screen.c revision 1.7
1 /* $NetBSD: screen.c,v 1.7 2002/08/04 16:43:08 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 1.7 2002/08/04 16:43:08 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->nca = __nca; 67 old_screen->winlistp = __winlistp; 68 old_screen->COLS = COLS; 69 old_screen->LINES = LINES; 70 old_screen->COLORS = COLORS; 71 old_screen->COLOR_PAIRS = COLOR_PAIRS; 72 old_screen->GT = __GT; 73 old_screen->NONL = __NONL; 74 old_screen->UPPERCASE = __UPPERCASE; 75 } 76 77 _cursesi_screen = new; 78 79 __echoit = new->echoit; 80 __pfast = new->pfast; 81 __rawmode = new->rawmode; 82 __noqch = new->noqch; 83 __nca = new->nca; 84 COLS = new->COLS; 85 LINES = new->LINES; 86 COLORS = new->COLORS; 87 COLOR_PAIRS = new->COLOR_PAIRS; 88 __GT = new->GT; 89 __NONL = new->NONL; 90 __UPPERCASE = new->UPPERCASE; 91 92 _cursesi_resetterm(new); 93 94 __winlistp = new->winlistp; 95 96 curscr = new->curscr; 97 clearok(curscr, new->clearok); 98 stdscr = new->stdscr; 99 __virtscr = new->__virtscr; 100 101 _cursesi_reset_acs(new); 102 103 #ifdef DEBUG 104 __CTRACE("initscr: LINES = %d, COLS = %d\n", LINES, COLS); 105 #endif 106 107 return old_screen; 108 } 109 110 /* 111 * newterm -- 112 * Set up a new screen. 113 * 114 */ 115 SCREEN * 116 newterm(char *type, FILE *outfd, FILE *infd) 117 { 118 SCREEN *new_screen; 119 char *sp; 120 121 sp = type; 122 if ((type == NULL) && (sp = getenv("TERM")) == NULL) 123 return NULL; 124 125 if ((new_screen = (SCREEN *) malloc(sizeof(SCREEN))) == NULL) 126 return NULL; 127 128 new_screen->infd = infd; 129 new_screen->outfd = outfd; 130 new_screen->echoit = 1; 131 new_screen->pfast = new_screen->rawmode = new_screen->noqch = 0; 132 new_screen->nca = A_NORMAL; 133 new_screen->color_type = COLOR_NONE; 134 new_screen->COLOR_PAIRS = 0; 135 new_screen->old_mode = 2; 136 new_screen->stdbuf = NULL; 137 new_screen->stdscr = NULL; 138 new_screen->curscr = NULL; 139 new_screen->__virtscr = NULL; 140 new_screen->curwin = 0; 141 new_screen->notty = FALSE; 142 143 if (_cursesi_gettmode(new_screen) == ERR) 144 goto error_exit; 145 146 if (_cursesi_setterm((char *)sp, new_screen) == ERR) 147 goto error_exit; 148 149 /* Need either homing or cursor motion for refreshes */ 150 if (!new_screen->tc_ho && !new_screen->tc_cm) 151 goto error_exit; 152 153 new_screen->winlistp = NULL; 154 155 if ((new_screen->curscr = __newwin(new_screen, new_screen->LINES, 156 new_screen->COLS, 0, 0)) == ERR) 157 goto error_exit; 158 159 clearok(new_screen->curscr, 1); 160 161 if ((new_screen->stdscr = __newwin(new_screen, new_screen->LINES, 162 new_screen->COLS, 0, 0)) == ERR) { 163 delwin(new_screen->curscr); 164 goto error_exit; 165 } 166 167 clearok(new_screen->stdscr, 1); 168 169 if ((new_screen->__virtscr = __newwin(new_screen, new_screen->LINES, 170 new_screen->COLS, 0, 0)) == ERR) { 171 delwin(new_screen->curscr); 172 delwin(new_screen->stdscr); 173 goto error_exit; 174 } 175 176 __init_getch(new_screen); 177 178 __init_acs(new_screen); 179 180 __set_stophandler(); 181 182 /* 183 * bleh - it seems that apps expect the first newterm to set 184 * up the curses screen.... emulate this. 185 */ 186 if (_cursesi_screen == NULL || _cursesi_screen->endwin) { 187 set_term(new_screen); 188 } 189 190 #ifdef DEBUG 191 __CTRACE("newterm: LINES = %d, COLS = %d\n", LINES, COLS); 192 #endif 193 __startwin(new_screen); 194 195 clearok(new_screen->curscr, TRUE); 196 return new_screen; 197 198 error_exit: 199 free(new_screen); 200 return NULL; 201 } 202 203 /* 204 * delscreen -- 205 * Free resources used by the given screen and destroy it. 206 * 207 */ 208 void 209 delscreen(SCREEN *screen) 210 { 211 struct __winlist *list, *np; 212 213 /* free up the termcap entry stuff */ 214 t_freent(screen->cursesi_genbuf); 215 216 /* walk the window list and kill all the parent windows */ 217 for (list = screen->winlistp; list != NULL; list = list->nextp) { 218 if (list->winp->orig == NULL) 219 delwin(list->winp); 220 } 221 222 /* free the windows list structures */ 223 for (list = screen->winlistp; list;) { 224 np = list->nextp; 225 free(list); 226 list = np; 227 } 228 229 /* free the storage of the keymaps */ 230 _cursesi_free_keymap(screen->base_keymap); 231 232 free(screen->stdbuf); 233 free(screen); 234 } 235
Indexes created Mon Sep 22 13:09:51 GMT 2025