syn sync linebreaks=1
"additions to HTML groups
-syn region htmlBold start=/\\\@<!\(^\|\A\)\@=\*\@<!\*\*\*\@!/ end=/\\\@<!\*\@<!\*\*\*\@!\($\|\A\)\@=/ contains=@Spell,htmlItalic
-syn region htmlItalic start=/\\\@<!\(^\|\A\)\@=\*\@<!\*\*\@!/ end=/\\\@<!\*\@<!\*\*\@!\($\|\A\)\@=/ contains=htmlBold,@Spell
-syn region htmlBold start=/\\\@<!\(^\|\A\)\@=_\@<!___\@!/ end=/\\\@<!_\@<!___\@!\($\|\A\)\@=/ contains=htmlItalic,@Spell
-syn region htmlItalic start=/\\\@<!\(^\|\A\)\@=_\@<!__\@!/ end=/\\\@<!_\@<!__\@!\($\|\A\)\@=/ contains=htmlBold,@Spell
+syn region htmlItalic start="\\\@<!\*\S\@=" end="\S\@<=\\\@<!\*" keepend oneline
+syn region htmlItalic start="\(^\|\s\)\@<=_\|\\\@<!_\([^_]\+\s\)\@=" end="\S\@<=_\|_\S\@=" keepend oneline
+syn region htmlBold start="\S\@<=\*\*\|\*\*\S\@=" end="\S\@<=\*\*\|\*\*\S\@=" keepend oneline
+syn region htmlBold start="\S\@<=__\|__\S\@=" end="\S\@<=__\|__\S\@=" keepend oneline
+syn region htmlBoldItalic start="\S\@<=\*\*\*\|\*\*\*\S\@=" end="\S\@<=\*\*\*\|\*\*\*\S\@=" keepend oneline
+syn region htmlBoldItalic start="\S\@<=___\|___\S\@=" end="\S\@<=___\|___\S\@=" keepend oneline
" [link](URL) | [link][id] | [link][]
syn region mkdFootnotes matchgroup=mkdDelimiter start="\[^" end="\]"
-syn region mkdLink matchgroup=mkdDelimiter start="[^\\]\!\?\[" end="\]\ze\s*[[(]" contains=@Spell nextgroup=mkdURL,mkdID skipwhite
-syn region mkdID matchgroup=mkdDelimiter start="\[" end="\]" contained
-syn region mkdURL matchgroup=mkdDelimiter start="(" end=")" contained
+syn region mkdID matchgroup=mkdDelimiter start="\[" end="\]" contained oneline
+syn region mkdURL matchgroup=mkdDelimiter start="(" end=")" contained oneline
+syn region mkdLink matchgroup=mkdDelimiter start="\\\@<!\[" end="\]\ze\s*[[(]" contains=@Spell nextgroup=mkdURL,mkdID skipwhite oneline
" mkd inline links: protocol optional user:pass@ sub/domain .com, .co.uk, etc optional port path/querystring/hash fragment
" ------------ _____________________ --------------------------- ________________________ ----------------- __
syntax match mkdInlineURL /https\?:\/\/\(\w\+\(:\w\+\)\?@\)\?\([A-Za-z][-_0-9A-Za-z]*\.\)\{1,}\(\w\{2,}\.\?\)\{1,}\(:[0-9]\{1,5}\)\?\S*/
"define Markdown groups
syn match mkdLineContinue ".$" contained
-syn match mkdRule /^\s*\*\s\{0,1}\*\s\{0,1}\*$/
-syn match mkdRule /^\s*-\s\{0,1}-\s\{0,1}-$/
-syn match mkdRule /^\s*_\s\{0,1}_\s\{0,1}_$/
-syn match mkdRule /^\s*-\{3,}$/
-syn match mkdRule /^\s*\*\{3,5}$/
-syn match mkdListItem "^\s*[-*+]\s\+"
-syn match mkdListItem "^\s*\d\+\.\s\+"
-syn match mkdCode /^\s*\n\(\(\s\{4,}[^ ]\|\t\+[^\t]\).*\n\)\+/
-syn match mkdLineBreak / \+$/
