1 #!/usr/bin/env python 2 # Copyright (c) 2012 The Chromium Authors. All rights reserved. 3 # Use of this source code is governed by a BSD-style license that can be 4 # found in the LICENSE file. 5 6 """Generate a C++ header from ibus_input_methods.txt. 7 8 This program generates a C++ header file containing the information on 9 available input methods. It parses input_methods.txt, and then generates a 10 static array definition from the information extracted. The input and output 11 file names are specified on the command line. 12 13 Run it like: 14 gen_input_methods.py input_methods.txt input_methods.h 15 16 It will produce output that looks like: 17 18 // This file is automatically generated by gen_input_methods.py 19 #ifndef CHROME_BROWSER_CHROMEOS_INPUT_METHOD_INPUT_METHODS_H_ 20 #define CHROME_BROWSER_CHROMEOS_INPUT_METHOD_INPUT_METHODS_H_ 21 22 namespace chromeos { 23 namespace input_method { 24 25 struct InputMethodsInfo { 26 const char* input_method_id; 27 const char* language_code; 28 const char* xkb_keyboard_id; 29 }; 30 const InputMethodsInfo kInputMethods[] = { 31 {"mozc-chewing", "zh-TW", "us"}, 32 {"xkb:us::eng", "en-US", "us"}, 33 {"xkb:us:dvorak:eng", "en-US", "us(dvorak)"}, 34 {"xkb:be::fra", "fr", "be"}, 35 {"xkb:br::por", "pt-BR", "br"}, 36 }; 37 38 } // namespace input_method 39 } // namespace chromeos 40 41 #endif // CHROME_BROWSER_CHROMEOS_INPUT_METHOD_INPUT_METHODS_H_ 42 43 """ 44 45 import fileinput 46 import re 47 import sys 48 49 OUTPUT_HEADER = """// Automatically generated by gen_input_methods.py 50 #ifndef CHROME_BROWSER_CHROMEOS_INPUT_METHOD_INPUT_METHODS_H_ 51 #define CHROME_BROWSER_CHROMEOS_INPUT_METHOD_INPUT_METHODS_H_ 52 53 namespace chromeos { 54 namespace input_method { 55 56 struct InputMethodsInfo { 57 const char* input_method_id; 58 const char* language_code; 59 const char* xkb_layout_id; 60 }; 61 const InputMethodsInfo kInputMethods[] = { 62 """ 63 64 CPP_FORMAT = '#if %s\n' 65 ENGINE_FORMAT = (' {"%(input_method_id)s", "%(language_code)s", ' + 66 '"%(xkb_layout_id)s"},\n') 67 68 OUTPUT_FOOTER = """ 69 }; 70 71 } // namespace input_method 72 } // namespace chromeos 73 74 #endif // CHROME_BROWSER_CHROMEOS_INPUT_METHOD_INPUT_METHODS_H_ 75 """ 76 77 def CreateEngineHeader(engines): 78 """Create the header file from a list of engines. 79 80 Arguments: 81 engines: list of engine objects 82 Returns: 83 The text of a C++ header file containing the engine data. 84 """ 85 output = [] 86 output.append(OUTPUT_HEADER) 87 for engine in engines: 88 if engine.has_key('if'): 89 output.append(CPP_FORMAT % engine['if']) 90 output.append(ENGINE_FORMAT % engine) 91 if engine.has_key('if'): 92 output.append('#endif\n') 93 output.append(OUTPUT_FOOTER) 94 95 return "".join(output) 96 97 98 def main(argv): 99 if len(argv) != 3: 100 print 'Usage: gen_input_methods.py [whitelist] [output]' 101 sys.exit(1) 102 engines = [] 103 for line in fileinput.input(sys.argv[1]): 104 line = line.strip() 105 if not line or re.match(r'#', line): 106 continue 107 columns = line.split() 108 assert len(columns) == 3 or len(columns) == 4, "Invalid format: " + line 109 engine = {} 110 engine['input_method_id'] = columns[0] 111 engine['xkb_layout_id'] = columns[1] 112 engine['language_code'] = columns[2] 113 if len(columns) == 4: 114 engine['if'] = columns[3] 115 engines.append(engine) 116 117 output = CreateEngineHeader(engines) 118 output_file = open(sys.argv[2], 'w') 119 output_file.write(output) 120 121 122 if __name__ == '__main__': 123 main(sys.argv) 124
