KekApi

-- KekApi (1.2)


function centerText (text)
 local w, h = term.getSize()
 term.setCursorPos(math.floor(w / 2 - text:len() / 2 + .5), math.floor(h / 2 + .5))
 write(text)
end

function centerPrint (text)
 local textLen = string.len(text)
 local screenW,_ = term.getSize()
 local xCoords = tonumber(math.ceil((screenW / 2) - (textLen / 2)))
 local _,termY = term.getCursorPos()
 term.setCursorPos(xCoords,termY)
 print(text)
 return xCoords
end

function writeLine ()
 term.write("--------------------------------------------------")
end

function slowCenterPrint (text, time)
 local textLen = string.len(text)
 local screenW,_ = term.getSize()
 local xCoords = tonumber(math.ceil((screenW / 2) - (textLen / 2))) -- Da Ba Dee xD
 local _,termY = term.getCursorPos()
 term.setCursorPos(xCoords,termY)
 textutils.slowWrite(text, time)
 return xCoords
end

function drawMenu (tab1, x, y)
 if y == nil or x == nil then
  printError("podaj x i y dla menu!")
 end
 a = 0
 colorOld = term.getBackgroundColor()
 wbr = 1
 while true do
  w,h = term.getSize()
  if #tab1 < 10 then
   for i = 1, #tab1 do
    term.setCursorPos(x,y + i - 1)
    if i == wbr then
     term.setBackgroundColor(colors.gray)
    else
     term.setBackgroundColor(colorOld)
    end
   term.write(tab1[i])
   end
  elseif #tab1 > 10 or #tab1 == 10 then
   for i = 1, 10 do
    if i == wbr then
     term.setBackgroundColor(colors.gray)
    else
     term.setBackgroundColor(colorOld)
    end
    if wbr == 9 or wbr > 9 then
     i = wbr
     i = i - 1
    end
    term.setCursorPos(x,y + i - 1)
    term.clearLine()
    term.write(tab1[i])
   end
  end
  event, key = os.pullEvent("key")
  if key == keys.down and wbr < #tab1 then
   wbr = wbr + 1
  end
  if key == keys.up and wbr > 1 then
   wbr = wbr - 1
  end
  if key == keys.enter then
   break
  end
 end
 term.setBackgroundColor(colorOld)
 return wbr
end