Sync API

-- Sync API
-- Terminal-Monitor Synchronization
-- by MysticT

local tApi = {}
local tTargets = {}
local tMonitors = {}

local bMax = false
local nWidth, nHeight = 0, 0
local nCursorX, nCursorY = 1, 1
local bBlink = false
local bgColor = colors.black
local txtColor = colors.white

local function resize()
    local w, h
    for target in pairs(tTargets) do
        local _w, _h = target.getSize()
        if bMax then
            if (w == nil or h == nil) or (_w * _h) > (w * h) then
                w, h = _w, _h
            end
        else
            if (w == nil or h == nil) or (_w * _h) < (w * h) then
                w, h = _w, _h
            end
        end
    end
    if w and h then
        nWidth = w
        nHeight = h
    end
end

local function call(func, ...)
    for target in pairs(tTargets) do
        target[func](...)
    end
end

-- Sync Functions

function tApi.getSize()
    return nWidth, nHeight
end

function tApi.getCursorPos()
    return nCursorX, nCursorY
end

function tApi.setCursorPos(x, y)
    nCursorX, nCursorY = x, y
    call("setCursorPos", x, y)
end

function tApi.setCursorBlink(b)
    bBlink = b
    call("setCursorBlink", b)
end

function tApi.clear()
    call("clear")
end

function tApi.clearLine()
    call("clearLine")
end

function tApi.write(text)
    call("write", text)
    nCursorX = nCursorX + #text
end

function tApi.scroll(n)
    call("scroll", n)
end

function tApi.isColor()
    for target in pairs(tTargets) do
        if not target.isColor() then
            return false
        end
    end
    return true
end
tApi.isColour = tApi.isColor

function tApi.setBackgroundColor(c)
    bgColor = c
    call("setBackgroundColor", c)
end
tApi.setBackgroundColour = tApi.setBackgroundColor

function tApi.setTextColor(c)
    txtColor = c
    call("setTextColor", c)
end
tApi.setTextColour = tApi.setTextColor

-- API Functions

function addTarget(target)
    tTargets[target] = true
    resize()
    target.setCursorPos(nCursorX, nCursorY)
    target.setCursorBlink(bBlink)
    target.setBackgroundColor(bgColor)
    target.setTextColor(txtColor)
end

function removeTarget(target)
    tTargets[target] = nil
end

function addMonitor(sSide)
    if tMonitors[sSide] then
        return true
    end
    if peripheral.isPresent(sSide) and peripheral.getType(sSide) == "monitor" then
        local mon = peripheral.wrap(sSide)
        tMonitors[sSide] = mon
        addTarget(mon)
        return true
    end
    return false
end

function removeMonitor(sSide)
    if tMonitors[sSide] then
        removeTarget(tMonitors[sSide])
        tMonitors[sSide] = nil
    end
end

function addMonitors()
    for _,s in ipairs(rs.getSides()) do
        addMonitor(s)
    end
end

function removeMonitors()
    for _,s in ipairs(rs.getSides()) do
        removeMonitor(s)
    end
end

function useMaxSize(b)
    if b ~= bMax then
        bMax = b
        resize()
    end
end

function redirect(bAddTerm)
    if bAddTerm then
        addTarget(term.native or term)
    end
    term.redirect(tApi)
end

function restore()
    term.restore()
end