Problem:
Sometimes, when nvim sends the `win_viewport` event, for example when scrolling
with visible folds on the screen, it reports the `scroll_delta` value one batch
into "future". So when the client application is trying to show the new viewport
it's not yet updated, resulting in temporary corruption / screen flickering.
For more details see #23609, and starting from [this comment](
https://github.com/neovide/neovide/pull/1790#issuecomment-1518697747) in
https://github.com/neovide/neovide/pull/1790,, where the issue was first
detected. Note that some of the conclusions in those are not fully accurate, but
the general observations are.
Solution:
When there are pending updates to a Window, delay the `win_viewport` UI event
until the updates are sent. This ensures that there's no flush between sending
the viewport and updating of the lines corresponding to the new viewport.
Document the existing viewport behaviour (for cases where there are no
extra flushes), give a hint about how applications can deal with the slightly
surprising behaviour of the viewport event being sent after the updates.
Fixes https://github.com/neovim/neovim/issues/23609
Problem: nvim_buf_set_text(), nvim_open_term() and termopen() all change buffer
text, which is forbidden during textlock. Additionally, nvim_open_term() and
termopen() may be used to convert the cmdwin buffer into a terminal buffer,
which is weird.
Solution: Allow nvim_buf_set_text() and nvim_open_term() in the cmdwin, but
disallow nvim_open_term() from converting the cmdwin buffer into a terminal
buffer. termopen() is not allowed in the cmdwin (as it always operates on
curbuf), so just check text_locked().
Also happens to improve the error in #21055: nvim_buf_set_text() was callable
during textlock, but happened to check textlock indirectly via u_save();
however, this caused the error to be overwritten by an unhelpful "Failed to
save undo information" message when msg_list == NULL (e.g: an `<expr>` mapping
invoked outside of do_cmdline()).
Problem: some API functions that check textlock (usually those that can change
curwin or curbuf) can break the cmdwin.
Solution: make FUNC_API_CHECK_TEXTLOCK call text_locked() instead, which already
checks for textlock, cmdwin and `<expr>` status.
Add FUNC_API_TEXTLOCK_ALLOW_CMDWIN to allow such functions to be usable in the
cmdwin if they can work properly there; the opt-in nature of this attribute
should hopefully help mitigate future bugs.
Also fix a regression in #22634 that made functions checking textlock usable in
`<expr>` mappings, and rename FUNC_API_CHECK_TEXTLOCK to FUNC_API_TEXTLOCK.
Problem: Tabline highlight wrong after truncated double width label.
Solution: Fill up half a double width character later. (closesvim/vim#12614)
d392a74c5a
Problem:
nvim_parse_cmd() in pcall() may show an error message (side-effect):
:lua pcall(vim.api.nvim_parse_cmd, vim.fn.getcmdline(), {})
E16: Invalid range
Solution:
Avoid emsg() in the nvim_parse_cmd() codepath.
- refactor(api): add error message output parameter to get_address()
- fix: null check emsg() parameter
- refactor: remove emsg_off workaround from do_incsearch_highlighting()
- refactor: remove emsg_off workaround from cmdpreview_may_show()
- refactor: remove remaining calls to emsg() from parse_cmd_address() and get_address()
- (refactor): lint set_cmd_dflall_range()
- refactor: addr_error() - move output parameter to return value
Fix#20339
TODO:
These are the functions called by `get_address()`:
```
nvim_parse_cmd() -> parse_cmdline() -> parse_cmd_address() -> get_address()
skipwhite()
addr_error()
qf_get_cur_idx()
qf_get_cur_valid_idx()
qf_get_size()
qf_get_valid_size()
mark_get()
mark_check()
assert()
skip_regexp()
magic_isset()
> do_search()
> searchit()
ascii_isdigit()
getdigits()
getdigits_int32()
compute_buffer_local_count()
hasFolding()
```
From these functions, I found at least two that call emsg directly:
- do_search()
- seems to be simple to refactor
- searchit()
- will be more challenging because it may generate multiple error messages,
which can't be handled by the current `errormsg` out-parameter.
