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56b7a18995
neovim/runtime/doc/api.txt
Justin M. Keyes aec4938a21
feat(api): broadcast events to ALL channels #28487 
Problem:
`vim.rpcnotify(0)` and `rpcnotify(0)` are documented as follows:

    If {channel} is 0, the event is broadcast to all channels.

But that's not actually true. Channels must call `nvim_subscribe` to
receive "broadcast" events, so it's actually "multicast".

- Assuming there is a use-case for "broadcast", the current model adds
  an extra step for broadcasting: all channels need to "subscribe".
- The presence of `nvim_subscribe` is a source of confusion for users,
  because its name implies something more generally useful than what it
  does.

Presumably the use-case of `nvim_subscribe` is to avoid "noise" on RPC
channels not expected a broadcast notification, and potentially an error
if the channel client reports an unknown event.

Solution:
- Deprecate `nvim_subscribe`/`nvim_unsubscribe`.
  - If applications want to multicast, they can keep their own multicast
    list. Or they can use `nvim_list_chans()` and `nvim_get_chan_info()`
    to enumerate and filter the clients they want to target.
- Always send "broadcast" events to ALL channels. Don't require channels
  to "subscribe" to receive broadcasts. This matches the documented
  behavior of `rpcnotify()`.
2024-05-17 07:37:39 -07:00

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*api.txt* Nvim
NVIM REFERENCE MANUAL by Thiago de Arruda
Nvim API *API* *api*
Nvim exposes a powerful API that can be used by plugins and external processes
via |RPC|, |Lua| and Vimscript (|eval-api|).
Applications can also embed libnvim to work with the C API directly.
Type |gO| to see the table of contents.
==============================================================================
API Usage *api-rpc* *RPC* *rpc*
*msgpack-rpc*
RPC is the main way to control Nvim programmatically. Nvim implements the
MessagePack-RPC protocol with these extra (out-of-spec) constraints:
1. Responses must be given in reverse order of requests (like "unwinding
a stack").
2. Nvim processes all messages (requests and notifications) in the order they
are received.
MessagePack-RPC specification:
https://github.com/msgpack-rpc/msgpack-rpc/blob/master/spec.md
https://github.com/msgpack/msgpack/blob/0b8f5ac/spec.md
Many clients use the API: user interfaces (GUIs), remote plugins, scripts like
"nvr" (https://github.com/mhinz/neovim-remote). Even Nvim itself can control
other Nvim instances. API clients can:
- Call any API function
- Listen for events
- Receive remote calls from Nvim
The RPC API is like a more powerful version of Vim's "clientserver" feature.
CONNECTING *rpc-connecting*
See |channel-intro| for various ways to open a channel. Channel-opening
functions take an `rpc` key in the options dictionary. RPC channels can also
be opened by other processes connecting to TCP/IP sockets or named pipes
listened to by Nvim.
Nvim creates a default RPC socket at |startup|, given by |v:servername|. To
start with a TCP/IP socket instead, use |--listen| with a TCP-style address: >
nvim --listen 127.0.0.1:6666
More endpoints can be started with |serverstart()|.
Note that localhost TCP sockets are generally less secure than named pipes,
and can lead to vulnerabilities like remote code execution.
Connecting to the socket is the easiest way a programmer can test the API,
which can be done through any msgpack-rpc client library or full-featured
|api-client|. Here's a Ruby script that prints "hello world!" in the current
Nvim instance:
>ruby
#!/usr/bin/env ruby
# Requires msgpack-rpc: gem install msgpack-rpc
#
# To run this script, execute it from a running Nvim instance (notice the
# trailing '&' which is required since Nvim won't process events while
# running a blocking command):
#
# :!./hello.rb &
#
# Or from another shell by setting NVIM_LISTEN_ADDRESS:
# $ NVIM_LISTEN_ADDRESS=[address] ./hello.rb
require 'msgpack/rpc'
require 'msgpack/rpc/transport/unix'
nvim = MessagePack::RPC::Client.new(MessagePack::RPC::UNIXTransport.new, ENV['NVIM_LISTEN_ADDRESS'])
result = nvim.call(:nvim_command, 'echo "hello world!"')
<
A better way is to use the Python REPL with the "pynvim" package, where API
functions can be called interactively:
>
>>> from pynvim import attach
>>> nvim = attach('socket', path='[address]')
>>> nvim.command('echo "hello world!"')
<
You can also embed Nvim via |jobstart()|, and communicate using |rpcrequest()|
and |rpcnotify()|:
>vim
let nvim = jobstart(['nvim', '--embed'], {'rpc': v:true})
echo rpcrequest(nvim, 'nvim_eval', '"Hello " . "world!"')
call jobstop(nvim)
<
==============================================================================
API Definitions *api-definitions*
*api-types*
The Nvim C API defines custom types for all function parameters. Some are just
typedefs around C99 standard types, others are Nvim-defined data structures.
Basic types ~
>
API Type C type
------------------------------------------------------------------------
Nil
Boolean bool
Integer (signed 64-bit integer) int64_t
Float (IEEE 754 double precision) double
String {char* data, size_t size} struct
Array
Dictionary (msgpack: map)
Object
<
Note:
- Empty Array is accepted as a valid Dictionary parameter.
- Functions cannot cross RPC boundaries. But API functions (e.g.
|nvim_create_autocmd()|) may support Lua function parameters for non-RPC
invocations.
Special types (msgpack EXT) ~
These are integer typedefs discriminated as separate Object subtypes. They
can be treated as opaque integers, but are mutually incompatible: Buffer may
be passed as an integer but not as Window or Tabpage.
The EXT object data is the (integer) object handle. The EXT type codes given
in the |api-metadata| `types` key are stable: they will not change and are
thus forward-compatible.
>
EXT Type C type Data
------------------------------------------------------------------------
Buffer enum value kObjectTypeBuffer |bufnr()|
Window enum value kObjectTypeWindow |window-ID|
Tabpage enum value kObjectTypeTabpage internal handle
<
*api-indexing*
Most of the API uses 0-based indices, and ranges are end-exclusive. For the
end of a range, -1 denotes the last line/column.
Exception: the following API functions use "mark-like" indexing (1-based
lines, 0-based columns):
- |nvim_get_mark()|
- |nvim_buf_get_mark()|
- |nvim_buf_set_mark()|
- |nvim_win_get_cursor()|
- |nvim_win_set_cursor()|
Exception: the following API functions use |extmarks| indexing (0-based
indices, end-inclusive):
- |nvim_buf_del_extmark()|
- |nvim_buf_get_extmark_by_id()|
- |nvim_buf_get_extmarks()|
- |nvim_buf_set_extmark()|
*api-fast*
Most API functions are "deferred": they are queued on the main loop and
processed sequentially with normal input. So if the editor is waiting for
user input in a "modal" fashion (e.g. the |hit-enter-prompt|), the request
will block. Non-deferred (fast) functions such as |nvim_get_mode()| and
|nvim_input()| are served immediately (i.e. without waiting in the input
queue). Lua code can use |vim.in_fast_event()| to detect a fast context.
==============================================================================
API metadata *api-metadata*
The Nvim C API is automatically exposed to RPC by the build system, which
parses headers in src/nvim/api/* and generates dispatch-functions mapping RPC
API method names to public C API functions, converting/validating arguments
and return values.
Nvim exposes its API metadata as a Dictionary with these items:
- version Nvim version, API level/compatibility
- version.api_level API version integer *api-level*
- version.api_compatible API is backwards-compatible with this level
- version.api_prerelease Declares the API as unstable/unreleased
`(version.api_prerelease && fn.since == version.api_level)`
- functions API function signatures, containing |api-types| info
describing the return value and parameters.
- ui_events |UI| event signatures
- ui_options Supported |ui-option|s
- {fn}.since API level where function {fn} was introduced
- {fn}.deprecated_since API level where function {fn} was deprecated
- types Custom handle types defined by Nvim
- error_types Possible error types returned by API functions
About the `functions` map:
- Container types may be decorated with type/size constraints, e.g.
ArrayOf(Buffer) or ArrayOf(Integer, 2).
- Functions considered to be methods that operate on instances of Nvim
special types (msgpack EXT) have the "method=true" flag. The receiver type
is that of the first argument. Method names are prefixed with `nvim_` plus
a type name, e.g. `nvim_buf_get_lines` is the `get_lines` method of
a Buffer instance. |dev-api|
- Global functions have the "method=false" flag and are prefixed with just
`nvim_`, e.g. `nvim_list_bufs`.
*api-mapping*
External programs (clients) can use the metadata to discover the API, using
any of these approaches:
1. Connect to a running Nvim instance and call |nvim_get_api_info()| via
msgpack-RPC. This is best for clients written in dynamic languages which
can define functions at runtime.
2. Start Nvim with |--api-info|. Useful for statically-compiled clients.
Example (requires Python "pyyaml" and "msgpack-python" modules): >
nvim --api-info | python -c 'import msgpack, sys, yaml; yaml.dump(msgpack.unpackb(sys.stdin.buffer.read()), sys.stdout)'
<
3. Use the |api_info()| Vimscript function. >vim
:lua vim.print(vim.fn.api_info())
< Example using |filter()| to exclude non-deprecated API functions: >vim
:new|put =map(filter(api_info().functions, '!has_key(v:val,''deprecated_since'')'), 'v:val.name')
==============================================================================
API contract *api-contract*
The Nvim API is composed of functions and events.
- Clients call functions like those described at |api-global|.
- Clients can subscribe to |ui-events|, |api-buffer-updates|, etc.
- API function names are prefixed with "nvim_".
- API event names are prefixed with "nvim_" and suffixed with "_event".
As Nvim evolves the API may change in compliance with this CONTRACT:
- New functions and events may be added.
- Any such extensions are OPTIONAL: old clients may ignore them.
- Function signatures will NOT CHANGE (after release).
- Functions introduced in the development (unreleased) version MAY CHANGE.
(Clients can dynamically check `api_prerelease`, etc. |api-metadata|)
- Event parameters will not be removed or reordered (after release).
- Events may be EXTENDED: new parameters may be added.
- New items may be ADDED to map/list parameters/results of functions and
events.
- Any such new items are OPTIONAL: old clients may ignore them.
- Existing items will not be removed (after release).
- Deprecated functions will not be removed until Nvim version 2.0
"Private" interfaces are NOT covered by this contract:
- Undocumented (not in :help) functions or events of any kind
- nvim__x ("double underscore") functions
The idea is "versionless evolution", in the words of Rich Hickey:
- Relaxing a requirement should be a compatible change.
- Strengthening a promise should be a compatible change.
==============================================================================
Global events *api-global-events*
When a client invokes an API request as an async notification, it is not
possible for Nvim to send an error response. Instead, in case of error, the
following notification will be sent to the client:
*nvim_error_event*
nvim_error_event[{type}, {message}]
{type} is a numeric id as defined by `api_info().error_types`, and {message} is
a string with the error message.
==============================================================================
Buffer update events *api-buffer-updates*
API clients can "attach" to Nvim buffers to subscribe to buffer update events.
This is similar to |TextChanged| but more powerful and granular.
Call |nvim_buf_attach()| to receive these events on the channel:
*nvim_buf_lines_event*
nvim_buf_lines_event[{buf}, {changedtick}, {firstline}, {lastline}, {linedata}, {more}]
When the buffer text between {firstline} and {lastline} (end-exclusive,
zero-indexed) were changed to the new text in the {linedata} list. The
granularity is a line, i.e. if a single character is changed in the
editor, the entire line is sent.
When {changedtick} is |v:null| this means the screen lines (display)
changed but not the buffer contents. {linedata} contains the changed
screen lines. This happens when 'inccommand' shows a buffer preview.
Properties: ~
{buf} API buffer handle (buffer number)
{changedtick} value of |b:changedtick| for the buffer. If you send an
API command back to nvim you can check the value of |b:changedtick| as
part of your request to ensure that no other changes have been made.
{firstline} integer line number of the first line that was replaced.
Zero-indexed: if line 1 was replaced then {firstline} will be 0, not
1. {firstline} is always less than or equal to the number of lines
that were in the buffer before the lines were replaced.
{lastline} integer line number of the first line that was not replaced
(i.e. the range {firstline}, {lastline} is end-exclusive).
Zero-indexed: if line numbers 2 to 5 were replaced, this will be 5
instead of 6. {lastline} is always be less than or equal to the number
of lines that were in the buffer before the lines were replaced.
{lastline} will be -1 if the event is part of the initial update after
attaching.
{linedata} list of strings containing the contents of the new buffer
lines. Newline characters are omitted; empty lines are sent as empty
strings.
{more} boolean, true for a "multipart" change notification: the
current change was chunked into multiple |nvim_buf_lines_event|
notifications (e.g. because it was too big).
nvim_buf_changedtick_event[{buf}, {changedtick}] *nvim_buf_changedtick_event*
When |b:changedtick| was incremented but no text was changed. Relevant for
undo/redo.
Properties: ~
{buf} API buffer handle (buffer number)
{changedtick} new value of |b:changedtick| for the buffer
nvim_buf_detach_event[{buf}] *nvim_buf_detach_event*
When buffer is detached (i.e. updates are disabled). Triggered explicitly by
|nvim_buf_detach()| or implicitly in these cases:
- Buffer was |abandon|ed and 'hidden' is not set.
- Buffer was reloaded, e.g. with |:edit| or an external change triggered
|:checktime| or 'autoread'.
- Generally: whenever the buffer contents are unloaded from memory.
Properties: ~
{buf} API buffer handle (buffer number)
EXAMPLE ~
Calling |nvim_buf_attach()| with send_buffer=true on an empty buffer, emits: >
nvim_buf_lines_event[{buf}, {changedtick}, 0, -1, [""], v:false]
User adds two lines to the buffer, emits: >
nvim_buf_lines_event[{buf}, {changedtick}, 0, 0, ["line1", "line2"], v:false]
User moves to a line containing the text "Hello world" and inserts "!", emits: >
nvim_buf_lines_event[{buf}, {changedtick}, {linenr}, {linenr} + 1,
["Hello world!"], v:false]
User moves to line 3 and deletes 20 lines using "20dd", emits: >
nvim_buf_lines_event[{buf}, {changedtick}, 2, 22, [], v:false]
User selects lines 3-5 using |linewise-visual| mode and then types "p" to
paste a block of 6 lines, emits: >
nvim_buf_lines_event[{buf}, {changedtick}, 2, 5,
['pasted line 1', 'pasted line 2', 'pasted line 3', 'pasted line 4',
'pasted line 5', 'pasted line 6'],
v:false
]
User reloads the buffer with ":edit", emits: >
nvim_buf_detach_event[{buf}]
<
LUA ~
*api-buffer-updates-lua*
In-process Lua plugins can receive buffer updates in the form of Lua
callbacks. These callbacks are called frequently in various contexts;
|textlock| prevents changing buffer contents and window layout (use
|vim.schedule()| to defer such operations to the main loop instead).
Moving the cursor is allowed, but it is restored afterwards.
|nvim_buf_attach()| will take keyword args for the callbacks. "on_lines" will
receive parameters ("lines", {buf}, {changedtick}, {firstline}, {lastline},
{new_lastline}, {old_byte_size} [, {old_utf32_size}, {old_utf16_size}]).
Unlike remote channel events the text contents are not passed. The new text can
be accessed inside the callback as >lua
vim.api.nvim_buf_get_lines(buf, firstline, new_lastline, true)
<
{old_byte_size} is the total size of the replaced region {firstline} to
{lastline} in bytes, including the final newline after {lastline}. if
`utf_sizes` is set to true in |nvim_buf_attach()| keyword args, then the
UTF-32 and UTF-16 sizes of the deleted region is also passed as additional
arguments {old_utf32_size} and {old_utf16_size}.
