sphinx-lightbox
sphinx-lightbox is a Sphinx extension that turns standard .. image::
and .. figure:: directives into click-to-enlarge images in HTML output.
It uses a CSS checkbox-toggle mechanism, progressively enhanced with a small
JavaScript file for keyboard activation, focus management, Escape-to-close,
and optional gallery navigation.
Documentation is published at https://aputtu.github.io/sphinx-lightbox/.
Quick Start
pip install sphinx-lightbox
Enable the extension in conf.py:
extensions = ["lightbox"]
Opt a standard image into lightbox behavior:
.. image:: /images/example.png
:alt: Example image.
:class: lightbox
Figures are transformed by default and keep their normal page caption:
.. figure:: /images/example.png
:alt: Example figure.
This caption is also shown in the lightbox overlay.
Development
Create a local virtual environment and install development dependencies:
make setup
Common commands:
| Command | Description |
|---|---|
make test |
Run the pytest suite |
make lint |
Run ruff check and ruff format --check |
make type |
Run mypy |
make check |
Run lint, type checks, and tests |
make docs |
Build PDF docs, HTML docs, and validate generated HTML |
make standards |
Validate generated HTML, CSS, and SVG with the Nu checker |
make build |
Build distributions, run twine check, and validate archive contents |
make all |
Run check, docs, standards, build, and dependency audit |
The documentation build writes HTML to docs/_build/html/ and copies the PDF
download into docs/_downloads/sphinx-lightbox.pdf before rebuilding HTML, the
same pattern used by the GitHub Pages deployment workflow.
Project Layout
sphinx-lightbox/
|-- lightbox/ Extension package
| |-- lightbox.py
| |-- py.typed
| `-- static/
| |-- lightbox.css
| `-- lightbox.js
|-- docs/ Sphinx documentation source
| |-- _ext/ Docs-only validation fixes
| |-- _templates/ Accessible theme template overrides
| |-- _downloads/ Generated PDF download location
| `-- images/ Example images
|-- requirements/ Base, development, and docs requirements
|-- scripts/ Local development and validation helpers
|-- tests/ Unit and integration tests
|-- pyproject.toml
|-- tox.ini
`-- Makefile
Requirements
- Python 3.10 or later
- Sphinx 7.0 through 9.x
- LaTeX tooling such as
latexmkandtexlive-latex-extrafor PDF docs - Java 17 or later,
curl, andsha256sumfor the optional Nu standards gate
License
GPL-3.0-or-later.
1 maintainer
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