resize.c revision 1.14.4.2
1 /* $NetBSD: resize.c,v 1.14.4.2 2008/01/09 01:36:24 matt 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 1.14.4.2 2008/01/09 01:36:24 matt 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 nlines = req_nlines; 73 ncols = req_ncols; 74 if (win->orig == NULL) { 75 /* bound "our" windows by the screen size */ 76 if (win == curscr || win == __virtscr || win == stdscr) { 77 if (nlines > LINES) 78 nlines = LINES; 79 if (nlines < 1) 80 nlines = 1; 81 if (ncols > COLS) 82 ncols = COLS; 83 if (ncols < 1) 84 ncols = 1; 85 } else { 86 if (win->begy > LINES) 87 win->begy = 0; 88 if (win->begy + nlines > LINES) 89 nlines = 0; 90 if (nlines <= 0) 91 nlines += LINES - win->begy; 92 if (nlines < 1) 93 nlines = 1; 94 if (win->begx > COLS) 95 win->begx = 0; 96 if (win->begx + ncols > COLS) 97 ncols = 0; 98 if (ncols <= 0) 99 ncols += COLS - win->begx; 100 if (ncols < 1) 101 ncols = 1; 102 } 103 } else { 104 /* subwins must fit inside the parent - check this */ 105 if (win->begy > win->orig->begy + win->orig->maxy) 106 win->begy = win->orig->begy + win->orig->maxy - 1; 107 if (win->begy + nlines > win->orig->begy + win->orig->maxy) 108 nlines = 0; 109 if (nlines <= 0) 110 nlines += win->orig->begy + win->orig->maxy - win->begy; 111 if (nlines < 1) 112 nlines = 1; 113 if (win->begx > win->orig->begx + win->orig->maxx) 114 win->begx = win->orig->begx + win->orig->maxx - 1; 115 if (win->begx + ncols > win->orig->begx + win->orig->maxx) 116 ncols = 0; 117 if (ncols <= 0) 118 ncols += win->orig->begx + win->orig->maxx - win->begx; 119 if (ncols < 1) 120 ncols = 1; 121 } 122 123 if ((__resizewin(win, nlines, ncols)) == ERR) 124 return ERR; 125 126 win->reqy = req_nlines; 127 win->reqx = req_ncols; 128 129 /* If someone resizes curscr, we must also resize __virtscr */ 130 if (win == curscr) { 131 if ((__resizewin(__virtscr, nlines, ncols)) == ERR) 132 return ERR; 133 __virtscr->reqy = req_nlines; 134 __virtscr->reqx = req_ncols; 135 } 136 137 return OK; 138 } 139 140 /* 141 * resizeterm -- 142 * Resize the terminal window, resizing the dependent windows. 143 */ 144 int 145 resizeterm(int nlines, int ncols) 146 { 147 WINDOW *win; 148 struct __winlist *list; 149 150 /* don't worry if things have not changed... we would like to 151 do this but some bastard programs update LINES and COLS before 152 calling resizeterm thus negating it's effect. 153 if ((nlines == LINES) && (ncols == COLS)) 154 return OK;*/ 155 156 #ifdef DEBUG 157 __CTRACE(__CTRACE_WINDOW, "resizeterm: (%d, %d)\n", nlines, ncols); 158 #endif 159 160 if (__resizeterm(curscr, nlines, ncols) == ERR) 161 return ERR; 162 if (__resizeterm(__virtscr, nlines, ncols) == ERR) 163 return ERR; 164 if (__resizeterm(stdscr, nlines, ncols) == ERR) 165 return ERR; 166 167 LINES = nlines; 168 COLS = ncols; 169 170 /* tweak the flags now that we have updated the LINES and COLS */ 171 for (list = _cursesi_screen->winlistp; list != NULL; list = list->nextp) { 172 win = list->winp; 173 174 if (!(win->flags & __ISPAD)) 175 __swflags(win); 176 } 177 178 wrefresh(curscr); 179 return OK; 180 } 181 182 /* 183 * __resizeterm 184 * Setup window for resizing. 185 */ 186 static int 187 __resizeterm(WINDOW *win, int nlines, int ncols) 188 { 189 int newlines, newcols; 190 191 newlines = win->reqy; 192 if (win->begy + newlines >= nlines) 193 newlines = 0; 194 if (newlines == 0) 195 newlines = nlines - win->begy; 196 197 newcols = win->reqx; 198 if (win->begx + newcols >= ncols) 199 newcols = 0; 200 if (newcols == 0) 201 newcols = ncols - win->begx; 202 203 return __resizewin(win, newlines, newcols); 204 } 205 206 /* 207 * __resizewin -- 208 * Resize the given window. 209 */ 210 static int 211 __resizewin(WINDOW *win, int nlines, int ncols) 212 { 213 __LINE *lp, *olp, **newlines, *newlspace; 214 __LDATA *sp; 215 __LDATA *newwspace; 216 int i, j; 217 int y, x; 218 WINDOW *swin; 219 220 #ifdef DEBUG 221 __CTRACE(__CTRACE_WINDOW, "resize: (%p, %d, %d)\n", win, nlines, ncols); 222 __CTRACE(__CTRACE_WINDOW, "resize: win->wattr = %08x\n", win->wattr); 223 __CTRACE(__CTRACE_WINDOW, "resize: win->flags = %#.4x\n", win->flags); 224 __CTRACE(__CTRACE_WINDOW, "resize: win->maxy = %d\n", win->maxy); 225 __CTRACE(__CTRACE_WINDOW, "resize: win->maxx = %d\n", win->maxx); 226 __CTRACE(__CTRACE_WINDOW, "resize: win->begy = %d\n", win->begy); 227 __CTRACE(__CTRACE_WINDOW, "resize: win->begx = %d\n", win->begx); 228 __CTRACE(__CTRACE_WINDOW, "resize: win->scr_t = %d\n", win->scr_t); 229 __CTRACE(__CTRACE_WINDOW, "resize: win->scr_b = %d\n", win->scr_b); 230 #endif 231 232 /* 233 * free up any non-spacing storage before we lose the 234 * pointers... 