--- *mini.cmdline* Command line tweaks

---

--- MIT License Copyright (c) 2025 Evgeni Chasnovski

--- Features:

---

--- - Autocomplete with customizable delay. Enhances |cmdline-completion| and

--- manual |'wildchar'| pressing experience.

--- Requires Neovim>=0.11, though Neovim>=0.12 is recommended.

---

--- - Autocorrect words as-you-type. Only words that must come from a fixed set of

--- candidates (like commands and options) are autocorrected by default.

---

--- - Autopeek command range as-you-type. Shows a floating window with range lines

--- along with customizable context lines.

---

--- What it doesn't do:

---

--- - Customization of command line UI. Use |vim._extui| (on Neovim>=0.12).

---

--- - Customization of autocompletion candidates. They are computed

--- via |cmdline-completion|.

---

--- # Setup ~

---

--- This module needs a setup with `require('mini.cmdline').setup({})` (replace `{}`

--- with your `config` table). It will create global Lua table `MiniCmdline` which

--- you can use for scripting or manually (with `:lua MiniCmdline.*`).

---

--- See |MiniCmdline.config| for `config` structure and default values.

---

--- You can override runtime config settings locally to buffer inside

--- `vim.b.minicmdline_config` which should have same structure as

--- `MiniCmdline.config`. See |mini.nvim-buffer-local-config| for more details.

---

--- # Suggested option values ~

---

--- Some options are set automatically (if not set before |MiniCmdline.setup()|):

--- - |'wildmode'| is set to "noselect,full" for less intrusive autocompletion.

--- Requires Neovim>=0.11 and enabled `config.autocomplete`.

--- - |'wildoptions'| is set to "pum,fuzzy" to enable fuzzy matching.

---

--- # Comparisons ~

---

--- - [folke/noice.nvim](https://github.com/folke/noice.nvim):

--- - Mostly focuses on visual aspects of the Command line.

--- This modules is aimed to improve its workflow without changing UI.

---

--- - [nacro90/numb.nvim](https://github.com/nacro90/numb.nvim):

--- - Designed to preview only a single line range defined by numbers.

--- This module handles any form of |:range| and |:range-offset| for both

--- one and two line ranges.

--- - Shows target line directly in the normal window.

--- This module uses a dedicated floating window.

---

--- - Built-in |cmdline-autocompletion| (on Neovim>=0.12):

--- - This module on Neovim>=0.12 uses that as its base for autocompletion.

--- Ont top of that it also provides customizable delay and predicate.

---

--- - Built-in |vim._extui| (on Neovim>=0.12):

--- - Mostly focuses on visual aspects of the Command line.

--- This modules is aimed to improve its workflow without changing UI.

---

--- # Highlight groups ~

---

--- - `MiniCmdlinePeekBorder` - border of autopeek window.

--- - `MiniCmdlinePeekLineNr` - line numbers in autopeek window.

--- - `MiniCmdlinePeekNormal` - basic foreground/background of autopeek window.

--- - `MiniCmdlinePeekSep` - statuscolumn separator in autopeek window.

--- - `MiniCmdlinePeekSign` - signs in autopeek window.

--- - `MiniCmdlinePeekTitle` - title of autopeek window.

---

--- # Disabling ~

---

--- To disable acting in mappings, set `vim.g.minicmdline_disable` (globally) or

--- `vim.b.minicmdline_disable` (for a buffer) to `true`. Considering high number

--- of different scenarios and customization intentions, writing exact rules

--- for disabling module's functionality is left to user.

--- See |mini.nvim-disabling-recipes| for common recipes.

---@tag MiniCmdline

---@diagnostic disable:undefined-field

---@diagnostic disable:discard-returns

---@diagnostic disable:unused-local

-- Module definition ==========================================================

local MiniCmdline = {}

local H = {}

--- Module setup

---

---@param config table|nil Module config table. See |MiniCmdline.config|.

---

---@usage >lua

--- require('mini.cmdline').setup() -- use default config

--- -- OR

--- require('mini.cmdline').setup({}) -- replace {} with your config table

--- <

MiniCmdline.setup = function(config)

-- Export module

_G.MiniCmdline = MiniCmdline

-- Setup config

config = H.setup_config(config)

-- Apply config

H.apply_config(config)

-- Define behavior

H.create_autocommands()

-- Create default highlighting

H.create_default_hl()

end

--- Defaults ~

---@eval return MiniDoc.afterlines_to_code(MiniDoc.current.eval_section)

---@text # General ~

---

--- - Each feature is configured via separate table.

--- - Use `enable = false` to disable a feature.

---

---# Autocomplete ~

---

--- `config.autocomplete` is used to configure autocompletion: automatic show

--- of |'wildmenu'|.

---

--- `autocomplete.delay` defines a (debounce style) delay after which |'wildchar'|

--- is triggered to show wildmenu.

--- Default: 0. Note: Neovim>=0.12 is recommended for positive values if you

--- want to reduce flicker (thanks to |wildtrigger()|).

---

--- `autocomplete.predicate` defines a condition of whether to trigger completion

--- at the current command line state. Takes a table with input data and should

--- return `true` to show completion and `false` otherwise. Will be called before

--- the possible delay at current command line state.

--- Default: |MiniCmdline.default_autocomplete_predicate()|.

---

--- Input data fields:

--- - <line> `(string)` - current command line text. See |getcmdline()|.

--- - <pos> `(number)` - current command line column. See |getcmdpos()|.

