screen.c revision 1.21
1 /* $NetBSD: screen.c,v 1.21 2007/12/08 18:38:11 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 1.21 2007/12/08 18:38:11 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 #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 new_screen->unget_len = 32; 144 145 if ((new_screen->unget_list = 146 malloc(sizeof(wchar_t) * new_screen->unget_len)) == NULL) { 147 goto error_exit; 148 } 149 new_screen->unget_pos = 0; 150 151 if (_cursesi_gettmode(new_screen) == ERR) 152 goto error_exit; 153 154 if (_cursesi_setterm((char *)sp, new_screen) == ERR) 155 goto error_exit; 156 157 /* Need either homing or cursor motion for refreshes */ 158 if (!new_screen->tc_ho && !new_screen->tc_cm) 159 goto error_exit; 160 161 new_screen->winlistp = NULL; 162 163 if ((new_screen->curscr = __newwin(new_screen, 0, 164 0, 0, 0, FALSE)) == NULL) 165 goto error_exit; 166 167 if ((new_screen->stdscr = __newwin(new_screen, 0, 168 0, 0, 0, FALSE)) == NULL) { 169 delwin(new_screen->curscr); 170 goto error_exit; 171 } 172 173 clearok(new_screen->stdscr, 1); 174 175 if ((new_screen->__virtscr = __newwin(new_screen, 0, 176 0, 0, 0, FALSE)) == NULL) { 177 delwin(new_screen->curscr); 178 delwin(new_screen->stdscr); 179 goto error_exit; 180 } 181 182 __init_getch(new_screen); 183 __init_acs(new_screen); 184 #ifdef HAVE_WCHAR 185 __init_get_wch( new_screen ); 186 __init_wacs(new_screen); 187 #endif /* HAVE_WCHAR */ 188 189 __set_stophandler(); 190 __set_winchhandler(); 191 192 /* 193 * bleh - it seems that apps expect the first newterm to set 194 * up the curses screen.... emulate this. 195 */ 196 if (_cursesi_screen == NULL || _cursesi_screen->endwin) { 197 set_term(new_screen); 198 } 199 200 #ifdef DEBUG 201 __CTRACE(__CTRACE_SCREEN, "newterm: LINES = %d, COLS = %d\n", 202 LINES, COLS); 203 #endif 204 __startwin(new_screen); 205 206 return new_screen; 207 208 error_exit: 209 free(new_screen); 210 return NULL; 211 } 212 213 /* 214 * delscreen -- 215 * Free resources used by the given screen and destroy it. 216 * 217 */ 218 void 219 delscreen(SCREEN *screen) 220 { 221 struct __winlist *list; 222 223 #ifdef DEBUG 224 __CTRACE(__CTRACE_SCREEN, "delscreen(%p)\n", screen); 225 #endif 226 /* free up the termcap entry stuff */ 227 t_freent(screen->cursesi_genbuf); 228 229 /* walk the window list and kill all the parent windows */ 230 while ((list = screen->winlistp) != NULL) { 231 delwin(list->winp); 232 if (list == screen->winlistp) 233 /* sanity - abort if window didn't remove itself */ 234 break; 235 } 236 237 /* free the storage of the keymaps */ 238 _cursesi_free_keymap(screen->base_keymap); 239 240 free(screen->stdbuf); 241 screen->stdbuf = NULL; 242 if (_cursesi_screen == screen) 243 _cursesi_screen = NULL; 244 free(screen); 245 } 246
Indexes created Tue Sep 23 07:09:52 GMT 2025