STD-GUI (ComputerCraft)

--[[
    STD Graphical User Interface! (STD-GUI)!
    Made by LDDestroier/EldidiStroyrr (same guy)

    This program is a standalone GUI for Super Text Downloader, or STD for short.
    It has category sorting, program searching, smooth scrolling, and run support (not just download)
    This will tell you if you're overwriting a file, so no worry.

    pastebin get P9dDhQ2m stdgui
    std PB P9dDhQ2m stdgui
    wget https://github.com/LDDestroier/STD-GUI/raw/master/stdgui.lua
    std ld stdgui stdgui

    This is a stable release. You fool!
--]]

local useSetVisible = false

local tsv = function(visible)
    if term.current().setVisible and useSetVisible then
        term.current().setVisible(visible) -- comment out if you are debugging
    end
end

local isBeta = false -- changes the update URL
if type(std) ~= "table" then std = {} end

std.updateURL = {
    ["stable"]  = "https://raw.githubusercontent.com/LDDestroier/STD-GUI/master/stdgui.lua",
    ["beta"]    = "https://raw.githubusercontent.com/LDDestroier/STD-GUI/beta/stdgui.lua"
}

if not http then
    return false, printError("HTTP must be enabled to use STD. Contact an administrator for assistance.")
else
    if not http.checkURL("http://github.com") then
        return false, printError("For some reason, Github.com is whitelisted. Abort.")
    end
end
local scr_x, scr_y = term.getSize()

local doDisplayTitle = false
local relativePath = false
local doColorize = true

std.std_version = 101 -- to prevent updating to std command line

local overrideNoOS = false  -- prevent custom OS installer functionality

std.channel = "STD"
std.prevChannel = std.channel

std.channelURLs = { --special pastebin URLs for getting a list of files.
    ["STD"] = "https://raw.githubusercontent.com/LDDestroier/STD-GUI/master/list.lua", -- default store list on github, more updated
--  ["STD PB"] = "http://pastebin.com/raw/zVws7eLq",    -- default store list on pastebin, but just use github, man
    ["Discover"] = "http://pastebin.com/raw/9bXfCz6M",  -- owned by dannysmc95
--  ["OnlineAPPS"] = "http://pastebin.com/raw/g2EnDYLp",    -- owned by Twijn, but discontinued.
    ["STD-Media"] = "https://pastebin.com/raw/3JZHXTGL",    -- list of pictures and music
}
local palate -- yes I know shut up
palate = {
    pleasewait = {
        txt = colors.lightGray,
        bg = colors.black,
    },
    store = {
        bg = colors.black,
        txt = colors.white,
        bgchar = " ",
        entrybg = colors.gray,
        entrytxt = colors.white,
        entryasterisk = colors.lightGray,
        closetxt = colors.white,
        closebg = colors.red,
        previewtxt = colors.white,
        previewbg = colors.cyan,
        findbg = colors.white,
        findtxt = colors.black,
        indicatetxt = colors.black,
        indicatebg = colors.white,
        theendtxt = colors.gray,
        scrollbar = {
            knobbg = colors.black,
            knobtxt = colors.gray,
            knobchar = "|",
            barbg = colors.lightGray,
            bartxt = colors.gray,
            barchar = "|",
        }
    },
    item = {
        bg = colors.gray,
        txt = colors.white,
        specialtxt = colors.yellow,
        previewtxt = colors.white,
        previewbg = colors.black,
        forumtxt = colors.lightGray,
        forumbg = colors.gray,
        closetxt = colors.white,
        closebg = colors.red,
        runtxt = colors.white,
        runbg = colors.green,
        downloadtxt = colors.white,
        downloadbg = colors.green,
    },
    menubar = {
        bg = colors.black,
        categorytxt = colors.lightGray,
        categorybg = colors.black,
        channeltxt = colors.lightGray,
        channelbg = colors.black,
        hotkeytxt = colors.gray,
        categorymenu = {
            selecttxt = colors.lightGray,
            selectbg = colors.black,
            bg = colors.black,
            txt = colors.lightGray,
            orbtxt = colors.black,
            cursortxt = colors.black,
            cursorbg = colors.lightGray,
            borderbg = colors.black,
        },
        channelmenu = {
            selecttxt = colors.lightGray,
            selectbg = colors.black,
            bg = colors.lightGray,
            txt = colors.lightGray,
            orbtxt = colors.black,
            cursortxt = colors.black,
            cursorbg = colors.lightGray,
            borderbg = colors.black,
        }
    }
}

local getEvents = function(...)     -- basically os.pullEvent() but with multiple filters
    local arg, output = table.pack(...)
    while true do
        output = {os.pullEvent()}
        for a = 1, #arg do
            if type(arg[a]) == "boolean" then
                if doRender == arg[a] then
                    return {}
                end
            elseif output[1] == arg[a] then
                return unpack(output)
            end
        end
    end
end

local charClear = function(char)
    local cx,cy = term.getCursorPos()
    for y = 1, scr_y do
        term.setCursorPos(1,y)
        term.write(char:sub(1,1):rep(scr_x))
    end
    term.setCursorPos(cx,cy)
end

std.channelNames = {}
for k,v in pairs(std.channelURLs) do
    table.insert(std.channelNames,k)
end

std.stdList = "."..std.channel:lower().."_list"

std.currentOS = "CraftOS" -- enables integration into operating systems
if not overrideNoOS then
    if (fs.isDir("SimSoft/Data") and fs.isDir("SimSoft/SappS")) then -- checks if SimSoft is installed
        std.currentOS = "SimSoft"

    elseif (fs.exists("Axiom/sys.lua") or fs.exists("Axiom/sys.axs")) then  -- checks if Axiom is installed
        std.currentOS = "AxiomUI"

    elseif (fs.isDir("sys") and fs.isDir("usr") and fs.exists("sys/kernel.lua") and fs.exists("sys/boot/opus.boot")) then
        std.currentOS = "OpusOS"

    elseif (fs.isDir("Nova") and fs.isDir("Nova/apps")) then
        std.currentOS = "NovaHorizon"
    end
end

local cprint = function(txt,y)
    local cX,cY = term.getCursorPos()
    term.setCursorPos(math.ceil(scr_x/2)-math.floor(#txt/2),y or cY)
    term.write(txt)
end

local scroll = 1    -- one is the loneliest number...weeb
local scrollX = 1   -- to view longer program names
local maxScroll

local setMaxScroll = function(catagory)
    local output = 0
    for k,v in pairs(std.storeURLs) do
        if (v.catagory == catagory) or catagory == 0 then
            output = output + 1
        end
    end
    return (output*4)-(scr_y-4)
end
local catag = 0

local pleaseWait = function(text)
    term.setBackgroundColor(palate.pleasewait.bg)
    term.setTextColor(palate.pleasewait.txt)
    term.clear()
    cprint(text or "Getting list...please wait",scr_y/2)
end

