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vim-polyglot/indent/javascript.vim
Adam Stankiewicz 0801eac01a
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2017-03-23 11:28:28 +01:00

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if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'javascript') == -1
" Vim indent file
" Language: Javascript
" Maintainer: Chris Paul ( https://github.com/bounceme )
" URL: https://github.com/pangloss/vim-javascript
" Last Change: March 9, 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
" Get shiftwidth value
if exists('*shiftwidth')
function s:sw()
return shiftwidth()
endfunction
else
function s:sw()
return &l:shiftwidth == 0 ? &l:tabstop : &l:shiftwidth
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' : ''
" searchpair() wrapper
if has('reltime')
function s:GetPair(start,end,flags,skip,time,...)
return searchpair('\m'.a:start,'','\m'.a:end,a:flags,a:skip,max([prevnonblank(v:lnum) - 2000,0] + a:000),a:time)
endfunction
else
function s:GetPair(start,end,flags,skip,...)
return searchpair('\m'.a:start,'','\m'.a:end,a:flags,a:skip,max([prevnonblank(v:lnum) - 1000,get(a:000,1)]))
endfunction
endif
" Regex of syntax group names that are or delimit string or are comments.
let s:syng_strcom = 'string\|comment\|regex\|special\|doc\|template\%(braces\)\@!'
let s:syng_str = 'string\|template\|special'
let s:syng_com = '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."'"
function s:parse_cino(f) abort
return float2nr(eval(substitute(substitute(join(split(
\ matchstr(&cino,'\C.*'.a:f.'\zs[^,]*'), 's',1), '*'.s:W)
\ , '^-\=\zs\*','',''), '^-\=\zs\.','0.','')))
endfunction
function s:skip_func()
if getline('.') =~ '\%<'.col('.').'c\/.\{-}\/\|\%>'.col('.').'c[''"]\|\\$'
return eval(s:skip_expr)
elseif s:checkIn || search('\m`\|\${\|\*\/','nW'.s:z,s:looksyn)
let s:checkIn = eval(s:skip_expr)
endif
let s:looksyn = line('.')
return s:checkIn
endfunction
function s:alternatePair(stop)
let pos = getpos('.')[1:2]
let pat = '[][(){};]'
while search('\m'.pat,'bW',a:stop)
if s:skip_func() | continue | endif
let idx = stridx('])};',s:looking_at())
if idx is 3 | let pat = '[{}()]' | continue | endif
if idx + 1
if s:GetPair(['\[','(','{'][idx], '])}'[idx],'bW','s:skip_func()',2000,a:stop) <= 0
break
endif
else
return
endif
endwhile
call call('cursor',pos)
endfunction
function s:save_pos(f,...)
let l:pos = getpos('.')[1:2]
let ret = call(a:f,a:000)
call call('cursor',l:pos)
return ret
endfunction
function s:syn_at(l,c)
return synIDattr(synID(a:l,a:c,0),'name')
endfunction
function s:looking_at()
return getline('.')[col('.')-1]
endfunction
function s:token()
return s:looking_at() =~ '\k' ? expand('<cword>') : s:looking_at()
endfunction
function s:previous_token()
let l:pos = getpos('.')[1:2]
if search('\m\k\{1,}\|\S','ebW')
if (getline('.')[col('.')-2:col('.')-1] == '*/' || line('.') != l:pos[0] &&
\ getline('.') =~ '\%<'.col('.').'c\/\/') && s:syn_at(line('.'),col('.')) =~? s:syng_com
while search('\m\S\ze\_s*\/[/*]','bW')
if s:syn_at(line('.'),col('.')) !~? s:syng_com
return s:token()
endif
endwhile
else
return s:token()
endif
endif
call call('cursor',l:pos)
return ''
endfunction
function s:expr_col()
if getline('.')[col('.')-2] == ':'
return 1
endif
let bal = 0
while search('\m[{}?:;]','bW')
if eval(s:skip_expr) | continue | endif
" switch (looking_at())
exe { '}': "if s:GetPair('{','}','bW',s:skip_expr,200) <= 0 | return | endif",
\ ';': "return",
\ '{': "return getpos('.')[1:2] != b:js_cache[1:] && !s:IsBlock()",
\ ':': "let bal -= getline('.')[max([col('.')-2,0]):col('.')] !~ '::'",
\ '?': "let bal += 1 | if bal > 0 | return 1 | endif" }[s:looking_at()]
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\)\)') . '$'
function s:continues(ln,con)
if !cursor(a:ln, match(' '.a:con,s:continuation))
let teol = s:looking_at()
if teol == '/'
return s:syn_at(line('.'),col('.')) !~? 'regex'
elseif teol =~ '[-+>]'
return getline('.')[col('.')-2] != tr(teol,'>','=')
elseif teol =~ '\l'
return s:previous_token() != '.'
