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# Copyright (C) 2006-2007, Red Hat, Inc.
# Copyright (C) 2007, One Laptop Per Child
#
# 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 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.
import logging
from sugar import _sugarext
def get_for_file(file_name):
mime_type = _sugarext.get_mime_type_for_file(file_name)
if mime_type == 'application/octet-stream':
if _file_looks_like_text(file_name):
return 'text/plain'
else:
return 'application/octet-stream'
return mime_type
def get_from_file_name(file_name):
return _sugarext.get_mime_type_from_file_name(file_name)
_extensions_cache = {}
def get_primary_extension(mime_type):
if _extensions_cache.has_key(mime_type):
return _extensions_cache[mime_type]
f = open('/etc/mime.types')
while True:
line = f.readline()
if not line:
break
cols = line.replace('\t', ' ').split(' ')
if mime_type == cols[0]:
for col in cols[1:]:
if col:
col = col.replace('\n', '')
_extensions_cache[mime_type] = col
return col
_extensions_cache[mime_type] = None
return None
def choose_most_significant(mime_types):
logging.debug('Choosing between %r.' % mime_types)
if not mime_types:
return ''
if 'text/uri-list' in mime_types:
return 'text/uri-list'
for mime_category in ['image/', 'application/']:
for mime_type in mime_types:
if mime_type.startswith(mime_category):
# skip mozilla private types (second component starts with '_'
# or ends with '-priv')
if mime_type.split('/')[1].startswith('_') or \
mime_type.split('/')[1].endswith('-priv'):
continue
# take out the specifier after ';' that mozilla likes to add
mime_type = mime_type.split(';')[0]
logging.debug('Choosed %r!' % mime_type)
return mime_type
if 'text/x-moz-url' in mime_types:
logging.debug('Choosed text/x-moz-url!')
return 'text/x-moz-url'
if 'text/html' in mime_types:
logging.debug('Choosed text/html!')
return 'text/html'
if 'text/plain' in mime_types:
logging.debug('Choosed text/plain!')
return 'text/plain'
logging.debug('Returning first: %r.' % mime_types[0])
return mime_types[0]
def _file_looks_like_text(file_name):
f = open(file_name, 'r')
try:
sample = f.read(256)
finally:
f.close()
if '\000' in sample:
return False
for encoding in ('ascii', 'latin_1', 'utf_8', 'utf_16'):
try:
string = unicode(sample, encoding)
return True
except Exception, e:
pass
return False
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