Merged from REXML main repository:

Fixes ticket:68.
  NOTE that this involves an API change!  Entity declarations in the doctype
  now generate events that carry two, not one, arguments.

Implements ticket:15, using gwrite's suggestion.  This allows Element to be
subclassed.

Two unrelated changes, because subversion is retarded and doesn't do
block-level commits:

  1) Fixed a typo bug in previous change for ticket:15
  2) Fixed namespaces handling in XPath and element.  

    ***** Note that this is an API change!!! *****

    Element.namespaces() now returns a hash of namespace mappings which are
    relevant for that node.

Fixes a bug in multiple decodings

The changeset 1230:1231 was bad.  The default behavior is *not* to use the
native REXML encodings by default, but rather to use ICONV by default.  I know
that this will piss some people off, but defaulting to the pure Ruby version
isn't the correct solution, and it breaks other encodings, so I've reverted it.

* Fixes ticket:61 (xpath_parser)
* Fixes ticket:63 (UTF-16; UNILE decoding was bad)
* Cleans up some tests, removing opportunities for test corruption
* Improves parsing error messages a little
* Adds the ability to override the encoding detection in Source construction
* Fixes an edge case in Functions::string, where document nodes weren't 
  correctly converted
* Fixes Functions::string() for Element and Document nodes
* Fixes some problems in entity handling

Addresses ticket:66

Fixes ticket:71

Addresses ticket:78
  NOTE: that this also fixes what is technically another bug in REXML.  REXML's
  XPath parser used to allow exponential notation in numbers.  The XPath spec
  is specific about what a number is, and scientific notation is not included.
  Therefore, this has been fixed.

Cross-ported a fix for ticket:88 from CVS.

Fixes ticket:80

Documentation cleanup.  Ticket:84

Applied Kou's fix for an un-trac'ed bug.

------------------------------------------------------------------------


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@11548 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/rexml/functions.rb

@@ -117,16 +117,30 @@ module REXML
       elsif defined? object.node_type
         if object.node_type == :attribute
           object.value
-        elsif object.node_type == :element
-          object.text
+        elsif object.node_type == :element || object.node_type == :document
+          string_value(object)
         else
           object.to_s
         end
+      elsif object.nil?
+        return ""
       else
         object.to_s
       end
     end
 
+    def Functions::string_value( o )
+      rv = ""
+      o.children.each { |e|
+        if e.node_type == :text
+          rv << e.to_s
+        elsif e.node_type == :element
+          rv << string_value( e )
+        end
+      }
+      rv
+    end
+
     # UNTESTED
     def Functions::concat( *objects )
       objects.join
@@ -139,7 +153,7 @@ module REXML
 
     # Fixed by Mike Stok
     def Functions::contains( string, test )
-      string(string).include? string(test)
+      string(string).include?(string(test))
     end
 
     # Kouhei fixed this 
@@ -325,8 +339,9 @@ module REXML
         object.to_f
       else
         str = string( object )
-        #puts "STRING OF #{object.inspect} = #{str}"
-        if str =~ /^-?\.?\d/
+        # If XPath ever gets scientific notation...
+        #if str =~ /^\s*-?(\d*\.?\d+|\d+\.)([Ee]\d*)?\s*$/
+        if str =~ /^\s*-?(\d*\.?\d+|\d+\.)\s*$/
           str.to_f
         else
           (0.0 / 0.0)