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Contents
# This file is part of the "Utopia Framework" project, and is licensed under the GNU AGPLv3.
# Copyright 2010 Samuel Williams. All rights reserved.
# See <utopia.rb> for licensing details.
require 'utopia/tag'
module Utopia
module XNode
OPENED_TAG = 0
CLOSED_TAG = 1
class UnbalancedTagError < StandardError
def initialize(scanner, start_pos, current_tag, closing_tag)
@scanner = scanner
@start_pos = start_pos
@current_tag = current_tag
@closing_tag = closing_tag
@starting_line = @scanner.calculate_line_number(@start_pos)
@ending_line = @scanner.calculate_line_number
end
def to_s
"UnbalancedTagError: Tag #{@current_tag} (line #{@starting_line[0]}: #{@starting_line[4]}) has been closed by #{@closing_tag} (line #{@ending_line[0]}: #{@ending_line[4]})."
end
end
class Processor
def initialize(content, delegate, options = {})
@delegate = delegate
@stack = []
@scanner = (options[:scanner] || Scanner).new(self, content)
end
def parse
@scanner.parse
end
def cdata(text)
@delegate.cdata(text)
end
def comment(text)
cdata("<!#{text}>")
end
def begin_tag(tag_name, begin_tag_type)
if begin_tag_type == OPENED_TAG
@stack << [Tag.new(tag_name, {}), @scanner.pos]
else
cur, pos = @stack.pop
if (tag_name != cur.name)
raise UnbalancedTagError.new(@scanner, pos, cur.name, tag_name)
end
@delegate.tag_end(cur)
end
end
def finish_tag(begin_tag_type, end_tag_type)
if begin_tag_type == OPENED_TAG # <...
if end_tag_type == CLOSED_TAG # <.../>
cur, pos = @stack.pop
cur.closed = true
@delegate.tag_complete(cur)
elsif end_tag_type == OPENED_TAG # <...>
cur, pos = @stack.last
@delegate.tag_begin(cur)
end
end
end
def attribute(name, value)
@stack.last[0].attributes[name] = value
end
def instruction(content)
cdata("<?#{content}?>")
end
end
end
end
Version data entries
31 entries across 31 versions & 1 rubygems