FM / indent

/usr/share/vim/vim82/indent

Name	Size	Mode	Actions
aap.vim	265	0644	edit dl rm
ada.vim	11234	0644	edit dl rm
ant.vim	290	0644	edit dl rm
automake.vim	243	0644	edit dl rm
awk.vim	7774	0644	edit dl rm
bash.vim	350	0644	edit dl rm
bib.vim	346	0644	edit dl rm
bst.vim	1937	0644	edit dl rm
bzl.vim	2925	0644	edit dl rm
c.vim	325	0644	edit dl rm
cdl.vim	4342	0644	edit dl rm
ch.vim	470	0644	edit dl rm
chaiscript.vim	1138	0644	edit dl rm
changelog.vim	264	0644	edit dl rm
clojure.vim	11557	0644	edit dl rm
cmake.vim	2683	0644	edit dl rm
cobol.vim	8832	0644	edit dl rm
config.vim	2222	0644	edit dl rm
context.vim	752	0644	edit dl rm
cpp.vim	329	0644	edit dl rm
cs.vim	1756	0644	edit dl rm
css.vim	1813	0644	edit dl rm
cucumber.vim	2678	0644	edit dl rm
cuda.vim	305	0644	edit dl rm
d.vim	572	0644	edit dl rm
dictconf.vim	337	0644	edit dl rm
dictdconf.vim	338	0644	edit dl rm
docbk.vim	336	0644	edit dl rm
dosbatch.vim	1382	0644	edit dl rm
dtd.vim	11954	0644	edit dl rm
dtrace.vim	451	0644	edit dl rm
dune.vim	332	0644	edit dl rm
dylan.vim	2770	0644	edit dl rm
eiffel.vim	3317	0644	edit dl rm
elm.vim	3277	0644	edit dl rm
erlang.vim	50066	0644	edit dl rm
eruby.vim	3016	0644	edit dl rm
eterm.vim	743	0644	edit dl rm
falcon.vim	14077	0644	edit dl rm
fortran.vim	7664	0644	edit dl rm
framescript.vim	891	0644	edit dl rm
gitconfig.vim	841	0644	edit dl rm
gitolite.vim	1277	0644	edit dl rm
go.vim	1673	0644	edit dl rm
haml.vim	2203	0644	edit dl rm
hamster.vim	1692	0644	edit dl rm
hog.vim	1892	0644	edit dl rm
html.vim	33651	0644	edit dl rm
htmldjango.vim	273	0644	edit dl rm
idlang.vim	1683	0644	edit dl rm
ishd.vim	1877	0644	edit dl rm
j.vim	1812	0644	edit dl rm
java.vim	4287	0644	edit dl rm
javascript.vim	15362	0644	edit dl rm
javascriptreact.vim	109	0644	edit dl rm
json.vim	4528	0644	edit dl rm
jsonc.vim	4727	0644	edit dl rm
jsp.vim	462	0644	edit dl rm
julia.vim	15449	0644	edit dl rm
ld.vim	1867	0644	edit dl rm
less.vim	243	0644	edit dl rm
lifelines.vim	638	0644	edit dl rm
liquid.vim	1899	0644	edit dl rm
lisp.vim	353	0644	edit dl rm
logtalk.vim	1859	0644	edit dl rm
lua.vim	1927	0644	edit dl rm
mail.vim	355	0644	edit dl rm
make.vim	3565	0644	edit dl rm
matlab.vim	4923	0644	edit dl rm
meson.vim	5319	0644	edit dl rm
mf.vim	156	0644	edit dl rm
mma.vim	2273	0644	edit dl rm
mp.vim	11321	0644	edit dl rm
nginx.vim	362	0644	edit dl rm
nsis.vim	3305	0644	edit dl rm
objc.vim	1646	0644	edit dl rm
ocaml.vim	9191	0644	edit dl rm
occam.vim	4700	0644	edit dl rm
pascal.vim	5793	0644	edit dl rm
perl.vim	5905	0644	edit dl rm
php.vim	25901	0644	edit dl rm
postscr.vim	1708	0644	edit dl rm
pov.vim	2662	0644	edit dl rm
prolog.vim	1864	0644	edit dl rm
ps1.vim	410	0644	edit dl rm
pyrex.vim	326	0644	edit dl rm
python.vim	6984	0644	edit dl rm
r.vim	14037	0644	edit dl rm
raku.vim	3416	0644	edit dl rm
raml.vim	285	0644	edit dl rm
readline.vim	786	0644	edit dl rm
rhelp.vim	2840	0644	edit dl rm
rmd.vim	2187	0644	edit dl rm
rnoweb.vim	1087	0644	edit dl rm
rpl.vim	1863	0644	edit dl rm
rrst.vim	1195	0644	edit dl rm
rst.vim	1820	0644	edit dl rm
ruby.vim	30148	0644	edit dl rm
rust.vim	6498	0644	edit dl rm
sas.vim	5270	0644	edit dl rm
sass.vim	950	0644	edit dl rm
scala.vim	19656	0644	edit dl rm
scheme.vim	372	0644	edit dl rm
scss.vim	191	0644	edit dl rm
sdl.vim	2829	0644	edit dl rm
sh.vim	9257	0644	edit dl rm
sml.vim	6478	0644	edit dl rm
sql.vim	1204	0644	edit dl rm
sqlanywhere.vim	13269	0644	edit dl rm
sshconfig.vim	796	0644	edit dl rm
systemd.vim	205	0644	edit dl rm
systemverilog.vim	8629	0644	edit dl rm
tcl.vim	2542	0644	edit dl rm
tcsh.vim	1381	0644	edit dl rm
teraterm.vim	1413	0644	edit dl rm
tex.vim	13689	0644	edit dl rm
tf.vim	1549	0644	edit dl rm
tilde.vim	1013	0644	edit dl rm
treetop.vim	708	0644	edit dl rm
typescript.vim	14481	0644	edit dl rm
vb.vim	2089	0644	edit dl rm
verilog.vim	8168	0644	edit dl rm
vhdl.vim	14666	0644	edit dl rm
vim.vim	5764	0644	edit dl rm
vroom.vim	379	0644	edit dl rm
wast.vim	458	0644	edit dl rm
xf86conf.vim	709	0644	edit dl rm
xhtml.vim	269	0644	edit dl rm
xinetd.vim	1231	0644	edit dl rm
xml.vim	7784	0644	edit dl rm
xsd.vim	253	0644	edit dl rm
xslt.vim	297	0644	edit dl rm
yacc.vim	781	0644	edit dl rm
yaml.vim	5471	0644	edit dl rm
zimbu.vim	3947	0644	edit dl rm
zsh.vim	411	0644	edit dl rm