"on_changedtick" is invoked when |b:changedtick| was incremented but no text
was changed. The parameters received are ("changedtick", {buf}, {changedtick}).
*api-lua-detach*
In-process Lua callbacks can detach by returning `true`. This will detach all
callbacks attached with the same |nvim_buf_attach()| call.
==============================================================================
Buffer highlighting *api-highlights*
Nvim allows plugins to add position-based highlights to buffers. This is
similar to |matchaddpos()| but with some key differences. The added highlights
are associated with a buffer and adapts to line insertions and deletions,
similar to signs. It is also possible to manage a set of highlights as a group
and delete or replace all at once.
The intended use case are linter or semantic highlighter plugins that monitor
a buffer for changes, and in the background compute highlights to the buffer.
Another use case are plugins that show output in an append-only buffer, and
want to add highlights to the outputs. Highlight data cannot be preserved
on writing and loading a buffer to file, nor in undo/redo cycles.
Highlights are registered using the |nvim_buf_add_highlight()| function. If an
external highlighter plugin wants to add many highlights in a batch,
performance can be improved by calling |nvim_buf_add_highlight()| as an
asynchronous notification, after first (synchronously) requesting a source id.
|nvim_buf_add_highlight()| adds highlights as |extmarks|. If highlights need to
be tracked or manipulated after adding them, it is better to use
|nvim_buf_set_extmark()| directly, as this function returns the placed |extmark|
id. Thus, instead of >lua
vim.api.nvim_buf_add_highlight(buf, ns_id, hl_group, line, col_start, col_end)
<
use >lua
-- create the highlight through an extmark
extid = vim.api.nvim_buf_set_extmark(buf, ns_id, line, col_start, {end_col = col_end, hl_group = hl_group})
-- example: modify the extmark's highlight group
vim.api.nvim_buf_set_extmark(buf, ns_id, line, col_start, {end_col = col_end, hl_group = NEW_HL_GROUP, id = extid})
-- example: change the highlight's position
vim.api.nvim_buf_set_extmark(buf, ns_id, NEW_LINE, col_start, {end_col = col_end, hl_group = NEW_HL_GROUP, id = extid})
<
Example using the Python API client (|pynvim|):
>python
src = vim.new_highlight_source()
buf = vim.current.buffer
for i in range(5):
buf.add_highlight("String",i,0,-1,src_id=src)
# some time later ...
buf.clear_namespace(src)
<
If the highlights don't need to be deleted or updated, just pass -1 as
src_id (this is the default in python). Use |nvim_buf_clear_namespace()| to
clear highlights from a specific source, in a specific line range or the
entire buffer by passing in the line range 0, -1 (the latter is the default in
python as used above).
Example using the API from Vimscript: >vim
call nvim_buf_set_lines(0, 0, 0, v:true, ["test text"])
let src = nvim_buf_add_highlight(0, 0, "String", 1, 0, 4)
call nvim_buf_add_highlight(0, src, "Identifier", 0, 5, -1)
" some time later ...
call nvim_buf_clear_namespace(0, src, 0, -1)
==============================================================================
Floating windows *api-floatwin*
Floating windows ("floats") are displayed on top of normal windows. This is
useful to implement simple widgets, such as tooltips displayed next to the
cursor. Floats are fully functional windows supporting user editing, common
|api-window| calls, and most window options (except 'statusline').
Two ways to create a floating window:
- |nvim_open_win()| creates a new window (needs a buffer, see |nvim_create_buf()|)
- |nvim_win_set_config()| reconfigures a normal window into a float
To close it use |nvim_win_close()| or a command such as |:close|.
To check whether a window is floating, check whether the `relative` option in
its config is non-empty: >lua
if vim.api.nvim_win_get_config(window_id).relative ~= '' then
-- window with this window_id is floating
end
<
Buffer text can be highlighted by typical mechanisms (syntax highlighting,
|api-highlights|). The |hl-NormalFloat| group highlights normal text;
'winhighlight' can be used as usual to override groups locally. Floats inherit
options from the current window; specify `style=minimal` in |nvim_open_win()|
to disable various visual features such as the 'number' column.
Other highlight groups specific to floating windows:
- |hl-FloatBorder| for window's border
- |hl-FloatTitle| for window's title
- |hl-FloatFooter| for window's footer
Currently, floating windows don't support some widgets like scrollbar.
The output of |:mksession| does not include commands for restoring floating
windows.
Example: create a float with scratch buffer: >vim
let buf = nvim_create_buf(v:false, v:true)
call nvim_buf_set_lines(buf, 0, -1, v:true, ["test", "text"])
let opts = {'relative': 'cursor', 'width': 10, 'height': 2, 'col': 0,
\ 'row': 1, 'anchor': 'NW', 'style': 'minimal'}
let win = nvim_open_win(buf, 0, opts)
" optional: change highlight, otherwise Pmenu is used
call nvim_set_option_value('winhl', 'Normal:MyHighlight', {'win': win})
<
==============================================================================
Extended marks *api-extended-marks* *extmarks* *extmark*
Extended marks (extmarks) represent buffer annotations that track text changes
in the buffer. They can represent cursors, folds, misspelled words, anything
that needs to track a logical location in the buffer over time. |api-indexing|
Extmark position works like a "vertical bar" cursor: it exists between
characters. Thus, the maximum extmark index on a line is 1 more than the
character index: >
f o o b a r line contents
0 1 2 3 4 5 character positions (0-based)
0 1 2 3 4 5 6 extmark positions (0-based)
Extmarks have "forward gravity": if you place the cursor directly on an
extmark position and enter some text, the extmark migrates forward. >
f o o|b a r line (| = cursor)
3 extmark
f o o z|b a r line (| = cursor)
4 extmark (after typing "z")
If an extmark is on the last index of a line and you input a newline at that
point, the extmark will accordingly migrate to the next line: >
f o o z b a r| line (| = cursor)
7 extmark
f o o z b a r first line
extmarks (none present)
| second line (| = cursor)
0 extmark (after typing <CR>)
Example:
Let's set an extmark at the first row (row=0) and third column (column=2).
|api-indexing| Passing id=0 creates a new mark and returns the id: >
01 2345678
0 ex|ample..
^ extmark position
<
>vim
let g:mark_ns = nvim_create_namespace('myplugin')
let g:mark_id = nvim_buf_set_extmark(0, g:mark_ns, 0, 2, {})
<
We can get the mark by its id: >vim
echo nvim_buf_get_extmark_by_id(0, g:mark_ns, g:mark_id, {})
" => [0, 2]
We can get all marks in a buffer by |namespace| (or by a range): >vim
echo nvim_buf_get_extmarks(0, g:mark_ns, 0, -1, {})
" => [[1, 0, 2]]
Deleting all surrounding text does NOT remove an extmark! To remove extmarks
use |nvim_buf_del_extmark()|. Deleting "x" in our example: >
0 12345678
0 e|ample..
^ extmark position
<
>vim
echo nvim_buf_get_extmark_by_id(0, g:mark_ns, g:mark_id, {})
" => [0, 1]
<
Note: Extmark "gravity" decides how it will shift after a text edit.
See |nvim_buf_set_extmark()|
Namespaces allow any plugin to manage only its own extmarks, ignoring those
created by another plugin.
Extmark positions changed by an edit will be restored on undo/redo. Creating
and deleting extmarks is not a buffer change, thus new undo states are not
created for extmark changes.
==============================================================================
Global Functions *api-global*
nvim_chan_send({chan}, {data}) *nvim_chan_send()*
Send data to channel `id`. For a job, it writes it to the stdin of the
process. For the stdio channel |channel-stdio|, it writes to Nvim's
stdout. For an internal terminal instance (|nvim_open_term()|) it writes
directly to terminal output. See |channel-bytes| for more information.
This function writes raw data, not RPC messages. If the channel was
created with `rpc=true` then the channel expects RPC messages, use
|vim.rpcnotify()| and |vim.rpcrequest()| instead.
Attributes: ~
|RPC| only
Lua |vim.api| only
Parameters: ~
• {chan} id of the channel
• {data} data to write. 8-bit clean: can contain NUL bytes.
nvim_create_buf({listed}, {scratch}) *nvim_create_buf()*
Creates a new, empty, unnamed buffer.
Parameters: ~
• {listed} Sets 'buflisted'
• {scratch} Creates a "throwaway" |scratch-buffer| for temporary work
(always 'nomodified'). Also sets 'nomodeline' on the
buffer.
Return: ~
Buffer handle, or 0 on error
See also: ~
• buf_open_scratch
nvim_del_current_line() *nvim_del_current_line()*
Deletes the current line.
Attributes: ~
not allowed when |textlock| is active
nvim_del_keymap({mode}, {lhs}) *nvim_del_keymap()*
Unmaps a global |mapping| for the given mode.
To unmap a buffer-local mapping, use |nvim_buf_del_keymap()|.
See also: ~
• |nvim_set_keymap()|
nvim_del_mark({name}) *nvim_del_mark()*
Deletes an uppercase/file named mark. See |mark-motions|.
Note: ~
• Lowercase name (or other buffer-local mark) is an error.
Parameters: ~
• {name} Mark name
Return: ~
true if the mark was deleted, else false.
See also: ~
• |nvim_buf_del_mark()|
• |nvim_get_mark()|
nvim_del_var({name}) *nvim_del_var()*
Removes a global (g:) variable.
Parameters: ~
• {name} Variable name
nvim_echo({chunks}, {history}, {opts}) *nvim_echo()*
Echo a message.
Parameters: ~
• {chunks} A list of `[text, hl_group]` arrays, each representing a
text chunk with specified highlight. `hl_group` element can
be omitted for no highlight.
• {history} if true, add to |message-history|.
• {opts} Optional parameters.
• verbose: Message was printed as a result of 'verbose'
option if Nvim was invoked with -V3log_file, the message
will be redirected to the log_file and suppressed from
direct output.
nvim_err_write({str}) *nvim_err_write()*
Writes a message to the Vim error buffer. Does not append "\n", the
message is buffered (won't display) until a linefeed is written.
Parameters: ~
• {str} Message
nvim_err_writeln({str}) *nvim_err_writeln()*
Writes a message to the Vim error buffer. Appends "\n", so the buffer is
flushed (and displayed).
Parameters: ~
• {str} Message
See also: ~
• nvim_err_write()
nvim_eval_statusline({str}, {opts}) *nvim_eval_statusline()*
Evaluates statusline string.
Attributes: ~
|api-fast|
Parameters: ~
• {str} Statusline string (see 'statusline').
• {opts} Optional parameters.
• winid: (number) |window-ID| of the window to use as context
for statusline.
• maxwidth: (number) Maximum width of statusline.
• fillchar: (string) Character to fill blank spaces in the
statusline (see 'fillchars'). Treated as single-width even
if it isn't.
• highlights: (boolean) Return highlight information.
• use_winbar: (boolean) Evaluate winbar instead of statusline.
• use_tabline: (boolean) Evaluate tabline instead of
statusline. When true, {winid} is ignored. Mutually
exclusive with {use_winbar}.
• use_statuscol_lnum: (number) Evaluate statuscolumn for this
line number instead of statusline.
Return: ~
Dictionary containing statusline information, with these keys:
• str: (string) Characters that will be displayed on the statusline.
• width: (number) Display width of the statusline.
• highlights: Array containing highlight information of the
statusline. Only included when the "highlights" key in {opts} is
true. Each element of the array is a |Dictionary| with these keys:
• start: (number) Byte index (0-based) of first character that uses
the highlight.
• group: (string) Name of highlight group.
nvim_exec_lua({code}, {args}) *nvim_exec_lua()*
Execute Lua code. Parameters (if any) are available as `...` inside the
chunk. The chunk can return a value.
Only statements are executed. To evaluate an expression, prefix it with
`return`: return my_function(...)
Attributes: ~
|RPC| only
Parameters: ~
• {code} Lua code to execute
• {args} Arguments to the code
Return: ~
Return value of Lua code if present or NIL.
nvim_feedkeys({keys}, {mode}, {escape_ks}) *nvim_feedkeys()*
Sends input-keys to Nvim, subject to various quirks controlled by `mode`
flags. This is a blocking call, unlike |nvim_input()|.
On execution error: does not fail, but updates v:errmsg.
To input sequences like <C-o> use |nvim_replace_termcodes()| (typically
with escape_ks=false) to replace |keycodes|, then pass the result to
nvim_feedkeys().
Example: >vim
:let key = nvim_replace_termcodes("<C-o>", v:true, v:false, v:true)
:call nvim_feedkeys(key, 'n', v:false)
<
Parameters: ~
• {keys} to be typed
• {mode} behavior flags, see |feedkeys()|
• {escape_ks} If true, escape K_SPECIAL bytes in `keys`. This should be
false if you already used |nvim_replace_termcodes()|, and
true otherwise.
See also: ~
• feedkeys()
• vim_strsave_escape_ks
nvim_get_api_info() *nvim_get_api_info()*
Returns a 2-tuple (Array), where item 0 is the current channel id and item
1 is the |api-metadata| map (Dictionary).
Attributes: ~
|api-fast|
|RPC| only
Return: ~
2-tuple `[{channel-id}, {api-metadata}]`
nvim_get_chan_info({chan}) *nvim_get_chan_info()*
Gets information about a channel.
Parameters: ~
• {chan} channel_id, or 0 for current channel
Return: ~
Dictionary describing a channel, with these keys:
• "id" Channel id.
• "argv" (optional) Job arguments list.
• "stream" Stream underlying the channel.
• "stdio" stdin and stdout of this Nvim instance
• "stderr" stderr of this Nvim instance
• "socket" TCP/IP socket or named pipe
• "job" Job with communication over its stdio.
• "mode" How data received on the channel is interpreted.
• "bytes" Send and receive raw bytes.
• "terminal" |terminal| instance interprets ASCII sequences.
• "rpc" |RPC| communication on the channel is active.
• "pty" (optional) Name of pseudoterminal. On a POSIX system this is a
device path like "/dev/pts/1". If the name is unknown, the key will
still be present if a pty is used (e.g. for conpty on Windows).
• "buffer" (optional) Buffer with connected |terminal| instance.
• "client" (optional) Info about the peer (client on the other end of
the RPC channel), if provided by it via |nvim_set_client_info()|.
nvim_get_color_by_name({name}) *nvim_get_color_by_name()*
Returns the 24-bit RGB value of a |nvim_get_color_map()| color name or
"#rrggbb" hexadecimal string.
Example: >vim
:echo nvim_get_color_by_name("Pink")
:echo nvim_get_color_by_name("#cbcbcb")
<
Parameters: ~
• {name} Color name or "#rrggbb" string
Return: ~
24-bit RGB value, or -1 for invalid argument.
nvim_get_color_map() *nvim_get_color_map()*
Returns a map of color names and RGB values.
Keys are color names (e.g. "Aqua") and values are 24-bit RGB color values
(e.g. 65535).
Return: ~
Map of color names and RGB values.
nvim_get_context({opts}) *nvim_get_context()*
Gets a map of the current editor state.
Parameters: ~
• {opts} Optional parameters.
• types: List of |context-types| ("regs", "jumps", "bufs",
"gvars", …) to gather, or empty for "all".
Return: ~
map of global |context|.
nvim_get_current_buf() *nvim_get_current_buf()*
Gets the current buffer.
