File scripts/cleanhtml.py from the latest check-in

import sys
import re

def cleancss(text):
    text=re.compile('\s+').sub(' ', text)
    text=re.compile('\s*(?P<a>,|:)\s*').sub('\g<a> ', text)
    text=re.compile('\s*;\s*').sub(';\n    ', text)
    text=re.compile('\s*\{\s*').sub(' {\n    ', text)
    text=re.compile('\s*\}\s*').sub('\n}\n\n', text)
    return text

def cleanhtml(text):
    text=text.lower()
    r=re.compile('\<script.+?/script\>', re.DOTALL)
    scripts=r.findall(text)
    text=r.sub('<script />', text)
    r=re.compile('\<style.+?/style\>', re.DOTALL)
    styles=r.findall(text)
    text=r.sub('<style />', text)
    text=re.compile(
        '<(?P<tag>(input|meta|link|hr|br|img|param))(?P<any>[^\>]*)\s*(?<!/)>')\
        .sub('<\g<tag>\g<any> />', text)
    text=text.replace('\n', ' ')
    text=text.replace('>', '>\n')
    text=text.replace('<', '\n<')
    text=re.compile('\s*\n\s*').sub('\n', text)
    lines=text.split('\n')
    (indent, newlines)=(0, [])
    for line in lines:
        if line[:2]=='</': indent=indent-1
        newlines.append(indent*'  '+line)
        if not line[:2]=='</' and line[-1:]=='>' and \
                not line[-2:] in ['/>', '->']: indent=indent+1
    text='\n'.join(newlines)
    text=re.compile('\<div(?P<a>( .+)?)\>\s+\</div\>').sub('<div\g<a>></div>',text)
    text=re.compile('\<a(?P<a>( .+)?)\>\s+(?P<b>[\w\s\(\)\/]+?)\s+\</a\>').sub('<a\g<a>>\g<b></a>',text)
    text=re.compile('\<b(?P<a>( .+)?)\>\s+(?P<b>[\w\s\(\)\/]+?)\s+\</b\>').sub('<b\g<a>>\g<b></b>',text)
    text=re.compile('\<i(?P<a>( .+)?)\>\s+(?P<b>[\w\s\(\)\/]+?)\s+\</i\>').sub('<i\g<a>>\g<b></i>',text)
    text=re.compile('\<span(?P<a>( .+)?)\>\s+(?P<b>[\w\s\(\)\/]+?)\s+\</span\>').sub('<span\g<a>>\g<b></span>',text)
    text=re.compile('\s+\<br(?P<a>.*?)\/\>').sub('<br\g<a>/>',text)
    text=re.compile('\>(?P<a>\s+)(?P<b>[\.\,\:\;])').sub('>\g<b>\g<a>',text)
    text=re.compile('\n\s*\n').sub('\n',text)
    for script in scripts:
        text=text.replace('<script />', script, 1)
    for style in styles:
        text=text.replace('<style />', cleancss(style), 1)
    return text

def read_file(filename):
    f = open(filename, 'r')
    try:
        return f.read()
    finally:
        f.close()

file=sys.argv[1]
if file[-4:]=='.css':
    print cleancss(read_file(file))
if file[-5:]=='.html':
    print cleanhtml(read_file(file))