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Diffstat (limited to 'after/ftplugin/markdown.vim')
| -rw-r--r-- | after/ftplugin/markdown.vim | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/after/ftplugin/markdown.vim b/after/ftplugin/markdown.vim new file mode 100644 index 00000000..1d1e410c --- /dev/null +++ b/after/ftplugin/markdown.vim @@ -0,0 +1,205 @@ +if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'markdown') == -1 + +" vim: ts=4 sw=4: +" folding for Markdown headers, both styles (atx- and setex-) +" http://daringfireball.net/projects/markdown/syntax#header +" +" this code can be placed in file +" $HOME/.vim/after/ftplugin/markdown.vim +" +" original version from Steve Losh's gist: https://gist.github.com/1038710 + +function! s:is_mkdCode(lnum) + let name = synIDattr(synID(a:lnum, 1, 0), 'name') + return (name =~ '^mkd\%(Code$\|Snippet\)' || name != '' && name !~ '^\%(mkd\|html\)') +endfunction + +if get(g:, "vim_markdown_folding_style_pythonic", 0) + function! Foldexpr_markdown(lnum) + let l1 = getline(a:lnum) + "~~~~~ 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 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' + " 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 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' + else + " keep previous foldlevel + return '=' + endif + endfunction + + function! Foldtext_markdown() + let line = getline(v:foldstart) + let has_numbers = &number || &relativenumber + let nucolwidth = &fdc + has_numbers * &numberwidth + let windowwidth = winwidth(0) - nucolwidth - 6 + let foldedlinecount = v:foldend - v:foldstart + let line = strpart(line, 0, windowwidth - 2 -len(foldedlinecount)) + let line = substitute(line, '\%("""\|''''''\)', '', '') + let fillcharcount = windowwidth - len(line) - len(foldedlinecount) + 1 + return line . ' ' . repeat("-", fillcharcount) . ' ' . foldedlinecount + endfunction +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 + let b:fenced_block = 1 + 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*' && !s:is_mkdCode(a:lnum+1) + " next line is underlined (level 1) + return '>1' + elseif l2 =~ '^--\+\s*' && !s:is_mkdCode(a:lnum+1) + " next line is underlined (level 2) + if s:vim_markdown_folding_level >= 2 + return '>1' + else + return '>2' + endif + endif + + let l1 = getline(a:lnum) + if l1 =~ '^#' && !s:is_mkdCode(a:lnum) + " fold level according to option + 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 =~ '^#' && !s:is_mkdCode(a:lnum-1) + " previous line starts with hashes + return '>'.matchend(l0, '^#\+') + else + " keep previous foldlevel + return '=' + endif + endfunction +endif + + +let b:fenced_block = 0 +let b:front_matter = 0 +let s:vim_markdown_folding_level = get(g:, "vim_markdown_folding_level", 1) + +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) + " set default foldlevel + execute "setlocal foldlevel=".s:vim_markdown_folding_level + 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 + +endif |