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" MIT License. Copyright (c) 2013-2014 Bailey Ling.
" vim: et ts=2 sts=2 sw=2
" http://got-ravings.blogspot.com/2008/10/vim-pr0n-statusline-whitespace-flags.html
" for backwards compatibility
if exists('g:airline_detect_whitespace')
let s:show_message = g:airline_detect_whitespace == 1
else
let s:show_message = get(g:, 'airline#extensions#whitespace#show_message', 1)
endif
let s:symbol = get(g:, 'airline#extensions#whitespace#symbol', g:airline_symbols.whitespace)
let s:default_checks = ['indent', 'trailing']
let s:trailing_format = get(g:, 'airline#extensions#whitespace#trailing_format', 'trailing[%s]')
let s:mixed_indent_format = get(g:, 'airline#extensions#whitespace#mixed_indent_format', 'mixed-indent[%s]')
let s:indent_algo = get(g:, 'airline#extensions#whitespace#mixed_indent_algo', 0)
let s:max_lines = get(g:, 'airline#extensions#whitespace#max_lines', 20000)
let s:enabled = get(g:, 'airline#extensions#whitespace#enabled', 1)
function! s:check_mixed_indent()
if s:indent_algo == 1
" [<tab>]<space><tab>
" spaces before or between tabs are not allowed
let t_s_t = '(^\t* +\t\s*\S)'
" <tab>(<space> x count)
" count of spaces at the end of tabs should be less then tabstop value
let t_l_s = '(^\t+ {' . &ts . ',}' . '\S)'
return search('\v' . t_s_t . '|' . t_l_s, 'nw')
else
return search('\v(^\t+ +)|(^ +\t+)', 'nw')
endif
endfunction
function! airline#extensions#whitespace#check()
if &readonly || !&modifiable || !s:enabled || line('$') > s:max_lines
return ''
endif
if !exists('b:airline_whitespace_check')
let b:airline_whitespace_check = ''
let checks = get(g:, 'airline#extensions#whitespace#checks', s:default_checks)
let trailing = 0
if index(checks, 'trailing') > -1
let trailing = search('\s$', 'nw')
endif
let mixed = 0
if index(checks, 'indent') > -1
let mixed = s:check_mixed_indent()
endif
if trailing != 0 || mixed != 0
let b:airline_whitespace_check = s:symbol
if s:show_message
if trailing != 0
let b:airline_whitespace_check .= (g:airline_symbols.space).printf(s:trailing_format, trailing)
endif
if mixed != 0
let b:airline_whitespace_check .= (g:airline_symbols.space).printf(s:mixed_indent_format, mixed)
endif
endif
endif
endif
return b:airline_whitespace_check
endfunction!
function! airline#extensions#whitespace#toggle()
if s:enabled
augroup airline_whitespace
autocmd!
augroup END
augroup! airline_whitespace
let s:enabled = 0
else
call airline#extensions#whitespace#init()
let s:enabled = 1
endif
if exists("g:airline#extensions#whitespace#enabled")
let g:airline#extensions#whitespace#enabled = s:enabled
if s:enabled && match(g:airline_section_warning, '#whitespace#check') < 0
let g:airline_section_warning .= airline#section#create(['whitespace'])
call airline#update_statusline()
endif
endif
echo 'Whitespace checking: '.(s:enabled ? 'Enabled' : 'Disabled')
endfunction
function! airline#extensions#whitespace#init(...)
call airline#parts#define_function('whitespace', 'airline#extensions#whitespace#check')
unlet! b:airline_whitespace_check
augroup airline_whitespace
autocmd!
autocmd CursorHold,BufWritePost * unlet! b:airline_whitespace_check
augroup END
endfunction
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