Switch back to plasticboy for markdown

1 files changed, 748 insertions, 155 deletions

diff --git a/ftplugin/markdown.vim b/ftplugin/markdown.vim
index 8d327f61..43c9773a 100644
--- a/ftplugin/markdown.vim
+++ b/ftplugin/markdown.vim
@@ -1,202 +1,795 @@
 if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'markdown') == -1
 
-if exists('b:did_ftplugin') | finish | endif
-
-" {{{ CONFIGURATION
-
-if !exists('g:markdown_flavor')
-  let g:markdown_flavor = 'github'
-endif
-
-if !exists('g:markdown_enable_folding')
-  let g:markdown_enable_folding = 0
-endif
-
-if !exists('g:markdown_enable_mappings')
-  " make it compatible with previous configuration value
-  if exists('g:markdown_include_default_mappings')
-    let g:markdown_enable_mappings = g:markdown_include_default_mappings
-  else
-    let g:markdown_enable_mappings = 1
-  endif
-endif
-
-if !exists('g:markdown_enable_insert_mode_mappings')
-  " make it compatible with previous configuration value
-  if exists('g:markdown_include_insert_mode_default_mappings')
-    let g:markdown_enable_insert_mode_mappings = g:markdown_include_insert_mode_default_mappings
-  else
-    let g:markdown_enable_insert_mode_mappings = 1
-  endif
-endif
+"TODO print messages when on visual mode. I only see VISUAL, not the messages.
+
+" Function interface phylosophy:
+"
+" - functions take arbitrary line numbers as parameters.
+"    Current cursor line is only a suitable default parameter.
+"
+" - only functions that bind directly to user actions:
+"
+"    - print error messages.
+"       All intermediate functions limit themselves return `0` to indicate an error.
+"
+"    - move the cursor. All other functions do not move the cursor.
+"
+" This is how you should view headers for the header mappings:
+"
+"   |BUFFER
+"   |
+"   |Outside any header
+"   |
+" a-+# a
+"   |
+"   |Inside a
+"   |
+" a-+
+" b-+## b
+"   |
+"   |inside b
+"   |
+" b-+
+" c-+### c
+"   |
+"   |Inside c
+"   |
+" c-+
+" d-|# d
+"   |
+"   |Inside d
+"   |
+" d-+
+" e-|e
+"   |====
+"   |
+"   |Inside e
+"   |
+" e-+
+
+" For each level, contains the regexp that matches at that level only.
+"
+let s:levelRegexpDict = {
+    \ 1: '\v^(#[^#]@=|.+\n\=+$)',
+    \ 2: '\v^(##[^#]@=|.+\n-+$)',
+    \ 3: '\v^###[^#]@=',
+    \ 4: '\v^####[^#]@=',
+    \ 5: '\v^#####[^#]@=',
+    \ 6: '\v^######[^#]@='
+\ }
+
+" Maches 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.
+"
+let s:headersRegexp = '\v^(#|.+\n(\=+|-+)$)'
+
+" Returns the line number of the first header before `line`, called the
+" current header.
+"
+" If there is no current header, return `0`.
+"
+" @param a:1 The line to look the header of. Default value: `getpos('.')`.
+"
+function! s:GetHeaderLineNum(...)
+    if a:0 == 0
+        let l:l = line('.')
+    else
+        let l:l = a:1
+    endif
+    while(l:l > 0)
+        if join(getline(l:l, l:l + 1), "\n") =~ s:headersRegexp
+            return l:l
+        endif
+        let l:l -= 1
+    endwhile
+    return 0
+endfunction
 
-if !exists('g:markdown_enable_insert_mode_leader_mappings')
-    let g:markdown_enable_insert_mode_leader_mappings = 0
-endif
+" -  if inside a header goes to it.
+"    Return its line number.
+"
+" -  if on top level outside any headers,
+"    print a warning
+"    Return `0`.
+"
+function! s:MoveToCurHeader()
+    let l:lineNum = s:GetHeaderLineNum()
+    if l:lineNum != 0
+        call cursor(l:lineNum, 1)
+    else
+        echo 'outside any header'
+        "normal! gg
+    endif
+    return l:lineNum
+endfunction
 
