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58f7f2b441
Summary: Closes https://github.com/caffe2/caffe2/pull/226 Differential Revision: D4793550 Pulled By: JoelMarcey fbshipit-source-id: cc33e58186304fa8dcac2ee9115dcc271d785b1e
97 lines
3.0 KiB
Python
97 lines
3.0 KiB
Python
## @package parser
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# Module caffe2.python.docs.parser
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from __future__ import absolute_import
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from __future__ import division
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from __future__ import print_function
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from __future__ import unicode_literals
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import re
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class Parser(object):
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# List of tuples (regex_str, lambda(regex_match, formatter))
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# If a lambda returns True it will be called repeatedly with replacement
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# otherwise it will only be called on text that hasn't been parsed yet.
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regexes = [
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# Code blocks of various formats
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('````(.+?)````',
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lambda m, f: f.addCode(m.group(1))
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),
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('```(.+?)```',
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lambda m, f: f.addCode(m.group(1))
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),
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('((( {2})+)(\S.*)(\n\s*\n|\n))+',
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lambda m, f: f.addCode(m.group(0))
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),
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('([^\.])\n',
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lambda m, f: f.addRaw('{c} '.format(c=m.group(1))) or True
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),
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('`(.+?)`',
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lambda m, f: f.addCode(m.group(1), True)
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),
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# Make links clickable
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('http[s]?://(?:[a-zA-Z]|[0-9]|[$-_@.&+]'
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'|[!*\(\),]|(?:%[0-9a-fA-F][0-9a-fA-F]))+',
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lambda m, f: f.addLink(m.group(0), m.group(0))
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),
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('\*\*(.+?)\*\*',
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lambda m, f: f.addEmphasis(m.group(1), 2)
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),
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('\*(.+?)\*',
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lambda m, f: f.addEmphasis(m.group(1), 1)
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),
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]
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def __init__(self, text, formatter):
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self.text = text
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self.lines = []
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self.formatter = formatter
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def parseText(self):
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UNPARSED = 0
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PARSED = 1
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parsed_block = [(UNPARSED, self.text)]
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for regex, func in self.regexes:
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index = 0
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while index < len(parsed_block):
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label, text = parsed_block[index]
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# Already been parsed
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if (label == PARSED):
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index += 1
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continue
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match = re.search(regex, text)
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if match:
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parsed_block.pop(index)
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start = match.start(0)
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end = match.end(0)
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f = self.formatter.clone()
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merge = func(match, f)
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if merge:
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merged = text[:start] + f.dump() + text[end:]
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parsed_block.insert(index, (UNPARSED, merged))
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else:
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if text[:start]:
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parsed_block.insert(index,
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(UNPARSED, text[:start]))
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index += 1
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parsed_block.insert(index, (PARSED, f.dump()))
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index += 1
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if text[end:]:
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parsed_block.insert(index,
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(UNPARSED, text[end:]))
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else:
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index += 1
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self.lines += [i for _, i in parsed_block]
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self.text = ' '.join(self.lines)
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def parse(self):
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self.parseText()
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return self.text
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