Updated WebApi with Graphics Buffer

local page = {}

function page.getPos(self)
    for y=1,self.h do
        for x=1,self.w do
            if self[x][y][1] == nil then
                return x,y
            end
        end
    end
end

function page.draw(self,words,x,y,txt,back)
    txt = txt or self.deftext
    back = back or self.defback
    for i = 0,#words-1 do
        if not (x + i > self.w) then
            self[x + i][y] = {words:sub(i+1,i+1),txt,back}
        end
    end
    if x + #words > self.w then
        self.x = 1
        self.y = y + 1
    else
        self.x = x + #words
        self.y = y
    end
end

function page.write(self,words,txt,back)
    local x,y = self.x,self.y
    txt = txt or self.deftxt
    back = back or self.defback
    for i = 0,#words-1 do
        if not (x + i > self.w) then
            self[x + i][y] = {words:sub(i+1,i+1),txt,back}
        end
    end
    if x + #words > self.w then
        self.x = 1
        self.y = y + 1
    else
        self.x = x + #words
        self.y = y
    end
end

function page.print(self,words,txt,back)
    local x,y = self:getPos()
    txt = txt or self.deftxt
    back = back or self.defback
    for i = 0,#words-1 do
        if not (x + i > self.w) then
            self[x + i][y] = {words:sub(i+1,i+1),txt,back}
        end
    end
    self.x = 1
    self.y = y + 1
end


function page.render(self,w,h)
    term.setBackgroundColor(self.defback)
    term.clear()
    local txtcol = self.deftxt
    local backcol = self.defback
    if not (w and h) then
        w,h = term.getSize()
    end
    for y = 1,h do
        for x = 1,w do
            if self[x][y][1] then
                term.setCursorPos(x,y)
                if self[x][y][2] ~= txtcol then
                    term.setTextColor(self[x][y][2])
                    txtcol = self[x][y][2]
                end
                if self[x][y][3] ~= backcol then
                    term.setBackgroundColor(self[x][y][3])
                    txtcol = self[x][y][3]
                end
                write(self[x][y][1])
            end
        end
    end
end

function createPage(w,h)
    if not (w and h) then
        w,h = term.getSize()
    end
    local buffer = {}
    for x = 1,w do
        buffer[x] = {}
        for y = 1,h do
            buffer[x][y] = {}
        end
    end
    buffer.x = 1
    buffer.y = 1
    buffer.w = w
    buffer.h = h
    buffer.deftxt = colors.white
    buffer.defback = colors.black
    for i,v in pairs(page) do
        buffer[i] = v
    end
    return buffer
end