Add a transpose-chars command in edit mode (C-t in emacs mode only). From Kalle

Olavi Niemitalo.

mode-key.c

@@ -57,6 +57,7 @@ struct mode_key_cmdstr mode_key_cmdstr_edit[] = {
 	{ MODEKEYEDIT_STARTOFLINE, "start-of-line" },
 	{ MODEKEYEDIT_SWITCHMODE, "switch-mode" },
 	{ MODEKEYEDIT_SWITCHMODEAPPEND, "switch-mode-append" },
+	{ MODEKEYEDIT_TRANSPOSECHARS, "transpose-chars" },
 
 	{ 0, NULL }
 };
@@ -200,6 +201,7 @@ const struct mode_key_entry mode_key_emacs_edit[] = {
 	{ '\013' /* C-k	*/,	0, MODEKEYEDIT_DELETETOENDOFLINE },
 	{ '\016' /* C-n */,	0, MODEKEYEDIT_HISTORYDOWN },
 	{ '\020' /* C-p */,	0, MODEKEYEDIT_HISTORYUP },
+	{ '\024' /* C-t */,	0, MODEKEYEDIT_TRANSPOSECHARS },
 	{ '\025' /* C-u	*/,	0, MODEKEYEDIT_DELETELINE },
 	{ '\031' /* C-y */,	0, MODEKEYEDIT_PASTE },
 	{ '\033' /* Escape */,	0, MODEKEYEDIT_CANCEL },

status.c

@@ -763,7 +763,7 @@ void
 status_prompt_key(struct client *c, int key)
 {
 	struct paste_buffer	*pb;
-	char   			*s, *first, *last, word[64];
+	char   			*s, *first, *last, word[64], swapc;
 	size_t			 size, n, off, idx;
 
 	size = strlen(c->prompt_buffer);
@@ -933,6 +933,18 @@ status_prompt_key(struct client *c, int key)
 
 		c->flags |= CLIENT_STATUS;
 		break;
+	case MODEKEYEDIT_TRANSPOSECHARS:
+		idx = c->prompt_index;
+		if (idx < size)
+			idx++;
+		if (idx >= 2) {
+			swapc = c->prompt_buffer[idx - 2];
+			c->prompt_buffer[idx - 2] = c->prompt_buffer[idx - 1];
+			c->prompt_buffer[idx - 1] = swapc;
+			c->prompt_index = idx;
+			c->flags |= CLIENT_STATUS;
+		}
+		break;
  	case MODEKEYEDIT_ENTER:
 		if (*c->prompt_buffer != '\0')
 			status_prompt_add_history(c);

tmux.1

@@ -497,6 +497,7 @@ The following keys are supported as appropriate for the mode:
 .It Li "Search forward" Ta "/" Ta "C-s"
 .It Li "Start of line" Ta "0" Ta "C-a"
 .It Li "Start selection" Ta "Space" Ta "C-Space"
+.It Li "Transpose chars" Ta "" Ta "C-t"
 .El
 .Pp
 These key bindings are defined in a set of named tables:

tmux.h

@@ -379,6 +379,7 @@ enum mode_key_cmd {
 	MODEKEYEDIT_STARTOFLINE,
 	MODEKEYEDIT_SWITCHMODE,
 	MODEKEYEDIT_SWITCHMODEAPPEND,
+	MODEKEYEDIT_TRANSPOSECHARS,
 	
 	/* Menu (choice) keys. */
 	MODEKEYCHOICE_CANCEL,