Lithium OS Compatibility API

--[[
    Lithium OS Compatibility API by LegoStax
]]--
function registerIcon( name, programdir, newx, newy )
    if fs.exists(".programs/icons/iconlist") then
        local file = fs.open(".programs/icons/iconlist", "r")
        icons = textutils.unserialize(file.readAll())
        file.close()
    else
        icons = {}
    end
    icon = {
        txt = name,
        dir = programdir,
        x = tonumber(newx),
        y = tonumber(newy)
    }
    icons[#icons + 1] = icon
    local file = fs.open(".programs/icons/iconlist", "w")
    file.write(texutils.serialize(icons))
    file.close()
    return true
end

function getIconList()
    icons = {}
    if fs.exists(".programs/icons/iconlist") then
        local file = fs.open(".programs/icons/iconlist", "r")
        icons = textutils.unserialize(file.readAll())
        file.close()
    end
    return icons
end

function drawIcon( icondirect, x, y )
    term.setCursorPos( x, y )
    img = paintutils.loadImage( ".programs/icons/"..icondirect )
    paintutils.drawImage( img, x, y )
end

function returnToLith()
    if fs.exists("lithos") then shell.run("lithos")
    else return end
end

function alert( title, alerttext, x, y )
    term.setTextColor(colors.white)
    term.setBackgroundColor(colors.blue)
    spaces = #alerttext - #title
    term.setCursorPos(x,y)
    term.write(" "..title)
    start = #title + 2
    for i = start,spaces do
        term.setCursorPos(i,y)
        term.write(" ")
    end
    term.setBackgroundColor(colors.red)
    x2 = #title + 3
    term.setCursorPos(x2,y)
    term.write("X")
    term.setTextColor(colors.lightGray)
    term.setBackgroundColor(colors.lightGray)
    term.setCursorPos(x,y+1)
    term.write(" "..alerttext.."  ")
    term.setTextColor(colors.black)
    term.setCursorPos(x,y+2)
    term.write(" "..alerttext.."  ")
    term.setTextColor(colors.lightGray)
    term.setCursorPos(x,y+3)
    term.write(" "..alerttext.."  ")
    term.setBackgroundColor(colors.black)
    term.setTextColor(colors.white)
    print(spaces)
    print(start)
end