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mini.txt
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==============================================================================
------------------------------------------------------------------------------
*mini.nvim*
*mini.txt* Collection of minimal, independent and fast Lua modules
Author: Evgeni Chasnovski
License: MIT
|mini.nvim| is a collection of minimal, independent, and fast Lua modules
dedicated to improve Neovim (version 0.5 and higher) experience. Each
module can be considered as a separate sub-plugin.
Table of contents:
General overview.................................................|mini.nvim|
Plugin colorschemes................................|mini.nvim-color-schemes|
Extended a/i textobjects...........................................|mini.ai|
Base16 colorscheme creation....................................|mini.base16|
Remove buffers..............................................|mini.bufremove|
Comment.......................................................|mini.comment|
Completion and signature help..............................|mini.completion|
Highlight word under cursor................................|mini.cursorword|
Generate help files...............................................|mini.doc|
Fuzzy matching..................................................|mini.fuzzy|
Visualize and operate on indent scope.....................|mini.indentscope|
Jump cursor to a single character................................|mini.jump|
Jump within visible lines......................................|mini.jump2d|
Miscellaneous functions..........................................|mini.misc|
Autopairs.......................................................|mini.pairs|
Session management...........................................|mini.sessions|
Start screen..................................................|mini.starter|
Statusline.................................................|mini.statusline|
Surround.....................................................|mini.surround|
Tabline.......................................................|mini.tabline|
Test Neovim plugins..............................................|mini.test|
Trailspace (highlight and remove)..........................|mini.trailspace|
# General principles~
- <Design>. Each module is designed to solve a particular problem targeting
balance between feature-richness (handling as many edge-cases as
possible) and simplicity of implementation/support. Granted, not all of
them ended up with the same balance, but it is the goal nevertheless.
- <Independence>. Modules are independent of each other and can be run
without external dependencies. Although some of them may need
dependencies for full experience.
- <Structure>. Each module is a submodule for a placeholder "mini" module. So,
for example, "surround" module should be referred to as "mini.surround".
As later will be explained, this plugin can also be referred to
as "MiniSurround".
- <Setup>:
- Each module (if needed) should be setup separately with
`require(<name of module>).setup({})`
(possibly replace {} with your config table or omit to use defaults).
You can supply only values which differ from defaults, which will be
used for the rest ones.
- Call to module's `setup()` always creates a global Lua object with
coherent camel-case name: `require('mini.surround').setup()` creates
`_G.MiniSurround`. This allows for a simpler usage of plugin
functionality: instead of `require('mini.surround')` use
`MiniSurround` (or manually `:lua MiniSurround.*` in command line);
available from `v:lua` like `v:lua.MiniSurround`. Considering this,
"module" and "Lua object" names can be used interchangeably:
'mini.surround' and 'MiniSurround' will mean the same thing.
- Each supplied `config` table (after extending with default values) is
stored in `config` field of global object. Like `MiniSurround.config`.
- Values of `config`, which affect runtime activity, can be changed on
the fly to have effect. For example, `MiniSurround.config.n_lines`
can be changed during runtime; but changing
`MiniSurround.config.mappings` won't have any effect (as mappings are
created once during `setup()`).
- <Buffer local configuration>. Each module can be additionally configured
to use certain runtime config settings locally to buffer. See
|mini.nvim-buffer-local-config| for more information.
- <Disabling>. Each module's core functionality can be disabled globally or
buffer-locally by creating appropriate global or buffer-scoped variables
equal to |v:true|. See |mini.nvim-disabling-recipes| for common recipes.
- <Highlight groups>. Appearance of module's output is controlled by
certain highlight group (see |highlight-groups|). To customize them, use
|highlight| command. Note: currently not many Neovim themes support this
plugin's highlight groups; fixing this situation is highly appreciated.
To see a more calibrated look, use |MiniBase16| or plugin's colorschemes.
- <Stability>. Each module upon release is considered to be relatively
stable: both in terms of setup and functionality. Any
non-bugfix backward-incompatible change will be released gradually as
much as possible.
# List of modules~
- |MiniAi| - Extend and create `a`/`i` textobjects (like in `di(` or
`va"`). It enhances some builtin |text-objects| (like |a(|, |a)|, |a'|,
and more), creates new ones (like `a*`, `a<Space>`, `af`, `a?`, and
more), and allows user to create their own (like based on treesitter, and
more). Supports dot-repeat, `v:count`, different search methods,
consecutive application, and customization via Lua patterns or functions.
Has builtins for brackets, quotes, function call, argument, tag, user
prompt, and any punctuation/digit/whitespace character.
- |MiniBase16| - fast implementation of base16 theme for manually supplied
palette. Has unique palette generator which needs only background and
foreground colors.
- |MiniBufremove| - buffer removing (unshow, delete, wipeout) while saving
window layout.
- |MiniComment| - fast and familiar per-line code commenting.
- |MiniCompletion| - async (with customizable 'debounce' delay) 'two-stage
chain completion': first builtin LSP, then configurable fallback. Also
has functionality for completion item info and function signature (both
in floating window appearing after customizable delay).
- |MiniCursorword| - automatic highlighting of word under cursor (displayed
after customizable delay). Current word under cursor can be highlighted
differently.
- |MiniDoc| - generation of help files from EmmyLua-like annotations.
Allows flexible customization of output via hook functions. Used for
documenting this plugin.
