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#!/usr/bin/env python
# Copyright 2015 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Embeds standalone JavaScript snippets in C++ code.
The script requires the devtools/front_end/toolbox/OverridesUI.js file from
WebKit that lists the preset network conditions to be passed in as the only
argument. The list of network conditions will be written to a C-style string to
be parsed with JSONReader.
"""
import optparse
import re
import subprocess
import sys
import cpp_source
UNLIMITED_THROUGHPUT = ('WebInspector.OverridesSupport'
'.NetworkThroughputUnlimitedValue')
def quotizeKeys(s, keys):
"""Returns the string s with each instance of each key wrapped in quotes.
Args:
s: a string containing keys that need to be wrapped in quotes.
keys: an iterable of keys to be wrapped in quotes in the string.
"""
for key in keys:
s = re.sub('%s: ' % key, '"%s": ' % key, s)
return s
def evaluateMultiplications(s):
"""Returns the string s with each bare multiplication evaluated.
Since the source is JavaScript, which includes bare arithmetic, and the
output must be JSON format, we must evaluate all expressions.
Args:
s: a string containing bare multiplications that need to be evaluated.
"""
def evaluateBinaryMultiplication(match):
return str(float(match.group(1)) * float(match.group(2)))
return re.sub('([0-9\.]+) \* ([0-9\.]+)', evaluateBinaryMultiplication, s)
def main():
parser = optparse.OptionParser()
parser.add_option(
'', '--directory', type='string', default='.',
help='Path to directory where the cc/h files should be created')
options, args = parser.parse_args()
networks = '['
file_name = args[0]
inside_list = False
with open(file_name, 'r', encoding='utf-8') as f:
for line in f:
if not inside_list:
if 'WebInspector.OverridesUI._networkConditionsPresets = [' in line:
inside_list = True
else:
if line.strip() == '];':
inside_list = False
continue
line = line.replace(UNLIMITED_THROUGHPUT, "-1")
networks += line.strip()
output_dir = 'chrome/test/chromedriver/chrome'
networks += ']'
networks = quotizeKeys(networks, ['id', 'title', 'throughput', 'latency'])
networks = evaluateMultiplications(networks)
cpp_source.WriteSource('network_list',
output_dir,
options.directory, {'kNetworks': networks})
clang_format = ['clang-format', '-i']
subprocess.Popen(clang_format + ['%s/network_list.cc' % output_dir])
subprocess.Popen(clang_format + ['%s/network_list.h' % output_dir])
if __name__ == '__main__':
sys.exit(main())
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