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require 'rexml/encoding'
require 'rexml/source'
module REXML
# NEEDS DOCUMENTATION
class XMLDecl < Child
include Encoding
DEFAULT_VERSION = "1.0";
DEFAULT_ENCODING = "UTF-8";
DEFAULT_STANDALONE = "no";
START = '<\?xml';
STOP = '\?>';
attr_accessor :version, :standalone
attr_reader :writeencoding, :writethis
def initialize(version=DEFAULT_VERSION, encoding=nil, standalone=nil)
@writethis = true
@writeencoding = !encoding.nil?
if version.kind_of? XMLDecl
super()
@version = version.version
self.encoding = version.encoding
@writeencoding = version.writeencoding
@standalone = version.standalone
else
super()
@version = version
self.encoding = encoding
@standalone = standalone
end
@version = DEFAULT_VERSION if @version.nil?
end
def clone
XMLDecl.new(self)
end
# indent::
# Ignored. There must be no whitespace before an XML declaration
# transitive::
# Ignored
# ie_hack::
# Ignored
def write(writer, indent=-1, transitive=false, ie_hack=false)
return nil unless @writethis or writer.kind_of? Output
writer << START.sub(/\\/u, '')
writer << " #{content encoding}"
writer << STOP.sub(/\\/u, '')
end
def ==( other )
other.kind_of?(XMLDecl) and
other.version == @version and
other.encoding == self.encoding and
other.standalone == @standalone
end
def xmldecl version, encoding, standalone
@version = version
self.encoding = encoding
@standalone = standalone
end
def node_type
:xmldecl
end
alias :stand_alone? :standalone
alias :old_enc= :encoding=
def encoding=( enc )
if enc.nil?
self.old_enc = "UTF-8"
@writeencoding = false
else
self.old_enc = enc
@writeencoding = true
end
self.dowrite
end
# Only use this if you do not want the XML declaration to be written;
# this object is ignored by the XML writer. Otherwise, instantiate your
# own XMLDecl and add it to the document.
#
# Note that XML 1.1 documents *must* include an XML declaration
def XMLDecl.default
rv = XMLDecl.new( "1.0" )
rv.nowrite
rv
end
def nowrite
@writethis = false
end
def dowrite
@writethis = true
end
def inspect
START.sub(/\\/u, '') + " ... " + STOP.sub(/\\/u, '')
end
private
def content(enc)
rv = "version='#@version'"
rv << " encoding='#{enc}'" if @writeencoding || enc !~ /\Autf-8\z/i
rv << " standalone='#@standalone'" if @standalone
rv
end
end
end
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