Re: BidiMirrored property and ancient scripts (Was Re: Plain text custom fraction input)

2015-07-25 Thread Eli Zaretskii
> Date: Sat, 25 Jul 2015 14:36:51 +0100 > From: Richard Wordingham > > > > The issue lies with the wording of condition (1). One might expect > > > it to apply only to characters with a bidirectional type of L. > > > I see no reason to restrict this to L characters. I'd be interested > > to he

Re: BidiMirrored property and ancient scripts (Was Re: Plain text custom fraction input)

2015-07-25 Thread Richard Wordingham
On Sat, 25 Jul 2015 12:52:53 +0300 Eli Zaretskii wrote: > > Date: Sat, 25 Jul 2015 10:11:02 +0100 > > From: Richard Wordingham > > > > On Sat, 25 Jul 2015 10:51:19 +0300 > > Eli Zaretskii wrote: > If your implementation's purpose is to illustrate random permutations > of glyphs, or artificial

Re: BidiMirrored property and ancient scripts (Was Re: Plain text custom fraction input)

2015-07-25 Thread Eli Zaretskii
> Date: Sat, 25 Jul 2015 10:11:02 +0100 > From: Richard Wordingham > > On Sat, 25 Jul 2015 10:51:19 +0300 > Eli Zaretskii wrote: > > > > Reread the Bidi algorithm, especially > > > http://www.unicode.org/reports/tr9/#L4 and > > > http://www.unicode.org/reports/tr9/#HL6. > > > > > > In principl

Re: BidiMirrored property and ancient scripts (Was Re: Plain text custom fraction input)

2015-07-25 Thread Richard Wordingham
On Sat, 25 Jul 2015 10:51:19 +0300 Eli Zaretskii wrote: > > Reread the Bidi algorithm, especially > > http://www.unicode.org/reports/tr9/#L4 and > > http://www.unicode.org/reports/tr9/#HL6. > > > > In principle, I could have a higher-level protocol that mirrors > > lamedh on Wednesdays, but I mu

Re: BidiMirrored property and ancient scripts (Was Re: Plain text custom fraction input)

2015-07-25 Thread Eli Zaretskii
> Date: Sat, 25 Jul 2015 08:44:22 +0100 > From: Richard Wordingham > > On Sat, 25 Jul 2015 10:14:58 +0300 > Eli Zaretskii wrote: > > > From: Richard Wordingham > > > Asmus Freytag wrote: > > > > > We do want "BidiMirrorred=No" to be honored; for example for the > > > > arrows and the ornate

Re: BidiMirrored property and ancient scripts (Was Re: Plain text custom fraction input)

2015-07-25 Thread Richard Wordingham
On Sat, 25 Jul 2015 10:14:58 +0300 Eli Zaretskii wrote: > From: Richard Wordingham > > Asmus Freytag wrote: > > > We do want "BidiMirrorred=No" to be honored; for example for the > > > arrows and the ornate parens. And we do not want that to be > > > overridden > > And at present, that may b

Re: BidiMirrored property and ancient scripts (Was Re: Plain text custom fraction input)

2015-07-25 Thread Eli Zaretskii
> Date: Fri, 24 Jul 2015 21:23:52 +0100 > From: Richard Wordingham > > On Fri, 24 Jul 2015 10:09:18 -0700 > Asmus Freytag wrote: > > > On 7/24/2015 2:59 AM, Frédéric Grosshans wrote: > > > Let me rephrase my remark in a less “stupid and dangerous” way. > > > > > >If a LTR character has the

Re: BidiMirrored property and ancient scripts (Was Re: Plain text custom fraction input)

2015-07-25 Thread Richard Wordingham
On Fri, 24 Jul 2015 23:11:24 + Murray Sargent wrote: > Richard questions when mirroring is used. As Ken points out, in > modern BiDi text, such as Arabic and Hebrew, the answer is given by > the Unicode BiDi Algorithm and associated tables. In ancient scripts > and in Boustrophedon, it's give

