Re: [NTG-context] Kerning between primes and left parenthesis (again)

31 Jul 2017

      On Thu, Jul 20, 2017 at 2:53 PM, Hans Hagen  wrote:
...
On 7/20/2017 7:18 AM, Mikael P. Sundqvist wrote:
...
Den 12 juli 2017 10:17 fm skrev "Mikael P. Sundqvist" mailto:mickep@gmail.com>:
Dear Hans,
now, in luatex 1.05, that the primes are "constructed" in new manner,
    I wonder if there is a way to specify in a goodie file the kerning
    between characters, in particular primes and the left parenthesis?
I tried
kernpairs = {
                [0x2032] = {[0x0028] = -1000, }, -- prime and (
             },
but that does not seem to have any effect.
The pre-1.05 modification
dimensions = {
                 default = {
                     [0x2044] = { xoffset = 275, width = 600 },
                     [0x2032] = { xoffset = 50, width = 290 }, -- prime
                     [0x2033] = { xoffset = 50, width = 690 }, -- double
    prime
                     [0x2034] = { xoffset = 50, width = 1090}, -- triple
    prime
                     [0x2057] = { xoffset = 50, width = 1490}, --
    quadruple prime
             },
         },
(which is a non-optimal way of solving this issue since it has side
    effects) does not change anything anymore.
So, is there now a way to do this cleanly now that the mechanism is
    changed?
/Mikael
Hi,
should I interpret the silence that this is currently not possible, or
that you, Hans, is completely fed up with this subject? :-)
you rule out the possibility that i have other things to do
anyway, use
0xFE932
etc instead as primes get remapped
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                                          Hans Hagen | PRAGMA ADE
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I'm sorry but I cannot get it to work.

%%% my local lucida-opentype-math.lfg, located in the same directory
as the tex file (and loaded)
----- kern_250 = { bottomright = { { kern = -250 } }, force = true }

local function FixRadicalDisplayStyleVerticalGap(value,target,original)
    local o = original.mathparameters.RadicalVerticalGap -- 50
    return 2 * o * target.parameters.factor
end

return {
    name = "lucida-opentype-math",
    version = "1.00",
    comment = "Goodies that complement lucida opentype.",
    author = "Hans Hagen",
    copyright = "ConTeXt development team",
    mathematics = {
        parameters = {
            RadicalDisplayStyleVerticalGap = FixRadicalDisplayStyleVerticalGap,
        },
        kernpairs = {
           [0x1D44E] = {[0x1D44F] = 1000,}, -- 𝑎𝑏 demo
           [0xFE932] = {[0x0028] = 1000,} -- remapped prime and (
        },
}
}
%%%

%%% the tex file
\setupbodyfont[lucidaot]
\setupmathematics[kernpairs=yes]

\starttext
$f'(x)ab$
\stoptext
%%%

The result is attached. It works ok for the pair ab, but not for prime
and (. Is the ( also remapped (while greping for it in the source, I
could not find any clue).

Maybe it is better to ping the maintainers of the font?

/Mikael