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" Vim indent file
" Language: Javascript
" Maintainer: Chris Paul ( https://github.com/bounceme )
" URL: https://github.com/pangloss/vim-javascript
" Last Change: August 25, 2016
" Only load this indent file when no other was loaded.
if exists('b:did_indent')
finish
endif
let b:did_indent = 1
" Now, set up our indentation expression and keys that trigger it.
setlocal indentexpr=GetJavascriptIndent()
setlocal nolisp noautoindent nosmartindent
setlocal indentkeys=0{,0},0),0],:,!^F,o,O,e
setlocal cinoptions+=j1,J1
let b:undo_indent = 'setlocal indentexpr< smartindent< autoindent< indentkeys< cinoptions<'
" Only define the function once.
if exists('*GetJavascriptIndent')
finish
endif
let s:cpo_save = &cpo
set cpo&vim
" Get shiftwidth value
if exists('*shiftwidth')
function s:sw()
return shiftwidth()
endfunction
else
function s:sw()
return &sw
endfunction
endif
let s:line_pre = '^\s*\%(\%(\%(\/\*.\{-}\)\=\*\+\/\s*\)\=\)\@>'
let s:expr_case = s:line_pre . '\%(\%(case\>.\+\)\|default\)\s*:'
" Regex of syntax group names that are or delimit string or are comments.
let s:syng_strcom = '\%(s\%(tring\|pecial\)\|comment\|regex\|doc\|template\)'
" Regex of syntax group names that are strings or documentation.
let s:syng_comment = '\%(comment\|doc\)'
" Expression used to check whether we should skip a match with searchpair().
let s:skip_expr = "synIDattr(synID(line('.'),col('.'),0),'name') =~? '".s:syng_strcom."'"
if has('reltime')
function s:GetPair(start,end,flags,time)
return searchpair(a:start,'',a:end,a:flags,s:skip_expr,max([prevnonblank(v:lnum) - 2000,0]),a:time)
endfunction
else
function s:GetPair(start,end,flags,n)
return searchpair(a:start,'',a:end,a:flags,0,max([prevnonblank(v:lnum) - 2000,0]))
endfunction
endif
let s:line_term = '\s*\%(\%(\/\%(\%(\*.\{-}\*\/\)\|\%(\*\+\)\)\)\s*\)\=$'
" configurable regexes that define continuation lines, not including (, {, or [.
if !exists('g:javascript_opfirst')
let g:javascript_opfirst = '\%([<>,:?^%|*&]\|\/[^/*]\|\([-.+]\)\1\@!\|=>\@!\|in\%(stanceof\)\=\>\)'
endif
if !exists('g:javascript_continuation')
let g:javascript_continuation = '\%([<=,.?/*:^%|&]\|+\@<!+\|-\@<!-\|=\@<!>\|\<in\%(stanceof\)\=\)'
endif
let g:javascript_opfirst = s:line_pre . g:javascript_opfirst
let g:javascript_continuation .= s:line_term
function s:OneScope(lnum,text,add)
return a:text =~# '\%(\<else\|\<do\|=>\)' . s:line_term ? 'no b' :
\ ((a:add && a:text =~ s:line_pre . '$' && search('\%' . s:PrevCodeLine(a:lnum - 1) . 'l.)' . s:line_term)) ||
\ cursor(a:lnum, match(a:text, ')' . s:line_term)) > -1) &&
\ s:GetPair('(', ')', 'cbW', 100) > 0 && search('\C\l\+\_s*\%#','bW') &&
\ (a:add || ((expand('<cword>') !=# 'while' || !s:GetPair('\C\<do\>', '\C\<while\>','nbW',100)) &&
\ (expand('<cword>') !=# 'each' || search('\C\<for\_s\+\%#','nbW')))) ? expand('<cword>') : ''
endfunction
" https://github.com/sweet-js/sweet.js/wiki/design#give-lookbehind-to-the-reader
function s:IsBlock()
return getline(line('.'))[col('.')-1] == '{' && !search(
\ '\C\%(\<return\s*\|\%([-=~!<*+,.?^%|&\[(]\|=\@<!>\|\*\@<!\/\|\<\%(var\|const\|let\|import\|export\%(\_s\+default\)\=\|yield\|delete\|void\|t\%(ypeof\|hrow\)\|new\|in\%(stanceof\)\=\)\)\_s*\)\%#','bnW') &&
\ (!search(':\_s*\%#','bW') || (!s:GetPair('[({[]','[])}]','bW',200) || s:IsBlock()))
endfunction
" Auxiliary Functions {{{2
" Find line above 'lnum' that isn't empty, in a comment, or in a string.