Return: ~
Buffer handle
nvim_get_current_line() *nvim_get_current_line()*
Gets the current line.
Return: ~
Current line string
nvim_get_current_tabpage() *nvim_get_current_tabpage()*
Gets the current tabpage.
Return: ~
Tabpage handle
nvim_get_current_win() *nvim_get_current_win()*
Gets the current window.
Return: ~
Window handle
nvim_get_hl({ns_id}, {opts}) *nvim_get_hl()*
Gets all or specific highlight groups in a namespace.
Note: ~
• When the `link` attribute is defined in the highlight definition map,
other attributes will not be taking effect (see |:hi-link|).
Parameters: ~
• {ns_id} Get highlight groups for namespace ns_id
|nvim_get_namespaces()|. Use 0 to get global highlight groups
|:highlight|.
• {opts} Options dict:
• name: (string) Get a highlight definition by name.
• id: (integer) Get a highlight definition by id.
• link: (boolean, default true) Show linked group name
instead of effective definition |:hi-link|.
• create: (boolean, default true) When highlight group
doesn't exist create it.
Return: ~
Highlight groups as a map from group name to a highlight definition
map as in |nvim_set_hl()|, or only a single highlight definition map
if requested by name or id.
nvim_get_hl_id_by_name({name}) *nvim_get_hl_id_by_name()*
Gets a highlight group by name
similar to |hlID()|, but allocates a new ID if not present.
nvim_get_hl_ns({opts}) *nvim_get_hl_ns()*
Gets the active highlight namespace.
Parameters: ~
• {opts} Optional parameters
• winid: (number) |window-ID| for retrieving a window's
highlight namespace. A value of -1 is returned when
|nvim_win_set_hl_ns()| has not been called for the window
(or was called with a namespace of -1).
Return: ~
Namespace id, or -1
nvim_get_keymap({mode}) *nvim_get_keymap()*
Gets a list of global (non-buffer-local) |mapping| definitions.
Parameters: ~
• {mode} Mode short-name ("n", "i", "v", ...)
Return: ~
Array of |maparg()|-like dictionaries describing mappings. The
"buffer" key is always zero.
nvim_get_mark({name}, {opts}) *nvim_get_mark()*
Returns a `(row, col, buffer, buffername)` tuple representing the position
of the uppercase/file named mark. "End of line" column position is
returned as |v:maxcol| (big number). See |mark-motions|.
Marks are (1,0)-indexed. |api-indexing|
Note: ~
• Lowercase name (or other buffer-local mark) is an error.
Parameters: ~
• {name} Mark name
• {opts} Optional parameters. Reserved for future use.
Return: ~
4-tuple (row, col, buffer, buffername), (0, 0, 0, '') if the mark is
not set.
See also: ~
• |nvim_buf_set_mark()|
• |nvim_del_mark()|
nvim_get_mode() *nvim_get_mode()*
Gets the current mode. |mode()| "blocking" is true if Nvim is waiting for
input.
Attributes: ~
|api-fast|
Return: ~
Dictionary { "mode": String, "blocking": Boolean }
nvim_get_proc({pid}) *nvim_get_proc()*
Gets info describing process `pid`.
Return: ~
Map of process properties, or NIL if process not found.
nvim_get_proc_children({pid}) *nvim_get_proc_children()*
Gets the immediate children of process `pid`.
Return: ~
Array of child process ids, empty if process not found.
nvim_get_runtime_file({name}, {all}) *nvim_get_runtime_file()*
Find files in runtime directories
"name" can contain wildcards. For example
nvim_get_runtime_file("colors/*.vim", true) will return all color scheme
files. Always use forward slashes (/) in the search pattern for
subdirectories regardless of platform.
It is not an error to not find any files. An empty array is returned then.
Attributes: ~
|api-fast|
Parameters: ~
• {name} pattern of files to search for
• {all} whether to return all matches or only the first
Return: ~
list of absolute paths to the found files
nvim_get_var({name}) *nvim_get_var()*
Gets a global (g:) variable.
Parameters: ~
• {name} Variable name
Return: ~
Variable value
nvim_get_vvar({name}) *nvim_get_vvar()*
Gets a v: variable.
Parameters: ~
• {name} Variable name
Return: ~
Variable value
nvim_input({keys}) *nvim_input()*
Queues raw user-input. Unlike |nvim_feedkeys()|, this uses a low-level
input buffer and the call is non-blocking (input is processed
asynchronously by the eventloop).
On execution error: does not fail, but updates v:errmsg.
Note: ~
• |keycodes| like <CR> are translated, so "<" is special. To input a
literal "<", send <LT>.
• For mouse events use |nvim_input_mouse()|. The pseudokey form
`<LeftMouse><col,row>` is deprecated since |api-level| 6.
Attributes: ~
|api-fast|
Parameters: ~
• {keys} to be typed
Return: ~
Number of bytes actually written (can be fewer than requested if the
buffer becomes full).
*nvim_input_mouse()*
nvim_input_mouse({button}, {action}, {modifier}, {grid}, {row}, {col})
Send mouse event from GUI.
Non-blocking: does not wait on any result, but queues the event to be
processed soon by the event loop.
Note: ~
• Currently this doesn't support "scripting" multiple mouse events by
calling it multiple times in a loop: the intermediate mouse positions
will be ignored. It should be used to implement real-time mouse input
in a GUI. The deprecated pseudokey form (`<LeftMouse><col,row>`) of
|nvim_input()| has the same limitation.
Attributes: ~
|api-fast|
Parameters: ~
• {button} Mouse button: one of "left", "right", "middle", "wheel",
"move", "x1", "x2".
• {action} For ordinary buttons, one of "press", "drag", "release".
For the wheel, one of "up", "down", "left", "right".
Ignored for "move".
• {modifier} String of modifiers each represented by a single char. The
same specifiers are used as for a key press, except that
the "-" separator is optional, so "C-A-", "c-a" and "CA"
can all be used to specify Ctrl+Alt+click.
• {grid} Grid number if the client uses |ui-multigrid|, else 0.
• {row} Mouse row-position (zero-based, like redraw events)
• {col} Mouse column-position (zero-based, like redraw events)
nvim_list_bufs() *nvim_list_bufs()*
Gets the current list of buffer handles
Includes unlisted (unloaded/deleted) buffers, like `:ls!`. Use
|nvim_buf_is_loaded()| to check if a buffer is loaded.
Return: ~
List of buffer handles
nvim_list_chans() *nvim_list_chans()*
Get information about all open channels.
Return: ~
Array of Dictionaries, each describing a channel with the format
specified at |nvim_get_chan_info()|.
nvim_list_runtime_paths() *nvim_list_runtime_paths()*
Gets the paths contained in |runtime-search-path|.
Return: ~
List of paths
nvim_list_tabpages() *nvim_list_tabpages()*
Gets the current list of tabpage handles.
Return: ~
List of tabpage handles
nvim_list_uis() *nvim_list_uis()*
Gets a list of dictionaries representing attached UIs.
Return: ~
Array of UI dictionaries, each with these keys:
• "height" Requested height of the UI
• "width" Requested width of the UI
• "rgb" true if the UI uses RGB colors (false implies |cterm-colors|)
• "ext_..." Requested UI extensions, see |ui-option|
• "chan" |channel-id| of remote UI
nvim_list_wins() *nvim_list_wins()*
Gets the current list of window handles.
Return: ~
List of window handles
nvim_load_context({dict}) *nvim_load_context()*
Sets the current editor state from the given |context| map.
Parameters: ~
• {dict} |Context| map.
nvim_notify({msg}, {log_level}, {opts}) *nvim_notify()*
Notify the user with a message
Relays the call to vim.notify . By default forwards your message in the
echo area but can be overridden to trigger desktop notifications.
Parameters: ~
• {msg} Message to display to the user
• {log_level} The log level
• {opts} Reserved for future use.
nvim_open_term({buffer}, {opts}) *nvim_open_term()*
Open a terminal instance in a buffer
By default (and currently the only option) the terminal will not be
connected to an external process. Instead, input send on the channel will
be echoed directly by the terminal. This is useful to display ANSI
terminal sequences returned as part of a rpc message, or similar.
Note: to directly initiate the terminal using the right size, display the
buffer in a configured window before calling this. For instance, for a
floating display, first create an empty buffer using |nvim_create_buf()|,
then display it using |nvim_open_win()|, and then call this function. Then
|nvim_chan_send()| can be called immediately to process sequences in a
virtual terminal having the intended size.
Attributes: ~
not allowed when |textlock| is active
Parameters: ~
• {buffer} the buffer to use (expected to be empty)
• {opts} Optional parameters.
• on_input: Lua callback for input sent, i e keypresses in
terminal mode. Note: keypresses are sent raw as they would
be to the pty master end. For instance, a carriage return
is sent as a "\r", not as a "\n". |textlock| applies. It
is possible to call |nvim_chan_send()| directly in the
callback however. `["input", term, bufnr, data]`
• force_crlf: (boolean, default true) Convert "\n" to
"\r\n".
Return: ~
Channel id, or 0 on error
nvim_out_write({str}) *nvim_out_write()*
Writes a message to the Vim output buffer. Does not append "\n", the
message is buffered (won't display) until a linefeed is written.
Parameters: ~
• {str} Message
nvim_paste({data}, {crlf}, {phase}) *nvim_paste()*
Pastes at cursor, in any mode.
Invokes the `vim.paste` handler, which handles each mode appropriately.
Sets redo/undo. Faster than |nvim_input()|. Lines break at LF ("\n").
Errors ('nomodifiable', `vim.paste()` failure, …) are reflected in `err`
but do not affect the return value (which is strictly decided by
`vim.paste()`). On error, subsequent calls are ignored ("drained") until
the next paste is initiated (phase 1 or -1).
Attributes: ~
not allowed when |textlock| is active
Parameters: ~
• {data} Multiline input. May be binary (containing NUL bytes).
• {crlf} Also break lines at CR and CRLF.
• {phase} -1: paste in a single call (i.e. without streaming). To
"stream" a paste, call `nvim_paste` sequentially with these
`phase` values:
• 1: starts the paste (exactly once)
• 2: continues the paste (zero or more times)
• 3: ends the paste (exactly once)
Return: ~
• true: Client may continue pasting.
• false: Client must cancel the paste.
nvim_put({lines}, {type}, {after}, {follow}) *nvim_put()*
Puts text at cursor, in any mode.
Compare |:put| and |p| which are always linewise.
Attributes: ~
not allowed when |textlock| is active
Parameters: ~
• {lines} |readfile()|-style list of lines. |channel-lines|
• {type} Edit behavior: any |getregtype()| result, or:
• "b" |blockwise-visual| mode (may include width, e.g. "b3")
• "c" |charwise| mode
• "l" |linewise| mode
• "" guess by contents, see |setreg()|
• {after} If true insert after cursor (like |p|), or before (like
|P|).
• {follow} If true place cursor at end of inserted text.
*nvim_replace_termcodes()*
nvim_replace_termcodes({str}, {from_part}, {do_lt}, {special})
Replaces terminal codes and |keycodes| (<CR>, <Esc>, ...) in a string with
the internal representation.
Parameters: ~
• {str} String to be converted.
• {from_part} Legacy Vim parameter. Usually true.
• {do_lt} Also translate <lt>. Ignored if `special` is false.
• {special} Replace |keycodes|, e.g. <CR> becomes a "\r" char.
See also: ~
• replace_termcodes
• cpoptions
*nvim_select_popupmenu_item()*
nvim_select_popupmenu_item({item}, {insert}, {finish}, {opts})
Selects an item in the completion popup menu.
If neither |ins-completion| nor |cmdline-completion| popup menu is active
this API call is silently ignored. Useful for an external UI using
|ui-popupmenu| to control the popup menu with the mouse. Can also be used
in a mapping; use <Cmd> |:map-cmd| or a Lua mapping to ensure the mapping
doesn't end completion mode.
Parameters: ~
• {item} Index (zero-based) of the item to select. Value of -1
selects nothing and restores the original text.
• {insert} For |ins-completion|, whether the selection should be
inserted in the buffer. Ignored for |cmdline-completion|.
• {finish} Finish the completion and dismiss the popup menu. Implies
{insert}.
• {opts} Optional parameters. Reserved for future use.
*nvim_set_client_info()*
nvim_set_client_info({name}, {version}, {type}, {methods}, {attributes})
Self-identifies the client.
The client/plugin/application should call this after connecting, to
provide hints about its identity and purpose, for debugging and
orchestration.
Can be called more than once; the caller should merge old info if
appropriate. Example: library first identifies the channel, then a plugin
using that library later identifies itself.
Note: ~
• "Something is better than nothing". You don't need to include all the
fields.
Attributes: ~
|RPC| only
Parameters: ~
• {name} Short name for the connected client
• {version} Dictionary describing the version, with these (optional)
keys:
• "major" major version (defaults to 0 if not set, for
no release yet)
• "minor" minor version
• "patch" patch number
• "prerelease" string describing a prerelease, like
"dev" or "beta1"
• "commit" hash or similar identifier of commit
• {type} Must be one of the following values. Client libraries
should default to "remote" unless overridden by the
user.
• "remote" remote client connected "Nvim flavored"
MessagePack-RPC (responses must be in reverse order of
requests). |msgpack-rpc|
• "msgpack-rpc" remote client connected to Nvim via
fully MessagePack-RPC compliant protocol.
• "ui" gui frontend
• "embedder" application using Nvim as a component (for
example, IDE/editor implementing a vim mode).
• "host" plugin host, typically started by nvim
• "plugin" single plugin, started by nvim
• {methods} Builtin methods in the client. For a host, this does not
include plugin methods which will be discovered later.
The key should be the method name, the values are dicts
with these (optional) keys (more keys may be added in
future versions of Nvim, thus unknown keys are ignored.
Clients must only use keys defined in this or later
versions of Nvim):
• "async" if true, send as a notification. If false or
unspecified, use a blocking request
• "nargs" Number of arguments. Could be a single integer
or an array of two integers, minimum and maximum
inclusive.
• {attributes} Arbitrary string:string map of informal client
properties. Suggested keys:
• "website": Client homepage URL (e.g. GitHub
repository)
• "license": License description ("Apache 2", "GPLv3",
"MIT", …)
• "logo": URI or path to image, preferably small logo or
icon. .png or .svg format is preferred.
nvim_set_current_buf({buffer}) *nvim_set_current_buf()*
Sets the current buffer.
Attributes: ~
not allowed when |textlock| is active or in the |cmdwin|
Parameters: ~
• {buffer} Buffer handle
nvim_set_current_dir({dir}) *nvim_set_current_dir()*
Changes the global working directory.
Parameters: ~
• {dir} Directory path
nvim_set_current_line({line}) *nvim_set_current_line()*
Sets the current line.
Attributes: ~
not allowed when |textlock| is active
Parameters: ~
• {line} Line contents
nvim_set_current_tabpage({tabpage}) *nvim_set_current_tabpage()*
Sets the current tabpage.
Attributes: ~
not allowed when |textlock| is active or in the |cmdwin|
Parameters: ~
• {tabpage} Tabpage handle
nvim_set_current_win({window}) *nvim_set_current_win()*
Sets the current window.
Attributes: ~
not allowed when |textlock| is active or in the |cmdwin|
Parameters: ~
• {window} Window handle
nvim_set_hl({ns_id}, {name}, {val}) *nvim_set_hl()*
Sets a highlight group.
Note: ~
• Unlike the `:highlight` command which can update a highlight group,
this function completely replaces the definition. For example:
`nvim_set_hl(0, 'Visual', {})` will clear the highlight group
'Visual'.
