Show total size of non-filtered selected files in a directory.

nnn.1

@@ -317,6 +317,11 @@ To edit the selection use the _edit selection_ key. Editing doesn't end the
 selection mode. You can add more files to the selection and edit the list
 again. If no file is selected in the current session, this option attempts
 to list the selection file.
+.Pp
+.Nm
+can show the total size of non-filtered selected files listed in a
+directory. For directories, only the size of the directory is added by
+default. To add the size of the contents of a directory, switch to du mode.
 .Sh FIND AND LIST
 There are two ways to search and list:
 .Pp

src/nnn.c

@@ -5076,7 +5076,8 @@ static void show_help(const char *path)
 	          "ca  Select all%-14cA  Invert sel\n"
 	       "9p ^P  Copy here%-12cw ^W  Cp/mv sel as\n"
 	       "9v ^V  Move here%-15cE  Edit sel list\n"
-	       "9x ^X  Delete%-16cEsc  Send to FIFO\n"
+	       "9x ^X  Delete%-18cS  Listed sel size\n"
+		"aEsc  Send to FIFO\n"
 	"0\n"
 	"1MISC\n"
 	      "8Alt ;  Select plugin%-11c=  Launch app\n"
@@ -6633,6 +6634,19 @@ static bool cdprep(char *lastdir, char *lastname, char *path, char *newpath)
 	return cfg.filtermode;
 }
 
+static void showselsize(const char *path)
+{
+	off_t sz = 0;
+	int len = scanselforpath(path, FALSE);
+
+	for (int r = 0; r < ndents; ++r)
+		if (findinsel(findselpos,
+				len + xstrsncpy(g_sel + len, pdents[r].name, pdents[r].nlen)))
+			sz += cfg.blkorder ? pdents[r].blocks : pdents[r].size;
+
+	printmsg(coolsize(cfg.blkorder ? sz << blk_shift : sz));
+}
+
 static bool browse(char *ipath, const char *session, int pkey)
 {
 	alignas(max_align_t) char newpath[PATH_MAX];
@@ -7843,6 +7857,9 @@ nochange:
 			if (g_state.runplugin == 1) /* Allow filtering in plugins directory */
 				presel = FILTER;
 			goto begin;
+		case SEL_SELSIZE:
+			showselsize(path);
+			goto nochange;
 		case SEL_SHELL: // fallthrough
 		case SEL_LAUNCH: // fallthrough
 		case SEL_PROMPT:

src/nnn.h

@@ -105,6 +105,7 @@ enum action {
 	SEL_AUTONEXT,
 	SEL_EDIT,
 	SEL_PLUGIN,
+	SEL_SELSIZE,
 	SEL_SHELL,
 	SEL_LAUNCH,
 	SEL_PROMPT,
@@ -257,6 +258,8 @@ static struct key bindings[] = {
 	{ 'e',            SEL_EDIT },
 	/* Run a plugin */
 	{ ';',            SEL_PLUGIN },
+	/* Show total size of listed selection */
+	{ 'S',            SEL_SELSIZE },
 	/* Run command */
 	{ '!',            SEL_SHELL },
 	{ CONTROL(']'),   SEL_SHELL },