local coolPleaseWait = function()
    local scr_x, scr_y = term.getSize()
    local cols = "f7"
    local length = scr_x/2
    local render = function(col1,col2,prog,forwards)
        term.setCursorPos(1,1)
        local screen = (col1:rep(prog)..col2:rep(length-prog)):rep(scr_x*scr_y):sub(1,(scr_x*scr_y))
        local line
        for a = forwards and 1 or scr_y, forwards and scr_y or 1, forwards and 1 or -1 do
            line = screen:sub((a-1)*scr_x+1,a*scr_x)
            term.setCursorPos(1,a)
            term.blit(("L"):rep(#line),line,line)
        end
    end
    local pos1 = 2
    local pos2 = pos1 - 1
    local forwards = true
    local reverse = false
    while true do
        for a = reverse and length or 1, reverse and 1 or length, reverse and -1 or 1 do
            render(cols:sub(pos1,pos1),cols:sub(pos2,pos2),a,forwards)
            sleep(0.0)
        end
           forwards = not forwards
        reverse = not reverse
        pos1 = (pos1 + 1)
        pos2 = (pos2 + 1)
        if pos1 > #cols then pos1 = 1 end
        if pos2 > #cols then pos2 = 1 end
    end
end

local setDefaultColors = function()
    term.setBackgroundColor(palate.store.bg)
    term.setTextColor(palate.store.txt)
end

local displayHelp = function(cli)
    local helptext = [[
This is a graphical interface to the STD downloader program.
Use 'stdgui update' to update the list, or use 'F5'.
If you want your program on it, PM LDDestroier on the CC forums.
Hotkeys:
    'Q' quit or back
    'F5' refresh
    'F1' set category
    'F3' set channel
    'F' or 'F6' search
    'F12' update STDGUI
    if normal computer, press 0-9 to select store item
]]
    if cli then
        return print(helptext)
    else
        setDefaultColors()
        term.clear()
        term.setCursorPos(2,2)
        print(helptext)
        sleep(0)
        print("\nPress a key to go back.")
        os.pullEvent("key")
        return
    end
end

local getTableSize = function(tbl)
    local amnt = 0
    for k,v in pairs(tbl) do
        amnt = amnt + 1
    end
    return amnt
end

local colors_names = {
    ["0"] = colors.white,
    ["1"] = colors.orange,
    ["2"] = colors.magenta,
    ["3"] = colors.lightBlue,
    ["4"] = colors.yellow,
    ["5"] = colors.lime,
    ["6"] = colors.pink,
    ["7"] = colors.gray,
    ["8"] = colors.lightGray,
    ["9"] = colors.cyan,
    ["a"] = colors.purple,
    ["b"] = colors.blue,
    ["c"] = colors.brown,
    ["d"] = colors.green,
    ["e"] = colors.red,
    ["f"] = colors.black,
}

local blit_names = {}
for k,v in pairs(colors_names) do
    blit_names[v] = k
end

local codeNames = { -- just for checking, not for any translation
    ["r"] = "reset",
    ["{"] = "stopFormatting",
    ["}"] = "startFormatting",
}

local explode = function(div,str)
    if (div=='') then return false end
    local pos,arr = 0,{}
    for st,sp in function() return string.find(str,div,pos,true) end do
        table.insert(arr,string.sub(str,pos,st-1))
        pos = sp + 1
    end
    table.insert(arr,string.sub(str,pos))
    return arr
end

local blitWrap = function(text,txt,bg)
    local allIssues = ""
    if not text then allIssues = allIssues.."no text, " end
    if not txt then allIssues = allIssues.."no txt, " end
    if not bg then allIssues = allIssues.."no bg, " end
    if not (#text == #txt and #txt == #bg) then allIssues = allIssues.."incongruent lengths" end
    if #allIssues > 0 then error(allIssues) end
    local wordNo = 1
    local words = explode(" ",text)
    local lines = 0
    local scr_x, scr_y = term.getSize()
    local cx,cy
    for a = 1, #text do
        cx,cy = term.getCursorPos()
        if text:sub(a,a) == " " and text:sub(a-1,a-1) ~= " " and a > 1 then
            wordNo = wordNo + 1
            if cx + #words[wordNo] > scr_x then
                term.setCursorPos(1,cy+1)
                lines = lines + 1
            end
        end
        cx,cy = term.getCursorPos()
        if text:sub(a,a) == "\n" then
            term.setCursorPos(1,cy+1)
            lines = lines + 1
        elseif not (cx == 1 and text:sub(a,a) == " ") then
            term.blit(text:sub(a,a),txt:sub(a,a),bg:sub(a,a))
        end
        if cx == scr_x then
            term.setCursorPos(1,cy+1)
            lines = lines + 1
        end
    end
    return lines
end

local moveOn, textToBlit
textToBlit = function(str,substart,substop)
    local p = 1
    local output = ""
    local txcolorout = ""
    local bgcolorout = ""
    local txcode = "&"
    local bgcode = "~"
    local doFormatting = true
    local usedformats = {}
    local txcol,bgcol = blit_names[term.getTextColor()], blit_names[term.getBackgroundColor()]
    local origTX,origBG = blit_names[term.getTextColor()], blit_names[term.getBackgroundColor()]
    local cx,cy,barestr
    substart = substart or 0
    substop = substop or #str
    if not (substart == 0 and substop == #str) then
        barestr = textToBlit(str)
    else
        if substart < 0 then
            substart = #realstr - substart
        end
        if substop < 0 then
            substop = #realstr - substop
        end
    end
    moveOn = function(tx,bg)
        if p >= substart and p <= substop then
            output = output..str:sub(p,p)
            txcolorout = txcolorout..tx
            bgcolorout = bgcolorout..bg
        end
    end
    while p <= #str do
        if str:sub(p,p) == txcode then
            if colors_names[str:sub(p+1,p+1)] and doFormatting then
                txcol = str:sub(p+1,p+1)
                usedformats.txcol = true
                p = p + 1
            elseif codeNames[str:sub(p+1,p+1)] then
                if str:sub(p+1,p+1) == "r" and doFormatting then
                    txcol = blit_names[term.getTextColor()]
                    p = p + 1
                elseif str:sub(p+1,p+1) == "{" and doFormatting then
                    doFormatting = false
                    p = p + 1
                elseif str:sub(p+1,p+1) == "}" and (not doFormatting) then
                    doFormatting = true
                    p = p + 1
                else
                    moveOn(txcol,bgcol)
                end
            else
                moveOn(txcol,bgcol)
            end
            p = p + 1
        elseif str:sub(p,p) == bgcode then
            if colors_names[str:sub(p+1,p+1)] and doFormatting then
                bgcol = str:sub(p+1,p+1)
                usedformats.bgcol = true
                p = p + 1
            elseif codeNames[str:sub(p+1,p+1)] and (str:sub(p+1,p+1) == "r") and doFormatting then
                bgcol = blit_names[term.getBackgroundColor()]
                p = p + 1
            else
                moveOn(txcol,bgcol)
            end
            p = p + 1
        else
            moveOn(txcol,bgcol)
            p = p + 1
        end
    end
    return output, txcolorout, bgcolorout, usedformats
end

