Re: How to write command for select range of Chinese text

#!/usr/bin/python
#vim:fileencoding=utf-8:sw=4:et
'''Visual select Chinese text from a start point to an end point.'''

import vim

def get_chinese(start_row, start_col, end_row, end_col):
'''Get Chinese text segment in the given range.
Default text encoding is UTF-8 (from :set encoding=xxx)

return tuple (start, end) where
start = (chinese_start_row, chinese_start_col)
end = (chinese_end_row, chinese_end_col)
'''
buffer = vim.current.buffer
encoding = vim.eval('&encoding')
if encoding is not None and len(encoding) == 0:
encoding = 'UTF-8'
start = None
end = None
for row in range(start_row, end_row):
raw_line = buffer[row]
line = raw_line.decode(encoding)
c0 = 0
c1 = len(line)
if row == start_row:
c0 = start_col
if row == end_row:
c1 = end_col
for col in range(c0, c1):
c = line[col]
if c.isspace():
continue
#ucode = ord(c)
# FIXME: You can add extA/B/C/D here if you like.
#if ucode >= 0x4E00 and ucode <=0x9FFF:
if c >= u'\u4E00' and c <=u'\u9FFF':
if start is None:
raw_c = c.encode(encoding)
find_start = 0
if row == start_row:
find_start = start_col
mark_col = raw_line.find(raw_c, find_start)
start = (row, mark_col)
elif start is not None:
raw_c = c.encode(encoding)
find_start = 0
if row == start[0]:
find_start = start[1]
mark_col = raw_line.find(raw_c, find_start)
if mark_col == 0:
mark_col = len(buffer[row-1])
print mark_col
end = (row-1, mark_col)
else:
end = (row, mark_col-1)
break
if end is not None:
break

if start is not None and end is None:
end = (end_row, end_col)
return start, end

def select_chinese(start_row, start_col, end_row, end_col):
'''Visual select Chinese from the given range.'''
start, end = get_chinese(start_row, start_col, end_row, end_col)
if start is not None:
# fix vim index in which line starts from 1
start = (start[0]+1, start[1])
end = (end[0]+1, end[1])
win = vim.current.window
win.cursor = start
vim.command('normal v')
win.cursor = end

On 06/17/2011 11:00 PM, ZyX wrote:
> Reply to message «Re: How to write command for select range of Chinese text»,
> sent 09:17:23 17 June 2011, Friday
> by Tony Mechelynck:
>
>> Well, in Vim /[] constructs are limited to approximately 256 character
>> values (or maybe 257)
> 1. 257 exactly.
> 2. Not collections themselves, but ranges within collections.
> 3. In current implementation collection with large number of characters should
> be very slow.
> 4. You can always emulate it with `\%(char1\|char2\|...\|char100500\)' though it
> will be even slower.

Here is a python script that does the job. It visually select Chinese
text in a given range. Hopefully, faster than vim builtin calls.

:py sys.path.append(PLUGINPATH)
:py import select_chinese
:py import select_chinese.select_chinese(0, 0, 100, 20)

This one select Chinese text from row 0, col 0 to row 100, col 20

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