Squashed '.vim/bundle/vim-markdown/' changes from da5a7ac9..8f6cb3a6

[etc/vim.git] / ftplugin / markdown.vim

diff --git a/ftplugin/markdown.vim b/ftplugin/markdown.vim
index 74bbc541c0c28a3d19208b95ce06a41941fed8c2..33ed3cc96a1e59280caa4f2319048dd731f39bf4 100644 (file)
--- a/ftplugin/markdown.vim
+++ b/ftplugin/markdown.vim
@@ -1,6 +1,6 @@
 "TODO print messages when on visual mode. I only see VISUAL, not the messages.
 
 "TODO print messages when on visual mode. I only see VISUAL, not the messages.
 

-" Function interface phylosophy:
+" Function interface philosophy:

 "
 " - functions take arbitrary line numbers as parameters.
 "    Current cursor line is only a suitable default parameter.
 "
 " - functions take arbitrary line numbers as parameters.
 "    Current cursor line is only a suitable default parameter.


@@ -56,7 +56,7 @@ let s:levelRegexpDict = {
     \ 6: '\v^######[^#]@='
 \ }
 
     \ 6: '\v^######[^#]@='
 \ }
 

-" Maches any header level of any type.
+" Matches any header level of any type.

 "
 " This could be deduced from `s:levelRegexpDict`, but it is more
 " efficient to have a single regexp for this.
 "
 " This could be deduced from `s:levelRegexpDict`, but it is more
 " efficient to have a single regexp for this.


@@ -94,7 +94,7 @@ endfunction
 "
 function! s:MoveToCurHeader()
     let l:lineNum = s:GetHeaderLineNum()
 "
 function! s:MoveToCurHeader()
     let l:lineNum = s:GetHeaderLineNum()

-    if l:lineNum != 0
+    if l:lineNum !=# 0

         call cursor(l:lineNum, 1)
     else
         echo 'outside any header'
         call cursor(l:lineNum, 1)
     else
         echo 'outside any header'


@@ -147,13 +147,68 @@ function! s:GetHeaderLevel(...)
         let l:line = a:1
     endif
     let l:linenum = s:GetHeaderLineNum(l:line)
         let l:line = a:1
     endif
     let l:linenum = s:GetHeaderLineNum(l:line)

-    if l:linenum != 0
+    if l:linenum !=# 0

         return s:GetLevelOfHeaderAtLine(l:linenum)
     else
         return 0
     endif
 endfunction
 
         return s:GetLevelOfHeaderAtLine(l:linenum)
     else
         return 0
     endif
 endfunction
 

+" Return list of headers and their levels.
+"
+function! s:GetHeaderList()
+    let l:bufnr = bufnr('%')
+    let l:fenced_block = 0
+    let l:front_matter = 0
+    let l:header_list = []
+    let l:vim_markdown_frontmatter = get(g:, 'vim_markdown_frontmatter', 0)
+    let l:fence_str = ''
+    for i in range(1, line('$'))
+        let l:lineraw = getline(i)
+        let l:l1 = getline(i+1)
+        let l:line = substitute(l:lineraw, '#', "\\\#", 'g')
+        " exclude lines in fenced code blocks
+        if l:line =~# '\v^[[:space:]>]*(`{3,}|\~{3,})\s*(\w+)?\s*$'
+            if l:fenced_block == 0
+                let l:fenced_block = 1
+                let l:fence_str = matchstr(l:line, '\v(`{3,}|\~{3,})')
+            elseif l:fenced_block == 1 && matchstr(l:line, '\v(`{3,}|\~{3,})') ==# l:fence_str
+                let l:fenced_block = 0
+                let l:fence_str = ''
+            endif
+        " exclude lines in frontmatters
+        elseif l:vim_markdown_frontmatter == 1
+            if l:front_matter == 1
+                if l:line ==# '---'
+                    let l:front_matter = 0
+                endif
+            elseif i == 1
+                if l:line ==# '---'
+                    let l:front_matter = 1
+                endif
+            endif
+        endif
+        " match line against header regex
+        if join(getline(i, i + 1), "\n") =~# s:headersRegexp && l:line =~# '^\S'
+            let l:is_header = 1
+        else
+            let l:is_header = 0
+        endif
+        if l:is_header ==# 1 && l:fenced_block ==# 0 && l:front_matter ==# 0
+            " remove hashes from atx headers
+            if match(l:line, '^#') > -1
+                let l:line = substitute(l:line, '\v^#*[ ]*', '', '')
+                let l:line = substitute(l:line, '\v[ ]*#*$', '', '')
+            endif
+            " append line to list
+            let l:level = s:GetHeaderLevel(i)
+            let l:item = {'level': l:level, 'text': l:line, 'lnum': i, 'bufnr': bufnr}
+            let l:header_list = l:header_list + [l:item]
+        endif
+    endfor
+    return l:header_list
+endfunction
+

