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# This file is part of python-markups module
# License: 3-clause BSD, see LICENSE file
# Copyright: (C) Dmitry Shachnev, 2012-2025
import os.path
# Some common constants and functions
(LANGUAGE_HOME_PAGE, MODULE_HOME_PAGE, SYNTAX_DOCUMENTATION) = range(3)
CONFIGURATION_DIR = (
os.getenv("XDG_CONFIG_HOME")
or os.getenv("APPDATA")
or os.path.expanduser("~/.config")
)
MATHJAX2_LOCAL_FILES = (
"/usr/share/javascript/mathjax/MathJax.js", # Debian libjs-mathjax
"/usr/share/mathjax2/MathJax.js", # Arch Linux mathjax2
)
MATHJAX3_LOCAL_FILES = (
"/usr/share/nodejs/mathjax-full/es5/tex-chtml.js", # Debian node-mathjax-full
"/usr/share/mathjax/tex-chtml.js", # Arch Linux mathjax
)
MATHJAX_WEB_URL = "https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-chtml.js"
PYGMENTS_STYLE = "default"
def get_pygments_stylesheet(selector: str | None, style: str | None = None) -> str:
if style is None:
style = PYGMENTS_STYLE
if style == "":
return ""
try:
from pygments.formatters import HtmlFormatter
except ImportError:
return ""
else:
defs = HtmlFormatter(style=style).get_style_defs(selector)
assert isinstance(defs, str)
return defs + "\n"
def get_mathjax_url_and_version(webenv: bool) -> tuple[str, int]:
if not webenv:
for path in MATHJAX3_LOCAL_FILES:
if os.path.exists(path):
return f"file://{path}", 3
for path in MATHJAX2_LOCAL_FILES:
if os.path.exists(path):
return f"file://{path}", 2
return MATHJAX_WEB_URL, 3
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