1 /* $OpenBSD: lib_set_term.c,v 1.10 2000/07/10 03:06:15 millert Exp $ */ 2 3 /**************************************************************************** 4 * Copyright (c) 1998,1999,2000 Free Software Foundation, Inc. * 5 * * 6 * Permission is hereby granted, free of charge, to any person obtaining a * 7 * copy of this software and associated documentation files (the * 8 * "Software"), to deal in the Software without restriction, including * 9 * without limitation the rights to use, copy, modify, merge, publish, * 10 * distribute, distribute with modifications, sublicense, and/or sell * 11 * copies of the Software, and to permit persons to whom the Software is * 12 * furnished to do so, subject to the following conditions: * 13 * * 14 * The above copyright notice and this permission notice shall be included * 15 * in all copies or substantial portions of the Software. * 16 * * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * 18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * 19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * 20 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * 21 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 22 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 23 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 24 * * 25 * Except as contained in this notice, the name(s) of the above copyright * 26 * holders shall not be used in advertising or otherwise to promote the * 27 * sale, use or other dealings in this Software without prior written * 28 * authorization. * 29 ****************************************************************************/ 30 31 /**************************************************************************** 32 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 * 33 * and: Eric S. Raymond <esr@snark.thyrsus.com> * 34 ****************************************************************************/ 35 36 /* 37 ** lib_set_term.c 38 ** 39 ** The routine set_term(). 40 ** 41 */ 42 43 #include <curses.priv.h> 44 45 #include <term.h> /* cur_term */ 46 #include <tic.h> 47 48 MODULE_ID("$From: lib_set_term.c,v 1.55 2000/07/02 00:22:18 tom Exp $") 49 50 SCREEN * 51 set_term(SCREEN * screenp) 52 { 53 SCREEN *oldSP; 54 55 T((T_CALLED("set_term(%p)"), screenp)); 56 57 oldSP = SP; 58 _nc_set_screen(screenp); 59 60 set_curterm(SP->_term); 61 curscr = SP->_curscr; 62 newscr = SP->_newscr; 63 stdscr = SP->_stdscr; 64 COLORS = SP->_color_count; 65 COLOR_PAIRS = SP->_pair_count; 66 memcpy(acs_map, SP->_acs_map, sizeof(chtype) * ACS_LEN); 67 68 T((T_RETURN("%p"), oldSP)); 69 return (oldSP); 70 } 71 72 static void 73 _nc_free_keytry(struct tries *kt) 74 { 75 if (kt != 0) { 76 _nc_free_keytry(kt->child); 77 _nc_free_keytry(kt->sibling); 78 free(kt); 79 } 80 } 81 82 /* 83 * Free the storage associated with the given SCREEN sp. 84 */ 85 void 86 delscreen(SCREEN * sp) 87 { 88 SCREEN **scan = &_nc_screen_chain; 89 90 T((T_CALLED("delscreen(%p)"), sp)); 91 92 while (*scan) { 93 if (*scan == sp) { 94 *scan = sp->_next_screen; 95 break; 96 } 97 scan = &(*scan)->_next_screen; 98 } 99 100 _nc_freewin(sp->_curscr); 101 _nc_freewin(sp->_newscr); 102 _nc_freewin(sp->_stdscr); 103 _nc_free_keytry(sp->_keytry); 104 _nc_free_keytry(sp->_key_ok); 105 106 FreeIfNeeded(sp->_color_table); 107 FreeIfNeeded(sp->_color_pairs); 108 109 FreeIfNeeded(sp->oldhash); 110 FreeIfNeeded(sp->newhash); 111 112 del_curterm(sp->_term); 113 114 /* 115 * If the associated output stream has been closed, we can discard the 116 * set-buffer. Limit the error check to EBADF, since fflush may fail 117 * for other reasons than trying to operate upon a closed stream. 