Printerm API

local function stub() return end
local function stubonearg(a) return end

function getTerm(sSide)
    local printer = peripheral.wrap(sSide)
	local onPage = false
    if not printer then error("PrintermAPI: No printer on side "..sSide) end
    local tx,ty = 1,1
    local function checkStatus()
        if printer.getPaperLevel()==0 then error("PrintermAPI: No paper in the printer!",0) end
        if printer.getInkLevel()==0 then error("PrintermAPI: No ink in the printer",0) end
    end
    checkStatus()
    local ret = {}
    for k,v in pairs(printer) do
        ret[k] = v
    end
	ret.newPage = function()
		onPage = true
		printer.newPage()
	end
	ret.endPage = function()
		onPage = false
		printer.endPage()
	end
    ret.write = function(s)
		if not onPage then
			ret.newPage()
		end
        checkStatus()
        printer.write(s)
        tx,ty = printer.getCursorPos()
    end
    ret.blit = function(s,tc,bc)
        ret.write(s)
    end
    ret.clear = stub
    ret.clearLine = stub
    ret.setCursorBlink = stub
    ret.isColor = function() return false end
    ret.getSize = printer.getPageSize
    ret.scroll = stubonearg
    ret.setTextColor = stubonearg
    ret.getTextColor = function() return colors.black end
    ret.setBackgroundColor = stubonearg
    ret.getBackgroundColor = function() return colors.white end
	ret.setTextColour = stubonearg
    ret.getTextColour = function() return colors.black end
    ret.setBackgroundColour = stubonearg
    ret.getBackgroundColour = function() return colors.white end
    return ret
end