| #!/usr/bin/python3 |
| # -*- coding: utf-8 -*- |
| # |
| # Generate a translit_fraction file from a UnicodeData file. |
| # Copyright (C) 2015-2018 Free Software Foundation, Inc. |
| # This file is part of the GNU C Library. |
| # |
| # The GNU C Library is free software; you can redistribute it and/or |
| # modify it under the terms of the GNU Lesser General Public |
| # License as published by the Free Software Foundation; either |
| # version 2.1 of the License, or (at your option) any later version. |
| # |
| # The GNU C Library is distributed in the hope that it will be useful, |
| # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| # Lesser General Public License for more details. |
| # |
| # You should have received a copy of the GNU Lesser General Public |
| # License along with the GNU C Library; if not, see |
| # <http://www.gnu.org/licenses/>. |
| |
| ''' |
| Generate a translit_fraction file from UnicodeData.txt |
| |
| To see how this script is used, call it with the “-h” option: |
| |
| $ ./gen_translit_fraction -h |
| … prints usage message … |
| ''' |
| |
| import argparse |
| import time |
| import unicode_utils |
| |
| def read_input_file(filename): |
| '''Reads the original glibc translit_fraction file to get the |
| original head and tail. |
| |
| We want to replace only the part of the file between |
| “translit_start” and “translit_end” |
| ''' |
| head = tail = '' |
| with open(filename, mode='r') as translit_file: |
| for line in translit_file: |
| head = head + line |
| if line.startswith('translit_start'): |
| break |
| for line in translit_file: |
| if line.startswith('translit_end'): |
| tail = line |
| break |
| for line in translit_file: |
| tail = tail + line |
| return (head, tail) |
| |
| def output_head(translit_file, unicode_version, head=''): |
| '''Write the header of the output file, i.e. the part of the file |
| before the “translit_start” line. |
| ''' |
| if ARGS.input_file and head: |
| translit_file.write(head) |
| else: |
| translit_file.write('escape_char /\n') |
| translit_file.write('comment_char %\n') |
| translit_file.write(unicode_utils.COMMENT_HEADER) |
| translit_file.write('\n') |
| translit_file.write('% Transliterations of fractions.\n') |
| translit_file.write('% Generated automatically from UnicodeData.txt ' |
| + 'by gen_translit_fraction.py ' |
| + 'on {:s} '.format(time.strftime('%Y-%m-%d')) |
| + 'for Unicode {:s}.\n'.format(unicode_version)) |
| translit_file.write('% The replacements have been surrounded ') |
| translit_file.write('with spaces, because fractions are\n') |
| translit_file.write('% often preceded by a decimal number and ') |
| translit_file.write('followed by a unit or a math symbol.\n') |
| translit_file.write('\n') |
| translit_file.write('LC_CTYPE\n') |
| translit_file.write('\n') |
| translit_file.write('translit_start\n') |
| |
| def output_tail(translit_file, tail=''): |
| '''Write the tail of the output file''' |
| if ARGS.input_file and tail: |
| translit_file.write(tail) |
| else: |
| translit_file.write('translit_end\n') |
| translit_file.write('\n') |
| translit_file.write('END LC_CTYPE\n') |
| |
| def special_decompose(code_point_list): |
| ''' |
| Decompositions which are not in UnicodeData.txt at all but which |
| were used in the original translit_fraction file in glibc and |
| which seem to make sense. I want to keep the update of |
| translit_fraction close to the spirit of the original file, |
| therefore I added this special decomposition rules here. |
| ''' |
| special_decompose_dict = { |
| (0x2044,): [0x002F], # ⁄ → / |
| } |
| if tuple(code_point_list) in special_decompose_dict: |
| return special_decompose_dict[tuple(code_point_list)] |
| else: |
| return code_point_list |
| |
| def output_transliteration(translit_file): |
| '''Write the new transliteration to the output file''' |
| translit_file.write('\n') |
| for code_point in sorted(unicode_utils.UNICODE_ATTRIBUTES): |
| name = unicode_utils.UNICODE_ATTRIBUTES[code_point]['name'] |
| decomposition = unicode_utils.UNICODE_ATTRIBUTES[ |
| code_point]['decomposition'] |
| if decomposition.startswith('<fraction>'): |
| decomposition = decomposition[11:] |
| decomposed_code_points = [[int(x, 16) |
| for x in decomposition.split(' ')]] |
| if decomposed_code_points[0]: |
| decomposed_code_points[0] = [0x0020] \ |
| + decomposed_code_points[0] \ |
| + [0x0020] |
| while True: |
| special_decomposed_code_points = special_decompose( |
| decomposed_code_points[-1]) |
| if (special_decomposed_code_points |
| != decomposed_code_points[-1]): |
| decomposed_code_points.append( |
| special_decomposed_code_points) |
| continue |
| special_decomposed_code_points = [] |
| for decomposed_code_point in decomposed_code_points[-1]: |
| special_decomposed_code_points += special_decompose( |
| [decomposed_code_point]) |
| if (special_decomposed_code_points |
| == decomposed_code_points[-1]): |
| break |
| decomposed_code_points.append( |
| special_decomposed_code_points) |
| translit_file.write('% {:s}\n'.format(name)) |
| translit_file.write('{:s} '.format( |
| unicode_utils.ucs_symbol(code_point))) |
| for index in range(0, len(decomposed_code_points)): |
| if index > 0: |
| translit_file.write(';') |
| if len(decomposed_code_points[index]) > 1: |
| translit_file.write('"') |
| for decomposed_code_point in decomposed_code_points[index]: |
| translit_file.write('{:s}'.format( |
| unicode_utils.ucs_symbol(decomposed_code_point))) |
| if len(decomposed_code_points[index]) > 1: |
| translit_file.write('"') |
| translit_file.write('\n') |
| translit_file.write('\n') |
| |
| if __name__ == "__main__": |
| PARSER = argparse.ArgumentParser( |
| description=''' |
| Generate a translit_cjk_compat file from UnicodeData.txt. |
| ''') |
| PARSER.add_argument( |
| '-u', '--unicode_data_file', |
| nargs='?', |
| type=str, |
| default='UnicodeData.txt', |
| help=('The UnicodeData.txt file to read, ' |
| + 'default: %(default)s')) |
| PARSER.add_argument( |
| '-i', '--input_file', |
| nargs='?', |
| type=str, |
| help=''' The original glibc/localedata/locales/translit_fraction |
| file.''') |
| PARSER.add_argument( |
| '-o', '--output_file', |
| nargs='?', |
| type=str, |
| default='translit_fraction.new', |
| help='''The new translit_fraction file, default: %(default)s. If the |
| original glibc/localedata/locales/translit_fraction file has |
| been given as an option, the header up to the |
| “translit_start” line and the tail from the “translit_end” |
| line to the end of the file will be copied unchanged into the |
| output file. ''') |
| PARSER.add_argument( |
| '--unicode_version', |
| nargs='?', |
| required=True, |
| type=str, |
| help='The Unicode version of the input files used.') |
| ARGS = PARSER.parse_args() |
| |
| unicode_utils.fill_attributes(ARGS.unicode_data_file) |
| HEAD = TAIL = '' |
| if ARGS.input_file: |
| (HEAD, TAIL) = read_input_file(ARGS.input_file) |
| with open(ARGS.output_file, mode='w') as TRANSLIT_FILE: |
| output_head(TRANSLIT_FILE, ARGS.unicode_version, head=HEAD) |
| output_transliteration(TRANSLIT_FILE) |
| output_tail(TRANSLIT_FILE, tail=TAIL) |