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" MIT License. Copyright (c) 2013-2018 Bailey Ling et al.
" vim: et ts=2 sts=2 sw=2
" http://got-ravings.blogspot.com/2008/10/vim-pr0n-statusline-whitespace-flags.html
scriptencoding utf-8
let s:show_message = get(g:, 'airline#extensions#whitespace#show_message', 1)
let s:symbol = get(g:, 'airline#extensions#whitespace#symbol', g:airline_symbols.whitespace)
let s:default_checks = ['indent', 'trailing', 'mixed-indent-file']
let s:enabled = get(g:, 'airline#extensions#whitespace#enabled', 1)
let s:skip_check_ft = {'make': ['indent', 'mixed-indent-file']}
function! s:check_mixed_indent()
let indent_algo = get(g:, 'airline#extensions#whitespace#mixed_indent_algo', 0)
if 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 than tabstop value
let t_l_s = '(^\t+ {' . &ts . ',}' . '\S)'
return search('\v' . t_s_t . '|' . t_l_s, 'nw')
elseif indent_algo == 2
return search('\v(^\t* +\t\s*\S)', 'nw')
else
return search('\v(^\t+ +)|(^ +\t+)', 'nw')
endif
endfunction
function! s:check_mixed_indent_file()
let c_like_langs = get(g:, 'airline#extensions#c_like_langs',
\ [ 'arduino', 'c', 'cpp', 'cuda', 'go', 'javascript', 'ld', 'php' ])
if index(c_like_langs, &ft) > -1
" for C-like languages: allow /** */ comment style with one space before the '*'
let head_spc = '\v(^ +\*@!)'
else
let head_spc = '\v(^ +)'
endif
let indent_tabs = search('\v(^\t+)', 'nw')
let indent_spc = search(head_spc, 'nw')
if indent_tabs > 0 && indent_spc > 0
return printf("%d:%d", indent_tabs, indent_spc)
else
return ''
endif
endfunction
function! airline#extensions#whitespace#check()
let max_lines = get(g:, 'airline#extensions#whitespace#max_lines', 20000)
if &readonly || !&modifiable || !s:enabled || line('$') > max_lines
\ || get(b:, 'airline_whitespace_disabled', 0)
return ''
endif
let skip_check_ft = extend(s:skip_check_ft,
\ get(g:, 'airline#extensions#whitespace#skip_indent_check_ft', {}), 'force')
if !exists('b:airline_whitespace_check')
let b:airline_whitespace_check = ''
let checks = get(b:, 'airline_whitespace_checks', get(g:, 'airline#extensions#whitespace#checks', s:default_checks))
let trailing = 0
let check = 'trailing'
if index(checks, check) > -1 && index(get(skip_check_ft, &ft, []), check) < 0
try
let regexp = get(g:, 'airline#extensions#whitespace#trailing_regexp', '\s$')
let trailing = search(regexp, 'nw')
catch
call airline#util#warning(printf('Whitespace: error occurred evaluating "%s"', regexp))
echomsg v:exception
return ''
endtry
endif
let mixed = 0
let check = 'indent'
if index(checks, check) > -1 && index(get(skip_check_ft, &ft, []), check) < 0
let mixed = s:check_mixed_indent()
endif
let mixed_file = ''
let check = 'mixed-indent-file'
if index(checks, check) > -1 && index(get(skip_check_ft, &ft, []), check) < 0
let mixed_file = s:check_mixed_indent_file()
endif
let long = 0
if index(checks, 'long') > -1 && &tw > 0
let long = search('\%>'.&tw.'v.\+', 'nw')
endif
if trailing != 0 || mixed != 0 || long != 0 || !empty(mixed_file)
let b:airline_whitespace_check = s:symbol
if strlen(s:symbol) > 0
let space = (g:airline_symbols.space)
else
let space = ''
endif
if s:show_message
if trailing != 0
let trailing_fmt = get(g:, 'airline#extensions#whitespace#trailing_format', '[%s]trailing')
let b:airline_whitespace_check .= space.printf(trailing_fmt, trailing)
endif
if mixed != 0
let mixed_indent_fmt = get(g:, 'airline#extensions#whitespace#mixed_indent_format', '[%s]mixed-indent')
let b:airline_whitespace_check .= space.printf(mixed_indent_fmt, mixed)
endif
if long != 0
let long_fmt = get(g:, 'airline#extensions#whitespace#long_format', '[%s]long')
let b:airline_whitespace_check .= space.printf(long_fmt, long)
endif
if !empty(mixed_file)
let mixed_indent_file_fmt = get(g:, 'airline#extensions#whitespace#mixed_indent_file_format', '[%s]mix-indent-file')
let b:airline_whitespace_check .= space.printf(mixed_indent_file_fmt, mixed_file)
endif
endif
endif
endif
return airline#util#shorten(b:airline_whitespace_check, 120, 9)
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
call airline#util#warning(printf('Whitespace checking: %s',(s:enabled ? 'Enabled' : 'Disabled')))
endfunction
function! airline#extensions#whitespace#disable()
if s:enabled
call airline#extensions#whitespace#toggle()
endif
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 * call <sid>ws_refresh()
augroup END
endfunction
function! s:ws_refresh()
if get(b:, 'airline_ws_changedtick', 0) == b:changedtick
return
endif
unlet! b:airline_whitespace_check
if get(g:, 'airline_skip_empty_sections', 0)
exe ':AirlineRefresh'
endif
let b:airline_ws_changedtick = b:changedtick
endfunction
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