#include <curses.priv.h>
MODULE_ID("$Id: lib_getch.c,v 1.99 2008/09/20 19:46:13 tom Exp $")
#include <fifo_defs.h>
#if USE_REENTRANT
#define GetEscdelay(sp) (sp)->_ESCDELAY
NCURSES_EXPORT(int)
NCURSES_PUBLIC_VAR(ESCDELAY) (void)
{
return SP ? GetEscdelay(SP) : 1000;
}
#else
#define GetEscdelay(sp) ESCDELAY
NCURSES_EXPORT_VAR(int)
ESCDELAY = 1000;
#endif
#if NCURSES_EXT_FUNCS
NCURSES_EXPORT(int)
set_escdelay(int value)
{
int code = OK;
#if USE_REENTRANT
if (SP) {
SP->_ESCDELAY = value;
} else {
code = ERR;
}
#else
ESCDELAY = value;
#endif
return code;
}
#endif
static int
_nc_use_meta(WINDOW *win)
{
SCREEN *sp = _nc_screen_of(win);
return (sp ? sp->_use_meta : 0);
}
#ifdef NCURSES_WGETCH_EVENTS
#define TWAIT_MASK 7
#else
#define TWAIT_MASK 3
#endif
static int
check_mouse_activity(SCREEN *sp, int delay EVENTLIST_2nd(_nc_eventlist * evl))
{
int rc;
#if USE_SYSMOUSE
if ((sp->_mouse_type == M_SYSMOUSE)
&& (sp->_sysmouse_head < sp->_sysmouse_tail)) {
return 2;
}
#endif
rc = _nc_timed_wait(sp, TWAIT_MASK, delay, (int *) 0 EVENTLIST_2nd(evl));
#if USE_SYSMOUSE
if ((sp->_mouse_type == M_SYSMOUSE)
&& (sp->_sysmouse_head < sp->_sysmouse_tail)
&& (rc == 0)
&& (errno == EINTR)) {
rc |= 2;
}
#endif
return rc;
}
static NCURSES_INLINE int
fifo_peek(SCREEN *sp)
{
int ch = sp->_fifo[peek];
TR(TRACE_IEVENT, ("peeking at %d", peek));
p_inc();
return ch;
}
static NCURSES_INLINE int
fifo_pull(SCREEN *sp)
{
int ch;
ch = sp->_fifo[head];
TR(TRACE_IEVENT, ("pulling %s from %d", _nc_tracechar(sp, ch), head));
if (peek == head) {
h_inc();
peek = head;
} else
h_inc();
#ifdef TRACE
if (USE_TRACEF(TRACE_IEVENT)) {
_nc_fifo_dump(sp);
_nc_unlock_global(tracef);
}
#endif
return ch;
}
static NCURSES_INLINE int
fifo_push(SCREEN *sp EVENTLIST_2nd(_nc_eventlist * evl))
{
int n;
int ch = 0;
int mask = 0;
(void) mask;
if (tail == -1)
return ERR;
#ifdef HIDE_EINTR
again:
errno = 0;
#endif
#ifdef NCURSES_WGETCH_EVENTS
if (evl
#if USE_GPM_SUPPORT || USE_EMX_MOUSE || USE_SYSMOUSE
|| (sp->_mouse_fd >= 0)
#endif
) {
mask = check_mouse_activity(sp, -1 EVENTLIST_2nd(evl));
} else
mask = 0;
if (mask & 4) {
T(("fifo_push: ungetch KEY_EVENT"));
_nc_ungetch(sp, KEY_EVENT);
return KEY_EVENT;
}
#elif USE_GPM_SUPPORT || USE_EMX_MOUSE || USE_SYSMOUSE
if (sp->_mouse_fd >= 0) {
mask = check_mouse_activity(sp, -1 EVENTLIST_2nd(evl));
}
#endif
#if USE_GPM_SUPPORT || USE_EMX_MOUSE
if ((sp->_mouse_fd >= 0) && (mask & 2)) {
sp->_mouse_event(sp);
ch = KEY_MOUSE;
n = 1;
} else
#endif
#if USE_SYSMOUSE
if ((sp->_mouse_type == M_SYSMOUSE)
&& (sp->_sysmouse_head < sp->_sysmouse_tail)) {
sp->_mouse_event(sp);
ch = KEY_MOUSE;
n = 1;
} else if ((sp->_mouse_type == M_SYSMOUSE)
&& (mask <= 0) && errno == EINTR) {
sp->_mouse_event(sp);
ch = KEY_MOUSE;
n = 1;
} else
#endif
{
unsigned char c2 = 0;
n = read(sp->_ifd, &c2, 1);
ch = c2;
}
#ifdef HIDE_EINTR
if (n <= 0 && errno == EINTR)
goto again;
#endif
if ((n == -1) || (n == 0)) {
TR(TRACE_IEVENT, ("read(%d,&ch,1)=%d, errno=%d", sp->_ifd, n, errno));
ch = ERR;
}
TR(TRACE_IEVENT, ("read %d characters", n));
sp->_fifo[tail] = ch;
sp->_fifohold = 0;
if (head == -1)
head = peek = tail;
