forked from varia/varia.website
89 lines
3.2 KiB
Python
89 lines
3.2 KiB
Python
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# $Id: html.py 8347 2019-08-26 12:12:02Z milde $
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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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Directives for typically HTML-specific constructs.
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"""
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__docformat__ = 'reStructuredText'
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import sys
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from docutils import nodes, utils
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from docutils.parsers.rst import Directive
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from docutils.parsers.rst import states
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from docutils.transforms import components
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class MetaBody(states.SpecializedBody):
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class meta(nodes.Special, nodes.PreBibliographic, nodes.Element):
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"""HTML-specific "meta" element."""
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pass
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def field_marker(self, match, context, next_state):
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"""Meta element."""
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node, blank_finish = self.parsemeta(match)
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self.parent += node
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return [], next_state, []
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def parsemeta(self, match):
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name = self.parse_field_marker(match)
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name = utils.unescape(utils.escape2null(name))
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indented, indent, line_offset, blank_finish = \
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self.state_machine.get_first_known_indented(match.end())
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node = self.meta()
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pending = nodes.pending(components.Filter,
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{'component': 'writer',
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'format': 'html',
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'nodes': [node]})
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node['content'] = utils.unescape(utils.escape2null(
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' '.join(indented)))
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if not indented:
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line = self.state_machine.line
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msg = self.reporter.info(
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'No content for meta tag "%s".' % name,
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nodes.literal_block(line, line))
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return msg, blank_finish
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tokens = name.split()
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try:
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attname, val = utils.extract_name_value(tokens[0])[0]
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node[attname.lower()] = val
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except utils.NameValueError:
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node['name'] = tokens[0]
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for token in tokens[1:]:
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try:
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attname, val = utils.extract_name_value(token)[0]
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node[attname.lower()] = val
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except utils.NameValueError as detail:
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line = self.state_machine.line
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msg = self.reporter.error(
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'Error parsing meta tag attribute "%s": %s.'
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% (token, detail), nodes.literal_block(line, line))
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return msg, blank_finish
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self.document.note_pending(pending)
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return pending, blank_finish
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class Meta(Directive):
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has_content = True
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SMkwargs = {'state_classes': (MetaBody,)}
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def run(self):
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self.assert_has_content()
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node = nodes.Element()
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new_line_offset, blank_finish = self.state.nested_list_parse(
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self.content, self.content_offset, node,
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initial_state='MetaBody', blank_finish=True,
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state_machine_kwargs=self.SMkwargs)
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if (new_line_offset - self.content_offset) != len(self.content):
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# incomplete parse of block?
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error = self.state_machine.reporter.error(
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'Invalid meta directive.',
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nodes.literal_block(self.block_text, self.block_text),
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line=self.lineno)
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node += error
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return node.children
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