660 lines
14 KiB
C
660 lines
14 KiB
C
/*
|
|
* $Id: ui_getc.c,v 1.67 2013/03/24 23:53:19 tom Exp $
|
|
*
|
|
* ui_getc.c - user interface glue for getc()
|
|
*
|
|
* Copyright 2001-2012,2013 Thomas E. Dickey
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU Lesser General Public License, version 2.1
|
|
* as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this program; if not, write to
|
|
* Free Software Foundation, Inc.
|
|
* 51 Franklin St., Fifth Floor
|
|
* Boston, MA 02110, USA.
|
|
*/
|
|
|
|
#include <dialog.h>
|
|
#include <dlg_keys.h>
|
|
|
|
#ifdef NEED_WCHAR_H
|
|
#include <wchar.h>
|
|
#endif
|
|
|
|
#if TIME_WITH_SYS_TIME
|
|
# include <sys/time.h>
|
|
# include <time.h>
|
|
#else
|
|
# if HAVE_SYS_TIME_H
|
|
# include <sys/time.h>
|
|
# else
|
|
# include <time.h>
|
|
# endif
|
|
#endif
|
|
|
|
#ifdef HAVE_SYS_WAIT_H
|
|
#include <sys/wait.h>
|
|
#endif
|
|
|
|
#ifdef __QNX__
|
|
#include <sys/select.h>
|
|
#endif
|
|
|
|
#ifndef WEXITSTATUS
|
|
# ifdef HAVE_TYPE_UNIONWAIT
|
|
# define WEXITSTATUS(status) (status.w_retcode)
|
|
# else
|
|
# define WEXITSTATUS(status) (((status) & 0xff00) >> 8)
|
|
# endif
|
|
#endif
|
|
|
|
#ifndef WTERMSIG
|
|
# ifdef HAVE_TYPE_UNIONWAIT
|
|
# define WTERMSIG(status) (status.w_termsig)
|
|
# else
|
|
# define WTERMSIG(status) ((status) & 0x7f)
|
|
# endif
|
|
#endif
|
|
|
|
void
|
|
dlg_add_callback(DIALOG_CALLBACK * p)
|
|
{
|
|
p->next = dialog_state.getc_callbacks;
|
|
dialog_state.getc_callbacks = p;
|
|
wtimeout(p->win, WTIMEOUT_VAL);
|
|
}
|
|
|
|
/*
|
|
* Like dlg_add_callback(), but providing for cleanup of caller's associated
|
|
* state.
|
|
*/
|
|
void
|
|
dlg_add_callback_ref(DIALOG_CALLBACK ** p, DIALOG_FREEBACK freeback)
|
|
{
|
|
(*p)->caller = p;
|
|
(*p)->freeback = freeback;
|
|
dlg_add_callback(*p);
|
|
}
|
|
|
|
void
|
|
dlg_remove_callback(DIALOG_CALLBACK * p)
|
|
{
|
|
DIALOG_CALLBACK *q;
|
|
|
|
if (p->input != 0) {
|
|
fclose(p->input);
|
|
if (p->input == dialog_state.pipe_input)
|
|
dialog_state.pipe_input = 0;
|
|
p->input = 0;
|
|
}
|
|
|
|
if (!(p->keep_win))
|
|
dlg_del_window(p->win);
|
|
if ((q = dialog_state.getc_callbacks) == p) {
|
|
dialog_state.getc_callbacks = p->next;
|
|
} else {
|
|
while (q != 0) {
|
|
if (q->next == p) {
|
|
q->next = p->next;
|
|
break;
|
|
}
|
|
q = q->next;
|
|
}
|
|
}
|
|
|
|
/* handle dlg_add_callback_ref cleanup */
|
|
if (p->freeback != 0)
|
|
p->freeback(p);
|
|
if (p->caller != 0)
|
|
*(p->caller) = 0;
|
|
|
|
free(p);
|
|
}
|
|
|
|
/*
|
|
* A select() might find more than one input ready for service. Handle them
|
|
* all.