 " Returns the level of the header at the given line.
 "
 " If there is no header at the given line, returns `0`.
 " Returns the level of the header at the given line.
 "
 " If there is no header at the given line, returns `0`.


@@ -175,6 +230,7 @@ endfunction
 function! s:MoveToParentHeader()
     let l:linenum = s:GetParentHeaderLineNumber()
     if l:linenum != 0
 function! s:MoveToParentHeader()
     let l:linenum = s:GetParentHeaderLineNumber()
     if l:linenum != 0

+        call setpos("''", getpos('.'))

         call cursor(l:linenum, 1)
     else
         echo 'no parent header'
         call cursor(l:linenum, 1)
     else
         echo 'no parent header'


@@ -302,18 +358,51 @@ function! s:Toc(...)
         let l:window_type = 'vertical'
     endif
 
         let l:window_type = 'vertical'
     endif
 

-    try
-        silent lvimgrep /\(^\S.*\(\n[=-]\+\n\)\@=\|^#\+\)/ %
-    catch /E480/
-        echom "Toc: No headers."
+
+    let l:cursor_line = line('.')
+    let l:cursor_header = 0
+    let l:header_list = s:GetHeaderList()
+    let l:indented_header_list = []
+    if len(l:header_list) == 0
+        echom 'Toc: No headers.'

         return
         return

-    endtry
+    endif
+    let l:header_max_len = 0
+    let l:vim_markdown_toc_autofit = get(g:, 'vim_markdown_toc_autofit', 0)
+    for h in l:header_list
+        " set header number of the cursor position
+        if l:cursor_header == 0
+            let l:header_line = h.lnum
+            if l:header_line == l:cursor_line
+                let l:cursor_header = index(l:header_list, h) + 1
+            elseif l:header_line > l:cursor_line
+                let l:cursor_header = index(l:header_list, h)
+            endif
+        endif
+        " indent header based on level
+        let l:text = repeat('  ', h.level-1) . h.text
+        " keep track of the longest header size (heading level + title)
+        let l:total_len = strdisplaywidth(l:text)
+        if l:total_len > l:header_max_len
+            let l:header_max_len = l:total_len
+        endif
+        " append indented line to list
+        let l:item = {'lnum': h.lnum, 'text': l:text, 'valid': 1, 'bufnr': h.bufnr, 'col': 1}
+        let l:indented_header_list = l:indented_header_list + [l:item]
+    endfor
+    call setloclist(0, l:indented_header_list)

 
     if l:window_type ==# 'horizontal'
         lopen
     elseif l:window_type ==# 'vertical'
         vertical lopen
 
     if l:window_type ==# 'horizontal'
         lopen
     elseif l:window_type ==# 'vertical'
         vertical lopen

-        let &winwidth=(&columns/2)
+        " auto-fit toc window when possible to shrink it
+        if (&columns/2) > l:header_max_len && l:vim_markdown_toc_autofit == 1
+            " header_max_len + 1 space for first header + 3 spaces for line numbers
+            execute 'vertical resize ' . (l:header_max_len + 1 + 3)
+        else
+            execute 'vertical resize ' . (&columns/2)
+        endif

     elseif l:window_type ==# 'tab'
         tab lopen
     else
     elseif l:window_type ==# 'tab'
         tab lopen
     else


@@ -323,25 +412,82 @@ function! s:Toc(...)
     for i in range(1, line('$'))
         " this is the location-list data for the current item
         let d = getloclist(0)[i-1]
     for i in range(1, line('$'))
         " this is the location-list data for the current item
         let d = getloclist(0)[i-1]

