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Contents
# ~*~ encoding: utf-8 ~*~
require 'net/http'
require 'uri'
require 'open-uri'
# Web Sequence Diagrams
#
# Render an inline web sequence diagram by sending the WSD code through the
# online renderer available from www.websequencediagrams.com.
#
class Gollum::Filter::WSD < Gollum::Filter
WSD_URL = "http://www.websequencediagrams.com/index.php"
# Extract all sequence diagram blocks into the map and replace with
# placeholders.
def extract(data)
return data if @markup.format == :txt
data.gsub(/^\{\{\{\{\{\{ ?(.+?)\r?\n(.+?)\r?\n\}\}\}\}\}\}\r?$/m) do
id = Digest::SHA1.hexdigest(Regexp.last_match[2])
@map[id] = { :style => Regexp.last_match[1], :code => Regexp.last_match[2] }
id
end
end
# Process all diagrams from the map and replace the placeholders with
# the final HTML.
#
# data - The String data (with placeholders).
#
# Returns the marked up String data.
def process(data)
@map.each do |id, spec|
data.gsub!(id) do
render_wsd(spec[:code], spec[:style])
end
end
data
end
private
# Render the sequence diagram on the remote server.
#
# Returns an <img> tag to the rendered image, or an HTML error.
def render_wsd(code, style)
response = Net::HTTP.post_form(URI.parse(WSD_URL), 'style' => style, 'message' => code)
if response.body =~ /img: "(.+)"/
url = "//www.websequencediagrams.com/#{Regexp.last_match[1]}"
"<img src=\"#{url}\" />"
else
puts response.body
html_error("Sorry, unable to render sequence diagram at this time.")
end
end
end
Version data entries
37 entries across 37 versions & 2 rubygems