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annotate planemo/lib/python3.7/site-packages/docutils/writers/__init__.py @ 0:d30785e31577 draft

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"planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
author guerler
date Fri, 31 Jul 2020 00:18:57 -0400
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1 # $Id: __init__.py 8239 2018-11-21 21:46:00Z milde $
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2 # Author: David Goodger <goodger@python.org>
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3 # Copyright: This module has been placed in the public domain.
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4
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5 """
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6 This package contains Docutils Writer modules.
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7 """
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8
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9 __docformat__ = 'reStructuredText'
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10
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11 import os.path
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12 import sys
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13
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14 import docutils
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15 from docutils import languages, Component
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16 from docutils.transforms import universal
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17
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18
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19 class Writer(Component):
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20
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21 """
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22 Abstract base class for docutils Writers.
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23
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24 Each writer module or package must export a subclass also called 'Writer'.
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25 Each writer must support all standard node types listed in
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26 `docutils.nodes.node_class_names`.
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27
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28 The `write()` method is the main entry point.
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29 """
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30
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31 component_type = 'writer'
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32 config_section = 'writers'
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33
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34 def get_transforms(self):
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35 return Component.get_transforms(self) + [
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36 universal.Messages,
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37 universal.FilterMessages,
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38 universal.StripClassesAndElements,]
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39
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40 document = None
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41 """The document to write (Docutils doctree); set by `write`."""
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42
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43 output = None
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44 """Final translated form of `document` (Unicode string for text, binary
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45 string for other forms); set by `translate`."""
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46
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47 language = None
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48 """Language module for the document; set by `write`."""
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49
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50 destination = None
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51 """`docutils.io` Output object; where to write the document.
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52 Set by `write`."""
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53
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54 def __init__(self):
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55
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56 # Used by HTML and LaTeX writer for output fragments:
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57 self.parts = {}
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58 """Mapping of document part names to fragments of `self.output`.
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59 Values are Unicode strings; encoding is up to the client. The 'whole'
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60 key should contain the entire document output.
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61 """
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62
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63 def write(self, document, destination):
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64 """
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65 Process a document into its final form.
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66
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67 Translate `document` (a Docutils document tree) into the Writer's
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68 native format, and write it out to its `destination` (a
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69 `docutils.io.Output` subclass object).
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70
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71 Normally not overridden or extended in subclasses.
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72 """
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73 self.document = document
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74 self.language = languages.get_language(
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75 document.settings.language_code,
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76 document.reporter)
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77 self.destination = destination
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78 self.translate()
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79 output = self.destination.write(self.output)
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80 return output
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81
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82 def translate(self):
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83 """
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84 Do final translation of `self.document` into `self.output`. Called
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85 from `write`. Override in subclasses.
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86
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87 Usually done with a `docutils.nodes.NodeVisitor` subclass, in
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88 combination with a call to `docutils.nodes.Node.walk()` or
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89 `docutils.nodes.Node.walkabout()`. The ``NodeVisitor`` subclass must
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90 support all standard elements (listed in
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91 `docutils.nodes.node_class_names`) and possibly non-standard elements
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92 used by the current Reader as well.
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93 """
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94 raise NotImplementedError('subclass must override this method')
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95
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96 def assemble_parts(self):
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97 """Assemble the `self.parts` dictionary. Extend in subclasses."""
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98 self.parts['whole'] = self.output
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99 self.parts['encoding'] = self.document.settings.output_encoding
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100 self.parts['version'] = docutils.__version__
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101
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102
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103 class UnfilteredWriter(Writer):
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104
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105 """
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106 A writer that passes the document tree on unchanged (e.g. a
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107 serializer.)
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108
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109 Documents written by UnfilteredWriters are typically reused at a
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110 later date using a subclass of `readers.ReReader`.
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111 """
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112
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113 def get_transforms(self):
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114 # Do not add any transforms. When the document is reused
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115 # later, the then-used writer will add the appropriate
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116 # transforms.
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117 return Component.get_transforms(self)
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118
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119
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120 _writer_aliases = {
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121 'html': 'html4css1', # may change to html5 some day
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122 'html4': 'html4css1',
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123 'html5': 'html5_polyglot',
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124 'latex': 'latex2e',
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125 'pprint': 'pseudoxml',
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126 'pformat': 'pseudoxml',
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127 'pdf': 'rlpdf',
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128 's5': 's5_html',
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129 'xelatex': 'xetex',
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130 'xhtml': 'html5_polyglot',
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131 'xhtml10': 'html4css1',
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132 'xml': 'docutils_xml'}
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133
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134 def get_writer_class(writer_name):
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135 """Return the Writer class from the `writer_name` module."""
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136 writer_name = writer_name.lower()
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137 if writer_name in _writer_aliases:
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138 writer_name = _writer_aliases[writer_name]
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139 try:
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140 module = __import__(writer_name, globals(), locals(), level=1)
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141 except ImportError:
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142 module = __import__(writer_name, globals(), locals(), level=0)
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143 return module.Writer