matlab.vim (4923B)
1 " Vim indent file 2 " Language: MATLAB 3 " Maintainer: Axel Forsman <axelsfor@gmail.com> 4 " Previous maintainer: Christophe Poucet <christophe.poucet@pandora.be> 5 " Last Update: 2021-10-01 6 7 " Only load if no other indent file is loaded 8 if exists('b:did_indent') | finish | endif 9 let b:did_indent = 1 10 11 setlocal indentexpr=GetMatlabIndent() 12 setlocal indentkeys=!,o,O,e,0=end,0=elseif,0=case,0=otherwise,0=catch,0=function,0=elsei 13 let b:undo_indent = "setlocal indentexpr< indentkeys<" 14 15 " The value of the Function indenting format in 16 " MATLAB Editor/Debugger Language Preferences. 17 " The possible values are 0 for Classic, 1 for Indent nested functions 18 " and 2 for Indent all functions (default). 19 let b:MATLAB_function_indent = get(g:, 'MATLAB_function_indent', 2) 20 " The previous value of b:changedtick 21 let b:MATLAB_lasttick = -1 22 " The previously indented line 23 let b:MATLAB_lastline = -1 24 " Whether the line above was a line continuation 25 let b:MATLAB_waslc = 0 26 let b:MATLAB_bracketlevel = 0 27 28 " Only define the function once 29 if exists("*GetMatlabIndent") | finish | endif 30 31 let s:keepcpo = &cpo 32 set cpo&vim 33 34 let s:end = '\<end\>\%([^({]*[)}]\)\@!' " Array indexing heuristic 35 let s:open_pat = 'for\|if\|parfor\|spmd\|switch\|try\|while\|classdef\|properties\|methods\|events\|enumeration' 36 let s:dedent_pat = '\C^\s*\zs\<\%(end\|else\|elseif\|catch\|\(case\|otherwise\|function\)\)\>' 37 let s:start_pat = '\C\<\%(function\|' . s:open_pat . '\)\>' 38 let s:bracket_pair_pat = '\(\[\|{\)\|\(\]\|}\)' 39 let s:zflag = has('patch-7.4.984') ? 'z' : '' 40 41 " Returns whether a comment or string envelops the specified column. 42 function! s:IsCommentOrString(lnum, col) 43 return synIDattr(synID(a:lnum, a:col, 1), "name") =~# 'matlabComment\|matlabMultilineComment\|matlabCellComment\|matlabString' 44 endfunction 45 46 " Returns whether the specified line continues on the next line. 47 function! s:IsLineContinuation(lnum) 48 let l = getline(a:lnum) | let c = -3 49 while 1 50 let c = match(l, '\.\{3}', c + 3) 51 if c == -1 | return 0 52 elseif !s:IsCommentOrString(a:lnum, c) | return 1 | endif 53 endwhile 54 endfunction 55 56 function! s:SubmatchCount(lnum, pattern, ...) 57 let endcol = a:0 >= 1 ? a:1 : 1 / 0 | let x = [0, 0, 0, 0] 58 call cursor(a:lnum, 1) 59 while 1 60 let [lnum, c, submatch] = searchpos(a:pattern, 'cpe' . s:zflag, a:lnum) 61 if !submatch || c >= endcol | break | endif 62 if !s:IsCommentOrString(lnum, c) | let x[submatch - 2] += 1 | endif 63 if cursor(0, c + 1) == -1 || col('.') == c | break | endif 64 endwhile 65 return x 66 endfunction 67 68 function! s:GetOpenCloseCount(lnum, pattern, ...) 69 let counts = call('s:SubmatchCount', [a:lnum, a:pattern] + a:000) 70 return counts[0] - counts[1] 71 endfunction 72 73 function! GetMatlabIndent() 74 let prevlnum = prevnonblank(v:lnum - 1) 75 76 if b:MATLAB_lasttick != b:changedtick || b:MATLAB_lastline != prevlnum 77 " Recalculate bracket count (only have to check same block and line above) 78 let b:MATLAB_bracketlevel = 0 79 let previndent = indent(prevlnum) | let l = prevlnum 80 while 1 81 let l = prevnonblank(l - 1) | let indent = indent(l) 82 if l <= 0 || previndent < indent | break | endif 83 let b:MATLAB_bracketlevel += s:GetOpenCloseCount(l, s:bracket_pair_pat) 84 if previndent != indent | break | endif 85 endwhile 86 87 let b:MATLAB_waslc = s:IsLineContinuation(prevlnum - 1) 88 endif 89 " If line above was blank it can impossibly have been a LC 90 let above_lc = b:MATLAB_lasttick == b:changedtick && prevlnum != v:lnum - 1 && b:MATLAB_lastline == prevlnum ? 0 : s:IsLineContinuation(v:lnum - 1) 91 92 let pair_pat = '\C\<\(' . s:open_pat . '\|' 93 \ . (b:MATLAB_function_indent == 1 ? '^\@<!' : '') 94 \ . (b:MATLAB_function_indent >= 1 ? 'function\|' : '') 95 \ . '\|\%(^\s*\)\@<=\%(else\|elseif\|case\|otherwise\|catch\)\)\>' 96 \ . '\|\S\s*\zs\(' . s:end . '\)' 97 let [open, close, b_open, b_close] = prevlnum ? s:SubmatchCount(prevlnum, 98 \ pair_pat . '\|' . s:bracket_pair_pat) : [0, 0, 0, 0] 99 let curbracketlevel = b:MATLAB_bracketlevel + b_open - b_close 100 101 call cursor(v:lnum, 1) 102 let submatch = search(s:dedent_pat, 'cp' . s:zflag, v:lnum) 103 if submatch && !s:IsCommentOrString(v:lnum, col('.')) 104 " Align end, et cetera with start of block 105 let [lnum, col] = searchpairpos(s:start_pat, '', '\C' . s:end, 'bW', 's:IsCommentOrString(line("."), col("."))') 106 let result = lnum ? indent(lnum) + shiftwidth() * (s:GetOpenCloseCount(lnum, pair_pat, col) + submatch == 2) : 0 107 else 108 " Count how many blocks the previous line opens/closes 109 " Line continuations/brackets indent once per statement 110 let result = (prevlnum > 0) * indent(prevlnum) + shiftwidth() * (open - close 111 \ + (b:MATLAB_bracketlevel ? -!curbracketlevel : !!curbracketlevel) 112 \ + (curbracketlevel <= 0) * (above_lc - b:MATLAB_waslc)) 113 endif 114 115 let b:MATLAB_waslc = above_lc 116 let b:MATLAB_bracketlevel = curbracketlevel 117 let b:MATLAB_lasttick = b:changedtick 118 let b:MATLAB_lastline = v:lnum 119 return result 120 endfunction 121 122 let &cpo = s:keepcpo 123 unlet s:keepcpo