Edit: /usr/share/vim/vim82/indent/ruby.vim (30148B)

" Vim indent file
" Language:		Ruby
" Maintainer:		Andrew Radev <andrey.radev@gmail.com>
" Previous Maintainer:	Nikolai Weibull <now at bitwi.se>
" URL:			https://github.com/vim-ruby/vim-ruby
" Release Coordinator:	Doug Kearns <dougkearns@gmail.com>
" Last Change:		2021 Feb 03

" 0. Initialization {{{1
" =================

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

if !exists('g:ruby_indent_access_modifier_style')
  " Possible values: "normal", "indent", "outdent"
  let g:ruby_indent_access_modifier_style = 'normal'
endif

if !exists('g:ruby_indent_assignment_style')
  " Possible values: "variable", "hanging"
  let g:ruby_indent_assignment_style = 'hanging'
endif

if !exists('g:ruby_indent_block_style')
  " Possible values: "expression", "do"
  let g:ruby_indent_block_style = 'do'
endif

if !exists('g:ruby_indent_hanging_elements')
  " Non-zero means hanging indents are enabled, zero means disabled
  let g:ruby_indent_hanging_elements = 1
endif

setlocal nosmartindent

" Now, set up our indentation expression and keys that trigger it.
setlocal indentexpr=GetRubyIndent(v:lnum)
setlocal indentkeys=0{,0},0),0],!^F,o,O,e,:,.
setlocal indentkeys+==end,=else,=elsif,=when,=ensure,=rescue,==begin,==end
setlocal indentkeys+==private,=protected,=public

" Only define the function once.
if exists("*GetRubyIndent")
  finish
endif

let s:cpo_save = &cpo
set cpo&vim

" 1. Variables {{{1
" ============

" Syntax group names that are strings.
let s:syng_string =
      \ ['String', 'Interpolation', 'InterpolationDelimiter', 'StringEscape']

" Syntax group names that are strings or documentation.
let s:syng_stringdoc = s:syng_string + ['Documentation']

" Syntax group names that are or delimit strings/symbols/regexes or are comments.
let s:syng_strcom = s:syng_stringdoc + [
      \ 'Character',
      \ 'Comment',
      \ 'HeredocDelimiter',
      \ 'PercentRegexpDelimiter',
      \ 'PercentStringDelimiter',
      \ 'PercentSymbolDelimiter',
      \ 'Regexp',
      \ 'RegexpCharClass',
      \ 'RegexpDelimiter',
      \ 'RegexpEscape',
      \ 'StringDelimiter',
      \ 'Symbol',
      \ 'SymbolDelimiter',
      \ ]

" Expression used to check whether we should skip a match with searchpair().
let s:skip_expr =
      \ 'index(map('.string(s:syng_strcom).',"hlID(''ruby''.v:val)"), synID(line("."),col("."),1)) >= 0'

