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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 [divider, n, cstr] = [0] + matchlist(&cino, \ '\%(.*,\)\=\%(\%d'.char2nr(a:f).'\(-\)\=\([.s0-9]*\)\)\=')[1:2] for c in split(cstr,'\zs') if c == '.' && !divider let divider = 1 elseif c ==# 's' if n !~ '\d' return n . s:sw() + 0 endif let n = str2nr(n) * s:sw() break else let [n, divider] .= [c, 0] endif endfor return str2nr(n) / max([str2nr(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() == ':' if getline('.')[col('.')-2] == ':' call cursor(0,col('.')-1) continue endif let bal -= 1 elseif s:LookingAt() == '?' if getline('.')[col('.'):col('.')+1] =~ '^\.\d\@!' continue elseif !bal return 1 endif let bal += 1 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\)\)') . '$' function s:Continues() let tok = matchstr(strpart(getline('.'),col('.')-15,15),s:continuation) if tok =~ '[a-z:]' return tok == ':' ? s:ExprCol() : s:PreviousToken() != '.' elseif tok !~ '[/>]' return tok isnot '' endif return s:SynAt(line('.'),col('.')) !~? (tok == '>' ? 'jsflow\|^html' : 'regex') endfunction " Check if line 'lnum' has a balanced amount of parentheses. function s:Balanced(lnum,line) let l:open = 0 let pos = match(a:line, '[][(){}]') while pos != -1 if s:SynAt(a:lnum,pos + 1) !~? b:syng_strcom let l:open += match(' ' . a:line[pos],'[[({]') if l:open < 0 return endif endif let pos = match(a:line, !l:open ? '[][(){}]' : '()' =~ a:line[pos] ? \ '[()]' : '{}' =~ a:line[pos] ? '[{}]' : '[][]', pos + 1) endwhile return !l:open endfunction function s:OneScope() if s:LookingAt() == ')' && s:GetPair('(', ')', 'bW', s:skip_expr) let tok = s:PreviousToken() return (count(split('for if let while with'),tok) || \ tok =~# '^await$\|^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) if s:PreviousToken() == ')' return s:GetPair('(', ')', 'bW', s:skip_expr) endif return 1 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, b_l] = [b:js_cache[1] + !b:js_cache[1], 0] let pind = b:js_cache[1] ? indent(b:js_cache[1]) + s:sw() : 0 let ind = indent('.') + !a:cont 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() call call('cursor',b:js_cache[1:]) return search('\m\C\%#.\_s*\%(\%(\/\/.*\_$\|\/\*\_.\{-}\*\/\)\@>\_s*\)*\%(case\|default\)\>','nWc'.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 cindent(v:lnum) elseif l:line !~ '^\s*\/[/*]' return -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 s:l1 = max([0,prevnonblank(v:lnum) - (s:rel ? 2000 : 1000), \ get(get(b:,'hi_indent',{}),'blocklnr')]) call cursor(v:lnum,1) if s:PreviousToken() is '' return endif let [l:lnum, pline] = [line('.'), getline('.')[:col('.')-1]] let l:line = substitute(l:line,'^\s*','','') let l:line_raw = l:line 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, len(pline)) 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, len(pline)) let b_l = s:Nat(s:IsContOne(is_op) - (!is_op && l:line =~ '^{')) * s:sw() endif elseif idx.s:LookingAt().&cino =~ '^-1(.*(' && (search('\m\S','nbW',num) || s:ParseCino('U')) let pval = s:ParseCino('(') if !pval let [Wval, vcol] = [s:ParseCino('W'), virtcol('.')] if search('\m\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_raw[0] == ')' 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) endif return b_l + is_op endfunction let &cpo = s:cpo_save unlet s:cpo_save