@@ -1,4 +1,14 @@ +require 'digest/md5' + def gfm(text) + # Extract pre blocks + extractions = {} + text.gsub!(%r{<pre>.*?</pre>}m) do |match| + md5 = Digest::MD5.hexdigest(match) + extractions[md5] = match + "{gfm-extraction-#{md5}}" + end + # prevent foo_bar_baz from ending up with an italic word in the middle text.gsub!(/(^(?! {4}|\t)\w+_\w+_\w[\w_]*)/) do |x| x.gsub('_', '\_') if x.split('').sort.to_s[0..1] == '__' @@ -9,6 +19,11 @@ def gfm(text) x.gsub(/^(.+)$/, "\\1 ") end + # Insert pre block extractions + text.gsub!(/\{gfm-extraction-([0-9a-f]{32})\}/) do + extractions[$1] + end + text end @@ -22,6 +37,14 @@ if $0 == __FILE__ assert_equal "foo_bar", gfm("foo_bar") end + should "not touch underscores in code blocks" do + assert_equal " foo_bar_baz", gfm(" foo_bar_baz") + end + + should "not touch underscores in pre blocks" do + assert_equal "<pre>\nfoo_bar_baz\n</pre>", gfm("<pre>\nfoo_bar_baz\n</pre>") + end + should "escape two or more underscores inside words" do assert_equal "foo\\_bar\\_baz", gfm("foo_bar_baz") end code.rb 5be9a3e94f39b42a3a8d4a4c7f44c9472a800431 Tom Preston-Werner tom@mojombo.com http://github.com/github/github-flavored-markdown/commit/a28709dfc97cfec9ca7909f014562e644344b167 a28709dfc97cfec9ca7909f014562e644344b167 2009-06-08T11:53:40-07:00 2009-06-08T11:53:40-07:00 ignore pre blocks cda4b1f339b994be70b55470f119c7bd0ab58307 Tom Preston-Werner tom@mojombo.com