From: Peter Constable (petercon@microsoft.com)
Date: Tue Jun 14 2005 - 17:39:04 CDT
> From: Patrick Andries [mailto:patrick.andries@xcential.com]
> For instance, it is not possible to visual select only the split vowel
> in Powerpoint, or BabelMap for that matter (the whole syllable with
its
> surrounded consonant gets selected). But a single backspace when the
> cursor is positionned at the end of the Tamil syllable does delete the
> split vowel surrounding the consonant (ka).
This reflects a general problem wrt selection. If an app supports
selection of the left-half component of the vowel, what happens when the
character sequence in the backing store is < 0b95 KA, 0bca VOWEL SIGN O
>? Even if the backing store is < 0b95 KA, 0bc6 VOWEL SIGN E, 0bbe VOWEL
SIGN AA >, when the user clicks between the glyph for E and the glyph
for KA, where are you in the backing store, and how do you communicate
that to the user?
At a minimum, doing what you're asking, ignoring the issues specific to
pre-composed multi-part vowels, requires support for split cursors which
come with some significant usability issues.
Peter Constable
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