elseif teol == ':'
return s:expr_col()
endif
return 1
endif
endfunction
" get the line of code stripped of comments and move cursor to the last
" non-comment char.
function s:Trim(ln)
let pline = substitute(getline(a:ln),'\s*$','','')
let l:max = max([strridx(pline,'//'), strridx(pline,'/*')])
while l:max != -1 && s:syn_at(a:ln, strlen(pline)) =~? s:syng_com
let pline = pline[: l:max]
let l:max = max([strridx(pline,'//'), strridx(pline,'/*')])
let pline = substitute(pline[:-2],'\s*$','','')
endwhile
return pline is '' || cursor(a:ln,strlen(pline)) ? pline : pline
endfunction
" Find line above 'lnum' that isn't empty or in a comment
function s:PrevCodeLine(lnum)
let [l:pos, l:n] = [getpos('.')[1:2], prevnonblank(a:lnum)]
while l:n
if getline(l:n) =~ '^\s*\/[/*]'
let l:n = prevnonblank(l:n-1)
elseif stridx(getline(l:n), '*/') + 1 && s:syn_at(l:n,1) =~? s:syng_com
call cursor(l:n,1)
keepjumps norm! [*
let l:n = search('\m\S','nbW')
else
break
endif
endwhile
call call('cursor',l:pos)
return l:n
endfunction
" Check if line 'lnum' has a balanced amount of parentheses.
function s:Balanced(lnum)
let l:open = 0
let l:line = getline(a:lnum)
let pos = match(l:line, '[][(){}]', 0)
while pos != -1
if s:syn_at(a:lnum,pos + 1) !~? s:syng_strcom
let l:open += match(' ' . l:line[pos],'[[({]')
if l:open < 0
return
endif
endif
let pos = match(l:line, (l:open ?
\ '['.escape(tr(l:line[pos],'({[]})',')}][{(').l:line[pos],']').']' :
\ '[][(){}]'), pos + 1)
endwhile
return !l:open
endfunction
function s:OneScope(lnum)
let pline = s:Trim(a:lnum)
let kw = 'else do'
if pline[-1:] == ')' && s:GetPair('(', ')', 'bW', s:skip_expr, 100) > 0
if s:previous_token() =~# '^\%(await\|each\)$'
call s:previous_token()
let kw = 'for'
else
let kw = 'for if let while with'
endif
endif
return pline[-2:] == '=>' || index(split(kw),s:token()) + 1 &&
\ s:save_pos('s:previous_token') != '.'
endfunction
" returns braceless levels started by 'i' and above lines * &sw. 'num' is the
" lineNr which encloses the entire context, 'cont' if whether line 'i' + 1 is
" a continued expression, which could have started in a braceless context
function s:iscontOne(i,num,cont)
let [l:i, l:num, bL] = [a:i, a:num + !a:num, 0]
let pind = a:num ? indent(l:num) + s:W : 0
let ind = indent(l:i) + (a:cont ? 0 : s:W)
while l:i >= l:num && (ind > pind || l:i == l:num)
if indent(l:i) < ind && s:OneScope(l:i)
let bL += s:W
let l:i = line('.')
elseif !a:cont || bL || ind < indent(a:i)
break
endif
let ind = min([ind, indent(l:i)])
let l:i = s:PrevCodeLine(l:i - 1)
endwhile
return bL
endfunction
" https://github.com/sweet-js/sweet.js/wiki/design#give-lookbehind-to-the-reader
function s:IsBlock()
if s:looking_at() == '{'
let l:n = line('.')
