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#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# Copyright 2002-2006 Zuza Software Foundation
#
# This file is part of translate.
#
# translate 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 2 of the License, or
# (at your option) any later version.
#
# translate 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 translate; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
"""classes that hold units of comma-separated values (.csv) files (csvunit)
or entire files (csvfile) for use with localisation
"""
import csv
from translate.misc import sparse
from translate.storage import base
class SimpleDictReader:
def __init__(self, fileobj, fieldnames):
self.fieldnames = fieldnames
self.contents = fileobj.read()
self.parser = sparse.SimpleParser(defaulttokenlist=[",", "\n"], whitespacechars="\r")
self.parser.stringescaping = 0
self.parser.quotechars = '"'
self.tokens = self.parser.tokenize(self.contents)
self.tokenpos = 0
def __iter__(self):
return self
def getvalue(self, value):
"""returns a value, evaluating strings as neccessary"""
if (value.startswith("'") and value.endswith("'")) or (value.startswith('"') and value.endswith('"')):
return sparse.stringeval(value)
else:
return value
def next(self):
lentokens = len(self.tokens)
while self.tokenpos < lentokens and self.tokens[self.tokenpos] == "\n":
self.tokenpos += 1
if self.tokenpos >= lentokens:
raise StopIteration()
thistokens = []
while self.tokenpos < lentokens and self.tokens[self.tokenpos] != "\n":
thistokens.append(self.tokens[self.tokenpos])
self.tokenpos += 1
while self.tokenpos < lentokens and self.tokens[self.tokenpos] == "\n":
self.tokenpos += 1
fields = []
# patch together fields since we can have quotes inside a field
currentfield = ''
fieldparts = 0
for token in thistokens:
if token == ',':
# a field is only quoted if the whole thing is quoted
if fieldparts == 1:
currentfield = self.getvalue(currentfield)
fields.append(currentfield)
currentfield = ''
fieldparts = 0
else:
currentfield += token
fieldparts += 1
# things after the last comma...
if fieldparts:
if fieldparts == 1:
currentfield = self.getvalue(currentfield)
fields.append(currentfield)
values = {}
for fieldnum in range(len(self.fieldnames)):
if fieldnum >= len(fields):
values[self.fieldnames[fieldnum]] = ""
else:
values[self.fieldnames[fieldnum]] = fields[fieldnum]
return values
class csvunit(base.TranslationUnit):
spreadsheetescapes = [("+", "\\+"), ("-", "\\-"), ("=", "\\="), ("'", "\\'")]
def __init__(self, source=None):
super(csvunit, self).__init__(source)
self.comment = ""
self.source = source
self.target = ""
def add_spreadsheet_escapes(self, source, target):
"""add common spreadsheet escapes to two strings"""
for unescaped, escaped in self.spreadsheetescapes:
if source.startswith(unescaped):
source = source.replace(unescaped, escaped, 1)
if target.startswith(unescaped):
target = target.replace(unescaped, escaped, 1)
return source, target
def remove_spreadsheet_escapes(self, source, target):
"""remove common spreadsheet escapes from two strings"""
for unescaped, escaped in self.spreadsheetescapes:
if source.startswith(escaped):
source = source.replace(escaped, unescaped, 1)
if target.startswith(escaped):
target = target.replace(escaped, unescaped, 1)
return source, target
def fromdict(self, cedict):
self.comment = cedict.get('location', '').decode('utf-8')
self.source = cedict.get('source', '').decode('utf-8')
self.target = cedict.get('target', '').decode('utf-8')
if self.comment is None:
self.comment = ''
if self.source is None:
self.source = ''
if self.target is None:
self.target = ''
self.source, self.target = self.remove_spreadsheet_escapes(self.source, self.target)
def todict(self, encoding='utf-8'):
comment, source, target = self.comment, self.source, self.target
source, target = self.add_spreadsheet_escapes(source, target)
if isinstance(comment, unicode):
comment = comment.encode(encoding)
if isinstance(source, unicode):
source = source.encode(encoding)
if isinstance(target, unicode):
target = target.encode(encoding)
return {'location':comment, 'source': source, 'target': target}
class csvfile(base.TranslationStore):
"""This class represents a .csv file with various lines.
The default format contains three columns: location, source, target"""
UnitClass = csvunit
Name = _("Comma Separated Value")
Mimetypes = ['text/comma-separated-values', 'text/csv']
Extensions = ["csv"]
def __init__(self, inputfile=None, fieldnames=None):
base.TranslationStore.__init__(self, unitclass = self.UnitClass)
self.units = []
if fieldnames is None:
self.fieldnames = ['location', 'source', 'target']
else:
if isinstance(fieldnames, basestring):
fieldnames = [fieldname.strip() for fieldname in fieldnames.split(",")]
self.fieldnames = fieldnames
self.filename = getattr(inputfile, 'name', '')
if inputfile is not None:
csvsrc = inputfile.read()
inputfile.close()
self.parse(csvsrc)
def parse(self, csvsrc):
csvfile = csv.StringIO(csvsrc)
reader = SimpleDictReader(csvfile, self.fieldnames)
for row in reader:
newce = self.UnitClass()
newce.fromdict(row)
self.addunit(newce)
def __str__(self):
"""convert to a string. double check that unicode is handled somehow here"""
source = self.getoutput()
if isinstance(source, unicode):
return source.encode(getattr(self, "encoding", "UTF-8"))
return source
def getoutput(self):
csvfile = csv.StringIO()
writer = csv.DictWriter(csvfile, self.fieldnames)
for ce in self.units:
cedict = ce.todict()
writer.writerow(cedict)
csvfile.reset()
return "".join(csvfile.readlines())
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