userdata = userdata or {}

userdata.adobesource = userdata.adobesource or {}

userdata.adobesource.getfontname = function(style, typescript, italic, bold)
    local prefixes = {
        serif = "file:SourceSerif4",
        sans  = "file:SourceSans3",
        mono  = "file:SourceCodePro",
    }
    local designsizes = {
        caption = "Caption",
        smtext  = "SmText",
        subhead = "Subhead",
        display = "Display",
    }
    local boldalternative = {
        extralight = "regular",
        light      = "semibold",
        regular    = "bold",
        medium     = "bold",
        semibold   = "black",
        bold       = "black",
        black      = "black"
    }
    local i = string.gmatch(typescript, "[^-]*")
    i() -- Skip "adobesource"
    local explicitdesignsize
    local nodesignsize
    local weight
    local token = i()
    if designsizes[token] then
        explicitdesignsize = designsizes[token]
        weight = i()
    elseif token == "nodesignsize" then
        nodesignsize = true
        weight = i()
    else
        weight = token
    end
    weight = weight or "regular"
    if style ~= "mono" and weight == "medium" then
        weight = "regular"
    end
    if bold then
        weight = boldalternative[weight]
    end
    local name
    if style == "serif" and not (explicitdesignsize or nodesignsize) then
        name = "SourceSerif4"
    else
        name = prefixes[style]
    end
    if explicitdesignsize then
        name = name .. explicitdesignsize
    end
    name = name .. "-"
    if italic then
        if weight == "regular" then
            return name .. "It"
        else
            return name .. weight .. "It"
        end
    else
        return name .. weight
    end
end