resize.c revision 1.27
1 /* $NetBSD: resize.c,v 1.27 2018/09/28 15:03:48 roy 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 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the University of 20 * California, Berkeley and its contributors. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 */ 37 38 #include <sys/cdefs.h> 39 #ifndef lint 40 #if 0 41 static char sccsid[] = "@(#)resize.c blymn 2001/08/26"; 42 #else 43 __RCSID("$NetBSD: resize.c,v 1.27 2018/09/28 15:03:48 roy Exp $"); 44 #endif 45 #endif /* not lint */ 46 47 #include <stdlib.h> 48 49 #include "curses.h" 50 #include "curses_private.h" 51 52 static int __resizeterm(WINDOW *win, int nlines, int ncols); 53 static int __resizewin(WINDOW *win, int nlines, int ncols); 54 55 /* 56 * wresize -- 57 * Resize the given window to the new size. 58 */ 59 int 60 wresize(WINDOW *win, int req_nlines, int req_ncols) 61 { 62 int nlines = req_nlines; 63 int ncols = req_ncols; 64 65 if (win == NULL) 66 return ERR; 67 68 #ifdef DEBUG 69 __CTRACE(__CTRACE_WINDOW, "wresize: (%p, %d, %d)\n", 70 win, nlines, ncols); 71 #endif 72 if (win->orig == NULL) { 73 /* bound "our" windows by the screen size */ 74 if (win == curscr || win == __virtscr || win == stdscr) { 75 if (nlines > LINES) 76 nlines = LINES; 77 if (nlines < 1) 78 nlines = 1; 79 if (ncols > COLS) 80 ncols = COLS; 81 if (ncols < 1) 82 ncols = 1; 83 } else { 84 if (win->begy > LINES) 85 win->begy = 0; 86 if (win->begy + nlines > LINES) 87 nlines = 0; 88 if (nlines <= 0) 89 nlines += LINES - win->begy; 90 if (nlines < 1) 91 nlines = 1; 92 if (win->begx > COLS) 93 win->begx = 0; 94 if (win->begx + ncols > COLS) 95 ncols = 0; 96 if (ncols <= 0) 97 ncols += COLS - win->begx; 98 if (ncols < 1) 99 ncols = 1; 100 } 101 } else { 102 /* subwins must fit inside the parent - check this */ 103 if (win->begy > win->orig->begy + win->orig->maxy) 104 win->begy = win->orig->begy + win->orig->maxy - 1; 105 if (win->begy + nlines > win->orig->begy + win->orig->maxy) 106 nlines = 0; 107 if (nlines <= 0) 108 nlines += win->orig->begy + win->orig->maxy - win->begy; 109 if (nlines < 1) 110 nlines = 1; 111 if (win->begx > win->orig->begx + win->orig->maxx) 112 win->begx = win->orig->begx + win->orig->maxx - 1; 113 if (win->begx + ncols > win->orig->begx + win->orig->maxx) 114 ncols = 0; 115 if (ncols <= 0) 116 ncols += win->orig->begx + win->orig->maxx - win->begx; 117 if (ncols < 1) 118 ncols = 1; 119 } 120 121 if ((__resizewin(win, nlines, ncols)) == ERR) 122 return ERR; 123 124 win->reqy = req_nlines; 125 win->reqx = req_ncols; 126 127 /* If someone resizes curscr, we must also resize __virtscr */ 128 if (win == curscr) { 129 if ((__resizewin(__virtscr, nlines, ncols)) == ERR) 130 return ERR; 131 __virtscr->reqy = req_nlines; 132 __virtscr->reqx = req_ncols; 133 } 134 135 return OK; 136 } 137 138 /* 139 * is_term_resized -- 140 * Return true if the given dimensions do not match the 141 * internal structures. 142 */ 143 bool 144 is_term_resized(int nlines, int ncols) 145 { 146 147 return (nlines > 0 && ncols > 0 && 148 (nlines != _cursesi_screen->LINES || 149 ncols != _cursesi_screen->COLS)); 150 } 151 152 /* 153 * resizeterm -- 154 * Resize the terminal window, resizing the dependent windows. 155 * Handles internal book-keeping. 