resize.c revision 1.24
1 /* $NetBSD: resize.c,v 1.24 2017/01/10 23:28:45 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 1.24 2017/01/10 23:28:45 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 if (!is_term_resized(nlines, ncols)) 167 return OK; 168 169 result = resize_term(nlines, ncols); 170 clearok(curscr, TRUE); 171 return result; 172 } 173 174 /* 175 * resize_term -- 176 * Resize the terminal window, resizing the dependent windows. 177 */ 178 int 179 resize_term(int nlines, int ncols) 180 { 181 WINDOW *win; 182 struct __winlist *list; 183 184 #ifdef DEBUG 185 __CTRACE(__CTRACE_WINDOW, "resize_term: (%d, %d)\n", nlines, ncols); 186 #endif 187 188 if (!is_term_resized(nlines, ncols)) 189 return OK; 190 191 if (__resizeterm(curscr, nlines, ncols) == ERR) 192 return ERR; 193 if (__resizeterm(__virtscr, nlines, ncols) == ERR) 194 return ERR; 195 nlines -= _cursesi_screen->ripped_top - _cursesi_screen->ripped_bottom; 196 if (__resizeterm(stdscr, nlines, ncols) == ERR) 197 return ERR; 198 199 LINES = nlines; 200 COLS = ncols; 201 202 /* tweak the flags now that we have updated the LINES and COLS */ 203 for (list = _cursesi_screen->winlistp; list != NULL; list = list->nextp) { 204 win = list->winp; 205 206 if (!(win->flags & __ISPAD)) 207 __swflags(win); 208 } 209 210 return OK; 211 } 212 213 /* 214 * __resizeterm 215 * Setup window for resizing. 216 */ 217 static int 218 __resizeterm(WINDOW *win, int nlines, int ncols) 219 { 220 int newlines, newcols; 221 222 newlines = win->reqy; 223 if (win->begy + newlines >= nlines) 224 newlines = 0; 225 if (newlines == 0) 226 newlines = nlines - win->begy; 227 228 newcols = win->reqx; 229 if (win->begx + newcols >= ncols) 230 newcols = 0; 231 if (newcols == 0) 232 newcols = ncols - win->begx; 233 234 return __resizewin(win, newlines, newcols); 235 } 236 237 /* 238 * __resizewin -- 239 * Resize the given window. 240 */ 241 static int 242 __resizewin(WINDOW *win, int nlines, int ncols) 243 { 244 __LINE *lp, *olp, **newlines, *newlspace; 245 __LDATA *sp; 246 __LDATA *newwspace; 247 int i, j; 248 int y, x; 249 WINDOW *swin; 250 251 #ifdef DEBUG 252 __CTRACE(__CTRACE_WINDOW, "resize: (%p, %d, %d)\n", win, nlines, ncols); 253 __CTRACE(__CTRACE_WINDOW, "resize: win->wattr = %08x\n", win->wattr); 254 __CTRACE(__CTRACE_WINDOW, "resize: win->flags = %#.4x\n", win->flags); 255 __CTRACE(__CTRACE_WINDOW, "resize: win->maxy = %d\n", win->maxy); 256 __CTRACE(__CTRACE_WINDOW, "resize: win->maxx = %d\n", win->maxx); 257 __CTRACE(__CTRACE_WINDOW, "resize: win->begy = %d\n", win->begy); 258 __CTRACE(__CTRACE_WINDOW, "resize: win->begx = %d\n", win->begx); 259 __CTRACE(__CTRACE_WINDOW, "resize: win->scr_t = %d\n", win->scr_t); 260 __CTRACE(__CTRACE_WINDOW, "resize: win->scr_b = %d\n", win->scr_b); 261 #endif 262 263 /* 264 * free up any non-spacing storage before we lose the 265 * pointers... 266 */ 267 #ifdef HAVE_WCHAR 268 __cursesi_win_free_nsp(win); 269 #endif 270 271 if (nlines <= 0 || ncols <= 0) 272 nlines = ncols = 0; 273 else { 274 /* Reallocate line pointer array and line space. */ 275 newlines = realloc(win->alines, nlines * sizeof(__LINE *)); 276 if (newlines == NULL) 277 return ERR; 278 win->alines = newlines; 279 280 newlspace = realloc(win->lspace, nlines * sizeof(__LINE)); 281 if (newlspace == NULL) 282 return ERR; 283 win->lspace = newlspace; 284 } 285 286 /* Don't allocate window and line space if it's a subwindow */ 287 if (win->orig == NULL) { 288 /* 289 * Allocate window space in one chunk. 