--- *mini.pick* Pick anything

---

--- MIT License Copyright (c) 2023 Evgeni Chasnovski

--- Features:

---

--- - Single window general purpose interface for picking element from any array.

---

--- - On demand toggleable preview and info views.

---

--- - Interactive query matching (filter+sort) with fast non-blocking default

--- which does fuzzy matching and allows other modes (|MiniPick.default_match()|).

---

--- - Built-in pickers (see |MiniPick.builtin|):

--- - Files.

--- - Pattern match (for fixed pattern or with live feedback; both allow

--- file filtering via glob patterns).

--- - Buffers.

--- - Help tags.

--- - CLI output.

--- - Resume latest picker.

---

--- - |:Pick| command to work with extensible |MiniPick.registry|.

---

--- - |vim.ui.select()| implementation. To adjust, use |MiniPick.ui_select()|

--- or save-restore `vim.ui.select` manually after calling |MiniPick.setup()|.

---

--- - Rich and customizable built-in |MiniPick-actions| when picker is active:

--- - Manually change currently focused item.

--- - Scroll vertically and horizontally.

--- - Toggle preview or info view.

--- - Mark/unmark items to choose later.

--- - Refine current matches (make them part of a new picker).

--- - And many more.

---

--- - Minimal yet flexible |MiniPick-source| specification with:

--- - Items (array, callable, or manually set later).

--- - Source name.

--- - Working directory.

--- - Matching algorithm.

--- - Way matches are shown in main window.

--- - Item preview.

--- - "On choice" action for current and marked items.

---

--- - Custom actions/keys can be configured globally, per buffer, or per picker.

---

--- - Out of the box support for |'ignorecase'| and |'smartcase'|.

---

--- - Match caching to increase responsiveness on repeated prompts.

---

--- Notes:

--- - For more pickers see |MiniExtra.pickers|.

---

--- Sources with more details:

--- - |MiniPick-overview|

--- - |MiniPick-source|

--- - |MiniPick-actions|

--- - |MiniPick-examples|

--- - |MiniPick.builtin|

--- - |MiniPick-in-other-plugins| (for plugin authors)

---

--- # Dependencies ~

---

--- Suggested dependencies (provide extra functionality, will work without them):

---

--- - Enabled |mini.icons| module to show icons near the items for actual paths.

--- Falls back to `nvim-tree/nvim-web-devicons` plugin or no icons will be used.

---

--- - *MiniPick-cli-tools* CLI tool(s) to power |MiniPick.builtin.files()|,

--- |MiniPick.builtin.grep()|, and |MiniPick.builtin.grep_live()| built-in pickers:

--- - `rg` (github.com/BurntSushi/ripgrep; enough for all three; recommended).

--- - `fd` (github.com/sharkdp/fd; for `files` only).

--- - `git` (github.com/git/git; enough for all three).

---

--- Note: CLI tools are called only with basic arguments needed to get items.

--- To customize the output, use their respective configuration approaches.

--- Here are some examples of where to start:

--- - github.com/BurntSushi/ripgrep/blob/master/GUIDE.md#configuration-file

--- - github.com/sharkdp/fd#excluding-specific-files-or-directories

--- - git-scm.com/docs/gitignore

---

--- # Setup ~

---

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

--- `{}` with your `config` table). It will create global Lua table `MiniPick`

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

---

--- See |MiniPick.config| for available config settings.

---

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

--- `vim.b.minipick_config` which should have same structure as `MiniPick.config`.

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

---

--- # Comparisons ~

---

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

--- - The main inspiration for this module, so there is significant overlap.

--- - Has three (or two) window UI (prompt, matches, preview), while this

--- module combines everything in one window. It allows more straightforward

--- customization for unusual scenarios.

--- - Default match algorithm is somewhat slow, while this module should

--- match relatively lag-free for at least 100K+ items.

--- - Has many built-in pickers, while this module has handful at its core

--- relying on other |mini.nvim| modules to provide more (see |mini.extra|).

---

--- - [ibhagwan/fzf-lua](https://github.com/ibhagwan/fzf-lua):

--- - Mostly same comparison as with `nvim-telescope/telescope.nvim`.

--- - Requires [junegunn/fzf](https://github.com/junegunn/fzf) installed to

--- power fuzzy matching, while this module provides built-in Lua matching.

---

--- # Highlight groups ~

--- *MiniPick-hl-groups*

---

--- - `MiniPickBorder` - window border.

--- - `MiniPickBorderBusy` - window border while picker is busy processing.

--- - `MiniPickBorderText` - non-prompt on border.

--- - `MiniPickCursor` - cursor during active picker (hidden by default).

--- - `MiniPickIconDirectory` - default icon for directory.

