command: add osd-sym-cc property

This allows you to reproduce the OSD symbol.

DOCS/man/input.rst

@@ -1296,6 +1296,11 @@ Property list
 ``seekable``
     Return whether it's generally possible to seek in the current file.
 
+``osd-sym-cc``
+    Inserts the current OSD symbol as opaque OSD control code (cc). This makes
+    sense with the ``show_text`` command only. The control code is
+    implementation specific and is useless for any other use.
+
 ``options/<name>`` (RW)
     Read-only access to value of option ``--<name>``. Most options can be
     changed at runtime by writing to this property. Note that many options

player/command.c

@@ -2220,6 +2220,15 @@ static int mp_property_osd_par(void *ctx, struct m_property *prop,
     return m_property_double_ro(action, arg, vo_res.display_par);
 }
 
+static int mp_property_osd_sym(void *ctx, struct m_property *prop,
+                               int action, void *arg)
+{
+    MPContext *mpctx = ctx;
+    char temp[20];
+    get_current_osd_sym(mpctx, temp, sizeof(temp));
+    return m_property_strdup_ro(action, arg, temp);
+}
+
 /// Video fps (RO)
 static int mp_property_fps(void *ctx, struct m_property *prop,
                            int action, void *arg)
@@ -2806,6 +2815,8 @@ static const struct m_property mp_properties[] = {
     {"osd-height", mp_property_osd_h},
     {"osd-par", mp_property_osd_par},
 
+    {"osd-sym-cc", mp_property_osd_sym},
+
     // Subs
     {"sid", mp_property_sub},
     {"secondary-sid", mp_property_sub2},

player/core.h

@@ -434,6 +434,7 @@ void set_osd_msg(struct MPContext *mpctx, int level, int time,
                  const char* fmt, ...) PRINTF_ATTRIBUTE(4,5);
 void set_osd_function(struct MPContext *mpctx, int osd_function);
 void set_osd_subtitle(struct MPContext *mpctx, const char *text);
+void get_current_osd_sym(struct MPContext *mpctx, char *buf, size_t buf_size);
 
 // playloop.c
 void mp_wait_events(struct MPContext *mpctx, double sleeptime);

player/osd.c

@@ -443,17 +443,8 @@ void set_osd_subtitle(struct MPContext *mpctx, const char *text)
     term_osd_set_subs(mpctx, text);
 }
 
-// sym == mpctx->osd_function
-static void saddf_osd_function_sym(char **buffer, int sym)
+void get_current_osd_sym(struct MPContext *mpctx, char *buf, size_t buf_size)
 {
-    char temp[10];
-    osd_get_function_sym(temp, sizeof(temp), sym);
-    saddf(buffer, "%s ", temp);
-}
-
-static void sadd_osd_status(char **buffer, struct MPContext *mpctx, bool full)
-{
-    bool fractions = mpctx->opts->osd_fractions;
     int sym = mpctx->osd_function;
     if (!sym) {
         if (mpctx->paused_for_cache && !mpctx->opts->pause) {
@@ -464,7 +455,15 @@ static void sadd_osd_status(char **buffer, struct MPContext *mpctx, bool full)
             sym = OSD_PLAY;
         }
     }
-    saddf_osd_function_sym(buffer, sym);
+    osd_get_function_sym(buf, buf_size, sym);
+}
+
+static void sadd_osd_status(char **buffer, struct MPContext *mpctx, bool full)
+{
+    bool fractions = mpctx->opts->osd_fractions;
+    char sym[10];
+    get_current_osd_sym(mpctx, sym, sizeof(sym));
+    saddf(buffer, "%s ", sym);
     char *custom_msg = mpctx->opts->osd_status_msg;
     if (custom_msg && full) {
         char *text = mp_property_expand_escaped_string(mpctx, custom_msg);