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if not modules then modules = { } end modules ['good-ini'] = {
version = 1.000,
comment = "companion to font-lib.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
-- depends on ctx
local type, next = type, next
local gmatch = string.gmatch
local fonts = fonts
local trace_goodies = false trackers.register("fonts.goodies", function(v) trace_goodies = v end)
local report_goodies = logs.reporter("fonts","goodies")
local allocate = utilities.storage.allocate
local implement = interfaces.implement
local findfile = resolvers.findfile
local formatters = string.formatters
local otf = fonts.handlers.otf
local afm = fonts.handlers.afm
local tfm = fonts.handlers.tfm
local registerotffeature = otf.features.register
local registerafmfeature = afm.features.register
local registertfmfeature = tfm.features.register
local addotffeature = otf.enhancers.addfeature
local fontgoodies = fonts.goodies or { }
fonts.goodies = fontgoodies
local data = fontgoodies.data or { }
fontgoodies.data = data -- no allocate as we want to see what is there
local list = fontgoodies.list or { }
fontgoodies.list = list -- no allocate as we want to see what is there
fontgoodies.suffixes = { "lfg", "lua" } -- lfg is context specific and should not be used elsewhere
function fontgoodies.report(what,trace,goodies)
if trace_goodies or trace then
local whatever = goodies[what]
if whatever then
report_goodies("goodie %a found in %a",what,goodies.name)
end
end
end
local function locate(filename)
local suffixes = fontgoodies.suffixes
for i=1,#suffixes do
local suffix = suffixes[i]
local fullname = findfile(file.addsuffix(filename,suffix))
if fullname and fullname ~= "" then
return fullname
end
end
end
local function loadgoodies(filename) -- maybe a merge is better
local goodies = data[filename] -- we assume no suffix is given
if goodies ~= nil then
-- found or tagged unfound
elseif type(filename) == "string" then
local fullname = locate(filename)
if not fullname or fullname == "" then
report_goodies("goodie file %a is not found (suffixes: % t)",filename,fontgoodies.suffixes)
data[filename] = false -- signal for not found
else
goodies = dofile(fullname) or false
if not goodies then
report_goodies("goodie file %a is invalid",fullname)
return nil
elseif trace_goodies then
report_goodies("goodie file %a is loaded",fullname)
end
goodies.name = goodies.name or "no name"
for name, fnc in next, list do
if trace_goodies then
report_goodies("handling goodie %a",name)
end
fnc(goodies)
end
goodies.initialized = true
data[filename] = goodies
end
end
return goodies
end
function fontgoodies.register(name,fnc) -- will be a proper sequencer
list[name] = fnc
end
fontgoodies.load = loadgoodies
if implement then
implement {
name = "loadfontgoodies",
actions = loadgoodies,
arguments = "string",
overload = true, -- for now, permits new font loader
}
end
-- register goodies file
local function setgoodies(tfmdata,value)
local goodies = tfmdata.goodies
if not goodies then -- actually an error
goodies = { }
tfmdata.goodies = goodies
end
for filename in gmatch(value,"[^, ]+") do
-- we need to check for duplicates
local ok = loadgoodies(filename)
if ok then
if trace_goodies then
report_goodies("assigning goodie %a",filename)
end
goodies[#goodies+1] = ok
end
end
end
-- featuresets
local function flattenedfeatures(t,tt)
-- first set value dominates
local tt = tt or { }
for i=1,#t do
local ti = t[i]
if type(ti) == "table" then
flattenedfeatures(ti,tt)
elseif tt[ti] == nil then
tt[ti] = true
end
end
for k, v in next, t do
if type(k) ~= "number" then -- not tonumber(k)
if type(v) == "table" then
flattenedfeatures(v,tt)
elseif tt[k] == nil then
tt[k] = v
end
end
end
return tt
end
-- fonts.features.flattened = flattenedfeatures
local function prepare_features(goodies,name,set)
if set then
local ff = flattenedfeatures(set)
local fullname = goodies.name .. "::" .. name
local n, s = fonts.specifiers.presetcontext(fullname,"",ff)
goodies.featuresets[name] = s -- set
if trace_goodies then
report_goodies("feature set %a gets number %a and name %a",name,n,fullname)
end
return n
end
end
fontgoodies.prepare_features = prepare_features
local function initialize(goodies)
local featuresets = goodies.featuresets
if featuresets then
if trace_goodies then
report_goodies("checking featuresets in %a",goodies.name)
end
for name, set in next, featuresets do
prepare_features(goodies,name,set)
end
end
end
fontgoodies.register("featureset",initialize)
local function setfeatureset(tfmdata,set,features)
local goodies = tfmdata.goodies -- shared ?
