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#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Copyright (C) 2010 Søren Roug, European Environment Agency
#
# This is free software. You may redistribute it under the terms
# of the Apache license and the GNU General Public License Version
# 2 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, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
#
# Contributor(s):
#
import unittest
""" Really simplistic parser of an element with attributes """
class ElementParser:
def __init__(self, s, elmttoparse):
qelements = s.split('<')
for i in range(len(qelements)):
q = qelements[i]
if q[:len(elmttoparse)] == elmttoparse:
s = '<'.join([''] + qelements[i:])
self.attributes = {}
self.element = None
currattr = None
buf = []
START = 1
INELEM = 2
SPACE = 3
INATTR = 4
INVALUE=5
BEFOREVALUE = 6
NOMORE = 7
state=START
ls = list(s)
for c in ls:
if state == NOMORE:
continue
if state == INVALUE: # We're in the value of the attribute. Only look for the terminator
if c == '"':
state = SPACE
c = ''.join(buf)
self.attributes[currattr] = c
buf = []
else:
buf.append(c)
else:
if c == '<':
state = INELEM
elif c == ' ':
if state == INELEM:
self.element = ''.join(buf)
buf = []
state = SPACE
elif c == '=':
if state == INATTR:
state = BEFOREVALUE
currattr = ''.join(buf)
buf = []
elif c == '"':
state = INVALUE
elif c == '>' or c == '/':
state = NOMORE
elif c > '"' and c <= 'z' and state == SPACE: # Start of attribute
state = INATTR
buf = []
buf.append(c)
else:
buf.append(c)
def has_value(self, attribute, value):
v = self.attributes.get(attribute, None)
if v and v == value: return True
return False
class TestParser(unittest.TestCase):
def test1(self):
s='<draw:object xlink:href="./Object 1"/><style:style style:name="Standard" style:display-name="Standard" style:family="paragraph"><style:property/>'
e = ElementParser(s,'style:style')
self.assertEqual(e.element,'style:style')
assert e.has_value("style:display-name","Standard")
e = ElementParser(s,'draw:object')
self.assertEqual(e.element,'draw:object')
assert e.has_value("xlink:href","./Object 1")
if __name__ == '__main__':
unittest.main()
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