1 /* $NetBSD: screen.c,v 1.20 2007/05/28 15:01:57 blymn 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 1.20 2007/05/28 15:01:57 blymn 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 #ifdef HAVE_WCHAR 94 _cursesi_reset_wacs(new); 95 #endif /* HAVE_WCHAR */ 96 97 #ifdef DEBUG 98 __CTRACE(__CTRACE_SCREEN, "set_term: LINES = %d, COLS = %d\n", 99 LINES, COLS); 100 #endif 101 102 return old_screen; 103 } 104 105 /* 106 * newterm -- 107 * Set up a new screen. 108 * 109 */ 110 SCREEN * 111 newterm(char *type, FILE *outfd, FILE *infd) 112 { 113 SCREEN *new_screen; 114 char *sp; 115 116 sp = type; 117 if ((type == NULL) && (sp = getenv("TERM")) == NULL) 118 return NULL; 119 120 if ((new_screen = (SCREEN *) malloc(sizeof(SCREEN))) == NULL) 121 return NULL; 122 123 #ifdef DEBUG 124 __CTRACE(__CTRACE_INIT, "newterm\n"); 125 #endif 126 127 new_screen->infd = infd; 128 new_screen->outfd = outfd; 129 new_screen->echoit = new_screen->nl = 1; 130 new_screen->pfast = new_screen->rawmode = new_screen->noqch = 0; 131 new_screen->nca = A_NORMAL; 132 new_screen->color_type = COLOR_NONE; 133 new_screen->COLOR_PAIRS = 0; 134 new_screen->old_mode = 2; 135 new_screen->stdbuf = NULL; 136 new_screen->stdscr = NULL; 137 new_screen->curscr = NULL; 138 new_screen->__virtscr = NULL; 139 new_screen->curwin = 0; 140 new_screen->notty = FALSE; 141 new_screen->half_delay = FALSE; 142 new_screen->resized = 0; 143 144 if (_cursesi_gettmode(new_screen) == ERR) 145 goto error_exit; 146 147 if (_cursesi_setterm((char *)sp, new_screen) == ERR) 148 goto error_exit; 149 150 /* Need either homing or cursor motion for refreshes */ 151 if (!new_screen->tc_ho && !new_screen->tc_cm) 152 goto error_exit; 153 154 new_screen->winlistp = NULL; 155 156 if ((new_screen->curscr = __newwin(new_screen, 0, 157 0, 0, 0, FALSE)) == NULL) 158 goto error_exit; 159 160 if ((new_screen->stdscr = __newwin(new_screen, 0, 161 0, 0, 0, FALSE)) == NULL) { 162 delwin(new_screen->curscr); 163 goto error_exit; 164 } 165 166 clearok(new_screen->stdscr, 1); 167 168 if ((new_screen->__virtscr = __newwin(new_screen, 0, 169 0, 0, 0, FALSE)) == NULL) { 170 delwin(new_screen->curscr); 171 delwin(new_screen->stdscr); 172 goto error_exit; 173 } 174 175 __init_getch(new_screen); 176 __init_acs(new_screen); 177 #ifdef HAVE_WCHAR 178 __init_get_wch( new_screen ); 179 __init_wacs(new_screen); 180 #endif /* HAVE_WCHAR */ 181 182 __set_stophandler(); 183 __set_winchhandler(); 184 185 /* 186 * bleh - it seems that apps expect the first newterm to set 187 * up the curses screen.... emulate this. 188 */ 189 if (_cursesi_screen == NULL || _cursesi_screen->endwin) { 190 set_term(new_screen); 191 } 192 193 #ifdef DEBUG 194 __CTRACE(__CTRACE_SCREEN, "newterm: LINES = %d, COLS = %d\n", 195 LINES, COLS); 196 #endif 197 __startwin(new_screen); 198 199 return new_screen; 200 201 error_exit: 202 free(new_screen); 203 return NULL; 204 } 205 206 /* 207 * delscreen -- 208 * Free resources used by the given screen and destroy it. 209 * 210 */ 211 void 212 delscreen(SCREEN *screen) 213 { 214 struct __winlist *list; 215 216 #ifdef DEBUG 217 __CTRACE(__CTRACE_SCREEN, "delscreen(%p)\n", screen); 218 #endif 219 /* free up the termcap entry stuff */ 220 t_freent(screen->cursesi_genbuf); 221 222 /* walk the window list and kill all the parent windows */ 223 while ((list = screen->winlistp) != NULL) { 224 delwin(list->winp); 225 if (list == screen->winlistp) 226 /* sanity - abort if window didn't remove itself */ 227 break; 228 } 229 230 /* free the storage of the keymaps */ 231 _cursesi_free_keymap(screen->base_keymap); 232 233 free(screen->stdbuf); 234 screen->stdbuf = NULL; 235 if (_cursesi_screen == screen) 236 _cursesi_screen = NULL; 237 free(screen); 238 } 239