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# -*- coding: utf-8 -*-
"""
sphinx.roles
~~~~~~~~~~~~
Handlers for additional ReST roles.
:copyright: 2007-2008 by Georg Brandl.
:license: BSD.
"""
import re
from docutils import nodes, utils
from docutils.parsers.rst import roles
from sphinx import addnodes
ws_re = re.compile(r'\s+')
caption_ref_re = re.compile(r'^([^<]+?)\s*<(.+)>$')
generic_docroles = {
'command' : nodes.strong,
'dfn' : nodes.emphasis,
'guilabel' : nodes.strong,
'kbd' : nodes.literal,
'mailheader' : addnodes.literal_emphasis,
'makevar' : nodes.Text,
'manpage' : addnodes.literal_emphasis,
'mimetype' : addnodes.literal_emphasis,
'newsgroup' : addnodes.literal_emphasis,
'program' : nodes.strong,
'regexp' : nodes.literal,
}
for rolename, nodeclass in generic_docroles.iteritems():
roles.register_generic_role(rolename, nodeclass)
def indexmarkup_role(typ, rawtext, etext, lineno, inliner, options={}, content=[]):
env = inliner.document.settings.env
text = utils.unescape(etext)
targetid = 'index-%s' % env.index_num
env.index_num += 1
indexnode = addnodes.index()
targetnode = nodes.target('', '', ids=[targetid])
inliner.document.note_explicit_target(targetnode)
if typ == 'envvar':
env.note_index_entry('single', text, targetid, text)
env.note_index_entry('single', 'environment variable; %s' % text,
targetid, text)
indexnode['entries'] = [('single', text, targetid, text),
('single', 'environment variable; %s' % text,
targetid, text)]
xref_nodes = xfileref_role(typ, rawtext, etext, lineno, inliner,
options, content)[0]
return [indexnode, targetnode] + xref_nodes, []
elif typ == 'pep':
env.note_index_entry('single', 'Python Enhancement Proposals!PEP %s' % text,
targetid, 'PEP %s' % text)
indexnode['entries'] = [('single', 'Python Enhancement Proposals!PEP %s' % text,
targetid, 'PEP %s' % text)]
try:
pepnum = int(text)
except ValueError:
msg = inliner.reporter.error('invalid PEP number %s' % text, line=lineno)
prb = inliner.problematic(rawtext, rawtext, msg)
return [prb], [msg]
ref = inliner.document.settings.pep_base_url + 'pep-%04d' % pepnum
sn = nodes.strong('PEP '+text, 'PEP '+text)
rn = nodes.reference('', '', refuri=ref)
rn += sn
return [indexnode, targetnode, rn], []
elif typ == 'rfc':
env.note_index_entry('single', 'RFC; RFC %s' % text,
targetid, 'RFC %s' % text)
indexnode['entries'] = [('single', 'RFC; RFC %s' % text,
targetid, 'RFC %s' % text)]
try:
rfcnum = int(text)
except ValueError:
msg = inliner.reporter.error('invalid RFC number %s' % text, line=lineno)
prb = inliner.problematic(rawtext, rawtext, msg)
return [prb], [msg]
ref = inliner.document.settings.rfc_base_url + inliner.rfc_url % rfcnum
sn = nodes.strong('RFC '+text, 'RFC '+text)
rn = nodes.reference('', '', refuri=ref)
rn += sn
return [indexnode, targetnode, rn], []
roles.register_canonical_role('envvar', indexmarkup_role)
roles.register_local_role('pep', indexmarkup_role)
roles.register_local_role('rfc', indexmarkup_role)
# default is `literal`
innernodetypes = {
'ref': nodes.emphasis,
'term': nodes.emphasis,
'token': nodes.strong,
'envvar': nodes.strong,
'option': addnodes.literal_emphasis,
}
def xfileref_role(typ, rawtext, text, lineno, inliner, options={}, content=[]):
env = inliner.document.settings.env
text = utils.unescape(text)
if typ in ('func', 'meth', 'cfunc'):
if text.endswith('()'):
# remove parentheses
text = text[:-2]
if env.config.add_function_parentheses:
# add them back to all occurrences if configured
text += '()'
# if the first character is a bang, don't cross-reference at all
if text[0:1] == '!':
text = text[1:]
return [innernodetypes.get(typ, nodes.literal)(
rawtext, text, classes=['xref'])], []
# we want a cross-reference, create the reference node
pnode = addnodes.pending_xref(rawtext, reftype=typ, refcaption=False,
modname=env.currmodule, classname=env.currclass)
# we may need the line number for warnings
pnode.line = lineno
innertext = text
# special actions for Python object cross-references
if typ in ('data', 'exc', 'func', 'class', 'const', 'attr', 'meth', 'mod'):
# if the first character is a dot, search more specific namespaces first
# else search builtins first
if text[0:1] == '.':
text = text[1:]
pnode['refspecific'] = True
# if the first character is a tilde, don't display the module/class parts
# of the contents
elif text[0:1] == '~':
text = text[1:]
dot = text.rfind('.')
if dot != -1:
innertext = text[dot+1:]
# look if explicit title and target are given
brace = text.find('<')
if brace != -1:
pnode['refcaption'] = True
m = caption_ref_re.match(text)
if m:
target = m.group(2)
innertext = m.group(1)
else:
# fallback: everything after '<' is the target
target = text[brace+1:]
innertext = text[:brace]
# else, generate target from title
else:
target = text
# some special cases
if typ == 'option' and text[0] in '-/':
# strip option marker from target
target = target[1:]
if typ == 'term':
# normalize whitespace in definition terms (if the term reference is
# broken over a line, a newline will be in text)
target = ws_re.sub(' ', target).lower()
else:
# remove all whitespace to avoid referencing problems
target = ws_re.sub('', target)
pnode['reftarget'] = target
pnode += innernodetypes.get(typ, nodes.literal)(rawtext, innertext, classes=['xref'])
return [pnode], []
def menusel_role(typ, rawtext, text, lineno, inliner, options={}, content=[]):
return [nodes.emphasis(
rawtext, utils.unescape(text).replace('-->', u'\N{TRIANGULAR BULLET}'))], []
_litvar_re = re.compile('{([^}]+)}')
def emph_literal_role(typ, rawtext, text, lineno, inliner, options={}, content=[]):
text = utils.unescape(text)
retnodes = []
pos = 0
for m in _litvar_re.finditer(text):
if m.start() > pos:
txt = text[pos:m.start()]
retnodes.append(nodes.literal(txt, txt))
retnodes.append(nodes.emphasis('', '', nodes.literal(m.group(1), m.group(1))))
pos = m.end()
if pos < len(text):
retnodes.append(nodes.literal(text[pos:], text[pos:]))
return retnodes, []
specific_docroles = {
'data': xfileref_role,
'exc': xfileref_role,
'func': xfileref_role,
'class': xfileref_role,
'const': xfileref_role,
'attr': xfileref_role,
'meth': xfileref_role,
'cfunc' : xfileref_role,
'cdata' : xfileref_role,
'ctype' : xfileref_role,
'cmacro' : xfileref_role,
'mod' : xfileref_role,
'keyword': xfileref_role,
'ref': xfileref_role,
'token' : xfileref_role,
'term': xfileref_role,
'option': xfileref_role,
'menuselection' : menusel_role,
'file' : emph_literal_role,
'samp' : emph_literal_role,
}
for rolename, func in specific_docroles.iteritems():
roles.register_canonical_role(rolename, func)
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