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import re
import unicodedata
from collections import Counter
from pybtex.style.formatting.unsrt import Style as UnsrtStyle
from pybtex.style.formatting.plain import Style as PlainStyle
from pybtex.style.labels import BaseLabelStyle
from pybtex.plugin import register_plugin
_alphanum_ = re.compile('[^A-Za-z0-9-]+', re.UNICODE)
def strip_accents(s):
return ''.join((c for c in unicodedata.normalize('NFD', s)
if not unicodedata.combining(c)))
def lastname(p):
s = strip_accents(''.join(p.prelast_names + p.last_names))
return _alphanum_.sub('', s)
class AuthorsLabelStyle(BaseLabelStyle):
def format_labels(self, sorted_entries):
labels = [self.format_label(entry) for entry in sorted_entries]
count = Counter(labels)
counted = Counter()
for label in labels:
if count[label] == 1:
yield label
else:
yield label + chr(ord('a') + counted[label])
counted.update([label])
def format_label(self, entry):
# see alpha.bst calc.label
org = entry.type in ("proceedings", "manual")
editor = entry.type in ("book", "inbook", "proceedings",
"inproceedings")
author = entry.type not in ("proceedings")
label = self.generate_label(entry, author=author,
editor=editor, org=org)
if "year" in entry.fields:
label = "{:s} ({:s})".format(label, entry.fields["year"])
return label
def generate_label(self, entry, author=True, editor=True, org=True):
result = entry.fields["key"] if "key" in entry.fields else entry.key
if author and "author" in entry.persons:
result = self.names2label(entry.persons["author"])
elif editor and "editor" in entry.persons:
result = self.names2label(entry.persons["editor"])
elif org and "organization" in entry.fields:
result = entry.fields["organization"]
if result.startswith("The "):
result = result[4:]
return result
def names2label(self, persons):
numnames = len(persons)
if numnames == 1:
result = lastname(persons[0])
elif numnames == 2:
result = '{:s} and {:s}'.format(lastname(persons[0]),
lastname(persons[1]))
elif numnames == 3:
result = '{:s}, {:s}, and {:s}'.format(lastname(persons[0]),
lastname(persons[1]),
lastname(persons[2]))
else:
result = '{:s} et al.'.format(lastname(persons[0]))
return result
class AuthorListPlainStyle(PlainStyle):
default_label_style = AuthorsLabelStyle
class AuthorListUnsrtStyle(UnsrtStyle):
default_label_style = AuthorsLabelStyle
register_plugin('pybtex.style.formatting', 'authorlist', AuthorListPlainStyle)
register_plugin('pybtex.style.formatting', 'authorlist_unsrt', AuthorListUnsrtStyle)
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