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1 " Vim indent file
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2 " Language: Lua script
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3 " Maintainer: Marcus Aurelius Farias <marcuscf@vant.com.br>
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4 " First Author: Max Ischenko <mfi@ukr.net>
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5 " Last Change: 2003 Jan 20
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6
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7 " Only define the function once.
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8 if exists("*GetLuaIndent") | finish | endif
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9
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10 setlocal indentexpr=GetLuaIndent()
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11
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12 " To make Vim call GetLuaIndent() when it finds '\s*end' or '\s*until'
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13 " on the current line (else is default).
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14 setlocal indentkeys+=0=end,0=until
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15
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16 setlocal autoindent
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17
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18 function! GetLuaIndent()
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19 " Find a non-blank line above the current line.
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20 let lnum = prevnonblank(v:lnum - 1)
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21
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22 " Hit the start of the file, use zero indent.
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23 if lnum == 0
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24 return 0
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25 endif
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26
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27 " Add a 'shiftwidth' after lines beginning with:
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28 " function, if, for, while, repeat, else, elseif, '{'
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29 let ind = indent(lnum)
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30 let flag = 0
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31 if getline(lnum) =~ '^\s*\(function\>\|if\>\|for\>\|while\>\|repeat\>\|else\>\|elseif\>\|do\>\)' || getline(lnum) =~ '{\s*$' || getline(lnum) =~ '\s*=\s*function'
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32 let ind = ind + &sw
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33 let flag = 1
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34 endif
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35
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36 " Subtract a 'shiftwidth' after lines ending with
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37 " 'end' when they begin with while, if, for, etc.
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38 if flag == 1 && getline(lnum) =~ '\<end\>\|\<until\>'
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39 let ind = ind - &sw
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40 endif
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41
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42 " Subtract a 'shiftwidth' on end, else (and elseif), until and '}'
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43 " This is the part that requires 'indentkeys'.
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44 if getline(v:lnum) =~ '^\s*\(end\|else\|until\|}\)'
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45 let ind = ind - &sw
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46 endif
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47
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48 return ind
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49 endfunction
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