t_inc();
TR(TRACE_IEVENT, ("pushed %s at %d", _nc_tracechar(sp, ch), tail));
#ifdef TRACE
if (USE_TRACEF(TRACE_IEVENT)) {
_nc_fifo_dump(sp);
_nc_unlock_global(tracef);
}
#endif
return ch;
}
static NCURSES_INLINE void
fifo_clear(SCREEN *sp)
{
memset(sp->_fifo, 0, sizeof(sp->_fifo));
head = -1;
tail = peek = 0;
}
static int kgetch(SCREEN *EVENTLIST_2nd(_nc_eventlist * evl));
static void
recur_wrefresh(WINDOW *win)
{
#ifdef USE_PTHREADS
SCREEN *sp = _nc_screen_of(win);
if (_nc_use_pthreads && sp != SP) {
SCREEN *save_SP;
_nc_lock_global(curses);
save_SP = SP;
_nc_set_screen(sp);
recur_wrefresh(win);
_nc_set_screen(save_SP);
_nc_unlock_global(curses);
} else
#endif
if ((is_wintouched(win) || (win->_flags & _HASMOVED))
&& !(win->_flags & _ISPAD)) {
wrefresh(win);
}
}
static int
recur_wgetnstr(WINDOW *win, char *buf)
{
SCREEN *sp = _nc_screen_of(win);
int rc;
if (sp != 0) {
#ifdef USE_PTHREADS
if (_nc_use_pthreads && sp != SP) {
SCREEN *save_SP;
_nc_lock_global(curses);
save_SP = SP;
_nc_set_screen(sp);
rc = recur_wgetnstr(win, buf);
_nc_set_screen(save_SP);
_nc_unlock_global(curses);
} else
#endif
{
sp->_called_wgetch = TRUE;
rc = wgetnstr(win, buf, MAXCOLUMNS);
sp->_called_wgetch = FALSE;
}
} else {
rc = ERR;
}
return rc;
}
NCURSES_EXPORT(int)
_nc_wgetch(WINDOW *win,
unsigned long *result,
int use_meta
EVENTLIST_2nd(_nc_eventlist * evl))
{
SCREEN *sp;
int ch;
#ifdef NCURSES_WGETCH_EVENTS
long event_delay = -1;
#endif
T((T_CALLED("_nc_wgetch(%p)"), win));
*result = 0;
sp = _nc_screen_of(win);
if (win == 0 || sp == 0) {
returnCode(ERR);
}
if (cooked_key_in_fifo()) {
recur_wrefresh(win);
*result = fifo_pull(sp);
returnCode(*result >= KEY_MIN ? KEY_CODE_YES : OK);
}
#ifdef NCURSES_WGETCH_EVENTS
if (evl && (evl->count == 0))
evl = NULL;
event_delay = _nc_eventlist_timeout(evl);
#endif
if (head == -1 &&
!sp->_notty &&
!sp->_raw &&
!sp->_cbreak &&
!sp->_called_wgetch) {
char buf[MAXCOLUMNS], *bufp;
int rc;
TR(TRACE_IEVENT, ("filling queue in cooked mode"));
rc = recur_wgetnstr(win, buf);
#ifdef NCURSES_WGETCH_EVENTS
if (rc != KEY_EVENT)
#endif
_nc_ungetch(sp, '\n');
for (bufp = buf + strlen(buf); bufp > buf; bufp--)
_nc_ungetch(sp, bufp[-1]);
#ifdef NCURSES_WGETCH_EVENTS
if (rc == KEY_EVENT) {
*result = rc;
} else
#endif
*result = fifo_pull(sp);
returnCode(*result >= KEY_MIN ? KEY_CODE_YES : OK);
}
if (win->_use_keypad != sp->_keypad_on)
_nc_keypad(sp, win->_use_keypad);
recur_wrefresh(win);
if (win->_notimeout || (win->_delay >= 0) || (sp->_cbreak > 1)) {
if (head == -1) {
int delay;
int rc;
TR(TRACE_IEVENT, ("timed delay in wgetch()"));
if (sp->_cbreak > 1)
delay = (sp->_cbreak - 1) * 100;
else
delay = win->_delay;
#ifdef NCURSES_WGETCH_EVENTS
if (event_delay >= 0 && delay > event_delay)
delay = event_delay;
#endif
TR(TRACE_IEVENT, ("delay is %d milliseconds", delay));
rc = check_mouse_activity(sp, delay EVENTLIST_2nd(evl));
#ifdef NCURSES_WGETCH_EVENTS
if (rc & 4) {
*result = KEY_EVENT;
returnCode(KEY_CODE_YES);
}
#endif
if (!rc) {
returnCode(ERR);
}
}
}
if (win->_use_keypad) {
int runcount = 0;
int rc;
do {
ch = kgetch(sp EVENTLIST_2nd(evl));
if (ch == KEY_MOUSE) {