• The fg and bg keys also accept the string values `"fg"` or `"bg"`
which act as aliases to the corresponding foreground and background
values of the Normal group. If the Normal group has not been defined,
using these values results in an error.
• If `link` is used in combination with other attributes; only the
`link` will take effect (see |:hi-link|).
Parameters: ~
• {ns_id} Namespace id for this highlight |nvim_create_namespace()|.
Use 0 to set a highlight group globally |:highlight|.
Highlights from non-global namespaces are not active by
default, use |nvim_set_hl_ns()| or |nvim_win_set_hl_ns()| to
activate them.
• {name} Highlight group name, e.g. "ErrorMsg"
• {val} Highlight definition map, accepts the following keys:
• fg: color name or "#RRGGBB", see note.
• bg: color name or "#RRGGBB", see note.
• sp: color name or "#RRGGBB"
• blend: integer between 0 and 100
• bold: boolean
• standout: boolean
• underline: boolean
• undercurl: boolean
• underdouble: boolean
• underdotted: boolean
• underdashed: boolean
• strikethrough: boolean
• italic: boolean
• reverse: boolean
• nocombine: boolean
• link: name of another highlight group to link to, see
|:hi-link|.
• default: Don't override existing definition |:hi-default|
• ctermfg: Sets foreground of cterm color |ctermfg|
• ctermbg: Sets background of cterm color |ctermbg|
• cterm: cterm attribute map, like |highlight-args|. If not
set, cterm attributes will match those from the attribute
map documented above.
• force: if true force update the highlight group when it
exists.
nvim_set_hl_ns({ns_id}) *nvim_set_hl_ns()*
Set active namespace for highlights defined with |nvim_set_hl()|. This can
be set for a single window, see |nvim_win_set_hl_ns()|.
Parameters: ~
• {ns_id} the namespace to use
nvim_set_hl_ns_fast({ns_id}) *nvim_set_hl_ns_fast()*
Set active namespace for highlights defined with |nvim_set_hl()| while
redrawing.
This function meant to be called while redrawing, primarily from
|nvim_set_decoration_provider()| on_win and on_line callbacks, which are
allowed to change the namespace during a redraw cycle.
Attributes: ~
|api-fast|
Parameters: ~
• {ns_id} the namespace to activate
nvim_set_keymap({mode}, {lhs}, {rhs}, {opts}) *nvim_set_keymap()*
Sets a global |mapping| for the given mode.
To set a buffer-local mapping, use |nvim_buf_set_keymap()|.
Unlike |:map|, leading/trailing whitespace is accepted as part of the
{lhs} or {rhs}. Empty {rhs} is <Nop>. |keycodes| are replaced as usual.
Example: >vim
call nvim_set_keymap('n', ' <NL>', '', {'nowait': v:true})
<
is equivalent to: >vim
nmap <nowait> <Space><NL> <Nop>
<
Parameters: ~
• {mode} Mode short-name (map command prefix: "n", "i", "v", "x", …)
or "!" for |:map!|, or empty string for |:map|. "ia", "ca" or
"!a" for abbreviation in Insert mode, Cmdline mode, or both,
respectively
• {lhs} Left-hand-side |{lhs}| of the mapping.
• {rhs} Right-hand-side |{rhs}| of the mapping.
• {opts} Optional parameters map: Accepts all |:map-arguments| as keys
except <buffer>, values are booleans (default false). Also:
• "noremap" disables |recursive_mapping|, like |:noremap|
• "desc" human-readable description.
• "callback" Lua function called in place of {rhs}.
• "replace_keycodes" (boolean) When "expr" is true, replace
keycodes in the resulting string (see
|nvim_replace_termcodes()|). Returning nil from the Lua
"callback" is equivalent to returning an empty string.
nvim_set_var({name}, {value}) *nvim_set_var()*
Sets a global (g:) variable.
Parameters: ~
• {name} Variable name
• {value} Variable value
nvim_set_vvar({name}, {value}) *nvim_set_vvar()*
Sets a v: variable, if it is not readonly.
Parameters: ~
• {name} Variable name
• {value} Variable value
nvim_strwidth({text}) *nvim_strwidth()*
Calculates the number of display cells occupied by `text`. Control
characters including <Tab> count as one cell.
Parameters: ~
• {text} Some text
Return: ~
Number of cells
nvim__complete_set({index}, {opts}) *nvim__complete_set()*
EXPERIMENTAL: this API may change in the future.
Sets info for the completion item at the given index. If the info text was
shown in a window, returns the window and buffer ids, or empty dict if not
shown.
Parameters: ~
• {index} Completion candidate index
• {opts} Optional parameters.
• info: (string) info text.
Return: ~
Dictionary containing these keys:
• winid: (number) floating window id
• bufnr: (number) buffer id in floating window
nvim__get_runtime({pat}, {all}, {opts}) *nvim__get_runtime()*
Find files in runtime directories
Attributes: ~
|api-fast|
Parameters: ~
• {pat} pattern of files to search for
• {all} whether to return all matches or only the first
• {opts} is_lua: only search Lua subdirs
Return: ~
list of absolute paths to the found files
nvim__id({obj}) *nvim__id()*
Returns object given as argument.
This API function is used for testing. One should not rely on its presence
in plugins.
Parameters: ~
• {obj} Object to return.
Return: ~
its argument.
nvim__id_array({arr}) *nvim__id_array()*
Returns array given as argument.
This API function is used for testing. One should not rely on its presence
in plugins.
Parameters: ~
• {arr} Array to return.
Return: ~
its argument.
nvim__id_dictionary({dct}) *nvim__id_dictionary()*
Returns dictionary given as argument.
This API function is used for testing. One should not rely on its presence
in plugins.
Parameters: ~
• {dct} Dictionary to return.
Return: ~
its argument.
nvim__id_float({flt}) *nvim__id_float()*
Returns floating-point value given as argument.
This API function is used for testing. One should not rely on its presence
in plugins.
Parameters: ~
• {flt} Value to return.
Return: ~
its argument.
nvim__inspect_cell({grid}, {row}, {col}) *nvim__inspect_cell()*
NB: if your UI doesn't use hlstate, this will not return hlstate first
time.
nvim__invalidate_glyph_cache() *nvim__invalidate_glyph_cache()*
For testing. The condition in schar_cache_clear_if_full is hard to reach,
so this function can be used to force a cache clear in a test.
nvim__redraw({opts}) *nvim__redraw()*
EXPERIMENTAL: this API may change in the future.
Instruct Nvim to redraw various components.
Parameters: ~
• {opts} Optional parameters.
• win: Target a specific |window-ID| as described below.
• buf: Target a specific buffer number as described below.
• flush: Update the screen with pending updates.
• valid: When present mark `win`, `buf`, or all windows for
redraw. When `true`, only redraw changed lines (useful for
decoration providers). When `false`, forcefully redraw.
• range: Redraw a range in `buf`, the buffer in `win` or the
current buffer (useful for decoration providers). Expects a
tuple `[first, last]` with the first and last line number of
the range, 0-based end-exclusive |api-indexing|.
• cursor: Immediately update cursor position on the screen in
`win` or the current window.
• statuscolumn: Redraw the 'statuscolumn' in `buf`, `win` or
all windows.
• statusline: Redraw the 'statusline' in `buf`, `win` or all
windows.
• winbar: Redraw the 'winbar' in `buf`, `win` or all windows.
• tabline: Redraw the 'tabline'.
See also: ~
• |:redraw|
nvim__stats() *nvim__stats()*
Gets internal stats.
Return: ~
Map of various internal stats.
==============================================================================
Vimscript Functions *api-vimscript*
*nvim_call_dict_function()*
nvim_call_dict_function({dict}, {fn}, {args})
Calls a Vimscript |Dictionary-function| with the given arguments.
On execution error: fails with Vimscript error, updates v:errmsg.
Parameters: ~
• {dict} Dictionary, or String evaluating to a Vimscript |self| dict
• {fn} Name of the function defined on the Vimscript dict
• {args} Function arguments packed in an Array
Return: ~
Result of the function call
nvim_call_function({fn}, {args}) *nvim_call_function()*
Calls a Vimscript function with the given arguments.
On execution error: fails with Vimscript error, updates v:errmsg.
Parameters: ~
• {fn} Function to call
• {args} Function arguments packed in an Array
Return: ~
Result of the function call
nvim_command({command}) *nvim_command()*
Executes an Ex command.
On execution error: fails with Vimscript error, updates v:errmsg.
Prefer using |nvim_cmd()| or |nvim_exec2()| over this. To evaluate
multiple lines of Vim script or an Ex command directly, use
|nvim_exec2()|. To construct an Ex command using a structured format and
then execute it, use |nvim_cmd()|. To modify an Ex command before
evaluating it, use |nvim_parse_cmd()| in conjunction with |nvim_cmd()|.
Parameters: ~
• {command} Ex command string
nvim_eval({expr}) *nvim_eval()*
Evaluates a Vimscript |expression|. Dictionaries and Lists are recursively
expanded.
On execution error: fails with Vimscript error, updates v:errmsg.
Parameters: ~
• {expr} Vimscript expression string
Return: ~
Evaluation result or expanded object
nvim_exec2({src}, {opts}) *nvim_exec2()*
Executes Vimscript (multiline block of Ex commands), like anonymous
|:source|.
Unlike |nvim_command()| this function supports heredocs, script-scope
(s:), etc.
On execution error: fails with Vimscript error, updates v:errmsg.
Parameters: ~
• {src} Vimscript code
• {opts} Optional parameters.
• output: (boolean, default false) Whether to capture and
return all (non-error, non-shell |:!|) output.
Return: ~
Dictionary containing information about execution, with these keys:
• output: (string|nil) Output if `opts.output` is true.
See also: ~
• |execute()|
• |nvim_command()|
• |nvim_cmd()|
*nvim_parse_expression()*
nvim_parse_expression({expr}, {flags}, {highlight})
Parse a Vimscript expression.
Attributes: ~
|api-fast|
Parameters: ~
• {expr} Expression to parse. Always treated as a single line.
• {flags} Flags:
• "m" if multiple expressions in a row are allowed (only
the first one will be parsed),
• "E" if EOC tokens are not allowed (determines whether
they will stop parsing process or be recognized as an
operator/space, though also yielding an error).
• "l" when needing to start parsing with lvalues for
":let" or ":for". Common flag sets:
• "m" to parse like for `":echo"`.
• "E" to parse like for `"<C-r>="`.
• empty string for ":call".
• "lm" to parse for ":let".
• {highlight} If true, return value will also include "highlight" key
containing array of 4-tuples (arrays) (Integer, Integer,
Integer, String), where first three numbers define the
highlighted region and represent line, starting column
and ending column (latter exclusive: one should highlight
region [start_col, end_col)).
Return: ~
• AST: top-level dictionary with these keys:
• "error": Dictionary with error, present only if parser saw some
error. Contains the following keys:
• "message": String, error message in printf format, translated.
Must contain exactly one "%.*s".
• "arg": String, error message argument.
• "len": Amount of bytes successfully parsed. With flags equal to ""
that should be equal to the length of expr string. ("Successfully
parsed" here means "participated in AST creation", not "till the
first error".)
• "ast": AST, either nil or a dictionary with these keys:
• "type": node type, one of the value names from ExprASTNodeType
stringified without "kExprNode" prefix.
• "start": a pair `[line, column]` describing where node is
"started" where "line" is always 0 (will not be 0 if you will be
using this API on e.g. ":let", but that is not present yet).
Both elements are Integers.
• "len": “length” of the node. This and "start" are there for
debugging purposes primary (debugging parser and providing debug
information).
• "children": a list of nodes described in top/"ast". There always
is zero, one or two children, key will not be present if node
has no children. Maximum number of children may be found in
node_maxchildren array.
• Local values (present only for certain nodes):
• "scope": a single Integer, specifies scope for "Option" and
"PlainIdentifier" nodes. For "Option" it is one of ExprOptScope
values, for "PlainIdentifier" it is one of ExprVarScope values.
• "ident": identifier (without scope, if any), present for "Option",
"PlainIdentifier", "PlainKey" and "Environment" nodes.
• "name": Integer, register name (one character) or -1. Only present
for "Register" nodes.
• "cmp_type": String, comparison type, one of the value names from
ExprComparisonType, stringified without "kExprCmp" prefix. Only
present for "Comparison" nodes.
• "ccs_strategy": String, case comparison strategy, one of the value
names from ExprCaseCompareStrategy, stringified without
"kCCStrategy" prefix. Only present for "Comparison" nodes.
• "augmentation": String, augmentation type for "Assignment" nodes.
Is either an empty string, "Add", "Subtract" or "Concat" for "=",
"+=", "-=" or ".=" respectively.
• "invert": Boolean, true if result of comparison needs to be
inverted. Only present for "Comparison" nodes.
• "ivalue": Integer, integer value for "Integer" nodes.
• "fvalue": Float, floating-point value for "Float" nodes.
• "svalue": String, value for "SingleQuotedString" and
"DoubleQuotedString" nodes.
==============================================================================
Command Functions *api-command*
*nvim_buf_create_user_command()*
nvim_buf_create_user_command({buffer}, {name}, {command}, {opts})
Creates a buffer-local command |user-commands|.
Parameters: ~
• {buffer} Buffer handle, or 0 for current buffer.
See also: ~
• nvim_create_user_command
*nvim_buf_del_user_command()*
nvim_buf_del_user_command({buffer}, {name})
Delete a buffer-local user-defined command.
Only commands created with |:command-buffer| or
|nvim_buf_create_user_command()| can be deleted with this function.
Parameters: ~
• {buffer} Buffer handle, or 0 for current buffer.
• {name} Name of the command to delete.
nvim_buf_get_commands({buffer}, {opts}) *nvim_buf_get_commands()*
Gets a map of buffer-local |user-commands|.
Parameters: ~
• {buffer} Buffer handle, or 0 for current buffer
• {opts} Optional parameters. Currently not used.
Return: ~
Map of maps describing commands.
nvim_cmd({cmd}, {opts}) *nvim_cmd()*
Executes an Ex command.
Unlike |nvim_command()| this command takes a structured Dictionary instead
of a String. This allows for easier construction and manipulation of an Ex
command. This also allows for things such as having spaces inside a
command argument, expanding filenames in a command that otherwise doesn't
expand filenames, etc. Command arguments may also be Number, Boolean or
String.
The first argument may also be used instead of count for commands that
support it in order to make their usage simpler with |vim.cmd()|. For
example, instead of `vim.cmd.bdelete{ count = 2 }`, you may do
`vim.cmd.bdelete(2)`.
On execution error: fails with Vimscript error, updates v:errmsg.
Parameters: ~
• {cmd} Command to execute. Must be a Dictionary that can contain the
same values as the return value of |nvim_parse_cmd()| except
"addr", "nargs" and "nextcmd" which are ignored if provided.
All values except for "cmd" are optional.
• {opts} Optional parameters.
• output: (boolean, default false) Whether to return command
output.
Return: ~
Command output (non-error, non-shell |:!|) if `output` is true, else
empty string.
See also: ~
• |nvim_exec2()|
• |nvim_command()|
*nvim_create_user_command()*
nvim_create_user_command({name}, {command}, {opts})
Creates a global |user-commands| command.
For Lua usage see |lua-guide-commands-create|.
Example: >vim
:call nvim_create_user_command('SayHello', 'echo "Hello world!"', {'bang': v:true})
:SayHello
Hello world!