--- - `MiniPickIconFile` - default icon for file.

--- - `MiniPickHeader` - headers in info buffer and previews.

--- - `MiniPickMatchCurrent` - current matched item.

--- - `MiniPickMatchMarked` - marked matched items.

--- - `MiniPickMatchRanges` - ranges matching query elements.

--- - `MiniPickNormal` - basic foreground/background highlighting.

--- - `MiniPickPreviewLine` - target line in preview.

--- - `MiniPickPreviewRegion` - target region in preview.

--- - `MiniPickPrompt` - prompt.

--- - `MiniPickPromptCaret` - caret in prompt.

--- - `MiniPickPromptPrefix` - prefix of the prompt.

---

--- To change any highlight group, set it directly with |nvim_set_hl()|.

---

--- # Using in other plugins ~

--- *MiniPick-in-other-plugins*

---

--- - Prefer using |vim.ui.select()| for more user coverage. Use |MiniPick.start()|

--- when synchronous select or its extra capabilities is absolutely necessary.

---

--- - Perform a `_G.MiniPick ~= nil` check before using any feature. This ensures

--- that user explicitly set up the module.

---@tag MiniPick

--- To allow user customization and integration of external tools, certain |User|

--- autocommand events are triggered under common circumstances:

---

--- - `MiniPickMatch` - just after updating query matches or setting items.

--- - `MiniPickStart` - just after picker has started.

--- - `MiniPickStop` - just before picker is stopped.

---@tag MiniPick-events

--- General idea is to take array of objects, display them with interactive

--- filter/sort/navigate/preview, and allow to choose one or more items.

---

--- # How to start a picker ~

---

--- - Use |MiniPick.start()| with `opts.source` defining |MiniPick-source|.

--- Example: `MiniPick.start({ source = { items = vim.fn.readdir('.') } })`

---

--- - Use any of |MiniPick.builtin| pickers directly.

--- Example: `MiniPick.builtin.files({ tool = 'git' })`

---

--- - Use |:Pick| command which uses customizable pickers from |MiniPick.registry|.

--- Example: `:Pick files tool='git'`

---

--- # User interface ~

---

--- UI consists from a single window capable of displaying three different views:

--- - "Main" - where current query matches are shown.

--- - "Preview" - preview of current item (toggle with `<Tab>`).

--- - "Info" - general info about picker and its state (toggle with `<S-Tab>`).

---

--- Current prompt is displayed at the top left of the window border with vertical

--- line indicating caret (current input position).

---

--- Bottom part of window border displays extra visual feedback:

--- - Left part is a picker name.

--- - Right part contains information in the format >

---

--- <current index in matches> | <match count> | <marked count> / <total count>

--- <

--- When picker is busy (like if there are no items yet set or matching is active)

--- window border changes color to be `MiniPickBorderBusy` after `config.delay.busy`

--- milliseconds of idle time.

---

--- # Life cycle ~

---

--- - Type characters to filter and sort matches. It uses |MiniPick.default_match()|

--- with `query` being an array of pressed characters.

--- Overview of how it matches:

--- - If query starts with `'`, the match is exact.

--- - If query starts with `^`, the match is exact at start.

--- - If query ends with `$`, the match is exact at end.

--- - If query starts with `*`, the match is forced to be fuzzy.

--- - Otherwise match is fuzzy.

--- - Sorting is done to first minimize match width and then match start.

--- Nothing more: no favoring certain places in string, etc.

---

--- - Type special keys to perform |MiniPick-actions|. Here are some basic ones:

--- - `<C-n>` / `<Down>` moves down; `<C-p>` / `<Up>` moves up.

--- - `<Left>` / `<Right>` moves prompt caret left / right.

--- - `<S-Tab>` toggles information window with all available mappings.

--- - `<Tab>` toggles preview.

--- - `<C-x>` / `<C-a>` toggles current / all item(s) as (un)marked.

--- - `<C-Space>` / `<M-Space>` makes all matches or marked items as new picker.

--- - `<CR>` / `<M-CR>` chooses current/marked item(s).

--- - `<Esc>` / `<C-c>` stops picker.

---

--- # Implementation details ~

---

--- - Processing key typing is done via a dedicated key query process for more

--- control over their side effects. As a result, regular mappings don't work

--- here and picker's window needs to be current as long as it is shown.

--- Changing window focus leads to automatic picker stop (after small delay).

--- Not picker related screen changes require explicit |:redraw|.

--- - Any picker is non-blocking but waits to return the chosen item. Example:

--- `file = MiniPick.builtin.files()` allows other actions to be executed when

--- picker is shown while still assigning `file` with value of the chosen item.

