1/* $NetBSD: resize.c,v 1.19 2008/04/29 17:46:39 jdc 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 41static char sccsid[] = "@(#)resize.c blymn 2001/08/26"; 42#else 43__RCSID("$NetBSD: resize.c,v 1.19 2008/04/29 17:46:39 jdc Exp $"); 44#endif 45#endif /* not lint */ 46 47#include <stdlib.h> 48 49#include "curses.h" 50#include "curses_private.h" 51 52static int __resizeterm(WINDOW *win, int nlines, int ncols); 53static int __resizewin(WINDOW *win, int nlines, int ncols); 54 55/* 56 * wresize -- 57 * Resize the given window to the new size. 58 */ 59int 60wresize(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 * resizeterm -- 140 * Resize the terminal window, resizing the dependent windows. 141 */ 142int 143resizeterm(int nlines, int ncols) 144{ 145 WINDOW *win; 146 struct __winlist *list; 147 148#ifdef DEBUG 149 __CTRACE(__CTRACE_WINDOW, "resizeterm: (%d, %d)\n", nlines, ncols); 150#endif 151 152 if (__resizeterm(curscr, nlines, ncols) == ERR) 153 return ERR; 154 if (__resizeterm(__virtscr, nlines, ncols) == ERR) 155 return ERR; 156 if (__resizeterm(stdscr, nlines, ncols) == ERR) 157 return ERR; 158 159 LINES = nlines; 160 COLS = ncols; 161 162 /* tweak the flags now that we have updated the LINES and COLS */ 163 for (list = _cursesi_screen->winlistp; list != NULL; list = list->nextp) { 164 win = list->winp; 165 166 if (!(win->flags & __ISPAD)) 167 __swflags(win); 168 } 169 170 wrefresh(curscr); 171 return OK; 172} 173 174/* 175 * __resizeterm 176 * Setup window for resizing. 177 */ 178static int 179__resizeterm(WINDOW *win, int nlines, int ncols) 180{ 181 int newlines, newcols; 182 183 newlines = win->reqy; 184 if (win->begy + newlines >= nlines) 185 newlines = 0; 186 if (newlines == 0) 187 newlines = nlines - win->begy; 188 189 newcols = win->reqx; 190 if (win->begx + newcols >= ncols) 191 newcols = 0; 192 if (newcols == 0) 193 newcols = ncols - win->begx; 194 195 return __resizewin(win, newlines, newcols); 196} 197 198/* 199 * __resizewin -- 200 * Resize the given window. 201 */ 202static int 203__resizewin(WINDOW *win, int nlines, int ncols) 204{ 205 __LINE *lp, *olp, **newlines, *newlspace; 206 __LDATA *sp; 207 __LDATA *newwspace; 208 int i, j; 209 int y, x; 210 WINDOW *swin; 211 212#ifdef DEBUG 213 __CTRACE(__CTRACE_WINDOW, "resize: (%p, %d, %d)\n", win, nlines, ncols); 214 __CTRACE(__CTRACE_WINDOW, "resize: win->wattr = %08x\n", win->wattr); 215 __CTRACE(__CTRACE_WINDOW, "resize: win->flags = %#.4x\n", win->flags); 216 __CTRACE(__CTRACE_WINDOW, "resize: win->maxy = %d\n", win->maxy); 217 __CTRACE(__CTRACE_WINDOW, "resize: win->maxx = %d\n", win->maxx); 218 __CTRACE(__CTRACE_WINDOW, "resize: win->begy = %d\n", win->begy); 219 __CTRACE(__CTRACE_WINDOW, "resize: win->begx = %d\n", win->begx); 220 __CTRACE(__CTRACE_WINDOW, "resize: win->scr_t = %d\n", win->scr_t); 221 __CTRACE(__CTRACE_WINDOW, "resize: win->scr_b = %d\n", win->scr_b); 222#endif 223 224 /* 225 * free up any non-spacing storage before we lose the 226 * pointers... 227 */ 228#ifdef HAVE_WCHAR 229 __cursesi_win_free_nsp(win); 230#endif 231 232 if (nlines <= 0 || ncols <= 0) 233 nlines = ncols = 0; 234 else { 235 /* Reallocate line pointer array and line space. */ 236 newlines = realloc(win->alines, nlines * sizeof(__LINE *)); 237 if (newlines == NULL) 238 return ERR; 239 win->alines = newlines; 240 241 newlspace = realloc(win->lspace, nlines * sizeof(__LINE)); 242 if (newlspace == NULL) 243 return ERR; 244 win->lspace = newlspace; 245 } 246 247 /* Don't allocate window and line space if it's a subwindow */ 248 if (win->orig == NULL) { 249 /* 250 * Allocate window space in one chunk. 