Skip to content

@gunshor /gfm.rb forked from mojombo/gfm.rb
Created

Embed URL

HTTPS clone URL

Subversion checkout URL

You can clone with
or
.
Download ZIP
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] == '__'
end
# in very clear cases, let newlines become <br /> tags
text.gsub!(/^[\w\<][^\n]*\n+/) do |x|
x =~ /\n{2}/ ? x : (x.strip!; x << " \n")
end
# Insert pre block extractions
text.gsub!(/\{gfm-extraction-([0-9a-f]{32})\}/) do
"\n\n" + extractions[$1]
end
text
end
if $0 == __FILE__
require 'test/unit'
require 'shoulda'
class GFMTest < Test::Unit::TestCase
context "GFM" do
should "not touch single underscores inside words" do
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 "\n\n<pre>\nfoo_bar_baz\n</pre>", gfm("<pre>\nfoo_bar_baz\n</pre>")
end
should "not treat pre blocks with pre-text differently" do
a = "\n\n<pre>\nthis is `a\\_test` and this\\_too\n</pre>"
b = "hmm<pre>\nthis is `a\\_test` and this\\_too\n</pre>"
assert_equal gfm(a)[2..-1], gfm(b)[3..-1]
end
should "escape two or more underscores inside words" do
assert_equal "foo\\_bar\\_baz", gfm("foo_bar_baz")
end
should "turn newlines into br tags in simple cases" do
assert_equal "foo \nbar", gfm("foo\nbar")
end
should "convert newlines in all groups" do
assert_equal "apple \npear \norange\n\nruby \npython \nerlang",
gfm("apple\npear\norange\n\nruby\npython\nerlang")
end
should "convert newlines in even long groups" do
assert_equal "apple \npear \norange \nbanana\n\nruby \npython \nerlang",
gfm("apple\npear\norange\nbanana\n\nruby\npython\nerlang")
end
should "not convert newlines in lists" do
assert_equal "# foo\n# bar", gfm("# foo\n# bar")
assert_equal "* foo\n* bar", gfm("* foo\n* bar")
end
end
end
end
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Something went wrong with that request. Please try again.