local writef = function(txt,noWrite,substart,substop)
    local cx,cy
    if doColorize then
        local text, textCol, bgCol, usedformats = textToBlit(txt,substart,substop)
        local out = blitWrap(text,textCol,bgCol,noWrite)
        return out, #text, usedformats
    else
        if noWrite then
            cx,cy = term.getCursorPos()
            return math.floor((cx+#cf(txt))/scr_x), #cf(txt), {} -- this is approximate, and might mess up with multiline strings
        else
            return write(txt), #txt, {}
        end
    end
end

local printf = function(txt,noWrite)
    return writef(tostring(txt.."\n"),noWrite)
end

local runURL = function(url, ...)
    local program = http.get(url)
    if not program then return false end
    program = program.readAll()
    return load(program, nil, nil, _ENV)(...)
end

local bow = function()
    term.setBackgroundColor(palate.store.findbg)
    term.setTextColor(palate.store.findtxt)
end

local strless = function(str,txt,bg)
    local x,y = 0,0
    local shiftDown = false
    local str = explode("\n",str or "")
    local render = function()
        term.setBackgroundColor(bg)
        term.setTextColor(txt)
        for i = y+1, (scr_y+y)-1 do
            term.setCursorPos(math.max(1,-x),i-y)
            term.clearLine()
            if str[i] then
                term.write(str[i]:sub(math.max(1,x+1)))
            end
        end
        term.setCursorPos(1,scr_y)
        term.setBackgroundColor(colors.gray)
        term.setTextColor(colors.white)
        term.clearLine()
        term.write("(Q)uit, Goto (L)ine")
        local ting = "Ln."..math.min(math.max(y+1,0),#str)
        term.setCursorPos((scr_x-#ting)+1,scr_y)
        term.write(ting)
    end
    render()
    maxY = (#str-scr_y)+1
    while true do
        local evt, key, mx, my = os.pullEvent()
        local oldY = y
        local oldX = x
        if evt == "key" then
            if key == keys.leftShift then
                shiftDown = true
            elseif key == keys.up then
                y = y-1
            elseif key == keys.down then
                y = y+1
            elseif key == keys.pageUp then
                y = y-(scr_y-1)
            elseif key == keys.pageDown then
                y = y+(scr_y-1)
            elseif key == keys.left then
                x = x-1
            elseif key == keys.right then
                x = x+1
            elseif key == keys.home then
                y = 0
            elseif key == keys["end"] then
                y = maxY
            elseif (key == keys.q) or (key == keys.x) then
                sleep(0)
                break
            elseif (key == keys.l) then
                term.setCursorPos(1,scr_y)
                term.setBackgroundColor(colors.gray)
                term.setTextColor(colors.white)
                term.clearLine()
                term.write("Line #:")
                sleep(0)
                y = (tonumber(read()) or (y+1)) - 1
            end
        elseif evt == "key_up" then
            if key == keys.leftShift then
                shiftDown = false
            end
        elseif evt == "mouse_scroll" then
            if shiftDown then
                x = x + key
            else
                y = y + key
            end
        elseif evt == "mouse_click" and key == 1 then
            if my == scr_y and (mx >= 1 and mx <= 11) then
                sleep(0)
                break
            end
        end
        if x < 0 then x = 0 end
        if y < 0 then y = 0 end
        if y > maxY then y = maxY end
        if (x ~= oldX) or (y ~= oldY) or (key == keys.l) then
            render()
        end
    end
end
local contentsFile = function(url)
    local prog = http.get(url)
    if prog then return prog.readAll()
    else return false, "could not connect" end
end
local getFile = function(filename,url)
    if fs.isReadOnly(filename) then
        return false, "access denied"
    end
    local prog
    if type(url) == "table" then
        prog = setfenv(url[1], _ENV)(filename)
    else
        prog = http.get(url)
        if not prog then
            return false, "could not connect"
        end
        prog = prog.readAll()
        local fyle = fs.open(filename,"w")
        fyle.write(prog)
        fyle.close()
    end
    if type(url) == "table" then
        return true, 0
    else
        return true, fs.getSize(filename)
    end
end
local runFile = function(path, ...)
    if not fs.exists(path) then
        return false, "No such file!"
    end
    local file = fs.open(path,"r")
    local contents = file.readAll()
    file.close()
    local func = load(contents, nil, nil, _ENV)
    return func(...)
end
std.getSTDList = function(prevChannel)
    catag = 0
    local url = std.channelURLs[std.channel] --URL of URL list for whatever channel you have selected.
    pleaseWait()
    local outcome, size = getFile(std.stdList, std.channelURLs[std.channel])
    if not outcome then
        if shell then
            print("Couldn't update list!")
        end
        return false, "Couldn't update list!"
    else
        local outcome = runFile(std.stdList)
        if outcome == false then
            term.setBackgroundColor(colors.black)
            term.setTextColor(term.isColor() and colors.red or colors.lightGray)
            term.clear()
            cprint("STD channel \""..std.channel.."\" is down right now.",2)
            term.setTextColor(colors.white)
            cprint("Either try again later,",4)
            cprint("contact LDDestroier on the CC forums,",5)
            cprint("or tell the owner of the channel.",6)
            cprint("Press a key to go back.",8)
            term.setTextColor(colors.gray)
            cprint("Sorry bout that!",scr_y)
            std.channel = prevChannel
            sleep(0.1)
            os.pullEvent("char")
            pleaseWait("Changing list...please wait...")
            return std.getSTDList("STD")
        end
        local output
        if not fs.isReadOnly(std.stdList) then
            output = "Downloaded to "..std.stdList
        else
            output = "Got store codes."
        end
        maxScroll = setMaxScroll(catag)
        return true, output
    end
end

local cisf = function(str,fin)
    fin = fin:gsub("%[","%%["):gsub("%(","%%("):gsub("%]","%%]"):gsub("%)","%%)")
    return string.find(str:lower(),fin:lower())
end

local clearMostline = function(length,char)
    local pX,pY = term.getCursorPos()
    term.setCursorPos(1,pY)
    term.write(string.rep(char or " ",length or (scr_x-1)))
    term.setCursorPos(pX,pY)
end

local dotY
local doScrollBar = false

local renderStore = function(list,filter,scrollY,namescroll,fixedDotY,buttonIndicate)
    local fullrend = {}
    local visiblerend = {}
    local amnt = 0
    local output = {}
    local colors_output = {}
    local num = 0
    if tsv then tsv(false) end
    for k,v in pairs(list) do
        if (v.catagory == filter) or filter == 0 then
            fullrend[1+#fullrend] = {table.concat({" &", blit_names[palate.store.entryasterisk], "*&", blit_names[palate.store.entrytxt], v.title}), v}
            fullrend[1+#fullrend] = {" by &r"..v.creator,v}
            fullrend[1+#fullrend] = {" Category: "..std.storeCatagoryNames[v.catagory],v,v.catagory}
            fullrend[1+#fullrend] = "nilline"
        end
    end
    fullrend[1+#fullrend] = ""
    dotY = fixedDotY or math.floor((scr_y-2)*((scroll-1)/(maxScroll-1)))+2

    for a = scrollY, (scr_y+scrollY)-1 do
        if type(fullrend[a]) == "table" then

