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# frozen_string_literal: false
require 'rexml/parsers/streamparser'
require 'rexml/parsers/baseparser'
module REXML
module Parsers
class UltraLightParser
def initialize stream
@stream = stream
@parser = REXML::Parsers::BaseParser.new( stream )
end
def add_listener( listener )
@parser.add_listener( listener )
end
def rewind
@stream.rewind
@parser.stream = @stream
end
def parse
root = context = []
while true
event = @parser.pull
case event[0]
when :end_document
break
when :end_doctype
context = context[1]
when :start_element, :start_doctype
context << event
event[1,0] = [context]
context = event
when :end_element
context = context[1]
else
context << event
end
end
root
end
end
# An element is an array. The array contains:
# 0 The parent element
# 1 The tag name
# 2 A hash of attributes
# 3..-1 The child elements
# An element is an array of size > 3
# Text is a String
# PIs are [ :processing_instruction, target, data ]
# Comments are [ :comment, data ]
# DocTypes are DocType structs
# The root is an array with XMLDecls, Text, DocType, Array, Text
end
end