local function translate(window, x, y)
    local winX, winY = window.getPosition()
    return x-winX+1, y-winY+1
end

local function contains(window, x, y)
    local winX, winY = window.getPosition()
    local width, height = window.getSize()
    return x >= winX and y >= winY and x-winX < width and y-winY < height
end

return {
    translate=translate,
    contains=contains,
}