new fieldset attribute on field, use to group fields by the default form renderer
"""rest publishing functions
contains some functions and setup of docutils for cubicweb. Provides the
following ReST directives:
* `eid`, create link to entity in the repository by their eid
* `card`, create link to card entity in the repository by their wikiid
(proposing to create it when the refered card doesn't exist yet)
* `winclude`, reference to a web documentation file (in wdoc/ directories)
* `sourcecode` (if pygments is installed), source code colorization
:organization: Logilab
:copyright: 2001-2009 LOGILAB S.A. (Paris, FRANCE), license is LGPL v2.
:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
:license: GNU Lesser General Public License, v2.1 - http://www.gnu.org/licenses
"""
__docformat__ = "restructuredtext en"
from cStringIO import StringIO
from itertools import chain
from logging import getLogger
from os.path import join
from docutils import statemachine, nodes, utils, io
from docutils.core import publish_string
from docutils.parsers.rst import Parser, states, directives
from docutils.parsers.rst.roles import register_canonical_role, set_classes
from logilab.mtconverter import ESC_UCAR_TABLE, ESC_CAR_TABLE, xml_escape
from cubicweb import UnknownEid
from cubicweb.ext.html4zope import Writer
# We provide our own parser as an attempt to get rid of
# state machine reinstanciation
import re
# compile states.Body patterns
for k, v in states.Body.patterns.items():
if isinstance(v, str):
states.Body.patterns[k] = re.compile(v)
# register ReStructured Text mimetype / extensions
import mimetypes
mimetypes.add_type('text/rest', '.rest')
mimetypes.add_type('text/rest', '.rst')
LOGGER = getLogger('cubicweb.rest')
def eid_reference_role(role, rawtext, text, lineno, inliner,
options={}, content=[]):
try:
try:
eid_num, rest = text.split(u':', 1)
except:
eid_num, rest = text, '#'+text
eid_num = int(eid_num)
if eid_num < 0:
raise ValueError
except ValueError:
msg = inliner.reporter.error(
'EID number must be a positive number; "%s" is invalid.'
% text, line=lineno)
prb = inliner.problematic(rawtext, rawtext, msg)
return [prb], [msg]
# Base URL mainly used by inliner.pep_reference; so this is correct:
context = inliner.document.settings.context
try:
refedentity = context.req.eid_rset(eid_num).get_entity(0, 0)
except UnknownEid:
ref = '#'
rest += u' ' + context.req._('(UNEXISTANT EID)')
else:
ref = refedentity.absolute_url()
set_classes(options)
return [nodes.reference(rawtext, utils.unescape(rest), refuri=ref,
**options)], []
register_canonical_role('eid', eid_reference_role)
def winclude_directive(name, arguments, options, content, lineno,
content_offset, block_text, state, state_machine):
"""Include a reST file as part of the content of this reST file.
same as standard include directive but using config.locate_doc_resource to
get actual file to include.
Most part of this implementation is copied from `include` directive defined
in `docutils.parsers.rst.directives.misc`
"""
context = state.document.settings.context
source = state_machine.input_lines.source(
lineno - state_machine.input_offset - 1)
#source_dir = os.path.dirname(os.path.abspath(source))
fid = arguments[0]
for lang in chain((context.req.lang, context.vreg.property_value('ui.language')),
context.config.available_languages()):
rid = '%s_%s.rst' % (fid, lang)
resourcedir = context.config.locate_doc_file(rid)
if resourcedir:
break
else:
severe = state_machine.reporter.severe(
'Problems with "%s" directive path:\nno resource matching %s.'
% (name, fid),
nodes.literal_block(block_text, block_text), line=lineno)
return [severe]
path = join(resourcedir, rid)
encoding = options.get('encoding', state.document.settings.input_encoding)
try:
state.document.settings.record_dependencies.add(path)
include_file = io.FileInput(
source_path=path, encoding=encoding,
error_handler=state.document.settings.input_encoding_error_handler,
handle_io_errors=None)
except IOError, error:
severe = state_machine.reporter.severe(
'Problems with "%s" directive path:\n%s: %s.'
