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" Vim indent file " Language: Solidity " Maintainer: Cothi (jiungdev@gmail.com) " Original Author: tomlion (https://github.com/tomlion/vim-solidity) " Last Change: 2022 Sep 27 " 2023 Aug 22 Vim Project (undo_indent) " " Acknowledgement: Based off of vim-javascript " " 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 setlocal nosmartindent " Now, set up our indentation expression and keys that trigger it. setlocal indentexpr=GetSolidityIndent() setlocal indentkeys=0{,0},0),0],0\,,!^F,o,O,e let b:undo_indent = "setlocal indentexpr< indentkeys< smartindent<" " Only define the function once. if exists("*GetSolidityIndent") finish endif let s:cpo_save = &cpo set cpo&vim " 1. Variables {{{1 " ============ let s:js_keywords = '^\s*$break\|case\|catch\|continue\|debugger\|default\|delete\|do\|else\|finally\|for\|function\|if\|in\|instanceof\|new\|return\|switch\|this\|throw\|try\|typeof\|var\|void\|while\|with$' " Regex of syntax group names that are or delimit string or are comments. let s:syng_strcom = 'string\|regex\|comment\c' " Regex of syntax group names that are strings. let s:syng_string = 'regex\c' " Regex of syntax group names that are strings or documentation. let s:syng_multiline = 'comment\c' " Regex of syntax group names that are line comment. let s:syng_linecom = 'linecomment\c' " Expression used to check whether we should skip a match with searchpair(). let s:skip_expr = "synIDattr(synID(line('.'),col('.'),1),'name') =~ '".s:syng_strcom."'" let s:line_term = '\s*\%(\%(\/\/\).*\)\=$' " Regex that defines continuation lines, not including (, {, or [. let s:continuation_regex = '\%([\\*+/.:]\|\%(<%\)\@<![=-]\|\W[|&?]\|||\|&&\)' . s:line_term " Regex that defines continuation lines. " TODO: this needs to deal with if ...: and so on let s:msl_regex = '\%([\\*+/.:([]\|\%(<%\)\@<![=-]\|\W[|&?]\|||\|&&\)' . s:line_term let s:one_line_scope_regex = '\<\%(if\|else\|for\|while\)\>[^{;]*' . s:line_term " Regex that defines blocks. let s:block_regex = '\%([{[]\)\s*\%(|\%([*@]\=\h\w*,\=\s*\)\%(,\s*[*@]\=\h\w*\)*|\)\=' . s:line_term let s:var_stmt = '^\s*var' let s:comma_first = '^\s*,' let s:comma_last = ',\s*$' let s:ternary = '^\s\+[?|:]' let s:ternary_q = '^\s\+?' " 2. Auxiliary Functions {{{1 " ====================== " 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), 'name') =~ s:syng_strcom endfunction " Check if the character at lnum:col is inside a string. function s:IsInString(lnum, col) return synIDattr(synID(a:lnum, a:col, 1), 'name') =~ s:syng_string endfunction " 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) && synIDattr(synID(a:lnum, a:col, 1), 'name') =~ s:syng_multiline endfunction " Check if the character at lnum:col is a line comment. function s:IsLineComment(lnum, col) return synIDattr(synID(a:lnum, a:col, 1), 'name') =~ s:syng_linecom endfunction " Find line above 'lnum' that isn't empty, in a comment, or in a string. function s:PrevNonBlankNonString(lnum) 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 =~ '/\*' if in_block let in_block = 0 else break endif elseif !in_block && line =~ '\*/' let in_block = 1 elseif !in_block && line !~ '^\s*\%(//\).*$' && !(s:IsInStringOrComment(lnum, 1) && s:IsInStringOrComment(lnum, strlen(line))) break endif let lnum = prevnonblank(lnum - 1) endwhile return lnum endfunction " Find line above 'lnum' that started the continuation 'lnum' may be part of. function s:GetMSL(lnum, in_one_line_scope) " Start on the line we're at and use its indent. let msl = a:lnum let lnum = s:PrevNonBlankNonString(a:lnum - 1) while lnum > 0 " If we have a continuation line, or we're in a string, use line as MSL. " Otherwise, terminate search as we have found our MSL already. let line = getline(lnum) let col = match(line, s:msl_regex) + 1 if (col > 0 && !s:IsInStringOrComment(lnum, col)) || s:IsInString(lnum, strlen(line)) let msl = lnum else " Don't use lines that are part of a one line scope as msl unless the " flag in_one_line_scope is set to 1 " if a:in_one_line_scope break end let msl_one_line = s:Match(lnum, s:one_line_scope_regex) if msl_one_line == 0 break endif endif let lnum = s:PrevNonBlankNonString(lnum - 1) endwhile return msl endfunction function s:RemoveTrailingComments(content) let single = '\/\/$.*$\s*$' let multi = '\/\*$.*$\*\/\s*$' return substitute(substitute(a:content, single, '', ''), multi, '', '') endfunction " Find if the string is inside var statement (but not the first string) function s:InMultiVarStatement(lnum) let lnum = s:PrevNonBlankNonString(a:lnum - 1) " let type = synIDattr(synID(lnum, indent(lnum) + 1, 0), 'name') " loop through previous expressions to find a var statement while lnum > 0 let line = getline(lnum) " if the line is a js keyword if (line =~ s:js_keywords) " check if the line is a var stmt " if the line has a comma first or comma last then we can assume that we " are in a multiple var statement if (line =~ s:var_stmt) return lnum endif " other js keywords, not a var return 0 endif let lnum = s:PrevNonBlankNonString(lnum - 1) endwhile " beginning of program, not a var return 0 endfunction " Find line above with beginning of the var statement or returns 0 if it's not " 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)) " if the previous line doesn't end in a comma, return to regular indent if (line !