-        " atx headers
-        if match(d.text, "^#") > -1
-            let l:level = len(matchstr(d.text, '#*', 'g'))-1
-            let d.text = substitute(d.text, '\v^#*[ ]*', '', '')
-            let d.text = substitute(d.text, '\v[ ]*#*$', '', '')
-        " setex headers
-        else
-            let l:next_line = getbufline(d.bufnr, d.lnum+1)
-            if match(l:next_line, "=") > -1
-                let l:level = 0
-            elseif match(l:next_line, "-") > -1
-                let l:level = 1
-            endif
-        endif
-        call setline(i, repeat('  ', l:level). d.text)
+        call setline(i, d.text)

     endfor
     setlocal nomodified
     setlocal nomodifiable
     endfor
     setlocal nomodified
     setlocal nomodifiable

-    normal! gg
+    execute 'normal! ' . l:cursor_header . 'G'
+endfunction
+
+function! s:InsertToc(format, ...)
+    if a:0 > 0
+        if type(a:1) != type(0)
+            echohl WarningMsg
+            echomsg '[vim-markdown] Invalid argument, must be an integer >= 2.'
+            echohl None
+            return
+        endif
+        let l:max_level = a:1
+        if l:max_level < 2
+            echohl WarningMsg
+            echomsg '[vim-markdown] Maximum level cannot be smaller than 2.'
+            echohl None
+            return
+        endif
+    else
+        let l:max_level = 0
+    endif
+
+    let l:toc = []
+    let l:header_list = s:GetHeaderList()
+    if len(l:header_list) == 0
+        echom 'InsertToc: No headers.'
+        return
+    endif
+
+    if a:format ==# 'numbers'
+        let l:h2_count = 0
+        for header in l:header_list
+            if header.level == 2
+                let l:h2_count += 1
+            endif
+        endfor
+        let l:max_h2_number_len = strlen(string(l:h2_count))
+    else
+        let l:max_h2_number_len = 0
+    endif
+
+    let l:h2_count = 0
+    for header in l:header_list
+        let l:level = header.level
+        if l:level == 1
+            " skip level-1 headers
+            continue
+        elseif l:max_level != 0 && l:level > l:max_level
+            " skip unwanted levels
+            continue
+        elseif l:level == 2
+            " list of level-2 headers can be bullets or numbers
+            if a:format ==# 'bullets'
+                let l:indent = ''
+                let l:marker = '* '
+            else
+                let l:h2_count += 1
+                let l:number_len = strlen(string(l:h2_count))
+                let l:indent = repeat(' ', l:max_h2_number_len - l:number_len)
+                let l:marker = l:h2_count . '. '
+            endif
+        else
+            let l:indent = repeat(' ', l:max_h2_number_len + 2 * (l:level - 2))
+            let l:marker = '* '
+        endif
+        let l:text = '[' . header.text . ']'
+        let l:link = '(#' . substitute(tolower(header.text), '\v[ ]+', '-', 'g') . ')'
+        let l:line = l:indent . l:marker . l:text . l:link
+        let l:toc = l:toc + [l:line]
+    endfor
+
+    call append(line('.'), l:toc)

 endfunction
 
 " Convert Setex headers in range `line1 .. line2` to Atx.
 endfunction
 
 " Convert Setex headers in range `line1 .. line2` to Atx.


@@ -351,7 +497,9 @@ endfunction
 function! s:SetexToAtx(line1, line2)
     let l:originalNumLines = line('$')
     execute 'silent! ' . a:line1 . ',' . a:line2 . 'substitute/\v(.*\S.*)\n\=+$/# \1/'
 function! s:SetexToAtx(line1, line2)
     let l:originalNumLines = line('$')
     execute 'silent! ' . a:line1 . ',' . a:line2 . 'substitute/\v(.*\S.*)\n\=+$/# \1/'

-    execute 'silent! ' . a:line1 . ',' . a:line2 . 'substitute/\v(.*\S.*)\n-+$/## \1/'
+
+    let l:changed = l:originalNumLines - line('$')
+    execute 'silent! ' . a:line1 . ',' . (a:line2 - l:changed) . 'substitute/\v(.*\S.*)\n-+$/## \1'

     return l:originalNumLines - line('$')
 endfunction
 
     return l:originalNumLines - line('$')
 endfunction
 


@@ -393,16 +541,34 @@ endfunction
 "
 function! s:TableFormat()
     let l:pos = getpos('.')
 "
 function! s:TableFormat()
     let l:pos = getpos('.')

