osc.lua: add idlescreen and osc-idlescreen

This is mainly for other user scripts that may conflict with the osc
logo in some way. Although it is possible to listen for
shared-script-properties, this has many edge cases that could easily pop
up. A user could want other OSC things to happen at the same time (say
osc-message). They just don't want the logo. The idlescreen option
disables all idlescreen related things (including the santa hat) if it
is set to "no". A new script message (osc-idlescreen) is also added so
users can easily toggle the value (passing "cycle" or just explictly
setting "yes" or "no"). Some more discussion on this is found in the
below github issues.
mpv-player#10201
CogentRedTester/mpv-file-browser#55

DOCS/man/osc.rst

@@ -236,6 +236,11 @@ Configurable Options
 
     Enable the OSC when fullscreen
 
+``showidlescreen``
+    Default: yes
+
+    Show the mpv logo and message when idle
+
 ``scalewindowed``
     Default: 1.0
 
@@ -418,6 +423,10 @@ to set auto mode (the default) with ``b``::
     a script-message osc-visibility never
     b script-message osc-visibility auto
 
+``osc-idlescreen``
+    Controls the visibility of the mpv logo on idle. Valid arguments are ``yes``,
+    ``no``, and ``cycle`` to toggle between yes and no.
+
 ``osc-playlist``, ``osc-chapterlist``, ``osc-tracklist``
     Shows a limited view of the respective type of list using the OSC. First
     argument is duration in seconds.

player/lua/osc.lua

@@ -11,6 +11,7 @@ local utils = require 'mp.utils'
 local user_opts = {
     showwindowed = true,        -- show OSC when windowed?
     showfullscreen = true,      -- show OSC when fullscreen?
+    idlescreen = true,          -- show mpv logo 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
@@ -2579,23 +2580,27 @@ 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.idlescreen then
+            for i, line in ipairs(logo_lines) do
+                ass:new_event()
+                ass:append(line_prefix .. line)
+            end
         end
 
         -- Santa hat
-        if is_december and not user_opts.greenandgrumpy then
+        if is_december and user_opts.idlescreen and not user_opts.greenandgrumpy then
             for i, line in ipairs(santa_hat_lines) do
                 ass:new_event()
                 ass:append(line_prefix .. line)
             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.idlescreen 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
@@ -2844,9 +2849,35 @@ function visibility_mode(mode, no_osd)
     request_tick()
 end
 
+function idlescreen_visibility(mode, no_osd)
+    if mode == "cycle" then
+        if user_opts.idlescreen then
+            mode = "no"
+        else
+            mode = "yes"
+        end
+    end
+
+    if mode == "yes" then
+        user_opts.idlescreen = true
+    else
+        user_opts.idlescreen = false
+    end
+
+    utils.shared_script_property_set("osc-idlescreen", mode)
+
+    if not no_osd and tonumber(mp.get_property("osd-level")) >= 1 then
+        mp.osd_message("OSC logo visibility: " .. tostring(mode))
+    end
+
+    request_tick()
+end
+
 visibility_mode(user_opts.visibility, true)
 mp.register_script_message("osc-visibility", visibility_mode)
 mp.add_key_binding(nil, "visibility", function() visibility_mode("cycle") end)
 
+mp.register_script_message("osc-idlescreen", idlescreen_visibility)
+
 set_virt_mouse_area(0, 0, 0, 0, "input")
 set_virt_mouse_area(0, 0, 0, 0, "window-controls")