/****************************************************************************
- * Copyright (c) 1998 Free Software Foundation, Inc. *
+ * Copyright (c) 1998,1999,2000 Free Software Foundation, Inc. *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the *
#include <curses.priv.h>
-MODULE_ID("$Id: lib_getch.c,v 1.43 1999/03/08 02:35:10 tom Exp $")
+MODULE_ID("$Id: lib_getch.c,v 1.48 2000/07/08 11:21:51 tom Exp $")
#include <fifo_defs.h>
-int ESCDELAY = 1000; /* max interval betw. chars in funkeys, in millisecs */
+int ESCDELAY = 1000; /* max interval betw. chars in funkeys, in millisecs */
#ifdef USE_EMX_MOUSE
# include <sys/select.h>
static int
kbd_mouse_read(unsigned char *p)
{
-fd_set fdset;
-int nums = SP->_ifd+1;
-
- for (;;) {
- FD_ZERO(&fdset);
- FD_SET(SP->_checkfd, &fdset);
- if (SP->_mouse_fd >= 0) {
- FD_SET(SP->_mouse_fd, &fdset);
- if (SP->_mouse_fd > SP->_checkfd)
- nums = SP->_mouse_fd+1;
- }
- if (select(nums, &fdset, NULL, NULL, NULL) >= 0) {
- int n;
-
- if (FD_ISSET(SP->_mouse_fd, &fdset)) /* Prefer mouse */
- n = read(SP->_mouse_fd, p, 1);
- else
- n = read(SP->_ifd, p, 1);
- return n;
- }
- if (errno != EINTR)
- return -1;
+ fd_set fdset;
+ int nums = SP->_ifd + 1;
+
+ for (;;) {
+ FD_ZERO(&fdset);
+ FD_SET(SP->_ifd, &fdset);
+ if (SP->_checkfd >= 0) {
+ FD_SET(SP->_checkfd, &fdset);
+ if (SP->_checkfd >= nums)
+ nums = SP->_checkfd + 1;
}
+ if (SP->_mouse_fd >= 0) {
+ FD_SET(SP->_mouse_fd, &fdset);
+ if (SP->_mouse_fd >= nums)
+ nums = SP->_mouse_fd + 1;
+ }
+ if (select(nums, &fdset, NULL, NULL, NULL) >= 0) {
+ int n;
+
+ if (SP->_mouse_fd >= 0
+ && FD_ISSET(SP->_mouse_fd, &fdset)) { /* Prefer mouse */
+ n = read(SP->_mouse_fd, p, 1);
+ } else {
+ n = read(SP->_ifd, p, 1);
+ }
+ return n;
+ }
+ if (errno != EINTR) {
+ return -1;
+ }
+ }
}
-#endif /* USE_EMX_MOUSE */
+#endif /* USE_EMX_MOUSE */
-static inline int fifo_peek(void)
+static inline int
+fifo_peek(void)
{
- int ch = SP->_fifo[peek];
- T(("peeking at %d", peek));
+ int ch = SP->_fifo[peek];
+ T(("peeking at %d", peek));
- p_inc();
- return ch;
+ p_inc();
+ return ch;
}
-
-static inline int fifo_pull(void)
+static inline int
+fifo_pull(void)
{
-int ch;
- ch = SP->_fifo[head];
- T(("pulling %d from %d", ch, head));
+ int ch;
+ ch = SP->_fifo[head];
+ T(("pulling %d from %d", ch, head));
- if (peek == head)
- {
- h_inc();
- peek = head;
- }
- else
- h_inc();
+ if (peek == head) {
+ h_inc();
+ peek = head;
+ } else
+ h_inc();
#ifdef TRACE
- if (_nc_tracing & TRACE_IEVENT) _nc_fifo_dump();
+ if (_nc_tracing & TRACE_IEVENT)
+ _nc_fifo_dump();
#endif
- return ch;
+ return ch;
}
-static inline int fifo_push(void)
+static inline int
+fifo_push(void)
{
-int n;
-unsigned int ch;
+ int n;
+ unsigned int ch;
- if (tail == -1) return ERR;
+ if (tail == -1)
+ return ERR;
#ifdef HIDE_EINTR
-again:
- errno = 0;
+ again:
+ errno = 0;
#endif
#if USE_GPM_SUPPORT
- if ((SP->_mouse_fd >= 0)
- && (_nc_timed_wait(3, -1, (int *)0) & 2))
- {
- SP->_mouse_event(SP);
- ch = KEY_MOUSE;
