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# SPDX-License-Identifier: GPL-2.0
#
# Copyright © 2023, Oracle and/or its affiliates.
# Author: Vegard Nossum <vegard.nossum@oracle.com>
#
# Add translation links to the top of the document.
#
import os
from docutils import nodes
from docutils.transforms import Transform
import sphinx
from sphinx import addnodes
from sphinx.errors import NoUri
all_languages = {
# English is always first
None: 'English',
# Keep the rest sorted alphabetically
'zh_CN': 'Chinese (Simplified)',
'zh_TW': 'Chinese (Traditional)',
'it_IT': 'Italian',
'ja_JP': 'Japanese',
'ko_KR': 'Korean',
'sp_SP': 'Spanish',
}
class LanguagesNode(nodes.Element):
pass
class TranslationsTransform(Transform):
default_priority = 900
def apply(self):
app = self.document.settings.env.app
docname = self.document.settings.env.docname
this_lang_code = None
components = docname.split(os.sep)
if components[0] == 'translations' and len(components) > 2:
this_lang_code = components[1]
# normalize docname to be the untranslated one
docname = os.path.join(*components[2:])
new_nodes = LanguagesNode()
new_nodes['current_language'] = all_languages[this_lang_code]
for lang_code, lang_name in all_languages.items():
if lang_code == this_lang_code:
continue
if lang_code is None:
target_name = docname
else:
target_name = os.path.join('translations', lang_code, docname)
pxref = addnodes.pending_xref('', refdomain='std',
reftype='doc', reftarget='/' + target_name, modname=None,
classname=None, refexplicit=True)
pxref += nodes.Text(lang_name)
new_nodes += pxref
self.document.insert(0, new_nodes)
def process_languages(app, doctree, docname):
for node in doctree.traverse(LanguagesNode):
if app.builder.format not in ['html']:
node.parent.remove(node)
continue
languages = []
# Iterate over the child nodes; any resolved links will have
# the type 'nodes.reference', while unresolved links will be
# type 'nodes.Text'.
languages = list(filter(lambda xref:
isinstance(xref, nodes.reference), node.children))
html_content = app.builder.templates.render('translations.html',
context={
'current_language': node['current_language'],
'languages': languages,
})
node.replace_self(nodes.raw('', html_content, format='html'))
def setup(app):
app.add_node(LanguagesNode)
app.add_transform(TranslationsTransform)
app.connect('doctree-resolved', process_languages)
return {
'parallel_read_safe': True,
'parallel_write_safe': True,
}
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