resize.c revision 1.23
1 /* $NetBSD: resize.c,v 1.23 2017/01/10 10:13:24 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 1.23 2017/01/10 10:13:24 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 + _cursesi_screen->ripped_top + _cursesi_screen->ripped_bottom || 150 ncols != _cursesi_screen->COLS)); 151 } 152 153 /* 154 * resizeterm -- 155 * Resize the terminal window, resizing the dependent windows. 156 * Handles internal book-keeping. 157 */ 158 int 159 resizeterm(int nlines, int ncols) 160 { 161 int result; 162 163 #ifdef DEBUG 164 __CTRACE(__CTRACE_WINDOW, "resizeterm: (%d, %d)\n", nlines, ncols); 165 #endif 166 167 if (!is_term_resized(nlines, ncols)) 168 return OK; 169 170 result = resizeterm(nlines, ncols); 171 clearok(curscr, TRUE); 172 return result; 173 } 174 175 /* 176 * resize_term -- 177 * Resize the terminal window, resizing the dependent windows. 178 */ 179 int 180 resize_term(int nlines, int ncols) 181 { 182 WINDOW *win; 183 struct __winlist *list; 184 185 #ifdef DEBUG 186 __CTRACE(__CTRACE_WINDOW, "resize_term: (%d, %d)\n", nlines, ncols); 187 #endif 188 189 if (!is_term_resized(nlines, ncols)) 190 return OK; 191 192 if (__resizeterm(curscr, nlines, ncols) == ERR) 193 return ERR; 194 if (__resizeterm(__virtscr, nlines, ncols) == ERR) 195 return ERR; 196 nlines -= _cursesi_screen->ripped_top - _cursesi_screen->ripped_bottom; 197 if (__resizeterm(stdscr, nlines, ncols) == ERR) 198 return ERR; 199 200 LINES = nlines; 201 COLS = ncols; 202 203 /* tweak the flags now that we have updated the LINES and COLS */ 204 for (list = _cursesi_screen->winlistp; list != NULL; list = list->nextp) { 205 win = list->winp; 206 207 if (!(win->flags & __ISPAD)) 208 __swflags(win); 209 } 210 211 return OK; 212 } 213 214 /* 215 * __resizeterm 216 * Setup window for resizing. 217 */ 218 static int 219 __resizeterm(WINDOW *win, int nlines, int ncols) 220 { 221 int newlines, newcols; 222 223 newlines = win->reqy; 224 if (win->begy + newlines >= nlines) 225 newlines = 0; 226 if (newlines == 0) 227 newlines = nlines - win->begy; 228 229 newcols = win->reqx; 230 if (win->begx + newcols >= ncols) 231 newcols = 0; 232 if (newcols == 0) 233 newcols = ncols - win->begx; 234 235 return __resizewin(win, newlines, newcols); 236 } 237 238 /* 239 * __resizewin -- 240 * Resize the given window. 241 */ 242 static int 243 __resizewin(WINDOW *win, int nlines, int ncols) 244 { 245 __LINE *lp, *olp, **newlines, *newlspace; 246 __LDATA *sp; 247 __LDATA *newwspace; 248 int i, j; 249 int y, x; 250 WINDOW *swin; 251 252 #ifdef DEBUG 253 __CTRACE(__CTRACE_WINDOW, "resize: (%p, %d, %d)\n", win, nlines, ncols); 254 __CTRACE(__CTRACE_WINDOW, "resize: win->wattr = %08x\n", win->wattr); 255 __CTRACE(__CTRACE_WINDOW, "resize: win->flags = %#.4x\n", win->flags); 256 __CTRACE(__CTRACE_WINDOW, "resize: win->maxy = %d\n", win->maxy); 257 __CTRACE(__CTRACE_WINDOW, "resize: win->maxx = %d\n", win->maxx); 258 __CTRACE(__CTRACE_WINDOW, "resize: win->begy = %d\n", win->begy); 259 __CTRACE(__CTRACE_WINDOW, "resize: win->begx = %d\n", win->begx); 260 __CTRACE(__CTRACE_WINDOW, "resize: win->scr_t = %d\n", win->scr_t); 261 __CTRACE(__CTRACE_WINDOW, "resize: win->scr_b = %d\n", win->scr_b); 262 #endif 263 264 /* 265 * free up any non-spacing storage before we lose the 266 * pointers... 267 */ 268 #ifdef HAVE_WCHAR 269 __cursesi_win_free_nsp(win); 270 #endif 271 272 if (nlines <= 0 || ncols <= 0) 273 nlines = ncols = 0; 274 else { 275 /* Reallocate line pointer array and line space. */ 276 newlines = realloc(win->alines, nlines * sizeof(__LINE *)); 277 if (newlines == NULL) 278 return ERR; 279 win->alines = newlines; 280 281 newlspace = realloc(win->lspace, nlines * sizeof(__LINE)); 282 if (newlspace == NULL) 283 return ERR; 284 win->lspace = newlspace; 285 } 286 287 /* Don't allocate window and line space if it's a subwindow */ 288 if (win->orig == NULL) { 289 /* 290 * Allocate window space in one chunk. 