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annotate planemo/lib/python3.7/site-packages/docutils/transforms/misc.py @ 1:56ad4e20f292 draft

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"planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
author guerler
date Fri, 31 Jul 2020 00:32:28 -0400
parents d30785e31577
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1 # $Id: misc.py 6314 2010-04-26 10:04:17Z 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 Miscellaneous transforms.
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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 from docutils import nodes
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12 from docutils.transforms import Transform, TransformError
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13
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14
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15 class CallBack(Transform):
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16
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17 """
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18 Inserts a callback into a document. The callback is called when the
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19 transform is applied, which is determined by its priority.
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20
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21 For use with `nodes.pending` elements. Requires a ``details['callback']``
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22 entry, a bound method or function which takes one parameter: the pending
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23 node. Other data can be stored in the ``details`` attribute or in the
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24 object hosting the callback method.
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25 """
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26
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27 default_priority = 990
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28
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29 def apply(self):
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30 pending = self.startnode
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31 pending.details['callback'](pending)
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32 pending.parent.remove(pending)
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33
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34
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35 class ClassAttribute(Transform):
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36
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37 """
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38 Move the "class" attribute specified in the "pending" node into the
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39 immediately following non-comment element.
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40 """
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41
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42 default_priority = 210
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43
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44 def apply(self):
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45 pending = self.startnode
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46 parent = pending.parent
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47 child = pending
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48 while parent:
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49 # Check for appropriate following siblings:
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50 for index in range(parent.index(child) + 1, len(parent)):
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51 element = parent[index]
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52 if (isinstance(element, nodes.Invisible) or
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53 isinstance(element, nodes.system_message)):
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54 continue
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55 element['classes'] += pending.details['class']
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56 pending.parent.remove(pending)
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57 return
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58 else:
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59 # At end of section or container; apply to sibling
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60 child = parent
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61 parent = parent.parent
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62 error = self.document.reporter.error(
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63 'No suitable element following "%s" directive'
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64 % pending.details['directive'],
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65 nodes.literal_block(pending.rawsource, pending.rawsource),
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66 line=pending.line)
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67 pending.replace_self(error)
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68
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69
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70 class Transitions(Transform):
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71
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72 """
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73 Move transitions at the end of sections up the tree. Complain
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74 on transitions after a title, at the beginning or end of the
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75 document, and after another transition.
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76
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77 For example, transform this::
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78
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79 <section>
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80 ...
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81 <transition>
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82 <section>
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83 ...
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84
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85 into this::
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86
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87 <section>
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88 ...
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89 <transition>
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90 <section>
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91 ...
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92 """
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93
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94 default_priority = 830
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95
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96 def apply(self):
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97 for node in self.document.traverse(nodes.transition):
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98 self.visit_transition(node)
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99
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100 def visit_transition(self, node):
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101 index = node.parent.index(node)
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102 error = None
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103 if (index == 0 or
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104 isinstance(node.parent[0], nodes.title) and
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105 (index == 1 or
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106 isinstance(node.parent[1], nodes.subtitle) and
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107 index == 2)):
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108 assert (isinstance(node.parent, nodes.document) or
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109 isinstance(node.parent, nodes.section))
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110 error = self.document.reporter.error(
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111 'Document or section may not begin with a transition.',
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112 source=node.source, line=node.line)
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113 elif isinstance(node.parent[index - 1], nodes.transition):
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114 error = self.document.reporter.error(
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115 'At least one body element must separate transitions; '
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116 'adjacent transitions are not allowed.',
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117 source=node.source, line=node.line)
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118 if error:
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119 # Insert before node and update index.
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120 node.parent.insert(index, error)
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121 index += 1
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122 assert index < len(node.parent)
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123 if index != len(node.parent) - 1:
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124 # No need to move the node.
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125 return
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126 # Node behind which the transition is to be moved.
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127 sibling = node
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128 # While sibling is the last node of its parent.
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129 while index == len(sibling.parent) - 1:
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130 sibling = sibling.parent
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131 # If sibling is the whole document (i.e. it has no parent).
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132 if sibling.parent is None:
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133 # Transition at the end of document. Do not move the
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134 # transition up, and place an error behind.
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135 error = self.document.reporter.error(
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136 'Document may not end with a transition.',
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137 line=node.line)
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138 node.parent.insert(node.parent.index(node) + 1, error)
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139 return
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140 index = sibling.parent.index(sibling)
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141 # Remove the original transition node.
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142 node.parent.remove(node)
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143 # Insert the transition after the sibling.
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144 sibling.parent.insert(index + 1, node)