resize.c revision 1.12.4.1
1 /* $NetBSD: resize.c,v 1.12.4.1 2007/08/28 11:54:49 liamjfoy 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 1.12.4.1 2007/08/28 11:54:49 liamjfoy 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("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("resize: (%p, %d, %d)\n", win, nlines, ncols); 184 __CTRACE("resize: win->wattr = %08x\n", win->wattr); 185 __CTRACE("resize: win->flags = %#.4x\n", win->flags); 186 __CTRACE("resize: win->maxy = %d\n", win->maxy); 187 __CTRACE("resize: win->maxx = %d\n", win->maxx); 188 __CTRACE("resize: win->begy = %d\n", win->begy); 189 __CTRACE("resize: win->begx = %d\n", win->begx); 190 __CTRACE("resize: win->scr_t = %d\n", win->scr_t); 191 __CTRACE("resize: win->scr_b = %d\n", win->scr_b); 192 #endif 193 194 if (nlines <= 0 || ncols <= 0) 195 nlines = ncols = 0; 196 else { 197 /* Reallocate line pointer array and line space. */ 198 newlines = realloc(win->lines, nlines * sizeof(__LINE *)); 199 if (newlines == NULL) 200 return ERR; 201 win->lines = newlines; 202 203 newlspace = realloc(win->lspace, nlines * sizeof(__LINE)); 204 if (newlspace == NULL) 205 return ERR; 206 win->lspace = newlspace; 207 } 208 209 /* Don't allocate window and line space if it's a subwindow */ 210 if (win->orig == NULL) { 211 /* 212 * Allocate window space in one chunk. 213 */ 214 if (ncols != 0) { 215 newwspace = realloc(win->wspace, 216 ncols * nlines * sizeof(__LDATA)); 217 if (newwspace == NULL) 218 return ERR; 219 win->wspace = newwspace; 220 } 221 222 /* 223 * Point line pointers to line space, and lines themselves into 224 * window space. 225 */ 226 for (lp = win->lspace, i = 0; i < nlines; i++, lp++) { 227 win->lines[i] = lp; 228 lp->line = &win->wspace[i * ncols]; 229 #ifdef DEBUG 230 lp->sentinel = SENTINEL_VALUE; 231 #endif 232 lp->firstchp = &lp->firstch; 233 lp->lastchp = &lp->lastch; 234 lp->firstch = 0; 235 lp->lastch = ncols - 1; 236 lp->flags = __ISDIRTY; 237 } 238 } else { 239 240 win->ch_off = win->begx - win->orig->begx; 241 /* Point line pointers to line space. */ 242 for (lp = win->lspace, i = 0; i < nlines; i++, lp++) { 243 win->lines[i] = lp; 244 olp = win->orig->lines[i + win->begy 245 - win->orig->begy]; 246 lp->line = &olp->line[win->ch_off]; 247 #ifdef DEBUG 248 lp->sentinel = SENTINEL_VALUE; 249 #endif 250 lp->firstchp = &olp->firstch; 251 lp->lastchp = &olp->lastch; 252 lp->flags = __ISDIRTY; 253 } 254 } 255 256 257 win->cury = win->curx = 0; 258 win->maxy = nlines; 259 win->maxx = ncols; 260 win->scr_b = win->maxy - 1; 261 __swflags(win); 262 263 /* 264 * we must zot the window contents otherwise lines may pick 265 * up attributes from the previous line when the window is 266 * made smaller. The client will redraw the window anyway 267 * so this is no big deal. 268 */ 269 for (i = 0; i < win->maxy; i++) { 270 lp = win->lines[i]; 271 for (sp = lp->line, j = 0; j < win->maxx; j++, sp++) { 272 sp->ch = ' '; 273 sp->attr = 0; 274 } 275 lp->hash = __hash((char *)(void *)lp->line, 276 (size_t) (ncols * __LDATASIZE)); 277 } 278 279 #ifdef DEBUG 280 __CTRACE("resize: win->wattr = %08x\n", win->wattr); 281 __CTRACE("resize: win->flags = %#.4x\n", win->flags); 282 __CTRACE("resize: win->maxy = %d\n", win->maxy); 283 __CTRACE("resize: win->maxx = %d\n", win->maxx); 284 __CTRACE("resize: win->begy = %d\n", win->begy); 285 __CTRACE("resize: win->begx = %d\n", win->begx); 286 __CTRACE("resize: win->scr_t = %d\n", win->scr_t); 287 __CTRACE("resize: win->scr_b = %d\n", win->scr_b); 288 #endif 289 290 if (win->orig == NULL) { 291 /* bound subwindows to new size and fixup their pointers */ 292 for (swin = win->nextp; swin != win; swin = swin->nextp) { 293 y = swin->reqy; 294 if (swin->begy + y > win->begy + win->maxy) 295 y = 0; 296 if (y <= 0) 297 y += win->begy + win->maxy - swin->begy; 298 x = swin->reqx; 299 if (swin->begx + x > win->begx + win->maxx) 300 x = 0; 301 if (x <= 0) 302 x += win->begy + win->maxx - swin->begx; 303 __resizewin(swin, y, x); 304 } 305 } 306 307 return OK; 308 } 309 310
Indexes created Sun Sep 21 20:09:37 GMT 2025