- n = 1;
- } else
+ if ((SP->_mouse_fd >= 0)
+ && (_nc_timed_wait(3, -1, (int *) 0) & 2)) {
+ SP->_mouse_event(SP);
+ ch = KEY_MOUSE;
+ n = 1;
+ } else
#endif
- {
- unsigned char c2=0;
+ {
+ unsigned char c2 = 0;
#ifdef USE_EMX_MOUSE
- n = kbd_mouse_read(&c2);
+ n = kbd_mouse_read(&c2);
#else
- n = read(SP->_ifd, &c2, 1);
+ n = read(SP->_ifd, &c2, 1);
#endif
- ch = c2 & 0xff;
- }
+ ch = c2 & 0xff;
+ }
#ifdef HIDE_EINTR
- /*
- * Under System V curses with non-restarting signals, getch() returns
- * with value ERR when a handled signal keeps it from completing.
- * If signals restart system calls, OTOH, the signal is invisible
- * except to its handler.
- *
- * We don't want this difference to show. This piece of code
- * tries to make it look like we always have restarting signals.
- */
- if (n <= 0 && errno == EINTR)
- goto again;
+ /*
+ * Under System V curses with non-restarting signals, getch() returns
+ * with value ERR when a handled signal keeps it from completing.
+ * If signals restart system calls, OTOH, the signal is invisible
+ * except to its handler.
+ *
+ * We don't want this difference to show. This piece of code
+ * tries to make it look like we always have restarting signals.
+ */
+ if (n <= 0 && errno == EINTR)
+ goto again;
#endif
- if ((n == -1) || (n == 0))
- {
- T(("read(%d,&ch,1)=%d, errno=%d", SP->_ifd, n, errno));
- return ERR;
- }
- T(("read %d characters", n));
-
- SP->_fifo[tail] = ch;
- SP->_fifohold = 0;
- if (head == -1)
- head = peek = tail;
- t_inc();
- T(("pushed %#x at %d", ch, tail));
+ if ((n == -1) || (n == 0)) {
+ T(("read(%d,&ch,1)=%d, errno=%d", SP->_ifd, n, errno));
+ ch = ERR;
+ }
+ T(("read %d characters", n));
+
+ SP->_fifo[tail] = ch;
+ SP->_fifohold = 0;
+ if (head == -1)
+ head = peek = tail;
+ t_inc();
+ T(("pushed %#x at %d", ch, tail));
#ifdef TRACE
- if (_nc_tracing & TRACE_IEVENT) _nc_fifo_dump();
+ if (_nc_tracing & TRACE_IEVENT)
+ _nc_fifo_dump();
#endif
- return ch;
+ return ch;
}
-static inline void fifo_clear(void)
+static inline void
+fifo_clear(void)
{
-int i;
- for (i = 0; i < FIFO_SIZE; i++)
- SP->_fifo[i] = 0;
- head = -1; tail = peek = 0;
+ int i;
+ for (i = 0; i < FIFO_SIZE; i++)
+ SP->_fifo[i] = 0;
+ head = -1;
+ tail = peek = 0;
}
static int kgetch(WINDOW *);
int
wgetch(WINDOW *win)
{
-int ch;
+ int ch;
- T((T_CALLED("wgetch(%p)"), win));
+ T((T_CALLED("wgetch(%p)"), win));
- if (!win)
- returnCode(ERR);
+ if (!win)
+ returnCode(ERR);
- if (cooked_key_in_fifo())
- {
- if (wgetch_should_refresh(win))
- wrefresh(win);
+ if (cooked_key_in_fifo()) {
+ if (wgetch_should_refresh(win))
+ wrefresh(win);
- ch = fifo_pull();
- T(("wgetch returning (pre-cooked): %#x = %s", ch, _trace_key(ch));)
- returnCode(ch);
- }
+ ch = fifo_pull();
+ T(("wgetch returning (pre-cooked): %#x = %s", ch, _trace_key(ch)));
+ returnCode(ch);
+ }
- /*
- * Handle cooked mode. Grab a string from the screen,
- * stuff its contents in the FIFO queue, and pop off
- * the first character to return it.
