Support software flow controlHEADdefault

Add a new `-p` / `--preserve` flag to textadept-curses. When specified,
don’t grab the XON and XOFF control characters from the TTY driver. This
allows textadept-curses to run effectively on serial terminals that use
XON/XOFF flow control.

The `-p` flag was chosen to align with nano, where it has the same
behavior.

1 files changed, 15 insertions, 1 deletions

diff --git a/src/textadept.c b/src/textadept.c
index a5e8ddbc..b34adc2a 100644
--- a/src/textadept.c
+++ b/src/textadept.c
@@ -2473,7 +2473,21 @@ int main(int argc, char **argv) {
 #if GTK
   gtk_init(&argc, &argv);
 #elif CURSES
-  ta_tk = termkey_new(0, 0);
+  int termkey_flags = 0;
+  for (int i = 0; i < argc; i++) {
+    if (strcmp("-p", argv[i]) == 0 || strcmp("--preserve", argv[i]) == 0) {
+      termkey_flags |= TERMKEY_FLAG_FLOWCONTROL;
+
+      // Remove -p/--preserve from the argument list so it doesn't get interpreted as a session
+      // name.
+      memmove(argv + i, argv + i + 1, (argc - 1 - i) * sizeof(*argv));
+      argc--;
+
+      break;
+    }
+  }
+
+  ta_tk = termkey_new(0, termkey_flags);
   setlocale(LC_CTYPE, ""); // for displaying UTF-8 characters properly
   initscr(); // raw()/cbreak() and noecho() are taken care of in libtermkey
 #if NCURSES_REENTRANT