---@tag MiniPick-overview

--- Source is defined as a `source` field inside one of (in increasing priority):

--- - |MiniPick.config| - has global effect.

--- - `vim.b.minipick_config` - has buffer-local effect.

--- - `opts.source` in picker call - has effect for that particular call.

---

--- Example of source to choose from |arglist|: >lua

---

--- { items = vim.fn.argv, name = 'Arglist' }

--- <

--- Note: this is mostly useful for writing pickers. Can safely skip if you

--- want to just use provided pickers.

---

--- # Items ~

--- *MiniPick-source.items*

---

--- `source.items` defines items to choose from. It should be one of the following:

--- - Array of objects which can have different types. Any type is allowed.

--- - `nil`. Picker waits for explicit |MiniPick.set_picker_items()| call.

--- - Callable returning any of the previous types. Will be called once on start

--- with source's `cwd` set as |current-directory|.

---

--- *MiniPick-source.items-stritems*

--- Matching is done for items array based on the string representation of its

--- elements (here called "stritems"). For single item it is computed as follows:

--- - Callable is called once with output used in next steps.

--- - String item is used as is.

--- - String <text> field of table item is used (if present).

--- - Use output of |vim.inspect()|.

---

--- Example: >lua

---

--- items = { 'aaa.txt', { text = 'bbb' }, function() return 'ccc' end }

--- -- corresponding stritems are { 'aaa.txt', 'bbb', 'ccc' }

--- <

--- Default value is `nil`, assuming it always be supplied by the caller.

---

--- *MiniPick-source.items-common*

--- There are some recommendations for common item types in order for them to work

--- out of the box with |MiniPick.default_show()|, |MiniPick.default_preview()|,

--- |MiniPick.default_choose()|, |MiniPick.default_choose_marked()|:

---

--- - Path (file or directory). Use string or `path` field of a table. Path can

--- be either absolute, relative to the `source.cwd`, or have a general URI format

--- (only if supplied as table field).

--- Examples: `'aaa.txt'`, `{ path = 'aaa.txt' }`

---

--- - Buffer. Use buffer id as number, string, or `bufnr` / `buf_id` / `buf`

--- field of a table (any name is allowed).

--- Examples: `1`, `'1'`, `{ bufnr = 1 }`, `{ buf_id = 1 }`, `{ buf = 1 }`

---

--- - Line in file or buffer. Use table representation with `lnum` field with line

--- number (starting from 1) or string in "<path>\0<line>" format (`\0` is

--- an actual null character; don't escape the slash; may need to be `\000`).

--- Examples: >lua

---

--- { path = 'aaa.txt', lnum = 2 }, 'aaa.txt\0002', { bufnr = 1, lnum = 3 }

--- <

--- - Position in file or buffer. Use table representation with `lnum` and `col`

--- fields with line and column numbers (starting from 1) or string in

--- "<path>\0<line>\0<col>" format (`\0` is an actual null character, don't

--- escape the slash; may need to be `\000`).

--- Examples: >lua

---

--- { path = 'aaa.txt', lnum = 2, col = 3 }, 'aaa.txt\0' .. '2\0003',

--- { bufnr = 1, lnum = 3, col = 4 }

--- <

--- - Region in file or buffer. Use table representation with `lnum`, `col`,

--- `end_lnum`, `end_col` fields for start and end line/column. All numbers

--- start from 1, end line is inclusive, end column is exclusive.

--- This naming is similar to |getqflist()| and |diagnostic-structure|.

--- Examples: >lua

---

--- { path = 'aaa.txt', lnum = 2, col = 3, end_lnum = 4, end_col = 5 },

--- { bufnr = 1, lnum = 3, col = 4, end_lnum = 5, end_col = 6 }

--- <

--- Note: all table items will benefit from having `text` field for better matching.

---

--- # Name ~

--- *MiniPick-source.name*

---

--- `source.name` defines the name of the picker to be used for visual feedback.

---

--- Default value is "<No name>".

---

--- # Current working directory ~

--- *MiniPick-source.cwd*

---

--- `source.cwd` is a string defining the current working directory in which

--- picker operates. It should point to a valid actually present directory path.

--- This is a part of source to allow persistent way to use relative paths,

--- i.e. not depend on current directory being constant after picker start.

--- It also makes the |MiniPick.builtin.resume()| picker more robust.

---

--- It will be set as local |current-directory| (|:lcd|) of picker's main window

--- to allow simpler code for "in window" functions (choose/preview/custom/etc.).

---

--- Default value is |current-directory|.

---

--- # Match ~

--- *MiniPick-source.match*

---

--- `source.match` is a callable defining how stritems

--- (see |MiniPick-source.items-stritems|) are matched (filtered and sorted) based

--- on the query.