- */
- if (head == -1 && !SP->_raw && !SP->_cbreak)
- {
- char buf[MAXCOLUMNS], *sp;
+ /*
+ * Handle cooked mode. Grab a string from the screen,
+ * stuff its contents in the FIFO queue, and pop off
+ * the first character to return it.
+ */
+ if (head == -1 && !SP->_raw && !SP->_cbreak) {
+ char buf[MAXCOLUMNS], *sp;
- T(("filling queue in cooked mode"));
+ T(("filling queue in cooked mode"));
- wgetnstr(win, buf, MAXCOLUMNS);
+ wgetnstr(win, buf, MAXCOLUMNS);
- /* ungetch in reverse order */
- ungetch('\n');
- for (sp = buf+strlen(buf); sp>buf; sp--)
- ungetch(sp[-1]);
+ /* ungetch in reverse order */
+ ungetch('\n');
+ for (sp = buf + strlen(buf); sp > buf; sp--)
+ ungetch(sp[-1]);
- returnCode(fifo_pull());
- }
+ returnCode(fifo_pull());
+ }
- if (wgetch_should_refresh(win))
- wrefresh(win);
+ if (wgetch_should_refresh(win))
+ wrefresh(win);
- if (!win->_notimeout && (win->_delay >= 0 || SP->_cbreak > 1))
- {
- int delay;
+ if (!win->_notimeout && (win->_delay >= 0 || SP->_cbreak > 1)) {
+ int delay;
- T(("timed delay in wgetch()"));
- if (SP->_cbreak > 1)
- delay = (SP->_cbreak - 1) * 100;
- else
- delay = win->_delay;
+ T(("timed delay in wgetch()"));
+ if (SP->_cbreak > 1)
+ delay = (SP->_cbreak - 1) * 100;
+ else
+ delay = win->_delay;
- T(("delay is %d milliseconds", delay));
+ T(("delay is %d milliseconds", delay));
- if (head == -1) /* fifo is empty */
- if (!_nc_timed_wait(3, delay, (int *)0))
- returnCode(ERR);
- /* else go on to read data available */
- }
+ if (head == -1) /* fifo is empty */
+ if (!_nc_timed_wait(3, delay, (int *) 0))
+ returnCode(ERR);
+ /* else go on to read data available */
+ }
- if (win->_use_keypad)
- {
- /*
- * This is tricky. We only want to get special-key
- * events one at a time. But we want to accumulate
- * mouse events until either (a) the mouse logic tells
- * us it's picked up a complete gesture, or (b)
- * there's a detectable time lapse after one.
- *
- * Note: if the mouse code starts failing to compose
- * press/release events into clicks, you should probably
- * increase the wait with mouseinterval().
- */
- int runcount = 0;
-
- do {
- ch = kgetch(win);
- if (ch == KEY_MOUSE)
- {
- ++runcount;
- if (SP->_mouse_inline(SP))
- break;
- }
- } while
- (ch == KEY_MOUSE
- && (_nc_timed_wait(3, SP->_maxclick, (int *)0)
- || !SP->_mouse_parse(runcount)));
- if (runcount > 0 && ch != KEY_MOUSE)
- {
- /* mouse event sequence ended by keystroke, push it */
- ungetch(ch);
- ch = KEY_MOUSE;
- }
- } else {
- if (head == -1)
- fifo_push();
- ch = fifo_pull();
+ if (win->_use_keypad) {
+ /*
+ * This is tricky. We only want to get special-key
+ * events one at a time. But we want to accumulate
+ * mouse events until either (a) the mouse logic tells
+ * us it's picked up a complete gesture, or (b)
+ * there's a detectable time lapse after one.
