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if not modules then modules = { } end modules ['font-imp-scripts'] = {
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 getrange = characters.getrange
local settings_to_hash = utilities.parsers.settings_to_hash
if not context then return end
-- the defaults are not yet ok
local next, type, tonumber = next, type, tonumber
local gmatch = string.gmatch
local max = math.max
local fonts = fonts
local utilities = utilities
local helpers = fonts.helpers
local charcommand = helpers.commands.char
local downcommand = helpers.commands.down
local upcommand = helpers.commands.up
local handlers = fonts.handlers
local otf = handlers.otf
local afm = handlers.afm
local registerotffeature = otf.features.register
local registerafmfeature = afm.features.register
local settings_to_hash = utilities.parsers.settings_to_hash
local sortedhash = table.sortedhash
local handlers = fonts.handlers
local sup = nil
local sub = nil
local function initialize(tfmdata,key,value)
--
if not sup then
sup = { }
sub = { }
for unicode, data in next, characters.data do
local specials = data.specials
if specials then
local what = specials[1]
if what == "super" then
sup[unicode] = specials[2]
elseif what == "sub" then
sub[unicode] = specials[2]
end
end
end
end
--
local spec
if value == true then
spec = { factor = 3/5, up = 5/4, down = 1/4 }
elseif type(value) == "number" then
spec = { factor = value, up = 5/4, down = 1/4 }
else
spec = settings_to_hash(value)
end
local factor = tonumber(spec.factor) or 3/5
local up = tonumber(spec.up) or 5/4
local down = tonumber(spec.down) or 1/4
--
local characters = tfmdata.characters
local parameters = tfmdata.parameters
local up = parameters.xheight * up
local down = -parameters.xheight * down
-- disable sups/subs
local function add(unicode,other,go_up)
local old = characters[other]
if old then
local shift = go_up and up or down
local width = (old.width or 0) * factor
local height = (old.height or 0) * factor + shift
local depth = go_up and 0 or max((old.depth or 0) * factor + down,0)
characters[unicode] = {
width = width,
height = height,
depth = depth,
commands = { { "offset", 0, shift, other, factor, factor } },
-- yoffset = shift,
-- xscale = factor,
-- yscale = factor,
-- commands = { { "slot", 0, other } },
}
end
end
for unicode, other in sortedhash(sup) do
add(unicode,other,true)
end
for unicode, other in sortedhash(sub) do
add(unicode,other,false)
end
end
local specification = {
name = "scripts",
description = "add superiors and inferiors",
manipulators = {
base = initialize,
node = initialize,
}
}
registerotffeature(specification)
registerafmfeature(specification)
-- a different kind of scripts support
local function initialize(tfmdata,key,value)
if value then
local detail = type(value) == "string" and settings_to_hash(value) or { }
local orientation = tonumber(detail.orientation) or 0
if orientation == 1 or orientation == 3 then
local characters = tfmdata.characters
local parameters = tfmdata.parameters
local emwidth = parameters.quad
local exheight = parameters.xheight
local ranges = detail.ranges
local downshift = exheight * (tonumber(detail.down) or 0)
local rightshift = exheight * (tonumber(detail.right) or 0)
local orientate
if orientation == 1 then
orientate = function(character)
local width = character.width or 0
local height = character.height or 0
local depth = character.depth or 0
character.width = height + depth + rightshift + rightshift
character.height = width - downshift
character.depth = shift
character.xoffset = depth + rightshift
character.yoffset = width - downshift
character.orientation = orientation
end
else
orientate = function(character)
local width = character.width or 0
local height = character.height or 0
local depth = character.depth or 0
character.width = height + depth + rightshift + rightshift
character.height = width - downshift
character.depth = shift
character.xoffset = height + rightshift
character.yoffset = - downshift
character.orientation = orientation
end
end
if ranges then
for s in gmatch(ranges,"[^, ]+") do
local start, stop, description, gaps = getrange(s,true)
if start and stop then
for unicode=start,stop do
local character = characters[unicode]
if character then
orientate(character)
end
end
end
end
else
for unicode, character in next, characters do
orientate(character)
end
end
end
end
end
local specification = {
name = "vertical",
description = "vertical",
manipulators = {
base = initialize,
node = initialize,
}
}
registerotffeature(specification)
registerafmfeature(specification)
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