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chore: import upstream snapshot with attribution
2026-07-13 13:39:52 +08:00

140 lines
4.8 KiB
Python

"""A directive to generate a gallery of images from structured data.
Generating a gallery of images that are all the same size is a common
pattern in documentation, and this can be cumbersome if the gallery is
generated programmatically. This directive wraps this particular use-case
in a helper-directive to generate it with a single YAML configuration file.
It currently exists for maintainers of the pydata-sphinx-theme,
but might be abstracted into a standalone package if it proves useful.
"""
from yaml import safe_load
from typing import List
from pathlib import Path
from docutils import nodes
from docutils.parsers.rst import directives
from sphinx.util.docutils import SphinxDirective
from sphinx.util import logging
logger = logging.getLogger(__name__)
TEMPLATE_GRID = """
`````{{grid}} {grid_columns}
{container_options}
{content}
`````
"""
GRID_CARD = """
````{{grid-item-card}} {title}
{card_options}
{content}
````
"""
class GalleryDirective(SphinxDirective):
"""A directive to show a gallery of images and links in a grid."""
name = "gallery-grid"
has_content = True
required_arguments = 0
optional_arguments = 1
final_argument_whitespace = True
option_spec = {
# A class to be added to the resulting container
"grid-columns": directives.unchanged,
"class-container": directives.unchanged,
"class-card": directives.unchanged,
}
def run(self) -> List[nodes.Node]: # noqa: C901
if self.arguments:
# If an argument is given, assume it's a path to a YAML file
# Parse it and load it into the directive content
path_data_rel = Path(self.arguments[0])
path_doc, _ = self.get_source_info()
path_doc = Path(path_doc).parent
path_data = (path_doc / path_data_rel).resolve()
if not path_data.exists():
logger.warn(f"Could not find grid data at {path_data}.")
nodes.text("No grid data found at {path_data}.")
return
yaml_string = path_data.read_text()
else:
yaml_string = "\n".join(self.content)
# Read in YAML so we can generate the gallery
grid_data = safe_load(yaml_string)
grid_items = []
for item in grid_data:
# Grid card parameters
options = {}
if "website" in item:
options["link"] = item["website"]
if "class-card" in self.options:
options["class-card"] = self.options["class-card"]
if "img-background" in item:
options["img-background"] = item["img-background"]
if "img-top" in item:
options["img-top"] = item["img-top"]
if "img-bottom" in item:
options["img-bottom"] = item["img-bottom"]
options_str = "\n".join(f":{k}: {v}" for k, v in options.items()) + "\n\n"
# Grid card content
content_str = ""
if "header" in item:
content_str += f"{item['header']}\n\n^^^\n\n"
if "image" in item:
content_str += f"![Gallery image]({item['image']})\n\n"
if "content" in item:
content_str += f"{item['content']}\n\n"
if "footer" in item:
content_str += f"+++\n\n{item['footer']}\n\n"
title = item.get("title", "")
content_str += "\n"
grid_items.append(
GRID_CARD.format(
card_options=options_str, content=content_str, title=title
)
)
# Parse the template with Sphinx Design to create an output
container = nodes.container()
# Prep the options for the template grid
container_options = {"gutter": 2, "class-container": "gallery-directive"}
if "class-container" in self.options:
container_options[
"class-container"
] += f' {self.options["class-container"]}'
container_options_str = "\n".join(
f":{k}: {v}" for k, v in container_options.items()
)
# Create the directive string for the grid
grid_directive = TEMPLATE_GRID.format(
grid_columns=self.options.get("grid-columns", "1 2 3 4"),
container_options=container_options_str,
content="\n".join(grid_items),
)
# Parse content as a directive so Sphinx Design processes it
self.state.nested_parse([grid_directive], 0, container)
# Sphinx Design outputs a container too, so just use that
container = container.children[0]
# Add extra classes
if self.options.get("container-class", []):
container.attributes["classes"] += self.options.get("class", [])
return [container]