~ s:comma_last) return indent(prev_lnum) - &sw else return indent(lvar) + &sw endif endif return -1 endfunction " Check if line 'lnum' 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, '[][(){}]', 0) while pos != -1 if !s:IsInStringOrComment(a:lnum, pos + 1) let idx = stridx('(){}[]', 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, '[][(){}]', pos + 1) endwhile return (open_0 > 0) . (open_2 > 0) . (open_4 > 0) endfunction function s:Match(lnum, regex) let col = match(getline(a:lnum), a:regex) + 1 return col > 0 && !s:IsInStringOrComment(a:lnum, col) ? col : 0 endfunction function s:IndentWithContinuation(lnum, ind, width) " 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) " If the previous line wasn't a MSL and is continuation return its indent. " 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 " Set up more variables now that we know we aren't continuation bound. let msl_ind = indent(lnum) " If the previous line ended with [*+/.-=], start a continuation that " 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 > 0 && 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 > 0 " 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 " 3. GetSolidityIndent Function {{{1 " ========================= function GetSolidityIndent() " 3.1. Setup {{{2 " ---------- " Set up variables for restoring position in file. Could use v:lnum here. let vcol = col('.') " 3.2. Work on the current line {{{2 " ----------------------------- let ind = -1 " Get the current line. let line = getline(v:lnum) " previous nonblank line number let prevline = prevnonblank(v:lnum - 1) " 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(line, '^\s*[],})]') if col > 0 && !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)) " check for comma first if (line[col - 1] =~ ',') " if the previous line ends in comma or semicolon don't indent if (prevline_contents =~ '[;,]\s*$') return indent(s:GetMSL(line('.'), 0)) " get previous line indent, if it's comma first return prevline indent elseif (prevline_contents =~ s:comma_first) return indent(prevline) " otherwise we indent 1 level else return indent(lvar) + &sw endif endif endif let bs = strpart('(){}[]', stridx(')}]', line[col - 1]) * 2, 2) if searchpair(escape(bs[0], '\['), '', bs[1], 'bW', s:skip_expr) > 0 if line[col-1]==')' && col('.') != col('$') - 1 let ind = virtcol('.')-1 else let ind = indent(s:GetMSL(line('.'), 0)) endif endif return ind endif " If the line is comma first, dedent 1 level if (getline(prevline) =~ s:comma_first) return indent(prevline) - &sw endif if (line =~ s:ternary) if (getline(prevline) =~ s:ternary_q) return indent(prevline) else return indent(prevline) + &sw endif endif " If we are in a multi-line comment, cindent does the right thing. if s:IsInMultilineComment(v:lnum, 1) && !s:IsLineComment(v:lnum, 1) return cindent(v:lnum) endif " Check for multiple var assignments " let var_indent = s:GetVarIndent(v:lnum) " if var_indent >= 0 " return var_indent " endif " 3.3. Work on the previous line. {{{2 " ------------------------------- " If the line is empty and the previous nonblank line was a multi-line " comment, use that comment's indent. Deduct one char to account for the " space in ' */'. if line =~ '^\s*$' && s:IsInMultilineComment(prevline, 1) return indent(prevline) - 1 endif " Find a non-blank, non-multi-line string line above the current line. let lnum = s:PrevNonBlankNonString(v:lnum - 1) " If the line is empty and inside a string, use the previous line. if line =~ '^\s*$' && lnum != prevline return indent(prevnonblank(v:lnum)) endif " At the start of the file use zero indent. if lnum == 0 return 0 endif " Set up variables for current line. let line = getline(lnum) let ind = indent(lnum) " If the previous line ended with a block opening, add a level of indent. if s:Match(lnum, s:block_regex) return indent(s:GetMSL(lnum, 0)) + &sw endif " If the previous line contained an opening bracket, and we are still in it, " add indent depending on the bracket type. if line =~ '[[({]' let counts = s:LineHasOpeningBrackets(lnum) if counts[0] == '1' && searchpair('(', '', ')', 'bW', s:skip_expr) > 0 if col('.') + 1 == col('$') return ind + &sw else return virtcol('.') endif elseif counts[1] == '1' || counts[2] == '1' return ind + &sw else call cursor(v:lnum, vcol) end endif " 3.4. Work on the MSL line. {{{2 " -------------------------- let ind_con = ind let ind = s:IndentWithContinuation(lnum, ind_con, &sw) " }}}2 " " let ols = s:InOneLineScope(lnum) if ols > 0 let ind = ind + &sw else let ols = s:ExitingOneLineScope(lnum) while ols > 0 && ind > 0 let ind = ind - &sw let ols = s:InOneLineScope(ols - 1) endwhile endif return ind endfunction " }}}1 let &cpo = s:cpo_save unlet s:cpo_save