Fresh start

1 files changed, 394 insertions, 0 deletions

diff --git a/jni/ruby/lib/rexml/functions.rb b/jni/ruby/lib/rexml/functions.rb
new file mode 100644
index 0000000..2010be1
--- /dev/null
+++ b/jni/ruby/lib/rexml/functions.rb
@@ -0,0 +1,394 @@
+module REXML
+  # If you add a method, keep in mind two things:
+  # (1) the first argument will always be a list of nodes from which to
+  # filter.  In the case of context methods (such as position), the function
+  # should return an array with a value for each child in the array.
+  # (2) all method calls from XML will have "-" replaced with "_".
+  # Therefore, in XML, "local-name()" is identical (and actually becomes)
+  # "local_name()"
+  module Functions
+    @@context = nil
+    @@namespace_context = {}
+    @@variables = {}
+
+    def Functions::namespace_context=(x) ; @@namespace_context=x ; end
+    def Functions::variables=(x) ; @@variables=x ; end
+    def Functions::namespace_context ; @@namespace_context ; end
+    def Functions::variables ; @@variables ; end
+
+    def Functions::context=(value); @@context = value; end
+
+    def Functions::text( )
+      if @@context[:node].node_type == :element
+        return @@context[:node].find_all{|n| n.node_type == :text}.collect{|n| n.value}
+      elsif @@context[:node].node_type == :text
+        return @@context[:node].value
+      else
+        return false
+      end
+    end
+
+    # Returns the last node of the given list of nodes.
+    def Functions::last( )
+      @@context[:size]
+    end
+
+    def Functions::position( )
+      @@context[:index]
+    end
+
+    # Returns the size of the given list of nodes.
+    def Functions::count( node_set )
+      node_set.size
+    end
+
+    # Since REXML is non-validating, this method is not implemented as it
+    # requires a DTD
+    def Functions::id( object )
+    end
+
+    # UNTESTED
+    def Functions::local_name( node_set=nil )
+      get_namespace( node_set ) do |node|
+        return node.local_name
+      end
+    end
+
+    def Functions::namespace_uri( node_set=nil )
+      get_namespace( node_set ) {|node| node.namespace}
+    end
+
+    def Functions::name( node_set=nil )
+      get_namespace( node_set ) do |node|
+        node.expanded_name
+      end
+    end
+
+    # Helper method.
+    def Functions::get_namespace( node_set = nil )
+      if node_set == nil
+        yield @@context[:node] if defined? @@context[:node].namespace
+      else
+        if node_set.respond_to? :each
+          node_set.each { |node| yield node if defined? node.namespace }
+        elsif node_set.respond_to? :namespace
+          yield node_set
+        end
+      end
+    end
+
+    # A node-set is converted to a string by returning the string-value of the
+    # node in the node-set that is first in document order. If the node-set is
+    # empty, an empty string is returned.
+    #
+    # A number is converted to a string as follows
+    #
+    # NaN is converted to the string NaN
+    #
+    # positive zero is converted to the string 0
+    #
+    # negative zero is converted to the string 0
+    #
+    # positive infinity is converted to the string Infinity
+    #
+    # negative infinity is converted to the string -Infinity
+    #
+    # if the number is an integer, the number is represented in decimal form
+    # as a Number with no decimal point and no leading zeros, preceded by a
+    # minus sign (-) if the number is negative
+    #
+    # otherwise, the number is represented in decimal form as a Number
+    # including a decimal point with at least one digit before the decimal
+    # point and at least one digit after the decimal point, preceded by a
+    # minus sign (-) if the number is negative; there must be no leading zeros
+    # before the decimal point apart possibly from the one required digit
+    # immediately before the decimal point; beyond the one required digit
+    # after the decimal point there must be as many, but only as many, more
+    # digits as are needed to uniquely distinguish the number from all other
+    # IEEE 754 numeric values.
+    #
+    # The boolean false value is converted to the string false. The boolean
+    # true value is converted to the string true.
+    #
+    # An object of a type other than the four basic types is converted to a
+    # string in a way that is dependent on that type.
+    def Functions::string( object=nil )
+      #object = @context unless object
+      if object.instance_of? Array
+        string( object[0] )
+      elsif defined? object.node_type
+        if object.node_type == :attribute
+          object.value
+        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
+
+    # A node-set is converted to a string by
+    # returning the concatenation of the string-value
+    # of each of the children of the node in the
+    # node-set that is first in document order.
+    # If the node-set is empty, an empty string is returned.
+    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
+    end
+
+    # Fixed by Mike Stok
+    def Functions::starts_with( string, test )
+      string(string).index(string(test)) == 0
+    end
+
+    # Fixed by Mike Stok
+    def Functions::contains( string, test )
+      string(string).include?(string(test))
+    end
+
+    # Kouhei fixed this
+    def Functions::substring_before( string, test )
+      ruby_string = string(string)
+      ruby_index = ruby_string.index(string(test))
+      if ruby_index.nil?
+        ""
+      else
+        ruby_string[ 0...ruby_index ]
+      end
+    end
+
+    # Kouhei fixed this too
+    def Functions::substring_after( string, test )
+      ruby_string = string(string)
+      return $1 if ruby_string =~ /#{test}(.*)/
+      ""
+    end
+
+    # Take equal portions of Mike Stok and Sean Russell; mix
+    # vigorously, and pour into a tall, chilled glass.  Serves 10,000.
