#include <curses.priv.h>
MODULE_ID("$Id: lib_getch.c,v 1.71 2003/05/17 23:49:28 tom Exp $")
#include <fifo_defs.h>
NCURSES_EXPORT_VAR(int)
ESCDELAY = 1000;
#ifdef NCURSES_WGETCH_EVENTS
#define TWAIT_MASK 7
#else
#define TWAIT_MASK 3
#endif
static int
check_mouse_activity(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(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 inline int
fifo_peek(void)
{
int ch = SP->_fifo[peek];
TR(TRACE_IEVENT, ("peeking at %d", peek));
p_inc();
return ch;
}
static inline int
fifo_pull(void)
{
int ch;
ch = SP->_fifo[head];
TR(TRACE_IEVENT, ("pulling %s from %d", _tracechar(ch), head));
if (peek == head) {
h_inc();
peek = head;
} else
h_inc();
#ifdef TRACE
if (_nc_tracing & TRACE_IEVENT)
_nc_fifo_dump();
#endif
return ch;
}
static inline int
fifo_push(EVENTLIST_0th(_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(-1 EVENTLIST_2nd(evl));
} else
mask = 0;
if (mask & 4) {
T(("fifo_push: ungetch KEY_EVENT"));
ungetch(KEY_EVENT);
return KEY_EVENT;
}
#elif USE_GPM_SUPPORT || USE_EMX_MOUSE || USE_SYSMOUSE
if (SP->_mouse_fd >= 0) {
mask = check_mouse_activity(-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", _tracechar(ch), tail));
#ifdef TRACE
if (_nc_tracing & TRACE_IEVENT)
_nc_fifo_dump();
#endif
return ch;
}
static inline void
fifo_clear(void)
{
memset(SP->_fifo, 0, sizeof(SP->_fifo));
head = -1;
tail = peek = 0;
}
static int kgetch(EVENTLIST_0th(_nc_eventlist * evl));
#define wgetch_should_refresh(win) (\
(is_wintouched(win) || (win->_flags & _HASMOVED)) \
&& !(win->_flags & _ISPAD))
NCURSES_EXPORT(int)
_nc_wgetch(WINDOW *win,
unsigned long *result,
int use_meta
EVENTLIST_2nd(_nc_eventlist * evl))
{
int ch;
#ifdef NCURSES_WGETCH_EVENTS
long event_delay = -1;
#endif
T((T_CALLED("_nc_wgetch(%p)"), win));
*result = 0;
if (!win)
returnCode(ERR);
if (cooked_key_in_fifo()) {
if (wgetch_should_refresh(win))
wrefresh(win);
*result = fifo_pull();
returnCode(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], *sp;
int rc;
TR(TRACE_IEVENT, ("filling queue in cooked mode"));
SP->_called_wgetch = TRUE;
rc = wgetnstr(win, buf, MAXCOLUMNS);
SP->_called_wgetch = FALSE;
#ifdef NCURSES_WGETCH_EVENTS
if (rc != KEY_EVENT)
#endif
ungetch('\n');
for (sp = buf + strlen(buf); sp > buf; sp--)
ungetch(sp[-1]);
#ifdef NCURSES_WGETCH_EVENTS
if (rc == KEY_EVENT) {
*result = rc;
returnCode(OK);
}
#endif
*result = fifo_pull();
returnCode(OK);
}
if (win->_use_keypad != SP->_keypad_on)
_nc_keypad(win->_use_keypad);
if (wgetch_should_refresh(win))
wrefresh(win);
if (!win->_notimeout && (win->_delay >= 0 || SP->_cbreak > 1)) {
int delay;
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));
if (head == -1) {
int rc = check_mouse_activity(delay EVENTLIST_2nd(evl));
#ifdef NCURSES_WGETCH_EVENTS
if (rc & 4) {
*result = KEY_EVENT;
returnCode(OK);
}
#endif
if (!rc)
returnCode(ERR);
}
}
if (win->_use_keypad) {
int runcount = 0;
int rc;
do {
ch = kgetch(EVENTLIST_1st(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->_maxclick
EVENTLIST_2nd(evl))) != 0
&& !(rc & 4))
|| !SP->_mouse_parse(runcount)));
#ifdef NCURSES_WGETCH_EVENTS
if ((rc & 4) && !ch == KEY_EVENT) {
ungetch(ch);
ch = KEY_EVENT;
}
#endif
if (runcount > 0 && ch != KEY_MOUSE) {
#ifdef NCURSES_WGETCH_EVENTS
if (ch == KEY_EVENT) {
ungetch(KEY_MOUSE);
} else
#endif
{
ungetch(ch);
ch = KEY_MOUSE;
}
}
} else {
if (head == -1)
fifo_push(EVENTLIST_1st(evl));
ch = fifo_pull();
}
if (ch == ERR) {
#if USE_SIZECHANGE
if (SP->_sig_winch) {
_nc_update_screensize();
if (cooked_key_in_fifo()) {
*result = fifo_pull();
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", _tracechar(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,
SP->_use_meta
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,
SP->_use_meta
EVENTLIST_2nd((_nc_eventlist *) 0));
if (code != ERR)
code = value;
returnCode(code);
}
static int
kgetch(EVENTLIST_0th(_nc_eventlist * evl))
{
struct tries *ptr;
int ch = 0;
int timeleft = ESCDELAY;
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(EVENTLIST_1st(evl));
if (ch == ERR) {
peek = head;
return ERR;
}
#ifdef NCURSES_WGETCH_EVENTS
else if (ch == KEY_EVENT) {
peek = head;
return fifo_pull();
}
#endif
}
ch = fifo_peek();
if (ch >= KEY_MIN) {
peek = head;
t_dec();
return ch;
}
TR(TRACE_IEVENT, ("ch: %s", _tracechar((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();
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(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();
peek = head;
return ch;
}