<
Parameters: ~
• {name} Name of the new user command. Must begin with an uppercase
letter.
• {command} Replacement command to execute when this user command is
executed. When called from Lua, the command can also be a
Lua function. The function is called with a single table
argument that contains the following keys:
• name: (string) Command name
• args: (string) The args passed to the command, if any
<args>
• fargs: (table) The args split by unescaped whitespace
(when more than one argument is allowed), if any <f-args>
• nargs: (string) Number of arguments |:command-nargs|
• bang: (boolean) "true" if the command was executed with a
! modifier <bang>
• line1: (number) The starting line of the command range
<line1>
• line2: (number) The final line of the command range
<line2>
• range: (number) The number of items in the command range:
0, 1, or 2 <range>
• count: (number) Any count supplied <count>
• reg: (string) The optional register, if specified <reg>
• mods: (string) Command modifiers, if any <mods>
• smods: (table) Command modifiers in a structured format.
Has the same structure as the "mods" key of
|nvim_parse_cmd()|.
• {opts} Optional |command-attributes|.
• Set boolean attributes such as |:command-bang| or
|:command-bar| to true (but not |:command-buffer|, use
|nvim_buf_create_user_command()| instead).
• "complete" |:command-complete| also accepts a Lua
function which works like
|:command-completion-customlist|.
• Other parameters:
• desc: (string) Used for listing the command when a Lua
function is used for {command}.
• force: (boolean, default true) Override any previous
definition.
• preview: (function) Preview callback for 'inccommand'
|:command-preview|
nvim_del_user_command({name}) *nvim_del_user_command()*
Delete a user-defined command.
Parameters: ~
• {name} Name of the command to delete.
nvim_get_commands({opts}) *nvim_get_commands()*
Gets a map of global (non-buffer-local) Ex commands.
Currently only |user-commands| are supported, not builtin Ex commands.
Parameters: ~
• {opts} Optional parameters. Currently only supports {"builtin":false}
Return: ~
Map of maps describing commands.
See also: ~
• |nvim_get_all_options_info()|
nvim_parse_cmd({str}, {opts}) *nvim_parse_cmd()*
Parse command line.
Doesn't check the validity of command arguments.
Attributes: ~
|api-fast|
Parameters: ~
• {str} Command line string to parse. Cannot contain "\n".
• {opts} Optional parameters. Reserved for future use.
Return: ~
Dictionary containing command information, with these keys:
• cmd: (string) Command name.
• range: (array) (optional) Command range (<line1> <line2>). Omitted
if command doesn't accept a range. Otherwise, has no elements if no
range was specified, one element if only a single range item was
specified, or two elements if both range items were specified.
• count: (number) (optional) Command <count>. Omitted if command
cannot take a count.
• reg: (string) (optional) Command <register>. Omitted if command
cannot take a register.
• bang: (boolean) Whether command contains a <bang> (!) modifier.
• args: (array) Command arguments.
• addr: (string) Value of |:command-addr|. Uses short name or "line"
for -addr=lines.
• nargs: (string) Value of |:command-nargs|.
• nextcmd: (string) Next command if there are multiple commands
separated by a |:bar|. Empty if there isn't a next command.
• magic: (dictionary) Which characters have special meaning in the
command arguments.
• file: (boolean) The command expands filenames. Which means
characters such as "%", "#" and wildcards are expanded.
• bar: (boolean) The "|" character is treated as a command separator
and the double quote character (") is treated as the start of a
comment.
• mods: (dictionary) |:command-modifiers|.
• filter: (dictionary) |:filter|.
• pattern: (string) Filter pattern. Empty string if there is no
filter.
• force: (boolean) Whether filter is inverted or not.
• silent: (boolean) |:silent|.
• emsg_silent: (boolean) |:silent!|.
• unsilent: (boolean) |:unsilent|.
• sandbox: (boolean) |:sandbox|.
• noautocmd: (boolean) |:noautocmd|.
• browse: (boolean) |:browse|.
• confirm: (boolean) |:confirm|.
• hide: (boolean) |:hide|.
• horizontal: (boolean) |:horizontal|.
• keepalt: (boolean) |:keepalt|.
• keepjumps: (boolean) |:keepjumps|.
• keepmarks: (boolean) |:keepmarks|.
• keeppatterns: (boolean) |:keeppatterns|.
• lockmarks: (boolean) |:lockmarks|.
• noswapfile: (boolean) |:noswapfile|.
• tab: (integer) |:tab|. -1 when omitted.
• verbose: (integer) |:verbose|. -1 when omitted.
• vertical: (boolean) |:vertical|.
• split: (string) Split modifier string, is an empty string when
there's no split modifier. If there is a split modifier it can be
one of:
• "aboveleft": |:aboveleft|.
• "belowright": |:belowright|.
• "topleft": |:topleft|.
• "botright": |:botright|.
==============================================================================
Options Functions *api-options*
nvim_get_all_options_info() *nvim_get_all_options_info()*
Gets the option information for all options.
The dictionary has the full option names as keys and option metadata
dictionaries as detailed at |nvim_get_option_info2()|.
Return: ~
dictionary of all options
See also: ~
• |nvim_get_commands()|
nvim_get_option_info2({name}, {opts}) *nvim_get_option_info2()*
Gets the option information for one option from arbitrary buffer or window
Resulting dictionary has keys:
• name: Name of the option (like 'filetype')
• shortname: Shortened name of the option (like 'ft')
• type: type of option ("string", "number" or "boolean")
• default: The default value for the option
• was_set: Whether the option was set.
• last_set_sid: Last set script id (if any)
• last_set_linenr: line number where option was set
• last_set_chan: Channel where option was set (0 for local)
• scope: one of "global", "win", or "buf"
• global_local: whether win or buf option has a global value
• commalist: List of comma separated values
• flaglist: List of single char flags
When {scope} is not provided, the last set information applies to the
local value in the current buffer or window if it is available, otherwise
the global value information is returned. This behavior can be disabled by
explicitly specifying {scope} in the {opts} table.
Parameters: ~
• {name} Option name
• {opts} Optional parameters
• scope: One of "global" or "local". Analogous to |:setglobal|
and |:setlocal|, respectively.
• win: |window-ID|. Used for getting window local options.
• buf: Buffer number. Used for getting buffer local options.
Implies {scope} is "local".
Return: ~
Option Information
nvim_get_option_value({name}, {opts}) *nvim_get_option_value()*
Gets the value of an option. The behavior of this function matches that of
|:set|: the local value of an option is returned if it exists; otherwise,
the global value is returned. Local values always correspond to the
current buffer or window, unless "buf" or "win" is set in {opts}.
Parameters: ~
• {name} Option name
• {opts} Optional parameters
• scope: One of "global" or "local". Analogous to |:setglobal|
and |:setlocal|, respectively.
• win: |window-ID|. Used for getting window local options.
• buf: Buffer number. Used for getting buffer local options.
Implies {scope} is "local".
• filetype: |filetype|. Used to get the default option for a
specific filetype. Cannot be used with any other option.
Note: this will trigger |ftplugin| and all |FileType|
autocommands for the corresponding filetype.
Return: ~
Option value
*nvim_set_option_value()*
nvim_set_option_value({name}, {value}, {opts})
Sets the value of an option. The behavior of this function matches that of
|:set|: for global-local options, both the global and local value are set
unless otherwise specified with {scope}.
Note the options {win} and {buf} cannot be used together.
Parameters: ~
• {name} Option name
• {value} New option value
• {opts} Optional parameters
• scope: One of "global" or "local". Analogous to
|:setglobal| and |:setlocal|, respectively.
• win: |window-ID|. Used for setting window local option.
• buf: Buffer number. Used for setting buffer local option.
==============================================================================
Buffer Functions *api-buffer*
For more information on buffers, see |buffers|.
Unloaded Buffers: ~
Buffers may be unloaded by the |:bunload| command or the buffer's
|'bufhidden'| option. When a buffer is unloaded its file contents are freed
from memory and vim cannot operate on the buffer lines until it is reloaded
(usually by opening the buffer again in a new window). API methods such as
|nvim_buf_get_lines()| and |nvim_buf_line_count()| will be affected.
You can use |nvim_buf_is_loaded()| or |nvim_buf_line_count()| to check
whether a buffer is loaded.
nvim_buf_attach({buffer}, {send_buffer}, {opts}) *nvim_buf_attach()*
Activates buffer-update events on a channel, or as Lua callbacks.
Example (Lua): capture buffer updates in a global `events` variable (use
"vim.print(events)" to see its contents): >lua
events = {}
vim.api.nvim_buf_attach(0, false, {
on_lines = function(...)
table.insert(events, {...})
end,
})
<
Parameters: ~
• {buffer} Buffer handle, or 0 for current buffer
• {send_buffer} True if the initial notification should contain the
whole buffer: first notification will be
`nvim_buf_lines_event`. Else the first notification
will be `nvim_buf_changedtick_event`. Not for Lua
callbacks.
• {opts} Optional parameters.
• on_lines: Lua callback invoked on change. Return a
truthy value (not `false` or `nil`) to detach. Args:
• the string "lines"
• buffer handle
• b:changedtick
• first line that changed (zero-indexed)
• last line that was changed
• last line in the updated range
• byte count of previous contents
• deleted_codepoints (if `utf_sizes` is true)
• deleted_codeunits (if `utf_sizes` is true)
• on_bytes: Lua callback invoked on change. This
callback receives more granular information about the
change compared to on_lines. Return a truthy value
(not `false` or `nil`) to detach. Args:
• the string "bytes"
• buffer handle
• b:changedtick
• start row of the changed text (zero-indexed)
• start column of the changed text
• byte offset of the changed text (from the start of
the buffer)
• old end row of the changed text (offset from start
row)
• old end column of the changed text (if old end row
= 0, offset from start column)
• old end byte length of the changed text
• new end row of the changed text (offset from start
row)
• new end column of the changed text (if new end row
= 0, offset from start column)
• new end byte length of the changed text
• on_changedtick: Lua callback invoked on changedtick
increment without text change. Args:
• the string "changedtick"
• buffer handle
• b:changedtick
• on_detach: Lua callback invoked on detach. Args:
• the string "detach"
• buffer handle
• on_reload: Lua callback invoked on reload. The entire
buffer content should be considered changed. Args:
• the string "reload"
• buffer handle
• utf_sizes: include UTF-32 and UTF-16 size of the
replaced region, as args to `on_lines`.
• preview: also attach to command preview (i.e.
'inccommand') events.
Return: ~
False if attach failed (invalid parameter, or buffer isn't loaded);
otherwise True. TODO: LUA_API_NO_EVAL
See also: ~
• |nvim_buf_detach()|
• |api-buffer-updates-lua|
nvim_buf_call({buffer}, {fun}) *nvim_buf_call()*
call a function with buffer as temporary current buffer
This temporarily switches current buffer to "buffer". If the current
window already shows "buffer", the window is not switched If a window
inside the current tabpage (including a float) already shows the buffer
One of these windows will be set as current window temporarily. Otherwise
a temporary scratch window (called the "autocmd window" for historical
reasons) will be used.
This is useful e.g. to call Vimscript functions that only work with the
current buffer/window currently, like |termopen()|.
Attributes: ~
Lua |vim.api| only
Parameters: ~
• {buffer} Buffer handle, or 0 for current buffer
• {fun} Function to call inside the buffer (currently Lua callable
only)
Return: ~
Return value of function.
nvim_buf_del_keymap({buffer}, {mode}, {lhs}) *nvim_buf_del_keymap()*
Unmaps a buffer-local |mapping| for the given mode.
Parameters: ~
• {buffer} Buffer handle, or 0 for current buffer
See also: ~
• |nvim_del_keymap()|
nvim_buf_del_mark({buffer}, {name}) *nvim_buf_del_mark()*
Deletes a named mark in the buffer. See |mark-motions|.
Note: ~
• only deletes marks set in the buffer, if the mark is not set in the
buffer it will return false.
Parameters: ~
• {buffer} Buffer to set the mark on
• {name} Mark name
Return: ~
true if the mark was deleted, else false.
See also: ~
• |nvim_buf_set_mark()|
• |nvim_del_mark()|
nvim_buf_del_var({buffer}, {name}) *nvim_buf_del_var()*
Removes a buffer-scoped (b:) variable
Parameters: ~
• {buffer} Buffer handle, or 0 for current buffer
• {name} Variable name
nvim_buf_delete({buffer}, {opts}) *nvim_buf_delete()*
Deletes the buffer. See |:bwipeout|
Attributes: ~
not allowed when |textlock| is active or in the |cmdwin|
Parameters: ~
• {buffer} Buffer handle, or 0 for current buffer
• {opts} Optional parameters. Keys:
• force: Force deletion and ignore unsaved changes.
• unload: Unloaded only, do not delete. See |:bunload|
nvim_buf_detach({buffer}) *nvim_buf_detach()*
Deactivates buffer-update events on the channel.
Attributes: ~
|RPC| only
Parameters: ~
• {buffer} Buffer handle, or 0 for current buffer
Return: ~
False if detach failed (because the buffer isn't loaded); otherwise
True.
See also: ~
• |nvim_buf_attach()|
• |api-lua-detach| for detaching Lua callbacks
nvim_buf_get_changedtick({buffer}) *nvim_buf_get_changedtick()*
Gets a changed tick of a buffer
Parameters: ~
• {buffer} Buffer handle, or 0 for current buffer
Return: ~
`b:changedtick` value.
nvim_buf_get_keymap({buffer}, {mode}) *nvim_buf_get_keymap()*
Gets a list of buffer-local |mapping| definitions.
Parameters: ~
• {buffer} Buffer handle, or 0 for current buffer
• {mode} Mode short-name ("n", "i", "v", ...)
Return: ~
Array of |maparg()|-like dictionaries describing mappings. The
"buffer" key holds the associated buffer handle.
*nvim_buf_get_lines()*
nvim_buf_get_lines({buffer}, {start}, {end}, {strict_indexing})
Gets a line-range from the buffer.
Indexing is zero-based, end-exclusive. Negative indices are interpreted as
length+1+index: -1 refers to the index past the end. So to get the last
element use start=-2 and end=-1.
Out-of-bounds indices are clamped to the nearest valid value, unless
`strict_indexing` is set.
Parameters: ~
• {buffer} Buffer handle, or 0 for current buffer
• {start} First line index
• {end} Last line index, exclusive
• {strict_indexing} Whether out-of-bounds should be an error.
Return: ~
Array of lines, or empty array for unloaded buffer.
nvim_buf_get_mark({buffer}, {name}) *nvim_buf_get_mark()*
Returns a `(row,col)` tuple representing the position of the named mark.
"End of line" column position is returned as |v:maxcol| (big number). See
|mark-motions|.
Marks are (1,0)-indexed. |api-indexing|
Parameters: ~
• {buffer} Buffer handle, or 0 for current buffer
• {name} Mark name
Return: ~
(row, col) tuple, (0, 0) if the mark is not set, or is an
uppercase/file mark set in another buffer.
See also: ~
• |nvim_buf_set_mark()|
• |nvim_buf_del_mark()|
nvim_buf_get_name({buffer}) *nvim_buf_get_name()*
Gets the full file name for the buffer
Parameters: ~
• {buffer} Buffer handle, or 0 for current buffer
Return: ~
Buffer name
nvim_buf_get_offset({buffer}, {index}) *nvim_buf_get_offset()*
Returns the byte offset of a line (0-indexed). |api-indexing|
Line 1 (index=0) has offset 0. UTF-8 bytes are counted. EOL is one byte.
