Dear Hans & Wolfgang,
I resolved some of the minor issues. But the main question still stands.
Is it possible to add an OTF feature to the math font? In the very simple
case, I want to change any sequence like "1.2" to "1/2". My feature (see
below) works for text fonts but not in math mode.
Thanks,
MHB
On Tue, Aug 2, 2016 at 3:54 PM, Mohammad Hossein Bateni <bat...@gmail.com>
wrote:
> Could the problem be because math fonts use mode=base instead of
> mode=node? Or is it because in math fonts, the digits and/or full-stop
> have different codes?
> —MHB
>
> On Mon, Aug 1, 2016 at 9:46 AM, Mohammad Hossein Bateni <bat...@gmail.com>
> wrote:
>
>> Dear list,
>>
>> I want to add a customized font feature to the math font, to
>> automatically change the decimal point (unicode 0x2E) to the Arabic/Farsi
>> version (unicode 0x66B). This will go well with the mapping from Latin
>> digits to Farsi digits (done in a sample with mathdigits fallback).
>>
>> For instance, I want to code in $123.45$ and get a result like ۱۲۳٫۴۵.
>> However, I do not want to simply map 0x2E to 0x66B, because then "full
>> stop" outside a number will also change. In particular, I'd like to have
>> the mapping only when full-stop is preceded and succeeded by a digit. This
>> will, among other things, leave the end-of-equation periods unchanged.
>>
>> Here is how I tried to achieve it.
>>
>>
>> \startluacode
>> digits = { 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39 }
>> -- 0x66B instead of 0x2F gives an error!
>> replacements = { [0x002E] = { 0x2F } }
>> fonts.handlers.otf.addfeature {
>> name = "mpf",
>> type = "chainsubstitution",
>> lookups = { {
>> type = "multiple",
>> data = replacements,
>> } },
>> data = {
>> rules = {
>> {
>> current = { { 0x002E } },
>> after = { digits },
>> before = { digits },
>> lookups = { 1 },
>> }
>> }
>> }
>> }
>> \stopluacode
>>
>> \definefontfeature[mathperiod][mpf=yes]
>>
>> \resetfontfallback [mathdigits]
>> %\definefontfallback[mathdigits][dejavusansmono][
>> digitsextendedarabicindic][check=yes,force=yes,offset=digitsnormal]
>>
>> \definefontsynonym [MathRoman][name:modern][
>> features={math\mathsizesuffix,mathperiod},goodies=lm-math,
>> fallbacks=mathdigits]
>>
>> \starttext
>> $123.45.$
>>
>> 123.45.
>>
>> \addff{mathperiod}
>> 123.45.
>> \stoptext
>>
>
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