resize.c revision 1.13
1 /* $NetBSD: resize.c,v 1.13 2007/01/21 13:25:36 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 1.13 2007/01/21 13:25:36 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; 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(__CTRACE_WINDOW, "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 win = list->winp; 147 148 if (!(win->flags & __ISPAD)) 149 __swflags(win); 150 } 151 152 wrefresh(curscr); 153 return OK; 154 } 155 156 /* 157 * __resizewin -- 158 * Resize the given window. 159 */ 160 static int 161 __resizewin(WINDOW *win, int nlines, int ncols) 162 { 163 __LINE *lp, *olp, **newlines, *newlspace; 164 __LDATA *sp; 165 __LDATA *newwspace; 166 int i, j; 167 int y, x; 168 WINDOW *swin; 169 170 #ifdef DEBUG 171 __CTRACE(__CTRACE_WINDOW, "resize: (%p, %d, %d)\n", win, nlines, ncols); 172 __CTRACE(__CTRACE_WINDOW, "resize: win->wattr = %08x\n", win->wattr); 173 __CTRACE(__CTRACE_WINDOW, "resize: win->flags = %#.4x\n", win->flags); 174 __CTRACE(__CTRACE_WINDOW, "resize: win->maxy = %d\n", win->maxy); 175 __CTRACE(__CTRACE_WINDOW, "resize: win->maxx = %d\n", win->maxx); 176 __CTRACE(__CTRACE_WINDOW, "resize: win->begy = %d\n", win->begy); 177 __CTRACE(__CTRACE_WINDOW, "resize: win->begx = %d\n", win->begx); 178 __CTRACE(__CTRACE_WINDOW, "resize: win->scr_t = %d\n", win->scr_t); 179 __CTRACE(__CTRACE_WINDOW, "resize: win->scr_b = %d\n", win->scr_b); 180 #endif 181 182 if (nlines <= 0 || ncols <= 0) 183 nlines = ncols = 0; 184 else { 185 /* Reallocate line pointer array and line space. */ 186 newlines = realloc(win->lines, nlines * sizeof(__LINE *)); 187 if (newlines == NULL) 188 return ERR; 189 win->lines = newlines; 190 191 newlspace = realloc(win->lspace, nlines * sizeof(__LINE)); 192 if (newlspace == NULL) 193 return ERR; 194 win->lspace = newlspace; 195 } 196 197 /* Don't allocate window and line space if it's a subwindow */ 198 if (win->orig == NULL) { 199 /* 200 * Allocate window space in one chunk. 201 */ 202 if (ncols != 0) { 203 newwspace = realloc(win->wspace, 204 ncols * nlines * sizeof(__LDATA)); 205 if (newwspace == NULL) 206 return ERR; 207 win->wspace = newwspace; 208 } 209 210 /* 211 * Point line pointers to line space, and lines themselves into 212 * window space. 213 */ 214 for (lp = win->lspace, i = 0; i < nlines; i++, lp++) { 215 win->lines[i] = lp; 216 lp->line = &win->wspace[i * ncols]; 217 #ifdef DEBUG 218 lp->sentinel = SENTINEL_VALUE; 219 #endif 220 lp->firstchp = &lp->firstch; 221 lp->lastchp = &lp->lastch; 222 lp->firstch = 0; 223 lp->lastch = ncols - 1; 224 lp->flags = __ISDIRTY; 225 } 226 } else { 227 228 win->ch_off = win->begx - win->orig->begx; 229 /* Point line pointers to line space. */ 230 for (lp = win->lspace, i = 0; i < nlines; i++, lp++) { 231 win->lines[i] = lp; 232 olp = win->orig->lines[i + win->begy 233 - win->orig->begy]; 234 lp->line = &olp->line[win->ch_off]; 235 #ifdef DEBUG 236 lp->sentinel = SENTINEL_VALUE; 237 #endif 238 lp->firstchp = &olp->firstch; 239 lp->lastchp = &olp->lastch; 240 lp->flags = __ISDIRTY; 241 } 242 } 243 244 245 win->cury = win->curx = 0; 246 win->maxy = nlines; 247 win->maxx = ncols; 248 win->scr_b = win->maxy - 1; 249 __swflags(win); 250 251 /* 252 * we must zot the window contents otherwise lines may pick 253 * up attributes from the previous line when the window is 254 * made smaller. The client will redraw the window anyway 255 * so this is no big deal. 256 */ 257 for (i = 0; i < win->maxy; i++) { 258 lp = win->lines[i]; 259 for (sp = lp->line, j = 0; j < win->maxx; j++, sp++) { 260 sp->ch = ' '; 261 sp->attr = 0; 262 } 263 lp->hash = __hash((char *)(void *)lp->line, 264 (size_t) (ncols * __LDATASIZE)); 265 } 266 267 #ifdef DEBUG 268 __CTRACE(__CTRACE_WINDOW, "resize: win->wattr = %08x\n", win->wattr); 269 __CTRACE(__CTRACE_WINDOW, "resize: win->flags = %#.4x\n", win->flags); 270 __CTRACE(__CTRACE_WINDOW, "resize: win->maxy = %d\n", win->maxy); 271 __CTRACE(__CTRACE_WINDOW, "resize: win->maxx = %d\n", win->maxx); 272 __CTRACE(__CTRACE_WINDOW, "resize: win->begy = %d\n", win->begy); 273 __CTRACE(__CTRACE_WINDOW, "resize: win->begx = %d\n", win->begx); 274 __CTRACE(__CTRACE_WINDOW, "resize: win->scr_t = %d\n", win->scr_t); 275 __CTRACE(__CTRACE_WINDOW, "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 Sun Sep 21 16:09:51 GMT 2025