From: Andreas Kupries <akupries@shaw.ca>
Date: Fri, 25 Jan 2013 21:12:52 +0000 (-0800)
Subject: New feature: Extended character transpose (Ctrl+t) at end of the line.
X-Git-Url: https://git.lizzy.rs/?a=commitdiff_plain;h=75abbdf96c241e888687dfcaa4f111ba67cfabd5;p=linenoise.git

New feature: Extended character transpose (Ctrl+t) at end of the line.

Bash is able to transpose characters with the cursor after the last
character. It simply transposes the last two. Added this behavior
to linenoise.
---

diff --git a/linenoise.c b/linenoise.c
index 21f62f5..92cb5ef 100644
--- a/linenoise.c
+++ b/linenoise.c
@@ -1122,9 +1122,11 @@ process_char:
             }
             break;
         case ctrl('T'):    /* ctrl-t */
-            if (current->pos > 0 && current->pos < current->chars) {
-                c = get_char(current, current->pos);
-                remove_char(current, current->pos);
+            if (current->pos > 0 && current->pos <= current->chars) {
+                /* If cursor is at end, transpose the previous two chars */
+                int fixer = (current->pos == current->chars);
+                c = get_char(current, current->pos - fixer);
+                remove_char(current, current->pos - fixer);
                 insert_char(current, current->pos - 1, c);
                 refreshLine(current->prompt, current);
             }