" Regex that defines the start-match for the 'end' keyword.
"let s:end_start_regex = '\%(^\|[^.]\)\<\%(module\|class\|def\|if\|for\|while\|until\|case\|unless\|begin\|do\)\>'
" TODO: the do here should be restricted somewhat (only at end of line)?
let s:end_start_regex =
      \ '\C\%(^\s*\|[=,*/%+\-|;{]\|<<\|>>\|:\s\)\s*\zs' .
      \ '\<\%(module\|class\|if\|for\|while\|until\|case\|unless\|begin' .
      \   '\|\%(\K\k*[!?]\?\s\+\)\=def\):\@!\>' .
      \ '\|\%(^\|[^.:@$]\)\@<=\<do:\@!\>'

" Regex that defines the end-match for the 'end' keyword.
let s:end_end_regex = '\%(^\|[^.:@$]\)\@<=\<end:\@!\>'

" Expression used for searchpair() call for finding match for 'end' keyword.
let s:end_skip_expr = s:skip_expr .
      \ ' || (expand("<cword>") == "do"' .
      \ ' && getline(".") =~ "^\\s*\\<\$while\\|until\\|for\$:\\@!\\>")'

" Regex that defines continuation lines, not including (, {, or [.
let s:non_bracket_continuation_regex =
      \ '\%([\\.,:*/%+]\|\<and\|\<or\|\%(<%\)\@<![=-]\|:\@<![^[:alnum:]:][|&?]\|||\|&&\)\s*\%(#.*\)\=$'

" Regex that defines continuation lines.
let s:continuation_regex =
      \ '\%(%\@<![({[\\.,:*/%+]\|\<and\|\<or\|\%(<%\)\@<![=-]\|:\@<![^[:alnum:]:][|&?]\|||\|&&\)\s*\%(#.*\)\=$'

" Regex that defines continuable keywords
let s:continuable_regex =
      \ '\C\%(^\s*\|[=,*/%+\-|;{]\|<<\|>>\|:\s\)\s*\zs' .
      \ '\<\%(if\|for\|while\|until\|unless\):\@!\>'

" Regex that defines bracket continuations
let s:bracket_continuation_regex = '%\@<!\%([({[]\)\s*\%(#.*\)\=$'

" Regex that defines dot continuations
let s:dot_continuation_regex = '%\@<!\.\s*\%(#.*\)\=$'

" Regex that defines backslash continuations
let s:backslash_continuation_regex = '%\@<!\\\s*$'

" Regex that defines end of bracket continuation followed by another continuation
let s:bracket_switch_continuation_regex = '^$[^(]\+\zs).\+$\+'.s:continuation_regex

" Regex that defines the first part of a splat pattern
let s:splat_regex = '[[,(]\s*\*\s*\%(#.*\)\=$'

" Regex that describes all indent access modifiers
let s:access_modifier_regex = '\C^\s*\%(public\|protected\|private\)\s*\%(#.*\)\=$'

" Regex that describes the indent access modifiers (excludes public)
let s:indent_access_modifier_regex = '\C^\s*\%(protected\|private\)\s*\%(#.*\)\=$'

" Regex that defines blocks.
"
" Note that there's a slight problem with this regex and s:continuation_regex.
" Code like this will be matched by both:
"
"   method_call do |(a, b)|
"
" The reason is that the pipe matches a hanging "|" operator.
"
let s:block_regex =
      \ '\%(\<do:\@!\>\|%\@<!{\)\s*\%(|[^|]*|\)\=\s*\%(#.*\)\=$'

let s:block_continuation_regex = '^\s*[^])}\t ].*'.s:block_regex

" Regex that describes a leading operator (only a method call's dot for now)
let s:leading_operator_regex = '^\s*\%(&\=\.\)'

" 2. GetRubyIndent Function {{{1
" =========================

function! GetRubyIndent(...) abort
  " 2.1. Setup {{{2
  " ----------

let indent_info = {}

" The value of a single shift-width
  if exists('*shiftwidth')
    let indent_info.sw = shiftwidth()
  else
    let indent_info.sw = &sw
  endif

" For the current line, use the first argument if given, else v:lnum
  let indent_info.clnum = a:0 ? a:1 : v:lnum
  let indent_info.cline = getline(indent_info.clnum)

" Set up variables for restoring position in file.  Could use clnum here.
  let indent_info.col = col('.')

