resize.c revision 1.21
1 /* $NetBSD: resize.c,v 1.21 2017/01/05 21:25:18 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 1.21 2017/01/05 21:25:18 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 && (nlines != LINES || ncols != COLS)); 148 } 149 150 /* 151 * resizeterm -- 152 * Resize the terminal window, resizing the dependent windows. 153 * Handles internal book-keeping. 154 */ 155 int 156 resizeterm(int nlines, int ncols) 157 { 158 int result; 159 160 #ifdef DEBUG 161 __CTRACE(__CTRACE_WINDOW, "resizeterm: (%d, %d)\n", nlines, ncols); 162 #endif 163 164 if (!is_term_resized(nlines, ncols)) 165 return OK; 166 167 result = resizeterm(nlines, ncols); 168 clearok(curscr, TRUE); 169 return result; 170 } 171 172 /* 173 * resize_term -- 174 * Resize the terminal window, resizing the dependent windows. 175 */ 176 int 177 resize_term(int nlines, int ncols) 178 { 179 WINDOW *win; 180 struct __winlist *list; 181 182 #ifdef DEBUG 183 __CTRACE(__CTRACE_WINDOW, "resize_term: (%d, %d)\n", nlines, ncols); 184 #endif 185 186 if (!is_term_resized(nlines, ncols)) 187 return OK; 188 189 if (__resizeterm(curscr, nlines, ncols) == ERR) 190 return ERR; 191 if (__resizeterm(__virtscr, nlines, ncols) == ERR) 192 return ERR; 193 if (__resizeterm(stdscr, nlines, ncols) == ERR) 194 return ERR; 195 196 LINES = nlines; 197 COLS = ncols; 198 199 /* tweak the flags now that we have updated the LINES and COLS */ 200 for (list = _cursesi_screen->winlistp; list != NULL; list = list->nextp) { 201 win = list->winp; 202 203 if (!(win->flags & __ISPAD)) 204 __swflags(win); 205 } 206 207 return OK; 208 } 209 210 /* 211 * __resizeterm 212 * Setup window for resizing. 213 */ 214 static int 215 __resizeterm(WINDOW *win, int nlines, int ncols) 216 { 217 int newlines, newcols; 218 219 newlines = win->reqy; 220 if (win->begy + newlines >= nlines) 221 newlines = 0; 222 if (newlines == 0) 223 newlines = nlines - win->begy; 224 225 newcols = win->reqx; 226 if (win->begx + newcols >= ncols) 227 newcols = 0; 228 if (newcols == 0) 229 newcols = ncols - win->begx; 230 231 return __resizewin(win, newlines, newcols); 232 } 233 234 /* 235 * __resizewin -- 236 * Resize the given window. 237 */ 238 static int 239 __resizewin(WINDOW *win, int nlines, int ncols) 240 { 241 __LINE *lp, *olp, **newlines, *newlspace; 242 __LDATA *sp; 243 __LDATA *newwspace; 244 int i, j; 245 int y, x; 246 WINDOW *swin; 247 248 #ifdef DEBUG 249 __CTRACE(__CTRACE_WINDOW, "resize: (%p, %d, %d)\n", win, nlines, ncols); 250 __CTRACE(__CTRACE_WINDOW, "resize: win->wattr = %08x\n", win->wattr); 251 __CTRACE(__CTRACE_WINDOW, "resize: win->flags = %#.4x\n", win->flags); 252 __CTRACE(__CTRACE_WINDOW, "resize: win->maxy = %d\n", win->maxy); 253 __CTRACE(__CTRACE_WINDOW, "resize: win->maxx = %d\n", win->maxx); 254 __CTRACE(__CTRACE_WINDOW, "resize: win->begy = %d\n", win->begy); 255 __CTRACE(__CTRACE_WINDOW, "resize: win->begx = %d\n", win->begx); 256 __CTRACE(__CTRACE_WINDOW, "resize: win->scr_t = %d\n", win->scr_t); 257 __CTRACE(__CTRACE_WINDOW, "resize: win->scr_b = %d\n", win->scr_b); 258 #endif 259 260 /* 261 * free up any non-spacing storage before we lose the 262 * pointers... 263 */ 264 #ifdef HAVE_WCHAR 265 __cursesi_win_free_nsp(win); 266 #endif 267 268 if (nlines <= 0 || ncols <= 0) 269 nlines = ncols = 0; 270 else { 271 /* Reallocate line pointer array and line space. */ 272 newlines = realloc(win->alines, nlines * sizeof(__LINE *)); 273 if (newlines == NULL) 274 return ERR; 275 win->alines = newlines; 276 277 newlspace = realloc(win->lspace, nlines * sizeof(__LINE)); 278 if (newlspace == NULL) 279 return ERR; 280 win->lspace = newlspace; 281 } 282 283 /* Don't allocate window and line space if it's a subwindow */ 284 if (win->orig == NULL) { 285 /* 286 * Allocate window space in one chunk. 