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[Bug 19505] Describe visual direction when document encoding is iso-8859-8

From: <bugzilla@jessica.w3.org>
Date: Tue, 27 Nov 2012 22:12:40 +0000
To: public-css-bugzilla@w3.org
Message-ID: <bug-19505-5148-8V0g8PE41q@http.www.w3.org/Bugs/Public/>
https://www.w3.org/Bugs/Public/show_bug.cgi?id=19505

--- Comment #13 from Simon Montagu <smontagu@smontagu.org> ---
(In reply to comment #12)
> The one thing you can't simulate that way is the interaction with actual
> Unicode bidi control codes: those are ignored/treated as invisible neutral
> characters afaict.

That seems not unreasonable, on the assumption that (a) the bidi control codes
exist to fine-tune the UBA and (b) visual direction bypasses the UBA
altogether.

(One has to make some assumptions, since AFAIK visual direction isn't formally
defined anywhere and is only defined de facto by what authors did to get RTL
pages looking reasonable on browsers without proper Bidi support. Thus the
exception for form controls comes from the fact that form controls in browsers
from that period were generally implemented by native OS widgets, which
generally did have Bidi support on popular OSs in RTL locales)

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