Re: [XeTeX] Handling of combining and variant selector characters in math

2016-02-10 Thread David J. Perry
I know nothing whatsoever about math, so perhaps I shouldn't even join this discussion, but I am curious. I do have considerable experience in font development and supporting things like the use of combining marks and variation selectors outside of math contexts. I looked in a font editor at

Re: [XeTeX] Handling of combining and variant selector characters in math

2016-02-10 Thread Will Robertson
On 11 Feb 2016, at 8:06 AM, David J. Perry wrote: > > I looked in a font editor at the font (XITS) that was used to produce the > sample PDF. As far as I can see, it has no support for combining marks or > variation selectors of the sort that I would expect, based on my non-math > experience.

Re: [XeTeX] Handling of combining and variant selector characters in math

2016-02-10 Thread David Carlisle
On 10 February 2016 at 21:36, David J. Perry wrote: > I know nothing whatsoever about math, so perhaps I shouldn't even join this > discussion, but I am curious. I do have considerable experience in font > development and supporting things like the use of combining marks and > variation selectors

Re: [XeTeX] Handling of combining and variant selector characters in math

2016-02-10 Thread David J. Perry
Thanks for the reply, Will. On 2/10/2016 4:52 PM, Will Robertson wrote: My understanding here is that Variant Selector acts like a character to produce a difference glyph (analogous to a ligature), so doesn’t need shaping/positioning information. That's true, but the fonts that I am familiar w

Re: [XeTeX] Handling of combining and variant selector characters in math

2016-02-10 Thread David J. Perry
On 2/10/2016 5:34 PM, David Carlisle wrote: Note I was using Khaled's xits-math variant not the original stix version, xits-math has many improvements to the opentype internals. The VS1 combinations in xits-math work for example in firefox. David Thanks, David. I downloaded the XITS fonts today

[XeTeX] Command \providelength already defined

2016-02-10 Thread Shakthi Kannan
Hi, I am trying to use the "dialogue" package with XeTeX, and I hit the following error: === BEGIN === ... (/usr/share/texlive/texmf-dist/tex/latex/frankenstein/dialogue.sty (/usr/share/texlive/texmf-dist/tex/latex/frankenstein/blkcntrl.sty (/usr/share/texlive/texmf-dist/tex/latex/frankenstein/m

Re: [XeTeX] Command \providelength already defined

2016-02-10 Thread Will Robertson
On 11 Feb 2016, at 4:27 PM, Shakthi Kannan wrote: > > ! LaTeX Error: Command \providelength already defined. > Or name \end... illegal, see p.192 of the manual. How ironic… it should have been defined with \providecommand in both cases! (If they both behave identically, which I gue

Re: [XeTeX] Command \providelength already defined

2016-02-10 Thread Arthur Reutenauer
> Sure, just write > > \let\providelength\relax > > before the second package is loaded. Or just load dialogue before polyglossia. For what it's worth, none of these packages define \providelength themselves, they're defined in packages they include. Best, Arthur