" 2.2. Work on the current line {{{2
  " -----------------------------
  let indent_callback_names = [
        \ 's:AccessModifier',
        \ 's:ClosingBracketOnEmptyLine',
        \ 's:BlockComment',
        \ 's:DeindentingKeyword',
        \ 's:MultilineStringOrLineComment',
        \ 's:ClosingHeredocDelimiter',
        \ 's:LeadingOperator',
        \ ]

for callback_name in indent_callback_names
"    Decho "Running: ".callback_name
    let indent = call(function(callback_name), [indent_info])

if indent >= 0
"      Decho "Match: ".callback_name." indent=".indent." info=".string(indent_info)
      return indent
    endif
  endfor

" 2.3. Work on the previous line. {{{2
  " -------------------------------

" Special case: we don't need the real s:PrevNonBlankNonString for an empty
  " line inside a string. And that call can be quite expensive in that
  " particular situation.
  let indent_callback_names = [
        \ 's:EmptyInsideString',
        \ ]

for callback_name in indent_callback_names
"    Decho "Running: ".callback_name
    let indent = call(function(callback_name), [indent_info])

if indent >= 0
"      Decho "Match: ".callback_name." indent=".indent." info=".string(indent_info)
      return indent
    endif
  endfor

" Previous line number
  let indent_info.plnum = s:PrevNonBlankNonString(indent_info.clnum - 1)
  let indent_info.pline = getline(indent_info.plnum)

let indent_callback_names = [
        \ 's:StartOfFile',
        \ 's:AfterAccessModifier',
        \ 's:ContinuedLine',
        \ 's:AfterBlockOpening',
        \ 's:AfterHangingSplat',
        \ 's:AfterUnbalancedBracket',
        \ 's:AfterLeadingOperator',
        \ 's:AfterEndKeyword',
        \ 's:AfterIndentKeyword',
        \ ]

for callback_name in indent_callback_names
"    Decho "Running: ".callback_name
    let indent = call(function(callback_name), [indent_info])

if indent >= 0
"      Decho "Match: ".callback_name." indent=".indent." info=".string(indent_info)
      return indent
    endif
  endfor

" 2.4. Work on the MSL line. {{{2
  " --------------------------
  let indent_callback_names = [
        \ 's:PreviousNotMSL',
        \ 's:IndentingKeywordInMSL',
        \ 's:ContinuedHangingOperator',
        \ ]

" Most Significant line based on the previous one -- in case it's a
  " continuation of something above
  let indent_info.plnum_msl = s:GetMSL(indent_info.plnum)

for callback_name in indent_callback_names
"    Decho "Running: ".callback_name
    let indent = call(function(callback_name), [indent_info])

if indent >= 0
"      Decho "Match: ".callback_name." indent=".indent." info=".string(indent_info)
      return indent
    endif
  endfor

" }}}2

" By default, just return the previous line's indent
"  Decho "Default case matched"
  return indent(indent_info.plnum)
endfunction

" 3. Indenting Logic Callbacks {{{1
" ============================

function! s:AccessModifier(cline_info) abort
  let info = a:cline_info

" If this line is an access modifier keyword, align according to the closest
  " class declaration.
  if g:ruby_indent_access_modifier_style == 'indent'
    if s:Match(info.clnum, s:access_modifier_regex)
      let class_lnum = s:FindContainingClass()
      if class_lnum > 0
        return indent(class_lnum) + info.sw
      endif
    endif
  elseif g:ruby_indent_access_modifier_style == 'outdent'
    if s:Match(info.clnum, s:access_modifier_regex)
      let class_lnum = s:FindContainingClass()
      if class_lnum > 0
        return indent(class_lnum)
      endif
    endif
  endif

return -1
endfunction

function! s:ClosingBracketOnEmptyLine(cline_info) abort
  let info = a:cline_info

" If we got a closing bracket on an empty line, find its match and indent
  " according to it.  For parentheses we indent to its column - 1, for the
  " others we indent to the containing line's MSL's level.  Return -1 if fail.
  let col = matchend(info.cline, '^\s*[]})]')

if col > 0 && !s:IsInStringOrComment(info.clnum, col)
    call cursor(info.clnum, col)
    let closing_bracket = info.cline[col - 1]
    let bracket_pair = strpart('(){}[]', stridx(')}]', closing_bracket) * 2, 2)

if searchpair(escape(bracket_pair[0], '\['), '', bracket_pair[1], 'bW', s:skip_expr) > 0
      if closing_bracket == ')' && col('.') != col('$') - 1
        if g:ruby_indent_hanging_elements
          let ind = virtcol('.') - 1
        else
          let ind = indent(line('.'))
        end
      elseif g:ruby_indent_block_style == 'do'
        let ind = indent(line('.'))
      else " g:ruby_indent_block_style == 'expression'
        let ind = indent(s:GetMSL(line('.')))
      endif
    endif

return ind
  endif

return -1
endfunction

function! s:BlockComment(cline_info) abort
  " If we have a =begin or =end set indent to first column.
  if match(a:cline_info.cline, '^\s*\%(=begin\|=end\)$') != -1
    return 0
  endif
  return -1
endfunction

function! s:DeindentingKeyword(cline_info) abort
  let info = a:cline_info

" If we have a deindenting keyword, find its match and indent to its level.
  " TODO: this is messy
  if s:Match(info.clnum, s:ruby_deindent_keywords)
    call cursor(info.clnum, 1)

if searchpair(s:end_start_regex, s:end_middle_regex, s:end_end_regex, 'bW',
          \ s:end_skip_expr) > 0
      let msl  = s:GetMSL(line('.'))
      let line = getline(line('.'))

