commands: add print_text input command to print text on the terminal

In theory, this could take over the role of the get_property slave
command, and is more general.

DOCS/man/en/input.rst

@@ -160,6 +160,10 @@ osd [<level>]
     Toggle OSD level. If <level> is specified, set the OSD mode
     (see ``--osd-level`` for valid values).
 
+print_text "<string>"
+    Print text to stdout. The string can contain properties, which are expanded
+    like in ``--playing-msg``.
+
 show_text "<string>" [<duration>] [<level>]
     Show text on the OSD. The string can contain properties, which are expanded
     like in ``--playing-msg``. This can be used to show playback time, filename,

command.c

@@ -1936,6 +1936,15 @@ void run_command(MPContext *mpctx, mp_cmd_t *cmd)
         break;
     }
 
+    case MP_CMD_PRINT_TEXT: {
+        char *txt = mp_property_expand_string(mpctx, cmd->args[0].v.s);
+        if (txt) {
+            mp_msg(MSGT_GLOBAL, MSGL_INFO, "%s\n", txt);
+            talloc_free(txt);
+        }
+        break;
+    }
+
     case MP_CMD_SHOW_TEXT: {
         char *txt = mp_property_expand_string(mpctx, cmd->args[0].v.s);
         if (txt) {

input/input.c

@@ -132,6 +132,7 @@ static const mp_cmd_t mp_cmds[] = {
   }},
   { MP_CMD_SUB_STEP, "sub_step", { ARG_INT } },
   { MP_CMD_OSD, "osd", { OARG_INT(-1) } },
+  { MP_CMD_PRINT_TEXT, "print_text", { ARG_STRING } },
   { MP_CMD_SHOW_TEXT, "show_text", { ARG_STRING, OARG_INT(-1), OARG_INT(0) } },
   { MP_CMD_SHOW_PROGRESS, "show_progress", },
   { MP_CMD_SUB_LOAD, "sub_load", { ARG_STRING } },

input/input.h

@@ -51,6 +51,7 @@ enum mp_command_type {
     MP_CMD_KEYDOWN_EVENTS,
     MP_CMD_SET,
     MP_CMD_GET_PROPERTY,
+    MP_CMD_PRINT_TEXT,
     MP_CMD_SHOW_TEXT,
     MP_CMD_SHOW_PROGRESS,
     MP_CMD_RADIO_STEP_CHANNEL,