lualine.nvim/doc/lualine.txt

*lualine.txt*          fast and easy to configure statusline plugin for neovim

==============================================================================
Table of Contents                                  *lualine-table-of-contents*

1. lualine.nvim                                         |lualine-lualine.nvim|
  - Contributing                                        |lualine-contributing|
  - Performance compared to other plugins|lualine-performance-compared-to-other-plugins|
  - Installation                                        |lualine-installation|
  - Usage and customization                  |lualine-usage-and-customization|

==============================================================================
1. lualine.nvim                                         *lualine-lualine.nvim*

A blazing fast and easy to configure Neovim statusline written in Lua

`lualine.nvim` requires neovim 0.5

CONTRIBUTING                                            *lualine-contributing*

Feel free to create an issue/pr if you want to see anything else implemented.
If you have some question or need help with configuration start a discussion
<https://github.com/nvim-lualine/lualine.nvim/discussions>.

Please read CONTRIBUTING.md <./CONTRIBUTING.md> before opening a pr. You can
also help with documentation in wiki
<https://github.com/nvim-lualine/lualine.nvim/wiki>

PERFORMANCE COMPARED TO OTHER PLUGINS*lualine-performance-compared-to-other-plugins*

Unlike other statusline plugins lualine loads only defined components, nothing
else.

Startup time performance measured with an amazing plugin
dstein64/vim-startuptime <https://github.com/dstein64/vim-startuptime>

All times are measured with clean `init.vim` with only `vim-startuptime`,
`vim-plug` and given statusline plugin installed. In control just
`vim-startuptime` and`vim-plug` is installed. And measured time is complete
startuptime of vim not time spent on specific plugin. These numbers are average
of 20 runs.

│control │ lualine │lightline│ airline │
│8.943 ms│10.140 ms│12.522 ms│38.850 ms│


Last Updated On: 20-09-2021

INSTALLATION                                            *lualine-installation*

VIM-PLUG <HTTPS://GITHUB.COM/JUNEGUNN/VIM-PLUG> ~

>
    Plug 'nvim-lualine/lualine.nvim'
    " If you want to have icons in your statusline choose one of these
    Plug 'kyazdani42/nvim-web-devicons'
<


PACKER.NVIM <HTTPS://GITHUB.COM/WBTHOMASON/PACKER.NVIM> ~

>
    use {
      'nvim-lualine/lualine.nvim',
      requires = {'kyazdani42/nvim-web-devicons', opt = true}
    }
<


You’ll also need to have a patched font if you want icons.

USAGE AND CUSTOMIZATION                      *lualine-usage-and-customization*

Lualine has sections as shown below.

>
    +-------------------------------------------------+
    | A | B | C                             X | Y | Z |
    +-------------------------------------------------+
<


Each sections holds it’s components e.g. current vim’s mode.

                                     *lualine-Configuring-lualine-in-init.vim*

Configuring lualine in init.vim        All the examples below are in lua. You
                                       can use the same examples in `.vim` file
                                       by wrapping them in lua heredoc like
                                       this:


>
    lua << END
    require'lualine'.setup()
    END
<


checkout `:help lua-heredoc`.

                                                      *lualine-Default-config*

>
    require'lualine'.setup {
      options = {
        icons_enabled = true,
        theme = 'auto',
        component_separators = { left = '', right = ''},
        section_separators = { left = '', right = ''},
        disabled_filetypes = {},
        always_divide_middle = true,
      },
      sections = {
        lualine_a = {'mode'},
        lualine_b = {'branch', 'diff', 'diagnostics'},
        lualine_c = {'filename'},
        lualine_x = {'encoding', 'fileformat', 'filetype'},
        lualine_y = {'progress'},
        lualine_z = {'location'}
      },
      inactive_sections = {
        lualine_a = {},
        lualine_b = {},
        lualine_c = {'filename'},
        lualine_x = {'location'},
        lualine_y = {},
        lualine_z = {}
      },
      tabline = {},
      extensions = {}
    }
<


Default config                         If you want to get your current lualine
                                       config. you can do so with


>
    require'lualine'.get_config()
<


------------------------------------------------------------------------------

STARTING LUALINE ~

>
    require('lualine').setup()
<


------------------------------------------------------------------------------

SETTING A THEME ~

>
    options = {theme = 'gruvbox'}
<


All available themes are listed in THEMES.md <./THEMES.md>

Please create a pr if you managed to port a popular theme before me, here is
how to do it <./CONTRIBUTING.md>.