if goodies then
local properties = tfmdata.properties
local what
for i=1,#goodies do
-- last one wins
local g = goodies[i]
what = g.featuresets and g.featuresets[set] or what
end
if what then
for feature, value in next, what do
if features[feature] == nil then
features[feature] = value
end
end
properties.mode = what.mode or properties.mode
end
end
end
-- postprocessors (we could hash processor and share code)
function fontgoodies.registerpostprocessor(tfmdata,f,prepend)
local postprocessors = tfmdata.postprocessors
if not postprocessors then
tfmdata.postprocessors = { f }
elseif prepend then
table.insert(postprocessors,f,1)
else
table.insert(postprocessors,f)
end
end
local function setpostprocessor(tfmdata,processor)
local goodies = tfmdata.goodies
if goodies and type(processor) == "string" then
local found = { }
local asked = utilities.parsers.settings_to_array(processor)
for i=1,#goodies do
local g = goodies[i]
local p = g.postprocessors
if p then
for i=1,#asked do
local a = asked[i]
local f = p[a]
if type(f) == "function" then
found[a] = f
end
end
end
end
local postprocessors = tfmdata.postprocessors or { }
for i=1,#asked do
local a = asked[i]
local f = found[a]
if f then
postprocessors[#postprocessors+1] = f
end
end
if #postprocessors > 0 then
tfmdata.postprocessors = postprocessors
end
end
end
local function setextrafeatures(tfmdata)
local goodies = tfmdata.goodies
if goodies then
for i=1,#goodies do
local g = goodies[i]
local f = g.features
if f then
for feature, specification in next, f do
addotffeature(tfmdata.shared.rawdata,feature,specification)
registerotffeature {
name = feature,
description = formatters["extra: %s"](feature)
}
end
end
end
end
end
local function setextensions(tfmdata)
local goodies = tfmdata.goodies
if goodies then
for i=1,#goodies do
local g = goodies[i]
local e = g.extensions
if e then
local goodie = g.name or "unknown"
for i=1,#e do
local name = "extension-" .. i
-- report_goodies("adding extension %s from %s",name,goodie)
otf.enhancers.addfeature(tfmdata.shared.rawdata,name,e[i])
end
end
end
end
end
-- installation
local goodies_specification = {
name = "goodies",
description = "goodies on top of built in features",
initializers = {
position = 1,
base = setgoodies,
node = setgoodies,
}
}
registerotffeature(goodies_specification)
registerafmfeature(goodies_specification)
registertfmfeature(goodies_specification)
-- maybe more of the following could be for type one too
registerotffeature {
name = "extrafeatures",
description = "extra features",
default = true,
initializers = {
position = 2,
base = setextrafeatures,
node = setextrafeatures,
}
}
registerotffeature {
name = "extensions",
description = "extensions to features",
default = true,
initializers = {
position = 2,
base = setextensions,
node = setextensions,
}
}
registerotffeature {
name = "featureset",
description = "goodie feature set",
initializers = {
position = 3,
base = setfeatureset,
node = setfeatureset,
}
}
registerotffeature {
name = "postprocessor",
description = "goodie postprocessor",
initializers = {
base = setpostprocessor,
node = setpostprocessor,
}
}
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