Mercurial > repos > shellac > guppy_basecaller

annotate env/lib/python3.7/site-packages/docutils/transforms/universal.py @ 0:26e78fe6e8c4 draft

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"planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
author shellac
date Sat, 02 May 2020 07:14:21 -0400
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1 # $Id: universal.py 8393 2019-09-18 10:13:00Z milde $
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2 # -*- coding: utf-8 -*-
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3 # Authors: David Goodger <goodger@python.org>; Ueli Schlaepfer; Günter Milde
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4 # Maintainer: docutils-develop@lists.sourceforge.net
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5 # Copyright: This module has been placed in the public domain.
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6
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7 """
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8 Transforms needed by most or all documents:
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9
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10 - `Decorations`: Generate a document's header & footer.
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11 - `Messages`: Placement of system messages stored in
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12 `nodes.document.transform_messages`.
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13 - `TestMessages`: Like `Messages`, used on test runs.
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14 - `FinalReferences`: Resolve remaining references.
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15 """
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16
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17 __docformat__ = 'reStructuredText'
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18
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19 import re
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20 import sys
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21 import time
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22 from docutils import nodes, utils
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23 from docutils.transforms import TransformError, Transform
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24 from docutils.utils import smartquotes
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25
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26
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27 if sys.version_info >= (3, 0):
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28 unicode = str # noqa
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29
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30
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31 class Decorations(Transform):
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32
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33 """
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34 Populate a document's decoration element (header, footer).
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35 """
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36
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37 default_priority = 820
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38
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39 def apply(self):
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40 header_nodes = self.generate_header()
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41 if header_nodes:
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42 decoration = self.document.get_decoration()
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43 header = decoration.get_header()
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44 header.extend(header_nodes)
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45 footer_nodes = self.generate_footer()
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46 if footer_nodes:
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47 decoration = self.document.get_decoration()
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48 footer = decoration.get_footer()
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49 footer.extend(footer_nodes)
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50
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51 def generate_header(self):
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52 return None
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53
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54 def generate_footer(self):
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55 # @@@ Text is hard-coded for now.
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56 # Should be made dynamic (language-dependent).
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57 # @@@ Use timestamp from the `SOURCE_DATE_EPOCH`_ environment variable
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58 # for the datestamp?
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59 # See https://sourceforge.net/p/docutils/patches/132/
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60 # and https://reproducible-builds.org/specs/source-date-epoch/
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61 settings = self.document.settings
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62 if settings.generator or settings.datestamp or settings.source_link \
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63 or settings.source_url:
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64 text = []
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65 if settings.source_link and settings._source \
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66 or settings.source_url:
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67 if settings.source_url:
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68 source = settings.source_url
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69 else:
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70 source = utils.relative_path(settings._destination,
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71 settings._source)
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72 text.extend([
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73 nodes.reference('', 'View document source',
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74 refuri=source),
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75 nodes.Text('.\n')])
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76 if settings.datestamp:
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77 datestamp = time.strftime(settings.datestamp, time.gmtime())
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78 text.append(nodes.Text('Generated on: ' + datestamp + '.\n'))
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79 if settings.generator:
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80 text.extend([
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81 nodes.Text('Generated by '),
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82 nodes.reference('', 'Docutils', refuri=
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83 'http://docutils.sourceforge.net/'),
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84 nodes.Text(' from '),
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85 nodes.reference('', 'reStructuredText', refuri='http://'
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86 'docutils.sourceforge.net/rst.html'),
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87 nodes.Text(' source.\n')])
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88 return [nodes.paragraph('', '', *text)]
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89 else:
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90 return None
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91
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92
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93 class ExposeInternals(Transform):
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94
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95 """
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96 Expose internal attributes if ``expose_internals`` setting is set.
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97 """
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98
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99 default_priority = 840
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100
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101 def not_Text(self, node):
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102 return not isinstance(node, nodes.Text)
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103
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104 def apply(self):
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105 if self.document.settings.expose_internals:
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106 for node in self.document.traverse(self.not_Text):
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107 for att in self.document.settings.expose_internals:
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108 value = getattr(node, att, None)
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109 if value is not None:
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110 node['internal:' + att] = value
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111
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112
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113 class Messages(Transform):
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114
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115 """
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116 Place any system messages generated after parsing into a dedicated section
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117 of the document.
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118 """
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119
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120 default_priority = 860
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121
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122 def apply(self):
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123 unfiltered = self.document.transform_messages
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124 threshold = self.document.reporter.report_level
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125 messages = []
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126 for msg in unfiltered:
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127 if msg['level'] >= threshold and not msg.parent:
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128 messages.append(msg)
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129 if messages:
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130 section = nodes.section(classes=['system-messages'])
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131 # @@@ get this from the language module?
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132 section += nodes.title('', 'Docutils System Messages')
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133 section += messages
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134 self.document.transform_messages[:] = []
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135 self.document += section
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136
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137
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138 class FilterMessages(Transform):
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139
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140 """
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141 Remove system messages below verbosity threshold.
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142 """
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143
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144 default_priority = 870
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145
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146 def apply(self):
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147 for node in tuple(self.document.traverse(nodes.system_message)):
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148 if node['level'] < self.document.reporter.report_level:
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149 node.parent.remove(node)
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150
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151
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152 class TestMessages(Transform):
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153
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154 """
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155 Append all post-parse system messages to the end of the document.
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156
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157 Used for testing purposes.
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158 """
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159
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160 default_priority = 880
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161
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162 def apply(self):
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163 for msg in self.document.transform_messages:
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164 if not msg.parent:
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165 self.document += msg
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166
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167
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168 class StripComments(Transform):
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169
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170 """
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171 Remove comment elements from the document tree (only if the
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172 ``strip_comments`` setting is enabled).
