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-rw-r--r--Master/texmf-dist/tex/context/base/mkiv/font-enh.lua200
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diff --git a/Master/texmf-dist/tex/context/base/mkiv/font-enh.lua b/Master/texmf-dist/tex/context/base/mkiv/font-enh.lua
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+++ b/Master/texmf-dist/tex/context/base/mkiv/font-enh.lua
@@ -0,0 +1,200 @@
+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
+
+registerafmfeature {
+ name = "unicoding",
+ description = "adapt unicode table",
+ initializers = {
+ base = initializeunicoding,
+ node = initializeunicoding,
+ },
+ -- manipulators = {
+ -- base = finalizeunicoding,
+ -- node = finalizeunicoding,
+ -- }
+}
+
+registerotffeature {
+ name = "unicoding",
+ description = "adapt unicode table",
+ initializers = {
+ base = initializeunicoding,
+ node = initializeunicoding,
+ },
+ -- manipulators = {
+ -- base = finalizeunicoding,
+ -- node = finalizeunicoding,
+ -- }
+}