+
+    if get(g:, 'vim_markdown_borderless_table', 0)
+      " add `|` to the beginning of the line if it isn't present
+      normal! {
+      call search('|')
+      execute 'silent .,''}s/\v^(\s{0,})\|?([^\|])/\1|\2/e'
+
+      " add `|` to the end of the line if it isn't present
+      normal! {
+      call search('|')
+      execute 'silent .,''}s/\v([^\|])\|?(\s{0,})$/\1|\2/e'
+    endif
+

     normal! {
     " Search instead of `normal! j` because of the table at beginning of file edge case.
     call search('|')
     normal! j
     normal! {
     " Search instead of `normal! j` because of the table at beginning of file edge case.
     call search('|')
     normal! j

-    " Remove everything that is not a pipe othewise well formated tables would grow
-    " because of addition of 2 spaces on the separator line by Tabularize /|.
+    " Remove everything that is not a pipe, colon or hyphen next to a colon othewise
+    " well formated tables would grow because of addition of 2 spaces on the separator
+    " line by Tabularize /|.

     let l:flags = (&gdefault ? '' : 'g')
     let l:flags = (&gdefault ? '' : 'g')

-    execute 's/[^|]//' . l:flags
-    Tabularize /|
-    execute 's/ /-/' . l:flags
+    execute 's/\(:\@<!-:\@!\|[^|:-]\)//e' . l:flags
+    execute 's/--/-/e' . l:flags
+    Tabularize /\(\\\)\@<!|
+    " Move colons for alignment to left or right side of the cell.
+    execute 's/:\( \+\)|/\1:|/e' . l:flags
+    execute 's/|\( \+\):/|:\1/e' . l:flags
+    execute 's/|:\?\zs[ -]\+\ze:\?|/\=repeat("-", len(submatch(0)))/' . l:flags

     call setpos('.', l:pos)
 endfunction
 
     call setpos('.', l:pos)
 endfunction
 


@@ -505,13 +671,78 @@ endfunction
 "
 function! s:OpenUrlUnderCursor()
     let l:url = s:Markdown_GetUrlForPosition(line('.'), col('.'))
 "
 function! s:OpenUrlUnderCursor()
     let l:url = s:Markdown_GetUrlForPosition(line('.'), col('.'))

-    if l:url != ''
-        call s:VersionAwareNetrwBrowseX(l:url)
+    if l:url !=# ''
+      if l:url =~? 'http[s]\?:\/\/[[:alnum:]%\/_#.-]*'
+        "Do nothing
+      else
+        let l:url = expand(expand('%:h').'/'.l:url)
+      endif
+      call s:VersionAwareNetrwBrowseX(l:url)

     else
         echomsg 'The cursor is not on a link.'
     endif
 endfunction
 
     else
         echomsg 'The cursor is not on a link.'
     endif
 endfunction
 

+" We need a definition guard because we invoke 'edit' which will reload this
+" script while this function is running. We must not replace it.
+if !exists('*s:EditUrlUnderCursor')
+    function s:EditUrlUnderCursor()
+        let l:editmethod = ''
+        " determine how to open the linked file (split, tab, etc)
+        if exists('g:vim_markdown_edit_url_in')
+          if g:vim_markdown_edit_url_in ==# 'tab'
+            let l:editmethod = 'tabnew'
+          elseif g:vim_markdown_edit_url_in ==# 'vsplit'
+            let l:editmethod = 'vsp'
+          elseif g:vim_markdown_edit_url_in ==# 'hsplit'
+            let l:editmethod = 'sp'
+          else
+            let l:editmethod = 'edit'
+          endif
+        else
+          " default to current buffer
+          let l:editmethod = 'edit'
+        endif
+        let l:url = s:Markdown_GetUrlForPosition(line('.'), col('.'))
+        if l:url !=# ''
+            if get(g:, 'vim_markdown_autowrite', 0)
+                write
+            endif
+            let l:anchor = ''
+            if get(g:, 'vim_markdown_follow_anchor', 0)
+                let l:parts = split(l:url, '#', 1)
+                if len(l:parts) == 2
+                    let [l:url, l:anchor] = parts
+                    let l:anchorexpr = get(g:, 'vim_markdown_anchorexpr', '')
+                    if l:anchorexpr !=# ''
+                        let l:anchor = eval(substitute(
+                            \ l:anchorexpr, 'v:anchor',
+                            \ escape('"'.l:anchor.'"', '"'), ''))
+                    endif
+                endif
+            endif
+            if l:url !=# ''
+                let l:ext = ''
+                if get(g:, 'vim_markdown_no_extensions_in_markdown', 0)
+                    " use another file extension if preferred
+                    if exists('g:vim_markdown_auto_extension_ext')
+                        let l:ext = '.'.g:vim_markdown_auto_extension_ext
+                    else
+                        let l:ext = '.md'
+                    endif
+                endif
+                let l:url = fnameescape(fnamemodify(expand('%:h').'/'.l:url.l:ext, ':.'))
+                execute l:editmethod l:url
+            endif
+            if l:anchor !=# ''
+                call search(l:anchor, 's')
+            endif
+        else
+            execute l:editmethod . ' <cfile>'
+        endif
+    endfunction
+endif
+

