Allow LUA widget translations

[DavBfr]

Allows #221

Summary of changes:
Add the ability for Lua Widgets to display proper text in the Settings Menu as well as Display translated strings for Settings and The Widget name itself.

Backward compatibility is preserved as it adds a widget callback translate(text, lang) that is called if defined.

Example:

local name = "MyWidget"

local options = {
    {"FirstChannel", VALUE, 1},
    {"FillBackground", BOOL, 0},
    {"BgColor", COLOR, COLOR_THEME_SECONDARY3},
    {"TextColor", COLOR, COLOR_THEME_PRIMARY1},
    {"BarColor", COLOR, COLOR_THEME_SECONDARY1}
}

local function update(widget, options)
    widget.options = options
end

local function create(zone, options)
    local widget = {zone = zone, options = options}
    return widget
end

local function refresh(widget, event, touch)
end

local function translate(text, lang)
    local tr = {
        MyWidget = "My Widget",
        FirstChannel = "First Channel",
        FillBackground = "Fill Background?",
        BgColor = "Bg Color",
        TextColor = "Text Color",
        BarColor = "Color"
    }
    local tr_fr = {
        MyWidget = "Mon Gadget",
        FirstChannel = "Permier canal",
        FillBackground = "Remplir le fond ?",
        BgColor = "Couleur du fond",
        TextColor = "Couleur du texte",
        BarColor = "Couleur"
    }
    local v
    if lang == "FR" then
        v = tr_fr[text]
    else
        v = tr[text]
    end
    return v == nil and text or v
end

return {
    refresh = refresh,
    name = name,
    create = create,
    update = update,
    options = options,
    translate = translate
}

[pfeerick]

Is the example code given compatible with the current Lua version and support? As I get errors as soon as I try it as things like const do not appear to be a Lua keyword in the limited Lua 5.2.2 engine currently in use ;) Pretty sure this was only added in 5.4

[DavBfr]

@pfeerick Sorry, that's not LUA at all. It's the right script now.

[pfeerick]

Very nice indeed. I'm guessing the original example code you had up will be seen again in a future PR? 😁

[DavBfr]

Very nice indeed. I'm guessing the original example code you had up will be seen again in a future PR? 😁

No, it's just the original typescript code. The Lua script is transpiled from it.