156 */ 157 int 158 resizeterm(int nlines, int ncols) 159 { 160 int result; 161 162 #ifdef DEBUG 163 __CTRACE(__CTRACE_WINDOW, "resizeterm: (%d, %d)\n", nlines, ncols); 164 #endif 165 166 /* Unconditionally inform application screen has been resized. */ 167 _cursesi_screen->resized = 1; 168 169 if (!is_term_resized(nlines, ncols)) 170 return OK; 171 172 result = resize_term(nlines, ncols); 173 174 /* Screen contents are unknown, libcurses is not libpanel, we don't 175 * know the correct draw order. */ 176 clearok(curscr, TRUE); 177 178 if (result == OK) { 179 /* We know how to repaint the ripoffs */ 180 __ripoffresize(_cursesi_screen); 181 182 /* We do need to reposition our slks. */ 183 __slk_resize(_cursesi_screen, ncols); 184 __slk_noutrefresh(_cursesi_screen); 185 } 186 187 return result; 188 } 189 190 /* 191 * resize_term -- 192 * Resize the terminal window, resizing the dependent windows. 193 */ 194 int 195 resize_term(int nlines, int ncols) 196 { 197 WINDOW *win; 198 struct __winlist *list; 199 int rlines; 200 201 #ifdef DEBUG 202 __CTRACE(__CTRACE_WINDOW, "resize_term: (%d, %d)\n", nlines, ncols); 203 #endif 204 205 if (!is_term_resized(nlines, ncols)) 206 return OK; 207 208 if (__resizeterm(curscr, nlines, ncols) == ERR) 209 return ERR; 210 if (__resizeterm(__virtscr, nlines, ncols) == ERR) 211 return ERR; 212 rlines = nlines - __rippedlines(_cursesi_screen); 213 if (__resizeterm(stdscr, rlines, ncols) == ERR) 214 return ERR; 215 216 _cursesi_screen->LINES = nlines; 217 _cursesi_screen->COLS = ncols; 218 LINES = rlines; 219 COLS = ncols; 220 221 if (_cursesi_screen->slk_window != NULL && 222 __resizewin(_cursesi_screen->slk_window, 223 _cursesi_screen->slk_window->reqy, ncols) == ERR) 224 return ERR; 225 226 /* tweak the flags now that we have updated the LINES and COLS */ 227 for (list = _cursesi_screen->winlistp; list != NULL; list = list->nextp) { 228 win = list->winp; 229 230 if (!(win->flags & __ISPAD)) 231 __swflags(win); 232 } 233 234 return OK; 235 } 236 237 /* 238 * __resizeterm 239 * Setup window for resizing. 240 */ 241 static int 242 __resizeterm(WINDOW *win, int nlines, int ncols) 243 { 244 int newlines, newcols; 245 246 newlines = win->reqy; 247 if (win->begy + newlines >= nlines) 248 newlines = 0; 249 if (newlines == 0) 250 newlines = nlines - win->begy; 251 252 newcols = win->reqx; 253 if (win->begx + newcols >= ncols) 254 newcols = 0; 255 if (newcols == 0) 256 newcols = ncols - win->begx; 257 258 return __resizewin(win, newlines, newcols); 259 } 260 261 /* 262 * __resizewin -- 263 * Resize the given window. 264 */ 265 static int 266 __resizewin(WINDOW *win, int nlines, int ncols) 267 { 268 __LINE *lp, *olp, **newlines, *newlspace; 269 __LDATA *sp; 270 __LDATA *newwspace; 271 int i, j; 272 int y, x; 273 WINDOW *swin; 274 275 #ifdef DEBUG 276 __CTRACE(__CTRACE_WINDOW, "resize: (%p, %d, %d)\n", win, nlines, ncols); 277 __CTRACE(__CTRACE_WINDOW, "resize: win->wattr = %08x\n", win->wattr); 278 __CTRACE(__CTRACE_WINDOW, "resize: win->flags = %#.4x\n", win->flags); 279 __CTRACE(__CTRACE_WINDOW, "resize: win->maxy = %d\n", win->maxy); 280 __CTRACE(__CTRACE_WINDOW, "resize: win->maxx = %d\n", win->maxx); 281 __CTRACE(__CTRACE_WINDOW, "resize: win->begy = %d\n", win->begy); 282 __CTRACE(__CTRACE_WINDOW, "resize: win->begx = %d\n", win->begx); 283 __CTRACE(__CTRACE_WINDOW, "resize: win->scr_t = %d\n", win->scr_t); 284 __CTRACE(__CTRACE_WINDOW, "resize: win->scr_b = %d\n", win->scr_b); 285 #endif 286 287 /* 288 * free up any non-spacing storage before we lose the 289 * pointers... 290 */ 291 #ifdef HAVE_WCHAR 292 __cursesi_win_free_nsp(win); 293 #endif 294 295 if (nlines <= 0 || ncols <= 0) 296 nlines = ncols = 0; 297 else { 298 /* Reallocate line pointer array and line space. */ 299 newlines = realloc(win->alines, nlines * sizeof(__LINE *)); 300 if (newlines == NULL) 301 return ERR; 302 win->alines = newlines; 303 304 newlspace = realloc(win->lspace, nlines * sizeof(__LINE)); 305 if (newlspace == NULL) 306 return ERR; 307 win->lspace = newlspace; 308 } 309 310 /* Don't allocate window and line space if it's a subwindow */ 311 if (win->orig == NULL) { 312 /* 313 * Allocate window space in one chunk. 314 */ 315 if (ncols != 0) { 316 newwspace = realloc(win->wspace, 317 ncols * nlines * sizeof(__LDATA)); 318 if (newwspace == NULL) 319 return ERR; 320 win->wspace = newwspace; 321 } 322 323 /* 324 * Point line pointers to line space, and lines themselves into 325 * window space. 326 */ 327 for (lp = win->lspace, i = 0; i < nlines; i++, lp++) { 328 win->alines[i] = lp; 329 lp->line = &win->wspace[i * ncols]; 330 #ifdef DEBUG 331 lp->sentinel = SENTINEL_VALUE; 332 #endif 333 lp->firstchp = &lp->firstch; 334 lp->lastchp = &lp->lastch; 335 lp->firstch = 0; 336 lp->lastch = ncols - 1; 337 lp->flags = __ISDIRTY; 338 } 339 } else { 340 341 win->ch_off = win->begx - win->orig->begx; 342 /* Point line pointers to line space. */ 343 for (lp = win->lspace, i = 0; i < nlines; i++, lp++) { 344 win->alines[i] = lp; 345 olp = win->orig->alines[i + win->begy - win->orig->begy]; 346 lp->line = &olp->line[win->ch_off]; 347 #ifdef DEBUG 348 lp->sentinel = SENTINEL_VALUE; 349 #endif 350 lp->firstchp = &olp->firstch; 351 lp->lastchp = &olp->lastch; 352 lp->flags = __ISDIRTY; 353 } 354 } 355 356 win->cury = win->curx = 0; 357 win->maxy = nlines; 358 win->maxx = ncols; 359 win->scr_b = win->maxy - 1; 360 __swflags(win); 361 362 /* 363 * we must zot the window contents otherwise lines may pick 364 * up attributes from the previous line when the window is 365 * made smaller. The client will redraw the window anyway 366 * so this is no big deal. 367 */ 368 for (i = 0; i < win->maxy; i++) { 369 lp = win->alines[i]; 370 for (sp = lp->line, j = 0; j < win->maxx; j++, sp++) { 371 sp->attr = 0; 372 #ifndef HAVE_WCHAR 373 sp->ch = win->bch; 374 #else 375 sp->ch = (wchar_t)btowc((int)win->bch); 376 sp->nsp = NULL; 377 if (_cursesi_copy_nsp(win->bnsp, sp) == ERR) 378 return ERR; 379 SET_WCOL(*sp, 1); 380 #endif /* HAVE_WCHAR */ 381 } 382 lp->hash = __hash((char *)(void *)lp->line, 383 (size_t)(ncols * __LDATASIZE)); 384 } 385 386 #ifdef DEBUG 387 __CTRACE(__CTRACE_WINDOW, "resize: win->wattr = %08x\n", win->wattr); 388 __CTRACE(__CTRACE_WINDOW, "resize: win->flags = %#.4x\n", win->flags); 389 __CTRACE(__CTRACE_WINDOW, "resize: win->maxy = %d\n", win->maxy); 390 __CTRACE(__CTRACE_WINDOW, "resize: win->maxx = %d\n", win->maxx); 391 __CTRACE(__CTRACE_WINDOW, "resize: win->begy = %d\n", win->begy); 392 __CTRACE(__CTRACE_WINDOW, "resize: win->begx = %d\n", win->begx); 393 __CTRACE(__CTRACE_WINDOW, "resize: win->scr_t = %d\n", win->scr_t); 394 __CTRACE(__CTRACE_WINDOW, "resize: win->scr_b = %d\n", win->scr_b); 395 #endif 396 397 if (win->orig == NULL) { 398 /* bound subwindows to new size and fixup their pointers */ 399 for (swin = win->nextp; swin != win; swin = swin->nextp) { 400 y = swin->reqy; 401 if (swin->begy > win->begy + win->maxy) 402 swin->begy = win->begy + win->maxy - 1; 403 if (swin->begy + y > win->begy + win->maxy) 404 y = 0; 405 if (y <= 0) 406 y += win->begy + win->maxy - swin->begy; 407 if (y < 1) 408 y = 1; 409 x = swin->reqx; 410 if (swin->begx > win->begx + win->maxx) 411 swin->begx = win->begx + win->maxx - 1; 412 if (swin->begx + x > win->begx + win->maxx) 413 x = 0; 414 if (x <= 0) 415 x += win->begy + win->maxx - swin->begx; 416 if (x < 1) 417 x = 1; 418 __resizewin(swin, y, x); 419 } 420 } 421 422 return OK; 423 } 424
Indexes created Sun Sep 21 20:09:37 GMT 2025