 function! s:VersionAwareNetrwBrowseX(url)
     if has('patch-7.4.567')
         call netrw#BrowseX(a:url, 0)
 function! s:VersionAwareNetrwBrowseX(url)
     if has('patch-7.4.567')
         call netrw#BrowseX(a:url, 0)


@@ -534,6 +765,7 @@ call <sid>MapNormVis('<Plug>Markdown_MoveToPreviousSiblingHeader', '<sid>MoveToP
 call <sid>MapNormVis('<Plug>Markdown_MoveToParentHeader', '<sid>MoveToParentHeader')
 call <sid>MapNormVis('<Plug>Markdown_MoveToCurHeader', '<sid>MoveToCurHeader')
 nnoremap <Plug>Markdown_OpenUrlUnderCursor :call <sid>OpenUrlUnderCursor()<cr>
 call <sid>MapNormVis('<Plug>Markdown_MoveToParentHeader', '<sid>MoveToParentHeader')
 call <sid>MapNormVis('<Plug>Markdown_MoveToCurHeader', '<sid>MoveToCurHeader')
 nnoremap <Plug>Markdown_OpenUrlUnderCursor :call <sid>OpenUrlUnderCursor()<cr>

+nnoremap <Plug>Markdown_EditUrlUnderCursor :call <sid>EditUrlUnderCursor()<cr>

 
 if !get(g:, 'vim_markdown_no_default_key_mappings', 0)
     call <sid>MapNotHasmapto(']]', 'Markdown_MoveToNextHeader')
 
 if !get(g:, 'vim_markdown_no_default_key_mappings', 0)
     call <sid>MapNotHasmapto(']]', 'Markdown_MoveToNextHeader')


@@ -541,31 +773,54 @@ if !get(g:, 'vim_markdown_no_default_key_mappings', 0)
     call <sid>MapNotHasmapto('][', 'Markdown_MoveToNextSiblingHeader')
     call <sid>MapNotHasmapto('[]', 'Markdown_MoveToPreviousSiblingHeader')
     call <sid>MapNotHasmapto(']u', 'Markdown_MoveToParentHeader')
     call <sid>MapNotHasmapto('][', 'Markdown_MoveToNextSiblingHeader')
     call <sid>MapNotHasmapto('[]', 'Markdown_MoveToPreviousSiblingHeader')
     call <sid>MapNotHasmapto(']u', 'Markdown_MoveToParentHeader')

-    call <sid>MapNotHasmapto(']c', 'Markdown_MoveToCurHeader')
+    call <sid>MapNotHasmapto(']h', 'Markdown_MoveToCurHeader')

     call <sid>MapNotHasmapto('gx', 'Markdown_OpenUrlUnderCursor')
     call <sid>MapNotHasmapto('gx', 'Markdown_OpenUrlUnderCursor')

+    call <sid>MapNotHasmapto('ge', 'Markdown_EditUrlUnderCursor')

 endif
 
 command! -buffer -range=% HeaderDecrease call s:HeaderDecrease(<line1>, <line2>)
 command! -buffer -range=% HeaderIncrease call s:HeaderDecrease(<line1>, <line2>, 1)
 command! -buffer -range=% SetexToAtx call s:SetexToAtx(<line1>, <line2>)
 endif
 
 command! -buffer -range=% HeaderDecrease call s:HeaderDecrease(<line1>, <line2>)
 command! -buffer -range=% HeaderIncrease call s:HeaderDecrease(<line1>, <line2>, 1)
 command! -buffer -range=% SetexToAtx call s:SetexToAtx(<line1>, <line2>)