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173 """
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174
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175 default_priority = 740
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176
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177 def apply(self):
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178 if self.document.settings.strip_comments:
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179 for node in tuple(self.document.traverse(nodes.comment)):
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180 node.parent.remove(node)
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181
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182
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183 class StripClassesAndElements(Transform):
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184
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185 """
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186 Remove from the document tree all elements with classes in
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187 `self.document.settings.strip_elements_with_classes` and all "classes"
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188 attribute values in `self.document.settings.strip_classes`.
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189 """
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190
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191 default_priority = 420
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192
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193 def apply(self):
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194 if self.document.settings.strip_elements_with_classes:
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195 self.strip_elements = set(
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196 self.document.settings.strip_elements_with_classes)
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197 # Iterate over a tuple as removing the current node
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198 # corrupts the iterator returned by `traverse`:
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199 for node in tuple(self.document.traverse(self.check_classes)):
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200 node.parent.remove(node)
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201
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202 if not self.document.settings.strip_classes:
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203 return
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204 strip_classes = self.document.settings.strip_classes
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205 for node in self.document.traverse(nodes.Element):
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206 for class_value in strip_classes:
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207 try:
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208 node['classes'].remove(class_value)
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209 except ValueError:
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210 pass
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211
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212 def check_classes(self, node):
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213 if not isinstance(node, nodes.Element):
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214 return False
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215 for class_value in node['classes'][:]:
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216 if class_value in self.strip_elements:
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217 return True
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218 return False
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219
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220
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221 class SmartQuotes(Transform):
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222
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223 """
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224 Replace ASCII quotation marks with typographic form.
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225
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226 Also replace multiple dashes with em-dash/en-dash characters.
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227 """
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228
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229 default_priority = 850
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230
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231 nodes_to_skip = (nodes.FixedTextElement, nodes.Special)
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232 """Do not apply "smartquotes" to instances of these block-level nodes."""
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233
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234 literal_nodes = (nodes.FixedTextElement, nodes.Special,
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235 nodes.image, nodes.literal, nodes.math,
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236 nodes.raw, nodes.problematic)
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237 """Do apply smartquotes to instances of these inline nodes."""
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238
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239 smartquotes_action = 'qDe'
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240 """Setting to select smartquote transformations.
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241
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242 The default 'qDe' educates normal quote characters: (", '),
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243 em- and en-dashes (---, --) and ellipses (...).
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244 """
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245
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246 def __init__(self, document, startnode):
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247 Transform.__init__(self, document, startnode=startnode)
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248 self.unsupported_languages = set()
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249
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250 def get_tokens(self, txtnodes):
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251 # A generator that yields ``(texttype, nodetext)`` tuples for a list
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252 # of "Text" nodes (interface to ``smartquotes.educate_tokens()``).
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253 for node in txtnodes:
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254 if (isinstance(node.parent, self.literal_nodes)
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255 or isinstance(node.parent.parent, self.literal_nodes)):
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256 yield ('literal', unicode(node))
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257 else:
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258 # SmartQuotes uses backslash escapes instead of null-escapes
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259 txt = re.sub('(?<=\x00)([-\\\'".`])', r'\\\1', unicode(node))
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260 yield ('plain', txt)
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261
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262 def apply(self):
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263 smart_quotes = self.document.settings.smart_quotes
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264 if not smart_quotes:
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265 return
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266 try:
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267 alternative = smart_quotes.startswith('alt')
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268 except AttributeError:
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269 alternative = False
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270
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271 document_language = self.document.settings.language_code
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272 lc_smartquotes = self.document.settings.smartquotes_locales
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273 if lc_smartquotes:
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274 smartquotes.smartchars.quotes.update(dict(lc_smartquotes))
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275
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276 # "Educate" quotes in normal text. Handle each block of text
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277 # (TextElement node) as a unit to keep context around inline nodes:
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278 for node in self.document.traverse(nodes.TextElement):
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279 # skip preformatted text blocks and special elements:
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280 if isinstance(node, self.nodes_to_skip):
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281 continue
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282 # nested TextElements are not "block-level" elements:
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283 if isinstance(node.parent, nodes.TextElement):
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284 continue
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285
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286 # list of text nodes in the "text block":
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287 txtnodes = [txtnode for txtnode in node.traverse(nodes.Text)
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288 if not isinstance(txtnode.parent,
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289 nodes.option_string)]
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290
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291 # language: use typographical quotes for language "lang"
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292 lang = node.get_language_code(document_language)
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293 # use alternative form if `smart-quotes` setting starts with "alt":
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294 if alternative:
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295 if '-x-altquot' in lang:
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296 lang = lang.replace('-x-altquot', '')
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297 else:
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298 lang += '-x-altquot'
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299 # drop unsupported subtags:
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300 for tag in utils.normalize_language_tag(lang):
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301 if tag in smartquotes.smartchars.quotes:
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302 lang = tag
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303 break
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304 else: # language not supported: (keep ASCII quotes)
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305 if lang not in self.unsupported_languages:
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306 self.document.reporter.warning('No smart quotes '
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307 'defined for language "%s".'%lang, base_node=node)
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308 self.unsupported_languages.add(lang)
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309 lang = ''
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310
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311 # Iterator educating quotes in plain text:
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312 # (see "utils/smartquotes.py" for the attribute setting)
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313 teacher = smartquotes.educate_tokens(self.get_tokens(txtnodes),
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314 attr=self.smartquotes_action, language=lang)
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315
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316 for txtnode, newtext in zip(txtnodes, teacher):
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317 txtnode.parent.replace(txtnode, nodes.Text(newtext,
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318 rawsource=txtnode.rawsource))
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319
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320 self.unsupported_languages = set() # reset