Our current virtual text implementation for vim emulates it by abusing
the textprop and popupwin feature from vim 8.2 (for more details see
commit 708e810414).
This implementation sometimes is janky, for example the popups may leak
into other vim windows next to the current window.
Luckily, vim just got native virtual-text support as a proper subtype to
the prop_add() function. By using the 'text' option, the text property
automatically becomes virtual text that is appended to the current line
if col is zero.
Note that the prop_add() method now returns negative IDs for virtual
text properties.
This feature was added in vim 9.0.0067, but it got a lot of bugfixes
which is why we only use this new API if vim has at least version
9.0.0214.
However, there are still some minor bugs with vim's native virtual text,
so we might have to bump the version check again in the future.
Also see #3906.
Now with proper virtual text support for both vim and neovim available,
we can tackle #2962 in the future by simply tracking multiple virt-texts
instead of just the last one.
In the future we might also want to disable our virtual text emulation
support for vim, as it is a total hack, but for now we should keep it
for backwards compatibility.
If virtualtext.vim is autoloaded first, it will link
ALEVirtualTextWarning to ALEWarning. But ALEWarning is not initialized
yet, so it will create ALEWarning, but with no color definition set.
Shortly after, highlight.vim is autoloaded, which would usually link
ALEWarning to SpellCap, but only if ALEWarning is not already set.
However since ALEWarning is already initialized due to the previous
link, we skip this and never actually come around to properly
initializing it.
We fix this by initializing all highlight groups in highlight.vim, thus
satisfying the dependency of ALEVirtualTextWarning being initialized
after ALEWarning.
Fixes#3585
Before this patch multiline warnings would appear in a single line with
'^@' as separator.
Now we use whitespace as separator to improve the appearance.
Also strip trailing whitespace, newlines, etc...
Fixes#3939
Magnus Groß
Jethro Shuwen Sun
w0rp
w0rp
Björn Linse
jamestthompson3
Luan Santos