---

--- It will be called with the following arguments:

--- - `stritems` - all available stritems for current picker.

--- - `inds` - array of `stritems` indexes usually pointing at current matches.

--- It does point to current matches in the case of interactively appending

--- character at the end of the query. It assumes that matches for such bigger

--- query is a subset of previous matches (implementation can ignore it).

--- This can be utilized to increase performance by checking fewer stritems.

--- - `query` - array of strings. Usually (like is common case of user interactively

--- typing query) each string represents one character. However, any strings are

--- allowed, as query can be set with |MiniPick.set_picker_query()|.

---

--- It should either return array of match indexes for stritems elements matching

--- the query (synchronous) or explicitly use |MiniPick.set_picker_match_inds()|

--- to set them (may be asynchronous).

---

--- Notes:

--- - The result can be any array of `stritems` indexes, i.e. not necessarily

--- a subset of input `inds`.

---

--- - Both `stritems` and `query` depend on values of |'ignorecase'| and |'smartcase'|.

--- If query shows "ignore case" properties (only |'ignorecase'| is set or both

--- |'ignorecase'| / |'smartcase'| are set and query has only lowercase characters),

--- then `stritems` and `query` will have only lowercase characters.

--- This allows automatic support for case insensitive matching while being

--- faster and having simpler match function implementation.

---

--- - Writing custom `source.match` usually means also changing |MiniPick-source.show|

--- because it is used to highlight stritems parts actually matching the query.

---

--- Example of simple "exact" `match()` preserving initial order: >lua

---

--- local match_exact = function(stritems, inds, query)

--- local prompt_pattern = vim.pesc(table.concat(query))

--- local f = function(i) return stritems[i]:find(prompt_pattern) ~= nil end

--- return vim.tbl_filter(f, inds)

--- end

--- -- For non-blocking version see `:h MiniPick.poke_is_picker_active()`

--- <

--- Default value is |MiniPick.default_match()|.

---

--- # Show ~

--- *MiniPick-source.show*

---

--- `source.show` is a callable defining how matched items are shown in the window.

---

--- It will be called with the following arguments:

--- - `buf_id` - identifier of the target buffer.

--- - `items_to_show` - array of actual items to be shown in `buf_id`. This is

--- a subset of currently matched items computed to fit in current window view.

--- - `query` - array of strings. Same as in `source.match`.

---

--- It should update buffer `buf_id` to visually represent `items_to_show`

--- __one item per line starting from line one__ (it shouldn't depend on

--- `options.content_from_bottom`). This also includes possible visualization

--- of which parts of stritem actually matched query.

---

--- Example (assuming string items; without highlighting): >lua

---

--- local show_prepend = function(buf_id, items_arr, query)

--- local lines = vim.tbl_map(function(x) return 'Item: ' .. x end, items_arr)

--- vim.api.nvim_buf_set_lines(buf_id, 0, -1, false, lines)

--- end

--- <

--- Default value is |MiniPick.default_show()|.

---

--- # Preview ~

--- *MiniPick-source.preview*

---

--- `source.preview` is a callable defining how item preview is done.

---

--- It will be called with the following arguments:

--- - `buf_id` - identifier of the target buffer. Note: for every separate instance

--- of item previewing new scratch buffer is be created.

--- - `item` - item to preview.

---

--- It should update buffer `buf_id` to visually represent `item`. It can also

--- directly set another buffer in picker's main window, but usually it is more

--- robust to update given `buf_id` directly.

---

--- Example: >lua

---

--- local preview_inspect = function(buf_id, item)

--- local lines = vim.split(vim.inspect(item), '\n')

--- vim.api.nvim_buf_set_lines(buf_id, 0, -1, false, lines)

--- end

--- <

--- Default value is |MiniPick.default_preview()|.

---

--- # Choose an item ~

--- *MiniPick-source.choose*

---

--- `source.choose` is a callable defining what to do when an item is chosen.

---

--- It will be called with the following arguments:

--- - `item` - chosen item. Always non-`nil`.

---

--- It should perform any intended "choose" action for an item and return

--- a value indicating whether picker should continue (i.e. not stop):

--- `nil` and `false` will stop picker, other values will continue.

---

--- Notes:

--- - It is called when picker window is still current. Use `windows.target` value

--- from |MiniPick.get_picker_state()| output to do something with target window.

---

--- Example: >lua

---

--- local choose_file_continue = function(item)

--- if vim.fn.filereadable(item) == 0 then return end

--- vim.api.nvim_win_call(

--- MiniPick.get_picker_state().windows.target,

--- function() vim.cmd('edit ' .. item) end

--- )

--- return true

--- end

--- <

--- Default value is |MiniPick.default_choose()|.