287 */ 288 if (ncols != 0) { 289 newwspace = realloc(win->wspace, 290 ncols * nlines * sizeof(__LDATA)); 291 if (newwspace == NULL) 292 return ERR; 293 win->wspace = newwspace; 294 } 295 296 /* 297 * Point line pointers to line space, and lines themselves into 298 * window space. 299 */ 300 for (lp = win->lspace, i = 0; i < nlines; i++, lp++) { 301 win->alines[i] = lp; 302 lp->line = &win->wspace[i * ncols]; 303 #ifdef DEBUG 304 lp->sentinel = SENTINEL_VALUE; 305 #endif 306 lp->firstchp = &lp->firstch; 307 lp->lastchp = &lp->lastch; 308 lp->firstch = 0; 309 lp->lastch = ncols - 1; 310 lp->flags = __ISDIRTY; 311 } 312 } else { 313 314 win->ch_off = win->begx - win->orig->begx; 315 /* Point line pointers to line space. */ 316 for (lp = win->lspace, i = 0; i < nlines; i++, lp++) { 317 win->alines[i] = lp; 318 olp = win->orig->alines[i + win->begy - win->orig->begy]; 319 lp->line = &olp->line[win->ch_off]; 320 #ifdef DEBUG 321 lp->sentinel = SENTINEL_VALUE; 322 #endif 323 lp->firstchp = &olp->firstch; 324 lp->lastchp = &olp->lastch; 325 lp->flags = __ISDIRTY; 326 } 327 } 328 329 330 win->cury = win->curx = 0; 331 win->maxy = nlines; 332 win->maxx = ncols; 333 win->scr_b = win->maxy - 1; 334 __swflags(win); 335 336 /* 337 * we must zot the window contents otherwise lines may pick 338 * up attributes from the previous line when the window is 339 * made smaller. The client will redraw the window anyway 340 * so this is no big deal. 341 */ 342 for (i = 0; i < win->maxy; i++) { 343 lp = win->alines[i]; 344 for (sp = lp->line, j = 0; j < win->maxx; j++, sp++) { 345 sp->attr = 0; 346 #ifndef HAVE_WCHAR 347 sp->ch = win->bch; 348 #else 349 sp->ch = ( wchar_t )btowc(( int ) win->bch ); 350 sp->nsp = NULL; 351 if (_cursesi_copy_nsp(win->bnsp, sp) == ERR) 352 return ERR; 353 SET_WCOL( *sp, 1 ); 354 #endif /* HAVE_WCHAR */ 355 } 356 lp->hash = __hash((char *)(void *)lp->line, 357 (size_t) (ncols * __LDATASIZE)); 358 } 359 360 #ifdef DEBUG 361 __CTRACE(__CTRACE_WINDOW, "resize: win->wattr = %08x\n", win->wattr); 362 __CTRACE(__CTRACE_WINDOW, "resize: win->flags = %#.4x\n", win->flags); 363 __CTRACE(__CTRACE_WINDOW, "resize: win->maxy = %d\n", win->maxy); 364 __CTRACE(__CTRACE_WINDOW, "resize: win->maxx = %d\n", win->maxx); 365 __CTRACE(__CTRACE_WINDOW, "resize: win->begy = %d\n", win->begy); 366 __CTRACE(__CTRACE_WINDOW, "resize: win->begx = %d\n", win->begx); 367 __CTRACE(__CTRACE_WINDOW, "resize: win->scr_t = %d\n", win->scr_t); 368 __CTRACE(__CTRACE_WINDOW, "resize: win->scr_b = %d\n", win->scr_b); 369 #endif 370 371 if (win->orig == NULL) { 372 /* bound subwindows to new size and fixup their pointers */ 373 for (swin = win->nextp; swin != win; swin = swin->nextp) { 374 y = swin->reqy; 375 if (swin->begy > win->begy + win->maxy) 376 swin->begy = win->begy + win->maxy - 1; 377 if (swin->begy + y > win->begy + win->maxy) 378 y = 0; 379 if (y <= 0) 380 y += win->begy + win->maxy - swin->begy; 381 if (y < 1) 382 y = 1; 383 x = swin->reqx; 384 if (swin->begx > win->begx + win->maxx) 385 swin->begx = win->begx + win->maxx - 1; 386 if (swin->begx + x > win->begx + win->maxx) 387 x = 0; 388 if (x <= 0) 389 x += win->begy + win->maxx - swin->begx; 390 if (x < 1) 391 x = 1; 392 __resizewin(swin, y, x); 393 } 394 } 395 396 return OK; 397 } 398
Indexes created Mon Sep 22 05:09:51 GMT 2025