resize.c revision 1.15
1 /* $NetBSD: resize.c,v 1.15 2007/08/27 19:54:29 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 41 static char sccsid[] = "@(#)resize.c blymn 2001/08/26"; 42 #else 43 __RCSID("$NetBSD: resize.c,v 1.15 2007/08/27 19:54:29 jdc 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 __resizewin(WINDOW *win, int nlines, int ncols); 53 54 /* 55 * wresize -- 56 * Resize the given window to the new size. 57 */ 58 int 59 wresize(WINDOW *win, int req_nlines, int req_ncols) 60 { 61 int nlines = req_nlines; 62 int ncols = req_ncols; 63 64 if (win == NULL) 65 return ERR; 66 67 #ifdef DEBUG 68 __CTRACE(__CTRACE_WINDOW, "wresize: (%p, %d, %d)\n", 69 win, nlines, ncols); 70 #endif 71 nlines = req_nlines; 72 ncols = req_ncols; 73 if (win->orig == NULL) { 74 /* bound window to screen */ 75 if (win->begy + nlines > LINES) 76 nlines = 0; 77 if (nlines <= 0) 78 nlines += LINES - win->begy; 79 if (win->begx + ncols > COLS) 80 ncols = 0; 81 if (ncols <= 0) 82 ncols += COLS - win->begx; 83 } else { 84 /* subwins must fit inside the parent - check this */ 85 if (win->begy + nlines > win->orig->begy + win->orig->maxy) 86 nlines = 0; 87 if (nlines <= 0) 88 nlines += win->orig->begy + win->orig->maxy - win->begy; 89 if (win->begx + ncols > win->orig->begx + win->orig->maxx) 90 ncols = 0; 91 if (ncols <= 0) 92 ncols += win->orig->begx + win->orig->maxx - win->begx; 93 } 94 95 if ((__resizewin(win, nlines, ncols)) == ERR) 96 return ERR; 97 98 win->reqy = req_nlines; 99 win->reqx = req_ncols; 100 101 /* If someone resizes curscr, we must also resize __virtscr */ 102 if (win == curscr) { 103 if ((__resizewin(__virtscr, nlines, ncols)) == ERR) 104 return ERR; 105 __virtscr->reqy = req_nlines; 106 __virtscr->reqx = req_ncols; 107 } 108 109 return OK; 110 } 111 112 /* 113 * resizeterm -- 114 * Resize the terminal window, resizing the dependent windows. 115 */ 116 int 117 resizeterm(int nlines, int ncols) 118 { 119 WINDOW *win; 120 struct __winlist *list; 121 int newlines, newcols; 122 123 /* don't worry if things have not changed... we would like to 124 do this but some bastard programs update LINES and COLS before 125 calling resizeterm thus negating it's effect. 126 if ((nlines == LINES) && (ncols == COLS)) 127 return OK;*/ 128 129 #ifdef DEBUG 130 __CTRACE(__CTRACE_WINDOW, "resizeterm: (%d, %d)\n", nlines, ncols); 131 #endif 132 133 134 for (list = _cursesi_screen->winlistp; list != NULL; list = list->nextp) { 135 win = list->winp; 136 137 newlines = win->reqy; 138 if (win->begy + newlines >= nlines) 139 newlines = 0; 140 if (newlines == 0) 141 newlines = nlines - win->begy; 142 143 newcols = win->reqx; 144 if (win->begx + newcols >= ncols) 145 newcols = 0; 146 if (newcols == 0) 147 newcols = ncols - win->begx; 148 149 if (__resizewin(win, newlines, newcols) != OK) 150 return ERR; 151 } 152 153 LINES = nlines; 154 COLS = ncols; 155 156 /* tweak the flags now that we have updated the LINES and COLS */ 157 for (list = _cursesi_screen->winlistp; list != NULL; list = list->nextp) { 158 win = list->winp; 159 160 if (!(win->flags & __ISPAD)) 161 __swflags(win); 162 } 163 164 wrefresh(curscr); 165 return OK; 166 } 167 168 /* 169 * __resizewin -- 170 * Resize the given window. 171 */ 172 static int 173 __resizewin(WINDOW *win, int nlines, int ncols) 174 { 175 __LINE *lp, *olp, **newlines, *newlspace; 176 __LDATA *sp; 177 __LDATA *newwspace; 178 int i, j; 179 int y, x; 180 WINDOW *swin; 181 182 #ifdef DEBUG 183 __CTRACE(__CTRACE_WINDOW, "resize: (%p, %d, %d)\n", win, nlines, ncols); 184 __CTRACE(__CTRACE_WINDOW, "resize: win->wattr = %08x\n", win->wattr); 185 __CTRACE(__CTRACE_WINDOW, "resize: win->flags = %#.4x\n", win->flags); 186 __CTRACE(__CTRACE_WINDOW, "resize: win->maxy = %d\n", win->maxy); 187 __CTRACE(__CTRACE_WINDOW, "resize: win->maxx = %d\n", win->maxx); 188 __CTRACE(__CTRACE_WINDOW, "resize: win->begy = %d\n", win->begy); 189 __CTRACE(__CTRACE_WINDOW, "resize: win->begx = %d\n", win->begx); 190 __CTRACE(__CTRACE_WINDOW, "resize: win->scr_t = %d\n", win->scr_t); 191 __CTRACE(__CTRACE_WINDOW, "resize: win->scr_b = %d\n", win->scr_b); 192 #endif 193 194 /* 195 * free up any non-spacing storage before we lose the 196 * pointers... 