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Diffstat (limited to '')
| -rw-r--r-- | runtime/indent/meson.vim | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/runtime/indent/meson.vim b/runtime/indent/meson.vim new file mode 100644 index 0000000..f116781 --- /dev/null +++ b/runtime/indent/meson.vim @@ -0,0 +1,180 @@ +" Vim indent file +" Language: Meson +" License: VIM License +" Maintainer: Nirbheek Chauhan <nirbheek.chauhan@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) + +" 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 |