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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: December 4, 2017
" 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 autoindent nolisp nosmartindent
setlocal indentkeys+=0],0)
" Testable with something like:
" vim -eNs "+filetype plugin indent on" "+syntax on" "+set ft=javascript" \
" "+norm! gg=G" '+%print' '+:q!' testfile.js \
" | diff -uBZ testfile.js -
let b:undo_indent = 'setlocal indentexpr< smartindent< autoindent< indentkeys<'
" Only define the function once.
if exists('*GetJavascriptIndent')
finish
endif
let s:cpo_save = &cpo
set cpo&vim
" indent correctly if inside <script>
" vim/vim@690afe1 for the switch from cindent
" overridden with b:html_indent_script1
call extend(g:,{'html_indent_script1': 'inc'},'keep')
" Regex of syntax group names that are or delimit string or are comments.
let s:bvars = {
\ 'syng_strcom': 'string\|comment\|regex\|special\|doc\|template\%(braces\)\@!',
\ 'syng_str': 'string\|template\|special' }
" template strings may want to be excluded when editing graphql:
" au! Filetype javascript let b:syng_str = '^\%(.*template\)\@!.*string\|special'
" au! Filetype javascript let b:syng_strcom = '^\%(.*template\)\@!.*string\|comment\|regex\|special\|doc'
function s:GetVars()
call extend(b:,extend(s:bvars,{'js_cache': [0,0,0]}),'keep')
endfunction
" Get shiftwidth value
if exists('*shiftwidth')
function s:sw()
return shiftwidth()
endfunction
else
function s:sw()
return &l:shiftwidth ? &l:shiftwidth : &l:tabstop
endfunction
endif
" Performance for forwards search(): start search at pos rather than masking
" matches before pos.
let s:z = has('patch-7.4.984') ? 'z' : ''
" Expression used to check whether we should skip a match with searchpair().
let s:skip_expr = "s:SynAt(line('.'),col('.')) =~? b:syng_strcom"
let s:in_comm = s:skip_expr[:-14] . "'comment\\|doc'"
let s:rel = has('reltime')
" searchpair() wrapper
if s:rel
function s:GetPair(start,end,flags,skip)
return searchpair('\m'.a:start,'','\m'.a:end,a:flags,a:skip,s:l1,a:skip ==# 's:SkipFunc()' ? 2000 : 200)
endfunction
else
function s:GetPair(start,end,flags,skip)
return searchpair('\m'.a:start,'','\m'.a:end,a:flags,a:skip,s:l1)
endfunction
endif
function s:SynAt(l,c)
let byte = line2byte(a:l) + a:c - 1
let pos = index(s:synid_cache[0], byte)
if pos == -1
let s:synid_cache[:] += [[byte], [synIDattr(synID(a:l, a:c, 0), 'name')]]
endif
return s:synid_cache[1][pos]
endfunction
function s:ParseCino(f)
let [s, n, divider] = [strridx(&cino, a:f)+1, '', 0]
while s && &cino[ s ] =~ '[^,]'
if &cino[ s ] == '.'
let divider = 1
elseif &cino[ s ] ==# 's'
if n !~ '\d'
return n . s:sw() + 0
endif
let n = str2nr(n) * s:sw()
break
else
let [n, divider] .= [&cino[ s ], 0]
endif
let s += 1
endwhile
return str2nr(n) / max([divider, 1])
endfunction
" Optimized {skip} expr, only callable from the search loop which
" GetJavascriptIndent does to find the containing [[{(] (side-effects)
function s:SkipFunc()
if s:top_col == 1
throw 'out of bounds'
elseif s:check_in
if eval(s:skip_expr)
return 1
endif
let s:check_in = 0
elseif getline('.') =~ '\%<'.col('.').'c\/.\{-}\/\|\%>'.col('.').'c[''"]\|\\$'
if eval(s:skip_expr)
return 1
endif
elseif search('\m`\|\${\|\*\/','nW'.s:z,s:looksyn)
if eval(s:skip_expr)
let s:check_in = 1
return 1
endif
else
let s:synid_cache[:] += [[line2byte('.') + col('.') - 1], ['']]
endif
let [s:looksyn, s:top_col] = getpos('.')[1:2]
endfunction
function s:AlternatePair()
let [pat, l:for] = ['[][(){};]', 2]
while s:SearchLoop(pat,'bW','s:SkipFunc()')
if s:LookingAt() == ';'
if !l:for
if s:GetPair('{','}','bW','s:SkipFunc()')
return
endif
break
else
let [pat, l:for] = ['[{}();]', l:for - 1]
endif
else
let idx = stridx('])}',s:LookingAt())
if idx == -1
return
elseif !s:GetPair(['\[','(','{'][idx],'])}'[idx],'bW','s:SkipFunc()')
break
endif
endif
endwhile
throw 'out of bounds'
endfunction
function s:Nat(int)
return a:int * (a:int > 0)
endfunction
function s:LookingAt()
return getline('.')[col('.')-1]
endfunction
function s:Token()
return s:LookingAt() =~ '\k' ? expand('<cword>') : s:LookingAt()
endfunction
function s:PreviousToken(...)
