Mercurial > repos > bcclaywell > argo_navis

annotate venv/lib/python2.7/site-packages/docutils/transforms/universal.py @ 0:d67268158946 draft

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planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
author bcclaywell
date Mon, 12 Oct 2015 17:43:33 -0400
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1 # $Id: universal.py 7668 2013-06-04 12:46:30Z 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 class Decorations(Transform):
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27
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28 """
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29 Populate a document's decoration element (header, footer).
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30 """
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31
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32 default_priority = 820
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33
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34 def apply(self):
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35 header_nodes = self.generate_header()
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36 if header_nodes:
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37 decoration = self.document.get_decoration()
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38 header = decoration.get_header()
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39 header.extend(header_nodes)
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40 footer_nodes = self.generate_footer()
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41 if footer_nodes:
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42 decoration = self.document.get_decoration()
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43 footer = decoration.get_footer()
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44 footer.extend(footer_nodes)
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45
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46 def generate_header(self):
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47 return None
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48
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49 def generate_footer(self):
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50 # @@@ Text is hard-coded for now.
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51 # Should be made dynamic (language-dependent).
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52 settings = self.document.settings
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53 if settings.generator or settings.datestamp or settings.source_link \
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54 or settings.source_url:
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55 text = []
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56 if settings.source_link and settings._source \
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57 or settings.source_url:
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58 if settings.source_url:
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59 source = settings.source_url
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60 else:
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61 source = utils.relative_path(settings._destination,
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62 settings._source)
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63 text.extend([
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64 nodes.reference('', 'View document source',
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65 refuri=source),
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66 nodes.Text('.\n')])
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67 if settings.datestamp:
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68 datestamp = time.strftime(settings.datestamp, time.gmtime())
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69 text.append(nodes.Text('Generated on: ' + datestamp + '.\n'))
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70 if settings.generator:
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71 text.extend([
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72 nodes.Text('Generated by '),
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73 nodes.reference('', 'Docutils', refuri=
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74 'http://docutils.sourceforge.net/'),
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75 nodes.Text(' from '),
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76 nodes.reference('', 'reStructuredText', refuri='http://'
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77 'docutils.sourceforge.net/rst.html'),
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78 nodes.Text(' source.\n')])
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79 return [nodes.paragraph('', '', *text)]
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80 else:
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81 return None
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82
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83
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84 class ExposeInternals(Transform):
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85
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86 """
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87 Expose internal attributes if ``expose_internals`` setting is set.
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88 """
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89
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90 default_priority = 840
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91
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92 def not_Text(self, node):
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93 return not isinstance(node, nodes.Text)
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94
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95 def apply(self):
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96 if self.document.settings.expose_internals:
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97 for node in self.document.traverse(self.not_Text):
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98 for att in self.document.settings.expose_internals:
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99 value = getattr(node, att, None)
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100 if value is not None:
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101 node['internal:' + att] = value
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102
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103
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104 class Messages(Transform):
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105
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106 """
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107 Place any system messages generated after parsing into a dedicated section
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108 of the document.
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109 """
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110
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111 default_priority = 860
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112
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113 def apply(self):
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114 unfiltered = self.document.transform_messages
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115 threshold = self.document.reporter.report_level
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116 messages = []
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117 for msg in unfiltered:
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118 if msg['level'] >= threshold and not msg.parent:
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119 messages.append(msg)
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120 if messages:
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121 section = nodes.section(classes=['system-messages'])
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122 # @@@ get this from the language module?
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123 section += nodes.title('', 'Docutils System Messages')
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124 section += messages
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125 self.document.transform_messages[:] = []
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126 self.document += section
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127
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128
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129 class FilterMessages(Transform):
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130
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131 """
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132 Remove system messages below verbosity threshold.
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133 """
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134
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135 default_priority = 870
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136
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137 def apply(self):
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138 for node in self.document.traverse(nodes.system_message):
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139 if node['level'] < self.document.reporter.report_level:
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140 node.parent.remove(node)
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141
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142
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143 class TestMessages(Transform):
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144
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145 """
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146 Append all post-parse system messages to the end of the document.
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147
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148 Used for testing purposes.
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149 """
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150
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151 default_priority = 880
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152
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153 def apply(self):
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154 for msg in self.document.transform_messages:
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155 if not msg.parent:
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156 self.document += msg
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157
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158
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159 class StripComments(Transform):
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160
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161 """
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162 Remove comment elements from the document tree (only if the
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163 ``strip_comments`` setting is enabled).