if s:IsAssignment(line, col('.')) &&
            \ strpart(line, col('.') - 1, 2) !~ 'do'
        " assignment to case/begin/etc, on the same line
        if g:ruby_indent_assignment_style == 'hanging'
          " hanging indent
          let ind = virtcol('.') - 1
        else
          " align with variable
          let ind = indent(line('.'))
        endif
      elseif g:ruby_indent_block_style == 'do'
        " align to line of the "do", not to the MSL
        let ind = indent(line('.'))
      elseif getline(msl) =~ '=\s*$#.*$\=$'
        " in the case of assignment to the MSL, align to the starting line,
        " not to the MSL
        let ind = indent(line('.'))
      else
        " align to the MSL
        let ind = indent(msl)
      endif
    endif
    return ind
  endif

return -1
endfunction

function! s:MultilineStringOrLineComment(cline_info) abort
  let info = a:cline_info

" If we are in a multi-line string or line-comment, don't do anything to it.
  if s:IsInStringOrDocumentation(info.clnum, matchend(info.cline, '^\s*') + 1)
    return indent(info.clnum)
  endif
  return -1
endfunction

function! s:ClosingHeredocDelimiter(cline_info) abort
  let info = a:cline_info

" If we are at the closing delimiter of a "<<" heredoc-style string, set the
  " indent to 0.
  if info.cline =~ '^\k\+\s*$'
        \ && s:IsInStringDelimiter(info.clnum, 1)
        \ && search('\V<<'.info.cline, 'nbW') > 0
    return 0
  endif

return -1
endfunction

function! s:LeadingOperator(cline_info) abort
  " If the current line starts with a leading operator, add a level of indent.
  if s:Match(a:cline_info.clnum, s:leading_operator_regex)
    return indent(s:GetMSL(a:cline_info.clnum)) + a:cline_info.sw
  endif
  return -1
endfunction

function! s:EmptyInsideString(pline_info) abort
  " If the line is empty and inside a string (the previous line is a string,
  " too), use the previous line's indent
  let info = a:pline_info

let plnum = prevnonblank(info.clnum - 1)
  let pline = getline(plnum)

if info.cline =~ '^\s*$'
        \ && s:IsInStringOrComment(plnum, 1)
        \ && s:IsInStringOrComment(plnum, strlen(pline))
    return indent(plnum)
  endif
  return -1
endfunction

function! s:StartOfFile(pline_info) abort
  " At the start of the file use zero indent.
  if a:pline_info.plnum == 0
    return 0
  endif
  return -1
endfunction

function! s:AfterAccessModifier(pline_info) abort
  let info = a:pline_info

if g:ruby_indent_access_modifier_style == 'indent'
    " If the previous line was a private/protected keyword, add a
    " level of indent.
    if s:Match(info.plnum, s:indent_access_modifier_regex)
      return indent(info.plnum) + info.sw
    endif
  elseif g:ruby_indent_access_modifier_style == 'outdent'
    " If the previous line was a private/protected/public keyword, add
    " a level of indent, since the keyword has been out-dented.
    if s:Match(info.plnum, s:access_modifier_regex)
      return indent(info.plnum) + info.sw
    endif
  endif
  return -1
endfunction

" Example:
"
"   if foo || bar ||
"       baz || bing
"     puts "foo"
"   end
"
function! s:ContinuedLine(pline_info) abort
  let info = a:pline_info

let col = s:Match(info.plnum, s:ruby_indent_keywords)
  if s:Match(info.plnum, s:continuable_regex) &&
        \ s:Match(info.plnum, s:continuation_regex)
    if col > 0 && s:IsAssignment(info.pline, col)
      if g:ruby_indent_assignment_style == 'hanging'
        " hanging indent
        let ind = col - 1
      else
        " align with variable
        let ind = indent(info.plnum)
      endif
    else
      let ind = indent(s:GetMSL(info.plnum))
    endif
    return ind + info.sw + info.sw
  endif
  return -1
endfunction

function! s:AfterBlockOpening(pline_info) abort
  let info = a:pline_info

" If the previous line ended with a block opening, add a level of indent.
  if s:Match(info.plnum, s:block_regex)
    if g:ruby_indent_block_style == 'do'
      " don't align to the msl, align to the "do"
      let ind = indent(info.plnum) + info.sw
    else
      let plnum_msl = s:GetMSL(info.plnum)

if getline(plnum_msl) =~ '=\s*$#.*$\=$'
        " in the case of assignment to the msl, align to the starting line,
        " not to the msl
        let ind = indent(info.plnum) + info.sw
      else
        let ind = indent(plnum_msl) + info.sw
      endif
    endif