- |MiniFuzzy| - functions for fast and simple fuzzy matching. It has
not only functions to perform fuzzy matching of one string to others, but
also a sorter for |telescope.nvim|.
- |MiniIndentscope| - Visualize and operate on indent scope. Supports
customization of debounce delay, animation style, and different
granularity of options for scope computing algorithm.
- |MiniJump| - minimal and fast module for smarter jumping to a single
character.
- |MiniJump2d| - minimal and fast Lua plugin for jumping (moving cursor)
within visible lines via iterative label filtering. Supports custom jump
targets (spots), labels, hooks, allowed windows and lines, and more.
- |MiniMisc| - collection of miscellaneous useful functions. Like `put()`
and `put_text()` which print Lua objects to command line and current
buffer respectively.
- |MiniPairs| - autopairs plugin which has minimal defaults and
functionality to do per-key expression mappings.
- |MiniSessions| - session management (read, write, delete) which works
using |mksession|. Implements both global (from configured directory) and
local (from current directory) sessions.
- |MiniStarter| - minimal, fast, and flexible start screen. Displayed items
are fully customizable both in terms of what they do and how they look
(with reasonable defaults). Item selection can be done using prefix query
with instant visual feedback.
- |MiniStatusline| - minimal and fast statusline. Has ability to use custom
content supplied with concise function (using module's provided section
functions) along with builtin default. For full experience needs [Nerd
font](https://www.nerdfonts.com/),
[gitsigns.nvim](https://github.com/lewis6991/gitsigns.nvim) plugin, and
[nvim-web-devicons](https://github.com/kyazdani42/nvim-web-devicons)
plugin (but works without any them).
- |MiniSurround| - fast surround plugin. Add, delete, replace, find,
highlight surrounding (like pair of parenthesis, quotes, etc.). Has
special "function call", "tag", and "interactive" surroundings. Supports
dot-repeatability, textobject, motions.
- |MiniTest| - framework for writing extensive Neovim plugin tests.
Supports hierarchical tests, hooks, parametrization, filtering (like from
current file or cursor position), screen tests, "busted-style" emulation,
customizable reporters, and more. Designed to be used with provided
wrapper for managing child Neovim processes.
- |MiniTabline| - minimal tabline which always shows listed (see 'buflisted')
buffers. Allows showing extra information section in case of multiple vim
tabpages. For full experience needs
[nvim-web-devicons](https://github.com/kyazdani42/nvim-web-devicons).
- |MiniTrailspace| - automatic highlighting of trailing whitespace with
functionality to remove it.
------------------------------------------------------------------------------
*mini.nvim-disabling-recipes*
Common recipes for disabling functionality
Each module's core functionality can be disabled globally or buffer-locally
by creating appropriate global or buffer-scoped variables equal to
|v:true|. Functionality is disabled if at least one of `g:` or `b:`
variables is equal to `v:true`.
Variable names have the same structure: `{g,b}:mini*_disable` where `*` is
module's lowercase name. For example, `g:minicursorword_disable` disables
|mini.cursorword| globally and `b:minicursorword_disable` - for
corresponding buffer. Note: in this section disabling 'mini.cursorword' is
used as example; everything holds for other module variables.
Considering high number of different scenarios and customization intentions,
writing exact rules for disabling module's functionality is left to user.
# Manual disabling~
- Disable globally:
Lua - `:lua vim.g.minicursorword_disable=true`
Vimscript - `:let g:minicursorword_disable=v:true`
- Disable for current buffer:
Lua - `:lua vim.b.minicursorword_disable=true`
Vimscript - `:let b:minicursorword_disable=v:true`
- Toggle (disable if enabled, enable if disabled):
Globally - `:lua vim.g.minicursorword_disable = not vim.g.minicursorword_disable`
For buffer - `:lua vim.b.minicursorword_disable = not vim.b.minicursorword_disable`
# Automated disabling~
- Disable for a certain |filetype| (for example, "markdown"):
`autocmd Filetype markdown lua vim.b.minicursorword_disable = true`
- Enable only for certain filetypes (for example, "lua" and "python"):
`au FileType * if index(['lua', 'python'], &ft) < 0 | let b:minicursorword_disable=v:true | endif`
- Disable in Insert mode (use similar pattern for Terminal mode or indeed
any other mode change with |ModeChanged| starting from Neovim 0.7.0):
`au InsertEnter * lua vim.b.minicursorword_disable = true`
`au InsertLeave * lua vim.b.minicursorword_disable = false`
- Disable in Terminal buffer:
`au TermOpen * lua vim.b.minicursorword_disable = true`
------------------------------------------------------------------------------
*mini.nvim-buffer-local-config*
Buffer local config
Each module can be additionally configured locally to buffer by creating
appropriate buffer-scoped variable with values you want to override. It
will affect only runtime options and not those used once during setup (like
`mappings` or `set_vim_settings`).
Variable names have the same structure: `b:mini*_config` where `*` is
module's lowercase name. For example, `b:minicursorword_config` can store
information about how |mini.cursorword| will act inside current buffer. Its
value should be a table with same structure as module's `config`.
Continuing example, `vim.b.minicursorword_config = { delay = 500 }` will
use delay 500 inside current buffer.
Considering high number of different scenarios and customization intentions,
writing exact rules for module's buffer local configuration is left to
user. It is done in similar fashion to |mini.nvim-disabling-recipes|.
Note: using function values inside buffer variables requires Neovim>=0.7.
