forked from varia/varia.website
557 lines
23 KiB
Python
557 lines
23 KiB
Python
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# $Id: misc.py 8370 2019-08-27 12:10:39Z milde $
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# Authors: David Goodger <goodger@python.org>; Dethe Elza
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# Copyright: This module has been placed in the public domain.
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"""Miscellaneous directives."""
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__docformat__ = 'reStructuredText'
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import sys
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import os.path
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import re
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import time
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from docutils import io, nodes, statemachine, utils
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from docutils.utils.error_reporting import SafeString, ErrorString
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from docutils.utils.error_reporting import locale_encoding
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from docutils.parsers.rst import Directive, convert_directive_function
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from docutils.parsers.rst import directives, roles, states
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from docutils.parsers.rst.directives.body import CodeBlock, NumberLines
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from docutils.parsers.rst.roles import set_classes
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from docutils.transforms import misc
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class Include(Directive):
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"""
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Include content read from a separate source file.
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Content may be parsed by the parser, or included as a literal
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block. The encoding of the included file can be specified. Only
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a part of the given file argument may be included by specifying
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start and end line or text to match before and/or after the text
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to be used.
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"""
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required_arguments = 1
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optional_arguments = 0
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final_argument_whitespace = True
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option_spec = {'literal': directives.flag,
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'code': directives.unchanged,
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'encoding': directives.encoding,
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'tab-width': int,
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'start-line': int,
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'end-line': int,
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'start-after': directives.unchanged_required,
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'end-before': directives.unchanged_required,
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# ignored except for 'literal' or 'code':
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'number-lines': directives.unchanged, # integer or None
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'class': directives.class_option,
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'name': directives.unchanged}
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standard_include_path = os.path.join(os.path.dirname(states.__file__),
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'include')
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def run(self):
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"""Include a file as part of the content of this reST file."""
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if not self.state.document.settings.file_insertion_enabled:
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raise self.warning('"%s" directive disabled.' % self.name)
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source = self.state_machine.input_lines.source(
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self.lineno - self.state_machine.input_offset - 1)
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source_dir = os.path.dirname(os.path.abspath(source))
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path = directives.path(self.arguments[0])
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if path.startswith('<') and path.endswith('>'):
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path = os.path.join(self.standard_include_path, path[1:-1])
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path = os.path.normpath(os.path.join(source_dir, path))
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path = utils.relative_path(None, path)
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path = nodes.reprunicode(path)
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encoding = self.options.get(
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'encoding', self.state.document.settings.input_encoding)
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e_handler=self.state.document.settings.input_encoding_error_handler
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tab_width = self.options.get(
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'tab-width', self.state.document.settings.tab_width)
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try:
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self.state.document.settings.record_dependencies.add(path)
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include_file = io.FileInput(source_path=path,
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encoding=encoding,
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error_handler=e_handler)
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except UnicodeEncodeError as error:
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raise self.severe(u'Problems with "%s" directive path:\n'
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'Cannot encode input file path "%s" '
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'(wrong locale?).' %
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(self.name, SafeString(path)))
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except IOError as error:
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raise self.severe(u'Problems with "%s" directive path:\n%s.' %
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(self.name, ErrorString(error)))
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startline = self.options.get('start-line', None)
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endline = self.options.get('end-line', None)
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try:
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if startline or (endline is not None):
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lines = include_file.readlines()
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rawtext = ''.join(lines[startline:endline])
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else:
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rawtext = include_file.read()
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except UnicodeError as error:
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raise self.severe(u'Problem with "%s" directive:\n%s' %
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(self.name, ErrorString(error)))
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# start-after/end-before: no restrictions on newlines in match-text,
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# and no restrictions on matching inside lines vs. line boundaries
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after_text = self.options.get('start-after', None)
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if after_text:
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# skip content in rawtext before *and incl.* a matching text
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after_index = rawtext.find(after_text)
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if after_index < 0:
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raise self.severe('Problem with "start-after" option of "%s" '
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'directive:\nText not found.' % self.name)
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rawtext = rawtext[after_index + len(after_text):]
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before_text = self.options.get('end-before', None)
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if before_text:
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# skip content in rawtext after *and incl.* a matching text
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before_index = rawtext.find(before_text)
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if before_index < 0:
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raise self.severe('Problem with "end-before" option of "%s" '
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'directive:\nText not found.' % self.name)
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rawtext = rawtext[:before_index]
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include_lines = statemachine.string2lines(rawtext, tab_width,
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convert_whitespace=True)
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if 'literal' in self.options:
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# Don't convert tabs to spaces, if `tab_width` is positive.