+    def Functions::substring( string, start, length=nil )
+      ruby_string = string(string)
+      ruby_length = if length.nil?
+                      ruby_string.length.to_f
+                    else
+                      number(length)
+                    end
+      ruby_start = number(start)
+
+      # Handle the special cases
+      return '' if (
+        ruby_length.nan? or
+        ruby_start.nan? or
+        ruby_start.infinite?
+      )
+
+      infinite_length = ruby_length.infinite? == 1
+      ruby_length = ruby_string.length if infinite_length
+
+      # Now, get the bounds.  The XPath bounds are 1..length; the ruby bounds
+      # are 0..length.  Therefore, we have to offset the bounds by one.
+      ruby_start = ruby_start.round - 1
+      ruby_length = ruby_length.round
+
+      if ruby_start < 0
+       ruby_length += ruby_start unless infinite_length
+       ruby_start = 0
+      end
+      return '' if ruby_length <= 0
+      ruby_string[ruby_start,ruby_length]
+    end
+
+    # UNTESTED
+    def Functions::string_length( string )
+      string(string).length
+    end
+
+    # UNTESTED
+    def Functions::normalize_space( string=nil )
+      string = string(@@context[:node]) if string.nil?
+      if string.kind_of? Array
+        string.collect{|x| string.to_s.strip.gsub(/\s+/um, ' ') if string}
+      else
+        string.to_s.strip.gsub(/\s+/um, ' ')
+      end
+    end
+
+    # This is entirely Mike Stok's beast
+    def Functions::translate( string, tr1, tr2 )
+      from = string(tr1)
+      to = string(tr2)
+
+      # the map is our translation table.
+      #
+      # if a character occurs more than once in the
+      # from string then we ignore the second &
+      # subsequent mappings
+      #
+      # if a character maps to nil then we delete it
+      # in the output.  This happens if the from
+      # string is longer than the to string
+      #
+      # there's nothing about - or ^ being special in
+      # http://www.w3.org/TR/xpath#function-translate
+      # so we don't build ranges or negated classes
+
+      map = Hash.new
+      0.upto(from.length - 1) { |pos|
+        from_char = from[pos]
+        unless map.has_key? from_char
+          map[from_char] =
+          if pos < to.length
+            to[pos]
+          else
+            nil
+          end
+        end
+      }
+
+      if ''.respond_to? :chars
+        string(string).chars.collect { |c|
+          if map.has_key? c then map[c] else c end
+        }.compact.join
+      else
+        string(string).unpack('U*').collect { |c|
+          if map.has_key? c then map[c] else c end
+        }.compact.pack('U*')
+      end
+    end
+
+    # UNTESTED
+    def Functions::boolean( object=nil )
+      if object.kind_of? String
+        if object =~ /\d+/u
+          return object.to_f != 0
+        else
+          return object.size > 0
+        end
+      elsif object.kind_of? Array
+        object = object.find{|x| x and true}
+      end
+      return object ? true : false
+    end
+
+    # UNTESTED
+    def Functions::not( object )
+      not boolean( object )
+    end
+
+    # UNTESTED
+    def Functions::true( )
+      true
+    end
+
+    # UNTESTED
+    def Functions::false(  )
+      false
+    end
+
+    # UNTESTED
+    def Functions::lang( language )
+      lang = false
+      node = @@context[:node]
+      attr = nil
+      until node.nil?
+        if node.node_type == :element
+          attr = node.attributes["xml:lang"]
+          unless attr.nil?
+            lang = compare_language(string(language), attr)
+            break
+          else
+          end
+        end
+        node = node.parent
+      end
+      lang
+    end
+
+    def Functions::compare_language lang1, lang2
+      lang2.downcase.index(lang1.downcase) == 0
+    end
+
+    # a string that consists of optional whitespace followed by an optional
+    # minus sign followed by a Number followed by whitespace is converted to
+    # the IEEE 754 number that is nearest (according to the IEEE 754
+    # round-to-nearest rule) to the mathematical value represented by the
+    # string; any other string is converted to NaN
+    #
+    # boolean true is converted to 1; boolean false is converted to 0
+    #
+    # a node-set is first converted to a string as if by a call to the string
+    # function and then converted in the same way as a string argument
+    #
+    # an object of a type other than the four basic types is converted to a
+    # number in a way that is dependent on that type
+    def Functions::number( object=nil )
+      object = @@context[:node] unless object
+      case object
+      when true
+        Float(1)
+      when false
+        Float(0)
+      when Array
+        number(string( object ))
+      when Numeric
+        object.to_f
+      else
+        str = string( object )
+        # 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)
+        end
+      end
+    end
+
+    def Functions::sum( nodes )
+      nodes = [nodes] unless nodes.kind_of? Array
+      nodes.inject(0) { |r,n| r + number(string(n)) }
+    end
+
+    def Functions::floor( number )
+      number(number).floor
+    end
+
+    def Functions::ceiling( number )
+      number(number).ceil
+    end
+
+    def Functions::round( number )
+      begin
+        number(number).round
+      rescue FloatDomainError
+        number(number)
+      end
+    end
+
+    def Functions::processing_instruction( node )
+      node.node_type == :processing_instruction
+    end
+
+    def Functions::method_missing( id )
+      puts "METHOD MISSING #{id.id2name}"
+      XPath.match( @@context[:node], id.id2name )
+    end
+  end
+end