For example, it makes multiple calls to `vim_regexec_multi()` in a loop that
possibly generate error messages, and later `searchit()` itself may generate
another one:
- c194acbfc4/src/nvim/search.c (L631-L647)
- c194acbfc4/src/nvim/search.c (L939-L954)
---------
Co-authored-by: Justin M. Keyes <justinkz@gmail.com>
Problem:
`nvim -v` and `:version` prints system vimrc, fallback files, and compilation
info by default, which most people don't care about and just clutters up the
output.
Solution:
Omit extra info unless 'verbose' is set.
Use the actual width of the 'statuscolumn' to allocate and fill its click definition array.
The returned width of the built statuscolumn string may be shorter (and is padded later).
Problem:
`:lua vim.cmd.win_getid(30,10)` is interpreted as `:win[size] 30 10`.
User intention was to call `vim.fn.win_getid(30,10)`.
Solution:
Check that the `cmd` actually matches the resolved command.
Problem: Resetting local option to global value is inconsistent.
Solution: Handle "<" specifically for 'scrolloff' and 'sidescrolloff'.
(closesvim/vim#12594)
bf5f189e44
Co-authored-by: Bram Moolenaar <Bram@vim.org>
Problem:
Using "nvim -l args.lua" without passing extra script args, does not set `_G.arg[0]`.
Steps to reproduce:
```
cat > args.lua<<EOF
vim.print(_G.arg, '')
vim.print(vim.v.argv, '')
EOF
nvim --clean -l args.lua
```
Solution:
Fix condition in command_line_scan.
Problem: vimdoc parser requires space between column heading and `~`.
Solution: Add space to docs (and mention it). Also edit `luaref.txt`
headings for consistency.
Problem: Empty CmdlineEnter autocommand causes errors in Ex mode.
Solution: Save and restore ex_pressedreturn. (Christian Brabandt,
closes # 12581, closesvim/vim#12578)
590aae3557
Co-authored-by: Christian Brabandt <cb@256bit.org>
Problem: Error from term_start() not caught by try/catch.
Solution: save and restore did_emsg when applying autocommands. (Ozaki
Kiichi, closesvim/vim#9361)
c3f91c0648
Co-authored-by: ichizok <gclient.gaap@gmail.com>
Redrawing of 'statusline' and 'winbar' are actually already inhibited by
RedawingDisabled in Ex mode.
In Vim there is a check for `msg_scrolled == 0` (which is false in Ex
mode) since Vim doesn't have msgsep. Add a `!exmode_active` check here
in Nvim instead.
Enforce consistent terminology (defined in
`gen_help_html.lua:spell_dict`) for common misspellings.
This does not spellcheck English in general (perhaps a future TODO,
though it may be noisy).
Problem:
- `vim.json` exposes various global options which:
- affect all Nvim Lua plugins (especially the LSP client)
- are undocumented and untested
- can cause confusing problems such as: cc76ae3abe
- `vim.json` exposes redundant mechanisms:
- `vim.json.null` is redundant with `vim.NIL`.
- `array_mt` is redundant because Nvim uses a metatable
(`vim.empty_dict()`) for empty dict instead, which `vim.json` is
configured to use by default (see `as_empty_dict`).
Example:
```
:lua vim.print(vim.json.decode('{"bar":[],"foo":{}}'))
--> { bar = {}, foo = vim.empty_dict() }
```
Thus we don't need to also decorate empty arrays with `array_mt`.
Solution:
Remove the functions from the public vim.json interface.
Comment-out the implementation code to minimize drift from upstream.
TODO:
- Expose the options as arguments to `vim.json.new()`
Option related code uses `char *` for pointer to option value, which is not the best way of representing a type-agnostic pointer.
Solution: Make pointers to option value use `void *` instead.
