resize.c revision 1.10
1 /* $NetBSD: resize.c,v 1.10 2004/03/16 07:49:01 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 1.10 2004/03/16 07:49:01 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 nlines = req_nlines; 68 ncols = req_ncols; 69 if (win->orig == NULL) { 70 /* bound window to screen */ 71 if (win->begy + nlines > LINES) 72 nlines = 0; 73 if (nlines <= 0) 74 nlines += LINES - win->begy; 75 if (win->begx + ncols > COLS) 76 ncols = 0; 77 if (ncols <= 0) 78 ncols += COLS - win->begx; 79 } else { 80 /* subwins must fit inside the parent - check this */ 81 if (win->begy + nlines > win->orig->begy + win->orig->maxy) 82 nlines = 0; 83 if (nlines <= 0) 84 nlines += win->orig->begy + win->orig->maxy - win->begy; 85 if (win->begx + ncols > win->orig->begx + win->orig->maxx) 86 ncols = 0; 87 if (ncols <= 0) 88 ncols += win->orig->begx + win->orig->maxx - win->begx; 89 } 90 91 if ((__resizewin(win, nlines, ncols)) == ERR) 92 return ERR; 93 94 win->reqy = req_nlines; 95 win->reqx = req_ncols; 96 97 return OK; 98 } 99 100 /* 101 * resizeterm -- 102 * Resize the terminal window, resizing the dependent windows. 103 */ 104 int 105 resizeterm(int nlines, int ncols) 106 { 107 WINDOW *win = NULL; /* XXX gcc -Wuninitialized */ 108 struct __winlist *list; 109 int newlines, newcols; 110 111 /* don't worry if things have not changed... we would like to 112 do this but some bastard programs update LINES and COLS before 113 calling resizeterm thus negating it's effect. 114 if ((nlines == LINES) && (ncols == COLS)) 115 return OK;*/ 116 117 #ifdef DEBUG 118 __CTRACE("resizeterm: (%d, %d)\n", nlines, ncols); 119 #endif 120 121 122 for (list = _cursesi_screen->winlistp; list != NULL; list = list->nextp) { 123 win = list->winp; 124 125 newlines = win->reqy; 126 if (win->begy + newlines >= nlines) 127 newlines = 0; 128 if (newlines == 0) 129 newlines = nlines - win->begy; 130 131 newcols = win->reqx; 132 if (win->begx + newcols >= ncols) 133 newcols = 0; 134 if (newcols == 0) 135 newcols = ncols - win->begx; 136 137 if (__resizewin(win, newlines, newcols) != OK) 138 return ERR; 139 } 140 141 LINES = nlines; 142 COLS = ncols; 143 144 /* tweak the flags now that we have updated the LINES and COLS */ 145 for (list = _cursesi_screen->winlistp; list != NULL; list = list->nextp) { 146 if (!(win->flags & __ISPAD)) 147 __swflags(list->winp); 148 } 149 150 wrefresh(curscr); 151 return OK; 152 } 153 154 /* 155 * __resizewin -- 156 * Resize the given window. 157 */ 158 static int 159 __resizewin(WINDOW *win, int nlines, int ncols) 160 { 161 __LINE *lp, *olp, **newlines, *newlspace; 162 __LDATA *sp; 163 __LDATA *newwspace; 164 int i, j; 165 int y, x; 166 WINDOW *swin; 167 168 #ifdef DEBUG 169 __CTRACE("resize: (%p, %d, %d)\n", win, nlines, ncols); 170 __CTRACE("resize: win->wattr = %08x\n", win->wattr); 171 __CTRACE("resize: win->flags = %#.4x\n", win->flags); 172 __CTRACE("resize: win->maxy = %d\n", win->maxy); 173 __CTRACE("resize: win->maxx = %d\n", win->maxx); 174 __CTRACE("resize: win->begy = %d\n", win->begy); 175 __CTRACE("resize: win->begx = %d\n", win->begx); 176 __CTRACE("resize: win->scr_t = %d\n", win->scr_t); 177 __CTRACE("resize: win->scr_b = %d\n", win->scr_b); 178 #endif 179 180 if (nlines <= 0 || ncols <= 0) 181 nlines = ncols = 0; 182 else { 183 /* Reallocate line pointer array and line space. */ 184 newlines = realloc(win->lines, nlines * sizeof(__LINE *)); 185 if (newlines == NULL) 186 return ERR; 187 win->lines = newlines; 188 189 newlspace = realloc(win->lspace, nlines * sizeof(__LINE)); 190 if (newlspace == NULL) 191 return ERR; 192 win->lspace = newlspace; 193 } 194 195 /* Don't allocate window and line space if it's a subwindow */ 196 if (win->orig == NULL) { 197 /* 198 * Allocate window space in one chunk. 199 */ 200 if (ncols != 0) { 201 newwspace = realloc(win->wspace, 202 ncols * nlines * sizeof(__LDATA)); 203 if (newwspace == NULL) 204 return ERR; 205 win->wspace = newwspace; 206 } 207 208 /* 209 * Point line pointers to line space, and lines themselves into 210 * window space. 211 */ 212 for (lp = win->lspace, i = 0; i < nlines; i++, lp++) { 213 win->lines[i] = lp; 214 lp->line = &win->wspace[i * ncols]; 215 #ifdef DEBUG 216 lp->sentinel = SENTINEL_VALUE; 217 #endif 218 lp->firstchp = &lp->firstch; 219 lp->lastchp = &lp->lastch; 220 lp->firstch = 0; 221 lp->lastch = ncols - 1; 222 lp->flags = __ISDIRTY; 223 } 224 } else { 225 226 win->ch_off = win->begx - win->orig->begx; 227 /* Point line pointers to line space. */ 228 for (lp = win->lspace, i = 0; i < nlines; i++, lp++) { 229 win->lines[i] = lp; 230 olp = win->orig->lines[i + win->begy 231 - win->orig->begy]; 232 lp->line = &olp->line[win->ch_off]; 233 #ifdef DEBUG 234 lp->sentinel = SENTINEL_VALUE; 235 #endif 236 lp->firstchp = &olp->firstch; 237 lp->lastchp = &olp->lastch; 238 lp->flags = __ISDIRTY; 239 } 240 } 241 242 243 win->cury = win->curx = 0; 244 win->maxy = nlines; 245 win->maxx = ncols; 246 win->scr_b = win->maxy - 1; 247 __swflags(win); 248 249 /* 250 * we must zot the window contents otherwise lines may pick 251 * up attributes from the previous line when the window is 252 * made smaller. The client will redraw the window anyway 253 * so this is no big deal. 254 */ 255 for (i = 0; i < win->maxy; i++) { 256 lp = win->lines[i]; 257 for (sp = lp->line, j = 0; j < win->maxx; j++, sp++) { 258 sp->ch = ' '; 259 sp->bch = ' '; 260 sp->attr = 0; 261 sp->battr = 0; 262 } 263 lp->hash = __hash((char *)(void *)lp->line, 264 (size_t) (ncols * __LDATASIZE)); 265 } 266 267 #ifdef DEBUG 268 __CTRACE("resize: win->wattr = %08x\n", win->wattr); 269 __CTRACE("resize: win->flags = %#.4x\n", win->flags); 270 __CTRACE("resize: win->maxy = %d\n", win->maxy); 271 __CTRACE("resize: win->maxx = %d\n", win->maxx); 272 __CTRACE("resize: win->begy = %d\n", win->begy); 273 __CTRACE("resize: win->begx = %d\n", win->begx); 274 __CTRACE("resize: win->scr_t = %d\n", win->scr_t); 275 __CTRACE("resize: win->scr_b = %d\n", win->scr_b); 276 #endif 277 278 if (win->orig == NULL) { 279 /* bound subwindows to new size and fixup their pointers */ 280 for (swin = win->nextp; swin != win; swin = swin->nextp) { 281 y = swin->reqy; 282 if (swin->begy + y > win->begy + win->maxy) 283 y = 0; 284 if (y <= 0) 285 y += win->begy + win->maxy - swin->begy; 286 x = swin->reqx; 287 if (swin->begx + x > win->begx + win->maxx) 288 x = 0; 289 if (x <= 0) 290 x += win->begy + win->maxx - swin->begx; 291 __resizewin(swin, y, x); 292 } 293 } 294 295 return OK; 296 } 297 298
Indexes created Mon Sep 22 13:09:51 GMT 2025