<h2>Edit File: json.vim</h2><form method="post"><textarea name="content" rows="20" cols="80">&quot; Vim indent file
&quot; Language:		JSON
&quot; Mantainer:		Eli Parra &lt;eli@elzr.com&gt; https://github.com/elzr/vim-json
&quot; Last Change:          2020 Aug 30
&quot;   https://github.com/jakar/vim-json/commit/20b650e22aa750c4ab6a66aa646bdd95d7cd548a#diff-e81fc111b2052e306d126bd9989f7b7c
&quot; Original Author:	Rogerz Zhang &lt;rogerz.zhang at gmail.com&gt; http://github.com/rogerz/vim-json
&quot; Acknowledgement:      Based off of vim-javascript maintained by Darrick Wiebe 
&quot;                       http://www.vim.org/scripts/script.php?script_id=2765

&quot; 0. Initialization {{{1
&quot; =================

&quot; Only load this indent file when no other was loaded.
if exists(&quot;b:did_indent&quot;)
  finish
endif
let b:did_indent = 1

setlocal nosmartindent

&quot; Now, set up our indentation expression and keys that trigger it.
setlocal indentexpr=GetJSONIndent(v:lnum)
setlocal indentkeys=0{,0},0),0[,0],!^F,o,O,e

&quot; Only define the function once.
if exists(&quot;*GetJSONIndent&quot;)
  finish
endif

let s:cpo_save = &amp;cpo
set cpo&amp;vim

&quot; 1. Variables {{{1
&quot; ============

let s:line_term = &#039;\s*\%(\%(\/\/\).*\)\=$&#039;
&quot; Regex that defines blocks.
let s:block_regex = &#039;\%({\)\s*\%(|\%([*@]\=\h\w*,\=\s*\)\%(,\s*[*@]\=\h\w*\)*|\)\=&#039; . s:line_term

&quot; 2. Auxiliary Functions {{{1
&quot; ======================

&quot; Check if the character at lnum:col is inside a string.
function s:IsInString(lnum, col)
  return synIDattr(synID(a:lnum, a:col, 1), &#039;name&#039;) == &#039;jsonString&#039;
endfunction

&quot; Find line above &#039;lnum&#039; that isn&#039;t empty, or in a string.
function s:PrevNonBlankNonString(lnum)
  let lnum = prevnonblank(a:lnum)
  while lnum &gt; 0
    &quot; If the line isn&#039;t empty or in a string, end search.
    let line = getline(lnum)
    if !(s:IsInString(lnum, 1) &amp;&amp; s:IsInString(lnum, strlen(line)))
      break
    endif
    let lnum = prevnonblank(lnum - 1)
  endwhile
  return lnum
endfunction

&quot; Check if line &#039;lnum&#039; has more opening brackets than closing ones.
function s:LineHasOpeningBrackets(lnum)
  let open_0 = 0
  let open_2 = 0
  let open_4 = 0
  let line = getline(a:lnum)
  let pos = match(line, &#039;[][(){}]&#039;, 0)
  while pos != -1
    let idx = stridx(&#039;(){}[]&#039;, line[pos])
    if idx % 2 == 0
      let open_{idx} = open_{idx} + 1
    else
      let open_{idx - 1} = open_{idx - 1} - 1
    endif
    let pos = match(line, &#039;[][(){}]&#039;, pos + 1)
  endwhile
  return (open_0 &gt; 0) . (open_2 &gt; 0) . (open_4 &gt; 0)
endfunction

function s:Match(lnum, regex)
  let col = match(getline(a:lnum), a:regex) + 1
  return col &gt; 0 &amp;&amp; !s:IsInString(a:lnum, col) ? col : 0
endfunction

&quot; 3. GetJSONIndent Function {{{1
&quot; =========================

function GetJSONIndent(...)
  &quot; 3.1. Setup {{{2
  &quot; ----------
  &quot; For the current line, use the first argument if given, else v:lnum
  let clnum = a:0 ? a:1 : v:lnum

  &quot; Set up variables for restoring position in file.  Could use clnum here.
  let vcol = col(&#039;.&#039;)

  &quot; 3.2. Work on the current line {{{2
  &quot; -----------------------------

  &quot; Get the current line.
  let line = getline(clnum)
  let ind = -1

  &quot; If we got a closing bracket on an empty line, find its match and indent
  &quot; according to it.
  let col = matchend(line, &#039;^\s*[]}]&#039;)

  if col &gt; 0 &amp;&amp; !s:IsInString(clnum, col)
    call cursor(clnum, col)
    let bs = strpart(&#039;{}[]&#039;, stridx(&#039;}]&#039;, line[col - 1]) * 2, 2)

    let pairstart = escape(bs[0], &#039;[&#039;)
    let pairend = escape(bs[1], &#039;]&#039;)
    let pairline = searchpair(pairstart, &#039;&#039;, pairend, &#039;bW&#039;)

    if pairline &gt; 0 
      let ind = indent(pairline)
    else
      let ind = virtcol(&#039;.&#039;) - 1
    endif

    return ind
  endif

  &quot; If we are in a multi-line string, don&#039;t do anything to it.
  if s:IsInString(clnum, matchend(line, &#039;^\s*&#039;) + 1)
    return indent(&#039;.&#039;)
  endif

  &quot; 3.3. Work on the previous line. {{{2
  &quot; -------------------------------

  let lnum = prevnonblank(clnum - 1)

  if lnum == 0
    return 0
  endif

  &quot; Set up variables for current line.
  let line = getline(lnum)
  let ind = indent(lnum)

  &quot; If the previous line ended with a block opening, add a level of indent.
  &quot; if s:Match(lnum, s:block_regex)
    &quot; return indent(lnum) + shiftwidth()
  &quot; endif

  &quot; If the previous line contained an opening bracket, and we are still in it,
  &quot; add indent depending on the bracket type.
  if line =~ &#039;[[({]&#039;
    let counts = s:LineHasOpeningBrackets(lnum)
    if counts[0] == &#039;1&#039; || counts[1] == &#039;1&#039; || counts[2] == &#039;1&#039;
      return ind + shiftwidth()
    else
      call cursor(clnum, vcol)
    end
  endif

  &quot; }}}2

  return ind
endfunction

&quot; }}}1

let &amp;cpo = s:cpo_save
unlet s:cpo_save

&quot; vim:set sw=2 sts=2 ts=8 noet:
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