                                                  *lualine-Customizing-themes*

>
    local custom_gruvbox = require'lualine.themes.gruvbox'
    -- Change the background of lualine_c section for normal mode
    custom_gruvbox.normal.c.bg = '#112233' -- RGB colors are supported
    require'lualine'.setup{
      options = { theme  = custom_gruvbox },
      ...
    }
<


Customizing themes                     Theme structure is available here
                                       <https://github.com/nvim-lualine/lualine.nvim/wiki/Writting-a-theme>


------------------------------------------------------------------------------

SEPARATORS ~

Lualine defines two kinds of separators:


- `section_separators` - separators between sections
- `components_separators` - separators between components in sections


>
    options = {
      section_separators = { left = '', right = ''},
      component_separators = { left = '', right = ''}
    }
<


Here left means it’ll be used for left sections (a, b, c) and right means
it’ll be used for right sections (x, y, z).

                                                *lualine-Disabling-separators*

>
    options = {section_separators = '', component_separators = ''}
<


------------------------------------------------------------------------------

CHANGING COMPONENTS IN LUALINE SECTIONS ~

>
    sections = {lualine_a = {'mode'}}
<


                                                *lualine-Available-components*


- `branch` (git branch)
- `buffers` (shows currently available buffers)
- `diagnostics` (diagnostics count from your prefered source)
- `diff` (git diff status)
- `encoding` (file encoding)
- `fileformat` (file format)
- `filename`
- `filesize`
- `filetype`
- `hostname`
- `location` (location in file in line:column format)
- `mode` (vim mode)
- `progress` (%progress in file)
- `tabs` (shows currently available tabs)


                                                   *lualine-Custom-components*

LUA FUNCTIONS AS LUALINE COMPONENT

>
    local function hello()
      return [[hello world]]
    end
    sections = {lualine_a = {hello}}
<


VIM FUNCTIONS AS LUALINE COMPONENT

>
    sections = {lualine_a = {'FugitiveHead'}}
<


VIM’S STATUSLINE ITEMS AS LUALINE COMPONENT

>
    sections = {lualine_c = {'%=', '%t%m', '%3p'}}
<


VIM VARIABLES AS LUALINE COMPONENT

Variables from `g:`, `v:`, `t:`, `w:`, `b:`, `o`, `go:`, `vo:`, `to:`, `wo:`,
`bo:` scopes can be used.

See `:h lua-vim-variables` and `:h lua-vim-options` if you are not sure what to
use.

>
    sections = {lualine_a = {'g:coc_status', 'bo:filetype'}}
<


LUA EXPRESSIONS AS LUALINE COMPONENT

You can use any valid lua expression as a component including


- oneliners
- global variables
- require statements


>
    sections = {lualine_c = {"os.date('%a')", 'data', "require'lsp-status'.status()"}}
<


`data` is a global variable in this example.

------------------------------------------------------------------------------

COMPONENT OPTIONS ~

Component options can change the way a component behave. There are two kinds of
options:


- global options affecting all components
- local options affecting specific


Global options can be used as local options (can be applied to specific
components) but you cannot use local options as global. Global option used
locally overwrites the global, for example:

>
        require'lualine'.setup {
          options = {fmt = string.lower},
          sections = {lualine_a = {
            {'mode', fmt = function(str) return str:sub(1,1) end}},
                      lualine_b = {'branch'}}
        }
<


`mode` will be formatted with the passed fa=unction so only first char will be
shown. On the other hand branch will be formatted with global formatter
`string.lower` so it will be showed in lower case.

                                                   *lualine-Available-options*

                                                      *lualine-Global-options*

Global options                         These are `options` that are used in
                                       options table. They set behavior of
                                       lualine.


Values set here are treated as default for other options that work in component
level.

for example even though `icons_enabled` is a general component option. you can
set `icons_enabled` to `false` and icons will be disabled on all component. You
can still overwrite defaults set in option table by specifying the option value
in component.

>
    options = {
      theme = 'auto',              -- lualine theme
      component_separators = {left = '', right = ''},
      section_separators = {left = '', right = ''},
      disabled_filetypes = {},     -- Filetypes to disable lualine for.
      always_divide_middle = true, -- When set to true, left sections i.e. 'a','b' and 'c'
                                   -- can't take over the entire statusline even
                                   -- if neither of 'x', 'y' or 'z' are present.
    }
<


                                           *lualine-General-component-options*

General component options              These are options that control behavior
                                       at component level and are available for
                                       all components.


