Simplify expression for single-line emphasis

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

diff --git a/syntax/markdown.vim b/syntax/markdown.vim
index 05cf75106fa364daeba8d82ecedc0d030cf06864..ee954e0798b0e265d4e44fd12b80f7efc02d82c1 100644 (file)
--- a/syntax/markdown.vim
+++ b/syntax/markdown.vim
@@ -42,12 +42,17 @@ if has('conceal')
 endif
 
 "additions to HTML groups
-syn region htmlItalic start="\%(^\|\s\)\zs\*\ze[^\\\*\t ]" end="[^\\\*\t ]\zs\*\ze\_W" keepend
-syn region htmlItalic start="\%(^\|\s\)\zs_\ze[^\\_\t ]" end="[^\\_\t ]\zs_\ze\_W" keepend
-syn region htmlBold start="\*\*\ze\S" end="\S\zs\*\*" keepend
-syn region htmlBold start="__\ze\S" end="\S\zs__" keepend
-syn region htmlBoldItalic start="\*\*\*\ze\S" end="\S\zs\*\*\*" keepend
-syn region htmlBoldItalic start="___\ze\S" end="\S\zs___" keepend
+if get(g:, "vim_markdown_emphasis_multiline", 1)
+    let oneline = ""
+else
+    let oneline = " oneline"
+endif
+execute 'syn region htmlItalic start="\%(^\|\s\)\zs\*\ze[^\\\*\t ]" end="[^\\\*\t ]\zs\*\ze\_W" keepend' . oneline
+execute 'syn region htmlItalic start="\%(^\|\s\)\zs_\ze[^\\_\t ]" end="[^\\_\t ]\zs_\ze\_W" keepend' . oneline
+execute 'syn region htmlBold start="\*\*\ze\S" end="\S\zs\*\*" keepend' . oneline
+execute 'syn region htmlBold start="__\ze\S" end="\S\zs__" keepend' . oneline
+execute 'syn region htmlBoldItalic start="\*\*\*\ze\S" end="\S\zs\*\*\*" keepend' . oneline
+execute 'syn region htmlBoldItalic start="___\ze\S" end="\S\zs___" keepend' . oneline
 
 " [link](URL) | [link][id] | [link][] | ![image](URL)
 syn region mkdFootnotes matchgroup=mkdDelimiter start="\[^"    end="\]"
@@ -88,11 +93,11 @@ syn match  mkdLineBreak    /  \+$/
 syn region mkdBlockquote   start=/^\s*>/                   end=/$/ contains=mkdLineBreak,@Spell
 syn region mkdCode         start=/\(\([^\\]\|^\)\\\)\@<!`/ end=/\(\([^\\]\|^\)\\\)\@<!`/
 syn region mkdCode         start=/\s*``[^`]*/              end=/[^`]*``\s*/
-syn region mkdCode         start=/^\s*\z(`\{3,}\)\s*[0-9A-Za-z_+-]*\s*$/          end=/^\s*\z1`*\s*$/
-syn region mkdCode         start=/\s*\~\~[^\~]*/              end=/[^\~]*\~\~\s*/
+syn region mkdCode         start=/^\s*\z(`\{3,}\)[^`]*$/   end=/^\s*\z1`*\s*$/
+syn region mkdCode         start=/\s*\~\~[^\~]*/           end=/[^\~]*\~\~\s*/
 syn region mkdCode         start=/^\s*\z(\~\{3,}\)\s*[0-9A-Za-z_+-]*\s*$/         end=/^\s*\z1\~*\s*$/
-syn region mkdCode         start="<pre[^>]*>"              end="</pre>"
-syn region mkdCode         start="<code[^>]*>"             end="</code>"
+syn region mkdCode         start="<pre[^>]*\\\@<!>"        end="</pre>"
+syn region mkdCode         start="<code[^>]*\\\@<!>"       end="</code>"
 syn region mkdFootnote     start="\[^"                     end="\]"
 syn match  mkdCode         /^\s*\n\(\(\s\{8,}[^ ]\|\t\t\+[^\t]\).*\n\)\+/
 syn match  mkdCode         /\%^\(\(\s\{4,}[^ ]\|\t\+[^\t]\).*\n\)\+/
@@ -124,9 +129,13 @@ if get(g:, 'vim_markdown_toml_frontmatter', 0)
 endif
 
 if get(g:, 'vim_markdown_json_frontmatter', 0)
-  syn include @jsonTop syntax/json.vim
-  syn region Comment matchgroup=mkdDelimiter start="\%^{$" end="^}$" contains=@jsonTop
-  unlet! b:current_syntax
+  try
+    syn include @jsonTop syntax/json.vim
+    syn region Comment matchgroup=mkdDelimiter start="\%^{$" end="^}$" contains=@jsonTop
+    unlet! b:current_syntax
+  catch /E484/
+    syn region Comment matchgroup=mkdDelimiter start="\%^{$" end="^}$"
+  endtry
 endif
 
 if get(g:, 'vim_markdown_math', 0)