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Use tex syntax for inline math
[etc/vim.git] / syntax / markdown.vim
diff --git a/syntax/markdown.vim b/syntax/markdown.vim
index e36d08372deed5a307dd2d3c780e6f8ddff44008..9041ab17a3c686e26bf4cac7822d8903f3d3e557 100644 (file)
--- a/syntax/markdown.vim
+++ b/syntax/markdown.vim
@@ -36,7 +36,7 @@ syn sync linebreaks=1
 
 "additions to HTML groups
 syn region htmlItalic start="\\\@<!\*\S\@=" end="\S\@<=\\\@<!\*" keepend oneline
-syn region htmlItalic start="\(^\|\s\)\@<=_\|\\\@<!_\([^_]\+\s\)\@=" end="\S\@<=_\|_\S\@=" keepend oneline
+syn region htmlItalic start="\(^\|\s\)\@<=_\|\\\@<!_\([^_]\+\s\)\@=" end="\S\@<=[^\\]_\|[^\\]_\S\@=" keepend oneline
 syn region htmlBold start="\S\@<=\*\*\|\*\*\S\@=" end="\S\@<=\*\*\|\*\*\S\@=" keepend oneline
 syn region htmlBold start="\S\@<=__\|__\S\@=" end="\S\@<=__\|__\S\@=" keepend oneline
 syn region htmlBoldItalic start="\S\@<=\*\*\*\|\*\*\*\S\@=" end="\S\@<=\*\*\*\|\*\*\*\S\@=" keepend oneline
@@ -87,26 +87,27 @@ syn match  mkdRule         /^\s*-\{3,}$/
 syn match  mkdRule         /^\s*\*\{3,5}$/
 
 "HTML headings
-syn region htmlH1       start="^\s*#"                   end="\($\|#\+\)" contains=@Spell
-syn region htmlH2       start="^\s*##"                  end="\($\|#\+\)" contains=@Spell
-syn region htmlH3       start="^\s*###"                 end="\($\|#\+\)" contains=@Spell
-syn region htmlH4       start="^\s*####"                end="\($\|#\+\)" contains=@Spell
-syn region htmlH5       start="^\s*#####"               end="\($\|#\+\)" contains=@Spell
-syn region htmlH6       start="^\s*######"              end="\($\|#\+\)" contains=@Spell
+syn region htmlH1       start="^\s*#"                   end="$" contains=@Spell
+syn region htmlH2       start="^\s*##"                  end="$" contains=@Spell
+syn region htmlH3       start="^\s*###"                 end="$" contains=@Spell
+syn region htmlH4       start="^\s*####"                end="$" contains=@Spell
+syn region htmlH5       start="^\s*#####"               end="$" contains=@Spell
+syn region htmlH6       start="^\s*######"              end="$" contains=@Spell
 syn match  htmlH1       /^.\+\n=\+$/ contains=@Spell
 syn match  htmlH2       /^.\+\n-\+$/ contains=@Spell
 
-if get(g:, 'vim_markdown_math', 0)
-  syn region mkdMath matchgroup=mkdDelimiter start="\\\@<!\$" end="\$"
-  syn region mkdMath matchgroup=mkdDelimiter start="\\\@<!\$\$" end="\$\$"
-endif
-
 " YAML frontmatter
 if get(g:, 'vim_markdown_frontmatter', 0)
   syn include @yamlTop syntax/yaml.vim
   syn region Comment matchgroup=mkdDelimiter start="\%^---$" end="^---$" contains=@yamlTop
 endif
 
+if get(g:, 'vim_markdown_math', 0)
+  syn include @tex syntax/tex.vim
+  syn region mkdMath matchgroup=mkdDelimiter start="\\\@<!\$" end="\$" contains=@tex
+  syn region mkdMath matchgroup=mkdDelimiter start="\\\@<!\$\$" end="\$\$" contains=@tex
+endif
+
 syn cluster mkdNonListItem contains=htmlItalic,htmlBold,htmlBoldItalic,mkdFootnotes,mkdInlineURL,mkdLink,mkdLinkDef,mkdLineBreak,mkdBlockquote,mkdCode,mkdIndentCode,mkdListItem,mkdRule,htmlH1,htmlH2,htmlH3,htmlH4,htmlH5,htmlH6,mkdMath
 
 "highlighting for Markdown groups
vim configuration

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