Gracefully handle small terminal

Also fuck it, global terminal size again

mess/tmpc.lua

@@ -27,6 +27,36 @@ settings.define("mplayer.colors.status", {
     default = 0x80EF80, -- #80EF80
     type = number
 })
+
+local tw, th = term.getSize()
+
+os.queueEvent("dummy")
+while tw < 20 or th < 10 do
+    local ev = { os.pullEvent() }
+    term.clear()
+    term.setCursorPos(1, 1)
+    printError("Too small: " .. tw .. "x" .. th .. " < 20x10")
+    printError("Q to exit")
+    printError("Y to ignore")
+
+    local setTextScale = term.current().setTextScale
+    if setTextScale ~= nil then
+        printError("S to try rescaling")
+    end
+    printError("I'll wait while you're adding more")
+
+    if ev[1] == "term_resize" then
+        tw, th = term.getSize()
+    elseif ev[1] == "key" and ev[2] == keys.s and setTextScale ~= nil then
+        setTextScale(0.5)
+    elseif ev[1] == "key" and ev[2] == keys.y then
+        break
+    elseif ev[1] == "key" and ev[2] == keys.q then
+        return
+    end
+end
+
+
 local drive = peripheral.find("tape_drive")
 if not drive then
     printError("No drive found, starting in dummy mode")
@@ -146,7 +176,6 @@ local mplayer = {
             title = "Help",
             scroll = 0,
             render = function(self)
-                local tw, th = term.getSize()
                 for i = 1, th - 3 do
                     local line = help[i + self.screens[1].scroll] or "~"
                     term.setCursorPos(1, i + 1)
@@ -165,7 +194,6 @@ local mplayer = {
                 end
             end,
             handleKey = function(self, key, repeating)
-                local _, th = term.getSize()
                 if key == keys.down or key == keys.j then
                     self.screens[1].handleScroll(self, 1)
                 elseif key == keys.up or key == keys.k then
@@ -177,7 +205,6 @@ local mplayer = {
                 end
             end,
             handleScroll = function(self, direction, x, y)
-                local _, th = term.getSize()
                 self.screens[1].scroll = math.max(0, math.min(th - 1, self.screens[1].scroll + direction))
             end,
         },
@@ -187,7 +214,6 @@ local mplayer = {
             cursor = 1,
             textScroll = 0,
             render = function(self)
-                local tw, th = term.getSize()
                 for i = 1, th - 3 do
                     local song = self.songs[i + self.screens[2].scroll]
                     local isCurrent = (i + self.screens[2].scroll) == self.currentSong
@@ -214,7 +240,6 @@ local mplayer = {
                 end
             end,
             handleKey = function(self, key, repeating)
-                local _, th = term.getSize()
                 if key == keys.down or key == keys.j then
                     self.screens[2].handleScroll(self, 1)
                 elseif key == keys.up or key == keys.k then
@@ -231,7 +256,6 @@ local mplayer = {
                 end
             end,
             handleScroll = function(self, direction, x, y)
-                local _, th = term.getSize()
                 self.screens[2].cursor = math.max(1, math.min(#self.songs, self.screens[2].cursor + direction))
                 if self.screens[2].scroll + 1 > self.screens[2].cursor then
                     self.screens[2].scroll = self.screens[2].cursor - 1
@@ -252,7 +276,6 @@ local mplayer = {
                 term.write(string.format("opt = %d, scroll = %d", self.screens[3].cursor, self.screens[3].scroll))
             end,
             handleKey = function(self, key, repeating)
-                local _, th = term.getSize()
                 if key == keys.down or key == keys.j then
                     self.screens[3].handleScroll(self, 1)
                 elseif key == keys.up or key == keys.k then
@@ -264,7 +287,6 @@ local mplayer = {
                 end
             end,
             handleScroll = function(self, direction, x, y)
-                local _, th = term.getSize()
                 self.screens[3].cursor = math.max(1, math.min(20, self.screens[3].cursor + direction))
                 if self.screens[3].scroll + 1 > self.screens[3].cursor then
                     self.screens[3].scroll = self.screens[3].cursor - 1
@@ -293,8 +315,6 @@ term.clear()
 parallel.waitForAny(
 function()
     while true do
-        local tw, th = term.getSize()
-
         -- Current screen
         term.setCursorPos(1, 2)
         mplayer.screens[mplayer.currentScreen].render(mplayer)
@@ -359,7 +379,6 @@ function()
     local pretty = require("cc.pretty")
     while true do
         local _evd = { os.pullEvent() }
-        local tw, th = term.getSize()
         local ev, evd = table.remove(_evd, 1), _evd
         if ev == "key" then
             mplayer.heldKeys[evd[1]] = evd[2]
@@ -408,6 +427,8 @@ function()
                 end
                 cx = cx + #caption
             end
+        elseif ev == "term_resize" then
+            tw, th = term.getSize()
         elseif ev == "tape_removed" then
             mplayer.songs = {}
         elseif ev == "tape_inserted" then