It turns out that using the 'character mode causes very noticeable
performance degradation and straight up lag when typing in a lot of
programming languages. Setting it back to 'column seems to resolved this
for me.
Simply render indent guides identical for all levels. Specifically
highlighting the current indent line makes things feel a bit "noisy",
and also doesn't always respond to changes that fast, making things feel
slow too.
Turns out the conflicts with both copilot and highlight-indent-guide was
due to the newline-mark. Hence disable newline-mark and re-enable
whitespace mode.
As I'm no longer using whitespace-mode in prog-mode derived modes, the
cursor movement bug affecting highlight-indent-guides when
whitespace-mode is enabled is no longer an issue for me.
Further details about the highlight-indent-guides conflict with
whitespace-mode is available in this issue:
https://github.com/DarthFennec/highlight-indent-guides/issues/107
When whitespace-mode is enabled, single-line copilot completions makes
the cursor look like it's at the end of the completion rather than in
it's real position.
Issue with gifs showing the behavior is here:
https://github.com/zerolfx/copilot.el/issues/28
For the most part I should be able to live without whitespace-mode in
day to day use, and improvements to the highlight-indent-guides setup
should help.
And worst case, whitespace-mode can always be toggled easily enough.
Turns out undo-tree massively increases undo limits, and the defaults
seem to cut off history for me much sooner than I'd like. So I set the
limits to the same high values are undo-tree does.
Use fussy instead of orderless for filtering and scoring/ordering
completion candidates. This seems to overall order results in a much
better way than just orderless.
Technically orderless is still used to filter the candidate list, but
fzf-native is used to score/order the results.
It seems to have recently been changed to default to the same face as
comments, which I really do not like. Inheriting from
font-lock-keyword-face seems fine though.
Syntax highlighting within code blocks is nice, but it doesn't always
play that nice, and messes up the syntax highlighting of the rest of the
file quite often.
Previously we only hide company-mode's in-line preview when there was
only a single result. This meant that it didn't show the one result
anywhere.
This allows company-mode to still show it's regular popup even when
there's only one result.
I opted for accepting copilot completions using C-<tab> /
<backtab> (shift+tab) instead of regular tab, as it was often getting in
the way of yasnippet and lsp completion suggestions. This allows a more
explicit acceptance of Copilot suggestions.
Due to how lsp integrates with flycheck, it needs to take over all
linting responsibilities.
Hence we need to use efm-langserver to execute shellcheck for us. It's a
bit messy, but end result works pretty well.
Also replace undohist with undo-fu-session.
Overall this seems to yield a more reliable undo history, as undo-fu and
vundo supposedly operate with vanilla emacs undo history state, while
undo-tree supposedly does some custom tweaks to the undo state.
Move away from the whitespace-cleanup-mode package, and instead simply
define our own whitespace-cleanup-on-save-mode minor-mode that uses a
before-save-hook.
