#!/usr/bin/env python

# -*- coding: utf-8 -*-

'''

Copyright 2010 Beech Horn

This file is part of lesscss-python.

lesscss-python 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.

lesscss-python 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 lesscss-python. If not, see <http://www.gnu.org/licenses/>.

'''

import re

from lesscss.nested import parse_nested

from lesscss.property import Property

from lesscss.rules import Rules

SELECTOR = re.compile('''

(?P<names>

[a-z 0-9 \- _ \* \. \s , : # & @]+?

)

\s*

{

''', re.DOTALL | re.VERBOSE)

def parse_selector(less, parent=None, **kwargs):

match = SELECTOR.match(less)

if not match:

raise ValueError()

names = match.group('names')

if names.startswith('@media'):

raise ValueError

names = [name.strip() for name in names.split(',')]

matched_length = len(match.group())

remaining_less = less[matched_length:]

contents = parse_nested(remaining_less)

code = match.group() + contents + '}'

return Selector(code=code, names=names, contents=contents, parent=parent)

class Selector(Rules):

__slots__ = ('__names',)

def __init__(self, parent, code, names=None, contents=None):

Rules.__init__(self, parent=parent, code=code, contents=contents)

self.__names = names

def __get_names(self):

try:

parent_names = self.parent.names

except AttributeError:

return self.__names

else:

if not parent_names:

return self.__names

names = list()

for parent_name in parent_names:

for name in self.__names:

if name[0] == ':':

name = parent_name + name

else:

name = ' '.join((parent_name, name))

name = name.replace(' &', '')

names.append(name)

return names

names = property(fget=__get_names)