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Diffstat (limited to 'runtime/indent/matlab.vim')
| -rw-r--r-- | runtime/indent/matlab.vim | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/runtime/indent/matlab.vim b/runtime/indent/matlab.vim new file mode 100644 index 0000000..10d8460 --- /dev/null +++ b/runtime/indent/matlab.vim @@ -0,0 +1,123 @@ +" Vim indent file +" Language: MATLAB +" Maintainer: Axel Forsman <axelsfor@gmail.com> +" Previous maintainer: Christophe Poucet <christophe.poucet@pandora.be> +" Last Update: 2021-10-01 + +" Only load if no other indent file is loaded +if exists('b:did_indent') | finish | endif +let b:did_indent = 1 + +setlocal indentexpr=GetMatlabIndent() +setlocal indentkeys=!,o,O,e,0=end,0=elseif,0=case,0=otherwise,0=catch,0=function,0=elsei +let b:undo_indent = "setlocal indentexpr< indentkeys<" + +" The value of the Function indenting format in +" MATLAB Editor/Debugger Language Preferences. +" The possible values are 0 for Classic, 1 for Indent nested functions +" and 2 for Indent all functions (default). +let b:MATLAB_function_indent = get(g:, 'MATLAB_function_indent', 2) +" The previous value of b:changedtick +let b:MATLAB_lasttick = -1 +" The previously indented line +let b:MATLAB_lastline = -1 +" Whether the line above was a line continuation +let b:MATLAB_waslc = 0 +let b:MATLAB_bracketlevel = 0 + +" Only define the function once +if exists("*GetMatlabIndent") | finish | endif + +let s:keepcpo = &cpo +set cpo&vim + +let s:end = '\<end\>\%([^({]*[)}]\)\@!' " Array indexing heuristic +let s:open_pat = 'for\|if\|parfor\|spmd\|switch\|try\|while\|classdef\|properties\|methods\|events\|enumeration' +let s:dedent_pat = '\C^\s*\zs\<\%(end\|else\|elseif\|catch\|\(case\|otherwise\|function\)\)\>' +let s:start_pat = '\C\<\%(function\|' . s:open_pat . '\)\>' +let s:bracket_pair_pat = '\(\[\|{\)\|\(\]\|}\)' +let s:zflag = has('patch-7.4.984') ? 'z' : '' + +" Returns whether a comment or string envelops the specified column. +function! s:IsCommentOrString(lnum, col) + return synIDattr(synID(a:lnum, a:col, 1), "name") =~# 'matlabComment\|matlabMultilineComment\|matlabCellComment\|matlabString' +endfunction + +" Returns whether the specified line continues on the next line. +function! s:IsLineContinuation(lnum) + let l = getline(a:lnum) | let c = -3 + while 1 + let c = match(l, '\.\{3}', c + 3) + if c == -1 | return 0 + elseif !s:IsCommentOrString(a:lnum, c) | return 1 | endif + endwhile +endfunction + +function! s:SubmatchCount(lnum, pattern, ...) + let endcol = a:0 >= 1 ? a:1 : 1 / 0 | let x = [0, 0, 0, 0] + call cursor(a:lnum, 1) + while 1 + let [lnum, c, submatch] = searchpos(a:pattern, 'cpe' . s:zflag, a:lnum) + if !submatch || c >= endcol | break | endif + if !s:IsCommentOrString(lnum, c) | let x[submatch - 2] += 1 | endif + if cursor(0, c + 1) == -1 || col('.') == c | break | endif + endwhile + return x +endfunction + +function! s:GetOpenCloseCount(lnum, pattern, ...) + let counts = call('s:SubmatchCount', [a:lnum, a:pattern] + a:000) + return counts[0] - counts[1] +endfunction + +function! GetMatlabIndent() + let prevlnum = prevnonblank(v:lnum - 1) + + if b:MATLAB_lasttick != b:changedtick || b:MATLAB_lastline != prevlnum + " Recalculate bracket count (only have to check same block and line above) + let b:MATLAB_bracketlevel = 0 + let previndent = indent(prevlnum) | let l = prevlnum + while 1 + let l = prevnonblank(l - 1) | let indent = indent(l) + if l <= 0 || previndent < indent | break | endif + let b:MATLAB_bracketlevel += s:GetOpenCloseCount(l, s:bracket_pair_pat) + if previndent != indent | break | endif + endwhile + + let b:MATLAB_waslc = s:IsLineContinuation(prevlnum - 1) + endif + " If line above was blank it can impossibly have been a LC + let above_lc = b:MATLAB_lasttick == b:changedtick && prevlnum != v:lnum - 1 && b:MATLAB_lastline == prevlnum ? 0 : s:IsLineContinuation(v:lnum - 1) + + let pair_pat = '\C\<\(' . s:open_pat . '\|' + \ . (b:MATLAB_function_indent == 1 ? '^\@<!' : '') + \ . (b:MATLAB_function_indent >= 1 ? 'function\|' : '') + \ . '\|\%(^\s*\)\@<=\%(else\|elseif\|case\|otherwise\|catch\)\)\>' + \ . '\|\S\s*\zs\(' . s:end . '\)' + let [open, close, b_open, b_close] = prevlnum ? s:SubmatchCount(prevlnum, + \ pair_pat . '\|' . s:bracket_pair_pat) : [0, 0, 0, 0] + let curbracketlevel = b:MATLAB_bracketlevel + b_open - b_close + + call cursor(v:lnum, 1) + let submatch = search(s:dedent_pat, 'cp' . s:zflag, v:lnum) + if submatch && !s:IsCommentOrString(v:lnum, col('.')) + " Align end, et cetera with start of block + let [lnum, col] = searchpairpos(s:start_pat, '', '\C' . s:end, 'bW', 's:IsCommentOrString(line("."), col("."))') + let result = lnum ? indent(lnum) + shiftwidth() * (s:GetOpenCloseCount(lnum, pair_pat, col) + submatch == 2) : 0 + else + " Count how many blocks the previous line opens/closes + " Line continuations/brackets indent once per statement + let result = (prevlnum > 0) * indent(prevlnum) + shiftwidth() * (open - close + \ + (b:MATLAB_bracketlevel ? -!curbracketlevel : !!curbracketlevel) + \ + (curbracketlevel <= 0) * (above_lc - b:MATLAB_waslc)) + endif + + let b:MATLAB_waslc = above_lc + let b:MATLAB_bracketlevel = curbracketlevel + let b:MATLAB_lasttick = b:changedtick + let b:MATLAB_lastline = v:lnum + return result +endfunction + +let &cpo = s:keepcpo +unlet s:keepcpo |