ASCII art build 4 ver 0.35 by Big SHiny Toys

--[[
    ASCII art editer
    by Big SHiny Toys
]]
------- varibals ---------
local curX,curY = 1,1
local winX,winY = term.getSize()
local picX,picY
local offsX,offsY = 0,0
local picT = {}
local MMSelset = 1
local ver = 0.35 -- lazy mans edition lol XD
local mode = 1  -- mode 1 is static mode 2 is moving
--------- end ------------
------- functions --------

local function dialogBox(mes,yes,no,ok,cancle,mes2)
    local indexer ={}
    local sel2 = 1
    local sel3 = 1
    local with,higth = 26,6
    local x13,y13 = term.getSize()
    local off1 = (x13/2)-(with/2)
    local off2 = (y13/2)-(higth/2)
    local barier = string.rep("-",with-2)
    local blank = string.rep(" ",with-2)
    term.setCursorPos(off1,off2)
    write("+"..barier.."+")
    term.setCursorPos(off1,off2+1)
    write("|"..blank.."|")
    term.setCursorPos(off1,off2+2)
    write("+"..barier.."+")
    term.setCursorPos(off1,off2+3)
    write("|"..blank.."|")
    term.setCursorPos(off1,off2+4)
    write("|"..blank.."|")
    term.setCursorPos(off1,off2+5)
    write("+"..barier.."+")
    if mes ~= nil then
        term.setCursorPos(off1+1,off2+1)
        write(mes)
    end
    if mes2 ~= nil then
        term.setCursorPos(off1+1,off2+3)
        write(mes2)
    end
    if yes == 1 then table.insert(indexer,1) end
    if no == 1 then table.insert(indexer,2) end
    if ok == 1 then table.insert(indexer,3) end
    if cancle == 1 then table.insert(indexer,4) end

    sel2 = sel3
    if sel3 > table.maxn(indexer) then
        sel3 = table.maxn(indexer)
        sel2 = indexer[sel3]
    end
    if sel3 < 1 then
        sel3 = 1
        sel2 = indexer[1]
    end
    sel2 = indexer[1]
    while true do
        if yes == 1 then
            term.setCursorPos(off1+1,off2+4)
            if sel2 == 1 then
                write("[YES]")
            else
                write(" YES ")
            end
        end
        if no == 1 then
            term.setCursorPos(off1+7,off2+4)
            if sel2 == 2 then
                write("[NO]")
            else
                write(" NO ")
            end
        end
        if ok == 1 then
            term.setCursorPos(off1+12,off2+4)
            if sel2 == 3 then
                write("[OK]")
            else
                write(" OK ")
            end
        end
        if cancle == 1 then
            term.setCursorPos(off1+17,off2+4)
            if sel2 == 4 then
                write("[CANCLE]")
            else
                write(" CANCLE ")
            end
        end
            e,e1,e2,e3,e4,e5 = os.pullEvent()
        if e == "key" then
            if e1 == 203 then -- left
                sel3 = sel3-1
            end
            if e1 == 205 then -- right
                sel3 = sel3+1
            end
            if e1 == 28 then -- enter
                if indexer[sel3] == 1 then return true end
                if indexer[sel3] == 2 then return false end
                return indexer[sel3]
            end
        end
        sel2 = sel3
        if sel3 > table.maxn(indexer) then
            sel3 = table.maxn(indexer)
            sel2 = indexer[sel3]
        end
        if sel3 < 1 then
            sel3 = 1
            sel2 = indexer[1]
        end
    end
end

local function help()
    term.clear()
    term.setCursorPos(1,1)
    write([[Use the direction keys to navigate menues and select size of new picture.
To load a new picture use the up down keys to select the right file. Folders are represented by [] pressing Enter will open that folder. Using the \\ option will return you one directry back. Ounce selected you will be promped to confirm use keys to and enter to make elsection. To exit file selection without selecting a file press Ctrl key.
when the new file is made or loaded the screen will clear and the  direction keys will move the cursor around the screen. pressing and ASCII charicter like "k" or "^" will make it apear on screen. the picture can be saved by pressing Ctrl and selecting save. you will need to select a file to over write or select the blank space bellow the list and use Tab to enyer a file name.
That is about it have fun with ASCII art.
    Press Enter to return.]])
    local event,var
    while true do
        event,var = os.pullEvent()
        if event == "key" and var == 28 then
            return
        end
    end
end

