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from functools import partial
from django.utils.html import escape, linebreaks, urlize
from django.utils.translation import pgettext_lazy as _
from django.conf import settings
# build DEFAULT_MARKUP_TYPES
DEFAULT_MARKUP_TYPES = [
("html", lambda markup: markup, _("django-markupfield", "HTML")),
(
"plain",
lambda markup: linebreaks(urlize(escape(markup))),
_("django-markupfield", "Plain"),
),
]
try:
import pygments # noqa
PYGMENTS_INSTALLED = True
def _register_pygments_rst_directive():
from docutils import nodes
from docutils.parsers.rst import directives
from pygments import highlight
from pygments.lexers import get_lexer_by_name, TextLexer
from pygments.formatters import HtmlFormatter
DEFAULT = HtmlFormatter()
VARIANTS = {
"linenos": HtmlFormatter(linenos=True),
}
def pygments_directive(
name,
arguments,
options,
content,
lineno,
content_offset,
block_text,
state,
state_machine,
):
try:
lexer = get_lexer_by_name(arguments[0])
except ValueError:
# no lexer found - use the text one instead of an exception
lexer = TextLexer()
formatter = options and VARIANTS[options.keys()[0]] or DEFAULT
parsed = highlight(u"\n".join(content), lexer, formatter)
return [nodes.raw("", parsed, format="html")]
pygments_directive.arguments = (1, 0, 1)
pygments_directive.content = 1
directives.register_directive("code", pygments_directive)
except ImportError:
PYGMENTS_INSTALLED = False
try:
import markdown
md_filter = markdown.markdown
# try and replace if pygments & codehilite are available
if PYGMENTS_INSTALLED:
try:
from markdown.extensions.codehilite import makeExtension # noqa
md_filter = partial(
markdown.markdown, extensions=[makeExtension(css_class="highlight")]
)
except ImportError:
pass
# whichever markdown_filter was available
DEFAULT_MARKUP_TYPES.append(
("markdown", md_filter, _("django-markupfield", "Markdown"))
)
except ImportError:
pass
try:
from docutils.core import publish_parts
if PYGMENTS_INSTALLED:
_register_pygments_rst_directive()
def render_rest(markup):
overrides = getattr(settings, "RESTRUCTUREDTEXT_FILTER_SETTINGS", {})
overrides.update({"raw_enabled": False, "file_insertion_enabled": False})
parts = publish_parts(
source=markup, writer_name="html4css1", settings_overrides=overrides
)
return parts["fragment"]
DEFAULT_MARKUP_TYPES.append(
("restructuredtext", render_rest, _("django-markupfield", "Restructured Text"))
)
except ImportError:
pass
|