let [l:pos, tok] = [getpos('.'), '']
if search('\m\k\{1,}\|\S','ebW')
if getline('.')[col('.')-2:col('.')-1] == '*/'
if eval(s:in_comm) && !s:SearchLoop('\S\ze\_s*\/[/*]','bW',s:in_comm)
call setpos('.',l:pos)
else
let tok = s:Token()
endif
else
let two = a:0 || line('.') != l:pos[1] ? strridx(getline('.')[:col('.')],'//') + 1 : 0
if two && eval(s:in_comm)
call cursor(0,two)
let tok = s:PreviousToken(1)
if tok is ''
call setpos('.',l:pos)
endif
else
let tok = s:Token()
endif
endif
endif
return tok
endfunction
function s:Pure(f,...)
return eval("[call(a:f,a:000),cursor(a:firstline,".col('.').")][0]")
endfunction
function s:SearchLoop(pat,flags,expr)
return s:GetPair(a:pat,'\_$.',a:flags,a:expr)
endfunction
function s:ExprCol()
if getline('.')[col('.')-2] == ':'
return 1
endif
let bal = 0
while s:SearchLoop('[{}?:]','bW',s:skip_expr)
if s:LookingAt() == ':'
let bal -= !search('\m:\%#','bW')
elseif s:LookingAt() == '?'
if getline('.')[col('.'):col('.')+1] =~ '^\.\d\@!'
" ?. conditional chain, not ternary start
elseif !bal
return 1
else
let bal += 1
endif
elseif s:LookingAt() == '{'
return !s:IsBlock()
elseif !s:GetPair('{','}','bW',s:skip_expr)
break
endif
endwhile
endfunction
" configurable regexes that define continuation lines, not including (, {, or [.
let s:opfirst = '^' . get(g:,'javascript_opfirst',
\ '\C\%([<>=,.?^%|/&]\|\([-:+]\)\1\@!\|\*\+\|!=\|in\%(stanceof\)\=\>\)')
let s:continuation = get(g:,'javascript_continuation',
\ '\C\%([<=,.~!?/*^%|&:]\|+\@<!+\|-\@<!-\|=\@<!>\|\<\%(typeof\|new\|delete\|void\|in\|instanceof\|await\)\)') . '$'
function s:Continues()
let tok = matchstr(strpart(getline('.'),col('.')-15,15),s:continuation)
if tok =~ '[a-z:]'
return tok == ':' ? s:ExprCol() : s:PreviousToken() != '.'
elseif tok !~ '[/>]'
return tok isnot ''
endif
return s:SynAt(line('.'),col('.')) !~? (tok == '>' ? 'jsflow\|^html' : 'regex')
endfunction
" Check if line 'lnum' has a balanced amount of parentheses.
function s:Balanced(lnum,line)
let l:open = 0
let pos = match(a:line, '[][(){}]')
while pos != -1
if s:SynAt(a:lnum,pos + 1) !~? b:syng_strcom
let l:open += matchend(a:line[pos],'[[({]')
if l:open < 0
return
endif
endif
let pos = match(a:line, !l:open ? '[][(){}]' : '()' =~ a:line[pos] ?
\ '[()]' : '{}' =~ a:line[pos] ? '[{}]' : '[][]', pos + 1)
endwhile
return !l:open
endfunction
function s:OneScope()
if s:LookingAt() == ')' && s:GetPair('(', ')', 'bW', s:skip_expr)
let tok = s:PreviousToken()
return (count(split('for if let while with'),tok) ||
\ tok =~# '^await$\|^each$' && s:PreviousToken() ==# 'for') &&
\ s:Pure('s:PreviousToken') != '.' && !(tok == 'while' && s:DoWhile())
elseif s:Token() =~# '^else$\|^do$'
return s:Pure('s:PreviousToken') != '.'