-if !exists('g:markdown_drop_empty_blockquotes')
-    let g:markdown_drop_empty_blockquotes = 0
-endif
+" Move cursor to next header of any level.
+"
+" If there are no more headers, print a warning.
+"
+function! s:MoveToNextHeader()
+    if search(s:headersRegexp, 'W') == 0
+        "normal! G
+        echo 'no next header'
+    endif
+endfunction
 
-if !exists('g:markdown_mapping_switch_status')
-  let g:markdown_mapping_switch_status = '<space>'
-endif
+" Move cursor to previous header (before current) of any level.
+"
+" If it does not exist, print a warning.
+"
+function! s:MoveToPreviousHeader()
+    let l:curHeaderLineNumber = s:GetHeaderLineNum()
+    let l:noPreviousHeader = 0
+    if l:curHeaderLineNumber <= 1
+        let l:noPreviousHeader = 1
+    else
+        let l:previousHeaderLineNumber = s:GetHeaderLineNum(l:curHeaderLineNumber - 1)
+        if l:previousHeaderLineNumber == 0
+            let l:noPreviousHeader = 1
+        else
+            call cursor(l:previousHeaderLineNumber, 1)
+        endif
+    endif
+    if l:noPreviousHeader
+        echo 'no previous header'
+    endif
+endfunction
 
-if !exists('g:markdown_enable_spell_checking')
-  let g:markdown_enable_spell_checking = 1
-endif
+" - if line is inside a header, return the header level (h1 -> 1, h2 -> 2, etc.).
+"
+" - if line is at top level outside any headers, return `0`.
+"
+function! s:GetHeaderLevel(...)
+    if a:0 == 0
+        let l:line = line('.')
+    else
+        let l:line = a:1
+    endif
+    let l:linenum = s:GetHeaderLineNum(l:line)
+    if l:linenum != 0
+        return s:GetLevelOfHeaderAtLine(l:linenum)
+    else
+        return 0
+    endif
+endfunction
 
-if !exists('g:markdown_enable_input_abbreviations')
-  let g:markdown_enable_input_abbreviations = 1
-endif
+" Returns the level of the header at the given line.
+"
+" If there is no header at the given line, returns `0`.
+"
+function! s:GetLevelOfHeaderAtLine(linenum)
+    let l:lines = join(getline(a:linenum, a:linenum + 1), "\n")
+    for l:key in keys(s:levelRegexpDict)
+        if l:lines =~ get(s:levelRegexpDict, l:key)
+            return l:key
+        endif
+    endfor
+    return 0
+endfunction
 
-" }}}
+" Move cursor to parent header of the current header.
+"
+" If it does not exit, print a warning and do nothing.
+"
+function! s:MoveToParentHeader()
+    let l:linenum = s:GetParentHeaderLineNumber()
+    if l:linenum != 0
+        call cursor(l:linenum, 1)
+    else
+        echo 'no parent header'
+    endif
+endfunction
 
+" Return the line number of the parent header of line `line`.
+"
+" If it has no parent, return `0`.
+"
+function! s:GetParentHeaderLineNumber(...)
+    if a:0 == 0
+        let l:line = line('.')
+    else
+        let l:line = a:1
+    endif
+    let l:level = s:GetHeaderLevel(l:line)
+    if l:level > 1
+        let l:linenum = s:GetPreviousHeaderLineNumberAtLevel(l:level - 1, l:line)
+        return l:linenum
+    endif
+    return 0
+endfunction
 
-" {{{ OPTIONS
+" Return the line number of the previous header of given level.
+" in relation to line `a:1`. If not given, `a:1 = getline()`
+"
+" `a:1` line is included, and this may return the current header.
+"
+" If none return 0.
+"
+function! s:GetNextHeaderLineNumberAtLevel(level, ...)
+    if a:0 < 1
+        let l:line = line('.')
+    else
+        let l:line = a:1
+    endif
+    let l:l = l:line
+    while(l:l <= line('$'))
+        if join(getline(l:l, l:l + 1), "\n") =~ get(s:levelRegexpDict, a:level)
+            return l:l
+        endif
+        let l:l += 1
+    endwhile
+    return 0
+endfunction
 
