Fix performance issue with markdown highlightingv4.2.0

3 files changed, 2 insertions, 207 deletions

diff --git a/after/ftplugin/markdown.vim b/after/ftplugin/markdown.vim
deleted file mode 100644
index 1d1e410c..00000000
--- a/after/ftplugin/markdown.vim
+++ /dev/null
@@ -1,205 +0,0 @@
-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
diff --git a/build b/build
index 7e4b5221..6ef3f5fd 100755
--- a/build
+++ b/build
@@ -233,7 +233,7 @@ PACKS="
   log:MTDL9/vim-log-highlighting
   lua:tbastos/vim-lua
   mako:sophacles/vim-bundle-mako
-  markdown:plasticboy/vim-markdown
+  markdown:plasticboy/vim-markdown:_NOAFTER
   mathematica:voldikss/vim-mma
   mdx:jxnblk/vim-mdx-js
   meson:mesonbuild/meson:_ALL:/data/syntax-highlighting/vim/
diff --git a/ftdetect/polyglot.vim b/ftdetect/polyglot.vim
index cd389fdd..c42c5852 100644
--- a/ftdetect/polyglot.vim
+++ b/ftdetect/polyglot.vim
@@ -816,7 +816,7 @@ endif
 
 if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'markdown') == -1
   augroup filetypedetect
-  " markdown, from markdown.vim in plasticboy/vim-markdown
+  " markdown, from markdown.vim in plasticboy/vim-markdown:_NOAFTER
 if !has('patch-7.4.480')
     " Before this patch, vim used modula2 for .md.
     au! filetypedetect BufRead,BufNewFile *.md