urwid isn't a submodule any more
This commit is contained in:
Aaron Gutierrez
368
urwid/old_str_util.py
Executable file
368
urwid/old_str_util.py
Executable file
@@ -0,0 +1,368 @@
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#!/usr/bin/python
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# -*- coding: utf-8 -*-
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#
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# Urwid unicode character processing tables
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# Copyright (C) 2004-2011 Ian Ward
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#
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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# Urwid web site: http://excess.org/urwid/
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from __future__ import print_function
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import re
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from urwid.compat import bytes, B, ord2
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SAFE_ASCII_RE = re.compile(u"^[ -~]*$")
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SAFE_ASCII_BYTES_RE = re.compile(B("^[ -~]*$"))
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_byte_encoding = None
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# GENERATED DATA
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# generated from
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# http://www.unicode.org/Public/4.0-Update/EastAsianWidth-4.0.0.txt
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widths = [
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(126, 1),
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(159, 0),
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(687, 1),
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(710, 0),
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(711, 1),
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(727, 0),
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(733, 1),
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(879, 0),
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(1154, 1),
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(1161, 0),
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(4347, 1),
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(4447, 2),
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(7467, 1),
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(7521, 0),
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(8369, 1),
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(8426, 0),
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(9000, 1),
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(9002, 2),
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(11021, 1),
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(12350, 2),
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(12351, 1),
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(12438, 2),
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(12442, 0),
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(19893, 2),
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(19967, 1),
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(55203, 2),
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(63743, 1),
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(64106, 2),
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(65039, 1),
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(65059, 0),
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(65131, 2),
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(65279, 1),
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(65376, 2),
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(65500, 1),
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(65510, 2),
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(120831, 1),
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(262141, 2),
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(1114109, 1),
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]
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# ACCESSOR FUNCTIONS
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def get_width( o ):
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"""Return the screen column width for unicode ordinal o."""
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global widths
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if o == 0xe or o == 0xf:
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return 0
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for num, wid in widths:
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if o <= num:
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return wid
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return 1
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def decode_one( text, pos ):
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"""
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Return (ordinal at pos, next position) for UTF-8 encoded text.
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"""
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assert isinstance(text, bytes), text
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b1 = ord2(text[pos])
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if not b1 & 0x80:
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return b1, pos+1
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error = ord("?"), pos+1
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lt = len(text)
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lt = lt-pos
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if lt < 2:
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return error
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if b1 & 0xe0 == 0xc0:
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b2 = ord2(text[pos+1])
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if b2 & 0xc0 != 0x80:
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return error
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o = ((b1&0x1f)<<6)|(b2&0x3f)
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if o < 0x80:
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return error
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return o, pos+2
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if lt < 3:
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return error
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if b1 & 0xf0 == 0xe0:
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b2 = ord2(text[pos+1])
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if b2 & 0xc0 != 0x80:
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return error
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b3 = ord2(text[pos+2])
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if b3 & 0xc0 != 0x80:
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return error
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o = ((b1&0x0f)<<12)|((b2&0x3f)<<6)|(b3&0x3f)
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if o < 0x800:
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return error
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return o, pos+3
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if lt < 4:
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return error
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if b1 & 0xf8 == 0xf0:
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b2 = ord2(text[pos+1])
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if b2 & 0xc0 != 0x80:
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return error
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b3 = ord2(text[pos+2])
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if b3 & 0xc0 != 0x80:
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return error
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b4 = ord2(text[pos+2])
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if b4 & 0xc0 != 0x80:
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return error
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o = ((b1&0x07)<<18)|((b2&0x3f)<<12)|((b3&0x3f)<<6)|(b4&0x3f)
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if o < 0x10000:
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return error
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return o, pos+4
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return error
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def decode_one_uni(text, i):
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"""
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decode_one implementation for unicode strings
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"""
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return ord(text[i]), i+1
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def decode_one_right(text, pos):
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"""
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Return (ordinal at pos, next position) for UTF-8 encoded text.
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pos is assumed to be on the trailing byte of a utf-8 sequence.
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"""
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assert isinstance(text, bytes), text
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error = ord("?"), pos-1
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p = pos
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while p >= 0:
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if ord2(text[p])&0xc0 != 0x80:
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o, next = decode_one( text, p )
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return o, p-1
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p -=1
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if p == p-4:
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return error
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def set_byte_encoding(enc):
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assert enc in ('utf8', 'narrow', 'wide')
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global _byte_encoding
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_byte_encoding = enc
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def get_byte_encoding():
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return _byte_encoding
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def calc_text_pos(text, start_offs, end_offs, pref_col):
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"""
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Calculate the closest position to the screen column pref_col in text
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where start_offs is the offset into text assumed to be screen column 0
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and end_offs is the end of the range to search.
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text may be unicode or a byte string in the target _byte_encoding
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Returns (position, actual_col).