251 */ 252 if (ncols != 0) { 253 newwspace = realloc(win->wspace, 254 ncols * nlines * sizeof(__LDATA)); 255 if (newwspace == NULL) 256 return ERR; 257 win->wspace = newwspace; 258 } 259 260 /* 261 * Point line pointers to line space, and lines themselves into 262 * window space. 263 */ 264 for (lp = win->lspace, i = 0; i < nlines; i++, lp++) { 265 win->alines[i] = lp; 266 lp->line = &win->wspace[i * ncols]; 267#ifdef DEBUG 268 lp->sentinel = SENTINEL_VALUE; 269#endif 270 lp->firstchp = &lp->firstch; 271 lp->lastchp = &lp->lastch; 272 lp->firstch = 0; 273 lp->lastch = ncols - 1; 274 lp->flags = __ISDIRTY; 275 } 276 } else { 277 278 win->ch_off = win->begx - win->orig->begx; 279 /* Point line pointers to line space. */ 280 for (lp = win->lspace, i = 0; i < nlines; i++, lp++) { 281 win->alines[i] = lp; 282 olp = win->orig->alines[i + win->begy - win->orig->begy]; 283 lp->line = &olp->line[win->ch_off]; 284#ifdef DEBUG 285 lp->sentinel = SENTINEL_VALUE; 286#endif 287 lp->firstchp = &olp->firstch; 288 lp->lastchp = &olp->lastch; 289 lp->flags = __ISDIRTY; 290 } 291 } 292 293 294 win->cury = win->curx = 0; 295 win->maxy = nlines; 296 win->maxx = ncols; 297 win->scr_b = win->maxy - 1; 298 __swflags(win); 299 300 /* 301 * we must zot the window contents otherwise lines may pick 302 * up attributes from the previous line when the window is 303 * made smaller. The client will redraw the window anyway 304 * so this is no big deal. 305 */ 306 for (i = 0; i < win->maxy; i++) { 307 lp = win->alines[i]; 308 for (sp = lp->line, j = 0; j < win->maxx; j++, sp++) { 309 sp->attr = 0; 310#ifndef HAVE_WCHAR 311 sp->ch = win->bch; 312#else 313 sp->ch = ( wchar_t )btowc(( int ) win->bch ); 314 sp->nsp = NULL; 315 if (_cursesi_copy_nsp(win->bnsp, sp) == ERR) 316 return ERR; 317 SET_WCOL( *sp, 1 ); 318#endif /* HAVE_WCHAR */ 319 } 320 lp->hash = __hash((char *)(void *)lp->line, 321 (size_t) (ncols * __LDATASIZE)); 322 } 323 324#ifdef DEBUG 325 __CTRACE(__CTRACE_WINDOW, "resize: win->wattr = %08x\n", win->wattr); 326 __CTRACE(__CTRACE_WINDOW, "resize: win->flags = %#.4x\n", win->flags); 327 __CTRACE(__CTRACE_WINDOW, "resize: win->maxy = %d\n", win->maxy); 328 __CTRACE(__CTRACE_WINDOW, "resize: win->maxx = %d\n", win->maxx); 329 __CTRACE(__CTRACE_WINDOW, "resize: win->begy = %d\n", win->begy); 330 __CTRACE(__CTRACE_WINDOW, "resize: win->begx = %d\n", win->begx); 331 __CTRACE(__CTRACE_WINDOW, "resize: win->scr_t = %d\n", win->scr_t); 332 __CTRACE(__CTRACE_WINDOW, "resize: win->scr_b = %d\n", win->scr_b); 333#endif 334 335 if (win->orig == NULL) { 336 /* bound subwindows to new size and fixup their pointers */ 337 for (swin = win->nextp; swin != win; swin = swin->nextp) { 338 y = swin->reqy; 339 if (swin->begy > win->begy + win->maxy) 340 swin->begy = win->begy + win->maxy - 1; 341 if (swin->begy + y > win->begy + win->maxy) 342 y = 0; 343 if (y <= 0) 344 y += win->begy + win->maxy - swin->begy; 345 if (y < 1) 346 y = 1; 347 x = swin->reqx; 348 if (swin->begx > win->begx + win->maxx) 349 swin->begx = win->begx + win->maxx - 1; 350 if (swin->begx + x > win->begx + win->maxx) 351 x = 0; 352 if (x <= 0) 353 x += win->begy + win->maxx - swin->begx; 354 if (x < 1) 355 x = 1; 356 __resizewin(swin, y, x); 357 } 358 } 359 360 return OK; 361} 362