+ *
+ * Note: if the mouse code starts failing to compose
+ * press/release events into clicks, you should probably
+ * increase the wait with mouseinterval().
+ */
+ int runcount = 0;
+
+ do {
+ ch = kgetch(win);
+ if (ch == KEY_MOUSE) {
+ ++runcount;
+ if (SP->_mouse_inline(SP))
+ break;
+ }
+ } while
+ (ch == KEY_MOUSE
+ && (_nc_timed_wait(3, SP->_maxclick, (int *) 0)
+ || !SP->_mouse_parse(runcount)));
+ if (runcount > 0 && ch != KEY_MOUSE) {
+ /* mouse event sequence ended by keystroke, push it */
+ ungetch(ch);
+ ch = KEY_MOUSE;
}
+ } else {
+ if (head == -1)
+ fifo_push();
+ ch = fifo_pull();
+ }
- if (ch == ERR)
- {
+ if (ch == ERR) {
#if USE_SIZECHANGE
- if(SP->_sig_winch)
- {
- _nc_update_screensize();
- /* resizeterm can push KEY_RESIZE */
- if(cooked_key_in_fifo())
- {
- ch = fifo_pull();
- T(("wgetch returning (pre-cooked): %#x = %s", ch, _trace_key(ch));)
- returnCode(ch);
- }
+ if (SP->_sig_winch) {
+ _nc_update_screensize();
+ /* resizeterm can push KEY_RESIZE */
+ if (cooked_key_in_fifo()) {
+ ch = fifo_pull();
+ T(("wgetch returning (pre-cooked): %#x = %s", ch, _trace_key(ch)));
+ returnCode(ch);
}
-#endif
- T(("wgetch returning ERR"));
- returnCode(ERR);
}
-
- /*
- * Simulate ICRNL mode
- */
- if ((ch == '\r') && SP->_nl)
- ch = '\n';
-
- /* Strip 8th-bit if so desired. We do this only for characters that
- * are in the range 128-255, to provide compatibility with terminals
- * that display only 7-bit characters. Note that 'ch' may be a
- * function key at this point, so we mustn't strip _those_.
- */
- if ((ch < KEY_MIN) && (ch & 0x80))
- if (!SP->_use_meta)
- ch &= 0x7f;
-
- if (SP->_echo && ch < KEY_MIN && !(win->_flags & _ISPAD))
- wechochar(win, (chtype)ch);
-
- T(("wgetch returning : %#x = %s", ch, _trace_key(ch)));
-
- returnCode(ch);
+#endif
+ T(("wgetch returning ERR"));
+ returnCode(ERR);
+ }
+
+ /*
+ * If echo() is in effect, display the printable version of the
+ * key on the screen. Carriage return and backspace are treated
+ * specially by Solaris curses:
+ *
+ * If carriage return is defined as a function key in the
+ * terminfo, e.g., kent, then Solaris may return either ^J (or ^M
+ * if nonl() is set) or KEY_ENTER depending on the echo() mode.
+ * We echo before translating carriage return based on nonl(),
+ * since the visual result simply moves the cursor to column 0.
+ *
+ * Backspace is a different matter. Solaris curses does not
+ * translate it to KEY_BACKSPACE if kbs=^H. This does not depend
+ * on the stty modes, but appears to be a hardcoded special case.
+ * This is a difference from ncurses, which uses the terminfo entry.
+ * However, we provide the same visual result as Solaris, moving the
+ * cursor to the left.
+ */
+ if (SP->_echo && !(win->_flags & _ISPAD)) {
+ chtype backup = (ch == KEY_BACKSPACE) ? '\b' : ch;
+ if (backup < KEY_MIN)
+ wechochar(win, backup);
+ }
+
+ /*
+ * Simulate ICRNL mode
+ */
+ if ((ch == '\r') && SP->_nl)
+ ch = '\n';
+
+ /* Strip 8th-bit if so desired. We do this only for characters that
+ * are in the range 128-255, to provide compatibility with terminals
+ * that display only 7-bit characters. Note that 'ch' may be a
+ * function key at this point, so we mustn't strip _those_.
