From: Philippe Verdy (email@example.com)
Date: Fri Aug 08 2003 - 11:21:08 EDT
On Monday, August 04, 2003 11:59 PM, Kenneth Whistler <firstname.lastname@example.org> wrote:
> The function I think you have in mind is not isolated display of
> a combining mark, but rather trying to find a mechanism for
> getting around the conformance strictures of the standard, to
> get a combining mark to apply to a *following* base
> character, rather than to a *preceding* base character.
> Trying to use U+FEFF *or* U+2060 to do this would be inappropriate.
I tried this sequence and it seems to have the correct behavior including
for line breaking and word breaking:
<some text>, <ZWSP, Combining Acute Accent, CGJ, A>, <B>
It renders as some text, with a break opportunity before the ZWSP,
a isolated accute accent combined with the following letter A, but
this last combination depends on fonts (if they support CGJ to
change the encoding order so that previous diacritics can combine
in the same combining sequence as the next base character).
This is quite tricky I admit, and I just wonder what is the correct
usage of CGJ before a base character like Latin Capital Letter A.
May be a distinct combining character could be used, but I
wonder which one (CGJ is supposed to create some ligature
between two normally distinct combining sequences each one
containing at least 1 base character. There's been a recent
discussion to use it also before a combining character and not
only before a base character.
If the initial break opportunity is undesirable, because the accented
letter A is in the same word as the previous <some text>, then one
can replace ZWSP (which is considered as white-space and thus a
word separator) by a Word-Joiner control (preferably to the ZWNBSP
U+FEFF whose usage in plain text is now deprecated if it is not used
as a BOM, and preferably not a ligating format control which would
have the undesirable effect of instructing the renderer to try using
a ligated glyph for the combined sequence, and thus alter the
semantic or appearance of the rendered text, where it was not
intended that the combining mark should have any implied glyph
relation with the previous base character)
-- Philippe. Spams non tolérés: tout message non sollicité sera rapporté à vos fournisseurs de services Internet.
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