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keyboard: recognize four escape sequences produced by iTerm2 

On iTerm2 on OS X, the Option+Arrow keys produce special sequences
that start with two escapes.  Catch these sequences and interpret
them appropriately as WordLeft / WordRight / Home / End.

Signed-off-by: Mike Scalora <mike@scalora.org>
Signed-off-by: Thomas Rosenau <thomasr@fantasymail.de>
Signed-off-by: Benno Schulenberg <bensberg@justemail.net>
master
Mike Scalora 2016-04-02 12:13:24 +02:00 committed by Benno Schulenberg
parent da9ea91b37
commit d851ccdd41
1 changed files with 28 additions and 1 deletions
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29
src/winio.c
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@ -330,6 +330,7 @@ int get_kbinput(WINDOW *win)
int parse_kbinput(WINDOW *win)
{
static int escapes = 0, byte_digits = 0;
static bool double_esc = FALSE;
int *kbinput, retval = ERR;
meta_key = FALSE;
@ -390,7 +391,30 @@ int parse_kbinput(WINDOW *win)
retval = parse_escape_sequence(win, *kbinput);
break;
case 2:
if (get_key_buffer_len() == 0) {
if (double_esc) {
/* An "ESC ESC [ X" sequence from Option+arrow. */
switch (*kbinput) {
case 'A':
retval = KEY_HOME;
break;
case 'B':
retval = KEY_END;
break;
#ifndef NANO_TINY
case 'C':
retval = controlright;
break;
case 'D':
retval = controlleft;
break;
#endif
default:
retval = ERR;
break;
}
double_esc = FALSE;
escapes = 0;
} else if (get_key_buffer_len() == 0) {
if (('0' <= *kbinput && *kbinput <= '2' &&
byte_digits == 0) || ('0' <= *kbinput &&
*kbinput <= '9' && byte_digits > 0)) {
@ -462,6 +486,9 @@ int parse_kbinput(WINDOW *win)
retval = *kbinput;
}
}
} else if (*kbinput=='[') {
/* This is an iTerm2 sequence: ^[ ^[ [ X. */
double_esc = TRUE;
} else {
/* Two escapes followed by a non-escape, and
* there are other keystrokes waiting: combined