---

--- # Choose marked items ~

--- *MiniPick-source.choose_marked*

---

--- `source.choose_marked` is a callable defining what to do when marked items

--- (see |MiniPick-actions-mark|) are chosen. Serves as a companion to

--- `source.choose` which can choose several items.

---

--- It will be called with the following arguments:

--- - `items_marked` - array of marked items. Can be empty.

---

--- It should perform any intended "choose" action for several items and return

--- a value indicating whether picker should continue (i.e. not stop):

--- `nil` and `false` will stop picker, other values will continue.

---

--- Notes:

--- - It is called when picker window is still current. Use `windows.target` value

--- from |MiniPick.get_picker_state()| output to do something with target window.

---

--- Example: >lua

---

--- local choose_marked_print = function(items) print(vim.inspect(items)) end

--- <

--- Default value is |MiniPick.default_choose_marked()|.

---@tag MiniPick-source

--- When picker is active, `mappings` table defines a set of special keys which when

--- pressed will execute certain actions. Those can be of two types:

--- - Built-in: actions present in default `config.mappings`. Can be only overridden

--- with a different key.

--- - Custom: user defined actions. Should be a table with `char` and `func` fields.

---

---

--- # Built-in ~

---

--- ## Caret ~

--- *MiniPick-actions-caret*

---

--- User can add character not only at query end, but more generally at caret.

---

--- - `mappings.caret_left` - move caret to left.

--- - `mappings.caret_right` - move caret to right.

---

--- ## Choose ~

--- *MiniPick-actions-choose*

---

--- Choose is a fundamental action that actually implements the intent of

--- calling a picker, i.e. pick an item.

---

--- - `mappings.choose` - choose as is, i.e. apply `source.choose` for current item.

--- - `mappings.choose_in_split` - make horizontal split at target window, update

--- target window to the new split, and choose.

--- - `mappings.choose_in_tabpage` - same as `choose_in_split`, but create tabpage.

--- - `mappings.choose_in_vsplit` - same as `choose_in_split`, but split vertically.

--- - `mappings.choose_marked` - choose marked items as is, i.e.

--- apply `source.choose_marked` at current marked items.

---

--- ## Delete ~

--- *MiniPick-actions-delete*

---

--- Delete actions are for deleting elements from query.

---

--- - `mappings.delete_char` - delete one character to the left.

--- - `mappings.delete_char_right` - delete one character to the right.

--- - `mappings.delete_left` - delete everything to the left (like |i_CTRL-U|).

--- - `mappings.delete_word` - delete word to the left (like |i_CTRL-W|).

---

--- ## Mark ~

--- *MiniPick-actions-mark*

---

--- Marking is an action of adding certain items to a separate list which then can

--- be chosen with `mappings.choose_marked` (for example, sent to quickfix list).

--- This is a companion to a regular choosing which can pick only one item.

---

--- - `mappings.mark` - toggle marked/unmarked state of current item.

--- - `mappings.mark_all` - toggle marked/unmarked state (mark all if not all

--- marked; unmark all otherwise) of all currently matched items.

---

--- Notes:

--- - Marks persist across queries and matches. For example, user can make a query

--- with marking all matches several times and marked items from all queries

--- will be preserved.

---

--- ## Move ~

--- *MiniPick-actions-move*

---

--- Move is a fundamental action of changing which item is current.

---

--- - `mappings.move_down` - change focus to the item below.

--- - `mappings.move_start` change focus to the first currently matched item.

--- - `mappings.move_up` - change focus to the item above.

---

--- Notes:

--- - Up and down wrap around edges: `move_down` on last item moves to first,

--- `move_up` on first moves to last.

--- - Moving when preview or info view is shown updates the view with new item.

--- - There are also hard-coded alternative keys (can be used for other actions):

--- - `<Down>` moves down.

--- - `<Home>` moves to first currently matched item.

--- - `<Up>` moves up.

---

--- ## Paste ~

--- *MiniPick-actions-paste*

---

--- Paste is an action to paste content of |registers| at caret.

---

--- - `mappings.paste` - paste from register defined by the next key press.

---

--- Notes:

--- - Does not support expression register `=`.

--- - Supports special cases of register: <C-f> (as |c_CTRL-R_CTRL-F|),

--- <C-w> (as |c_CTRL-R_CTRL-W|), <C-a> (as |c_CTRL-R_CTRL-A|),

--- <C-l> (as |c_CTRL-R_CTRL-L|).

--- - Pasting from system |clipboard| is supported for "non-streaming" paste (as

--- described in |vim.paste()|). Use terminal's key combo instead of this action.

