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/*-
* Copyright (c) 1993, 1994
* The Regents of the University of California. All rights reserved.
* Copyright (c) 1993, 1994, 1995, 1996
* Keith Bostic. All rights reserved.
*
* See the LICENSE file for redistribution information.
*/
#include "config.h"
#ifndef lint
static const char sccsid[] = "@(#)tk_read.c 8.12 (Berkeley) 9/24/96";
#endif /* not lint */
#include <sys/types.h>
#include <sys/queue.h>
#include <bitstring.h>
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>
#include "../common/common.h"
#include "../ex/script.h"
#include "tki.h"
static input_t tk_read __P((SCR *, int));
static int tk_resize __P((SCR *, size_t, size_t));
/*
* tk_event --
* Return a single event.
*
* PUBLIC: int tk_event __P((SCR *, EVENT *, u_int32_t, int));
*/
int
tk_event(sp, evp, flags, timeout)
SCR *sp;
EVENT *evp;
u_int32_t flags;
int timeout;
{
EVENT *tevp;
TK_PRIVATE *tkp;
size_t lines, columns;
int changed;
/*
* Queue signal based events. We never clear SIGHUP or SIGTERM events,
* so that we just keep returning them until the editor dies.
*/
tkp = TKP(sp);
sig: if (LF_ISSET(EC_INTERRUPT) || F_ISSET(tkp, TK_SIGINT)) {
if (F_ISSET(tkp, TK_SIGINT)) {
F_CLR(tkp, TK_SIGINT);
evp->e_event = E_INTERRUPT;
} else
evp->e_event = E_TIMEOUT;
return (0);
}
if (F_ISSET(tkp, TK_SIGHUP | TK_SIGTERM | TK_SIGWINCH)) {
if (F_ISSET(tkp, TK_SIGHUP)) {
evp->e_event = E_SIGHUP;
return (0);
}
if (F_ISSET(tkp, TK_SIGTERM)) {
evp->e_event = E_SIGTERM;
return (0);
}
if (F_ISSET(tkp, TK_SIGWINCH)) {
F_CLR(tkp, TK_SIGWINCH);
(void)tk_ssize(sp, 1, &lines, &columns, &changed);
if (changed) {
(void)tk_resize(sp, lines, columns);
evp->e_event = E_WRESIZE;
return (0);
}
/* No change, so ignore the signal. */
}
}
/* Queue special ops. */
ops: if ((tevp = tkp->evq.tqh_first) != NULL) {
*evp = *tevp;
TAILQ_REMOVE(&tkp->evq, tevp, q);
free(tevp);
return (0);
}
/* Read input characters. */
switch (tk_read(sp, timeout)) {
case INP_OK:
evp->e_csp = tkp->ibuf;
evp->e_len = tkp->ibuf_cnt;
evp->e_event = E_STRING;
tkp->ibuf_cnt = 0;
break;
case INP_EOF:
evp->e_event = E_EOF;
break;
case INP_ERR:
evp->e_event = E_ERR;
break;
case INP_INTR:
goto sig;
break;
case INP_TIMEOUT:
/* May have returned because queued a special op. */
if (tkp->evq.tqh_first != NULL)
goto ops;
/* Otherwise, we timed out. */
evp->e_event = E_TIMEOUT;
break;
default:
abort();
}
return (0);
}
/*
* tk_read --
* Read characters from the input.
*/
static input_t
tk_read(sp, timeout)
SCR *sp;
int timeout;
{
TK_PRIVATE *tkp;
char buf[20];
/*
* Check scripting window file descriptors. It's ugly that we wait
* on scripting file descriptors here, but it's the only way to keep
* from locking out scripting windows.
*/
if (F_ISSET(sp->gp, G_SCRWIN) && sscr_input(sp))
return (INP_ERR);
/* Read characters. */
tkp = TKP(sp);
(void)snprintf(buf, sizeof(buf), "%d", timeout);
(void)Tcl_VarEval(tkp->interp, "tk_key_wait ", buf, NULL);
return (tkp->ibuf_cnt == 0 ? INP_TIMEOUT : INP_OK);
}
/*
* tk_key --
* Receive an input key.
*
* PUBLIC: int tk_key __P((ClientData, Tcl_Interp *, int, char *[]));
*/
int
tk_key(clientData, interp, argc, argv)
ClientData clientData;
Tcl_Interp *interp;
int argc;
char *argv[];
{
TK_PRIVATE *tkp;
u_int8_t *p, *t;
tkp = (TK_PRIVATE *)clientData;
for (p =
tkp->ibuf + tkp->ibuf_cnt, t = argv[1]; (*p++ = *t++) != '\0';
++tkp->ibuf_cnt);
return (TCL_OK);
}
/*
* tk_resize --
* Reset the options for a resize event.
*/
static int
tk_resize(sp, lines, columns)
SCR *sp;
size_t lines, columns;
{
ARGS *argv[2], a, b;
int rval;
char b1[1024];
a.bp = b1;
b.bp = NULL;
a.len = b.len = 0;
argv[0] = &a;
argv[1] = &b;
(void)snprintf(b1, sizeof(b1), "lines=%lu", (u_long)lines);
a.len = strlen(b1);
if (opts_set(sp, argv, NULL))
return (1);
(void)snprintf(b1, sizeof(b1), "columns=%lu", (u_long)columns);
a.len = strlen(b1);
if (opts_set(sp, argv, NULL))
return (1);
return (0);
}
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