{select,osc}.lua: add a miscellaneous menu

Add a generic menu to bar layouts to provide discoverability for the
select menus to users who don't realize you can right click OSC buttons.

There's no space to add it in box layout.

DOCS/man/mpv.rst

@@ -327,6 +327,9 @@ g-b
 g-r
     Show the values of all properties.
 
+MENU
+    Show a menu with miscellaneous entries.
+
 (The following keys are valid if you have a keyboard with multimedia keys.)
 
 PAUSE

DOCS/man/osc.rst

@@ -21,7 +21,7 @@ The Interface
 ::
 
     +---------+----------+------------------------------------------+----------+
-    | pl prev | pl next  |  title                                   |    cache |
+    | pl prev | menu | pl next | title                                   cache |
     +------+--+---+------+---------+-----------+------+-------+-----+-----+----+
     | play | skip | skip | time    |  seekbar  | time | audio | sub | vol | fs |
     |      | back | frwd | elapsed |           | left |       |     |     |    |
@@ -36,6 +36,11 @@ pl prev
     right-click     open the playlist selector
     =============   ================================================
 
+menu
+    =============   ================================================
+    left-click      open the menu
+    =============   ================================================
+
 pl next
     =============   ================================================
     left-click      play next file in playlist
@@ -510,6 +515,12 @@ clicked. ``mbtn_mid`` commands are also triggered with ``shift+mbtn_left``.
 
 ``playlist_prev_mbtn_right_command=script-binding select/select-playlist; script-message-to osc osc-hide``
 
+``menu_mbtn_left_command=script-binding select/menu; script-message-to osc osc-hide``
+
+``menu_mbtn_mid_command=``
+
+``menu_mbtn_right_command=``
+
 ``playlist_next_mbtn_left_command=playlist-next; show-text ${playlist} 3000``
 
 ``playlist_next_mbtn_mid_command=show-text ${playlist} 3000``

etc/input.conf

@@ -188,6 +188,7 @@
 #g-d script-binding select/select-audio-device
 #g-b script-binding select/select-binding
 #g-r script-binding select/show-properties
+#MENU script-binding select/menu
 
 #Alt+KP1 add video-rotate -1 # rotate video counterclockwise by 1 degree
 #Alt+KP5 set video-rotate  0 # reset rotation

player/lua/osc.lua

@@ -75,6 +75,10 @@ local user_opts = {
     playlist_prev_mbtn_mid_command = "show-text ${playlist} 3000",
     playlist_prev_mbtn_right_command = "script-binding select/select-playlist; script-message-to osc osc-hide",
 
+    menu_mbtn_left_command = "script-binding select/menu; script-message-to osc osc-hide",
+    menu_mbtn_mid_command = "",
+    menu_mbtn_right_command = "",
+
     playlist_next_mbtn_left_command = "playlist-next",
     playlist_next_mbtn_mid_command = "show-text ${playlist} 3000",
     playlist_next_mbtn_right_command = "script-binding select/select-playlist; script-message-to osc osc-hide",
@@ -1556,13 +1560,20 @@ local function bar_layout(direction)
     lo.alpha[1] = user_opts.boxalpha
 
 
-    -- Playlist prev/next
+    -- Playlist prev
     geo = { x = osc_geo.x + padX, y = line1,
             an = 4, w = 18, h = 18 - padY }
     lo = add_layout("playlist_prev")
     lo.geometry = geo
     lo.style = osc_styles.topButtonsBar
 
+    -- Menu
+    geo = { x = geo.x + geo.w + padX, y = geo.y, an = geo.an, w = geo.w, h = geo.h }
+    lo = add_layout("menu")
+    lo.geometry = geo
+    lo.style = osc_styles.topButtonsBar
+
+    -- Playlist next
     geo = { x = geo.x + geo.w + padX, y = geo.y, an = geo.an, w = geo.w, h = geo.h }
     lo = add_layout("playlist_next")
     lo.geometry = geo
@@ -1775,16 +1786,19 @@ local function osc_init()
     end
     bind_mouse_buttons("title")
 
-    -- playlist buttons
-
-    -- prev
+    -- playlist prev
     ne = new_element("playlist_prev", "button")
 
     ne.content = "\238\132\144"
     ne.enabled = (pl_pos > 1) or (loop ~= "no")
     bind_mouse_buttons("playlist_prev")
 
-    --next
+    -- menu
+    ne = new_element("menu", "button")
+    ne.content = "☰"
+    bind_mouse_buttons("menu")
+
+    -- playlist next
     ne = new_element("playlist_next", "button")
 
     ne.content = "\238\132\129"

player/lua/select.lua

@@ -427,3 +427,29 @@ mp.add_key_binding(nil, "show-properties", function ()
         end,
     })
 end)
+
+mp.add_key_binding(nil, "menu", function ()
+    local menu = {
+        {"Subtitles", "script-binding select/select-sid"},
+        {"Audio tracks", "script-binding select/select-aid"},
+        {"Playlist", "script-binding select/select-playlist"},
+        {"Chapters", "script-binding select/select-chapter"},
+        {"Editions", "script-binding select/select-edition"},
+        {"Audio devices", "script-binding select/select-audio-device"},
+    }
+
+    local labels = {}
+    local commands = {}
+
+    for i, pair in ipairs(menu) do
+        labels[i], commands[i] = unpack(pair)
+    end
+
+    input.select({
+        prompt = "",
+        items = labels,
+        submit = function (i)
+            mp.command(commands[i])
+        end,
+    })
+end)