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vim-airline/doc/airline.txt
Bailey Ling c908d03cc0 document configuring with parts and sections.
2013-08-31 22:34:05 -04:00

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*airline.txt* Lean and mean statusline that's light as air
_ _ _ _ ~
__ _(_)_ __ ___ __ _(_)_ __| (_)_ __ ___ ~
\ \ / / | '_ ` _ \ _____ / _` | | '__| | | '_ \ / _ \ ~
\ V /| | | | | | |_____| (_| | | | | | | | | | __/ ~
\_/ |_|_| |_| |_| \__,_|_|_| |_|_|_| |_|\___| ~
~
==============================================================================
INTRODUCTION *airline*
vim-airline is a fast and lightweight alternative to powerline, written
in 100% vimscript with no outside dependencies.
==============================================================================
FEATURES *airline-features*
* tiny core written with extensibility in mind.
* integrates with many popular plugins.
* looks good with regular fonts, and provides configuration points so you
can use unicode or powerline symbols.
* optimized for speed; it loads in under a millisecond.
* fully customizable; if you know a little |statusline| syntax you can
tweak it to your needs.
* extremely easy to write themes.
==============================================================================
NAME *airline-name*
Where did the name come from?
I wrote this on an airplane, and since it's light as air it turned out to be a
good name :-)
==============================================================================
CONFIGURATION *airline-configuration*
There are a couple configuration values available (shown with their default
values):
* the separator used on the left side >
let g:airline_left_sep='>'
<
* the separator used on the right side >
let g:airline_right_sep='<'
<
* enable modified detection >
let g:airline_detect_modified=1
* enable paste detection >
let g:airline_detect_paste=1
<
* enable iminsert detection >
let g:airline_detect_iminsert=0
<
* determine whether inactive windows should have the left section collapsed to
only the filename of that buffer. >
let g:airline_inactive_collapse=1
<
* themes are automatically selected based on the matching colorscheme. this
can be overridden by defining a value. >
let g:airline_theme=
<
* if you want to patch the airline theme before it gets applied, you can
supply the name of a function where you can modify the palette. >
let g:airline_theme_patch_func = 'AirlineThemePatch'
function! AirlineThemePatch(palette)
if g:airline_theme == 'badwolf'
for colors in values(a:palette.inactive)
let colors[3] = 245
endfor
endif
endfunction
<
* enable/disable usage of patched powerline font symbols >
let g:airline_powerline_fonts=0
<
* define the set of text to display for each mode. >
let g:airline_mode_map = {} " see source for the defaults
" or copy paste the following into your vimrc for shortform text
let g:airline_mode_map = {
\ '__' : '-',
\ 'n' : 'N',
\ 'i' : 'I',
\ 'R' : 'R',
\ 'c' : 'C',
\ 'v' : 'V',
\ 'V' : 'V',
\ '' : 'V',
\ 's' : 'S',
\ 'S' : 'S',
\ '' : 'S',
\ }
<
* define the set of filename match queries which excludes a window from having
its statusline modified >
let g:airline_exclude_filenames = [] " see source for current list
<
* define the set of filetypes which are excluded from having its window
statusline modified >
let g:airline_exclude_filetypes = [] " see source for current list
<
* defines whether the preview window should be excluded from have its window
statusline modified (may help with plugins which use the preview window
heavily) >
let g:airline_exclude_preview = 0
<
==============================================================================
COMMANDS *airline-commands*
:AirlineTheme {theme-name} *:AirlineTheme*
Displays or changes the current theme.
:AirlineToggleWhitespace *:AirlineToggleWhitespace*
Toggles whitespace detection.
:AirlineToggle *:AirlineToggle*
Toggles between the standard `statusline`
==============================================================================
CUSTOMIZATION *airline-customization*
The following are some unicode symbols for customizing the left/right
separators, as well as the powerline font glyths.