--- - <line_prev> `(string)` - command line text before the latest change.

--- - <pos_prev> `(number)` - command line column before the latest cursor move.

---

--- Example of blocking completion based on completion type (as some may be slow): >lua

---

--- local block_compltype = { shellcmd = true }

--- require('mini.cmdline').setup({

--- autocomplete = {

--- predicate = function()

--- return not block_compltype[vim.fn.getcmdcompltype()]

--- end,

--- },

--- })

--- <

--- Similar approach can be used to enable completion only for normal Ex commands.

--- Use `return vim.fn.getcmdtype() == ':'` as a predicate output.

---

---# Autocorrect ~

---

--- `config.autocorrect` is used to configure autocorrection: automatic adjustment

--- of bad words as you type them. This works only when appending single character

--- at the end of the command line. Editing already typed words does not trigger

--- autocorrect (allows correcting the autocorrection).

---

--- When to autocorrect is computed automatically based on |getcmdcomplpat()| after

--- every key press: if it doesn't add the character to completion pattern, then

--- the pattern before the key press is attempted to be corrected.

--- There is also an autocorrection attempt for the last word just before

--- executing the command.

---

--- Notes:

--- - This is intended mostly for fixing typos and not as a shortcut for fuzzy

--- matching. Performing the latter automatically is too intrusive. Explicitly

--- use fuzzy completion for that (set up by default).

---

--- - Default autocorrection is done only for words that must come from a fixed

--- set of candidates (like commands and options) by choosing the one with

--- the lowest string distance.

--- See |MiniCmdline.default_autocorrect_func()| for details.

---

--- - Word that matches some Command-line |abbreviation| is not autocorrected.

---

--- - If current command expects only a single argument (like |:colorscheme|), then

--- autocorrection will happen only just before executing the command.

---

--- `autocorrect.func` is a function that can be used to customize autocorrection.

--- Takes a table with input data and should return a string with the correct word

--- or `nil` for no autocorrection. Default: |MiniCmdline.default_autocorrect_func()|.

---

--- Input data fields:

--- - <word> `(string)` - word to be autocorrected. Never empty string.

--- - <type> `(string)` - word type. Output of |getcmdcompltype()|.

---

---# Autopeek ~

---

--- `config.autopeek` is used to configure automatic peeking: show command's target

--- range in a floating window. The window will appear above command line and show

--- current buffer with the focus on left and right (if present and differs from

--- left) range lines.

---

--- `autopeek.n_context` defines how many lines to show above and below the target.

--- The range itself is visualized by default with the statuscolumn signs.

--- Default: 1.

---

--- `autopeek.predicate` defines a condition of whether to show peek window at

--- the current command line state. Takes a table with input data and should

--- return `true` to peek and `false` otherwise.

--- Will be called only if it is possible to parse range from the current command

--- line text and it is for buffer lines (no command or |:command-addr| is `lines`)

--- Default: |MiniCmdline.default_autopeek_predicate()|.

---

--- Input data fields:

--- - <left> `(number)` - left range edge. Not necessarily smallest.

--- - <right> `(number)` - right range edge. Same as `left` for a single line range.

--- - <cmd> `(string)` - full command name. Can be empty string if no valid

--- command is (yet) entered.

---

--- `autopeek.window` defines behavior of a peek window.

--- `autopeek.window.config` is a table defining floating window characteristics

--- or a callable returning such table.

--- It should have the same structure as in |nvim_open_win()|.

---

--- `autopeek.window.statuscolumn` is a special function that can be used to

--- customize |'statuscolumn'| value for the peek window. Takes a table with input

--- data and should return a string to display for line |v:lnum|.

--- Default: |MiniCmdline.default_autopeek_statuscolumn()|.

--- Input data fields are the same as for `autopeek.predicate`.

---

--- Example of showing `<` and `>` signs on range lines: >lua

---

--- function(data)

--- local n, l, r = vim.v.lnum, data.left, data.right

--- local s = n == l and (n == r and '* ' or '< ') or n == r and '> ' or ''

--- -- Needs explicit highlighting via `:h 'statusline'` syntax

--- return '%#MiniCmdlinePeekSign#' .. s

--- end

--- <

--- Notes:

--- - Peek window directly shows current buffer, which means that all its

--- extmarks, virtual text, virtual lines, etc. are also shown.

--- - Non-zero context might work unreliably if there are virtual lines.

--- - Peeking intentionally hides Visual selection if Command-line mode is entered

--- directly from it. Peeking `'<,'>` range already visualizes the selection.

--- To disable autopeek for this case, add the following code BEFORE

--- executing `require('mini.cmdline').setup()`: >lua

---

--- local disable = vim.schedule_wrap(function()

--- local is_from_visual = vim.startswith(vim.fn.getcmdline(), "'<,'>")

--- MiniCmdline.config.autopeek.enable = not is_from_visual

--- end)

--- local reenable = function() MiniCmdline.config.autopeek.enable = true end

---

--- vim.api.nvim_create_autocmd('CmdlineEnter', { callback = disable })

--- vim.api.nvim_create_autocmd('CmdlineLeave', { callback = reenable })

--- <

MiniCmdline.config = {

-- Autocompletion: show `:h 'wildmenu'` as you type

autocomplete = {

enable = true,

-- Delay (in ms) after which to trigger completion

-- Neovim>=0.12 is recommended for positive values

delay = 0,

-- Custom rule of when to trigger completion

predicate = nil,

-- Whether to map arrow keys for more consistent wildmenu behavior

map_arrows = true,

},

-- Autocorrection: adjust non-existing words (commands, options, etc.)

autocorrect = {

enable = true,

-- Custom autocorrection rule

func = nil,

},

-- Autopeek: show command's target range in a floating window

autopeek = {

enable = true,

-- Number of lines to show above and below range lines

n_context = 1,

-- Custom rule of when to show peek window

predicate = nil,

-- Window options

window = {

-- Floating window config

config = {},

-- Function to render statuscolumn

statuscolumn = nil,

},

},

}

--minidoc_afterlines_end

--- Default autocompletion predicate

---

---@param data table Input autocompletion data. As described in |MiniCmdline.config|.