function s:PrevCodeLine(lnum)
let l:lnum = prevnonblank(a:lnum)
while l:lnum
if synIDattr(synID(l:lnum,matchend(getline(l:lnum), '^\s*[^''"]'),0),'name') !~? s:syng_strcom
return l:lnum
endif
let l:lnum = prevnonblank(l:lnum - 1)
endwhile
endfunction
" Check if line 'lnum' has a balanced amount of parentheses.
function s:Balanced(lnum)
let [open_0,open_2,open_4] = [0,0,0]
let l:line = getline(a:lnum)
let pos = match(l:line, '[][(){}]', 0)
while pos != -1
if synIDattr(synID(a:lnum,pos + 1,0),'name') !~? s:syng_strcom
let idx = stridx('(){}[]', l:line[pos])
if idx % 2 == 0
let open_{idx} = open_{idx} + 1
else
let open_{idx - 1} = open_{idx - 1} - 1
endif
endif
let pos = match(l:line, '[][(){}]', pos + 1)
endwhile
return (!open_4 + !open_2 + !open_0) - 2
endfunction
" }}}
function GetJavascriptIndent()
if !exists('b:js_cache')
let b:js_cache = [0,0,0]
endif
" Get the current line.
let l:line = getline(v:lnum)
let syns = synIDattr(synID(v:lnum, 1, 0), 'name')
" start with strings,comments,etc.{{{2
if (l:line !~ '^[''"`]' && syns =~? '\%(string\|template\)') ||
\ (l:line !~ '^\s*[/*]' && syns =~? s:syng_comment)
return -1
endif
if l:line !~ '^\%(\/\*\|\s*\/\/\)' && syns =~? s:syng_comment
return cindent(v:lnum)
endif
let l:lnum = s:PrevCodeLine(v:lnum - 1)
if l:lnum == 0
return 0
endif
if (l:line =~# s:expr_case)
let cpo_switch = &cpo
set cpo+=%
let ind = cindent(v:lnum)
let &cpo = cpo_switch
return ind
endif
"}}}
" the containing paren, bracket, curly. Memoize, last lineNr either has the
" same scope or starts a new one, unless if it closed a scope.
call cursor(v:lnum,1)
if b:js_cache[0] >= l:lnum && b:js_cache[0] < v:lnum && b:js_cache[0] &&
\ (b:js_cache[0] > l:lnum || s:Balanced(l:lnum) > 0)
let num = b:js_cache[1]
elseif syns != '' && l:line[0] =~ '\s'
let pattern = syns =~? 'block' ? ['{','}'] : syns =~? 'jsparen' ? ['(',')'] :
\ syns =~? 'jsbracket'? ['\[','\]'] : ['[({[]','[])}]']
let num = s:GetPair(pattern[0],pattern[1],'bW',2000)
else
let num = s:GetPair('[({[]','[])}]','bW',2000)
endif
let b:js_cache = [v:lnum,num,line('.') == v:lnum ? b:js_cache[2] : col('.')]
if l:line =~ s:line_pre . '[])}]'
return indent(num)
endif
call cursor(b:js_cache[1],b:js_cache[2])
let swcase = getline(l:lnum) =~# s:expr_case
let pline = swcase ? getline(l:lnum) : substitute(getline(l:lnum), '\%(:\@<!\/\/.*\)$', '','')
let inb = num == 0 || num < l:lnum && ((l:line !~ s:line_pre . ',' && pline !~ ',' . s:line_term) || s:IsBlock())
let switch_offset = num == 0 || s:OneScope(num, strpart(getline(num),0,b:js_cache[2] - 1),1) !=# 'switch' ? 0 :
\ &cino !~ ':' || !has('float') ? s:sw() :
\ float2nr(str2float(matchstr(&cino,'.*:\zs[-0-9.]*')) * (&cino =~# '.*:[^,]*s' ? s:sw() : 1))
" most significant, find the indent amount
if inb && !swcase && ((l:line =~# g:javascript_opfirst || pline =~# g:javascript_continuation) ||
\ num < l:lnum && s:OneScope(l:lnum,pline,0) =~# '\<\%(for\|each\|if\|let\|no\sb\|w\%(hile\|ith\)\)\>' &&
\ l:line !~ s:line_pre . '{')
return (num > 0 ? indent(num) : -s:sw()) + (s:sw() * 2) + switch_offset
elseif num > 0
return indent(num) + s:sw() + switch_offset
endif
endfunction
let &cpo = s:cpo_save
unlet s:cpo_save
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