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if not modules then modules = { } end modules ['font-imp-digits'] = {
version = 1.001,
comment = "companion to font-ini.mkiv",
author = "Hans Hagen, PRAGMA ADE",
copyright = "ConTeXt Development Team",
license = "see context related readme files"
}
if not context then return end
local equaldigits = { }
-- for i=48,57 do
-- equaldigits[i] = fonts.helpers.newprivateslot(tonumber(i)..".equaldigits")
-- end
local function initialize(tfmdata,value)
if value then
local characters = tfmdata.characters
local wd, ht, dp = 0, 0, 0
for i=48,57 do
if not equaldigits[i] then
equaldigits[i] = fonts.helpers.newprivateslot(tonumber(i)..".equaldigits")
end
local c = characters[i]
local w = c.width or 0
local h = c.height or 0
local d = c.depth or 0
if w > wd then wd = w end
if h > ht then ht = h end
if d > dp then dp = d end
end
for i=48,57 do
-- fonts.helpers.addprivate(tfmdata,tonumber(i)..".equaldigits")
local u = equaldigits[i]
local c = characters[i]
characters[u] = table.setmetatableindex( {
height = ht,
depth = dp,
width = wd,
xoffset = (wd - (c.width or 0)) / 2,
}, c)
end
end
end
fonts.handlers.otf.features.register {
name = "equaldigits",
description = "equaldigits",
manipulators = {
base = initialize,
node = initialize,
}
}
fonts.handlers.otf.addfeature {
-- name = "tnum", -- let's not waste that one
name = "tabledigits",
type = "substitution",
nocheck = true,
data = equaldigits,
}
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