command: add a property that returns a list of all properties

Also remove the undocumented Lua mp.property_list() function.

DOCS/man/input.rst

@@ -1258,6 +1258,8 @@ Property list
     require reloading the file for changes to take effect. If there is an
     equivalent property, prefer setting the property instead.
 
+``property-list``
+    Return the list of top-level properties.
 
 Property Expansion
 ------------------

player/command.c

@@ -2623,6 +2623,30 @@ static int mp_property_options(void *ctx, struct m_property *prop,
     return M_PROPERTY_NOT_IMPLEMENTED;
 }
 
+static const struct m_property mp_properties[];
+
+static int mp_property_list(void *ctx, struct m_property *prop,
+                            int action, void *arg)
+{
+    switch (action) {
+    case M_PROPERTY_GET_TYPE:
+        *(struct m_option *)arg = (struct m_option){.type = CONF_TYPE_STRING_LIST};
+        return M_PROPERTY_OK;
+    case M_PROPERTY_GET: {
+        char **list = NULL;
+        int num = 0;
+        for (int n = 0; mp_properties[n].name; n++) {
+            MP_TARRAY_APPEND(NULL, list, num,
+                                talloc_strdup(NULL, mp_properties[n].name));
+        }
+        MP_TARRAY_APPEND(NULL, list, num, NULL);
+        *(char ***)arg = list;
+        return M_PROPERTY_OK;
+    }
+    }
+    return M_PROPERTY_NOT_IMPLEMENTED;
+}
+
 // Redirect a property name to another
 #define M_PROPERTY_ALIAS(name, real_property) \
     {(name), mp_property_alias, .priv = (real_property)}
@@ -2780,6 +2804,7 @@ static const struct m_property mp_properties[] = {
     M_PROPERTY_ALIAS("sub", "sid"),
 
     {"options", mp_property_options},
+    {"property-list", mp_property_list},
 
     {0},
 };
@@ -2809,11 +2834,6 @@ static const char *const *const mp_event_property_change[] = {
 };
 #undef E
 
-const struct m_property *mp_get_property_list(void)
-{
-    return mp_properties;
-}
-
 static bool is_property_set(int action, void *val)
 {
     switch (action) {

player/command.h

@@ -33,9 +33,6 @@ void property_print_help(struct mp_log *log);
 int mp_property_do(const char* name, int action, void* val,
                    struct MPContext *mpctx);
 
-const struct m_property *mp_get_property_list(void);
-int mp_find_property_index(const char *property);
-
 void mp_notify(struct MPContext *mpctx, int event, void *arg);
 void mp_notify_property(struct MPContext *mpctx, const char *property);
 

player/lua.c

@@ -699,18 +699,6 @@ static int script_set_property_native(lua_State *L)
 
 }
 
-static int script_property_list(lua_State *L)
-{
-    const struct m_property *props = mp_get_property_list();
-    lua_newtable(L);
-    for (int i = 0; props[i].name; i++) {
-        lua_pushinteger(L, i + 1);
-        lua_pushstring(L, props[i].name);
-        lua_settable(L, -3);
-    }
-    return 1;
-}
-
 static int script_get_property(lua_State *L)
 {
     struct script_ctx *ctx = get_ctx(L);
@@ -1099,7 +1087,6 @@ static const struct fn_entry main_fns[] = {
     FN_ENTRY(set_property_native),
     FN_ENTRY(raw_observe_property),
     FN_ENTRY(raw_unobserve_property),
-    FN_ENTRY(property_list),
     FN_ENTRY(set_osd_ass),
     FN_ENTRY(get_osd_resolution),
     FN_ENTRY(get_screen_size),