local function redrawfull()
    term.setCursorBlink(false)
    term.clear()
    winX,winY = term.getSize()
    for i = 1 , winX - 2 do
        for v = 1 , winY - 1 do
            term.setCursorPos(i,v)
            if picT[i+offsX] == nil then
            elseif picT[i+offsX][v+offsY] ~= nil then
                write(picT[i+offsX][v+offsY])
            end
        end
    end
    local scBar = math.floor(((offsY+1)/(picY-winY+1))*(winY-1))
    for i = 1,winY-1 do
        term.setCursorPos(winX-1,i)
        if scBar == i then
            write("#")
        else
            write("|")
        end
    end
    scBar = math.floor(((offsX+1)/(picX-winX+2))*(winX-2))
    for i = 1,winX-2 do
        term.setCursorPos(i,winY)
        if scBar == i then
            write("#")
        else
            write("-")
        end
    end
    term.setCursorBlink(true)
end

local function CustomExit()
    term.clear()
    winX,winY = term.getSize()
    term.setCursorPos((winX/2)-(string.len("Thank you for trying ASCII art")/2),(winY/2)-1)
    write("Thank you for trying ASCII art")
    term.setCursorPos((winX/2)-(string.len("Idear from Troll")/2),(winY/2))
    write("Idear from Troll")
    term.setCursorPos((winX/2)-(string.len("By Big SHiny Toys")/2),(winY/2)+1)
    write("By Big SHiny Toys")
    sleep(2)
    term.clear()
    term.setCursorPos(1,1)
    error()
end

local function fileList(mode)
    local parth = {}
    local sParth
    local list = {}
    local x12,y12 = term.getSize()
    local sel = 3
    local curent
    local offset = 0
    local flot = 0
    local fileName

    local function pointer() -- yes it points lol XD
        if sel > y12-2 then
            sel = y12-2
            offset = offset+1
        end

        if sel < 3 then
            sel = 3
            offset = offset-1
        end
        if offset < 0 then offset = 0 end
        term.setCursorPos(1,sel)
        write(">")
    end

    local function top()
        sParth = [[\]]
        for i = 1,table.maxn(parth) do
            sParth = sParth..parth[i]..[[\]]
        end
        list = fs.list(sParth)
        term.setCursorPos(1,1)
        write("Dir: "..sParth)
        local barier = string.rep("-",x12-2)
        term.setCursorPos(1,2)
        write(barier)
    end

    local function middle()
        local counter
        local specal
        local folder = {}
        local file = {}
        local this = nil
        for i = 1, table.maxn(list) do
            if fs.isDir(sParth..list[i]) then
                table.insert(folder,list[i])
            else
                table.insert(file,list[i])
            end
        end
        table.sort(folder)
        table.sort(file)
        table.insert(folder,1,[[\\]])
        if offset > table.maxn(folder)+table.maxn(file)- (y12-5) then
        offset = table.maxn(folder)+table.maxn(file)- (y12-5)
        end
        if offset < 0 then
        offset = 0
        end
        for i = 1 , y12-4 do
            if i+offset < table.maxn(folder)+1 then
                term.setCursorPos(3,i+2)
                this = folder[i+offset]
                write("[] "..folder[i+offset])
                counter = i
            else
                if counter == nil then
                    counter = 0
                    flot = offset - table.maxn(folder)
                end
                if i-counter+flot < table.maxn(file)+1 then
                term.setCursorPos(3,i+2)
                this = file[i-counter+flot]
                write("   "..file[i-counter+flot])
                end
            end
            if i+2 == sel then curent = this
            end
            this = nil
        end
    end

    local function bottom()
        local barier = string.rep("-",x12-2)
        term.setCursorPos(1,y12-1)
        write(barier)
        term.setCursorPos(1,y12)
        write("File Name: "..tostring(fileName))
        term.setCursorPos(x12-string.len(tostring(curent))-1,y12)
        write(tostring(curent))
    end

