+" vim: ts=4 sw=4:
" folding for Markdown headers, both styles (atx- and setex-)
" http://daringfireball.net/projects/markdown/syntax#header
"
if get(g:, "vim_markdown_folding_style_pythonic", 0)
function! Foldexpr_markdown(lnum)
let l1 = getline(a:lnum)
- " keep track of fenced code blocks
+ "~~~~~ keep track of fenced code blocks ~~~~~
+ "If we hit a code block fence
if l1 =~ '````*' || l1 =~ '\~\~\~\~*'
+ " toggle the variable that says if we're in a code block
if b:fenced_block == 0
let b:fenced_block = 1
elseif b:fenced_block == 1
let b:fenced_block = 0
endif
+ " else, if we're caring about front matter
+ elseif g:vim_markdown_frontmatter == 1
+ " if we're in front matter and not on line 1
+ if b:front_matter == 1 && a:lnum > 2
+ let l0 = getline(a:lnum-1)
+ " if the previous line fenced front matter
+ if l0 == '---'
+ " we must not be in front matter
+ let b:front_matter = 0
+ endif
+ " else, if we're on line one
+ elseif a:lnum == 1
+ " if we hit a front matter fence
+ if l1 == '---'
+ " we're in the front matter
+ let b:front_matter = 1
+ endif
+ endif
+ endif
+
+ " if we're in a code block or front matter
+ if b:fenced_block == 1 || b:front_matter == 1
+ if a:lnum == 1
+ " fold any 'preamble'
+ return '>1'
+ else
+ " keep previous foldlevel
+ return '='
+ endif
endif
let l2 = getline(a:lnum+1)
- if l2 =~ '^==\+\s*' && b:fenced_block == 0 && !s:is_mkdCode(a:lnum+1)
+ " if the next line starts with two or more '='
+ " and is not code
+ if l2 =~ '^==\+\s*' && !s:is_mkdCode(a:lnum+1)
" next line is underlined (level 1)
return '>0'
- elseif l2 =~ '^--\+\s*' && b:fenced_block == 0 && !s:is_mkdCode(a:lnum+1)
+ " else, if the nex line starts with two or more '-'
+ " and is not code
+ elseif l2 =~ '^--\+\s*' && !s:is_mkdCode(a:lnum+1)
" next line is underlined (level 2)
return '>1'
endif
- if l1 =~ '^#' && b:fenced_block == 0 && !s:is_mkdCode(a:lnum)
- " current line starts with hashes
- return '>'.(matchend(l1, '^#\+') - 1)
+ "if we're on a non-code line starting with a pound sign
+ if l1 =~ '^#' && !s:is_mkdCode(a:lnum)
+ " set the fold level to the number of hashes -1
+ " return '>'.(matchend(l1, '^#\+') - 1)
+ " set the fold level to the number of hashes
+ return '>'.(matchend(l1, '^#\+'))
+ " else, if we're on line 1
elseif a:lnum == 1
" fold any 'preamble'
return '>1'
let fillcharcount = windowwidth - len(line) - len(foldedlinecount) + 1
return line . ' ' . repeat("-", fillcharcount) . ' ' . foldedlinecount
endfunction
-else
+else " vim_markdown_folding_style_pythonic == 0
function! Foldexpr_markdown(lnum)
if (a:lnum == 1)
let l0 = ''
else
let l0 = getline(a:lnum-1)
endif
+
" keep track of fenced code blocks
if l0 =~ '````*' || l0 =~ '\~\~\~\~*'
if b:fenced_block == 0
elseif b:fenced_block == 1
let b:fenced_block = 0
endif
+ elseif g:vim_markdown_frontmatter == 1
+ if b:front_matter == 1
+ if l0 == '---'
+ let b:front_matter = 0
+ endif
+ elseif a:lnum == 2
+ if l0 == '---'
+ let b:front_matter = 1
+ endif
+ endif
+ endif
+
+ if b:fenced_block == 1 || b:front_matter == 1
+ " keep previous foldlevel
+ return '='
endif
let l2 = getline(a:lnum+1)
- if l2 =~ '^==\+\s*' && b:fenced_block == 0 && !s:is_mkdCode(a:lnum+1)
+ if l2 =~ '^==\+\s*' && !s:is_mkdCode(a:lnum+1)
" next line is underlined (level 1)
return '>1'
- elseif l2 =~ '^--\+\s*' && b:fenced_block == 0 && !s:is_mkdCode(a:lnum+1)
+ elseif l2 =~ '^--\+\s*' && !s:is_mkdCode(a:lnum+1)
" next line is underlined (level 2)
- if g:vim_markdown_folding_level >= 2
+ if s:vim_markdown_folding_level >= 2
return '>1'
else
return '>2'
endif
let l1 = getline(a:lnum)
- if l1 =~ '^#' && b:fenced_block == 0 && !s:is_mkdCode(a:lnum)
+ if l1 =~ '^#' && !s:is_mkdCode(a:lnum)
" fold level according to option
- let l:level = matchend(l1, '^#\+')
- if g:vim_markdown_folding_level == 1 || l:level > g:vim_markdown_folding_level
- return -1
+ if s:vim_markdown_folding_level == 1 || matchend(l1, '^#\+') > s:vim_markdown_folding_level
+ if a:lnum == line('$')
+ return matchend(l1, '^#\+') - 1
+ else
+ return -1
+ endif
else
" headers are not folded
return 0
endif
endif
- if l0 =~ '^#' && b:fenced_block == 0 && !s:is_mkdCode(a:lnum-1)
- " current line starts with hashes
+ if l0 =~ '^#' && !s:is_mkdCode(a:lnum-1)
+ " previous line starts with hashes
return '>'.matchend(l0, '^#\+')
else
- " fold here because of setext headers
+ " keep previous foldlevel
return '='
endif
endfunction
let b:fenced_block = 0
-let g:vim_markdown_folding_level = get(g:, "vim_markdown_folding_level", 1)
+let b:front_matter = 0
+let s:vim_markdown_folding_level = get(g:, "vim_markdown_folding_level", 1)
-if !get(g:, "vim_markdown_folding_disabled", 0)
- setlocal foldexpr=Foldexpr_markdown(v:lnum)
- setlocal foldmethod=expr
+function! s:MarkdownSetupFolding()
+ if !get(g:, "vim_markdown_folding_disabled", 0)
+ if get(g:, "vim_markdown_folding_style_pythonic", 0)
+ if get(g:, "vim_markdown_override_foldtext", 1)
+ setlocal foldtext=Foldtext_markdown()
+ endif
+ endif
+ setlocal foldexpr=Foldexpr_markdown(v:lnum)
+ setlocal foldmethod=expr
+ endif
+endfunction
+
+function! s:MarkdownSetupFoldLevel()
if get(g:, "vim_markdown_folding_style_pythonic", 0)
- setlocal foldtext=Foldtext_markdown()
+ " set default foldlevel
+ execute "setlocal foldlevel=".s:vim_markdown_folding_level
endif
-endif
+endfunction
+
+call s:MarkdownSetupFoldLevel()
+call s:MarkdownSetupFolding()
+
+augroup Mkd
+ " These autocmds need to be kept in sync with the autocmds calling
+ " s:MarkdownRefreshSyntax in ftplugin/markdown.vim.
+ autocmd BufWinEnter,BufWritePost <buffer> call s:MarkdownSetupFolding()
+ autocmd InsertEnter,InsertLeave <buffer> call s:MarkdownSetupFolding()
+ autocmd CursorHold,CursorHoldI <buffer> call s:MarkdownSetupFolding()
+augroup END
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