Note: You must define the dictionary first before setting values: >
let g:airline_symbols = {}
>
" unicode symbols
let g:airline_left_sep = '»'
let g:airline_left_sep = '▶'
let g:airline_right_sep = '«'
let g:airline_right_sep = '◀'
let g:airline_symbols.linenr = '␊'
let g:airline_symbols.linenr = '␤'
let g:airline_symbols.linenr = '¶'
let g:airline_symbols.branch = '⎇'
let g:airline_symbols.paste = 'ρ'
let g:airline_symbols.paste = 'Þ'
let g:airline_symbols.paste = '∥'
let g:airline_symbols.whitespace = 'Ξ'
" powerline symbols
let g:airline_left_sep = ''
let g:airline_left_alt_sep = ''
let g:airline_right_sep = ''
let g:airline_right_alt_sep = ''
let g:airline_symbols.branch = ''
let g:airline_symbols.readonly = ''
let g:airline_symbols.linenr = ''
" old vim-powerline symbols
let g:airline_left_sep = '⮀'
let g:airline_left_alt_sep = '⮁'
let g:airline_right_sep = '⮂'
let g:airline_right_alt_sep = '⮃'
let g:airline_symbols.branch = '⭠'
let g:airline_symbols.readonly = '⭤'
let g:airline_symbols.linenr = '⭡'
<
For more intricate customizations, you can replace the predefined sections
with the usual statusline syntax.
Note: Many of these settings can also be controlled with |airline-configuration|
variables, which is useful for sections which by default host more than one
extension.
>
variable names default contents
----------------------------------------------------------------------------
let g:airline_section_a (mode, paste, iminsert)
let g:airline_section_b (hunks, branch)
let g:airline_section_c (bufferline or filename)
let g:airline_section_gutter (readonly, csv)
let g:airline_section_x (tagbar, filetype, virtualenv)
let g:airline_section_y (fileencoding, fileformat)
let g:airline_section_z (percentage, line number, column number)
let g:airline_section_warning (syntastic, whitespace)
" here is an example of how you could replace the branch indicator with
" the current working directory, followed by the filename.
let g:airline_section_b = '%{getcwd()}'
let g:airline_section_c = '%t'
<
==============================================================================
EXTENSIONS *airline-extensions*
Most extensions are enabled by default and lazily loaded when the
corresponding plugin (if any) is detected.
*airline-default*
The default extension understands all of the `g:` variables in the
|airline-configuration| section, however it also has some more fine-tuned
configuration values that you can use.
* control which sections get truncated and at what width. >
let g:airline#extensions#default#section_truncate_width = {
\ 'b': 88,
\ 'x': 60,
\ 'y': 88,
\ 'z': 45,
\ })
" Note: set to an empty dictionary to disable truncation.
let g:airline#extensions#default#section_truncate_width = {}
<
*airline-bufferline*
vim-bufferline <https://github.com/bling/vim-bufferline>
* enable/disable bufferline integration >
let g:airline#extensions#bufferline#enabled = 1
<
* determine whether bufferline will overwrite customization variables >
let g:airline#extensions#bufferline#overwrite_variables = 1
<
*airline-branch*
fugitive.vim <https://github.com/tpope/vim-fugitive>
lawrencium <https://bitbucket.org/ludovicchabant/vim-lawrencium>
* enable/disable fugitive/lawrencium integration >
let g:airline#extensions#branch#enabled = 1
<
* change the text for when no branch is detected >
let g:airline#extensions#branch#empty_message = ''
<
*airline-syntastic*
syntastic <https://github.com/scrooloose/syntastic>
* enable/disable syntastic integration >
let g:airline#extensions#syntastic#enabled = 1
<
*airline-tagbar*
tagbar <https://github.com/majutsushi/>
* enable/disable tagbar integration >
let g:airline#extensions#tagbar#enabled = 1
<
*airline-csv*
csv.vim <https://github.com/chrisbra/csv.vim>
* enable/disable csv integration for displaying the current column. >
let g:airline#extensions#csv#enabled = 1
<
* change how columns are displayed. >
let g:airline#extensions#csv#column_display = 'Number' (default)
let g:airline#extensions#csv#column_display = 'Name'
<
*airline-hunks*
vim-gitgutter <https://github.com/airblade/vim-gitgutter>
vim-signify <https://github.com/mhinz/vim-signify>
* enable/disable showing a summary of changed hunks under source control.