-syn region mkdCode start=/\\\@<!`/ end=/\\\@<!`/
-syn region mkdCode start=/\s*``[^`]*/ end=/[^`]*``\s*/
-syn region mkdCode start=/^```\s*\w*\s*$/ end=/^```\s*$/
-syn region mkdBlockquote start=/^\s*>/ end=/$/ contains=mkdLineBreak,mkdLineContinue,@Spell
-syn region mkdCode start="<pre[^>]*>" end="</pre>"
-syn region mkdCode start="<code[^>]*>" end="</code>"
+syn match mkdLineBreak / \+$/
+syn region mkdBlockquote start=/^\s*>/ end=/$/ contains=mkdLineBreak,mkdLineContinue,@Spell
+syn region mkdCode start=/\(\([^\\]\|^\)\\\)\@<!`/ end=/\(\([^\\]\|^\)\\\)\@<!`/
+syn region mkdCode start=/\s*``[^`]*/ end=/[^`]*``\s*/
+syn region mkdCode start=/^```\s*[0-9A-Za-z_-]*\s*$/ end=/^```\s*$/
+syn region mkdCode start="<pre[^>]*>" end="</pre>"
+syn region mkdCode start="<code[^>]*>" end="</code>"
+syn region mkdFootnote start="\[^" end="\]"
+syn match mkdCode /^\s*\n\(\(\s\{8,}[^ ]\|\t\t\+[^\t]\).*\n\)\+/
+syn match mkdIndentCode /^\s*\n\(\(\s\{4,}[^ ]\|\t\+[^\t]\).*\n\)\+/ contained
+syn match mkdListItem "^\s*[-*+]\s\+"
+syn match mkdListItem "^\s*\d\+\.\s\+"
+syn region mkdNonListItemBlock start="\n\(\_^\_$\|\s\{4,}[^ ]\|\t+[^\t]\)\@!" end="^\(\s*\([-*+]\|\d\+\.\)\s\+\)\@=" contains=@mkdNonListItem
+syn match mkdRule /^\s*\*\s\{0,1}\*\s\{0,1}\*$/
+syn match mkdRule /^\s*-\s\{0,1}-\s\{0,1}-$/
+syn match mkdRule /^\s*_\s\{0,1}_\s\{0,1}_$/
+syn match mkdRule /^\s*-\{3,}$/
+syn match mkdRule /^\s*\*\{3,5}$/
"HTML headings
syn region htmlH1 start="^\s*#" end="\($\|#\+\)" contains=@Spell
syn match htmlH1 /^.\+\n=\+$/ contains=@Spell
syn match htmlH2 /^.\+\n-\+$/ contains=@Spell
-
-
-" fold region for headings
-syn region mkdHeaderFold
- \ start="^\s*\z(#\+\)"
- \ skip="^\s*\z1#\+"
- \ end="^\(\s*#\)\@="
- \ fold contains=TOP
-
-" fold region for lists
-syn region mkdListFold
- \ start="^\z(\s*\)\*\z(\s*\)"
- \ skip="^\z1 \z2\s*[^#]"
- \ end="^\(.\)\@="
- \ fold contains=TOP
-
-syn sync fromstart
-setlocal foldmethod=syntax
-
-
+syn cluster mkdNonListItem contains=htmlItalic,htmlBold,htmlBoldItalic,mkdFootnotes,mkdID,mkdURL,mkdLink,mkdLinkDef,mkdLineBreak,mkdBlockquote,mkdCode,mkdIndentCode,mkdListItem,mkdRule,htmlH1,htmlH2,htmlH3,htmlH4,htmlH5,htmlH6
"highlighting for Markdown groups
HtmlHiLink mkdString String
HtmlHiLink mkdCode String
+HtmlHiLink mkdIndentCode String
+HtmlHiLink mkdFootnote Comment
HtmlHiLink mkdBlockquote Comment
HtmlHiLink mkdLineContinue Comment
HtmlHiLink mkdListItem Identifier
HtmlHiLink mkdDelimiter Delimiter
+" Automatically insert bullets
+setlocal formatoptions+=r
+" Accept various markers as bullets
+setlocal comments=b:*,b:+,b:-
+
let b:current_syntax = "mkd"
delcommand HtmlHiLink