|
|
*/
|
|
static bool
|
|
handle_inputs(WINDOW *win)
|
|
{
|
|
bool result = FALSE;
|
|
DIALOG_CALLBACK *p;
|
|
DIALOG_CALLBACK *q;
|
|
int cur_y, cur_x;
|
|
int state = ERR;
|
|
|
|
getyx(win, cur_y, cur_x);
|
|
for (p = dialog_state.getc_callbacks, q = 0; p != 0; p = q) {
|
|
q = p->next;
|
|
if ((p->handle_input != 0) && p->input_ready) {
|
|
p->input_ready = FALSE;
|
|
if (state == ERR) {
|
|
state = curs_set(0);
|
|
}
|
|
if (p->handle_input(p)) {
|
|
result = TRUE;
|
|
}
|
|
}
|
|
}
|
|
if (result) {
|
|
(void) wmove(win, cur_y, cur_x); /* Restore cursor position */
|
|
wrefresh(win);
|
|
curs_set(state);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
static bool
|
|
may_handle_inputs(void)
|
|
{
|
|
bool result = FALSE;
|
|
|
|
DIALOG_CALLBACK *p;
|
|
|
|
for (p = dialog_state.getc_callbacks; p != 0; p = p->next) {
|
|
if (p->input != 0) {
|
|
result = TRUE;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* Check any any inputs registered via callbacks, to see if there is any input
|
|
* available. If there is, return a file-descriptor which should be read.
|
|
* Otherwise, return -1.
|
|
*/
|
|
static int
|
|
check_inputs(void)
|
|
{
|
|
DIALOG_CALLBACK *p;
|
|
fd_set read_fds;
|
|
struct timeval test;
|
|
int last_fd = -1;
|
|
int fd;
|
|
int found;
|
|
int result = -1;
|
|
|
|
if ((p = dialog_state.getc_callbacks) != 0) {
|
|
FD_ZERO(&read_fds);
|
|
|
|
while (p != 0) {
|
|
p->input_ready = FALSE;
|
|
if (p->input != 0 && (fd = fileno(p->input)) >= 0) {
|
|
FD_SET(fd, &read_fds);
|
|
if (last_fd < fd)
|
|
last_fd = fd;
|
|
}
|
|
p = p->next;
|
|
}
|
|
|
|
test.tv_sec = 0;
|
|
test.tv_usec = WTIMEOUT_VAL * 1000;
|
|
found = select(last_fd + 1, &read_fds,
|
|
(fd_set *) 0,
|
|
(fd_set *) 0,
|
|
&test);
|
|
|
|
if (found > 0) {
|
|
for (p = dialog_state.getc_callbacks; p != 0; p = p->next) {
|
|
if (p->input != 0
|
|
&& (fd = fileno(p->input)) >= 0
|
|
&& FD_ISSET(fd, &read_fds)) {
|
|
p->input_ready = TRUE;
|
|
result = fd;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
int
|
|
dlg_getc_callbacks(int ch, int fkey, int *result)
|
|
{
|
|
int code = FALSE;
|
|
DIALOG_CALLBACK *p, *q;
|
|
|
|
if ((p = dialog_state.getc_callbacks) != 0) {
|
|
if (check_inputs() >= 0) {
|
|
do {
|
|
q = p->next;
|
|
if (p->input_ready) {
|
|
if (!(p->handle_getc(p, ch, fkey, result))) {
|
|
dlg_remove_callback(p);
|
|
}
|
|
}
|
|
} while ((p = q) != 0);
|
|
}
|
|
code = (dialog_state.getc_callbacks != 0);
|
|
}
|
|
return code;
|
|
}
|
|
|
|
static void
|
|
dlg_raise_window(WINDOW *win)
|
|
{
|
|
touchwin(win);
|
|
wmove(win, getcury(win), getcurx(win));
|
|
wnoutrefresh(win);
|
|
doupdate();
|
|
}
|
|
|
|
/*
|
|
* This is a work-around for the case where we actually need the wide-character
|
|
* code versus a byte stream.
