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if not modules then modules = { } end modules ['font-enh'] = {
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 trace_unicoding = false
trackers.register("fonts.defining", function(v) trace_unicoding = v end)
trackers.register("fonts.unicoding", function(v) trace_unicoding = v end)
local report_unicoding = logs.reporter("fonts","unicoding")
local fonts = fonts
local constructors = fonts.constructors
local tfmfeatures = constructors.newfeatures("tfm")
local registertfmfeature = tfmfeatures.register
local afmfeatures = fonts.constructors.newfeatures("afm")
local registerafmfeature = afmfeatures.register
local otffeatures = fonts.constructors.newfeatures("otf")
local registerotffeature = otffeatures.register
-- -- these will become goodies (when needed at all)
--
-- local fontencodings = fonts.encodings
-- fontencodings.remappings = fontencodings.remappings or { }
--
-- local function reencode(tfmdata,encoding)
-- if encoding and fontencodings.known[encoding] then
-- local data = fontencodings.load(encoding)
-- if data then
-- tfmdata.properties.encoding = encoding
-- local characters = tfmdata.characters
-- local original = { }
-- local vector = data.vector
-- for unicode, character in next, characters do
-- character.name = vector[unicode]
-- character.index = unicode, character
-- original[unicode] = character
-- end
-- for newcode, oldcode in next, data.unicodes do
-- if newcode ~= oldcode then
-- if trace_unicoding then
-- report_unicoding("reencoding %U to %U",oldcode,newcode)
-- end
-- characters[newcode] = original[oldcode]
-- end
-- end
-- end
-- end
-- end
--
-- registertfmfeature {
-- name = "reencode",
-- description = "reencode",
-- manipulators = {
-- base = reencode,
-- node = reencode,
-- }
-- }
--
-- local function remap(tfmdata,remapping)
-- local vector = remapping and fontencodings.remappings[remapping]
-- if vector then
-- local characters, original = tfmdata.characters, { }
-- for k, v in next, characters do
-- original[k], characters[k] = v, nil
-- end
-- for k,v in next, vector do
-- if k ~= v then
-- if trace_unicoding then
-- report_unicoding("remapping %U to %U",k,v)
-- end
-- local c = original[k]
-- characters[v] = c
-- c.index = k
-- end
-- end
-- local properties = tfmdata.properties
-- if not properties then
-- properties = { }
-- tfmdata.properties = properties
-- else
-- properties.encodingbytes = 2
-- properties.format = properties.format or 'type1'
-- end
-- end
-- end
--
-- registertfmfeature {
-- name = "remap",
-- description = "remap",
-- manipulators = {
-- base = remap,
-- node = remap,
-- }
-- }
-- \definefontfeature[dingbats][goodies=dingbats,unicoding=yes]
-- we only add and don't replace
-- we could also add kerns but we asssume symbols
-- todo: complain if not basemode
-- remapping = {
-- tounicode = true,
-- unicodes = {
-- a1 = 0x2701,
----- tosixteen = fonts.mappings.tounicode16
local function initializeunicoding(tfmdata)
local goodies = tfmdata.goodies
local newcoding = nil
-- local tounicode = false
for i=1,#goodies do
local remapping = goodies[i].remapping
if remapping and remapping.unicodes then
newcoding = remapping.unicodes -- names to unicodes
-- tounicode = remapping.tounicode -- not used
end
end
if newcoding then
local characters = tfmdata.characters
local descriptions = tfmdata.descriptions
local oldcoding = tfmdata.resources.unicodes
-- local tounicodes = tfmdata.resources.tounicode -- index to unicode
local originals = { }
for name, newcode in next, newcoding do
local oldcode = oldcoding[name]
if characters[newcode] and not originals[newcode] then
originals[newcode] = {
character = characters [newcode],
description = descriptions[newcode],
}
end
if oldcode then
local original = originals[oldcode]
if original then
characters [newcode] = original.character
descriptions[newcode] = original.description
else
characters [newcode] = characters [oldcode]
descriptions[newcode] = descriptions[oldcode]
end
else
oldcoding[name] = newcode
end
-- if tounicode then
-- local description = descriptions[newcode]
-- if description then
-- local index = description.index
-- if not tounicodes[index] then
-- tounicodes[index] = tosixteen(newcode) -- shared (we could have a metatable)
-- end
-- end
-- end
if trace_unicoding then
if oldcode then
report_unicoding("aliasing glyph %a from %U to %U",name,oldcode,newcode)
else
report_unicoding("aliasing glyph %a to %U",name,newcode)
end
end
end
end
end
local unicoding_specification = {
name = "unicoding",
description = "adapt unicode table",
initializers = {
base = initializeunicoding,
node = initializeunicoding,
},
-- manipulators = {
-- base = finalizeunicoding,
-- node = finalizeunicoding,
-- }
}
registerotffeature(unicoding_specification)
registerafmfeature(unicoding_specification)
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