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"""The image collector for sphinx.environment."""
from __future__ import annotations
import os
from glob import glob
from os import path
from typing import TYPE_CHECKING, Any
from docutils import nodes
from docutils.utils import relative_path
from sphinx import addnodes
from sphinx.environment.collectors import EnvironmentCollector
from sphinx.locale import __
from sphinx.util import logging
from sphinx.util.i18n import get_image_filename_for_language, search_image_for_language
from sphinx.util.images import guess_mimetype
if TYPE_CHECKING:
from docutils.nodes import Node
from sphinx.application import Sphinx
from sphinx.environment import BuildEnvironment
logger = logging.getLogger(__name__)
class ImageCollector(EnvironmentCollector):
"""Image files collector for sphinx.environment."""
def clear_doc(self, app: Sphinx, env: BuildEnvironment, docname: str) -> None:
env.images.purge_doc(docname)
def merge_other(self, app: Sphinx, env: BuildEnvironment,
docnames: set[str], other: BuildEnvironment) -> None:
env.images.merge_other(docnames, other.images)
def process_doc(self, app: Sphinx, doctree: nodes.document) -> None:
"""Process and rewrite image URIs."""
docname = app.env.docname
for node in doctree.findall(nodes.image):
# Map the mimetype to the corresponding image. The writer may
# choose the best image from these candidates. The special key * is
# set if there is only single candidate to be used by a writer.
# The special key ? is set for nonlocal URIs.
candidates: dict[str, str] = {}
node['candidates'] = candidates
imguri = node['uri']
if imguri.startswith('data:'):
candidates['?'] = imguri
continue
if imguri.find('://') != -1:
candidates['?'] = imguri
continue
if imguri.endswith(os.extsep + '*'):
# Update `node['uri']` to a relative path from srcdir
# from a relative path from current document.
rel_imgpath, full_imgpath = app.env.relfn2path(imguri, docname)
node['uri'] = rel_imgpath
# Search language-specific figures at first
i18n_imguri = get_image_filename_for_language(imguri, app.env)
_, full_i18n_imgpath = app.env.relfn2path(i18n_imguri, docname)
self.collect_candidates(app.env, full_i18n_imgpath, candidates, node)
self.collect_candidates(app.env, full_imgpath, candidates, node)
else:
# substitute imguri by figure_language_filename
# (ex. foo.png -> foo.en.png)
imguri = search_image_for_language(imguri, app.env)
# Update `node['uri']` to a relative path from srcdir
# from a relative path from current document.
original_uri = node['uri']
node['uri'], _ = app.env.relfn2path(imguri, docname)
candidates['*'] = node['uri']
if node['uri'] != original_uri:
node['original_uri'] = original_uri
# map image paths to unique image names (so that they can be put
# into a single directory)
for imgpath in candidates.values():
app.env.dependencies[docname].add(imgpath)
if not os.access(path.join(app.srcdir, imgpath), os.R_OK):
logger.warning(__('image file not readable: %s') % imgpath,
location=node, type='image', subtype='not_readable')
continue
app.env.images.add_file(docname, imgpath)
def collect_candidates(self, env: BuildEnvironment, imgpath: str,
candidates: dict[str, str], node: Node) -> None:
globbed: dict[str, list[str]] = {}
for filename in glob(imgpath):
new_imgpath = relative_path(path.join(env.srcdir, 'dummy'),
filename)
try:
mimetype = guess_mimetype(filename)
if mimetype is None:
basename, suffix = path.splitext(filename)
mimetype = 'image/x-' + suffix[1:]
if mimetype not in candidates:
globbed.setdefault(mimetype, []).append(new_imgpath)
except OSError as err:
logger.warning(__('image file %s not readable: %s') % (filename, err),
location=node, type='image', subtype='not_readable')
for key, files in globbed.items():
candidates[key] = sorted(files, key=len)[0] # select by similarity
class DownloadFileCollector(EnvironmentCollector):
"""Download files collector for sphinx.environment."""
def clear_doc(self, app: Sphinx, env: BuildEnvironment, docname: str) -> None:
env.dlfiles.purge_doc(docname)
def merge_other(self, app: Sphinx, env: BuildEnvironment,
docnames: set[str], other: BuildEnvironment) -> None:
env.dlfiles.merge_other(docnames, other.dlfiles)
def process_doc(self, app: Sphinx, doctree: nodes.document) -> None:
"""Process downloadable file paths. """
for node in doctree.findall(addnodes.download_reference):
targetname = node['reftarget']
if '://' in targetname:
node['refuri'] = targetname
else:
rel_filename, filename = app.env.relfn2path(targetname, app.env.docname)
app.env.dependencies[app.env.docname].add(rel_filename)
if not os.access(filename, os.R_OK):
logger.warning(__('download file not readable: %s') % filename,
location=node, type='download', subtype='not_readable')
continue
node['filename'] = app.env.dlfiles.add_file(app.env.docname, rel_filename)
def setup(app: Sphinx) -> dict[str, Any]:
app.add_env_collector(ImageCollector)
app.add_env_collector(DownloadFileCollector)
return {
'version': 'builtin',
'parallel_read_safe': True,
'parallel_write_safe': True,
}
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