            visiblerend[1+#visiblerend] = fullrend[a][1]
            output[1+#output] = fullrend[a][2]

            colors_output[1+#colors_output] = fullrend[a][3] and fullrend[a][3] or false
        else
            visiblerend[1+#visiblerend] = fullrend[a]
            output[1+#output] = {}
            colors_output[1+#colors_output] = false
        end
    end

    setDefaultColors()
    charClear(palate.store.bgchar)

    for a = 1, #visiblerend do
        term.setCursorPos(2-namescroll,1+a)
        if visiblerend[a] == "nilline" then
            setDefaultColors()
            clearMostline()
        else
            if a < #visiblerend then
                if term.isColor() then
                    if colors_output[a] then
                        term.setBackgroundColor(std.storeCatagoryColors[colors_output[a]].bg)
                        term.setTextColor(std.storeCatagoryColors[colors_output[a]].txt)
                    else
                        term.setBackgroundColor(palate.store.entrybg)
                        term.setTextColor(palate.store.entrytxt)
                    end
                else
                    term.setBackgroundColor(colors.gray)
                    term.setTextColor(colors.white)
                end
                clearMostline()
                writef(visiblerend[a])
            else
                term.setBackgroundColor(palate.store.bg)
                term.setTextColor(palate.store.theendtxt)
                cprint("That's them all!")
            end
        end
    end
    local b
    for a = 2, scr_y do
        term.setCursorPos(scr_x,a)
        if a == dotY then
            term.setTextColor(palate.store.scrollbar.knobtxt)
            term.setBackgroundColor(palate.store.scrollbar.knobbg)
            term.write(palate.store.scrollbar.knobchar)
        else
            term.setTextColor(palate.store.scrollbar.bartxt)
            term.setBackgroundColor(palate.store.scrollbar.barbg)
            term.write(palate.store.scrollbar.barchar)
        end
        if buttonIndicate then
            term.setCursorPos(scr_x-4,a)
            term.setBackgroundColor(palate.store.indicatebg)
            term.setTextColor(palate.store.indicatetxt)
            b = (a+1)/4
            if (b == math.floor(b)) and (visiblerend[a] and visiblerend[a] ~= "nilline") then
                term.write(" "..tostring(b):sub(#tostring(b)).." ")
            end
        end
    end
    if tsv then tsv(true) end
    return output
end

local simSoftInstall = function(obj, objname, appname)
    local installSystemName = "STD App Distribution (sad...)"
    appname = appname or objname
    local getFromURL = function(url)
        local fuck
        if type(url) == "table" then
            fuck = setfenv(url[1], _ENV)(filename)
            return nil
        else
            fuck = http.get(url)
        end
        if not fuck then
            return shit
        else
            if type(url) == "table" then
                return fuck.readAll(), false
            else
                return fuck.readAll(), (string.find(url,"://pastebin.com/raw/") and (url:sub(-9):gsub("/","")) or false)
            end
        end
    end
    local mainpath = fs.combine("/SimSoft/SappS",objname)
    local cont,pbcode = getFromURL(obj.url)
    local file = fs.open("\""..fs.combine(mainpath,pbcode or "program").."\"","w")
    file.write(cont)
    file.close()
    local file = fs.open(fs.combine(mainpath,"SappS"),"w")
    file.writeLine(installSystemName)
    file.writeLine("\""..fs.combine(mainpath,pbcode or "program").."\"")
    file.writeLine(appname:sub(1,9))
    file.close()
    return true, "Installed!"
end

local getFindList = function(name)
    local output = {}
    for k,v in pairs(std.storeURLs) do
        if cisf(k,name) or cisf(textToBlit(v.title),name) or cisf(textToBlit(v.creator),name) then
            output[k] = v
        end
        if output[k] ~= v and v.keywords then
            for a = 1, #v.keywords do
                if cisf(v.keywords[a],name) then
                    output[k] = v
                    break
                end
            end
        end
    end
    return output
end

local doFindFunc = function(name)
    scroll = 1
    maxScroll = setMaxScroll(catag)
    renderStore( getFindList(name) ,catag, scroll, scrollX, _, not term.isColor() )
    term.setCursorPos(1,1)
    bow()
    term.clearLine()
    write("Find: ")
end

local funcread = function(repchar, rHistory, doFunc, noNewLine)
    local scr_x,scr_y = term.getSize()
    local sx,sy = term.getCursorPos()
    local cursor = 1
    rHistory = rHistory or {}
    local rCursor = #rHistory+1
    local output = ""
    term.setCursorBlink(true)
    while true do
        local evt,key = os.pullEvent()
        local cx,cy = term.getCursorPos()
        if evt == "key" then
            if key == keys.enter then
                if not noNewLine then
                    write("\n")
                end
                term.setCursorBlink(false)
                return output
            elseif key == keys.left then
                if cursor-1 >= 1 then
                    cursor = cursor - 1
                end
            elseif key == keys.right then
                if cursor <= #output then
                    cursor = cursor + 1
                end
            elseif key == keys.up then
                if rCursor > 1 then
                    rCursor = rCursor - 1
                    term.setCursorPos(sx,sy)
                    term.write((" "):rep(#output))
                    output = rHistory[rCursor] or ""
                    cursor = #output+1
                    pleaseDoFunc = true
                end
            elseif key == keys.down then
                term.setCursorPos(sx,sy)
                term.write((" "):rep(#output))
                if rCursor < #rHistory then
                    rCursor = rCursor + 1
                    output = rHistory[rCursor] or ""
                    cursor = #output+1
                    pleaseDoFunc = true
                else
                    rCursor = #rHistory+1
                    output = ""
                    cursor = 1
                end
            elseif key == keys.backspace then
                if cursor > 1 and #output > 0 then
                    output = output:sub(1,cursor-2)..output:sub(cursor)
                    cursor = cursor - 1
                    pleaseDoFunc = true
                end
            elseif key == keys.delete then
                if #output:sub(cursor,cursor) == 1 then
                    output = output:sub(1,cursor-1)..output:sub(cursor+1)
                    pleaseDoFunc = true
                end
            end
        elseif evt == "char" or evt == "paste" then
            output = output:sub(1,cursor-1)..key..output:sub(cursor+(#key-1))
            cursor = cursor + #key
            pleaseDoFunc = true
        end
        if pleaseDoFunc then
            pleaseDoFunc = false
            if type(doFunc) == "function" then
                doFunc(output)
            end
            term.setCursorPos(sx,sy)
            local pOut = output
            if #output >= scr_x-(sx-2) then
                pOut = output:sub((#output+(sx))-scr_x)
            end
            if repchar then
                term.write(repchar:sub(1,1):rep(#pOut).." ")
            else
                term.write(pOut.." ")
            end
            local cx,cy = term.getCursorPos()
        end
        term.setCursorPos(sx+cursor-1,cy)
    end
end

local prevList
local findPrompt = function()
    local cX,cY = term.getCursorPos()
    sleep(0)
    if prevList then std.storeURLs = prevList end
    doFindFunc("")
    prevList = std.storeURLs
    std.storeURLs = getFindList(funcread(nil,{},doFindFunc,false))
    term.setCursorBlink(false)
    maxScroll = setMaxScroll(catag)
end

