osc.lua: add showlogo and showidlemsg options

This is mainly for other user scripts that may conflict with the osc
logo in some way. While you can use script-message and
shared-script-properties (highly discouraged in the documentation for
some reason) to work around this, there's still some brittle edge cases
and complicated logic that can pop up. Adding an option for these two
things (the logo and the "drop files..." text) is really trivial and
would make things easier for scripts. Discussed in a couple of issues
below:
mpv-player#10201
CogentRedTester/mpv-file-browser#55

DOCS/man/osc.rst

@@ -236,6 +236,16 @@ Configurable Options
 
     Enable the OSC when fullscreen
 
+``showlogo``
+    Default: yes
+
+    Show the mpv logo when idle
+
+``showidlemsg``
+    Default: yes
+
+    Show the "Drop files..." message when idle.
+
 ``scalewindowed``
     Default: 1.0
 

player/lua/osc.lua

@@ -11,6 +11,8 @@ local utils = require 'mp.utils'
 local user_opts = {
     showwindowed = true,        -- show OSC when windowed?
     showfullscreen = true,      -- show OSC when fullscreen?
+    showlogo = true,            -- show mpv logo on idle
+    showidlemsg = true,         -- show the "drop files" msg on idle
     scalewindowed = 1,          -- scaling of the controller when windowed
     scalefullscreen = 1,        -- scaling of the controller when fullscreen
     scaleforcedwindow = 2,      -- scaling when rendered on a forced window
@@ -2579,9 +2581,11 @@ function tick()
 
         local ass = assdraw.ass_new()
         -- mpv logo
-        for i, line in ipairs(logo_lines) do
-            ass:new_event()
-            ass:append(line_prefix .. line)
+        if user_opts.showlogo then
+            for i, line in ipairs(logo_lines) do
+                ass:new_event()
+                ass:append(line_prefix .. line)
+            end
         end
 
         -- Santa hat
@@ -2592,10 +2596,12 @@ function tick()
             end
         end
 
-        ass:new_event()
-        ass:pos(320, icon_y+65)
-        ass:an(8)
-        ass:append("Drop files or URLs to play here.")
+        if user_opts.showidlemsg then
+            ass:new_event()
+            ass:pos(320, icon_y+65)
+            ass:an(8)
+            ass:append("Drop files or URLs to play here.")
+        end
         set_osd(640, 360, ass.text)
 
         if state.showhide_enabled then