-setlocal textwidth=0
-setlocal ts=2 sw=2 expandtab smarttab
-setlocal comments=b:*,b:-,b:+,n:>,se:``` commentstring=>\ %s
-setlocal formatoptions=tron
-setlocal formatlistpat=^\\s*\\d\\+\\.\\s\\+\\\\|^\\s*[+-\\*]\\s\\+
-setlocal nolisp
-setlocal autoindent
+" Return the line number of the previous header of given level.
+" in relation to line `a:1`. If not given, `a:1 = getline()`
+"
+" `a:1` line is included, and this may return the current header.
+"
+" If none return 0.
+"
+function! s:GetPreviousHeaderLineNumberAtLevel(level, ...)
+    if a:0 == 0
+        let l:line = line('.')
+    else
+        let l:line = a:1
+    endif
+    let l:l = l:line
+    while(l:l > 0)
+        if join(getline(l:l, l:l + 1), "\n") =~ get(s:levelRegexpDict, a:level)
+            return l:l
+        endif
+        let l:l -= 1
+    endwhile
+    return 0
+endfunction
 
-" Enable spelling and completion based on dictionary words
-if &spelllang !~# '^\s*$' && g:markdown_enable_spell_checking
-  setlocal spell
-endif
+" Move cursor to next sibling header.
+"
+" If there is no next siblings, print a warning and don't move.
+"
+function! s:MoveToNextSiblingHeader()
+    let l:curHeaderLineNumber = s:GetHeaderLineNum()
+    let l:curHeaderLevel = s:GetLevelOfHeaderAtLine(l:curHeaderLineNumber)
+    let l:curHeaderParentLineNumber = s:GetParentHeaderLineNumber()
+    let l:nextHeaderSameLevelLineNumber = s:GetNextHeaderLineNumberAtLevel(l:curHeaderLevel, l:curHeaderLineNumber + 1)
+    let l:noNextSibling = 0
+    if l:nextHeaderSameLevelLineNumber == 0
+        let l:noNextSibling = 1
+    else
+        let l:nextHeaderSameLevelParentLineNumber = s:GetParentHeaderLineNumber(l:nextHeaderSameLevelLineNumber)
+        if l:curHeaderParentLineNumber == l:nextHeaderSameLevelParentLineNumber
+            call cursor(l:nextHeaderSameLevelLineNumber, 1)
+        else
+            let l:noNextSibling = 1
+        endif
+    endif
+    if l:noNextSibling
+        echo 'no next sibling header'
+    endif
+endfunction
 
-" Custom dictionary for emoji
-execute 'setlocal dictionary+=' . shellescape(expand('<sfile>:p:h:h')) . '/dict/emoticons.dict'
-setlocal iskeyword+=:,+,-
-setlocal complete+=k
-
-if g:markdown_enable_input_abbreviations
-  " Replace common ascii emoticons with supported emoji
-  iabbrev <buffer> :-) :smile:
-  iabbrev <buffer> :-D :laughing:
-  iabbrev <buffer> :-( :disappointed:
-
-  " Replace common punctuation
-  iabbrev <buffer> ... …
-  iabbrev <buffer> << «
-  iabbrev <buffer> >> »
-endif
+" Move cursor to previous sibling header.
+"
+" If there is no previous siblings, print a warning and do nothing.
+"
+function! s:MoveToPreviousSiblingHeader()
+    let l:curHeaderLineNumber = s:GetHeaderLineNum()
+    let l:curHeaderLevel = s:GetLevelOfHeaderAtLine(l:curHeaderLineNumber)
+    let l:curHeaderParentLineNumber = s:GetParentHeaderLineNumber()
+    let l:previousHeaderSameLevelLineNumber = s:GetPreviousHeaderLineNumberAtLevel(l:curHeaderLevel, l:curHeaderLineNumber - 1)
+    let l:noPreviousSibling = 0
+    if l:previousHeaderSameLevelLineNumber == 0
+        let l:noPreviousSibling = 1
+    else
+        let l:previousHeaderSameLevelParentLineNumber = s:GetParentHeaderLineNumber(l:previousHeaderSameLevelLineNumber)
+        if l:curHeaderParentLineNumber == l:previousHeaderSameLevelParentLineNumber
+            call cursor(l:previousHeaderSameLevelLineNumber, 1)
+        else
+            let l:noPreviousSibling = 1
+        endif
+    endif
+    if l:noPreviousSibling
+        echo 'no previous sibling header'
+    endif
+endfunction
 