return ind
  endif

return -1
endfunction

function! s:AfterLeadingOperator(pline_info) abort
  " If the previous line started with a leading operator, use its MSL's level
  " of indent
  if s:Match(a:pline_info.plnum, s:leading_operator_regex)
    return indent(s:GetMSL(a:pline_info.plnum))
  endif
  return -1
endfunction

function! s:AfterHangingSplat(pline_info) abort
  let info = a:pline_info

" If the previous line ended with the "*" of a splat, add a level of indent
  if info.pline =~ s:splat_regex
    return indent(info.plnum) + info.sw
  endif
  return -1
endfunction

function! s:AfterUnbalancedBracket(pline_info) abort
  let info = a:pline_info

" If the previous line contained unclosed opening brackets and we are still
  " in them, find the rightmost one and add indent depending on the bracket
  " type.
  "
  " If it contained hanging closing brackets, find the rightmost one, find its
  " match and indent according to that.
  if info.pline =~ '[[({]' || info.pline =~ '[])}]\s*\%(#.*\)\=$'
    let [opening, closing] = s:ExtraBrackets(info.plnum)

if opening.pos != -1
      if !g:ruby_indent_hanging_elements
        return indent(info.plnum) + info.sw
      elseif opening.type == '(' && searchpair('(', '', ')', 'bW', s:skip_expr) > 0
        if col('.') + 1 == col('$')
          return indent(info.plnum) + info.sw
        else
          return virtcol('.')
        endif
      else
        let nonspace = matchend(info.pline, '\S', opening.pos + 1) - 1
        return nonspace > 0 ? nonspace : indent(info.plnum) + info.sw
      endif
    elseif closing.pos != -1
      call cursor(info.plnum, closing.pos + 1)
      normal! %

if s:Match(line('.'), s:ruby_indent_keywords)
        return indent('.') + info.sw
      else
        return indent(s:GetMSL(line('.')))
      endif
    else
      call cursor(info.clnum, info.col)
    end
  endif

return -1
endfunction

function! s:AfterEndKeyword(pline_info) abort
  let info = a:pline_info
  " If the previous line ended with an "end", match that "end"s beginning's
  " indent.
  let col = s:Match(info.plnum, '\%(^\|[^.:@$]\)\<end\>\s*\%(#.*\)\=$')
  if col > 0
    call cursor(info.plnum, col)
    if searchpair(s:end_start_regex, '', s:end_end_regex, 'bW',
          \ s:end_skip_expr) > 0
      let n = line('.')
      let ind = indent('.')
      let msl = s:GetMSL(n)
      if msl != n
        let ind = indent(msl)
      end
      return ind
    endif
  end
  return -1
endfunction

function! s:AfterIndentKeyword(pline_info) abort
  let info = a:pline_info
  let col = s:Match(info.plnum, s:ruby_indent_keywords)

if col > 0
    call cursor(info.plnum, col)
    let ind = virtcol('.') - 1 + info.sw
    " TODO: make this better (we need to count them) (or, if a searchpair
    " fails, we know that something is lacking an end and thus we indent a
    " level
    if s:Match(info.plnum, s:end_end_regex)
      let ind = indent('.')
    elseif s:IsAssignment(info.pline, col)
      if g:ruby_indent_assignment_style == 'hanging'
        " hanging indent
        let ind = col + info.sw - 1
      else
        " align with variable
        let ind = indent(info.plnum) + info.sw
      endif
    endif
    return ind
  endif

return -1
endfunction

function! s:PreviousNotMSL(msl_info) abort
  let info = a:msl_info

" If the previous line wasn't a MSL
  if info.plnum != info.plnum_msl
    " If previous line ends bracket and begins non-bracket continuation decrease indent by 1.
    if s:Match(info.plnum, s:bracket_switch_continuation_regex)
      " TODO (2016-10-07) Wrong/unused? How could it be "1"?
      return indent(info.plnum) - 1
      " If previous line is a continuation return its indent.
    elseif s:Match(info.plnum, s:non_bracket_continuation_regex)
      return indent(info.plnum)
    endif
  endif

return -1
endfunction

function! s:IndentingKeywordInMSL(msl_info) abort
  let info = a:msl_info
  " If the MSL line had an indenting keyword in it, add a level of indent.
  " TODO: this does not take into account contrived things such as
  " module Foo; class Bar; end
  let col = s:Match(info.plnum_msl, s:ruby_indent_keywords)
  if col > 0
    let ind = indent(info.plnum_msl) + info.sw
    if s:Match(info.plnum_msl, s:end_end_regex)
      let ind = ind - info.sw
    elseif s:IsAssignment(getline(info.plnum_msl), col)
      if g:ruby_indent_assignment_style == 'hanging'
        " hanging indent
        let ind = col + info.sw - 1
      else
        " align with variable
        let ind = indent(info.plnum_msl) + info.sw
      endif
    endif
    return ind
  endif
  return -1
endfunction