---

--- ## Refine ~

--- *MiniPick-actions-refine*

---

--- Refine is an action that primarily executes the following:

--- - Takes certain items and makes them be all items (in order they are present).

--- - Resets query.

--- - Updates `source.match` to be the one from config.

---

--- - `mappings.refine` - refine currently matched items.

--- - `mappings.refine_marked` - refine currently marked items.

---

--- This action is useful in at least two cases:

--- - Perform consecutive "narrowing" queries. Example: to get items that contain

--- both `hello` and `world` exact matches (in no particular order) with default

--- matching, type `'hello` (notice `'` at the start) followed by <C-Space> and

--- another `'world`.

--- - Reset `match` to default. Particularly useful in |MiniPick.builtin.grep_live()|

--- and |MiniExtra.pickers.lsp()| with "workspace_symbol_live" scope.

---

--- ## Scroll ~

--- *MiniPick-actions-scroll*

---

--- Scroll is an action to either move current item focus further than to the

--- neighbor item or adjust window view to see more information.

---

--- - `mappings.scroll_down` - when matches are shown, go down by the amount of

--- visible matches. In preview and info view - scroll down as with |CTRL-F|.

--- - `mappings.scroll_left` - scroll left as with |zH|.

--- - `mappings.scroll_right` - scroll right as with |zL|.

--- - `mappings.scroll_up` - when matches are shown, go up by the amount of

--- visible matches. In preview and info view - scroll up as with |CTRL-B|.

---

--- ## Stop ~

--- *MiniPick-actions-stop*

---

--- `mappings.stop` stops the picker. <C-c> also always stops the picker.

---

---

--- ## Toggle ~

--- *MiniPick-actions-toggle*

---

--- Toggle action is a way to change view: show if target is not shown, reset to

--- main view otherwise.

---

--- - `mappings.toggle_info` - toggle info view.

--- - `mappings.toggle_preview` - toggle preview.

---

--- Note:

--- - Updating query in any way resets window view to show matches.

--- - Moving current item focus keeps preview or info view with updated item.

---

--- # Custom ~

--- *MiniPick-actions-custom*

---

--- Along with built-in actions, users can define custom actions. This can be

--- done by supplying custom elements to `mappings` table. The field defines action

--- name (used to infer an action description in info view). The value is a table

--- with the following fields:

--- - <char> `(string)` - single character acting as action trigger.

--- - <func> `(function)` - callable to be executed without arguments after

--- user presses <char>. Its return value is treated as "should stop picker

--- after execution", i.e. returning nothing, `nil`, or `false` continues

--- picker while everything else (prefer `true`) stops it.

---

--- Example of `execute` custom mapping: >lua

---

--- execute = {

--- char = '<C-e>',

--- func = function() vim.cmd(vim.fn.input('Execute: ')) end,

--- }

--- <

---@tag MiniPick-actions

--- # Disable icons ~

---

--- Disable icons in |MiniPick.builtin| pickers related to paths: >lua

---

--- local pick = require('mini.pick')

--- pick.setup({ source = { show = pick.default_show } })

--- <

--- # Switch toggle and move keys ~

--- >lua

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

--- mappings = {

--- toggle_info = '<C-k>',

--- toggle_preview = '<C-p>',

--- move_down = '<Tab>',

--- move_up = '<S-Tab>',

--- }

--- })

--- <

--- # Different window styles ~

--- >lua

--- -- Different border

--- { window = { config = { border = 'double' } } }

---

--- -- "Cursor tooltip"

--- {

--- window = {

--- config = {

--- relative = 'cursor', anchor = 'NW',

--- row = 0, col = 0, width = 40, height = 20,

--- },

--- },

--- }

---

--- -- Centered on screen

--- local win_config = function()

--- local height = math.floor(0.618 * vim.o.lines)

--- local width = math.floor(0.618 * vim.o.columns)

--- return {

--- anchor = 'NW', height = height, width = width,

--- row = math.floor(0.5 * (vim.o.lines - height)),

--- col = math.floor(0.5 * (vim.o.columns - width)),

--- }

--- end

--- { window = { config = win_config } }

--- <

---@tag MiniPick-examples

---@alias __pick_builtin_opts table|nil Options forwarded to |MiniPick.start()|.

---@alias __pick_builtin_local_opts table|nil Options defining behavior of this particular picker.

---@alias __pick_builtin_grep_globs <globs> `(table)` - array of string glob patterns to restrict search to

--- matching files. Supported only by "rg" and "git" tools, respects their

--- specific glob syntax and effects. Default: `{}` (no restriction).

--- Example: `{ '*.lua', 'lua/**' }` for Lua files and files in "lua" directory.

