source tarball from ubuntu20.
Restrict it to being built only on the appimage build (ubuntu16).
025732d00f introduced deferred
window creation; the creation would get scheduled into the
spawn queue and then get run again a few milliseconds later
on the main thread.
For reasons that I don't understand, returning to the scheduler
loop to flush or otherwise process messages causes a wayland
protocol error.
Adjusting the notify routine to dispatch immediately if we're
already on the mux thread seems to resolve this.
While looking at this, I cleaned up a destruction order issue
with the opengl state that was then causing a segfault on shutdown.
I also removed a bit of dead paint related code that doesn't
appear to be needed any more.
refs: #293
The mac builds started to fail with a crate resolution issue that I
can't reproduce locally shortly after I updated the cache action. Let's
tweak the cache key to see if that clears things up.
This will delay for the specified number of milliseconds.
This is an async function; it won't block the gui thread,
it will deschedule running the script and resume it once
the timeout has expired.
refs: #222
One of the updates in the past week made the reactor/async-io
stuff sensitive to the fork performed by daemonizing.
We can "simply" re-exec ourselves post-fork to resolve this.
