From: Cibu C J (email@example.com)
Date: Mon Jul 16 2007 - 20:02:31 CDT
On 7/16/07, Kenneth Whistler <firstname.lastname@example.org> wrote:
> Combining category 224 characters *don't* "stack to the left".
> I defy you to find any part of the Unicode Standard that
> does now or ever has required that left-side combining
> marks stack leftward. That is just an unreasonable thing to require
> of rendering engines.
> There are only two of them, by the way, that have ever been
> defined in the standard.
> 302E..302F ; 224 # Mn  HANGUL SINGLE DOT TONE MARK..HANGUL DOUBLE
> TONE MARK
> And just as for left side Indic matra combining marks
> (combining class 0), there isn't any reasonable, meaningful
> text reason to stack these. If I encounter a Hangul
> syllable followed by 6 single dot tone marks, I would
> fully expect a renderer to bail after the first of those
> was displayed to the left of the Hangul syllable, and have
> the next 5 be displayed with fallback on a dotted circle
> (or otherwise).
> > As long as this stays within
> > a line (with some not-too-small preset max), there should
> > be no problem. (It would have been better to just give
> > the reordrant vowels cc 224 rather than 0!)
> Mistaken premise. I'm willing to bet that there is indeed
> a problem with expecting rendering engines to stack
> ccc=224 marks indefinitely.
In Malayalam, there is a case of left side stacking when sign for semi-vowel
RA is followed by any E, EE, O, OO or AU vowel signs. For example ക്രെ (<KA,
VIRAMA, RA, VOWEL SIGN E>.
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