>
    sections = {
      lualine_a = {
        {
          'mode',
          icons_enabled = true, -- Enables the display of icons alongside the component.
          icon = nil,      -- Defines the icon to be displayed in front of the component.
    
          separator = nil, -- Determines what separator to use for the component.
                           -- When a string is provided it's treated as component_separator.
                           -- When a table is provided it's treated as section_separator.
                           -- These options can be used to set colored separators
                           -- around a component. 
                           --
                           -- The options need to be set like:
                           --   separator = { left = '', right = ''}
                           --
                           -- Where left will be placed on left side of component,
                           -- and right will be placed on its right.
                           -- Passing an empty string disables the separator.
    
          cond = nil, -- Condition function, the component is loaded when the function returns `true`.
    
          -- Custom color for the component in format
          -- here, '|' refers to 'or', meaning a different acceptable format for that placeholder e.g.:
          -- 'highlight_group_name' | {fg = '#rrggbb'|cterm_value(0-255)|'color_name(red)', bg= '#rrggbb', gui='style'}
          --
          -- Note: all other color options like diff_color including themes accept same color values
          --
          -- example:
          --   color = {fg = '#ffaa88', bg = 'grey', gui='italic,bold'},
          --   color = {fg = 204}   -- when fg/bg is skiped they default to themes fg/bg
          --   color = 'WarningMsg' -- highlight groups can also be used
          --
          color = nil, -- default is themes color for that section and mode
    
          -- This option specifies what type a component is.
          -- When it's omitted lualine will guess it for you.
          -- 
          -- Available types are:
          --   [format: type_name(example)], mod(branch/filename),
          --   stl(%f/%m), var(g:coc_status/bo:modifiable),
          --   lua_expr(lua expressions), vim_fun(viml function name)
          --
          -- lua_expr is short for lua-expression and vim_fun is short fror vim-function
          type = nil,
          padding = 1, -- Adds padding to the left and right of components.
                       -- Padding can be specified to left or right independently, e.g.:
                       --   padding = { left = left_padding, right = right_padding }
          fmt = nil,   -- Format function, formats the component's output.
        }
      }
    }
<


                                          *lualine-Component-specific-options*

Component specific options             These are options that are available on
                                       specific components. For example you
                                       have option on `diagnostics` component
                                       to specify what your diagnostic sources
                                       will be.


                                           *lualine-buffers-component-options*

>
    sections = {
      lualine_a = {
        {
          'buffers',
          show_filename_only = true,   -- Shows shortened relative path when set to false
          show_modified_status = true, -- Shows indicator then buffer is modified
          mode = 0, -- 0: Shows buffer name
                    -- 1: Shows buffer index (bufnr)
                    -- 2: Shows buffer name + buffer index (bufnr)
          max_length = vim.o.columns * 2 / 3, -- Maximum width of buffers component,
                                              -- it can also be a function that returns
                                              -- the value of `max_length` dynamically.
          filetype_names = {
            TelescopePrompt = 'Telescope',
            dashboard = 'Dashboard',
            packer = 'Packer',
            fzf = 'FZF',
            alpha = 'Alpha'
          }, -- Shows specific buffer name for that filetype ( { `filetype` = `buffer_name`, ... } )
          buffers_color = {
            -- Same values like general color option can be used here.
            active = 'lualine_{section}_normal',     -- Color for active buffer
            inactive = 'lualine_{section}_inactive', -- Color for inactive buffer
          },
        }
      }
    }
<


                                       *lualine-diagnostics-component-options*

>
    sections = {
      lualine_a = {
        {
          'diagnostics',
          -- Table of diagnostic sources, available sources are:
          --   'nvim_lsp', 'nvim_diagnostic', 'coc', 'ale', 'vim_lsp'.
          -- or a function that returns a table like:
          --   {error=error_cnt, warn=warn_cnt, info=info_cnt, hint=hint_cnt}
          sources = {'nvim_diagnostic', 'coc'},
          -- displays diagnostics from defined severity
          sections = {'error', 'warn', 'info', 'hint'},
          diagnostics_color = {
            -- Same values like general color option can be used here.
            error = 'DiagnosticError', -- Changes diagnostics' error color
            warn  = 'DiagnosticWarn',  -- Changes diagnostics' warn color
            info  = 'DiagnosticInfo',  -- Changes diagnostics' info color
            hint  = 'DiagnosticHint',  -- Changes diagnostics' hint color
          },
          symbols = {error = 'E', warn = 'W', info = 'I', hint = 'H'},
          colored = true,           -- Displays diagnostics status in color if set to true
          update_in_insert = false, -- Update diagnostics in insert mode
          always_visible = false,   -- Show diagnostics even if there are none
        }
      }
    }
<


