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if not modules then modules = { } end modules ['font-imp-tex'] = {
version = 1.001,
comment = "companion to font-ini.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local next = next
local fonts = fonts
local otf = fonts.handlers.otf
local registerotffeature = otf.features.register
local addotffeature = otf.addfeature
-- We provide a few old and obsolete compatibility input features. We need numbers
-- for some fonts so no names here. Do we also need them for afm fonts?
local tlig = {
type = "ligature",
order = { "tlig" },
prepend = true,
data = {
[0x2013] = { 0x002D, 0x002D },
[0x2014] = { 0x002D, 0x002D, 0x002D },
},
}
local tquo = {
type = "ligature",
order = { "tquo" },
prepend = true,
data = {
[0x201C] = { 0x0060, 0x0060 },
[0x201D] = { 0x0027, 0x0027 },
[0x201E] = { 0x002C, 0x002C },
},
}
local trep = {
type = "substitution",
order = { "trep" },
prepend = true,
data = {
-- [0x0022] = 0x201D,
[0x0027] = 0x2019,
-- [0x0060] = 0x2018,
},
}
addotffeature("trep",trep) -- last
addotffeature("tlig",tlig)
addotffeature("tquo",tquo) -- first
registerotffeature { name = "tlig", description = "tex ligatures" }
registerotffeature { name = "tquo", description = "tex quotes" }
registerotffeature { name = "trep", description = "tex replacements" }
-- some day this will be moved to font-imp-scripts.lua
-- anum
local anum_arabic = {
[0x0030] = 0x0660,
[0x0031] = 0x0661,
[0x0032] = 0x0662,
[0x0033] = 0x0663,
[0x0034] = 0x0664,
[0x0035] = 0x0665,
[0x0036] = 0x0666,
[0x0037] = 0x0667,
[0x0038] = 0x0668,
[0x0039] = 0x0669,
}
local anum_persian = {
[0x0030] = 0x06F0,
[0x0031] = 0x06F1,
[0x0032] = 0x06F2,
[0x0033] = 0x06F3,
[0x0034] = 0x06F4,
[0x0035] = 0x06F5,
[0x0036] = 0x06F6,
[0x0037] = 0x06F7,
[0x0038] = 0x06F8,
[0x0039] = 0x06F9,
}
local function valid(data)
local features = data.resources.features
if features then
for k, v in next, features do
for k, v in next, v do
if v.arab then
return true
end
end
end
end
end
local specification = {
{
type = "substitution",
features = { arab = { urd = true, dflt = true } },
order = { "anum" },
data = anum_arabic,
valid = valid,
},
{
type = "substitution",
features = { arab = { urd = true } },
order = { "anum" },
data = anum_persian,
valid = valid,
},
}
addotffeature("anum",specification)
registerotffeature {
-- this makes it a known feature (in tables)
name = "anum",
description = "arabic digits",
}
-- -- example:
--
-- fonts.handlers.otf.addfeature {
-- name = "hangulfix",
-- type = "substitution",
-- features = { ["hang"] = { ["*"] = true } },
-- data = {
-- [0x1160] = 0x119E,
-- },
-- order = { "hangulfix" },
-- flags = { },
-- prepend = true,
-- })
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