On 1 Dec 2016, at 19:05, Doug Hill <cocoa...@breaqz.com> wrote: > > Just made another breakthrough. I finally figured out why we have the > vertically centerd colon (I’ll now call it VCC) by default but has > requirements of numbers on either side of the colon. > The SF font setting is “Contextual Alternatives” (I’ll now call it CA). When > CA is on, it will use the logic of numbers on either side of a colon to get > VCC. Turning off CA turns off this logic and no VCC. But even if CA is on, > and you have a character stream that isn’t <number>:<number>, you can turn on > VCC explicitly with it’s own selector to get that behavior. > > Other than VCC I’m not sure what other contextual alternatives there are. > Fractions didn’t seem to do anything differently.
I think we’ve headed off topic somewhat, so this is likely my final word on the subject. Contextual alternates’ usual abbreviation is “calt” (which is its OpenType tag). It might also, at this point, be worth pointing you at the OpenType specification https://www.microsoft.com/en-us/Typography/OpenTypeSpecification.aspx and in particular the registered features page: https://www.microsoft.com/typography/otspec/featurelist.htm The pages on advanced layout may also be informative. Kind regards, Alastair. -- http://alastairs-place.net _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
