mini-statusline.txt

*mini.statusline* Statusline
*MiniStatusline*

MIT License Copyright (c) 2021 Evgeni Chasnovski

==============================================================================

Features:
- Define own custom statusline structure for active and inactive windows.
  This is done with a function which should return string appropriate for
  |statusline|. Its code should be similar to default one with structure:
    - Compute string data for every section you want to be displayed.
    - Combine them in groups with |MiniStatusline.combine_groups()|.

- Built-in active mode indicator with colors.

- Sections can hide information when window is too narrow (specific window
  width is configurable per section).

# Dependencies ~

Suggested dependencies (provide extra functionality, statusline will work
without them):
- Nerd font (to support extra icons).

- Enabled |MiniGit| module for |MiniStatusline.section_git()|.
  Falls back to using 'lewis6991/gitsigns.nvim' plugin or shows nothing.

- Enabled |MiniDiff| module for |MiniStatusline.section_diff()|.
  Falls back to using 'lewis6991/gitsigns.nvim' plugin or shows nothing.

- Plugin 'nvim-tree/nvim-web-devicons' for filetype icons
  in |MiniStatusline.section_fileinfo()|. If missing, no icons will be shown.

# Setup ~

This module needs a setup with `require('mini.statusline').setup({})`
(replace `{}` with your `config` table). It will create global Lua table
`MiniStatusline` which you can use for scripting or manually (with
`:lua MiniStatusline.*`).

See |MiniStatusline.config| for `config` structure and default values. For
some content examples, see |MiniStatusline-example-content|.

You can override runtime config settings locally to buffer inside
`vim.b.ministatusline_config` which should have same structure as
`MiniStatusline.config`. See |mini.nvim-buffer-local-config| for more details.

# Highlight groups ~

Highlight depending on mode (second output from |MiniStatusline.section_mode|):
* `MiniStatuslineModeNormal` - Normal mode.
* `MiniStatuslineModeInsert` - Insert mode.
* `MiniStatuslineModeVisual` - Visual mode.
* `MiniStatuslineModeReplace` - Replace mode.
* `MiniStatuslineModeCommand` - Command mode.
* `MiniStatuslineModeOther` - other modes (like Terminal, etc.).

Highlight used in default statusline:
* `MiniStatuslineDevinfo` - for "dev info" group
  (|MiniStatusline.section_git| and |MiniStatusline.section_diagnostics|).
* `MiniStatuslineFilename` - for |MiniStatusline.section_filename| section.
* `MiniStatuslineFileinfo` - for |MiniStatusline.section_fileinfo| section.

Other groups:
* `MiniStatuslineInactive` - highliting in not focused window.

To change any highlight group, modify it directly with |:highlight|.

# Disabling ~

To disable (show empty statusline), set `vim.g.ministatusline_disable`
(globally) or `vim.b.ministatusline_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.

------------------------------------------------------------------------------
                                                *MiniStatusline-example-content*
Example content

# Default content ~

This function is used as default value for active content: >lua

  function()
    local mode, mode_hl = MiniStatusline.section_mode({ trunc_width = 120 })
    local git           = MiniStatusline.section_git({ trunc_width = 40 })
    local diff          = MiniStatusline.section_diff({ trunc_width = 75 })
    local diagnostics   = MiniStatusline.section_diagnostics({ trunc_width = 75 })
    local lsp           = MiniStatusline.section_lsp({ trunc_width = 75 })
    local filename      = MiniStatusline.section_filename({ trunc_width = 140 })
    local fileinfo      = MiniStatusline.section_fileinfo({ trunc_width = 120 })
    local location      = MiniStatusline.section_location({ trunc_width = 75 })
    local search        = MiniStatusline.section_searchcount({ trunc_width = 75 })

    return MiniStatusline.combine_groups({
      { hl = mode_hl,                  strings = { mode } },
      { hl = 'MiniStatuslineDevinfo',  strings = { git, diff, diagnostics, lsp } },
      '%<', -- Mark general truncate point
      { hl = 'MiniStatuslineFilename', strings = { filename } },
      '%=', -- End left alignment
      { hl = 'MiniStatuslineFileinfo', strings = { fileinfo } },
      { hl = mode_hl,                  strings = { search, location } },
    })
  end
<
# Show boolean options ~

