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meson.vim
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" Vim indent file " Language: Meson " License: VIM License " Maintainer: Nirbheek Chauhan <nirbheek.chauhan@gmail.com> " Liam Beguin <liambeguin@gmail.com> " Original Authors: David Bustos <bustos@caltech.edu> " Bram Moolenaar <Bram@vim.org> " Last Change: 2019 Oct 18 " Only load this indent file when no other was loaded. if exists("b:did_indent") finish endif let b:did_indent = 1 " Some preliminary settings setlocal nolisp " Make sure lisp indenting doesn't supersede us setlocal autoindent " indentexpr isn't much help otherwise setlocal indentexpr=GetMesonIndent(v:lnum) setlocal indentkeys+==elif,=else,=endforeach,=endif,0) let b:undo_indent = "setl ai< inde< indk< lisp<" " Only define the function once. if exists("*GetMesonIndent") finish endif let s:keepcpo= &cpo set cpo&vim " Come here when loading the script the first time. let s:maxoff = 50 " maximum number of lines to look backwards for () function GetMesonIndent(lnum) echom getline(line(".")) " If this line is explicitly joined: If the previous line was also joined, " line it up with that one, otherwise add two 'shiftwidth' if getline(a:lnum - 1) =~ '\\$' if a:lnum > 1 && getline(a:lnum - 2) =~ '\\$' return indent(a:lnum - 1) endif return indent(a:lnum - 1) + (exists("g:mesonindent_continue") ? eval(g:mesonindent_continue) : (shiftwidth() * 2)) endif " If the start of the line is in a string don't change the indent. if has('syntax_items') \ && synIDattr(synID(a:lnum, 1, 1), "name") =~ "String$" return -1 endif " Search backwards for the previous non-empty line. let plnum = prevnonblank(v:lnum - 1) if plnum == 0 " This is the first non-empty line, use zero indent. return 0 endif " If the previous line is inside parenthesis, use the indent of the starting " line. " Trick: use the non-existing "dummy" variable to break out of the loop when " going too far back. call cursor(plnum, 1) let parlnum = searchpair('(\|{\|\[', '', ')\|}\|\]', 'nbW', \ "line('.') < " . (plnum - s:maxoff) . " ? dummy :" \ . " synIDattr(synID(line('.'), col('.'), 1), 'name')" \ . " =~ '\\(Comment\\|Todo\\|String\\)$'") if parlnum > 0 let plindent = indent(parlnum) let plnumstart = parlnum else let plindent = indent(plnum) let plnumstart = plnum endif " When inside parenthesis: If at the first line below the parenthesis add " a 'shiftwidth', otherwise same as previous line. " i = (a " + b " + c) call cursor(a:lnum, 1) let p = searchpair('(\|{\|\[', '', ')\|}\|\]', 'bW', \ "line('.') < " . (a:lnum - s:maxoff) . " ? dummy :" \ . " synIDattr(synID(line('.'), col('.'), 1), 'name')" \ . " =~ '\\(Comment\\|Todo\\|String\\)$'") if p > 0 if p == plnum " When the start is inside parenthesis, only indent one 'shiftwidth'. let pp = searchpair('(\|{\|\[', '', ')\|}\|\]', 'bW', \ "line('.') < " . (a:lnum - s:maxoff) . " ? dummy :" \ . " synIDattr(synID(line('.'), col('.'), 1), 'name')" \ . " =~ '\\(Comment\\|Todo\\|String\\)$'") if pp > 0 return indent(plnum) + (exists("g:pyindent_nested_paren") ? eval(g:pyindent_nested_paren) : shiftwidth()) endif return indent(plnum) + (exists("g:pyindent_open_paren") ? eval(g:pyindent_open_paren) : shiftwidth()) endif if plnumstart == p return indent(plnum) endif return plindent endif " Get the line and remove a trailing comment. " Use syntax highlighting attributes when possible. let pline = getline(plnum) let pline_len = strlen(pline) if has('syntax_items') " If the last character in the line is a comment, do a binary search for " the start of the comment. synID() is slow, a linear search would take " too long on a long line. if synIDattr(synID(plnum, pline_len, 1), "name") =~ "\\(Comment\\|Todo\\)$" let min = 1 let max = pline_len while min < max let col = (min + max) / 2 if synIDattr(synID(plnum, col, 1), "name") =~ "\\(Comment\\|Todo\\)$" let max = col else let min = col + 1 endif endwhile let pline = strpart(pline, 0, min - 1) endif else let col = 0 while col < pline_len if pline[col] == '#' let pline = strpart(pline, 0, col) break endif let col = col + 1 endwhile endif " If the previous line ended the conditional/loop if getline(plnum) =~ '^\s*\(endif\|endforeach\)\>\s*' " Maintain indent return -1 endif " If the previous line ended with a builtin, indent this line if pline =~ '^\s*\(foreach\|if\|else\|elif\)\>\s*' return plindent + shiftwidth() endif " If the current line begins with a header keyword, deindent if getline(a:lnum) =~ '^\s*\(else\|elif\|endif\|endforeach\)' " Unless the previous line was a one-liner if getline(plnumstart) =~ '^\s*\(foreach\|if\)\>\s*' return plindent endif " Or the user has already dedented if indent(a:lnum) <= plindent - shiftwidth() return -1 endif return plindent - shiftwidth() endif " When after a () construct we probably want to go back to the start line. " a = (b " + c) " here if parlnum > 0 return plindent endif return -1 endfunction let &cpo = s:keepcpo unlet s:keepcpo " vim:sw=2