touchwin.c revision 1.30
1 /* $NetBSD: touchwin.c,v 1.30 2017/01/06 13:53:18 roy Exp $ */ 2 3 /* 4 * Copyright (c) 1981, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 #if 0 35 static char sccsid[] = "@(#)touchwin.c 8.2 (Berkeley) 5/4/94"; 36 #else 37 __RCSID("$NetBSD: touchwin.c,v 1.30 2017/01/06 13:53:18 roy Exp $"); 38 #endif 39 #endif /* not lint */ 40 41 #include "curses.h" 42 #include "curses_private.h" 43 44 static int _cursesi_touchline_force(WINDOW *, int, int, int, int); 45 46 /* 47 * __sync -- 48 * To be called after each window change. 49 */ 50 void 51 __sync(WINDOW *win) 52 { 53 54 if (win->flags & __IMMEDOK) 55 wrefresh(win); 56 if (win->flags & __SYNCOK) 57 wsyncup(win); 58 } 59 60 /* 61 * is_linetouched -- 62 * Indicate if line has been touched or not. 63 */ 64 bool 65 is_linetouched(WINDOW *win, int line) 66 { 67 if (line > win->maxy) 68 return FALSE; 69 70 return (win->alines[line]->flags & __ISDIRTY) != 0; 71 } 72 73 /* 74 * touchline -- 75 * Touch count lines starting at start. This is the SUS v2 compliant 76 * version. 77 */ 78 int 79 touchline(WINDOW *win, int start, int count) 80 { 81 #ifdef DEBUG 82 __CTRACE(__CTRACE_LINE, "touchline: (%p, %d, %d)\n", win, start, count); 83 #endif 84 return wtouchln(win, start, count, 1); 85 } 86 87 /* 88 * wredrawln -- 89 * Mark count lines starting at start as corrupted. Implemented using 90 * wtouchln(). 91 */ 92 int wredrawln(WINDOW *win, int start, int count) 93 { 94 #ifdef DEBUG 95 __CTRACE(__CTRACE_LINE, "wredrawln: (%p, %d, %d)\n", win, start, count); 96 #endif 97 return wtouchln(win, start, count, 1); 98 } 99 100 /* 101 * is_wintouched -- 102 * Check if the window has been touched. 103 */ 104 bool 105 is_wintouched(WINDOW *win) 106 { 107 int y, maxy; 108 109 maxy = win->maxy; 110 for (y = 0; y < maxy; y++) { 111 if (is_linetouched(win, y) == TRUE) 112 return TRUE; 113 } 114 115 return FALSE; 116 } 117 118 /* 119 * touchwin -- 120 * Make it look like the whole window has been changed. 121 */ 122 int 123 touchwin(WINDOW *win) 124 { 125 #ifdef DEBUG 126 __CTRACE(__CTRACE_LINE, "touchwin: (%p)\n", win); 127 #endif 128 return wtouchln(win, 0, win->maxy, 1); 129 } 130 131 /* 132 * redrawwin -- 133 * Mark entire window as corrupted. Implemented using wtouchln(). 134 */ 135 int 136 redrawwin(WINDOW *win) 137 { 138 #ifdef DEBUG 139 __CTRACE(__CTRACE_LINE, "redrawwin: (%p)\n", win); 140 #endif 141 return wtouchln(win, 0, win->maxy, 1); 142 } 143 144 /* 145 * untouchwin -- 146 * Make it look like the window has not been changed. 147 */ 148 int 149 untouchwin(WINDOW *win) 150 { 151 #ifdef DEBUG 152 __CTRACE(__CTRACE_LINE, "untouchwin: (%p)\n", win); 153 #endif 154 return wtouchln(win, 0, win->maxy, 0); 155 } 156 157 /* 158 * wtouchln -- 159 * If changed is 1 then touch n lines starting at line. If changed 160 * is 0 then mark the lines as unchanged. 161 */ 162 int 163 wtouchln(WINDOW *win, int line, int n, int changed) 164 { 165 int y; 166 __LINE *wlp; 167 168 #ifdef DEBUG 169 __CTRACE(__CTRACE_LINE, "wtouchln: (%p) %d, %d, %d\n", 170 win, line, n, changed); 171 #endif 172 if (line + n > win->maxy) 173 line = win->maxy - n; 174 for (y = line; y < line + n; y++) { 175 if (changed == 1) 176 _cursesi_touchline_force(win, y, 0, 177 (int) win->maxx - 1, 1); 178 else { 179 wlp = win->alines[y]; 180 if (*wlp->firstchp >= win->ch_off && 181 *wlp->firstchp < win->maxx + win->ch_off) 182 *wlp->firstchp = win->maxx + win->ch_off; 183 if (*wlp->lastchp >= win->ch_off && 184 *wlp->lastchp < win->maxx + win->ch_off) 185 *wlp->lastchp = win->ch_off; 186 wlp->flags &= ~(__ISDIRTY | __ISFORCED); 187 } 188 } 189 190 return OK; 191 } 192 193 int 194 __touchwin(WINDOW *win) 195 { 196 int y, maxy; 197 198 #ifdef DEBUG 199 __CTRACE(__CTRACE_LINE, "__touchwin: (%p)\n", win); 200 #endif 201 maxy = win->maxy; 202 for (y = 0; y < maxy; y++) 203 __touchline(win, y, 0, (int) win->maxx - 1); 204 return OK; 205 } 206 207 int 208 __touchline(WINDOW *win, int y, int sx, int ex) 209 { 210 211 return _cursesi_touchline_force(win, y, sx, ex, 0); 212 } 213 214 /* 215 * Touch line y on window win starting from column sx and ending at 216 * column ex. If force is 1 then we mark this line as a forced update 217 * which will bypass screen optimisation in the refresh code to rewrite 218 * this line unconditionally (even if refresh thinks the screen matches 219 * what is in the virtscr) 220 */ 221 static int 222 _cursesi_touchline_force(WINDOW *win, int y, int sx, int ex, int force) 223 { 224 225 #ifdef DEBUG 226 __CTRACE(__CTRACE_LINE, "__touchline: (%p, %d, %d, %d, %d)\n", 227 win, y, sx, ex, force); 228 __CTRACE(__CTRACE_LINE, "__touchline: first = %d, last = %d\n", 229 *win->alines[y]->firstchp, *win->alines[y]->lastchp); 230 #endif 231 sx += win->ch_off; 232 ex += win->ch_off; 233 win->alines[y]->flags |= __ISDIRTY; 234 if (force == 1) 235 win->alines[y]->flags |= __ISFORCED; 236 /* firstchp/lastchp are shared between parent window and sub-window. */ 237 if (*win->alines[y]->firstchp > sx) 238 *win->alines[y]->firstchp = sx; 239 if (*win->alines[y]->lastchp < ex) 240 *win->alines[y]->lastchp = ex; 241 #ifdef DEBUG 242 __CTRACE(__CTRACE_LINE, "__touchline: first = %d, last = %d\n", 243 *win->alines[y]->firstchp, *win->alines[y]->lastchp); 244 #endif 245 return OK; 246 } 247 248 void 249 wsyncup(WINDOW *win) 250 { 251 252 do { 253 __touchwin(win); 254 win = win->orig; 255 } while (win); 256 } 257 258 void 259 wsyncdown(WINDOW *win) 260 { 261 WINDOW *w = win->orig; 262 263 while (w) { 264 if (is_wintouched(w)) { 265 __touchwin(win); 266 break; 267 } 268 w = w->orig; 269 } 270 } 271
Indexes created Sat Sep 20 22:09:52 GMT 2025