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if tab_width >= 0:
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text = rawtext.expandtabs(tab_width)
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else:
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text = rawtext
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literal_block = nodes.literal_block(rawtext, source=path,
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classes=self.options.get('class', []))
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literal_block.line = 1
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self.add_name(literal_block)
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if 'number-lines' in self.options:
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try:
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startline = int(self.options['number-lines'] or 1)
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except ValueError:
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raise self.error(':number-lines: with non-integer '
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'start value')
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endline = startline + len(include_lines)
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if text.endswith('\n'):
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text = text[:-1]
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tokens = NumberLines([([], text)], startline, endline)
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for classes, value in tokens:
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if classes:
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literal_block += nodes.inline(value, value,
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classes=classes)
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else:
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literal_block += nodes.Text(value)
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else:
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literal_block += nodes.Text(text)
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return [literal_block]
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if 'code' in self.options:
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self.options['source'] = path
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# Don't convert tabs to spaces, if `tab_width` is negative:
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if tab_width < 0:
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include_lines = rawtext.splitlines()
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codeblock = CodeBlock(self.name,
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[self.options.pop('code')], # arguments
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self.options,
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include_lines, # content
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self.lineno,
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self.content_offset,
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self.block_text,
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self.state,
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self.state_machine)
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return codeblock.run()
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self.state_machine.insert_input(include_lines, path)
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return []
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class Raw(Directive):
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"""
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Pass through content unchanged
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Content is included in output based on type argument
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Content may be included inline (content section of directive) or
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imported from a file or url.
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"""
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required_arguments = 1
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optional_arguments = 0
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final_argument_whitespace = True
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option_spec = {'file': directives.path,
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'url': directives.uri,
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'encoding': directives.encoding}
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has_content = True
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def run(self):
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if (not self.state.document.settings.raw_enabled
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or (not self.state.document.settings.file_insertion_enabled
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and ('file' in self.options
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or 'url' in self.options))):
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raise self.warning('"%s" directive disabled.' % self.name)
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attributes = {'format': ' '.join(self.arguments[0].lower().split())}
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encoding = self.options.get(
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'encoding', self.state.document.settings.input_encoding)
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e_handler=self.state.document.settings.input_encoding_error_handler
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if self.content:
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if 'file' in self.options or 'url' in self.options:
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raise self.error(
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'"%s" directive may not both specify an external file '
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'and have content.' % self.name)
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text = '\n'.join(self.content)
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elif 'file' in self.options:
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if 'url' in self.options:
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raise self.error(
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'The "file" and "url" options may not be simultaneously '
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'specified for the "%s" directive.' % self.name)
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source_dir = os.path.dirname(
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os.path.abspath(self.state.document.current_source))
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path = os.path.normpath(os.path.join(source_dir,
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self.options['file']))
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path = utils.relative_path(None, path)
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try:
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raw_file = io.FileInput(source_path=path,
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encoding=encoding,
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error_handler=e_handler)
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# TODO: currently, raw input files are recorded as
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# dependencies even if not used for the chosen output format.
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self.state.document.settings.record_dependencies.add(path)
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except IOError as error:
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raise self.severe(u'Problems with "%s" directive path:\n%s.'
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% (self.name, ErrorString(error)))
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try:
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text = raw_file.read()
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except UnicodeError as error:
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raise self.severe(u'Problem with "%s" directive:\n%s'
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% (self.name, ErrorString(error)))
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attributes['source'] = path
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elif 'url' in self.options:
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source = self.options['url']
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# Do not import urllib2 at the top of the module because
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# it may fail due to broken SSL dependencies, and it takes
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# about 0.15 seconds to load.
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if sys.version_info >= (3, 0):
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from urllib.request import urlopen
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from urllib.error import URLError
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else:
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from urllib2 import urlopen, URLError
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try:
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raw_text = urlopen(source).read()
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except (URLError, IOError, OSError) as error:
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raise self.severe(u'Problems with "%s" directive URL "%s":\n%s.'
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% (self.name, self.options['url'], ErrorString(error)))
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raw_file = io.StringInput(source=raw_text, source_path=source,
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encoding=encoding,
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error_handler=e_handler)
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try:
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text = raw_file.read()
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except UnicodeError as error:
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raise self.severe(u'Problem with "%s" directive:\n%s'
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% (self.name, ErrorString(error)))
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attributes['source'] = source
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else:
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# This will always fail because there is no content.
