<h2>Edit File: typescript.vim</h2><form method="post"><textarea name="content" rows="20" cols="80">&quot; Vim indent file
&quot; Language: TypeScript
&quot; Maintainer: See https://github.com/HerringtonDarkholme/yats.vim
&quot; Last Change: 2019 Oct 18
&quot; Acknowledgement: Based off of vim-ruby maintained by Nikolai Weibull http://vim-ruby.rubyforge.org

&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=GetTypescriptIndent()
setlocal formatexpr=Fixedgq(v:lnum,v:count)
setlocal indentkeys=0{,0},0),0],0\,,!^F,o,O,e

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

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

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

let s:js_keywords = &#039;^\s*\(break\|case\|catch\|continue\|debugger\|default\|delete\|do\|else\|finally\|for\|function\|if\|in\|instanceof\|new\|return\|switch\|this\|throw\|try\|typeof\|var\|void\|while\|with\)&#039;

&quot; Regex of syntax group names that are or delimit string or are comments.
let s:syng_strcom = &#039;string\|regex\|comment\c&#039;

&quot; Regex of syntax group names that are strings.
let s:syng_string = &#039;regex\c&#039;

&quot; Regex of syntax group names that are strings or documentation.
let s:syng_multiline = &#039;comment\c&#039;

&quot; Regex of syntax group names that are line comment.
let s:syng_linecom = &#039;linecomment\c&#039;

&quot; Expression used to check whether we should skip a match with searchpair().
let s:skip_expr = &quot;synIDattr(synID(line(&#039;.&#039;),col(&#039;.&#039;),1),&#039;name&#039;) =~ &#039;&quot;.s:syng_strcom.&quot;&#039;&quot;

let s:line_term = &#039;\s*\%(\%(\/\/\).*\)\=$&#039;

&quot; Regex that defines continuation lines, not including (, {, or [.
let s:continuation_regex = &#039;\%([\\*+/.:]\|\%(&lt;%\)\@&lt;![=-]\|\W[|&amp;?]\|||\|&amp;&amp;\|[^=]=[^=].*,\)&#039; . s:line_term

&quot; Regex that defines continuation lines.
&quot; TODO: this needs to deal with if ...: and so on
let s:msl_regex = s:continuation_regex

let s:one_line_scope_regex = &#039;\&lt;\%(if\|else\|for\|while\)\&gt;[^{;]*&#039; . s:line_term

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

let s:var_stmt = &#039;^\s*var&#039;

let s:comma_first = &#039;^\s*,&#039;
let s:comma_last = &#039;,\s*$&#039;

let s:ternary = &#039;^\s\+[?|:]&#039;
let s:ternary_q = &#039;^\s\+?&#039;

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

&quot; Check if the character at lnum:col is inside a string, comment, or is ascii.
function s:IsInStringOrComment(lnum, col)
  return synIDattr(synID(a:lnum, a:col, 1), &#039;name&#039;) =~ s:syng_strcom
endfunction

&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;) =~ s:syng_string
endfunction

&quot; Check if the character at lnum:col is inside a multi-line comment.
function s:IsInMultilineComment(lnum, col)
  return !s:IsLineComment(a:lnum, a:col) &amp;&amp; synIDattr(synID(a:lnum, a:col, 1), &#039;name&#039;) =~ s:syng_multiline
endfunction

&quot; Check if the character at lnum:col is a line comment.
function s:IsLineComment(lnum, col)
  return synIDattr(synID(a:lnum, a:col, 1), &#039;name&#039;) =~ s:syng_linecom
endfunction

&quot; Find line above &#039;lnum&#039; that isn&#039;t empty, in a comment, or in a string.
function s:PrevNonBlankNonString(lnum)
  let in_block = 0
  let lnum = prevnonblank(a:lnum)
  while lnum &gt; 0
    &quot; Go in and out of blocks comments as necessary.
    &quot; If the line isn&#039;t empty (with opt. comment) or in a string, end search.
    let line = getline(lnum)
    if line =~ &#039;/\*&#039;
      if in_block
        let in_block = 0
      else
        break
      endif
    elseif !in_block &amp;&amp; line =~ &#039;\*/&#039;
      let in_block = 1
    elseif !in_block &amp;&amp; line !~ &#039;^\s*\%(//\).*$&#039; &amp;&amp; !(s:IsInStringOrComment(lnum, 1) &amp;&amp; s:IsInStringOrComment(lnum, strlen(line)))
      break
    endif
    let lnum = prevnonblank(lnum - 1)
  endwhile
  return lnum
endfunction