|
|
*/
|
|
static int last_getc = ERR;
|
|
|
|
#ifdef USE_WIDE_CURSES
|
|
static char last_getc_bytes[80];
|
|
static int have_last_getc;
|
|
static int used_last_getc;
|
|
#endif
|
|
|
|
int
|
|
dlg_last_getc(void)
|
|
{
|
|
#ifdef USE_WIDE_CURSES
|
|
if (used_last_getc != 1)
|
|
return ERR; /* not really an error... */
|
|
#endif
|
|
return last_getc;
|
|
}
|
|
|
|
void
|
|
dlg_flush_getc(void)
|
|
{
|
|
last_getc = ERR;
|
|
#ifdef USE_WIDE_CURSES
|
|
have_last_getc = 0;
|
|
used_last_getc = 0;
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Report the last key entered by the user. The 'mode' parameter controls
|
|
* the way it is separated from other results:
|
|
* -2 (no separator)
|
|
* -1 (separator after the key name)
|
|
* 0 (separator is optionally before the key name)
|
|
* 1 (same as -1)
|
|
*/
|
|
void
|
|
dlg_add_last_key(int mode)
|
|
{
|
|
if (dialog_vars.last_key) {
|
|
if (mode >= 0) {
|
|
if (mode > 0) {
|
|
dlg_add_last_key(-1);
|
|
} else {
|
|
if (dlg_need_separator())
|
|
dlg_add_separator();
|
|
dlg_add_last_key(-2);
|
|
}
|
|
} else {
|
|
char temp[80];
|
|
sprintf(temp, "%d", last_getc);
|
|
dlg_add_string(temp);
|
|
if (mode == -1)
|
|
dlg_add_separator();
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Check if the stream has been unexpectedly closed, returning false in that
|
|
* case.
|
|
*/
|
|
static bool
|
|
valid_file(FILE *fp)
|
|
{
|
|
bool code = FALSE;
|
|
int fd = fileno(fp);
|
|
|
|
if (fd >= 0) {
|
|
if (fcntl(fd, F_GETFL, 0) >= 0) {
|
|
code = TRUE;
|
|
}
|
|
}
|
|
return code;
|
|
}
|
|
|
|
static int
|
|
really_getch(WINDOW *win, int *fkey)
|
|
{
|
|
int ch;
|
|
#ifdef USE_WIDE_CURSES
|
|
int code;
|
|
mbstate_t state;
|
|
wchar_t my_wchar;
|
|
wint_t my_wint;
|
|
|
|
/*
|
|
* We get a wide character, translate it to multibyte form to avoid
|
|
* having to change the rest of the code to use wide-characters.
|
|
*/
|
|
if (used_last_getc >= have_last_getc) {
|
|
used_last_getc = 0;
|
|
have_last_getc = 0;
|
|
ch = ERR;
|
|
*fkey = 0;
|
|
code = wget_wch(win, &my_wint);
|
|
my_wchar = (wchar_t) my_wint;
|
|
switch (code) {
|
|
case KEY_CODE_YES:
|
|
ch = *fkey = my_wchar;
|
|
last_getc = my_wchar;
|
|
break;
|
|
case OK:
|
|
memset(&state, 0, sizeof(state));
|
|
have_last_getc = (int) wcrtomb(last_getc_bytes, my_wchar, &state);
|
|
if (have_last_getc < 0) {
|
|
have_last_getc = used_last_getc = 0;
|
|
last_getc_bytes[0] = (char) my_wchar;
|
|
}
|
|
ch = (int) CharOf(last_getc_bytes[used_last_getc++]);
|
|
last_getc = my_wchar;
|
|
break;
|
|
case ERR:
|
|
ch = ERR;
|
|
last_getc = ERR;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
} else {
|
|
ch = (int) CharOf(last_getc_bytes[used_last_getc++]);
|
|
}
|
|
#else
|
|
ch = wgetch(win);
|
|
last_getc = ch;
|
|
*fkey = (ch > KEY_MIN && ch < KEY_MAX);
|
|
#endif
|
|
return ch;
|
|
}
|
|
|
|
static DIALOG_CALLBACK *
|
|
next_callback(DIALOG_CALLBACK * p)
|
|
{
|
|
if ((p = dialog_state.getc_redirect) != 0) {
|
|
p = p->next;
|
|
} else {
|
|
p = dialog_state.getc_callbacks;
|
|
}
|
|
return p;
|
|
}
|
|
|
|
static DIALOG_CALLBACK *
|
|
prev_callback(DIALOG_CALLBACK * p)
|
|
{
|
|
DIALOG_CALLBACK *q;
|
|
|
|
if ((p = dialog_state.getc_redirect) != 0) {
|
|
if (p == dialog_state.getc_callbacks) {
|
|
for (p = dialog_state.getc_callbacks; p->next != 0; p = p->next) ;
|
|
} else {
|
|
for (q = dialog_state.getc_callbacks; q->next != p; q = q->next) ;
|
|
p = q;
|
|
}
|
|
} else {
|
|
p = dialog_state.getc_callbacks;
|
|
}
|
|
return p;
|
|
}
|
|
|
|
#define isBeforeChr(chr) ((chr) == before_chr && !before_fkey)
|
|
#define isBeforeFkey(chr) ((chr) == before_chr && before_fkey)
|
|
|
|
/*
|
|
* Read a character from the given window. Handle repainting here (to simplify
|
|
* things in the calling application). Also, if input-callback(s) are set up,
|
|
* poll the corresponding files and handle the updates, e.g., for displaying a
|
|
* tailbox.