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self.assert_has_content()
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raw_node = nodes.raw('', text, **attributes)
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(raw_node.source,
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raw_node.line) = self.state_machine.get_source_and_line(self.lineno)
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return [raw_node]
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class Replace(Directive):
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has_content = True
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def run(self):
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if not isinstance(self.state, states.SubstitutionDef):
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raise self.error(
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'Invalid context: the "%s" directive can only be used within '
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'a substitution definition.' % self.name)
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self.assert_has_content()
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text = '\n'.join(self.content)
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element = nodes.Element(text)
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self.state.nested_parse(self.content, self.content_offset,
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element)
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# element might contain [paragraph] + system_message(s)
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node = None
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messages = []
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for elem in element:
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if not node and isinstance(elem, nodes.paragraph):
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node = elem
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elif isinstance(elem, nodes.system_message):
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elem['backrefs'] = []
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messages.append(elem)
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else:
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return [
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self.state_machine.reporter.error(
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'Error in "%s" directive: may contain a single paragraph '
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'only.' % (self.name), line=self.lineno) ]
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if node:
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return messages + node.children
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return messages
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class Unicode(Directive):
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r"""
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Convert Unicode character codes (numbers) to characters. Codes may be
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decimal numbers, hexadecimal numbers (prefixed by ``0x``, ``x``, ``\x``,
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``U+``, ``u``, or ``\u``; e.g. ``U+262E``), or XML-style numeric character
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entities (e.g. ``☮``). Text following ".." is a comment and is
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ignored. Spaces are ignored, and any other text remains as-is.
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"""
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required_arguments = 1
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optional_arguments = 0
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final_argument_whitespace = True
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option_spec = {'trim': directives.flag,
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'ltrim': directives.flag,
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'rtrim': directives.flag}
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comment_pattern = re.compile(r'( |\n|^)\.\. ')
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def run(self):
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if not isinstance(self.state, states.SubstitutionDef):
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raise self.error(
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'Invalid context: the "%s" directive can only be used within '
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'a substitution definition.' % self.name)
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substitution_definition = self.state_machine.node
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if 'trim' in self.options:
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substitution_definition.attributes['ltrim'] = 1
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substitution_definition.attributes['rtrim'] = 1
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if 'ltrim' in self.options:
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substitution_definition.attributes['ltrim'] = 1
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if 'rtrim' in self.options:
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substitution_definition.attributes['rtrim'] = 1
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codes = self.comment_pattern.split(self.arguments[0])[0].split()
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element = nodes.Element()
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for code in codes:
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try:
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decoded = directives.unicode_code(code)
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except ValueError as error:
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raise self.error(u'Invalid character code: %s\n%s'
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% (code, ErrorString(error)))
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element += nodes.Text(decoded)
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return element.children
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class Class(Directive):
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"""
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Set a "class" attribute on the directive content or the next element.
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When applied to the next element, a "pending" element is inserted, and a
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transform does the work later.
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"""
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required_arguments = 1
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optional_arguments = 0
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final_argument_whitespace = True
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has_content = True
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def run(self):
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try:
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class_value = directives.class_option(self.arguments[0])
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except ValueError:
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raise self.error(
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'Invalid class attribute value for "%s" directive: "%s".'
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% (self.name, self.arguments[0]))
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node_list = []
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if self.content:
|
||
|
|
container = nodes.Element()
|
||
|
|
self.state.nested_parse(self.content, self.content_offset,
|
||
|
|
container)
|
||
|
|
for node in container:
|
||
|
|
node['classes'].extend(class_value)
|
||
|
|
node_list.extend(container.children)
|
||
|
|
else:
|
||
|
|
pending = nodes.pending(
|
||
|
|
misc.ClassAttribute,
|
||
|
|
{'class': class_value, 'directive': self.name},
|
||
|
|
self.block_text)
|
||
|
|
self.state_machine.document.note_pending(pending)
|
||
|
|
node_list.append(pending)
|
||
|
|
return node_list
|
||
|
|
|
||
|
|
|
||
|
|
class Role(Directive):
|
||
|
|
|
||
|
|
has_content = True
|
||
|
|
|
||
|
|
argument_pattern = re.compile(r'(%s)\s*(\(\s*(%s)\s*\)\s*)?$'
|
||
|
|
% ((states.Inliner.simplename,) * 2))
|
||
|
|
|
||
|
|
def run(self):
|
||
|
|
"""Dynamically create and register a custom interpreted text role."""
