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#!/usr/bin/env python
# Copyright (c) 2012 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.
"""Generate a C++ header from input_methods.txt.
This program generates a C++ header file containing the information on
available input methods. It parses input_methods.txt, and then generates a
static array definition from the information extracted. The input and output
file names are specified on the command line.
The header input_methods.h is used in input_method_whitelist.cc which is for
testing purpose.
Run it like:
gen_input_methods.py input_methods.txt input_methods.h
It will produce output that looks like:
// This file is automatically generated by gen_input_methods.py
#ifndef CHROMEOS_IME_INPUT_METHODS_H_
#define CHROMEOS_IME_INPUT_METHODS_H_
namespace chromeos {
namespace input_method {
struct InputMethodsInfo {
const char* input_method_id;
const char* language_code;
const char* xkb_keyboard_id;
const char* indicator;
bool is_login_keyboard;
};
const InputMethodsInfo kInputMethods[] = {
{"xkb:us::eng", "en-US", "us", "US", true},
{"xkb:us:dvorak:eng", "en-US", "us(dvorak)", "DV", true},
{"xkb:be::fra", "fr", "be", "BE", true},
{"xkb:br::por", "pt-BR", "br", "BR", true},
{"xkb:ru::rus", "ru", "ru", "RU", false},
};
} // namespace input_method
} // namespace chromeos
#endif // CHROMEOS_IME_INPUT_METHODS_H_
"""
import fileinput
import re
import sys
OUTPUT_HEADER = """// Automatically generated by gen_input_methods.py
#ifndef CHROMEOS_IME_INPUT_METHODS_H_
#define CHROMEOS_IME_INPUT_METHODS_H_
namespace chromeos {
namespace input_method {
struct InputMethodsInfo {
const char* input_method_id;
const char* language_code;
const char* xkb_layout_id;
const char* indicator;
bool is_login_keyboard;
};
const InputMethodsInfo kInputMethods[] = {
"""
CPP_FORMAT = '#if %s\n'
ENGINE_FORMAT = (' {"%(input_method_id)s", "%(language_code)s", ' +
'"%(xkb_layout_id)s", "%(indicator)s", ' +
'%(is_login_keyboard)s},\n')
OUTPUT_FOOTER = """
};
} // namespace input_method
} // namespace chromeos
#endif // CHROMEOS_IME_INPUT_METHODS_H_
"""
def CreateEngineHeader(engines):
"""Create the header file from a list of engines.
Arguments:
engines: list of engine objects
Returns:
The text of a C++ header file containing the engine data.
"""
output = []
output.append(OUTPUT_HEADER)
for engine in engines:
if engine.has_key('if'):
output.append(CPP_FORMAT % engine['if'])
output.append(ENGINE_FORMAT % engine)
if engine.has_key('if'):
output.append('#endif\n')
output.append(OUTPUT_FOOTER)
return "".join(output)
def main(argv):
if len(argv) != 3:
print 'Usage: gen_input_methods.py [whitelist] [output]'
sys.exit(1)
engines = []
for line in fileinput.input(sys.argv[1]):
line = line.strip()
if not line or re.match(r'#', line):
continue
columns = line.split()
assert len(columns) == 4 or len(columns) == 5, "Invalid format: " + line
engine = {}
engine['input_method_id'] = columns[0]
engine['xkb_layout_id'] = columns[1]
engine['language_code'] = columns[2]
engine['indicator'] = columns[3]
is_login_keyboard = "false"
if len(columns) == 5:
assert columns[4] == "login", "Invalid attribute: " + columns[4]
is_login_keyboard = "true"
engine['is_login_keyboard'] = is_login_keyboard
engines.append(engine)
output = CreateEngineHeader(engines)
output_file = open(sys.argv[2], 'w')
output_file.write(output)
if __name__ == '__main__':
main(sys.argv)
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