elseif strpart(getline('.'),col('.')-2,2) == '=>'
call cursor(0,col('.')-1)
return s:PreviousToken() != ')' || s:GetPair('(', ')', 'bW', s:skip_expr)
endif
endfunction
function s:DoWhile()
let cpos = searchpos('\m\<','cbW')
while s:SearchLoop('\C[{}]\|\<\%(do\|while\)\>','bW',s:skip_expr)
if s:LookingAt() =~ '\a'
if s:Pure('s:IsBlock')
if s:LookingAt() ==# 'd'
return 1
endif
break
endif
elseif s:LookingAt() != '}' || !s:GetPair('{','}','bW',s:skip_expr)
break
endif
endwhile
call call('cursor',cpos)
endfunction
" returns total offset from braceless contexts. 'num' is the lineNr which
" encloses the entire context, 'cont' if whether a:firstline is a continued
" expression, which could have started in a braceless context
function s:IsContOne(cont)
let [l:num, pind] = b:js_cache[1] ?
\ [b:js_cache[1], indent(b:js_cache[1]) + s:sw()] : [1,0]
let [ind, b_l] = [indent('.') + !a:cont, 0]
while line('.') > l:num && ind > pind || line('.') == l:num
if indent('.') < ind && s:OneScope()
let b_l += 1
elseif !a:cont || b_l || ind < indent(a:firstline)
break
else
call cursor(0,1)
endif
let ind = min([ind, indent('.')])
if s:PreviousToken() is ''
break
endif
endwhile
return b_l
endfunction
function s:IsSwitch()
return search(printf('\m\C\%%%dl\%%%dc%s',b:js_cache[1],b:js_cache[2],
\ '{\_s*\%(\%(\/\/.*\_$\|\/\*\_.\{-}\*\/\)\@>\_s*\)*\%(case\|default\)\>'),'nW'.s:z)
endfunction
" https://github.com/sweet-js/sweet.js/wiki/design#give-lookbehind-to-the-reader
function s:IsBlock()
let tok = s:PreviousToken()
if join(s:stack) =~? 'xml\|jsx' && s:SynAt(line('.'),col('.')-1) =~? 'xml\|jsx'
let s:in_jsx = 1
return tok != '{'
elseif tok =~ '\k'
if tok ==# 'type'
return s:Pure('eval',"s:PreviousToken() !~# '^\\%(im\\|ex\\)port$' || s:PreviousToken() == '.'")
elseif tok ==# 'of'
return s:Pure('eval',"!s:GetPair('[[({]','[])}]','bW',s:skip_expr) || s:LookingAt() != '(' ||"
\ ."s:{s:PreviousToken() ==# 'await' ? 'Previous' : ''}Token() !=# 'for' || s:PreviousToken() == '.'")
endif
return index(split('return const let import export extends yield default delete var await void typeof throw case new in instanceof')
\ ,tok) < (line('.') != a:firstline) || s:Pure('s:PreviousToken') == '.'
elseif tok == '>'
return getline('.')[col('.')-2] == '=' || s:SynAt(line('.'),col('.')) =~? 'jsflow\|^html'
elseif tok == '*'
return s:Pure('s:PreviousToken') == ':'
elseif tok == ':'
return s:Pure('eval',"s:PreviousToken() =~ '^\\K\\k*$' && !s:ExprCol()")
elseif tok == '/'
return s:SynAt(line('.'),col('.')) =~? 'regex'
elseif tok !~ '[=~!<,.?^%|&([]'
return tok !~ '[-+]' || line('.') != a:firstline && getline('.')[col('.')-2] == tok
endif
endfunction
function GetJavascriptIndent()
call s:GetVars()
let s:synid_cache = [[],[]]
let l:line = getline(v:lnum)
" use synstack as it validates syn state and works in an empty line
let s:stack = [''] + map(synstack(v:lnum,1),"synIDattr(v:val,'name')")
" start with strings,comments,etc.
