dtv2

-- Setup
local bRunning = true
local nTerm_Width, nTerm_Height = term.getSize()
local oTerm = term.current()

-- Desktop Tables
local tDesktop_Windows = {}
local tDesktop_Files = {}
local tDesktop_Folders = {}
local tDesktop_ActiveWindow = nil

-- Config Tables
local tColours = {}
local tMenus = {}
local tPrograms = fs.list("/rom/programs")
local tBackgroundEvents = {
  "alarm",
  "timer",
  "redstone",
  "rednet_message",
  "disk",
  "disk_eject",
  "peripheral",
  "peripheral_detach",
  "modem_message"
}
local tColourPalette = {
  ["white"] = 1,
  ["orange"] = 2,
  ["magenta"] = 4,
  ["light blue"] = 8,
  ["lightblue"] = 8,
  ["yellow"] = 16,
  ["lime"] = 32,
  ["pink"] = 64,
  ["gray"] = 128,
  ["light gray"] = 256,
  ["lightgray"] = 256,
  ["cyan"] = 512,
  ["purple"] = 1024,
  ["blue"] = 2048,
  ["brown"] = 4096,
  ["green"] = 8192,
  ["red"] = 16384,
  ["black"] = 32768
}

-- Quick aliases
local fTC = term.setTextColor
local fBC = term.setBackgroundColor

-- OS Filepaths
local sFile_Config_Colours = "/djos/dj_colours.cfg"
local sFile_ActiveDir = "/desktop/"

-- Selectors
local sMenu = ""

-- Init
if not fs.exists("/desktop") then
    fs.makeDir("/desktop")
end
if not fs.exists("/djos") then
    fs.makeDir("/djos")
end

-- Config loading
local function fConfig_Load()
    local _f = fs.open(sFile_Config_Colours,"r")
    tColours = textutils.unserialise(_f.readAll())
    _f.close()
    local _f = fs.open(sFile_Config_Menus,"r")
    tMenus = textutils.unserialise(_f.readAll())
    _f.close()
    local _f = fs.open(sFile_Config_Menus,"r")
    tButtons = textutils.unserialise(_f.readAll())
    _f.close()
end

-- Config saving
local function fConfig_Save()
    local _f = fs.open(sFile_Config_Colours,"w")
    _f.write(textutils.serialise(tColours))
    _f.close()
end

-- Convert number to corresponding number
function fConvert_NTC(n)
    for k,v in pairs(tColourPalette) do
        if v == n then
            return k
        end
    end
end

-- Draw status bar above windows/menus
function fDraw_Bar(w)
    fBC(tColours["bar"].bg)
    fCP(w.x,w.y-1)
    for i=1,w.w do
        write(" ")
    end
    local nIcon = 1
    if w.bClose then
        term.setCursorPos(w.x+w.w-nIcon,w.y-1)
        term.setTextColor(tColors["bar"].close)
        print(string.char(7))
        nIcon = nIcon + 1
    end
    if w.bEdit then
        term.setCursorPos(w.x+w.w-nIcon,w.y-1)
        term.setTextColor(tColors["bar"].edit)
        print(string.char(7))
    end
    if w.bDrag then
        term.setCursorPos(w.x,w.y-1)
        term.setTextColor(tColors["bar"].drag)
        print(string.char(7))
    end
    if w.title then
        fCP(w.x+(w.w/2)-(#w.title/2),w.y-1)
        fTC(tColours["bar"].fg)
        print(w.title)
    end
end

-- Draw window
function fDraw_Window(w)
    fDraw_Bar(w)
end