bug#20140: 24.4; M17n shaper output rejected

[Richard Wordingham]

On Wed, 25 Mar 2015 23:25:54 +0900
handa@gnu.org (K. Handa) wrote:

> Hi, thank you for the detailed explanation.
> 
> In article <20150321175818.1b125eba@JRWUBU2>, Richard Wordingham
> <richard.wordingham@ntlworld.com> writes:
> 
> > What I ought to want is SIL's split cursor scheme, which indicated
> > the next ('point') and previous characters, even in bidirectional
> > text. Unfortunately, that's not compatible with m17n, which seems
> > to assume that cursor position will be a single number.  

> > The Emacs
> > functions forward-char-intrusive and backward-char-intrusive
> > provided a pleasant, more intuitive, alternative, and I am sad to
> > hear they are gone. Perhaps I'll have to start using
> > toggle-auto-composition.
> 
> Those Emacs functions are just my idea for improving Emacs
> for CTL users, and have never been included in the official
> Emacs verison.

I think I must have confused them with the behaviour of Emacs 22.1
on Windows XP.  I didn't do anything to enable the visual decomposition
of the clusters - it just happened when moving with the arrow keys.
Indeed, it is conceivable that the characters weren't decomposed, but
were simply being rendered by Windows without any need for composition.

I haven't had time to try out the experimental code yet.

Richard.