added a -t / -b option to set the menu at the top / bottom of the screen - iomenu - interactive terminal-based selection menu
HTML git clone git://bitreich.org/iomenu git://enlrupgkhuxnvlhsf6lc3fziv5h2hhfrinws65d7roiv6bfj7d652fid.onion/iomenu
DIR Log
DIR Files
DIR Refs
DIR Tags
DIR README
DIR LICENSE
---
DIR commit 0bf49abb280f7bdbc6e13f12a84a844e119061db
DIR parent 1035fe68e4071585215a146fd1d31a914534c89d
HTML Author: Josuah Demangeonā ā µ <mail@josuah.net>
Date: Fri, 31 Mar 2017 19:24:39 +0200
added a -t / -b option to set the menu at the top / bottom of the screen
Diffstat:
M iomenu.1 | 6 ++++++
M iomenu.c | 61 +++++++++++++++++++++----------
2 files changed, 48 insertions(+), 19 deletions(-)
---
DIR diff --git a/iomenu.1 b/iomenu.1
@@ -11,6 +11,8 @@
.
.Nm
.Op Fl l Ar lines
+.Op Fl b
+.Op Fl t
.
.Sh DESCRIPTION
.
@@ -31,6 +33,10 @@ the items are displayed in an horizontal list.
Otherwise, in a vertical list of at most
.Ar lines
lines.
+.
+.It Fl t / Fl b
+Print the menu at the top / bottom rather than at current cursor position.
+Reset the cursor postition afterward.
.El
.
.Ss Selection control
DIR diff --git a/iomenu.c b/iomenu.c
@@ -27,7 +27,7 @@ static int current = 0, offset = 0, prev = 0, next = 0;
static int linec = 0, matchc = 0;
static wchar_t **linev = NULL, **matchv = NULL;
static wchar_t input[BUFSIZ], formatted[BUFSIZ * 8];
-static int opt_l = 0;
+static int opt_l = 0, opt_tb = 0;
static void
@@ -59,18 +59,50 @@ set_terminal(void)
{
struct termios new;
+ /* get window size */
+ if (ioctl(tty_fd, TIOCGWINSZ, &ws) < 0)
+ die("ioctl");
+
+ /* save cursor postition */
+ fputws(L"\033[s", stderr);
+
+ /* put cursor at the top / bottom */
+ switch (opt_tb) {
+ case 't': fputws(L"\033[H", stderr); break;
+ case 'b': fwprintf(stderr, L"\033[%dH", ws.ws_row - opt_l); break;
+ }
+
+ /* save attributes to `termios` */
if (tcgetattr(tty_fd, &termios) < 0 || tcgetattr(tty_fd, &new) < 0) {
perror("tcgetattr");
exit(EXIT_FAILURE);
}
+ /* change to raw mode */
new.c_lflag &= ~(ICANON | ECHO | IGNBRK);
-
tcsetattr(tty_fd, TCSANOW, &new);
}
static void
+reset_terminal(void)
+{
+ extern struct termios termios;
+ extern struct winsize ws;
+
+ /* clear terminal */
+ for (int i = 0; i < opt_l + 1; i++)
+ fputws(L"\r\033[K\n", stderr);
+
+ /* reset cursor position */
+ fputws(L"\033[u", stderr);
+
+ /* set terminal back to normal mode */
+ tcsetattr(tty_fd, TCSANOW, &termios);
+}
+
+
+static void
read_lines(void)
{
wchar_t buffer[BUFSIZ];
@@ -215,9 +247,6 @@ print_screen(void)
{
int count;
- if (ioctl(tty_fd, TIOCGWINSZ, &ws) < 0)
- die("ioctl");
-
count = MIN(opt_l, ws.ws_row - 2);
fputws(L"\r\033[K", stderr);
@@ -239,15 +268,6 @@ print_screen(void)
}
-static void
-clear(int lines)
-{
- for (int i = 0; i < lines + 1; i++)
- fputws(L"\r\033[K\n", stderr);
- fwprintf(stderr, L"\033[%dA", lines + 1);
-}
-
-
static int
match_line(wchar_t *line, wchar_t **tokv, int tokc)
{
@@ -340,7 +360,6 @@ input_key(void)
switch (key) {
case CONTROL('C'):
- clear(opt_l);
return EXIT_FAILURE;
case CONTROL('U'):
@@ -399,6 +418,7 @@ input_get(void)
input[0] = '\0';
+ print_screen();
while ((exit_code = input_key()) == CONTINUE)
print_screen();
@@ -431,6 +451,10 @@ main(int argc, char *argv[])
if (++i >= argc || sscanf(argv[i], "%d", &opt_l) <= 0)
usage();
break;
+
+ case 't': opt_tb = 't'; break;
+ case 'b': opt_tb = 'b'; break;
+
default:
usage();
}
@@ -442,15 +466,14 @@ main(int argc, char *argv[])
if (!freopen("/dev/tty", "r", stdin) || !freopen("/dev/tty", "w", stderr))
die("freopen");
tty_fd = open("/dev/tty", O_RDWR);
-
set_terminal();
- print_screen();
+ /* main loop */
exit_code = input_get();
- tcsetattr(tty_fd, TCSANOW, &termios);
- clear(opt_l);
+ reset_terminal();
close(tty_fd);
+
free_all();
return exit_code;