                                              *lualine-diff-component-options*

>
    sections = {
      lualine_a = {
        {
          'diff',
          colored = true, -- Displays diff status in color if set to true
          diff_color = {
            -- Same values like general color option can be used here.
            added    = 'DiffAdd',    -- Changes the diff's added color
            modified = 'DiffChange', -- Changes the diff's modified color
            removed  = 'DiffDelete', -- Changes the diff's removed color you
          },
          symbols = {added = '+', modified = '~', removed = '-'}, -- Changes the symbols used by the diff
          source = nil, -- A function that works as a data source for diff.
                        -- It must return a table like:
                        --   {added = add_count, modified = modified_count, removed = removed_count }
                        -- or nil on failure. count <= 0 won't be displayed.
        }
      }
    }
<


                                        *lualine-fileformat-component-options*

>
    sections = {
      lualine_a = {
        {
          'fileformat',
          symbols = {
            unix = '', -- e712
            dos = '',  -- e70f
            mac = '',  -- e711
          }
        }
      }
    }
<


                                          *lualine-filename-component-options*

>
    sections = {
      lualine_a = {
        {
          'filename',
          file_status = true, -- Displays file status (readonly status, modified status)
          path = 0,           -- 0: Just the filename
                              -- 1: Relative path
                              -- 2: Absolute path
    
    
          shorting_target = 40, -- Shortens path to leave 40 spaces in the window
                                -- for other components. (terrible name, any suggestions?)
          symbols = {
            modified = '[+]',      -- Text to show when the file is modified
            readonly = '[-]',      -- Text to show when the file is non-modifiable or readonly
            unnamed = '[No Name]', -- Text to show for unnamed buffers
          }
        }
      }
    }
<


                                          *lualine-filetype-component-options*

>
    sections = {
      lualine_a = {
        {
          'filetype',
          colored = true, -- Displays filetype icon in color if set to true
          icon_only = false -- Display only an icon for filetype
        }
      }
    }
<


                                              *lualine-tabs-component-options*

>
    sections = {
      lualine_a = {
        {
          'tabs',
          max_length = vim.o.columns / 3, -- Maximum width of tabs component,
                                          -- it can also be a function that returns 
                                          -- the value of `max_length` dynamically.
          mode = 0, -- 0: Shows tab_nr
                    -- 1: Shows tab_name
                    -- 2: Shows tab_nr + tab_name
    
          tabs_color = {
            -- Same values like general color option can be used here.
            active = 'lualine_{section}_normal',   -- color for active tab
            inactive = 'lualine_{section}_inactive', -- color for inactive tab
          },
        }
      }
    }
<


------------------------------------------------------------------------------

TABLINE ~

You can use lualine to display components in tabline. The configuration for
tabline sections is exactly the same as for statusline.

>
    tabline = {
      lualine_a = {},
      lualine_b = {'branch'},
      lualine_c = {'filename'},
      lualine_x = {},
      lualine_y = {},
      lualine_z = {}
    }
<


This will show branch and filename component in top of neovim inside tabline.

lualine also provides 2 components buffers & tabs that you can use to get more
traditional tabline/bufferline.

>
    tabline = {
      lualine_a = {'buffers'},
      lualine_b = {'branch'},
      lualine_c = {'filename'},
      lualine_x = {},
      lualine_y = {},
      lualine_z = {'tabs'}
    }
<


You can also completely move your statusline to tabline by configuring
`lualine.tabline` and disabling `lualine.sections` and
`lualine.inactive_sections`.

>
    tabline = {
    ......
      },
    sections = {},
    inactive_sections = {},
<


If you want a more sophisticated tabline you can use other tabline plugins with
lualine too. For example:


- nvim-bufferline <https://github.com/akinsho/nvim-bufferline.lua>
- tabline.nvim <https://github.com/kdheepak/tabline.nvim>


tabline.nvim even uses lualines theme by default 🙌 You can find a bigger
list here <https://github.com/rockerBOO/awesome-neovim#tabline>

------------------------------------------------------------------------------

EXTENSIONS ~

Lualine extensions change statusline appearance for a window/buffer with
specified filetypes.

By default no extensions are loaded to improve performance. You can load
extensions with:

>
    extensions = {'quickfix'}
<


                                                *lualine-Available-extensions*


- chadtree
- fern
- fugitive
- fzf
- nerdtree
- nvim-tree
- quickfix
- toggleterm
- symbols-outline


                                                   *lualine-Custom-extensions*

Custom extensions                      You can define your own extensions. If
                                       you think an extension might be useful
                                       for others then please submit a pr.


>
    local my_extension = {sections = {lualine_a = {'mode'}}, filetypes = {'lua'}}
    require'lualine'.setup {extensions = {my_extension}}
<


------------------------------------------------------------------------------

DISABLING LUALINE ~

You can disable lualine for specific filetypes

>
    options = {disabled_filetypes = {'lua'}}
<




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