#!/usr/bin/env ruby
#
#	Rpdf2txt -- PDF to Text Parser
#	Copyright (C) 2003 Andreas Schrafl, Hannes Wyss
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#
#	ywesee - intellectual capital connected, Winterthurerstrasse 52, CH-8006 Zürich, Switzerland
#	hwyss@ywesee.com,	aschrafl@ywesee.com
#
# TextParser -- Rpdf2txt -- 04.11.2004 -- mwalder@ywesee.com
# rwaltert@ywesee.com 

require 'rpdf2txt-rockit/rockit'

module Rpdf2txt
		CMAP_GRAMMAR = File.expand_path('data/cmap.grammar', 
			File.dirname(__FILE__))
		CMAP_PARSER = File.expand_path('data/cmap.rb', 
			File.dirname(__FILE__))
		CMAP_RANGE_GRAMMAR = File.expand_path('data/cmap_range.grammar', 
			File.dirname(__FILE__))
		CMAP_RANGE_PARSER = File.expand_path('data/cmap_range.rb', 
			File.dirname(__FILE__))
		def Rpdf2txt.cmap_parser(grammar_path=CMAP_GRAMMAR, 
			parser_path=CMAP_PARSER)
			oldpath = File.dirname(grammar_path) \
				<< "/_" << File.basename(grammar_path)
			src = File.read(grammar_path)
			unless(File.exists?(oldpath) && File.read(oldpath)==src)
				File.delete(oldpath) if File.exists?(oldpath)
				Parse.generate_parser_from_file_to_file(grammar_path, 
					parser_path, '_cmap_parser', 'Rpdf2txt')
				File.open(oldpath, 'w') { |f| f << src }
			end
			require parser_path
			Rpdf2txt._cmap_parser
		end
		def Rpdf2txt.cmap_range_parser(grammar_path=CMAP_RANGE_GRAMMAR,		
			parser_path=CMAP_RANGE_PARSER)
			oldpath = File.dirname(grammar_path) \
				<< "/_" << File.basename(grammar_path)
			src = File.read(grammar_path)
			unless(File.exists?(oldpath) && File.read(oldpath)==src)
				File.delete(oldpath) if File.exists?(oldpath)
				Parse.generate_parser_from_file_to_file(grammar_path, 
					parser_path, '_cmap_range_parser', 'Rpdf2txt')
				File.open(oldpath, 'w') { |f| f << src }
			end
			require parser_path
			Rpdf2txt._cmap_range_parser
		end
end