++runcount;
if (sp->_mouse_inline(sp))
break;
}
if (sp->_maxclick < 0)
break;
} while
(ch == KEY_MOUSE
&& (((rc = check_mouse_activity(sp, sp->_maxclick
EVENTLIST_2nd(evl))) != 0
&& !(rc & 4))
|| !sp->_mouse_parse(sp, runcount)));
#ifdef NCURSES_WGETCH_EVENTS
if ((rc & 4) && !ch == KEY_EVENT) {
_nc_ungetch(sp, ch);
ch = KEY_EVENT;
}
#endif
if (runcount > 0 && ch != KEY_MOUSE) {
#ifdef NCURSES_WGETCH_EVENTS
if (ch == KEY_EVENT) {
_nc_ungetch(sp, KEY_MOUSE);
} else
#endif
{
_nc_ungetch(sp, ch);
ch = KEY_MOUSE;
}
}
} else {
if (head == -1)
fifo_push(sp EVENTLIST_2nd(evl));
ch = fifo_pull(sp);
}
if (ch == ERR) {
#if USE_SIZECHANGE
if (_nc_handle_sigwinch(sp)) {
_nc_update_screensize(sp);
if (cooked_key_in_fifo()) {
*result = fifo_pull(sp);
returnCode(*result >= KEY_MIN ? KEY_CODE_YES : OK);
}
}
#endif
returnCode(ERR);
}
if (sp->_echo && !(win->_flags & _ISPAD)) {
chtype backup = (ch == KEY_BACKSPACE) ? '\b' : ch;
if (backup < KEY_MIN)
wechochar(win, backup);
}
if ((ch == '\r') && sp->_nl)
ch = '\n';
if (!use_meta)
if ((ch < KEY_MIN) && (ch & 0x80))
ch &= 0x7f;
T(("wgetch returning : %s", _nc_tracechar(sp, ch)));
*result = ch;
returnCode(ch >= KEY_MIN ? KEY_CODE_YES : OK);
}
#ifdef NCURSES_WGETCH_EVENTS
NCURSES_EXPORT(int)
wgetch_events(WINDOW *win, _nc_eventlist * evl)
{
int code;
unsigned long value;
T((T_CALLED("wgetch_events(%p,%p)"), win, evl));
code = _nc_wgetch(win,
&value,
_nc_use_meta(win)
EVENTLIST_2nd(evl));
if (code != ERR)
code = value;
returnCode(code);
}
#endif
NCURSES_EXPORT(int)
wgetch(WINDOW *win)
{
int code;
unsigned long value;
T((T_CALLED("wgetch(%p)"), win));
code = _nc_wgetch(win,
&value,
_nc_use_meta(win)
EVENTLIST_2nd((_nc_eventlist *) 0));
if (code != ERR)
code = value;
returnCode(code);
}
static int
kgetch(SCREEN *sp EVENTLIST_2nd(_nc_eventlist * evl))
{
TRIES *ptr;
int ch = 0;
int timeleft = GetEscdelay(sp);
TR(TRACE_IEVENT, ("kgetch() called"));
ptr = sp->_keytry;
for (;;) {
if (cooked_key_in_fifo() && sp->_fifo[head] >= KEY_MIN) {
break;
} else if (!raw_key_in_fifo()) {
ch = fifo_push(sp EVENTLIST_2nd(evl));
if (ch == ERR) {
peek = head;
return ERR;
}
#ifdef NCURSES_WGETCH_EVENTS
else if (ch == KEY_EVENT) {
peek = head;
return fifo_pull(sp);
}
#endif
}
ch = fifo_peek(sp);
if (ch >= KEY_MIN) {
peek = head;
t_dec();
return ch;
}
TR(TRACE_IEVENT, ("ch: %s", _nc_tracechar(sp, (unsigned char) ch)));
while ((ptr != NULL) && (ptr->ch != (unsigned char) ch))
ptr = ptr->sibling;
if (ptr == NULL) {
TR(TRACE_IEVENT, ("ptr is null"));
break;
}
TR(TRACE_IEVENT, ("ptr=%p, ch=%d, value=%d",
ptr, ptr->ch, ptr->value));
if (ptr->value != 0) {
TR(TRACE_IEVENT, ("end of sequence"));
if (peek == tail)
fifo_clear(sp);
else
head = peek;
return (ptr->value);
}
ptr = ptr->child;
if (!raw_key_in_fifo()) {
int rc;
TR(TRACE_IEVENT, ("waiting for rest of sequence"));
rc = check_mouse_activity(sp, timeleft EVENTLIST_2nd(evl));
#ifdef NCURSES_WGETCH_EVENTS
if (rc & 4) {
TR(TRACE_IEVENT, ("interrupted by a user event"));
peek = head;
return KEY_EVENT;
}
#endif
if (!rc) {
TR(TRACE_IEVENT, ("ran out of time"));
break;
}
}
}
ch = fifo_pull(sp);
peek = head;
return ch;
}