'fileformat' and 'fileencoding' are ignored. The line index just after the
last line gives the total byte-count of the buffer. A final EOL byte is
counted if it would be written, see 'eol'.
Unlike |line2byte()|, throws error for out-of-bounds indexing. Returns -1
for unloaded buffer.
Parameters: ~
• {buffer} Buffer handle, or 0 for current buffer
• {index} Line index
Return: ~
Integer byte offset, or -1 for unloaded buffer.
*nvim_buf_get_text()*
nvim_buf_get_text({buffer}, {start_row}, {start_col}, {end_row}, {end_col},
{opts})
Gets a range from the buffer.
This differs from |nvim_buf_get_lines()| in that it allows retrieving only
portions of a line.
Indexing is zero-based. Row indices are end-inclusive, and column indices
are end-exclusive.
Prefer |nvim_buf_get_lines()| when retrieving entire lines.
Parameters: ~
• {buffer} Buffer handle, or 0 for current buffer
• {start_row} First line index
• {start_col} Starting column (byte offset) on first line
• {end_row} Last line index, inclusive
• {end_col} Ending column (byte offset) on last line, exclusive
• {opts} Optional parameters. Currently unused.
Return: ~
Array of lines, or empty array for unloaded buffer.
nvim_buf_get_var({buffer}, {name}) *nvim_buf_get_var()*
Gets a buffer-scoped (b:) variable.
Parameters: ~
• {buffer} Buffer handle, or 0 for current buffer
• {name} Variable name
Return: ~
Variable value
nvim_buf_is_loaded({buffer}) *nvim_buf_is_loaded()*
Checks if a buffer is valid and loaded. See |api-buffer| for more info
about unloaded buffers.
Parameters: ~
• {buffer} Buffer handle, or 0 for current buffer
Return: ~
true if the buffer is valid and loaded, false otherwise.
nvim_buf_is_valid({buffer}) *nvim_buf_is_valid()*
Checks if a buffer is valid.
Note: ~
• Even if a buffer is valid it may have been unloaded. See |api-buffer|
for more info about unloaded buffers.
Parameters: ~
• {buffer} Buffer handle, or 0 for current buffer
Return: ~
true if the buffer is valid, false otherwise.
nvim_buf_line_count({buffer}) *nvim_buf_line_count()*
Returns the number of lines in the given buffer.
Parameters: ~
• {buffer} Buffer handle, or 0 for current buffer
Return: ~
Line count, or 0 for unloaded buffer. |api-buffer|
*nvim_buf_set_keymap()*
nvim_buf_set_keymap({buffer}, {mode}, {lhs}, {rhs}, {opts})
Sets a buffer-local |mapping| for the given mode.
Parameters: ~
• {buffer} Buffer handle, or 0 for current buffer
See also: ~
• |nvim_set_keymap()|
*nvim_buf_set_lines()*
nvim_buf_set_lines({buffer}, {start}, {end}, {strict_indexing}, {replacement})
Sets (replaces) a line-range in the buffer.
Indexing is zero-based, end-exclusive. Negative indices are interpreted as
length+1+index: -1 refers to the index past the end. So to change or
delete the last element use start=-2 and end=-1.
To insert lines at a given index, set `start` and `end` to the same index.
To delete a range of lines, set `replacement` to an empty array.
Out-of-bounds indices are clamped to the nearest valid value, unless
`strict_indexing` is set.
Attributes: ~
not allowed when |textlock| is active
Parameters: ~
• {buffer} Buffer handle, or 0 for current buffer
• {start} First line index
• {end} Last line index, exclusive
• {strict_indexing} Whether out-of-bounds should be an error.
• {replacement} Array of lines to use as replacement
See also: ~
• |nvim_buf_set_text()|
*nvim_buf_set_mark()*
nvim_buf_set_mark({buffer}, {name}, {line}, {col}, {opts})
Sets a named mark in the given buffer, all marks are allowed
file/uppercase, visual, last change, etc. See |mark-motions|.
Marks are (1,0)-indexed. |api-indexing|
Note: ~
• Passing 0 as line deletes the mark
Parameters: ~
• {buffer} Buffer to set the mark on
• {name} Mark name
• {line} Line number
• {col} Column/row number
• {opts} Optional parameters. Reserved for future use.
Return: ~
true if the mark was set, else false.
See also: ~
• |nvim_buf_del_mark()|
• |nvim_buf_get_mark()|
nvim_buf_set_name({buffer}, {name}) *nvim_buf_set_name()*
Sets the full file name for a buffer, like |:file_f|
Parameters: ~
• {buffer} Buffer handle, or 0 for current buffer
• {name} Buffer name
*nvim_buf_set_text()*
nvim_buf_set_text({buffer}, {start_row}, {start_col}, {end_row}, {end_col},
{replacement})
Sets (replaces) a range in the buffer
This is recommended over |nvim_buf_set_lines()| when only modifying parts
of a line, as extmarks will be preserved on non-modified parts of the
touched lines.
Indexing is zero-based. Row indices are end-inclusive, and column indices
are end-exclusive.
To insert text at a given `(row, column)` location, use
`start_row = end_row = row` and `start_col = end_col = col`. To delete the
text in a range, use `replacement = {}`.
Prefer |nvim_buf_set_lines()| if you are only adding or deleting entire
lines.
Prefer |nvim_put()| if you want to insert text at the cursor position.
Attributes: ~
not allowed when |textlock| is active
Parameters: ~
• {buffer} Buffer handle, or 0 for current buffer
• {start_row} First line index
• {start_col} Starting column (byte offset) on first line
• {end_row} Last line index, inclusive
• {end_col} Ending column (byte offset) on last line, exclusive
• {replacement} Array of lines to use as replacement
See also: ~
• |nvim_buf_set_lines()|
• |nvim_put()|
nvim_buf_set_var({buffer}, {name}, {value}) *nvim_buf_set_var()*
Sets a buffer-scoped (b:) variable
Parameters: ~
• {buffer} Buffer handle, or 0 for current buffer
• {name} Variable name
• {value} Variable value
==============================================================================
Extmark Functions *api-extmark*
*nvim_buf_add_highlight()*
nvim_buf_add_highlight({buffer}, {ns_id}, {hl_group}, {line}, {col_start},
{col_end})
Adds a highlight to buffer.
Useful for plugins that dynamically generate highlights to a buffer (like
a semantic highlighter or linter). The function adds a single highlight to
a buffer. Unlike |matchaddpos()| highlights follow changes to line
numbering (as lines are inserted/removed above the highlighted line), like
signs and marks do.
Namespaces are used for batch deletion/updating of a set of highlights. To
create a namespace, use |nvim_create_namespace()| which returns a
namespace id. Pass it in to this function as `ns_id` to add highlights to
the namespace. All highlights in the same namespace can then be cleared
with single call to |nvim_buf_clear_namespace()|. If the highlight never
will be deleted by an API call, pass `ns_id = -1`.
As a shorthand, `ns_id = 0` can be used to create a new namespace for the
highlight, the allocated id is then returned. If `hl_group` is the empty
string no highlight is added, but a new `ns_id` is still returned. This is
supported for backwards compatibility, new code should use
|nvim_create_namespace()| to create a new empty namespace.
Parameters: ~
• {buffer} Buffer handle, or 0 for current buffer
• {ns_id} namespace to use or -1 for ungrouped highlight
• {hl_group} Name of the highlight group to use
• {line} Line to highlight (zero-indexed)
• {col_start} Start of (byte-indexed) column range to highlight
• {col_end} End of (byte-indexed) column range to highlight, or -1 to
highlight to end of line
Return: ~
The ns_id that was used
*nvim_buf_clear_namespace()*
nvim_buf_clear_namespace({buffer}, {ns_id}, {line_start}, {line_end})
Clears |namespace|d objects (highlights, |extmarks|, virtual text) from a
region.
Lines are 0-indexed. |api-indexing| To clear the namespace in the entire
buffer, specify line_start=0 and line_end=-1.
Parameters: ~
• {buffer} Buffer handle, or 0 for current buffer
• {ns_id} Namespace to clear, or -1 to clear all namespaces.
• {line_start} Start of range of lines to clear
• {line_end} End of range of lines to clear (exclusive) or -1 to
clear to end of buffer.
nvim_buf_del_extmark({buffer}, {ns_id}, {id}) *nvim_buf_del_extmark()*
Removes an |extmark|.
Parameters: ~
• {buffer} Buffer handle, or 0 for current buffer
• {ns_id} Namespace id from |nvim_create_namespace()|
• {id} Extmark id
Return: ~
true if the extmark was found, else false
*nvim_buf_get_extmark_by_id()*
nvim_buf_get_extmark_by_id({buffer}, {ns_id}, {id}, {opts})
Gets the position (0-indexed) of an |extmark|.
Parameters: ~
• {buffer} Buffer handle, or 0 for current buffer
• {ns_id} Namespace id from |nvim_create_namespace()|
• {id} Extmark id
• {opts} Optional parameters. Keys:
• details: Whether to include the details dict
• hl_name: Whether to include highlight group name instead
of id, true if omitted
Return: ~
0-indexed (row, col) tuple or empty list () if extmark id was absent
*nvim_buf_get_extmarks()*
nvim_buf_get_extmarks({buffer}, {ns_id}, {start}, {end}, {opts})
Gets |extmarks| in "traversal order" from a |charwise| region defined by
buffer positions (inclusive, 0-indexed |api-indexing|).
Region can be given as (row,col) tuples, or valid extmark ids (whose
positions define the bounds). 0 and -1 are understood as (0,0) and (-1,-1)
respectively, thus the following are equivalent: >lua
vim.api.nvim_buf_get_extmarks(0, my_ns, 0, -1, {})
vim.api.nvim_buf_get_extmarks(0, my_ns, {0,0}, {-1,-1}, {})
<
If `end` is less than `start`, traversal works backwards. (Useful with
`limit`, to get the first marks prior to a given position.)
Note: when using extmark ranges (marks with a end_row/end_col position)
the `overlap` option might be useful. Otherwise only the start position of
an extmark will be considered.
Note: legacy signs placed through the |:sign| commands are implemented as
extmarks and will show up here. Their details array will contain a
`sign_name` field.
Example: >lua
local api = vim.api
local pos = api.nvim_win_get_cursor(0)
local ns = api.nvim_create_namespace('my-plugin')
-- Create new extmark at line 1, column 1.
local m1 = api.nvim_buf_set_extmark(0, ns, 0, 0, {})
-- Create new extmark at line 3, column 1.
local m2 = api.nvim_buf_set_extmark(0, ns, 2, 0, {})
-- Get extmarks only from line 3.
local ms = api.nvim_buf_get_extmarks(0, ns, {2,0}, {2,0}, {})
-- Get all marks in this buffer + namespace.
local all = api.nvim_buf_get_extmarks(0, ns, 0, -1, {})
vim.print(ms)
<
Parameters: ~
• {buffer} Buffer handle, or 0 for current buffer
• {ns_id} Namespace id from |nvim_create_namespace()| or -1 for all
namespaces
• {start} Start of range: a 0-indexed (row, col) or valid extmark id
(whose position defines the bound). |api-indexing|
• {end} End of range (inclusive): a 0-indexed (row, col) or valid
extmark id (whose position defines the bound).
|api-indexing|
• {opts} Optional parameters. Keys:
• limit: Maximum number of marks to return
• details: Whether to include the details dict
• hl_name: Whether to include highlight group name instead
of id, true if omitted
• overlap: Also include marks which overlap the range, even
if their start position is less than `start`
• type: Filter marks by type: "highlight", "sign",
"virt_text" and "virt_lines"
Return: ~
List of `[extmark_id, row, col]` tuples in "traversal order".
*nvim_buf_set_extmark()*
nvim_buf_set_extmark({buffer}, {ns_id}, {line}, {col}, {opts})
Creates or updates an |extmark|.
By default a new extmark is created when no id is passed in, but it is
also possible to create a new mark by passing in a previously unused id or
move an existing mark by passing in its id. The caller must then keep
track of existing and unused ids itself. (Useful over RPC, to avoid
waiting for the return value.)
Using the optional arguments, it is possible to use this to highlight a
range of text, and also to associate virtual text to the mark.
If present, the position defined by `end_col` and `end_row` should be
after the start position in order for the extmark to cover a range. An
earlier end position is not an error, but then it behaves like an empty
range (no highlighting).
Parameters: ~
• {buffer} Buffer handle, or 0 for current buffer
• {ns_id} Namespace id from |nvim_create_namespace()|
• {line} Line where to place the mark, 0-based. |api-indexing|
• {col} Column where to place the mark, 0-based. |api-indexing|
• {opts} Optional parameters.
• id : id of the extmark to edit.
• end_row : ending line of the mark, 0-based inclusive.
• end_col : ending col of the mark, 0-based exclusive.
• hl_group : name of the highlight group used to highlight
this mark.
• hl_eol : when true, for a multiline highlight covering the
EOL of a line, continue the highlight for the rest of the
screen line (just like for diff and cursorline highlight).
• virt_text : virtual text to link to this mark. A list of
`[text, highlight]` tuples, each representing a text chunk
with specified highlight. `highlight` element can either
be a single highlight group, or an array of multiple
highlight groups that will be stacked (highest priority
last). A highlight group can be supplied either as a
string or as an integer, the latter which can be obtained
using |nvim_get_hl_id_by_name()|.
• virt_text_pos : position of virtual text. Possible values:
• "eol": right after eol character (default).
• "overlay": display over the specified column, without
shifting the underlying text.
• "right_align": display right aligned in the window.
• "inline": display at the specified column, and shift the
buffer text to the right as needed.
• virt_text_win_col : position the virtual text at a fixed
window column (starting from the first text column of the
screen line) instead of "virt_text_pos".
• virt_text_hide : hide the virtual text when the background
text is selected or hidden because of scrolling with
'nowrap' or 'smoothscroll'. Currently only affects
"overlay" virt_text.
• virt_text_repeat_linebreak : repeat the virtual text on
wrapped lines.
• hl_mode : control how highlights are combined with the
highlights of the text. Currently only affects virt_text
highlights, but might affect `hl_group` in later versions.
• "replace": only show the virt_text color. This is the
default.
• "combine": combine with background text color.
• "blend": blend with background text color. Not supported
for "inline" virt_text.
• virt_lines : virtual lines to add next to this mark This
should be an array over lines, where each line in turn is
an array over `[text, highlight]` tuples. In general,
buffer and window options do not affect the display of the
text. In particular 'wrap' and 'linebreak' options do not
take effect, so the number of extra screen lines will
always match the size of the array. However the 'tabstop'
buffer option is still used for hard tabs. By default
lines are placed below the buffer line containing the
mark.
• virt_lines_above: place virtual lines above instead.
• virt_lines_leftcol: Place extmarks in the leftmost column
of the window, bypassing sign and number columns.
• ephemeral : for use with |nvim_set_decoration_provider()|
callbacks. The mark will only be used for the current
redraw cycle, and not be permantently stored in the
buffer.
• right_gravity : boolean that indicates the direction the
extmark will be shifted in when new text is inserted (true
for right, false for left). Defaults to true.
• end_right_gravity : boolean that indicates the direction
the extmark end position (if it exists) will be shifted in
when new text is inserted (true for right, false for
left). Defaults to false.
• undo_restore : Restore the exact position of the mark if
text around the mark was deleted and then restored by
undo. Defaults to true.
• invalidate : boolean that indicates whether to hide the
extmark if the entirety of its range is deleted. For
hidden marks, an "invalid" key is added to the "details"
array of |nvim_buf_get_extmarks()| and family. If
"undo_restore" is false, the extmark is deleted instead.
