Extract the client-side image map from dot, and use it to generate the
imagemap proper. Return the whole <map>..<img> combination,
suitable for inclusion on the page
# File lib/rdoc/diagram.rb, line 313
def wrap_in_image_map(src, dot)
res = ""
dot_map = `dot -Tismap #{src}`
if(!dot_map.empty?)
res << %{<map id="map" name="map">\n}
dot_map.split($/).each do |area|
unless area =~ /^rectangle \((\d+),(\d+)\) \((\d+),(\d+)\) ([\/\w.]+)\s*(.*)/
$stderr.puts "Unexpected output from dot:\n#{area}"
return nil
end
xs, ys = [$1.to_i, $3.to_i], [$2.to_i, $4.to_i]
url, area_name = $5, $6
res << %{ <area shape="rect" coords="#{xs.min},#{ys.min},#{xs.max},#{ys.max}" }
res << %{ href="#{url}" alt="#{area_name}" />\n}
end
res << "</map>\n"
end
res << %{<img src="#{dot}" usemap="#map" alt="#{dot}" />}
return res
end
