52 lines
1.7 KiB
Python
52 lines
1.7 KiB
Python
import re
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def cssmin(path):
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with open(path, "r") as f:
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css = f.read()
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# remove comments - this will break a lot of hacks :-P
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css = re.sub(r"\s*/\*\s*\*/", "$$HACK1$$", css) # preserve IE<6 comment hack
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css = re.sub(r"/\*[\s\S]*?\*/", "", css)
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css = css.replace("$$HACK1$$", "/**/") # preserve IE<6 comment hack
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# url() doesn't need quotes
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css = re.sub(r'url\((["\'])([^)]*)\1\)', r"url(\2)", css)
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# spaces may be safely collapsed as generated content will collapse them anyway
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css = re.sub(r"\s+", " ", css)
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# shorten collapsable colors: #aabbcc to #abc
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css = re.sub(r"#([0-9a-f])\1([0-9a-f])\2([0-9a-f])\3(\s|;)", r"#\1\2\3\4", css)
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# fragment values can loose zeros
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css = re.sub(r":\s*0(\.\d+([cm]m|e[mx]|in|p[ctx]))\s*;", r":\1;", css)
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return_string = ""
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for rule in re.findall(r"([^{]+){([^}]*)}", css):
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# we don't need spaces around operators
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selectors = [
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re.sub(r"(?<=[\[\(>+=])\s+|\s+(?=[=~^$*|>+\]\)])", r"", selector.strip())
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for selector in rule[0].split(",")
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]
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# order is important, but we still want to discard repetitions
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properties = {}
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porder = []
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for prop in re.findall("(.*?):(.*?)(;|$)", rule[1]):
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key = prop[0].strip().lower()
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if key not in porder:
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porder.append(key)
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properties[key] = prop[1].strip()
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# output rule if it contains any declarations
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if properties:
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return_string += "%s{%s}" % (
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",".join(selectors),
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"".join(["%s:%s;" % (key, properties[key]) for key in porder])[:-1],
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)
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return return_string
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