let g:airline#extensions#hunks#enabled = 1
<
* enable/disable showing only non-zero hunks. >
let g:airline#extensions#hunks#non_zero_only = 0
<
* set hunk count symbols. >
let g:airline#extensions#hunks#hunk_symbols = ['+', '~', '-']
<
*airline-whitespace*
* enable/disable detection of whitespace errors. >
let g:airline#extensions#whitespace#enabled = 1
<
* customize the whitespace symbol. >
let g:airline#extensions#whitespace#symbol = '!'
<
* configure which whitespace checks to enable. >
let g:airline#extensions#whitespace#checks = [ 'indent', 'trailing' ]
<
* configure whether a message should be displayed. >
let g:airline#extensions#whitespace#show_message = 1
<
* configure the formatting of the warning messages. >
let g:airline#extensions#whitespace#trailing_format = 'trailing[%s]'
let g:airline#extensions#whitespace#mixed_indent_format = 'mixed-indent[%s]'
<
*airline-ctrlp*
ctrlp <https://github.com/kien/ctrlp.vim>
* configure which mode colors should ctrlp window use (takes effect
only if the active airline theme doesn't define ctrlp colors) >
let g:airline#extensions#ctrlp#color_template = 'insert' (default)
let g:airline#extensions#ctrlp#color_template = 'normal'
let g:airline#extensions#ctrlp#color_template = 'visual'
let g:airline#extensions#ctrlp#color_template = 'replace'
<
*airline-virtualenv*
virtualenv <https://github.com/jmcantrell/vim-virtualenv>
* enable/disable virtualenv integration >
let g:airline#extensions#virtualenv#enabled = 1
==============================================================================
ADVANCED CUSTOMIZATION *airline-advanced-customization*
The defaults will accomodate the mass majority of users with minimal
configuration. However, if you want to reposition sections or contents you can
do so. All sections are composed of parts. Each part is composed of metadata
that is eventually used to render its content. For example, here is how you
define a part that invokes a function: >
call airline#parts#define_function('foo', 'GetFooText')
<
Note: Look at the source code and tests for the full API.
Once a part is defined, you can use helper functions to generate the
statuslines for each section. For example, to use the part above, we could
define a section like this: >
autocmd VimEnter *
\ let g:airline_section_a = airline#section#create(['mode', ' ', 'foo'])
<
This will create a section with the `mode`, followed by a space, and our `foo`
component. There are other functions that take care of putting in separators
in the right place for the left and right side. Have a look at the code/tests
for all available options.
Note: The use of `VimEnter` is important, because most extensions are lazily
loaded, so we must give them a chance to define their parts before we can use
them.
==============================================================================
FUNCREFS *airline-funcrefs*
vim-airline internally uses funcrefs to integrate with third party plugins,
and you can tap into this functionality to extend it for you needs. This is
the most powerful way to customize the statusline, and sometimes it may be
easier to go this route than the above methods.
Every section can have two values. The default value is the global `g:`
variable which is used in the absense of a `w:` value. This makes it very easy
to override only certain parts of the statusline by only defining window-local
variables for a subset of all sections.
*add_statusline_func*
The following is an example of how you can extend vim-airline to support a
new plugin. >
function! MyPlugin(...)
if &filetype == 'MyPluginFileType'
let w:airline_section_a = 'MyPlugin'
let w:airline_section_b = '%f'
let w:airline_section_c = '%{MyPlugin#function()}'
let g:airline_variable_referenced_in_statusline = 'foo'
endif
endfunction
call airline#add_statusline_func('MyPlugin')
<
*remove_statusline_func*
You can also remove a function as well, which is useful for when you want a
temporary override. >
call airline#remove_statusline_func('MyPlugin')
<
==============================================================================
PIPELINE *airline-pipeline*
Sometimes you want to do more than just use overrides. The statusline funcref
is invoked and passed two arguments. The first of these arguments is the
statusline builder. You can use this to build completely custom statuslines
to your liking. Here is an example: >
>
function! MyPlugin(...)