% (name, error.__class__.__name__, error),
nodes.literal_block(block_text, block_text), line=lineno)
return [severe]
try:
include_text = include_file.read()
except UnicodeError, error:
severe = state_machine.reporter.severe(
'Problem with "%s" directive:\n%s: %s'
% (name, error.__class__.__name__, error),
nodes.literal_block(block_text, block_text), line=lineno)
return [severe]
if options.has_key('literal'):
literal_block = nodes.literal_block(include_text, include_text,
source=path)
literal_block.line = 1
return literal_block
else:
include_lines = statemachine.string2lines(include_text,
convert_whitespace=1)
state_machine.insert_input(include_lines, path)
return []
winclude_directive.arguments = (1, 0, 1)
winclude_directive.options = {'literal': directives.flag,
'encoding': directives.encoding}
directives.register_directive('winclude', winclude_directive)
try:
from pygments import highlight
from pygments.lexers import get_lexer_by_name, LEXERS
from pygments.formatters import HtmlFormatter
except ImportError:
pass
else:
_PYGMENTS_FORMATTER = HtmlFormatter()
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:
import traceback
traceback.print_exc()
print sorted(aliases for module_name, name, aliases, _, _ in LEXERS.itervalues())
# no lexer found
lexer = get_lexer_by_name('text')
parsed = highlight(u'\n'.join(content), lexer, _PYGMENTS_FORMATTER)
context = state.document.settings.context
context.req.add_css('pygments.css')
return [nodes.raw('', parsed, format='html')]
pygments_directive.arguments = (1, 0, 1)
pygments_directive.content = 1
directives.register_directive('sourcecode', pygments_directive)
class CubicWebReSTParser(Parser):
"""The (customized) reStructuredText parser."""
def __init__(self):
self.initial_state = 'Body'
self.state_classes = states.state_classes
self.inliner = states.Inliner()
self.statemachine = states.RSTStateMachine(
state_classes=self.state_classes,
initial_state=self.initial_state,
debug=0)
def parse(self, inputstring, document):
"""Parse `inputstring` and populate `document`, a document tree."""
self.setup_parse(inputstring, document)
inputlines = statemachine.string2lines(inputstring,
convert_whitespace=1)
self.statemachine.run(inputlines, document, inliner=self.inliner)
self.finish_parse()
def rest_publish(context, data):
"""publish a string formatted as ReStructured Text to HTML
:type context: a cubicweb application object
:type data: str
:param data: some ReST text
:rtype: unicode
:return:
the data formatted as HTML or the original data if an error occured
"""
req = context.req
if isinstance(data, unicode):
encoding = 'unicode'
# remove unprintable characters unauthorized in xml
data = data.translate(ESC_UCAR_TABLE)
else:
encoding = req.encoding
# remove unprintable characters unauthorized in xml
data = data.translate(ESC_CAR_TABLE)
settings = {'input_encoding': encoding, 'output_encoding': 'unicode',
'warning_stream': StringIO(), 'context': context,
# dunno what's the max, severe is 4, and we never want a crash
# (though try/except may be a better option...)
'halt_level': 10,
}
if context:
if hasattr(req, 'url'):
base_url = req.url()
elif hasattr(context, 'absolute_url'):
base_url = context.absolute_url()
else:
base_url = req.base_url()
else:
base_url = None
try:
return publish_string(writer=Writer(base_url=base_url),
parser=CubicWebReSTParser(), source=data,
settings_overrides=settings)
except Exception:
LOGGER.exception('error while publishing ReST text')
if not isinstance(data, unicode):
data = unicode(data, encoding, 'replace')
return xml_escape(req._('error while publishing ReST text')
+ '\n\n' + data)