2024-08-20 14:41:43 +02:00

144 lines
3.8 KiB
Python

"""
Models for the custom_css app
"""
import os
import re
# Django Solo
from solo.models import SingletonModel
# Django
from django.conf import settings
from django.db import models
from django.utils.translation import gettext_lazy as _
class CustomCSS(SingletonModel):
"""
Model for storing custom CSS for the site
"""
css = models.TextField(
blank=True,
null=True,
verbose_name=_("Your custom CSS"),
help_text=_("This CSS will be added to the site after the default CSS."),
)
timestamp = models.DateTimeField(auto_now=True)
class Meta:
"""
Meta for CustomCSS
"""
default_permissions = ()
verbose_name = _("Custom CSS")
verbose_name_plural = _("Custom CSS")
def __str__(self) -> str:
"""
String representation of CustomCSS
:return:
:rtype:
"""
return str(_("Custom CSS"))
def save(self, *args, **kwargs):
"""
Save method for CustomCSS
:param args:
:type args:
:param kwargs:
:type kwargs:
:return:
:rtype:
"""
self.pk = 1
if self.css and len(self.css.replace(" ", "")) > 0:
# Write the custom CSS to a file
custom_css_file = open(
f"{settings.STATIC_ROOT}allianceauth/custom-styles.css", "w+"
)
custom_css_file.write(self.compress_css())
custom_css_file.close()
else:
# Remove the custom CSS file
try:
os.remove(f"{settings.STATIC_ROOT}allianceauth/custom-styles.css")
except FileNotFoundError:
pass
super().save(*args, **kwargs)
def compress_css(self) -> str:
"""
Compress CSS
:return:
:rtype:
"""
css = self.css
new_css = ""
# Remove comments
css = re.sub(pattern=r"\s*/\*\s*\*/", repl="$$HACK1$$", string=css)
css = re.sub(pattern=r"/\*[\s\S]*?\*/", repl="", string=css)
css = css.replace("$$HACK1$$", "/**/")
# url() doesn't need quotes
css = re.sub(pattern=r'url\((["\'])([^)]*)\1\)', repl=r"url(\2)", string=css)
# Spaces may be safely collapsed as generated content will collapse them anyway.
css = re.sub(pattern=r"\s+", repl=" ", string=css)
# Shorten collapsable colors: #aabbcc to #abc
css = re.sub(
pattern=r"#([0-9a-f])\1([0-9a-f])\2([0-9a-f])\3(\s|;)",
repl=r"#\1\2\3\4",
string=css,
)
# Fragment values can loose zeros
css = re.sub(
pattern=r":\s*0(\.\d+([cm]m|e[mx]|in|p[ctx]))\s*;", repl=r":\1;", string=css
)
for rule in re.findall(pattern=r"([^{]+){([^}]*)}", string=css):
# We don't need spaces around operators
selectors = [
re.sub(
pattern=r"(?<=[\[\(>+=])\s+|\s+(?=[=~^$*|>+\]\)])",
repl=r"",
string=selector.strip(),
)
for selector in rule[0].split(",")
]
# Order is important, but we still want to discard repetitions
properties = {}
porder = []
for prop in re.findall(pattern="(.*?):(.*?)(;|$)", string=rule[1]):
key = prop[0].strip().lower()
if key not in porder:
porder.append(key)
properties[key] = prop[1].strip()
# output rule if it contains any declarations
if properties:
new_css += "{}{{{}}}".format(
",".join(selectors),
"".join([f"{key}:{properties[key]};" for key in porder])[:-1],
)
return new_css