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bug#20173: 24.4; Rendering misallocates combining marks on ligatures
From: |
Richard Wordingham |
Subject: |
bug#20173: 24.4; Rendering misallocates combining marks on ligatures |
Date: |
Fri, 27 Mar 2015 09:04:44 +0000 |
On Tue, 24 Mar 2015 19:03:38 +0200
Eli Zaretskii <eliz@gnu.org> wrote:
> > Date: Tue, 24 Mar 2015 08:28:28 +0000
> > From: Richard Wordingham <richard.wordingham@ntlworld.com>
> > Cc: 20173@debbugs.gnu.org
> > You might want to first check whether composed Arabic is
> > usable. Doesn't making each word a grapheme cluster makes editing
> > unpleasant?
> I don't know; I don't speak or write any of the languages that use the
> Arabic script. I expect the users that do to come up and ask for
> features they miss. We already allow deletion of single codepoints,
> even when they are composed; we might as well provide similar features
> for movement or whatever.
I forgot that grapheme clustering is done in m17n, not Emacs itself.
The m17n code (in ARAB-OTF.flt) is reasonable - it clusters letters
with combining marks. It *seems* I have a problem with tpu-forward-char
and tpu-backward-char; it's as though there's an initialisation fault
which stops them stepping through the Arabic compositions at first. It
may be an issue with the presumably underlying forward-char and
backward-char; I haven't investigated further. I'll have to record
the exact actions provoking the problem before I formally record a bug.
Richard.
- bug#20173: 24.4; Rendering misallocates combining marks on ligatures, Richard Wordingham, 2015/03/22
- bug#20173: 24.4; Rendering misallocates combining marks on ligatures, Eli Zaretskii, 2015/03/23
- bug#20173: 24.4; Rendering misallocates combining marks on ligatures, Richard Wordingham, 2015/03/23
- bug#20173: 24.4; Rendering misallocates combining marks on ligatures, Eli Zaretskii, 2015/03/23
- bug#20173: 24.4; Rendering misallocates combining marks on ligatures, Richard Wordingham, 2015/03/24
- bug#20173: 24.4; Rendering misallocates combining marks on ligatures, Eli Zaretskii, 2015/03/24
- bug#20173: 24.4; Rendering misallocates combining marks on ligatures, Richard Wordingham, 2015/03/24
- bug#20173: 24.4; Rendering misallocates combining marks on ligatures,
Richard Wordingham <=
- bug#20173: 24.4; Rendering misallocates combining marks on ligatures, Eli Zaretskii, 2015/03/27