1 /* $NetBSD: screen.c,v 1.13 2003/04/05 10:07:00 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 #if 0 39 static char sccsid[] = "@(#)screen.c 8.2 (blymn) 11/27/2001"; 40 #else 41 __RCSID("$NetBSD: screen.c,v 1.13 2003/04/05 10:07:00 jdc Exp $"); 42 #endif 43 #endif /* not lint */ 44 45 #include <stdlib.h> 46 47 #include "curses.h" 48 #include "curses_private.h" 49 50 /* 51 * set_term -- 52 * Change the term to the given screen. 53 * 54 */ 55 SCREEN * 56 set_term(SCREEN *new) 57 { 58 SCREEN *old_screen = _cursesi_screen; 59 60 if (_cursesi_screen != NULL) { 61 /* save changes made to the current screen... */ 62 old_screen->echoit = __echoit; 63 old_screen->pfast = __pfast; 64 old_screen->rawmode = __rawmode; 65 old_screen->noqch = __noqch; 66 old_screen->winlistp = __winlistp; 67 old_screen->COLS = COLS; 68 old_screen->LINES = LINES; 69 old_screen->COLORS = COLORS; 70 old_screen->COLOR_PAIRS = COLOR_PAIRS; 71 old_screen->GT = __GT; 72 old_screen->NONL = __NONL; 73 old_screen->UPPERCASE = __UPPERCASE; 74 } 75 76 _cursesi_screen = new; 77 78 __echoit = new->echoit; 79 __pfast = new->pfast; 80 __rawmode = new->rawmode; 81 __noqch = new->noqch; 82 COLS = new->COLS; 83 LINES = new->LINES; 84 COLORS = new->COLORS; 85 COLOR_PAIRS = new->COLOR_PAIRS; 86 __GT = new->GT; 87 __NONL = new->NONL; 88 __UPPERCASE = new->UPPERCASE; 89 90 _cursesi_resetterm(new); 91 92 __winlistp = new->winlistp; 93 94 curscr = new->curscr; 95 clearok(curscr, new->clearok); 96 stdscr = new->stdscr; 97 __virtscr = new->__virtscr; 98 99 _cursesi_reset_acs(new); 100 101 #ifdef DEBUG 102 __CTRACE("initscr: LINES = %d, COLS = %d\n", LINES, COLS); 103 #endif 104 105 return old_screen; 106 } 107 108 /* 109 * newterm -- 110 * Set up a new screen. 111 * 112 */ 113 SCREEN * 114 newterm(char *type, FILE *outfd, FILE *infd) 115 { 116 SCREEN *new_screen; 117 char *sp; 118 119 sp = type; 120 if ((type == NULL) && (sp = getenv("TERM")) == NULL) 121 return NULL; 122 123 if ((new_screen = (SCREEN *) malloc(sizeof(SCREEN))) == NULL) 124 return NULL; 125 126 new_screen->infd = infd; 127 new_screen->outfd = outfd; 128 new_screen->echoit = new_screen->nl = 1; 129 new_screen->pfast = new_screen->rawmode = new_screen->noqch = 0; 130 new_screen->nca = A_NORMAL; 131 new_screen->color_type = COLOR_NONE; 132 new_screen->COLOR_PAIRS = 0; 133 new_screen->old_mode = 2; 134 new_screen->stdbuf = NULL; 135 new_screen->stdscr = NULL; 136 new_screen->curscr = NULL; 137 new_screen->__virtscr = NULL; 138 new_screen->curwin = 0; 139 new_screen->notty = FALSE; 140 new_screen->half_delay = FALSE; 141 142 if (_cursesi_gettmode(new_screen) == ERR) 143 goto error_exit; 144 145 if (_cursesi_setterm((char *)sp, new_screen) == ERR) 146 goto error_exit; 147 148 /* Need either homing or cursor motion for refreshes */ 149 if (!new_screen->tc_ho && !new_screen->tc_cm) 150 goto error_exit; 151 152 new_screen->winlistp = NULL; 153 154 if ((new_screen->curscr = __newwin(new_screen, 0, 155 0, 0, 0, FALSE)) == ERR) 156 goto error_exit; 157 158 if ((new_screen->stdscr = __newwin(new_screen, 0, 159 0, 0, 0, FALSE)) == ERR) { 160 delwin(new_screen->curscr); 161 goto error_exit; 162 } 163 164 clearok(new_screen->stdscr, 1); 165 166 if ((new_screen->__virtscr = __newwin(new_screen, 0, 167 0, 0, 0, FALSE)) == ERR) { 168 delwin(new_screen->curscr); 169 delwin(new_screen->stdscr); 170 goto error_exit; 171 } 172 173 __init_getch(new_screen); 174 175 __init_acs(new_screen); 176 177 __set_stophandler(); 178 179 /* 180 * bleh - it seems that apps expect the first newterm to set 181 * up the curses screen.... emulate this. 182 */ 183 if (_cursesi_screen == NULL || _cursesi_screen->endwin) { 184 set_term(new_screen); 185 } 186 187 #ifdef DEBUG 188 __CTRACE("newterm: LINES = %d, COLS = %d\n", LINES, COLS); 189 #endif 190 __startwin(new_screen); 191 192 return new_screen; 193 194 error_exit: 195 free(new_screen); 196 return NULL; 197 } 198 199 /* 200 * delscreen -- 201 * Free resources used by the given screen and destroy it. 202 * 203 */ 204 void 205 delscreen(SCREEN *screen) 206 { 207 struct __winlist *list, *np; 208 209 /* free up the termcap entry stuff */ 210 t_freent(screen->cursesi_genbuf); 211 212 /* walk the window list and kill all the parent windows */ 213 for (list = screen->winlistp; list != NULL; list = list->nextp) { 214 if (list->winp->orig == NULL) 215 delwin(list->winp); 216 } 217 218 /* free the windows list structures */ 219 for (list = screen->winlistp; list;) { 220 np = list->nextp; 221 free(list); 222 list = np; 223 } 224 225 /* free the storage of the keymaps */ 226 _cursesi_free_keymap(screen->base_keymap); 227 228 free(screen->stdbuf); 229 free(screen); 230 } 231