From 858362e761a41e7d96efbcb9b38ae815b1e388d7 Mon Sep 17 00:00:00 2001
From: drbrain <drbrain@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Thu, 25 Sep 2008 02:43:03 +0000
Subject: Import RDoc 2.2.1 r185

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@19537 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 lib/rdoc/diagram.rb | 32 +++++++++++++++++---------------
 1 file changed, 17 insertions(+), 15 deletions(-)

(limited to 'lib/rdoc/diagram.rb')

diff --git a/lib/rdoc/diagram.rb b/lib/rdoc/diagram.rb
index e235e043dc..4aa2ec5656 100644
--- a/lib/rdoc/diagram.rb
+++ b/lib/rdoc/diagram.rb
@@ -311,28 +311,30 @@ module RDoc
     # inclusion on the page
 
     def wrap_in_image_map(src, dot)
-      res = %{<map id="map" name="map">\n}
+      res = ""
       dot_map = `dot -Tismap #{src}`
-      dot_map.split($/).each do |area|
-        unless area =~ /^rectangle \((\d+),(\d+)\) \((\d+),(\d+)\) ([\/\w.]+)\s*(.*)/
-          $stderr.puts "Unexpected output from dot:\n#{area}"
-          return nil
-        end
+      
+      if(!dot_map.empty?)
+        res << %{<map id="map" name="map">\n}
+        dot_map.split($/).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
+          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}
+          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 << "</map>\n"
-#      map_file = src.sub(/.dot/, '.map')
-#      system("dot -Timap #{src} -o #{map_file}")
-      res << %{<img src="#{dot}" usemap="#map" border="0" alt="#{dot}">}
+
+      res << %{<img src="#{dot}" usemap="#map" alt="#{dot}" />}
       return res
     end
 
   end
 
 end
-
-- 
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