---@param opts table|nil Options. Reserved for future use.

---

---@return boolean If command line does not (yet) contain a letter - `false`,

--- otherwise - `true`. This makes autopeek easier to use for a numerical range.

MiniCmdline.default_autocomplete_predicate = function(data, opts) return data.line:find('%a') ~= nil end

--- Default autocorrection function

---

--- - Return input word if `opts.strict_type=true` and input `type` is not proper.

--- - Get candidates via `opts.get_candidates()`.

--- Default: mostly via |getcompletion()| with empty pattern and input `type`.

--- Exceptions are `help` and `option` types: both list all available candidates

--- in their own ways.

--- - Choose the candidate with the lowest Damerau–Levenshtein distance

--- (smallest number of deletion/insertion/substitution/transposition needed

--- to transform one word into another; slightly prefers transposition).

--- Notes:

--- - Type `'command'` also chooses from all valid candidate abbreviations.

--- - Comparison is done both respecting and ignoring case.

---

---@param data table Input autocorrection data. As described in |MiniCmdline.config|.

---@param opts table|nil Options. Possible fields:

--- - <strict_type> `(boolean)` - whether to restrict output only for types which

--- must have words from a fixed set of candidates (like command or option

--- names). Note: does not include `help` type since |:help| already has

--- "sophisticated algorithm" to handle typos. Default: `true`.

--- - <get_candidates> `(function)` - source of candidates. Will be called

--- with `data` as argument and should return array of string candidates to

--- choose from.

--- Default: for most types - |getcompletion()| with empty pattern and

--- input `type`; for `help` and `option` type - all available help tags and

--- option names (long and short) respectively.

---

---@return string Autocorrected word.

MiniCmdline.default_autocorrect_func = function(data, opts)

H.check_type('data', data, 'table')

H.check_type('data.word', data.word, 'string')

H.check_type('data.type', data.type, 'string')

opts = opts or {}

local strict_type = opts.strict_type == nil or opts.strict_type

if strict_type and not H.autocorrect_strict_types[data.type] then return data.word end

-- Get all valid words

local all = vim.is_callable(opts.get_candidates) and opts.get_candidates(data) or H.get_autocorrect_candidates(data)

if vim.tbl_contains(all, data.word) or data.word == '' then return data.word end

-- Make results stable in case several candidates have the same distance

table.sort(all)

-- Handle commands separately: need dedicated abbreviation length

-- computation and to allow `!`

if data.type == 'command' then return H.get_nearest_command(data.word, all) end

-- Fall back to computing nearest string without allowing abbreviations

local abbr_lens = vim.tbl_map(string.len, all)

return H.get_nearest_abbr(data.word, all, abbr_lens)

end

--- Default autopeek predicate

---

---@param data table Input autopeek data. As described in |MiniCmdline.config|.

---@param opts table|nil Options. Reserved for future use.

---

---@return boolean If command defines |:command-preview| - `false`, otherwise - `true`.

--- This makes autopeek easier to use for commands like |:substitute|,

--- especially if |'inccommand'| is set to `split`.

MiniCmdline.default_autopeek_predicate = function(data, opts)

local cmd_preview_map = H.cache.cmd_preview_map or H.get_cmd_preview_map()

return cmd_preview_map[data.cmd] ~= true

end

--- Default autopeek statuscolumn

---

--- - Show signs next to lines depending on their relation to peeked range.

--- Highlighted with `MiniCmdlinePeekSign` group.

--- - Show line numbers for left and right parts of the range.

--- Highlighted with `MiniCmdlinePeekLineNr` group.

--- - Separate statuscolumn and buffer text with dedicated separator character.

--- Highlighted with `MiniCmdlinePeekSep` group.

---

--- Notes:

--- - Intended to only be used as a part of |'statuscolumn'| function, as it

--- uses |v:lnum| and |v:virtnum| to compute the output.

---

--- Example of adjusting a `mid` sign: >lua

---

--- local peek_stc_opts = { signs = { mid = '+' } }

--- local peek_stc = function(data)

--- return MiniCmdline.default_autopeek_statuscolumn(data, peek_stc_opts)

--- end

--- require('mini.cmdline').setup({

--- autopeek = { window = { statuscolumn = peek_stc } },

--- })

--- <

---@param data table Input peek data. As described in |MiniCmdline.config|.

---@param opts table|nil Options. Possible fields:

--- - <signs> `(table)` - signs to show. Possible fields:

--- - <same> `(string)` - on range if `left=right`. Default: `'🭬'`.

--- - <left> `(string)` - on `left` line. Default: `'┌'`.

--- - <mid> `(string)` - inside range. Default: `'┊'`.