-" Folding
-if g:markdown_enable_folding
-  setlocal foldmethod=expr
-  setlocal foldexpr=markdown#FoldLevelOfLine(v:lnum)
-endif
+function! s:Toc(...)
+    if a:0 > 0
+        let l:window_type = a:1
+    else
+        let l:window_type = 'vertical'
+    endif
 
-" }}}
 
+    let l:bufnr = bufnr('%')
+    let l:cursor_line = line('.')
+    let l:cursor_header = 0
+    let l:fenced_block = 0
+    let l:front_matter = 0
+    let l:header_list = []
+    let l:header_max_len = 0
+    let l:vim_markdown_toc_autofit = get(g:, "vim_markdown_toc_autofit", 0)
+    let l:vim_markdown_frontmatter = get(g:, "vim_markdown_frontmatter", 0)
+    for i in range(1, line('$'))
+        let l:lineraw = getline(i)
+        let l:l1 = getline(i+1)
+        let l:line = substitute(l:lineraw, "#", "\\\#", "g")
+        if l:line =~ '````*' || l:line =~ '\~\~\~\~*'
+            if l:fenced_block == 0
+                let l:fenced_block = 1
+            elseif l:fenced_block == 1
+                let l:fenced_block = 0
+            endif
+        elseif l:vim_markdown_frontmatter == 1
+            if l:front_matter == 1
+                if l:line == '---'
+                    let l:front_matter = 0
+                endif
+            elseif i == 1
+                if l:line == '---'
+                    let l:front_matter = 1
+                endif
+            endif
+        endif
+        if l:line =~ '^#\+' || (l:l1 =~ '^=\+\s*$' || l:l1 =~ '^-\+\s*$') && 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
+            " append line to location list
+            let l:item = {'lnum': i, 'text': l:line, 'valid': 1, 'bufnr': l:bufnr, 'col': 1}
+            let l:header_list = l:header_list + [l:item]
+            " set header number of the cursor position
+            if l:cursor_header == 0
+                if i == l:cursor_line
+                    let l:cursor_header = len(l:header_list)
+                elseif i > l:cursor_line
+                    let l:cursor_header = len(l:header_list) - 1
+                endif
+            endif
+            " keep track of the longest header size (heading level + title)
+            let l:total_len = stridx(l:line, ' ') + strdisplaywidth(l:line)
+            if l:total_len > l:header_max_len
+                let l:header_max_len = l:total_len
+            endif
+        endif
+    endfor
+    call setloclist(0, l:header_list)
+    if len(l:header_list) == 0
+        echom "Toc: No headers."
+        return
+    endif
 
-" {{{ FUNCTIONS
+    if l:window_type ==# 'horizontal'
+        lopen
+    elseif l:window_type ==# 'vertical'
+        vertical lopen
+        " auto-fit toc window when possible to shrink it
+        if (&columns/2) > l:header_max_len && l:vim_markdown_toc_autofit == 1
+            execute 'vertical resize ' . (l:header_max_len + 1)
+        else
+            execute 'vertical resize ' . (&columns/2)
+        endif
+    elseif l:window_type ==# 'tab'
+        tab lopen
+    else
+        lopen
+    endif
+    setlocal modifiable
+    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)
+    endfor
+    setlocal nomodified
+    setlocal nomodifiable
+    execute 'normal! ' . l:cursor_header . 'G'
+endfunction
 
-function! s:JumpToHeader(forward, visual)
-  let cnt = v:count1
-  let save = @/
-  let pattern = '\v^#{1,6}.*$|^.+\n%(\-+|\=+)$'
-  if a:visual
-    normal! gv
-  endif
-  if a:forward
-    let motion = '/' . pattern
-  else
-    let motion = '?' . pattern
-  endif
-  while cnt > 0
-	  silent! execute motion
-	  let cnt = cnt - 1
-  endwhile
-  call histdel('/', -1)
-  let @/ = save
+" Convert Setex headers in range `line1 .. line2` to Atx.
+"
+" Return the number of conversions.
+"
+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-+$/## \1/'
+    return l:originalNumLines - line('$')
 endfunction
 
