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348 lines
10 KiB
348 lines
10 KiB
# vim:fileencoding=utf8
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# Copyright (c) 2006-2021 Andrey Golovizin
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#
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# Permission is hereby granted, free of charge, to any person obtaining
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# a copy of this software and associated documentation files (the
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# "Software"), to deal in the Software without restriction, including
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# without limitation the rights to use, copy, modify, merge, publish,
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# distribute, sublicense, and/or sell copies of the Software, and to
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# permit persons to whom the Software is furnished to do so, subject to
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# the following conditions:
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#
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# The above copyright notice and this permission notice shall be
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# included in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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"""
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A template engine for bibliography entries and more.
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Inspired by Brevé -- http://breve.twisty-industries.com/
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>>> from pybtex.database import Entry, Person
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>>> author = Person(first='First', last='Last', middle='Middle')
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>>> fields = {
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... 'title': 'The Book',
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... 'year': '2000',
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... }
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>>> e = Entry('book', fields=fields)
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>>> book_format = sentence(capfirst=True, sep=', ') [
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... field('title'), field('year'), optional [field('sdf')]
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... ]
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>>> print(six.text_type(book_format.format_data({'entry': e})))
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The Book, 2000.
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>>> print(six.text_type(words ['one', 'two', words ['three', 'four']].format_data(e)))
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one two three four
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"""
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from __future__ import unicode_literals
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import six
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from pybtex import richtext
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from pybtex.exceptions import PybtexError
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from pybtex.py3compat import fix_unicode_literals_in_doctest
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__test__ = {} # for doctest
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class Node(object):
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def __init__(self, name, f):
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self.name = name
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self.f = f
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self.args = []
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self.kwargs = {}
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self.children = []
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def _clone(self):
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result = Node(self.name, self.f)
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result.args = list(self.args)
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result.kwargs = dict(self.kwargs)
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result.children = list(self.children)
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return result
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def __call__(self, *args, **kwargs):
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result = self._clone()
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result.args.extend(args)
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result.kwargs.update(kwargs)
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return result
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def __getitem__(self, children):
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result = self._clone()
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if isinstance(children, (list, tuple)):
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result.children.extend(children)
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else:
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result.children.append(children)
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return result
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@fix_unicode_literals_in_doctest
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def __repr__(self):
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"""
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>>> join(', ')
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join(u', ')
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>>> join
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join
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>>> join ['a']
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join [u'a']
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>>> join ['a', 'b', 'c']
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join [u'a', u'b', u'c']
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>>> join(' ') [u'a', u'b', u'c']
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join(u' ') [u'a', u'b', u'c']
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>>> join(sep=' ') [u'a', u'b', u'c']
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join(sep=u' ') [u'a', u'b', u'c']
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>>> join(sep=u' ') [tag('em') [u'a', u'b', u'c']]
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join(sep=u' ') [tag(u'em') [u'a', u'b', u'c']]
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"""
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params = []
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args_repr = ', '.join(repr(arg) for arg in self.args)
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if args_repr:
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params.append(args_repr)
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kwargs_repr = ', '.join(
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'%s=%s' % (key, repr(value)) for (key, value) in self.kwargs.items()
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)
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if kwargs_repr:
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params.append(kwargs_repr)
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if params:
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params_repr = '(%s)' % ', '.join(params)
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else:
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params_repr = ''
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if self.children:
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children_repr = ' [%s]' % ', '.join(
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repr(child) for child in self.children
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)
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else:
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children_repr = ''
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return ''.join([self.name, params_repr, children_repr])
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def format_data(self, data):
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"""Format the given data into a piece of richtext.Text"""
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return self.f(self.children, data, *self.args, **self.kwargs)
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def format(self):
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"""A convenience function to be used instead of format_data
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when no data is needed.
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"""
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return self.format_data(None)
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def _format_data(node, data):
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try:
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f = node.format_data
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except AttributeError:
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return node
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else:
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return f(data)
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def _format_list(list_, data):
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return (_format_data(part, data) for part in list_)
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def node(f):
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if f.__doc__:
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__test__[f.__name__] = f
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return Node(f.__name__, f)
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@node
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def join(children, data, sep='', sep2=None, last_sep=None):
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"""Join text fragments together.
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>>> print(six.text_type(join.format()))
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<BLANKLINE>
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>>> print(six.text_type(join ['a', 'b', 'c', 'd', 'e'].format()))
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abcde
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>>> print(six.text_type(join(sep=', ', sep2=' and ', last_sep=', and ') ['Tom', 'Jerry'].format()))
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Tom and Jerry
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>>> print(six.text_type(join(sep=', ', sep2=' and ', last_sep=', and ') ['Billy', 'Willy', 'Dilly'].format()))
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Billy, Willy, and Dilly
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"""
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if sep2 is None:
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sep2 = sep
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if last_sep is None:
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last_sep = sep
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parts = [part for part in _format_list(children, data) if part]
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if len(parts) <= 1:
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return richtext.Text(*parts)
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elif len(parts) == 2:
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return richtext.Text(sep2).join(parts)
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else:
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return richtext.Text(last_sep).join([richtext.Text(sep).join(parts[:-1]), parts[-1]])
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@node
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def words(children, data, sep=' '):
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"""Join text fragments with spaces or something else."""
