Red Hat Bugzilla – Bug 208511
"info" cannot deal with CJK characters
Last modified: 2008-11-20 05:45:24 EST
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User-Agent: Mozilla/5.0 (X11; U; Linux i686; zh-CN; rv:188.8.131.52) Gecko/20060913 Fedora/184.108.40.206-1.fc5 Firefox/220.127.116.11 pango-text
Description of problem:
The standalone info cannot realize that a CJK character takes double width of a ASCII character and is individable. Info counts characters by its byte amount, but not its real character, and doesn't display them correctly.
For example, what I wrote was a Chinese info page, but I cannot place 40 Chinese characters in a line, there were only 26 and when I resize the terminal many characters broken.
by the way, the "makeinfo" just cannot deal with my name! It becomes a strange word.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Just use "makeinfo" to deal a caracter like "样"(UTF-8:E4 BD 95) or "楠"(UTF-8:E6 A5 A0)(and there are many others) and each lost a byte.
2. Build some CJK .info page and watch it.
3. resize the terminal, count for the characters.
Characters broken, they can't fill lines, and individual characters breaks at line end.
A character use three or more bytes, but they takes two spaces, and cannot be broken.
Created attachment 141191 [details]
texinfo test file
I think I have reproduced this. Essentially, what is happening is the
standalone info is splitting up multibyte characters when the terminal window is
(In reply to comment #0)
> Description of problem:
> The standalone info cannot realize that a CJK character takes double width of
a ASCII character and is individable.
I should correct you here: the CJK character takes three times the width of an
ASCII character. But anyway, your point is still true: I have reproduced this
problem. However, the bug is reported against the wrong component: the emacs
packages do not supply the standalone info program, so I am going to reassign
this bug to the texinfo maintainer.
If I'm not wrong there is no utf8 support in info. I don't
even understand why some multibyte characters appear rightly.
Created attachment 142775 [details]
Make makeinfo multibyte-aware
I have just sent this patch upstream.
Created attachment 142865 [details]
Make makeinfo multibyte-aware
Created attachment 146442 [details]
Clean up of the above patch: use the mbswidth module from gnulib
Created attachment 148073 [details]
Add !HAVE_MBRTOWC fallbacks to gnulib's multibyte handling interfaces
Created attachment 148074 [details]
Make info multibyte-aware
The above patches have all been submitted upstream, and handle everything but
input of multibyte characters in the info modeline (e.g. searching for
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Is it fixed, or not?
No, it is not. Patches sent to upstream by Miloslav, but still not included in
4.11. But it should be fixed in 4.12 (see Changelog), so I will check it after
update to 4.12 in Rawhide.
Changing version to '9' as part of upcoming Fedora 9 GA.
More information and reason for this action is here:
I tested 4.12 version... it still doesn't work:(
Fixed in texinfo-4.13-1.