Check for differing neovim versions with different APIs for LSP.
Fixes#2324
Consists of two tests:
1. Before extension load, test if this is neovim and whether this neovim
supports LSP
2. When getting diagnostic counts, test whether a language server is
attached to the current buffer
closes#2324
Note: seems like one needs to call v:lua.vim.lsp.buf_get_clients() and
even then some older neovims do not understand that. So wrap it around
an exists() call and hope this works for all neovims.
nvimlsp removed the :LspInstallInfo command. So instead check explicitly
for neovim for enabling the nvimlsp extension.
In the extension itself check that at least one LSP is attached to the
buffer before returning warning and error messages.
closes#2323
Fix: a literal '0' appears after filename on older versions of vim-lsp.
0c8164b1b3 added support for showing lsp
progress, but didn't always explicitly return a value. Vim uses 0 as a
return value when none are supplied, so when used with an older version
of vim-lsp that doesn't have the progress feature a 0 appeared in the
statusline.
Included `.vue` extension to jsformatter for supporting Vue.js files. Vue files follows the same path resolution as js files: https://vue-loader.vuejs.org/spec.html#src-imports
Case sensitive comparison for jsformatter
closes#2314#2154
Add a leading space before the searchcount statistics. Note, that this
uses a non-breaking space, because it looks like Vim is stripping aways
leading space characters (see vim/vim#1431)
This is needed for Neovim, because an external UI could be attached to
the same neovim server, so it does not make sense to define highlighting
groups with either only the cterm or the guifg attribute set.
So refactor the code slightly got get rid of this variable (and since
this variable is not needed anymore, we can also get rid of the guienter
and OptionSet autocommand).
fixes: #2261
Now it can be configured to show only when localsearch is disabled. It
is useful if you mostly keep localsearch enabled and don't want to keep
seeing the extra 'LS' section, but still want to have some kind of a
visual indication about when localsearch is disabled.
This improves the term extension in a few ways.
First it fixes some vint warnings about case sensitive comparisons.
Next it makes the active and inactive variants consistent, as well as
making the line number display consistent to other buffer types. This
was one of the main reasons to do this, because the inclusion of the
Neoterm ID in a previous pull request made inactive terminal status
lines look really inconsistent compared to the active ones.
Further this now shows the Neoterm ID in both active and inactive
buffers in Airline section B. It also removes the now redundant
Neoterm IDs from the buffer name in both Neovim and Vim.
Finally the cosmetic buffer name is now used for both active and
inactive variants.
This was causing persistent errors when you run, for example,
```
ls | nvim -c 'setf dirvish'
```
as dirvish will not yet have set that local variable yet airline will
attempt to use it.