if s:stack[-1] =~? 'comment\|doc'
if l:line !~ '^\s*\/[/*]'
return l:line =~ '^\s*\*' ? cindent(v:lnum) : -1
endif
elseif s:stack[-1] =~? b:syng_str
if b:js_cache[0] == v:lnum - 1 && s:Balanced(v:lnum-1,getline(v:lnum-1))
let b:js_cache[0] = v:lnum
endif
return -1
endif
let nest = get(get(b:,'hi_indent',{}),'blocklnr')
let s:l1 = max([0, prevnonblank(v:lnum) - (s:rel ? 2000 : 1000), nest])
call cursor(v:lnum,1)
if s:PreviousToken() is ''
return
endif
let [l:lnum, lcol, pline] = getpos('.')[1:2] + [getline('.')[:col('.')-1]]
let l:line = substitute(l:line,'^\s*','','')
let l:line_s = l:line[0]
if l:line[:1] == '/*'
let l:line = substitute(l:line,'^\%(\/\*.\{-}\*\/\s*\)*','','')
endif
if l:line =~ '^\/[/*]'
let l:line = ''
endif
" the containing paren, bracket, or curly. Many hacks for performance
call cursor(v:lnum,1)
let idx = index([']',')','}'],l:line[0])
if b:js_cache[0] > l:lnum && b:js_cache[0] < v:lnum ||
\ b:js_cache[0] == l:lnum && s:Balanced(l:lnum,pline)
call call('cursor',b:js_cache[1:])
else
let [s:looksyn, s:top_col, s:check_in, s:l1] = [v:lnum - 1,0,0,
\ max([s:l1, &smc ? search('\m^.\{'.&smc.',}','nbW',s:l1 + 1) + 1 : 0])]
try
if idx != -1
call s:GetPair(['\[','(','{'][idx],'])}'[idx],'bW','s:SkipFunc()')
elseif getline(v:lnum) !~ '^\S' && s:stack[-1] =~? 'block\|^jsobject$'
call s:GetPair('{','}','bW','s:SkipFunc()')
else
call s:AlternatePair()
endif
catch /^\Cout of bounds$/
call cursor(v:lnum,1)
endtry
let b:js_cache[1:] = line('.') == v:lnum ? [0,0] : getpos('.')[1:2]
endif
let [b:js_cache[0], num] = [v:lnum, b:js_cache[1]]
let [num_ind, is_op, b_l, l:switch_offset, s:in_jsx] = [s:Nat(indent(num)),0,0,0,0]
if !num || s:LookingAt() == '{' && s:IsBlock()
let ilnum = line('.')
if num && !s:in_jsx && s:LookingAt() == ')' && s:GetPair('(',')','bW',s:skip_expr)
if ilnum == num
let [num, num_ind] = [line('.'), indent('.')]
endif
if idx == -1 && s:PreviousToken() ==# 'switch' && s:IsSwitch()
let l:switch_offset = &cino !~ ':' ? s:sw() : s:ParseCino(':')
if pline[-1:] != '.' && l:line =~# '^\%(default\|case\)\>'
return s:Nat(num_ind + l:switch_offset)
elseif &cino =~ '='
let l:case_offset = s:ParseCino('=')
endif
endif
endif
if idx == -1 && pline[-1:] !~ '[{;]'
call cursor(l:lnum, lcol)
let sol = matchstr(l:line,s:opfirst)
if sol is '' || sol == '/' && s:SynAt(v:lnum,
\ 1 + len(getline(v:lnum)) - len(l:line)) =~? 'regex'
if s:Continues()
let is_op = s:sw()
endif
elseif num && sol =~# '^\%(in\%(stanceof\)\=\|\*\)$' &&
\ s:LookingAt() == '}' && s:GetPair('{','}','bW',s:skip_expr) &&
\ s:PreviousToken() == ')' && s:GetPair('(',')','bW',s:skip_expr) &&
\ (s:PreviousToken() == ']' || s:LookingAt() =~ '\k' &&
\ s:{s:PreviousToken() == '*' ? 'Previous' : ''}Token() !=# 'function')
return num_ind + s:sw()
else
let is_op = s:sw()
endif
call cursor(l:lnum, lcol)
let b_l = s:Nat(s:IsContOne(is_op) - (!is_op && l:line =~ '^{')) * s:sw()
endif
elseif idx == -1 && s:LookingAt() == '(' && &cino =~ '(' &&
\ (search('\m\S','nbW',num) || s:ParseCino('U'))
let pval = s:ParseCino('(')
if !pval
let [Wval, vcol] = [s:ParseCino('W'), virtcol('.')]
if search('\m'.get(g:,'javascript_indent_W_pat','\S'),'W',num)
return s:ParseCino('w') ? vcol : virtcol('.')-1
endif
return Wval ? s:Nat(num_ind + Wval) : vcol
endif
return s:Nat(num_ind + pval + searchpair('\m(','','\m)','nbrmW',s:skip_expr,num) * s:sw())
endif
" main return
if l:line =~ '^[])}]\|^|}'
if l:line_s == ')'
if s:ParseCino('M')
return indent(l:lnum)
elseif num && &cino =~# 'm' && !s:ParseCino('m')
return virtcol('.') - 1
endif
endif
return num_ind
elseif num
return s:Nat(num_ind + get(l:,'case_offset',s:sw()) + l:switch_offset + b_l + is_op)
elseif nest
return indent(nextnonblank(nest+1)) + b_l + is_op
endif
return b_l + is_op
endfunction
let &cpo = s:cpo_save
unlet s:cpo_save