1 /* $NetBSD: touchwin.c,v 1.27 2013/12/06 11:23:47 blymn 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 1.27 2013/12/06 11:23:47 blymn 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 * is_linetouched -- 48 * Indicate if line has been touched or not. 49 */ 50 bool 51 is_linetouched(WINDOW *win, int line) 52 { 53 if (line > win->maxy) 54 return FALSE; 55 56 return ((win->alines[line]->flags & __ISDIRTY) != 0); 57 } 58 59 /* 60 * touchline -- 61 * Touch count lines starting at start. This is the SUS v2 compliant 62 * version. 63 */ 64 int 65 touchline(WINDOW *win, int start, int count) 66 { 67 #ifdef DEBUG 68 __CTRACE(__CTRACE_LINE, "touchline: (%p, %d, %d)\n", win, start, count); 69 #endif 70 return wtouchln(win, start, count, 1); 71 } 72 73 /* 74 * wredrawln -- 75 * Mark count lines starting at start as corrupted. Implemented using 76 * wtouchln(). 77 */ 78 int wredrawln(WINDOW *win, int start, int count) 79 { 80 #ifdef DEBUG 81 __CTRACE(__CTRACE_LINE, "wredrawln: (%p, %d, %d)\n", win, start, count); 82 #endif 83 return wtouchln(win, start, count, 1); 84 } 85 86 /* 87 * is_wintouched -- 88 * Check if the window has been touched. 89 */ 90 bool 91 is_wintouched(WINDOW *win) 92 { 93 int y, maxy; 94 95 maxy = win->maxy; 96 for (y = 0; y < maxy; y++) { 97 if (is_linetouched(win, y) == TRUE) 98 return TRUE; 99 } 100 101 return FALSE; 102 } 103 104 /* 105 * touchwin -- 106 * Make it look like the whole window has been changed. 107 */ 108 int 109 touchwin(WINDOW *win) 110 { 111 #ifdef DEBUG 112 __CTRACE(__CTRACE_LINE, "touchwin: (%p)\n", win); 113 #endif 114 return wtouchln(win, 0, win->maxy, 1); 115 } 116 117 /* 118 * redrawwin -- 119 * Mark entire window as corrupted. Implemented using wtouchln(). 120 */ 121 int 122 redrawwin(WINDOW *win) 123 { 124 #ifdef DEBUG 125 __CTRACE(__CTRACE_LINE, "redrawwin: (%p)\n", win); 126 #endif 127 return wtouchln(win, 0, win->maxy, 1); 128 } 129 130 /* 131 * untouchwin -- 132 * Make it look like the window has not been changed. 133 */ 134 int 135 untouchwin(WINDOW *win) 136 { 137 #ifdef DEBUG 138 __CTRACE(__CTRACE_LINE, "untouchwin: (%p)\n", win); 139 #endif 140 return wtouchln(win, 0, win->maxy, 0); 141 } 142 143 /* 144 * wtouchln -- 145 * If changed is 1 then touch n lines starting at line. If changed 146 * is 0 then mark the lines as unchanged. 147 */ 148 int 149 wtouchln(WINDOW *win, int line, int n, int changed) 150 { 151 int y; 152 __LINE *wlp; 153 154 #ifdef DEBUG 155 __CTRACE(__CTRACE_LINE, "wtouchln: (%p) %d, %d, %d\n", 156 win, line, n, changed); 157 #endif 158 if (line + n > win->maxy) 159 line = win->maxy - n; 160 for (y = line; y < line + n; y++) { 161 if (changed == 1) 162 _cursesi_touchline_force(win, y, 0, 163 (int) win->maxx - 1, 1); 164 else { 165 wlp = win->alines[y]; 166 if (*wlp->firstchp >= win->ch_off && 167 *wlp->firstchp < win->maxx + win->ch_off) 168 *wlp->firstchp = win->maxx + win->ch_off; 169 if (*wlp->lastchp >= win->ch_off && 170 *wlp->lastchp < win->maxx + win->ch_off) 171 *wlp->lastchp = win->ch_off; 172 wlp->flags &= ~(__ISDIRTY | __ISFORCED); 173 } 174 } 175 176 return OK; 177 } 178 179 int 180 __touchwin(WINDOW *win) 181 { 182 int y, maxy; 183 184 #ifdef DEBUG 185 __CTRACE(__CTRACE_LINE, "__touchwin: (%p)\n", win); 186 #endif 187 maxy = win->maxy; 188 for (y = 0; y < maxy; y++) 189 __touchline(win, y, 0, (int) win->maxx - 1); 190 return (OK); 191 } 192 193 int 194 __touchline(WINDOW *win, int y, int sx, int ex) 195 { 196 return (_cursesi_touchline_force(win, y, sx, ex, 0)); 197 } 198 199 /* 200 * Touch line y on window win starting from column sx and ending at 201 * column ex. If force is 1 then we mark this line as a forced update 202 * which will bypass screen optimisation in the refresh code to rewrite 203 * this line unconditionally (even if refresh thinks the screen matches 204 * what is in the virtscr) 205 */ 206 static int 207 _cursesi_touchline_force(WINDOW *win, int y, int sx, int ex, int force) 208 { 209 #ifdef DEBUG 210 __CTRACE(__CTRACE_LINE, "__touchline: (%p, %d, %d, %d)\n", 211 win, y, sx, ex); 212 __CTRACE(__CTRACE_LINE, "__touchline: first = %d, last = %d\n", 213 *win->alines[y]->firstchp, *win->alines[y]->lastchp); 214 #endif 215 sx += win->ch_off; 216 ex += win->ch_off; 217 win->alines[y]->flags |= __ISDIRTY; 218 if (force == 1) 219 win->alines[y]->flags |= __ISFORCED; 220 /* firstchp/lastchp are shared between parent window and sub-window. */ 221 if (*win->alines[y]->firstchp > sx) 222 *win->alines[y]->firstchp = sx; 223 if (*win->alines[y]->lastchp < ex) 224 *win->alines[y]->lastchp = ex; 225 #ifdef DEBUG 226 __CTRACE(__CTRACE_LINE, "__touchline: first = %d, last = %d\n", 227 *win->alines[y]->firstchp, *win->alines[y]->lastchp); 228 #endif 229 return (OK); 230 } 231 232 void 233 wsyncup(WINDOW *win) 234 { 235 236 do { 237 __touchwin(win); 238 win = win->orig; 239 } while (win); 240 } 241 242 void 243 wsyncdown(WINDOW *win) 244 { 245 WINDOW *w = win->orig; 246 247 while (w) { 248 if (is_wintouched(w)) { 249 __touchwin(win); 250 break; 251 } 252 w = w->orig; 253 } 254 } 255