• priority: a priority value for the highlight group, sign
attribute or virtual text. For virtual text, item with
highest priority is drawn last. For example treesitter
highlighting uses a value of 100.
• strict: boolean that indicates extmark should not be
placed if the line or column value is past the end of the
buffer or end of the line respectively. Defaults to true.
• sign_text: string of length 1-2 used to display in the
sign column.
• sign_hl_group: name of the highlight group used to
highlight the sign column text.
• number_hl_group: name of the highlight group used to
highlight the number column.
• line_hl_group: name of the highlight group used to
highlight the whole line.
• cursorline_hl_group: name of the highlight group used to
highlight the sign column text when the cursor is on the
same line as the mark and 'cursorline' is enabled.
• conceal: string which should be either empty or a single
character. Enable concealing similar to |:syn-conceal|.
When a character is supplied it is used as |:syn-cchar|.
"hl_group" is used as highlight for the cchar if provided,
otherwise it defaults to |hl-Conceal|.
• spell: boolean indicating that spell checking should be
performed within this extmark
• ui_watched: boolean that indicates the mark should be
drawn by a UI. When set, the UI will receive win_extmark
events. Note: the mark is positioned by virt_text
attributes. Can be used together with virt_text.
• url: A URL to associate with this extmark. In the TUI, the
OSC 8 control sequence is used to generate a clickable
hyperlink to this URL.
• scoped: boolean (EXPERIMENTAL) enables "scoping" for the
extmark. See |nvim__win_add_ns()|
Return: ~
Id of the created/updated extmark
nvim_create_namespace({name}) *nvim_create_namespace()*
Creates a new namespace or gets an existing one. *namespace*
Namespaces are used for buffer highlights and virtual text, see
|nvim_buf_add_highlight()| and |nvim_buf_set_extmark()|.
Namespaces can be named or anonymous. If `name` matches an existing
namespace, the associated id is returned. If `name` is an empty string a
new, anonymous namespace is created.
Parameters: ~
• {name} Namespace name or empty string
Return: ~
Namespace id
nvim_get_namespaces() *nvim_get_namespaces()*
Gets existing, non-anonymous |namespace|s.
Return: ~
dict that maps from names to namespace ids.
*nvim_set_decoration_provider()*
nvim_set_decoration_provider({ns_id}, {opts})
Set or change decoration provider for a |namespace|
This is a very general purpose interface for having Lua callbacks being
triggered during the redraw code.
The expected usage is to set |extmarks| for the currently redrawn buffer.
|nvim_buf_set_extmark()| can be called to add marks on a per-window or
per-lines basis. Use the `ephemeral` key to only use the mark for the
current screen redraw (the callback will be called again for the next
redraw).
Note: this function should not be called often. Rather, the callbacks
themselves can be used to throttle unneeded callbacks. the `on_start`
callback can return `false` to disable the provider until the next redraw.
Similarly, return `false` in `on_win` will skip the `on_lines` calls for
that window (but any extmarks set in `on_win` will still be used). A
plugin managing multiple sources of decoration should ideally only set one
provider, and merge the sources internally. You can use multiple `ns_id`
for the extmarks set/modified inside the callback anyway.
Note: doing anything other than setting extmarks is considered
experimental. Doing things like changing options are not explicitly
forbidden, but is likely to have unexpected consequences (such as 100% CPU
consumption). doing `vim.rpcnotify` should be OK, but `vim.rpcrequest` is
quite dubious for the moment.
Note: It is not allowed to remove or update extmarks in 'on_line'
callbacks.
Attributes: ~
Lua |vim.api| only
Parameters: ~
• {ns_id} Namespace id from |nvim_create_namespace()|
• {opts} Table of callbacks:
• on_start: called first on each screen redraw >
["start", tick]
<
• on_buf: called for each buffer being redrawn (before window
callbacks) >
["buf", bufnr, tick]
<
• on_win: called when starting to redraw a specific window. >
["win", winid, bufnr, topline, botline]
<
• on_line: called for each buffer line being redrawn. (The
interaction with fold lines is subject to change) >
["line", winid, bufnr, row]
<
• on_end: called at the end of a redraw cycle >
["end", tick]
<
nvim__win_add_ns({window}, {ns_id}) *nvim__win_add_ns()*
EXPERIMENTAL: this API will change in the future.
Scopes a namespace to the a window, so extmarks in the namespace will be
active only in the given window.
Parameters: ~
• {window} Window handle, or 0 for current window
• {ns_id} Namespace
Return: ~
true if the namespace was added, else false
nvim__win_del_ns({window}, {ns_id}) *nvim__win_del_ns()*
EXPERIMENTAL: this API will change in the future.
Unscopes a namespace (un-binds it from the given scope).
Parameters: ~
• {window} Window handle, or 0 for current window
• {ns_id} the namespace to remove
Return: ~
true if the namespace was removed, else false
nvim__win_get_ns({window}) *nvim__win_get_ns()*
EXPERIMENTAL: this API will change in the future.
Gets the namespace scopes for a given window.
Parameters: ~
• {window} Window handle, or 0 for current window
Return: ~
a list of namespaces ids
==============================================================================
Window Functions *api-window*
nvim_win_call({window}, {fun}) *nvim_win_call()*
Calls a function with window as temporary current window.
Attributes: ~
Lua |vim.api| only
Parameters: ~
• {window} Window handle, or 0 for current window
• {fun} Function to call inside the window (currently Lua callable
only)
Return: ~
Return value of function.
See also: ~
• |win_execute()|
• |nvim_buf_call()|
nvim_win_close({window}, {force}) *nvim_win_close()*
Closes the window (like |:close| with a |window-ID|).
Attributes: ~
not allowed when |textlock| is active
Parameters: ~
• {window} Window handle, or 0 for current window
• {force} Behave like `:close!` The last window of a buffer with
unwritten changes can be closed. The buffer will become
hidden, even if 'hidden' is not set.
nvim_win_del_var({window}, {name}) *nvim_win_del_var()*
Removes a window-scoped (w:) variable
Parameters: ~
• {window} Window handle, or 0 for current window
• {name} Variable name
nvim_win_get_buf({window}) *nvim_win_get_buf()*
Gets the current buffer in a window
Parameters: ~
• {window} Window handle, or 0 for current window
Return: ~
Buffer handle
nvim_win_get_cursor({window}) *nvim_win_get_cursor()*
Gets the (1,0)-indexed, buffer-relative cursor position for a given window
(different windows showing the same buffer have independent cursor
positions). |api-indexing|
Parameters: ~
• {window} Window handle, or 0 for current window
Return: ~
(row, col) tuple
See also: ~
• |getcurpos()|
nvim_win_get_height({window}) *nvim_win_get_height()*
Gets the window height
Parameters: ~
• {window} Window handle, or 0 for current window
Return: ~
Height as a count of rows
nvim_win_get_number({window}) *nvim_win_get_number()*
Gets the window number
Parameters: ~
• {window} Window handle, or 0 for current window
Return: ~
Window number
nvim_win_get_position({window}) *nvim_win_get_position()*
Gets the window position in display cells. First position is zero.
Parameters: ~
• {window} Window handle, or 0 for current window
Return: ~
(row, col) tuple with the window position
nvim_win_get_tabpage({window}) *nvim_win_get_tabpage()*
Gets the window tabpage
Parameters: ~
• {window} Window handle, or 0 for current window
Return: ~
Tabpage that contains the window
nvim_win_get_var({window}, {name}) *nvim_win_get_var()*
Gets a window-scoped (w:) variable
Parameters: ~
• {window} Window handle, or 0 for current window
• {name} Variable name
Return: ~
Variable value
nvim_win_get_width({window}) *nvim_win_get_width()*
Gets the window width
Parameters: ~
• {window} Window handle, or 0 for current window
Return: ~
Width as a count of columns
nvim_win_hide({window}) *nvim_win_hide()*
Closes the window and hide the buffer it contains (like |:hide| with a
|window-ID|).
Like |:hide| the buffer becomes hidden unless another window is editing
it, or 'bufhidden' is `unload`, `delete` or `wipe` as opposed to |:close|
or |nvim_win_close()|, which will close the buffer.
Attributes: ~
not allowed when |textlock| is active
Parameters: ~
• {window} Window handle, or 0 for current window
nvim_win_is_valid({window}) *nvim_win_is_valid()*
Checks if a window is valid
Parameters: ~
• {window} Window handle, or 0 for current window
Return: ~
true if the window is valid, false otherwise
nvim_win_set_buf({window}, {buffer}) *nvim_win_set_buf()*
Sets the current buffer in a window, without side effects
Attributes: ~
not allowed when |textlock| is active
Parameters: ~
• {window} Window handle, or 0 for current window
• {buffer} Buffer handle
nvim_win_set_cursor({window}, {pos}) *nvim_win_set_cursor()*
Sets the (1,0)-indexed cursor position in the window. |api-indexing| This
scrolls the window even if it is not the current one.
Parameters: ~
• {window} Window handle, or 0 for current window
• {pos} (row, col) tuple representing the new position
nvim_win_set_height({window}, {height}) *nvim_win_set_height()*
Sets the window height.
Parameters: ~
• {window} Window handle, or 0 for current window
• {height} Height as a count of rows
nvim_win_set_hl_ns({window}, {ns_id}) *nvim_win_set_hl_ns()*
Set highlight namespace for a window. This will use highlights defined
with |nvim_set_hl()| for this namespace, but fall back to global
highlights (ns=0) when missing.
This takes precedence over the 'winhighlight' option.
Parameters: ~
• {ns_id} the namespace to use
nvim_win_set_var({window}, {name}, {value}) *nvim_win_set_var()*
Sets a window-scoped (w:) variable
Parameters: ~
• {window} Window handle, or 0 for current window
• {name} Variable name
• {value} Variable value
nvim_win_set_width({window}, {width}) *nvim_win_set_width()*
Sets the window width. This will only succeed if the screen is split
vertically.
Parameters: ~
• {window} Window handle, or 0 for current window
• {width} Width as a count of columns
nvim_win_text_height({window}, {opts}) *nvim_win_text_height()*
Computes the number of screen lines occupied by a range of text in a given
window. Works for off-screen text and takes folds into account.
Diff filler or virtual lines above a line are counted as a part of that
line, unless the line is on "start_row" and "start_vcol" is specified.
Diff filler or virtual lines below the last buffer line are counted in the
result when "end_row" is omitted.
Line indexing is similar to |nvim_buf_get_text()|.
Parameters: ~
• {window} Window handle, or 0 for current window.
• {opts} Optional parameters:
• start_row: Starting line index, 0-based inclusive. When
omitted start at the very top.
• end_row: Ending line index, 0-based inclusive. When
omitted end at the very bottom.
• start_vcol: Starting virtual column index on "start_row",
0-based inclusive, rounded down to full screen lines. When
omitted include the whole line.
• end_vcol: Ending virtual column index on "end_row",
0-based exclusive, rounded up to full screen lines. When
omitted include the whole line.
Return: ~
Dictionary containing text height information, with these keys:
• all: The total number of screen lines occupied by the range.
• fill: The number of diff filler or virtual lines among them.
See also: ~
• |virtcol()| for text width.
==============================================================================
Win_config Functions *api-win_config*
nvim_open_win({buffer}, {enter}, {config}) *nvim_open_win()*
Opens a new split window, or a floating window if `relative` is specified,
or an external window (managed by the UI) if `external` is specified.
Floats are windows that are drawn above the split layout, at some anchor
position in some other window. Floats can be drawn internally or by
external GUI with the |ui-multigrid| extension. External windows are only
supported with multigrid GUIs, and are displayed as separate top-level
windows.
For a general overview of floats, see |api-floatwin|.
The `width` and `height` of the new window must be specified when opening
a floating window, but are optional for normal windows.
If `relative` and `external` are omitted, a normal "split" window is
created. The `win` property determines which window will be split. If no
`win` is provided or `win == 0`, a window will be created adjacent to the
current window. If -1 is provided, a top-level split will be created.
`vertical` and `split` are only valid for normal windows, and are used to
control split direction. For `vertical`, the exact direction is determined
by |'splitright'| and |'splitbelow'|. Split windows cannot have
`bufpos`/`row`/`col`/`border`/`title`/`footer` properties.
With relative=editor (row=0,col=0) refers to the top-left corner of the
screen-grid and (row=Lines-1,col=Columns-1) refers to the bottom-right
corner. Fractional values are allowed, but the builtin implementation
(used by non-multigrid UIs) will always round down to nearest integer.
Out-of-bounds values, and configurations that make the float not fit
inside the main editor, are allowed. The builtin implementation truncates
values so floats are fully within the main screen grid. External GUIs
could let floats hover outside of the main window like a tooltip, but this
should not be used to specify arbitrary WM screen positions.
Example (Lua): window-relative float >lua
vim.api.nvim_open_win(0, false,
{relative='win', row=3, col=3, width=12, height=3})
<
Example (Lua): buffer-relative float (travels as buffer is scrolled) >lua
vim.api.nvim_open_win(0, false,
{relative='win', width=12, height=3, bufpos={100,10}})
<
Example (Lua): vertical split left of the current window >lua
vim.api.nvim_open_win(0, false, {
split = 'left',
win = 0
})
<
Attributes: ~
not allowed when |textlock| is active
Parameters: ~
• {buffer} Buffer to display, or 0 for current buffer
• {enter} Enter the window (make it the current window)
• {config} Map defining the window configuration. Keys:
• relative: Sets the window layout to "floating", placed at
(row,col) coordinates relative to:
• "editor" The global editor grid
• "win" Window given by the `win` field, or current
window.
• "cursor" Cursor position in current window.
• "mouse" Mouse position
• win: |window-ID| window to split, or relative window when
creating a float (relative="win").
• anchor: Decides which corner of the float to place at
(row,col):
• "NW" northwest (default)
• "NE" northeast
• "SW" southwest
• "SE" southeast
• width: Window width (in character cells). Minimum of 1.
• height: Window height (in character cells). Minimum of 1.
• bufpos: Places float relative to buffer text (only when
relative="win"). Takes a tuple of zero-indexed
`[line, column]`. `row` and `col` if given are applied
relative to this position, else they default to:
• `row=1` and `col=0` if `anchor` is "NW" or "NE"
• `row=0` and `col=0` if `anchor` is "SW" or "SE" (thus
like a tooltip near the buffer text).
• row: Row position in units of "screen cell height", may be
fractional.
• col: Column position in units of "screen cell width", may
be fractional.
• focusable: Enable focus by user actions (wincmds, mouse
events). Defaults to true. Non-focusable windows can be
entered by |nvim_set_current_win()|.
• external: GUI should display the window as an external
top-level window. Currently accepts no other positioning
configuration together with this.
• zindex: Stacking order. floats with higher `zindex` go on
top on floats with lower indices. Must be larger than
zero. The following screen elements have hard-coded
z-indices:
• 100: insert completion popupmenu
• 200: message scrollback
• 250: cmdline completion popupmenu (when
wildoptions+=pum) The default value for floats are 50.
In general, values below 100 are recommended, unless
there is a good reason to overshadow builtin elements.
• style: (optional) Configure the appearance of the window.
Currently only supports one value:
• "minimal" Nvim will display the window with many UI
options disabled. This is useful when displaying a
temporary float where the text should not be edited.