------------------------------------------------------------------------------
*mini.nvim-color-schemes*
# Plugin colorschemes~
This plugin comes with several color schemes. All of them are a
|MiniBase16| theme created with faster version of the following Lua code:
`require('mini.base16').setup({ palette = palette, use_cterm = true })`
Activate them as regular |colorscheme| (for example, `:colorscheme minischeme`).
## minischeme~
Blue and yellow main colors with high contrast and saturation palette.
Palettes are:
- For dark 'background':
`MiniBase16.mini_palette('#112641', '#e2e98f', 75)`
- For light 'background':
`MiniBase16.mini_palette('#e2e5ca', '#002a83', 75)`
## minicyan~
Cyan and grey main colors with moderate contrast and saturation palette.
Palettes are:
- For dark 'background':
`MiniBase16.mini_palette('#0A2A2A', '#D0D0D0', 50)`
- For light 'background':
`MiniBase16.mini_palette('#C0D2D2', '#262626', 80)`
==============================================================================
------------------------------------------------------------------------------
*mini.ai*
*MiniAi*
Module for extending and creating `a`/`i` textobjects. It enhances some builtin
|text-objects| (like |a(|, |a)|, |a'|, and more), creates new ones
(like `a*`, `a<Space>`, `af`, `a?`, and more), and allows user to create their own.
Features:
- Customizable creation of `a`/`i` textobjects using Lua patterns and functions.
Supports:
- Dot-repeat.
- |v:count|.
- Different search methods (see |MiniAi.config|).
- Consecutive application (update selection without leaving Visual mode).
- Aliases for multiple textobjects.
- Comprehensive builtin textobjects (see more in |MiniAi-textobject-builtin|):
- Balanced brackets (with and without whitespace) plus alias.
- Balanced quotes plus alias.
- Function call.
- Argument.
- Tag.
- Derived from user prompt.
- Default for punctuation, digit, or whitespace single character.
- Motions for jumping to left/right edge of textobject.
- Set of specification generators to tweak some builtin textobjects (see
|MiniAi.gen_spec|).
- Treesitter textobjects (through |MiniAi.gen_spec.treesitter()| helper).
This module works by defining mappings for both `a` and `i` in Visual and
Operator-pending mode. After typing, they wait for single character user input
treated as textobject identifier and apply resolved textobject specification
(fall back to other mappings if can't find proper textobject id). For more
information see |MiniAi-textobject-specification| and |MiniAi-algorithm|.
Known issues which won't be resolved:
- Search for builtin textobjects is done mostly using Lua patterns
(regex-like approach). Certain amount of false positives is to be expected.
- During search for builtin textobjects there is no distinction if it is
inside string or comment. For example, in the following case there will
be wrong match for a function call: `f(a = ")", b = 1)`.
General rule of thumb: any instrument using available parser for document
structure (like treesitter) will usually provide more precise results. This
module has builtins mostly for plain text textobjects which are useful
most of the times (like "inside brackets", "around quotes/underscore", etc.).
For advanced use cases define function specification for custom textobjects.
What it doesn't (and probably won't) do:
- Have special operators to specially handle whitespace (like `I` and `A`
in 'targets.vim'). Whitespace handling is assumed to be done inside
textobject specification (like `i(` and `i)` handle whitespace differently).
# Setup~
This module needs a setup with `require('mini.ai').setup({})` (replace
`{}` with your `config` table). It will create global Lua table `MiniAi`
which you can use for scripting or manually (with `:lua MiniAi.*`).
See |MiniAi.config| for available config settings.
You can override runtime config settings (like `config.custom_textobjects`)
locally to buffer inside `vim.b.miniai_config` which should have same structure
as `MiniAi.config`. See |mini.nvim-buffer-local-config| for more details.
# Comparisons~
- 'wellle/targets.vim':
- Has limited support for creating own textobjects: it is constrained
to pre-defined detection rules. 'mini.ai' allows creating own rules
via Lua patterns and functions (see |MiniAi-textobject-specification|).
- Doesn't provide any programmatical API for getting information about
textobjects. 'mini.ai' does it via |MiniAi.find_textobject()|.
- Has no implementation of "moving to edge of textobject". 'mini.ai'
does it via |MiniAi.move_cursor()| and `g[` and `g]` default mappings.
- Has elaborate ways to control searching of the next textobject.
'mini.ai' relies on handful of 'config.search_method'.
- Implements `A`, `I` operators. 'mini.ai' does not by design: it is
assumed to be a property of textobject, not operator.
- Doesn't implement "function call" and "user prompt" textobjects.
'mini.ai' does (with `f` and `?` identifiers).
- Has limited support for "argument" textobject. Although it works in
most situations, it often misdetects commas as argument separator
(like if it is inside quotes or `{}`). 'mini.ai' deals with these cases.
- 'nvim-treesitter/nvim-treesitter-textobjects':
- Along with textobject functionality provides a curated and maintained
set of popular textobject queries for many languages (which can power
|MiniAi.gen_spec.treesitter()| functionality).
- Operates with custome treesitter directives (see
|lua-treesitter-directives|) allowing more fine-tuned textobjects.
- Implements only textobjects based on treesitter.
- Doesn't support |v:count|.
- Doesn't support multiple search method (basically, only 'cover').
- Doesn't support consecutive application of target textobject.
# Disabling~
To disable, set `g:miniai_disable` (globally) or `b:miniai_disable`
(for a buffer) to `v: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.