|
||
|
|
if self.content_offset > self.lineno or not self.content:
|
||
|
|
raise self.error('"%s" directive requires arguments on the first '
|
||
|
|
'line.' % self.name)
|
||
|
|
args = self.content[0]
|
||
|
|
match = self.argument_pattern.match(args)
|
||
|
|
if not match:
|
||
|
|
raise self.error('"%s" directive arguments not valid role names: '
|
||
|
|
'"%s".' % (self.name, args))
|
||
|
|
new_role_name = match.group(1)
|
||
|
|
base_role_name = match.group(3)
|
||
|
|
messages = []
|
||
|
|
if base_role_name:
|
||
|
|
base_role, messages = roles.role(
|
||
|
|
base_role_name, self.state_machine.language, self.lineno,
|
||
|
|
self.state.reporter)
|
||
|
|
if base_role is None:
|
||
|
|
error = self.state.reporter.error(
|
||
|
|
'Unknown interpreted text role "%s".' % base_role_name,
|
||
|
|
nodes.literal_block(self.block_text, self.block_text),
|
||
|
|
line=self.lineno)
|
||
|
|
return messages + [error]
|
||
|
|
else:
|
||
|
|
base_role = roles.generic_custom_role
|
||
|
|
assert not hasattr(base_role, 'arguments'), (
|
||
|
|
'Supplemental directive arguments for "%s" directive not '
|
||
|
|
'supported (specified by "%r" role).' % (self.name, base_role))
|
||
|
|
try:
|
||
|
|
converted_role = convert_directive_function(base_role)
|
||
|
|
(arguments, options, content, content_offset) = (
|
||
|
|
self.state.parse_directive_block(
|
||
|
|
self.content[1:], self.content_offset, converted_role,
|
||
|
|
option_presets={}))
|
||
|
|
except states.MarkupError as detail:
|
||
|
|
error = self.state_machine.reporter.error(
|
||
|
|
'Error in "%s" directive:\n%s.' % (self.name, detail),
|
||
|
|
nodes.literal_block(self.block_text, self.block_text),
|
||
|
|
line=self.lineno)
|
||
|
|
return messages + [error]
|
||
|
|
if 'class' not in options:
|
||
|
|
try:
|
||
|
|
options['class'] = directives.class_option(new_role_name)
|
||
|
|
except ValueError as detail:
|
||
|
|
error = self.state_machine.reporter.error(
|
||
|
|
u'Invalid argument for "%s" directive:\n%s.'
|
||
|
|
% (self.name, SafeString(detail)), nodes.literal_block(
|
||
|
|
self.block_text, self.block_text), line=self.lineno)
|
||
|
|
return messages + [error]
|
||
|
|
role = roles.CustomRole(new_role_name, base_role, options, content)
|
||
|
|
roles.register_local_role(new_role_name, role)
|
||
|
|
return messages
|
||
|
|
|
||
|
|
|
||
|
|
class DefaultRole(Directive):
|
||
|
|
|
||
|
|
"""Set the default interpreted text role."""
|
||
|
|
|
||
|
|
optional_arguments = 1
|
||
|
|
final_argument_whitespace = False
|
||
|
|
|
||
|
|
def run(self):
|
||
|
|
if not self.arguments:
|
||
|
|
if '' in roles._roles:
|
||
|
|
# restore the "default" default role
|
||
|
|
del roles._roles['']
|
||
|
|
return []
|
||
|
|
role_name = self.arguments[0]
|
||
|
|
role, messages = roles.role(role_name, self.state_machine.language,
|
||
|
|
self.lineno, self.state.reporter)
|
||
|
|
if role is None:
|
||
|
|
error = self.state.reporter.error(
|
||
|
|
'Unknown interpreted text role "%s".' % role_name,
|
||
|
|
nodes.literal_block(self.block_text, self.block_text),
|
||
|
|
line=self.lineno)
|
||
|
|
return messages + [error]
|
||
|
|
roles._roles[''] = role
|
||
|
|
return messages
|
||
|
|
|
||
|
|
|
||
|
|
class Title(Directive):
|
||
|
|
|
||
|
|
required_arguments = 1
|
||
|
|
optional_arguments = 0
|
||
|
|
final_argument_whitespace = True
|
||
|
|
|
||
|
|
def run(self):
|
||
|
|
self.state_machine.document['title'] = self.arguments[0]
|
||
|
|
return []
|
||
|
|
|
||
|
|
|
||
|
|
class Date(Directive):
|
||
|
|
|
||
|
|
has_content = True
|
||
|
|
|
||
|
|
def run(self):
|
||
|
|
if not isinstance(self.state, states.SubstitutionDef):
|
||
|
|
raise self.error(
|
||
|
|
'Invalid context: the "%s" directive can only be used within '
|
||
|
|
'a substitution definition.' % self.name)
|
||
|
|
format_str = '\n'.join(self.content) or '%Y-%m-%d'
|
||
|
|
if sys.version_info< (3, 0):
|
||
|
|
try:
|
||
|
|
format_str = format_str.encode(locale_encoding or 'utf-8')
|
||
|
|
except UnicodeEncodeError:
|
||
|
|
raise self.warning(u'Cannot encode date format string '
|
||
|
|
u'with locale encoding "%s".' % locale_encoding)