197 */ 198 #ifdef HAVE_WCHAR 199 __cursesi_win_free_nsp(win); 200 #endif 201 202 if (nlines <= 0 || ncols <= 0) 203 nlines = ncols = 0; 204 else { 205 /* Reallocate line pointer array and line space. */ 206 newlines = realloc(win->lines, nlines * sizeof(__LINE *)); 207 if (newlines == NULL) 208 return ERR; 209 win->lines = newlines; 210 211 newlspace = realloc(win->lspace, nlines * sizeof(__LINE)); 212 if (newlspace == NULL) 213 return ERR; 214 win->lspace = newlspace; 215 } 216 217 /* Don't allocate window and line space if it's a subwindow */ 218 if (win->orig == NULL) { 219 /* 220 * Allocate window space in one chunk. 221 */ 222 if (ncols != 0) { 223 newwspace = realloc(win->wspace, 224 ncols * nlines * sizeof(__LDATA)); 225 if (newwspace == NULL) 226 return ERR; 227 win->wspace = newwspace; 228 } 229 230 /* 231 * Point line pointers to line space, and lines themselves into 232 * window space. 233 */ 234 for (lp = win->lspace, i = 0; i < nlines; i++, lp++) { 235 win->lines[i] = lp; 236 lp->line = &win->wspace[i * ncols]; 237 #ifdef DEBUG 238 lp->sentinel = SENTINEL_VALUE; 239 #endif 240 lp->firstchp = &lp->firstch; 241 lp->lastchp = &lp->lastch; 242 lp->firstch = 0; 243 lp->lastch = ncols - 1; 244 lp->flags = __ISDIRTY; 245 } 246 } else { 247 248 win->ch_off = win->begx - win->orig->begx; 249 /* Point line pointers to line space. */ 250 for (lp = win->lspace, i = 0; i < nlines; i++, lp++) { 251 win->lines[i] = lp; 252 olp = win->orig->lines[i + win->begy - win->orig->begy]; 253 lp->line = &olp->line[win->ch_off]; 254 #ifdef DEBUG 255 lp->sentinel = SENTINEL_VALUE; 256 #endif 257 lp->firstchp = &olp->firstch; 258 lp->lastchp = &olp->lastch; 259 lp->flags = __ISDIRTY; 260 } 261 } 262 263 264 win->cury = win->curx = 0; 265 win->maxy = nlines; 266 win->maxx = ncols; 267 win->scr_b = win->maxy - 1; 268 __swflags(win); 269 270 /* 271 * we must zot the window contents otherwise lines may pick 272 * up attributes from the previous line when the window is 273 * made smaller. The client will redraw the window anyway 274 * so this is no big deal. 275 */ 276 for (i = 0; i < win->maxy; i++) { 277 lp = win->lines[i]; 278 for (sp = lp->line, j = 0; j < win->maxx; j++, sp++) { 279 sp->attr = 0; 280 #ifndef HAVE_WCHAR 281 sp->ch = win->bch; 282 #else 283 sp->ch = ( wchar_t )btowc(( int ) win->bch ); 284 sp->nsp = NULL; 285 if (_cursesi_copy_nsp(win->bnsp, sp) == ERR) 286 return ERR; 287 SET_WCOL( *sp, 1 ); 288 #endif /* HAVE_WCHAR */ 289 } 290 lp->hash = __hash((char *)(void *)lp->line, 291 (size_t) (ncols * __LDATASIZE)); 292 } 293 294 #ifdef DEBUG 295 __CTRACE(__CTRACE_WINDOW, "resize: win->wattr = %08x\n", win->wattr); 296 __CTRACE(__CTRACE_WINDOW, "resize: win->flags = %#.4x\n", win->flags); 297 __CTRACE(__CTRACE_WINDOW, "resize: win->maxy = %d\n", win->maxy); 298 __CTRACE(__CTRACE_WINDOW, "resize: win->maxx = %d\n", win->maxx); 299 __CTRACE(__CTRACE_WINDOW, "resize: win->begy = %d\n", win->begy); 300 __CTRACE(__CTRACE_WINDOW, "resize: win->begx = %d\n", win->begx); 301 __CTRACE(__CTRACE_WINDOW, "resize: win->scr_t = %d\n", win->scr_t); 302 __CTRACE(__CTRACE_WINDOW, "resize: win->scr_b = %d\n", win->scr_b); 303 #endif 304 305 if (win->orig == NULL) { 306 /* bound subwindows to new size and fixup their pointers */ 307 for (swin = win->nextp; swin != win; swin = swin->nextp) { 308 y = swin->reqy; 309 if (swin->begy + y > win->begy + win->maxy) 310 y = 0; 311 if (y <= 0) 312 y += win->begy + win->maxy - swin->begy; 313 x = swin->reqx; 314 if (swin->begx + x > win->begx + win->maxx) 315 x = 0; 316 if (x <= 0) 317 x += win->begy + win->maxx - swin->begx; 318 __resizewin(swin, y, x); 319 } 320 } 321 322 return OK; 323 } 324
Indexes created Mon Sep 22 05:09:51 GMT 2025