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# -*- coding: utf-8 -*-
"""
sphinx.jinja2glue
~~~~~~~~~~~~~~~~~
Glue code for the jinja2 templating engine.
:copyright: Copyright 2007-2016 by the Sphinx team, see AUTHORS.
:license: BSD, see LICENSE for details.
"""
from os import path
from pprint import pformat
from six import string_types
from jinja2 import FileSystemLoader, BaseLoader, TemplateNotFound, \
contextfunction
from jinja2.utils import open_if_exists
from jinja2.sandbox import SandboxedEnvironment
from typing import Any, Callable, Iterator, Tuple # NOQA
from sphinx.application import TemplateBridge
from sphinx.util.osutil import mtimes_of_files
if False:
# For type annotation
from typing import Any, Callable, Iterator, Tuple # NOQA
from jinja2.environment import Environment # NOQA
from sphinx.builders import Builder # NOQA
from sphinx.themes import Theme # NOQA
def _tobool(val):
# type: (unicode) -> bool
if isinstance(val, string_types):
return val.lower() in ('true', '1', 'yes', 'on')
return bool(val)
def _toint(val):
# type: (unicode) -> int
try:
return int(val)
except ValueError:
return 0
def _slice_index(values, slices):
# type: (List, int) -> Iterator[List]
seq = list(values)
length = 0
for value in values:
length += 1 + len(value[1][1]) # count includes subitems
items_per_slice = length // slices
offset = 0
for slice_number in range(slices):
count = 0
start = offset
if slices == slice_number + 1: # last column
offset = len(seq)
else:
for value in values[offset:]:
count += 1 + len(value[1][1])
offset += 1
if count >= items_per_slice:
break
yield seq[start:offset]
def accesskey(context, key):
# type: (Any, unicode) -> unicode
"""Helper to output each access key only once."""
if '_accesskeys' not in context:
context.vars['_accesskeys'] = {}
if key and key not in context.vars['_accesskeys']:
context.vars['_accesskeys'][key] = 1
return 'accesskey="%s"' % key
return ''
class idgen(object):
def __init__(self):
# type: () -> None
self.id = 0
def current(self):
# type: () -> int
return self.id
def __next__(self):
# type: () -> int
self.id += 1
return self.id
next = __next__ # Python 2/Jinja compatibility
class SphinxFileSystemLoader(FileSystemLoader):
"""
FileSystemLoader subclass that is not so strict about '..' entries in
template names.
"""
def get_source(self, environment, template):
# type: (Environment, unicode) -> Tuple[unicode, unicode, Callable]
for searchpath in self.searchpath:
filename = path.join(searchpath, template)
f = open_if_exists(filename)
if f is None:
continue
with f:
contents = f.read().decode(self.encoding)
mtime = path.getmtime(filename)
def uptodate():
# type: () -> bool
try:
return path.getmtime(filename) == mtime
except OSError:
return False
return contents, filename, uptodate
raise TemplateNotFound(template)
class BuiltinTemplateLoader(TemplateBridge, BaseLoader):
"""
Interfaces the rendering environment of jinja2 for use in Sphinx.
"""
# TemplateBridge interface
def init(self, builder, theme=None, dirs=None):
# type: (Builder, Theme, List[unicode]) -> None
# create a chain of paths to search
if theme:
# the theme's own dir and its bases' dirs
pathchain = theme.get_dirchain()
# then the theme parent paths
loaderchain = pathchain + theme.themepath
elif dirs:
pathchain = list(dirs)
loaderchain = list(dirs)
else:
pathchain = []
loaderchain = []
# prepend explicit template paths
self.templatepathlen = len(builder.config.templates_path)
if builder.config.templates_path:
cfg_templates_path = [path.join(builder.confdir, tp)
for tp in builder.config.templates_path]
pathchain[0:0] = cfg_templates_path
loaderchain[0:0] = cfg_templates_path
# store it for use in newest_template_mtime
self.pathchain = pathchain
# make the paths into loaders
self.loaders = [SphinxFileSystemLoader(x) for x in loaderchain]
use_i18n = builder.app.translator is not None
extensions = use_i18n and ['jinja2.ext.i18n'] or []
self.environment = SandboxedEnvironment(loader=self,
extensions=extensions)
self.environment.filters['tobool'] = _tobool
self.environment.filters['toint'] = _toint
self.environment.filters['slice_index'] = _slice_index
self.environment.globals['debug'] = contextfunction(pformat)
self.environment.globals['accesskey'] = contextfunction(accesskey)
self.environment.globals['idgen'] = idgen
if use_i18n:
self.environment.install_gettext_translations(builder.app.translator) # type: ignore # NOQA
def render(self, template, context):
# type: (unicode, Dict) -> unicode
return self.environment.get_template(template).render(context)
def render_string(self, source, context):
# type: (unicode, Dict) -> unicode
return self.environment.from_string(source).render(context)
def newest_template_mtime(self):
# type: () -> float
return max(mtimes_of_files(self.pathchain, '.html'))
# Loader interface
def get_source(self, environment, template):
# type: (Environment, unicode) -> Tuple[unicode, unicode, Callable]
loaders = self.loaders
# exclamation mark starts search from theme
if template.startswith('!'):
loaders = loaders[self.templatepathlen:]
template = template[1:]
for loader in loaders:
try:
return loader.get_source(environment, template)
except TemplateNotFound:
pass
raise TemplateNotFound(template)
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