function! s:ContinuedHangingOperator(msl_info) abort
  let info = a:msl_info

" If the previous line ended with [*+/.,-=], but wasn't a block ending or a
  " closing bracket, indent one extra level.
  if s:Match(info.plnum_msl, s:non_bracket_continuation_regex) && !s:Match(info.plnum_msl, '^\s*$[\])}]\|end$')
    if info.plnum_msl == info.plnum
      let ind = indent(info.plnum_msl) + info.sw
    else
      let ind = indent(info.plnum_msl)
    endif
    return ind
  endif

return -1
endfunction

" 4. Auxiliary Functions {{{1
" ======================

function! s:IsInRubyGroup(groups, lnum, col) abort
  let ids = map(copy(a:groups), 'hlID("ruby".v:val)')
  return index(ids, synID(a:lnum, a:col, 1)) >= 0
endfunction

" Check if the character at lnum:col is inside a string, comment, or is ascii.
function! s:IsInStringOrComment(lnum, col) abort
  return s:IsInRubyGroup(s:syng_strcom, a:lnum, a:col)
endfunction

" Check if the character at lnum:col is inside a string.
function! s:IsInString(lnum, col) abort
  return s:IsInRubyGroup(s:syng_string, a:lnum, a:col)
endfunction

" Check if the character at lnum:col is inside a string or documentation.
function! s:IsInStringOrDocumentation(lnum, col) abort
  return s:IsInRubyGroup(s:syng_stringdoc, a:lnum, a:col)
endfunction

" Check if the character at lnum:col is inside a string delimiter
function! s:IsInStringDelimiter(lnum, col) abort
  return s:IsInRubyGroup(
        \ ['HeredocDelimiter', 'PercentStringDelimiter', 'StringDelimiter'],
        \ a:lnum, a:col
        \ )
endfunction

function! s:IsAssignment(str, pos) abort
  return strpart(a:str, 0, a:pos - 1) =~ '=\s*$'
endfunction

" Find line above 'lnum' that isn't empty, in a comment, or in a string.
function! s:PrevNonBlankNonString(lnum) abort
  let in_block = 0
  let lnum = prevnonblank(a:lnum)
  while lnum > 0
    " Go in and out of blocks comments as necessary.
    " If the line isn't empty (with opt. comment) or in a string, end search.
    let line = getline(lnum)
    if line =~ '^=begin'
      if in_block
        let in_block = 0
      else
        break
      endif
    elseif !in_block && line =~ '^=end'
      let in_block = 1
    elseif !in_block && line !~ '^\s*#.*$' && !(s:IsInStringOrComment(lnum, 1)
          \ && s:IsInStringOrComment(lnum, strlen(line)))
      break
    endif
    let lnum = prevnonblank(lnum - 1)
  endwhile
  return lnum
endfunction

" Find line above 'lnum' that started the continuation 'lnum' may be part of.
function! s:GetMSL(lnum) abort
  " Start on the line we're at and use its indent.
  let msl = a:lnum
  let lnum = s:PrevNonBlankNonString(a:lnum - 1)
  while lnum > 0
    " If we have a continuation line, or we're in a string, use line as MSL.
    " Otherwise, terminate search as we have found our MSL already.
    let line = getline(lnum)

if !s:Match(msl, s:backslash_continuation_regex) &&
          \ s:Match(lnum, s:backslash_continuation_regex)
      " If the current line doesn't end in a backslash, but the previous one
      " does, look for that line's msl
      "
      " Example:
      "   foo = "bar" \
      "     "baz"
      "
      let msl = lnum
    elseif s:Match(msl, s:leading_operator_regex)
      " If the current line starts with a leading operator, keep its indent
      " and keep looking for an MSL.
      let msl = lnum
    elseif s:Match(lnum, s:splat_regex)
      " If the above line looks like the "*" of a splat, use the current one's
      " indentation.
      "
      " Example:
      "   Hash[*
      "     method_call do
      "       something
      "
      return msl
    elseif s:Match(lnum, s:non_bracket_continuation_regex) &&
          \ s:Match(msl, s:non_bracket_continuation_regex)
      " If the current line is a non-bracket continuation and so is the
      " previous one, keep its indent and continue looking for an MSL.
      "
      " Example:
      "   method_call one,
      "     two,
      "     three
      "
      let msl = lnum
    elseif s:Match(lnum, s:dot_continuation_regex) &&
          \ (s:Match(msl, s:bracket_continuation_regex) || s:Match(msl, s:block_continuation_regex))
      " If the current line is a bracket continuation or a block-starter, but
      " the previous is a dot, keep going to see if the previous line is the
      " start of another continuation.
      "
      " Example:
      "   parent.
      "     method_call {
      "     three
      "
      let msl = lnum
    elseif s:Match(lnum, s:non_bracket_continuation_regex) &&
          \ (s:Match(msl, s:bracket_continuation_regex) || s:Match(msl, s:block_continuation_regex))
      " If the current line is a bracket continuation or a block-starter, but
      " the previous is a non-bracket one, respect the previous' indentation,
      " and stop here.
      "
      " Example:
      "   method_call one,
      "     two {
      "     three
      "
      return lnum
    elseif s:Match(lnum, s:bracket_continuation_regex) &&
          \ (s:Match(msl, s:bracket_continuation_regex) || s:Match(msl, s:block_continuation_regex))
      " If both lines are bracket continuations (the current may also be a
      " block-starter), use the current one's and stop here
      "
      " Example:
      "   method_call(
      "     other_method_call(
      "       foo
      return msl
    elseif s:Match(lnum, s:block_regex) &&
          \ !s:Match(msl, s:continuation_regex) &&
          \ !s:Match(msl, s:block_continuation_regex)
      " If the previous line is a block-starter and the current one is
      " mostly ordinary, use the current one as the MSL.
      "
      " Example:
      "   method_call do
      "     something
      "     something_else
      return msl
    else
      let col = match(line, s:continuation_regex) + 1
      if (col > 0 && !s:IsInStringOrComment(lnum, col))
            \ || s:IsInString(lnum, strlen(line))
        let msl = lnum
      else
        break
      endif
    endif

