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ruby.vim
" 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> " 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 used for words that, at the start of a line, add a level of indent. let s:ruby_indent_keywords = \ '^\s*\zs\<\%(module\|class\|if\|for' . \ '\|while\|until\|else\|elsif\|case\|when\|unless\|begin\|ensure\|rescue' . \ '\|\%(\K\k*[!?]\?\s\+\)\=def\):\@!\>' . \ '\|\%([=,*/%+-]\|<<\|>>\|:\s\)\s*\zs' . \ '\<\%(if\|for\|while\|until\|case\|unless\|begin\):\@!\>' " Regex used for words that, at the start of a line, remove a level of indent. let s:ruby_deindent_keywords = \ '^\s*\zs\<\%(ensure\|else\|rescue\|elsif\|when\|end\):\@!\>' " 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 middle-match for the 'end' keyword. let s:end_middle_regex = '\<\%(ensure\|else\|\%(\%(^\|;\)\s*\)\@<=\<rescue:\@!\>\|when\|elsif\):\@!\>' " 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 " contination 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:
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