annotate env/lib/python3.7/site-packages/docutils/transforms/components.py @ 4:79f47841a781 draft

"planemo upload commit 2a0fe2cc28b09e101d37293e53e82f61762262ec"
author shellac
date Thu, 14 May 2020 16:47:39 -0400
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1 # $Id: components.py 4564 2006-05-21 20:44:42Z wiemann $
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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 Docutils component-related 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 import sys
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12 import os
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13 import re
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14 import time
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15 from docutils import nodes, utils
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16 from docutils import ApplicationError, DataError
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17 from docutils.transforms import Transform, TransformError
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18
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19
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20 class Filter(Transform):
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21
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22 """
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23 Include or exclude elements which depend on a specific Docutils component.
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24
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25 For use with `nodes.pending` elements. A "pending" element's dictionary
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26 attribute ``details`` must contain the keys "component" and "format". The
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27 value of ``details['component']`` must match the type name of the
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28 component the elements depend on (e.g. "writer"). The value of
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29 ``details['format']`` is the name of a specific format or context of that
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30 component (e.g. "html"). If the matching Docutils component supports that
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31 format or context, the "pending" element is replaced by the contents of
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32 ``details['nodes']`` (a list of nodes); otherwise, the "pending" element
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33 is removed.
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34
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35 For example, the reStructuredText "meta" directive creates a "pending"
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36 element containing a "meta" element (in ``pending.details['nodes']``).
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37 Only writers (``pending.details['component'] == 'writer'``) supporting the
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38 "html" format (``pending.details['format'] == 'html'``) will include the
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39 "meta" element; it will be deleted from the output of all other writers.
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40 """
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41
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42 default_priority = 780
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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 component_type = pending.details['component'] # 'reader' or 'writer'
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47 format = pending.details['format']
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48 component = self.document.transformer.components[component_type]
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49 if component.supports(format):
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50 pending.replace_self(pending.details['nodes'])
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51 else:
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52 pending.parent.remove(pending)