--- - <right> `(string)` - on `right` line. Default: `'└'`.

--- - <out> `(string)` - outside of range. Default: `''` (no sign).

--- - <virt> `(string)` - virtual line. Default: `'•'`.

--- - <wrap> `(string)` - wrapped line. Default: `'↳'`.

--- - <sep> `(string)` - string to put at the end to separate statuscolumn and

--- buffer text. Default: `'│'`

---

--- Note: Any sign and separator should have every `%` escaped as `%%` (due to its

--- special meaning in |'statuscolumn'|).

MiniCmdline.default_autopeek_statuscolumn = function(data, opts)

opts = opts or {}

local signs = opts.signs or {}

local sep_format = opts.sep == nil and '│' or opts.sep:gsub('%%', '%%%%')

if vim.v.virtnum ~= 0 then

local sign = (vim.v.virtnum < 0 and (signs.virt or '•') or (signs.wrap or '↳'))

-- Format as `sign %= sep-hl sep`

return sign .. '%=%#MiniCmdlinePeekSep#' .. sep_format:gsub('%%%%', '%%')

end

local n, l, r = vim.v.lnum, data.left, data.right

-- Format as `sign-hl sign linenr-hl %= linenr sep-hl sep`

local fmt = '%%#MiniCmdlinePeekSign#%s%%#MiniCmdlinePeekLineNr#%%=%s%%#MiniCmdlinePeekSep#' .. sep_format

if n == l and n == r then return string.format(fmt, signs.same or '🭬', n) end

if n == l then return string.format(fmt, signs.left or '┌', n) end

if n == r then return string.format(fmt, signs.right or '└', n) end

if (l < n and n < r) or (r < n and n < l) then return string.format(fmt, signs.mid or '┊', '') end

return string.format(fmt, signs.out or '', '')

end

-- Helper data ================================================================

-- Module default config

H.default_config = vim.deepcopy(MiniCmdline.config)

-- Timers

H.timers = {

autocomplete = vim.loop.new_timer(),

}

-- Autocomplete requires `noselect` flag of 'wildmode'. Present in Neovim>=0.11

H.can_autocomplete = vim.fn.has('nvim-0.11') == 1

-- Autocorrect types for which words *must* be from some fixed set

-- Basically a subset of `:h :command-complete` which might lead to an error if

-- word is not from a fixed set. Can be adjusted for more nuances.

-- Reasons for not including a type:

-- - The main reason is because type's usage can be done in context when

-- creating a new object. Like `:edit new-file` for `file` type.

-- - No `help` because there already is an autocorrection with a "sophisticated

-- algorithm to decide which match is better than another one".

-- - No `buffer` because completion candidates only include names for listed

-- buffers. So ids of listed buffers and name+ids of unlisted buffers are

-- missing. Also, partial buffer name is enough for `:buffer`, which would

-- be too cumbersome to account for.

--stylua: ignore

H.autocorrect_strict_types = {

arglist = true, -- file names in argument list

-- augroup = true, -- autocmd groups

-- breakpoint = true, -- |:breakadd| suboptions

-- buffer = true, -- buffer names

color = true, -- color schemes

command = true, -- Ex command (and arguments)

compiler = true, -- compilers

diff_buffer = true, -- diff buffer names

-- dir = true, -- directory names

-- dir_in_path = true, -- directory names in |'cdpath'|

-- environment = true, -- environment variable names

event = true, -- autocommand events

-- expression = true, -- Vim expression

-- file = true, -- file and directory names

-- file_in_path = true, -- file and directory names in |'path'|

filetype = true, -- filetype names |'filetype'|

-- ['function'] = true, -- function name

-- help = true, -- help subjects

-- highlight = true, -- highlight groups

history = true, -- |:history| suboptions

keymap = true, -- keyboard mappings

locale = true, -- locale names (as output of locale -a)

-- lua = true, -- Lua expression |:lua|

mapclear = true, -- buffer argument

-- mapping = true, -- mapping name

-- menu = true, -- menus

messages = true, -- |:messages| suboptions

option = true, -- options

packadd = true, -- optional package |pack-add| names

-- runtime = true, -- file and directory names in |'runtimepath'|

-- scriptnames = true, -- sourced script names

-- shellcmd = true, -- Shell command

-- shellcmdline = true, -- First is a shell command and subsequent ones are filenames

sign = true, -- |:sign| suboptions

syntax = true, -- syntax file names |'syntax'|

syntime = true, -- |:syntime| suboptions

-- tag = true, -- tags

-- tag_listfiles = true, -- tags, file names are shown when CTRL-D is hit

-- user = true, -- user names

-- var = true, -- user variables

}

-- Various cache to use during command line edit

H.cache = {}

-- Helper functionality =======================================================

-- Settings -------------------------------------------------------------------

H.setup_config = function(config)

H.check_type('config', config, 'table', true)

config = vim.tbl_deep_extend('force', vim.deepcopy(H.default_config), config or {})

H.check_type('autocomplete', config.autocomplete, 'table')

H.check_type('autocomplete.enable', config.autocomplete.enable, 'boolean')

H.check_type('autocomplete.delay', config.autocomplete.delay, 'number')

H.check_type('autocomplete.predicate', config.autocomplete.predicate, 'function', true)

H.check_type('autocomplete.map_arrows', config.autocomplete.map_arrows, 'boolean')

H.check_type('autocorrect', config.autocorrect, 'table')

H.check_type('autocorrect.enable', config.autocorrect.enable, 'boolean')