|
|
*/
|
|
int
|
|
dlg_getc(WINDOW *win, int *fkey)
|
|
{
|
|
WINDOW *save_win = win;
|
|
int ch = ERR;
|
|
int before_chr;
|
|
int before_fkey;
|
|
int result;
|
|
bool done = FALSE;
|
|
bool literal = FALSE;
|
|
DIALOG_CALLBACK *p = 0;
|
|
int interval = (dialog_vars.timeout_secs * 1000);
|
|
time_t expired = time((time_t *) 0) + dialog_vars.timeout_secs;
|
|
time_t current;
|
|
|
|
if (may_handle_inputs())
|
|
wtimeout(win, WTIMEOUT_VAL);
|
|
else if (interval > 0)
|
|
wtimeout(win, interval);
|
|
|
|
while (!done) {
|
|
bool handle_others = FALSE;
|
|
|
|
/*
|
|
* If there was no pending file-input, check the keyboard.
|
|
*/
|
|
ch = really_getch(win, fkey);
|
|
if (literal) {
|
|
done = TRUE;
|
|
continue;
|
|
}
|
|
|
|
before_chr = ch;
|
|
before_fkey = *fkey;
|
|
|
|
ch = dlg_lookup_key(win, ch, fkey);
|
|
dlg_trace_chr(ch, *fkey);
|
|
|
|
current = time((time_t *) 0);
|
|
|
|
/*
|
|
* If we acquired a fkey value, then it is one of dialog's builtin
|
|
* codes such as DLGK_HELPFILE.
|
|
*/
|
|
if (!*fkey || *fkey != before_fkey) {
|
|
switch (ch) {
|
|
case CHR_LITERAL:
|
|
literal = TRUE;
|
|
keypad(win, FALSE);
|
|
continue;
|
|
case CHR_REPAINT:
|
|
(void) touchwin(win);
|
|
(void) wrefresh(curscr);
|
|
break;
|
|
case ERR: /* wtimeout() in effect; check for file I/O */
|
|
if (interval > 0
|
|
&& current >= expired) {
|
|
dlg_exiterr("timeout");
|
|
}
|
|
if (!valid_file(stdin)
|
|
|| !valid_file(dialog_state.screen_output)) {
|
|
ch = ESC;
|
|
done = TRUE;
|
|
} else if (check_inputs()) {
|
|
if (handle_inputs(win))
|
|
dlg_raise_window(win);
|
|
else
|
|
done = TRUE;
|
|
} else {
|
|
done = (interval <= 0);
|
|
}
|
|
break;
|
|
case DLGK_HELPFILE:
|
|
if (dialog_vars.help_file) {
|
|
int yold, xold;
|
|
getyx(win, yold, xold);
|
|
dialog_helpfile("HELP", dialog_vars.help_file, 0, 0);
|
|
dlg_raise_window(win);
|
|
wmove(win, yold, xold);
|
|
}
|
|
continue;
|
|
case DLGK_FIELD_PREV:
|
|
/* FALLTHRU */
|
|
case KEY_BTAB:
|
|
/* FALLTHRU */
|
|
case DLGK_FIELD_NEXT:
|
|
/* FALLTHRU */
|
|
case TAB:
|
|
/* Handle tab/backtab as a special case for traversing between
|
|
* the nominal "current" window, and other windows having
|
|
* callbacks. If the nominal (control) window closes, we'll
|
|
* close the windows with callbacks.