let char = s:previous_token()
if match(s:stack,'\cxml\|jsx') + 1 && s:syn_at(line('.'),col('.')-1) =~? 'xml\|jsx'
return char != '{'
elseif char =~ '\k'
if char ==# 'type'
return s:previous_token() !~# '^\%(im\|ex\)port$'
endif
return index(split('return const let import export extends yield default delete var await void typeof throw case new of in instanceof')
\ ,char) < (line('.') != l:n) || s:save_pos('s:previous_token') == '.'
elseif char == '>'
return getline('.')[col('.')-2] == '=' || s:syn_at(line('.'),col('.')) =~? '^jsflow'
elseif char == ':'
return !s:save_pos('s:expr_col')
elseif char == '/'
return s:syn_at(line('.'),col('.')) =~? 'regex'
endif
return char !~ '[=~!<*,?^%|&([]' &&
\ (char !~ '[-+]' || l:n != line('.') && getline('.')[col('.')-2] == char)
endif
endfunction
function GetJavascriptIndent()
let b:js_cache = get(b:,'js_cache',[0,0,0])
" Get the current line.
call cursor(v:lnum,1)
let l:line = getline('.')
" 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')")
let syns = get(s:stack,-1,'')
" start with strings,comments,etc.
if syns =~? s:syng_com
if l:line =~ '^\s*\*'
return cindent(v:lnum)
elseif l:line !~ '^\s*\/[/*]'
return -1
endif
elseif syns =~? s:syng_str
if b:js_cache[0] == v:lnum - 1 && s:Balanced(v:lnum-1)
let b:js_cache[0] = v:lnum
endif
return -1
endif
let l:lnum = s:PrevCodeLine(v:lnum - 1)
if !l:lnum
return
endif
let l:line = substitute(l:line,'^\s*','','')
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
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))
call call('cursor',b:js_cache[1:])
else
let [s:looksyn, s:checkIn, top] = [v:lnum - 1, 0, (!indent(l:lnum) &&
\ s:syn_at(l:lnum,1) !~? s:syng_str) * l:lnum]
if idx + 1
call s:GetPair(['\[','(','{'][idx],'])}'[idx],'bW','s:skip_func()',2000,top)
elseif getline(v:lnum) !~ '^\S' && syns =~? 'block'
call s:GetPair('{','}','bW','s:skip_func()',2000,top)
else
call s:alternatePair(top)
endif
endif
let b:js_cache = [v:lnum] + (line('.') == v:lnum ? [0,0] : getpos('.')[1:2])
let num = b:js_cache[1]
let [s:W, isOp, bL, switch_offset] = [s:sw(),0,0,0]
if !num || s:IsBlock()
let ilnum = line('.')
let pline = s:save_pos('s:Trim',l:lnum)
if num && s:looking_at() == ')' && s:GetPair('(', ')', 'bW', s:skip_expr, 100) > 0
let num = ilnum == num ? line('.') : num
if idx < 0 && s:previous_token() ==# 'switch' && s:previous_token() != '.'
if &cino !~ ':'
let switch_offset = s:W
else
let switch_offset = max([-indent(num),s:parse_cino(':')])
endif
if pline[-1:] != '.' && l:line =~# '^\%(default\|case\)\>'
return indent(num) + switch_offset
endif
endif
endif
if idx < 0 && pline[-1:] !~ '[{;]'
let isOp = (l:line =~# s:opfirst || s:continues(l:lnum,pline)) * s:W
let bL = s:iscontOne(l:lnum,b:js_cache[1],isOp)
let bL -= (bL && l:line[0] == '{') * s:W
endif
elseif idx < 0 && getline(b:js_cache[1])[b:js_cache[2]-1] == '(' && &cino =~ '('
let pval = s:parse_cino('(')
return !pval ? (s:parse_cino('w') ? 0 : -(!!search('\m\S','W'.s:z,num))) + virtcol('.') :
\ max([indent('.') + pval + (s:GetPair('(',')','nbrmW',s:skip_expr,100,num) * s:W),0])
endif
" main return
if l:line =~ '^\%([])}]\||}\)'
return max([indent(num),0])
elseif num
return indent(num) + s:W + switch_offset + bL + isOp
endif
return bL + isOp
endfunction
let &cpo = s:cpo_save
unlet s:cpo_save
endif
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