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" 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