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Change the README h1 to "Vim Markdown"
[etc/vim.git] / indent / mkd.vim
1 if exists("b:did_indent") | finish | endif
2 let b:did_indent = 1
3
4 setlocal indentexpr=GetMkdIndent()
5 setlocal nolisp
6 setlocal nosmartindent
7 setlocal autoindent
8
9 " Only define the function once
10 if exists("*GetMkdIndent") | finish | endif
11
12 function! s:is_li_start(line)
13     return a:line !~ '^ *\([*-]\)\%( *\1\)\{2}\%( \|\1\)*$' &&
14       \    a:line =~ '^\s*[*+-] \+'
15 endfunction
16
17 function! s:is_blank_line(line)
18     return a:line =~ '^$'
19 endfunction
20
21 function! s:prevnonblank(lnum)
22     let i = a:lnum
23     while i > 1 && s:is_blank_line(getline(i))
24         let i -= 1
25     endwhile
26     return i
27 endfunction
28
29 function GetMkdIndent()
30     let list_ind = 4
31     " Find a non-blank line above the current line.
32     let lnum = prevnonblank(v:lnum - 1)
33     " At the start of the file use zero indent.
34     if lnum == 0 | return 0 | endif
35     let ind = indent(lnum)
36     let line = getline(lnum)    " Last line
37     let cline = getline(v:lnum) " Current line
38     if s:is_li_start(cline) 
39         " Current line is the first line of a list item, do not change indent
40         return indent(v:lnum)
41     elseif s:is_li_start(line)
42         " Last line is the first line of a list item, increase indent
43         return ind + list_ind
44     else
45         return ind
46     endif
47 endfunction