blob: d95e259c4bb36b17197a19e140d879823997fb4d [file] [log] [blame]
#!/usr/bin/env python
# Copyright 2014 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.
"""Scans the Chromium source of UseCounter, formats the Feature enum for
histograms.xml and merges it. This script can also generate a python code
snippet to put in uma.py of Chromium Dashboard. Make sure that you review the
output for correctness.
"""
import optparse
import os
import re
import sys
sys.path.append(os.path.join(os.path.dirname(__file__), '..', 'common'))
from update_histogram_enum import ReadHistogramValues
from update_histogram_enum import UpdateHistogramFromDict
from update_use_counter_feature_enum import PrintEnumForDashboard
USE_COUNTER_CPP_PATH = \
'../../../third_party/WebKit/Source/core/frame/UseCounter.cpp'
def EnumToCssProperty(enum_name):
"""Converts a camel cased enum name to the lower case CSS property."""
# The first group also searches for uppercase letters to account for single
# uppercase letters, such as in "ZIndex" that need to convert to "z-index".
return re.sub(r'([a-zA-Z])([A-Z])', r'\1-\2', enum_name).lower()
def ReadCssProperties(filename):
# Read the file as a list of lines
with open(filename) as f:
content = f.readlines()
# Looking for a line like "case CSSPropertyGrid: return 453;".
ENUM_REGEX = re.compile(r"""CSSProperty(.*): # capture the enum name
\s*return\s*
([0-9]+) # capture the id
""", re.VERBOSE)
properties = {}
for line in content:
enum_match = ENUM_REGEX.search(line)
if enum_match:
enum_name = enum_match.group(1)
property_id = int(enum_match.group(2))
properties[property_id] = EnumToCssProperty(enum_name)
return properties
if __name__ == '__main__':
parser = optparse.OptionParser()
parser.add_option('--for-dashboard', action='store_true', dest='dashboard',
default=False,
help='Print enum definition formatted for use in uma.py of '
'Chromium dashboard developed at '
'https://github.com/GoogleChrome/chromium-dashboard')
options, args = parser.parse_args()
if options.dashboard:
enum_dict = ReadCssProperties(USE_COUNTER_CPP_PATH)
PrintEnumForDashboard(enum_dict)
else:
UpdateHistogramFromDict(
'MappedCSSProperties', ReadCssProperties(USE_COUNTER_CPP_PATH),
USE_COUNTER_CPP_PATH)