When lsp-mode is active, it tries to ensure it's own
lsp-completion-at-point function is listed before any other functions in
completion-at-point-functions.
This however prevents completions for yasnippet snippets and
files/folders from working, as completion never moved on beyond
lsp-completion-at-point. Previously I had managed to fix this by using
the DEPTH option of add-hook to get siren-yasnippet-capf and cape-file
to run before lsp-completion-at-point.
But it seems lsp-mode has changed from using add-hook to a more custom
method of always ensuring lsp-completion-at-point is always first on the
list. Hence we need to the same using the new siren-prepend macro I
recently added.
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.
This applies especially in lsp-mode. Yasnippet snippets now show as
completion candidates if the word at point exactly matches a snippet
keyword, otherwise it'll fallback to normal lsp backed completion.
And it also supports completing file/directory names now too while
lsp-mode is active.
All this is done by modifying completion-at-point-functions after
lsp-mode has done it's trickery with it. Along with a dirty hack to
company-yasnippet to make it only activate on exact matches. Without
this hack, lsp backed completion rarely activates as snippets would have
higher priority if there's any partial matches.
Personally I find orderless is giving me better results than prescient
when fuzzy/flex matching is enabled. Hence the switch to orderless.
I also split the modules apart to ensure, that selectrum, vertico,
prescient and orderless can be mixed and matched however and work
correctly.
And the switch from to vertico from selectrum is mostly cause I like
it's wraparound/cycle feature, where end/beginning of the candidate list
will wrap around.
I'm not fully convinced with swapping out ido with selectrum, so I'll
add the configuration for both, without actually loading them, and
instead manually try them out from time to time.
Also, make ivy use prescient for filtering and sorting, as it does a
much better job than ivy itself does by default. But nothing currently
uses ivy either, so it's more for future if I start using ivy somewhere.
There are a few major modes which are not based on prog-mode, that I
want to behave like prog-mode. Previously each did nearly all the same
setup that's done via the prog-mode hooks. Now instead let's actually
run runs the hooks for prog-mode.
The original code to fix the incompatibility didn't see to work anymore,
so refactored it a bit to so it goes about things a bit more carefully,
and that seemed to fix it.
