config: add 'show-scrollback-position' option to footrc

config.c

@@ -291,6 +291,9 @@ parse_section_main(const char *key, const char *value, struct config *conf,
         conf->scrollback_lines = lines;
     }
 
+    else if (strcmp(key, "show-scrollback-position") == 0)
+        conf->show_scrollback_position = str_to_bool(value);
+
     else {
         LOG_ERR("%s:%u: invalid key: %s", path, lineno, key);
         return false;
@@ -918,6 +921,7 @@ config_load(struct config *conf, const char *conf_path)
         .startup_mode = STARTUP_WINDOWED,
         .fonts = tll_init(),
         .scrollback_lines = 1000,
+        .show_scrollback_position = true,
 
         .colors = {
             .fg = default_foreground,

config.h

@@ -40,6 +40,7 @@ struct config {
     tll(struct config_font) fonts;
 
     int scrollback_lines;
+    bool show_scrollback_position;
 
     struct {
         uint32_t fg;

doc/foot.5.scd

@@ -68,6 +68,10 @@ in this order:
 *scrollback*
 	Number of scrollback lines. Default: _1000_.
 
+*show-scrollback-position*
+	Boolean. Enables a position indicator when the viewport is not at
+	the bottom of the scrollback history. Default: _yes_.
+
 *workers*
 	Number of threads to use for rendering. Set to 0 to disable
 	multithreading. Default: the number of available logical CPUs

render.c

@@ -1290,10 +1290,8 @@ render_csd(struct terminal *term)
 static void
 render_scrollback_position(struct terminal *term)
 {
-#if 0
     if (!term->conf->show_scrollback_position)
         return;
-#endif
 
     /* Find absolute row number of the scrollback start */
     int scrollback_start = term->grid->offset + term->rows;