font-lua.lua / last modification: 2020-01-30 14:16
if not modules then modules = { } end modules ['font-lua'] = {
    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 trace_defining = false  trackers.register("fonts.defining", function(v) trace_defining = v end)

local report_lua     = logs.reporter("fonts","lua loading")

local fonts          = fonts
local readers        = fonts.readers
fonts.formats.lua    = "lua"

-- we could add support for features here

local function check_lua(specification,fullname)
    -- standard tex file lookup
    local fullname = resolvers.findfile(fullname) or ""
    if fullname ~= "" then
        local loader = loadfile(fullname)
        loader = loader and loader()
        return loader and loader(specification)
    end
end

readers.check_lua = check_lua

function readers.lua(specification)
    local original = specification.specification
    if trace_defining then
        report_lua("using lua reader for %a",original)
    end
    local fullname = specification.filename or ""
    if fullname == "" then
        local forced = specification.forced or ""
        if forced ~= "" then
            fullname = specification.name .. "." .. forced
        else
            fullname = specification.name
        end
    end
    return check_lua(specification,fullname)
end