inspector/scripts/cssmin.py

   1 #!/usr/bin/python
   2
   3 # Copyright (C) 2013 Apple Inc. All rights reserved.
   4 #
   5 # Redistribution and use in source and binary forms, with or without
   6 # modification, are permitted provided that the following conditions
   7 # are met:
   8 # 1. Redistributions of source code must retain the above copyright
   9 #    notice, this list of conditions and the following disclaimer.
  10 # 2. Redistributions in binary form must reproduce the above copyright
  11 #    notice, this list of conditions and the following disclaimer in the
  12 #    documentation and/or other materials provided with the distribution.
  13 #
  14 # THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
  15 # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  16 # THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  17 # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
  18 # BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  19 # CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  20 # SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  21 # INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  22 # CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  23 # ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  24 # THE POSSIBILITY OF SUCH DAMAGE.
  25
  26 import re
  27
  28 def cssminify(css):
  29     rules = (
  30         (r"\/\*.*?\*\/", ""),          # delete comments
  31         (r"\n", ""),                   # delete new lines
  32         (r"\s+", " "),                 # change multiple spaces to one space
  33         (r"\s?([;:{},+>])\s?", r"\1"), # delete space where it is not needed
  34         (r";}", "}")                   # change ';}' to '}' because the semicolon is not needed
  35     )
  36
  37     css = css.replace("\r\n", "\n")
  38     for rule in rules:
  39         css = re.compile(rule[0], re.MULTILINE | re.UNICODE | re.DOTALL).sub(rule[1], css)
  40     return css
  41
  42 if __name__ == "__main__":
  43     import sys
  44     sys.stdout.write(cssminify(sys.stdin.read()))