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if not modules then modules = { } end modules ['font-oti'] = {
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 lower = string.lower
local fonts = fonts
local constructors = fonts.constructors
local otf = constructors.handlers.otf
local otffeatures = constructors.features.otf
local registerotffeature = otffeatures.register
local otftables = otf.tables or { }
otf.tables = otftables
local allocate = utilities.storage.allocate
registerotffeature {
name = "features",
description = "initialization of feature handler",
default = true,
}
-- these are later hooked into node and base initializaters
local function setmode(tfmdata,value)
if value then
tfmdata.properties.mode = lower(value)
end
end
otf.modeinitializer = setmode
local function setlanguage(tfmdata,value)
if value then
local cleanvalue = lower(value)
local languages = otftables and otftables.languages
local properties = tfmdata.properties
if not languages then
properties.language = cleanvalue
elseif languages[value] then
properties.language = cleanvalue
else
properties.language = "dflt"
end
end
end
local function setscript(tfmdata,value)
if value then
local cleanvalue = lower(value)
local scripts = otftables and otftables.scripts
local properties = tfmdata.properties
if not scripts then
properties.script = cleanvalue
elseif scripts[value] then
properties.script = cleanvalue
else
properties.script = "dflt"
end
end
end
registerotffeature {
name = "mode",
description = "mode",
initializers = {
base = setmode,
node = setmode,
}
}
registerotffeature {
name = "language",
description = "language",
initializers = {
base = setlanguage,
node = setlanguage,
}
}
registerotffeature {
name = "script",
description = "script",
initializers = {
base = setscript,
node = setscript,
}
}
-- here (as also in generic
otftables.featuretypes = allocate {
gpos_single = "position",
gpos_pair = "position",
gpos_cursive = "position",
gpos_mark2base = "position",
gpos_mark2ligature = "position",
gpos_mark2mark = "position",
gpos_context = "position",
gpos_contextchain = "position",
gsub_single = "substitution",
gsub_multiple = "substitution",
gsub_alternate = "substitution",
gsub_ligature = "substitution",
gsub_context = "substitution",
gsub_contextchain = "substitution",
gsub_reversecontextchain = "substitution",
gsub_reversesub = "substitution",
}
function otffeatures.checkeddefaultscript(featuretype,autoscript,scripts)
if featuretype == "position" then
local default = scripts.dflt
if default then
if autoscript == "position" or autoscript == true then
return default
else
report_otf("script feature %s not applied, enable default positioning")
end
else
-- no positioning at all
end
elseif featuretype == "substitution" then
local default = scripts.dflt
if default then
if autoscript == "substitution" or autoscript == true then
return default
end
end
end
end
function otffeatures.checkeddefaultlanguage(featuretype,autolanguage,languages)
if featuretype == "position" then
local default = languages.dflt
if default then
if autolanguage == "position" or autolanguage == true then
return default
else
report_otf("language feature %s not applied, enable default positioning")
end
else
-- no positioning at all
end
elseif featuretype == "substitution" then
local default = languages.dflt
if default then
if autolanguage == "substitution" or autolanguage == true then
return default
end
end
end
end
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