Allow fenced code block with extended info strings

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

diff --git a/ftplugin/markdown.vim b/ftplugin/markdown.vim
index 7e2b35e8e51d82d2adac075b3190ebb3d848559a..1ce35a89be59515d026ee773118d79b67edbc609 100644 (file)
--- a/ftplugin/markdown.vim
+++ b/ftplugin/markdown.vim
@@ -303,43 +303,66 @@ function! s:Toc(...)
     endif
 
 
-    let b:bufnr = bufnr('%')
-    let b:fenced_block = 0
-    let b:header_list = []
+    let l:bufnr = bufnr('%')
+    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('$'))
         let l:lineraw = getline(i)
         let l:l1 = getline(i+1)
         let l:line = substitute(l:lineraw, "#", "\\\#", "g")
         if l:line =~ '````*' || l:line =~ '\~\~\~\~*'
-            if b:fenced_block == 0
-                let b:fenced_block = 1
-            elseif b:fenced_block == 1
-                let b:fenced_block = 0
+            if l:fenced_block == 0
+                let l:fenced_block = 1
+            elseif l:fenced_block == 1
+                let l:fenced_block = 0
+            endif
+        elseif l:vim_markdown_frontmatter == 1
+            if l:front_matter == 1
+                if l:line == '---'
+                    let l:front_matter = 0
+                endif
+            elseif i == 1
+                if l:line == '---'
+                    let l:front_matter = 1
+                endif
             endif
         endif
-        if l:line =~ '^#\+' || l:l1 =~ '^==\+\s*' || l:l1 =~ '^--\+\s*'
-            let b:is_header = 1
+        if l:line =~ '^#\+' || (l:l1 =~ '^=\+\s*$' || l:l1 =~ '^-\+\s*$') && l:line =~ '^\S'
+            let l:is_header = 1
         else
-            let b:is_header = 0
+            let l:is_header = 0
         endif
-        if b:is_header == 1 && b:fenced_block == 0
+        if l:is_header == 1 && l:fenced_block == 0 && l:front_matter == 0
             " append line to location list
-            let b:item = {'lnum': i, 'text': l:line, 'valid': 1, 'bufnr': b:bufnr, 'col': 1}
-            let b:header_list = b:header_list + [b:item]
+            let l:item = {'lnum': i, 'text': l:line, 'valid': 1, 'bufnr': l:bufnr, 'col': 1}
+            let l:header_list = l:header_list + [l:item]
+            " keep track of the longest header size (heading level + title)
+            let l:total_len = stridx(l:line, ' ') + len(l:line)
+            if l:total_len > l:header_max_len
+                let l:header_max_len = l:total_len
+            endif
         endif
     endfor
-    if len(b:header_list) == 0
+    if len(l:header_list) == 0
         echom "Toc: No headers."
         return
     endif
-    call setloclist(0, b:header_list)
+    call setloclist(0, l:header_list)
 
     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
+            execute 'vertical resize ' . (l:header_max_len + 1)
+        else
+            execute 'vertical resize ' . (&columns/2)
+        endif
     elseif l:window_type ==# 'tab'
         tab lopen
     else
@@ -586,7 +609,7 @@ let s:filetype_dict = {
     \ 'viml': 'vim'
 \ }
 
-function! s:Markdown_highlight_sources(force)
+function! s:MarkdownHighlightSources(force)
     " Syntax highlight source code embedded in notes.
     " Look for code blocks in the current file
     let filetypes = {}
@@ -612,7 +635,7 @@ function! s:Markdown_highlight_sources(force)
                 let filetype = ft
             endif
             let group = 'mkdSnippet' . toupper(substitute(filetype, "[+-]", "_", "g"))
-            let include = s:syntax_include(filetype)
+            let include = s:SyntaxInclude(filetype)
             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' : '')
             execute printf('syntax cluster mkdNonListItem add=%s', group)
@@ -622,7 +645,7 @@ function! s:Markdown_highlight_sources(force)
     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
@@ -647,16 +670,16 @@ function! s:syntax_include(filetype)
 endfunction
 
 
-function! s:Markdown_refresh_syntax(force)
+function! s:MarkdownRefreshSyntax(force)
     if &filetype == 'markdown' && line('$') > 1
-        call s:Markdown_highlight_sources(a:force)
+        call s:MarkdownHighlightSources(a:force)
     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)
+    au BufWinEnter * call s:MarkdownRefreshSyntax(1)
+    au BufWritePost * call s:MarkdownRefreshSyntax(0)
+    au InsertEnter,InsertLeave * call s:MarkdownRefreshSyntax(0)
+    au CursorHold,CursorHoldI * call s:MarkdownRefreshSyntax(0)
 augroup END