1 /* $NetBSD: screen.c,v 1.17 2004/03/23 21:17:20 jdc Exp $ */ 2 3 /* 4 * Copyright (c) 1981, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 #if 0 35 static char sccsid[] = "@(#)screen.c 8.2 (blymn) 11/27/2001"; 36 #else 37 __RCSID("$NetBSD: screen.c,v 1.17 2004/03/23 21:17:20 jdc Exp $"); 38 #endif 39 #endif /* not lint */ 40 41 #include <stdlib.h> 42 43 #include "curses.h" 44 #include "curses_private.h" 45 46 /* 47 * set_term -- 48 * Change the term to the given screen. 49 * 50 */ 51 SCREEN * 52 set_term(SCREEN *new) 53 { 54 SCREEN *old_screen = _cursesi_screen; 55 56 if (_cursesi_screen != NULL) { 57 /* save changes made to the current screen... */ 58 old_screen->echoit = __echoit; 59 old_screen->pfast = __pfast; 60 old_screen->rawmode = __rawmode; 61 old_screen->noqch = __noqch; 62 old_screen->COLS = COLS; 63 old_screen->LINES = LINES; 64 old_screen->COLORS = COLORS; 65 old_screen->COLOR_PAIRS = COLOR_PAIRS; 66 old_screen->GT = __GT; 67 old_screen->NONL = __NONL; 68 old_screen->UPPERCASE = __UPPERCASE; 69 } 70 71 _cursesi_screen = new; 72 73 __echoit = new->echoit; 74 __pfast = new->pfast; 75 __rawmode = new->rawmode; 76 __noqch = new->noqch; 77 COLS = new->COLS; 78 LINES = new->LINES; 79 COLORS = new->COLORS; 80 COLOR_PAIRS = new->COLOR_PAIRS; 81 __GT = new->GT; 82 __NONL = new->NONL; 83 __UPPERCASE = new->UPPERCASE; 84 85 _cursesi_resetterm(new); 86 87 curscr = new->curscr; 88 clearok(curscr, new->clearok); 89 stdscr = new->stdscr; 90 __virtscr = new->__virtscr; 91 92 _cursesi_reset_acs(new); 93 94 #ifdef DEBUG 95 __CTRACE("initscr: LINES = %d, COLS = %d\n", LINES, COLS); 96 #endif 97 98 return old_screen; 99 } 100 101 /* 102 * newterm -- 103 * Set up a new screen. 104 * 105 */ 106 SCREEN * 107 newterm(char *type, FILE *outfd, FILE *infd) 108 { 109 SCREEN *new_screen; 110 char *sp; 111 112 sp = type; 113 if ((type == NULL) && (sp = getenv("TERM")) == NULL) 114 return NULL; 115 116 if ((new_screen = (SCREEN *) malloc(sizeof(SCREEN))) == NULL) 117 return NULL; 118 119 new_screen->infd = infd; 120 new_screen->outfd = outfd; 121 new_screen->echoit = new_screen->nl = 1; 122 new_screen->pfast = new_screen->rawmode = new_screen->noqch = 0; 123 new_screen->nca = A_NORMAL; 124 new_screen->color_type = COLOR_NONE; 125 new_screen->COLOR_PAIRS = 0; 126 new_screen->old_mode = 2; 127 new_screen->stdbuf = NULL; 128 new_screen->stdscr = NULL; 129 new_screen->curscr = NULL; 130 new_screen->__virtscr = NULL; 131 new_screen->curwin = 0; 132 new_screen->notty = FALSE; 133 new_screen->half_delay = FALSE; 134 new_screen->resized = 0; 135 136 if (_cursesi_gettmode(new_screen) == ERR) 137 goto error_exit; 138 139 if (_cursesi_setterm((char *)sp, new_screen) == ERR) 140 goto error_exit; 141 142 /* Need either homing or cursor motion for refreshes */ 143 if (!new_screen->tc_ho && !new_screen->tc_cm) 144 goto error_exit; 145 146 new_screen->winlistp = NULL; 147 148 if ((new_screen->curscr = __newwin(new_screen, 0, 149 0, 0, 0, FALSE)) == NULL) 150 goto error_exit; 151 152 if ((new_screen->stdscr = __newwin(new_screen, 0, 153 0, 0, 0, FALSE)) == NULL) { 154 delwin(new_screen->curscr); 155 goto error_exit; 156 } 157 158 clearok(new_screen->stdscr, 1); 159 160 if ((new_screen->__virtscr = __newwin(new_screen, 0, 161 0, 0, 0, FALSE)) == NULL) { 162 delwin(new_screen->curscr); 163 delwin(new_screen->stdscr); 164 goto error_exit; 165 } 166 167 __init_getch(new_screen); 168 169 __init_acs(new_screen); 170 171 __set_stophandler(); 172 __set_winchhandler(); 173 174 /* 175 * bleh - it seems that apps expect the first newterm to set 176 * up the curses screen.... emulate this. 177 */ 178 if (_cursesi_screen == NULL || _cursesi_screen->endwin) { 179 set_term(new_screen); 180 } 181 182 #ifdef DEBUG 183 __CTRACE("newterm: LINES = %d, COLS = %d\n", LINES, COLS); 184 #endif 185 __startwin(new_screen); 186 187 return new_screen; 188 189 error_exit: 190 free(new_screen); 191 return NULL; 192 } 193 194 /* 195 * delscreen -- 196 * Free resources used by the given screen and destroy it. 197 * 198 */ 199 void 200 delscreen(SCREEN *screen) 201 { 202 struct __winlist *list; 203 204 /* free up the termcap entry stuff */ 205 t_freent(screen->cursesi_genbuf); 206 207 /* walk the window list and kill all the parent windows */ 208 while ((list = screen->winlistp) != NULL) { 209 delwin(list->winp); 210 if (list == screen->winlistp) 211 /* sanity - abort if window didn't remove itself */ 212 break; 213 } 214 215 /* free the storage of the keymaps */ 216 _cursesi_free_keymap(screen->base_keymap); 217 218 free(screen->stdbuf); 219 free(screen); 220 } 221