-command! -buffer TableFormat call s:TableFormat()
+command! -buffer -range TableFormat call s:TableFormat()

 command! -buffer Toc call s:Toc()
 command! -buffer Toch call s:Toc('horizontal')
 command! -buffer Tocv call s:Toc('vertical')
 command! -buffer Toct call s:Toc('tab')
 command! -buffer Toc call s:Toc()
 command! -buffer Toch call s:Toc('horizontal')
 command! -buffer Tocv call s:Toc('vertical')
 command! -buffer Toct call s:Toc('tab')

+command! -buffer -nargs=? InsertToc call s:InsertToc('bullets', <args>)
+command! -buffer -nargs=? InsertNToc call s:InsertToc('numbers', <args>)

 
 " Heavily based on vim-notes - http://peterodding.com/code/vim/notes/
 
 " Heavily based on vim-notes - http://peterodding.com/code/vim/notes/

-function! s:Markdown_highlight_sources(force)
+if exists('g:vim_markdown_fenced_languages')
+    let s:filetype_dict = {}
+    for s:filetype in g:vim_markdown_fenced_languages
+        let key = matchstr(s:filetype, '[^=]*')
+        let val = matchstr(s:filetype, '[^=]*$')
+        let s:filetype_dict[key] = val
+    endfor
+else
+    let s:filetype_dict = {
+        \ 'c++': 'cpp',
+        \ 'viml': 'vim',
+        \ 'bash': 'sh',
+        \ 'ini': 'dosini'
+    \ }
+endif
+
+function! s:MarkdownHighlightSources(force)

     " Syntax highlight source code embedded in notes.
     " Look for code blocks in the current file
     let filetypes = {}
     for line in getline(1, '$')
     " Syntax highlight source code embedded in notes.
     " Look for code blocks in the current file
     let filetypes = {}
     for line in getline(1, '$')

-        let ft = matchstr(line, '```\zs\w*\>')
-        if !empty(ft) && ft !~ '^\d*$' | let filetypes[ft] = 1 | endif
+        let ft = matchstr(line, '\(`\{3,}\|\~\{3,}\)\s*\zs[0-9A-Za-z_+-]*\ze.*')
+        if !empty(ft) && ft !~# '^\d*$' | let filetypes[ft] = 1 | endif

     endfor
     if !exists('b:mkd_known_filetypes')
         let b:mkd_known_filetypes = {}
     endif
     endfor
     if !exists('b:mkd_known_filetypes')
         let b:mkd_known_filetypes = {}
     endif

+    if !exists('b:mkd_included_filetypes')
+        " set syntax file name included
+        let b:mkd_included_filetypes = {}
+    endif

     if !a:force && (b:mkd_known_filetypes == filetypes || empty(filetypes))
         return
     endif
     if !a:force && (b:mkd_known_filetypes == filetypes || empty(filetypes))
         return
     endif


@@ -575,11 +830,22 @@ function! s:Markdown_highlight_sources(force)
     let endgroup = 'mkdCodeEnd'
     for ft in keys(filetypes)
         if a:force || !has_key(b:mkd_known_filetypes, ft)
     let endgroup = 'mkdCodeEnd'
     for ft in keys(filetypes)
         if a:force || !has_key(b:mkd_known_filetypes, ft)

