screen.c revision 1.27
1 /* $NetBSD: screen.c,v 1.27 2017/01/06 13:53:18 roy 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 1.27 2017/01/06 13:53:18 roy Exp $"); 38 #endif 39 #endif /* not lint */ 40 41 #include <stdlib.h> 42 43 #include "curses.h" 44 #include "curses_private.h" 45 46 static int filtered; 47 48 /* 49 * filter has to be called before either initscr or newterm. 50 */ 51 void 52 filter(void) 53 { 54 55 filtered = TRUE; 56 } 57 58 /* 59 * set_term -- 60 * Change the term to the given screen. 61 * 62 */ 63 SCREEN * 64 set_term(SCREEN *new) 65 { 66 SCREEN *old_screen = _cursesi_screen; 67 68 if (_cursesi_screen != NULL) { 69 /* save changes made to the current screen... */ 70 old_screen->echoit = __echoit; 71 old_screen->pfast = __pfast; 72 old_screen->rawmode = __rawmode; 73 old_screen->noqch = __noqch; 74 old_screen->COLS = COLS; 75 old_screen->LINES = LINES; 76 old_screen->COLORS = COLORS; 77 old_screen->COLOR_PAIRS = COLOR_PAIRS; 78 old_screen->GT = __GT; 79 old_screen->NONL = __NONL; 80 old_screen->UPPERCASE = __UPPERCASE; 81 } 82 83 _cursesi_screen = new; 84 85 __echoit = new->echoit; 86 __pfast = new->pfast; 87 __rawmode = new->rawmode; 88 __noqch = new->noqch; 89 COLS = new->COLS; 90 LINES = new->LINES; 91 COLORS = new->COLORS; 92 COLOR_PAIRS = new->COLOR_PAIRS; 93 __GT = new->GT; 94 __NONL = new->NONL; 95 __UPPERCASE = new->UPPERCASE; 96 97 _cursesi_resetterm(new); 98 99 curscr = new->curscr; 100 clearok(curscr, new->clearok); 101 stdscr = new->stdscr; 102 __virtscr = new->__virtscr; 103 104 _cursesi_reset_acs(new); 105 #ifdef HAVE_WCHAR 106 _cursesi_reset_wacs(new); 107 #endif /* HAVE_WCHAR */ 108 109 #ifdef DEBUG 110 __CTRACE(__CTRACE_SCREEN, "set_term: LINES = %d, COLS = %d\n", 111 LINES, COLS); 112 #endif 113 114 return old_screen; 115 } 116 117 /* 118 * newterm -- 119 * Set up a new screen. 120 * 121 */ 122 SCREEN * 123 newterm(char *type, FILE *outfd, FILE *infd) 124 { 125 SCREEN *new_screen; 126 char *sp; 127 128 sp = type; 129 if (type == NULL && (sp = getenv("TERM")) == NULL) 130 return NULL; 131 132 if ((new_screen = calloc(1, sizeof(SCREEN))) == NULL) 133 return NULL; 134 135 #ifdef DEBUG 136 __CTRACE(__CTRACE_INIT, "newterm\n"); 137 #endif 138 139 new_screen->infd = infd; 140 new_screen->checkfd = fileno(infd); 141 new_screen->outfd = outfd; 142 new_screen->echoit = new_screen->nl = 1; 143 new_screen->pfast = new_screen->rawmode = new_screen->noqch = 0; 144 new_screen->filtered = filtered; 145 filtered = FALSE; /* filter() must preceed each newterm() */ 146 new_screen->nca = A_NORMAL; 147 new_screen->color_type = COLOR_NONE; 148 new_screen->COLOR_PAIRS = 0; 149 new_screen->old_mode = 2; 150 new_screen->stdbuf = NULL; 151 new_screen->stdscr = NULL; 152 new_screen->curscr = NULL; 153 new_screen->__virtscr = NULL; 154 new_screen->curwin = 0; 155 new_screen->notty = FALSE; 156 new_screen->half_delay = FALSE; 157 new_screen->resized = 0; 158 new_screen->unget_len = 32; 159 160 if ((new_screen->unget_list = 161 malloc(sizeof(wchar_t) * new_screen->unget_len)) == NULL) { 162 goto error_exit; 163 } 164 new_screen->unget_pos = 0; 165 166 if (_cursesi_gettmode(new_screen) == ERR) 167 goto error_exit; 168 169 if (_cursesi_setterm((char *)sp, new_screen) == ERR) 170 goto error_exit; 171 172 /* Need either homing or cursor motion for refreshes */ 173 if (!t_cursor_home(new_screen->term) && 174 !t_cursor_address(new_screen->term)) 175 goto error_exit; 176 177 new_screen->winlistp = NULL; 178 179 if ((new_screen->curscr = __newwin(new_screen, 0, 180 0, 0, 0, FALSE)) == NULL) 181 goto error_exit; 182 183 if ((new_screen->stdscr = __newwin(new_screen, 0, 184 0, 0, 0, FALSE)) == NULL) { 185 delwin(new_screen->curscr); 186 goto error_exit; 187 } 188 189 clearok(new_screen->stdscr, 1); 190 191 if ((new_screen->__virtscr = __newwin(new_screen, 0, 192 0, 0, 0, FALSE)) == NULL) { 193 delwin(new_screen->curscr); 194 delwin(new_screen->stdscr); 195 goto error_exit; 196 } 197 198 __init_getch(new_screen); 199 __init_acs(new_screen); 200 #ifdef HAVE_WCHAR 201 __init_get_wch( new_screen ); 202 __init_wacs(new_screen); 203 #endif /* HAVE_WCHAR */ 204 205 __set_stophandler(); 206 __set_winchhandler(); 207 208 /* 209 * bleh - it seems that apps expect the first newterm to set 210 * up the curses screen.... emulate this. 211 */ 212 if (_cursesi_screen == NULL || _cursesi_screen->endwin) { 213 set_term(new_screen); 214 } 215 216 #ifdef DEBUG 217 __CTRACE(__CTRACE_SCREEN, "newterm: LINES = %d, COLS = %d\n", 218 LINES, COLS); 219 #endif 220 __startwin(new_screen); 221 222 return new_screen; 223 224 error_exit: 225 if (new_screen->term != NULL) 226 (void)del_curterm(new_screen->term); 227 free(new_screen->unget_list); 228 229 free(new_screen); 230 return NULL; 231 } 232 233 /* 234 * delscreen -- 235 * Free resources used by the given screen and destroy it. 236 * 237 */ 238 void 239 delscreen(SCREEN *screen) 240 { 241 struct __winlist *list; 242 243 #ifdef DEBUG 244 __CTRACE(__CTRACE_SCREEN, "delscreen(%p)\n", screen); 245 #endif 246 /* free up the terminfo stuff */ 247 del_curterm(screen->term); 248 249 /* walk the window list and kill all the parent windows */ 250 while ((list = screen->winlistp) != NULL) { 251 delwin(list->winp); 252 if (list == screen->winlistp) 253 /* sanity - abort if window didn't remove itself */ 254 break; 255 } 256 257 /* free the storage of the keymaps */ 258 _cursesi_free_keymap(screen->base_keymap); 259 260 free(screen->stdbuf); 261 free(screen->unget_list); 262 if (_cursesi_screen == screen) 263 _cursesi_screen = NULL; 264 free(screen); 265 } 266
Indexes created Tue Sep 23 02:09:52 GMT 2025