local displayTitle = function()
    local title = {{},{},{},{},{0,0,0,0,0,1,1,1,1,1,0,0,2,2,2,2,2,2,2,0,2,2,2,2,0,0,32768,},{0,0,0,0,1,1,0,0,0,1,1,0,0,0,0,2,0,0,0,0,0,2,0,2,2,0,32768,},{0,0,0,0,1,0,0,0,0,0,1,0,0,0,2,2,0,0,0,0,2,2,0,0,2,0,32768,},{0,0,0,0,1,1,0,0,0,0,0,0,0,0,2,0,0,0,0,0,2,0,0,0,2,0,32768,},{0,0,0,0,0,1,1,1,1,1,0,0,0,0,2,0,0,0,0,2,2,0,0,2,2,0,32768,},{0,0,0,0,0,0,0,0,0,1,0,0,0,2,2,0,0,0,2,2,0,0,2,2,0,0,32768,},{0,0,0,1,1,0,0,0,1,1,0,0,2,2,0,0,0,2,2,0,0,2,2,0,0,32768,1,},{0,0,0,0,1,1,1,1,1,0,0,0,2,0,0,0,2,2,2,2,2,2,0,0,32768,1,1,},{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,32768,1,1,1,},{0,0,0,32768,32768,32768,32768,32768,32768,32768,32768,32768,32768,32768,32768,32768,32768,32768,32768,32768,32768,32768,32768,1,1,1,1}}
    setDefaultColors()
    term.clear()
    paintutils.drawImage(title,-1,1)
    setDefaultColors()
    term.setCursorPos(4,16)
    term.write("STD-GUI "..(isBeta and "beta" or "stable"))
    sleep(0)
    local evt
    repeat
        evt = os.pullEvent()
    until evt == "mouse_click" or evt == "key"
    sleep(0)
end

local fixDotY

local renderStoreItem = function(obj) --now being experimented on...
    if not obj.title then return false end
    local showPostURL = false
    local bruffer
    local scroll = 1
    local doRedraw = true
    local extraLines
    while true do
        bruffer = {
            "",
            table.concat({" &", blit_names[palate.item.specialtxt], obj.title}),
            table.concat({" &", blit_names[palate.item.txt], "by &", blit_names[palate.item.specialtxt], obj.creator}),
            table.concat({" &", blit_names[palate.item.txt], "Category: ", std.storeCatagoryNames[obj.catagory]}),
            "",
            table.concat({"&", blit_names[palate.item.txt], obj.description,})
        }
        if showPostURL and obj.forumPost then
            local post = table.concat({" &", blit_names[palate.item.forumtxt], "~", blit_names[palate.item.forumbg], obj.forumPost:gsub("http://www.",""):sub(1,-2)})
            bruffer[#bruffer+1] = "&8Forum URL: "..post
        end
        if doRedraw then
            term.setBackgroundColor(palate.item.bg)
            term.clear()
            term.setCursorPos(1,(-scroll)+2)
            extraLines = 0
            for y = 1, #bruffer do
                if not bruffer[y] then break end
                extraLines = extraLines + printf(bruffer[y])
            end

            term.setCursorPos(1,scr_y)
            if term.isColor() then
                term.setTextColor(palate.item.closetxt)
                term.setBackgroundColor(palate.item.closebg)
            else
                term.setTextColor(colors.black)
                term.setBackgroundColor(colors.white)
            end
            term.clearLine()
            if term.isColor() then
                term.write("CLOSE")
            else
                term.write("(Q) to CLOSE")
            end
            if term.isColor() then
                term.setTextColor(palate.store.previewtxt)
                term.setBackgroundColor(palate.store.previewbg)
                term.setCursorPos((scr_x-16),scr_y)
                term.write("VIEW")
                term.setTextColor(palate.item.runtxt)
                term.setBackgroundColor(palate.item.runbg)
                term.setCursorPos((scr_x-11),scr_y)
                term.write("RUN")
            else
                term.setTextColor(colors.black)
                term.setBackgroundColor(colors.white)
                term.setCursorPos((scr_x-22),scr_y)
                term.write("(V)IEW")
                term.setTextColor(colors.black)
                term.setBackgroundColor(colors.white)
                term.setCursorPos((scr_x-15),scr_y)
                term.write("(R)UN")
            end
            local txt
            if std.currentOS ~= "CraftOS" then
                if term.isColor() then
                    term.setTextColor(palate.item.downloadtxt)
                    term.setBackgroundColor(palate.item.downloadbg)
                    txt = "INSTALL!"
                else
                    txt = "(I)NSTALL"
                end
            else
                if term.isColor() then
                    term.setTextColor(palate.item.downloadtxt)
                    term.setBackgroundColor(palate.item.downloadbg)
                    txt = "DOWNLOAD"
                else
                    txt = "(D)OWNLOAD"
                end
            end
            term.setCursorPos((scr_x-(#txt-1)),scr_y)
            term.write(txt)
            doRedraw = false
        end
        local evt = {getEvents("key","mouse_click","mouse_scroll","term_resize")}
        if evt[1] == "key" then
            if evt[2] == keys.f then
                showPostURL = not showPostURL
                doRedraw = true
            elseif evt[2] == keys.d or evt[2] == keys.i or evt[2] == keys.r or evt[2] == keys.q or evt[2] == keys.v then
                return unpack(evt)
            end
        elseif evt[1] == "mouse_click" then
            if evt[4] == scr_y then
                return unpack(evt)
            end
        elseif evt[1] == "mouse_scroll" then
            if scroll+evt[2] >= 1 and scroll+evt[2] <= (#bruffer+extraLines)-(scr_y-8) then
                scroll = scroll + evt[2]
                doRedraw = true
            end
        elseif evt[1] == "term_resize" then
            doRedraw = true
            scr_x,scr_y = term.getSize()
        end
    end
end