To compute section string for boolean option use variation of this code
snippet inside content function (you can modify option itself, truncation
width, short and long displayed names): >lua

  local spell = vim.wo.spell and (MiniStatusline.is_truncated(120) and 'S' or 'SPELL') or ''
<
Here `x and y or z` is a common Lua way of doing ternary operator: if `x`
is `true`-ish then return `y`, if not - return `z`.

------------------------------------------------------------------------------
                                                        *MiniStatusline.setup()*
                        `MiniStatusline.setup`({config})
Module setup

Parameters ~
{config} `(table|nil)` Module config table. See |MiniStatusline.config|.

Usage ~
>lua
  require('mini.statusline').setup() -- use default config
  -- OR
  require('mini.statusline').setup({}) -- replace {} with your config table
<
------------------------------------------------------------------------------
                                                         *MiniStatusline.config*
                            `MiniStatusline.config`
Module config

Default values:
>lua
  MiniStatusline.config = {
    -- Content of statusline as functions which return statusline string. See
    -- `:h statusline` and code of default contents (used instead of `nil`).
    content = {
      -- Content for active window
      active = nil,
      -- Content for inactive window(s)
      inactive = nil,
    },

    -- Whether to use icons by default
    use_icons = true,

    -- Whether to set Vim's settings for statusline (make it always shown with
    -- 'laststatus' set to 2).
    -- To use global statusline, set this to `false` and 'laststatus' to 3.
    set_vim_settings = true,
  }
<
------------------------------------------------------------------------------
                                                       *MiniStatusline.active()*
                           `MiniStatusline.active`()
Compute content for active window

------------------------------------------------------------------------------
                                                     *MiniStatusline.inactive()*
                          `MiniStatusline.inactive`()
Compute content for inactive window

------------------------------------------------------------------------------
                                               *MiniStatusline.combine_groups()*
                   `MiniStatusline.combine_groups`({groups})
Combine groups of sections

Each group can be either a string or a table with fields `hl` (group's
highlight group) and `strings` (strings representing sections).

General idea of this function is as follows;
- String group is used as is (useful for special strings like `%<` or `%=`).
- Each table group has own highlighting in `hl` field (if missing, the
  previous one is used) and string parts in `strings` field. Non-empty
  strings from `strings` are separated by one space. Non-empty groups are
  separated by two spaces (one for each highlighting).

Parameters ~
{groups} `(table)` Array of groups.

Return ~
`(string)` String suitable for 'statusline'.

------------------------------------------------------------------------------
                                                 *MiniStatusline.is_truncated()*
                  `MiniStatusline.is_truncated`({trunc_width})
Decide whether to truncate

This basically computes window width and compares it to `trunc_width`: if
window is smaller then truncate; otherwise don't. Don't truncate by
default.

Use this to manually decide if section needs truncation or not.

Parameters ~
{trunc_width} `(number|nil)` Truncation width. If `nil`, output is `false`.

Return ~
`(boolean)` Whether to truncate.

------------------------------------------------------------------------------
                                                 *MiniStatusline.section_mode()*
                     `MiniStatusline.section_mode`({args})
Section for Vim |mode()|

Short output is returned if window width is lower than `args.trunc_width`.

Parameters ~
{args} `(table)` Section arguments.

Return ~
`(...)` Section string and mode's highlight group.

------------------------------------------------------------------------------
                                                  *MiniStatusline.section_git()*
                      `MiniStatusline.section_git`({args})
Section for Git information

Shows Git summary from |MiniGit| (should be set up; recommended). To tweak
formatting of what data is shown, modify buffer-local summary string directly
as described in |MiniGit-examples|.

If 'mini.git' is not set up, section falls back on 'lewis6991/gitsigns' data
or showing empty string.