H.check_type('autocorrect.func', config.autocorrect.func, 'function', true)

H.check_type('autopeek', config.autopeek, 'table')

H.check_type('autopeek.enable', config.autopeek.enable, 'boolean')

H.check_type('autopeek.n_context', config.autopeek.n_context, 'number')

H.check_type('autopeek.predicate', config.autopeek.predicate, 'callable', true)

H.check_type('autopeek.window', config.autopeek.window, 'table')

local autopeek_win_config = config.autopeek.window.config

if not (type(autopeek_win_config) == 'table' or vim.is_callable(autopeek_win_config)) then

H.error('`autopeek.window.config` should be table or callable, not ' .. type(autopeek_win_config))

end

H.check_type('autopeek.window.statuscolumn', config.autopeek.window.statuscolumn, 'callable', true)

return config

end

H.apply_config = function(config)

MiniCmdline.config = config

-- Try setting suggested option values

-- NOTE: This makes it more like 'mini.completion' (with 'noselect')

local was_set = vim.api.nvim_get_option_info2('wildmode', { scope = 'global' }).was_set

if not was_set and config.autocomplete.enable and H.can_autocomplete then vim.o.wildmode = 'noselect,full' end

was_set = vim.api.nvim_get_option_info2('wildoptions', { scope = 'global' }).was_set

if not was_set then vim.o.wildoptions = 'pum,fuzzy' end

-- Set useful mappings

if config.autocomplete.map_arrows then

local map_arrow = function(dir, wildmenu_prefix, desc)

local rhs = function() return (vim.fn.wildmenumode() == 1 and wildmenu_prefix or '') .. dir end

vim.keymap.set('c', dir, rhs, { expr = true, desc = desc })

end

map_arrow('<Left>', '<Space><BS>', 'Move cursor left')

map_arrow('<Right>', '<Space><BS>', 'Move cursor right')

-- NOTE: All tests seem to pass without these mappings. But it is mentioned

-- in `:h cmdline-autocompletion`, so probably worth adding

map_arrow('<Up>', '<C-e>', 'Go to earlier history')

map_arrow('<Down>', '<C-e>', 'Go to newer history')

end

end

H.create_autocommands = function()

local gr = vim.api.nvim_create_augroup('MiniCmdline', {})

local au = function(event, pattern, callback, desc)

vim.api.nvim_create_autocmd(event, { group = gr, pattern = pattern, callback = callback, desc = desc })

end

-- Act on command line events. Notes:

-- - Schedule for 'CmdlineEnter' to not act on mappings like `:...`

-- (like `:<C-u>...` popular for Visual mode).

-- - Schedule for 'CmdlineChanged' to work around autcompletion issues with

-- mocking wildchar.

-- - Do not schedule 'CmdlineLeave' to be able to set command text before

-- executing it.

au('CmdlineEnter', '*', vim.schedule_wrap(H.on_cmdline_enter), 'Act on command line enter')

au('CmdlineChanged', '*', vim.schedule_wrap(H.on_cmdline_changed), 'Act on command line change')

au('CmdlineLeave', '*', H.on_cmdline_leave, 'Act on command line leave')

au('VimResized', '*', function() H.autopeek(true) end, 'Adjust peek window')

au('CmdwinEnter', '*', function() H.peek_hide() end, 'Hide peek window')

au('ColorScheme', '*', H.create_default_hl, 'Ensure colors')

end

H.create_default_hl = function()

local hi = function(name, opts)

opts.default = true

vim.api.nvim_set_hl(0, name, opts)

end

hi('MiniCmdlinePeekBorder', { link = 'FloatBorder' })

hi('MiniCmdlinePeekLineNr', { link = 'DiagnosticSignWarn' })

hi('MiniCmdlinePeekNormal', { link = 'NormalFloat' })

hi('MiniCmdlinePeekSep', { link = 'SignColumn' })

hi('MiniCmdlinePeekSign', { link = 'DiagnosticSignHint' })

hi('MiniCmdlinePeekTitle', { link = 'FloatTitle' })

end

H.is_disabled = function() return vim.g.minicmdline_disable == true or vim.b.minicmdline_disable == true end

H.get_config = function() return vim.tbl_deep_extend('force', MiniCmdline.config, vim.b.minicmdline_config or {}) end

-- Autocommands ---------------------------------------------------------------

H.on_cmdline_enter = function()

-- Check for Command-line mode to not act on `:...` mappings

if H.is_disabled() or vim.fn.mode() ~= 'c' then return end

-- Act only on "not nested" command line (for simplicity). It can nest after

-- `c_CTRL-R_=`, since there are CmdlineEnter-CmdlineChanged-CmdlineLeave for

-- it without explicit leave-enter for the initial normal Ex command mode.