    while true do
        term.clear()
        top()
        pointer()
        middle()
        bottom()
        e,e1,e2,e3,e4,e5 = os.pullEvent()
        if e == "key" then
            if e1 == 200 then -- up key
                sel = sel-1
            end
            if e1 == 208 then -- down key
                sel = sel+1
            end
            if e1 == 15 then -- tab
                term.setCursorPos(1,y12)
                term.clearLine()
                write("File Name: ")
                term.setCursorPos(12,y12)
                fileName = io.read()
                specal = true
            end
            if e1 == 29 then -- Ctrl
                if dialogBox("Message",1,1,0,0,"Exit file select") then
                    return
                end
            end
            if e1 == 28 or specal then -- enter key
                if curent == [[\\]] then
                    table.remove(parth)
                else
                    if curent ~= nil then
                        if fs.isDir(sParth..curent) then
                            table.insert(parth,curent)
                        end
                    end
                    if mode == "save" then
                        if fs.isDir(sParth..tostring(curent)) or curent == [[\\]] then
                        else
                            if fileName == nil and curent == nil then
                                    dialogBox("Enter a Name",0,0,1,0,"press Tab to add name")
                            else
                                if fs.exists(sParth..tostring(curent)) then
                                    if fs.isReadOnly(sParth..tostring(curent)) then
                                            dialogBox("Error",0,0,1,0,"File is read only")
                                        else
                                        if dialogBox("Confirm OVER WRITE",1,1,0,0,"Save as:"..sParth..curent) then
                                            return sParth..curent
                                        end
                                    end
                                else
                                    if dialogBox("Confirm",1,1,0,0,"Save as:"..sParth..fileName) then
                                        return sParth..fileName
                                    end
                                end
                            end
                        end
                    end
                    if mode == "load" then
                        if curent ~= nil then
                            if fs.isDir(sParth..curent) then
                                else
                                if dialogBox("confirm",1,1,0,0,"load :"..sParth..curent) then
                                    return sParth..curent
                                else
                                end
                            end
                        else
                        dialogBox("Error",0,0,1,0,"No file selected")
                        end
                    end
                end
                specal = false
            end
        end
    end
end

local function clear()
    local size = table.maxn(picT)
    if size == 0 then
        return
    end
    local size2 = table.maxn(picT[1])
    for i = 1, size do
        for b = 1, size2 do
            picT[i][b] = nil
        end
        table.remove(picT[i])
    end
end

local function specialSave() -- exports image
    local A = string.char(91)
    local B = string.char(93)
    local D = ","
    local C = "}"
    local fileLocation = fileList("save")
    local contence = ""
    if fileLocation ~= nil then
        local x = picX
        local y = picY
            local builder = [[local tImage = {]]
            for v = 1 , y do
                for i = 1 , x do
                    contence = contence..picT[i][v]
                end
                if v == y then
                    builder = builder..A..A..contence..B..B..C.."\n"
                else
                    builder = builder..A..A..contence..B..B..D.."\n"
                end
                contence = ""
            end
        local file = fs.open(fileLocation,"w")
        file.write(builder)
        file.close()
        contence = ""
        dialogBox("Mesage",0,0,1,0,"Save Completed")
        return true
    end
    dialogBox("Error",0,0,1,0,"Failed to save")
    return false
end

local function save() -- come up with format add that
    local fileLocation = fileList("save")
    local contence = ""
    if fileLocation ~= nil then
        local x = picX
        local y = picY
            for v = 1 , y do
                for i = 1 , x do
                    contence = contence..picT[i][v]
                end
                if v == y then
                else
                    contence = contence.."\n"
                end
            end
        local file = fs.open(fileLocation,"w")
        file.write(contence)
        file.close()
        contence = ""
        dialogBox("Mesage",0,0,1,0,"Save Completed")
        return true
    end
    dialogBox("Error",0,0,1,0,"Failed to save")
    return false
end

local function load() -- come up with format add that
    local fileLocation = fileList("load")
    local contence = {}
    local sLine
    local allGood = true
    if fileLocation ~= nil then
        if fs.exists(fileLocation) then
            local file = io.open( fileLocation, "r" )
            sLine = file:read()
            table.insert( contence, sLine )
            sLine = file:read()
            while sLine do
                if string.len(tostring(contence[1])) == string.len(tostring(sLine)) then
                    table.insert( contence, sLine )
                else
                    allGood = false
                    break
                end
                sLine = file:read()
                if sLine == nil then break end
            end
        file:close()
        end
        if allGood then
            clear()
            local x = string.len(contence[1])
            local y = table.maxn(contence)
            picX,picY = x,y
            for i = 1 , x do
                picT[i] = {}
                for v = 1 , y do
                    picT[i][v] = string.sub(contence[v],i,i)
                end
            end
            dialogBox("Mesage",0,0,1,0,"File loaded")
            return true
        else
            dialogBox("Error",0,0,1,0,"Not ACSCII art file")
            return false
        end
    end
end

local function Newgrid(x,y)
    for i = 1 , x do
        picT[i] = {}
        for v = 1 , y do
            picT[i][v] = " "
        end
    end
end

