add preserve_exclamation_comments flag to compress more!

Author: wtayyeb

csscompressor/__init__.py

@@ -213,7 +213,7 @@ def _compress_hex_colors(css):
  return ''.join(buf)
 
 
-def _compress(css, max_linelen=0):
+def _compress(css, max_linelen=0, preserve_exclamation_comments=True):
  start_idx = end_idx = 0
  total_len = len(css)
 
@@ -272,7 +272,7 @@ def _replace(match):
 
  # ! in the first position of the comment means preserve
  # so push to the preserved tokens while stripping the !
- if token.startswith('!'):
+ if preserve_exclamation_comments and token.startswith('!'):
  preserved_tokens.append(token)
  css = css.replace(placeholder, '___YUICSSMIN_PRESERVED_TOKEN_{0}___'.
  format(len(preserved_tokens)-1))
@@ -447,7 +447,7 @@ def _apply_preserved(css, preserved_tokens):
  return css
 
 
-def compress(css, max_linelen=0):
+def compress(css, max_linelen=0, preserve_exclamation_comments=True):
  """Compress given CSS stylesheet.
 
  Parameters:
@@ -463,14 +463,15 @@ def compress(css, max_linelen=0):
  Returns a ``str`` object with compressed CSS.
  """
 
- css, preserved_tokens = _compress(css, max_linelen=max_linelen)
+ css, preserved_tokens = _compress(css, max_linelen=max_linelen, preserve_exclamation_comments=preserve_exclamation_comments)
  css = _apply_preserved(css, preserved_tokens)
  return css
 
 
 def compress_partitioned(css,
  max_linelen=0,
- max_rules_per_file=4000):
+ max_rules_per_file=4000,
+ preserve_exclamation_comments=True):
  """Compress given CSS stylesheet into a set of files.
 
  Parameters:
@@ -490,7 +491,7 @@ def compress_partitioned(css,
 
  assert max_rules_per_file > 0
 
- css, preserved_tokens = _compress(css, max_linelen=max_linelen)
+ css, preserved_tokens = _compress(css, max_linelen=max_linelen, preserve_exclamation_comments=preserve_exclamation_comments)
  css = css.strip()
 
  bufs = []