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screen.c
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screen.c
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/* $NetBSD: screen.c,v 1.17 2004/03/23 21:17:20 jdc Exp $ */
/*
* Copyright (c) 1981, 1993, 1994
* 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. 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.
*/
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)screen.c 8.2 (blymn) 11/27/2001";
#else
__RCSID("$NetBSD: screen.c,v 1.17 2004/03/23 21:17:20 jdc Exp $");
#endif
#endif /* not lint */
#include <stdlib.h>
#include "curses.h"
#include "curses_private.h"
/*
* set_term --
* Change the term to the given screen.
*
*/
SCREEN *
set_term(SCREEN *new)
{
SCREEN *old_screen = _cursesi_screen;
if (_cursesi_screen != NULL) {
/* save changes made to the current screen... */
old_screen->echoit = __echoit;
old_screen->pfast = __pfast;
old_screen->rawmode = __rawmode;
old_screen->noqch = __noqch;
old_screen->COLS = COLS;
old_screen->LINES = LINES;
old_screen->COLORS = COLORS;
old_screen->COLOR_PAIRS = COLOR_PAIRS;
old_screen->GT = __GT;
old_screen->NONL = __NONL;
old_screen->UPPERCASE = __UPPERCASE;
}
_cursesi_screen = new;
__echoit = new->echoit;
__pfast = new->pfast;
__rawmode = new->rawmode;
__noqch = new->noqch;
COLS = new->COLS;
LINES = new->LINES;
COLORS = new->COLORS;
COLOR_PAIRS = new->COLOR_PAIRS;
__GT = new->GT;
__NONL = new->NONL;
__UPPERCASE = new->UPPERCASE;
_cursesi_resetterm(new);
curscr = new->curscr;
clearok(curscr, new->clearok);
stdscr = new->stdscr;
__virtscr = new->__virtscr;
_cursesi_reset_acs(new);
#ifdef DEBUG
__CTRACE("initscr: LINES = %d, COLS = %d\n", LINES, COLS);
#endif
return old_screen;
}
/*
* newterm --
* Set up a new screen.
*
*/
SCREEN *
newterm(char *type, FILE *outfd, FILE *infd)
{
SCREEN *new_screen;
char *sp;
sp = type;
if ((type == NULL) && (sp = getenv("TERM")) == NULL)
return NULL;
if ((new_screen = (SCREEN *) malloc(sizeof(SCREEN))) == NULL)
return NULL;
new_screen->infd = infd;
new_screen->outfd = outfd;
new_screen->echoit = new_screen->nl = 1;
new_screen->pfast = new_screen->rawmode = new_screen->noqch = 0;
new_screen->nca = A_NORMAL;
new_screen->color_type = COLOR_NONE;
new_screen->COLOR_PAIRS = 0;
new_screen->old_mode = 2;
new_screen->stdbuf = NULL;
new_screen->stdscr = NULL;
new_screen->curscr = NULL;
new_screen->__virtscr = NULL;
new_screen->curwin = 0;
new_screen->notty = FALSE;
new_screen->half_delay = FALSE;
new_screen->resized = 0;
if (_cursesi_gettmode(new_screen) == ERR)
goto error_exit;
if (_cursesi_setterm((char *)sp, new_screen) == ERR)
goto error_exit;
/* Need either homing or cursor motion for refreshes */
if (!new_screen->tc_ho && !new_screen->tc_cm)
goto error_exit;
new_screen->winlistp = NULL;
if ((new_screen->curscr = __newwin(new_screen, 0,
0, 0, 0, FALSE)) == NULL)
goto error_exit;
if ((new_screen->stdscr = __newwin(new_screen, 0,
0, 0, 0, FALSE)) == NULL) {
delwin(new_screen->curscr);
goto error_exit;
}
clearok(new_screen->stdscr, 1);
if ((new_screen->__virtscr = __newwin(new_screen, 0,
0, 0, 0, FALSE)) == NULL) {
delwin(new_screen->curscr);
delwin(new_screen->stdscr);
goto error_exit;
}
__init_getch(new_screen);
__init_acs(new_screen);
__set_stophandler();
__set_winchhandler();
/*
* bleh - it seems that apps expect the first newterm to set
* up the curses screen.... emulate this.
*/
if (_cursesi_screen == NULL || _cursesi_screen->endwin) {
set_term(new_screen);
}
#ifdef DEBUG
__CTRACE("newterm: LINES = %d, COLS = %d\n", LINES, COLS);
#endif
__startwin(new_screen);
return new_screen;
error_exit:
free(new_screen);
return NULL;
}
/*
* delscreen --
* Free resources used by the given screen and destroy it.
*
*/
void
delscreen(SCREEN *screen)
{
struct __winlist *list;
/* free up the termcap entry stuff */
t_freent(screen->cursesi_genbuf);
/* walk the window list and kill all the parent windows */
while ((list = screen->winlistp) != NULL) {
delwin(list->winp);
if (list == screen->winlistp)
/* sanity - abort if window didn't remove itself */
break;
}
/* free the storage of the keymaps */
_cursesi_free_keymap(screen->base_keymap);
free(screen->stdbuf);
free(screen);
}