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# -*- coding: utf-8 -*-
"""
sphinx.ext.extlinks
~~~~~~~~~~~~~~~~~~~
Extension to save typing and prevent hard-coding of base URLs in the reST
files.
This adds a new config value called ``extlinks`` that is created like this::
extlinks = {'exmpl': ('http://example.com/%s.html', prefix), ...}
Now you can use e.g. :exmpl:`foo` in your documents. This will create a
link to ``http://example.com/foo.html``. The link caption depends on the
*prefix* value given:
- If it is ``None``, the caption will be the full URL.
- If it is a string (empty or not), the caption will be the prefix prepended
to the role content.
You can also give an explicit caption, e.g. :exmpl:`Foo <foo>`.
:copyright: Copyright 2007-2014 by the Sphinx team, see AUTHORS.
:license: BSD, see LICENSE for details.
"""
from docutils import nodes, utils
from sphinx.util.nodes import split_explicit_title
def make_link_role(base_url, prefix):
def role(typ, rawtext, text, lineno, inliner, options={}, content=[]):
text = utils.unescape(text)
has_explicit_title, title, part = split_explicit_title(text)
try:
full_url = base_url % part
except (TypeError, ValueError):
inliner.reporter.warning(
'unable to expand %s extlink with base URL %r, please make '
'sure the base contains \'%%s\' exactly once'
% (typ, base_url), line=lineno)
full_url = base_url + part
if not has_explicit_title:
if prefix is None:
title = full_url
else:
title = prefix + part
pnode = nodes.reference(title, title, internal=False, refuri=full_url)
return [pnode], []
return role
def setup_link_roles(app):
for name, (base_url, prefix) in app.config.extlinks.iteritems():
app.add_role(name, make_link_role(base_url, prefix))
def setup(app):
app.add_config_value('extlinks', {}, 'env')
app.connect('builder-inited', setup_link_roles)
|