-- There doesn't seem to be a way to have `n_nested > 1`, but use counter of

-- nested levels instead of a boolean `is_nested` just in case.

if H.cache.state ~= nil then

H.cache.n_nested = (H.cache.n_nested or 0) + 1

return

end

H.cache = {

buf_id = vim.api.nvim_get_current_buf(),

cmd_preview_map = H.get_cmd_preview_map(),

cmd_type = vim.fn.getcmdtype(),

config = H.get_config(),

peek = {},

state = H.get_cmd_state(),

state_prev = H.get_cmd_state(true),

}

H.cache.autocomplete_predicate = H.cache.config.autocomplete.predicate or MiniCmdline.default_autocomplete_predicate

H.cache.buf_is_cmdwin = vim.fn.getbufinfo(H.cache.buf_id)[1].command == 1

H.cache.autopeek_predicate = H.cache.config.autopeek.predicate or MiniCmdline.default_autopeek_predicate

MiniCmdline._peek_statuscolumn = H.make_peek_statuscolumn()

if H.cache.config.autopeek.enable then H.autopeek() end

end

H.on_cmdline_changed = function()

if H.cache.state == nil or H.cache.n_nested ~= nil then return end

-- Act only on actual line change

local state = H.get_cmd_state()

if state.line == H.cache.state.line then return end

-- Update state accounting for some edge cases

if H.cache.state_prev.compltype == 'option' then H.adjust_option_cmd_state(state) end

H.cache.state_prev, H.cache.state = H.cache.state, state

local config = H.cache.config

if config.autocomplete.enable and H.can_autocomplete then H.autocomplete() end

if config.autocorrect.enable then H.autocorrect(false) end

if config.autopeek.enable then H.autopeek() end

end

H.on_cmdline_leave = function()

if H.cache.state == nil then return end

if H.cache.n_nested ~= nil then

H.cache.n_nested = H.cache.n_nested > 1 and (H.cache.n_nested - 1) or nil

return

end

if H.cache.config.autocorrect.enable and not vim.v.event.abort then H.autocorrect(true) end

H.peek_hide()

H.cache = {}

MiniCmdline._peek_statuscolumn = nil

end

H.get_cmd_state = function(is_init)

local compltype = vim.fn.getcmdcompltype()

if is_init then return { complpat = '', compltype = compltype, line = '', pos = 1, cmd = {} } end

return { complpat = H.getcmdcomplpat(), compltype = compltype, line = vim.fn.getcmdline(), pos = vim.fn.getcmdpos() }

end

H.adjust_option_cmd_state = function(state)

-- Cases like `set nowrap invmagic` are completed specially. After `no`/`inv`

-- there is a specialized completion only for boolean options. In practice it

-- results into `compltype=''` and `complpat=<text after no/inv>`.

-- This interferes with how autocorrection is detected, as it relies on whole

-- `nowrap` / `invmagic` to be a single complpat *with compltype=option*.

--

-- The solution is to detect cases "it was compltype=option but now it isn't"

-- and try to expand complpat to match the whole word on cursor's left.

if state.compltype == 'option' then return end

state.complpat = state.line:sub(1, state.pos - 1):match(' (%w+)$') or ''

state.compltype = state.complpat ~= '' and 'option' or state.compltype

end

-- Autocomplete ---------------------------------------------------------------

H.autocomplete = function()

H.timers.autocomplete:stop()

-- Do not complete if predicate says so

local state, state_prev = H.cache.state, H.cache.state_prev

local data = { line = state.line, pos = state.pos, line_prev = state_prev.line, pos_prev = state_prev.pos }

if not H.cache.autocomplete_predicate(data) then return H.hide_wild() end

-- Do nothing in some problematic cases (when wildmenu does not work)

-- TODO: Remove after compatibility with Neovim=0.11 is dropped

if H.block_autocomplete() then return end

local delay = H.cache.config.autocomplete.delay

if delay == 0 then return H.trigger_complete() end

H.timers.autocomplete:start(delay, 0, H.trigger_complete_scheduled)

end

H.block_autocomplete = function() return false end

if vim.fn.has('nvim-0.12') == 0 then

H.block_autocomplete = function()

-- Block for non-interactive command type

if H.cache.cmd_type ~= ':' then return true end

-- Block for cases when there is no completion candidates. This affects

-- performance (completion candidates are computed twice), but it is

-- the most robust way of dealing with problematic situations:

-- - Some commands don't have completion defined: `:s`, `:g`, etc.

-- - Some cases result in verbatim `^I` inserted. Like after bang (`:q!`).

--

-- The `vim.fn.getcmdcompltype() == ''` condition is too wide as it denies

-- legitimate cases of when there are available completion candidates.

-- Like in user commands created with `vim.api.nvim_create_user_command()`.

local line_before_pos = H.cache.state.line:sub(1, H.cache.state.pos - 1)

-- `getcompletion` may result in error, like after `:ltag `

local ok, candidates = pcall(vim.fn.getcompletion, line_before_pos, 'cmdline')

return not (ok and #candidates > 0)

end

end

H.trigger_complete = function()

if vim.fn.mode() ~= 'c' then return end

H.trigger_wild()

end

H.trigger_complete_scheduled = vim.schedule_wrap(H.trigger_complete)

H.trigger_wild = function() vim.fn.wildtrigger() end

if vim.fn.has('nvim-0.12') == 0 then

H.trigger_wild = function()

-- Not triggerring when wildmenu is shown helps avoiding trigger after

-- manually pressing wildchar (as text is also changes).

if vim.fn.wildmenumode() == 1 then return end

-- Type `<C-z>` which is "Trigger 'wildmode', but always available."

vim.api.nvim_feedkeys('\26', 'nt', false)

end

end

H.hide_wild = function()

-- Ensure that there is no outdated pmenu after `wildtrigger()`

vim.cmd('redraw')

-- This works, but it triggers wildmenu, which is not usable when the point

-- is to hide pmenu if `autocomplete.predicate()` returned `false` ()

-- local keys = (vim.fn.wildmenumode() == 0 and '\26' or '') .. '\5'