Re: BidiMirrored property and ancient scripts (Was Re: Plain text custom fraction input)

2015-07-24 Thread Richard Wordingham
On Fri, 24 Jul 2015 10:09:18 -0700 Asmus Freytag wrote: > On 7/24/2015 2:59 AM, Frédéric Grosshans wrote: > > Let me rephrase my remark in a less “stupid and dangerous” way. > > > >If a LTR character has the BidiMirrored=No property, it may > > either be mirrored or not when typeset in RTL, d

Re: BidiMirrored property and ancient scripts (Was Re: Plain text custom fraction input)

2015-07-24 Thread Richard Wordingham
On Fri, 24 Jul 2015 09:28:05 -0700 Ken Whistler wrote: > First there is a general issue of general mirroring of body text for > some ancient scripts, which in paleographic contexts often followed > conventions (no longer seen, except in rare edge cases) of having the > direction of glyph orientat

Re: BidiMirrored property and ancient scripts (Was Re: Plain text custom fraction input)

2015-07-24 Thread Asmus Freytag
On 7/24/2015 2:59 AM, Frédéric Grosshans wrote: Let me rephrase my remark in a less “stupid and dangerous” way. If a LTR character has the BidiMirrored=No property, it may either be mirrored or not when typeset in RTL, depending on other factors. Specifically, the BidiMirrored property

Re: BidiMirrored property and ancient scripts (Was Re: Plain text custom fraction input)

2015-07-24 Thread Ken Whistler
On 7/24/2015 2:59 AM, Frédéric Grosshans wrote: Is that better ? Once again, I agree that forbidding ancient Egyptian to be mirrored when “stupid and dangerous” I can see that this thread seems to have gone off the rails a bit. The Unicode Standard does not forbid Egyptian hieroglyphs from

Re: BidiMirrored property and ancient scripts (Was Re: Plain text custom fraction input)

2015-07-24 Thread Richard Wordingham
On Thu, 23 Jul 2015 19:42:50 +0100 Richard Wordingham wrote: > If the hieroglyphs had had the BidiMirrored property corrected to Yes, > one could have had, in plain text, once fonts had caught up: > > for nṯr in normal left-to-right > text FORMATTING> for nṯr in retrograde left-to-right text

Re: BidiMirrored property and ancient scripts (Was Re: Plain text custom fraction input)

2015-07-24 Thread Frédéric Grosshans
Le 23/07/2015 20:42, Richard Wordingham a écrit : On Thu, 23 Jul 2015 12:00:06 +0200 Frédéric Grosshans wrote: Le 23/07/2015 00:54, Richard Wordingham a écrit : Which means that Ancient Egyptian hieroglyphs are unencoded! Their default direction is right-to-left, but that's only the start of

Re: BidiMirrored property and ancient scripts (Was Re: Plain text custom fraction input)

2015-07-23 Thread Richard Wordingham
On Thu, 23 Jul 2015 12:00:06 +0200 Frédéric Grosshans wrote: > Le 23/07/2015 00:54, Richard Wordingham a écrit : > > Which means that Ancient Egyptian hieroglyphs are unencoded! Their > > default direction is right-to-left, but that's only the start of the > > trouble. The encoded hieroglyphs a

Re: BidiMirrored property and ancient scripts (Was Re: Plain text custom fraction input)

2015-07-23 Thread Ken Whistler
On 7/23/2015 3:00 AM, Frédéric Grosshans wrote: By the way, I think a comment should be added in the §4.7 of the standard to clarify that the BidiMirrored property is not intended for cases like hieroglyphs or italic. This eminently sensible suggestion has been passed along to the Unico

BidiMirrored property and ancient scripts (Was Re: Plain text custom fraction input)

2015-07-23 Thread Frédéric Grosshans
Le 23/07/2015 00:54, Richard Wordingham a écrit : Which means that Ancient Egyptian hieroglyphs are unencoded! Their default direction is right-to-left, but that's only the start of the trouble. The encoded hieroglyphs aren't Bidi-mirrored, so if I embed then in a right-to-left override, I shou