+ */
+ if ((ch < KEY_MIN) && (ch & 0x80))
+ if (!SP->_use_meta)
+ ch &= 0x7f;
+
+ T(("wgetch returning : %#x = %s", ch, _trace_key(ch)));
+
+ returnCode(ch);
}
-
/*
** int
** kgetch()
static int
kgetch(WINDOW *win GCC_UNUSED)
{
-struct tries *ptr;
-int ch = 0;
-int timeleft = ESCDELAY;
-
- TR(TRACE_IEVENT, ("kgetch(%p) called", win));
-
- ptr = SP->_keytry;
-
- for(;;)
- {
- if (!raw_key_in_fifo())
- {
- if(fifo_push() == ERR)
- {
- peek = head; /* the keys stay uninterpreted */
- return ERR;
- }
- }
- ch = fifo_peek();
- if (ch >= KEY_MIN)
- {
- peek = head;
- /* assume the key is the last in fifo */
- t_dec(); /* remove the key */
- return ch;
- }
-
- TR(TRACE_IEVENT, ("ch: %s", _trace_key((unsigned char)ch)));
- while ((ptr != NULL) && (ptr->ch != (unsigned char)ch))
- ptr = ptr->sibling;
+ struct tries *ptr;
+ int ch = 0;
+ int timeleft = ESCDELAY;
+
+ TR(TRACE_IEVENT, ("kgetch(%p) called", win));
+
+ ptr = SP->_keytry;
+
+ for (;;) {
+ if (!raw_key_in_fifo()) {
+ if (fifo_push() == ERR) {
+ peek = head; /* the keys stay uninterpreted */
+ return ERR;
+ }
+ }
+ ch = fifo_peek();
+ if (ch >= KEY_MIN) {
+ peek = head;
+ /* assume the key is the last in fifo */
+ t_dec(); /* remove the key */
+ return ch;
+ }
+
+ TR(TRACE_IEVENT, ("ch: %s", _trace_key((unsigned char) ch)));
+ while ((ptr != NULL) && (ptr->ch != (unsigned char) ch))
+ ptr = ptr->sibling;
#ifdef TRACE
- if (ptr == NULL)
- {TR(TRACE_IEVENT, ("ptr is null"));}
- else
- TR(TRACE_IEVENT, ("ptr=%p, ch=%d, value=%d",
- ptr, ptr->ch, ptr->value));
+ if (ptr == NULL) {
+ TR(TRACE_IEVENT, ("ptr is null"));
+ } else
+ TR(TRACE_IEVENT, ("ptr=%p, ch=%d, value=%d",
+ ptr, ptr->ch, ptr->value));
#endif /* TRACE */
- if (ptr == NULL)
- break;
-
- if (ptr->value != 0) { /* sequence terminated */
- 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())
- {
- TR(TRACE_IEVENT, ("waiting for rest of sequence"));
- if (!_nc_timed_wait(3, timeleft, &timeleft)) {
- TR(TRACE_IEVENT, ("ran out of time"));
- break;
- }
- }
+ if (ptr == NULL)
+ break;
+
+ if (ptr->value != 0) { /* sequence terminated */
+ TR(TRACE_IEVENT, ("end of sequence"));
+ if (peek == tail)
+ fifo_clear();
+ else
+ head = peek;
+ return (ptr->value);
}
- ch = fifo_pull();
- peek = head;
- return ch;
+
+ ptr = ptr->child;
+
+ if (!raw_key_in_fifo()) {
+ TR(TRACE_IEVENT, ("waiting for rest of sequence"));
+ if (!_nc_timed_wait(3, timeleft, &timeleft)) {
+ TR(TRACE_IEVENT, ("ran out of time"));
+ break;
+ }
+ }
+ }
+ ch = fifo_pull();
+ peek = head;
+ return ch;
}
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