local function newSelect()
    local xTemp,yTemp = 1,1
    local pos = 1
    local sizex,sizey = term.getSize()
    while true do
        if pos > 4 then pos = 1 end
        if pos < 1 then pos = 4 end
        --if xTemp > sizex-2 then xTemp = sizex-2 end
        --if xTemp < 1 then xTemp = 1 end
        --if yTemp > sizey-2 then yTemp = sizey-2 end
        --if yTemp < 1 then yTemp = 1 end
        term.clear()
        term.setCursorPos(1,1)
        write("Please select size")
        term.setCursorPos(1,3)
        write("Size X : ")
        if pos == 1 then write("< "..xTemp.." > ".."Recomended: "..tostring(sizex-2))
        else
            write("  "..xTemp.."   ".."Recomended: "..tostring(sizex-2))
        end
        term.setCursorPos(1,4)
        write("Size Y : ")
        if pos == 2 then write("< "..yTemp.." > ".."Recomended: "..tostring(sizey-2))
        else
            write("  "..yTemp.."   ".."Recomended: "..tostring(sizey-2))
        end
        term.setCursorPos(1,5)
        if pos == 3 then write(" [Create] ")
        else
            write("  Create  ")
        end
        term.setCursorPos(1,6)
        if pos == 4 then write(" [Return] ")
        else
            write("  Return  ")
        end
        while true do
            e,e1 = os.pullEvent()
            if e == "key" then
                if e1 == 200 then -- up
                    pos = pos-1
                    break
                end
                if e1 == 208 then -- down
                    pos = pos+1
                    break
                end
                if e1 == 203 then -- left
                    if pos == 1 then
                        xTemp = xTemp - 1
                    end
                    if pos == 2 then
                        yTemp = yTemp - 1
                    end
                    break
                end
                if e1 == 205 then -- right
                    if pos == 1 then
                        xTemp = xTemp + 1
                    end
                    if pos == 2 then
                        yTemp = yTemp + 1
                    end
                    break
                end
                if e1 == 28 then -- enter
                    if pos == 3 then
                        Newgrid(xTemp,yTemp)
                        picX,picY = xTemp,yTemp
                        return true
                    end
                    if pos == 4 then
                        return false
                    end
                end
            end
        end
    end
end

local function clearGrid()
    local x = table.maxn(picT)
    local y = table.maxn(picT[1])
    for i = 1 , x do
        for v = 1 , y do
            picT[i][v] = " "
        end
    end
end

local function menue2() -- save - load - new - exit 6 lines
    local crnX,crnY = term.getSize()
    local selected = 6
    while true do
        if selected > 7 then selected = 1
        end
        if selected < 1 then selected = 7
        end
        term.setCursorPos(crnX-9,crnY-8)
        write("+-------+")
        term.setCursorPos(crnX-9,crnY-7)
        if selected == 6 then write("|> Mod "..mode.."|") else write("|  Mod "..mode.."|") end --new
        term.setCursorPos(crnX-9,crnY-6)
        if selected == 7 then write("|> EXPO |") else write("|  EXPO |") end
        term.setCursorPos(crnX-9,crnY-5)
        if selected == 1 then write("|> Save |") else write("|  Save |") end
        term.setCursorPos(crnX-9,crnY-4)
        if selected == 2 then write("|> Load |") else write("|  Load |") end
        term.setCursorPos(crnX-9,crnY-3)
        if selected == 3 then write("|> New  |") else write("|  New  |") end
        term.setCursorPos(crnX-9,crnY-2)
        if selected == 4 then write("|> Clear|") else write("|  Clear|") end
        term.setCursorPos(crnX-9,crnY-1)
        if selected == 5 then write("|> Exit |") else write("|  Exit |") end
        term.setCursorPos(crnX-9,crnY)
        write("+-------+")
        while true do
            e,e1,e2,e3,e4,e5 = os.pullEvent()
            if e == "key" then
                if e1 == 200 then -- up key
                    selected = selected-1
                    break
                end
                if e1 == 208 then -- down key
                    selected = selected+1
                    break
                end
                if e1 == 203 then -- left key
                    if selected == 6 then
                        mode = 1
                    end
                    break
                end
                if e1 == 205 then -- right key
                    if selected == 6 then
                        mode = 2
                    end
                    break
                end
                if e1 == 29 then -- Ctrl
                    return
                end
                if e1 == 28 then -- enter key
                    if selected == 3 then --  new
                        if newSelect() then
                            return
                        else
                            break
                        end
                    end
                    if selected == 6 then -- new
                        return
                    end
                    if selected == 5 then
                        CustomExit()
                        return
                    end
                    if selected == 4 then
                        clearGrid()
                        return
                    end
                    if selected == 1 then -- neds work
                        save()
                        return
                    end
                    if selected == 2 then -- neds work
                        load()
                        return
                    end
                    if selected == 7 then
                        specialSave()
                        return
                    end
                end
            end
        end
    end
end