-
-            let group = 'mkdSnippet' . toupper(ft)
-            let include = s:syntax_include(ft)
-            let command = 'syntax region %s matchgroup=%s start="^\s*```%s$" matchgroup=%s end="\s*```$" keepend contains=%s%s'
-            execute printf(command, group, startgroup, ft, endgroup, include, has('conceal') ? ' concealends' : '')
+            if has_key(s:filetype_dict, ft)
+                let filetype = s:filetype_dict[ft]
+            else
+                let filetype = ft
+            endif
+            let group = 'mkdSnippet' . toupper(substitute(filetype, '[+-]', '_', 'g'))
+            if !has_key(b:mkd_included_filetypes, filetype)
+                let include = s:SyntaxInclude(filetype)
+                let b:mkd_included_filetypes[filetype] = 1
+            else
+                let include = '@' . toupper(filetype)
+            endif
+            let command_backtick = 'syntax region %s matchgroup=%s start="^\s*`\{3,}\s*%s.*$" matchgroup=%s end="\s*`\{3,}$" keepend contains=%s%s'
+            let command_tilde    = 'syntax region %s matchgroup=%s start="^\s*\~\{3,}\s*%s.*$" matchgroup=%s end="\s*\~\{3,}$" keepend contains=%s%s'
+            execute printf(command_backtick, group, startgroup, ft, endgroup, include, has('conceal') && get(g:, 'vim_markdown_conceal', 1) && get(g:, 'vim_markdown_conceal_code_blocks', 1) ? ' concealends' : '')
+            execute printf(command_tilde,    group, startgroup, ft, endgroup, include, has('conceal') && get(g:, 'vim_markdown_conceal', 1) && get(g:, 'vim_markdown_conceal_code_blocks', 1) ? ' concealends' : '')

             execute printf('syntax cluster mkdNonListItem add=%s', group)
 
             let b:mkd_known_filetypes[ft] = 1
             execute printf('syntax cluster mkdNonListItem add=%s', group)
 
             let b:mkd_known_filetypes[ft] = 1


@@ -587,7 +853,7 @@ function! s:Markdown_highlight_sources(force)
     endfor
 endfunction
 
     endfor
 endfunction
 

-function! s:syntax_include(filetype)
+function! s:SyntaxInclude(filetype)

     " Include the syntax highlighting of another {filetype}.
     let grouplistname = '@' . toupper(a:filetype)
     " Unset the name of the current syntax while including the other syntax
     " Include the syntax highlighting of another {filetype}.
     let grouplistname = '@' . toupper(a:filetype)
     " Unset the name of the current syntax while including the other syntax


@@ -611,17 +877,34 @@ function! s:syntax_include(filetype)
     return grouplistname
 endfunction
 
     return grouplistname
 endfunction
 

+function! s:IsHighlightSourcesEnabledForBuffer()
+    " Enable for markdown buffers, and for liquid buffers with markdown format
+    return &filetype =~# 'markdown' || get(b:, 'liquid_subtype', '') =~# 'markdown'
+endfunction
+
+function! s:MarkdownRefreshSyntax(force)
+    " Use != to compare &syntax's value to use the same logic run on
+    " $VIMRUNTIME/syntax/synload.vim.
+    "
+    " vint: next-line -ProhibitEqualTildeOperator
+    if s:IsHighlightSourcesEnabledForBuffer() && line('$') > 1 && &syntax != 'OFF'
+        call s:MarkdownHighlightSources(a:force)
+    endif
+endfunction

 
 

-function! s:Markdown_refresh_syntax(force)
-    if &filetype == 'markdown' && line('$') > 1
-        call s:Markdown_highlight_sources(a:force)
+function! s:MarkdownClearSyntaxVariables()
+    if s:IsHighlightSourcesEnabledForBuffer()
+        unlet! b:mkd_included_filetypes

     endif
 endfunction
 
 augroup Mkd
     endif
 endfunction
 
 augroup Mkd

-    autocmd!
-    au BufWinEnter * call s:Markdown_refresh_syntax(1)
-    au BufWritePost * call s:Markdown_refresh_syntax(0)
-    au InsertEnter,InsertLeave * call s:Markdown_refresh_syntax(0)
-    au CursorHold,CursorHoldI * call s:Markdown_refresh_syntax(0)
+    " These autocmd calling s:MarkdownRefreshSyntax need to be kept in sync with
+    " the autocmds calling s:MarkdownSetupFolding in after/ftplugin/markdown.vim.
+    autocmd! * <buffer>
+    autocmd BufWinEnter <buffer> call s:MarkdownRefreshSyntax(1)
+    autocmd BufUnload <buffer> call s:MarkdownClearSyntaxVariables()
+    autocmd BufWritePost <buffer> call s:MarkdownRefreshSyntax(0)
+    autocmd InsertEnter,InsertLeave <buffer> call s:MarkdownRefreshSyntax(0)
+    autocmd CursorHold,CursorHoldI <buffer> call s:MarkdownRefreshSyntax(0)

 augroup END
 augroup END