forked from getpelican/pelican
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rstdirectives.py
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rstdirectives.py
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# -*- coding: utf-8 -*-
from docutils import nodes
from docutils.parsers.rst import directives, Directive
from pygments.formatters import HtmlFormatter
from pygments import highlight
from pygments.lexers import get_lexer_by_name, TextLexer
INLINESTYLES = False
DEFAULT = HtmlFormatter(noclasses=INLINESTYLES)
VARIANTS = {
'linenos': HtmlFormatter(noclasses=INLINESTYLES, linenos=True),
}
class Pygments(Directive):
""" Source code syntax hightlighting.
"""
required_arguments = 1
optional_arguments = 0
final_argument_whitespace = True
option_spec = dict([(key, directives.flag) for key in VARIANTS])
has_content = True
def run(self):
self.assert_has_content()
try:
lexer = get_lexer_by_name(self.arguments[0])
except ValueError:
# no lexer found - use the text one instead of an exception
lexer = TextLexer()
# take an arbitrary option if more than one is given
formatter = self.options and VARIANTS[self.options.keys()[0]] \
or DEFAULT
parsed = highlight(u'\n'.join(self.content), lexer, formatter)
return [nodes.raw('', parsed, format='html')]
directives.register_directive('code-block', Pygments)