Fix folding with code block and level setting

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

diff --git a/after/ftplugin/markdown.vim b/after/ftplugin/markdown.vim
index f6bfe47c5b5bf41b994b4515f46ddfd263a17faa..586ff2f5b001ee8490c5a6f7d6f8e1fd74b8d2ab 100644 (file)
--- a/after/ftplugin/markdown.vim
+++ b/after/ftplugin/markdown.vim
@@ -7,22 +7,32 @@
 " original version from Steve Losh's gist: https://gist.github.com/1038710
 
 function! s:is_mkdCode(lnum)
-    return synIDattr(synID(a:lnum, 1, 0), 'name') == 'mkdCode'
+    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 l1 =~ '````*' || l1 =~ '\~\~\~\~*'
+            if b:fenced_block == 0
+                let b:fenced_block = 1
+            elseif b:fenced_block == 1
+                let b:fenced_block = 0
+            endif
+        endif
+
         let l2 = getline(a:lnum+1)
-        if  l2 =~ '^==\+\s*' && !s:is_mkdCode(a:lnum+1)
+        if l2 =~ '^==\+\s*' && b:fenced_block == 0 && !s:is_mkdCode(a:lnum+1)
             " next line is underlined (level 1)
             return '>0'
-        elseif l2 =~ '^--\+\s*' && !s:is_mkdCode(a:lnum+1)
+        elseif l2 =~ '^--\+\s*' && b:fenced_block == 0 && !s:is_mkdCode(a:lnum+1)
             " next line is underlined (level 2)
             return '>1'
         endif
 
-        let l1 = getline(a:lnum)
-        if l1 =~ '^#' && !s:is_mkdCode(a:lnum)
+        if l1 =~ '^#' && b:fenced_block == 0 && !s:is_mkdCode(a:lnum)
             " current line starts with hashes
             return '>'.(matchend(l1, '^#\+') - 1)
         elseif a:lnum == 1
@@ -53,7 +63,7 @@ else
             let l0 = getline(a:lnum-1)
         endif
         " keep track of fenced code blocks
-        if l0 =~ '````*' || l0 =~ '~~~~*'
+        if l0 =~ '````*' || l0 =~ '\~\~\~\~*'
             if b:fenced_block == 0
                 let b:fenced_block = 1
             elseif b:fenced_block == 1
@@ -62,36 +72,35 @@ else
         endif
 
         let l2 = getline(a:lnum+1)
-        if  l2 =~ '^==\+\s*' && !s:is_mkdCode(a:lnum+1)
+        if  l2 =~ '^==\+\s*' && b:fenced_block == 0 && !s:is_mkdCode(a:lnum+1)
             " next line is underlined (level 1)
             return '>1'
-        elseif l2 =~ '^--\+\s*' && !s:is_mkdCode(a:lnum+1)
+        elseif l2 =~ '^--\+\s*' && b:fenced_block == 0 && !s:is_mkdCode(a:lnum+1)
             " next line is underlined (level 2)
-            return '>2'
+            if g:vim_markdown_folding_level >= 2
+                return '>1'
+            else
+                return '>2'
+            endif
         endif
 
         let l1 = getline(a:lnum)
-        if l1 =~ '^#' && !s:is_mkdCode(a:lnum)
+        if l1 =~ '^#' && b:fenced_block == 0 && !s:is_mkdCode(a:lnum)
             " fold level according to option
-            " (in vim -1 is visible, >= 0 is folded)
             let l:level = matchend(l1, '^#\+')
             if g:vim_markdown_folding_level == 1 || l:level > g:vim_markdown_folding_level
                 return -1
             else
-                " code blocks are always folded
-                return b:fenced_block
+                " headers are not folded
+                return 0
             endif
         endif
 
-        if l0 =~ '^#' && !s:is_mkdCode(a:lnum-1)
-            " collapse comments in fenced code blocks into a single fold
-            if b:fenced_block == 1
-                return 1
-            endif
+        if l0 =~ '^#' && b:fenced_block == 0 && !s:is_mkdCode(a:lnum-1)
             " current line starts with hashes
             return '>'.matchend(l0, '^#\+')
         else
-            " keep previous foldlevel
+            " fold here because of setext headers
             return '='
         endif
     endfunction