Add rows and cols to grid.vport

[okyeron]

Suggestion - modify grid.lua to store the number of rows and cols available in the vport object.

The following seems to work (on a quick test)

Grid.vport = {}
for i=1,4 do
  Grid.vport[i] = {
    name = "none",
    callbacks = {},
    index = 0,
    led = function() end,
    all = function() end,
    refresh = function() end,
    cols = 0,
    rows = 0,
    attached = false
  }
end

and

function Grid.new(id, serial, name, dev)
 local g = setmetatable({}, Grid)
 g.id = id
 g.serial = serial
 name = name .. " " .. serial
 while tab.contains(Grid.list,name) do
   name = name .. "+"
 end
 g.name = name
 g.dev = dev -- opaque pointer
 g.key = nil -- key event callback
 g.remove = nil -- device unplug callback
 g.rows = grid_rows(dev)
 g.cols = grid_cols(dev)
 g.ports = {} -- list of virtual ports this device is attached to

 -- autofill next postiion
 local connected = {}
 for i=1,4 do 
   table.insert(connected, Grid.vport[i].name) 
   table.insert(connected, Grid.vport[i].cols) 
   table.insert(connected, Grid.vport[i].rows) 
 end
 if not tab.contains(connected, name) then
   for i=1,4 do
     if Grid.vport[i].name == "none" then
       Grid.vport[i].name = name
       Grid.vport[i].cols = grid_cols(dev)
       Grid.vport[i].rows = grid_rows(dev)
       break
     end
   end
 end

 return g
end

[tehn]

want to submit a PR? this idea seems good

[okyeron]

#553