---@alias __pick_builtin_grep_method <method> `(string)` - pattern matching method: `"regex"` (default) or `"plain"`.

---@diagnostic disable:undefined-field

---@diagnostic disable:discard-returns

---@diagnostic disable:unused-local

---@diagnostic disable:cast-local-type

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

local MiniPick = {}

local H = {}

--- Module setup

---

--- # :Pick ~

--- *:Pick*

---

--- Calling this function creates a `:Pick` user command. It takes picker name

--- from |MiniPick.registry| as mandatory first argument and executes it with

--- following (expanded, |expandcmd()|) |<f-args>| combined in a single table.

--- To add custom pickers, update |MiniPick.registry|.

---

--- Example: >vim

---

--- :Pick files tool='git'

--- :Pick grep pattern='<cword>'

--- <

---

--- It also sets custom |vim.ui.select()| implementation to use the module.

--- See |MiniPick.ui_select()|.

---

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

---

---@usage >lua

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

--- -- OR

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

--- <

MiniPick.setup = function(config)

-- Export module

_G.MiniPick = MiniPick

-- 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()

-- Create user commands

H.create_user_commands()

-- Adjust terminal emulator's pasting with active picker

H.adjust_vim_paste()

-- Set custom implementation

vim.ui.select = MiniPick.ui_select

end

--stylua: ignore

--- Defaults ~

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

---@text # Delays ~

---

--- `config.delay` defines plugin delays (in ms). All should be strictly positive.

---

--- `delay.async` is a delay between forcing asynchronous behavior. This usually

--- means forcing |:redraw| in preview (several but limited number of times to

--- ensure visible async highlighting) and using |MiniPick.poke_is_picker_active()|

--- (for example, to stop current matching if query has updated).

--- Smaller values give smoother user experience at the cost of more computations.

---

--- `delay.busy` is a delay between when some computation starts and showing

--- visual feedback about it by making window border to have `MiniPickBorderBusy`

--- highlight group.

--- Smaller values will give feedback faster at the cost of feeling like flicker.

---

--- # Mappings ~

---

--- `config.mappings` defines keys for special actions to be triggered after certain

--- keys. See |MiniPick-actions| for more information.

---

--- # Options ~

---

--- `config.options` contains some general purpose options.

---

--- `options.content_from_bottom` is a boolean indicating whether content should be

--- shown from bottom to top. That means that best matches will be shown at

--- the bottom. Default: `false`.

---

--- `options.use_cache` is a boolean indicating whether match results should be

--- cached per prompt (i.e. concatenated query). This results into faster response

--- on repeated prompts (like when deleting query entries) at the cost of using

--- more memory. Default: `false`.

---

--- # Source ~

---

--- `config.source` defines fallbacks for source specification. For example, this

--- can be used to change default `match` to use different implementation or `show`

--- to not show icons for some |MiniPick.builtin| pickers (see |MiniPick-examples|).

--- See |MiniPick-source| for more information.

---

--- # Window ~

---

--- `config.window` contains window specific configurations.

---

--- `window.config` defines a (parts of) default floating window config for the main

--- picker window. This can be either a table overriding some parts or a callable

--- returning such table. See |MiniPick-examples| for some examples.

---

--- `window.prompt_caret` defines how caret is displayed in window's prompt.

--- Default: `'▏'`.

---

--- `window.prompt_prefix` defines what prefix is used in window's prompt.

--- Default: `'> '`.

MiniPick.config = {

-- Delays (in ms; should be at least 1)

delay = {

-- Delay between forcing asynchronous behavior

async = 10,

-- Delay between computation start and visual feedback about it

busy = 50,

},

-- Keys for performing actions. See `:h MiniPick-actions`.

mappings = {

caret_left = '<Left>',

caret_right = '<Right>',

choose = '<CR>',

choose_in_split = '<C-s>',

choose_in_tabpage = '<C-t>',

choose_in_vsplit = '<C-v>',

choose_marked = '<M-CR>',

delete_char = '<BS>',

delete_char_right = '<Del>',

delete_left = '<C-u>',

delete_word = '<C-w>',

mark = '<C-x>',

mark_all = '<C-a>',

move_down = '<C-n>',

move_start = '<C-g>',

move_up = '<C-p>',

paste = '<C-r>',

refine = '<C-Space>',

refine_marked = '<M-Space>',

scroll_down = '<C-f>',

scroll_left = '<C-h>',

scroll_right = '<C-l>',

scroll_up = '<C-b>',

stop = '<Esc>',

toggle_info = '<S-Tab>',

toggle_preview = '<Tab>',

},

-- General options

options = {

-- Whether to show content from bottom to top

content_from_bottom = false,

-- Whether to cache matches (more speed and memory on repeated prompts)

use_cache = false,

},

-- Source definition. See `:h MiniPick-source`.

source = {

items = nil,

name = nil,

cwd = nil,

match = nil,

show = nil,

preview = nil,

choose = nil,

choose_marked = nil,

},

-- Window related options

window = {

-- Float window config (table or callable returning it)

config = nil,

-- String to use as caret in prompt

prompt_caret = '▏',

-- String to use as prefix in prompt

prompt_prefix = '> ',

},

}

--minidoc_afterlines_end

--- Start picker

---

--- Notes:

--- - If there is currently an active picker, it is properly stopped and new one

--- is started "soon" in the main event-loop (see |vim.schedule()|).