Disables 'number', 'relativenumber', 'cursorline',
'cursorcolumn', 'foldcolumn', 'spell' and 'list'
options. 'signcolumn' is changed to `auto` and
'colorcolumn' is cleared. 'statuscolumn' is changed to
empty. The end-of-buffer region is hidden by setting
`eob` flag of 'fillchars' to a space char, and clearing
the |hl-EndOfBuffer| region in 'winhighlight'.
• border: Style of (optional) window border. This can either
be a string or an array. The string values are
• "none": No border (default).
• "single": A single line box.
• "double": A double line box.
• "rounded": Like "single", but with rounded corners
("╭" etc.).
• "solid": Adds padding by a single whitespace cell.
• "shadow": A drop shadow effect by blending with the
background.
• If it is an array, it should have a length of eight or
any divisor of eight. The array will specify the eight
chars building up the border in a clockwise fashion
starting with the top-left corner. As an example, the
double box style could be specified as: >
[ "╔", "═" ,"╗", "║", "╝", "═", "╚", "║" ].
<
If the number of chars are less than eight, they will be
repeated. Thus an ASCII border could be specified as >
[ "/", "-", \"\\\\\", "|" ],
<
or all chars the same as >
[ "x" ].
<
An empty string can be used to turn off a specific border,
for instance, >
[ "", "", "", ">", "", "", "", "<" ]
<
will only make vertical borders but not horizontal ones.
By default, `FloatBorder` highlight is used, which links
to `WinSeparator` when not defined. It could also be
specified by character: >
[ ["+", "MyCorner"], ["x", "MyBorder"] ].
<
• title: Title (optional) in window border, string or list.
List should consist of `[text, highlight]` tuples. If
string, the default highlight group is `FloatTitle`.
• title_pos: Title position. Must be set with `title`
option. Value can be one of "left", "center", or "right".
Default is `"left"`.
• footer: Footer (optional) in window border, string or
list. List should consist of `[text, highlight]` tuples.
If string, the default highlight group is `FloatFooter`.
• footer_pos: Footer position. Must be set with `footer`
option. Value can be one of "left", "center", or "right".
Default is `"left"`.
• noautocmd: If true then all autocommands are blocked for
the duration of the call.
• fixed: If true when anchor is NW or SW, the float window
would be kept fixed even if the window would be truncated.
• hide: If true the floating window will be hidden.
• vertical: Split vertically |:vertical|.
• split: Split direction: "left", "right", "above", "below".
Return: ~
Window handle, or 0 on error
nvim_win_get_config({window}) *nvim_win_get_config()*
Gets window configuration.
The returned value may be given to |nvim_open_win()|.
`relative` is empty for normal windows.
Parameters: ~
• {window} Window handle, or 0 for current window
Return: ~
Map defining the window configuration, see |nvim_open_win()|
nvim_win_set_config({window}, {config}) *nvim_win_set_config()*
Configures window layout. Cannot be used to move the last window in a
tabpage to a different one.
When reconfiguring a window, absent option keys will not be changed.
`row`/`col` and `relative` must be reconfigured together.
Parameters: ~
• {window} Window handle, or 0 for current window
• {config} Map defining the window configuration, see |nvim_open_win()|
See also: ~
• |nvim_open_win()|
==============================================================================
Tabpage Functions *api-tabpage*
nvim_tabpage_del_var({tabpage}, {name}) *nvim_tabpage_del_var()*
Removes a tab-scoped (t:) variable
Parameters: ~
• {tabpage} Tabpage handle, or 0 for current tabpage
• {name} Variable name
nvim_tabpage_get_number({tabpage}) *nvim_tabpage_get_number()*
Gets the tabpage number
Parameters: ~
• {tabpage} Tabpage handle, or 0 for current tabpage
Return: ~
Tabpage number
nvim_tabpage_get_var({tabpage}, {name}) *nvim_tabpage_get_var()*
Gets a tab-scoped (t:) variable
Parameters: ~
• {tabpage} Tabpage handle, or 0 for current tabpage
• {name} Variable name
Return: ~
Variable value
nvim_tabpage_get_win({tabpage}) *nvim_tabpage_get_win()*
Gets the current window in a tabpage
Parameters: ~
• {tabpage} Tabpage handle, or 0 for current tabpage
Return: ~
Window handle
nvim_tabpage_is_valid({tabpage}) *nvim_tabpage_is_valid()*
Checks if a tabpage is valid
Parameters: ~
• {tabpage} Tabpage handle, or 0 for current tabpage
Return: ~
true if the tabpage is valid, false otherwise
nvim_tabpage_list_wins({tabpage}) *nvim_tabpage_list_wins()*
Gets the windows in a tabpage
Parameters: ~
• {tabpage} Tabpage handle, or 0 for current tabpage
Return: ~
List of windows in `tabpage`
*nvim_tabpage_set_var()*
nvim_tabpage_set_var({tabpage}, {name}, {value})
Sets a tab-scoped (t:) variable
Parameters: ~
• {tabpage} Tabpage handle, or 0 for current tabpage
• {name} Variable name
• {value} Variable value
nvim_tabpage_set_win({tabpage}, {win}) *nvim_tabpage_set_win()*
Sets the current window in a tabpage
Parameters: ~
• {tabpage} Tabpage handle, or 0 for current tabpage
• {win} Window handle, must already belong to {tabpage}
==============================================================================
Autocmd Functions *api-autocmd*
nvim_clear_autocmds({opts}) *nvim_clear_autocmds()*
Clears all autocommands selected by {opts}. To delete autocmds see
|nvim_del_autocmd()|.
Parameters: ~
• {opts} Parameters
• event: (string|table) Examples:
• event: "pat1"
• event: { "pat1" }
• event: { "pat1", "pat2", "pat3" }
• pattern: (string|table)
• pattern or patterns to match exactly.
• For example, if you have `*.py` as that pattern for the
autocmd, you must pass `*.py` exactly to clear it.
`test.py` will not match the pattern.
• defaults to clearing all patterns.
• NOTE: Cannot be used with {buffer}
• buffer: (bufnr)
• clear only |autocmd-buflocal| autocommands.
• NOTE: Cannot be used with {pattern}
• group: (string|int) The augroup name or id.
• NOTE: If not passed, will only delete autocmds not in any
group.
nvim_create_augroup({name}, {opts}) *nvim_create_augroup()*
Create or get an autocommand group |autocmd-groups|.
To get an existing group id, do: >lua
local id = vim.api.nvim_create_augroup("MyGroup", {
clear = false
})
<
Parameters: ~
• {name} String: The name of the group
• {opts} Dictionary Parameters
• clear (bool) optional: defaults to true. Clear existing
commands if the group already exists |autocmd-groups|.
Return: ~
Integer id of the created group.
See also: ~
• |autocmd-groups|
nvim_create_autocmd({event}, {opts}) *nvim_create_autocmd()*
Creates an |autocommand| event handler, defined by `callback` (Lua
function or Vimscript function name string) or `command` (Ex command
string).
Example using Lua callback: >lua
vim.api.nvim_create_autocmd({"BufEnter", "BufWinEnter"}, {
pattern = {"*.c", "*.h"},
callback = function(ev)
print(string.format('event fired: %s', vim.inspect(ev)))
end
})
<
Example using an Ex command as the handler: >lua
vim.api.nvim_create_autocmd({"BufEnter", "BufWinEnter"}, {
pattern = {"*.c", "*.h"},
command = "echo 'Entering a C or C++ file'",
})
<
Note: `pattern` is NOT automatically expanded (unlike with |:autocmd|),
thus names like "$HOME" and "~" must be expanded explicitly: >lua
pattern = vim.fn.expand("~") .. "/some/path/*.py"
<
Parameters: ~
• {event} (string|array) Event(s) that will trigger the handler
(`callback` or `command`).
• {opts} Options dict:
• group (string|integer) optional: autocommand group name or
id to match against.
• pattern (string|array) optional: pattern(s) to match
literally |autocmd-pattern|.
• buffer (integer) optional: buffer number for buffer-local
autocommands |autocmd-buflocal|. Cannot be used with
{pattern}.
• desc (string) optional: description (for documentation and
troubleshooting).
• callback (function|string) optional: Lua function (or
Vimscript function name, if string) called when the
event(s) is triggered. Lua callback can return a truthy
value (not `false` or `nil`) to delete the autocommand.
Receives one argument, a table with these keys:
*event-args*
• id: (number) autocommand id
• event: (string) name of the triggered event
|autocmd-events|
• group: (number|nil) autocommand group id, if any
• match: (string) expanded value of <amatch>
• buf: (number) expanded value of <abuf>
• file: (string) expanded value of <afile>
• data: (any) arbitrary data passed from
|nvim_exec_autocmds()| *event-data*
• command (string) optional: Vim command to execute on event.
Cannot be used with {callback}
• once (boolean) optional: defaults to false. Run the
autocommand only once |autocmd-once|.
• nested (boolean) optional: defaults to false. Run nested
autocommands |autocmd-nested|.
Return: ~
Autocommand id (number)
See also: ~
• |autocommand|
• |nvim_del_autocmd()|
nvim_del_augroup_by_id({id}) *nvim_del_augroup_by_id()*
Delete an autocommand group by id.
To get a group id one can use |nvim_get_autocmds()|.
NOTE: behavior differs from |:augroup-delete|. When deleting a group,
autocommands contained in this group will also be deleted and cleared.
This group will no longer exist.
Parameters: ~
• {id} Integer The id of the group.
See also: ~
• |nvim_del_augroup_by_name()|
• |nvim_create_augroup()|
nvim_del_augroup_by_name({name}) *nvim_del_augroup_by_name()*
Delete an autocommand group by name.
NOTE: behavior differs from |:augroup-delete|. When deleting a group,
autocommands contained in this group will also be deleted and cleared.
This group will no longer exist.
Parameters: ~
• {name} String The name of the group.
See also: ~
• |autocmd-groups|
nvim_del_autocmd({id}) *nvim_del_autocmd()*
Deletes an autocommand by id.
Parameters: ~
• {id} Integer Autocommand id returned by |nvim_create_autocmd()|
nvim_exec_autocmds({event}, {opts}) *nvim_exec_autocmds()*
Execute all autocommands for {event} that match the corresponding {opts}
|autocmd-execute|.
Parameters: ~
• {event} (String|Array) The event or events to execute
• {opts} Dictionary of autocommand options:
• group (string|integer) optional: the autocommand group name
or id to match against. |autocmd-groups|.
• pattern (string|array) optional: defaults to "*"
|autocmd-pattern|. Cannot be used with {buffer}.
• buffer (integer) optional: buffer number
|autocmd-buflocal|. Cannot be used with {pattern}.
• modeline (bool) optional: defaults to true. Process the
modeline after the autocommands <nomodeline>.
• data (any): arbitrary data to send to the autocommand
callback. See |nvim_create_autocmd()| for details.
See also: ~
• |:doautocmd|
nvim_get_autocmds({opts}) *nvim_get_autocmds()*
Get all autocommands that match the corresponding {opts}.
These examples will get autocommands matching ALL the given criteria: >lua
-- Matches all criteria
autocommands = vim.api.nvim_get_autocmds({
group = "MyGroup",
event = {"BufEnter", "BufWinEnter"},
pattern = {"*.c", "*.h"}
})
-- All commands from one group
autocommands = vim.api.nvim_get_autocmds({
group = "MyGroup",
})
<
NOTE: When multiple patterns or events are provided, it will find all the
autocommands that match any combination of them.
Parameters: ~
• {opts} Dictionary with at least one of the following:
• group (string|integer): the autocommand group name or id to
match against.
• event (string|array): event or events to match against
|autocmd-events|.
• pattern (string|array): pattern or patterns to match against
|autocmd-pattern|. Cannot be used with {buffer}
• buffer: Buffer number or list of buffer numbers for buffer
local autocommands |autocmd-buflocal|. Cannot be used with
{pattern}
Return: ~
Array of autocommands matching the criteria, with each item containing
the following fields:
• id (number): the autocommand id (only when defined with the API).
• group (integer): the autocommand group id.
• group_name (string): the autocommand group name.
• desc (string): the autocommand description.
• event (string): the autocommand event.
• command (string): the autocommand command. Note: this will be empty
if a callback is set.
• callback (function|string|nil): Lua function or name of a Vim script
function which is executed when this autocommand is triggered.
• once (boolean): whether the autocommand is only run once.
• pattern (string): the autocommand pattern. If the autocommand is
buffer local |autocmd-buffer-local|:
• buflocal (boolean): true if the autocommand is buffer local.
• buffer (number): the buffer number.
==============================================================================
UI Functions *api-ui*
nvim_ui_attach({width}, {height}, {options}) *nvim_ui_attach()*
Activates UI events on the channel.
Entry point of all UI clients. Allows |--embed| to continue startup.
Implies that the client is ready to show the UI. Adds the client to the
list of UIs. |nvim_list_uis()|
Note: ~
• If multiple UI clients are attached, the global screen dimensions
degrade to the smallest client. E.g. if client A requests 80x40 but
client B requests 200x100, the global screen has size 80x40.
Attributes: ~
|RPC| only
Parameters: ~
• {width} Requested screen columns
• {height} Requested screen rows
• {options} |ui-option| map
nvim_ui_detach() *nvim_ui_detach()*
Deactivates UI events on the channel.
Removes the client from the list of UIs. |nvim_list_uis()|
Attributes: ~
|RPC| only
*nvim_ui_pum_set_bounds()*
nvim_ui_pum_set_bounds({width}, {height}, {row}, {col})
Tells Nvim the geometry of the popupmenu, to align floating windows with
an external popup menu.
Note that this method is not to be confused with
|nvim_ui_pum_set_height()|, which sets the number of visible items in the
popup menu, while this function sets the bounding box of the popup menu,
including visual elements such as borders and sliders. Floats need not use
the same font size, nor be anchored to exact grid corners, so one can set
floating-point numbers to the popup menu geometry.
Attributes: ~
|RPC| only
Parameters: ~
• {width} Popupmenu width.
• {height} Popupmenu height.
• {row} Popupmenu row.
• {col} Popupmenu height.
nvim_ui_pum_set_height({height}) *nvim_ui_pum_set_height()*
Tells Nvim the number of elements displaying in the popupmenu, to decide
<PageUp> and <PageDown> movement.
Attributes: ~
|RPC| only
Parameters: ~
• {height} Popupmenu height, must be greater than zero.
nvim_ui_set_focus({gained}) *nvim_ui_set_focus()*
Tells the nvim server if focus was gained or lost by the GUI
Attributes: ~
|RPC| only
nvim_ui_set_option({name}, {value}) *nvim_ui_set_option()*
Attributes: ~
|RPC| only
nvim_ui_term_event({event}, {value}) *nvim_ui_term_event()*
Tells Nvim when a terminal event has occurred
The following terminal events are supported:
• "termresponse": The terminal sent an OSC or DCS response sequence to
Nvim. The payload is the received response. Sets |v:termresponse| and
fires |TermResponse|.
Attributes: ~
|RPC| only
Parameters: ~
• {event} Event name
• {value} Event payload
nvim_ui_try_resize({width}, {height}) *nvim_ui_try_resize()*
Attributes: ~
|RPC| only
*nvim_ui_try_resize_grid()*
nvim_ui_try_resize_grid({grid}, {width}, {height})
Tell Nvim to resize a grid. Triggers a grid_resize event with the
requested grid size or the maximum size if it exceeds size limits.
On invalid grid handle, fails with error.
Attributes: ~
|RPC| only
Parameters: ~
• {grid} The handle of the grid to be changed.
• {width} The new requested width.
• {height} The new requested height.
vim:tw=78:ts=8:sw=4:sts=4:et:ft=help:norl:
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