lock to menu mode if script does not define redraw, go to params (#619)

lua/menu.lua

@@ -47,6 +47,7 @@ menu.mode = false
 menu.page = pHOME
 menu.alt = false
 menu.scripterror = false
+menu.locked = true
 menu.errormsg = ""
 
 
@@ -84,6 +85,7 @@ norns.scripterror = function(msg)
   print("### SCRIPT ERROR: "..msg)
   menu.errormsg = msg
   menu.scripterror = true
+  menu.locked = true
   menu.set_page(pHOME)
   menu.set_mode(true)
 end
@@ -93,7 +95,13 @@ norns.init_done = function(status)
   if status == true then
     menu.scripterror = false
     m.params.pos = 0
-    menu.set_mode(false)
+    if norns.script.nointerface == true then
+      menu.locked = true
+      menu.set_page(pPARAMS)
+    else
+      menu.locked = false
+      menu.set_mode(false)
+    end
   end
   m.params.init_map()
   m.params.read(norns.state.folder_name..".pmap")
@@ -119,7 +127,7 @@ norns.key = function(n, z)
       t:start()
     elseif z == 0 and pending == true then
       menu.alt = false
-      if menu.mode == true and menu.scripterror == false then
+      if menu.mode == true and menu.locked == false then
         menu.set_mode(false)
       else menu.set_mode(true) end
       t:stop()
@@ -523,7 +531,7 @@ m.key[pSELECT] = function(n,z)
   -- back
   if n==2 and z==1 then
     if m.sel.depth > 0 then
-      print('back')
+      --print('back')
       m.sel.folders[m.sel.depth] = nil
       m.sel.depth = m.sel.depth - 1
       -- FIXME return to folder position

lua/script.lua

@@ -102,6 +102,7 @@ Script.load = function(filename)
       norns.state.folder_name = string.gsub(filename,'.lua','') -- store name
       norns.state.name = norns.state.folder_name:match("[^/]*$") -- strip path from name
       norns.state.save() -- remember this script for next launch
+      norns.script.nointerface = redraw == norns.blank -- check if redraw is present
       norns.script.redraw = redraw -- store redraw function for context switching
       redraw = norns.none -- block redraw until Script.init
       Script.run() -- load engine then run script-specified init function