/usr/lib/python3/dist-packages/recommonmark/parser.py is in python3-recommonmark 0.4.0+ds-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 | from contextlib import contextmanager
import itertools
from docutils import parsers, nodes
from CommonMark_bkrs import DocParser, HTMLRenderer
from warnings import warn
__all__ = ['CommonMarkParser']
def flatten(iterator):
return itertools.chain.from_iterable(iterator)
class _SectionHandler(object):
def __init__(self, document):
self._level_to_elem = {0: document}
def _parent_elem(self, child_level):
parent_level = max(level for level in self._level_to_elem
if child_level > level)
return self._level_to_elem[parent_level]
def _prune_levels(self, limit_level):
self._level_to_elem = dict((level, elem)
for level, elem in self._level_to_elem.items()
if level <= limit_level)
def add_new_section(self, section, level):
parent = self._parent_elem(level)
parent.append(section)
self._level_to_elem[level] = section
self._prune_levels(level)
class CommonMarkParser(parsers.Parser):
"""Parser of recommonmark."""
supported = ('md', 'markdown')
def convert_blocks(self, blocks):
for block in blocks:
self.convert_block(block)
def convert_block(self, block):
if (block.t == "Document"):
self.convert_blocks(block.children)
elif (block.t == "ATXHeader") or (block.t == "SetextHeader"):
self.section(block)
elif (block.t == "Paragraph"):
self.paragraph(block)
elif (block.t == "BlockQuote"):
self.blockquote(block)
elif (block.t == "ListItem"):
self.list_item(block)
elif (block.t == "List"):
self.list_block(block)
elif (block.t == "IndentedCode"):
self.verbatim(block.string_content)
elif (block.t == "FencedCode"):
if len(block.strings) and len(block.strings[0]):
self.code(block.strings[0].strip(), block.string_content)
else:
self.verbatim(block.string_content)
elif (block.t == "ReferenceDef"):
self.reference(block)
elif (block.t == "HorizontalRule"):
self.horizontal_rule()
elif (block.t == "HtmlBlock"):
self.html_block(block)
else:
warn("Unsupported block type: " + block.t)
def parse(self, inputstring, document):
self.setup_parse(inputstring, document)
self.document = document
self.current_node = document
self.section_handler = _SectionHandler(document)
parser = DocParser()
ast = parser.parse(inputstring + '\n')
self.convert_block(ast)
self.finish_parse()
@contextmanager
def _temp_current_node(self, current_node):
saved_node = self.current_node
self.current_node = current_node
yield
self.current_node = saved_node
# Blocks
def section(self, block):
new_section = nodes.section()
new_section.line = block.start_line
new_section['level'] = block.level
title_node = nodes.title()
title_node.line = block.start_line
append_inlines(title_node, block.inline_content)
new_section.append(title_node)
name = nodes.fully_normalize_name(title_node.astext())
new_section['names'].append(name)
self.current_node.document.note_implicit_target(new_section, new_section)
new_section['ids'].append(nodes.make_id(name))
self.section_handler.add_new_section(new_section, block.level)
self.current_node = new_section
def verbatim(self, text):
verbatim_node = nodes.literal_block()
text = ''.join(flatten(text))
if text.endswith('\n'):
text = text[:-1]
verbatim_node.append(nodes.Text(text))
self.current_node.append(verbatim_node)
def code(self, language, text):
node = nodes.literal_block(text, text, language=language)
self.current_node.append(node)
def paragraph(self, block):
p = nodes.paragraph()
p.line = block.start_line
append_inlines(p, block.inline_content)
self.current_node.append(p)
def blockquote(self, block):
q = nodes.block_quote()
q.line = block.start_line
with self._temp_current_node(q):
self.convert_blocks(block.children)
self.current_node.append(q)
def list_item(self, block):
node = nodes.list_item()
node.line = block.start_line
with self._temp_current_node(node):
self.convert_blocks(block.children)
self.current_node.append(node)
def list_block(self, block):
list_node = None
if (block.list_data['type'] == "Bullet"):
list_node = nodes.bullet_list()
else:
list_node = nodes.enumerated_list()
list_node.line = block.start_line
with self._temp_current_node(list_node):
self.convert_blocks(block.children)
self.current_node.append(list_node)
def html_block(self, block):
raw_node = nodes.raw('', block.string_content, format='html')
raw_node.line = block.start_line
self.current_node.append(raw_node)
def horizontal_rule(self):
transition_node = nodes.transition()
self.current_node.append(transition_node)
def reference(self, block):
target_node = nodes.target()
target_node.line = block.start_line
target_node['names'].append(make_refname(block.label))
target_node['refuri'] = block.destination
if block.title:
target_node['title'] = block.title
self.current_node.append(target_node)
def make_refname(label):
return text_only(label).lower()
def text_only(nodes):
return "".join(s.c if s.t == "Str" else text_only(s.children)
for s in nodes)
# Inlines
def emph(inlines):
emph_node = nodes.emphasis()
append_inlines(emph_node, inlines)
return emph_node
def strong(inlines):
strong_node = nodes.strong()
append_inlines(strong_node, inlines)
return strong_node
def inline_code(inline):
literal_node = nodes.literal()
literal_node.append(nodes.Text(inline.c))
return literal_node
def inline_html(inline):
literal_node = nodes.raw('', inline.c, format='html')
return literal_node
def inline_entity(inline):
val = HTMLRenderer().renderInline(inline)
entity_node = nodes.paragraph('', val, format='html')
return entity_node
def reference(block):
ref_node = nodes.reference()
label = make_refname(block.label)
ref_node['name'] = label
if block.destination is not None:
ref_node['refuri'] = block.destination
else:
ref_node['refname'] = label
# self.document.note_refname(ref_node)
if block.title:
ref_node['title'] = block.title
append_inlines(ref_node, block.label)
return ref_node
def image(block):
img_node = nodes.image()
img_node['uri'] = block.destination
if block.title:
img_node['title'] = block.title
img_node['alt'] = text_only(block.label)
return img_node
def parse_inline(parent_node, inline):
node = None
if (inline.t == "Str"):
node = nodes.Text(inline.c)
elif (inline.t == "Softbreak"):
node = nodes.Text('\n')
elif inline.t == "Emph":
node = emph(inline.c)
elif inline.t == "Strong":
node = strong(inline.c)
elif inline.t == "Link":
node = reference(inline)
elif inline.t == "Image":
node = image(inline)
elif inline.t == "Code":
node = inline_code(inline)
elif inline.t == "Html":
node = inline_html(inline)
elif (inline.t == "Entity"):
node = inline_entity(inline)
else:
warn("Unsupported inline type " + inline.t)
return
node.line = inline.start_line
parent_node.append(node)
def append_inlines(parent_node, inlines):
for i in range(len(inlines)):
parse_inline(parent_node, inlines[i])
|