---------- end -----------

------- Main Menue -------
-- load - new - help - exit
local function Mmenue()
    MMSelset = 1
    local s1 = "ASCII Art ver "..ver
    local s2 = "--- Main Menue ---"
    while true do
        if MMSelset > 4 then MMSelset = 1
        end
        if MMSelset < 1 then MMSelset = 4
        end
        winX,winY = term.getSize()
        term.clear()
        term.setCursorPos((winX/2)-(string.len(s1)/2),1)
        write(s1)
        term.setCursorPos((winX/2)-(string.len(s2)/2),3)
        write(s2)
        term.setCursorPos((winX/2)-(string.len("  Load  ")/2),5)
        if MMSelset == 1 then
            write("> Load <")
        else
            write("  Load  ")
        end
        term.setCursorPos((winX/2)-(string.len("  new  ")/2),6)
        if MMSelset == 2 then
            write("> New <")
        else
            write("  New  ")
        end
        term.setCursorPos((winX/2)-(string.len("  Help  ")/2),7)
        if MMSelset == 3 then
            write("> Help <")
        else
            write("  Help  ")
        end
        term.setCursorPos((winX/2)-(string.len("  Exit  ")/2),8)
        if MMSelset == 4 then
            write("> Exit <")
        else
            write("  Exit  ")
        end

        while true do
            e,e1,e2,e3,e4,e5 = os.pullEvent()
            if e == "key" then
                if e1 == 200 then -- up key
                    MMSelset = MMSelset-1
                    break
                end
                if e1 == 208 then -- down key
                    MMSelset = MMSelset+1
                    break
                end
                if e1 == 28 then -- enter key
                    if MMSelset == 1 then
                        if load() then
                            return
                        else
                            break
                        end
                    end

                    if MMSelset == 2 then -- new
                        if newSelect() then
                            return
                        else
                            break
                        end
                    end

                    if MMSelset == 3 then -- will be help section
                        help()
                        break
                    end

                    if MMSelset == 4 then
                        CustomExit()
                    end
                end
            end
        end
    end
end
---------- end -----------

------- Main loop --------
Mmenue()
redrawfull()
curX,curY = 1,1
term.setCursorBlink(true)
term.setCursorPos(curX,curY)
while true do
    e,e1,e2,e3,e4,e5 = os.pullEvent()
    if e == "key" then
        if e1 == 200 then -- up key
            curY = curY -1
        end
        if e1 == 29 then -- Ctrl key
            term.setCursorBlink(false)
            menue2()
            redrawfull()
            term.setCursorPos(curX,curY)
            term.setCursorBlink(true)
        end
        if e1 == 208 then -- down key
            curY = curY +1
        end
        if e1 == 203 then -- left key
            curX = curX-1
        end
        if e1 == 205 then -- right key
            curX = curX+1
        end
        if e1 == 14 then -- backspace
            if mode == 2 then
                if curX-1 >= 1 then
                    curX = curX-1
                else
                    if curY-1 <= 1 then
                        curX,curY = picX,curY-1
                    end
                end
                picT[curX][curY] = " "
                term.setCursorPos(curX,curY)
                write(picT[curX][curY])
            end
        end

        if curX > winX-2 then
            curX = winX-2
            offsX = offsX+1
            redrawfull()
        elseif curX < offsX then
            curX = 1
            offsX = offsX-1
            redrawfull()
        end

        term.setCursorPos(curX,curY)

        if curX > picX-offsX-1 then
            curX = picX-offsX
        elseif curX < 1 then
            curX = 1
        end

        term.setCursorPos(curX,curY)

        if curY > winY-1 then
            curY = winY -1
            offsY = offsY+1
            redrawfull()
        elseif curY < offsY then
            curY = 1
            offsY = offsY-1
            redrawfull()
        end

        term.setCursorPos(curX,curY)

        if curY > picY-offsY-1 then
            curY = picY-offsY
        elseif curY < 1 then
            curY = 1
        end

        term.setCursorPos(curX,curY)
    end
    if e == "char" then
        picT[curX+offsX][curY+offsY] = e1
        write(picT[curX+offsX][curY+offsY])
        if mode == 1 then
        end
        if mode == 2 then
            if curX+1 > picX then
                if curY+1 <= picY then
                    curX,curY = 1,curY+1
                end
            else
                curX,curY = curX+1,curY
            end
        end
        term.setCursorPos(curX,curY)
    end
end
---------- end -----------