Add 'g:vim_markdown_fenced_languages' option

Users can set filetype map in `.vimrc` for fenced code block
syntax highlighting.
Based on the patch by @citizenmatt.
Fix #250

diff --git a/README.md b/README.md
index 014c54ea0326bb2f0302ff1179a98cc12e766faa..c265d5bf7b4a93f622d81c666ddc33d914d080b5 100644 (file)
--- a/README.md
+++ b/README.md
@@ -139,6 +139,23 @@ To disable conceal regardless of `conceallevel` setting, add the following to yo
 let g:vim_markdown_conceal = 0
 ```
 
+### Fenced code block languages
+
+You can use filetype name as fenced code block languages for syntax highlighting.
+If you want to use different name from filetype, you can add it in your '.vimrc' like so:
+
+```vim
+let g:vim_markdown_fenced_languages = ['csharp=cs']
+```
+
+This will cause the following to be highlighted using the `cs` filetype syntax.
+
+    ```csharp
+    ...
+    ```
+
+Default is `['c++=cpp', 'viml=vim', 'bash=sh', 'ini=dosini']`.
+
 ### Syntax extensions
 
 The following options control which syntax extensions will be turned on. They are off by default.

diff --git a/doc/vim-markdown.txt b/doc/vim-markdown.txt
index d1922b70c1e76187e49f71e5d9be3eb4bcce9da4..6e486deb6e35b976399b43ba9cf0930faaa70605 100644 (file)
--- a/doc/vim-markdown.txt
+++ b/doc/vim-markdown.txt
@@ -14,7 +14,8 @@ Contents ~
   6. Text emphasis restriction to single-lines
                        |vim-markdown-text-emphasis-restriction-to-single-lines|
   7. Syntax Concealing                         |vim-markdown-syntax-concealing|
-  8. Syntax extensions                         |vim-markdown-syntax-extensions|
+  8. Fenced code block languages     |vim-markdown-fenced-code-block-languages|
+  9. Syntax extensions                         |vim-markdown-syntax-extensions|
    1. LaTeX math                                      |vim-markdown-latex-math|
    2. YAML Front Matter                        |vim-markdown-yaml-front-matter|
    3. TOML Front Matter                        |vim-markdown-toml-front-matter|
@@ -151,6 +152,24 @@ your '.vimrc':
 >
   let g:vim_markdown_conceal = 0
 <
+-------------------------------------------------------------------------------
+                                     *vim-markdown-fenced-code-block-languages*
+Fenced code block languages ~
+
+You can use filetype name as fenced code block languages for syntax
+highlighting. If you want to use different name from filetype, you can add it
+in your '.vimrc' like so:
+>
+  let g:vim_markdown_fenced_languages = ['csharp=cs']
+<
+This will cause the following to be highlighted using the 'cs' filetype syntax.
+>
+  ```csharp
+  ...
+  ```
+<
+Default is "['c++=cpp', 'viml=vim', 'bash=sh', 'ini=dosini']".
+
 -------------------------------------------------------------------------------
                                                *vim-markdown-syntax-extensions*
 Syntax extensions ~

diff --git a/ftplugin/markdown.vim b/ftplugin/markdown.vim
index c7832d75d010d8761d4a6bee3558eaea9c06cc9b..e189ec4fce262bfa439d1c5a2272f03ad5fd58f7 100644 (file)
--- a/ftplugin/markdown.vim
+++ b/ftplugin/markdown.vim
@@ -614,12 +614,21 @@ 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/
-let s:filetype_dict = {
-    \ 'c++': 'cpp',
-    \ 'viml': 'vim',
-    \ 'bash': 'sh',
-    \ 'ini': 'dosini'
-\ }
+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.

diff --git a/test/syntax.vader b/test/syntax.vader
index d2dbb13cf2714a391baa82e40b97d20732e85033..98548a0562ceef7e26ad8aab09c2ff3d0f34149c 100644 (file)
--- a/test/syntax.vader
+++ b/test/syntax.vader
@@ -424,6 +424,19 @@ Execute (fenced code block syntax with alias language specifier):
   AssertEqual SyntaxOf('g:a'), 'vimVar'
   AssertEqual SyntaxOf('g:b'), 'vimVar'
 
+Given markdown;
+```csharp
+var s = "foo";
+```
+
+Execute (fenced code block languages setting):
+  let g:vim_markdown_fenced_languages = ['csharp=cs']
+  source ../ftplugin/markdown.vim
+  let b:func = Markdown_GetFunc('vim-markdown/ftplugin/markdown.vim', 'MarkdownRefreshSyntax')
+  call b:func(0)
+  AssertEqual SyntaxOf('foo'), 'csString'
+  unlet g:vim_markdown_fenced_languages
+
 Given markdown;
 ```a+b-
 code