&quot; Find line above &#039;lnum&#039; that started the continuation &#039;lnum&#039; may be part of.
function s:GetMSL(lnum, in_one_line_scope)
  &quot; Start on the line we&#039;re at and use its indent.
  let msl = a:lnum
  let lnum = s:PrevNonBlankNonString(a:lnum - 1)
  while lnum &gt; 0
    &quot; If we have a continuation line, or we&#039;re in a string, use line as MSL.
    &quot; Otherwise, terminate search as we have found our MSL already.
    let line = getline(lnum)
    let col = match(line, s:msl_regex) + 1
    if (col &gt; 0 &amp;&amp; !s:IsInStringOrComment(lnum, col)) || s:IsInString(lnum, strlen(line))
      let msl = lnum
    else
      &quot; Don&#039;t use lines that are part of a one line scope as msl unless the
      &quot; flag in_one_line_scope is set to 1
      &quot;
      if a:in_one_line_scope
        break
      end
      let msl_one_line = s:Match(lnum, s:one_line_scope_regex)
      if msl_one_line == 0
        break
      endif
    endif
    let lnum = s:PrevNonBlankNonString(lnum - 1)
  endwhile
  return msl
endfunction

function s:RemoveTrailingComments(content)
  let single = &#039;\/\/\(.*\)\s*$&#039;
  let multi = &#039;\/\*\(.*\)\*\/\s*$&#039;
  return substitute(substitute(a:content, single, &#039;&#039;, &#039;&#039;), multi, &#039;&#039;, &#039;&#039;)
endfunction

&quot; Find if the string is inside var statement (but not the first string)
function s:InMultiVarStatement(lnum)
  let lnum = s:PrevNonBlankNonString(a:lnum - 1)

&quot;  let type = synIDattr(synID(lnum, indent(lnum) + 1, 0), &#039;name&#039;)

  &quot; loop through previous expressions to find a var statement
  while lnum &gt; 0
    let line = getline(lnum)

    &quot; if the line is a js keyword
    if (line =~ s:js_keywords)
      &quot; check if the line is a var stmt
      &quot; if the line has a comma first or comma last then we can assume that we
      &quot; are in a multiple var statement
      if (line =~ s:var_stmt)
        return lnum
      endif

      &quot; other js keywords, not a var
      return 0
    endif

    let lnum = s:PrevNonBlankNonString(lnum - 1)
  endwhile

  &quot; beginning of program, not a var
  return 0
endfunction

&quot; Find line above with beginning of the var statement or returns 0 if it&#039;s not
&quot; this statement
function s:GetVarIndent(lnum)
  let lvar = s:InMultiVarStatement(a:lnum)
  let prev_lnum = s:PrevNonBlankNonString(a:lnum - 1)

  if lvar
    let line = s:RemoveTrailingComments(getline(prev_lnum))

    &quot; if the previous line doesn&#039;t end in a comma, return to regular indent
    if (line !~ s:comma_last)
      return indent(prev_lnum) - shiftwidth()
    else
      return indent(lvar) + shiftwidth()
    endif
  endif

  return -1
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
    if !s:IsInStringOrComment(a:lnum, 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
    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:IsInStringOrComment(a:lnum, col) ? col : 0
endfunction

function s:IndentWithContinuation(lnum, ind, width)
  &quot; Set up variables to use and search for MSL to the previous line.
  let p_lnum = a:lnum
  let lnum = s:GetMSL(a:lnum, 1)
  let line = getline(lnum)

  &quot; If the previous line wasn&#039;t a MSL and is continuation return its indent.
  &quot; TODO: the || s:IsInString() thing worries me a bit.
  if p_lnum != lnum
    if s:Match(p_lnum,s:continuation_regex)||s:IsInString(p_lnum,strlen(line))
      return a:ind
    endif
  endif

