NetBSD/usr.bin/vi/sex/sex_screen.c

216 lines
5.3 KiB
C

/*-
* Copyright (c) 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
/* from: static char sccsid[] = "@(#)sex_screen.c 8.30 (Berkeley) 12/23/93"; */
static char *rcsid = "$Id: sex_screen.c,v 1.2 1994/01/24 06:41:04 cgd Exp $";
#endif /* not lint */
#include <sys/types.h>
#include <stdlib.h>
#include <unistd.h>
#include "vi.h"
#include "excmd.h"
#include "sex_screen.h"
#include "../svi/svi_screen.h"
static void sex_abort __P((void));
static int sex_noop __P((void));
static int sex_nope __P((SCR *));
/*
* sex_screen_init --
* Initialize the ex screen.
*/
int
sex_screen_init(sp)
SCR *sp;
{
/* Initialize support routines. */
sp->s_bell = sex_bell;
sp->s_bg = (int (*)())sex_nope;
sp->s_busy = (int (*)())sex_busy;
sp->s_change = (int (*)())sex_noop;
sp->s_chposition = (size_t (*)())sex_abort;
sp->s_clear = (int (*)())sex_noop;
sp->s_column = (int (*)())sex_abort;
sp->s_confirm = sex_confirm;
sp->s_down = (int (*)())sex_abort;
sp->s_edit = sex_screen_edit;
sp->s_end = (int (*)())sex_noop;
sp->s_ex_cmd = (int (*)())sex_abort;
sp->s_ex_run = (int (*)())sex_abort;
sp->s_ex_write = (int (*)())sex_abort;
sp->s_fg = (int (*)())sex_nope;
sp->s_fill = (int (*)())sex_abort;
sp->s_get = F_ISSET(sp->gp,
G_ISFROMTTY) ? sex_get : sex_get_notty;
sp->s_key_read = sex_key_read;
sp->s_optchange = (int (*)())sex_noop;
sp->s_position = (int (*)())sex_abort;
sp->s_rabs = (int (*)())sex_nope;
sp->s_refresh = sex_refresh;
sp->s_relative = (size_t (*)())sex_abort;
sp->s_rrel = (int (*)())sex_nope;
sp->s_split = (int (*)())sex_nope;
sp->s_suspend = sex_suspend;
sp->s_up = (int (*)())sex_abort;
return (0);
}
/*
* sex_screen_copy --
* Copy to a new screen.
*/
int
sex_screen_copy(orig, sp)
SCR *orig, *sp;
{
return (0);
}
/*
* sex_screen_end --
* End a screen.
*/
int
sex_screen_end(sp)
SCR *sp;
{
return (0);
}
/*
* sex_screen_edit --
* Main ex screen loop. The ex screen is relatively uncomplicated.
* As long as it has a stdio FILE pointer for output, it's happy.
*/
int
sex_screen_edit(sp, ep)
SCR *sp;
EXF *ep;
{
struct termios rawt, t;
GS *saved_gp;
int force, rval;
/* Initialize the terminal state. */
if (F_ISSET(sp->gp, G_ISFROMTTY))
SEX_RAW(t, rawt);
/* Write to the terminal. */
sp->stdfp = stdout;
for (;;) {
sp->rows = O_VAL(sp, O_LINES);
sp->cols = O_VAL(sp, O_COLUMNS);
/*
* Run ex. If ex fails, sex data structures
* may be corrupted, be careful what you do.
*/
if (rval = ex(sp, sp->ep)) {
if (F_ISSET(ep, F_RCV_ON)) {
F_SET(ep, F_RCV_NORM);
(void)rcv_sync(sp, sp->ep);
}
(void)file_end(sp, sp->ep, 1);
(void)screen_end(sp); /* General SCR info. */
break;
}
saved_gp = sp->gp;
force = 0;
switch (F_ISSET(sp, S_MAJOR_CHANGE)) {
case S_EXIT_FORCE:
force = 1;
/* FALLTHROUGH */
case S_EXIT:
F_CLR(sp, S_EXIT_FORCE | S_EXIT);
if (file_end(sp, sp->ep, force))
break;
(void)screen_end(sp); /* General SCR info. */
goto ret;
case 0: /* Changing from ex mode. */
goto ret;
case S_FSWITCH:
F_CLR(sp, S_FSWITCH);
break;
case S_SSWITCH:
default:
abort();
}
}
/* Reset the terminal state. */
ret: if (F_ISSET(sp->gp, G_ISFROMTTY) && SEX_NORAW(t))
rval = 1;
return (rval);
}
/*
* sex_abort --
* Fake function. Die.
*/
static void
sex_abort()
{
abort();
}
/*
* sex_noop --
* Fake function. Do nothing.
*/
static int
sex_noop()
{
return (0);
}
/*
* sex_nope --
* Fake function. Not in ex, you don't.
*/
static int
sex_nope(sp)
SCR *sp;
{
msgq(sp, M_ERR, "Command not applicable to ex mode.");
return (1);
}