------------------------------------------------------------------------------
*MiniAi-textobject-builtin*
Builtin textobjects~
This table describes all builtin textobjects along with what they
represent. Explanation:
- `Key` represents the textobject identifier: single character which should
be typed after `a`/`i`.
- `Name` is a description of textobject.
- `Example line` contains a string for which examples are constructed. The
`*` denotes the cursor position.
- `a`/`i` describe inclusive region representing `a` and `i` textobjects.
Use numbers in separators for easier navigation.
- `2a`/`2i` describe either `2a`/`2i` (support for |v:count|) textobjects
or `a`/`i` textobject followed by another `a`/`i` textobject (consecutive
application leads to incremental selection).
Example: typing `va)` with cursor on `*` leads to selection from column 2
to column 12. Another typing `a)` changes selection to [1; 13]. Also, besides
visual selection, any |operator| can be used or `g[`/`g]` motions to move
to left/right edge of `a` textobject.
>
|Key| Name | Example line | a | i | 2a | 2i |
|---|---------------|-1234567890123456-|--------|--------|--------|--------|
| ( | Balanced () | (( *a (bb) )) | | | | |
| [ | Balanced [] | [[ *a [bb] ]] | [2;12] | [4;10] | [1;13] | [2;12] |
| { | Balanced {} | {{ *a {bb} }} | | | | |
| < | Balanced <> | << *a <bb> >> | | | | |
|---|---------------|-1234567890123456-|--------|--------|--------|--------|
| ) | Balanced () | (( *a (bb) )) | | | | |
| ] | Balanced [] | [[ *a [bb] ]] | | | | |
| } | Balanced {} | {{ *a {bb} }} | [2;12] | [3;11] | [1;13] | [2;12] |
| > | Balanced <> | << *a <bb> >> | | | | |
| b | Alias for | [( *a {bb} )] | | | | |
| | ), ], or } | | | | | |
|---|---------------|-1234567890123456-|--------|--------|--------|--------|
| " | Balanced " | "*a" " bb " | | | | |
| ' | Balanced ' | '*a' ' bb ' | | | | |
| ` | Balanced ` | `*a` ` bb ` | [1;4] | [2;3] | [6;11] | [7;10] |
| q | Alias for | '*a' " bb " | | | | |
| | ", ', or ` | | | | | |
|---|---------------|-1234567890123456-|--------|--------|--------|--------|
| ? | User prompt | e*e o e o o | [3;5] | [4;4] | [7;9] | [8;8] |
| |(typed e and o)| | | | | |
|---|---------------|-1234567890123456-|--------|--------|--------|--------|
| t | Tag | <x>*</x><y>b</y> | [1;8] | [4;4] | [9;16] |[12;12] |
|---|---------------|-1234567890123456-|--------|--------|--------|--------|
| f | Function call | f(a, g(*b, c) ) | [6;13] | [8;12] | [1;15] | [3;14] |
|---|---------------|-1234567890123456-|--------|--------|--------|--------|
| a | Argument | f(*a, g(b, c) ) | [3;5] | [3;4] | [5;14] | [7;13] |
|---|---------------|-1234567890123456-|--------|--------|--------|--------|
| | Default | | | | | |
| | (digits, | aa_*b__cc___ | [4;7] | [4;5] | [8;12] | [8;9] |
| | punctuation, | (example for _) | | | | |
| | or whitespace)| | | | | |
|---|---------------|-1234567890123456-|--------|--------|--------|--------|
<
Notes:
- All examples assume default `config.search_method`.
- Open brackets differ from close brackets by how they treat inner edge
whitespace for `i` textobject: open ignores it, close - includes.
- Default textobject is activated for identifiers from digits (0, ..., 9),
punctuation (like `_`, `*`, `,`, etc.), whitespace (space, tab, etc.).
They are designed to be treated as separators, so include only right edge
in `a` textobject. To include both edges, use custom textobjects
(see |MiniAi-textobject-specification| and |MiniAi.config|).
------------------------------------------------------------------------------
*MiniAi-glossary*
- REGION - table representing region in a buffer. Fields: <from> and
<to> for inclusive start and end positions (<to> might be `nil` to
describe empty region). Each position is also a table with line <line>
and column <col> (both start at 1). Examples:
- `{ from = { line = 1, col = 1 }, to = { line = 2, col = 1 } }`
- `{ from = { line = 10, col = 10 } }` - empty region.
- PATTERN - string describing Lua pattern.
- SPAN - interval inside a string (end-exclusive). Like [1, 5). Equal
`from` and `to` edges describe empty span at that point.
- SPAN `A = [a1, a2)` COVERS `B = [b1, b2)` if every element of
`B` is within `A` (`a1 <= b < a2`).
It also is described as B IS NESTED INSIDE A.
- NESTED PATTERN - array of patterns aimed to describe nested spans.
- SPAN MATCHES NESTED PATTERN if there is a sequence of consecutively
nested spans each matching corresponding pattern within substring of
previous span (or input string for first span). Example:
Nested patterns: `{ '%b()', '^. .* .$' }` (balanced `()` with inner space)
Input string: `( ( () ( ) ) )`
`123456789012345`
Here are all matching spans [1, 15) and [3, 13). Both [5, 7) and [8, 10)
match first pattern but not second. All other combinations of `(` and `)`
don't match first pattern (not balanced).
- COMPOSED PATTERN: array with each element describing possible pattern
(or array of them) at that place. Composed pattern basically defines all
possible combinations of nested pattern (their cartesian product).
