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Merge pull request #379 from pipex/latex-dollar-sign

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[New] Support `$` and `$$` as formula delimiters.
This commit is contained in:
bootstraponline
2012-06-19 13:22:49 -07:00
parent 9c40cbea76 f9cd97edaa
commit b53c961db2
1 changed files with 14 additions and 1 deletions
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lib/gollum/markup.rb
+14 -1
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@@ -124,17 +124,30 @@ module Gollum
# #
# Returns the placeholder'd String data. # Returns the placeholder'd String data.
def extract_tex(data) def extract_tex(data)
# Random string to escape the `$` character (might be overkill)
esc = "/%%/"
data.gsub(/\\\[\s*(.*?)\s*\\\]/m) do data.gsub(/\\\[\s*(.*?)\s*\\\]/m) do
tag = CGI.escapeHTML($1) tag = CGI.escapeHTML($1)
id = Digest::SHA1.hexdigest(tag) id = Digest::SHA1.hexdigest(tag)
@texmap[id] = [:block, tag] @texmap[id] = [:block, tag]
id id
end.gsub(/'\$/, esc). # Replace `'$` with the `esc` string in order to escape it
gsub(/\$\$\s*(.*?)\s*\$\$/m) do
tag = CGI.escapeHTML($1)
id = Digest::SHA1.hexdigest(tag)
@texmap[id] = [:block, tag]
id
end.gsub(/\\\(\s*(.*?)\s*\\\)/m) do end.gsub(/\\\(\s*(.*?)\s*\\\)/m) do
tag = CGI.escapeHTML($1) tag = CGI.escapeHTML($1)
id = Digest::SHA1.hexdigest(tag) id = Digest::SHA1.hexdigest(tag)
@texmap[id] = [:inline, tag] @texmap[id] = [:inline, tag]
id id
end end.gsub(/\$\s*(.*?)\s*\$/m) do # match inline $<formula>$
tag = CGI.escapeHTML($1)
id = Digest::SHA1.hexdigest(tag)
@texmap[id] = [:inline, tag]
id
end.gsub(/#{esc}/, '$') # replace the `esc` string back to `$`
end end
# Process all TeX from the texmap and replace the placeholders with the # Process all TeX from the texmap and replace the placeholders with the