Empty string is returned if window width is lower than `args.trunc_width`.

Parameters ~
{args} `(table)` Section arguments. Use `args.icon` to supply your own icon.

Return ~
`(string)` Section string.

------------------------------------------------------------------------------
                                                 *MiniStatusline.section_diff()*
                     `MiniStatusline.section_diff`({args})
Section for diff information

Shows diff summary from |MiniDiff| (should be set up; recommended). To tweak
formatting of what data is shown, modify buffer-local summary string directly
as described in |MiniDiff-diff-summary|.

If 'mini.diff' is not set up, section falls back on 'lewis6991/gitsigns' data
or showing empty string.

Empty string is returned if window width is lower than `args.trunc_width`.

Parameters ~
{args} `(table)` Section arguments. Use `args.icon` to supply your own icon.

Return ~
`(string)` Section string.

------------------------------------------------------------------------------
                                          *MiniStatusline.section_diagnostics()*
                  `MiniStatusline.section_diagnostics`({args})
Section for Neovim's builtin diagnostics

Shows nothing if diagnostics is disabled, no diagnostic is set, or for short
output. Otherwise uses |vim.diagnostic.get()| to compute and show number of
errors ('E'), warnings ('W'), information ('I'), and hints ('H').

Short output is returned if window width is lower than `args.trunc_width`.

Parameters ~
{args} `(table)` Section arguments. Use `args.icon` to supply your own icon.
  Use `args.signs` to use custom signs per severity level name. For example: >lua

    { ERROR = '!', WARN = '?', INFO = '@', HINT = '*' }
<
Return ~
`(string)` Section string.

------------------------------------------------------------------------------
                                                  *MiniStatusline.section_lsp()*
                      `MiniStatusline.section_lsp`({args})
Section for attached LSP servers

Shows number of LSP servers (each as separate "+" character) attached to
current buffer or nothing if none is attached.
Nothing is shown if window width is lower than `args.trunc_width`.

Parameters ~
{args} `(table)` Section arguments. Use `args.icon` to supply your own icon.

Return ~
`(string)` Section string.

------------------------------------------------------------------------------
                                             *MiniStatusline.section_filename()*
                   `MiniStatusline.section_filename`({args})
Section for file name

Show full file name or relative in short output.

Short output is returned if window width is lower than `args.trunc_width`.

Parameters ~
{args} `(table)` Section arguments.

Return ~
`(string)` Section string.

------------------------------------------------------------------------------
                                             *MiniStatusline.section_fileinfo()*
                   `MiniStatusline.section_fileinfo`({args})
Section for file information

Short output contains only buffer's 'filetype' and is returned if window
width is lower than `args.trunc_width` or buffer is not normal.

Nothing is shown if there is no 'filetype' set (treated as temporary buffer).

Parameters ~
{args} `(table)` Section arguments.

Return ~
`(string)` Section string.

------------------------------------------------------------------------------
                                             *MiniStatusline.section_location()*
                   `MiniStatusline.section_location`({args})
Section for location inside buffer

Show location inside buffer in the form:
- Normal: `'<cursor line>|<total lines>│<cursor column>|<total columns>'`
- Short: `'<cursor line>│<cursor column>'`

Short output is returned if window width is lower than `args.trunc_width`.

Parameters ~
{args} `(table)` Section arguments.

Return ~
`(string)` Section string.

------------------------------------------------------------------------------
                                          *MiniStatusline.section_searchcount()*
                  `MiniStatusline.section_searchcount`({args})
Section for current search count

Show the current status of |searchcount()|. Empty output is returned if
window width is lower than `args.trunc_width`, search highlighting is not
on (see |v:hlsearch|), or if number of search result is 0.

`args.options` is forwarded to |searchcount()|. By default it recomputes
data on every call which can be computationally expensive (although still
usually on 0.1 ms order of magnitude). To prevent this, supply
`args.options = { recompute = false }`.

Parameters ~
{args} `(table)` Section arguments.

Return ~
`(string)` Section string.


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