Examples:
1. Composed pattern: `{ { '%b()', '%b[]' }, '^. .* .$' }`
Composed pattern expanded into equivalent array of nested patterns:
`{ '%b()', '^. .* .$' }` and `{ '%b[]', '^. .* .$' }`
Description: either balanced `()` or balanced `[]` but both with
inner edge space.
2. Composed pattern:
`{ { { '%b()', '^. .* .$' }, { '%b[]', '^.[^ ].*[^ ].$' } }, '.....' }`
Composed pattern expanded into equivalent array of nested patterns:
`{ '%b()', '^. .* .$', '.....' }` and
`{ '%b[]', '^.[^ ].*[^ ].$', '.....' }`
Description: either "balanced `()` with inner edge space" or
"balanced `[]` with no inner edge space", both with 5 or more characters.
- SPAN MATCHES COMPOSED PATTERN if it matches at least one nested pattern
from expanded composed pattern.
------------------------------------------------------------------------------
*MiniAi-textobject-specification*
Textobject specification has a structure of composed pattern (see
|MiniAi-glossary|) with two differences:
- Last pattern(s) should have even number of empty capture groups denoting
how the last string should be processed to extract `a` or `i` textobject:
- Zero captures mean that whole string represents both `a` and `i`.
Example: `xxx` will define textobject matching string `xxx` literally.
- Two captures represent `i` textobject inside of them. `a` - whole string.
Example: `x()x()x` defines `a` textobject to be `xxx`, `i` - middle `x`.
- Four captures define `a` textobject inside captures 1 and 4, `i` -
inside captures 2 and 3. Example: `x()()x()x()` defines `a`
textobject to be last `xx`, `i` - middle `x`.
- Allows callable objects (see |vim.is_callable()|) in certain places
(enables more complex textobjects in exchange of increase in configuration
complexity and computations):
- If specification itself is a callable, it will be called with the same
arguments as |MiniAi.find_textobject()| and should return one of:
- Composed pattern. Useful for implementing user input. Example of
simplified variant of textobject for function call with name taken
from user prompt:
>
function()
local left_edge = vim.pesc(vim.fn.input('Function name: '))
return { string.format('%s+%%b()', left_edge), '^.-%(().*()%)$' }
end
<
- Single output region. Useful to allow full control over
textobject. Will be taken as is. Example of returning whole buffer:
>
function()
local from = { line = 1, col = 1 }
local to = {
line = vim.fn.line('$'),
col = math.max(vim.fn.getline('$'):len(), 1)
}
return { from = from, to = to }
end
<
- Array of output region(s). Useful for incorporating other
instruments, like treesitter (see |MiniAi.gen_spec.treesitter()|).
The best region will be picked in the same manner as with composed
pattern (respecting options `n_lines`, `search_method`, etc.).
Example of selecting "best" line with display width more than 80:
>
function(_, _, _)
local res = {}
for i = 1, vim.api.nvim_buf_line_count(0) do
local cur_line = vim.fn.getline(i)
if vim.fn.strdisplaywidth(cur_line) > 80 then
local region = {
from = { line = i, col = 1 },
to = { line = i, col = cur_line:len() },
}
table.insert(res, region)
end
end
return res
end
<
- If there is a callable instead of assumed string pattern, it is expected
to have signature `(line, init)` and behave like `pattern:find()`.
It should return two numbers representing span in `line` next after
or at `init` (`nil` if there is no such span).
!IMPORTANT NOTE!: it means that output's `from` shouldn't be strictly
to the left of `init` (it will lead to infinite loop). Not allowed as
last item (as it should be pattern with captures).
Example of matching only balanced parenthesis with big enough width:
>
{
'%b()',
function(s, init)
if init > 1 or s:len() < 5 then return end
return 1, s:len()
end,
'^.().*().$'
}
>
More examples:
- See |MiniAi.gen_spec| for function wrappers to create commonly used
textobject specifications.
- Pair of balanced brackets from set (used for builtin `b` identifier):
`{ { '%b()', '%b[]', '%b{}' }, '^.().*().$' }`
- Imitate word ignoring digits and punctuation (supports only Latin alphabet):
`{ '()()%f[%w]%w+()[ \t]*()' }`
- Word with camel case support (also supports only Latin alphabet):
`{`
`{`
`'%u[%l%d]+%f[^%l%d]',`
`'%f[%S][%l%d]+%f[^%l%d]',`
`'%f[%P][%l%d]+%f[^%l%d]',`
`'^[%l%d]+%f[^%l%d]',`
`},`
`'^().*()$'`
`}`
- Number: `{ '%f[%d]%d+' }`
- Date in 'YYYY-MM-DD' format: `{ '()%d%d%d%d%-%d%d%-%d%d()' }`
- Lua block string: `{ '%[%[().-()%]%]' }`
------------------------------------------------------------------------------
*MiniAi-algorithm*
Algorithm design
Search for the textobjects relies on these principles:
- It uses same input data as described in |MiniAi.find_textobject()|,
i.e. whether it is `a` or `i` textobject, its identifier, reference region, etc.
- Textobject specification is constructed based on textobject identifier
(see |MiniAi-textobject-specification|).
- General search is done by converting some 2d buffer region (neighborhood
of reference region) into 1d string (each line is appended with `\n`).
Then search for a best span matching textobject specification is done
inside string (see |MiniAi-glossary|). After that, span is converted back
into 2d region. Note: first search is done inside reference region lines,
and only after that - inside its neighborhood within `config.n_lines`
(see |MiniAi.config|).