  &quot; Set up more variables now that we know we aren&#039;t continuation bound.
  let msl_ind = indent(lnum)

  &quot; If the previous line ended with [*+/.-=], start a continuation that
  &quot; indents an extra level.
  if s:Match(lnum, s:continuation_regex)
    if lnum == p_lnum
      return msl_ind + a:width
    else
      return msl_ind
    endif
  endif

  return a:ind
endfunction

function s:InOneLineScope(lnum)
  let msl = s:GetMSL(a:lnum, 1)
  if msl &gt; 0 &amp;&amp; s:Match(msl, s:one_line_scope_regex)
    return msl
  endif
  return 0
endfunction

function s:ExitingOneLineScope(lnum)
  let msl = s:GetMSL(a:lnum, 1)
  if msl &gt; 0
    &quot; if the current line is in a one line scope ..
    if s:Match(msl, s:one_line_scope_regex)
      return 0
    else
      let prev_msl = s:GetMSL(msl - 1, 1)
      if s:Match(prev_msl, s:one_line_scope_regex)
        return prev_msl
      endif
    endif
  endif
  return 0
endfunction

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

function GetTypescriptIndent()
  &quot; 3.1. Setup {{{2
  &quot; ----------

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

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

  let ind = -1
  &quot; Get the current line.
  let line = getline(v:lnum)
  &quot; previous nonblank line number
  let prevline = prevnonblank(v:lnum - 1)

  &quot; If we got a closing bracket on an empty line, find its match and indent
  &quot; according to it.  For parentheses we indent to its column - 1, for the
  &quot; others we indent to the containing line&#039;s MSL&#039;s level.  Return -1 if fail.
  let col = matchend(line, &#039;^\s*[],})]&#039;)
  if col &gt; 0 &amp;&amp; !s:IsInStringOrComment(v:lnum, col)
    call cursor(v:lnum, col)

    let lvar = s:InMultiVarStatement(v:lnum)
    if lvar
      let prevline_contents = s:RemoveTrailingComments(getline(prevline))

      &quot; check for comma first
      if (line[col - 1] =~ &#039;,&#039;)
        &quot; if the previous line ends in comma or semicolon don&#039;t indent
        if (prevline_contents =~ &#039;[;,]\s*$&#039;)
          return indent(s:GetMSL(line(&#039;.&#039;), 0))
        &quot; get previous line indent, if it&#039;s comma first return prevline indent
        elseif (prevline_contents =~ s:comma_first)
          return indent(prevline)
        &quot; otherwise we indent 1 level
        else
          return indent(lvar) + shiftwidth()
        endif
      endif
    endif


    let bs = strpart(&#039;(){}[]&#039;, stridx(&#039;)}]&#039;, line[col - 1]) * 2, 2)
    if searchpair(escape(bs[0], &#039;\[&#039;), &#039;&#039;, bs[1], &#039;bW&#039;, s:skip_expr) &gt; 0
      if line[col-1]==&#039;)&#039; &amp;&amp; col(&#039;.&#039;) != col(&#039;$&#039;) - 1
        let ind = virtcol(&#039;.&#039;)-1
      else
        let ind = indent(s:GetMSL(line(&#039;.&#039;), 0))
      endif
    endif
    return ind
  endif

  &quot; If the line is comma first, dedent 1 level
  if (getline(prevline) =~ s:comma_first)
    return indent(prevline) - shiftwidth()
  endif

  if (line =~ s:ternary)
    if (getline(prevline) =~ s:ternary_q)
      return indent(prevline)
    else
      return indent(prevline) + shiftwidth()
    endif
  endif

  &quot; If we are in a multi-line comment, cindent does the right thing.
  if s:IsInMultilineComment(v:lnum, 1) &amp;&amp; !s:IsLineComment(v:lnum, 1)
    return cindent(v:lnum)
  endif

  &quot; Check for multiple var assignments
&quot;  let var_indent = s:GetVarIndent(v:lnum)
&quot;  if var_indent &gt;= 0
&quot;    return var_indent
&quot;  endif

