screen.c revision 1.31
1 /* $NetBSD: screen.c,v 1.31 2017/01/31 09:17:53 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 1.31 2017/01/31 09:17:53 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 static void __delscreen(SCREEN *); 50 51 /* 52 * set_term -- 53 * Change the term to the given screen. 54 * 55 */ 56 SCREEN * 57 set_term(SCREEN *new) 58 { 59 SCREEN *old_screen = _cursesi_screen; 60 61 if (_cursesi_screen != NULL) { 62 /* save changes made to the current screen... */ 63 old_screen->echoit = __echoit; 64 old_screen->pfast = __pfast; 65 old_screen->rawmode = __rawmode; 66 old_screen->noqch = __noqch; 67 old_screen->COLS = COLS; 68 old_screen->LINES = LINES + __rippedlines(old_screen); 69 old_screen->ESCDELAY = ESCDELAY; 70 old_screen->TABSIZE = TABSIZE; 71 old_screen->COLORS = COLORS; 72 old_screen->COLOR_PAIRS = COLOR_PAIRS; 73 old_screen->GT = __GT; 74 old_screen->NONL = __NONL; 75 old_screen->UPPERCASE = __UPPERCASE; 76 } 77 78 _cursesi_screen = new; 79 80 __echoit = new->echoit; 81 __pfast = new->pfast; 82 __rawmode = new->rawmode; 83 __noqch = new->noqch; 84 COLS = new->COLS; 85 LINES = new->LINES - __rippedlines(new); 86 ESCDELAY = new->ESCDELAY; 87 TABSIZE = new->TABSIZE; 88 COLORS = new->COLORS; 89 COLOR_PAIRS = new->COLOR_PAIRS; 90 __GT = new->GT; 91 __NONL = new->NONL; 92 __UPPERCASE = new->UPPERCASE; 93 94 _cursesi_resetterm(new); 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 #ifdef HAVE_WCHAR 103 _cursesi_reset_wacs(new); 104 #endif /* HAVE_WCHAR */ 105 106 #ifdef DEBUG 107 __CTRACE(__CTRACE_SCREEN, "set_term: LINES = %d, COLS = %d\n", 108 LINES, COLS); 109 #endif 110 111 return old_screen; 112 } 113 114 /* 115 * newterm -- 116 * Set up a new screen. 117 * 118 */ 119 SCREEN * 120 newterm(char *type, FILE *outfd, FILE *infd) 121 { 122 SCREEN *new_screen; 123 char *sp; 124 int rtop; 125 126 sp = type; 127 if (type == NULL && (sp = getenv("TERM")) == NULL) 128 return NULL; 129 130 if ((new_screen = calloc(1, sizeof(SCREEN))) == NULL) 131 return NULL; 132 133 #ifdef DEBUG 134 __CTRACE(__CTRACE_INIT, "newterm\n"); 135 #endif 136 137 new_screen->infd = infd; 138 new_screen->checkfd = fileno(infd); 139 new_screen->outfd = outfd; 140 new_screen->echoit = new_screen->nl = 1; 141 new_screen->pfast = new_screen->rawmode = new_screen->noqch = 0; 142 new_screen->filtered = filtered; 143 filtered = FALSE; /* filter() must preceed each newterm() */ 144 new_screen->nca = A_NORMAL; 145 new_screen->color_type = COLOR_NONE; 146 new_screen->COLOR_PAIRS = 0; 147 new_screen->old_mode = 2; 148 new_screen->stdbuf = NULL; 149 new_screen->stdscr = NULL; 150 new_screen->curscr = NULL; 151 new_screen->__virtscr = NULL; 152 new_screen->curwin = 0; 153 new_screen->notty = FALSE; 154 new_screen->half_delay = FALSE; 155 new_screen->resized = 0; 156 new_screen->unget_len = 32; 157 158 if ((new_screen->unget_list = 159 malloc(sizeof(wchar_t) * new_screen->unget_len)) == NULL) 160 { 161 goto error_exit; 162 } 163 new_screen->unget_pos = 0; 164 165 if (_cursesi_gettmode(new_screen) == ERR) 166 goto error_exit; 167 168 if (_cursesi_setterm((char *)sp, new_screen) == ERR) 169 goto error_exit; 170 171 /* Need either homing or cursor motion for refreshes */ 172 if (!t_cursor_home(new_screen->term) && 173 !t_cursor_address(new_screen->term)) 174 goto error_exit; 175 176 new_screen->winlistp = NULL; 177 178 if ((new_screen->curscr = __newwin(new_screen, 0, 179 0, 0, 0, FALSE)) == NULL) 180 goto error_exit; 181 182 if ((new_screen->__virtscr = __newwin(new_screen, 0, 183 0, 0, 0, FALSE)) == NULL) 184 goto error_exit; 185 186 /* If Soft Label Keys are setup, they will ripoffline. */ 187 if (__slk_init(new_screen) == ERR) 188 goto error_exit; 189 190 if (__ripoffscreen(new_screen, &rtop) == ERR) 191 goto error_exit; 192 193 new_screen->stdscr = __newwin(new_screen, LINES, 0, rtop, 0, FALSE); 194 if (new_screen->stdscr == NULL) 195 goto error_exit; 196 197 clearok(new_screen->stdscr, 1); 198 199 __init_getch(new_screen); 200 __init_acs(new_screen); 201 #ifdef HAVE_WCHAR 202 __init_get_wch(new_screen); 203 __init_wacs(new_screen); 204 #endif /* HAVE_WCHAR */ 205 206 __set_stophandler(); 207 __set_winchhandler(); 208 209 /* 210 * bleh - it seems that apps expect the first newterm to set 211 * up the curses screen.... emulate this. 212 */ 213 if (_cursesi_screen == NULL || _cursesi_screen->endwin) { 214 set_term(new_screen); 215 } 216 217 #ifdef DEBUG 218 __CTRACE(__CTRACE_SCREEN, "newterm: LINES = %d, COLS = %d\n", 219 LINES, COLS); 220 #endif 221 __startwin(new_screen); 222 223 return new_screen; 224 225 error_exit: 226 __delscreen(new_screen); 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 { 241 242 #ifdef DEBUG 243 __CTRACE(__CTRACE_SCREEN, "delscreen(%p)\n", screen); 244 #endif 245 246 __delscreen(screen); 247 248 /* free the storage of the keymaps */ 249 _cursesi_free_keymap(screen->base_keymap); 250 251 /* free the Soft Label Keys */ 252 __slk_free(screen); 253 254 free(screen->stdbuf); 255 free(screen->unget_list); 256 if (_cursesi_screen == screen) 257 _cursesi_screen = NULL; 258 free(screen); 259 } 260 261 static void 262 __delscreen(SCREEN *screen) 263 { 264 struct __winlist *list; 265 266 /* free up the terminfo stuff */ 267 if (screen->term != NULL) 268 del_curterm(screen->term); 269 270 /* walk the window list and kill all the parent windows */ 271 while ((list = screen->winlistp) != NULL) { 272 delwin(list->winp); 273 if (list == screen->winlistp) 274 /* sanity - abort if window didn't remove itself */ 275 break; 276 } 277 } 278
Indexes created Mon Sep 22 13:09:51 GMT 2025