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53 lines
1.9 KiB
53 lines
1.9 KiB
2 weeks ago
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# $Id: components.py 4564 2006-05-21 20:44:42Z wiemann $
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# Author: David Goodger <goodger@python.org>
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# Copyright: This module has been placed in the public domain.
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"""
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Docutils component-related transforms.
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"""
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__docformat__ = 'reStructuredText'
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import sys
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import os
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import re
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import time
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from docutils import nodes, utils
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from docutils import ApplicationError, DataError
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from docutils.transforms import Transform, TransformError
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class Filter(Transform):
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"""
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Include or exclude elements which depend on a specific Docutils component.
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For use with `nodes.pending` elements. A "pending" element's dictionary
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attribute ``details`` must contain the keys "component" and "format". The
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value of ``details['component']`` must match the type name of the
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component the elements depend on (e.g. "writer"). The value of
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``details['format']`` is the name of a specific format or context of that
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component (e.g. "html"). If the matching Docutils component supports that
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format or context, the "pending" element is replaced by the contents of
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``details['nodes']`` (a list of nodes); otherwise, the "pending" element
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is removed.
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For example, the reStructuredText "meta" directive creates a "pending"
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element containing a "meta" element (in ``pending.details['nodes']``).
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Only writers (``pending.details['component'] == 'writer'``) supporting the
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"html" format (``pending.details['format'] == 'html'``) will include the
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"meta" element; it will be deleted from the output of all other writers.
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"""
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default_priority = 780
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def apply(self):
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pending = self.startnode
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component_type = pending.details['component'] # 'reader' or 'writer'
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format = pending.details['format']
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component = self.document.transformer.components[component_type]
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if component.supports(format):
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pending.replace_self(pending.details['nodes'])
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else:
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pending.parent.remove(pending)
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