" first variable is the statusline builder
let builder = a:1
" WARNING: the API for the builder is not finalized and may change
call builder.add_section('Normal', '%f')
call builder.add_section('WarningMsg', '%{getcwd()}')
call builder.split()
call builder.add_section('airline_z', '%p%%')
" tell the core to use the contents of the builder
return 1
endfunction
<
The above example uses various some example highlight groups to demonstrate
that you can make any combination from the loaded colorscheme. However, if
you want colors to change between modes, you should use one of the section
highlight groups, e.g. `airline_a` and `airline_b`.
The second variable is the context, which is a dictionary containing various
values such as whether the statusline is active or not, and the window number.
>
context = {
'winnr': 'the window number for the statusline',
'active': 'whether the window is active or not',
}
<
*airline-pipeline-return-codes*
The pipeline accepts various return codes and can be used to determine the
next action. The following are the supported codes: >
0 the default, continue on with the next funcref
-1 do not modify the statusline
1 modify the statusline with the current contents of the builder
<
Note: Any value other than 0 will halt the pipeline and prevent the next
funcref from executing.
==============================================================================
WRITING EXTENSIONS *airline-writing-extensions*
For contributions into the plugin, here are the following guidelines:
1. For simple |&filetype| checks, they can be added directly into the
`extensions.vim` file.
2. Pretty much everything else should live as a separate file under the
`extensions/` directory.
a. Inside `extensions.vim`, add a check for some variable or command that
is always available (these must be defined in `plugin`, and _not_
`autoload` of the other plugin). If it exists, then initialize the
extension. This ensures that the extension is loaded if and only if the
user has the other plugin installed. Also, a check to
`airline#extensions#foo_plugin#enabled` should be performed to allow the
user to disable it.
b. Configuration variables for the extension should reside in the
extension, e.g. `g:airline#extensions#foo_plugin#bar_variable`.
See the source of |example.vim| for a working extension.
==============================================================================
WRITING THEMES *airline-themes*
Themes are written "close to the metal" -- you will need to know some basic
VimL syntax to write a theme, but if you've written in any programming
language before it will be easy to pick up.
The |dark.vim| theme fully documents this procedure and will guide you through
the process. The |jellybeans.vim| theme is another example of how to write a
theme, but instead of manually declaring colors, it extracts the values from
highlight groups.
==============================================================================
TROUBLESHOOTING *airline-troubleshooting*
Q. There are no colors.
A. You need to set up your terminal correctly. For more details, see
<http://vim.wikia.com/wiki/256_colors_in_vim>. Alternatively, if you want
to bypass the automatic detection of terminal colors, you can force Vim
into 256 color mode with this: >
set t_Co=256
<
Q. The statusline does not appear until I create a split.
A. This is the default setting of |laststatus|. If you want it to appear all
the time, add the following to your vimrc: >
set laststatus=2
<
Q. Powerline symbols are not showing up.
A. First, you must install patched powerline fonts. Second, you must enable
unicode in vim. >
set encoding=utf-8
<
Q. There is a pause when leaving insert mode.
A. Add the following to your vimrc. >
set ttimeoutlen=50
<
Q. The colors look a little off for some themes.
A. Certain themes are derived from the active colorscheme by extracting colors
from predefined highlight groups. These airline themes will look good for
their intended matching colorschemes, but will be hit or miss when loaded
with other colorschemes.
Solutions to other common problems can be found in the Wiki:
<https://github.com/bling/vim-airline/wiki/FAQ>
==============================================================================
CONTRIBUTIONS *airline-contributions*
Contributions and pull requests are welcome.
==============================================================================
LICENSE *airline-license*
MIT License. Copyright © 2013 Bailey Ling.
vim:tw=78:ts=8:ft=help:norl:
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