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7
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1 " Vim indent file
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2 " Language: Lua script
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22
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3 " Maintainer: Marcus Aurelius Farias <marcus.cf 'at' bol.com.br>
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4 " First Author: Max Ischenko <mfi 'at' ukr.net>
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6369
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5 " Last Change: 2014 Nov 12
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323
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6
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7 " Only load this indent file when no other was loaded.
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8 if exists("b:did_indent")
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9 finish
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10 endif
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11 let b:did_indent = 1
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7
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12
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359
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13 setlocal indentexpr=GetLuaIndent()
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14
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15 " To make Vim call GetLuaIndent() when it finds '\s*end' or '\s*until'
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16 " on the current line ('else' is default and includes 'elseif').
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17 setlocal indentkeys+=0=end,0=until
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18
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19 setlocal autoindent
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20
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7
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21 " Only define the function once.
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22
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22 if exists("*GetLuaIndent")
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23 finish
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24 endif
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7
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25
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26 function! GetLuaIndent()
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27 " Find a non-blank line above the current line.
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1620
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28 let prevlnum = prevnonblank(v:lnum - 1)
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7
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29
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30 " Hit the start of the file, use zero indent.
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1620
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31 if prevlnum == 0
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7
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32 return 0
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33 endif
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34
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359
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35 " Add a 'shiftwidth' after lines that start a block:
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36 " 'function', 'if', 'for', 'while', 'repeat', 'else', 'elseif', '{'
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1620
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37 let ind = indent(prevlnum)
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38 let prevline = getline(prevlnum)
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39 let midx = match(prevline, '^\s*\%(if\>\|for\>\|while\>\|repeat\>\|else\>\|elseif\>\|do\>\|then\>\)')
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40 if midx == -1
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41 let midx = match(prevline, '{\s*$')
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42 if midx == -1
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43 let midx = match(prevline, '\<function\>\s*\%(\k\|[.:]\)\{-}\s*(')
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44 endif
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7
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45 endif
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46
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1620
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47 if midx != -1
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48 " Add 'shiftwidth' if what we found previously is not in a comment and
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49 " an "end" or "until" is not present on the same line.
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50 if synIDattr(synID(prevlnum, midx + 1, 1), "name") != "luaComment" && prevline !~ '\<end\>\|\<until\>'
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51 let ind = ind + &shiftwidth
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52 endif
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7
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53 endif
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54
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55 " Subtract a 'shiftwidth' on end, else (and elseif), until and '}'
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56 " This is the part that requires 'indentkeys'.
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6369
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57 let midx = match(getline(v:lnum), '^\s*\%(end\>\|else\>\|until\>\|}\)')
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1620
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58 if midx != -1 && synIDattr(synID(v:lnum, midx + 1, 1), "name") != "luaComment"
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22
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59 let ind = ind - &shiftwidth
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7
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60 endif
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61
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62 return ind
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63 endfunction
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