- The best matching span is done by iterating over all spans matching
textobject specification and comparing them with "current best".
Comparison also depends on reference region (tighter covering is better,
otherwise closer is better) and search method (if span is even considered).
- Extract span based on extraction pattern (last item in nested pattern).
- If task is to perform a consecutive search (`opts.n_times` is greater than 1),
steps are repeated with current best match becoming reference region.
One such additional step is also done if final region is equal to
reference region (this enables consecutive application).
Notes:
- Iteration over all matched spans is done in depth-first fashion with
respect to nested pattern.
- It is guaranteed that span is compared only once.
- For the sake of increasing functionality, during iteration over all
matching spans, some Lua patterns in composed pattern are handled
specially.
- `%bxx` (`xx` is two identical characters). It denotes balanced pair
of identical characters and results into "paired" matches. For
example, `%b""` for `"aa" "bb"` would match `"aa"` and `"bb"`, but
not middle `" "`.
- `x.-y` (`x` and `y` are different strings). It results only in matches with
smallest width. For example, `e.-o` for `e e o o` will result only in
middle `e o`. Note: it has some implications for when parts have
quantifiers (like `+`, etc.), which usually can be resolved with
frontier pattern `%f[]` (see examples in |MiniAi-textobject-specification|).
------------------------------------------------------------------------------
*MiniAi.setup()*
`MiniAi.setup`({config})
Module setup
Parameters~
{config} `(table|nil)` Module config table. See |MiniAi.config|.
Usage~
`require('mini.ai').setup({})` (replace `{}` with your `config` table)
------------------------------------------------------------------------------
*MiniAi.config*
`MiniAi.config`
Module config
Default values:
>
MiniAi.config = {
-- Table with textobject id as fields, textobject specification as values.
-- Also use this to disable builtin textobjects. See |MiniAi.config|.
custom_textobjects = nil,
-- Module mappings. Use `''` (empty string) to disable one.
mappings = {
-- Main textobject prefixes
around = 'a',
inside = 'i',
-- Next/last textobjects
around_next = 'an',
inside_next = 'in',
around_last = 'al',
inside_last = 'il',
-- Move cursor to corresponding edge of `a` textobject
goto_left = 'g[',
goto_right = 'g]',
},
-- Number of lines within which textobject is searched
n_lines = 50,
-- How to search for object (first inside current line, then inside
-- neighborhood). One of 'cover', 'cover_or_next', 'cover_or_prev',
-- 'cover_or_nearest', 'next', 'previous', 'nearest'.
search_method = 'cover_or_next',
}
<
# Options ~
## Custom textobjects ~
Each named entry of `config.custom_textobjects` is a textobject with
that identifier and specification (see |MiniAi-textobject-specification|).
They are also used to override builtin ones (|MiniAi-textobject-builtin|).
Supply non-table input to disable builtin textobject. Examples:
>
require('mini.ai').setup({
custom_textobjects = {
-- Disables function call textobject
f = false,
-- Tweaks argument textobject
a = require('mini.ai').gen_spec.argument({ brackets = { '%b()' } }),
-- Now `vax` should select `xxx` and `vix` - middle `x`
x = { 'x()x()x' },
-- Whole buffer
g = function()
local from = { line = 1, col = 1 }
local to = {
line = vim.fn.line('$'), col = vim.fn.getline('$'):len()
}
return { from = from, to = to }
end
}
})
-- Use `vim.b.miniai_config` to customize per buffer
-- Example of specification useful for Markdown files:
local spec_pair = require('mini.ai').gen_spec.pair
vim.b.miniai_config = {
custom_textobjects = {
['*'] = spec_pair('*', '*', { type = 'greedy' }),
['_'] = spec_pair('_', '_', { type = 'greedy' }),
},
}
<
There are more example specifications in |MiniAi-textobject-specification|.
## Search method~
Value of `config.search_method` defines how best match search is done.
Based on its value, one of the following matches will be selected:
- Covering match. Left/right edge is before/after left/right edge of
reference region.
- Previous match. Left/right edge is before left/right edge of reference
region.
- Next match. Left/right edge is after left/right edge of reference region.
- Nearest match. Whichever is closest among previous and next matches.
Possible values are:
- `'cover'` - use only covering match. Don't use either previous or
next; report that there is no textobject found.
- `'cover_or_next'` (default) - use covering match. If not found, use next.
- `'cover_or_prev'` - use covering match. If not found, use previous.
- `'cover_or_nearest'` - use covering match. If not found, use nearest.
- `'next'` - use next match.
- `'previous'` - use previous match.
- `'nearest'` - use nearest match.
Note: search is first performed on the reference region lines and only
after failure - on the whole neighborhood defined by `config.n_lines`. This
means that with `config.search_method` not equal to `'cover'`, "previous"
or "next" textobject will end up as search result if they are found on
first stage although covering match might be found in bigger, whole
neighborhood. This design is based on observation that most of the time
operation is done within reference region lines (usually cursor line).
Here is an example of what `a)` textobject is based on a value of
`'config.search_method'` when cursor is inside `bbb` word:
- `'cover'`: `(a) bbb (c)` -> none
- `'cover_or_next'`: `(a) bbb (c)` -> `(c)`
- `'cover_or_prev'`: `(a) bbb (c)` -> `(a)`
- `'cover_or_nearest'`: depends on cursor position.
For first and second `b` - as in `cover_or_prev` (as previous match is
nearer), for third - as in `cover_or_next` (as next match is nearer).