--- - Current window at the moment of this function call is treated as "target".

--- It will be set back as current after |MiniPick.stop()|.

--- See |MiniPick.get_picker_state()| and |MiniPick.set_picker_target_window()|.

---

---@param opts table|nil Options. Should have same structure as |MiniPick.config|.

--- Default values are inferred from there.

--- Usually should have proper |MiniPick-source.items| defined.

---

---@return any Item which was current when picker is stopped; `nil` if aborted.

MiniPick.start = function(opts)

if MiniPick.is_picker_active() then

-- Try proper 'key query process' stop

MiniPick.stop()

-- NOTE: Needs `defer_fn()` for `stop()` to properly finish code flow and

-- not be executed before it

return vim.defer_fn(function()

-- NOTE: if `MiniPick.stop()` still didn't stop, force abort

if MiniPick.is_picker_active() then H.picker_stop(H.pickers.active, true) end

MiniPick.start(opts)

end, 0.5)

end

if vim.fn.getcmdwintype() ~= '' then return H.notify('Can not open a picker with active command window', 'WARN') end

H.cache = {}

opts = H.validate_picker_opts(opts)

local picker = H.picker_new(opts)

H.pickers.active = picker

H.picker_set_busy(picker, true)

local items = H.expand_callable(opts.source.items)

-- - Set items on next event loop to not block when computing stritems

if vim.islist(items) then vim.schedule(function() MiniPick.set_picker_items(items) end) end

H.picker_track_lost_focus(picker)

return H.picker_advance(picker)

end

--- Stop active picker

MiniPick.stop = function()

if not MiniPick.is_picker_active() then return end

H.cache.is_force_stop_advance = true

if H.cache.is_in_getcharstr then vim.api.nvim_feedkeys('\3', 't', true) end

end

--- Refresh active picker

MiniPick.refresh = function()

if not MiniPick.is_picker_active() then return end

H.picker_update(H.pickers.active, false, true)

-- Needed for something like `VimResized` (as `getcharstr` blocks redraw)

H.ensure_redraw(H.pickers.active)

end

--- Default match

---

--- Filter target stritems to contain query and sort from best to worst matches.

---

--- Implements default value for |MiniPick-source.match|.

---

--- By default (if no special modes apply) it does the following fuzzy matching:

---

--- - Stritem contains query if it contains all its elements verbatim in the same

--- order (possibly with gaps, i.e. not strictly one after another).

--- Note: empty query and empty string element is contained in any string.

---

--- - Sorting is done with the following ordering (same as in |mini.fuzzy|):

--- - The smaller the match width (end column minus start column) the better.

--- - Among same match width, the smaller start column the better.

--- - Among same match width and start column, preserve original order.

---

--- Notes:

--- - Most common interactive usage results into `query` containing one typed

--- character per element.

---

--- # Special modes ~

---

--- - Forced modes:

--- - Query starts with `*`: match the rest fuzzy (without other modes).

--- - Query starts with `'`: match the rest exactly (without gaps).

---

--- - Place modes:

--- - Query starts with `^`: match the rest exactly at start.

--- - Query ends with `$`: match the rest exactly at end.

--- - Both modes can be used simultaneously.

---

--- - Grouped: query contains at least one whitespace element. Output is computed

--- as if query is split at whitespace indexes with concatenation between them.

---

--- Precedence of modes:

--- "forced exact" = "forced fuzzy" > "place start/end" > "grouped" > "default"

---

--- # Examples ~

---

--- Assuming `stritems` are `{ '_abc', 'a_bc', 'ab_c', 'abc_' }`, here are some

--- example matches based on prompt (concatenated query): >

---

--- | Prompt | Matches |

--- |--------|------------------------|

--- | abc | All |

--- | *abc | All |

--- | | |

--- | 'abc | abc_, _abc |

--- | *'abc | None (no "'" in items) |

--- | | |

--- | ^abc | abc_ |

--- | *^abc | None (no "^" in items) |

--- | | |

--- | abc$ | _abc |