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return join(sep) [children].format_data(data)
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@node
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def together(children, data, last_tie=False):
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"""
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Try to keep words together, like BibTeX does.
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>>> print(six.text_type(together ['very', 'long', 'road'].format()))
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very long road
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>>> print(six.text_type(together(last_tie=True) ['very', 'long', 'road'].format()))
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very long<nbsp>road
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>>> print(six.text_type(together ['a', 'very', 'long', 'road'].format()))
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a<nbsp>very long road
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>>> print(six.text_type(together ['chapter', '8'].format()))
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chapter<nbsp>8
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>>> print(six.text_type(together ['chapter', '666'].format()))
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chapter 666
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"""
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from pybtex.textutils import tie_or_space
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tie = richtext.nbsp
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space = richtext.String(' ')
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parts = [part for part in _format_list(children, data) if part]
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if not parts:
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return richtext.Text()
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if len(parts) <= 2:
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tie2 = tie if last_tie else tie_or_space(parts[0], tie, space, other_word=parts[-1])
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return tie2.join(parts)
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else:
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last_tie = tie if last_tie else tie_or_space(parts[-1], tie, space)
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return richtext.Text(
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parts[0], tie_or_space(parts[0], tie, space),
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space.join(parts[1:-1]), last_tie, parts[-1]
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)
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@node
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def sentence(children, data, capfirst=False, capitalize=False, add_period=True, sep=', '):
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"""Join text fragments, capitalyze the first letter, add a period to the end.
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>>> print(six.text_type(sentence.format()))
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<BLANKLINE>
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>>> print(six.text_type(sentence(capitalize=True, sep=' ') ['mary', 'had', 'a', 'little', 'lamb'].format()))
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Mary had a little lamb.
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>>> print(six.text_type(sentence(capitalize=False, add_period=False) ['uno', 'dos', 'tres'].format()))
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uno, dos, tres
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"""
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text = join(sep) [children].format_data(data)
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if capfirst:
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text = text.capfirst()
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if capitalize:
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text = text.capitalize()
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if add_period:
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text = text.add_period()
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return text
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class FieldIsMissing(PybtexError):
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def __init__(self, field_name, entry):
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self.field_name = field_name
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super(FieldIsMissing, self).__init__(
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u'missing {0} in {1}'.format(field_name, getattr(entry, 'key', '<unnamed>'))
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)
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@node
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def field(children, context, name, apply_func=None, raw=False):
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"""Return the contents of the bibliography entry field."""
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assert not children
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entry = context['entry']
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try:
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field = entry._find_field(name, bib_data=context.get('bib_data'))
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if not raw:
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field = richtext.Text.from_latex(field)
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except KeyError:
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raise FieldIsMissing(name, entry)
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else:
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if apply_func:
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field = apply_func(field)
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return field
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@node
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def names(children, context, role, **kwargs):
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"""Return formatted names."""
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assert not children
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try:
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persons = context['entry'].persons[role]
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except KeyError:
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raise FieldIsMissing(role, context['entry'])
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style = context['style']
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formatted_names = [style.format_name(person, style.abbreviate_names) for person in persons]
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return join(**kwargs) [formatted_names].format_data(context)
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@node
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def optional(children, data):
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"""If children contain a missing bibliography field, return None.
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Else return formatted children.
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>>> from pybtex.database import Entry
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>>> template = optional [field('volume'), optional['(', field('number'), ')']]
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>>> template.format_data({'entry': Entry('article')})
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Text()
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"""
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try:
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return richtext.Text(*_format_list(children, data))
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except FieldIsMissing:
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return richtext.Text()
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@node
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def optional_field(children, data, *args, **kwargs):
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assert not children
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return optional [field(*args, **kwargs)].format_data(data)
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@node
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def tag(children, data, name):
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"""Wrap text into a tag.
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>>> print(tag('em') ['important'].format().render_as('html'))
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<em>important</em>
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>>> print(sentence ['ready', 'set', tag('em') ['go']].format().render_as('html'))
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ready, set, <em>go</em>.
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>>> print(sentence(capitalize=True) ['ready', 'set', tag('em') ['go']].format().render_as('html'))
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Ready, set, <em>go</em>.
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"""
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parts = _format_list(children, data)
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return richtext.Tag(name, *parts)
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@node
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def href(children, data):
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"""Wrap text into a href.
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>>> print(href ['www.test.org', 'important'].format().render_as('html'))
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<a href="www.test.org">important</a>
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>>> print(sentence ['ready', 'set', href ['www.test.org', 'go']].format().render_as('html'))
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ready, set, <a href="www.test.org">go</a>.
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"""
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parts = _format_list(children, data)
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return richtext.HRef(*parts)
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@node
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def first_of(children, data):
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"""Return first nonempty child."""
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for child in _format_list(children, data):
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if child:
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return child
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return richtext.Text()
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