3 " Maintainer: Marcus Aurelius Farias <marcus.cf 'at' bol.com.br>
4 " First Author: Max Ischenko <mfi 'at' ukr.net>
5 " Last Change: 2007 Jul 23
7 " Only load this indent file when no other was loaded.
8 if exists("b:did_indent")
13 setlocal indentexpr=GetLuaIndent()
15 " To make Vim call GetLuaIndent() when it finds '\s*end' or '\s*until'
16 " on the current line ('else' is default and includes 'elseif').
17 setlocal indentkeys+=0=end,0=until
21 " Only define the function once.
22 if exists("*GetLuaIndent")
26 function! GetLuaIndent()
27 " Find a non-blank line above the current line.
28 let prevlnum = prevnonblank(v:lnum - 1)
30 " Hit the start of the file, use zero indent.
35 " Add a 'shiftwidth' after lines that start a block:
36 " 'function', 'if', 'for', 'while', 'repeat', 'else', 'elseif', '{'
37 let ind = indent(prevlnum)
38 let prevline = getline(prevlnum)
39 let midx = match(prevline, '^\s*\%(if\>\|for\>\|while\>\|repeat\>\|else\>\|elseif\>\|do\>\|then\>\)')
41 let midx = match(prevline, '{\s*$')
43 let midx = match(prevline, '\<function\>\s*\%(\k\|[.:]\)\{-}\s*(')
48 " Add 'shiftwidth' if what we found previously is not in a comment and
49 " an "end" or "until" is not present on the same line.
50 if synIDattr(synID(prevlnum, midx + 1, 1), "name") != "luaComment" && prevline !~ '\<end\>\|\<until\>'
51 let ind = ind + &shiftwidth
55 " Subtract a 'shiftwidth' on end, else (and elseif), until and '}'
56 " This is the part that requires 'indentkeys'.
57 let midx = match(getline(v:lnum), '^\s*\%(end\|else\|until\|}\)')
58 if midx != -1 && synIDattr(synID(v:lnum, midx + 1, 1), "name") != "luaComment"
59 let ind = ind - &shiftwidth