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#!/usr/bin/env python3
# :Author: Günter Milde <milde@users.sf.net>
# :Revision: $Revision: 9293 $
# :Date: $Date: 2022-12-01 22:13:54 +0100 (Do, 01. Dez 2022) $
# :Copyright: © 2010 Günter Milde.
# :License: Released under the terms of the `2-Clause BSD license`_, in short:
#
# Copying and distribution of this file, with or without modification,
# are permitted in any medium without royalty provided the copyright
# notice and this notice are preserved.
# This file is offered as-is, without any warranty.
#
# .. _2-Clause BSD license: https://opensource.org/licenses/BSD-2-Clause
"""
XeLaTeX document tree Writer.
A variant of Docutils' standard 'latex2e' writer producing LaTeX output
suited for processing with the Unicode-aware TeX engines
LuaTeX and XeTeX.
"""
__docformat__ = 'reStructuredText'
from docutils import frontend
from docutils.writers import latex2e
class Writer(latex2e.Writer):
"""A writer for Unicode-aware LaTeX variants (XeTeX, LuaTeX)"""
supported = ('latex', 'tex', 'xetex', 'xelatex', 'luatex', 'lualatex')
"""Formats this writer supports."""
default_template = 'xelatex.tex'
default_preamble = """\
% Linux Libertine (free, wide coverage, not only for Linux)
\\setmainfont{Linux Libertine O}
\\setsansfont{Linux Biolinum O}
\\setmonofont[HyphenChar=None,Scale=MatchLowercase]{DejaVu Sans Mono}"""
config_section = 'xetex writer'
config_section_dependencies = ('writers', 'latex writers')
# use a copy of the parent spec with some modifications:
settings_spec = frontend.filter_settings_spec(
latex2e.Writer.settings_spec,
# removed settings
'font_encoding',
# changed settings:
template=('Template file. Default: "%s".' % default_template,
['--template'],
{'default': default_template, 'metavar': '<file>'}),
latex_preamble=('Customization by LaTeX code in the preamble. '
'Default: select "Linux Libertine" fonts.',
['--latex-preamble'],
{'default': default_preamble}),
)
def __init__(self):
latex2e.Writer.__init__(self)
self.settings_defaults.update({'fontencoding': ''}) # use default (TU)
self.translator_class = XeLaTeXTranslator
class Babel(latex2e.Babel):
"""Language specifics for XeTeX.
Use `polyglossia` instead of `babel` and adapt settings.
"""
language_codes = latex2e.Babel.language_codes.copy()
# Additionally supported or differently named languages:
language_codes.update({
# code Polyglossia-name comment
'cop': 'coptic',
'de': 'german', # new spelling (de_1996)
'de-1901': 'ogerman', # old spelling
'dv': 'divehi', # Maldivian
'dsb': 'lsorbian',
'el-polyton': 'polygreek',
'fa': 'farsi',
'grc': 'ancientgreek',
'ko': 'korean',
'hsb': 'usorbian',
'sh-Cyrl': 'serbian', # Serbo-Croatian, Cyrillic script
'sh-Latn': 'croatian', # Serbo-Croatian, Latin script
'sq': 'albanian',
'sr': 'serbian', # Cyrillic script (sr-Cyrl)
'th': 'thai',
'vi': 'vietnamese',
# zh-Latn: ??? # Chinese Pinyin
})
# normalize (downcase) keys
language_codes = {k.lower(): v for k, v in language_codes.items()}
# Languages without Polyglossia support:
for key in ('af', # 'afrikaans',
'de-AT', # 'naustrian',
'de-AT-1901', # 'austrian',
# TODO: use variant=... for English variants
'en-CA', # 'canadian',
'en-GB', # 'british',
'en-NZ', # 'newzealand',
'en-US', # 'american',
'fr-CA', # 'canadien',
'grc-ibycus', # 'ibycus', (Greek Ibycus encoding)
'sr-Latn', # 'serbian script=latin'
):
del language_codes[key.lower()]
def __init__(self, language_code, reporter):
self.language_code = language_code
self.reporter = reporter
self.language = self.language_name(language_code)
self.otherlanguages = {}
self.warn_msg = 'Language "%s" not supported by Polyglossia.'
self.quote_index = 0
self.quotes = ('"', '"')
# language dependent configuration:
# double quotes are "active" in some languages (e.g. German).
self.literal_double_quote = '"' # TODO: use \textquotedbl ?
def __call__(self):
setup = [r'\usepackage{polyglossia}',
r'\setdefaultlanguage{%s}' % self.language]
if self.otherlanguages:
setup.append(r'\setotherlanguages{%s}' %
','.join(sorted(self.otherlanguages.keys())))
return '\n'.join(setup)
class XeLaTeXTranslator(latex2e.LaTeXTranslator):
"""
Generate code for LaTeX using Unicode fonts (XeLaTex or LuaLaTeX).
See the docstring of docutils.writers._html_base.HTMLTranslator for
notes on and examples of safe subclassing.
"""
def __init__(self, document):
self.is_xetex = True # typeset with XeTeX or LuaTeX engine
latex2e.LaTeXTranslator.__init__(self, document, Babel)
if self.latex_encoding == 'utf8':
self.requirements.pop('_inputenc', None)
else:
self.requirements['_inputenc'] = (r'\XeTeXinputencoding %s '
% self.latex_encoding)
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