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"""
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assert start_offs <= end_offs, repr((start_offs, end_offs))
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utfs = isinstance(text, bytes) and _byte_encoding == "utf8"
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unis = not isinstance(text, bytes)
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if unis or utfs:
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decode = [decode_one, decode_one_uni][unis]
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i = start_offs
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sc = 0
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n = 1 # number to advance by
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while i < end_offs:
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o, n = decode(text, i)
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w = get_width(o)
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if w+sc > pref_col:
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return i, sc
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i = n
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sc += w
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return i, sc
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assert type(text) == bytes, repr(text)
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# "wide" and "narrow"
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i = start_offs+pref_col
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if i >= end_offs:
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return end_offs, end_offs-start_offs
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if _byte_encoding == "wide":
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if within_double_byte(text, start_offs, i) == 2:
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i -= 1
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return i, i-start_offs
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def calc_width(text, start_offs, end_offs):
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"""
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Return the screen column width of text between start_offs and end_offs.
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text may be unicode or a byte string in the target _byte_encoding
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Some characters are wide (take two columns) and others affect the
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previous character (take zero columns). Use the widths table above
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to calculate the screen column width of text[start_offs:end_offs]
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"""
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assert start_offs <= end_offs, repr((start_offs, end_offs))
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utfs = isinstance(text, bytes) and _byte_encoding == "utf8"
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unis = not isinstance(text, bytes)
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if (unis and not SAFE_ASCII_RE.match(text)
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) or (utfs and not SAFE_ASCII_BYTES_RE.match(text)):
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decode = [decode_one, decode_one_uni][unis]
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i = start_offs
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sc = 0
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n = 1 # number to advance by
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while i < end_offs:
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o, n = decode(text, i)
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w = get_width(o)
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i = n
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sc += w
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return sc
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# "wide", "narrow" or all printable ASCII, just return the character count
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return end_offs - start_offs
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def is_wide_char(text, offs):
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"""
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Test if the character at offs within text is wide.
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text may be unicode or a byte string in the target _byte_encoding
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"""
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if isinstance(text, unicode):
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o = ord(text[offs])
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return get_width(o) == 2
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assert isinstance(text, bytes)
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if _byte_encoding == "utf8":
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o, n = decode_one(text, offs)
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return get_width(o) == 2
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if _byte_encoding == "wide":
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return within_double_byte(text, offs, offs) == 1
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return False
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def move_prev_char(text, start_offs, end_offs):
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"""
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Return the position of the character before end_offs.
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"""
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assert start_offs < end_offs
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if isinstance(text, unicode):
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return end_offs-1
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assert isinstance(text, bytes)
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if _byte_encoding == "utf8":
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o = end_offs-1
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while ord2(text[o])&0xc0 == 0x80:
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o -= 1
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return o
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if _byte_encoding == "wide" and within_double_byte(text,
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start_offs, end_offs-1) == 2:
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return end_offs-2
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return end_offs-1
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def move_next_char(text, start_offs, end_offs):
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"""
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Return the position of the character after start_offs.
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"""
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assert start_offs < end_offs
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if isinstance(text, unicode):
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return start_offs+1
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assert isinstance(text, bytes)
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if _byte_encoding == "utf8":
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o = start_offs+1
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while o<end_offs and ord2(text[o])&0xc0 == 0x80:
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o += 1
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return o
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if _byte_encoding == "wide" and within_double_byte(text,
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start_offs, start_offs) == 1:
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return start_offs +2
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return start_offs+1
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def within_double_byte(text, line_start, pos):
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"""Return whether pos is within a double-byte encoded character.
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text -- byte string in question
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line_start -- offset of beginning of line (< pos)
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pos -- offset in question
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Return values:
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0 -- not within dbe char, or double_byte_encoding == False
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1 -- pos is on the 1st half of a dbe char
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2 -- pos is on the 2nd half of a dbe char
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"""
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assert isinstance(text, bytes)
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v = ord2(text[pos])
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if v >= 0x40 and v < 0x7f:
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# might be second half of big5, uhc or gbk encoding
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if pos == line_start: return 0
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if ord2(text[pos-1]) >= 0x81:
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if within_double_byte(text, line_start, pos-1) == 1:
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return 2
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return 0
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if v < 0x80: return 0
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i = pos -1
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while i >= line_start:
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if ord2(text[i]) < 0x80:
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break
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i -= 1
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if (pos - i) & 1:
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return 1
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return 2
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# TABLE GENERATION CODE
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def process_east_asian_width():
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import sys
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out = []
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last = None
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for line in sys.stdin.readlines():
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if line[:1] == "#": continue
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line = line.strip()
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hex,rest = line.split(";",1)
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wid,rest = rest.split(" # ",1)
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word1 = rest.split(" ",1)[0]
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if "." in hex:
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hex = hex.split("..")[1]
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num = int(hex, 16)
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if word1 in ("COMBINING","MODIFIER","<control>"):
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l = 0
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elif wid in ("W", "F"):
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l = 2
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else:
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l = 1
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if last is None:
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out.append((0, l))
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last = l
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if last == l:
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out[-1] = (num, l)
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else:
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out.append( (num, l) )
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last = l
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print("widths = [")
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for o in out[1:]: # treat control characters same as ascii
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print("\t%r," % (o,))
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print("]")
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if __name__ == "__main__":
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process_east_asian_width()
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