-function! s:Indent(indent)
-  if getline('.') =~ '\v^\s*%([-*+]|\d\.)\s*$'
-    if a:indent
-      normal >>
+" If `a:1` is 0, decrease the level of all headers in range `line1 .. line2`.
+"
+" Otherwise, increase the level. `a:1` defaults to `0`.
+"
+function! s:HeaderDecrease(line1, line2, ...)
+    if a:0 > 0
+        let l:increase = a:1
     else
-      normal <<
+        let l:increase = 0
     endif
-    call setline('.', substitute(getline('.'), '\([-*+]\|\d\.\)\s*$', '\1 ', ''))
-    normal $
-  elseif getline('.') =~ '\v^\s*(\s?\>)+\s*$'
-    if a:indent
-      call setline('.', substitute(getline('.'), '>\s*$', '>> ', ''))
+    if l:increase
+        let l:forbiddenLevel = 6
+        let l:replaceLevels = [5, 1]
+        let l:levelDelta = 1
     else
-      call setline('.', substitute(getline('.'), '\s*>\s*$', ' ', ''))
-      call setline('.', substitute(getline('.'), '^\s\+$', '', ''))
+        let l:forbiddenLevel = 1
+        let l:replaceLevels = [2, 6]
+        let l:levelDelta = -1
     endif
-    normal $
-  endif
+    for l:line in range(a:line1, a:line2)
+        if join(getline(l:line, l:line + 1), "\n") =~ s:levelRegexpDict[l:forbiddenLevel]
+            echomsg 'There is an h' . l:forbiddenLevel . ' at line ' . l:line . '. Aborting.'
+            return
+        endif
+    endfor
+    let l:numSubstitutions = s:SetexToAtx(a:line1, a:line2)
+    let l:flags = (&gdefault ? '' : 'g')
+    for l:level in range(replaceLevels[0], replaceLevels[1], -l:levelDelta)
+        execute 'silent! ' . a:line1 . ',' . (a:line2 - l:numSubstitutions) . 'substitute/' . s:levelRegexpDict[l:level] . '/' . repeat('#', l:level + l:levelDelta) . '/' . l:flags
+    endfor
+endfunction
+
+" Format table under cursor.
+"
+" Depends on Tabularize.
+"
+function! s:TableFormat()
+    let l:pos = getpos('.')
+    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, 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')
+    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/ /-/' . l:flags
+    call setpos('.', l:pos)
 endfunction
 
-function! s:IsAnEmptyListItem()
-  return getline('.') =~ '\v^\s*%([-*+]|\d\.)\s*$'
+" Wrapper to do move commands in visual mode.
+"
+function! s:VisMove(f)
+    norm! gv
+    call function(a:f)()
 endfunction
 
-function! s:IsAnEmptyQuote()
-  return getline('.') =~ '\v^\s*(\s?\>)+\s*$'
+" Map in both normal and visual modes.
+"
+function! s:MapNormVis(rhs,lhs)
+    execute 'nn <buffer><silent> ' . a:rhs . ' :call ' . a:lhs . '()<cr>'
+    execute 'vn <buffer><silent> ' . a:rhs . ' <esc>:call <sid>VisMove(''' . a:lhs . ''')<cr>'
 endfunction
 
-" }}}
+" Parameters:
+"
+" - step +1 for right, -1 for left
+"
+" TODO: multiple lines.
+"
+function! s:FindCornerOfSyntax(lnum, col, step)
+    let l:col = a:col
+    let l:syn = synIDattr(synID(a:lnum, l:col, 1), 'name')
+    while synIDattr(synID(a:lnum, l:col, 1), 'name') ==# l:syn
+        let l:col += a:step
+    endwhile
+    return l:col - a:step
+endfunction
+
+" Return the next position of the given syntax name,
+" inclusive on the given position.
+"
+" TODO: multiple lines
+"
+function! s:FindNextSyntax(lnum, col, name)
+    let l:col = a:col
+    let l:step = 1
+    while synIDattr(synID(a:lnum, l:col, 1), 'name') !=# a:name
+        let l:col += l:step
+    endwhile
+    return [a:lnum, l:col]
+endfunction
 
+function! s:FindCornersOfSyntax(lnum, col)
+    return [<sid>FindLeftOfSyntax(a:lnum, a:col), <sid>FindRightOfSyntax(a:lnum, a:col)]
+endfunction
 
-" {{{ MAPPINGS
+function! s:FindRightOfSyntax(lnum, col)
+    return <sid>FindCornerOfSyntax(a:lnum, a:col, 1)
+endfunction
 
