1 files changed, 105 insertions, 0 deletions
diff --git a/third_party/libwebrtc/tools/grit/minimize_css.py b/third_party/libwebrtc/tools/grit/minimize_css.py
new file mode 100644
index 0000000000..2c3b8aeb1e
--- /dev/null
+++ b/third_party/libwebrtc/tools/grit/minimize_css.py
@@ -0,0 +1,105 @@
+#!/usr/bin/env python
+# Copyright 2016 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import re
+import sys
+
+class CSSMinimizer(object):
+
+  INITIAL = 0
+  MAYBE_COMMENT_START = 1
+  INSIDE_COMMENT = 2
+  MAYBE_COMMENT_END = 3
+  INSIDE_SINGLE_QUOTE = 4
+  INSIDE_SINGLE_QUOTE_ESCAPE = 5
+  INSIDE_DOUBLE_QUOTE = 6
+  INSIDE_DOUBLE_QUOTE_ESCAPE = 7
+
+  def __init__(self):
+    self._output = ''
+    self._codeblock = ''
+
+  def flush_codeblock(self):
+    stripped = re.sub(r"\s+", ' ', self._codeblock)
+    stripped = re.sub(r";?\s*(?P<op>[{};])\s*", r'\g<op>', stripped)
+    self._output += stripped
+    self._codeblock = ''
+
+  def parse(self, content):
+    state = self.INITIAL
+    for char in content:
+      if state == self.INITIAL:
+        if char == '/':
+          state = self.MAYBE_COMMENT_START
+        elif char == "'":
+          self.flush_codeblock()
+          self._output += char
+          state = self.INSIDE_SINGLE_QUOTE
+        elif char == '"':
+          self.flush_codeblock()
+          self._output += char
+          state = self.INSIDE_DOUBLE_QUOTE
+        else:
+          self._codeblock += char
+      elif state == self.MAYBE_COMMENT_START:
+        if char == '*':
+          self.flush_codeblock()
+          state = self.INSIDE_COMMENT
+        else:
+          self._codeblock += '/' + char
+          state = self.INITIAL
+      elif state == self.INSIDE_COMMENT:
+        if char == '*':
+          state = self.MAYBE_COMMENT_END
+        else:
+          pass
+      elif state == self.MAYBE_COMMENT_END:
+        if char == '/':
+          state = self.INITIAL
+        else:
+          state = self.INSIDE_COMMENT
+      elif state == self.INSIDE_SINGLE_QUOTE:
+        if char == '\\':
+          self._output += char
+          state = self.INSIDE_SINGLE_QUOTE_ESCAPE
+        elif char == "'":
+          self._output += char
+          state = self.INITIAL
+        else:
+          self._output += char
+      elif state == self.INSIDE_SINGLE_QUOTE_ESCAPE:
+        self._output += char
+        state = self.INSIDE_SINGLE_QUOTE
+      elif state == self.INSIDE_DOUBLE_QUOTE:
+        if char == '\\':
+          self._output += char
+          state = self.INSIDE_DOUBLE_QUOTE_ESCAPE
+        elif char == '"':
+          self._output += char
+          state = self.INITIAL
+        else:
+          self._output += char
+      elif state == self.INSIDE_DOUBLE_QUOTE_ESCAPE:
+        self._output += char
+        state = self.INSIDE_DOUBLE_QUOTE
+
+    self.flush_codeblock()
+    self._output = self._output.strip()
+    return self._output
+
+  @classmethod
+  def minimize_css(cls, content):
+    minimizer = CSSMinimizer()
+    return minimizer.parse(content)
+
+def main():
+  result = ''
+  try:
+    result = CSSMinimizer.minimize_css(sys.stdin.read())
+  finally:
+    print(result)
+
+if __name__ == '__main__':
+  main()