- `'next'`: `(a) bbb (c)` -> `(c)`. Same outcome for `(bbb)`.
- `'prev'`: `(a) bbb (c)` -> `(a)`. Same outcome for `(bbb)`.
- `'nearest'`: depends on cursor position (same as in `'cover_or_nearest'`).
## Mappings~
Mappings `around_next`/`inside_next` and `around_last`/`inside_last` are
essentially `around`/`inside` but using search method `'next'` and `'prev'`.
------------------------------------------------------------------------------
*MiniAi.find_textobject()*
`MiniAi.find_textobject`({ai_type}, {id}, {opts})
Find textobject region
Parameters~
{ai_type} `(string)` One of `'a'` or `'i'`.
{id} `(string)` Single character string representing textobject id. It is
used to get specification which is later used to compute textobject region.
Note: if specification is a function, it is called with all present
arguments (`opts` is populated with default arguments).
{opts} `(table|nil)` Options. Possible fields:
- <n_lines> - Number of lines within which textobject is searched.
Default: `config.n_lines` (see |MiniAi.config|).
- <n_times> - Number of times to perform a consecutive search. Each one
is done with reference region being previous found textobject region.
Default: 1.
- <reference_region> - region to try to cover (see |MiniAi-glossary|). It
is guaranteed that output region will not be inside or equal to this one.
Default: empty region at cursor position.
- <search_method> - Search method. Default: `config.search_method`.
Return~
`(table|nil)` Region of textobject or `nil` if no textobject different
from `opts.reference_region` was consecutively found `opts.n_times` times.
------------------------------------------------------------------------------
*MiniAi.move_cursor()*
`MiniAi.move_cursor`({side}, {ai_type}, {id}, {opts})
Move cursor to edge of textobject
Parameters~
{side} `(string)` One of `'left'` or `'right'`.
{ai_type} `(string)` One of `'a'` or `'i'`.
{id} `(string)` Single character string representing textobject id.
{opts} `(table|nil)` Same as in |MiniAi.find_textobject()|.
`opts.n_times` means number of *actual* jumps (important when cursor
already on the potential jump spot).
------------------------------------------------------------------------------
*MiniAi.gen_spec*
`MiniAi.gen_spec`
Generate common textobject specifications
This is a table with function elements. Call to actually get specification.
Example: >
local gen_spec = require('mini.ai').gen_spec
require('mini.ai').setup({
custom_textobjects = {
-- Tweak argument to be recognized only inside `()` between `;`
a = gen_spec.argument({ brackets = { '%b()' }, separators = { ';' } }),
-- Tweak function call to not detect dot in function name
f = gen_spec.function_call({ name_pattern = '[%w_]' }),
-- Function definition (needs treesitter queries with these captures)
F = gen_spec.treesitter({ a = '@function.outer', i = '@function.inner' }),
-- Make `|` select both edges in non-balanced way
['|'] = gen_spec.pair('|', '|', { type = 'non-balanced' }),
}
})
------------------------------------------------------------------------------
*MiniAi.gen_spec.argument()*
`MiniAi.gen_spec.argument`({opts})
Argument specification
Argument textobject (has default `a` identifier) is a region inside
balanced bracket between allowed not excluded separators. Use this function
to tweak how it works.
Examples:
- `argument({ brackets = { '%b()' } })` will search for an argument only
inside balanced `()`.
- `argument({ separators = { ',', ';' } })` will consider both `,` and `;`
to be separators.
- `argument({ exclude_regions = { '%b()' } })` will exclude separators
which are inside balanced `()` (inside outer brackets).
Parameters~
{opts} `(table|nil)` Options. Allowed fields:
- <brackets> - table with patterns for outer balanced brackets.
Default: `{ '%b()', '%b[]', '%b{}' }` (any `()`, `[]`, or `{}` can
enclose arguments).
- <separators> - table with single character separators.
Default: `{ ',' }` (arguments are separated with `,`).
- <exclude_regions> - table with patterns for regions inside which
separators will be ignored.
Default: `{ '%b""', "%b''", '%b()', '%b[]', '%b{}' }` (separators
inside balanced quotes or brackets are ignored).
------------------------------------------------------------------------------
*MiniAi.gen_spec.function_call()*
`MiniAi.gen_spec.function_call`({opts})
Function call specification
Function call textobject (has default `f` identifier) is a region with some
characters followed by balanced `()`. Use this function to tweak how it works.
Example:
- `function_call({ name_pattern = '[%w_]' })` will recognize function name with
only alphanumeric or underscore (not dot).
Parameters~
{opts} `(table|nil)` Optsion. Allowed fields:
- <name_pattern> - string pattern of character set allowed in function name.
Default: `'[%w_%.]'` (alphanumeric, underscore, or dot).
Note: should be enclosed in `[]`.
------------------------------------------------------------------------------
*MiniAi.gen_spec.pair()*
`MiniAi.gen_spec.pair`({left}, {right}, {opts})
Pair specification
Use it to define textobject for region surrounded with `left` from left and
`right` from right. The `a` textobject includes both edges, `i` - excludes them.
Region can be one of several types (controlled with `opts.type`). All
examples are for default search method, `a` textobject, and use `'_'` as
both `left` and `right`:
- Non-balanced (`{ type = 'non-balanced' }`), default. Equivalent to using
`x.-y` as first pattern. Example: on line '_a_b_c_' it consecutively
matches '_a_', '_b_', '_c_'.