let lnum = s:PrevNonBlankNonString(lnum - 1)
  endwhile
  return msl
endfunction

" Check if line 'lnum' has more opening brackets than closing ones.
function! s:ExtraBrackets(lnum) abort
  let opening = {'parentheses': [], 'braces': [], 'brackets': []}
  let closing = {'parentheses': [], 'braces': [], 'brackets': []}

let line = getline(a:lnum)
  let pos  = match(line, '[][(){}]', 0)

" Save any encountered opening brackets, and remove them once a matching
  " closing one has been found. If a closing bracket shows up that doesn't
  " close anything, save it for later.
  while pos != -1
    if !s:IsInStringOrComment(a:lnum, pos + 1)
      if line[pos] == '('
        call add(opening.parentheses, {'type': '(', 'pos': pos})
      elseif line[pos] == ')'
        if empty(opening.parentheses)
          call add(closing.parentheses, {'type': ')', 'pos': pos})
        else
          let opening.parentheses = opening.parentheses[0:-2]
        endif
      elseif line[pos] == '{'
        call add(opening.braces, {'type': '{', 'pos': pos})
      elseif line[pos] == '}'
        if empty(opening.braces)
          call add(closing.braces, {'type': '}', 'pos': pos})
        else
          let opening.braces = opening.braces[0:-2]
        endif
      elseif line[pos] == '['
        call add(opening.brackets, {'type': '[', 'pos': pos})
      elseif line[pos] == ']'
        if empty(opening.brackets)
          call add(closing.brackets, {'type': ']', 'pos': pos})
        else
          let opening.brackets = opening.brackets[0:-2]
        endif
      endif
    endif

let pos = match(line, '[][(){}]', pos + 1)
  endwhile

" Find the rightmost brackets, since they're the ones that are important in
  " both opening and closing cases
  let rightmost_opening = {'type': '(', 'pos': -1}
  let rightmost_closing = {'type': ')', 'pos': -1}

for opening in opening.parentheses + opening.braces + opening.brackets
    if opening.pos > rightmost_opening.pos
      let rightmost_opening = opening
    endif
  endfor

for closing in closing.parentheses + closing.braces + closing.brackets
    if closing.pos > rightmost_closing.pos
      let rightmost_closing = closing
    endif
  endfor

return [rightmost_opening, rightmost_closing]
endfunction

function! s:Match(lnum, regex) abort
  let line   = getline(a:lnum)
  let offset = match(line, '\C'.a:regex)
  let col    = offset + 1

while offset > -1 && s:IsInStringOrComment(a:lnum, col)
    let offset = match(line, '\C'.a:regex, offset + 1)
    let col = offset + 1
  endwhile

if offset > -1
    return col
  else
    return 0
  endif
endfunction

" Locates the containing class/module's definition line, ignoring nested classes
" along the way.
"
function! s:FindContainingClass() abort
  let saved_position = getpos('.')

while searchpair(s:end_start_regex, s:end_middle_regex, s:end_end_regex, 'bW',
        \ s:end_skip_expr) > 0
    if expand('<cword>') =~# '\<class\|module\>'
      let found_lnum = line('.')
      call setpos('.', saved_position)
      return found_lnum
    endif
  endwhile

call setpos('.', saved_position)
  return 0
endfunction

" }}}1

let &cpo = s:cpo_save
unlet s:cpo_save

" vim:set sw=2 sts=2 ts=8 et:

cmd: