resize.c revision 1.26.12.1
1 /* $NetBSD: resize.c,v 1.26.12.1 2019/06/10 22:05:22 christos Exp $ */ 2 3 /* 4 * Copyright (c) 2001 5 * Brett Lymn. 6 * 7 * This code has been donated to The NetBSD Foundation by the Author. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #include <sys/cdefs.h> 32 #ifndef lint 33 #if 0 34 static char sccsid[] = "@(#)resize.c blymn 2001/08/26"; 35 #else 36 __RCSID("$NetBSD: resize.c,v 1.26.12.1 2019/06/10 22:05:22 christos Exp $"); 37 #endif 38 #endif /* not lint */ 39 40 #include <stdlib.h> 41 42 #include "curses.h" 43 #include "curses_private.h" 44 45 static int __resizeterm(WINDOW *win, int nlines, int ncols); 46 static int __resizewin(WINDOW *win, int nlines, int ncols); 47 48 /* 49 * wresize -- 50 * Resize the given window to the new size. 51 */ 52 int 53 wresize(WINDOW *win, int req_nlines, int req_ncols) 54 { 55 int nlines = req_nlines; 56 int ncols = req_ncols; 57 58 if (win == NULL) 59 return ERR; 60 61 #ifdef DEBUG 62 __CTRACE(__CTRACE_WINDOW, "wresize: (%p, %d, %d)\n", 63 win, nlines, ncols); 64 #endif 65 if (win->orig == NULL) { 66 /* bound "our" windows by the screen size */ 67 if (win == curscr || win == __virtscr || win == stdscr) { 68 if (nlines > LINES) 69 nlines = LINES; 70 if (nlines < 1) 71 nlines = 1; 72 if (ncols > COLS) 73 ncols = COLS; 74 if (ncols < 1) 75 ncols = 1; 76 } else { 77 if (win->begy > LINES) 78 win->begy = 0; 79 if (win->begy + nlines > LINES) 80 nlines = 0; 81 if (nlines <= 0) 82 nlines += LINES - win->begy; 83 if (nlines < 1) 84 nlines = 1; 85 if (win->begx > COLS) 86 win->begx = 0; 87 if (win->begx + ncols > COLS) 88 ncols = 0; 89 if (ncols <= 0) 90 ncols += COLS - win->begx; 91 if (ncols < 1) 92 ncols = 1; 93 } 94 } else { 95 /* subwins must fit inside the parent - check this */ 96 if (win->begy > win->orig->begy + win->orig->maxy) 97 win->begy = win->orig->begy + win->orig->maxy - 1; 98 if (win->begy + nlines > win->orig->begy + win->orig->maxy) 99 nlines = 0; 100 if (nlines <= 0) 101 nlines += win->orig->begy + win->orig->maxy - win->begy; 102 if (nlines < 1) 103 nlines = 1; 104 if (win->begx > win->orig->begx + win->orig->maxx) 105 win->begx = win->orig->begx + win->orig->maxx - 1; 106 if (win->begx + ncols > win->orig->begx + win->orig->maxx) 107 ncols = 0; 108 if (ncols <= 0) 109 ncols += win->orig->begx + win->orig->maxx - win->begx; 110 if (ncols < 1) 111 ncols = 1; 112 } 113 114 if ((__resizewin(win, nlines, ncols)) == ERR) 115 return ERR; 116 117 win->reqy = req_nlines; 118 win->reqx = req_ncols; 119 120 /* If someone resizes curscr, we must also resize __virtscr */ 121 if (win == curscr) { 122 if ((__resizewin(__virtscr, nlines, ncols)) == ERR) 123 return ERR; 124 __virtscr->reqy = req_nlines; 125 __virtscr->reqx = req_ncols; 126 } 127 128 return OK; 129 } 130 131 /* 132 * is_term_resized -- 133 * Return true if the given dimensions do not match the 134 * internal structures. 135 */ 136 bool 137 is_term_resized(int nlines, int ncols) 138 { 139 140 return (nlines > 0 && ncols > 0 && 141 (nlines != _cursesi_screen->LINES || 142 ncols != _cursesi_screen->COLS)); 143 } 144 145 /* 146 * resizeterm -- 147 * Resize the terminal window, resizing the dependent windows. 148 * Handles internal book-keeping. 149 */ 150 int 151 resizeterm(int nlines, int ncols) 152 { 153 int result; 154 155 #ifdef DEBUG 156 __CTRACE(__CTRACE_WINDOW, "resizeterm: (%d, %d)\n", nlines, ncols); 157 #endif 158 159 /* Unconditionally inform application screen has been resized. */ 160 _cursesi_screen->resized = 1; 161 162 if (!is_term_resized(nlines, ncols)) 163 return OK; 164 165 result = resize_term(nlines, ncols); 166 167 /* Screen contents are unknown, libcurses is not libpanel, we don't 168 * know the correct draw order. */ 169 clearok(curscr, TRUE); 170 171 if (result == OK) { 172 /* Redraw the soft label keys to the new size. */ 173 __slk_resize(_cursesi_screen, ncols); 174 __slk_noutrefresh(_cursesi_screen); 175 } 176 177 return result; 178 } 179 180 /* 181 * resize_term -- 182 * Resize the terminal window, resizing the dependent windows. 183 */ 184 int 185 resize_term(int nlines, int ncols) 186 { 187 WINDOW *win; 188 struct __winlist *list; 189 int rlines; 190 191 #ifdef DEBUG 192 __CTRACE(__CTRACE_WINDOW, "resize_term: (%d, %d)\n", nlines, ncols); 193 #endif 194 195 if (!is_term_resized(nlines, ncols)) 196 return OK; 197 198 if (__resizeterm(curscr, nlines, ncols) == ERR) 199 return ERR; 200 if (__resizeterm(__virtscr, nlines, ncols) == ERR) 201 return ERR; 202 rlines = nlines - __rippedlines(_cursesi_screen, 0); 203 if (__resizeterm(stdscr, rlines, ncols) == ERR) 204 return ERR; 205 206 _cursesi_screen->LINES = nlines; 207 _cursesi_screen->COLS = ncols; 208 LINES = nlines; 209 COLS = ncols; 210 211 /* tweak the flags now that we have updated the LINES and COLS */ 212 for (list = _cursesi_screen->winlistp; list != NULL; list = list->nextp) { 213 win = list->winp; 214 215 if (!(win->flags & __ISPAD)) 216 __swflags(win); 217 } 218 219 /* Resize and re-position the ripped off windows. */ 220 if (__ripoffresize(_cursesi_screen) == ERR) 221 return ERR; 222 223 return OK; 224 } 225 226 /* 227 * __resizeterm 228 * Setup window for resizing. 229 */ 230 static int 231 __resizeterm(WINDOW *win, int nlines, int ncols) 232 { 233 int newlines, newcols; 234 235 newlines = win->reqy; 236 if (win->begy + newlines >= nlines) 237 newlines = 0; 238 if (newlines == 0) 239 newlines = nlines - win->begy; 240 241 newcols = win->reqx; 242 if (win->begx + newcols >= ncols) 243 newcols = 0; 244 if (newcols == 0) 245 newcols = ncols - win->begx; 246 247 return __resizewin(win, newlines, newcols); 248 } 249 250 /* 251 * __resizewin -- 252 * Resize the given window. 253 */ 254 static int 255 __resizewin(WINDOW *win, int nlines, int ncols) 256 { 257 __LINE *lp, *olp, **newlines, *newlspace; 258 __LDATA *sp; 259 __LDATA *newwspace; 260 int i, j; 261 int y, x; 262 WINDOW *swin; 263 264 #ifdef DEBUG 265 __CTRACE(__CTRACE_WINDOW, "resize: (%p, %d, %d)\n", win, nlines, ncols); 266 __CTRACE(__CTRACE_WINDOW, "resize: win->wattr = %08x\n", win->wattr); 267 __CTRACE(__CTRACE_WINDOW, "resize: win->flags = %#.4x\n", win->flags); 268 __CTRACE(__CTRACE_WINDOW, "resize: win->maxy = %d\n", win->maxy); 269 __CTRACE(__CTRACE_WINDOW, "resize: win->maxx = %d\n", win->maxx); 270 __CTRACE(__CTRACE_WINDOW, "resize: win->begy = %d\n", win->begy); 271 __CTRACE(__CTRACE_WINDOW, "resize: win->begx = %d\n", win->begx); 272 __CTRACE(__CTRACE_WINDOW, "resize: win->scr_t = %d\n", win->scr_t); 273 __CTRACE(__CTRACE_WINDOW, "resize: win->scr_b = %d\n", win->scr_b); 274 #endif 275 276 /* 277 * free up any non-spacing storage before we lose the 278 * pointers... 279 */ 280 #ifdef HAVE_WCHAR 281 __cursesi_win_free_nsp(win); 282 #endif 283 284 if (nlines <= 0 || ncols <= 0) 285 nlines = ncols = 0; 286 else { 287 /* Reallocate line pointer array and line space. */ 288 newlines = realloc(win->alines, nlines * sizeof(__LINE *)); 289 if (newlines == NULL) 290 return ERR; 291 win->alines = newlines; 292 293 newlspace = realloc(win->lspace, nlines * sizeof(__LINE)); 294 if (newlspace == NULL) 295 return ERR; 296 win->lspace = newlspace; 297 } 298 299 /* Don't allocate window and line space if it's a subwindow */ 300 if (win->orig == NULL) { 301 /* 302 * Allocate window space in one chunk. 303 */ 304 if (ncols != 0) { 305 newwspace = realloc(win->wspace, 306 ncols * nlines * sizeof(__LDATA)); 307 if (newwspace == NULL) 308 return ERR; 309 win->wspace = newwspace; 310 } 311 312 /* 313 * Point line pointers to line space, and lines themselves into 314 * window space. 315 */ 316 for (lp = win->lspace, i = 0; i < nlines; i++, lp++) { 317 win->alines[i] = lp; 318 lp->line = &win->wspace[i * ncols]; 319 #ifdef DEBUG 320 lp->sentinel = SENTINEL_VALUE; 321 #endif 322 lp->firstchp = &lp->firstch; 323 lp->lastchp = &lp->lastch; 324 lp->firstch = 0; 325 lp->lastch = ncols - 1; 326 lp->flags = __ISDIRTY; 327 } 328 } else { 329 330 win->ch_off = win->begx - win->orig->begx; 331 /* Point line pointers to line space. */ 332 for (lp = win->lspace, i = 0; i < nlines; i++, lp++) { 333 win->alines[i] = lp; 334 olp = win->orig->alines[i + win->begy - win->orig->begy]; 335 lp->line = &olp->line[win->ch_off]; 336 #ifdef DEBUG 337 lp->sentinel = SENTINEL_VALUE; 338 #endif 339 lp->firstchp = &olp->firstch; 340 lp->lastchp = &olp->lastch; 341 lp->flags = __ISDIRTY; 342 } 343 } 344 345 win->cury = win->curx = 0; 346 win->maxy = nlines; 347 win->maxx = ncols; 348 win->scr_b = win->maxy - 1; 349 __swflags(win); 350 351 /* 352 * we must zot the window contents otherwise lines may pick 353 * up attributes from the previous line when the window is 354 * made smaller. The client will redraw the window anyway 355 * so this is no big deal. 356 */ 357 for (i = 0; i < win->maxy; i++) { 358 lp = win->alines[i]; 359 for (sp = lp->line, j = 0; j < win->maxx; j++, sp++) { 360 sp->attr = 0; 361 #ifndef HAVE_WCHAR 362 sp->ch = win->bch; 363 #else 364 sp->ch = (wchar_t)btowc((int)win->bch); 365 sp->nsp = NULL; 366 if (_cursesi_copy_nsp(win->bnsp, sp) == ERR) 367 return ERR; 368 SET_WCOL(*sp, 1); 369 #endif /* HAVE_WCHAR */ 370 } 371 lp->hash = __hash((char *)(void *)lp->line, 372 (size_t)(ncols * __LDATASIZE)); 373 } 374 375 #ifdef DEBUG 376 __CTRACE(__CTRACE_WINDOW, "resize: win->wattr = %08x\n", win->wattr); 377 __CTRACE(__CTRACE_WINDOW, "resize: win->flags = %#.4x\n", win->flags); 378 __CTRACE(__CTRACE_WINDOW, "resize: win->maxy = %d\n", win->maxy); 379 __CTRACE(__CTRACE_WINDOW, "resize: win->maxx = %d\n", win->maxx); 380 __CTRACE(__CTRACE_WINDOW, "resize: win->begy = %d\n", win->begy); 381 __CTRACE(__CTRACE_WINDOW, "resize: win->begx = %d\n", win->begx); 382 __CTRACE(__CTRACE_WINDOW, "resize: win->scr_t = %d\n", win->scr_t); 383 __CTRACE(__CTRACE_WINDOW, "resize: win->scr_b = %d\n", win->scr_b); 384 #endif 385 386 if (win->orig == NULL) { 387 /* bound subwindows to new size and fixup their pointers */ 388 for (swin = win->nextp; swin != win; swin = swin->nextp) { 389 y = swin->reqy; 390 if (swin->begy > win->begy + win->maxy) 391 swin->begy = win->begy + win->maxy - 1; 392 if (swin->begy + y > win->begy + win->maxy) 393 y = 0; 394 if (y <= 0) 395 y += win->begy + win->maxy - swin->begy; 396 if (y < 1) 397 y = 1; 398 x = swin->reqx; 399 if (swin->begx > win->begx + win->maxx) 400 swin->begx = win->begx + win->maxx - 1; 401 if (swin->begx + x > win->begx + win->maxx) 402 x = 0; 403 if (x <= 0) 404 x += win->begy + win->maxx - swin->begx; 405 if (x < 1) 406 x = 1; 407 __resizewin(swin, y, x); 408 } 409 } 410 411 return OK; 412 } 413
Indexes created Sat Sep 20 22:09:52 GMT 2025