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Problem:
Only the stdio channel can "own" a server (self-exit on close). After
:restart the TUI reconnects over a socket, so the restarted server does
not have "self-exit" behavior when the channel closes (e.g. by UI
disconnect, host-terminal close, etc.), which leaves a dangling server.
Solution:
- Introduce `nvim_chan_set`. (`nvim_set_client_info` doesn't fit:
exposing it to Lua would require a `channel` param, which is not
backwards-compatible, plus it's awkward because it doesn't merge info.)
- Broadcast per-channel properties in the "restart" UI event as an
opaque dict (a potentially useful pattern for other UI-events in the
future).
- UIs are expected to restore the channel properties on restart.
- `nvim_get_chan_info()` reports "detach".
- Remove `nvim__chan_set_detach()`.
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Problem: Command inputs and parsed modifiers have different optional
fields, and completion window IDs are annotated as floating-point
values.
Solution: Separate modifier input and return types, correct integer IDs,
and update the metadata generators and their output.
AI-assisted
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The border metadata omitted the empty string and bold styles accepted by
the API. Include both literals and regenerate the Lua types so valid
window configurations pass type checking.
AI-assisted
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Problem:
There is no unified notion of a "user action".
Vim processes input by one-char-at-a-time, and mostly throws away any
hints it might gather about the user's action, with one exception: it
stores the last _edit_ action (the "redo buffer", encoded as
unstructured `["x][v][count]body` bytes).
Plugins can only observe individual keys (vim.on_key) and high-level
effects (TextChanged, CursorMoved).
Solution:
- Users can subscribe to `CmdAtom` events to handle any user action.
- Event is deferred; handlers cannot cancel or interfere with user
actions.
- Capture `CmdSpec` from the normal/insert/visual subsystems.
- typeahead/readahead stay unstructured (`buffheader_T`): they are key
streams, not commands.
- the redo/record buffers become `StringBuilder`: fewer
allocations/copies.
- Repurpose the input/redo engine to accept `CmdSpec` objects.
"atom": one repeatable unit of user input, as a resolved (post-mapping)
keysequence plus structured fields. Only user actions, not `:normal`,
API calls, or non-"t" `feedkeys`.
BREAKING: dot-repeat of an Insert session, replays the entire session
including cursor-moves (:help ins-repeat).
BREAKING: dot-repeat of a Visual operation, replays the selection
instead of operating on a fixed-size region.
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Problem: nvim_cmd() accepts number/boolean in args and converts them
to strings, but the keyset declares ArrayOf(String).
Solution: use ArrayOf(Union(Integer, String, Boolean)) and wrap union
types in parens when generating array annotations.
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Ref #6645
Problem:
When a window is resized it takes space from the window right/below first,
and only falls back to the window left/above when there is no more room.
Sometimes a user wants the space to come from a specific direction.
Solution:
Add nvim_win_resize(win, width, height, {anchor}) which resizes a window
with a choosable anchor edge, letting a window grow leftwards or upwards
by taking space from the window to the left or above first. The default
anchor reproduces nvim_win_set_width()/nvim_win_set_height().
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Problem:
Plugins using RPC sockets cannot detect when the peer closes a
`sockconnect()` channel, so reconnect logic has no reliable trigger.
Solution:
Add a `ChanClose` event with channel info before the channel is removed,
matching the existing `ChanOpen`/`ChanInfo` event model.
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Problem:
`nvim_set_option_value` cannot "update" options similar to `:set opt=`,
`:set opt+=`, etc. The Lua impls of "vim.opt" / "vim.o" have incomplete,
bespoke reimplementations of those operations.
ref #38420
Solution:
- Add `operation` param to `nvim_set_option_value`, which may be "set",
"append", "prepend", or "remove".
- Use this feature to implement `vim.opt` / `vim.o`.
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Problem:
No event triggered just before writing a session file.
Solution:
Add `SessionWritePre`.
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Problem: Extmark has support for horizontal scrolling and truncating, but not wrapping.
Solution: Extend virt_lines_overflow flags to support "wrap" and "auto" based on proposed changes in #18282.
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Problem:
No way to handle a "tab moved" event.
Use-case: tabline plugins may cache tab labels, and need to know when to
invalidate their cache.
Solution:
Add a `TabMoved` event that triggers whenever tabs are reordered via `:tabmove`
or via mouse click-and-drag.
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Problem:
API clients cannot query the tab-local value of 'cmdheight'.
Solution:
Allow nvim_get_option_value() to accept { tab = <tab-ID> } for 'cmdheight'.
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Problem: No way to hook into put commands
(yochem)
Solution: Introduce TextPutPre and TextPutPost autocommands
(Foxe Chen).
fixes: vim/vim#18701
closes: vim/vim#20144
https://github.com/vim/vim/commit/e0781bd5bfd1acc2c4d5d01ec60fecafc99ee3e2
Co-authored-by: Foxe Chen <chen.foxe@gmail.com>
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Problem:
BufModifiedSet autocmd only triggered for current buffer during
redraw, causing delayed events when :wa writes non-current buffers.
Solution:
- Use the aucmd_defer approach to implement `Optionset modified`.
- Drop BufModifiedSet.
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Problem:
Cannot remove a `@conceal` highlight when defined in highlights.scm.
Solution:
Support a `@noconceal` highlight that works similarly to `@nospell` where it
overrides the conceal set on the range to remove it. Additionally, can
set the conceal metadata field to false for the same behavior.
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Problem:
- Not obvious which _meta/ are generated and which should be edited
manually.
- The require guard (`error('Cannot require a meta file')`) is not
consistently present in all meta files.
Solution:
- Update headers.
- Add require() guard to all meta files.
- Rename generated meta files with `.gen.lua`.
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