/usr/lib/python3/dist-packages/urwid/old_str_util.py is in python3-urwid 2.0.1-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 | #!/usr/bin/python
# -*- coding: utf-8 -*-
#
# Urwid unicode character processing tables
# Copyright (C) 2004-2011 Ian Ward
#
# This 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.
#
# This 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 this library; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# Urwid web site: http://excess.org/urwid/
from __future__ import division, print_function
import re
from urwid.compat import bytes, B, ord2, text_type
SAFE_ASCII_RE = re.compile(u"^[ -~]*$")
SAFE_ASCII_BYTES_RE = re.compile(B("^[ -~]*$"))
_byte_encoding = None
# GENERATED DATA
# generated from
# http://www.unicode.org/Public/4.0-Update/EastAsianWidth-4.0.0.txt
widths = [
(126, 1),
(159, 0),
(687, 1),
(710, 0),
(711, 1),
(727, 0),
(733, 1),
(879, 0),
(1154, 1),
(1161, 0),
(4347, 1),
(4447, 2),
(7467, 1),
(7521, 0),
(8369, 1),
(8426, 0),
(9000, 1),
(9002, 2),
(11021, 1),
(12350, 2),
(12351, 1),
(12438, 2),
(12442, 0),
(19893, 2),
(19967, 1),
(55203, 2),
(63743, 1),
(64106, 2),
(65039, 1),
(65059, 0),
(65131, 2),
(65279, 1),
(65376, 2),
(65500, 1),
(65510, 2),
(120831, 1),
(262141, 2),
(1114109, 1),
]
# ACCESSOR FUNCTIONS
def get_width( o ):
"""Return the screen column width for unicode ordinal o."""
global widths
if o == 0xe or o == 0xf:
return 0
for num, wid in widths:
if o <= num:
return wid
return 1
def decode_one( text, pos ):
"""
Return (ordinal at pos, next position) for UTF-8 encoded text.
"""
assert isinstance(text, bytes), text
b1 = ord2(text[pos])
if not b1 & 0x80:
return b1, pos+1
error = ord("?"), pos+1
lt = len(text)
lt = lt-pos
if lt < 2:
return error
if b1 & 0xe0 == 0xc0:
b2 = ord2(text[pos+1])
if b2 & 0xc0 != 0x80:
return error
o = ((b1&0x1f)<<6)|(b2&0x3f)
if o < 0x80:
return error
return o, pos+2
if lt < 3:
return error
if b1 & 0xf0 == 0xe0:
b2 = ord2(text[pos+1])
if b2 & 0xc0 != 0x80:
return error
b3 = ord2(text[pos+2])
if b3 & 0xc0 != 0x80:
return error
o = ((b1&0x0f)<<12)|((b2&0x3f)<<6)|(b3&0x3f)
if o < 0x800:
return error
return o, pos+3
if lt < 4:
return error
if b1 & 0xf8 == 0xf0:
b2 = ord2(text[pos+1])
if b2 & 0xc0 != 0x80:
return error
b3 = ord2(text[pos+2])
if b3 & 0xc0 != 0x80:
return error
b4 = ord2(text[pos+2])
if b4 & 0xc0 != 0x80:
return error
o = ((b1&0x07)<<18)|((b2&0x3f)<<12)|((b3&0x3f)<<6)|(b4&0x3f)
if o < 0x10000:
return error
return o, pos+4
return error
def decode_one_uni(text, i):
"""
decode_one implementation for unicode strings
"""
return ord(text[i]), i+1
def decode_one_right(text, pos):
"""
Return (ordinal at pos, next position) for UTF-8 encoded text.
pos is assumed to be on the trailing byte of a utf-8 sequence.
"""
assert isinstance(text, bytes), text
error = ord("?"), pos-1
p = pos
while p >= 0:
if ord2(text[p])&0xc0 != 0x80:
o, next = decode_one( text, p )
return o, p-1
p -=1
if p == p-4:
return error
def set_byte_encoding(enc):
assert enc in ('utf8', 'narrow', 'wide')
global _byte_encoding
_byte_encoding = enc
def get_byte_encoding():
return _byte_encoding
def calc_text_pos(text, start_offs, end_offs, pref_col):
"""
Calculate the closest position to the screen column pref_col in text
where start_offs is the offset into text assumed to be screen column 0
and end_offs is the end of the range to search.
text may be unicode or a byte string in the target _byte_encoding
Returns (position, actual_col).