235 */ 236 #ifdef HAVE_WCHAR 237 __cursesi_win_free_nsp(win); 238 #endif 239 240 if (nlines <= 0 || ncols <= 0) 241 nlines = ncols = 0; 242 else { 243 /* Reallocate line pointer array and line space. */ 244 newlines = realloc(win->lines, nlines * sizeof(__LINE *)); 245 if (newlines == NULL) 246 return ERR; 247 win->lines = newlines; 248 249 newlspace = realloc(win->lspace, nlines * sizeof(__LINE)); 250 if (newlspace == NULL) 251 return ERR; 252 win->lspace = newlspace; 253 } 254 255 /* Don't allocate window and line space if it's a subwindow */ 256 if (win->orig == NULL) { 257 /* 258 * Allocate window space in one chunk. 259 */ 260 if (ncols != 0) { 261 newwspace = realloc(win->wspace, 262 ncols * nlines * sizeof(__LDATA)); 263 if (newwspace == NULL) 264 return ERR; 265 win->wspace = newwspace; 266 } 267 268 /* 269 * Point line pointers to line space, and lines themselves into 270 * window space. 271 */ 272 for (lp = win->lspace, i = 0; i < nlines; i++, lp++) { 273 win->lines[i] = lp; 274 lp->line = &win->wspace[i * ncols]; 275 #ifdef DEBUG 276 lp->sentinel = SENTINEL_VALUE; 277 #endif 278 lp->firstchp = &lp->firstch; 279 lp->lastchp = &lp->lastch; 280 lp->firstch = 0; 281 lp->lastch = ncols - 1; 282 lp->flags = __ISDIRTY; 283 } 284 } else { 285 286 win->ch_off = win->begx - win->orig->begx; 287 /* Point line pointers to line space. */ 288 for (lp = win->lspace, i = 0; i < nlines; i++, lp++) { 289 win->lines[i] = lp; 290 olp = win->orig->lines[i + win->begy - win->orig->begy]; 291 lp->line = &olp->line[win->ch_off]; 292 #ifdef DEBUG 293 lp->sentinel = SENTINEL_VALUE; 294 #endif 295 lp->firstchp = &olp->firstch; 296 lp->lastchp = &olp->lastch; 297 lp->flags = __ISDIRTY; 298 } 299 } 300 301 302 win->cury = win->curx = 0; 303 win->maxy = nlines; 304 win->maxx = ncols; 305 win->scr_b = win->maxy - 1; 306 __swflags(win); 307 308 /* 309 * we must zot the window contents otherwise lines may pick 310 * up attributes from the previous line when the window is 311 * made smaller. The client will redraw the window anyway 312 * so this is no big deal. 313 */ 314 for (i = 0; i < win->maxy; i++) { 315 lp = win->lines[i]; 316 for (sp = lp->line, j = 0; j < win->maxx; j++, sp++) { 317 sp->attr = 0; 318 #ifndef HAVE_WCHAR 319 sp->ch = win->bch; 320 #else 321 sp->ch = ( wchar_t )btowc(( int ) win->bch ); 322 sp->nsp = NULL; 323 if (_cursesi_copy_nsp(win->bnsp, sp) == ERR) 324 return ERR; 325 SET_WCOL( *sp, 1 ); 326 #endif /* HAVE_WCHAR */ 327 } 328 lp->hash = __hash((char *)(void *)lp->line, 329 (size_t) (ncols * __LDATASIZE)); 330 } 331 332 #ifdef DEBUG 333 __CTRACE(__CTRACE_WINDOW, "resize: win->wattr = %08x\n", win->wattr); 334 __CTRACE(__CTRACE_WINDOW, "resize: win->flags = %#.4x\n", win->flags); 335 __CTRACE(__CTRACE_WINDOW, "resize: win->maxy = %d\n", win->maxy); 336 __CTRACE(__CTRACE_WINDOW, "resize: win->maxx = %d\n", win->maxx); 337 __CTRACE(__CTRACE_WINDOW, "resize: win->begy = %d\n", win->begy); 338 __CTRACE(__CTRACE_WINDOW, "resize: win->begx = %d\n", win->begx); 339 __CTRACE(__CTRACE_WINDOW, "resize: win->scr_t = %d\n", win->scr_t); 340 __CTRACE(__CTRACE_WINDOW, "resize: win->scr_b = %d\n", win->scr_b); 341 #endif 342 343 if (win->orig == NULL) { 344 /* bound subwindows to new size and fixup their pointers */ 345 for (swin = win->nextp; swin != win; swin = swin->nextp) { 346 y = swin->reqy; 347 if (swin->begy > win->begy + win->maxy) 348 swin->begy = win->begy + win->maxy - 1; 349 if (swin->begy + y > win->begy + win->maxy) 350 y = 0; 351 if (y <= 0) 352 y += win->begy + win->maxy - swin->begy; 353 if (y < 1) 354 y = 1; 355 x = swin->reqx; 356 if (swin->begx > win->begx + win->maxx) 357 swin->begx = win->begx + win->maxx - 1; 358 if (swin->begx + x > win->begx + win->maxx) 359 x = 0; 360 if (x <= 0) 361 x += win->begy + win->maxx - swin->begx; 362 if (x < 1) 363 x = 1; 364 __resizewin(swin, y, x); 365 } 366 } 367 368 return OK; 369 } 370
Indexes created Sun Sep 21 20:09:37 GMT 2025