291 */ 292 if (ncols != 0) { 293 newwspace = realloc(win->wspace, 294 ncols * nlines * sizeof(__LDATA)); 295 if (newwspace == NULL) 296 return ERR; 297 win->wspace = newwspace; 298 } 299 300 /* 301 * Point line pointers to line space, and lines themselves into 302 * window space. 303 */ 304 for (lp = win->lspace, i = 0; i < nlines; i++, lp++) { 305 win->alines[i] = lp; 306 lp->line = &win->wspace[i * ncols]; 307 #ifdef DEBUG 308 lp->sentinel = SENTINEL_VALUE; 309 #endif 310 lp->firstchp = &lp->firstch; 311 lp->lastchp = &lp->lastch; 312 lp->firstch = 0; 313 lp->lastch = ncols - 1; 314 lp->flags = __ISDIRTY; 315 } 316 } else { 317 318 win->ch_off = win->begx - win->orig->begx; 319 /* Point line pointers to line space. */ 320 for (lp = win->lspace, i = 0; i < nlines; i++, lp++) { 321 win->alines[i] = lp; 322 olp = win->orig->alines[i + win->begy - win->orig->begy]; 323 lp->line = &olp->line[win->ch_off]; 324 #ifdef DEBUG 325 lp->sentinel = SENTINEL_VALUE; 326 #endif 327 lp->firstchp = &olp->firstch; 328 lp->lastchp = &olp->lastch; 329 lp->flags = __ISDIRTY; 330 } 331 } 332 333 win->cury = win->curx = 0; 334 win->maxy = nlines; 335 win->maxx = ncols; 336 win->scr_b = win->maxy - 1; 337 __swflags(win); 338 339 /* 340 * we must zot the window contents otherwise lines may pick 341 * up attributes from the previous line when the window is 342 * made smaller. The client will redraw the window anyway 343 * so this is no big deal. 344 */ 345 for (i = 0; i < win->maxy; i++) { 346 lp = win->alines[i]; 347 for (sp = lp->line, j = 0; j < win->maxx; j++, sp++) { 348 sp->attr = 0; 349 #ifndef HAVE_WCHAR 350 sp->ch = win->bch; 351 #else 352 sp->ch = (wchar_t)btowc((int)win->bch); 353 sp->nsp = NULL; 354 if (_cursesi_copy_nsp(win->bnsp, sp) == ERR) 355 return ERR; 356 SET_WCOL(*sp, 1); 357 #endif /* HAVE_WCHAR */ 358 } 359 lp->hash = __hash((char *)(void *)lp->line, 360 (size_t)(ncols * __LDATASIZE)); 361 } 362 363 #ifdef DEBUG 364 __CTRACE(__CTRACE_WINDOW, "resize: win->wattr = %08x\n", win->wattr); 365 __CTRACE(__CTRACE_WINDOW, "resize: win->flags = %#.4x\n", win->flags); 366 __CTRACE(__CTRACE_WINDOW, "resize: win->maxy = %d\n", win->maxy); 367 __CTRACE(__CTRACE_WINDOW, "resize: win->maxx = %d\n", win->maxx); 368 __CTRACE(__CTRACE_WINDOW, "resize: win->begy = %d\n", win->begy); 369 __CTRACE(__CTRACE_WINDOW, "resize: win->begx = %d\n", win->begx); 370 __CTRACE(__CTRACE_WINDOW, "resize: win->scr_t = %d\n", win->scr_t); 371 __CTRACE(__CTRACE_WINDOW, "resize: win->scr_b = %d\n", win->scr_b); 372 #endif 373 374 if (win->orig == NULL) { 375 /* bound subwindows to new size and fixup their pointers */ 376 for (swin = win->nextp; swin != win; swin = swin->nextp) { 377 y = swin->reqy; 378 if (swin->begy > win->begy + win->maxy) 379 swin->begy = win->begy + win->maxy - 1; 380 if (swin->begy + y > win->begy + win->maxy) 381 y = 0; 382 if (y <= 0) 383 y += win->begy + win->maxy - swin->begy; 384 if (y < 1) 385 y = 1; 386 x = swin->reqx; 387 if (swin->begx > win->begx + win->maxx) 388 swin->begx = win->begx + win->maxx - 1; 389 if (swin->begx + x > win->begx + win->maxx) 390 x = 0; 391 if (x <= 0) 392 x += win->begy + win->maxx - swin->begx; 393 if (x < 1) 394 x = 1; 395 __resizewin(swin, y, x); 396 } 397 } 398 399 return OK; 400 } 401
Indexes created Sun Sep 21 20:09:37 GMT 2025