local renderCatagoryMenu = function(expanded,cursor)
    if expanded then
        term.setCursorPos(1,1)
        term.setBackgroundColor(palate.menubar.bg)
        term.clearLine()
        term.setBackgroundColor(palate.menubar.categorymenu.selectbg)
        term.setTextColor(palate.menubar.categorymenu.selecttxt)
        if term.isColor() then
            if cursor == 0 then
                term.setTextColor(palate.menubar.categorymenu.txt)
                term.write(" No category")
            else
                term.write("Select category:")
            end
        else
            term.setCursorPos(1,1)
            if cursor == 0 then
                term.setTextColor(palate.menubar.categorymenu.txt)
                term.write(" No category")
            else
                term.write(" Pick category with up/down:")
            end
        end
        term.setTextColor(palate.menubar.categorymenu.txt)
        term.setBackgroundColor(palate.menubar.categorymenu.bg)
        local yposes = {}
        local longestLen = 0
        for a = 1, #std.storeCatagoryNames do
            if #std.storeCatagoryNames[a]+2 > longestLen then
                longestLen = #std.storeCatagoryNames[a]+2
            end
        end
        longestLen = longestLen+1
        for a = 0, #std.storeCatagoryNames do
            term.setCursorPos(1,a+1)
            if term.isColor() then
                term.setTextColor(palate.menubar.categorymenu.orbtxt)
                term.setBackgroundColor(palate.menubar.categorymenu.bg)
                if type(std.storeCatagoryColors) == "table" then
                    if std.storeCatagoryColors[a] then
                        term.setTextColor(std.storeCatagoryColors[a].txt)
                        term.setBackgroundColor(std.storeCatagoryColors[a].bg)
                    end
                end
            else
                term.setTextColor(colors.black)
                term.setBackgroundColor(colors.lightGray)
            end
            if a > 0 then
                clearMostline(longestLen+2)
            end
            if a == cursor then
                if type(std.storeCatagoryColors) ~= "table" then
                    if term.isColor() then
                        if cursor == 0 then
                            term.setTextColor(palate.menubar.categorymenu.txt)
                            term.setBackgroundColor(palate.menubar.categorymenu.bg)
                        else
                            term.setTextColor(palate.menubar.categorymenu.cursortxt)
                            term.setBackgroundColor(palate.menubar.categorymenu.cursorbg)
                        end
                    else
                        term.setTextColor(colors.black)
                        term.setBackgroundColor(colors.lightGray)
                    end
                elseif cursor == 0 then
                    term.setBackgroundColor(colors.black)
                end
                write(">")
            elseif a > 0 then
                write(" ")
            end
            if a > 0 then
                if type(std.storeCatagoryColors) ~= "table" then
                    term.setTextColor(palate.menubar.categorymenu.orbtxt)
                    term.setBackgroundColor(palate.menubar.categorymenu.bg)
                end
                if a == catag then
                    write("@ ")
                else
                    write("O ")
                end
                write(std.storeCatagoryNames[a])
                if term.isColor() then
                    term.setBackgroundColor(palate.menubar.categorymenu.borderbg)
                else
                    term.setBackgroundColor(colors.black)
                end
                term.setCursorPos(longestLen+2,a+1)
                term.write(" ")
                yposes[#yposes+1] = 1+a
            end
        end
        term.setCursorPos(1,#std.storeCatagoryNames+2)
        term.write((" "):rep(longestLen+2))
        return yposes,longestLen+2
    else
        term.setCursorPos(1,1)
        term.setBackgroundColor(palate.menubar.bg)
        term.clearLine()
        term.setTextColor(palate.menubar.categorytxt)
        term.setBackgroundColor(palate.menubar.categorybg)
        term.write("Cat.")
        term.setTextColor(palate.menubar.hotkeytxt)
        term.write("F1")
        term.setCursorPos(8,1)
        term.setTextColor(palate.menubar.channeltxt)
        term.setBackgroundColor(palate.menubar.channelbg)
        term.write("Chan.")
        term.setTextColor(palate.menubar.hotkeytxt)
        term.write("F3")
        term.setCursorPos(16,1)
        term.setTextColor(palate.menubar.categorytxt)
        term.write("("..std.currentOS..")")
    end
    if term.isColor() then
        term.setCursorPos(scr_x-4,1)
        term.setBackgroundColor(palate.store.closebg)
        term.setTextColor(palate.store.closetxt)
        term.write("CLOSE")
    else
        term.setCursorPos(scr_x-11,1)
        term.setBackgroundColor(colors.black)
        term.setTextColor(colors.white)
        term.write("'Q' to CLOSE")
    end
    setDefaultColors()
end

local renderChannelMenu = function(cursor)
    term.setCursorPos(1,1)
    term.setBackgroundColor(palate.menubar.bg)
    term.clearLine()
    term.setBackgroundColor(palate.menubar.channelmenu.selectbg)
    term.setTextColor(palate.menubar.channelmenu.selecttxt)
    term.write("Select channel:")
    term.setTextColor(palate.menubar.channelmenu.txt)
    term.setBackgroundColor(palate.menubar.channelmenu.bg)
    local yposes = {}
    local longestLen = 0
    for a = 1, #std.channelNames do
        if #std.channelNames[a] > longestLen then
            longestLen = #std.channelNames[a]
        end
    end
    longestLen = longestLen + 4
    for a = 1, #std.channelNames do
        term.setBackgroundColor(palate.menubar.channelmenu.bg)
        term.setCursorPos(1,a+1)
        clearMostline(longestLen+2)
        if a == cursor then
            term.setTextColor(palate.menubar.channelmenu.cursortxt)
            term.setBackgroundColor(palate.menubar.channelmenu.cursorbg)
            write(">")
        else
            write(" ")
        end
        term.setTextColor(palate.menubar.channelmenu.orbtxt)
        term.setBackgroundColor(palate.menubar.channelmenu.bg)
        if std.channel == std.channelNames[a] then
            write("@ ")
        else
            write("O ")
        end
        term.write(" "..std.channelNames[a])
        if term.isColor() then
            term.setBackgroundColor(palate.menubar.channelmenu.borderbg)
        else
            term.setBackgroundColor(colors.black)
        end
        term.setCursorPos(longestLen+2,a+1)
        term.write(" ")
        yposes[1+#yposes] = {a+1,std.channelNames[a],std.channelURLs[std.channelNames[a]]}
    end
    term.setCursorPos(1,#std.channelNames+2)
    term.write((" "):rep(longestLen+2))
    return yposes,longestLen+2
end

local tArg = {...}

if tArg[1] == "help" then
    return displayHelp(true)
elseif tArg[1] == "upgrade" then
    local updateURL = std.updateURL[isBeta and "beta" or "stable"]
    local res, outcome = getFile(shell.getRunningProgram(),updateURL)
    if not res then
        error(outcome)
    else
        print("Updated STD-GUI to latest "..(isBeta and "beta." or "stable.").." ("..outcome.." bytes)")
        return
    end
end

local res, outcome
if tArg[1] == "update" then
    res, outcome = std.getSTDList(std.prevChannel)
    print(outcome)
    return
else
    if not std.storeURLs then
        pleaseWait() -- he said please
        res, outcome = std.getSTDList(std.prevChannel)
    end
end

local cleanExit = function()
    term.setTextColor(colors.white)
    term.setBackgroundColor(colors.black)
    term.clear()
    local out
    if pocket then
        out = "Thanks for using STD!"
    else
        out = "Thank you for using STD-GUI!"
    end
    if std.currentOS ~= "CraftOS" then
        term.setCursorBlink(false)
    end
    cprint(out,scr_y/2)
    term.setCursorPos(1,scr_y)
    sleep(0)
    return true, "This shouldn't be an error."
end

local STDdownloadPrompt = function(item, itname, savepath)
    term.setCursorPos(1,scr_y)
    if not itname then
        for k,v in pairs(std.storeURLs) do
            if item.url == v.url then
                itname = k
                break
            end
        end
    end
    if not savepath then
        bow()
        term.clearLine()
        write("Save as: ")
        savepath = funcread(nil,{},nil,true)
    end
    term.setCursorBlink(false)
    if savepath:gsub(" ","") == "" then
        sleep(0)
        return
    else
        if relativePath then
            savepath = fs.combine(shell.dir(),savepath)
        end
        if fs.exists(savepath) then
            term.setCursorPos(1,scr_y)
            term.clearLine()
            write("Overwrite? (Y/N)")
            local key
            repeat
                _,key = os.pullEvent("char")
            until string.find("yn",key)
            if key == "n" then
                sleep(0)
                return
            end
        end
        term.setCursorPos(1,scr_y)
        term.clearLine()
        term.write("Downloading...")
        local res, outcome = getFile(savepath,item.url)
        term.setCursorPos(1,scr_y)
        term.clearLine()
        if not res then
            term.write(outcome)
            sleep(0.6)
        else
            term.write("Downloaded! ("..outcome.." bytes)")
            sleep(0.7)
        end
    end
    return
end

