Scientific notation for floats is invalid in PDF

databasically · Nov 2, 2011 · 701aae0 · 701aae0
1 parent e4d0d0a
commit 701aae0
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Showing 2 changed files with 9 additions and 1 deletion.
diff --git a/lib/prawn/core/pdf_object.rb b/lib/prawn/core/pdf_object.rb
@@ -68,7 +68,13 @@ def PdfObject(obj, in_content_stream = false)
       when NilClass   then "null" 
       when TrueClass  then "true"
       when FalseClass then "false"
-      when Numeric    then String(obj)
+      when Numeric
+        if (str = String(obj)) =~ /e/i
+          # scientific notation is not supported in PDF
+          sprintf("%.16f", obj).gsub(/\.?0+\z/, "")
+        else
+          str
+        end
       when Array
         "[" << obj.map { |e| PdfObject(e, in_content_stream) }.join(' ') << "]"
       when Prawn::Core::LiteralString

diff --git a/spec/pdf_object_spec.rb b/spec/pdf_object_spec.rb
@@ -17,6 +17,8 @@
   it "should convert a Ruby number to PDF number" do
     Prawn::Core::PdfObject(1).should == "1"
     Prawn::Core::PdfObject(1.214112421).should == "1.214112421" 
+    # scientific notation is not valid in PDF
+    Prawn::Core::PdfObject(0.000005).should == "0.000005"
   end
 
   it "should convert a Ruby time object to a PDF timestamp" do