285 lines
7.2 KiB
C
285 lines
7.2 KiB
C
/* $NetBSD: screen.c,v 1.39 2024/05/27 14:30:43 uwe Exp $ */
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/*
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* Copyright (c) 1981, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)screen.c 8.2 (blymn) 11/27/2001";
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#else
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__RCSID("$NetBSD: screen.c,v 1.39 2024/05/27 14:30:43 uwe Exp $");
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#endif
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#endif /* not lint */
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#include <stdlib.h>
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#include "curses.h"
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#include "curses_private.h"
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static int filtered;
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static void __delscreen(SCREEN *);
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/*
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* filter has to be called before either initscr or newterm.
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*/
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void
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filter(void)
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{
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filtered = TRUE;
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}
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/*
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* set_term --
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* Change the term to the given screen.
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*
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*/
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SCREEN *
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set_term(SCREEN *new)
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{
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SCREEN *old_screen = _cursesi_screen;
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if (_cursesi_screen != NULL) {
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/* save changes made to the current screen... */
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old_screen->echoit = __echoit;
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old_screen->pfast = __pfast;
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old_screen->rawmode = __rawmode;
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old_screen->noqch = __noqch;
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old_screen->COLS = COLS;
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old_screen->LINES = LINES;
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old_screen->ESCDELAY = ESCDELAY;
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old_screen->TABSIZE = TABSIZE;
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old_screen->COLORS = COLORS;
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old_screen->COLOR_PAIRS = COLOR_PAIRS;
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old_screen->GT = __GT;
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old_screen->NONL = __NONL;
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old_screen->UPPERCASE = __UPPERCASE;
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}
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_cursesi_screen = new;
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__echoit = new->echoit;
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__pfast = new->pfast;
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__rawmode = new->rawmode;
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__noqch = new->noqch;
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COLS = new->COLS;
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LINES = new->LINES;
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ESCDELAY = new->ESCDELAY;
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TABSIZE = new->TABSIZE;
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COLORS = new->COLORS;
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COLOR_PAIRS = new->COLOR_PAIRS;
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__GT = new->GT;
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__NONL = new->NONL;
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__UPPERCASE = new->UPPERCASE;
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_cursesi_resetterm(new);
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curscr = new->curscr;
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clearok(curscr, new->clearok);
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stdscr = new->stdscr;
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__virtscr = new->__virtscr;
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_cursesi_reset_acs(new);
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#ifdef HAVE_WCHAR
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_cursesi_reset_wacs(new);
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#endif /* HAVE_WCHAR */
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__CTRACE(__CTRACE_SCREEN, "set_term: LINES = %d, COLS = %d\n",
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LINES, COLS);
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return old_screen;
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}
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/*
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* newterm --
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* Set up a new screen.
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*
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*/
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SCREEN *
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newterm(const char *type, FILE *outfd, FILE *infd)
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{
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SCREEN *new_screen;
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const char *sp;
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sp = type;
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if (type == NULL && (sp = getenv("TERM")) == NULL)
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return NULL;
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if ((new_screen = calloc(1, sizeof(SCREEN))) == NULL)
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return NULL;
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__CTRACE(__CTRACE_INIT, "newterm\n");
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new_screen->infd = infd;
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/*
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* POSIX standard says this should be set to infd by default,
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* but this seems to break nvi by leaving an unrefreshed screen.
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* Also, the line breakout optimisation advertised in ncurses
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* doesn't actually do anything, so explicitly disabling it here makes
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* sense for the time being.
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* A caller can always enable it by calling typeahead(3) anyway.
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*/
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new_screen->checkfd = -1; // fileno(infd);
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new_screen->outfd = outfd;
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new_screen->echoit = new_screen->nl = 1;
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new_screen->pfast = new_screen->rawmode = new_screen->noqch = 0;
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new_screen->filtered = filtered;
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filtered = FALSE; /* filter() must precede each newterm() */
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new_screen->nca = A_NORMAL;
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new_screen->color_type = COLOR_NONE;
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new_screen->COLOR_PAIRS = 0;
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new_screen->old_mode = 1;
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new_screen->stdbuf = NULL;
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new_screen->stdscr = NULL;
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new_screen->curscr = NULL;
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new_screen->__virtscr = NULL;
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new_screen->curwin = 0;
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new_screen->notty = FALSE;
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new_screen->resized = 0;
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new_screen->unget_len = 32;
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if ((new_screen->unget_list =
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malloc(sizeof(wchar_t) * new_screen->unget_len)) == NULL)
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{
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goto error_exit;
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}
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new_screen->unget_pos = 0;
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if (_cursesi_gettmode(new_screen) == ERR)
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goto error_exit;
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if (_cursesi_setterm(sp, new_screen) == ERR)
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goto error_exit;
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/* Need either homing or cursor motion for refreshes */
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if (!t_cursor_home(new_screen->term) &&
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!t_cursor_address(new_screen->term))
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goto error_exit;
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new_screen->winlistp = NULL;
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if ((new_screen->curscr = __newwin(new_screen, 0,
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0, 0, 0, FALSE, FALSE)) == NULL)
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goto error_exit;
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if ((new_screen->__virtscr = __newwin(new_screen, 0,
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0, 0, 0, FALSE, FALSE)) == NULL)
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goto error_exit;
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/* If Soft Label Keys are setup, they will ripoffline. */
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if (__slk_init(new_screen) == ERR)
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goto error_exit;
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if (__ripoffscreen(new_screen) == ERR)
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goto error_exit;
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new_screen->stdscr = __newwin(new_screen, 0, 0, 0, 0, FALSE, TRUE);
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if (new_screen->stdscr == NULL)
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goto error_exit;
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clearok(new_screen->stdscr, 1);
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__init_getch(new_screen);
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__init_acs(new_screen);
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#ifdef HAVE_WCHAR
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__init_get_wch(new_screen);
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__init_wacs(new_screen);
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#endif /* HAVE_WCHAR */
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__set_stophandler();
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__set_winchhandler();
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/*
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* bleh - it seems that apps expect the first newterm to set
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* up the curses screen.... emulate this.
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*/
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if (_cursesi_screen == NULL || _cursesi_screen->endwin) {
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set_term(new_screen);
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}
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__CTRACE(__CTRACE_SCREEN, "newterm: LINES = %d, COLS = %d\n",
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LINES, COLS);
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__startwin(new_screen);
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return new_screen;
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error_exit:
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__delscreen(new_screen);
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free(new_screen->unget_list);
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free(new_screen);
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return NULL;
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}
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/*
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* delscreen --
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* Free resources used by the given screen and destroy it.
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*
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*/
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void
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delscreen(SCREEN *screen)
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{
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__CTRACE(__CTRACE_SCREEN, "delscreen(%p)\n", screen);
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__delscreen(screen);
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/* free the storage of the keymaps */
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_cursesi_free_keymap(screen->base_keymap);
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/* free the Soft Label Keys */
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__slk_free(screen);
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free(screen->stdbuf);
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free(screen->unget_list);
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if (_cursesi_screen == screen)
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_cursesi_screen = NULL;
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free(screen);
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}
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static void
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__delscreen(SCREEN *screen)
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{
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struct __winlist *list;
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/* free up the terminfo stuff */
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if (screen->term != NULL)
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del_curterm(screen->term);
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/* walk the window list and kill all the parent windows */
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while ((list = screen->winlistp) != NULL) {
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delwin(list->winp);
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if (list == screen->winlistp)
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/* sanity - abort if window didn't remove itself */
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break;
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}
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}
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