docutils/writers/xetex/__init__.py

   1 #!/usr/bin/env python
   2 # -*- coding: utf-8 -*-
   3
   4 # :Author: Günter Milde <milde@users.sourceforge.net>
   5 # :Revision: $Revision$
   6 # :Date: $Date$
   7 # :Copyright: © 2010 Günter Milde.
   8 # :License: Released under the terms of the `2-Clause BSD license`_, in short:
   9 #
  10 #    Copying and distribution of this file, with or without modification,
  11 #    are permitted in any medium without royalty provided the copyright
  12 #    notice and this notice are preserved.
  13 #    This file is offered as-is, without any warranty.
  14 #
  15 # .. _2-Clause BSD license: http://www.spdx.org/licenses/BSD-2-Clause
  16
  17 """
  18 XeLaTeX document tree Writer.
  19
  20 A variant of Docutils' standard 'latex2e' writer producing output
  21 suited for processing with XeLaTeX (http://tug.org/xetex/).
  22 """
  23
  24 __docformat__ = 'reStructuredText'
  25
  26 import os
  27 import os.path
  28 import re
  29
  30 import docutils
  31 from docutils import frontend, nodes, utils, writers, languages
  32 from docutils.writers import latex2e
  33
  34 class Writer(latex2e.Writer):
  35     """A writer for Unicode-based LaTeX variants (XeTeX, LuaTeX)"""
  36
  37     supported = ('xetex','xelatex','luatex')
  38     """Formats this writer supports."""
  39
  40     default_template = 'xelatex.tex'
  41     default_preamble = '\n'.join([
  42         r'% Linux Libertine (free, wide coverage, not only for Linux)',
  43         r'\setmainfont{Linux Libertine O}',
  44         r'\setsansfont{Linux Biolinum O}',
  45         r'\setmonofont[HyphenChar=None,Scale=MatchLowercase]{DejaVu Sans Mono}',
  46     ])
  47
  48     config_section = 'xetex writer'
  49     config_section_dependencies = ('writers', 'latex2e writer')
  50
  51     settings_spec = frontend.filter_settings_spec(
  52         latex2e.Writer.settings_spec,
  53         'font_encoding',
  54         template=('Template file. Default: "%s".' % default_template,
  55           ['--template'], {'default': default_template, 'metavar': '<file>'}),
  56         latex_preamble=('Customization by LaTeX code in the preamble. '
  57           'Default: select PDF standard fonts (Times, Helvetica, Courier).',
  58           ['--latex-preamble'],
  59           {'default': default_preamble}),
  60         )
  61
  62     def __init__(self):
  63         latex2e.Writer.__init__(self)
  64         self.settings_defaults.update({'fontencoding': ''}) # use default (EU1 or EU2)
  65         self.translator_class = XeLaTeXTranslator
  66
  67
  68 class Babel(latex2e.Babel):
  69     """Language specifics for XeTeX.
  70
  71     Use `polyglossia` instead of `babel` and adapt settings.
  72     """
  73     language_codes = latex2e.Babel.language_codes.copy()
  74     # Additionally supported or differently named languages:
  75     language_codes.update({
  76         # code          Polyglossia-name       comment
  77         'cop':          'coptic',
  78         'de':           'german', # new spelling (de_1996)
  79         'de-1901':      'ogerman', # old spelling
  80         'dv':           'divehi',  # Maldivian
  81         'dsb':          'lsorbian',
  82         'el-polyton':   'polygreek',
  83         'fa':           'farsi',
  84         'grc':          'ancientgreek',
  85         'hsb':          'usorbian',
  86         'sh-Cyrl':      'serbian', # Serbo-Croatian, Cyrillic script
  87         'sh-Latn':      'croatian', # Serbo-Croatian, Latin script
  88         'sq':           'albanian',
  89         'sr':           'serbian', # Cyrillic script (sr-Cyrl)
  90         'th':           'thai',
  91         'vi':           'vietnamese',
  92         # zh-Latn:      ???        #     Chinese Pinyin
  93         })
  94     # normalize (downcase) keys
  95     language_codes = dict([(k.lower(), v) for (k,v) in language_codes.items()])
  96
  97     # Languages without Polyglossia support:
  98     for key in ('af',           # 'afrikaans',
  99                 'de-AT',        # 'naustrian',
 100                 'de-AT-1901',   # 'austrian',
 101                 'fr-CA',        # 'canadien',
 102                 'grc-ibycus',   # 'ibycus', (Greek Ibycus encoding)
 103                 'sr-Latn',      # 'serbian script=latin'
 104                ):
 105         del(language_codes[key.lower()])
 106
 107     def __init__(self, language_code, reporter):
 108         self.language_code = language_code
 109         self.reporter = reporter
 110         self.language = self.language_name(language_code)
 111         self.otherlanguages = {}
 112         self.warn_msg = 'Language "%s" not supported by XeTeX (polyglossia).'
 113         self.quote_index = 0
 114         self.quotes = ('"', '"')
 115         # language dependent configuration:
 116         # double quotes are "active" in some languages (e.g. German).
 117         self.literal_double_quote = u'"' # TODO: use \textquotedbl
 118
 119     def __call__(self):
 120         setup = [r'\usepackage{polyglossia}',
 121                  r'\setdefaultlanguage{%s}' % self.language]
 122         if self.otherlanguages:
 123             setup.append(r'\setotherlanguages{%s}' %
 124                          ','.join(sorted(self.otherlanguages.keys())))
 125         return '\n'.join(setup)
 126
 127
 128 class XeLaTeXTranslator(latex2e.LaTeXTranslator):
 129
 130     def __init__(self, document):
 131         self.is_xetex = True  # typeset with XeTeX or LuaTeX engine
 132         latex2e.LaTeXTranslator.__init__(self, document, Babel)
 133         if self.latex_encoding == 'utf8':
 134             self.requirements.pop('_inputenc', None)
 135         else:
 136             self.requirements['_inputenc'] = (r'\XeTeXinputencoding %s '
 137                                               % self.latex_encoding)