SimSoftDownloadPrompt = function(object)
    local itname
    for k,v in pairs(std.storeURLs) do
        if object.url == v.url then
            itname = k
            break
        end
    end
    term.setCursorPos(1,scr_y)
    bow()
    term.clearLine()
    write("Label?:")
    local custLabel = funcread(_,_,_,true)
    if #custLabel:gsub("%s","") == 0 then
        custLabel = nil
    else
        custLabel = custLabel:sub(1,9)
    end
    term.setCursorPos(1,scr_y)
    term.clearLine()
    term.write("Downloading...")
    local res, outcome = simSoftInstall(object, itname or object.title:gsub(" ","-"), custLabel)
    term.setCursorPos(1,scr_y)
    term.clearLine()
    term.write(outcome)
    sleep(#outcome/13)
end

local customInstaller = function(OS, item)
    for k,v in pairs(std.storeURLs) do
        if item.url == v.url then
            itname = k
            break
        end
    end
    local savepath
    local installers = {
        ["CraftOS"] = function(item)
            return STDdownloadPrompt(item, itname, nil)
        end,
        ["AxiomUI"] = function(item)
            if std.storeURLs[itname].catagory == 8 then
                savepath = fs.combine("/home/APIs", itname)
            else
                savepath = fs.combine("/Axiom/programs", itname) .. ".app"
            end
            -- creates a desktop shortcut for all users if *not* an API
            if std.storeURLs[itname].catagory ~= 8 then
                if fs.isDir("home/Desktop") then
                    local file = fs.open(fs.combine("home/Desktop", itname)..".lnk", "w")
                    file.write(savepath)
                    file.close()
                else
                    local users = fs.list("home")
                    for i = 1, #users do
                        if users[i] ~= "prg" then
                            local file = fs.open(fs.combine("home/" .. users[i] .. "/Desktop",itname)..".lnk", "w")
                            file.write(savepath)
                            file.close()
                        end
                    end
                end
            end
            return STDdownloadPrompt(item, itname, savepath)
        end,
        ["SimSoft"] = function(item)
            return SimSoftDownloadPrompt(item)
        end,
        ["OpusOS"] = function(item)
            -- changes path if an API
            if std.storeURLs[itname].catagory == 8 then
                savepath = fs.combine("/sys/apis", itname)
            else
                savepath = fs.combine("/usr/apps", itname)
            end
            return STDdownloadPrompt(item, itname, savepath)
        end,
        ["NovaHorizon"] = function(item)
            return STDdownloadPrompt(item, itname, "Nova/apps")
        end
    }
    return installers[OS](item)
end

local doCategoryMenu = function()
    local mcursor = catag -- (not term.isColor()) and (catag or 0) or false
    local cats,longth = renderCatagoryMenu(true,mcursor)
    local evt,butt,x,y
    while true do
        local evt,butt,x,y = os.pullEvent()
        if evt == "mouse_click" or (evt == "mouse_up" and y ~= 1) then
            doRedraw = true
            if y == 1 then
                catag = 0
                break
            else
                for a = 1, #cats do
                    if cats[a] == y and x <= longth then
                        catag = a
                        scroll = 1
                    end
                end
                break
            end
        elseif evt == "key" then
            if butt == keys.f1 then
                break
            elseif mcursor then
                if (butt == keys.up) and (mcursor > 0) then
                    mcursor = mcursor - 1
                    doRedraw = true
                elseif (butt == keys.down) and (mcursor < #std.storeCatagoryNames) then
                    mcursor = mcursor + 1
                    doRedraw = true
                elseif (butt == keys.enter) or (butt == keys.space) then
                    os.queueEvent("mouse_click",1,2,mcursor+1)
                end
            end
        end
        if doRedraw then
            renderCatagoryMenu(true,mcursor)
            doRedraw = false
        end
    end
    maxScroll = setMaxScroll(catag)
end

local doChannelMenu = function()
    local mcursor = 1 -- (not term.isColor()) and 1 or false
    local yposes, longth = renderChannelMenu(mcursor)
    local evt,butt,x,y
    while true do
        local evt,butt,x,y = os.pullEvent()
        if evt == "mouse_click" or (evt == "mouse_up" and y ~= 1) then
            if y == 1 then break else
                for a = 1, #yposes do
                    if (yposes[a][1] == y) and (x <= longth) then
                        if std.channel ~= yposes[a][2] then
                            std.prevChannel = std.channel
                            std.channel = yposes[a][2]
                            scroll = 1
                            std.getSTDList(std.prevChannel)
                        end
                        break
                    end
                end
                break
            end
        elseif evt == "key" then
            if butt == keys.f3 then
                break
            elseif mcursor then
                if (butt == keys.up) and (mcursor > 1) then
                    mcursor = mcursor - 1
                elseif (butt == keys.down) and (mcursor < #std.channelNames) then
                    mcursor = mcursor + 1
                elseif (butt == keys.enter) or (butt == keys.space) then
                    os.queueEvent("mouse_click",1,2,mcursor+1)
                end
            end
        end
        renderChannelMenu(mcursor)
    end
    maxScroll = setMaxScroll(catag)
end

local STDViewEntry = function(url)
    local contents, outcome = contentsFile(url)
    if not contents then
        term.write(outcome)
        sleep(0.6)
        return
    else
        strless(contents,palate.item.previewtxt,palate.item.previewbg)
    end
end

