updated panel mode

sfm

@@ -1,5 +1,6 @@
 #!/bin/sh
-# sfm - Simple File Manager in POSIX sh
+# sfm - Simple File Manager in POSIX sh (flicker-free)
+# version 0.4
 
 # --- terminal control ---
 tput_cmd() { command -v tput >/dev/null 2>&1 && tput "$@"; }
@@ -456,10 +457,36 @@ draw_preview() {
 
     case "$entry" in
         */)
-            # directory: show entry count
-            _dc=$(ls -1 "$_path" 2>/dev/null | wc -l | tr -d '[:space:]')
+            # directory: list contents
+            _max_lines=$((_rows - 3))
+            _pr=2
+            for _de in "$_path"/*/; do
+                [ "$_pr" -gt $((_rows - 1)) ] && break
+                [ -d "$_de" ] || continue
+                _dn="${_de%/}"; _dn="${_dn##*/}"
+                [ "$_dn" = "*" ] && continue
+                _dl=" ${_dn}/"
+                [ "${#_dl}" -gt "$((_pw - 1))" ] && _dl="$(printf '%s' "$_dl" | cut -c1-$((_pw-2)))~"
+                goto "$_pr" "$_px"
+                printf '%s%s%s' "${GREEN}${BOLD}" "$_dl" "${RESET}"
+                _pr=$((_pr + 1))
+            done
+            for _fe in "$_path"/*; do
+                [ "$_pr" -gt $((_rows - 1)) ] && break
+                [ -e "$_fe" ] || continue
+                [ -d "$_fe" ] && continue
+                _fn="${_fe##*/}"
+                [ "$_fn" = "*" ] && continue
+                _fl=" ${_fn}"
+                [ "${#_fl}" -gt "$((_pw - 1))" ] && _fl="$(printf '%s' "$_fl" | cut -c1-$((_pw-2)))~"
+                goto "$_pr" "$_px"
+                printf '%s%s%s' "${WHITE}" "$_fl" "${RESET}"
+                _pr=$((_pr + 1))
+            done
+            if [ "$_pr" -eq 2 ]; then
                 goto 2 "$_px"
-            printf '%s[dir] %s items%s' "${CYAN}" "${_dc}" "${RESET}"
+                printf '%s(empty)%s' "${WHITE}" "${RESET}"
+            fi
             ;;
         *@)
             # symlink