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#! /usr/local/bin/ruby
## Visitor test
## 1998 by yoshidam
##
## This sample comes from Ken MacLeod's sample of XML-Grove-0.05
## Copyright (C) 1998 Ken MacLeod
require 'xml/dom/builder'
require 'xml/dom/visitor'
class MyHTML<XML::DOM::Visitor
def visit_Document(document, *rest)
document.children_accept_name(self, *rest)
end
def visit_Element(element, *rest)
raise "visit_Element called while using accept_name??\n"
end
def visit_EntityReference(eref, *rest)
print "&#{eref.nodeName};"
end
def visit_Text(text, *rest)
print text.nodeValue
end
def visit_name_DATE(element, *rest)
print Time.new.to_s.gsub!(/ /, " ")
end
def visit_name_PERL(element, *rest)
print "I cannot execute Perl scripts!!\n"
end
def visit_name_RUBY(element, *rest)
script = ''
element.childNodes.each do |node|
script += node.nodeValue
end
begin
eval(script)
rescue
print "Ruby error: #{$!}"
end
end
def method_missing(mid, *rest)
if mid.id2name =~ /^visit_name_(.+)$/
name = $1
element = rest.shift
print "<#{name}>"
element.children_accept_name(self, *rest)
print "</#{name}>"
else
raise NameError.new("undefined method `#{mid.id2name}' " +
"for #{self.inspect}")
end
end
end
doc = XML::DOM::Builder.new.parse($<.read)
doc.accept_name(MyHTML.new, [])
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