|
||
|
|
# @@@
|
||
|
|
# Use timestamp from the `SOURCE_DATE_EPOCH`_ environment variable?
|
||
|
|
# Pro: Docutils-generated documentation
|
||
|
|
# can easily be part of `reproducible software builds`__
|
||
|
|
#
|
||
|
|
# __ https://reproducible-builds.org/
|
||
|
|
#
|
||
|
|
# Con: Changes the specs, hard to predict behaviour,
|
||
|
|
#
|
||
|
|
# See also the discussion about \date \time \year in TeX
|
||
|
|
# http://tug.org/pipermail/tex-k/2016-May/002704.html
|
||
|
|
# source_date_epoch = os.environ.get('SOURCE_DATE_EPOCH')
|
||
|
|
# if (source_date_epoch):
|
||
|
|
# text = time.strftime(format_str,
|
||
|
|
# time.gmtime(int(source_date_epoch)))
|
||
|
|
# else:
|
||
|
|
text = time.strftime(format_str)
|
||
|
|
if sys.version_info< (3, 0):
|
||
|
|
# `text` is a byte string that may contain non-ASCII characters:
|
||
|
|
try:
|
||
|
|
text = text.decode(locale_encoding or 'utf-8')
|
||
|
|
except UnicodeDecodeError:
|
||
|
|
text = text.decode(locale_encoding or 'utf-8', 'replace')
|
||
|
|
raise self.warning(u'Error decoding "%s"'
|
||
|
|
u'with locale encoding "%s".' % (text, locale_encoding))
|
||
|
|
return [nodes.Text(text)]
|
||
|
|
|
||
|
|
|
||
|
|
class TestDirective(Directive):
|
||
|
|
|
||
|
|
"""This directive is useful only for testing purposes."""
|
||
|
|
|
||
|
|
optional_arguments = 1
|
||
|
|
final_argument_whitespace = True
|
||
|
|
option_spec = {'option': directives.unchanged_required}
|
||
|
|
has_content = True
|
||
|
|
|
||
|
|
def run(self):
|
||
|
|
if self.content:
|
||
|
|
text = '\n'.join(self.content)
|
||
|
|
info = self.state_machine.reporter.info(
|
||
|
|
'Directive processed. Type="%s", arguments=%r, options=%r, '
|
||
|
|
'content:' % (self.name, self.arguments, self.options),
|
||
|
|
nodes.literal_block(text, text), line=self.lineno)
|
||
|
|
else:
|
||
|
|
info = self.state_machine.reporter.info(
|
||
|
|
'Directive processed. Type="%s", arguments=%r, options=%r, '
|
||
|
|
'content: None' % (self.name, self.arguments, self.options),
|
||
|
|
line=self.lineno)
|
||
|
|
return [info]
|
||
|
|
|
||
|
|
# Old-style, functional definition:
|
||
|
|
#
|
||
|
|
# def directive_test_function(name, arguments, options, content, lineno,
|
||
|
|
# content_offset, block_text, state, state_machine):
|
||
|
|
# """This directive is useful only for testing purposes."""
|
||
|
|
# if content:
|
||
|
|
# text = '\n'.join(content)
|
||
|
|
# info = state_machine.reporter.info(
|
||
|
|
# 'Directive processed. Type="%s", arguments=%r, options=%r, '
|
||
|
|
# 'content:' % (name, arguments, options),
|
||
|
|
# nodes.literal_block(text, text), line=lineno)
|
||
|
|
# else:
|
||
|
|
# info = state_machine.reporter.info(
|
||
|
|
# 'Directive processed. Type="%s", arguments=%r, options=%r, '
|
||
|
|
# 'content: None' % (name, arguments, options), line=lineno)
|
||
|
|
# return [info]
|
||
|
|
#
|
||
|
|
# directive_test_function.arguments = (0, 1, 1)
|
||
|
|
# directive_test_function.options = {'option': directives.unchanged_required}
|
||
|
|
# directive_test_function.content = 1
|