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" Remove trailing white space, see https://vi.stackexchange.com/a/456/15292
function utils#StripTrailingWhitespaces() abort
let l:save = winsaveview()
" vint: next-line -ProhibitCommandRelyOnUser -ProhibitCommandWithUnintendedSideEffect
keeppatterns %s/\v\s+$//e
call winrestview(l:save)
endfunction
" Create command alias safely, see https://stackoverflow.com/q/3878692/6064933
" The following two functions are taken from answer below on SO:
" https://stackoverflow.com/a/10708687/6064933
function! utils#Cabbrev(key, value) abort
execute printf('cabbrev <expr> %s (getcmdtype() == ":" && getcmdpos() <= %d) ? %s : %s',
\ a:key, 1+len(a:key), <SID>Single_quote(a:value), <SID>Single_quote(a:key))
endfunction
function! s:Single_quote(str) abort
return "'" . substitute(copy(a:str), "'", "''", 'g') . "'"
endfunction
" Check the syntax group in the current cursor position, see
" https://stackoverflow.com/q/9464844/6064933 and
" https://jordanelver.co.uk/blog/2015/05/27/working-with-vim-colorschemes/
function! utils#SynGroup() abort
if !exists('*synstack')
return
endif
echo map(synstack(line('.'), col('.')), 'synIDattr(v:val, "name")')
endfunction
" Check if a colorscheme exists in runtimepath.
" The following two functions are inspired by https://stackoverflow.com/a/5703164/6064933.
function! utils#HasColorscheme(name) abort
let l:pat = printf('colors/%s.vim', a:name)
return !empty(globpath(&runtimepath, l:pat))
endfunction
" Check if an Airline theme exists in runtimepath.
function! utils#HasAirlinetheme(name) abort
let l:pat = printf('autoload/airline/themes/%s.vim', a:name)
return !empty(globpath(&runtimepath, l:pat))
endfunction
" Generate random integers in the range [Low, High] in pure vimscrpt,
" adapted from https://stackoverflow.com/a/12739441/6064933
function! utils#RandInt(Low, High) abort
let l:milisec = str2nr(matchstr(reltimestr(reltime()), '\v\.\zs\d+'), 10)
return l:milisec % (a:High - a:Low + 1) + a:Low
endfunction
" Custom fold expr, adapted from https://vi.stackexchange.com/a/9094/15292
function! utils#VimFolds(lnum) abort
" get content of current line and the line below
let l:cur_line = getline(a:lnum)
let l:next_line = getline(a:lnum+1)
if l:cur_line =~# '^"{'
return '>' . (matchend(l:cur_line, '"{*') - 1)
endif
if l:cur_line ==# '' && (matchend(l:next_line, '"{*') - 1) == 1
return 0
endif
return '='
endfunction
" Custom fold text, adapted from https://vi.stackexchange.com/a/3818/15292
" and https://vi.stackexchange.com/a/6608/15292
function! utils#MyFoldText() abort
let line = getline(v:foldstart)
let folded_line_num = v:foldend - v:foldstart
let line_text = substitute(line, '^"{\+', '', 'g')
let fillcharcount = &textwidth - len(line_text) - len(folded_line_num) - 10
return printf('+%s%s%s (%s L)', repeat('-', 4), line_text, repeat('.', fillcharcount), folded_line_num)
endfunction
" Toggle cursor column
function! utils#ToggleCursorCol() abort
if &cursorcolumn
set nocursorcolumn
echo 'cursorcolumn: OFF'
else
set cursorcolumn
echo 'cursorcolumn: ON'
endif
endfunction
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