290 */ 291 if (ncols != 0) { 292 newwspace = realloc(win->wspace, 293 ncols * nlines * sizeof(__LDATA)); 294 if (newwspace == NULL) 295 return ERR; 296 win->wspace = newwspace; 297 } 298 299 /* 300 * Point line pointers to line space, and lines themselves into 301 * window space. 302 */ 303 for (lp = win->lspace, i = 0; i < nlines; i++, lp++) { 304 win->alines[i] = lp; 305 lp->line = &win->wspace[i * ncols]; 306 #ifdef DEBUG 307 lp->sentinel = SENTINEL_VALUE; 308 #endif 309 lp->firstchp = &lp->firstch; 310 lp->lastchp = &lp->lastch; 311 lp->firstch = 0; 312 lp->lastch = ncols - 1; 313 lp->flags = __ISDIRTY; 314 } 315 } else { 316 317 win->ch_off = win->begx - win->orig->begx; 318 /* Point line pointers to line space. */ 319 for (lp = win->lspace, i = 0; i < nlines; i++, lp++) { 320 win->alines[i] = lp; 321 olp = win->orig->alines[i + win->begy - win->orig->begy]; 322 lp->line = &olp->line[win->ch_off]; 323 #ifdef DEBUG 324 lp->sentinel = SENTINEL_VALUE; 325 #endif 326 lp->firstchp = &olp->firstch; 327 lp->lastchp = &olp->lastch; 328 lp->flags = __ISDIRTY; 329 } 330 } 331 332 win->cury = win->curx = 0; 333 win->maxy = nlines; 334 win->maxx = ncols; 335 win->scr_b = win->maxy - 1; 336 __swflags(win); 337 338 /* 339 * we must zot the window contents otherwise lines may pick 340 * up attributes from the previous line when the window is 341 * made smaller. The client will redraw the window anyway 342 * so this is no big deal. 343 */ 344 for (i = 0; i < win->maxy; i++) { 345 lp = win->alines[i]; 346 for (sp = lp->line, j = 0; j < win->maxx; j++, sp++) { 347 sp->attr = 0; 348 #ifndef HAVE_WCHAR 349 sp->ch = win->bch; 350 #else 351 sp->ch = (wchar_t)btowc((int)win->bch); 352 sp->nsp = NULL; 353 if (_cursesi_copy_nsp(win->bnsp, sp) == ERR) 354 return ERR; 355 SET_WCOL(*sp, 1); 356 #endif /* HAVE_WCHAR */ 357 } 358 lp->hash = __hash((char *)(void *)lp->line, 359 (size_t)(ncols * __LDATASIZE)); 360 } 361 362 #ifdef DEBUG 363 __CTRACE(__CTRACE_WINDOW, "resize: win->wattr = %08x\n", win->wattr); 364 __CTRACE(__CTRACE_WINDOW, "resize: win->flags = %#.4x\n", win->flags); 365 __CTRACE(__CTRACE_WINDOW, "resize: win->maxy = %d\n", win->maxy); 366 __CTRACE(__CTRACE_WINDOW, "resize: win->maxx = %d\n", win->maxx); 367 __CTRACE(__CTRACE_WINDOW, "resize: win->begy = %d\n", win->begy); 368 __CTRACE(__CTRACE_WINDOW, "resize: win->begx = %d\n", win->begx); 369 __CTRACE(__CTRACE_WINDOW, "resize: win->scr_t = %d\n", win->scr_t); 370 __CTRACE(__CTRACE_WINDOW, "resize: win->scr_b = %d\n", win->scr_b); 371 #endif 372 373 if (win->orig == NULL) { 374 /* bound subwindows to new size and fixup their pointers */ 375 for (swin = win->nextp; swin != win; swin = swin->nextp) { 376 y = swin->reqy; 377 if (swin->begy > win->begy + win->maxy) 378 swin->begy = win->begy + win->maxy - 1; 379 if (swin->begy + y > win->begy + win->maxy) 380 y = 0; 381 if (y <= 0) 382 y += win->begy + win->maxy - swin->begy; 383 if (y < 1) 384 y = 1; 385 x = swin->reqx; 386 if (swin->begx > win->begx + win->maxx) 387 swin->begx = win->begx + win->maxx - 1; 388 if (swin->begx + x > win->begx + win->maxx) 389 x = 0; 390 if (x <= 0) 391 x += win->begy + win->maxx - swin->begx; 392 if (x < 1) 393 x = 1; 394 __resizewin(swin, y, x); 395 } 396 } 397 398 return OK; 399 } 400
Indexes created Mon Sep 22 10:09:38 GMT 2025