118 */ 119 if (sp->_ofp != 0 120 && sp->_setbuf != 0 121 && fflush(sp->_ofp) != 0 122 && errno == EBADF) { 123 free(sp->_setbuf); 124 } 125 126 free(sp); 127 128 /* 129 * If this was the current screen, reset everything that the 130 * application might try to use (except cur_term, which may have 131 * multiple references in different screens). 132 */ 133 if (sp == SP) { 134 curscr = 0; 135 newscr = 0; 136 stdscr = 0; 137 COLORS = 0; 138 COLOR_PAIRS = 0; 139 _nc_set_screen(0); 140 } 141 returnVoid; 142 } 143 144 static ripoff_t rippedoff[5]; 145 static ripoff_t *rsp = rippedoff; 146 #define N_RIPS SIZEOF(rippedoff) 147 148 static bool 149 no_mouse_event(SCREEN * sp GCC_UNUSED) 150 { 151 return FALSE; 152 } 153 154 static bool 155 no_mouse_inline(SCREEN * sp GCC_UNUSED) 156 { 157 return FALSE; 158 } 159 160 static bool 161 no_mouse_parse(int code GCC_UNUSED) 162 { 163 return TRUE; 164 } 165 166 static void 167 no_mouse_resume(SCREEN * sp GCC_UNUSED) 168 { 169 } 170 171 static void 172 no_mouse_wrap(SCREEN * sp GCC_UNUSED) 173 { 174 } 175 176 #if defined(NCURSES_EXT_FUNCS) && defined(USE_COLORFGBG) 177 static char * 178 extract_fgbg(char *src, int *result) 179 { 180 char *dst = 0; 181 long value = strtol(src, &dst, 0); 182 183 if (dst == 0) { 184 dst = src; 185 } else if (value >= 0) { 186 *result = value % max_colors; 187 } 188 while (*dst != 0 && *dst != ';') 189 dst++; 190 if (*dst == ';') 191 dst++; 192 return dst; 193 } 194 #endif 195 196 int 197 _nc_setupscreen(short slines, short const scolumns, FILE * output) 198 /* OS-independent screen initializations */ 199 { 200 int bottom_stolen = 0; 201 size_t i; 202 203 assert(SP == 0); /* has been reset in newterm() ! */ 204 if (!_nc_alloc_screen()) 205 return ERR; 206 207 SP->_next_screen = _nc_screen_chain; 208 _nc_screen_chain = SP; 209 210 _nc_set_buffer(output, TRUE); 211 SP->_term = cur_term; 212 SP->_lines = slines; 213 SP->_lines_avail = slines; 214 SP->_columns = scolumns; 215 SP->_cursrow = -1; 216 SP->_curscol = -1; 217 SP->_nl = TRUE; 218 SP->_raw = FALSE; 219 SP->_cbreak = 0; 220 SP->_echo = TRUE; 221 SP->_fifohead = -1; 222 SP->_endwin = TRUE; 223 SP->_ofp = output; 224 SP->_cursor = -1; /* cannot know real cursor shape */ 225 #ifdef NCURSES_NO_PADDING 226 SP->_no_padding = getenv("NCURSES_NO_PADDING") != 0; 227 TR(TRACE_CHARPUT | TRACE_MOVE, ("padding will%s be used", 228 SP->_no_padding ? " not" : "")); 229 #endif 230 #ifdef NCURSES_EXT_FUNCS 231 SP->_default_color = FALSE; 232 SP->_has_sgr_39_49 = FALSE; 233 SP->_default_fg = COLOR_WHITE; 234 SP->_default_bg = COLOR_BLACK; 235 #ifdef USE_COLORFGBG 236 /* 237 * If rxvt's $COLORFGBG variable is set, use it to specify the assumed 238 * default colors. Note that rxvt (mis)uses bold colors, equating a bold 239 * color to that value plus 8. We'll only use the non-bold color for now - 240 * decide later if it is worth having default attributes as well. 241 */ 242 if (getenv("COLORFGBG") != 0) { 243 char *p = getenv("COLORFGBG"); 244 p = extract_fgbg(p, &(SP->_default_fg)); 245 p = extract_fgbg(p, &(SP->_default_bg)); 246 } 247 #endif 248 #endif /* NCURSES_EXT_FUNCS */ 249 250 SP->_maxclick = DEFAULT_MAXCLICK; 251 SP->_mouse_event = no_mouse_event; 252 SP->_mouse_inline = no_mouse_inline; 253 SP->_mouse_parse = no_mouse_parse; 254 SP->_mouse_resume = no_mouse_resume; 255 SP->_mouse_wrap = no_mouse_wrap; 256 SP->_mouse_fd = -1; 257 258 /* initialize the panel hooks */ 259 SP->_panelHook.top_panel = (struct panel *) 0; 260 SP->_panelHook.bottom_panel = (struct panel *) 0; 261 SP->_panelHook.stdscr_pseudo_panel = (struct panel *) 0; 262 263 /* 264 * If we've no magic cookie support, we suppress attributes that xmc 265 * would affect, i.e., the attributes that affect the rendition of a 266 * space. Note that this impacts the alternate character set mapping 267 * as well. 268 */ 269 if (magic_cookie_glitch > 0) { 270 271 SP->_xmc_triggers = termattrs() & ( 272 A_ALTCHARSET | 273 A_BLINK | 274 A_BOLD | 275 A_REVERSE | 276 A_STANDOUT | 277 A_UNDERLINE 278 ); 279 SP->_xmc_suppress = SP->_xmc_triggers & (chtype) ~ (A_BOLD); 280 281 T(("magic cookie attributes %s", _traceattr(SP->_xmc_suppress))); 282 #if USE_XMC_SUPPORT 283 /* 284 * To keep this simple, suppress all of the optimization hooks 285 * except for clear_screen and the cursor addressing. 286 */ 287 clr_eol = 0; 288 clr_eos = 0; 289 set_attributes = 0; 290 #else 291 magic_cookie_glitch = ABSENT_NUMERIC; 292 acs_chars = 0; 293 #endif 294 } 295 _nc_init_acs(); 296 memcpy(SP->_acs_map, acs_map, sizeof(chtype) * ACS_LEN); 297 298 _nc_idcok = TRUE; 299 _nc_idlok = FALSE; 300 301 _nc_windows = 0; /* no windows yet */ 302 303 SP->oldhash = 0; 304 SP->newhash = 0; 305 306 T(("creating newscr")); 307 if ((newscr = newwin(slines, scolumns, 0, 0)) == 0) 308 return ERR; 309 310 T(("creating curscr")); 311 if ((curscr = newwin(slines, scolumns, 0, 0)) == 0) 312 return ERR; 313 314 SP->_newscr = newscr; 315 SP->_curscr = curscr; 316 #if USE_SIZECHANGE 317 SP->_resize = resizeterm; 318 #endif 319 320 newscr->_clear = TRUE; 321 curscr->_clear = FALSE; 322 323 for (i = 0, rsp = rippedoff; rsp->line && (i < N_RIPS); rsp++, i++) { 324 if (rsp->hook) { 325 WINDOW *w; 326 int count = (rsp->line < 0) ? -rsp->line : rsp->line; 327 328 if (rsp->line < 0) { 329 w = newwin(count, scolumns, SP->_lines_avail - count, 0); 330 if (w) { 331 rsp->w = w; 332 rsp->hook(w, scolumns); 333 bottom_stolen += count; 334 } else 335 return ERR; 336 } else { 337 w = newwin(count, scolumns, 0, 0); 338 if (w) { 339 rsp->w = w; 340 rsp->hook(w, scolumns); 341 SP->_topstolen += count; 342 } else 343 return ERR; 344 } 345 SP->_lines_avail -= count; 346 } 347 rsp->line = 0; 348 } 349 /* reset the stack */ 350 rsp = rippedoff; 351 352 T(("creating stdscr")); 353 assert((SP->_lines_avail + SP->_topstolen + bottom_stolen) == slines); 354 if ((stdscr = newwin(LINES = SP->_lines_avail, scolumns, 0, 0)) == 0) 355 return ERR; 356 SP->_stdscr = stdscr; 357 358 def_shell_mode(); 359 def_prog_mode(); 360 361 return OK; 362 } 363 364 /* The internal implementation interprets line as the number of 365 lines to rip off from the top or bottom. 366 */ 367 int 368 _nc_ripoffline(int line, int (*init) (WINDOW *, int)) 369 { 370 if (line == 0) 371 return (OK); 372 373 if (rsp >= rippedoff + N_RIPS) 374 return (ERR); 375 376 rsp->line = line; 377 rsp->hook = init; 378 rsp->w = 0; 379 rsp++; 380 381 return (OK); 382 } 383 384 int 385 ripoffline(int line, int (*init) (WINDOW *, int)) 386 { 387 T((T_CALLED("ripoffline(%d,%p)"), line, init)); 388 389 if (line == 0) 390 returnCode(OK); 391 392 returnCode(_nc_ripoffline((line < 0) ? -1 : 1, init)); 393 } 394