-" Commands
-command! -nargs=0 -range MarkdownEditBlock :<line1>,<line2>call markdown#EditBlock()
+function! s:FindLeftOfSyntax(lnum, col)
+    return <sid>FindCornerOfSyntax(a:lnum, a:col, -1)
+endfunction
 
-if g:markdown_enable_mappings
-  " Jumping around
-  noremap <silent> <buffer> <script> ]] :<C-u>call <SID>JumpToHeader(1, 0)<CR>
-  noremap <silent> <buffer> <script> [[ :<C-u>call <SID>JumpToHeader(0, 0)<CR>
-  vnoremap <silent> <buffer> <script> ]] :<C-u>call <SID>JumpToHeader(1, 1)<CR>
-  vnoremap <silent> <buffer> <script> [[ :<C-u>call <SID>JumpToHeader(0, 1)<CR>
-  noremap <silent> <buffer> <script> ][ <nop>
-  noremap <silent> <buffer> <script> [] <nop>
+" Returns:
+"
+" - a string with the the URL for the link under the cursor
+" - an empty string if the cursor is not on a link
+"
+" TODO
+"
+" - multiline support
+" - give an error if the separator does is not on a link
+"
+function! s:Markdown_GetUrlForPosition(lnum, col)
+    let l:lnum = a:lnum
+    let l:col = a:col
+    let l:syn = synIDattr(synID(l:lnum, l:col, 1), 'name')
+
+    if l:syn ==# 'mkdInlineURL' || l:syn ==# 'mkdURL' || l:syn ==# 'mkdLinkDefTarget'
+        " Do nothing.
+    elseif l:syn ==# 'mkdLink'
+        let [l:lnum, l:col] = <sid>FindNextSyntax(l:lnum, l:col, 'mkdURL')
+        let l:syn = 'mkdURL'
+    elseif l:syn ==# 'mkdDelimiter'
+        let l:line = getline(l:lnum)
+        let l:char = l:line[col - 1]
+        if l:char ==# '<'
+            let l:col += 1
+        elseif l:char ==# '>' || l:char ==# ')'
+            let l:col -= 1
+        elseif l:char ==# '[' || l:char ==# ']' || l:char ==# '('
+            let [l:lnum, l:col] = <sid>FindNextSyntax(l:lnum, l:col, 'mkdURL')
+        else
+            return ''
+        endif
+    else
+        return ''
+    endif
 
-  if g:markdown_enable_insert_mode_mappings
-    " Indenting things
-    inoremap <silent> <buffer> <script> <expr> <Tab>
-      \ <SID>IsAnEmptyListItem() \|\| <SID>IsAnEmptyQuote() ? '<C-O>:call <SID>Indent(1)<CR>' : '<Tab>'
-    inoremap <silent> <buffer> <script> <expr> <S-Tab>
-      \ <SID>IsAnEmptyListItem() \|\| <SID>IsAnEmptyQuote() ? '<C-O>:call <SID>Indent(0)<CR>' : '<Tab>'
+    let [l:left, l:right] = <sid>FindCornersOfSyntax(l:lnum, l:col)
+    return getline(l:lnum)[l:left - 1 : l:right - 1]
+endfunction
 
-    if g:markdown_drop_empty_blockquotes
-      " Remove empty quote and list items when press <CR>
-      inoremap <silent> <buffer> <script> <expr> <CR> <SID>IsAnEmptyQuote() \|\| <SID>IsAnEmptyListItem() ? '<C-O>:normal 0D<CR>' : '<CR>'
+" Front end for GetUrlForPosition.
+"
+function! s:OpenUrlUnderCursor()
+    let l:url = s:Markdown_GetUrlForPosition(line('.'), col('.'))
+    if l:url != ''
+        call s:VersionAwareNetrwBrowseX(l:url)
     else
-      " Remove only empty list items when press <CR>
-      inoremap <silent> <buffer> <script> <expr> <CR> <SID>IsAnEmptyListItem() ? '<C-O>:normal 0D<CR>' : '<CR>'
+        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: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, ':.'))
+                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
+                execute l:editmethod l:url
+            endif
+            if l:anchor != ''
+                silent! execute '/'.l:anchor
+            endif
+        else
+            echomsg 'The cursor is not on a link.'
+        endif
+    endfunction
+endif
 