-- vim.api.nvim_feedkeys(keys, 'nt', false)

end

if vim.fn.has('nvim-0.12') == 0 then H.hide_wild = function() end end

-- Autocorrect ----------------------------------------------------------------

H.autocorrect = function(is_final)

-- Act only for normal Ex commands after a word is just finished typing

if not (H.cache.cmd_type == ':' and H.cache.state.line:find('%S') ~= nil) then return end

local state, state_prev = H.cache.state, H.cache.state_prev

local line, line_prev = state.line, state_prev.line

local pos, pos_prev = state.pos, state_prev.pos

-- Act only when a char is appended. It makes tweaking autocorrected text

-- easier by going back and editing it. This is also easier to implement.

local is_at_end, was_at_end = (pos - 1) == line:len(), (pos_prev - 1) == line_prev:len()

local new = line:sub(pos_prev)

local is_char_append = is_at_end and was_at_end and line == (line_prev .. new) and vim.fn.strchars(new) <= 1

local is_word_finished = not vim.startswith(state.complpat, state_prev.complpat)

if not (is_char_append and (is_word_finished or is_final)) then return end

-- Compute autocorrection

local state_to_use = is_final and state or state_prev

local word = state_to_use.complpat

if word == '' or vim.fn.maparg(word, 'c', true) ~= '' then return end

local func = H.cache.config.autocorrect.func or MiniCmdline.default_autocorrect_func

local new_word = func({ word = word, type = state_to_use.compltype }) or word

if word == new_word then return end

if type(new_word) ~= 'string' then return H.notify('Can not autocorrect for ' .. vim.inspect(word), 'WARN') end

-- Set corrected word

local init_pos = state_to_use.pos

local new_line = line:sub(1, init_pos - word:len() - 1) .. new_word .. line:sub(init_pos)

-- - Use `noautocmd` to not conflict with `autocomplete` on `CmdlineChanged`

local cmd = string.format('call setcmdline(%s, %s)', vim.inspect(new_line), new_line:len() + 1)

vim.cmd('noautocmd ' .. cmd)

end

H.get_autocorrect_candidates = function(data)

if data.type == 'help' then

local help_buf = vim.api.nvim_create_buf(false, true)

vim.bo[help_buf].buftype = 'help'

-- - NOTE: no dedicated buffer name because it is immediately wiped out

local tags = vim.api.nvim_buf_call(help_buf, function() return vim.fn.taglist('.*') end)

vim.api.nvim_buf_delete(help_buf, { force = true })

return vim.tbl_map(function(x) return x.name end, tags)

end

if data.type == 'option' then

local all = {}

for name, info in pairs(vim.api.nvim_get_all_options_info()) do

table.insert(all, name)

local is_bool = info.type == 'boolean'

table.insert(all, is_bool and ('no' .. name) or nil)

table.insert(all, is_bool and ('inv' .. name) or nil)

local has_shortname = info.shortname ~= ''

table.insert(all, has_shortname and info.shortname or nil)

table.insert(all, (has_shortname and is_bool) and ('no' .. info.shortname) or nil)

table.insert(all, (has_shortname and is_bool) and ('inv' .. info.shortname) or nil)

end

return all

end

local ok, all = pcall(vim.fn.getcompletion, '', data.type)

return ok and all or { data.word }

end

H.get_nearest_command = function(ref, all)

-- Do not alter `:=` command, as it is a special Lua shorthand command

if ref:sub(1, 1) == '=' then return ref end

-- Allow trailing special punctuation (specific to commands)

local word, suffix = ref:match('^(.+)([!|]?)$')

-- Account for the fact that commands can be abbreviated (`:h |20.2|`):

local cmd_abbr_lens, usr_cmds, usr_max_len = {}, {}, 0

for _, cmd in ipairs(all) do

-- User command abbreviation needs to uniquely identify command name

if cmd:find('^[A-Z]') ~= nil then

usr_cmds[cmd] = true

usr_max_len = math.max(usr_max_len, cmd:len())

else

-- ANY abbreviation of ANY built-in command is a valid command (may be

-- different; `wincmd`->`w`==`write`). Its an internal optimization.

-- EXCEPT: `:def` abbreviation of `:defer` is not allowed.

cmd_abbr_lens[cmd] = cmd == 'defer' and 4 or 1

end

end

-- Slice user commands with increasing abbreviation length to find which

-- ones can be uniquely identified by it

for cur_abbr_len = 1, usr_max_len do

local cur_abbrs = {}

for cmd, _ in pairs(usr_cmds) do

local abbr = cmd:sub(1, cur_abbr_len)

cur_abbrs[abbr] = cur_abbrs[abbr] or {}

table.insert(cur_abbrs[abbr], cmd)

end

for _, cmd_arr in pairs(cur_abbrs) do

if #cmd_arr == 1 then

local cmd = cmd_arr[1]

cmd_abbr_lens[cmd] = math.min(cur_abbr_len, cmd:len())

usr_cmds[cmd] = nil

end

end

end

local abbr_lens = vim.tbl_map(function(x) return cmd_abbr_lens[x] end, all)

return H.get_nearest_abbr(word, all, abbr_lens) .. suffix

end

H.get_nearest_abbr = function(word, candidates, abbr_lens)

local tolower = vim.fn.tolower

local word_split = vim.split(word, '')

local word_split_l = vim.split(tolower(word), '')