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164 """
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165
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166 default_priority = 740
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167
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168 def apply(self):
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169 if self.document.settings.strip_comments:
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170 for node in self.document.traverse(nodes.comment):
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171 node.parent.remove(node)
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172
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173
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174 class StripClassesAndElements(Transform):
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175
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176 """
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177 Remove from the document tree all elements with classes in
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178 `self.document.settings.strip_elements_with_classes` and all "classes"
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179 attribute values in `self.document.settings.strip_classes`.
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180 """
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181
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182 default_priority = 420
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183
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184 def apply(self):
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185 if not (self.document.settings.strip_elements_with_classes
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186 or self.document.settings.strip_classes):
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187 return
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188 # prepare dicts for lookup (not sets, for Python 2.2 compatibility):
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189 self.strip_elements = dict(
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190 [(key, None)
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191 for key in (self.document.settings.strip_elements_with_classes
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192 or [])])
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193 self.strip_classes = dict(
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194 [(key, None) for key in (self.document.settings.strip_classes
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195 or [])])
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196 for node in self.document.traverse(self.check_classes):
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197 node.parent.remove(node)
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198
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199 def check_classes(self, node):
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200 if isinstance(node, nodes.Element):
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201 for class_value in node['classes'][:]:
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202 if class_value in self.strip_classes:
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203 node['classes'].remove(class_value)
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204 if class_value in self.strip_elements:
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205 return 1
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206
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207 class SmartQuotes(Transform):
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208
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209 """
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210 Replace ASCII quotation marks with typographic form.
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211
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212 Also replace multiple dashes with em-dash/en-dash characters.
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213 """
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214
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215 default_priority = 850
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216
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217 def __init__(self, document, startnode):
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218 Transform.__init__(self, document, startnode=startnode)
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219 self.unsupported_languages = set()
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220
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221 def get_tokens(self, txtnodes):
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222 # A generator that yields ``(texttype, nodetext)`` tuples for a list
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223 # of "Text" nodes (interface to ``smartquotes.educate_tokens()``).
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224
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225 texttype = {True: 'literal', # "literal" text is not changed:
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226 False: 'plain'}
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227 for txtnode in txtnodes:
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228 nodetype = texttype[isinstance(txtnode.parent,
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229 (nodes.literal,
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230 nodes.math,
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231 nodes.image,
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232 nodes.raw,
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233 nodes.problematic))]
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234 yield (nodetype, txtnode.astext())
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235
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236
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237 def apply(self):
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238 smart_quotes = self.document.settings.smart_quotes
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239 if not smart_quotes:
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240 return
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241 try:
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242 alternative = smart_quotes.startswith('alt')
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243 except AttributeError:
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244 alternative = False
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245 # print repr(alternative)
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246
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247 document_language = self.document.settings.language_code
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248
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249 # "Educate" quotes in normal text. Handle each block of text
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250 # (TextElement node) as a unit to keep context around inline nodes:
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251 for node in self.document.traverse(nodes.TextElement):
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252 # skip preformatted text blocks and special elements:
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253 if isinstance(node, (nodes.FixedTextElement, nodes.Special)):
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254 continue
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255 # nested TextElements are not "block-level" elements:
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256 if isinstance(node.parent, nodes.TextElement):
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257 continue
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258
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259 # list of text nodes in the "text block":
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260 txtnodes = [txtnode for txtnode in node.traverse(nodes.Text)
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261 if not isinstance(txtnode.parent,
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262 nodes.option_string)]
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263
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264 # language: use typographical quotes for language "lang"
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265 lang = node.get_language_code(document_language)
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266 # use alternative form if `smart-quotes` setting starts with "alt":
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267 if alternative:
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268 if '-x-altquot' in lang:
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269 lang = lang.replace('-x-altquot', '')
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270 else:
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271 lang += '-x-altquot'
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272 # drop subtags missing in quotes:
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273 for tag in utils.normalize_language_tag(lang):
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274 if tag in smartquotes.smartchars.quotes:
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275 lang = tag
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276 break
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277 else: # language not supported: (keep ASCII quotes)
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278 if lang not in self.unsupported_languages:
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279 self.document.reporter.warning('No smart quotes '
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280 'defined for language "%s".'%lang, base_node=node)
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281 self.unsupported_languages.add(lang)
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282 lang = ''
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283
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284 # Iterator educating quotes in plain text:
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285 # '2': set all, using old school en- and em- dash shortcuts
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286 teacher = smartquotes.educate_tokens(self.get_tokens(txtnodes),
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287 attr='2', language=lang)
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288
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289 for txtnode, newtext in zip(txtnodes, teacher):
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290 txtnode.parent.replace(txtnode, nodes.Text(newtext))
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291
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292 self.unsupported_languages = set() # reset