"""
assert start_offs <= end_offs, repr((start_offs, end_offs))
utfs = isinstance(text, bytes) and _byte_encoding == "utf8"
unis = not isinstance(text, bytes)
if unis or utfs:
decode = [decode_one, decode_one_uni][unis]
i = start_offs
sc = 0
n = 1 # number to advance by
while i < end_offs:
o, n = decode(text, i)
w = get_width(o)
if w+sc > pref_col:
return i, sc
i = n
sc += w
return i, sc
assert type(text) == bytes, repr(text)
# "wide" and "narrow"
i = start_offs+pref_col
if i >= end_offs:
return end_offs, end_offs-start_offs
if _byte_encoding == "wide":
if within_double_byte(text, start_offs, i) == 2:
i -= 1
return i, i-start_offs
def calc_width(text, start_offs, end_offs):
"""
Return the screen column width of text between start_offs and end_offs.
text may be unicode or a byte string in the target _byte_encoding
Some characters are wide (take two columns) and others affect the
previous character (take zero columns). Use the widths table above
to calculate the screen column width of text[start_offs:end_offs]
"""
assert start_offs <= end_offs, repr((start_offs, end_offs))
utfs = isinstance(text, bytes) and _byte_encoding == "utf8"
unis = not isinstance(text, bytes)
if (unis and not SAFE_ASCII_RE.match(text)
) or (utfs and not SAFE_ASCII_BYTES_RE.match(text)):
decode = [decode_one, decode_one_uni][unis]
i = start_offs
sc = 0
n = 1 # number to advance by
while i < end_offs:
o, n = decode(text, i)
w = get_width(o)
i = n
sc += w
return sc
# "wide", "narrow" or all printable ASCII, just return the character count
return end_offs - start_offs
def is_wide_char(text, offs):
"""
Test if the character at offs within text is wide.
text may be unicode or a byte string in the target _byte_encoding
"""
if isinstance(text, text_type):
o = ord(text[offs])
return get_width(o) == 2
assert isinstance(text, bytes)
if _byte_encoding == "utf8":
o, n = decode_one(text, offs)
return get_width(o) == 2
if _byte_encoding == "wide":
return within_double_byte(text, offs, offs) == 1
return False
def move_prev_char(text, start_offs, end_offs):
"""
Return the position of the character before end_offs.
"""
assert start_offs < end_offs
if isinstance(text, text_type):
return end_offs-1
assert isinstance(text, bytes)
if _byte_encoding == "utf8":
o = end_offs-1
while ord2(text[o])&0xc0 == 0x80:
o -= 1
return o
if _byte_encoding == "wide" and within_double_byte(text,
start_offs, end_offs-1) == 2:
return end_offs-2
return end_offs-1
def move_next_char(text, start_offs, end_offs):
"""
Return the position of the character after start_offs.
"""
assert start_offs < end_offs
if isinstance(text, text_type):
return start_offs+1
assert isinstance(text, bytes)
if _byte_encoding == "utf8":
o = start_offs+1
while o<end_offs and ord2(text[o])&0xc0 == 0x80:
o += 1
return o
if _byte_encoding == "wide" and within_double_byte(text,
start_offs, start_offs) == 1:
return start_offs +2
return start_offs+1
def within_double_byte(text, line_start, pos):
"""Return whether pos is within a double-byte encoded character.
text -- byte string in question
line_start -- offset of beginning of line (< pos)
pos -- offset in question
Return values:
0 -- not within dbe char, or double_byte_encoding == False
1 -- pos is on the 1st half of a dbe char
2 -- pos is on the 2nd half of a dbe char
"""
assert isinstance(text, bytes)
v = ord2(text[pos])
if v >= 0x40 and v < 0x7f:
# might be second half of big5, uhc or gbk encoding
if pos == line_start: return 0
if ord2(text[pos-1]) >= 0x81:
if within_double_byte(text, line_start, pos-1) == 1:
return 2
return 0
if v < 0x80: return 0
i = pos -1
while i >= line_start:
if ord2(text[i]) < 0x80:
break
i -= 1
if (pos - i) & 1:
return 1
return 2
# TABLE GENERATION CODE
def process_east_asian_width():
import sys
out = []
last = None
for line in sys.stdin.readlines():
if line[:1] == "#": continue
line = line.strip()
hex,rest = line.split(";",1)
wid,rest = rest.split(" # ",1)
word1 = rest.split(" ",1)[0]
if "." in hex:
hex = hex.split("..")[1]
num = int(hex, 16)
if word1 in ("COMBINING","MODIFIER","<control>"):
l = 0
elif wid in ("W", "F"):
l = 2
else:
l = 1
if last is None:
out.append((0, l))
last = l
if last == l:
out[-1] = (num, l)
else:
out.append( (num, l) )
last = l
print("widths = [")
for o in out[1:]: # treat control characters same as ascii
print("\t%r," % (o,))
print("]")
if __name__ == "__main__":
process_east_asian_width()
|