|
|
*/
|
|
if (dialog_state.getc_callbacks != 0 &&
|
|
(isBeforeChr(TAB) ||
|
|
isBeforeFkey(KEY_BTAB))) {
|
|
p = (isBeforeChr(TAB)
|
|
? next_callback(p)
|
|
: prev_callback(p));
|
|
if ((dialog_state.getc_redirect = p) != 0) {
|
|
win = p->win;
|
|
} else {
|
|
win = save_win;
|
|
}
|
|
dlg_raise_window(win);
|
|
break;
|
|
}
|
|
/* FALLTHRU */
|
|
default:
|
|
#ifdef NO_LEAKS
|
|
if (isBeforeChr(DLG_CTRL('P'))) {
|
|
/* for testing, ^P closes the connection */
|
|
close(0);
|
|
close(1);
|
|
close(2);
|
|
break;
|
|
}
|
|
#endif
|
|
handle_others = TRUE;
|
|
break;
|
|
#ifdef HAVE_DLG_TRACE
|
|
case CHR_TRACE:
|
|
dlg_trace_win(win);
|
|
break;
|
|
#endif
|
|
}
|
|
} else {
|
|
handle_others = TRUE;
|
|
}
|
|
|
|
if (handle_others) {
|
|
if ((p = dialog_state.getc_redirect) != 0) {
|
|
if (!(p->handle_getc(p, ch, *fkey, &result))) {
|
|
done = (p->win == save_win) && (!p->keep_win);
|
|
dlg_remove_callback(p);
|
|
dialog_state.getc_redirect = 0;
|
|
win = save_win;
|
|
}
|
|
} else {
|
|
done = TRUE;
|
|
}
|
|
}
|
|
}
|
|
if (literal)
|
|
keypad(win, TRUE);
|
|
return ch;
|
|
}
|
|
|
|
static void
|
|
finish_bg(int sig GCC_UNUSED)
|
|
{
|
|
end_dialog();
|
|
dlg_exit(DLG_EXIT_ERROR);
|
|
}
|
|
|
|
/*
|
|
* If we have callbacks active, purge the list of all that are not marked
|
|
* to keep in the background. If any remain, run those in a background
|
|
* process.
|
|
*/
|
|
void
|
|
dlg_killall_bg(int *retval)
|
|
{
|
|
DIALOG_CALLBACK *cb;
|
|
int pid;
|
|
#ifdef HAVE_TYPE_UNIONWAIT
|
|
union wait wstatus;
|
|
#else
|
|
int wstatus;
|
|
#endif
|
|
|
|
if ((cb = dialog_state.getc_callbacks) != 0) {
|
|
while (cb != 0) {
|
|
if (cb->keep_bg) {
|
|
cb = cb->next;
|
|
} else {
|
|
dlg_remove_callback(cb);
|
|
cb = dialog_state.getc_callbacks;
|
|
}
|
|
}
|
|
if (dialog_state.getc_callbacks != 0) {
|
|
|
|
refresh();
|
|
fflush(stdout);
|
|
fflush(stderr);
|
|
reset_shell_mode();
|
|
if ((pid = fork()) != 0) {
|
|
_exit(pid > 0 ? DLG_EXIT_OK : DLG_EXIT_ERROR);
|
|
} else if (pid == 0) { /* child */
|
|
if ((pid = fork()) != 0) {
|
|
/*
|
|
* Echo the process-id of the grandchild so a shell script
|
|
* can read that, and kill that process. We'll wait around
|
|
* until then. Our parent has already left, leaving us
|
|
* temporarily orphaned.
|
|
*/
|
|
if (pid > 0) { /* parent */
|
|
fprintf(stderr, "%d\n", pid);
|
|
fflush(stderr);
|
|
}
|
|
/* wait for child */
|
|
#ifdef HAVE_WAITPID
|
|
while (-1 == waitpid(pid, &wstatus, 0)) {
|
|
#ifdef EINTR
|
|
if (errno == EINTR)
|
|
continue;
|
|
#endif /* EINTR */
|
|
#ifdef ERESTARTSYS
|
|
if (errno == ERESTARTSYS)
|
|
continue;
|
|
#endif /* ERESTARTSYS */
|
|
break;
|
|
}
|
|
#else
|
|
while (wait(&wstatus) != pid) /* do nothing */
|
|
;
|
|
#endif
|
|
_exit(WEXITSTATUS(wstatus));
|
|
} else if (pid == 0) {
|
|
if (!dialog_vars.cant_kill)
|
|
(void) signal(SIGHUP, finish_bg);
|
|
(void) signal(SIGINT, finish_bg);
|
|
(void) signal(SIGQUIT, finish_bg);
|
|
(void) signal(SIGSEGV, finish_bg);
|
|
while (dialog_state.getc_callbacks != 0) {
|
|
int fkey = 0;
|
|
dlg_getc_callbacks(ERR, fkey, retval);
|
|
napms(1000);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|