- Balanced (`{ type = 'balanced' }`). Equivalent to using `%bxy` as first
pattern. Example: on line '_a_b_c_' it consecutively matches '_a_', '_c_'.
Note: both `left` and `right` should be single character.
- Greedy (`{ type = 'greedy' }`). Like non-balanced but will select maximum
consecutive `left` and `right` edges. Example: on line '__a__b_' it
consecutively selects '__a__' and '__b_'. Note: both `left` and `right`
should be single character.
Parameters~
{left} `(string)` Left edge.
{right} `(string)` Right edge.
{opts} `(table|nil)` Options. Possible fields:
- <type> - Type of a pair. One of `'non-balanced'` (default), `'balanced'`,
`'greedy'`.
------------------------------------------------------------------------------
*MiniAi.gen_spec.treesitter()*
`MiniAi.gen_spec.treesitter`({ai_captures}, {opts})
Treesitter specification
This is a specification in function form. When called with a pair of
treesitter captures, it returns a specification function outputting an
array of regions that match corresponding (`a` or `i`) capture.
In order for this to work, apart from working treesitter parser for desired
language, user should have a reachable language-specific 'textobjects'
query (see |get_query()|). The most straightforward way for this is to have
'textobjects.scm' query file with treesitter captures stored in some
recognized path. This is primarily designed to be compatible with
'nvim-treesitter/nvim-treesitter-textobjects' plugin, but can be used
without it.
Two most common approaches for having a query file:
- Install 'nvim-treesitter/nvim-treesitter-textobjects'. It has curated and
well maintained builtin query files for many languages with a standardized
capture names, like `function.outer`, `function.inner`, etc.
- Manually create file 'after/queries/<language name>/textobjects.scm' in
your |$XDG_CONFIG_HOME| directory. It should contain queries with
captures (later used to define textobjects). See |lua-treesitter-query|.
To verify that query file is reachable, run (example for "lua" language)
`:lua print(vim.inspect(vim.treesitter.get_query_files('lua', 'textobjects')))`
(output should have at least an intended file).
Example configuration for function definition textobject with
'nvim-treesitter/nvim-treesitter-textobjects' captures:
>
local spec_treesitter = require('mini.ai').gen_spec.treesitter
require('mini.ai').setup({
custom_textobjects = {
F = spec_treesitter({ a = '@function.outer', i = '@function.inner' }),
o = spec_treesitter({
a = { '@conditional.outer', '@loop.outer' },
i = { '@conditional.inner', '@loop.inner' },
})
}
})
>
Notes:
- By default query is done using 'nvim-treesitter' plugin if it is present
(falls back to builtin methods otherwise). This allows for a more
advanced features (like multiple buffer languages, custom directives, etc.).
See `opts.use_nvim_treesitter` for how to disable this.
- It uses buffer's |filetype| to determine query language.
- On large files it is slower than pattern-based textobjects. Still very
fast though (one search should be magnitude of milliseconds or tens of
milliseconds on really large file).
Parameters~
{ai_captures} `(table)` Captures for `a` and `i` textobjects: table with
<a> and <i> fields with captures for `a` and `i` textobjects respectively.
Each value can be either a string capture (should start with `'@'`) or an
array of such captures (best among all matches will be chosen).
{opts} `(table)` Options. Possible values:
- <use_nvim_treesitter> - whether to try to use 'nvim-treesitter' plugin
(if present) to do the query. It implements more advanced behavior at
cost of increased execution time. Provides more coherent experience if
'nvim-treesitter-textobjects' queries are used. Default: `true`.
Return~
`(function)` Function with |MiniAi.find_textobject()| signature which
returns array of current buffer regions representing matches for
corresponding (`a` or `i`) treesitter capture.
See also~
|MiniAi-textobject-specification| for how this type of textobject
specification is processed.
|get_query()| for how query is fetched in case of no 'nvim-treesitter'.
|Query:iter_captures()| for how all query captures are iterated in case of
no 'nvim-treesitter'.
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*MiniAi.select_textobject()*
`MiniAi.select_textobject`({ai_type}, {id}, {opts})
Visually select textobject region
Does nothing if no region is found.
Parameters~
{ai_type} `(string)` One of `'a'` or `'i'`.
{id} `(string)` Single character string representing textobject id.
{opts} `(table|nil)` Same as in |MiniAi.find_textobject()|. Extra fields:
- <vis_mode> - One of `'v'`, `'V'`, `'<C-v>'`. Default: Latest visual mode.
- <operator_pending> - Whether selection is for Operator-pending mode.
Used in that mode's mappings, shouldn't be used directly. Default: `false`.
------------------------------------------------------------------------------
*MiniAi.expr_textobject()*
`MiniAi.expr_textobject`({mode}, {ai_type}, {opts})
Make expression to visually select textobject
Designed to be used inside expression mapping. No need to use directly.
Textobject identifier is taken from user single character input.
Default `n_times` option is taken from |v:count1|.
Parameters~
{mode} `(string)` One of 'x' (Visual) or 'o' (Operator-pending).
{ai_type} `(string)` One of `'a'` or `'i'`.
{opts} `(table|nil)` Same as in |MiniAi.select_textobject()|.
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*MiniAi.expr_motion()*
`MiniAi.expr_motion`({side})
Make expression for moving cursor to edge of textobject
Designed to be used inside expression mapping (powers `config.goto_left`
and `config.goto_right` mappings). No need to use directly.