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require 'xmlscan/scanner'
module RSS
class XMLScanParser < BaseParser
private
def listener
XMLScanListener
end
def _parse
begin
XMLScan::XMLScanner.new(@listener).parse(@rss)
rescue XMLScan::Error => e
raise NotWellFormedError.new(e.lineno){e.message}
end
end
end
class XMLScanListener < BaseListener
include XMLScan::Visitor
include ListenerMixin
ENTITIES = {
'lt' => '<',
'gt' => '>',
'amp' => '&',
'quot' => '"',
'apos' => '\''
}
def on_xmldecl_version(str)
@version = str
end
def on_xmldecl_encoding(str)
@encoding = str
end
def on_xmldecl_standalone(str)
@standalone = str
end
def on_xmldecl_end
xmldecl(@version, @encoding, @standalone == "yes")
end
alias_method(:on_pi, :instruction)
alias_method(:on_chardata, :text)
alias_method(:on_cdata, :text)
def on_etag(name)
tag_end(name)
end
def on_entityref(ref)
text(ENTITIES[ref])
end
def on_charref(code)
text([code].pack('U'))
end
alias_method(:on_charref_hex, :on_charref)
def on_stag(name)
@attrs = {}
end
def on_attribute(name)
@attrs[name] = @current_attr = ''
end
def on_attr_value(str)
@current_attr << str
end
def on_attr_entityref(ref)
@current_attr << ENTITIES[ref]
end
def on_attr_charref(code)
@current_attr << [code].pack('U')
end
alias_method(:on_attr_charref_hex, :on_attr_charref)
def on_stag_end(name)
tag_start(name, @attrs)
end
def on_stag_end_empty(name)
tag_start(name, @attrs)
tag_end(name)
end
end
end
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