#!/usr/bin/python
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# 
# This program 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 General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
# 
import zipfile
import xml.parsers.expat


class odsreader:
	def __init__(self, file):
		# get content.xml from the archive
		ziparchive = zipfile.ZipFile(file, "r")
		xmldata = ziparchive.read("content.xml")
		ziparchive.close()

		self.__iter_cnt = 0
		self.__rows = [ ]
		self.__working_row = [ ]

		p = xml.parsers.expat.ParserCreate()	

		p.StartElementHandler = self.__start_element__
		p.EndElementHandler = self.__end_element__
		p.CharacterDataHandler = self.__char_data__
		# parse the data
		p.Parse(xmldata, True)


	def __iter__(self):
		return self


	def next(self):
		if self.__iter_cnt == len(self.__rows):
			raise StopIteration
		else:
			self.__iter_cnt = self.__iter_cnt + 1
			return self.__rows[self.__iter_cnt - 1]


	def __start_element__(self, name, attrs):
		if name == 'table:table-row':
			self.__working_row = [ ]


	def __end_element__(self, name):
		if name == 'table:table-row' and len(self.__working_row) > 0:
			self.__rows.append(self.__working_row)


	def __char_data__(self, data):
		self.__working_row.append(data)