-- Prefer closest string respecting case first, then try ignorecase

local res, res_dist = nil, math.huge

for i, cand in ipairs(candidates) do

local min_abbr_len = abbr_lens[i]

local d, abbr_len = H.string_abbr_dist(word_split, vim.split(cand, ''), min_abbr_len)

if d < res_dist then

res, res_dist = cand:sub(1, abbr_len), d

end

end

for i, cand in ipairs(candidates) do

local min_abbr_len = abbr_lens[i]

local cand_word_l = tolower(cand)

local d_l, abbr_len_l = H.string_abbr_dist(word_split_l, vim.split(cand_word_l, ''), min_abbr_len)

if d_l < res_dist then

res, res_dist = cand:sub(1, abbr_len_l), d_l

end

end

return res

end

H.string_abbr_dist = function(ref, cand, min_abbr_len)

-- Source: https://en.wikipedia.org/wiki/Damerau-Levenshtein_distance

-- d[i][j] - distance between `ref[1:i]` and `cand[1:j]` abbreviations

local d = {}

for i = 0, #ref do

d[i] = { [0] = i }

end

for j = 0, #cand do

d[0][j] = j

end

for i = 1, #ref do

for j = 1, #cand do

local cost = ref[i] == cand[j] and 0 or 1

-- Account for deletion, insertion, substitution

d[i][j] = math.min(d[i - 1][j] + 1, d[i][j - 1] + 1, d[i - 1][j - 1] + cost)

-- Account for transposition. Slightly favor them over others, as it is

-- a common source for autocorrection

if i > 1 and j > 1 and ref[i] == cand[j - 1] and ref[i - 1] == cand[j] then

d[i][j] = math.min(d[i][j], d[i - 2][j - 2] + 0.99 * cost)

end

end

end

-- Find the candidate abbreviation with the smallest distance

local abbr_d = d[#ref]

local dist, abbr_len = math.huge, nil

for j = min_abbr_len, #cand do

if abbr_d[j] < dist then

dist, abbr_len = abbr_d[j], j

end

end

return dist, abbr_len

end

-- Autopeek -------------------------------------------------------------------

H.autopeek = function(force)

-- Decide if peek needs to be shown or hidden

if not (H.cache.cmd_type == ':' and not H.cache.buf_is_cmdwin) then return end

local line = H.cache.state.line

if line:find('%S') == nil then H.peek_hide() end

local parsed = H.parse_cmd(line)

local range, cmd = parsed.range, parsed.cmd

if range[1] == nil and range[2] == nil then return H.peek_hide() end

-- Normalize range lines

local n_lines = vim.api.nvim_buf_line_count(0)

local left = H.clamp(range[1] or range[2], 1, n_lines)

local right = H.clamp(range[2] or range[1], 1, n_lines)

local from = right < left and right or left

local to = right < left and left or right

local data = { left = left, right = right, cmd = parsed.cmd }

-- Do not peek if predicate says so

if not H.cache.autopeek_predicate(data) then return H.peek_hide() end

-- Force peek update if command line height has changed when typing

local cmdheight = math.ceil((vim.fn.strdisplaywidth(line) + 1) / vim.o.columns)

cmdheight = math.max(cmdheight, vim.o.cmdheight)

force = force or cmdheight ~= H.cache.peek.cmdheight

-- Skip peek update if command line state is the same (for performance)

local cur_data = H.cache.peek.data or {}

local is_data_same = left == cur_data.left and right == cur_data.right and cmd == cur_data.cmd

if not force and is_data_same then return end

H.cache.peek.cmdheight = cmdheight

H.cache.peek.data = data

H.cache.peek.win_id = H.peek_show(from, to)

end

H.peek_show = function(from, to)

-- Compute height to show union of left and right contexts plus possible fold

local n_context = math.max(H.cache.config.autopeek.n_context, 0)

local n_lines = vim.api.nvim_buf_line_count(0)

local cont_from = H.peek_new_context(from, n_context, n_lines)

local cont_to = H.peek_new_context(to, n_context, n_lines)

local height = H.peek_get_height(cont_from, cont_to)

-- Ensure opened window of enough height.

-- NOTE: This uses current buffer directly, which means that all its extmarks

-- are shown. This is both good (for extra text highlighting) and bad

-- (virtual lines and text) thing. Ideally, extmark "owners" should take care

-- of where they should be shown. Usually setting something like "only show

-- inside this particular window" makes sense. Like in 'mini.diff' and

-- 'mini.indentscope'. This is currently not (robustly) possible. Sources:

-- - https://github.com/neovim/neovim/issues/19654

-- - https://github.com/neovim/neovim/pull/27361

-- - https://github.com/neovim/neovim/pull/28432

-- - https://github.com/neovim/neovim/pull/28728

local config = H.peek_get_config(height)

local win_id = H.cache.peek.win_id

win_id = H.is_valid_win(win_id) and win_id or vim.api.nvim_open_win(0, false, config)

vim.api.nvim_win_set_config(win_id, config)

-- Ensure context fits the window (it may be not enough height to fit whole)

if config.height < height then H.peek_adjust_context(cont_from, cont_to, height, config.height) end

-- Finalize window view

vim.api.nvim_win_call(win_id, function()

-- Define window-local options

vim.cmd("setlocal foldenable foldlevel=0 foldmethod=manual foldminlines=1 foldtext=''")

vim.cmd('setlocal foldcolumn=0 nocursorline nonumber scrolloff=0 signcolumn=no nowrap')