From: Jungshik Shin (email@example.com)
Date: Mon Apr 21 2003 - 22:27:04 EDT
On Mon, 21 Apr 2003 Peter_Constable@sil.org wrote:
> James Clark wrote on 04/20/2003 08:39:33 PM:
> > As I understand it, grapheme cluster boundaries are supposed to be
> > useful for things like cursor movement: a reasonable default action for
> > the right arrow key would be to move over one grapheme cluster. For
> > this reason, I wouldn't expect there to be a boundary before a left-side
> > dependent vowel: the cursor would have to bounce backwards and forwards
> > if there was such a boundary.
> The cursor might similarly bounce back and forth in bidi text; if such
> behaviour is acceptable for bidi text, might it also be considered
> acceptable for Indic-reordering text?
I think two cases are distinct. In bidi text, bouncing back and forth
is across grapheme boundaries while in what James described, it's
within a single grapheme. BTW, in some cases, users may want the cursor
(delete/backspace) to move within a single grapheme (to operate on
letter-basis) especially at the pre-editing stage (when entering a
syllable made up of 4 or 5 letters, it is inconvenient to start all the
way from the first letter just to correct one letter.). So in that case,
bouncing back and forth may be not just acceptable but necessary.
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