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README.md

@@ -100,8 +100,6 @@ variables:
 ## Indentation Specific
 
 * `:h cino-:`
-* End-of-line continuations : `g:javascript_continuation` ( slightly complicated, look at the source code )
-* Start-of-line continuations : `g:javascript_opfirst` ( same as above )
 
 ## Contributing
 

indent/javascript.vim

@@ -2,7 +2,7 @@
 " Language: Javascript
 " Maintainer: vim-javascript community
 " URL: https://github.com/pangloss/vim-javascript
-" Last Change: August 20, 2016
+" Last Change: September 4, 2016
 
 " Only load this indent file when no other was loaded.
 if exists('b:did_indent')
@@ -38,7 +38,7 @@ else
 endif
 
 let s:line_pre = '^\s*\%(\%(\%(\/\*.\{-}\)\=\*\+\/\s*\)\=\)\@>'
-let s:expr_case = s:line_pre . '\%(\%(case\>.\+\)\|default\)\s*:'
+let s:expr_case = s:line_pre . '\%(\%(case\>.\+\)\|default\)\s*:\C'
 " Regex of syntax group names that are or delimit string or are comments.
 let s:syng_strcom = '\%(s\%(tring\|pecial\)\|comment\|regex\|doc\|template\)'
 
@@ -47,13 +47,20 @@ 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."'"
+function s:skip_func(lnum)
+  if !s:free || getline(line('.')) =~ '[''/"\\]' || search('`','nW',a:lnum) || search('\*\/','nW',a:lnum)
+    let s:free = !eval(s:skip_expr)
+  endif
+  let s:looksyn = s:free ? line('.') : s:looksyn
+  return !s:free
+endfunction
 
 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)
+  function s:GetPair(start,end,flags,skip,time)
+    return searchpair(a:start,'',a:end,a:flags,a:skip,max([prevnonblank(v:lnum) - 2000,0]),a:time)
   endfunction
 else
-  function s:GetPair(start,end,flags,n)
+  function s:GetPair(start,end,flags,...)
     return searchpair(a:start,'',a:end,a:flags,0,max([prevnonblank(v:lnum) - 2000,0]))
   endfunction
 endif
@@ -62,29 +69,28 @@ 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\)\=\>\)'
+  let g:javascript_opfirst = '\%([<>,?^%|*&]\|\/[^/*]\|\([-.:+]\)\1\@!\|=>\@!\|in\%(stanceof\)\=\>\)'
 endif
 if !exists('g:javascript_continuation')
-  let g:javascript_continuation = '\%([<=,.?/*:^%|&]\|+\@<!+\|-\@<!-\|=\@<!>\|\<in\%(stanceof\)\=\)'
+  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)
+function s:OneScope(lnum,text)
   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>') : ''
+        \ cursor(a:lnum, match(' ' . a:text, ')' . s:line_term)) > -1 &&
+        \ s:GetPair('(', ')', 'bW', s:skip_expr, 100) > 0 && search('\C\l\+\_s*\%#','bW') &&
+        \ (expand('<cword>') !=# 'while' || s:GetPair('\C\<do\>', '\C\<while\>','nbW',s:skip_expr,100) <= 0) &&
+        \ (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\|yield\|delete\|void\|t\%(ypeof\|hrow\)\|new\|\<in\%(stanceof\)\=\)\)\_s*\)\%#','bnW') &&
-        \ (!search(':\_s*\%#','bW') || (!s:GetPair('[({[]','[])}]','bW',200) || s:IsBlock()))
+        \ '\C\%(\<return\s*\|\%([-=~!<*+,.?^%|&\[(]\|=\@<!>\|\*\@<!\/\|\<\%(var\|const\|let\|import\|export\%(\_s\+default\)\=\|yield\|delete\|void\|t\%(ypeof\|hrow\)\|new\|in\%(stanceof\)\=\)\)\_s*\)\%#','bnW') &&
+        \ (search(s:expr_case . '\_s*\%#','nbW') || !search('[{:]\_s*\%#','bW') || s:IsBlock())
 endfunction
 
 " Auxiliary Functions {{{2
@@ -109,9 +115,12 @@ function s:Balanced(lnum)
     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
+        let open_{idx} += 1
       else
-        let open_{idx - 1} = open_{idx - 1} - 1
+        let open_{idx - 1} -= 1
+        if open_{idx - 1} < 0
+          return 0
+        endif
       endif
     endif
     let pos = match(l:line, '[][(){}]', pos + 1)
@@ -129,7 +138,7 @@ function GetJavascriptIndent()
   let syns = synIDattr(synID(v:lnum, 1, 0), 'name')
 
   " start with strings,comments,etc.{{{2
-  if (l:line !~ '^[''"`]' && syns =~? '\%(string\|template\)') ||
+  if (l:line !~ '^[''"]' && syns =~? '\%(string\|template\)') ||
         \ (l:line !~ '^\s*[/*]' && syns =~? s:syng_comment)
     return -1
   endif
@@ -152,36 +161,37 @@ function GetJavascriptIndent()
 
   " the containing paren, bracket, curly. Memoize, last lineNr either has the
   " same scope or starts a new one, unless if it closed a scope.
+  let [s:looksyn,s:free] = [v:lnum - 1,1]
   call cursor(v:lnum,1)
-  if b:js_cache[0] >= l:lnum  && b:js_cache[0] < v:lnum && b:js_cache[0] &&
+  if b:js_cache[0] < v:lnum && b:js_cache[0] >= l:lnum &&
         \ (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)
+    let num = s:GetPair(pattern[0],pattern[1],'bW','s:skip_func(s:looksyn)',2000)
   else
-    let num = s:GetPair('[({[]','[])}]','bW',2000)
+    let num = s:GetPair('[({[]','[])}]','bW','s:skip_func(s:looksyn)',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
 
+  let pline = substitute(substitute(getline(l:lnum),s:expr_case,'\=repeat(" ",strlen(submatch(0)))',''), '\%(:\@<!\/\/.*\)$', '','')
   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() :
+  let switch_offset = num <= 0 || !(search(')\_s*\%#','bW') &&
+        \ s:GetPair('(', ')', 'bW', s:skip_expr, 100) > 0 && search('\C\<switch\_s*\%#','bW')) ? 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 . '{')
+  let isOp = l:line =~# g:javascript_opfirst || pline =~# g:javascript_continuation
+  if isOp && (num <= 0 || cursor(b:js_cache[1],b:js_cache[2]) || s:IsBlock()) ||
+        \ s:OneScope(l:lnum,pline) =~# '\<\%(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