local doEverything = function() -- do I have to do EVERYTHING?
    if not std.storeURLs then
        pleaseWait()
        std.getSTDList(std.prevChannel)
    end
    maxScroll = setMaxScroll(catag)
    local yposes
    while true do
        if scroll > maxScroll then
            scroll = maxScroll
        end
        if scroll < 1 then
            scroll = 1
        end
        if (-1 + scroll % 4 ~= 0) and (not term.isColor()) then
            scroll = scroll - ((scroll-1) % 4)
        end
        local mcursor = (not term.isColor()) and 1 or false
        yposes = renderStore(std.storeURLs,catag,scroll,scrollX,fixDotY,not term.isColor())
        renderCatagoryMenu(false,mcursor)
        local evt = {getEvents("mouse_scroll","mouse_click","mouse_up","key","mouse_drag","char")}
        scr_x, scr_y = term.getSize()
        if evt[1] == "mouse_scroll" then
            if scroll+evt[2] >= 1 and scroll+evt[2] <= maxScroll then
                scroll = scroll+evt[2]
                doRedraw = true
            end
        elseif evt[1] == "mouse_click" and (evt[2] == 1) and (evt[4] <= scr_y) and (evt[4] >= 1) then --left click only! must deport right mouse buttons!
            if evt[3] == scr_x and evt[4] == math.floor(dotY) then
                doScrollBar = true
            end
            if evt[4] == 1 then
                if evt[3] >= scr_x-4 then
                    return cleanExit()
                else
                    if evt[3] >= 1 and evt[3] <= 6 then
                        doCategoryMenu()
                    elseif evt[3] >= 8 and evt[3] <= 14 then
                        doChannelMenu()
                    end
                end
            elseif yposes[evt[4]-1] and evt[3] ~= scr_x then
                local y = evt[4]-1
                local showPostURL = false
                local guud = yposes[y].title
                scrollX = 1
                while true do
                    if not guud then break end
                    local event,butt,cx,cy = renderStoreItem(yposes[y],showPostURL)
                    if event == "key" then
                        if butt == keys.q then
                            sleep(0)
                            break
                        elseif butt == keys.d then
                            sleep(0)
                            STDdownloadPrompt(yposes[y])
                        elseif butt == keys.v then
                            sleep(0)
                            STDViewEntry(yposes[y].url)
                        elseif (butt == keys.i) then
                            sleep(0)
                            customInstaller(std.currentOS, yposes[y])
                        end
                    elseif event == "mouse_click" then
                        if cy == scr_y then
                            if (cx < scr_x-7) or (cx > scr_x) then
                                if cx >= scr_x-11 and cx < scr_x-8 then
                                    term.setCursorPos(1,scr_y)
                                    bow()
                                    term.clearLine()
                                    if pocket or turtle then
                                        write("Args.: ")
                                    else
                                        write("Arguments:")
                                    end
                                    local arguments = explode(" ",funcread(nil,{},nil,true)) or {}
                                    term.setTextColor(colors.white)
                                    term.setBackgroundColor(colors.black)
                                    term.clear()
                                    term.setCursorPos(1,1)
                                    local oldcpath
                                    if shell then
                                        oldcpath = shell.dir()
                                        shell.setDir("")
                                    end
                                    if #arguments == 0 then
                                        runURL(yposes[y].url)
                                    else
                                        runURL(yposes[y].url,unpack(arguments))
                                    end
                                    if shell then
                                        shell.setDir(oldcpath or "")
                                    end
                                    sleep(0)
                                    write("[press a key]")
                                    os.pullEvent("key")
                                elseif cx >= scr_x-16 and cx < scr_x-12 then
                                    STDViewEntry(yposes[y].url)
                                end
                                sleep(0)
                                break
                            else
                                term.setCursorPos(1,scr_y)
                                bow()
                                term.clearLine()
                                customInstaller(std.currentOS, yposes[y])
                                break
                            end
                        end
                    end
                end
            end
        elseif evt[1] == "mouse_up" then
            doScrollBar = false
            fixDotY = nil
        elseif evt[1] == "mouse_drag" then
            if doScrollBar then
                local my = evt[4]
                if my > scr_y then -- operating systems might allow this to be true
                    my = scr_y
                elseif my < 1 then -- this too
                    my = 1
                end
                if my > 1 then
                    scroll = math.floor( (my-2)/(scr_y-2) * (maxScroll)) + 1
                    fixDotY = my
                end
            end
        elseif evt[1] == "key" then
            if evt[2] == keys.q then
                return cleanExit()
            elseif evt[2] == keys.down then
                scroll = scroll + 4
            elseif evt[2] == keys.up then
                scroll = scroll - 4
            elseif evt[2] == keys.pageDown then
                scroll = scroll + (scr_y-1)
            elseif evt[2] == keys.pageUp then
                scroll = scroll - (scr_y-1)
            elseif evt[2] == keys.home then
                scroll = 1
            elseif evt[2] == keys['end'] then
                scroll = maxScroll
            elseif evt[2] == keys.h then -- help screen!
                displayHelp(false)
            elseif evt[2] == keys.right then
                scrollX = scrollX + 1
            elseif evt[2] == keys.left then
                if scrollX > 1 then
                    scrollX = scrollX - 1
                end
            elseif (evt[2] == keys.numPadAdd) or (evt[2] == keys.rightBracket) then
                catag = catag + 1
                if catag > #std.storeCatagoryNames then
                    catag = 0
                end
                scroll = 1
                maxScroll = setMaxScroll(catag)
            elseif (evt[2] == keys.minus) or (evt[2] == keys.leftBracket) then
                catag = catag - 1
                if catag < 0 then
                    catag = #std.storeCatagoryNames
                end
                scroll = 1
                maxScroll = setMaxScroll(catag)
            elseif evt[2] == keys.f5 then
                pleaseWait()
                std.getSTDList(std.prevChannel)
            elseif (evt[2] == keys.f12) and (std.currentOS ~= "CraftOS") then
                local updateURL = std.updateURL[isBeta and "beta" or "stable"]
                getFile(shell.getRunningProgram(),updateURL)
                local flashes = {
                    colors.black,
                    colors.white,
                    colors.lightGray,
                    colors.gray,
                    colors.black,
                }
                for a = 1, #flashes do
                    term.setBackgroundColor(flashes[a])
                    term.clear()
                    sleep(0)
                end
                return
            elseif evt[2] == keys.f1 then
                doCategoryMenu()
            elseif evt[2] == keys.f or evt[2] == keys.f6 then
                -- runFile(std.stdList)
                findPrompt()
            elseif evt[2] == keys.f3 then
                doChannelMenu()
            end
        elseif evt[1] == "char" then
            if tonumber(evt[2]) then
                local a = tonumber(evt[2]) ~= "0" and tonumber(evt[2]) or "10"
                local b = (a*4)-1
                os.queueEvent("mouse_click",1,scr_x-3,b)
            end
        end
    end
end

if doDisplayTitle then
    displayTitle()
end

if std.storeURLs then std.storeURLs = getFindList("") end

local errorHandler = function()
    local success, message = pcall(doEverything)
    if success then
        return true
    end
    if message == "Terminated" then
        term.setBackgroundColor(colors.black)
        term.scroll(2)
        term.setCursorPos(1, scr_y-1)
        printError(message)
        return false, message
    else
        term.setBackgroundColor(colors.white)
        for a = 1, math.ceil(scr_y/2) do
            term.scroll(2)
        end
        term.setTextColor(colors.black)
        cprint("STD-GUI has encountered an error!",2)
        term.setCursorPos(1,4)
        term.setTextColor(term.isColor() and colors.red or colors.gray)
        print(message or "".."\n")
        term.setTextColor(colors.black)
        print(" Please contact LDDestroier/EldidiStroyrr on either the ComputerCraft forums, or through other means.")
        sleep(0.5)
        print("\nPush a key.")
        os.pullEvent("key")
        term.setCursorPos(1,scr_y)
        term.setBackgroundColor(colors.black)
        term.setTextColor(colors.white)
        term.clearLine()
        return false, message
    end
end

return errorHandler()