From 156e0bfe4e68b01e28aee884bf4e69a34d3e7b1a Mon Sep 17 00:00:00 2001
From: Hiroshi Shirosaki <h.shirosaki@gmail.com>
Date: Fri, 19 Feb 2016 14:07:14 +0900
Subject: [PATCH] Fix fenced code block syntax when reopening a file

Fix #259
---
 ftplugin/markdown.vim |  7 +++++++
 test/syntax.vader     | 16 ++++++++++++++++
 2 files changed, 23 insertions(+)

diff --git a/ftplugin/markdown.vim b/ftplugin/markdown.vim
index e189ec4..c7fba7f 100644
--- a/ftplugin/markdown.vim
+++ b/ftplugin/markdown.vim
@@ -706,9 +706,16 @@ function! s:MarkdownRefreshSyntax(force)
     endif
 endfunction
 
+function! s:MarkdownClearSyntaxVariables()
+    if &filetype == 'markdown'
+        unlet! b:mkd_included_filetypes
+    endif
+endfunction
+
 augroup Mkd
     autocmd!
     au BufWinEnter * call s:MarkdownRefreshSyntax(1)
+    au BufUnload * call s:MarkdownClearSyntaxVariables()
     au BufWritePost * call s:MarkdownRefreshSyntax(0)
     au InsertEnter,InsertLeave * call s:MarkdownRefreshSyntax(0)
     au CursorHold,CursorHoldI * call s:MarkdownRefreshSyntax(0)
diff --git a/test/syntax.vader b/test/syntax.vader
index 98548a0..fda56e0 100644
--- a/test/syntax.vader
+++ b/test/syntax.vader
@@ -437,6 +437,22 @@ Execute (fenced code block languages setting):
   AssertEqual SyntaxOf('foo'), 'csString'
   unlet g:vim_markdown_fenced_languages
 
+Given markdown;
+```vim
+let g:a = 1
+```
+
+Execute (fenced code block includes language syntax with reopening same buffer):
+  let b:func = Markdown_GetFunc('vim-markdown/ftplugin/markdown.vim', 'MarkdownRefreshSyntax')
+  call b:func(0)
+  split
+  quit
+  edit
+  set filetype=markdown
+  execute "normal! i```vim\<cr>let g:a = 1\<cr>```"
+  call b:func(1)
+  AssertEqual SyntaxOf('g:a'), 'vimVar'
+
 Given markdown;
 ```a+b-
 code
-- 
2.39.5