Re: Unicode normalization and Hebrew in ConTeXt

[Hans Hagen <j.hagen@xs4all.nl>]

On 4/28/2020 1:59 PM, Joey McCollum wrote:
> \definefontfeature[f:pointedhebrew][default][
>      ccmp=yes,
>      mark=yes,
>      script=hebr
> ]
> \definefontfamily[hebrew] [rm] [SBL Hebrew] [features=f:pointedhebrew]
> %Set the body font:
> \setupbodyfont[hebrew]
> %Set up right-to-left alignment:
> \setupalign[r2l]
> \starttext
>      %Characters after normalization, in Unicode canonical order (bet + 
> segol + dagesh + final nun):
>      בֶּן
> 
>      %A word with characters in typographically recommended order (bet + 
> dagesh + segol + final nun):
>      בֶּן
> \stoptext

\startluacode
     fonts.handlers.otf.addfeature {
         name    = "normalizehebrew",
         type    = "chainsubstitution",
         prepend = 1,
         lookups = {
             {
                 type = "multiple",
                 data = {
                     [0x5B6] = { 0x5BC, 0x5B6 },
                 },
             },
         },
         data = {
             rules = {
                 {
                     current = { { 0x5B6 }, { 0x5BC } },
                     lookups = { 1, 0 },
                 },
             },
         },
     }
\stopluacode

\definefontfeature
   [f:pointedhebrew]
   [hebrew]
   [normalizehebrew=yes]

\definefontfamily[hebrew] [rm] [SBL Hebrew] [features=f:pointedhebrew]

\setupbodyfont[hebrew]

\setupalign[r2l]

\starttext
     בֶּן \quad בֶּן \par
\stoptext

How many such reorderings are there? (I saw some document about that 
font and it sounds like a bit messy wrt all these input variants.)

(there are several mechanisms in context to deal with such issues, it's 
all about getting specs from users i.e. tex is all about control so in 
principle it should be doable)

Hans

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                                           Hans Hagen | PRAGMA ADE
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