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if not modules then modules = { } end modules ['font-imp-properties'] = {
version = 1.001,
comment = "companion to font-ini.mkiv and hand-ini.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
if not context then return end
local next, type, tonumber, select = next, type, tonumber, select
local byte, find, formatters = string.byte, string.find, string.formatters
local utfchar = utf.char
local sortedhash, sortedkeys, sort = table.sortedhash, table.sortedkeys, table.sort
local insert = table.insert
local context = context
local fonts = fonts
local utilities = utilities
local helpers = fonts.helpers
local handlers = fonts.handlers
local hashes = fonts.hashes
local otf = handlers.otf
local afm = handlers.afm
local registerotffeature = otf.features.register
local registerafmfeature = afm.features.register
local fontdata = hashes.identifiers
local fontproperties = hashes.properties
local constructors = fonts.constructors
local getprivate = constructors.getprivate
local allocate = utilities.storage.allocate
local setmetatableindex = table.setmetatableindex
local implement = interfaces.implement
do
local P, lpegpatterns, lpegmatch = lpeg.P, lpeg.patterns, lpeg.match
local amount, stretch, shrink, extra
local factor = lpegpatterns.unsigned
local space = lpegpatterns.space
local pattern = (
(factor / function(n) amount = tonumber(n) or amount end)
+ (P("+") + P("plus" )) * space^0 * (factor / function(n) stretch = tonumber(n) or stretch end)
+ (P("-") + P("minus")) * space^0 * (factor / function(n) shrink = tonumber(n) or shrink end)
+ ( P("extra")) * space^0 * (factor / function(n) extra = tonumber(n) or extra end)
+ space^1
)^1
local function initialize(tfmdata,key,value)
local characters = tfmdata.characters
local parameters = tfmdata.parameters
if type(value) == "string" then
local emwidth = parameters.quad
amount, stretch, shrink, extra = 0, 0, 0, false
lpegmatch(pattern,value)
if not extra then
if shrink ~= 0 then
extra = shrink
elseif stretch ~= 0 then
extra = stretch
else
extra = amount
end
end
parameters.space = amount * emwidth
parameters.space_stretch = stretch * emwidth
parameters.space_shrink = shrink * emwidth
parameters.extra_space = extra * emwidth
end
end
-- 1.1 + 1.2 - 1.3 minus 1.4 plus 1.1 extra 1.4 -- last one wins
registerotffeature {
name = "spacing",
description = "space settings",
manipulators = {
base = initialize,
node = initialize,
}
}
end
do
local function initialize(tfmdata,value)
local properties = tfmdata.properties
if properties then
properties.identity = value == "vertical" and "vertical" or "horizontal"
end
end
registerotffeature {
name = "identity",
description = "set font identity",
initializers = {
base = initialize,
node = initialize,
}
}
local function initialize(tfmdata,value)
local properties = tfmdata.properties
if properties then
properties.writingmode = value == "vertical" and "vertical" or "horizontal"
end
end
registerotffeature {
name = "writingmode",
description = "set font direction",
initializers = {
base = initialize,
node = initialize,
}
}
end
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