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

  &quot; If the line is empty and the previous nonblank line was a multi-line
  &quot; comment, use that comment&#039;s indent. Deduct one char to account for the
  &quot; space in &#039; */&#039;.
  if line =~ &#039;^\s*$&#039; &amp;&amp; s:IsInMultilineComment(prevline, 1)
    return indent(prevline) - 1
  endif

  &quot; Find a non-blank, non-multi-line string line above the current line.
  let lnum = s:PrevNonBlankNonString(v:lnum - 1)

  &quot; If the line is empty and inside a string, use the previous line.
  if line =~ &#039;^\s*$&#039; &amp;&amp; lnum != prevline
    return indent(prevnonblank(v:lnum))
  endif

  &quot; At the start of the file use zero indent.
  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.
  if s:Match(lnum, s:block_regex)
    return indent(s:GetMSL(lnum, 0)) + shiftwidth()
  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; &amp;&amp; searchpair(&#039;(&#039;, &#039;&#039;, &#039;)&#039;, &#039;bW&#039;, s:skip_expr) &gt; 0
      if col(&#039;.&#039;) + 1 == col(&#039;$&#039;)
        return ind + shiftwidth()
      else
        return virtcol(&#039;.&#039;)
      endif
    elseif counts[1] == &#039;1&#039; || counts[2] == &#039;1&#039;
      return ind + shiftwidth()
    else
      call cursor(v:lnum, vcol)
    end
  endif

  &quot; 3.4. Work on the MSL line. {{{2
  &quot; --------------------------

  let ind_con = ind
  let ind = s:IndentWithContinuation(lnum, ind_con, shiftwidth())

  &quot; }}}2
  &quot;
  &quot;
  let ols = s:InOneLineScope(lnum)
  if ols &gt; 0
    let ind = ind + shiftwidth()
  else
    let ols = s:ExitingOneLineScope(lnum)
    while ols &gt; 0 &amp;&amp; ind &gt; 0
      let ind = ind - shiftwidth()
      let ols = s:InOneLineScope(ols - 1)
    endwhile
  endif

  return ind
endfunction

&quot; }}}1

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

function! Fixedgq(lnum, count)
    let l:tw = &amp;tw ? &amp;tw : 80

    let l:count = a:count
    let l:first_char = indent(a:lnum) + 1

    if mode() == &#039;i&#039; &quot; gq was not pressed, but tw was set
        return 1
    endif

    &quot; This gq is only meant to do code with strings, not comments
    if s:IsLineComment(a:lnum, l:first_char) || s:IsInMultilineComment(a:lnum, l:first_char)
        return 1
    endif

    if len(getline(a:lnum)) &lt; l:tw &amp;&amp; l:count == 1 &quot; No need for gq
        return 1
    endif

    &quot; Put all the lines on one line and do normal spliting after that
    if l:count &gt; 1
        while l:count &gt; 1
            let l:count -= 1
            normal J
        endwhile
    endif

    let l:winview = winsaveview()

    call cursor(a:lnum, l:tw + 1)
    let orig_breakpoint = searchpairpos(&#039; &#039;, &#039;&#039;, &#039;\.&#039;, &#039;bcW&#039;, &#039;&#039;, a:lnum)
    call cursor(a:lnum, l:tw + 1)
    let breakpoint = searchpairpos(&#039; &#039;, &#039;&#039;, &#039;\.&#039;, &#039;bcW&#039;, s:skip_expr, a:lnum)

    &quot; No need for special treatment, normal gq handles edgecases better
    if breakpoint[1] == orig_breakpoint[1]
        call winrestview(l:winview)
        return 1
    endif

    &quot; Try breaking after string
    if breakpoint[1] &lt;= indent(a:lnum)
        call cursor(a:lnum, l:tw + 1)
        let breakpoint = searchpairpos(&#039;\.&#039;, &#039;&#039;, &#039; &#039;, &#039;cW&#039;, s:skip_expr, a:lnum)
    endif


    if breakpoint[1] != 0
        call feedkeys(&quot;r\&lt;CR&gt;&quot;)
    else
        let l:count = l:count - 1
    endif

    &quot; run gq on new lines
    if l:count == 1
        call feedkeys(&quot;gqq&quot;)
    endif

    return 0
endfunction
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