-    " Format tables
-    inoremap <silent> <buffer> <Bar> <Bar><Esc>:call markdown#FormatTable()<CR>a
-  endif
+function! s:VersionAwareNetrwBrowseX(url)
+    if has('patch-7.4.567')
+        call netrw#BrowseX(a:url, 0)
+    else
+        call netrw#NetrwBrowseX(a:url, 0)
+    endif
+endf
 
-  " Switch status of things
-  execute 'nnoremap <silent> <buffer> ' . g:markdown_mapping_switch_status . ' :call markdown#SwitchStatus()<CR>'
+function! s:MapNotHasmapto(lhs, rhs)
+    if !hasmapto('<Plug>' . a:rhs)
+        execute 'nmap <buffer>' . a:lhs . ' <Plug>' . a:rhs
+        execute 'vmap <buffer>' . a:lhs . ' <Plug>' . a:rhs
+    endif
+endfunction
 
-  " Leader mappings
-  nnoremap <buffer> <Leader>e :MarkdownEditBlock<CR>
-  vnoremap <buffer> <Leader>e :MarkdownEditBlock<CR>
-  nnoremap <silent> <buffer> <Leader>ft  :call markdown#FormatTable()<CR>
+call <sid>MapNormVis('<Plug>Markdown_MoveToNextHeader', '<sid>MoveToNextHeader')
+call <sid>MapNormVis('<Plug>Markdown_MoveToPreviousHeader', '<sid>MoveToPreviousHeader')
+call <sid>MapNormVis('<Plug>Markdown_MoveToNextSiblingHeader', '<sid>MoveToNextSiblingHeader')
+call <sid>MapNormVis('<Plug>Markdown_MoveToPreviousSiblingHeader', '<sid>MoveToPreviousSiblingHeader')
+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')
+    call <sid>MapNotHasmapto('[[', 'Markdown_MoveToPreviousHeader')
+    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('gx', 'Markdown_OpenUrlUnderCursor')
+    call <sid>MapNotHasmapto('ge', 'Markdown_EditUrlUnderCursor')
+endif
 
-  " Insert Mode mappings
-  if g:markdown_enable_insert_mode_leader_mappings
-    inoremap <buffer> <Leader>e <Esc>:MarkdownEditBlock<CR>
-    inoremap <silent> <buffer> <Leader>ft  <Esc>:call markdown#FormatTable()<CR>a
-  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 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')
+
+" Heavily based on vim-notes - http://peterodding.com/code/vim/notes/
+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, '$')
+        let ft = matchstr(line, '```\s*\zs[0-9A-Za-z_+-]*')
+        if !empty(ft) && ft !~ '^\d*$' | let filetypes[ft] = 1 | 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
+
+    " Now we're ready to actually highlight the code blocks.
+    let startgroup = 'mkdCodeStart'
+    let endgroup = 'mkdCodeEnd'
+    for ft in keys(filetypes)
+        if a:force || !has_key(b:mkd_known_filetypes, ft)
+            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 = 'syntax region %s matchgroup=%s start="^\s*```\s*%s$" matchgroup=%s end="\s*```$" keepend contains=%s%s'
+            execute printf(command, 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
+        endif
+    endfor
+endfunction
+
+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
+    " because some syntax scripts do nothing when "b:current_syntax" is set
+    if exists('b:current_syntax')
+        let syntax_save = b:current_syntax
+        unlet b:current_syntax
+    endif
+    try
+        execute 'syntax include' grouplistname 'syntax/' . a:filetype . '.vim'
+        execute 'syntax include' grouplistname 'after/syntax/' . a:filetype . '.vim'
+    catch /E484/
+        " Ignore missing scripts
+    endtry
+    " Restore the name of the current syntax
+    if exists('syntax_save')
+        let b:current_syntax = syntax_save
+    elseif exists('b:current_syntax')
+        unlet b:current_syntax
+    endif
+    return grouplistname
+endfunction
+
+
+function! s:MarkdownRefreshSyntax(force)
+    if &filetype =~ 'markdown' && line('$') > 1
+        call s:MarkdownHighlightSources(a:force)
+    endif
+endfunction
+
+function! s:MarkdownClearSyntaxVariables()
+    if &filetype =~ 'markdown'
+        unlet! b:mkd_included_filetypes
+    endif
+endfunction
 
-let b:did_ftplugin = 1
+augroup Mkd
+    " 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
 
 endif